The multi-functional water pump controls the valve cities and towns and builds the sector standard
Information source: Water pump network
It is PN1 that this standard is suitable for the nominal pressure. 0MPa-PN4. 0MPa, leads to the foot-path to control the valve for the multi-functional water pump of DN50mm-DN1200mm nominally.
Introduce the standard technical requirement as follows now:
A pressure - -Temperature is spent grade
The multi-functional water pump controls the pressure of the valve - -Temperature grade by shell, piece and control in charge of systematic pressure of material inside - -The temperature grade is fixed. The multi-functional water pump controls the biggest permission working pressure of the valve at a certain temperature and fetches the shell, one and control is in charge of the systematic material and allow the low value of the value of working pressure the most greatly at this temperature inside.
1. Pressure of a shell made of iron - -The temperature grade should accord with GB/T17241. 7 regulations.
1. The pressures of 2 steel shells - -The temperature grade should accord with the regulations of GB/T9124.
1. 3, to GB/T17241. 7,GB/T9124 has not stipulated the pressure - -The material of the temperature grade, according to the regulation about the standard or design.
2 valves of body
2. A valve of body flange
The flange should be cast with the body of valve wholly. Pattern and size of the flange made of iron should accord with GB/T17241. 6 regulations, the technological condition should accord with GB/T17241. 7 regulations; Pattern and size of the steel flange should accord with GB/T9113. The regulation of 1, the technological condition should accord with the regulations of GB/T9124.
2. The structural length of 2 valves of body is shown in Table 1.
2. It should accord with the regulations of Table 3 in GB/T13932- 1992 that the minimum wall of body of thick casting iron a valve of the minimum walls of 3 valves of body is thick, it should accord with the regulations of Table 1 in JB/T8937- 1999 to cast steel in the minimum wall of body of a valve thick.
3 valves are covered Diaphragm seat
3. A valve overlays and should adopt the flange type with diaphragm seat, diaphragm seat and connection pattern of the body of valve.
3. The bolt quantity of connection with the body of valve of 2 diaphragms of seats is no less than 4.
3. 3 valves cover and press 2 thick with the minimum wall of the diaphragm seat. Requirement for 3.
3. It should be the round that 4 valves are covered with the flange of the diaphragm seat. The flange can adopt the level type, dash for ward the surface type or unsmooth type while sealing the pattern of the surface
4 valve stems, closing the valve board, main valve board slowly
4. 1 closes the valve board and valve stem slowly and should be joined and fastened, reliable.
4. 2 sealed patterns of closing the valve board and main valve board slowly should adopt the sealed pattern of metal.
4. 3 main valves of boards and valve stem must be slipped flexibly, reliably.
4. The sealing of 4 main valves of boards and main valve board seat can adopt the metal to seal and seal two patterns of planting nonmetally.
5 diaphragms
5. A diaphragm of performance should accord with Table 2 (see next page) Regulation.
5. 2 diaphragms of appearance quality should accord with the regulations of HG/T3090.
5. 3 should accord with the regulations of GB/T17219 in security of the diaphragm material when applying to the life drinking water.
6 is controlled and is in charge of the system
Control the supreme working pressure that every component in charge of the system should be able to bear the valve, leakage can't take place in every position.
7 materials
7. The exertion of a main spare part material should be according to the regulation of JB/T5300.
7. 2 copper alloy casting should accord with the regulations of GB/T12225; Gray casting iron casting should accord with the regulations of GB/T12226, its tensile strength should not be smaller than 200MPa; The nodular cast iron casting should accord with the regulations of GB/T12227; The carbon steel casting should accord with the regulations of GB/T12229; The steel casting of body should accord with the regulations of GB/T12230 in.
7. 3 steel multi-functional water pumps should accord with the regulations of JB/T7927 while controlling the casting appearance quality of the valve, the multi-functional water pump made of iron controls the casting regulation of consulting JB/T7927 of appearance quality of the valve.
Shell intensity 8
The multi-functional water pump should accord with the regulations of GB/T13927 while controlling the shell intensity of the valve.
9 sealing properties
The multi-functional water pump should accord with the regulations of GB/T13927 while controlling the sealing property of the valve.
10 clean degrees of multi-functional water pump control cleanness degree of valve should accord with the regulations of JB/T7748.
11 scribbles and puts it when applying to the life drinking water, the multi-functional water pump is controlled in the valve it should accord with the regulations of GB/T17219 that applies security containing material. The outer surface scribbles and can not pretend to stipulate, the special requirement is marked out in the contract for future delivery.
This standard is drafted by Zhuzhou southern valve Manufacturing Co., Ltd.
Monday, December 8, 2008
Wednesday, August 27, 2008
Mainly switching over the method to compare sparely of fire control pump
Mainly switching over the method to compare sparely of fire control pump
Summary: The pump mainly spare switching over of fire control guarantees the requirement that the spare pump of fire control operates. Choice that its key of switching over the method is the control signal. This text mainly switches over the comparison, analysis of the method sparely through two kinds of fire control pumps, it is superior to the electric current signal method to put forward the method to adopt the pressure signal and control in the system of supplying water of fire control, propose mainly switching over sparely and adopting the pressure signal to control the method of the fire control pump.
Keyword: Fire control pump; Spare pump of fire control; Switch over the method; Compare
The fire control pump is the heart that the fire control supplied water in the system. In the system of supplying water of fire control, set up the security that the spare pump of fire control can increase the whole system, help, improve whole fire control supply water dependability of system. According to the national standard " norm that the architectural design fires prevention " (GBJ 16-87) Regulation,it is except room getting more than 25 L/ more s in water consumption in fire control for factory, warehouse and unit house to the ninth Floor of seven layers, the water pump of fixed fire control should have spare pumps, its ability to work should not be smaller than a main pump. " norm that the civil architectural design on the senior level fires prevention " (GB50045-95) China is 7. 5.3 articles stipulate too, should set up the water pump of spare fire control in system that fire control supplies water. Fire control pump mainly spare to switch over, realize spare pump of fire control shoot the important means that people work, it is the fire control too to supply water the system is reliable, important links of safe operation.
1,Mainly switching over the method sparely of fire control pump
From the viewpoint of collection and controlling of the pump actuating signal of fire control, the fire control pump in the design one mainly switches over and mainly has two kinds of methods sparely. Its key is a choice of a control signal source, it can be divided into a electric current signal and controlled the method and pressure signal and controlled the method. Usually the mainly spare pump of the fire control pump needs to design according to being both as the spare way.
It is a mainly spare commonsense method that switches over of the fire control pump in the design for fire protection now that the electric current signal controls the method. It to judge through feedbacking the motor electric current signal of the water pump whether the fire control pump work. As the electrical machinery shorts out (cut out) , when the electric current is too big, the power switches over to the electrical machinery of another water pump assembly automatically, stop the job of the fire control pump of first, start the pump job of another fire control.
Pressure signal control method pump surface person in over-all charge set up the nodal manometer of electricity in fire control, such as Fig. 1, the pump mainly spare switching over of fire control is that a signal by this manometer judged. Receive the movement order in the pump control cabinet of fire control, start any fire control pump at once, if fire control pump electricity pressure that nodal manometer point out work, fail pressure established to reach at the value, the control cabinet will be switched over to another fire control pump automatically, starting work.
Certainly, can appoint a fire control pump as the main pump or spare pump in the principle that the electric fire control pump controls arbitrarily. Electric current signal control method adopt initially at home at present, most many, and pressure signal control method automatic sprinkler system in foreign countries begin to be used, the pressure signal has controlled the method and provided the reliable way for automatic control of water system to fire control.
2,Mainly switch over the comparison of the method sparely
2.1,Reason analysis that the fire control pump breaks down
The trouble final result that the fire control pump appears is that a fire control pump can't be normal and watersupply. The main reason for pump trouble of fire control can be divided into two kinds, one is trouble of electrical machinery, another kind is a trouble of water pumps.
In the trouble of the electrical machinery, there are power questions, such as supplying power the abnormal outage, voltage that cause are too high or pass the low grade; Own question of the electrical machinery, if because the electrical machinery is damaged unable to run; Electrical machinery overload question, the axle power of water pump that the electrical machinery drives is too big or the pipeline stops up, it is too big and quiting work etc. to form the electric current.
In the trouble of the water pump, may be because bearing of the water pump, impeller,etc. question cause. According to the experience that the project is practised, the probability of the trouble of the electrical machinery should have higher probability than troubles of the water pump.
2.2,The fire control pump mainly switches over the analysis of the method sparely
Adopt the electric current signal to control the method, its advantage can reflect the trouble of the electrical machinery in time. And the trouble of electrical machinery is the main trouble of the water pump assembly. But this kind of method can not prove whether the fire control pump surfaces actually.
Adopt the pressure signal to control the method, can be by reflecting the real working condition of water pump assembly of fire control truly, its signal credibility switched over is relatively high. No matter the trouble of the electrical machinery or water pump trouble, so long as the pressure of the pump outlet pipe of fire control has not reached certain pressure value, need to switch over the mainly spare fire control pump in time. However, it has its shortcoming that the pressure signal controls the method. When the systematic surfacing amount of reality is bigger that fire control supplies water, after the pressure of the pump outlet pipe of fire control drops, it is apt to cause the signal of switching over of the pump pressure of fire control to act by mistake, stop the job of a fire control pump to switch over into the start of another fire control pump. The water pump is being switched over, restarted and needed for regular hour. In this way, certainly will cause the break that fire control supplied water, delay putting out the fire. In addition pressure signal control method can also design, consider short circuit, overload, excessive pressure of electrical machinery, lack looks, owe, press, not overheated to protect the function in circuit.
Analyze from the angle of the system, regard fire control pump and electrical machinery as the whole pump assembly of fire control to watch, judge watersupply final result i.e. water pump assembly its surface, it cuts to be to adopt pressure whom signal control mainly spare to switch over method to be comparatively reasonable. Supply water water consumption of system exceed flow of designing, can change at control circuit in fire control, expand the design of the electricity capacity of the fire control pump, guarantee the power consumption of all fire control pump work, and the power consumption of the fire control pump is only a part of the power consumption of all fire control during fire control, unlikely to cause greater influence to the whole electric power system of fire control. In this way, after the pressure of the outlet pipe is reduced, start another fire control pump in time, needn't consider the question of closing of the original fire control pump.
Proceed from angle of dependability, systematic dependability is to relate to structure of dependability that the fire control pump supplies water. Set up the mainly spare dependability block diagram and can be expressed as concerning, parallel connection relation between aircrew and aircrew of series connection between water pump and electrical machinery with pump assembly of fire control " ( 1) .
The reliability of the whole circuit can be expressed as R briefly. R =1 one (1 R1) X (a R2) =1 one (1 R1aXRlb) X (a R2aXR2b) . Can also find out directly, it is equally important to improve the fire control pump and dependability of the electrical machinery from Fig. 2. If only with an electrical machinery (1B or 2B) To judge it is not complete that system of supplying water is reliable. The person in over-all charge sets up the signal to adopt the reliability of the whole system and surface in the pump assembly of fire control promptly, with reliable significance.
What merits attention is when fire control pump outlet pipe pressure settlement of value, fire control high-order water tank give water pressure strength should consider put out the fire. So, as to the thing that the system that the indoor fire control of the temporary high pressure supplies water, its pressure value established should be greater than the for the strength of water pressuring of the pipe network at ordinary times. After another main pump in the fire control of starting, need to set up certain time delay, can go to judge the pressure value of the nodal manometer of electricity, confirm whether to need to switch over to the spare pump of another fire control. Propose setting up the nodal manometer of electricity after the pump outlet pipe valve of fire control (according to the rivers direction) Fire control last person in over-all charge,should set up among the pump outlet pipe non-return valve of fire control and alarm valve group of the water conservancy to for systemming, so as to ensure pressure signal is reliable.
2.3,Comparison of two kinds of control methods
It is the mainly spare way to switch over of the fire control pump that the electric current signal controls the method and pressure signal and controls the method. Fire control requirement that pump control identical, two method collection difference in signal, results controlled finally are different too.
Choose the mainly spare way to switch over of the fire control pump to have important meanings rationally. It supplies water to fire control systematic dependability plays a important assurance role. It helps the controlling truly of BA that the pressure signal controls the method, especially suitable for the automatic sprinkler system.
2.4,The pressure signal controls the question that the method needs to pay attention to
In the pressure signal controls the design of the method, need to pay attention to the following questions, so as to ensure what the fire control pump is mainly switched over sparely is reliable.
(1)Electricity nodal manometer should set up pump surface person in over-all charge in fire control, should not be set up before the fire control pump valve (according to the rivers direction) . The establishing value of pressure should be greater than the for the strength value of water pressuring of the water tank of high-order fire control.
This is because the position of the pressure signal should be able to reflect the fire control pump and watersupply operation operating mode of the system truly. If manometer set up pump surface valve in fire control, and valve close by mistake, then fire control pump though normal running, can reveal normal for the strength of water pressuring, but the watersupply operating mode of the system is abnormal. So, adopt the pressure signal to control switching over and can also adjust the watersupply operating mode with abnormal pipeline of the fire control pump of the method, start the fire control pump of another watersupply pipeline in time.
(2)In the signal controls the circuit design that is judged, it needs to set up the regular hour to delay time to switch over. Need one start-up time and time that the rivers passes in the pipeline after this is mainly started because of the fire control pump, the time to judge takes greater than two factors described above to delay time, can generally adopt 1- 2min. In this way, electricity nodal pressure control value of signal there is authenticity.
(3)The pressure signal controls switching over and can appoint the main pumps or spare pumps of the fire control pump arbitrarily of the method, can also switch over regularly.
(4)The control of the fire control pump should also be (manual) in situ besides automaticallying control Function controlled. The working signal of the fire control pump needs to convey to the control centre of fire control, the automatic control record in order to monitor, controlling and building.
Should consider enough electricity capacities of fire control pump in the design of the power of fire control. In the switching over of fire control pump, propose the power supply that does not stop the fire control pump of first, i.e. until two fire control state that pump supply power design when being most unfavorable, help, meet fire control supply water system in operation operating mode of state of overloading like this, and can reduce the time interval of the fire control pump at the time of switching over, let the fire control pump put into operation as soon as possible, improve the time that fire control supplies water.
3,Conclusion
(1)Choice that the mainly spare key switched over of the fire control pump is the control signal. Switching over the mainly spare method of the fire control pump mainly has electric current signal that controls and controls with the pressure signal.
(2)In the system of supplying water of fire control, the working result of the comprehensive water pump assembly, adopt the pressure signal to be superior to the electric current signal to control the method while controlling the method. The pressure signal controls the method and can reflect the operating mode that fire control supplies water truly, its dependability of switching over the signal is relatively high. Propose defining in relevant fire control norms the mainly spare pressure signal switched over of the fire control pump control the method.
(3)While adopting the pressure signal to control the method, electricity to switch over signal nodal manometer should behind the set up in fire control pump surface valve of person in over-all charge, or water conservancy alarm valve. Meanwhile, the pressure value of needing to set up certain time delay to judge the nodal manometer of electricity in the circuit design.
Summary: The pump mainly spare switching over of fire control guarantees the requirement that the spare pump of fire control operates. Choice that its key of switching over the method is the control signal. This text mainly switches over the comparison, analysis of the method sparely through two kinds of fire control pumps, it is superior to the electric current signal method to put forward the method to adopt the pressure signal and control in the system of supplying water of fire control, propose mainly switching over sparely and adopting the pressure signal to control the method of the fire control pump.
Keyword: Fire control pump; Spare pump of fire control; Switch over the method; Compare
The fire control pump is the heart that the fire control supplied water in the system. In the system of supplying water of fire control, set up the security that the spare pump of fire control can increase the whole system, help, improve whole fire control supply water dependability of system. According to the national standard " norm that the architectural design fires prevention " (GBJ 16-87) Regulation,it is except room getting more than 25 L/ more s in water consumption in fire control for factory, warehouse and unit house to the ninth Floor of seven layers, the water pump of fixed fire control should have spare pumps, its ability to work should not be smaller than a main pump. " norm that the civil architectural design on the senior level fires prevention " (GB50045-95) China is 7. 5.3 articles stipulate too, should set up the water pump of spare fire control in system that fire control supplies water. Fire control pump mainly spare to switch over, realize spare pump of fire control shoot the important means that people work, it is the fire control too to supply water the system is reliable, important links of safe operation.
1,Mainly switching over the method sparely of fire control pump
From the viewpoint of collection and controlling of the pump actuating signal of fire control, the fire control pump in the design one mainly switches over and mainly has two kinds of methods sparely. Its key is a choice of a control signal source, it can be divided into a electric current signal and controlled the method and pressure signal and controlled the method. Usually the mainly spare pump of the fire control pump needs to design according to being both as the spare way.
It is a mainly spare commonsense method that switches over of the fire control pump in the design for fire protection now that the electric current signal controls the method. It to judge through feedbacking the motor electric current signal of the water pump whether the fire control pump work. As the electrical machinery shorts out (cut out) , when the electric current is too big, the power switches over to the electrical machinery of another water pump assembly automatically, stop the job of the fire control pump of first, start the pump job of another fire control.
Pressure signal control method pump surface person in over-all charge set up the nodal manometer of electricity in fire control, such as Fig. 1, the pump mainly spare switching over of fire control is that a signal by this manometer judged. Receive the movement order in the pump control cabinet of fire control, start any fire control pump at once, if fire control pump electricity pressure that nodal manometer point out work, fail pressure established to reach at the value, the control cabinet will be switched over to another fire control pump automatically, starting work.
Certainly, can appoint a fire control pump as the main pump or spare pump in the principle that the electric fire control pump controls arbitrarily. Electric current signal control method adopt initially at home at present, most many, and pressure signal control method automatic sprinkler system in foreign countries begin to be used, the pressure signal has controlled the method and provided the reliable way for automatic control of water system to fire control.
2,Mainly switch over the comparison of the method sparely
2.1,Reason analysis that the fire control pump breaks down
The trouble final result that the fire control pump appears is that a fire control pump can't be normal and watersupply. The main reason for pump trouble of fire control can be divided into two kinds, one is trouble of electrical machinery, another kind is a trouble of water pumps.
In the trouble of the electrical machinery, there are power questions, such as supplying power the abnormal outage, voltage that cause are too high or pass the low grade; Own question of the electrical machinery, if because the electrical machinery is damaged unable to run; Electrical machinery overload question, the axle power of water pump that the electrical machinery drives is too big or the pipeline stops up, it is too big and quiting work etc. to form the electric current.
In the trouble of the water pump, may be because bearing of the water pump, impeller,etc. question cause. According to the experience that the project is practised, the probability of the trouble of the electrical machinery should have higher probability than troubles of the water pump.
2.2,The fire control pump mainly switches over the analysis of the method sparely
Adopt the electric current signal to control the method, its advantage can reflect the trouble of the electrical machinery in time. And the trouble of electrical machinery is the main trouble of the water pump assembly. But this kind of method can not prove whether the fire control pump surfaces actually.
Adopt the pressure signal to control the method, can be by reflecting the real working condition of water pump assembly of fire control truly, its signal credibility switched over is relatively high. No matter the trouble of the electrical machinery or water pump trouble, so long as the pressure of the pump outlet pipe of fire control has not reached certain pressure value, need to switch over the mainly spare fire control pump in time. However, it has its shortcoming that the pressure signal controls the method. When the systematic surfacing amount of reality is bigger that fire control supplies water, after the pressure of the pump outlet pipe of fire control drops, it is apt to cause the signal of switching over of the pump pressure of fire control to act by mistake, stop the job of a fire control pump to switch over into the start of another fire control pump. The water pump is being switched over, restarted and needed for regular hour. In this way, certainly will cause the break that fire control supplied water, delay putting out the fire. In addition pressure signal control method can also design, consider short circuit, overload, excessive pressure of electrical machinery, lack looks, owe, press, not overheated to protect the function in circuit.
Analyze from the angle of the system, regard fire control pump and electrical machinery as the whole pump assembly of fire control to watch, judge watersupply final result i.e. water pump assembly its surface, it cuts to be to adopt pressure whom signal control mainly spare to switch over method to be comparatively reasonable. Supply water water consumption of system exceed flow of designing, can change at control circuit in fire control, expand the design of the electricity capacity of the fire control pump, guarantee the power consumption of all fire control pump work, and the power consumption of the fire control pump is only a part of the power consumption of all fire control during fire control, unlikely to cause greater influence to the whole electric power system of fire control. In this way, after the pressure of the outlet pipe is reduced, start another fire control pump in time, needn't consider the question of closing of the original fire control pump.
Proceed from angle of dependability, systematic dependability is to relate to structure of dependability that the fire control pump supplies water. Set up the mainly spare dependability block diagram and can be expressed as concerning, parallel connection relation between aircrew and aircrew of series connection between water pump and electrical machinery with pump assembly of fire control " ( 1) .
The reliability of the whole circuit can be expressed as R briefly. R =1 one (1 R1) X (a R2) =1 one (1 R1aXRlb) X (a R2aXR2b) . Can also find out directly, it is equally important to improve the fire control pump and dependability of the electrical machinery from Fig. 2. If only with an electrical machinery (1B or 2B) To judge it is not complete that system of supplying water is reliable. The person in over-all charge sets up the signal to adopt the reliability of the whole system and surface in the pump assembly of fire control promptly, with reliable significance.
What merits attention is when fire control pump outlet pipe pressure settlement of value, fire control high-order water tank give water pressure strength should consider put out the fire. So, as to the thing that the system that the indoor fire control of the temporary high pressure supplies water, its pressure value established should be greater than the for the strength of water pressuring of the pipe network at ordinary times. After another main pump in the fire control of starting, need to set up certain time delay, can go to judge the pressure value of the nodal manometer of electricity, confirm whether to need to switch over to the spare pump of another fire control. Propose setting up the nodal manometer of electricity after the pump outlet pipe valve of fire control (according to the rivers direction) Fire control last person in over-all charge,should set up among the pump outlet pipe non-return valve of fire control and alarm valve group of the water conservancy to for systemming, so as to ensure pressure signal is reliable.
2.3,Comparison of two kinds of control methods
It is the mainly spare way to switch over of the fire control pump that the electric current signal controls the method and pressure signal and controls the method. Fire control requirement that pump control identical, two method collection difference in signal, results controlled finally are different too.
Choose the mainly spare way to switch over of the fire control pump to have important meanings rationally. It supplies water to fire control systematic dependability plays a important assurance role. It helps the controlling truly of BA that the pressure signal controls the method, especially suitable for the automatic sprinkler system.
2.4,The pressure signal controls the question that the method needs to pay attention to
In the pressure signal controls the design of the method, need to pay attention to the following questions, so as to ensure what the fire control pump is mainly switched over sparely is reliable.
(1)Electricity nodal manometer should set up pump surface person in over-all charge in fire control, should not be set up before the fire control pump valve (according to the rivers direction) . The establishing value of pressure should be greater than the for the strength value of water pressuring of the water tank of high-order fire control.
This is because the position of the pressure signal should be able to reflect the fire control pump and watersupply operation operating mode of the system truly. If manometer set up pump surface valve in fire control, and valve close by mistake, then fire control pump though normal running, can reveal normal for the strength of water pressuring, but the watersupply operating mode of the system is abnormal. So, adopt the pressure signal to control switching over and can also adjust the watersupply operating mode with abnormal pipeline of the fire control pump of the method, start the fire control pump of another watersupply pipeline in time.
(2)In the signal controls the circuit design that is judged, it needs to set up the regular hour to delay time to switch over. Need one start-up time and time that the rivers passes in the pipeline after this is mainly started because of the fire control pump, the time to judge takes greater than two factors described above to delay time, can generally adopt 1- 2min. In this way, electricity nodal pressure control value of signal there is authenticity.
(3)The pressure signal controls switching over and can appoint the main pumps or spare pumps of the fire control pump arbitrarily of the method, can also switch over regularly.
(4)The control of the fire control pump should also be (manual) in situ besides automaticallying control Function controlled. The working signal of the fire control pump needs to convey to the control centre of fire control, the automatic control record in order to monitor, controlling and building.
Should consider enough electricity capacities of fire control pump in the design of the power of fire control. In the switching over of fire control pump, propose the power supply that does not stop the fire control pump of first, i.e. until two fire control state that pump supply power design when being most unfavorable, help, meet fire control supply water system in operation operating mode of state of overloading like this, and can reduce the time interval of the fire control pump at the time of switching over, let the fire control pump put into operation as soon as possible, improve the time that fire control supplies water.
3,Conclusion
(1)Choice that the mainly spare key switched over of the fire control pump is the control signal. Switching over the mainly spare method of the fire control pump mainly has electric current signal that controls and controls with the pressure signal.
(2)In the system of supplying water of fire control, the working result of the comprehensive water pump assembly, adopt the pressure signal to be superior to the electric current signal to control the method while controlling the method. The pressure signal controls the method and can reflect the operating mode that fire control supplies water truly, its dependability of switching over the signal is relatively high. Propose defining in relevant fire control norms the mainly spare pressure signal switched over of the fire control pump control the method.
(3)While adopting the pressure signal to control the method, electricity to switch over signal nodal manometer should behind the set up in fire control pump surface valve of person in over-all charge, or water conservancy alarm valve. Meanwhile, the pressure value of needing to set up certain time delay to judge the nodal manometer of electricity in the circuit design.
The axial-flow pump regulates some methods of its performance in using
The axial-flow pump regulates some methods of its performance in using
The axial-flow pump, in using, the water pump performance does not accord with and produce the need, the water pump performance of the regulation soon sometimes, make it can meet the actual demands. Low water, summer flood season such as winter, entered the pond or went out of the water levels of the pond and all changed, i.e. the real topography pumps up water to highly change, lift and flow determined originally do not suit, efficiency is reduced, the water pump runs uneconomically. If so, want the water pump to work under higher efficiency, this needs to regulate the water pump performance.
The performance of the axial-flow pump is regulated, usually adopt two kinds of methods:
1,Change speed and regulate us and already know, Wholesale Electronics the axial-flow pump works under certain rotational speed, and obtained corresponding flow, lift, power and efficiency,etc.. After changing in rotational speed, its performance parameter changes accordingly too, thus achieve the goal of regulating. If the axial-flow pump uses diesel engine or petrol machine as power, can change the throttle size to change speed; If the axial-flow pump connected with generator to adopt the V belt or flat belt and transmit the device indirectly, can change the diameter of belt pulley of the transmission to change speed, change the initiative wheels or will all do from the driving wheels, the purpose is to change the speed ratio of the transmission. Change speed and regulate the water pump performance, more economic, the applicable scope is relatively wide, can adopt all agricultural water pumps.
2,Turn into the angle and regulate it according to structure, the impeller of the axial-flow pump has enormous hubs, blade of the adjustable angle easy to install. After installing the angle to change in the blade, the blade has just High pressure pumps|Mud pumps|Slush Pumps|Piston Pumps|sex toysReciprocating Pumps|Water Injection Pumps|Steam Injection Pumps|Metering Pumps|Double Screw Pumps|Pressure testing Pumps|Oilfield Skid Mounted Pumps changed to the lift of water, thus changed the working performance of the water pump, this is the turning into the angle and regulating of an axial-flow pump. Install the increase of the angle, diminish with the blade, the flow, lift, power of the axial-flow pump change with it promptly, however, the efficiency peak has no change, help the axial-flow pump performance to regulate very much.
At the structure, blade install the device situation of corner, the blade is divided into three types according to impeller:
( 1) Getting fixed blade blade and hub cast, become one whole, blade install horn to be while design and make fixed already, can't change in the course of using. This kind of impeller is used in small-scale pumps more.
( 2) Half regulate blade at impeller hub, each fixed nut and orient screw unclamp of blade, as requested, become unanimity of the installation angle adjustment of the blade, fasten it. General blade install corner from shoulder 100-180. Within this range, regulate according to the instructions for use.
( 3) Living leaf type blade blade regulate through angle that design especially organization come on, change, needn't dismantle the impeller, can drive the organization to change the blade to install the angle directly, it regulates the range from 0- 260. The angle of blade has machinery to regulate and regulate two kinds with the hydraulic pressure to regulate the organization. This kind of impeller is mostly that the large-scale axial-flow pumps are adopted.
The axial-flow pump, in using, the water pump performance does not accord with and produce the need, the water pump performance of the regulation soon sometimes, make it can meet the actual demands. Low water, summer flood season such as winter, entered the pond or went out of the water levels of the pond and all changed, i.e. the real topography pumps up water to highly change, lift and flow determined originally do not suit, efficiency is reduced, the water pump runs uneconomically. If so, want the water pump to work under higher efficiency, this needs to regulate the water pump performance.
The performance of the axial-flow pump is regulated, usually adopt two kinds of methods:
1,Change speed and regulate us and already know, Wholesale Electronics the axial-flow pump works under certain rotational speed, and obtained corresponding flow, lift, power and efficiency,etc.. After changing in rotational speed, its performance parameter changes accordingly too, thus achieve the goal of regulating. If the axial-flow pump uses diesel engine or petrol machine as power, can change the throttle size to change speed; If the axial-flow pump connected with generator to adopt the V belt or flat belt and transmit the device indirectly, can change the diameter of belt pulley of the transmission to change speed, change the initiative wheels or will all do from the driving wheels, the purpose is to change the speed ratio of the transmission. Change speed and regulate the water pump performance, more economic, the applicable scope is relatively wide, can adopt all agricultural water pumps.
2,Turn into the angle and regulate it according to structure, the impeller of the axial-flow pump has enormous hubs, blade of the adjustable angle easy to install. After installing the angle to change in the blade, the blade has just High pressure pumps|Mud pumps|Slush Pumps|Piston Pumps|sex toysReciprocating Pumps|Water Injection Pumps|Steam Injection Pumps|Metering Pumps|Double Screw Pumps|Pressure testing Pumps|Oilfield Skid Mounted Pumps changed to the lift of water, thus changed the working performance of the water pump, this is the turning into the angle and regulating of an axial-flow pump. Install the increase of the angle, diminish with the blade, the flow, lift, power of the axial-flow pump change with it promptly, however, the efficiency peak has no change, help the axial-flow pump performance to regulate very much.
At the structure, blade install the device situation of corner, the blade is divided into three types according to impeller:
( 1) Getting fixed blade blade and hub cast, become one whole, blade install horn to be while design and make fixed already, can't change in the course of using. This kind of impeller is used in small-scale pumps more.
( 2) Half regulate blade at impeller hub, each fixed nut and orient screw unclamp of blade, as requested, become unanimity of the installation angle adjustment of the blade, fasten it. General blade install corner from shoulder 100-180. Within this range, regulate according to the instructions for use.
( 3) Living leaf type blade blade regulate through angle that design especially organization come on, change, needn't dismantle the impeller, can drive the organization to change the blade to install the angle directly, it regulates the range from 0- 260. The angle of blade has machinery to regulate and regulate two kinds with the hydraulic pressure to regulate the organization. This kind of impeller is mostly that the large-scale axial-flow pumps are adopted.
The column is filled in the relevant introducing and selecting type main points of the pump
The column is filled in the relevant introducing and selecting type main points of the pump
It is the key process in the nonmetal production that the mud of high pressure sends and pigeonholes the straining machine with the board frame, the mud flows under the high pressure, wear and tear very much strong, the ordinary pump can be employed under this operating mode. In order to solve the difficult problem of this craft, column of YB serial ceramic oil pressure that mechanical Manufacturing Co., Ltd produces is filled in the pump in the favor of Xi'an, this pump exports the high, wear-resisting and of good performance, maintains and convenient advantage of the pressure, fill domestically and onlily in the pump manufacturer through ceramic column of TUV international authentication. YB serial ceramic oil pressure column fill in pump apply ceramic production to to spray dry Tamerlan transport mud first, produce ceramic spraying dry tower need Y B serial ceramic oil pressure column fill in the pump while being none of now. At present, applying to fields such as pottery, electric porcelain, nonmetal, chemical industry,etc. extensively very much of this pump. In order to make everybody select for use and use column of YB serial ceramic oil pressure to fill in the pump better, basically the selecting type method will be introduced as follows now:
First, the column is filled in type and classification of the pump
This pump is divided into high-pressure pump, low-voltage large flow pump and variable pump, the same kind of specification is also divided into an ordinary pump and antiseptic acidproof pump. The high-pressure pump is suitable for sending the material of thick liquid remotely or to the high altitude; The low-voltage large flow pump is suitable for sending the body of thick liquid in a large amount steadily; The variable pump is suitable for pressing the filter of the straining machine to use with various together, this kind of pump will make the pressure improve ¢Ÿ's flow to reduce with filtering the increase of the density automatically.
Second, the column is filled in the selecting type of the pump
The YB series column is filled in the pump and used mainly in ceramic mud, water coal slurry, kaolin and nonmetal ore and suspend the transport of the liquid, can be used in the mine dreg thick liquid, food and suspend the transport of liquefaction engineering thick liquid material, magnetisable material too, transport solid content greater than 70%, variable pump mix with press person who strain have high work and energy-conserving efficiency very. Should pay attention to the following several points at the time of the selecting type:
1st, confirm the medium operating mode, the column is filled in the pump and sent and does not allow to present the big particulate matter in mediums, otherwise will cause the working trouble, should select the stainless steel column for use and fill in the pump to pollute the occasion with requirement to the iron, the acid or alkaline medium should select the antiseptic column for use and fill in the pump;
2nd, confirm the rational flow range, what the column is filled in the pump type and marked and claimed is specified flow, should consider the appropriate surplus range to select taking;
3rd, confirm the applicable pressure grade, the specified pressure of filling of the column in pump can reach 2.0- 2.5M P a, mix it by should select the variable pump for use while pressing the straining machining, losing the thick liquid should select the low-voltage pump for use, reduce the waste;
4, confirm behind the the above-mentioned parameter, according to would rather small principle more, select according to standard type for use YB serial ceramic columns fill the pump;
5, have doubt, should send a telegram to professional manufacturer, ask professional help selecting type, people of engineering.
Third, YB serial ceramic columns fill in the use of the pump
1st, install
Put the pump on the foundation, correct competence, can fix £Ÿ and can also not use the foundation screw with the foundation screw, for help, change the hydraulic oil and wash the pipeline of mud, the foundation of the pump should be higher than 10 centimeters of ground, there should be escape canals around the foundation.
2, use of pump
(1) The preparation before starting: Check the fastening situation of every part; Check fuel tank oil level, oil level height oil with fuel tank window carve line accurate, summer use N46 symbol, winter use hydraulic oil of N32 number. High-pressure pump and more than 140 pumps are employed resisting and rubing the hydraulic oil with the type. Amount of manometer checked Cheng, hydraulic pressure stand manometer 0-16M P a, air pot manometer amount Cheng should be 0-6 M P a, can't put it inside out.
(2) Start: Open cooling water; Shut the floodgate and open the switch and click and move to start it according to spraining and check the transformation of the electrical machinery, should be clockwise, can't overturn. After checking errorlessly, the starter motor and oil pump.
(3) Operate and regulate:
( 1 ) Regulating the overflow valve can regulate the oil pressure, i.e. adjustable mud pressure, regulating the good overflow valve should shoulder the locknut, it needn't move the overflow valve to shut down to make each time, the oil pressure can't be higher than 12M P a. Comments: Start to the load that the quantitative pump should be low, if two pumps are used alternatively, can start after stopping, needn't regulate the overflow valve;
( 2 ) Regulate two positions that knock into the wheel on the slippery shelf, can regulate the column to fill in the stroke;
( 3 ) Fill as column in and sealed ring wear and tear, present leak thick liquid, appropriate to transfer, keep ring closely, reach, leak the thick liquid closely, when pressing the ring and pressing to contacting and still leaking the thick liquid with the packing case, can add the spacer on the sealed ring. In order to guarantee sealed ring and column are filled in concentrically, the terminal surface makes every effort with the terminal surface on the packing case to be parallel to press at the water ring, the roughness can't be greater than 0.5mm;
( 4 ) The variable pump is worthy of using the regulation for hour with pressing the straining machine: Regulating method with operating regulating ' 1 ) .
Pump this give thick liquid pressure to set 2.0M P a dispatch from the factory, hand over thick liquid pressure to lower than 2.0M P a while being necessary, counter-clockwise device of overflow regulated, make column fill in operate most slow, handing over thick liquid pressure to up to the taking value.
(4) Shutting down
( 1 ) According to stopping according to spraining, the pump stops promptly.
( 2 ) The cooling water stop.
( 3 ) Wash the valve case with water.
3, maintenance of pump and the changing of quick-wear parts:
(1) In order to guarantee the normal running of the pump, should pay attention to the following items:
a , select clean high-quality hydraulic oil for use, filter once a month generally, three change once month, go bad, change in time;
b , pump can start and work in case of obstructed cooling water, in case porcelain quality column fill in worried and cold and worried and hot bombing, splitting and rubbery sealed ring heat, destroy, this water still plays a role in washing the column and filling in, in order to lengthen column filling in and life-span of the sealed ring;
c , sealed ring should keep high strung, in order to leak thick liquid as suitable;
d , when stopping the pump for a long time in cold season, should smoke the mud in the pump to the limit, in case the pump is frozen to crack;
e , the seal should be changed in time after being worn and torn in oil pressure system and mud pipeline;
f , should make column fill in stroke try hard long, bump into with piston cylinder end build, reversing agility;
g , when seeing the fluctuating value of mud pressure is greater than 0.2M P a from manometer of the air pot, must stop the pump, open the following valve, put and lose the mud, cover the air, unload the manometer on the air pot if necessary, wash the valve case from having ports;
h , fixed ' About one week) Check and wash the valve case;
i , human body type hold can device use after the half a year should fill the nitrogen or argon ing, fill the strength 3.0M P a of the atmospheric pressure.
(2) The changing of quick-wear parts:
( 1 ) Sealed ring: Unload and press the ring screw, handle the overflow valve, make the systematic oil pressure rise gradually, promote the piston, utilize mud pressure carry, loose sealed ring, fill column in, park pump, unload go cylinder rod with hookup screw that column fill mention, unload the sealed ring, fill the column in putting into body of pump carefully, enclose and fill in the column in the top with extremely thin copper slice, load the sealed ring onto, fasten screw described above one by one.
( 2 ) The column is filled in: The method is the same, the pump, the hookup screw unloading cylinder rod and column and filling in stop when the column is filled in and increased to the higher position. Fill column in, pull out, appear, change new column fill, fasten screw described above one by one with packing.
( 3 ) Oil pump: Lift fuel tank cap screw off, hoist out fuel tank cap £Ÿ together with the electrical machinery, this movement must prevent breaking the oil straining device and oil pipe from carefully, sucking, arranging the oil pipe on unloading and losing the oil pump, and then unload the screw of the fixed oil pump, can unload the oil pump.
Notes:
Develop valve case and change among them every part, want, make peak of the staff to be too urgent closely, do not leak the thick liquid;
Dismantle right cylinder change to collide, sell, should pay attention to, knock into, sell, must avoid cylinder gap (mouth of UNICOM of oil passage) that underpart build piston ,Otherwise can't mend oil and make piston to be unable and reversing;
The fuel tank part should keep clean frequently, can't wash the case lid and integrate one with water;
The hydraulic oil should keep absolutely clean, must check the quality of the oil regularly;
After adjusting good pressure of pump, generally don't go, adjust overflow valve, adjust system originally messy, it is apt to break down;
The abnormal sound appears, should shut down immediately, checks the trouble source, repair it.
It is the key process in the nonmetal production that the mud of high pressure sends and pigeonholes the straining machine with the board frame, the mud flows under the high pressure, wear and tear very much strong, the ordinary pump can be employed under this operating mode. In order to solve the difficult problem of this craft, column of YB serial ceramic oil pressure that mechanical Manufacturing Co., Ltd produces is filled in the pump in the favor of Xi'an, this pump exports the high, wear-resisting and of good performance, maintains and convenient advantage of the pressure, fill domestically and onlily in the pump manufacturer through ceramic column of TUV international authentication. YB serial ceramic oil pressure column fill in pump apply ceramic production to to spray dry Tamerlan transport mud first, produce ceramic spraying dry tower need Y B serial ceramic oil pressure column fill in the pump while being none of now. At present, applying to fields such as pottery, electric porcelain, nonmetal, chemical industry,etc. extensively very much of this pump. In order to make everybody select for use and use column of YB serial ceramic oil pressure to fill in the pump better, basically the selecting type method will be introduced as follows now:
First, the column is filled in type and classification of the pump
This pump is divided into high-pressure pump, low-voltage large flow pump and variable pump, the same kind of specification is also divided into an ordinary pump and antiseptic acidproof pump. The high-pressure pump is suitable for sending the material of thick liquid remotely or to the high altitude; The low-voltage large flow pump is suitable for sending the body of thick liquid in a large amount steadily; The variable pump is suitable for pressing the filter of the straining machine to use with various together, this kind of pump will make the pressure improve ¢Ÿ's flow to reduce with filtering the increase of the density automatically.
Second, the column is filled in the selecting type of the pump
The YB series column is filled in the pump and used mainly in ceramic mud, water coal slurry, kaolin and nonmetal ore and suspend the transport of the liquid, can be used in the mine dreg thick liquid, food and suspend the transport of liquefaction engineering thick liquid material, magnetisable material too, transport solid content greater than 70%, variable pump mix with press person who strain have high work and energy-conserving efficiency very. Should pay attention to the following several points at the time of the selecting type:
1st, confirm the medium operating mode, the column is filled in the pump and sent and does not allow to present the big particulate matter in mediums, otherwise will cause the working trouble, should select the stainless steel column for use and fill in the pump to pollute the occasion with requirement to the iron, the acid or alkaline medium should select the antiseptic column for use and fill in the pump;
2nd, confirm the rational flow range, what the column is filled in the pump type and marked and claimed is specified flow, should consider the appropriate surplus range to select taking;
3rd, confirm the applicable pressure grade, the specified pressure of filling of the column in pump can reach 2.0- 2.5M P a, mix it by should select the variable pump for use while pressing the straining machining, losing the thick liquid should select the low-voltage pump for use, reduce the waste;
4, confirm behind the the above-mentioned parameter, according to would rather small principle more, select according to standard type for use YB serial ceramic columns fill the pump;
5, have doubt, should send a telegram to professional manufacturer, ask professional help selecting type, people of engineering.
Third, YB serial ceramic columns fill in the use of the pump
1st, install
Put the pump on the foundation, correct competence, can fix £Ÿ and can also not use the foundation screw with the foundation screw, for help, change the hydraulic oil and wash the pipeline of mud, the foundation of the pump should be higher than 10 centimeters of ground, there should be escape canals around the foundation.
2, use of pump
(1) The preparation before starting: Check the fastening situation of every part; Check fuel tank oil level, oil level height oil with fuel tank window carve line accurate, summer use N46 symbol, winter use hydraulic oil of N32 number. High-pressure pump and more than 140 pumps are employed resisting and rubing the hydraulic oil with the type. Amount of manometer checked Cheng, hydraulic pressure stand manometer 0-16M P a, air pot manometer amount Cheng should be 0-6 M P a, can't put it inside out.
(2) Start: Open cooling water; Shut the floodgate and open the switch and click and move to start it according to spraining and check the transformation of the electrical machinery, should be clockwise, can't overturn. After checking errorlessly, the starter motor and oil pump.
(3) Operate and regulate:
( 1 ) Regulating the overflow valve can regulate the oil pressure, i.e. adjustable mud pressure, regulating the good overflow valve should shoulder the locknut, it needn't move the overflow valve to shut down to make each time, the oil pressure can't be higher than 12M P a. Comments: Start to the load that the quantitative pump should be low, if two pumps are used alternatively, can start after stopping, needn't regulate the overflow valve;
( 2 ) Regulate two positions that knock into the wheel on the slippery shelf, can regulate the column to fill in the stroke;
( 3 ) Fill as column in and sealed ring wear and tear, present leak thick liquid, appropriate to transfer, keep ring closely, reach, leak the thick liquid closely, when pressing the ring and pressing to contacting and still leaking the thick liquid with the packing case, can add the spacer on the sealed ring. In order to guarantee sealed ring and column are filled in concentrically, the terminal surface makes every effort with the terminal surface on the packing case to be parallel to press at the water ring, the roughness can't be greater than 0.5mm;
( 4 ) The variable pump is worthy of using the regulation for hour with pressing the straining machine: Regulating method with operating regulating ' 1 ) .
Pump this give thick liquid pressure to set 2.0M P a dispatch from the factory, hand over thick liquid pressure to lower than 2.0M P a while being necessary, counter-clockwise device of overflow regulated, make column fill in operate most slow, handing over thick liquid pressure to up to the taking value.
(4) Shutting down
( 1 ) According to stopping according to spraining, the pump stops promptly.
( 2 ) The cooling water stop.
( 3 ) Wash the valve case with water.
3, maintenance of pump and the changing of quick-wear parts:
(1) In order to guarantee the normal running of the pump, should pay attention to the following items:
a , select clean high-quality hydraulic oil for use, filter once a month generally, three change once month, go bad, change in time;
b , pump can start and work in case of obstructed cooling water, in case porcelain quality column fill in worried and cold and worried and hot bombing, splitting and rubbery sealed ring heat, destroy, this water still plays a role in washing the column and filling in, in order to lengthen column filling in and life-span of the sealed ring;
c , sealed ring should keep high strung, in order to leak thick liquid as suitable;
d , when stopping the pump for a long time in cold season, should smoke the mud in the pump to the limit, in case the pump is frozen to crack;
e , the seal should be changed in time after being worn and torn in oil pressure system and mud pipeline;
f , should make column fill in stroke try hard long, bump into with piston cylinder end build, reversing agility;
g , when seeing the fluctuating value of mud pressure is greater than 0.2M P a from manometer of the air pot, must stop the pump, open the following valve, put and lose the mud, cover the air, unload the manometer on the air pot if necessary, wash the valve case from having ports;
h , fixed ' About one week) Check and wash the valve case;
i , human body type hold can device use after the half a year should fill the nitrogen or argon ing, fill the strength 3.0M P a of the atmospheric pressure.
(2) The changing of quick-wear parts:
( 1 ) Sealed ring: Unload and press the ring screw, handle the overflow valve, make the systematic oil pressure rise gradually, promote the piston, utilize mud pressure carry, loose sealed ring, fill column in, park pump, unload go cylinder rod with hookup screw that column fill mention, unload the sealed ring, fill the column in putting into body of pump carefully, enclose and fill in the column in the top with extremely thin copper slice, load the sealed ring onto, fasten screw described above one by one.
( 2 ) The column is filled in: The method is the same, the pump, the hookup screw unloading cylinder rod and column and filling in stop when the column is filled in and increased to the higher position. Fill column in, pull out, appear, change new column fill, fasten screw described above one by one with packing.
( 3 ) Oil pump: Lift fuel tank cap screw off, hoist out fuel tank cap £Ÿ together with the electrical machinery, this movement must prevent breaking the oil straining device and oil pipe from carefully, sucking, arranging the oil pipe on unloading and losing the oil pump, and then unload the screw of the fixed oil pump, can unload the oil pump.
Notes:
Develop valve case and change among them every part, want, make peak of the staff to be too urgent closely, do not leak the thick liquid;
Dismantle right cylinder change to collide, sell, should pay attention to, knock into, sell, must avoid cylinder gap (mouth of UNICOM of oil passage) that underpart build piston ,Otherwise can't mend oil and make piston to be unable and reversing;
The fuel tank part should keep clean frequently, can't wash the case lid and integrate one with water;
The hydraulic oil should keep absolutely clean, must check the quality of the oil regularly;
After adjusting good pressure of pump, generally don't go, adjust overflow valve, adjust system originally messy, it is apt to break down;
The abnormal sound appears, should shut down immediately, checks the trouble source, repair it.
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