CN206801840U - Pump cavitation surplus Auto-Test System - Google Patents
Pump cavitation surplus Auto-Test System Download PDFInfo
- Publication number
- CN206801840U CN206801840U CN201720452198.6U CN201720452198U CN206801840U CN 206801840 U CN206801840 U CN 206801840U CN 201720452198 U CN201720452198 U CN 201720452198U CN 206801840 U CN206801840 U CN 206801840U
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- China
- Prior art keywords
- pump
- tank
- valve
- electric gate
- switch valve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of pump cavitation surplus Auto-Test System, including：Drain tank, water tank and the flow adjustment pipe of connection drain tank and water tank, are provided with electric gate valve, flowmeter, pneumatic control valve on the pipeline；Pumping tank on water tank；Vavuum pump and vavuum pump is connected with pumping tank, exhaust pipe and its bye-pass equipped with switch valve；The motor electrically connected with vavuum pump；Electric gate valve and pressure transmitter and the inlet pipeline connected with the water inlet of tested water pump are installed；The outlet pipeline connected with the delivery port of tested water pump, electric gate valve, pressure transmitter and switch valve are installed on the pipeline；Be integrated with data acquisition module and data control block and the observing and controlling cabinet being connected by signal wire with parts such as foregoing electric gate valve, pressure transmitters, networking output interface be additionally provided with observing and controlling cabinet, for the industrial computer communication equipped with test program.The utility model can automatically, quickly and accurately test pump cavitation surplus.
Description
Technical field
The utility model belongs to parallel water pump technical field, and in particular to a kind of pump cavitation surplus Auto-Test System.
Background technology
Pump cavitation surplus test be one of basic work of testing water pump, be water pump whole production procedure in
Important part.Water pump in the course of the work, often produces cavitation phenomenons, so as to right because of fluid local pressure decline in pump
Pump part or even pump case have detrimental effect, and water pump cisco unity malfunction can be caused when serious, and the net positive suction head of pump is gone back at present
It can not be tried to achieve by theoretical calculation.
At present, pump cavitation experimental test gradually lowers pump mostly by adjusting the valve being arranged on inlet pipeline
Inlet pressure, while the valve being arranged on outlet pipeline is adjusted, to keep flow constant, treat that lift decrease beyond 3%, then
Cavitation experiment terminates.Whole experiment process need to adjust two parameters of inlet pressure and flow simultaneously, and not only measurement error is big, efficiency
It is low, and tester's labor intensity is big.
The content of the invention
The purpose of this utility model is the precision and automaticity for improving the test of pump cavitation surplus, on overcoming
The defects of stating prior art.In order to realize this purpose, tested automatically the utility model proposes a kind of pump cavitation surplus and be
System, it includes components described below：
(1) drain tank, water tank and the flow adjustment pipe of connection drain tank and water tank, pacify on flow adjustment pipe
Equipped with electric gate valve, flowmeter, pneumatic control valve,
(2) the pumping tank being arranged on the water tank；
(3) vavuum pump and by vavuum pump and the exhaust pipe that connects of pumping tank, switch valve is equipped with exhaust pipe,
A straight open to atmosphere bye-pass is additionally provided with exhaust pipe, switch valve is also equipped with bye-pass；
(4) motor electrically connected with the vavuum pump；
(5) inlet pipeline connected with the water inlet of tested water pump, electric gate valve is provided with inlet pipeline and pressure becomes
Send device；
(6) outlet pipeline connected with the delivery port of tested water pump, electric gate valve, pressure inverting are installed on outlet pipeline
Device and switch valve；
(7) observing and controlling cabinet, it passes through signal wire and foregoing each electric gate valve, pressure transmitter, switch valve, flowmeter, pneumatic
Regulating valve is connected, and data acquisition module and data control block are integrated with observing and controlling cabinet, and network output is additionally provided with observing and controlling cabinet and is connect
Mouthful.
On the basis of above-mentioned technical proposal, the present invention can add following technological means, preferably to solve the present invention
Technical problem to be solved：
Switch valve is also associated with the pumping tank, it is to give pumping tank tonifying Qi that it, which is acted on,.
Further, temperature transmitter is also equipped with the water tank, for measuring the temperature of a liquid in real time.
The utility model has following beneficial effects：
Equipped with test program industrial computer coordinate under, the utility model can automatically, quickly and accurately test pump cavitation
Surplus, so as to drastically increase the testing efficiency of pump cavitation surplus and measuring accuracy, the work for reducing tester is strong
Degree, improve the working environment of tester.
Brief description of the drawings
Fig. 1 is the structural representation of one embodiment of the present utility model；
Fig. 2 is the method flow diagram tested with the utility model pump cavitation surplus；
Fig. 3 is the test result data processing figure in one embodiment of the present utility model；
Fig. 4 is the pump cavitation trial curve figure in one embodiment of the present utility model.
Embodiment
One embodiment of the present utility model is discussed in detail below in conjunction with accompanying drawing.
As shown in figure 1, a kind of pump cavitation surplus Auto-Test System, it includes components described below：
(1) drain tank 1, water tank 2 and the flow adjustment pipe 3 for connecting drain tank 1 with water tank 2, Flow-rate adjustment
Electric gate valve 301, flowmeter 302, pneumatic control valve 303 are sequentially installed with pipeline 3.The main function of electric gate valve 301 is,
When needing to overhaul pipeline or instrument, for blocking the current in flow adjustment pipe 3.Flowmeter 302 is used to measure tested water
The flow of pump 10.Pneumatic control valve 303 is used to adjust the water-carrying capacity in flow adjustment pipe 3.Temperature is also equipped with water tank 2
Transmitter 201, for measuring the temperature of a liquid in real time.
(2) be arranged on the water tank 2 on pumping tank 4, be evacuated tank 4 on be also associated with switch valve 401, its act on be to
It is evacuated the tonifying Qi of tank 4.
(3) vavuum pump 5 and by vavuum pump 5 and the exhaust pipe 6 that connects of pumping tank 4, equipped with opening on exhaust pipe 6
Close valve 601；A straight open to atmosphere bye-pass 602 is additionally provided with exhaust pipe 6, switch valve 603 is housed on bye-pass 602；
(4) motor 7 electrically connected with the vavuum pump 5, vavuum pump 5 are driven by motor 7, open opening on exhaust pipe 6
Valve 601 is closed, then pumping tank 4 can be evacuated, so as to reduce the pressure of tested pump intake；When on opening bye-pass 602
Switch valve 603, close exhaust pipe 6 on switch valve 601 when, vavuum pump 5 does not come into operation, and the present embodiment passes through the two
The switching of switch valve and avoid frequent starting, stop motor 7.
(5) inlet pipeline 8 connected with the water inlet of tested water pump 10, the He of electric gate valve 801 is installed on inlet pipeline 8
Pressure transmitter 802；The current that electric gate valve 801 is blocked when being mainly used in mounting and dismounting water pump 10 to be measured in inlet pipeline 8,
Pressure transmitter 802 is used for the pressure for measuring the water inlet of tested water pump 10, and pressure signal is changed into electric signal.
(6) outlet pipeline 9 connected with the delivery port of tested water pump 10, be provided with outlet pipeline 9 electric gate valve 901,
Pressure transmitter 902 and switch valve 903.The main function of electric gate valve 901 is, when needing to overhaul pipeline or instrument, to be used for
The current blocked in outlet pipeline 9.Pressure transmitter 902 is used for the pressure for measuring the water outlet of tested water pump 10, and will pressure
Force signal is changed into electric signal.Switch valve 903 is used to during testing be vented to outlet pipeline 9.
(7) observing and controlling cabinet, it passes through signal wire and foregoing each electric gate valve, pressure transmitter, switch valve, flowmeter, pneumatic
Regulating valve is connected, and data acquisition module and data control block are integrated with observing and controlling cabinet, and network output is additionally provided with observing and controlling cabinet and is connect
Mouthful.By the networking output interface on observing and controlling cabinet, data acquisition module and data control block in observing and controlling cabinet can with equipped with
The industrial computer communication of test program, so that the utility model can be completed to test work accordingly under the cooperation of industrial computer
Make.
More than, the concrete structure of one embodiment of the present utility model is described, below, is further described the utility model
Operation principle and test process.
In the test preparatory stage, first tested water pump 10 is connected with pump motor 11 by torque rotary speed sensor 12, water
Pump motor 11 drives water pump 10 to operate after starting.During experiment, water is discharged from the delivery port of tested water pump 10, through outlet pipeline
9 enter drain tank 1, then flow into water tank 2 through flow adjustment pipe 3, form a closed system.Test pump cavitation surplus
When, start motor 7, open the switch valve 601 on exhaust pipe 6, the switch valve 603 closed on bye-pass 602, vavuum pump 2 is thrown
Enter to use, pumping tank 4 is evacuated, so as to reach the purpose of the tested pump intake pressure of regulation, when tested water feeding of water pump
Mouth pressure value is reduced when causing water pump generation cavitation, and the cavitation experiment of the operating point terminates.Entering the examination of next operating point
Before testing, the switch valve 601 on closing exhaust pipe 6, the switch valve 603 on bye-pass 602 is opened, then vavuum pump 5 does not put into and made
With.In whole test process, foregoing each electric gate valve, pressure transmitter, switch valve, flowmeter, the signal of pneumatic control valve
Line is linked into the data acquisition module of observing and controlling cabinet, and the signal of above-mentioned each transmitter is input in industrial computer by data acquisition module
Carry out data processing.According to the instruction sent after industrial computer processing data, data control block can control each electric gate valve, switch
The working condition of valve and pneumatic control valve.
It is, in general, that before pump cavitation experiment is carried out, advanced water-filling pump performance test (abbreviation performance test), leads to
One group of flow, lift data can be obtained by crossing performance test.When carrying out cavitation experiment, flow, lift data can be passed through multinomial
Formula is fitted to a flow-lift curve Q-H, and the curve is translated downwards into 3% (even if also each on the curve along ordinate
Put height value H corresponding in a coordinate system to decline 3%), obtain cavitation experiment judgment standard curve Q-H3.In addition, in performance
During experiment, one group of flow, valve opening data, the i.e. corresponding valve opening of each target flow value can be also obtained
Value, these data are also useful to cavitation experiment.In a word, the present invention makes full use of performance test results, can improve cavitation
Test efficiency, save regulating time.
The utility model net positive suction head test system, unit fixed on water pump suction pressure is reduced to the pumping of pumping tank using vavuum pump
Mode, whole procedures system pipe resistance of testing keep constant, and system tends to dynamic equilibrium.Therefore, after starting vavuum pump, industry control
Machine starts each transmitter reading of continuous acquisition, and calculates the lift value H of water pump in real timea.Meanwhile industrial computer is according to Q-H3It is bent
Line expression formula and the actual flow value collected in real time, calculate corresponding lift determining reference value H in real time by interpolationt.With
Pumping of the vavuum pump to pumping tank, vacuum in tank is evacuated and gradually rises, unit fixed on water pump suction pressure gradually lowers, and survey calculation obtains
The lift value H arrivedaIt is gradually reduced；And meter readings are also gradually reduced, then interpolation calculation is drawn benchmark lift value HtAlso it is gradual
Reduce.Two lift value sizes of industrial computer real time contrast, until working as Ha≤HtWhen, then the cavitation experiment of the operating point terminates.Then
Into the experiment of next operating mode.
After having tested an operating point, pumping tank has formed vacuum state, therefore is entering next operating point
Cavitation experiment before, pumping tank need to be carried out tonifying Qi to its it is internal reach atmospheric pressure state, during tonifying Qi, vavuum pump must
It must stop to pumping tank pumping.For the present embodiment, by switching switch valve 601 and bye-pass on exhaust pipe 6
The working condition of switch valve 603 on 602, and frequent starting vavuum pump is avoided, that is, open switch valve 601, closing switch valve
603, vavuum pump is evacuated to pumping tank；Closing switch valve 601, opens switch valve 603, and vavuum pump stops taking out pumping tank
Gas, equivalent to stopping vaccum pump motor.
Operation principle of the present utility model is described above, below in conjunction with its specific job step of accompanying drawing；
A kind of method that pump cavitation surplus test system with shown in Fig. 1 is tested pump cavitation surplus, its
Workflow is as shown in Fig. 2 specifically include following step：
Step 1, industrial computer is according to performance test results, with fitting of a polynomial flow-lift curve Q-H, and will be whole bent
Line obtains Q-H along the translation 3% downwards of ordinate direction3Curve；
Step 2, the opening value of the given pneumatic control valve 303 of result is recorded according to performance test；
Step 3, after pump cavitation surplus test system is stable, start vavuum pump 5；
Step 4, the switch valve 601 of exhaust pipe 6 is opened, the switch valve 603 closed on bye-pass 602, vavuum pump 5 is thrown
Enter to use；
Step 5, continuous acquisition pressure transmitter 802,902, flowmeter 302, the signal of torque rotary speed sensor 12, and
Calculate lift value H in real timea；
Step 6, industrial computer is according to Q-H3Curve representation formula and the actual flow value collected in real time, it is real-time by interpolation
Lift determining reference value H corresponding to calculatingt；
Step 7, real time contrast HaAnd HtValue；
Step 8, work as Ha≤HtWhen, the switch valve 601 of exhaust pipe 6 is closed, opens the switch valve 603 on bye-pass 602；
Step 9, the switch valve 401 on pumping tank 4 is opened, tonifying Qi is carried out to pumping tank, tonifying Qi terminates rear closing switch valve
401；
Step 10, into next operating mode experimental tests, the second to the 9th step is repeated, until all operating points have been tested
Finish；
Step 11, draws flow-net positive suction head Q-NPSH curves, and the curve is as shown in Figure 4；
Step 12, one group of flow targets operating mode value to be measured is substituted into Q-NPSH curve representation formulas, then can try to achieve one group
Net positive suction head value.
The test of pump cavitation surplus can be completed by above-mentioned 12 steps, test result is after data processing, such as
Shown in Fig. 3.
Claims (3)
1. a kind of pump cavitation surplus Auto-Test System, it includes components described below：
(1) drain tank, water tank and the flow adjustment pipe of connection drain tank and water tank, are provided with flow adjustment pipe
Electric gate valve, flowmeter, pneumatic control valve；
(2) the pumping tank being arranged on the water tank；
(3) vavuum pump and by vavuum pump and the exhaust pipe that connect of pumping tank, is equipped with switch valve, pumping on exhaust pipe
A straight open to atmosphere bye-pass is additionally provided with pipeline, switch valve is also equipped with bye-pass；
(4) motor electrically connected with the vavuum pump；
(5) inlet pipeline connected with the water inlet of tested water pump, electric gate valve and pressure transmitter are installed on inlet pipeline；
(6) outlet pipeline connected with the delivery port of tested water pump, be provided with outlet pipeline electric gate valve, pressure transmitter and
Switch valve；
(7) observing and controlling cabinet, it passes through signal wire and foregoing each electric gate valve, pressure transmitter, switch valve, flowmeter, pneumatic regulation
Valve connects, and is integrated with data acquisition module and data control block in observing and controlling cabinet, networking output interface is additionally provided with observing and controlling cabinet.
2. pump cavitation surplus Auto-Test System as claimed in claim 1, it is characterised in that：It is also connected with the pumping tank
There is switch valve, it is to give pumping tank tonifying Qi that it, which is acted on,.
3. pump cavitation surplus Auto-Test System as claimed in claim 1 or 2, it is characterised in that：On the water tank also
Temperature transmitter is installed, for measuring the temperature of a liquid in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720452198.6U CN206801840U (en) | 2017-04-26 | 2017-04-26 | Pump cavitation surplus Auto-Test System |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720452198.6U CN206801840U (en) | 2017-04-26 | 2017-04-26 | Pump cavitation surplus Auto-Test System |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206801840U true CN206801840U (en) | 2017-12-26 |
Family
ID=60738469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720452198.6U Withdrawn - After Issue CN206801840U (en) | 2017-04-26 | 2017-04-26 | Pump cavitation surplus Auto-Test System |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206801840U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968934A (en) * | 2017-04-26 | 2017-07-21 | 广东肯富来泵业股份有限公司 | Pump cavitation surplus Auto-Test System and its method |
| CN109026648A (en) * | 2018-08-27 | 2018-12-18 | 天津航天瑞莱科技有限公司 | A kind of medium volume flow regulator pumped at class products export |
| CN116146501A (en) * | 2023-01-03 | 2023-05-23 | 广州市昕恒泵业制造有限公司 | Control system and method capable of reducing pump cavitation and changing pumping medium characteristics |
-
2017
- 2017-04-26 CN CN201720452198.6U patent/CN206801840U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968934A (en) * | 2017-04-26 | 2017-07-21 | 广东肯富来泵业股份有限公司 | Pump cavitation surplus Auto-Test System and its method |
| CN106968934B (en) * | 2017-04-26 | 2018-12-18 | 广东肯富来泵业股份有限公司 | Pump cavitation surplus Auto-Test System and its method |
| CN109026648A (en) * | 2018-08-27 | 2018-12-18 | 天津航天瑞莱科技有限公司 | A kind of medium volume flow regulator pumped at class products export |
| CN116146501A (en) * | 2023-01-03 | 2023-05-23 | 广州市昕恒泵业制造有限公司 | Control system and method capable of reducing pump cavitation and changing pumping medium characteristics |
| CN116146501B (en) * | 2023-01-03 | 2024-01-12 | 广州市昕恒泵业制造有限公司 | Control system and method capable of reducing pump cavitation and changing pumping medium characteristics |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171226 Effective date of abandoning: 20181218 |
|
| AV01 | Patent right actively abandoned |