CN108918103A - A kind of waterpower control Dynamic Characteristics of Non-Return Valve test macro and test method - Google Patents
A kind of waterpower control Dynamic Characteristics of Non-Return Valve test macro and test method Download PDFInfo
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- CN108918103A CN108918103A CN201810346140.2A CN201810346140A CN108918103A CN 108918103 A CN108918103 A CN 108918103A CN 201810346140 A CN201810346140 A CN 201810346140A CN 108918103 A CN108918103 A CN 108918103A
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Abstract
The present invention relates to a kind of waterpower control Dynamic Characteristics of Non-Return Valve test macro and test methods.Test macro includes test main line, secondary water-supply pipeline, bypass water return pipeline and feed cistern, the first water pump being sequentially arranged along water (flow) direction is installed on test main line, tested check-valves, first pressure sensor, Pneumatic gate valve and flowmeter, second water pump and second pressure sensor are installed on secondary water-supply pipeline, electric switching valve is installed on bypass water return pipeline, test main line inlet and outlet, the import of secondary water-supply pipeline and the outlet of bypass water return pipeline access feed cistern, secondary water-supply tube outlet joint test main line and be located at Pneumatic gate valve input end, it bypasses water return pipeline import joint test main line and is located at the first pump outlet.The present invention can simulate the adverse current closed state and water hammer effect of check-valves under pumping pipe-line system real working condition.The configuration of the present invention is simple carries out switching it is not necessary that more valves are synchronous when test, and measuring accuracy is high.
Description
Technical field
The invention belongs to check-valves technical fields, are specifically related to a kind of waterpower control Dynamic Characteristics of Non-Return Valve test macro
And test method.
Background technique
Check-valves be it is a kind of realize opening and closing by pressure medium, and medium can only the valve that flows of single direction
Door, effect is to prevent medium reverse flow, and the pump and motor group before protecting valve are not damaged.Check-valves is in pump tubing length system
The impact of middle generation, caused by head loss there is very strong Unpredictability, while the impact characteristics of check-valves must be with pump
It send system to be mutually matched, to select the check-valves that will not be impacted, Design of Pump Station personnel must analytical calculation pumping system
The backward acceleration that fluid column generates after system termination of pumping, therefore the dynamic characteristic of check-valves is that pumping system will consider when selecting check-valves
Principal element.In the prior art without Dynamic Characteristics of Non-Return Valve test specific implementation method, at present designer usually according to
Liquid backward acceleration is calculated by computer simulation, or check-valves reverse flow is carried out using multiple branch circuit pipe network system is built
Qualification test, such as patent application 201410648529.4 disclose a kind of nuclear leve check-valves dynamic countercurrent experimental rig, the examination
Experiment device changes the flow direction of fluids within pipes by switching supply lines valve, makes the effect of check-valves retrograde fluid in official road
Lower closing realizes the purpose of test valve performance, needs more deck valve door Simultaneous Switchings, synchronism in pipe network to be difficult to during test
It realizes, test accuracy not can guarantee.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of waterpower control Dynamic Characteristics of Non-Return Valve test macro and
Test method.
In order to achieve the object of the present invention, the invention adopts the following technical scheme：
A kind of waterpower control Dynamic Characteristics of Non-Return Valve test macro, including test main line, secondary water-supply pipeline, bypass back
Water lines and feed cistern, it is described to test the first water pump, the tested non-return for being equipped on main line and being sequentially arranged along water (flow) direction
Valve, first pressure sensor, Pneumatic gate valve and flowmeter are equipped with the second water pump and second on the secondary water-supply pipeline
Pressure sensor is equipped with electric switching valve, the test main line inlet and outlet, secondary water-supply pipe on the bypass water return pipeline
Road import and the outlet of bypass water return pipeline access the feed cistern, and the secondary water-supply tube outlet connects the test master
Pipeline and it is located at Pneumatic gate valve input end, the bypass water return pipeline import connects the test main line and positioned at described first
Pump outlet.
Further, the tested check valve inlet end is equipped with third pressure sensor.
Further, first water pump is variable frequency pump.
Further, which further includes for acquiring the first pressure sensor, second pressure sensor and third
The data acquisition module of pressure sensor pressure signal, the Pneumatic gate valve closing velocity signal and the flowmeter flow signal
Block.
A kind of test method based on the waterpower control Dynamic Characteristics of Non-Return Valve test macro, includes the following steps：
Step 1, the second water pump in electric switching valve and secondary water-supply pipeline on bypass water return pipeline is closed, is opened
First water pump provides the water flow of forward flow to master trip pipeline and fully opens tested check-valves, at this time data acquisition module
Acquire the initial flow rate v that the flow measurement obtains0；
Step 2, start the second water pump in secondary water-supply pipeline and additional flow, the secondary water-supply pipeline are provided for system
The hydraulic pressure of offer is 0.1~0.2MPa bigger than test main line hydraulic pressure, and the water flow of test main line and secondary water-supply pipeline is converged simultaneously
Enter feed cistern through Pneumatic gate valve, flowmeter outflow；
Step 3, in the case that the second water pump is opened on holding secondary water-supply pipeline, Pneumatic gate valve is first closed, side is then turned on
Electric switching valve in logical water return pipeline, prevents medium flow forward in test main line, and test main line generates reverse flow
And tested check-valves is impacted, data acquisition module acquires Pneumatic gate valve by first pressure sensor and tests master during the shutdown process
Pipeline inner pressure P t at any time1The signal of variation；
Step 4, Pneumatic gate valve is adjusted to be closed at different rates to obtain and generate different fluids in test main line
Backward acceleration v1, data acquisition module by first pressure sensor acquire under different Pneumatic gate valve closing velocities test be responsible for
Pressure P t at any time in road1The signal of variation；According to pressure P t at any time in test main line1The signal of variation, data processing mould
Block calculates different fluid backward acceleration v1Under corresponding check-valves inverted speed v2, generate tested Dynamic Characteristics of Non-Return Valve and ring
Answer curve v1-v2。
The beneficial effects of the present invention are：
(1) present invention can accurately change the initial flow rate v of test(ing) medium in master trip pipeline by variable frequency pump0, simultaneously
Different backward acceleration v can be provided for pilot system by setting different closing velocities to Pneumatic gate valve1, in addition pneumatically
Gate valve close after can after tested check-valves moment generate reverse flow, to realize simulation pumping pipe-line system real working condition
The adverse current closed state and water hammer effect of lower check-valves.The present invention is more bonded the true applying working condition of check-valves, and structure is simple,
Without the synchronous progress switching of more valves when test, and measuring accuracy is high.
(2) present invention can by be tested set first pressure sensor real-time monitoring non-return downstream pressure after check-valves with
The situation of change of time generates dynamic pressure profile P-t1, the intuitive action performance for reflecting tested check-valves.Pass through first pressure
Sensor, third pressure sensor can intuitively understand the pressure difference variation of tested check-valves rear and front end.It is described
(3) test of unified valve can be achieved in the present invention, and different bore identical type waterpower controls can be achieved in the present invention
The measurement of check-valves product dynamic characteristic, while the dynamic characteristic of identical bore variety classes waterpower control check-valves can be carried out
Comparative study, generate dynamic characteristic compare response curve, provided for designer in pumping system check-valves type selecting refer to and
Theoretical foundation.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is pressure P t at any time in test main line1The curve graph of variation.
Fig. 3 is tested Dynamic Characteristics of Non-Return Valve response curve v1-v2Figure.
Attached meaning marked in the figure is as follows：
10- tests main line 11- the first water pump 12- and is tested check-valves 13- first pressure sensor
14- Pneumatic gate valve 15- flowmeter 16- third pressure sensor 20- secondary water-supply pipeline
21- the second water pump 22- second pressure sensor 30- bypasses water return pipeline
31- electric switching valve 40- feed cistern 50- data acquisition module
Specific embodiment
More specific detail is made to technical solution of the present invention below with reference to embodiment：
As shown in Figure 1：Waterpower of the present invention controls Dynamic Characteristics of Non-Return Valve test macro, including test main line 10, secondary
Water supply pipe 20 bypasses water return pipeline 30, feed cistern 40 and data acquisition module 50, is equipped on the test main line 10
The first water pump 11 that the variable frequency pump being sequentially arranged along water (flow) direction is constituted, third pressure sensor 16, tested check-valves 12, the
One pressure sensor 13, Pneumatic gate valve 14 and flowmeter 15, be equipped on the secondary water-supply pipeline 20 second water pump 21 with
And second pressure sensor 22, electric switching valve 31 is installed on the bypass water return pipeline 30, the test main line 10 into
Outlet, 20 import of secondary water-supply pipeline and the outlet of bypass water return pipeline 30 access the feed cistern 40, the secondary water-supply
The outlet of pipeline 20 connects the test main line 10 and is located at 14 input end of Pneumatic gate valve, and 30 import of bypass water return pipeline connects
It connects the test main line 10 and is located at 11 outlet end of the first water pump.
The data acquisition module 50 is for acquiring the first pressure sensor 13, second pressure sensor 22 and the
Three pressure sensors, 16 pressure signal, the acquisition 14 closing velocity signal of Pneumatic gate valve and acquisition 15 flow of flowmeter
Signal.
Based on the test method of above-mentioned waterpower control Dynamic Characteristics of Non-Return Valve test macro, include the following steps：
Step 1, the second water in electric switching valve 31 and secondary water-supply pipeline 20 on bypass water return pipeline 30 is closed
Pump 21 opens the first water pump 11 and provides the water flow of forward flow to master trip pipeline 10 and fully open tested check-valves 12,
Data acquisition module 50 acquires the initial flow rate v that the flowmeter 15 measures at this time0；
Step 2, start the second water pump 21 in secondary water-supply pipeline 20 and additional flow, the secondary water-supply are provided for system
The hydraulic pressure that pipeline 20 provides is 0.1~0.2MPa bigger than test 10 hydraulic pressure of main line, the test main line 10 and secondary water-supply pipe
The water flow on road 20 is converged and enters feed cistern 40 through Pneumatic gate valve 14, the outflow of flowmeter 15；
Step 3, it keeps on secondary water-supply pipeline 20 in the case where the unlatching of second water pump 22, first closing Pneumatic gate valve 14, then
The electric switching valve 31 in bypass water return pipeline 30 is opened, medium flow forward in test main line 10 is prevented, tests main line
10 generate reverse flow and impact tested check-valves 12, and data acquisition module 50 acquires pneumatic brake by first pressure sensor 13
Valve 14 tests in main line 10 pressure P t at any time during the shutdown process1The signal of variation, as shown in Figure 2；
Step 4, adjust Pneumatic gate valve 14 close at different rates with obtain test main line 10 in generate it is different
Fluid backward acceleration v1, data acquisition module 50 acquires different 14 closing velocities of Pneumatic gate valve by first pressure sensor 13
Pressure P t at any time in lower test main line 101The signal of variation；According to pressure P t at any time in test main line 101Variation
Signal, data processing module 50 calculate different fluid backward acceleration v1Under corresponding check-valves inverted speed v2, generate tested
12 dynamic characteristic response curve v of check-valves1-v2, as shown in Figure 3.
The fluid backward acceleration v1Calculation formula it is as follows：
v1=v0/t2
Wherein t2It is related to the closing velocity of Pneumatic gate valve for the shut-in time of Pneumatic gate valve；
The check-valves inverted speed v2Calculation formula it is as follows：
v2=(PD-PC)g/a
Wherein PCIndicate that the flap of tested check-valves hits pressure when valve seat causes impact to generate water hammer, C in corresponding diagram 2
The pressure value of point；PDIndicate water hammer pressure, the pressure value of D point in corresponding diagram 2；G indicates acceleration of gravity；A indicate velocity of wave and with
The material of pipeline is related.
Curve A point in Fig. 2：After Pneumatic gate valve is closed, medium stops flow forward in test lead road, and tested check-valves is opened
Begin to close；B point：Medium starts to carry out reverse flow；C point：Start to generate water hammer；D point：Tested check-valves completely closes.
Claims (5)
1. a kind of waterpower controls Dynamic Characteristics of Non-Return Valve test macro, it is characterised in that：Including testing main line (10), secondary confession
Water lines (20) bypass water return pipeline (30) and feed cistern (40), are equipped on the test main line (10) along water flow side
To the first water pump (11) being sequentially arranged, tested check-valves (12), first pressure sensor (13), Pneumatic gate valve (14) and stream
Meter (15) is equipped with the second water pump (21) and second pressure sensor (22) on the secondary water-supply pipeline (20), described
It is equipped with electric switching valve (31) in bypass water return pipeline (30), test main line (10) inlet and outlet, secondary water-supply pipeline
(20) import and bypass water return pipeline (30) outlet access the feed cistern (40), secondary water-supply pipeline (20) outlet
It connects the test main line (10) and is located at Pneumatic gate valve (14) input end, bypass water return pipeline (30) import connects institute
It states test main line (10) and is located at the first water pump (11) outlet end.
2. waterpower as described in claim 1 controls Dynamic Characteristics of Non-Return Valve test macro, it is characterised in that：The tested non-return
Valve (12) input end is equipped with third pressure sensor (16).
3. waterpower as described in claim 1 controls Dynamic Characteristics of Non-Return Valve test macro, it is characterised in that：First water pump
It (11) is variable frequency pump.
4. waterpower as claimed in claim 2 controls Dynamic Characteristics of Non-Return Valve test macro, it is characterised in that：The system further includes
For acquiring the first pressure sensor (13), second pressure sensor (22) and third pressure sensor (16) pressure letter
Number, the data acquisition module (50) of the Pneumatic gate valve (14) closing velocity signal and the flowmeter (15) flow signal.
5. a kind of test side based on the described in any item waterpower control Dynamic Characteristics of Non-Return Valve test macros of Claims 1 to 4
Method, it is characterised in that include the following steps：
Step 1, second in electric switching valve (31) and secondary water-supply pipeline (20) in bypass water return pipeline (30) is closed
Water pump (21) opens the first water pump (11) and to master trip pipeline (10) provides the water flow of forward flow and by tested check-valves (12)
It fully opens, data acquisition module (50) acquires the initial flow rate v that the flowmeter (15) measures at this time0；
Step 2, start the second water pump (21) in secondary water-supply pipeline (20) and additional flow, the secondary water-supply are provided for system
The hydraulic pressure that pipeline (20) provides is 0.1~0.2MPa bigger than test main line (10) hydraulic pressure, tests main line (10) and secondary water-supply
The water flow of pipeline (20) is converged and enters feed cistern (40) through Pneumatic gate valve (14), flowmeter (15) outflow；
Step 3, first closing Pneumatic gate valve (14) on secondary water-supply pipeline (20) in the case where the second water pump (22) unlatching is kept,
The electric switching valve (31) being then turned in bypass water return pipeline (30) prevents test main line (10) interior medium flow forward, examination
It tests main line (10) to generate reverse flow and impact tested check-valves (12), data acquisition module (50) is sensed by first pressure
Device (13) acquires Pneumatic gate valve (14) and tests main line (10) interior pressure P t at any time during the shutdown process1The signal of variation；
Step 4, adjusting Pneumatic gate valve (14) is closed different to obtain the generation in test main line (10) at different rates
Fluid backward acceleration v1, data acquisition module (50) acquires different Pneumatic gate valves (14) by first pressure sensor (13) and closes
It closes under speed and tests main line (10) interior pressure P t at any time1The signal of variation；At any time according to test main line (10) interior pressure P
Between t1The signal of variation, data processing module (50) calculate different fluid backward acceleration v1Under corresponding check-valves it is reversely fast
Spend v2, generate tested check-valves (12) dynamic characteristic response curve v1-v2。
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| CN201810346140.2A CN108918103B (en) | 2018-04-18 | 2018-04-18 | Hydraulic control check valve dynamic characteristic test system and test method |
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| CN201810346140.2A CN108918103B (en) | 2018-04-18 | 2018-04-18 | Hydraulic control check valve dynamic characteristic test system and test method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112986099A (en) * | 2021-03-30 | 2021-06-18 | 中国电建集团西北勘测设计研究院有限公司 | Water supply pressurizing device for ultrahigh water head permeability characteristic test water head and operation method |
| CN114528782A (en) * | 2022-02-21 | 2022-05-24 | 博纳斯威阀门股份有限公司 | Intelligent water diversion and regulation experimental device and application thereof |
| CN115655701A (en) * | 2022-10-24 | 2023-01-31 | 国检测试控股集团上海有限公司 | Method and system for testing functions of flow-limiting check valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112986099A (en) * | 2021-03-30 | 2021-06-18 | 中国电建集团西北勘测设计研究院有限公司 | Water supply pressurizing device for ultrahigh water head permeability characteristic test water head and operation method |
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