Water pump anti-interference test method

Abstract

The invention belongs to the technical field of water pumps, and discloses a water pump anti-interference test method, which comprises a water pump hedging test method, and the water pump hedging test method comprises the following steps: installing a tested water pump, so that the input end of the tested water pump is connected with a second water delivery end, and the output end of the tested water pump is connected with a first stop valve; carrying out an output end plugging test and a hedging test; the output end plugging test comprises the steps of confirming that a first stop valve and a second stop valve are opened, and confirming that a water pump and a tested water pump are opened; when the first stop valve is closed, the blocking condition of the output end of the tested water pump can be simulated, and the pressure and flow change of the output end of the tested water pump in the closing process is recorded; the hedging test comprises the steps of confirming that a first stop valve and a second stop valve are opened, and confirming that a water pump and a tested water pump are opened; the device can be used for simulating the condition that the water flow is gradually increased in the hedging process, and recording the pressure and flow change of the output end of the tested water pump in the closing process.

Description

Technical Field

[0001] The invention relates to the technical field of water pumps, and in particular to an anti-interference test method for water pumps. Background Art

[0002] When the water pump is installed, there is a situation where the medium flow direction is the same as or opposite to the actual direction of the water pump, and there is a situation where the liquid medium is insufficient. The above situations will affect the working state of the water pump.

[0003] In order to test the anti-interference ability of the water pump, the prior art provides a tester for testing the oil return ability of the oil return pump group under oil-gas mixing conditions. The tester is provided with a pump group, and the output end of the pump group is directly opposite to the output end of the pump group being tested, so as to simulate the hedge oil circuit and be used for the hedge test. However, the tester cannot be used to simulate the situation where the output end of the pump being tested is blocked, and has certain limitations. Summary of the invention

[0004] The present invention provides a water pump anti-interference test method, which can perform a hedge test on a tested pump and simultaneously simulate a situation where an output end of the tested pump is blocked.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The water pump anti-interference test method is implemented by a water pump anti-interference test device, and the water pump anti-interference test device includes:

[0007] A water tank, used for storing water, and having a first water delivery end and a second water delivery end;

[0008] A water pump, comprising a water pump input end and a water pump output end, wherein the water pump input end is connected to the first water delivery end;

[0009] A first stop valve, one end of which is connected to the water pump output end, and the other end of which is connected to the second water delivery end;

[0010] A second stop valve, one end of which is connected to the water pump output end, and the other end of which is connected to the second water delivery end;

[0011] The water pump anti-interference test device is used to connect a water pump to be tested, and the water pump to be tested has a water pump input end and a water pump output end to be tested;

[0012] The water pump anti-interference test method includes a water pump hedge test method, and the water pump hedge test method includes:

[0013] S100: Install the tested water pump so that the input end of the tested water pump is connected to the second water delivery end, and the output end of the tested water pump is connected to the first stop valve;

[0014] S110: Perform output end blocking test and hedging test;

[0015] The output end blocking test includes:

[0016] Confirm that the first stop valve and the second stop valve are open, and confirm that the water pump and the tested water pump are turned on;

[0017] Close the first stop valve, and record the pressure and flow changes at the output end of the tested water pump during the closing process;

[0018] The hedging test includes:

[0019] Confirm that the first stop valve and the second stop valve are open, and confirm that the water pump and the tested water pump are turned on;

[0020] Close the second stop valve, and record the pressure and flow changes at the output end of the tested water pump during the closing process.

[0021] As a preferred solution of the water pump anti-interference test method, in step S110, the output end blocking test is performed multiple times, and in each output end blocking test, the rate of closing the first stop valve is different.

[0022] As a preferred solution of the water pump anti-interference test method, in step S110, the hedge test is performed multiple times, and in each of the hedge tests, the rate of closing the second stop valve is different.

[0023] As a preferred solution of the water pump anti-interference test method, the water pump hedge test method further includes the following steps after step S100:

[0024] S120: Conduct hedge start test;

[0025] The hedge start test includes:

[0026] Confirm that the first stop valve is open, confirm that the second stop valve is closed, and confirm that the water pump is turned on;

[0027] The water pump under test is controlled to start, and changes in pressure and flow at the output end of the water pump under test are recorded during the starting process.

[0028] As a preferred solution of the water pump anti-interference test method, in step S120, the impact start test is performed multiple times, and in each impact start test, the power of the tested water pump is different.

[0029] As a preferred solution of the water pump anti-interference test method, the water pump anti-interference test method also includes a water pump downstream test method, and the water pump downstream test method includes:

[0030] S200: Install the tested water pump so that the input end of the tested water pump is connected to the first stop valve, and the output end of the tested water pump is connected to the second water delivery end;

[0031] S210: Conduct downstream start-up test;

[0032] The downstream start-up test includes:

[0033] Confirm that the first stop valve is open, confirm that the second stop valve is closed, and confirm that the water pump is turned on;

[0034] The water pump under test is controlled to start, and changes in pressure and flow at the output end of the water pump under test are recorded during the starting process.

[0035] As a preferred solution of the water pump anti-interference test method, in step S210, the downstream start-up test is performed multiple times, and in each downstream start-up test, the power of the tested water pump is different.

[0036] As a preferred solution of the water pump anti-interference test method, the water pump downstream test method further includes the following steps after step S200:

[0037] S220: Perform input end blocking test;

[0038] The input end blocking test includes:

[0039] Confirm that the first stop valve is open, confirm that the second stop valve is closed, and confirm that the water pump and the tested water pump are turned on;

[0040] Close the first stop valve, and record the changes in pressure and flow at the output end of the tested water pump during the closing process.

[0041] As a preferred solution of the water pump anti-interference test method, the water pump anti-interference test device also includes:

[0042] a third stop valve, one end of which is connected to the water pump output end, and the other end of which is simultaneously connected to the first stop valve and the second stop valve;

[0043] a fourth stop valve, one end of which is connected to the second water delivery end, and the other end of which is used to simultaneously connect the tested water pump and the second stop valve;

[0044] The water pump anti-interference test method also includes a water vapor mixing test method, and the water vapor mixing test method includes:

[0045] S300: Install the tested water pump so that the input end of the tested water pump is connected to the second water delivery end, and the output end of the tested water pump is connected to the first stop valve;

[0046] S310: confirming that the first stop valve and the second stop valve are open, and confirming that the third stop valve and the fourth stop valve are closed;

[0047] S320: measuring the total volume of the liquid medium in the circuit where the tested water pump is located, and draining the liquid medium in the circuit;

[0048] S330: confirming that the tested water pump is stopped, adding liquid medium to the circuit where the tested water pump is located, wherein the amount of the added liquid medium is n% of the total capacity of the medium, 5≤n≤15;

[0049] S340: starting the tested water pump and determining whether the tested water pump enters a dry-run detection state;

[0050] If the tested water pump has entered the dry-run detection, step S330 is repeated;

[0051] If the tested water pump does not enter the dry-run detection, the total amount of liquid medium in the circuit where the tested water pump is located at this time is recorded.

[0052] As a preferred solution of the water pump anti-interference test method, in step S330, n=10.

[0053] The beneficial effects of the present invention are:

[0054] The present invention provides a water pump anti-interference test method, which is implemented by a water pump anti-interference test device. The water pump anti-interference test device includes a water tank, a water pump, a first stop valve and a second stop valve. The water tank is used to store water and has a first water delivery end and a second water delivery end. The water pump has a water pump input end and a water pump output end. The water pump input end is connected to the first water delivery end. One end of the first stop valve and the second stop valve are both connected to the water pump output end, and the other end is both connected to the second water delivery end, that is, the first stop valve and the second stop valve are arranged in parallel. The water pump anti-interference test device is used to connect the tested water pump, and the tested water pump has a tested water pump input end and a tested water pump output end. The water pump anti-interference test method includes a water pump hedge test method, which includes installing the tested water pump so that the tested water pump input end is connected to the second water delivery end, and the tested water pump output end is connected to the first stop valve; and performing an output end blocking test and a hedge test. Among them, the output end blocking test includes: confirming that the first stop valve and the second stop valve are open, confirming that the water pump and the tested water pump are turned on; closing the first stop valve can be used to simulate the situation that the output end of the tested water pump is blocked, and the pressure and flow changes at the output end of the tested water pump during the closing process can be recorded to analyze the operating state of the tested water pump when the output end of the tested water pump is blocked. The hedge test includes: confirming that the first stop valve and the second stop valve are open, confirming that the water pump and the tested water pump are turned on; closing the second stop valve can be used to simulate the situation that the hedge water flow gradually increases during the hedge process, and the pressure and flow changes at the output end of the tested water pump during the closing process can be recorded to analyze the operating state of the tested water pump when the water flow gradually increases during the hedge process. This water pump anti-interference test method can perform a hedge test on the tested pump and simulate the situation that the output end of the tested pump is blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 The structure diagram of the water pump anti-interference test device in the embodiment of the present invention is as follows: Figure 1 (When implementing the water pump flushing test method);

[0056] Figure 2 is a flow chart of a water pump flushing test method according to an embodiment of the present invention;

[0057] Figure 3 is a flow chart of an output end blocking test in an embodiment of the present invention;

[0058] Figure 4 is a flow chart of a hedging test in an embodiment of the present invention;

[0059] Figure 5 is a flow chart of a hedging start-up test in an embodiment of the present invention;

[0060] Figure 6 The structure diagram of the water pump anti-interference test device in the embodiment of the present invention is as follows: Figure 2(When implementing the water pump downstream test method);

[0061] Figure 7 is a flow chart of a water pump downstream test method according to an embodiment of the present invention;

[0062] Figure 8 is a flow chart of a downstream start-up test in an embodiment of the present invention;

[0063] Fig. 9 is a flow chart of an input end blocking test in an embodiment of the present invention;

[0064] Fig.10 The structure diagram of the water pump anti-interference test device in the embodiment of the present invention is as follows: Figure 3 (When implementing the water vapor mixing test method);

[0065] Fig.11 1 is a flow chart of a water vapor mixing test method in an embodiment of the present invention.

[0066] In the figure:

[0067] 1. Water tank; 2. Water pump; 3. First stop valve; 4. Second stop valve; 5. Third stop valve; 6. Fourth stop valve; 10. Tested water pump;

[0068] 101. First pressure gauge; 102. First flow meter; 103. Second pressure gauge; 104. Second flow meter; 105. Fifth stop valve; 106. Sixth stop valve; 107. Seventh stop valve; 108. Exhaust pipeline; 109. Eighth stop valve. DETAILED DESCRIPTION

[0069] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0070] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0072] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0073] Embodiment 1

[0074] When the water pump is installed, there may be situations where the medium flow direction is the same as or opposite to the actual direction of the water pump, and there may be a situation where the liquid medium is insufficient, all of which will affect the working state of the water pump. In order to test the anti-interference ability of the water pump, the prior art provides a tester for testing the oil return ability of the oil return pump group under oil-gas mixing conditions, which is provided with a pump group, and the output end of the pump group is directly opposite to the output end of the tested pump group, which is used to simulate the hedging oil circuit and is used for hedging tests. However, it cannot be used to simulate the situation where the output end of the tested pump is blocked, and there are certain limitations.

[0075] In this regard, the present embodiment provides a water pump anti-interference test method, which can perform a hedge test on the tested pump and simulate the situation where the output end of the tested pump is blocked, and can be used in the field of water pump technology.

[0076] The water pump anti-interference test method is implemented through the water pump anti-interference test device, refer to Figure 1The water pump anti-interference test device includes a water tank 1, a water pump 2, a first stop valve 3 and a second stop valve 4. The water tank 1 is used to store water and has a first water delivery end and a second water delivery end. The water pump 2 has a water pump input end and a water pump output end, and the water pump input end is connected to the first water delivery end. One end of the first stop valve 3 is connected to the water pump output end, and the other end is connected to the second water delivery end. One end of the second stop valve 4 is connected to the water pump output end, and the other end is connected to the second water delivery end, that is, the first stop valve 3 and the second stop valve 4 are arranged in parallel. The water pump anti-interference test device is used to connect the tested water pump 10, wherein one end of the tested water pump 10 is connected to the second water delivery end, and the other end is connected to the first stop valve 3. Specifically, the tested water pump 10 has a tested water pump input end and a tested water pump output end. When performing different tests, the connection method of the tested water pump 10 is different.

[0077] Optionally, the water pump anti-interference test device further includes a third stop valve 5 and a fourth stop valve 6, wherein one end of the third stop valve 5 is connected to the water pump output end, and the other end is simultaneously connected to the first stop valve 3 and the second stop valve 4; one end of the fourth stop valve 6 is connected to the second water delivery end, and the other end is used to simultaneously connect the tested water pump 10 and the second stop valve 4. In other words, the fourth stop valve 6, the water tank 1, the water pump 2 and the third stop valve 5 are sequentially connected in series. After completing the connection of the tested water pump 10, if the third stop valve 5 and the fourth stop valve 6 are opened at the same time, the water pumped out of the water pump 2 is divided into two paths after passing through the third stop valve 5, one path passes through the first stop valve 3 and the tested water pump 10, and the other path flows through the second stop valve 4, and after merging, flows through the fourth stop valve 6 and returns to the water tank 1.

[0078] Optionally, the water pump anti-interference test device also includes a first pressure gauge 101 and a first flow meter 102 arranged at the output end of the tested water pump, the first pressure gauge 101 is used to detect the water pressure at the output end of the tested water pump, and the first flow meter 102 is used to detect the flow at the output end of the tested water pump. The tester can judge the operating state of the output end of the tested water pump according to the measurement results. Optionally, the water pump anti-interference test device also includes a second pressure gauge 103 and a second flow meter 104 arranged at the output end of the water pump, the second pressure gauge 103 is used to detect the water pressure at the output end of the water pump, and the second flow meter 104 is used to detect the flow at the output end of the water pump. The tester can know the flow and pressure of the pipeline where the water pump 2 is located according to the measurement results, and then calculate the flow and pressure of the pipeline where the second stop valve 4 is located. In addition, the operating state of the water pump 2 can also be judged according to the measurement results of the second pressure gauge 103 and the second flow meter 104, which is convenient for the tester to judge whether the water pump 2 needs to be replaced and then conduct relevant tests.

[0079] Optionally, the water pump anti-interference test device also includes a fifth stop valve 105 and a sixth stop valve 106, the sixth stop valve 106 is arranged between the water pump input end and the first water delivery end, one end of the fifth stop valve 105 is connected to the water pump 10 under test, and the other end is simultaneously connected to the second stop valve 4 and the fourth stop valve 6, that is, the fifth stop valve 105, the water pump 10 under test and the first stop valve 3 are connected in series in sequence.

[0080] Optionally, the water pump anti-interference test device is further provided with an exhaust pipeline 108, and the exhaust pipeline 108 is provided with a seventh stop valve 107, and the seventh stop valve 107 is used to control the on-off of the exhaust pipeline 108, and the exhaust pipeline 108 is only used for gas discharge. In this embodiment, the inlet end of the exhaust pipeline 108 is connected to one end of the second stop valve 4.

[0081] Reference Figure 2 The water pump anti-interference test method includes a water pump counter-attack test method, and the water pump counter-attack test method includes the following steps.

[0082] S100: Install the tested water pump 10 so that the input end of the tested water pump is connected to the second water delivery end, and the output end of the tested water pump is connected to the first stop valve 3.

[0083] The above-mentioned water pump anti-interference test device is provided. After the installation of the tested water pump 10 is completed, the output end of the tested water pump is directly opposite to the output end of the water pump, which can be used for related tests of hedging. After the tested water pump 10 is installed, the specific structure of the water pump anti-interference test device is as follows: Figure 1 shown.

[0084] S110: Perform output end blocking test and hedging test.

[0085] Reference Figure 3 , the output end blocking test includes:

[0086] Confirm that the first stop valve 3 and the second stop valve 4 are open, and confirm that the water pump 2 and the tested water pump 10 are turned on.

[0087] In addition, the third stop valve 5 , the fourth stop valve 6 , the fifth stop valve 105 , the sixth stop valve 106 and the seventh stop valve 107 are all opened.

[0088] Close the first stop valve 3, and record the changes in pressure and flow at the output end of the measured water pump during the closing process.

[0089] Closing the first stop valve 3 can simulate the situation where the output end of the tested water pump is blocked, and the pressure and flow changes at the output end of the tested water pump during the closing process can be recorded to analyze the operating state of the tested water pump 10 when the output end of the tested water pump is blocked. If the tested water pump 10 is shut down or restarted, the controller parameters need to be adjusted according to the fault feedback until the tested water pump 10 can operate normally.

[0090] Optionally, in step S110, multiple output end blocking tests are performed, and in each output end blocking test, the rate of closing the first stop valve 3 is different, including at least one test of quickly closing the first stop valve 3 and one test of slowly closing the first stop valve 3. The results of the two tests can be compared and analyzed to analyze the operating status of the tested water pump 10 under different working conditions.

[0091] Reference Figure 4 , the hedging test includes:

[0092] Confirm that the first stop valve 3 and the second stop valve 4 are open, and confirm that the water pump 2 and the tested water pump 10 are turned on.

[0093] In addition, the third stop valve 5 , the fourth stop valve 6 , the fifth stop valve 105 , the sixth stop valve 106 and the seventh stop valve 107 are all opened.

[0094] Close the second stop valve 4, and record the changes in pressure and flow at the output end of the measured water pump during the closing process.

[0095] Specifically, the opening of the second stop valve 4 is controlled to gradually decrease to 0. After closing the second stop valve 4, the output end of the water pump is directly opposite to the output end of the tested water pump, which can be used to simulate the situation in which the flushing water flow gradually increases during the flushing process. The pressure and flow changes at the output end of the tested water pump during the closing process can be recorded to analyze the operating state of the tested water pump when the water flow gradually increases during the flushing process. If the tested water pump 10 is shut down or restarted, the controller parameters need to be adjusted according to the fault feedback until the tested water pump 10 can operate normally.

[0096] Optionally, in step S110, multiple hedge tests are performed, and in each hedge test, the rate of closing the second stop valve 4 is different, including at least one test of quickly closing the second stop valve 4 and one test of slowly closing the second stop valve 4. The results of the two tests can be compared and analyzed to analyze the operating status of the tested water pump 10 under different working conditions.

[0097] The water pump anti-interference test method can perform a hedge test on the tested pump 10 and can also simulate a situation where the output end of the tested pump is blocked.

[0098] Optionally, the water pump hedge test method further includes S120 after step S100.

[0099] S120: Perform a hedge start test.

[0100] Among them, S120 can be implemented before step S110, or step S110 can be implemented first and then step S120, and there is no limitation on this. In addition, in step S110, there is no restriction on the order of implementation of the output end blocking test and the hedging test. The user can arrange the test order of the output end blocking test, the hedging test and the hedging start test according to the actual situation.

[0101] Reference Figure 5 , the hedge start test includes:

[0102] Confirm that the first stop valve 3 is open, confirm that the second stop valve 4 is closed, and confirm that the water pump 2 is turned on.

[0103] In addition, the third stop valve 5 , the fourth stop valve 6 , the fifth stop valve 105 , the sixth stop valve 106 and the seventh stop valve 107 are all opened.

[0104] The water pump 10 under test is controlled to start, and the changes in pressure and flow at the output end of the water pump under test during the starting process are recorded.

[0105] In this way, the startup state of the tested water pump 10 in the counter-flow state can be tested, and the pressure and flow changes at the output end of the tested water pump during the shutdown process can be recorded to analyze whether the tested water pump 10 can start normally in the state of counter-flow. If the tested water pump 10 is shut down or restarted, the controller parameters need to be adjusted according to the fault feedback until the tested water pump 10 can operate normally.

[0106] Optionally, in step S120, multiple counter-start tests are performed, and in each counter-start test, the power of the tested water pump 10 is different, so that the difference in operating state when the tested water pump 10 is started with different powers in the presence of counter-start water flow can be tested.

[0107] Embodiment 2

[0108] This embodiment provides a water pump anti-interference test method. Based on the water pump anti-interference test method of the first embodiment, the water pump anti-interference test method also includes a water pump downstream test method. Figure 7 , the water pump downstream test method includes the following steps.

[0109] S200: Install the tested water pump 10 so that the input end of the tested water pump is connected to the first stop valve 3, and the output end of the tested water pump is connected to the second water delivery end.

[0110] After the installation of the tested water pump 10 is completed, the input end of the tested water pump is directly opposite to the output end of the water pump, which can be used for relevant downstream tests. Figure 6 shown.

[0111] S210: Perform a downstream start-up test.

[0112] Reference Figure 8 , the downstream start-up test includes:

[0113] Confirm that the first stop valve 3 is open, confirm that the second stop valve 4 is closed, and confirm that the water pump 2 is turned on.

[0114] In addition, the third stop valve 5 , the fourth stop valve 6 , the fifth stop valve 105 , the sixth stop valve 106 and the seventh stop valve 107 are all opened.

[0115] The water pump 10 under test is controlled to start, and the pressure and flow changes at the output end of the water pump under test are recorded during the starting process.

[0116] In this way, the startup of the tested water pump 10 in the presence of downstream water flow can be tested. If the tested water pump 10 is shut down or restarted, the controller parameters need to be adjusted according to the fault feedback until the tested water pump 10 can operate normally.

[0117] In step S210, multiple downstream start tests are performed, and in each downstream start test, the power of the tested water pump 10 is different, so that the difference in the operating state of the tested water pump 10 when started with different powers in the state of downstream water flow can be tested.

[0118] Optionally, the water pump downstream test method further includes S220 after step S200.

[0119] S220: Perform an input end blocking test.

[0120] Among them, S120 can be implemented before step S110, or step S110 can be implemented first and then step S120. There is no limitation on this. The user can arrange the test sequence of the downstream start-up test and the input end blocking test according to actual conditions.

[0121] Reference Fig. 9 , the input end blocking test includes:

[0122] Confirm that the first stop valve 3 is open, confirm that the second stop valve 4 is closed, and confirm that the water pump 2 and the tested water pump 10 are turned on.

[0123] In addition, the third stop valve 5 , the fourth stop valve 6 , the fifth stop valve 105 , the sixth stop valve 106 and the seventh stop valve 107 are all opened.

[0124] Close the first stop valve 3, and record the changes in pressure and flow at the output end of the measured water pump during the closing process.

[0125] Closing the first stop valve 3 can simulate the situation where the input end of the tested water pump is blocked, and the pressure and flow changes at the output end of the tested water pump during the closing process can be recorded to analyze the operating state of the tested water pump 10 when the input end of the tested water pump is blocked. If the tested water pump 10 is shut down or restarted, the controller parameters need to be adjusted according to the fault feedback until the tested water pump 10 can operate normally.

[0126] Optionally, in step S220, multiple input end blocking tests are performed, and in each input end blocking test, the rate of closing the first stop valve 3 is different, including at least one test of quickly closing the first stop valve 3 and one test of slowly closing the first stop valve 3. The results of the two tests can be compared and analyzed to analyze the operating status of the tested water pump 10 under different working conditions.

[0127] Embodiment 3

[0128] This embodiment provides a water pump anti-interference test method. Based on the water pump anti-interference test method of the first embodiment, the water pump anti-interference test method also includes a water vapor mixing test method. Fig.10 In this embodiment, the water pump anti-interference test device no longer has an exhaust pipeline 108 and a seventh stop valve 107. At the same time, in order to facilitate the addition of liquid medium to the circulation loop, a medium adding pipeline is also provided, and the medium adding pipeline is provided with an eighth stop valve 109, and the eighth stop valve 109 is used to control the on-off of the medium adding pipeline.

[0129] Reference Fig.11 , the water vapor mixing test method includes the following steps.

[0130] S300: Install the tested water pump 10 so that the input end of the tested water pump is connected to the second water delivery end, and the output end of the tested water pump is connected to the first stop valve 3.

[0131] After the installation of the tested water pump 10 is completed, the specific structure of the water pump anti-interference test device is as follows: Fig.10 shown.

[0132] S310: Confirm that the first stop valve 3 and the second stop valve 4 are open, and confirm that the third stop valve 5 and the fourth stop valve 6 are closed.

[0133] In addition, the fifth stop valve 105 and the eighth stop valve 109 are opened, and the sixth stop valve 106 is closed, so that a circulation loop can be formed in which only the water pump 10 to be tested is set. The water pumped out by the water pump 10 to be tested passes through the first pressure gauge 101, the first flow meter 102, the first stop valve 3, the second stop valve 4 and the fifth stop valve 105 in sequence, and flows back to the input end of the water pump to be tested.

[0134] S320: Measure the total volume of the liquid medium in the circuit where the tested water pump 10 is located, and drain the liquid medium in the circuit.

[0135] The circuit may be first filled with liquid medium, and then the amount of liquid discharged may be measured to obtain the total capacity of the liquid medium in the circuit where the measured water pump 10 is located.

[0136] S330: confirm that the tested water pump 10 is stopped, and add liquid medium to the circuit where the tested water pump 10 is located, wherein the amount of the added liquid medium is n% of the total capacity of the medium, 5≤n≤15.

[0137] S340: starting the tested water pump 10 and determining whether the tested water pump 10 enters a dry-run detection state;

[0138] If the tested water pump 10 has entered the dry-running detection, step S330 is repeated; if the tested water pump 10 has not entered the dry-running detection, the total amount of liquid medium in the circuit where the tested water pump 10 is located at this time is recorded.

[0139] By continuously adding liquid medium to the circuit where the tested water pump 10 is located, it is determined whether the tested water pump 10 has entered the dry-run detection, and a threshold value at which the tested water pump 10 begins to run dry can be obtained through experiments.

[0140] If the tested water pump 10 has entered the dry-run detection, it indicates that the tested water pump 10 has detected that it is running dry, and therefore step S330 needs to be repeated to find the threshold at which the tested water pump 10 starts running dry. In step S330, the size of the parameter n corresponds to the amount of liquid medium added to the total capacity of the circuit medium each time S330 is repeated. In this embodiment, n=10.

[0141] If the tested water pump 10 does not enter the dry-run detection, it means that at this time, the ratio of the total amount of liquid medium in the circuit where the tested water pump 10 is located to the total capacity of the medium has exceeded the threshold value at which the tested water pump 10 starts to run dry. In this way, the actual threshold value at which the tested water pump 10 starts to run dry can be roughly estimated. The parameter value can be compared with the design value. If they are inconsistent, the dry-running current value of the tested water pump 10 needs to be adjusted.

[0142] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A water pump anti-interference test method is implemented by a water pump anti-interference test device, wherein the water pump anti-interference test device comprises: A water tank (1), used for storing water, and having a first water delivery end and a second water delivery end; A water pump (2) having a water pump input end and a water pump output end, wherein the water pump input end is connected to the first water delivery end; A first stop valve (3), one end of which is connected to the water pump output end, and the other end of which is connected to the second water delivery end; A second stop valve (4), one end of which is connected to the water pump output end, and the other end of which is connected to the second water delivery end; The water pump anti-interference test device is used to connect a water pump (10) to be tested, and the water pump (10) to be tested has a water pump input end and a water pump output end to be tested; It is characterized in that the water pump anti-interference test method includes a water pump hedge test method, and the water pump hedge test method includes: S100: installing the water pump to be tested (10) so that the input end of the water pump to be tested is connected to the second water delivery end, and the output end of the water pump to be tested is connected to the first stop valve (3); S110: Perform output end blocking test and hedging test; The output end blocking test includes: Confirming that the first stop valve (3) and the second stop valve (4) are open, and confirming that the water pump (2) and the tested water pump (10) are turned on; Closing the first stop valve (3), and recording the changes in pressure and flow at the output end of the tested water pump during the closing process; The hedging test includes: Confirming that the first stop valve (3) and the second stop valve (4) are open, and confirming that the water pump (2) and the tested water pump (10) are turned on; The second stop valve (4) is closed, and the changes in pressure and flow at the output end of the tested water pump during the closing process are recorded.

2. The water pump anti-interference test method according to claim 1 is characterized in that: In step S110, the output end blocking test is performed multiple times, and in each output end blocking test, the rate of closing the first stop valve (3) is different.

3. The water pump anti-interference test method according to claim 1 is characterized in that: In step S110, the hedging test is performed multiple times, and in each of the hedging tests, the rate of closing the second stop valve (4) is different.

4. The water pump anti-interference test method according to claim 1 is characterized in that: The water pump flushing test method further includes, after step S100: S120: Conduct hedge start test; The hedge start test includes: Confirm that the first stop valve (3) is open, confirm that the second stop valve (4) is closed, and confirm that the water pump (2) is turned on; The water pump (10) under test is controlled to start, and changes in pressure and flow at the output end of the water pump under test are recorded during the starting process.

5. The water pump anti-interference test method according to claim 4 is characterized in that: In step S120, the impact start test is performed multiple times, and in each impact start test, the power of the tested water pump (10) is different.

6. The water pump anti-interference test method according to any one of claims 1 to 5, characterized in that: The water pump anti-interference test method also includes a water pump downstream test method, and the water pump downstream test method includes: S200: installing the water pump (10) to be tested so that the input end of the water pump to be tested is connected to the first stop valve (3), and the output end of the water pump to be tested is connected to the second water delivery end; S210: Conduct downstream start-up test; The downstream start-up test includes: Confirm that the first stop valve (3) is open, confirm that the second stop valve (4) is closed, and confirm that the water pump (2) is turned on; The water pump (10) under test is controlled to start, and changes in pressure and flow at the output end of the water pump under test are recorded during the starting process.

7. The water pump anti-interference test method according to claim 6, characterized in that: In step S210, the downstream start-up test is performed multiple times, and in each downstream start-up test, the power of the tested water pump (10) is different.

8. The water pump anti-interference test method according to claim 6, characterized in that: The water pump downstream test method further includes, after step S200: S220: Perform input end blocking test; The input end blocking test includes: Confirm that the first stop valve (3) is open, confirm that the second stop valve (4) is closed, and confirm that the water pump (2) and the tested water pump (10) are turned on; The first stop valve (3) is closed, and changes in pressure and flow at the output end of the tested water pump during the closing process are recorded.

9. The water pump anti-interference test method according to any one of claims 1 to 5, characterized in that: The water pump anti-interference test device also includes: A third stop valve (5), one end of which is connected to the output end of the water pump, and the other end of which is simultaneously connected to the first stop valve (3) and the second stop valve (4); a fourth stop valve (6), one end of which is connected to the second water delivery end, and the other end of which is used to simultaneously connect to the tested water pump (10) and the second stop valve (4); The water pump anti-interference test method also includes a water vapor mixing test method, and the water vapor mixing test method includes: S300: installing the water pump to be tested (10) so that the input end of the water pump to be tested is connected to the second water delivery end, and the output end of the water pump to be tested is connected to the first stop valve (3); S310: confirming that the first stop valve (3) and the second stop valve (4) are open, and confirming that the third stop valve (5) and the fourth stop valve (6) are closed; S320: measuring the total volume of the liquid medium in the circuit where the tested water pump (10) is located, and draining the liquid medium in the circuit; S330: confirming that the tested water pump (10) is stopped, adding liquid medium to the circuit where the tested water pump (10) is located, wherein the amount of the added liquid medium is n% of the total capacity of the medium, 5≤n≤15; S340: starting the tested water pump (10) and determining whether the tested water pump (10) has entered a dry-run detection state; If the tested water pump (10) has entered the dry-run detection, step S330 is repeated; If the tested water pump (10) has not entered the dry-run detection, the total amount of liquid medium in the circuit where the tested water pump (10) is located is recorded at this time.

10. The water pump anti-interference test method according to claim 9, characterized in that: In step S330, n=10.

Images