Three-way valve performance test system and method

Abstract

The invention relates to the technical field of three-way valve performance testing, and particularly discloses a three-way valve performance testing system and method. Comprising a main loop connected with an inlet of a three-way valve, a first branch connected with a first outlet of the three-way valve and the main loop, a second branch connected with a second outlet of the three-way valve and the main loop, branch test assemblies arranged on the first branch and the second branch, and a main test assembly arranged on the main loop. The water pump is arranged on the main loop, and the control unit is respectively connected with the main test assembly and the branch test assembly. According to the invention, multiple performances such as the flow resistance characteristic, the internal leakage rate, the turn-off pressure difference, the load and the service life reliability of the three-way valve can be effectively tested; the use risk is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of three-way valve performance testing, and more specifically, to a three-way valve performance testing system and method. Background Art

[0002] In circulating water cooling systems such as power, electronic devices, and wind power, three-way valves are key components, and their performance can often greatly affect the various performances of the entire system. Therefore, it is very important to conduct relevant tests on the various performance indicators of the three-way valve. These performance indicators include flow resistance characteristics, internal leakage, shut-off pressure difference, load, life reliability, etc. These tests can help ensure the reliability and stability of the three-way valve, thereby ensuring the normal operation of the entire system.

[0003] In the existing technology, the performance of three-way valves is mainly obtained through theoretical engineering calculations. Although this method is simple, the results are often inaccurate. In addition, the existing testing methods are also relatively scattered and no complete performance summary test is performed. This may result in some performance indicators not being fully tested, thereby increasing the risk of use.

[0004] The existing three-way valve performance test method has the following problems:

[0005] First, due to the inaccurate testing method, directly using this data may bring greater risks. Once a problem occurs, the consequences may be very serious, causing huge economic losses;

[0006] Secondly, the existing testing methods fail to conduct complete performance induction testing, which may result in some performance indicators not being fully tested, thereby increasing the risk of use;

[0007] Therefore, the existing three-way valve performance test method has certain limitations in practical applications and cannot meet the testing requirements. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a three-way valve performance testing system and method; it can effectively test the flow resistance characteristics, internal leakage, shut-off pressure difference, load, life reliability and other performance of the three-way valve; and reduce the risk of use.

[0009] The solution adopted by the present invention to solve the technical problem is:

[0010] A three-way valve performance test system includes a main circuit connected to the inlet of the three-way valve, a branch circuit 1 connected to the first outlet of the three-way valve and respectively connected to the main circuit, a branch circuit 2 connected to the second outlet of the three-way valve and respectively connected to the main circuit, branch test components respectively arranged on the branch circuit 1 and the branch circuit, a main test component arranged on the main circuit, a water pump arranged on the main circuit, and a control unit respectively connected to the main test component and the branch test component.

[0011] In some possible embodiments, in order to effectively realize the pressure test at the outlet of the three-way valve, the flow test and regulation of the fluid medium in the branch, and the adjustment of the shut-off pressure difference; the branch test assembly includes a branch pressure sensor for pressure testing at the first outlet or the second outlet, a branch flow sensor and a branch regulating valve for monitoring the flow of the fluid medium in branch one or branch two; the branch pressure sensor and the branch regulating valve are arranged in sequence along the flow direction of the fluid medium, and the branch flow sensor is arranged between the branch pressure sensor and the branch regulating valve or on the side of the branch regulating valve away from the branch pressure sensor.

[0012] In some possible implementations, in order to effectively implement the pressure test at the inlet of the three-way valve, the test of the flow rate and temperature of the fluid medium in the main circuit and the adjustment of the flow rate;

[0013] The main test assembly includes a main pressure sensor for monitoring the pressure at the inlet of the three-way valve, a main flow sensor for monitoring the flow of the fluid medium in the main circuit, a temperature sensor for monitoring the temperature of the fluid medium and a main regulating valve;

[0014] The main pressure sensor is arranged between the water pump and the three-way valve.

[0015] In some possible implementations, the main regulating valve is arranged on a side of the water pump away from the main pressure sensor; the temperature sensor is arranged between the main regulating valve and the water pump;

[0016] The main flow sensor is arranged on a side of the main regulating valve away from the temperature sensor.

[0017] In some possible implementations, in order to ensure that the entire system can maintain a stable system pressure during testing;

[0018] It also includes a buffer voltage stabilizing device connected to the main circuit, and the buffer voltage stabilizing device is provided with a filling and draining valve and an exhaust valve;

[0019] The connection point between the buffer pressure stabilizing device and the main circuit is arranged between the temperature sensor and the main regulating valve.

[0020] In some possible implementations, in order to effectively filter impurities in the main circuit;

[0021] It also includes a filter assembly that is arranged on the main circuit and located between the connection point between the buffer voltage stabilizing device and the main circuit and the temperature sensor.

[0022] In some possible implementations, in order to effectively implement the test of the three-way valve load;

[0023] Also included is a force sensor or torque sensor for testing the load of a three-way valve.

[0024] In some possible implementations, in order to reduce the temperature of the fluid medium during testing;

[0025] It also includes a radiator which is arranged on the main circuit and close to the connection point between the main circuit and the first branch and the second branch.

[0026] A testing method for a three-way valve performance testing system specifically comprises the following steps:

[0027] Close one set of branch regulating valves and open the other set of branch regulating valves to test the flow resistance characteristics, shut-off pressure difference, internal leakage and load of the three-way valve;

[0028] When testing the flow resistance characteristics of the three-way valve, the flow rate of the fluid medium in the main circuit is adjusted by the main regulating valve, and the main flow sensor measures the flow rate of the fluid medium in the main circuit and records the flow data; the pressure sensor performs a pressure test to obtain the pressure at the outlet and inlet connected to the three-way valve; the pressure difference formed by the pressure at the inlet and the pressure at the outlet of the branch connected to the main circuit is calculated to obtain the flow resistance of the three-way valve at this flow rate;

[0029] During the three-way valve shut-off pressure differential test, adjust the main regulating valve and the branch regulating valve on the branch connected to the main circuit; the main flow sensor tests the flow data of the fluid medium in the main circuit; obtain the pressure at the inlet of the three-way valve and the outlet of the three-way valve corresponding to the unconnected branch, and calculate the pressure differential to obtain the shut-off pressure differential of the unconnected branch of the three-way valve;

[0030] When testing the internal leakage of the three-way valve, adjust the flow rate of the fluid medium in the main circuit through the main regulating valve; adjust the branch regulating valve on the branch connected to the three-way valve to adjust the shut-off pressure difference; record the flow rate of the branch not connected to the three-way valve, which is the internal leakage of the three-way valve at this position under the shut-off pressure difference;

[0031] When conducting a load test on a three-way valve, adjust the flow rate of the fluid medium in the main circuit through the main regulating valve; adjust the branch regulating valve on the branch connected to the three-way valve to adjust the shut-off pressure difference, and record the monitoring value of the force sensor or torque sensor; adjust the three-way valve to different openings, and record the force value or torque value of the three-way valve at each opening.

[0032] In some possible implementations, the method further includes adjusting the initial flow rate and the shutoff pressure difference through the main regulating valve and the branch regulating valve, controlling the three-way valve to perform cyclic operation, and testing the service life of the three-way valve.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention can effectively test the flow resistance characteristics, internal leakage, shut-off pressure difference, load, and life reliability of the three-way valve by setting the main test component and the branch test component.

[0035] The three-way valve performance test system designed by the present invention obtains various performance indicators of the three-way valve by actual testing. Compared with the existing method obtained by theoretical engineering calculation, the test result is more accurate and can more truly reflect the performance of the three-way valve, thereby reducing the risk of use.

[0036] The test system of the present invention can not only test conventional performance indicators such as flow resistance characteristics, internal leakage, shut-off pressure difference, load, life reliability, etc., but also perform a complete performance summary test through the control system to comprehensively evaluate the performance of the three-way valve, thereby further reducing the risk of use.

[0037] The test system of the present invention is mainly composed of a flow sensor, a pressure sensor, a temperature sensor, a regulating valve, a main circuit, and a branch circuit to form a circuit. It has a simple structure and is easy to operate. Compared with the existing test system, it reduces the operating difficulty, has lower professional skill requirements for operators, and is easy to promote and apply.

[0038] The test system of the present invention integrates multiple components including a water pump, a pressure sensor, a flow sensor, a regulating valve, a radiator, a temperature sensor, and a filter, and can perform multiple tests simultaneously, thereby improving test efficiency and saving test time.

[0039] The test system of the present invention can monitor parameters such as the temperature of the system fluid medium, the main circuit flow rate, and filter impurities in the system in real time during the test process, thereby ensuring the safety and reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a connection relationship schematic diagram of the present invention;

[0041] Among them: 1. Water pump; 21. Main pressure sensor; 22. Branch pressure sensor 2; 23. Branch pressure sensor 3; 3. Three-way valve; 41. Branch regulating valve 2; 42. Branch regulating valve 1; 43. Main regulating valve; 51. Branch flow sensor 2; 52. Branch flow sensor 1; 53. Main flow sensor; 6. Radiator; 7. Charging and draining valve; 8. Buffering and voltage stabilizing device; 9. Exhaust valve; 10. Filter assembly; 11. Temperature sensor; 20. Main circuit; 30. Branch 1; 40. Branch 2. DETAILED DESCRIPTION

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. The "first", "second" and similar words mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "one" and other similar words do not indicate a quantity restriction, but indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more. For example, multiple positioning columns refer to two or more positioning columns. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention is described in detail below.

[0044] like Figure 1 As shown:

[0045] A three-way valve 3 performance test system includes a main circuit 20 connected to the inlet of the three-way valve 3, a branch 1 30 connected to the first outlet of the three-way valve 3 and respectively connected to an end of the main circuit 20 away from the three-way valve 3, a branch 2 40 respectively connected to the second outlet of the three-way valve 3 and an end of the main circuit 20 away from the three-way valve 3, branch test components respectively arranged on the branch 1 30 and the branch 2 40, a main test component arranged on the main circuit 20, a water pump 1 arranged on the main circuit 20, and a control unit respectively connected to the main test component and the branch test component.

[0046] The inlet of the three-way valve 3 is connected to one end of the main circuit 20, one end of the branch 1 30 is connected to the first outlet and the other end is connected to the main circuit 20, one end of the branch 2 40 is connected to the second outlet and the other end is connected to the main circuit 20; the flow resistance characteristics, internal leakage, shut-off pressure difference, load and multiple performances of the three-way valve 3 are monitored;

[0047] In some possible implementations, in order to effectively implement the pressure test at the outlet of the three-way valve 3, the fluid medium flow test and adjustment in the branch (branch one 30, branch two 40), and the adjustment of the shut-off pressure difference; the branch test assembly includes a branch pressure sensor for pressure testing at the first outlet or the second outlet of the three-way valve 3, a branch flow sensor and a branch regulating valve for monitoring the fluid medium flow in branch one 30 or branch two 40; the branch pressure sensor and the branch regulating valve are arranged in sequence along the flow direction of the fluid medium, and the branch flow sensor is arranged between the branch pressure sensor and the branch regulating valve or on the side of the branch regulating valve away from the branch pressure sensor;

[0048] Specifically, the branch pressure sensor provided on the branch 1 30 is a branch pressure sensor 1 23, the branch flow sensor is a branch flow sensor 1 52, and the branch regulating valve is a branch regulating valve 1 42;

[0049] The branch pressure sensor provided on the branch 2 40 is the branch pressure sensor 2 22 , the branch flow sensor is the branch flow sensor 51 , and the branch regulating valve is the branch regulating valve 41 .

[0050] In some possible implementations, in order to effectively implement the pressure test at the inlet of the three-way valve 3, the test of the flow rate and temperature of the fluid medium in the main circuit 20, and the adjustment of the flow rate of the fluid medium;

[0051] The main test assembly includes a main pressure sensor 21 for monitoring the pressure at the inlet of the three-way valve 3, a main flow sensor 53 for monitoring the flow of the fluid medium in the main circuit 20, a temperature sensor 11 for monitoring the temperature of the fluid medium and a main regulating valve 43; the main pressure sensor 21 is arranged between the water pump 1 and the three-way valve 3.

[0052] The temperature and flow rate of the fluid medium in the main circuit 20 can be monitored by setting the main test piece;

[0053] By testing the branch test assembly, the flow of the corresponding branch can be monitored, and a certain branch (branch one 30 or branch two 40) can be closed or opened to adjust the shut-off pressure difference; the flow resistance characteristics of the three-way valve 3 can be tested by the pressure difference formed at the inlet and outlet (first outlet or second outlet) of the three-way valve 3 and the flow of the fluid medium in the main circuit 20;

[0054] By monitoring the flow on the unconnected branch (branch 1 30 or branch 2 40), the internal leakage of the three-way valve 3 under a certain shut-off pressure difference is obtained;

[0055] The shut-off pressure difference between the three-way valve 3 and the unconnected branch is obtained by the differential pressure formed at the inlet of the three-way valve 3 and the outlet of the unconnected branch (branch one 30 or branch two 40); the differential pressure is adjusted by adjusting the branch regulating valve between the inlet of the three-way valve 3 and the connected branch (branch two 40 or branch one 30);

[0056] The shut-off pressure difference is adjusted by adjusting the branch regulating valve on the branch (branch one 30 or branch two 40) connected to the three-way valve 3, and the force value or torque value of the three-way valve 3 is recorded to perform load testing.

[0057] In some possible implementations, the main regulating valve 43 is disposed on a side of the water pump 1 away from the main pressure sensor 21; the temperature sensor 11 is disposed between the main regulating valve 43 and the water pump 1;

[0058] The main flow sensor 53 is disposed on a side of the main regulating valve 43 away from the temperature sensor 11 .

[0059] In some possible implementations, in order to ensure that the entire system can maintain a stable system pressure during testing;

[0060] It also includes a buffering and stabilizing device 8 connected to the main circuit 20, and the buffering and stabilizing device 8 is provided with a filling and draining valve 7 and an exhaust valve 9; the filling and draining valve 7 is used for filling and draining, and the exhaust valve 9 is used for exhausting, and the number can be adjusted according to the use requirements to keep the system pressure stable;

[0061] The connection point between the buffer pressure stabilizing device 8 and the main circuit 20 is arranged between the temperature sensor 11 and the main regulating valve 43 .

[0062] In some possible implementations, in order to effectively filter impurities in the main loop 20;

[0063] It also includes a filter assembly 10 that is disposed on the main circuit 20 and is located between the connection point between the buffer voltage stabilizing device 8 and the main circuit 20 and the temperature sensor 11 .

[0064] In some possible implementations, in order to effectively implement the test of the load of the three-way valve 3;

[0065] The utility model also comprises a force sensor or a torque sensor for testing the load of the three-way valve 3 .

[0066] In some possible implementations, in order to reduce the temperature of the fluid medium during testing;

[0067] It also includes a radiator 6 arranged on the main circuit 20 and close to the connection point between the main circuit 20 and the branch 1 30 and the branch 2 40 to cool the fluid medium entering the main circuit 20 from the branch 1 30 or the branch 2 40.

[0068] The temperature sensor 11, each flow sensor, each regulating valve, each pressure sensor, buffer voltage stabilizing device 8, radiator 6, and filter assembly in the present invention are all existing products, and the internal structure is not described in detail here.

[0069] Based on the above test system, the test method of this system is described;

[0070] The test method of the flow resistance characteristic of the three-way valve 3 is as follows: first, the opening of the three-way valve 3 is set to connect the branch 1 30, and the branch 2 40 is closed, that is, the three-way valve 3 controls the branch 1 30 to be opened and the branch 2 40 to be closed; the fluid medium enters from the inlet of the three-way valve 3 under the drive of the water pump 1, passes through the first outlet of the three-way valve 3 and the branch 1 30, and then enters the main circuit 20; the flow rate of the fluid medium is adjusted by the main regulating valve 43 on the main circuit 20, the main flow sensor 53 set on the main circuit 20 tests the flow rate, the main pressure sensor 21 monitors the pressure at the inlet of the three-way valve 3, and the branch pressure sensor 23 on the branch 1 30 monitors the pressure at the first outlet, and transmits the above data to the control unit, and the control unit calculates the pressure at the inlet of the three-way valve 3 and the pressure at the first outlet The inlet and outlet pressure difference A formed; then the opening of the three-way valve 3 is set to connect the branch 2 40, and the branch 1 30 is closed, that is, the branch regulating valve 2 41 on the branch 2 40 is opened, and the branch regulating valve 1 42 on the branch 1 30 is closed; the flow rate of the fluid medium is adjusted by the main regulating valve 43 on the main circuit 20, the main flow sensor 53 arranged on the main circuit 20 tests the flow rate, the main pressure sensor 21 monitors the pressure at the inlet of the three-way valve 3, and the branch pressure sensor 2 22 on the branch 2 40 monitors the pressure at the second outlet, and transmits the above data to the control unit, and the control unit calculates the inlet and outlet pressure difference B formed by the pressure at the inlet of the three-way valve 3 and the pressure at the second outlet; the resistance of the three-way valve 3 under this flow rate can be obtained through the inlet and outlet pressure differences A and B.

[0071] Taking the case where branch 1 30 is connected to the three-way valve 3 and branch 2 40 is closed as an example, the shut-off pressure difference test of branch 2 40 is performed, and the opening of the three-way valve 3 is set to connect branch 1 30 and close branch 2 40; the fluid medium enters from the inlet of the three-way valve 3 under the drive of the water pump 1, passes through the first outlet and branch 1 30, and enters the main circuit 20; the flow rate of the fluid medium is adjusted by the main regulating valve 43 and the branch regulating valve 1 42 on the branch 1 30, and the main flow sensor 53 monitors the flow rate of the main circuit 20. The pressure sensor 21 monitors the pressure at the inlet of the three-way valve 3, and the branch pressure sensor 22 on the branch 2 40 monitors the pressure at the second outlet and transmits the relevant data to the control unit; the control unit records the flow rate of the main circuit 20, the pressure at the inlet of the three-way valve 3, and the pressure at the second outlet at this time, and calculates the pressure difference formed at the inlet of the three-way valve 3 and the second outlet, which is the shut-off pressure difference of the branch 2 40; similarly, the shut-off pressure difference of the branch 1 30 or the branch 2 40 of the three-way valve 3 under different flow rates can be tested.

[0072] The method for testing the internal leakage of the three-way valve 3 is as follows: the opening of the three-way valve 3 is set to connect the branch 1 30, and the branch 2 40 is closed; the fluid medium enters from the inlet of the three-way valve 3 under the drive of the water pump 1, passes through the first outlet and the branch 1 30, and enters the main circuit 20; the flow rate of the fluid medium is adjusted by the main regulating valve 43 on the main circuit 20, and the shut-off pressure difference is adjusted by the branch regulating valve 1 42 on the branch 1 30; the branch flow sensor 2 51 tests the flow rate of the fluid medium in the branch 2 40, which is the flow rate of the branch 2 40 at this position of the three-way valve 3 under a certain shut-off pressure difference. 0 internal leakage; similarly, the opening of the three-way valve 3 is set to connect the branch 2 40, and the branch 1 30 is closed; the fluid medium enters from the inlet of the three-way valve 3 under the drive of the water pump 1, passes through the second outlet and the branch 2 40, and enters the main circuit 20; the flow rate of the fluid medium is adjusted by the main regulating valve 43 on the main circuit 20, and the shut-off pressure difference is adjusted by the branch regulating valve 2 41 on the branch 2 40; the branch flow sensor 1 52 tests the flow rate of the fluid medium in the branch 1 30, and the flow rate is the leakage of the branch 1 30 at this position of the three-way valve 3 under a certain shut-off pressure difference.

[0073] The load test method of the three-way valve 3 is as follows: the opening of the three-way valve 3 is set to connect branch 1 30 and close branch 2 40; the fluid medium enters from the inlet of the three-way valve 3 under the drive of the water pump 1, passes through the first outlet and branch 1 30, and enters the main circuit 20; the initial flow is adjusted by the main regulating valve 43 on the main circuit 20, and the branch regulating valve 1 42 of branch 1 30 adjusts the shut-off pressure difference, and the torque value of the three-way valve 3 at this time is recorded; similarly, the branch 2 40 is tested; the three-way valve 3 itself is adjusted to different openings by manual or electric means, and the force value or torque value of the three-way valve 3 at each opening is recorded.

[0074] The life reliability test method of the three-way valve 3 is to adjust the required initial flow and shut-off pressure difference through the coordination of the main regulating valve 43, the branch regulating valve 1 42, and the branch regulating valve 2 41, and control the three-way valve 3 to perform a circulation operation, that is, the branch 1 30 and the branch 2 40 are respectively connected to the main circuit 20 to perform a circulation operation as required, to test whether the expected life can be achieved; under normal circumstances, the number of circulation operations is at least tens of thousands times.

[0075] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A three-way valve performance test system, characterized in that: It includes a main circuit connected to the inlet of the three-way valve, a branch one connected to the first outlet of the three-way valve and respectively connected to the main circuit, a branch two connected to the second outlet of the three-way valve and respectively connected to the main circuit, branch test components respectively arranged on the branch one and the branch two, a main test component arranged on the main circuit, a water pump arranged on the main circuit, and a control unit respectively connected to the main test component and the branch test component.

2. A three-way valve performance testing system according to claim 1, characterized in that: The branch test assembly includes a branch pressure sensor for testing the pressure at the first outlet or the second outlet, a branch flow sensor and a branch regulating valve for monitoring the flow of the fluid medium in branch one or branch two; the branch pressure sensor and the branch regulating valve are arranged in sequence along the flow direction of the fluid medium, and the branch flow sensor is arranged between the branch pressure sensor and the branch regulating valve or on the side of the branch regulating valve away from the branch pressure sensor.

3. A three-way valve performance testing system according to claim 1, characterized in that: The main test assembly includes a main pressure sensor for monitoring the pressure at the inlet of the three-way valve, a main flow sensor for monitoring the flow of the fluid medium in the main circuit, a temperature sensor for monitoring the temperature of the fluid medium and a main regulating valve; The main pressure sensor is arranged between the water pump and the three-way valve.

4. A three-way valve performance testing system according to claim 3, characterized in that: The main regulating valve is arranged on a side of the water pump away from the main pressure sensor; the temperature sensor is arranged between the main regulating valve and the water pump; The main flow sensor is arranged on a side of the main regulating valve away from the temperature sensor.

5. A three-way valve performance testing system according to claim 3, characterized in that: It also includes a buffer voltage stabilizing device connected to the main circuit, and the buffer voltage stabilizing device is provided with a filling and draining valve and an exhaust valve; The connection point between the buffer pressure stabilizing device and the main circuit is arranged between the temperature sensor and the main regulating valve.

6. A three-way valve performance testing system according to claim 3, characterized in that: It also includes a filter assembly that is arranged on the main circuit and located between the connection point between the buffer voltage stabilizing device and the main circuit and the temperature sensor.

7. A three-way valve performance testing system according to claim 1, characterized in that: Also included is a force sensor or torque sensor for testing the load of a three-way valve.

8. A three-way valve performance testing system according to claim 1, characterized in that: It also includes a radiator which is arranged on the main circuit and close to the connection point between the main circuit and the first branch and the second branch.

9. A testing method for a three-way valve performance testing system based on any one of claims 1 to 8, characterized in that: The specific steps include: Close one set of branch regulating valves and open the other set of branch regulating valves to test the flow resistance characteristics, shut-off pressure difference, internal leakage and load of the three-way valve; When testing the flow resistance characteristics of the three-way valve, the flow rate of the fluid medium in the main circuit is adjusted by the main regulating valve, and the main flow sensor measures the flow rate of the fluid medium in the main circuit and records the flow data; the pressure sensor performs a pressure test to obtain the pressure at the outlet and inlet connected to the three-way valve; Calculate the pressure difference between the inlet pressure and the outlet pressure of the branch connected to the main circuit to obtain the flow resistance of the three-way valve at this flow rate; During the three-way valve shut-off pressure differential test, adjust the main regulating valve and the branch regulating valve on the branch connected to the main circuit; the main flow sensor tests the flow data of the fluid medium in the main circuit; obtain the pressure at the inlet of the three-way valve and the outlet of the three-way valve corresponding to the unconnected branch, and calculate the pressure differential to obtain the shut-off pressure differential of the unconnected branch of the three-way valve; When testing the internal leakage of the three-way valve, adjust the flow rate of the fluid medium in the main circuit through the main regulating valve; adjust the branch regulating valve on the branch connected to the three-way valve to adjust the shut-off pressure difference; record the flow rate of the branch not connected to the three-way valve, which is the internal leakage of the three-way valve at this position under the shut-off pressure difference; When conducting a load test on a three-way valve, adjust the flow rate of the fluid medium in the main circuit through the main regulating valve; adjust the branch regulating valve on the branch connected to the three-way valve to adjust the shut-off pressure difference, and record the monitoring value of the force sensor or torque sensor; adjust the three-way valve to different openings, and record the force value or torque value of the three-way valve at each opening.

10. A testing method for a three-way valve performance testing system according to claim 9, characterized in that: It also includes adjusting the initial flow and shut-off pressure difference through the main regulating valve and the branch regulating valve, controlling the three-way valve for cyclic operation, and testing the service life of the three-way valve.

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