Debugging and testing device and debugging and testing method for pressure reducing valve of liquid attitude control system

Abstract

The invention provides a debugging test device and a debugging test method for a pressure reducing valve of a liquid attitude control system, the debugging test device is used for testing a to-be-tested pressure reducing valve, and the debugging test device comprises a test gas table used for installing test pressure reducing valve gas cylinders, and at least two gas cylinders are arranged at two sides of the test gas table; the electromagnetic valves comprise at least one normally-open electromagnetic valve and at least one normally-closed electromagnetic valve, and the normally-open electromagnetic valves and the normally-closed electromagnetic valves are arranged at an inlet and an outlet of the test gas table respectively; the safety valve is arranged between the gas cylinder and the pressure measuring valve; the gas pipe is arranged among the gas cylinder, the normally-open solenoid valve, the normally-closed solenoid valve, the safety valve and the test gas table and is used for communicating the gas cylinder, the normally-open solenoid valve, the normally-closed solenoid valve, the safety valve and the test gas table; and the stop valve is arranged among the gas cylinder, the safety valve and the test gas table and is used for controlling connection and disconnection among the gas cylinder, the safety valve and the test gas table. The pressure reducing valve can be debugged, and it is guaranteed that the quality of the pressure reducing valve meets the actual requirement.

Description

Technical Field

[0001] This application relates to the field of debugging and testing pressure reducing valves for aerospace applications, specifically to a debugging and testing device and method for a pressure reducing valve in a liquid attitude control system. Background Technology

[0002] Liquid attitude and orbit control propulsion systems are propulsion devices that provide power for spacecraft orbit control, attitude control, spacecraft docking and rendezvous. They are characterized by multiple pulse activations in the space environment and are widely used for satellite orbit positioning, attitude adjustment, and spacecraft flight control. They have a wide range of applications, many varieties, large quantities, and high requirements in the aerospace field.

[0003] The liquid attitude control propulsion system mainly consists of gas cylinders, storage tanks, piping components, pressure reducing valves, and a liquid engine. The pressure reducing valve's primary function is to reduce the gas pressure in the cylinders to the system's rated pressure for the extrusion of propellant from the storage tanks and the opening of engine valves. Simultaneously, it must ensure gas cleanliness to prevent impurities from causing valve jamming and affecting engine performance. Therefore, the performance of the pressure reducing valve directly affects whether the system can complete its intended tasks; instability in its performance can even pose safety risks.

[0004] In view of this, the present invention is hereby proposed. Summary of the Invention

[0005] This application provides a debugging and testing device and method for pressure reducing valves in liquid attitude control systems, which is mainly to solve the problem that the performance of pressure reducing valves in existing liquid attitude control power systems cannot meet the system requirements.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] This application provides a testing and debugging device for a pressure reducing valve in a liquid attitude control system, used to test the pressure reducing valve under test, comprising:

[0008] Test gas stand: used to install the test pressure reducing valve.

[0009] Gas cylinders: At least two of the gas cylinders are arranged on both sides of the test gas platform;

[0010] Solenoid valve: including at least one normally open solenoid valve and at least one normally closed solenoid valve, wherein the normally open solenoid valve and the normally closed solenoid valve are respectively disposed at the inlet and outlet of the test gas platform;

[0011] Safety valve: located between the gas cylinder and the pressure measuring valve;

[0012] Air tube: disposed between the gas cylinder, the normally open solenoid valve, the normally closed solenoid valve, the safety valve and the test gas platform, connecting the gas cylinder, the normally open solenoid valve, the normally closed solenoid valve, the safety valve and the test gas platform;

[0013] Shut-off valve: Located between the gas cylinder, the safety valve, and the test gas platform, it controls the connection and disconnection between the gas cylinder, the safety valve, and the test gas platform.

[0014] This application also provides a debugging and testing method for the aforementioned debugging and testing device for a pressure reducing valve in a liquid attitude control system, which includes the following steps:

[0015] Install the pressure reducing valve to be tested onto the test gas platform and supply gas;

[0016] By adjusting the switch of the shut-off valve, pressure is applied to the diaphragm of the pressure reducing valve to shape the diaphragm.

[0017] The preload of the main spring of the pressure reducing valve is adjusted by adjusting the shut-off valve, gas cylinder, and safety valve.

[0018] The performance of the pressure reducing valve is tested by adjusting the shut-off valve, gas cylinder, and safety valve.

[0019] In one specific implementation scheme, installing the pressure reducing valve to be tested onto the test gas platform includes the following steps:

[0020] Nitrogen gas is connected to one end of the first shut-off valve. Clean nitrogen gas is used to purge the gas pipe, gas cylinder, test gas platform, solenoid valve, safety valve and shut-off valve until no foreign matter is found on the dust-free cloth at the gas outlet after observation with a magnifying glass.

[0021] The interface of the pressure reducing valve was cleaned with a clean, lint-free cloth dampened with anhydrous ethanol. After observing with a magnifying glass to ensure there were no foreign objects, the pressure reducing valve was installed onto the interface of the test gas platform with a torsional torque of 35-50 N·m.

[0022] In one specific implementation, the step of pressurizing the diaphragm of the pressure-reducing valve by adjusting the switch of the shut-off valve to shape the diaphragm includes the following steps:

[0023] Close the shut-off valve, normally open solenoid valve and normally closed solenoid valve, open the first shut-off valve and the second shut-off valve in sequence, turn on the booster pump to fill the first gas cylinder with gas until the pressure displayed on the first pressure gauge is 55MPa, and then close the second shut-off valve, the booster pump and the first shut-off valve in sequence.

[0024] Open the third shut-off valve, close the normally open solenoid valve, open the normally closed solenoid valve, apply gas pressure to the diaphragm of the test pressure reducing valve, maintain the pressure for 4-6 minutes, close the normally closed solenoid valve, and then open the eighth shut-off valve and the normally open solenoid valve in sequence to release the pressure to 0.

[0025] Repeat the above operation 5-8 times to test the diaphragm formation of the pressure reducing valve.

[0026] In a specific feasible implementation, adjusting the preload of the main spring of the pressure reducing valve by adjusting the shut-off valve, gas cylinder, and safety valve includes the following steps:

[0027] Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the eighth shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the second pressure gauge shows a pressure of 24-26 MPa.

[0028] Open the normally closed solenoid valve, observe the third pressure gauge, and close the normally closed solenoid valve after 20 seconds.

[0029] Observe the third pressure gauge and adjust the preload of the main spring of the pressure reducing valve.

[0030] In one specific feasible implementation, observing the third pressure gauge and adjusting the main spring preload of the test pressure reducing valve includes the following steps:

[0031] When the reading on the third pressure gauge is less than 4.1 MPa, increase the preload of the main spring.

[0032] When the reading on the third pressure gauge is greater than 4.1 MPa, reduce the preload of the main spring.

[0033] Open the normally closed solenoid valve, observe the third pressure gauge, and close the normally closed solenoid valve after 20 seconds.

[0034] Adjust the main spring preload until the reading on the third pressure gauge is 4.0-4.2 MPa.

[0035] In a specific feasible implementation, testing the performance of the pressure reducing valve by adjusting the shut-off valve, gas cylinder, and safety valve includes the following steps:

[0036] Maximum flow rate outlet stress test:

[0037] Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the seventh shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the second pressure gauge shows a pressure of 24-26 MPa.

[0038] Open the normally closed solenoid valve, observe the third pressure gauge, and close the normally closed solenoid valve after 20 seconds.

[0039] Observe the value displayed on the third pressure gauge, and adjust the main spring preload of the pressure reducing valve by adjusting the shut-off valve, gas cylinder, and safety valve until the value displayed on the third pressure gauge is 4.0-4.2 MPa;

[0040] Minimum flow rate outlet stress test:

[0041] Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the ninth shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the second pressure gauge shows a pressure of 24-26 MPa.

[0042] Open the normally closed solenoid valve, observe the third pressure gauge, and close the normally closed solenoid valve after 20 seconds.

[0043] Observe the value displayed on the third pressure gauge, and adjust the main spring preload of the pressure reducing valve by adjusting the shut-off valve, gas cylinder, and safety valve until the value displayed on the third pressure gauge is 4.0-4.2 MPa;

[0044] Lockout pressure test:

[0045] Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the eighth shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the second pressure gauge shows a pressure of 24-26 MPa.

[0046] Open the normally closed solenoid valve, observe the third pressure gauge, and close the normally open solenoid valve after 10 seconds.

[0047] Observe the value displayed on the third pressure gauge, and adjust the main spring preload of the pressure reducing valve by adjusting the shut-off valve, gas cylinder, and safety valve until the value displayed on the third pressure gauge is less than 4.5 MPa.

[0048] In one specific feasible implementation, the following steps are included after the lockout pressure test:

[0049] Impact test of pressure reducing valve:

[0050] Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves, open the first shut-off valve and the second shut-off valve in sequence, turn on the booster pump, and fill the first gas cylinder with gas until the pressure displayed on the first pressure gauge is 50MPa, then close the second shut-off valve, the booster pump and the first shut-off valve in sequence.

[0051] Open the eighth shut-off valve and the normally open solenoid valve, close the normally closed solenoid valve, and open the third shut-off valve until the pressure on the second pressure gauge is 49-51 MPa.

[0052] Open the normally closed solenoid valve, perform an impact test on the pressure reducing valve, and close the normally closed solenoid valve after 15 seconds.

[0053] Repeat the cycle five times to complete the impact test of the pressure reducing valve.

[0054] The performance of the pressure reducing valve is tested by adjusting the shut-off valve, gas cylinder, and safety valve.

[0055] In one specific feasible implementation, the following steps are included after the pressure reducing valve impact test:

[0056] Pressure characteristic test of pressure reducing valve:

[0057] Pressure characteristic test of pressure reducing valve under nominal flow rate:

[0058] Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves, open the first shut-off valve and the second shut-off valve in sequence, turn on the booster pump, and fill the first gas cylinder with gas until the pressure displayed on the first pressure gauge is 55MPa, then close the second shut-off valve, the booster pump and the first shut-off valve in sequence.

[0059] Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the eighth shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the pressure on the second pressure gauge is 49-51 MPa.

[0060] Open the normally closed solenoid valve, and after 10 seconds, record the readings of the second and third pressure gauges for the first time. Close the normally open solenoid valve, and record the reading of the third pressure gauge minus the locking pressure value for the second time.

[0061] Repeat the above operation, and perform a test every 5 MPa pressure. For each test, record the displayed values ​​of the second and third pressure gauges and the lockout pressure value.

[0062] Pressure characteristic test of pressure reducing valve at maximum flow rate:

[0063] Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves, open the first shut-off valve and the second shut-off valve in sequence, turn on the booster pump, and fill the first gas cylinder with gas until the pressure displayed on the first pressure gauge is 55MPa, then close the second shut-off valve, the booster pump and the first shut-off valve in sequence.

[0064] Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the seventh shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the pressure on the second pressure gauge is 49-51 MPa.

[0065] Open the normally closed solenoid valve, and after 10 seconds, record the readings of the second and third pressure gauges for the first time. Close the normally open solenoid valve, and record the reading of the third pressure gauge minus the locking pressure value for the second time.

[0066] Repeat the above operation, and perform a test every 5 MPa pressure. For each test, record the displayed values ​​of the second and third pressure gauges and the lockout pressure value.

[0067] Pressure characteristic test of pressure reducing valve at minimum flow rate:

[0068] Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves, open the first shut-off valve and the second shut-off valve in sequence, turn on the booster pump, and fill the first gas cylinder with gas until the pressure displayed on the first pressure gauge is 55MPa, then close the second shut-off valve, the booster pump and the first shut-off valve in sequence.

[0069] Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the ninth shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the pressure on the second pressure gauge is 49-51 MPa.

[0070] Open the normally closed solenoid valve, and after 10 seconds, record the readings of the second and third pressure gauges for the first time. Close the normally open solenoid valve, and record the reading of the third pressure gauge minus the locking pressure value for the second time.

[0071] Repeat the above operation, and perform a test every 5 MPa. For each test, record the readings of the second and third pressure gauges and the lockout pressure value.

[0072] In one specific feasible implementation, the following steps are included after testing the pressure characteristics of the pressure reducing valve:

[0073] Stop the gas supply and close all shut-off valves, normally open solenoid valves, and normally closed solenoid valves.

[0074] Open the first shut-off valve, the tenth shut-off valve, the second shut-off valve, the eleventh shut-off valve, the fourth shut-off valve, the eighth shut-off valve, the normally open solenoid valve, the normally closed solenoid valve, and the twelfth solenoid valve in sequence.

[0075] Remove the test pressure reducing valve and put a clean protective cap on the test pressure reducing valve interface;

[0076] Open the normally open solenoid valve and close all shut-off valves and normally closed solenoid valves.

[0077] Wear a clean protective cap on the interface of the test gas platform.

[0078] Compared with the prior art, this application has at least the following advantages:

[0079] 1. The diaphragm of the pressure reducing valve tested in this application is a planar metal diaphragm, which is formed by pneumatic compression before debugging to reduce the requirements for diaphragm assembly accuracy;

[0080] 2. The first, second, and third pressure sensors in this application can be connected to a transmitter, and data processing via software can achieve automatic data acquisition for pressure reducing valve performance debugging. If integrated with solenoid valve control, it can realize automatic testing of the pressure reducing valve.

[0081] 3. This application can extend the connecting pipeline between the test pressure reducing valve and the debugging test device, and then work in conjunction with high and low temperature equipment, damp heat equipment, etc., to complete the pressurized environment test of the test pressure reducing valve. Attached Figure Description

[0082] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0083] Figure 1 This is a schematic diagram of the debugging and testing device for the pressure reducing valve of the liquid attitude control system provided in the embodiments of this application.

[0084] in:

[0085] First shut-off valve -1; Second shut-off valve -2; Third shut-off valve -3; Fourth shut-off valve -4; Normally closed solenoid valve -5; Normally open solenoid valve -6; Seventh shut-off valve -7; Eighth shut-off valve -8; Ninth shut-off valve -9; Tenth shut-off valve -10; Eleventh shut-off valve -11; Twelfth shut-off valve -12; First gas cylinder -13; Second gas cylinder -14; Test gas platform -15; Test pressure reducing valve -16; Booster pump -17; First pressure gauge -18; Second pressure gauge -19; Third pressure gauge -20; First pressure sensor -21; Second pressure sensor -22; Third pressure sensor -23; First safety valve -24; Second safety valve -25; First pressure reducing valve -26; Filter -27; High flow orifice plate -28; Nominal flow orifice plate -29; Low flow orifice plate -30. Detailed Implementation

[0086] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of the present invention, but not all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0087] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0088] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; they can refer to mechanical connection or electrical connection; they can refer to direct connection or indirect connection through an intermediate medium; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0089] To more clearly illustrate the technical solutions in this invention, specific embodiments are described below.

[0090] Example 1

[0091] This embodiment provides a debugging and testing device for a pressure reducing valve in a liquid attitude control system. The debugging and testing device is composed of a safety valve, a test pressure reducing valve 16, a shut-off valve, a gas cylinder, a solenoid valve, and a test gas platform 15 connected by an air pipe.

[0092] like Figure 1 As shown, the shut-off valves include first shut-off valves 1 to 4 and seventh shut-off valves 7 to 12; the solenoid valves include normally closed solenoid valves 5 and normally open solenoid valves 6; the gas cylinders include first gas cylinder 13 and second gas cylinder 14; and the safety valves include first safety valve 24 and second safety valve 25.

[0093] The gas source interface is connected to one end of the first shut-off valve 1. The other end of the first shut-off valve 1 can be connected to one end of the tenth shut-off valve 10, which is the gas outlet. The other end of the first shut-off valve 1 is sequentially connected to one end of the booster pump 17, the second shut-off valve 2, the first gas cylinder 13, the first pressure gauge 18, and the first safety valve 24. The other end of the first safety valve 24 can be connected to the gas outlet through the eleventh shut-off valve 11. The other end of the first safety valve 24 can also be connected to the second pressure gauge 19 through the third shut-off valve 3. The other end of the first safety valve 24 can also be connected to the second pressure gauge 19 through the first safety valve 24 and the fourth shut-off valve 4. The second pressure gauge 19 is connected to the first normally closed solenoid valve 5. One end of the normally closed solenoid valve 5 is connected to the outlet via the twelfth shut-off valve 12. The other end of the normally closed solenoid valve 5 is also connected to the interface (inlet) of one end of the test pressure reducing valve 16 via the interface on the test gas platform 15. The other end of the test pressure reducing valve 16 is connected to the second gas cylinder 14 via the interface (outlet). The second gas cylinder 14 is connected in sequence to one end of the second safety valve 25, the third pressure gauge 20, the normally open solenoid valve 6, and the filter 27. The other end of the filter 27 is connected to the outlet via the seventh shut-off valve 7 and the large flow orifice plate 28; to the outlet via the eighth shut-off valve 8 and the nominal flow orifice plate 29; and to the outlet via the ninth shut-off valve 9 and the small flow orifice plate 30.

[0094] The debugging and testing device provided in this application is consistent with the above description of the internal airflow direction, and can be controlled by the tenth shut-off valve 10, the eleventh shut-off valve 11, the twelfth shut-off valve 12, the seventh shut-off valve 7, the eighth shut-off valve 8, and the ninth shut-off valve 9 to determine whether it is connected to the atmosphere through the air outlet. A nitrogen source is connected to the gas source interface for gas supply. The first pressure gauge 18 displays the pressure sensed by the first pressure sensor 21, the second pressure gauge 19 displays the pressure sensed by the second pressure sensor 22, and the third pressure gauge 20 displays the pressure sensed by the third sensor.

[0095] Of course, it should be noted that in this example, the accuracy of the first pressure gauge 18 and the second pressure gauge 19 is 0.5 grade, the accuracy of the third pressure gauge 20 is 0.25 grade, the accuracy of the first pressure sensor 21 and the second pressure sensor 22 is 0.5 grade, the accuracy of the third pressure sensor 23 is 0.25 grade, the accuracy of the filter 27 is 10μm, the pressure range of the first pressure reducing valve 26 is 0-60MPa, and the accuracy is ±1%; the maximum pressure of the booster pump 17 is not less than 55MPa; the volume of the first gas cylinder 13 is determined according to the test requirements, and is greater than or equal to 20L, with a pressure resistance of... The pressure resistance is greater than or equal to 80 MPa; the volume of the second gas cylinder 14 is the total volume of the entire cavity, and its pressure resistance is not less than 10 MPa; the opening pressure of the first safety valve 24 is 60 MPa; the opening pressure of the second safety valve 25 is 6 MPa; the pressure resistance of the gas pipe in the high-pressure area is not less than 80 MPa; the pressure resistance of the gas pipe in the low-pressure area is not less than 15 MPa; the orifice diameter of the large-flow orifice plate 28 matches the maximum gas flow rate under the working conditions of the debugging and testing device; the orifice diameter of the nominal-flow orifice plate 29 matches the rated gas flow rate under the working conditions of the debugging and testing device; and the orifice diameter of the small-flow orifice plate 30 matches the minimum gas flow rate under the working conditions of the debugging and testing device. Before setting up the debugging and testing device, all gas pipes, safety valves, shut-off valves, gas cylinders, solenoid valves, and test gas platform 15 must be cleaned with clean anhydrous ethanol. 100 mL of the cleaned anhydrous ethanol should be taken and tested with a particle size analyzer. No particles larger than 25 μm should be present; otherwise, rinsing should continue until the requirements are met. During the assembly, commissioning, and testing of the equipment, all interfaces must be cleaned with a clean, lint-free cloth dampened with anhydrous ethanol before connection. A 30x magnifying glass should be used to inspect for any visible foreign matter. The tightening torque for high-pressure area connectors should be 60 N·m-80 N·m, and for low-pressure area connectors, 35 N·m-50 N·m. After the commissioning and testing equipment is assembled, a helium mass spectrometer must be used for leak detection; the leak rate must not exceed 2 × 10⁻⁶ Pa·m. 3 / s.

[0096] The pressure reducing valve 16 mentioned in this application is a pressure reducing valve in a liquid attitude control power system. The pressure reducing valve 16 uses a flat metal diaphragm with an inlet pressure range of 6MPa-50MPa, a designed rated outlet pressure of 4.1MPa±0.1MPa, and a lockout pressure not exceeding 4.5MPa. A commissioning and testing device is required to form the diaphragm and test its nominal outlet pressure, maximum flow outlet pressure, minimum flow outlet pressure, and lockout pressure. An impact test is also required. At the same time, the cleanliness of the system must be ensured, and there must be no particles larger than 25μm inside the pressure reducing valve 16.

[0097] This application also provides a debugging and testing method for the debugging and testing device provided above, which includes the following steps:

[0098] 1. Clean, debug, and test the equipment:

[0099] Connect the nitrogen source to the gas source interface connected to one end of the first shut-off valve 1. Use clean nitrogen to purge the gas pipe, gas cylinder, test gas platform 15, solenoid valve, safety valve, and shut-off valve. During purging, all gas outlets must be covered with a clean, lint-free cloth. The purging pressure is 1 MPa, and the purging time is 3 minutes. After purging, remove the clean, lint-free cloth and observe it with a 30x magnifying glass. There should be no visible foreign matter on the lint-free cloth. If there is, purge again until there is no foreign matter on the lint-free cloth at the gas outlet after observation with a magnifying glass. When the nitrogen source is a gas cylinder, the gas cylinder pressure should not be lower than 10 MPa.

[0100] The interface of the pressure reducing valve 16 was wiped with a clean, lint-free cloth dampened with anhydrous ethanol. After observing that there were no foreign objects with a 30x magnifying glass, the pressure reducing valve 16 was installed onto the interface of the test gas platform 15 with a torsional torque of 35-50 N·m.

[0101] 2. By adjusting the switch of the shut-off valve, pressure is applied to the diaphragm of the test pressure reducing valve 16 to form the diaphragm:

[0102] Close the shut-off valve, normally open solenoid valve 6 and normally closed solenoid valve 5, open the first shut-off valve 1 and the second shut-off valve 2 in sequence, turn on the booster pump 17 to fill the first gas cylinder 13 with gas until the pressure displayed on the first pressure gauge is 55MPa, and then close the second shut-off valve 2, booster pump 17 and the first shut-off valve 1 in sequence.

[0103] Open the third shut-off valve 3, close the normally open solenoid valve 6, open the normally closed solenoid valve 5, apply gas pressure to the diaphragm of the test pressure reducing valve 16, maintain the pressure for 4-6 minutes, close the normally closed solenoid valve 5, and then open the eighth shut-off valve 8 and the normally open solenoid valve 6 in sequence to release the pressure to 0.

[0104] Repeat the above operation 5-8 times to test the diaphragm formation of pressure reducing valve 16;

[0105] 3. Adjust the preload of the main spring of the pressure reducing valve 16 by adjusting the shut-off valve, gas cylinder, and safety valve:

[0106] Close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5, open the eighth shut-off valve 8, normally open solenoid valve 6 and fourth shut-off valve 4 in sequence, close the normally closed solenoid valve 5, and adjust the first pressure reducing valve until the second pressure gauge 19 shows a pressure of 24-26 MPa.

[0107] Open the normally closed solenoid valve 5, observe the third pressure gauge 20, and close the normally closed solenoid valve 5 after 20 seconds.

[0108] Observe the third pressure gauge 20 and adjust the preload of the main spring of the pressure reducing valve 16:

[0109] When the reading on the third pressure gauge 20 is less than 4.1 MPa, increase the preload of the main spring;

[0110] When the reading on the third pressure gauge 20 is greater than 4.1 MPa, reduce the preload of the main spring;

[0111] Open the normally closed solenoid valve 5, observe the third pressure gauge 20, and close the normally closed solenoid valve 5 after 20 seconds.

[0112] If the reading on the third pressure gauge 20 is not within the range of 4.0-4.2 MPa, adjust the preload of the main spring until the reading on the third pressure gauge 20 is 4.0-4.2 MPa.

[0113] It should be noted that the preload of the main spring is adjusted by rotating the main spring adjusting screw, and the rotation angle of the main spring adjusting screw is 30-45°.

[0114] 4. Test the performance of pressure reducing valve 16 by adjusting the shut-off valve, gas cylinder, and safety valve:

[0115] Maximum flow rate outlet stress test:

[0116] Close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5, then open the seventh shut-off valve 7, normally open solenoid valve 6 and fourth shut-off valve 4 in sequence, close the normally closed solenoid valve 5, and adjust the first pressure reducing valve 26 until the second pressure gauge 19 shows a pressure of 24-26 MPa.

[0117] Open the normally closed solenoid valve 5, observe the third pressure gauge 20, and close the normally closed solenoid valve 5 after 20 seconds.

[0118] Observe the value displayed by the third pressure gauge 20. If the value displayed by the third pressure gauge 20 is not within the range of 4.0-4.2MPa, repeat step (3) until the value displayed by the third pressure gauge 20 is 4.0-4.2MPa.

[0119] Minimum flow rate outlet stress test:

[0120] Close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5, then open the ninth shut-off valve 9, normally open solenoid valve 6 and fourth shut-off valve 4 in sequence, close the normally closed solenoid valve 5, and adjust the first pressure reducing valve 26 until the second pressure gauge 19 shows a pressure of 24-26 MPa.

[0121] Open the normally closed solenoid valve 5, observe the third pressure gauge 20, and close the normally closed solenoid valve 5 after 20 seconds.

[0122] If the value displayed by the third pressure gauge 20 is not within the range of 4.0-4.2 MPa, repeat step (3) until the value displayed by the third pressure gauge 20 is 4.0-4.2 MPa.

[0123] Lockout pressure test:

[0124] Close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5, open the eighth shut-off valve 8, normally open solenoid valve 6 and fourth shut-off valve 4 in sequence, close the normally closed solenoid valve 5, and adjust the first pressure reducing valve until the second pressure gauge 19 shows a pressure of 24-26 MPa.

[0125] Open the normally closed solenoid valve 5, observe the third pressure gauge 20, and close the normally open solenoid valve 6 after 10 seconds.

[0126] Observe the value displayed by the third pressure gauge 20. If the value displayed by the third pressure gauge 20 is greater than 4.5 MPa, repeat step (3) until the value displayed by the third pressure gauge 20 is less than 4.5 MPa.

[0127] 5. Impact test of pressure reducing valve 16:

[0128] Close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5, open the first shut-off valve 1 and the second shut-off valve 2 in sequence, turn on the booster pump 17, and fill the first gas cylinder 13 with gas until the pressure displayed on the first pressure gauge is 50MPa, then close the second shut-off valve 2 and the booster pump 17 and the first shut-off valve 1 in sequence.

[0129] Open the eighth shut-off valve 8 and the normally open solenoid valve 6, close the normally closed solenoid valve 5, and open the third shut-off valve 3 until the pressure of the second pressure gauge 19 is 49-51 MPa.

[0130] Quickly open the normally closed solenoid valve 5, impact test the pressure reducing valve 16, and close the normally closed solenoid valve 5 after 15 seconds.

[0131] The test was repeated five times to complete the impact test of pressure reducing valve 16.

[0132] Repeat step (4) to retest the performance of the pressure reducing valve 16;

[0133] 6. Pressure characteristic test of pressure reducing valve 16:

[0134] Pressure characteristic test of pressure reducing valve 16 under nominal flow rate:

[0135] Close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5, open the first shut-off valve 1 and the second shut-off valve 2 in sequence, turn on the booster pump 17, and fill the first gas cylinder 13 with gas until the pressure displayed on the first pressure gauge is 55MPa, then close the second shut-off valve 2 and the booster pump 17 and the first shut-off valve 1 in sequence.

[0136] Close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5, open the eighth shut-off valve 8, normally open solenoid valve 6 and fourth shut-off valve 4 in sequence, close the normally closed solenoid valve 5, and adjust the first pressure reducing valve 26 until the pressure of the second pressure gauge 19 is 49-51 MPa.

[0137] Open the normally closed solenoid valve 5, and after 10 seconds, record the displayed values ​​of the second pressure gauge 19 and the third pressure gauge 20 for the first time. Close the normally open solenoid valve 6, and record the displayed value of the third pressure gauge 20 minus the lockout pressure value for the second time.

[0138] Repeat the above operation, and perform a test every 5 MPa pressure. For each test, record the displayed values ​​of the second pressure gauge 19 and the third pressure gauge 20, as well as the lock-up pressure value.

[0139] Pressure characteristic test of pressure reducing valve 16 at maximum flow rate:

[0140] Close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5, open the first shut-off valve 1 and the second shut-off valve 2 in sequence, turn on the booster pump 17, and fill the first gas cylinder 13 with gas until the pressure displayed on the first pressure gauge is 55MPa, then close the second shut-off valve 2 and the booster pump 17 and the first shut-off valve 1 in sequence.

[0141] Close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5, open the seventh shut-off valve 7, normally open solenoid valve 6 and fourth shut-off valve 4 in sequence, close the normally closed solenoid valve 5, and adjust the first pressure reducing valve 26 until the pressure of the second pressure gauge 19 is 49-51 MPa.

[0142] Open the normally closed solenoid valve 5, and after 10 seconds, record the displayed values ​​of the second pressure gauge 19 and the third pressure gauge 20 for the first time. Close the normally open solenoid valve 6, and record the displayed value of the third pressure gauge 20 minus the lockout pressure value for the second time.

[0143] Repeat the above operation, and perform a test every 5 MPa pressure. For each test, record the displayed values ​​of the second pressure gauge 19 and the third pressure gauge 20, as well as the lock-up pressure value.

[0144] Pressure characteristic test of pressure reducing valve 16 at minimum flow rate:

[0145] Close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5, open the first shut-off valve 1 and the second shut-off valve 2 in sequence, turn on the booster pump 17, and fill the first gas cylinder 13 with gas until the pressure displayed on the first pressure gauge is 55MPa, then close the second shut-off valve 2 and the booster pump 17 and the first shut-off valve 1 in sequence.

[0146] Close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5, open the ninth shut-off valve 9, normally open solenoid valve 6 and fourth shut-off valve 4 in sequence, close the normally closed solenoid valve 5, and adjust the first pressure reducing valve 26 until the pressure of the second pressure gauge 19 is 49-51 MPa.

[0147] Open the normally closed solenoid valve 5, and after 10 seconds, record the displayed values ​​of the second pressure gauge 19 and the third pressure gauge 20 for the first time. Close the normally open solenoid valve 6, and record the displayed value of the third pressure gauge 20 minus the lockout pressure value for the second time.

[0148] Repeat the above operation, and perform a test every 5 MPa pressure. For each test, record the displayed values ​​of the second pressure gauge 19 and the third pressure gauge 20, as well as the lock-up pressure value.

[0149] 7. Remove the test pressure reducing valve 16:

[0150] Stop the gas supply and close all shut-off valves, normally open solenoid valve 6 and normally closed solenoid valve 5.

[0151] Open the first shut-off valve 1, the tenth shut-off valve 10, the second shut-off valve 2, the eleventh shut-off valve 11, the fourth shut-off valve 4, the eighth shut-off valve 8, the normally open solenoid valve 6, the normally closed solenoid valve 5, and the twelfth solenoid valve in sequence to reduce the pressure in the entire device and the test pressure reducing valve 16 to 0.

[0152] Remove the test pressure reducing valve 16 and put a clean protective cap on the interface of the test pressure reducing valve 16;

[0153] Open normally open solenoid valve 6, and close all shut-off valves and normally closed solenoid valve 5.

[0154] Put a clean protective cap on the interface on the test gas platform 15.

[0155] The debugging and testing device for a pressure reducing valve in a liquid attitude control system provided in this application has at least the following beneficial effects:

[0156] 1. The diaphragm of the pressure reducing valve 16 tested in this application is a planar metal diaphragm, which is formed by pneumatic compression before debugging to reduce the requirements for diaphragm assembly accuracy.

[0157] 2. The first pressure sensor 21, the second pressure sensor 22, and the third pressure sensor 23 in this application can be connected to a transmitter, and data processing using software can achieve automatic data acquisition for pressure reducing valve performance debugging. If integrated with solenoid valve control, it can realize automatic testing of the pressure reducing valve.

[0158] 3. This application can extend the connecting pipeline between the test pressure reducing valve 16 and the debugging test device, and then work in conjunction with high and low temperature equipment, damp heat equipment, etc., to complete the pressurized environment test of the test pressure reducing valve 16.

[0159] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. This application is not limited to the exact structures described above and illustrated in the accompanying drawings, and it should not be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art, various changes and modifications made without departing from the concept of this application should be considered to fall within the protection scope of this application.

Claims

1. A testing and debugging device for a pressure reducing valve in a liquid attitude control system, used to test a pressure reducing valve under test, characterized in that, include: Test gas stand: used to install the test pressure reducing valve. Gas cylinders: At least two of the gas cylinders are arranged on both sides of the test gas platform; Solenoid valve: including at least one normally open solenoid valve and at least one normally closed solenoid valve, wherein the normally open solenoid valve and the normally closed solenoid valve are respectively disposed at the inlet and outlet of the test gas platform; Safety valve: located between the gas cylinder and the pressure measuring valve; Air tube: disposed between the gas cylinder, the normally open solenoid valve, the normally closed solenoid valve, the safety valve and the test gas platform, connecting the gas cylinder, the normally open solenoid valve, the normally closed solenoid valve, the safety valve and the test gas platform; Shut-off valve: Located between the gas cylinder, the safety valve, and the test gas platform, it controls the connection and disconnection between the gas cylinder, the safety valve, and the test gas platform.

2. The debugging and testing method of the debugging and testing device for a pressure reducing valve in a liquid attitude control system as described in claim 1, characterized in that, Includes the following steps: Install the pressure reducing valve to be tested onto the test gas platform and supply gas; By adjusting the switch of the shut-off valve, pressure is applied to the diaphragm of the pressure reducing valve to shape the diaphragm. The preload of the main spring of the pressure reducing valve is adjusted by adjusting the shut-off valve, gas cylinder, and safety valve. The performance of the pressure reducing valve is tested by adjusting the shut-off valve, gas cylinder, and safety valve.

3. The debugging and testing method according to claim 2, characterized in that, The process of installing the pressure reducing valve to be tested onto the test gas platform includes the following steps: Nitrogen gas is connected to one end of the first shut-off valve. Clean nitrogen gas is used to purge the gas pipe, gas cylinder, test gas platform, solenoid valve, safety valve and shut-off valve until no foreign matter is found on the dust-free cloth at the gas outlet after observation with a magnifying glass. The interface of the pressure reducing valve was wiped with a clean, lint-free cloth dampened with anhydrous ethanol. After observing with a magnifying glass that there were no foreign objects, the pressure reducing valve was installed onto the interface of the test gas platform with a torsional torque of 35-50 N·m.

4. The debugging and testing method according to claim 2, characterized in that, The step of pressurizing the diaphragm of the pressure-reducing valve by adjusting the switch of the shut-off valve to form the diaphragm includes the following steps: Close the shut-off valve, normally open solenoid valve and normally closed solenoid valve, open the first shut-off valve and the second shut-off valve in sequence, turn on the booster pump to fill the first gas cylinder with gas until the pressure displayed on the first pressure gauge is 55MPa, and then close the second shut-off valve, the booster pump and the first shut-off valve in sequence. Open the third shut-off valve, close the normally open solenoid valve, open the normally closed solenoid valve, apply gas pressure to the diaphragm of the test pressure reducing valve, maintain the pressure for 4-6 minutes, close the normally closed solenoid valve, and then open the eighth shut-off valve and the normally open solenoid valve in sequence to release the pressure to 0. Repeat the above operation 5-8 times to test the diaphragm formation of the pressure reducing valve.

5. The debugging and testing method according to claim 2, characterized in that, The adjustment of the main spring preload of the pressure reducing valve by adjusting the shut-off valve, gas cylinder, and safety valve includes the following steps: Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the eighth shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the second pressure gauge shows a pressure of 24-26 MPa. Open the normally closed solenoid valve, observe the third pressure gauge, and close the normally closed solenoid valve after 20 seconds. Observe the third pressure gauge and adjust the preload of the main spring of the pressure reducing valve.

6. The debugging and testing method according to claim 5, characterized in that, The process of observing the third pressure gauge and adjusting the preload of the main spring of the pressure-reducing valve includes the following steps: When the reading on the third pressure gauge is less than 4.1 MPa, increase the preload of the main spring. When the reading on the third pressure gauge is greater than 4.1 MPa, reduce the preload of the main spring. Open the normally closed solenoid valve, observe the third pressure gauge, and close the normally closed solenoid valve after 20 seconds. Adjust the main spring preload until the reading on the third pressure gauge is 4.0-4.2 MPa.

7. The debugging and testing method according to claim 2, characterized in that, The process of testing the performance of the pressure reducing valve by adjusting the shut-off valve, gas cylinder, and safety valve includes the following steps: Maximum flow rate outlet stress test: Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the seventh shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the second pressure gauge shows a pressure of 24-26 MPa. Open the normally closed solenoid valve, observe the third pressure gauge, and close the normally closed solenoid valve after 20 seconds. Observe the value displayed on the third pressure gauge, and adjust the main spring preload of the pressure reducing valve by adjusting the shut-off valve, gas cylinder, and safety valve until the value displayed on the third pressure gauge is 4.0-4.2 MPa; Minimum flow rate outlet stress test: Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the ninth shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the second pressure gauge shows a pressure of 24-26 MPa. Open the normally closed solenoid valve, observe the third pressure gauge, and close the normally closed solenoid valve after 20 seconds. Observe the value displayed on the third pressure gauge, and adjust the main spring preload of the pressure reducing valve by adjusting the shut-off valve, gas cylinder, and safety valve until the value displayed on the third pressure gauge is 4.0-4.2 MPa; Lockout pressure test: Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the eighth shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the second pressure gauge shows a pressure of 24-26 MPa. Open the normally closed solenoid valve, observe the third pressure gauge, and close the normally open solenoid valve after 10 seconds. Observe the value displayed on the third pressure gauge, and adjust the main spring preload of the pressure reducing valve by adjusting the shut-off valve, gas cylinder, and safety valve until the value displayed on the third pressure gauge is less than 4.5 MPa.

8. The debugging and testing method according to claim 7, characterized in that, The following steps are included after the lockout pressure test: Impact test of pressure reducing valve: Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves, open the first shut-off valve and the second shut-off valve in sequence, turn on the booster pump, and fill the first gas cylinder with gas until the pressure displayed on the first pressure gauge is 50MPa, then close the second shut-off valve, the booster pump and the first shut-off valve in sequence. Open the eighth shut-off valve and the normally open solenoid valve, close the normally closed solenoid valve, and open the third shut-off valve until the pressure on the second pressure gauge is 49-51 MPa. Open the normally closed solenoid valve, perform an impact test on the pressure reducing valve, and close the normally closed solenoid valve after 15 seconds. Repeat the cycle five times to complete the impact test of the pressure reducing valve. The performance of the pressure reducing valve is tested by adjusting the shut-off valve, gas cylinder, and safety valve.

9. The debugging and testing method according to claim 8, characterized in that, The following steps are included after the pressure reducing valve impact test: Pressure characteristic test of pressure reducing valve: Pressure characteristic test of pressure reducing valve under nominal flow rate: Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves, open the first shut-off valve and the second shut-off valve in sequence, turn on the booster pump, and fill the first gas cylinder with gas until the pressure displayed on the first pressure gauge is 55MPa, then close the second shut-off valve, the booster pump and the first shut-off valve in sequence. Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the eighth shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the pressure on the second pressure gauge is 49-51 MPa. Open the normally closed solenoid valve. After 10 seconds, record the readings of the second and third pressure gauges for the first time. Close the normally open solenoid valve and record the reading of the third pressure gauge minus the locking pressure value for the second time. Repeat the above operation, and perform a test every 5 MPa pressure. For each test, record the displayed values ​​of the second and third pressure gauges and the lockout pressure value. Pressure characteristic test of pressure reducing valve at maximum flow rate: Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves, open the first shut-off valve and the second shut-off valve in sequence, turn on the booster pump, and fill the first gas cylinder with gas until the pressure displayed on the first pressure gauge is 55MPa, then close the second shut-off valve, the booster pump and the first shut-off valve in sequence. Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the seventh shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the pressure on the second pressure gauge is 49-51 MPa. Open the normally closed solenoid valve. After 10 seconds, record the readings of the second and third pressure gauges for the first time. Close the normally open solenoid valve and record the reading of the third pressure gauge minus the locking pressure value for the second time. Repeat the above operation, and perform a test every 5 MPa pressure. For each test, record the displayed values ​​of the second and third pressure gauges and the lockout pressure value. Pressure characteristic test of pressure reducing valve at minimum flow rate: Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves, open the first shut-off valve and the second shut-off valve in sequence, turn on the booster pump, and fill the first gas cylinder with gas until the pressure displayed on the first pressure gauge is 55MPa, then close the second shut-off valve, the booster pump and the first shut-off valve in sequence. Close all shut-off valves, normally open solenoid valves and normally closed solenoid valves. Open the ninth shut-off valve, normally open solenoid valve and fourth shut-off valve in sequence. Close the normally closed solenoid valve. Adjust the first pressure reducing valve until the pressure on the second pressure gauge is 49-51 MPa. Open the normally closed solenoid valve. After 10 seconds, record the readings of the second and third pressure gauges for the first time. Close the normally open solenoid valve and record the reading of the third pressure gauge minus the locking pressure value for the second time. Repeat the above operation, and perform a test every 5 MPa. For each test, record the readings of the second and third pressure gauges and the lockout pressure value.

10. The debugging and testing method according to claim 9, characterized in that, After testing the pressure characteristics of the pressure reducing valve, the following steps are also included: Stop the gas supply and close all shut-off valves, normally open solenoid valves, and normally closed solenoid valves. Open the first shut-off valve, the tenth shut-off valve, the second shut-off valve, the eleventh shut-off valve, the fourth shut-off valve, the eighth shut-off valve, the normally open solenoid valve, the normally closed solenoid valve, and the twelfth solenoid valve in sequence. Remove the test pressure reducing valve and put a clean protective cap on the test pressure reducing valve interface; Open the normally open solenoid valve and close all shut-off valves and normally closed solenoid valves. Wear a clean protective cap on the interface of the test gas platform.

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