Pressure maintaining valve test bed and pressure maintaining valve automatic detection method

Abstract

The invention provides a pressure maintaining valve test bench and a pressure maintaining valve automatic test method, and the pressure maintaining valve test bench comprises a main air source air control module, a product inlet air control module, a product control cavity air control module, a product outlet pressure detection module, a pressure difference detection module, and a main exhaust module. The air inlet end of the main air source air control module is connected with a main air source; an air inlet end of the product inlet air control module is connected with an air outlet end of the total air source air control module, and an air outlet end is connected with an inlet of a to-be-tested product; the air inlet end of the product control cavity air control module is connected with the air outlet end of the total air source air control module, and the air outlet end is connected with a control cavity of a to-be-tested product; the product outlet pressure detection module is connected between the outlet of the to-be-tested product and the main exhaust module; the pressure difference detection module is connected between the product control cavity pneumatic control module and the main exhaust module; the total exhaust module is connected to a common exhaust system. According to the pressure maintaining valve test bench, the detection efficiency and accuracy of the pressure maintaining valve can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of valve testing, and particularly to a pressure stabilizing valve test bench and an automatic testing method for a pressure stabilizing valve. Background Art

[0002] The valves of aerospace engines are key functional automatic control components of various types of engines, directly affecting the success or failure of rocket launches. During flight, the valve products accurately execute commands such as opening and closing according to pre-set programs to achieve actions such as engine startup, operation, and shutdown, so as to maintain the normal working state of the launch vehicle and are single-point failure products for various types of launch vehicles and weapons.

[0003] In order to ensure the effectiveness of the valves, it is necessary to conduct strict product performance tests before the valves leave the factory. The pressure stabilizing valve is the most complex in the valve testing process, requiring a forward inspection of sequential pressure reduction at 12 pressure points and a reverse inspection during pressure increase. This inspection test is carried out 5 times under different pressure states, and the number of pressure points to be tested is as many as 120. The accuracy requirement for recording at each point is 0.0001 (design requirement ±0.030). Currently, such high-precision and high-density detections are all completed by the operations and records of inspectors, with low detection efficiency and poor detection accuracy. Therefore, how to improve the detection efficiency and accuracy of the pressure stabilizing valve is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0004] In view of this, the present disclosure provides a pressure stabilizing valve test bench and an automatic testing method for a pressure stabilizing valve, which can automatically complete the testing of the pressure stabilizing valve, thereby improving the detection efficiency and accuracy of the pressure stabilizing valve.

[0005] According to the first aspect of the present disclosure, there is provided a pressure stabilizing valve test bench, including: a total air source pneumatic control module, a product inlet pneumatic control module, a product control chamber pneumatic control module, a product outlet pressure detection module, a differential pressure detection module, and a total exhaust module;

[0006] The intake end of the total air source pneumatic control module is connected to the total air source to control the access of the total air source;

[0007] The intake end of the product inlet pneumatic control module is connected to the outlet end of the total air source pneumatic control module, and the outlet end of the product inlet pneumatic control module is connected to the inlet of the product to be tested to achieve the intake control of the inlet of the product to be tested;

[0008] The intake end of the product control chamber pneumatic control module is connected to the outlet end of the total air source pneumatic control module, and the outlet end of the product control chamber pneumatic control module is connected to the control chamber of the product to be tested to achieve the intake control of the control chamber of the product to be tested;

[0009] The product outlet pressure detection module is connected between the outlet of the product to be tested and the total exhaust module to detect the outlet pressure of the product to be tested;

[0010] The differential pressure detection module is connected between the product control chamber pneumatic control module and the total exhaust module to detect the pressure difference between the outlet and the control chamber of the product to be tested;

[0011] The total exhaust module is connected to the common exhaust system to exhaust to the common exhaust system.

[0012] In a possible implementation, the total air source pneumatic control module includes: a first intake valve, a filter, a second intake valve, a throttle valve, a first total air source pressure gauge, and a second total air source pressure gauge;

[0013] The first intake valve, the filter, the second intake valve, and the throttle valve are sequentially connected by an air duct. The intake end of the first intake valve is connected to the total air source by an air duct. The throttle valve is connected to the intake ends of the product inlet pneumatic control module and the product control chamber pneumatic control module by air ducts respectively. Wherein, the air duct inlet connected to the total air source is the intake end of the total air source pneumatic control module, and the air duct outlet connected to the intake ends of the product inlet pneumatic control module and the product control chamber pneumatic control module is the outlet end of the total air source pneumatic control module;

[0014] The first total air source pressure gauge is arranged on the air duct connecting the filter and the second intake valve to detect the total air source pressure after passing through the filter;

[0015] The second total air source pressure gauge is arranged on the air duct at the outlet end of the total air source pneumatic control module to detect the total air source pressure output by the total air source pneumatic control module.

[0016] In a possible implementation, the product inlet pneumatic control module includes: a pressure controller, a pneumatic pressure reducing valve, an automatic buffer valve, and a second air source pressure gauge;

[0017] The intake end of the pneumatic pressure reducing valve is connected to the outlet end of the total air source pneumatic control module as the intake end of the product inlet pneumatic control module. The outlet end of the pneumatic pressure reducing valve is connected to the intake end of the automatic buffer valve by an air duct. The outlet end of the automatic buffer valve is connected to the inlet of the product to be tested by an air duct. The air duct outlet connected to the inlet of the product to be tested is the outlet end of the product inlet pneumatic control module;

[0018] The intake end of the pressure controller is communicated with the intake end of the pneumatic pressure reducing valve by an air duct, and the control end of the pressure controller is connected to the control end of the pneumatic pressure reducing valve by an air duct;

[0019] A second air source pressure gauge is provided on the air outlet duct of the product inlet pneumatic control module for detecting the air source pressure applied by the product inlet pneumatic control module to the product inlet to be tested.

[0020] In a possible implementation, the automatic buffer valve is composed of a first automatic pressure reducing valve and a ninth slow-opening solenoid valve connected in parallel.

[0021] In a possible implementation, the product control chamber pneumatic control module includes: a fourth automatic pressure reducing valve, a tenth automatic pressure reducing valve, a third automatic pressure reducing valve, and a third air source pressure gauge;

[0022] The fourth automatic pressure reducing valve, the tenth automatic pressure reducing valve, and the third automatic pressure reducing valve are sequentially connected by an air duct. The fourth automatic pressure reducing valve is connected to the air outlet end of the main air source pneumatic control module through an air duct, and the third automatic pressure reducing valve is connected to the control chamber of the product to be tested through an air duct. Wherein, the inlet of the air duct connecting the fourth automatic pressure reducing valve to the air outlet end of the main air source pneumatic control module is the air inlet end of the product control chamber pneumatic control module, and the outlet of the air duct connecting the third automatic pressure reducing valve to the control chamber of the product to be tested is the air outlet end of the product control chamber pneumatic control module;

[0023] A third air source pressure gauge is provided on the air outlet duct of the product control chamber pneumatic control module for detecting the air source pressure applied by the product control chamber pneumatic control module to the product control chamber to be tested.

[0024] In a possible implementation, the product outlet pressure detection module includes: a fourth air source pressure gauge and a fifth air source pressure gauge;

[0025] The fourth air source pressure gauge and the fifth air source pressure gauge are used to test the air source pressure at the outlet of the product to be tested.

[0026] In a possible implementation, the differential pressure detection module includes: a differential pressure gauge, and the differential pressure gauge is used to test the differential pressure between the outlet of the product to be tested and the control chamber.

[0027] According to a second aspect of the present disclosure, a method for automatically testing a pressure stabilizing valve is provided, including:

[0028] Controlling the main air source pneumatic control module to access the main air source;

[0029] Judging whether the accessed main air source is stable. When the main air source is stable, accessing an air source to the control chamber of the product to be tested through the product control chamber pneumatic control module;

[0030] Determine whether the air source connected to the control chamber is stable. When it is determined that the air source in the control chamber is stable, connect an air source to the inlet of the product to be tested through the product inlet pneumatic control module;

[0031] Determine whether the air source connected to the inlet is stable. When it is determined that the air source at the inlet is stable, turn on the total exhaust module for exhaust, change the air source pressure at the inlet of the product to be tested through the product inlet pneumatic control module, and detect the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber through the product outlet pressure detection module and the differential pressure detection module;

[0032] Judge whether the product to be tested is qualified according to the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber.

[0033] According to the third aspect of the present disclosure, a pressure stabilizing valve test device is provided, including: a total air source pneumatic control module for controlling the connection of the total air source pneumatic control module to the total air source;

[0034] A control chamber pneumatic control module for determining whether the connected total air source is stable. When the total air source is stable, connect an air source to the control chamber of the product to be tested through the product control chamber pneumatic control module;

[0035] A product inlet pneumatic control module for determining whether the air source connected to the control chamber is stable. When it is determined that the air source in the control chamber is stable, connect an air source to the inlet of the product to be tested through the product inlet pneumatic control module;

[0036] A test module for determining whether the air source connected to the inlet is stable. When it is determined that the air source at the inlet is stable, turn on the total exhaust module for exhaust, change the air source pressure at the inlet and outlet of the product to be tested through the product inlet pneumatic control module, and detect the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber through the product outlet pressure detection module and the differential pressure detection module;

[0037] A result output module for determining whether the product to be tested is qualified according to the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber.

[0038] According to the fourth aspect of the present disclosure, a non-volatile computer-readable storage medium is provided, on which computer program instructions are stored, wherein when the computer program instructions are executed by a processor, the method described in the first aspect of the present disclosure is implemented.

[0039] The present disclosure provides a pressure stabilizing valve test bench and an automatic testing method for a pressure stabilizing valve. The pressure stabilizing valve test bench includes: a main air source pneumatic control module, a product inlet pneumatic control module, a product control chamber pneumatic control module, a product outlet pressure detection module, a pressure difference detection module, and a main exhaust module; the inlet end of the main air source pneumatic control module is connected to the main air source to control the access of the main air source; the inlet end of the product inlet pneumatic control module is connected to the outlet end of the main air source pneumatic control module, and the outlet end of the product inlet pneumatic control module is connected to the inlet of the product to be tested to achieve the intake control of the inlet of the product to be tested; the inlet end of the product control chamber pneumatic control module is connected to the outlet end of the main air source pneumatic control module, and the outlet end of the product control chamber pneumatic control module is connected to the control chamber of the product to be tested to achieve the intake control of the control chamber of the product to be tested; the product outlet pressure detection module is connected between the outlet of the product to be tested and the main exhaust module to detect the outlet pressure of the product to be tested; the pressure difference detection module is connected between the product control chamber pneumatic control module and the main exhaust module to detect the pressure difference between the outlet and the control chamber of the product to be tested; the main exhaust module is connected to the common exhaust system to exhaust to the common exhaust system. Through the pressure stabilizing valve test bench provided by the present disclosure, the test of the pressure stabilizing valve can be automatically completed, thereby improving the detection efficiency and accuracy of the pressure stabilizing valve.

[0040] Other features and aspects of the present disclosure will become apparent from the following detailed description of the exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings included in and constituting a part of the specification illustrate exemplary embodiments, features, and aspects of the present disclosure and are used to explain the principles of the present disclosure together with the specification.

[0042] Figure 1 The structural diagram of the pressure stabilizing valve test bench according to an embodiment of the present disclosure is shown;

[0043] Figure 2 The structural diagram of the main air source pneumatic control module according to an embodiment of the present disclosure is shown;

[0044] Figure 3 The structural diagram of the product inlet pneumatic control module according to an embodiment of the present disclosure is shown;

[0045] Figure 4 The structural diagram of the product control chamber pneumatic control module according to an embodiment of the present disclosure is shown;

[0046] Figure 5 The structural diagram of the pressure difference detection module according to an embodiment of the present disclosure is shown;

[0047] Figure 6 The structural diagram of the product outlet pressure detection module according to an embodiment of the present disclosure is shown;

[0048] Figure 7 The flowchart showing the automatic testing method of a pressure stabilizing valve according to an embodiment of the present disclosure;

[0049] Figure 8 The schematic block diagram showing the test device of a pressure stabilizing valve according to an embodiment of the present disclosure. Detailed implementation manners

[0050] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0051] The special term "exemplary" herein means "serving as an example, embodiment or illustration". Any embodiment described as "exemplary" herein is not necessarily to be construed as superior or better than other embodiments.

[0052] In addition, for better illustration of the present disclosure, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present disclosure can also be implemented without some specific details. In some instances, methods, means, elements and circuits well known to those skilled in the art are not described in detail so as to highlight the gist of the present disclosure.

[0053] <Embodiment of the pressure stabilizing valve test bench>

[0054] Figure 1 The structural diagram showing the pressure stabilizing valve test bench according to an embodiment of the present disclosure. As Figure 1 shown, the pressure stabilizing valve test bench 100 includes: a main air source pneumatic control module 110, a product inlet pneumatic control module 120, a product control chamber pneumatic control module 130, a product outlet pressure detection module 140, a differential pressure detection module 150, and a main exhaust module 160.

[0055] The air inlet end of the main air source pneumatic control module 110 is connected to the main air source to control the access of the main air source.

[0056] The air inlet end of the product inlet pneumatic control module 120 is connected to the air outlet end of the main air source pneumatic control module 110, and the air outlet end of the product inlet pneumatic control module 120 is connected to the inlet C of the product to be tested to achieve the air inlet control of the inlet C of the product to be tested.

[0057] The air inlet end of the product control chamber pneumatic control module 130 is connected to the air outlet end of the main air source pneumatic control module 110, and the air outlet end of the product control chamber pneumatic control module 130 is connected to the control chamber B of the product to be tested to achieve the air inlet control of the control chamber B of the product to be tested.

[0058] The product export pressure detection module 140 is connected between the export A of the product to be tested and the total exhaust module 160 to detect the pressure at the export A of the product to be tested.

[0059] The differential pressure detection module 150 is connected between the pneumatic control module 130 of the product control chamber and the total exhaust module 160 to detect the pressure difference between the export A of the product to be tested and the control chamber B.

[0060] The total exhaust module 160 is connected to the common exhaust system to exhaust to the common exhaust system.

[0061] In a possible implementation, the total air source pneumatic control module 110 is as Figure 2 shown, including: the first intake valve MKV00, the filter GL00, the second intake valve SV00, the throttle valve MKV02, the first total air source pressure gauge PI00, and the second total air source pressure gauge PT00. Among them, the first intake valve MKV00, the filter GL00, the second intake valve SV00, and the throttle valve MKV02 are sequentially connected through air ducts. The intake end of the first intake valve MKV00 is connected to the total air source through an air duct. The throttle valve MKV02 is connected to the intake ends of the product inlet pneumatic control module 120 and the product control chamber pneumatic control module 130 through air ducts respectively. Among them, the air duct inlet connected to the total air source is the intake end of the total air source pneumatic control module, and the air duct outlets connected to the intake ends of the product inlet pneumatic control module 120 and the product control chamber pneumatic control module 130 are the outlet ends of the total air source pneumatic control module. In a specific embodiment, the first intake valve is set as a manual intake valve, and the second intake valve is set as an automatic intake valve.

[0062] A first total air source pressure gauge PI00 is provided on the air duct connecting the filter GL00 and the second intake valve SV00 for detecting the total air source pressure after passing through the filter GL00. A second total air source pressure gauge PT00 is provided on the air duct at the outlet end of the total air source pneumatic control module 110 for detecting the total air source pressure output by the total air source pneumatic control module 110.

[0063] Before starting the test, all valves in the pressure stabilizing valve test bench are in the closed state. When starting the test, first open the first intake valve MKV00 and observe the first total air source pressure gauge PI00. When the pressure value shown on the first total air source pressure gauge PI00 meets the test start condition, open the second intake valve SV00 and the throttle valve MKV02 to connect the total air source to the total air source pneumatic control module 110. After connecting the total air source, the total air source pressure output by the total air source pneumatic control module 110 is monitored in real time through the second total air source pressure gauge PT00. When this total air source pressure reaches the preset first stable value, the air source can be continued to be connected to the control chamber of the product to be tested through the product control chamber pneumatic control module.

[0064] Further, the air duct connecting the connection filter GL00 and the second intake valve SV00 is also connected to the common exhaust system through the air source exhaust valve MKV1, and the air duct connecting the throttle valve MKV02 and the second main air source pressure gauge PT00 is also connected to the common exhaust system through the air source exhaust valve MKV2. In this way, after each test, all the air sources in the main air source pneumatic control module 110 can be emptied by opening the air source exhaust valve MKV1 and the air source exhaust valve MKV2. When the pressure value displayed by the first main air source pressure gauge PI00 is 0, it indicates that the gas in the system has been emptied. At this time, the experimental system can be closed to ensure that the system is not under pressure and does not become a dangerous point during the test.

[0065] Further, a standard pressure measurement port BP00 is preset on the air duct connecting the throttle valve MKV02 and the second main air source pressure gauge PT00. Through the standard pressure measurement port BP00, the accuracy verification of the second main air source pressure gauge PT00 can be realized online, and it is no longer necessary to disassemble and verify it.

[0066] In a possible implementation manner, the product inlet pneumatic control module 120 can be as Figure 3 shown, including: a pressure controller (composed of SVA and SVB), a pneumatic control pressure reducing valve QKV01, an automatic buffer valve, and a second air source pressure gauge PT02.

[0067] The intake end of the pneumatic control pressure reducing valve QKV01 serves as the intake end of the product inlet pneumatic control module 120 and is connected to the outlet end of the main air source pneumatic control module 110. The outlet end of the pneumatic control pressure reducing valve QKV01 is connected to the intake end of the automatic buffer valve through an air duct. The outlet end of the automatic buffer valve is connected to the inlet C of the product to be tested through an air duct. The outlet of the air duct connected to the inlet C of the product to be tested is the outlet end of the product inlet pneumatic control module 120.

[0068] The intake end of the pressure controller is communicated with the intake end of the pneumatic control pressure reducing valve QKV01 through an air duct, and the control end of the pressure controller is connected to the control end of the pneumatic control pressure reducing valve QKV01 through an air duct.

[0069] A second air source pressure gauge PT02 is provided on the air duct at the outlet end of the product inlet pneumatic control module 120 for detecting the air source pressure applied by the product inlet pneumatic control module 120 to the inlet C of the product to be tested.

[0070] During the experiment, when it is detected that the pressure in the control chamber of the product to be tested reaches the preset second stable value, the product inlet pneumatic control module 120 can supply air to the product inlet C of the product to be tested. Specifically, first, the pressure controller is automatically turned on, and the pneumatic control pressure reducing valve QKV01 is turned on through the pressure controller. After the pneumatic control pressure reducing valve QKV01 is turned on, the automatic buffer valve is started to supply air to the product inlet C of the product to be tested. During the air supply process, the air source pressure at the product inlet C of the product to be tested is detected in real time through the second air source pressure gauge PT02. When the air source pressure at the product inlet C of the product to be tested reaches the preset third stable value, the pressure stabilization test of the pressure stabilizing valve can be continued.

[0071] It should be noted here that a seventh air source pressure gauge PT07 is also provided on the air duct connecting the control end of the pressure controller and the control end of the pneumatic control pressure reducing valve QKV01. During the process of turning on the pneumatic control pressure reducing valve QKV01 through the pressure controller, the air source pressure applied to the pneumatic control pressure reducing valve QKV01 is detected through the seventh air source pressure gauge PT07. When the air source pressure applied to the pneumatic control pressure reducing valve QKV01 meets the opening condition of the pneumatic control pressure reducing valve, the pneumatic control pressure reducing valve QKV01 can be automatically turned on to supply air to the product inlet.

[0072] In a possible implementation manner, in order to avoid the impact of rapid air supply on the product inlet C of the product to be tested, the automatic buffer valve can be composed of a first automatic pressure reducing valve SV01 and a ninth slow-opening solenoid valve SV09 connected in parallel. Among them, the diameter of the ninth slow-opening solenoid valve SV09 is smaller than that of the first automatic pressure reducing valve SV01. In this way, after the pneumatic control pressure reducing valve QKV01 is turned on, the ninth slow-opening solenoid valve SV09 with a small diameter is first started to supply air to the product inlet C of the product to be tested. After the air source pressure at the product inlet C of the product to be tested reaches the preset fourth stable value, the first automatic pressure reducing valve SV01 with a large diameter is then turned on, and air is supplied to the product inlet C of the product to be tested through the first automatic pressure reducing valve SV01 and the ninth slow-opening solenoid valve SV09 at the same time until the air source pressure at the product inlet C of the product to be tested reaches the preset third stable value.

[0073] In a preferred embodiment, the diameter of the ninth slow-opening solenoid valve SV09 can be 1 mm, and the diameter of the first automatic pressure reducing valve SV01 can be 10 mm.

[0074] Furthermore, the air outlet end of the pressure controller is also connected with a first muffling exhaust valve XSQ-01 to adjust the pressure inside the pressure controller through the first muffling exhaust valve XSQ-01.

[0075] Further, the air outlet of the product inlet pneumatic control module 120 is also connected to the common exhaust system through the sixth automatic pressure reducing valve SV06. In this way, when the air source pressure at the air outlet of the product inlet pneumatic control module 120 is greater than the preset third stable value, the sixth automatic pressure reducing valve SV06 can be automatically opened to exhaust to the common exhaust system until the air source pressure at the air outlet of the product inlet pneumatic control module 120 is stabilized at the third stable value, and then the sixth automatic pressure reducing valve SV06 is automatically closed.

[0076] In a possible implementation, the product control chamber pneumatic control module 130 can be as Figure 4 shown, including: the fourth automatic pressure reducing valve SV4, the tenth automatic pressure reducing valve SV10, the third automatic pressure reducing valve SV3, and the third air source pressure gauge PT03.

[0077] The fourth automatic pressure reducing valve SV4, the tenth automatic pressure reducing valve SV10, and the third automatic pressure reducing valve SV3 are sequentially connected through an air duct. The fourth automatic pressure reducing valve SV4 is connected to the air outlet of the total air source pneumatic control module 110 through an air duct. The third automatic pressure reducing valve SV3 is connected to the control chamber B of the product to be tested through an air duct. Among them, the inlet of the air duct connecting the fourth automatic pressure reducing valve SV4 to the air outlet of the total air source pneumatic control module 110 is the air inlet of the product control chamber pneumatic control module 130, and the outlet of the air duct connecting the third automatic pressure reducing valve SV3 to the control chamber B of the product to be tested is the air outlet of the product control chamber pneumatic control module 130.

[0078] A third air source pressure gauge PT3 is provided on the air duct at the air outlet of the product control chamber pneumatic control module 130, which is used to detect the air source pressure applied by the product control chamber pneumatic control module 130 to the control chamber B of the product to be tested.

[0079] During the experiment, when the total air source pressure output by the total air source pneumatic control module 110 reaches the preset first stable value, the air source can be connected to the control chamber B of the product to be tested through the product control chamber pneumatic control module 130. Specifically, when the total air source pressure output by the total air source pneumatic control module 110 reaches the preset first stable value, the fourth automatic pressure reducing valve SV4, the tenth automatic pressure reducing valve SV10, and the third automatic pressure reducing valve SV3 are automatically controlled to open, and at this time, the air source can be connected to the control chamber B of the product to be tested. When connecting the air source to the control chamber B of the product to be tested, the air source pressure of the control chamber B of the product to be tested will be detected in real time through the third air source pressure gauge PT3. When it is detected that the pressure of the control chamber B of the product to be detected reaches the preset second stable value, the product inlet pneumatic control module 120 can be enabled to supply air to the product inlet C of the product to be tested.

[0080] Further, the air duct connecting the third automatic pressure reducing valve SV3 and the control chamber B of the product to be tested is also connected to the common exhaust system through the eighth automatic pressure reducing valve SV8. The air duct connecting the fourth automatic pressure reducing valve SV4 and the tenth automatic pressure reducing valve SV10 is also connected to the second exhaust silencer XSQ-02 through the fifth automatic pressure reducing valve S5. In this way, when the air source pressure at the air outlet end of the air control module 130 of the product control chamber is greater than the preset first voltage stabilization range, the fifth automatic pressure reducing valve SV5 can be started, and slow exhaust can be carried out through the second exhaust silencer XSQ-02 connected thereto until the air source pressure at the air outlet end of the air control module 130 of the product control chamber is stabilized at the preset second stable value, and then the fifth automatic pressure reducing valve SV5 is closed. When the air source pressure at the air outlet end of the air control module 130 of the product control chamber is greater than the preset second voltage stabilization range, the eighth automatic pressure reducing valve SV8 can be started to quickly exhaust to the common system until the air source pressure at the air outlet end of the air control module 130 of the product control chamber is stabilized at the preset second stable value, and then the eighth automatic pressure reducing valve SV8 is closed. Among them, the first voltage stabilization range is less than the second voltage stabilization range.

[0081] In a possible implementation manner, the differential pressure detection module 150 includes: a differential pressure gauge for testing the differential pressure between the outlet A of the product to be tested and the control chamber C.

[0082] During the experiment, in order to prevent the air source at the outlet A of the product to be tested from impacting the control chamber B thereof and to stabilize the air source pressure at the outlet B of the product to be tested, an air cylinder is also provided in the differential pressure detection module. In this embodiment, the differential pressure detection module 150 can be as Figure 5 shown, including: a first air cylinder Q1, a seventh automatic pressure reducing valve SV07, a second air cylinder Q2, a second automatic pressure reducing valve SV02, and a differential pressure gauge PTI06.

[0083] The first air cylinder Q1, the seventh automatic pressure reducing valve SV07, the second air cylinder Q2, and the second automatic pressure reducing valve SV02 are sequentially connected through an air duct; the inlet end of the first air cylinder Q1 is connected to the air duct connecting the tenth automatic pressure reducing valve SV10 and the third automatic pressure reducing valve SV3 in the air control module 130 of the product control chamber through an air duct, and the outlet end of the second automatic pressure reducing valve SV2 is connected to the air duct connecting the product outlet pressure detection module 140 and the exhaust module 160 through an air duct. Among them, the air duct inlet connected to the air duct connecting the tenth automatic pressure reducing valve SV10 and the third automatic pressure reducing valve SV3 in the air control module 130 of the product control chamber is the inlet end of the differential pressure detection module 150, and the air duct outlet connected to the air duct connecting the product outlet pressure detection module 140 and the total exhaust module 160 is the outlet end of the differential pressure detection module 150.

[0084] The first measurement port of the differential pressure gauge PTI06 is connected through an air duct to the air duct that connects the first gas cylinder Q1 and the seventh automatic pressure reducing valve SV07, and the second measurement port of the differential pressure gauge PTI06 is connected through an air duct to the air duct that connects the second gas cylinder Q2 and the second automatic pressure reducing valve SV02.

[0085] In this embodiment, in order to enable the gas cylinder to play a buffering role, when connecting a gas source to the control chamber B of the product to be tested through the pneumatic control module 130 of the product control chamber, the seventh automatic pressure reducing valve SV07 in the differential pressure detection module 150 will be opened simultaneously. In this way, while connecting the gas source to the control chamber B of the product to be tested, a buffer gas source can be filled into the first gas cylinder Q1 and the second gas cylinder Q2. When the gas source pressure in the control chamber B of the product to be tested stabilizes at a preset second stable value, the seventh automatic pressure reducing valve SV07 is closed. After the seventh automatic pressure reducing valve SV07 is closed, the gas supply can be carried out to the inlet C of the product to be tested through the product inlet pneumatic control module 120. Further, after the gas source pressure at the inlet C of the product to be tested stabilizes at a third stable value, the total exhaust module is opened, and the second automatic pressure reducing valve SV02 in the differential pressure detection module 150 is opened simultaneously. At this time, the differential pressure gauge can measure the differential pressure between the outlet A and the control chamber B of the product to be tested.

[0086] In a possible implementation manner, the product outlet pressure detection module 140 can be as Figure 6 shown, including: a fourth gas source pressure gauge PT04 and a fifth gas source pressure gauge PT05; the fourth gas source pressure gauge PT04 and the fifth gas source pressure gauge PT05 are used to measure the gas source pressure at the outlet A of the product to be tested. After the total exhaust module is opened, the product outlet pressure detection module 140 can perform the pressure test at the outlet A of the product to be tested.

[0087] After the total exhaust module is opened, the test bench will control the opening degree of the pneumatic control pressure reducing valve in the product inlet pneumatic control module 120 according to a pre-set program, adjust the gas source pressure at the inlet C of the product to be tested through the opening degree of the pneumatic control pressure reducing valve, so that the gas source pressure at the inlet C completes the process of sequentially reducing and increasing pressure at 12 preset pressure points, and calculates the corresponding outlet pressure and differential pressure at each pressure point through the product outlet pressure detection module 140 and the differential pressure detection module 150. Repeat the above process for a set number of times, output the corresponding outlet pressure and differential pressure at each pressure point statistically during each experiment process, and determine whether the product to be tested is qualified through these output statistical values. It should be noted here that the product to be tested in this disclosure is a pressure stabilizing valve. The various stable values and the pressure stabilizing range involved in the test process can be adjusted according to the product of the pressure stabilizing valve, and no specific limitation is made here.

[0088] The present disclosure provides a pressure stabilizing valve test bench, including: a main air source pneumatic control module, a product inlet pneumatic control module, a product control chamber pneumatic control module, a product outlet pressure detection module, a differential pressure detection module, and a main exhaust module; the inlet end of the main air source pneumatic control module is connected to the main air source to control the access of the main air source; the inlet end of the product inlet pneumatic control module is connected to the outlet end of the main air source pneumatic control module, and the outlet end of the product inlet pneumatic control module is connected to the inlet of the product to be tested to achieve the air intake control of the inlet of the product to be tested; the inlet end of the product control chamber pneumatic control module is connected to the outlet end of the main air source pneumatic control module, and the outlet end of the product control chamber pneumatic control module is connected to the control chamber of the product to be tested to achieve the air intake control of the control chamber of the product to be tested; the product outlet pressure detection module is connected between the outlet of the product to be tested and the main exhaust module to detect the outlet pressure of the product to be tested; the differential pressure detection module is connected between the product control chamber pneumatic control module and the main exhaust module to detect the pressure difference between the outlet and the control chamber of the product to be tested; the main exhaust module is connected to the common exhaust system to exhaust to the common exhaust system. Through the pressure stabilizing valve test bench provided by the present disclosure, the test of the pressure stabilizing valve can be automatically completed, thereby improving the detection efficiency and accuracy of the pressure stabilizing valve.

[0089] <Method Embodiment>

[0090] Figure 7 The flowchart showing the automatic test method of the pressure stabilizing valve according to an embodiment of the present disclosure is as follows. As Figure 7 shown, the method includes steps S1100 - S1500.

[0091] S1100, control the main air source pneumatic control module to access the main air source. For the specific process, refer to the pneumatic control process of the main air source pneumatic control module 110, which will not be elaborated here.

[0092] S1200, determine whether the accessed main air source is stable. If the main air source is stable, access the air source to the control chamber of the product to be tested through the product control chamber pneumatic control module. For the specific process, refer to the pneumatic control process of the product control chamber pneumatic control module 130, which will not be elaborated here.

[0093] S1300, determine whether the air source accessed to the control chamber is stable. If it is determined that the air source in the control chamber is stable, access the air source to the inlet of the product to be tested through the product inlet pneumatic control module. For the specific process, refer to the pneumatic control process of the product inlet pneumatic control module 120, which will not be elaborated here.

[0094] S1400, determine whether the gas source at the access inlet is stable. If it is determined that the gas source at the inlet is stable, turn on the main exhaust module for exhaust. Change the gas source pressure at the inlet of the product to be tested through the product inlet pneumatic control module, and detect the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber through the product outlet pressure detection module and the differential pressure detection module. For the specific process, refer to the detection processes of the product outlet pressure detection module 140 and the differential pressure detection module 150, which will not be elaborated here.

[0095] S1500, determine whether the product to be tested is qualified according to the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber. Specifically, when the pressure at the outlet of the product to be tested is stable within a preset first range and the pressure difference between the outlet and the control chamber is less than or equal to a preset differential pressure threshold, determine that the product to be tested is a qualified product. Among them, the first range and the differential pressure threshold can be set according to specific products, which will not be elaborated here.

[0096] To clearly illustrate the automatic testing method of the pressure stabilizing valve, the testing process will be described again in combination with Figures 1-6 Before starting the test, all valves in the pressure stabilizing valve test bench are in the closed state. The specific steps are as follows:

[0097] First, connect the gas source through the main gas source pneumatic control module 110. Specifically, first turn on the first intake valve MKV00, the second intake valve SV00, and the throttle valve MKV02 to connect the main gas source to the main gas source pneumatic control module 110. After connecting the main gas source, monitor the main gas source pressure output by the main gas source pneumatic control module 110 in real time through the second main gas source pressure gauge PT00. When the main gas source pressure reaches a preset first stable value, execute the second step.

[0098] Second, connect the gas source to the control chamber B of the product to be tested through the product control chamber pneumatic control module 130. Specifically, automatically control the fourth automatic pressure reducing valve SV4, the tenth automatic pressure reducing valve SV10, and the third automatic pressure reducing valve SV3 to open to connect the gas source to the control chamber B of the product to be tested. At the same time, the seventh automatic pressure reducing valve SV07 in the differential pressure detection module 150 fills the first gas cylinder Q1 and the second gas cylinder Q2 with gas until it is detected that the pressure in the control chamber B of the product to be detected reaches a preset second stable value, then close the seventh automatic pressure reducing valve SV07 and execute the third step.

[0099] Third, supply gas to the inlet C of the product to be tested through the product inlet pneumatic control module 120. Specifically, first automatically turn on the pressure controller, and turn on the pneumatic control pressure reducing valve QKV01 through the pressure controller. After the pneumatic control pressure reducing valve QKV01 is turned on, first start the ninth slow-opening solenoid valve SV09 with a small diameter to supply gas to the inlet C of the product to be tested. After the gas source pressure at the inlet C of the product to be tested reaches the preset fourth stable value, then turn on the first automatic pressure reducing valve SV01 with a large diameter, and supply gas to the inlet C of the product to be tested through the first automatic pressure reducing valve SV01 and the ninth slow-opening solenoid valve SV09 at the same time until the gas source pressure at the inlet C of the product to be tested reaches the preset third stable value, and then execute the fourth step.

[0100] Fourth, turn on the total exhaust module 160, and at the same time turn on the second automatic pressure reducing valve SV02 in the differential pressure detection module 150. At this time, the differential pressure gauge starts to measure the differential pressure between the outlet A of the product to be tested and the control chamber B. At the same time, the fourth gas source pressure gauge PT04 and the fifth gas source pressure gauge PT05 start to measure the gas source pressure at the outlet A of the product to be tested.

[0101] Fifth, control the opening degree of the pneumatic control pressure reducing valve in the product inlet pneumatic control module 120 according to the pre-set program, adjust the gas source pressure at the inlet C of the product to be tested through the opening degree of the pneumatic control pressure reducing valve, so that the gas source pressure at the inlet C completes the process of sequentially reducing and increasing pressure at 12 preset pressure points, and calculate the outlet pressure and differential pressure corresponding to each pressure point through the product outlet pressure detection module 140 and the differential pressure detection module 150 at each pressure point. Repeat the above process for the set number of times, output the outlet pressure and differential pressure corresponding to each pressure point statistically in each experimental process, and determine whether the product to be tested is qualified through these output statistical values.

[0102] <Device Embodiment>

[0103] Figure 8 FIG. shows a schematic block diagram of a pressure stabilizing valve test device according to an embodiment of the present disclosure.

[0104] As Figure 8 shown, the device 100 includes:

[0105] A total gas source pneumatic control module 110 for controlling the total gas source pneumatic control module to access the total gas source;

[0106] A control chamber pneumatic control module 120 for judging whether the accessed total gas source is stable, and accessing the gas source to the control chamber of the product to be tested through the product control chamber pneumatic control module when the total gas source is stable;

[0107] A product inlet pneumatic control module 130 for judging whether the gas source accessed to the control chamber is stable, and accessing the gas source to the inlet of the product to be tested through the product inlet pneumatic control module when the gas source in the control chamber is judged to be stable;

[0108] A test module 140 is configured to determine whether the gas source at the access inlet is stable. When it is determined that the gas source at the inlet is stable, the total exhaust module is activated for exhaust. The gas source pressure at the inlet and outlet of the product to be tested is changed through the product inlet pneumatic control module, and the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber are detected through the product outlet pressure detection module and the pressure difference detection module.

[0109] A result output module 150 is configured to determine whether the product to be tested is qualified based on the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber.

[0110] <Embodiment of the storage medium>

[0111] According to the fourth aspect of the present disclosure, a non - volatile computer - readable storage medium is further provided, on which computer program instructions are stored. When the computer program instructions are executed by a processor 210, the automatic testing method of the pressure - stabilizing valve described in any one of the foregoing is implemented.

[0112] The embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical application, or the technical improvement of the technology in the market, or to enable other ordinary technical personnel in the technical field to understand the embodiments disclosed herein.

Claims

1. A pressure stabilizing valve test bench, characterized in that: include: Total air source air control module, product inlet air control module, product control cavity air control module, product outlet pressure detection module, pressure difference detection module and total exhaust module; The air inlet end of the main air source air control module is connected to the main air source to control the access to the main air source; The air inlet end of the product inlet air control module is connected to the air outlet end of the total air source air control module, and the air outlet end of the product inlet air control module is connected to the inlet of the product to be tested, so as to realize the air inlet control of the inlet of the product to be tested; The air inlet end of the product control cavity air control module is connected to the air outlet end of the total air source air control module, and the air outlet end of the product control cavity air control module is connected to the control cavity of the product to be tested, so as to realize the air inlet control of the control cavity of the product to be tested; The product outlet pressure detection module is connected between the outlet of the product to be tested and the total exhaust module to detect the outlet pressure of the product to be tested; The pressure difference detection module is connected between the product control cavity air control module and the total exhaust module to detect the pressure difference between the outlet of the product to be tested and the control cavity; The main exhaust module is connected to a common exhaust system to exhaust gas to the common exhaust system.

2. The pressure-stabilizing valve test bench according to claim 1, characterized in that: The total air source air control module includes: a first air intake valve, a filter, a second air intake valve, a throttle valve, a first total air source pressure gauge and a second total air source pressure gauge; The first air inlet valve, the filter, the second air inlet valve and the throttle valve are connected in sequence through an air duct, the air inlet end of the first air inlet valve is connected to the main air source through the air duct, and the throttle valve is respectively connected to the air inlet end of the product inlet air control module and the air inlet end of the product control cavity air control module through the air duct, wherein the air duct inlet connected to the main air source is the air inlet end of the main air source air control module, and the air duct outlet connected to the air inlet end of the product inlet air control module and the air inlet end of the product control cavity air control module is the air outlet end of the main air source air control module; The first total air source pressure gauge is provided on the air duct connecting the filter and the second air inlet valve, and is used to detect the total air source pressure after passing through the filter; The second total air source pressure gauge is provided on the air duct at the air outlet end of the total air source air control module, which is used to detect the total air source pressure output by the total air source air control module.

3. The pressure-stabilizing valve test bench according to claim 1, characterized in that: The product inlet gas control module includes: a pressure controller, a gas-controlled pressure reducing valve, an automatic buffer valve and a second gas source pressure gauge; The air inlet end of the air-controlled pressure reducing valve is connected to the air outlet end of the total air source air control module as the air inlet end of the product inlet air control module, the air outlet end of the air-controlled pressure reducing valve is connected to the air inlet end of the automatic buffer valve through an air duct, the air outlet end of the automatic buffer valve is connected to the inlet of the product to be tested through an air duct, and the air duct outlet connected to the inlet of the product to be tested is the air outlet end of the product inlet air control module; The air inlet end of the pressure controller is connected to the air inlet end of the air-controlled pressure reducing valve through an air duct, and the control end of the pressure controller is connected to the control end of the air-controlled pressure reducing valve through an air duct; The second air source pressure gauge is provided on the air outlet end air duct of the product inlet air control module, which is used to detect the air source pressure applied by the product inlet air control module to the inlet of the product to be tested.

4. The pressure-stabilizing valve test bench according to claim 3, characterized in that: The automatic buffer valve is composed of a first automatic pressure reducing valve and a ninth slow-opening electromagnetic valve connected in parallel.

5. The pressure-stabilizing valve test bench according to claim 1, characterized in that: The product control cavity air control module includes: a fourth automatic pressure reducing valve, a tenth automatic pressure reducing valve, a third automatic pressure reducing valve and a third air source pressure gauge; The fourth automatic pressure reducing valve, the tenth automatic pressure reducing valve and the third automatic pressure reducing valve are connected in sequence through an air duct, the fourth automatic pressure reducing valve is connected to the air outlet end of the total air source air control module through the air duct, and the third automatic pressure reducing valve is connected to the control cavity of the product to be tested through the air duct, wherein the inlet of the air duct connected to the air outlet end of the total air source air control module of the fourth automatic pressure reducing valve is the air inlet end of the product control cavity air control module, and the outlet of the air duct connected to the control cavity of the product to be tested is the air outlet end of the product control cavity air control module; A third air source pressure gauge is provided on the air outlet end air duct of the product control cavity air control module, which is used to detect the air source pressure applied by the product control cavity air control module to the control cavity of the product to be tested.

6. The pressure-stabilizing valve test bench according to claim 1, characterized in that: The product outlet pressure detection module includes: a fourth gas source pressure gauge and a fifth gas source pressure gauge; The fourth gas source pressure gauge and the fifth gas source pressure gauge are used to test the gas source pressure at the outlet of the product to be tested.

7. The pressure-stabilizing valve test bench according to claim 5, characterized in that: The differential pressure detection module comprises: a differential pressure gauge, which is used to test the differential pressure between the outlet of the product to be tested and the control chamber.

8. A method for automatically testing a pressure regulating valve, characterized in that: include: Control the total gas source and connect the gas control module to the total gas source; Determine whether the connected total gas source is stable. If the total gas source is stable, connect the gas source to the control cavity of the product to be tested through the product control cavity gas control module; Determine whether the gas source connected to the control chamber is stable, and if it is determined that the gas source of the control chamber is stable, connect the gas source to the inlet of the product to be tested through the product inlet gas control module; Determine whether the gas source connected to the inlet is stable. If the gas source at the inlet is stable, open the main exhaust module to exhaust gas, change the gas source pressure at the inlet of the product to be tested through the product inlet gas control module, and detect the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber through the product outlet pressure detection module and the pressure difference detection module; Whether the product to be tested is qualified is judged according to the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber.

9. A pressure regulating valve test device, characterized in that: include: The main gas source air control module is used to control the main gas source air control module to access the main gas source; The control cavity air control module is used to determine whether the connected total air source is stable. When the total air source is stable, the air source is connected to the control cavity of the product to be tested through the product control cavity air control module; A product inlet gas control module, used to determine whether the gas source connected to the control chamber is stable. If the gas source of the control chamber is stable, the gas source is connected to the inlet of the product to be tested through the product inlet gas control module; A test module, used to determine whether the gas source connected to the inlet is stable, and when it is determined that the gas source at the inlet is stable, the main exhaust module is turned on to exhaust gas, the gas source pressure at the inlet and outlet of the product to be tested is changed through the product inlet gas control module, and the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber are detected through the product outlet pressure detection module and the pressure difference detection module; The result output module is used to determine whether the product to be tested is qualified according to the pressure at the outlet of the product to be tested and the pressure difference between the outlet and the control chamber.

10. A non-volatile computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the method of claim 8 is implemented.

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