Differential pressure valve performance test system

Abstract

The utility model provides a kind of differential pressure valve performance test system, including gas supply unit, gas path execution unit, fast plug sealing unit and pressure monitoring unit, fast plug sealing unit is used to seal and insert in the first end and second end of the differential pressure valve to be measured;Gas supply unit is configured to deliver gas to gas path execution unit;Gas path execution unit is configured to: adjust the pressure of first end and control the gas path on-off state of first end and gas supply unit, and control the gas path on-off state of second end and external atmosphere;Or, adjust the pressure of second end and control the gas path on-off state of second end and gas supply unit, and control the gas path on-off state of first end and external atmosphere;Pressure monitoring unit is configured to monitor the pressure of first end and second end.The utility model can quickly detect the performance parameter of the differential pressure valve to be measured, improve the test efficiency of differential pressure valve, simple structure, convenient operation, lower cost, facilitate in production line, laboratory and on-site maintenance and other multiple scenes popularization and application.

Description

Technical Field

[0001] This utility model relates to the field of differential pressure valve performance testing technology, and in particular to a differential pressure valve performance testing system. Background Technology

[0002] Differential pressure valves regulate the pressure difference in the air circuits of a train's suspension system. By connecting two air spring circuits, they maintain the vehicle's level and are a key safety component in the train's secondary suspension system. During train operation, differential pressure valves play a crucial role in improving vehicle smoothness and ride comfort. Therefore, during various maintenance cycles in the railway system, differential pressure valve performance testing systems are typically used to periodically test the performance of differential pressure valves to ensure their operational status meets safety standards.

[0003] However, the differential pressure valve performance testing systems currently in use (such as dual-valve test benches in laboratory environments) are complex in structure, expensive, and difficult to meet the needs of rapid on-site vehicle-side testing. Utility Model Content

[0004] The purpose of this invention is to provide a differential pressure valve performance testing system to solve one or more of the problems existing in the prior art, such as complex structure, high cost, and difficulty in meeting the needs of rapid on-site vehicle-side testing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a differential pressure valve performance testing system, comprising a gas supply unit, a gas path execution unit connected to the gas supply unit, a quick-connect sealing unit connected to the gas path execution unit, and a pressure monitoring unit connected to the quick-connect sealing unit. The quick-connect sealing unit is used to seal and connect to the first and second ends of the differential pressure valve under test. The gas supply unit is configured to supply gas to the gas path execution unit. The gas path execution unit is configured to: adjust the pressure of the first end and control the gas path connection between the first end and the gas supply unit, and control the gas path connection between the second end and the external atmosphere; or, adjust the pressure of the second end and control the gas path connection between the second end and the gas supply unit, and control the gas path connection between the first end and the external atmosphere. The pressure monitoring unit is configured to monitor the pressures of the first end and the second end.

[0006] Optionally, the pneumatic actuator includes a pressure regulating valve, a first control valve, a reversing valve, and a second control valve connected sequentially via pipelines. The inlet end of the pressure regulating valve is connected to the outlet pipeline of the gas supply unit. The outlet end of the first control valve is connected to the inlet port of the reversing valve. The vent port of the reversing valve is connected to the inlet end of the second control valve. The outlet end of the second control valve is open to the external atmosphere. The first and second vent ports of the reversing valve are connected to the quick-connect sealing unit. The pressure regulating valve is configured to regulate the first... The pressure at one end or the second end; the first control valve is configured to control the on / off state of the air passage between the air inlet of the reversing valve and the air supply unit; the reversing valve is configured to: cause the gas received at the air inlet of the reversing valve to flow to the first air outlet and from the second air outlet to the exhaust port; or, cause the gas received at the air inlet of the reversing valve to flow to the second air outlet and from the first air outlet to the exhaust port; the second control valve is configured to control the on / off state of the air passage between the air outlet of the reversing valve and the external atmosphere.

[0007] Optionally, the pressure regulating valve includes a pressure reducing valve, the first control valve includes a normally open solenoid valve, and the second control valve includes a normally closed solenoid valve.

[0008] Optionally, a silencer is provided on the outlet pipe of the second control valve.

[0009] Optionally, the quick-connect sealing unit includes two quick-connect sealing assemblies, each of which includes a quick-connect sealing connector and an adapter connected to the quick-connect sealing connector; the two quick-connect sealing connectors are respectively used for sealing insertion into the first end and the second end, and the two adapters are connected to the pneumatic actuator and the pressure monitoring unit.

[0010] Optionally, each of the quick-connect sealing connectors includes a hollow housing, a connecting shaft disposed within the hollow housing, a threaded joint connected to one end of the connecting shaft, a driving component connected to the other end of the connecting shaft, a sealing ring sleeved on the threaded joint, and an air pipe interface disposed on the hollow housing. The air pipe interface, the hollow housing, and the threaded joint are connected by an air passage. The air pipe interface is connected to the adapter, and the two threaded joints are respectively used for sealing insertion at the first end and the second end. The driving component is configured to drive the connecting shaft to move axially to cause the threaded joint to extend or retract.

[0011] Optionally, the adapter includes a three-way connector, the first interface of which is connected to the air pipe interface, the second interface of which is connected to the air circuit execution unit, and the third interface of which is connected to the pressure monitoring unit.

[0012] Optionally, the pressure monitoring unit includes two pressure sensors, which are respectively connected to the two adapters.

[0013] Optionally, the gas supply unit includes a gas source device.

[0014] Optionally, the first end is the inlet end of the differential pressure valve to be tested, and the second end is the outlet end of the differential pressure valve to be tested; or, the first end is the outlet end of the differential pressure valve to be tested, and the second end is the inlet end of the differential pressure valve to be tested.

[0015] Compared with the prior art, the differential pressure valve performance testing system provided by this utility model has the following advantages:

[0016] The differential pressure valve performance testing system provided by this utility model includes a gas supply unit, a gas path execution unit connected to the gas supply unit, a quick-connect sealing unit connected to the gas path execution unit, and a pressure monitoring unit connected to the quick-connect sealing unit. The quick-connect sealing unit is used to seal and connect to the first and second ends of the differential pressure valve under test. The gas supply unit is configured to supply gas to the gas path execution unit. The gas path execution unit is configured to: adjust the pressure of the first end and control the gas path connection between the first end and the gas supply unit, and control the gas path connection between the second end and the external atmosphere; or, adjust the pressure of the second end and control the gas path connection between the second end and the gas supply unit, and control the gas path connection between the first end and the external atmosphere. The pressure monitoring unit is configured to monitor the pressures of the first end and the second end. Therefore, the differential pressure valve performance testing system provided by this utility model can supply gas to the gas path execution unit through the gas supply unit, laying a solid foundation for testing the performance of the differential pressure valve under test. The quick-connect sealing unit enables rapid sealing connection with the port of the differential pressure valve under test. The pneumatic actuator then quickly regulates and controls the pressure at both ends of the valve. Simultaneously, the pressure monitoring unit collects real-time pressure data from both ends of the valve, allowing for rapid detection and identification of its performance parameters, thus improving testing efficiency. This differential pressure valve performance testing system requires no complex assembly or additional sealing tools, features a simple structure, is easy to operate, and has low cost, making it suitable for widespread application in various scenarios such as production lines, laboratories, and field maintenance. Attached Figure Description

[0017] Figure 1 A structural block diagram of a differential pressure valve performance testing system provided in one embodiment of this utility model;

[0018] Figure 2A schematic diagram illustrating the specific process of connecting the differential pressure valve performance testing system to the differential pressure valve under test, as provided in one embodiment of this utility model.

[0019] Figure 3 A schematic diagram of the first gas flow direction state of the reversing valve provided in one embodiment of the present utility model;

[0020] Figure 4 A schematic diagram of a second gas flow direction state of a reversing valve provided in one embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the structure of a quick-connect sealing connector provided in one embodiment of the present utility model;

[0022] The annotations in the attached figures are explained as follows:

[0023] 1-Gas supply unit, 11-Gas source device;

[0024] 2-Pneumatic actuator, 21-Pressure regulating valve, 22-First control valve, 23-Directional control valve, 231-Inlet port, 232-Exhaust port, 233-First outlet port, 234-Second outlet port, 24-Second control valve, 25-Silencer;

[0025] 3-Quick-connect sealing unit, 31-Quick-connect sealing assembly, 311-Quick-connect sealing connector, 3111-Hollow housing, 3112-Connecting shaft, 3113-Threaded joint, 3114-Drive component, 3115-Sealing ring, 3116-Air pipe interface, 312-Adapter;

[0026] 4-Pressure monitoring unit, 41-Pressure sensor;

[0027] 5 - Differential pressure valve to be tested, 51 - First end, 52 - Second end. Detailed Implementation

[0028] The differential pressure valve performance testing system proposed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, only used to facilitate and clarify the purpose of illustrating the embodiments of this utility model. Please refer to the drawings to make the purpose, features, and advantages of this utility model more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only used to complement the content disclosed in the specification, for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this utility model. Any modifications to the structure, changes in proportions, or adjustments to the size, if they are the same as or similar to the effects and purposes achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model. Specific design features of this utility model disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and usage environment. Furthermore, in the embodiments described below, the same reference numerals are sometimes used in different figures to denote the same parts or parts with the same function, and repeated descriptions are omitted.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] One embodiment of this utility model provides a differential pressure valve performance testing system. For details, please refer to... Figure 1 and Figure 2 , Figure 1 A structural block diagram of a differential pressure valve performance testing system provided in one embodiment of this utility model; Figure 2 This is a schematic diagram illustrating the specific process of connecting the differential pressure valve performance testing system to the differential pressure valve under test, as provided in one embodiment of this utility model. Figure 1 and Figure 2As can be seen, the testing system includes a gas supply unit 1, a gas path execution unit 2 connected to the gas supply unit 1, a quick-connect sealing unit 3 connected to the gas path execution unit 2, and a pressure monitoring unit 4 connected to the quick-connect sealing unit 3. The quick-connect sealing unit 3 is used to seal the first end 51 and the second end 52 of the differential pressure valve 5 under test. The gas supply unit 1 is configured to supply gas to the gas path execution unit 2. The gas path execution unit 2 is configured to: adjust the pressure of the first end 51 and control the gas path connection between the first end 51 and the gas supply unit 1, and control the gas path connection between the second end 52 and the external atmosphere; or, adjust the pressure of the second end 52 and control the gas path connection between the second end 52 and the gas supply unit 1, and control the gas path connection between the first end 51 and the external atmosphere. The pressure monitoring unit 4 is configured to monitor the pressure of the first end 51 and the second end 52.

[0031] Therefore, the differential pressure valve performance testing system provided in this embodiment can supply gas to the gas path execution unit 2 through the gas supply unit 1, laying a solid foundation for testing the performance of the differential pressure valve 5 under test. The quick-connect sealing unit 3 enables a rapid sealing connection with the port of the differential pressure valve 5 under test. The gas path execution unit 2 can then quickly adjust the pressure and control the on / off state of both ends of the differential pressure valve 5. Simultaneously, the pressure monitoring unit 4 collects pressure data from both ends of the differential pressure valve 5 in real time, enabling rapid detection and identification of the performance parameters of the differential pressure valve 5, thereby improving the testing efficiency of the differential pressure valve. The differential pressure valve performance testing system provided in this embodiment requires no complex assembly or additional sealing tools, has a simple structure, is easy to operate, and has a low cost, making it suitable for widespread application in various scenarios such as production lines, laboratories, and on-site maintenance.

[0032] For example, please continue to see Figure 2 as well as Figure 3 and Figure 4 ,in, Figure 3 A schematic diagram of the first gas flow direction state of the reversing valve provided in one embodiment of the present utility model; Figure 4 This is a schematic diagram illustrating a second gas flow direction state of a reversing valve provided in one embodiment of the present invention. Figures 2 to 4As can be seen, in some embodiments, the pneumatic actuator 2 includes a pressure regulating valve 21, a first control valve 22, a reversing valve 23, and a second control valve 24 connected sequentially via pipelines. The inlet end of the pressure regulating valve 21 is connected to the outlet pipeline of the gas supply unit 1. The outlet end of the first control valve 22 is connected to the inlet port 231 of the reversing valve 23. The exhaust port 232 of the reversing valve 23 is connected to the inlet end of the second control valve 24. The outlet end of the second control valve 24 is in communication with the external atmosphere. The first outlet port 233 and the second outlet port 234 of the reversing valve 23 are connected to the quick-connect sealing unit 3. The pressure regulating valve 21 is configured to regulate the pressure... The pressure at the first end 51 or the second end 52 is specified; the first control valve 22 is configured to control the on / off state of the air passage between the inlet 231 of the reversing valve 23 and the air supply unit 1; the reversing valve 23 is configured to: allow the gas received at the inlet 231 of the reversing valve 23 to flow to the first outlet 233 and from the second outlet 234 to the exhaust port 232; or allow the gas received at the inlet 231 of the reversing valve 23 to flow to the second outlet 234 and from the first outlet 233 to the exhaust port 232; the second control valve 24 is configured to control the on / off state of the air passage between the outlet of the reversing valve 23 and the external atmosphere. Therefore, by installing a pressure regulating valve 21 on the outlet pipeline of the air supply unit 1, the working pressure of different test items can be set, thereby enabling the detection of different performance characteristics of the differential pressure valve 5 under test. By setting the first control valve 22 and the second control valve 24, the air flow to the first end 51 and the second end 52 of the differential pressure valve 5 under test can be controlled, laying the foundation for testing the performance of the differential pressure valve 5 under test. By switching the reversing valve 23, the air flow direction can be selected, and the performance of the first end 51 and the second end 52 of the differential pressure valve 5 under test can be quickly tested without disassembling the test system.

[0033] It should be noted that the above is merely an exemplary description of the pneumatic actuator 2, and not a limitation of this utility model. Exemplarily, in some other embodiments, unlike the structure of the pneumatic actuator 2 described above, a reversing valve 23 is not required. The outlet pipe of the first control valve 22 and the inlet pipe of the second control valve 24 are directly connected to the quick-connect sealing unit 3. This allows for the first detection of the performance of one end of the differential pressure valve 5 under test. Then, by disassembling the quick-connect sealing units 3 at both ends of the differential pressure valve 5 under test, swapping the positions of the two ends, and then reinstalling the quick-connect sealing units 3, the performance of the other end of the differential pressure valve 5 under test can be detected, thereby completing the performance test of both ends of the differential pressure valve 5 under test.

[0034] Additionally, it should be noted that this utility model does not impose excessive limitations on the type of the reversing valve 23. For example, in some embodiments, the reversing valve 23 may be a manual valve of model 4HV210-08L.

[0035] It should be noted that, as those skilled in the art will understand, the present invention does not impose excessive limitations on the types of the pressure regulating valve 21, the first control valve 22, and the second control valve 24. Exemplarily, in some exemplary embodiments, the pressure regulating valve 21 includes a pressure reducing valve, the first control valve 22 includes a normally open solenoid valve, and the second control valve 24 includes a normally closed solenoid valve.

[0036] Preferably, a silencer 25 is provided on the outlet pipe of the second control valve 24. Thus, the silencer 25 reduces airflow noise, ensuring a quiet environment for the test system during operation.

[0037] Further reading is available upon request. Figure 2 ,from Figure 2 As can be seen, in some embodiments, the quick-connect sealing unit 3 includes two quick-connect sealing assemblies 31, each of which includes a quick-connect sealing connector 311 and an adapter 312 connected to the quick-connect sealing connector 311. The two quick-connect sealing connectors 311 are respectively used for sealing insertion into the first end 51 and the second end 52, and the two adapters 312 are connected to the pneumatic actuator 2 and the pressure monitoring unit 4. Thus, by sealing the quick-connect sealing connector 311 into the first end 51 and the second end 52 of the differential pressure valve 5 under test, the differential pressure valve 5 under test can be connected to the test system without leakage. By providing the adapter 312 on the quick-connect sealing connector 311, the pneumatic actuator 2 and the pressure monitoring unit 4 can be connected simultaneously, thereby realizing pneumatic communication between the pneumatic actuator 2 and the differential pressure valve 5 under test, while the pressure monitoring unit 4 can monitor the pressure at both ends of the differential pressure valve 5 under test.

[0038] For preferred options, please refer to [link / reference]. Figure 5 , Figure 5 This is a schematic diagram of the structure of a quick-connect sealing connector provided in one embodiment of the present invention, as shown below. Figure 5As shown, in some embodiments, each of the quick-connect sealing connectors 311 includes a hollow housing 3111, a connecting shaft 3112 disposed within the hollow housing 3111, a threaded connector 3113 connected to one end of the connecting shaft 3112, a drive member 3114 connected to the other end of the connecting shaft 3112, a sealing ring 3115 sleeved on the threaded connector 3113, and an air pipe interface 3116 disposed on the hollow housing 3111. The air pipe interface 3116, the hollow housing 3111, and the threaded connector 3113 are connected in an air passage. The air pipe interface 3116 is connected to the adapter 312. The two threaded connectors 3113 are respectively used for sealing insertion into the first end 51 and the second end 52. The drive member 3114 is configured to drive the connecting shaft 3112 to move axially to cause the threaded connector 3113 to extend or retract. Therefore, the drive component 3114 drives the connecting shaft 3112 to move axially, causing the threaded joint 3113 to extend. The threaded joint 3113 is inserted into both ends of the differential pressure valve 5 under test. Then, the drive component 3114 drives the connecting shaft 3112 to move axially, causing the threaded joint 3113 to retract. This causes the differential pressure valve 5 under test to squeeze the sealing ring 3115 on the threaded joint 3113 to achieve a sealing effect, so that the differential pressure valve 5 under test can be quickly connected to the test system without leakage.

[0039] It should be noted that this utility model does not impose excessive limitations on the type of the quick-connect sealing connector 311. Exemplarily, in some embodiments, the quick-connect sealing connector 311 can be a Grehill G80 internal thread quick connector of model G80L-M14E.

[0040] Furthermore, this utility model does not impose excessive limitations on the operation method of the driving component 3114 driving the connecting shaft 3112 to move axially. For example, as... Figure 5 As shown, in some embodiments, the connecting shaft 3112 can be driven to move axially by a pressure rod; in other embodiments, the connecting shaft 3112 can also be driven to move axially by air pressure.

[0041] Furthermore, the adapter 312 includes a three-way connector, the first interface of the three-way connector (not shown in the figure) is connected to the air pipe interface 3116, the second interface of the three-way connector (not shown in the figure) is connected to the air circuit execution unit 2, and the third interface of the three-way connector (not shown in the figure) is connected to the pressure monitoring unit 4.

[0042] Preferably, the pressure monitoring unit 4 includes two pressure sensors 41, which are respectively connected to two adapters 312. Thus, the pressure at both ends of the differential pressure valve 5 under test can be monitored by the two pressure sensors 41.

[0043] For example, in some embodiments, the pressure sensor 41 is a digital display pressure sensor. This allows for more accurate pressure data, thereby improving the testing accuracy of the testing system.

[0044] Exemplarily, in some embodiments, the air supply unit 1 includes an air source device 11. Thus, the air source device 11 can supply stable, clean compressed air to the air circuit execution unit 2.

[0045] It should be noted that in this utility model, the first end 51 is the inlet end of the differential pressure valve 5 to be tested, and the second end 52 is the outlet end of the differential pressure valve 5 to be tested; or, the first end 51 is the outlet end of the differential pressure valve 5 to be tested, and the second end 52 is the inlet end of the differential pressure valve 5 to be tested.

[0046] To better understand this utility model, the following exemplary embodiments are provided. Figures 2 to 5 The following is an illustrative description of the usage process of the differential pressure valve performance testing system provided by this utility model.

[0047] First, check the test system with the air source device 11 and pressure regulating valve 21 in the closed state, the first control valve 22 in the open state, and the reversing valve 23 in the open state. Figure 3 As shown, the second control valve 24 is closed, and the values ​​of the two pressure sensors 41 should display 0 kPa.

[0048] Then, press the levers on the two quick-connect sealing connectors 311 to insert the two threaded joints 3113 into the first end 51 and the second end 52 of the differential pressure valve 5 to be tested, respectively. Then release the levers to allow the differential pressure valve 5 to be tested to squeeze the sealing ring 3115 on the threaded joint 3113 to achieve a sealing effect. The differential pressure valve 5 to be tested can then be quickly connected to the test system without leakage.

[0049] Next, the performance parameters of the first end 51 of the differential pressure valve 5 under test are tested according to the following operation: Turn on the air source device 11 and slowly increase the opening of the pressure regulating valve 21. Observe that the value of the pressure sensor 41 connected to the first end 51 gradually increases. When the pressure sensor 41 connected to the second end 52 shows a value, the internal air path of the differential pressure valve 5 under test is open. Take the value displayed by the pressure sensor 41 connected to the first end 51 at this time as the opening pressure of the first end 51. Continue to increase the opening of the pressure regulating valve 21. When the value of the pressure sensor 41 connected to the first end 51 gradually rises to 400 kPa, close the first control valve 22. When the pressure at both ends of the differential pressure valve 5 under test stabilizes, the internal air path of the differential pressure valve 5 under test is closed. Take the difference between the values ​​of the two pressure sensors 41 at this time as the operating pressure difference of the first end 51 of the differential pressure valve 5 under test. If the pressure drop in the pipeline is less than 1.5 kPa within one minute of pressure holding, meaning the changes in the values ​​of both pressure sensors 41 are less than 1.5 kPa, then the airtightness of the differential pressure valve 5 from the first end 51 to the second end 52 is considered good. If the pressure drop in the pipeline is not less than 1.5 kPa, then the airtightness of the differential pressure valve 5 from the first end 51 to the second end 52 is considered poor. Then, the second control valve 24 is opened, connecting the second end 52 to the external atmosphere. The internal air passage of the differential pressure valve 5 will be opened again, and the values ​​of both pressure sensors 41 will decrease. After the value of the pressure sensor 41 connected to the second end 52 drops to 0 kPa and the pressure at both ends stabilizes, the internal air passage of the differential pressure valve 5 will be closed again. The value displayed by the pressure sensor 41 connected to the first end 51 at this time is taken as the closing pressure of the first end 51.

[0050] After testing the performance parameters of the first end 51 of the differential pressure valve 5 under test, the air source device 11 and pressure regulating valve 21 are returned to the closed state, the first control valve 22 is opened, the second control valve 24 is closed, and the reversing valve 23 is switched to the closed state. Figure 4 In the indicated state, the values ​​of both pressure sensors 41 should display 0 kPa. By repeating the above procedure for testing the performance parameters of the first end 51 of the differential pressure valve 5 under test, the performance parameters of the second end 52 of the differential pressure valve 5 under test can be tested.

[0051] In summary, the differential pressure valve performance testing system provided by this utility model has the following advantages: The differential pressure valve performance testing system includes a gas supply unit, a gas path execution unit connected to the gas supply unit, a quick-connect sealing unit connected to the gas path execution unit, and a pressure monitoring unit connected to the quick-connect sealing unit. The quick-connect sealing unit is used to seal and connect to the first and second ends of the differential pressure valve under test. The gas supply unit is configured to supply gas to the gas path execution unit. The gas path execution unit is configured to: adjust the pressure of the first end and control the gas path connection between the first end and the gas supply unit, and control the gas path connection between the second end and the external atmosphere; or, adjust the pressure of the second end and control the gas path connection between the second end and the gas supply unit, and control the gas path connection between the first end and the external atmosphere. The pressure monitoring unit is configured to monitor the pressures of the first end and the second end. Therefore, the differential pressure valve performance testing system provided by this utility model can supply gas to the gas path execution unit through the gas supply unit, laying a solid foundation for testing the performance of the differential pressure valve under test. The quick-connect sealing unit enables rapid sealing connection with the port of the differential pressure valve under test. The pneumatic actuator then quickly regulates and controls the pressure at both ends of the valve. Simultaneously, the pressure monitoring unit collects real-time pressure data from both ends of the valve, allowing for rapid detection and identification of its performance parameters, thus improving testing efficiency. This differential pressure valve performance testing system requires no complex assembly or additional sealing tools, features a simple structure, is easy to operate, and has low cost, making it suitable for widespread application in various scenarios such as production lines, laboratories, and field maintenance.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A differential pressure valve performance testing system, characterized in that, The testing system includes an air supply unit, an air circuit execution unit connected to the air supply unit, a quick-connect sealing unit connected to the air circuit execution unit, and a pressure monitoring unit connected to the quick-connect sealing unit. The quick-connect sealing unit is used to seal the first and second ends of the differential pressure valve under test. The gas supply unit is configured to supply gas to the gas path execution unit; The pneumatic actuator is configured to: adjust the pressure of the first end and control the pneumatic connection between the first end and the pneumatic supply unit, and control the pneumatic connection between the second end and the external atmosphere; or, adjust the pressure of the second end and control the pneumatic connection between the second end and the pneumatic supply unit, and control the pneumatic connection between the first end and the external atmosphere. The pressure monitoring unit is configured to monitor the pressure at the first end and the second end.

2. The differential pressure valve performance testing system as described in claim 1, characterized in that, The pneumatic actuator includes a pressure regulating valve, a first control valve, a reversing valve, and a second control valve connected in sequence via pipelines. The inlet end of the pressure regulating valve is connected to the outlet pipeline of the gas supply unit. The outlet end of the first control valve is connected to the air inlet of the reversing valve. The exhaust port of the reversing valve is connected to the inlet end of the second control valve. The outlet end of the second control valve is in communication with the external atmosphere. The first and second exhaust ports of the reversing valve are connected to the quick-connect sealing unit. The pressure regulating valve is configured to regulate the pressure at the first end or the second end; The first control valve is configured to control the on / off state of the air inlet of the reversing valve and the air passage of the air supply unit; The reversing valve is configured to: cause the gas received by the inlet of the reversing valve to flow to the first outlet and from the second outlet to the exhaust port; or, cause the gas received by the inlet of the reversing valve to flow to the second outlet and from the first outlet to the exhaust port. The second control valve is configured to control the opening and closing of the air passage between the outlet of the reversing valve and the outside atmosphere.

3. The differential pressure valve performance testing system as described in claim 2, characterized in that, The pressure regulating valve includes a pressure reducing valve, the first control valve includes a normally open solenoid valve, and the second control valve includes a normally closed solenoid valve.

4. The differential pressure valve performance testing system as described in claim 2, characterized in that, A silencer is installed on the outlet pipe of the second control valve.

5. The differential pressure valve performance testing system as described in claim 1, characterized in that, The quick-connect sealing unit includes two quick-connect sealing assemblies, each of which includes a quick-connect sealing connector and an adapter connected to the quick-connect sealing connector; the two quick-connect sealing connectors are respectively used for sealing insertion into the first end and the second end, and the two adapters are connected to the pneumatic actuator and the pressure monitoring unit.

6. The differential pressure valve performance testing system as described in claim 5, characterized in that, Each of the quick-connect sealing connectors includes a hollow housing, a connecting shaft disposed within the hollow housing, a threaded connector connected to one end of the connecting shaft, a drive component connected to the other end of the connecting shaft, a sealing ring sleeved on the threaded connector, and an air pipe interface disposed on the hollow housing. The air pipe interface, the hollow housing, and the threaded connector are connected by an air passage. The air pipe interface is connected to the adapter. The two threaded connectors are respectively used for sealing insertion at the first end and the second end. The drive component is configured to drive the connecting shaft to move axially to cause the threaded connector to extend or retract.

7. The differential pressure valve performance testing system as described in claim 6, characterized in that, The adapter includes a three-way connector, the first interface of which is connected to the air pipe interface, the second interface of which is connected to the air circuit execution unit, and the third interface of which is connected to the pressure monitoring unit.

8. The differential pressure valve performance testing system as described in claim 5, characterized in that, The pressure monitoring unit includes two pressure sensors, which are respectively connected to the two adapters.

9. The differential pressure valve performance testing system as described in claim 1, characterized in that, The gas supply unit includes a gas source device.

10. The differential pressure valve performance testing system as described in claim 1, characterized in that, The first end is the inlet end of the differential pressure valve to be tested, and the second end is the outlet end of the differential pressure valve to be tested; or, the first end is the outlet end of the differential pressure valve to be tested, and the second end is the inlet end of the differential pressure valve to be tested.

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