High altitude valve performance test system

Abstract

The utility model provides a kind of height valve performance test system, including gas supply unit, gas path execution unit, test tool and monitoring unit;Gas supply unit is configured as to gas path execution unit delivery gas;Gas path execution unit is configured as to adjust gas path pressure in gas path execution unit and control gas path on-off state in gas path execution unit;Test tool is configured as: fixedly installed the valve body of the height valve to be measured, and make gas path intercommunication between air spring interface and gas path execution unit, and drive control rod rotation;Monitoring unit includes flowmeter for monitoring the gas flow in the pipeline between gas path execution unit and test tool and pressure sensor for monitoring the pressure of air spring interface.The height valve performance test system provided by the utility model is simple in composition, convenient to operate, low in cost and suitable for rapid detection of the performance of the height valve to be measured beside train.

Description

Technical Field

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

[0002] The height adjustment valve (hereinafter referred to as "height valve") is a key component in the suspension system of rail vehicles. Its main function is to automatically adjust the air pressure in the air spring when the vehicle load changes, thereby maintaining a constant relative height between the car body and the rail surface, and ensuring the safety and comfort of vehicle operation.

[0003] During vehicle operation, when the load changes, the height valve automatically adjusts the air volume in the air springs according to the increase or decrease in load, keeping the air spring height within a set range, thus ensuring the reliability of the connection between vehicles. When the vehicle is running straight, if the vehicle body is within the normal vibration range, the height valve usually does not perform air intake or exhaust to avoid unnecessary airflow and energy loss. However, when the vehicle passes through a curve, the vehicle body tilts, causing changes in the load on the air springs on both sides of the bogie. The height valve can adjust the pressure of the air springs on both sides by generating air intake or exhaust to balance them, thereby reducing the tilt angle of the vehicle body and improving vehicle operation safety and ride comfort. In addition, in the event of air spring leakage, the height valve can also maintain the normal height of the air springs through an automatic air replenishment function, ensuring the stable operation of the suspension system.

[0004] To ensure that the performance of height valves meets design requirements, they typically need to be tested using a height valve performance testing system. However, currently used height valve performance testing systems (such as dual-valve test benches in laboratory environments) are complex in structure, expensive, and difficult to meet the needs of rapid on-site testing. Utility Model Content

[0005] The purpose of this invention is to provide a height 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.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a height valve performance testing system, wherein the testing system is used to test the performance of a height valve under test, the height valve under test includes a valve body, the valve body is provided with an air inlet and an air outlet, and an air spring interface for connecting an air spring, and a control rod for controlling the opening and closing of the air inlet and the air outlet is rotatably connected to the valve body; the testing system includes an air supply unit, an air path execution unit connected to the air supply unit, a testing fixture connected to the air path execution unit, and a monitoring unit on the pipeline connected between the air path execution unit and the testing fixture. 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 gas path pressure in the gas path execution unit and control the gas path on / off state in the gas path execution unit; the test fixture is configured to: fix the valve body, connect the air spring interface with the gas path execution unit, and drive the control rod to rotate; the monitoring unit includes a flow meter and a pressure sensor, the flow meter is used to monitor the gas flow rate in the pipeline between the gas path execution unit and the test fixture, and the pressure sensor is used to monitor the pressure of the air spring interface.

[0007] Optionally, the pneumatic actuator includes a pressure regulating valve and a switching 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, and the outlet end of the switching valve is connected to the test fixture.

[0008] Optionally, the test fixture includes a base, a quick-connect sealing assembly, and a displacement drive assembly. The base is used to fix the valve body and the displacement drive assembly, the quick-connect sealing assembly is used to connect the air spring interface with the air circuit actuator, and the displacement drive assembly is used to drive the control rod to rotate.

[0009] Optionally, the quick-connect sealing assembly includes a quick-connect sealing connector and an adapter connected to the quick-connect sealing connector. The quick-connect sealing connector is used to seal the insertion of the air spring interface, and the adapter is connected to both the pneumatic actuator and the pressure sensor.

[0010] Optionally, the quick-connect sealing connector 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. The threaded joint is used to seal the insertion of the air spring interface. The driving component is used 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 sensor.

[0012] Optionally, the displacement drive assembly includes a slide rail base, a lead screw, a support member, a rotating member, a digital display slider, and a clamping assembly. The digital display slider is equipped with a digital displacement table for displaying displacement data. The slide rail base is fixedly connected to the base platform, the support member is fixedly connected to both ends of the slide rail base, the lead screw is mounted between the two support members, one end of the lead screw passes through the support member and connects to the rotating member, the digital display slider is sleeved on the lead screw, the bottom of the digital display slider is slidably connected to the slide rail base, the top of the digital display slider is connected to the clamping assembly, and the clamping assembly is movably connected to the control rod.

[0013] Optionally, the clamping assembly includes a quick-connect cylindrical pin and two fixing blocks. The two fixing blocks are fixedly connected to the top of the digital display slider, and there is a preset active area between the two fixing blocks. The top end of the quick-connect cylindrical pin is movably inserted into the control rod, and the bottom end of the quick-connect cylindrical pin is slidably connected within the preset active area.

[0014] Optionally, the rotating component may include a handwheel or a motor.

[0015] Optionally, the gas supply unit includes a gas source device.

[0016] Compared with the prior art, the height valve performance testing system provided by this utility model has the following advantages:

[0017] This utility model provides a height valve performance testing system for testing the performance of a height valve under test. The height valve under test includes a valve body, which has an air inlet and an air outlet, as well as a spring interface for connecting an air spring. A control rod for controlling the opening and closing of the air inlet and the air outlet is rotatably connected to the valve body. The testing system includes an air supply unit, an air path execution unit connected to the air supply unit, a test fixture connected to the air path execution unit, and a monitoring unit on the pipeline connected between the air path execution unit and the test fixture. The air supply unit is configured as follows: Gas is supplied to the pneumatic actuator unit; the pneumatic actuator unit is configured to: adjust the pneumatic pressure in the pneumatic actuator unit and control the on / off state of the pneumatic path in the pneumatic actuator unit; the test fixture is configured to: fix the valve body, connect the air spring interface with the pneumatic actuator unit, and drive the control rod to rotate; the monitoring unit includes a flow meter and a pressure sensor, the flow meter is used to monitor the gas flow rate in the pipeline between the pneumatic actuator unit and the test fixture, and the pressure sensor is used to monitor the pressure of the air spring interface. Therefore, the height valve performance testing system provided by this utility model can supply gas to the pneumatic actuator unit through the gas supply unit, and then adjust the pneumatic pressure in the pneumatic actuator unit and control the on / off state of the pneumatic actuator unit through the pneumatic actuator unit. The test fixture can fix the valve body of the height valve under test, so that the height valve under test can remain stable during the test. Furthermore, the testing fixture not only connects the air spring interface of the height valve under test to the pneumatic actuator unit, but also rotates the control rod of the height valve, laying the foundation for testing the airtightness, non-sensing zone, and airflow characteristics of the height valve. Simultaneously, a flow meter monitors the gas flow rate in the pipeline between the pneumatic actuator unit and the testing fixture, and a pressure sensor monitors the pressure at the air spring interface, thereby enabling the testing of the height valve's airtightness, non-sensing zone, and airflow characteristics. The height valve performance testing system provided by this invention is simple in composition and can quickly detect and identify the performance parameters of the height valve under test using a flow meter and pressure sensor, thus improving the testing efficiency. Moreover, it is easy to operate, low in cost, and suitable for rapid performance testing of height valves near trains. Attached Figure Description

[0018] Figure 1 A structural block diagram of a height valve performance testing system provided in one embodiment of this utility model;

[0019] Figure 2 A flowchart illustrating the performance testing system for a height valve provided in one embodiment of this utility model;

[0020] Figure 3A schematic diagram of the connection between the test fixture and the height valve to be tested, provided in one embodiment of this utility model;

[0021] Figure 4 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-Valve body, 101-Air spring interface, 102-Control lever;

[0024] 2-Gas supply unit, 21-Gas source device;

[0025] 3-Pneumatic actuator, 31-Pressure regulating valve, 32-Switch valve;

[0026] 4-Test fixture, 41-Base platform, 42-Quick-connect sealing assembly, 421-Quick-connect sealing connector, 4211-Hollow housing, 4212-Connecting shaft, 4213-Threaded joint, 4214-Drive component, 4215-Sealing ring, 4216-Air pipe interface, 422-Adapter, 43-Displacement drive assembly, 431-Slide rail base, 432-Screw rod, 433-Support component, 434-Rotating component, 435-Digital display slider, 4351-Digital display displacement gauge, 436-Clamping assembly, 4361-Quick-connect cylindrical pin, 4362-Fixing block;

[0027] 5-Monitoring unit, 51-Flow meter, 52-Pressure sensor. Detailed Implementation

[0028] The following detailed description of the height valve performance testing system proposed in this utility model, in conjunction with the accompanying drawings and specific embodiments, will further illustrate its advantages and features. 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, used only 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 for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, 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, provided that the effects and purposes achieved by this utility model are the same or similar, 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 height valve performance testing system, which is used to test the performance of a height valve under test. Specifically, please refer to... Figures 1 to 3 , Figure 1 A structural block diagram of a height valve performance testing system provided in one embodiment of this utility model; Figure 2 A flowchart illustrating the performance testing system for a height valve provided in one embodiment of this utility model; Figure 3 This is a schematic diagram illustrating the connection between the testing fixture and the height valve to be tested, as provided in one embodiment of the present invention. Figures 1 to 3As can be seen, the height valve to be tested includes a valve body 1, which has an air inlet (not shown in the figure) and an exhaust outlet (not shown in the figure) and an air spring interface 101 for connecting an air spring. A control rod 102 for controlling the opening and closing of the air inlet and the exhaust outlet is rotatably connected to the valve body 1. The testing system includes an air supply unit 2, an air path execution unit 3 connected to the air supply unit 2, a testing fixture 4 connected to the air path execution unit 3, and a monitoring unit 5 connected to the pipeline between the air path execution unit 3 and the testing fixture 4. The air supply unit 2 is configured to supply air to the air path execution unit 3. Gas is supplied; the gas path execution unit 3 is configured to: adjust the gas path pressure in the gas path execution unit 3 and control the gas path on / off state in the gas path execution unit 3; the test fixture 4 is configured to: fix the valve body 1, connect the air spring interface 101 with the gas path execution unit 3, and drive the control rod 102 to rotate; the monitoring unit 5 includes a flow meter 51 and a pressure sensor 52, the flow meter 51 is used to monitor the gas flow rate in the pipeline between the gas path execution unit 3 and the test fixture 4, and the pressure sensor 52 is used to monitor the pressure of the air spring interface 101.

[0031] Therefore, the height valve performance testing system provided in this embodiment can supply gas to the air path execution unit 3 through the air supply unit 2, and then adjust the air path pressure and control the air path on / off state in the air path execution unit 3 through the air path execution unit 3. The valve body 1 of the height valve under test can be fixedly installed through the test fixture 4, so that the height valve under test can remain stable during the test. In addition, the test fixture 4 can not only connect the air path between the air spring interface 101 of the height valve under test and the air path execution unit 3, but also drive the control rod 102 of the height valve under test to rotate, laying the foundation for testing the air tightness, non-sensing zone and air flow characteristics of the height valve under test. At the same time, the flow meter 51 monitors the gas flow in the pipeline between the air path execution unit 3 and the test fixture 4, and the pressure sensor 52 monitors the pressure of the air spring interface 101, thereby enabling the testing of the air tightness, non-sensing zone and air flow characteristics of the height valve under test. The height valve performance testing system provided in this embodiment has a simple composition. It can quickly detect and identify the performance parameters of the height valve under test using a flow meter 51 and a pressure sensor 52, thereby improving the testing efficiency of the height valve. Furthermore, it is easy to operate, has low cost, and is suitable for rapid performance testing of height valves near trains.

[0032] It should be noted that this utility model does not impose excessive limitations on the types of the height valve to be measured, the flow meter 51, and the pressure sensor 52. For example, in some embodiments, the height valve to be measured can be an FBO height valve, the flow meter 51 can be a digital air flow meter, and the pressure sensor 52 can be a digital display pressure sensor.

[0033] For example, please continue to see Figure 2 ,like Figure 2 As shown, in some embodiments, the pneumatic actuator 3 includes a pressure regulating valve 31 and a switching valve 32 connected in sequence via pipelines. The inlet end of the pressure regulating valve 31 is connected to the outlet pipeline of the air supply unit 2, and the outlet end of the switching valve 32 is connected to the test fixture 4. Thus, by installing the pressure regulating valve 31 on the outlet pipeline of the air supply unit 2, the pneumatic pressure in the pneumatic actuator 3 can be adjusted, thereby setting the working pressure for different test items. By installing the switching valve 32, the on / off state of the pneumatic actuator 3 can be controlled, laying the foundation for testing the performance of the height valve under test.

[0034] It should be noted that this utility model does not impose excessive limitations on the types of the pressure regulating valve 31 and the switching valve 32. For example, in some embodiments, the pressure regulating valve 31 can be a filter pressure reducing valve, and the switching valve 32 can be a shut-off valve.

[0035] For the preferred options, please continue reading. Figure 3 ,like Figure 3 As shown, in some embodiments, the test fixture 4 includes a base 41, a quick-connect sealing assembly 42, and a displacement drive assembly 43. The base 41 is used to fix the valve body 1 and the displacement drive assembly 43. The quick-connect sealing assembly 42 is used to connect the air spring interface 101 with the air circuit execution unit 3. The displacement drive assembly 43 is used to drive the control rod 102 to rotate. Therefore, by integrating the base 41, quick-connect sealing assembly 42, and displacement drive assembly 43 into a single test fixture 4, the ease of operation of the test system can be improved, making it more suitable for quickly testing the performance of the height valve under test near a train.

[0036] Exemplary, in some of the exemplary embodiments, the base 41 is a honeycomb panel, and the base 41 is provided with a plurality of threaded through holes, with a center-to-center distance of 25 mm between adjacent threaded through holes, thereby facilitating the expansion and installation of various types of height valves to be measured and displacement drive assemblies 43.

[0037] Furthermore, the quick-connect sealing assembly 42 includes a quick-connect sealing connector 421 and an adapter 422 connected to the quick-connect sealing connector 421. The quick-connect sealing connector 421 is used to seal the insertion of the air spring interface 101, and the adapter 422 is connected to both the pneumatic actuator 3 and the pressure sensor 52. Thus, sealing the air spring interface 101 with the quick-connect sealing connector 421 is simple to operate, provides good sealing, and allows for quick connection of the height valve to be tested without leakage. By connecting the adapter 422 to the quick-connect sealing connector 421, the height valve to be tested can communicate with the pneumatic actuator 3. Simultaneously, the pressure sensor 52 can be connected to the adapter 422 to monitor the pressure of the air spring interface 101.

[0038] For preferred options, please refer to [link / reference]. Figure 4 , Figure 4 This is a schematic diagram of the structure of a quick-connect sealing connector 421 provided in one embodiment of the present invention, as shown below. Figure 4 As shown, in some embodiments, the quick-connect sealing connector 421 includes a hollow housing 4211, a connecting shaft 4212 disposed within the hollow housing 4211, a threaded connector 4213 connected to one end of the connecting shaft 4212, a driving member 4214 connected to the other end of the connecting shaft 4212, a sealing ring 4215 sleeved on the threaded connector 4213, and an air pipe interface 4216 disposed on the hollow housing 4211. The air pipe interface 4216, the hollow housing 4211, and the threaded connector 4213 are connected by an air passage. The air pipe interface 4216 is connected to the adapter 422. The threaded connector 4213 is used to seal and insert the air spring interface 101. The driving member 4214 is used to drive the connecting shaft 4212 to move axially to cause the threaded connector 4213 to extend and retract. Therefore, the drive component 4214 drives the connecting shaft 4212 to move axially, causing the threaded joint 4213 to extend. The threaded joint 4213 is inserted into the air spring interface 101 of the height valve to be tested. Then, the drive component 4214 drives the connecting shaft 4212 to move axially, causing the threaded joint 4213 to retract. This causes the height valve to be tested to press the sealing ring 4215 on the threaded joint 4213 to achieve a sealing effect, so that the height valve to be tested 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 421. Exemplarily, in some embodiments, the quick-connect sealing connector 421 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 driving the connecting shaft 4212 axially with the driving member 4214. For example, as... Figure 4 As shown, in some embodiments, the connecting shaft 4212 can be driven to move axially by a pressure rod; in other embodiments, the connecting shaft 4212 can also be driven to move axially by air pressure.

[0041] For further details, please continue to see [link / reference]. Figure 3 ,like Figure 3 As shown, in some embodiments, the adapter 422 includes a tee connector, the first interface of the tee connector (not shown) is connected to the air tube interface 4216, the second interface of the tee connector (not shown) is connected to the air circuit execution unit 3, and the third interface of the tee connector (not shown) is connected to the pressure sensor 52.

[0042] For the preferred options, please continue reading. Figure 3 ,like Figure 3 As shown, in some embodiments, the displacement drive assembly 43 includes a slide rail base 431, a lead screw 432, a support member 433, a rotating member 434, a digital display slider 435, and a clamping assembly 436. The digital display slider 435 is provided with a digital displacement meter 4351 for displaying displacement data. The slide rail base 431 is fixedly connected to the base platform 41, the support member 433 is fixedly connected to both ends of the slide rail base 431, the lead screw 432 is mounted between the two support members 433, one end of the lead screw 432 passes through the support member 433 and is connected to the rotating member 434, the digital display slider 435 is sleeved on the lead screw 432, the bottom of the digital display slider 435 is slidably connected to the slide rail base 431, the top of the digital display slider 435 is connected to the clamping assembly 436, and the clamping assembly 436 is movably connected to the control rod 102. Therefore, the rotation of the rotating component 434 drives the lead screw 432 to rotate, thereby allowing the digital display slider 435 sleeved on the lead screw 432 to move axially along the length of the lead screw 432. This, in turn, causes the top of the digital display slider 435 to rotate via the control rod 102 connected to the clamping assembly 436. By setting a digital displacement gauge 4351 on the digital display slider 435, the position of the digital display slider 435 can be displayed, laying a good foundation for testing the non-sensitive zone and airflow characteristics of the height valve under test.

[0043] Furthermore, the clamping assembly 436 includes a quick-connect cylindrical pin 4361 and two fixing blocks 4362. The two fixing blocks 4362 are fixedly connected to the top of the digital display slider 435, and there is a preset active area between the two fixing blocks 4362. The top end of the quick-connect cylindrical pin 4361 is movably inserted into the control rod 102, and the bottom end of the quick-connect cylindrical pin 4361 is slidably connected within the preset active area.

[0044] For example, such as Figure 3 As shown, the quick-connect cylindrical pin 4361 includes a cylindrical head (not shown) and a cylindrical pin rod (not shown). The diameter of the cylindrical head is larger than the diameter of the connecting through hole on the control rod 102, and the diameter of the cylindrical pin rod is slightly smaller than the diameter of the connecting through hole on the control rod 102 (not shown), so that the quick-connect cylindrical pin 4361 can be movably inserted into the connecting through hole on the control rod 102. The two fixing blocks 4362 are L-shaped corner brackets. One end of each fixing block 4362 is fixedly connected to the top of the digital display slider 435, and the distance between the other ends of the two fixing blocks 4362 is slightly larger than the diameter of the cylindrical pin rod, so that the bottom end of the quick-connect cylindrical pin 4361 can slide within the preset active area formed between the two fixing blocks 4362.

[0045] It should be noted that, as those skilled in the art will understand, the rotating component 434 includes a handwheel or a motor, thereby driving the lead screw 432 to rotate. When the rotating component 434 is a handwheel, the center of the handwheel can be fixedly connected to the lead screw 432; when the rotating component 434 is a motor, a bracket can be installed on the support 433 to fix the motor, and the drive end of the motor can be connected to the lead screw 432 to drive the lead screw 432 to rotate.

[0046] Exemplarily, in some embodiments, the air supply unit 2 includes an air source device 21. Thus, the air source device 21 can supply stable, clean compressed air to the air circuit execution unit 3.

[0047] To better understand this utility model, the following exemplary embodiments are provided. Figures 2 to 4 The following is an illustrative description of the usage process of the height valve performance testing system provided by this utility model.

[0048] First, check the test system with the air source device 21 and the switch valve 32 in the closed state. The pressure sensor 52 should display 0 kPa.

[0049] Then, the height valve to be tested is installed in the corresponding position on the base 41, and the quick-connect cylindrical pin 4361 is inserted into the connecting through hole on the control rod 102, so that the bottom end of the quick-connect cylindrical pin 4361 can slide within the preset active area formed between the two fixed blocks 4362. In addition, by pressing the pressure rod on the quick-connect sealing connector 421, the threaded joint 4213 is inserted into the air spring interface 101 of the height valve to be tested, and then the pressure rod is released, so that the height valve to be tested squeezes the sealing ring 4215 on the threaded joint 4213 to achieve a sealing effect, and the height valve to be tested can be quickly connected to the test system without leakage.

[0050] Next, turn on the air supply device 21, open the switch valve 32, and slowly increase the opening of the pressure regulating valve 31. When the pressure sensor 52 displays a value of 400 kPa, close the switch valve 32. Maintain the pressure for 1 minute. If the pipeline pressure drop is no greater than 1.5 kPa, that is, the change in the pressure sensor 52 value is no greater than 1.5 kPa, then the air tightness of the height valve under test is deemed qualified; if the pipeline pressure drop is greater than 1.5 kPa, then the air tightness of the height valve under test is deemed unqualified.

[0051] After the airtightness test, the non-sensing zone of the height valve under test is tested. First, the switch valve 32 is opened to open the air passage. The control lever 102 is rotated clockwise. When the flow meter 51 first displays a value, the displacement value P1 on the digital displacement gauge 4351 is recorded. Then, the handwheel is rotated counterclockwise. When the flow meter 51 displays a value again, the displacement value P2 on the digital displacement gauge 4351 is recorded. The size Δp of the non-sensing zone of the height valve under test is obtained according to the formula Δp=|P2-P1|. If 6mm≤Δp≤14mm, the non-sensing zone of the height valve under test is judged to be qualified; otherwise, the non-sensing zone of the height valve under test is judged to be unqualified.

[0052] Next, after the non-sensing zone test of the height valve under test is completed, the digital display slider 435 is moved along the direction from position P2 to position P1 by |(P2-P1) / 2| until it reaches the center position of the height valve under test, and then the air flow characteristic test is performed. Using the center position of the height valve under test as a reference, the digital display slider 435 is moved 20mm to the left and right of the slide rail base 431 respectively. Under an air source pressure of 400 kPa, the flow rate values ​​at the two points are recorded by the flow meter 51. If the flow rate values ​​at both points are greater than 100 L / min, the air flow characteristic of the height valve under test is deemed qualified; otherwise, the air flow characteristic of the height valve under test is deemed unqualified.

[0053] In summary, the height valve performance testing system provided by this utility model has the following advantages: The height valve performance testing system provided by this utility model is used to test the performance of a height valve under test. The height valve under test includes a valve body, which has an air inlet and an air outlet, as well as a spring interface for connecting an air spring. A control rod for controlling the opening and closing of the air inlet and the air outlet is rotatably connected to the valve body. The testing system includes an air supply unit, an air path execution unit connected to the air supply unit, a testing fixture connected to the air path execution unit, and a monitoring device on the pipeline connecting the air path execution unit and the testing fixture. The system comprises a testing unit; a gas supply unit configured to supply gas to the gas path execution unit; a gas path execution unit configured to adjust the gas path pressure and control the gas path on / off state; a testing fixture configured to fix the valve body, connect the air spring interface to the gas path execution unit, and drive the control rod to rotate; and a monitoring unit including a flow meter and a pressure sensor. The flow meter monitors the gas flow rate in the pipeline between the gas path execution unit and the testing fixture, and the pressure sensor monitors the pressure at the air spring interface. Therefore, the height valve performance testing system provided by this invention can supply gas to the gas path execution unit through the gas supply unit, and then adjust the gas path pressure and control the gas path on / off state through the gas path execution unit. The testing fixture can fix the valve body of the height valve under test, ensuring the stability of the height valve during the test. Furthermore, the testing fixture not only connects the air spring interface of the height valve under test to the pneumatic actuator unit, but also rotates the control rod of the height valve, laying the foundation for testing the airtightness, non-sensing zone, and airflow characteristics of the height valve. Simultaneously, a flow meter monitors the gas flow rate in the pipeline between the pneumatic actuator unit and the testing fixture, and a pressure sensor monitors the pressure at the air spring interface, thereby enabling the testing of the height valve's airtightness, non-sensing zone, and airflow characteristics. The height valve performance testing system provided by this invention is simple in composition and can quickly detect and identify the performance parameters of the height valve under test using a flow meter and pressure sensor, thus improving the testing efficiency. Moreover, it is easy to operate, low in cost, and suitable for rapid performance testing of height valves near trains.

[0054] 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 height valve performance testing system, characterized in that, The testing system is used to test the performance of the height valve under test. The height valve under test includes a valve body, an air inlet and an exhaust outlet, and an air spring interface for connecting an air spring. A control rod for controlling the opening and closing of the air inlet and the exhaust outlet is rotatably connected to the valve body. The testing system includes a gas supply unit, a gas path execution unit connected to the gas supply unit, a testing fixture connected to the gas path execution unit, and a monitoring unit connected to the pipeline between the gas path execution unit and the testing fixture. The gas supply unit is configured to supply gas to the gas path execution unit; The pneumatic actuator is configured to: adjust the pneumatic pressure in the pneumatic actuator and control the on / off state of the pneumatic circuit in the pneumatic actuator; The test fixture is configured to: fix the valve body in place, connect the air spring interface with the air circuit execution unit, and drive the control rod to rotate; The monitoring unit includes a flow meter and a pressure sensor. The flow meter is used to monitor the gas flow rate in the pipeline between the gas path actuator and the test fixture, and the pressure sensor is used to monitor the pressure of the air spring interface.

2. The height valve performance testing system as described in claim 1, characterized in that, The pneumatic actuator includes a pressure regulating valve and a switching 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, and the outlet end of the switching valve is connected to the test fixture.

3. The height valve performance testing system as described in claim 1, characterized in that, The test fixture includes a base, a quick-connect sealing assembly, and a displacement drive assembly. The base is used to fix the valve body and the displacement drive assembly. The quick-connect sealing assembly is used to connect the air spring interface with the air circuit actuator. The displacement drive assembly is used to drive the control rod to rotate.

4. The height valve performance testing system as described in claim 3, characterized in that, The quick-connect sealing assembly includes a quick-connect sealing connector and an adapter connected to the quick-connect sealing connector. The quick-connect sealing connector is used to seal the insertion of the air spring interface. The adapter is connected to both the pneumatic actuator and the pressure sensor.

5. The height valve performance testing system as described in claim 4, characterized in that, The quick-connect sealing connector 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. The threaded joint is used to seal the insertion of the air spring interface. The driving component is used to drive the connecting shaft to move axially to cause the threaded joint to extend and retract.

6. The height valve performance testing system as described in claim 5, 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 sensor.

7. The height valve performance testing system as described in claim 3, characterized in that, The displacement driving assembly includes a slide rail base, a lead screw, a support component, a rotating component, a digital display slider, and a clamping assembly. The digital display slider is equipped with a digital display displacement table for displaying displacement data. The slide rail base is fixedly connected to the base platform, the support member is fixedly connected to both ends of the slide rail base, the lead screw is mounted between the two support members, one end of the lead screw passes through the support member and is connected to the rotating member, the digital display slider is sleeved on the lead screw, the bottom of the digital display slider is slidably connected to the slide rail base, the top of the digital display slider is connected to the clamping assembly, and the clamping assembly is movably connected to the control rod.

8. The height valve performance testing system as described in claim 7, characterized in that, The clamping assembly includes a quick-connect cylindrical pin and two fixing blocks. The two fixing blocks are fixedly connected to the top of the digital display slider, and there is a preset active area between the two fixing blocks. The top end of the quick-connect cylindrical pin is movably inserted into the control rod, and the bottom end of the quick-connect cylindrical pin is slidably connected within the preset active area.

9. The height valve performance testing system as described in claim 7, characterized in that, The rotating component includes a handwheel or a motor.

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

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