Comprehensive test system for vehicle high-pressure hydrogen pressure reducing valve

Abstract

The utility model discloses a comprehensive test system for a high-pressure hydrogen pressure reducing valve for a vehicle. The comprehensive test system comprises a pressurizing pipeline, an emptying pipeline, a recycling pipeline, a pressure regulating mechanism, a pressure monitoring instrument, an industrial personal computer and a PLC (Programmable Logic Controller), the pressure adjusting mechanism comprises a first pressure reducing valve and a second pressure reducing valve. The pressure monitoring instrument comprises a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor, a fifth pressure sensor and a sixth pressure sensor. Flow characteristic test, pressure pulse test and service life test are carried out on the tested pressure reducing valve on one device, repeated pipeline disassembly is not needed between different tests, various tests can be carried out through one-time connection, meanwhile, a recovery storage tank is arranged, and a large amount of hydrogen can be saved. The comprehensive test system for the high-pressure hydrogen pressure reducing valve for the vehicle can adjust the test pressure, adjust the exhaust flow and control the test pressurization rate.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive high-pressure hydrogen pressure reducing valve testing device, and in particular to a comprehensive testing system for automotive high-pressure hydrogen pressure reducing valve. Background Technology

[0002] Hydrogen fuel cell vehicles possess advantages such as excellent environmental performance, high conversion efficiency, short refueling time, and long driving range, making them a crucial development direction for next-generation new energy vehicles. As a key component in hydrogen supply and regulation systems, pressure reducing valves require important technical characteristics such as resistance to hydrogen embrittlement, high pressure resistance, and good sealing. Currently, high-pressure hydrogen pressure reducing valves are largely in the research and development stage, lacking corresponding product standards. Numerous testing items are required for pressure reducing valves, including leakage tests, hydraulic circulation tests, pressure pulse tests, life tests, flow characteristic tests, and opening pressure tests. Repeated disassembly and reassembly of pipelines are necessary between different tests, resulting in low efficiency. Therefore, it is necessary to propose a comprehensive testing system for automotive high-pressure hydrogen pressure reducing valves to address these issues. Utility Model Content

[0003] The purpose of this invention is to provide a comprehensive testing system for automotive high-pressure hydrogen pressure reducing valves, in order to solve the problem of low efficiency caused by the need for repeated disassembly and reassembly of pipelines between different test chambers of current automotive high-pressure hydrogen pressure reducing valves.

[0004] This utility model provides a comprehensive test system for a high-pressure hydrogen pressure reducing valve for vehicles, including: a pressurization pipeline, an venting pipeline, a recovery pipeline, a pressure regulating mechanism, a pressure monitoring instrument, an industrial control computer, and a PLC; the pressure regulating mechanism includes a first pressure reducing valve and a second pressure reducing valve, and the pressure monitoring instrument includes a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor, a fifth pressure sensor, and a sixth pressure sensor;

[0005] One end of the pressurization pipeline is connected to a high-pressure hydrogen gas source, and the other end of the pressurization pipeline is sequentially connected to a first pressure sensor, a first pressure reducing valve, a second pressure sensor, a buffer tank, a first gas control valve, an automatic control proportional valve, a third pressure sensor, and a pressurization interface.

[0006] One end of the venting pipeline is connected to the venting system, and the other end of the venting pipeline is connected in sequence to a manual valve, a flow meter, an automatic control opening regulating valve, a second pneumatic control valve, a fourth pressure sensor, and a venting interface.

[0007] One end of the recovery pipeline is connected to the recovery storage tank, and the other end of the recovery pipeline is sequentially connected to the sixth pressure sensor, the second pressure reducing valve, the fifth pressure sensor, the third pneumatic control valve, and the recovery interface.

[0008] The industrial control computer is connected to the PLC, and the PLC is connected to the pressure monitoring instrument, the first pneumatic control valve, the second pneumatic control valve, the third pneumatic control valve, the automatic control proportional valve, the automatic control opening regulating valve, and the flow meter.

[0009] Furthermore, the booster interface is connected to the air inlet of the pressure reducing valve under test.

[0010] Furthermore, the recovery interface is connected to the air inlet of the pressure reducing valve under test.

[0011] Furthermore, the venting interface is connected to the outlet of the pressure reducing valve under test.

[0012] This invention offers the following advantages: A comprehensive testing system for automotive high-pressure hydrogen pressure reducing valves allows for flow characteristic testing, pressure pulse testing, and lifespan testing of the valve on a single device. This eliminates the need for repeated disassembly of pipelines between different tests, enabling multiple tests to be performed with a single connection. Furthermore, the system includes a recovery storage tank, saving a significant amount of hydrogen. This comprehensive testing system for automotive high-pressure hydrogen pressure reducing valves allows for adjustment of test pressure, exhaust flow rate, and test pressurization rate. Attached Figure Description

[0013] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This utility model provides a structural diagram of a comprehensive testing system for a high-pressure hydrogen pressure reducing valve for vehicles.

[0015] Diagram Explanation: PR1 - First pressure reducing valve; PR2 - Second pressure reducing valve; PI1 - First pressure sensor; PI2 - Second pressure sensor; PI3 - Third pressure sensor; PI4 - Fourth pressure sensor; PI5 - Fifth pressure sensor; PI6 - Sixth pressure sensor; F1 - First pneumatic control valve; F2 - Second pneumatic control valve; F3 - Third pneumatic control valve; E1 - Automatic control proportional valve; NV1 - Manual valve; FT - Flow meter; M1 - Automatic control opening regulating valve. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be pointed out that the following detailed description is illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0017] Please see Figure 1 This utility model provides a comprehensive test system for a high-pressure hydrogen pressure reducing valve for vehicles, including: a pressurization pipeline, an venting pipeline, a recovery pipeline, a pressure regulating mechanism, pressure monitoring instruments, an industrial control computer, and a PLC; the pressure regulating mechanism includes a first pressure reducing valve PR1 and a second pressure reducing valve PR2, and the pressure monitoring instruments include a first pressure sensor PI1, a second pressure sensor PI2, a third pressure sensor PI3, a fourth pressure sensor PI4, a fifth pressure sensor PI5, and a sixth pressure sensor PI6.

[0018] Specifically, one end of the pressurization pipeline is connected to a high-pressure hydrogen source, and the other end of the pressurization pipeline is sequentially connected to the first pressure sensor PI1, the first pressure reducing valve PR1, the second pressure sensor PI2, the buffer tank, the first pneumatic control valve F1, the automatic control proportional valve E1, the third pressure sensor PI3, and the pressurization interface. The pressurization interface is connected to the inlet of the pressure reducing valve under test.

[0019] One end of the venting pipeline is connected to the venting system, and the other end of the venting pipeline is connected in sequence to the manual valve NV1, the flow meter FT, the automatic control opening regulating valve M1, the second pneumatic control valve F2, the fourth pressure sensor PI4, and the venting interface; the venting interface is connected to the outlet of the pressure reducing valve to be tested.

[0020] One end of the recovery pipeline is connected to the recovery storage tank, and the other end is sequentially connected to the sixth pressure sensor PI6, the second pressure reducing valve PR2, the fifth pressure sensor PI5, the third pneumatic control valve F3, and the recovery interface. The recovery interface is connected to the air inlet of the pressure reducing valve under test.

[0021] The industrial control computer is connected to the PLC, which in turn is connected to the pressure monitoring instrument, the first pneumatic control valve F1, the second pneumatic control valve F2, the third pneumatic control valve F3, the automatic control proportional valve E1, the automatic control opening regulating valve M1, and the flow meter FT. The industrial control computer is used to display the pressure and flow rate within the comprehensive test system for automotive high-pressure hydrogen pressure reducing valves, while the PLC is used to control the first pneumatic control valve F1, the second pneumatic control valve F2, the third pneumatic control valve F3, the automatic control proportional valve E1, and the automatic control opening regulating valve M1.

[0022] This utility model's comprehensive testing system for automotive high-pressure hydrogen pressure reducing valves is mainly used for conducting flow characteristic tests, pressure pulse tests, and life tests on automotive high-pressure hydrogen pressure reducing valves. Before testing, the booster port, recovery port, and the inlet of the pressure reducing valve under test are connected. The vent port is connected to the outlet of the pressure reducing valve under test. The test to be performed is selected via the industrial control computer.

[0023] During the flow characteristic test, a booster line and a venting line are required. During the test, keep the manual valve NV1, the first pneumatic control valve F1, the second pneumatic control valve F2, and the automatic control proportional valve E1 fully open. Keep the third pneumatic control valve F3 fully closed. Adjust the first pressure reducing valve PR1 so that the second pressure sensor PI2 displays the required test value. During the test, the industrial control computer controls the opening of the automatic control valve M1 from 0 to the maximum design flow rate of the pressure reducing valve under test, and then gradually closes it. Read the readings from the third pressure sensor PI3, the fourth pressure sensor PI4, and the flow meter FT to plot the pressure-flow curve.

[0024] During the pressure pulse test, a pressurization line and a venting line are required. The manual valve NV1, automatic control opening adjustment valve M1, and automatic control proportional valve E1 must be fully open during the test. The third pneumatic control valve F3 must be fully closed. The first pressure reducing valve PR1 must be adjusted so that the second pressure sensor PI2 displays the required test value. During the test, the industrial control computer controls the first pneumatic control valve F1 to open and apply pulse pressure to the pressure reducing valve under test. Then, the first pneumatic control valve F1 is closed, and the second pneumatic control valve F2 is opened to allow the pressure reducing valve under test to vent from the outlet. The third pressure sensor PI3 is monitored until it reaches atmospheric pressure. Finally, the second pneumatic control valve F2 is closed, completing one cycle.

[0025] Life testing requires the use of pressurization lines, evacuation lines, and recovery lines. Life testing is divided into two types: inlet pressure cycling and outlet pressure cycling.

[0026] During the inlet pressure cycling test, the second pneumatic control valve F2 is kept fully closed and the first pneumatic control valve F1 is fully open. The first pressure reducing valve PR1 is adjusted so that the second pressure sensor PI2 displays the required test value. During the test, the automatic control proportional valve E1 and the third pneumatic control valve F3 are controlled to ensure that the air inlet of the pressure reducing valve under test circulates within the test pressure range.

[0027] During the outlet pressure cycle test, keep the manual valve NV1 and the automatic control proportional valve E1 fully open. Keep the third pneumatic control valve F3 fully closed. Adjust the first pressure reducing valve PR1 so that the second pressure sensor PI2 displays the required value. Adjust the opening of the automatic control valve M1 through a pre-test to ensure the flow meter FT reading is within the design range. After the cycle test begins, close the second pneumatic control valve F2, open the first pneumatic control valve F1, and pressurize the pressure reducing valve under test. After the pressure of the fourth pressure sensor PI4 stabilizes, open the second pneumatic control valve F2 to expel air from the outlet of the pressure reducing valve under test. After the pressure of the fourth pressure sensor PI4 stabilizes, close the second pneumatic control valve F2 to complete one cycle. Keep the first pneumatic control valve F1 open during the test.

[0028] This utility model relates to a comprehensive testing system for high-pressure hydrogen pressure reducing valves for vehicles. It enables the testing of flow characteristics, pressure pulse, and lifespan of the pressure reducing valves on a single device. There is no need to repeatedly disassemble pipelines between different tests, and multiple tests can be performed with a single connection. It also features a recovery storage tank, which can save a significant amount of hydrogen.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in sequences other than those illustrated or described herein.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A comprehensive testing system for a vehicle-mounted high-pressure hydrogen pressure reducing valve, characterized in that, include: The system includes a pressurization pipeline, an evacuation pipeline, a recovery pipeline, a pressure regulating mechanism, pressure monitoring instruments, an industrial control computer, and a PLC; the pressure regulating mechanism includes a first pressure reducing valve (PR1) and a second pressure reducing valve (PR2), and the pressure monitoring instruments include a first pressure sensor (PI1), a second pressure sensor (PI2), a third pressure sensor (PI3), a fourth pressure sensor (PI4), a fifth pressure sensor (PI5), and a sixth pressure sensor (PI6); One end of the pressurization pipeline is connected to a high-pressure hydrogen gas source, and the other end of the pressurization pipeline is sequentially connected to a first pressure sensor (PI1), a first pressure reducing valve (PR1), a second pressure sensor (PI2), a buffer tank, a first gas control valve (F1), an automatic control proportional valve (E1), a third pressure sensor (PI3), and a pressurization interface. One end of the venting pipeline is connected to the venting system, and the other end of the venting pipeline is connected in sequence to a manual valve (NV1), a flow meter (FT), an automatic control opening regulating valve (M1), a second pneumatic control valve (F2), a fourth pressure sensor (PI4), and a venting interface. One end of the recovery pipeline is connected to the recovery storage tank, and the other end of the recovery pipeline is connected in sequence to the sixth pressure sensor (PI6), the second pressure reducing valve (PR2), the fifth pressure sensor (PI5), the third pneumatic control valve (F3), and the recovery interface. The industrial control computer is connected to the PLC, and the PLC is connected to the pressure monitoring instrument, the first pneumatic control valve (F1), the second pneumatic control valve (F2), the third pneumatic control valve (F3), the automatic control proportional valve (E1), the automatic control opening regulating valve (M1), and the flow meter (FT).

2. The comprehensive test system for a high-pressure hydrogen pressure reducing valve for vehicles as described in claim 1, characterized in that, The booster interface is connected to the air inlet of the pressure reducing valve under test.

3. The comprehensive testing system for a vehicle-mounted high-pressure hydrogen pressure reducing valve as described in claim 1, characterized in that, The recovery interface is connected to the air inlet of the pressure reducing valve under test.

4. The comprehensive testing system for a vehicle-mounted high-pressure hydrogen pressure reducing valve as described in claim 1, characterized in that, The venting interface is connected to the outlet of the pressure reducing valve under test.

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