Hydrogenation gun abnormal load test device

Abstract

The utility model provides a hydrogenation gun abnormal load test device which comprises a door-openable test box body, a touch screen electric control system is arranged on the door-openable test box body, and an axial load mechanism, an angle load mechanism, an installation valve block, a gas supply pipeline system and a test piece fixing mechanism are installed in the door-openable test box body. A test piece hydrogenation port is fixed on the mounting valve block, a hydrogenation gun test piece is mounted on the test piece fixing mechanism, one end of the mounting valve block is connected with the axial load mechanism, the tail end of a gun handle of the hydrogenation gun test piece is connected with the angle load mechanism, and the high-pressure gas supply pipeline is pneumatically connected with the mounting valve block. The device is designed strictly according to the experimental requirements of GB / T 34425-2023 Fuel Cell Electric Vehicle Hydrogenation Gun, the load applying mode is matched with the new national standard experimental requirements, the whole flow of the GB / T 34425-2023 Fuel Cell Electric Vehicle Hydrogenation Gun abnormal load test can be automatically completed, the man-made interference is reduced, and the detection quality and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen refueling gun experimental devices, and in particular to a hydrogen refueling gun abnormal load test device. Background Technology

[0002] When using a hydrogen refueling nozzle, it may be subjected to unexpected external forces, such as being pulled or pulled by a moving vehicle. Therefore, it is necessary to evaluate the structural strength and sealing performance of the hydrogen refueling nozzle under unexpected external forces through constant load testing.

[0003] Current hydrogen refueling gun abnormal load testing equipment has the following main problems when conducting abnormal load tests: First, during the application of loads, including longitudinal axis loads and gun handle end torque loads, manual operation is often used to apply and control these two types of loads, resulting in a lot of human interference and low test quality and efficiency. Second, the hydrogen refueling guns used as test specimens are of different types (mainly straight guns and angled guns), and existing testing equipment cannot simultaneously meet the testing requirements for both straight guns and angled guns. In addition, existing testing devices usually do not integrate the load device and the pressurized gas circuit, requiring an additional connection to the pressurized gas circuit for pressurized tests, making it inconvenient to complete pressurized or unpressurized tests in one go.

[0004] For the reasons mentioned above, it is necessary to propose a hydrogenation gun abnormal load test device that is easy to apply and control the load, and can simultaneously meet the requirements of both straight gun and angled gun with or without pressure testing. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model proposes an abnormal load testing device for hydrogen refueling guns, aiming to solve the problems that existing hydrogen refueling guns mostly rely on manual operation, are not easy to adapt to different models of hydrogen refueling guns, and cannot meet the abnormal load testing requirements under pressure or without pressure.

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

[0007] A hydrogen refueling gun abnormal load testing device includes an openable test chamber with a touch screen control system. The openable test chamber houses an axial load mechanism, an angular load mechanism, a mounting valve block, a gas supply pipeline system, and a specimen fixing mechanism. The mounting valve block is slidably installed inside the openable test chamber, and a hydrogen refueling port is fixed to the mounting valve block. A hydrogen refueling gun specimen is mounted on the specimen fixing mechanism. The hydrogen refueling port is connected and conductive to the hydrogen refueling gun specimen. The end of the mounting valve block furthest from the hydrogen refueling gun specimen is connected to the axial load mechanism. The end of the hydrogen refueling gun specimen handle is connected to the angular load mechanism. The gas supply pipeline system includes a high-pressure gas supply pipeline and a low-pressure gas supply pipeline. The high-pressure gas supply pipeline is pneumatically connected to the mounting valve block, and the low-pressure gas supply pipeline is pneumatically connected to the axial load mechanism and the angular load mechanism. The touch screen control system is electrically connected to the axial load mechanism, the angular load mechanism, and the gas supply pipeline system.

[0008] Preferably, the mounting valve block is slidably mounted on the mounting base plate inside the openable test chamber via the first slide rail slider group. A pressure sensor is provided at the connection between the mounting valve block and the high-pressure gas supply pipeline, and a high-pressure exhaust connector is provided at the top.

[0009] Preferably, the mounting valve block is connected to the high-pressure gas supply pipeline and the hydrogen filling port 206 by high-pressure sealing copper gaskets and high-pressure O-rings, respectively.

[0010] Preferably, the axial load mechanism includes a first push-pull cylinder with adjustable stroke. The first push-pull cylinder is fixedly installed on the mounting base plate inside the openable test chamber. Its telescopic end is connected to a first tension / compression sensor through a first floating joint. The first tension / compression sensor is connected to the mounting valve block.

[0011] Preferably, the angle load mechanism includes a stroke-adjustable second push-pull cylinder, a cylinder rotating plate, and a second slide rail slider assembly. The second push-pull cylinder is rotatably mounted on the second slide rail slider assembly via the cylinder rotating plate. The second slide rail slider assembly is mounted on the mounting base plate. A set of limit bolts is provided between the cylinder rotating plate and the slider of the second slide rail slider assembly. The telescopic end of the second push-pull cylinder is connected to a second tension / compression sensor via a second floating joint. The second tension / compression sensor is connected to the end of the hydrogenation gun specimen handle via a connecting push rod and a specimen connecting block. A displacement sensor is connected to the second slide rail slider assembly.

[0012] Preferably, the specimen connecting block has two forms: when the hydrogenation gun specimen is a straight gun, the specimen connecting block is a straight gun specimen connecting block; when the hydrogenation gun specimen is an angled gun, the specimen connecting block is an angled gun specimen connecting block.

[0013] Preferably, the low-pressure gas supply pipeline includes a through-plate connector fixed on the mounting base plate. The inlet end of the through-plate connector is connected to a low-pressure gas source, and the outlet end is sequentially connected to a low-pressure end straight connector, a triplet, an oil mist separator, and a gas pipe tee. The two outlet ends of the gas pipe tee are respectively connected to an axial load mechanism and an angular load mechanism through a silencer, an electric proportional valve, a reversing valve, and a speed regulating valve. An electric contact pressure gauge is connected to the triplet.

[0014] The high-pressure gas supply pipeline includes a high-pressure pipeline through plate fixed on the mounting base plate. The inlet end of the high-pressure pipeline through plate is connected to a high-pressure gas source, and the outlet end is connected to the mounting valve block in sequence through a high-pressure tee, a high-pressure needle valve, and a safety valve. An electric contact pressure switch is connected to the high-pressure tee, and a manual needle valve is connected to the mounting valve block through a threaded connector.

[0015] Preferably, the door of the openable test chamber is a gas-supported structure, and the openable test chamber is provided with an explosion vent.

[0016] Beneficial effects: Compared with the prior art, the present invention has at least the following technical effects:

[0017] 1. This utility model applies two loads (axial and lateral torque) simultaneously through pneumatic control, reducing human interference and improving testing quality and efficiency. It is designed strictly in accordance with the experimental requirements of GB / T 34425-2023 "Hydrogen Refueling Gun for Fuel Cell Electric Vehicles". The load application method is consistent with the new national standard experimental requirements. It can automatically complete the entire process of abnormal load test of GB / T 34425-2023 "Hydrogen Refueling Gun for Fuel Cell Electric Vehicles", reducing human interference and improving testing quality and efficiency.

[0018] 2. The angle load mechanism of this utility model for applying torque load to the end of the hydrogenation gun can adjust the torque angle to meet the requirements of different models of hydrogenation guns such as straight guns and angle guns.

[0019] 3. This utility model is equipped with independent high-pressure air circuit and low-pressure air circuit, which can simultaneously meet the abnormal load test with or without pressure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structural components of this utility model (example of a straight gun specimen).

[0021] Figure 2 This is a schematic diagram of the axial load mechanism of this utility model (straight gun specimen example).

[0022] Figure 3 This is a schematic diagram of the angle load mechanism of this utility model (example of an angle gun specimen).

[0023] Figure 4 This is a schematic diagram of the system principle of this utility model.

[0024] The image is labeled as follows:

[0025] 1. Touch screen electronic control system; 2. Door-openable test chamber; 3. Axial load mechanism; 4. Angular load mechanism; 5. Air supply pipeline system;

[0026] 201. Mounting base plate; 202. High-pressure exhaust connector; 203. Mounting valve block; 204. Pressure sensor; 205. High-pressure sealing copper gasket; 206. Specimen hydrogenation port; 207. High-pressure O-ring; 208. Specimen locking block; 209. Hydrogenation gun specimen; 210. Specimen fixing bracket; 211. Slide rail stop block; 212. First slide rail slider assembly;

[0027] 300. First push-pull cylinder; 301. First floating joint; 302. First tension / compression sensor; 303. Fixing bolt assembly;

[0028] 400. Second push-pull cylinder; 401. Cylinder rotating plate; 402. Rotary bearing; 403. Slide rail fixing seat; 404. Second slide rail slider assembly; 405. Second floating joint; 406. Second tension / compression sensor; 407. Connecting push rod; 408. Angle gun specimen connecting block; 409. Straight gun specimen connecting block; 410. Limit bolt assembly; 411. Displacement sensor;

[0029] 500. Through-plate connector; 501. Low-pressure end straight-through; 502. Triple unit; 503. Electrical contact pressure gauge; 504. Oil mist separator; 505. Silencer; 506. Electro-proportional valve; 507. Air tee; 508. Reversing valve; 509. Speed ​​control valve; 514. High-pressure pipeline through-plate; 515. High-pressure needle valve; 516. High-pressure end straight-through; 517. High-pressure tee; 518. Safety valve; 519. Threaded connector; 520. Manual needle valve; 521. Direct-acting solenoid valve; 522. Second threaded connector; 523. Electrical contact pressure switch. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figure 1As shown, this utility model proposes a hydrogen refueling gun abnormal load test device, including an openable test chamber 2. The openable test chamber 2 is equipped with a touch screen electrical control system 1. The touch screen electrical control system 1 adopts an industrial touch screen electrical control system, which has a high degree of automation. The touch screen electrical control system 1 is electrically connected to the axial load mechanism 3, the angular load mechanism 4 and the gas pipeline system 5, providing the test device with electrical component placement, human-machine interface and operating space. The openable test chamber 2 is an industrial design sheet metal shell. The test chamber door is designed with gas support and has an explosion vent inside to ensure convenient and reliable testing and provide test space for the test specimen.

[0032] The test chamber 2 with an openable door is equipped with an axial load mechanism 3, an angle load mechanism 4, a mounting valve block 203, an air supply pipeline system 5, and a specimen fixing mechanism.

[0033] Among them, the axial load mechanism 3 is used to apply the longitudinal axis load to the hydrogen refueling gun or hydrogen refueling port, and the angular load mechanism 4 is used to apply torque to the end of the hydrogen refueling gun. The above settings comply with the experimental requirements of 6.6 Abnormal Load in GB / T 34425-2023 "Hydrogen Refueling Gun for Fuel Cell Electric Vehicles".

[0034] Specifically, the mounting valve block 203 is slidably installed inside the openable test chamber 2. A hydrogen inlet 206 is fixed to the mounting valve block 203. A hydrogen gun specimen 209 is mounted on the specimen fixing mechanism. The hydrogen inlet 206 is connected and conductive to the hydrogen gun specimen 209. The end of the mounting valve block 203 away from the hydrogen gun specimen 209 is connected to the axial load mechanism 3. The end of the hydrogen gun specimen 209 handle is connected to the angle load mechanism 4. The gas supply system 5 includes a high-pressure gas supply line and a low-pressure gas supply line. The high-pressure gas supply line is pneumatically connected to the mounting valve block 203, and the low-pressure gas supply line is pneumatically connected to both the axial load mechanism 3 and the angle load mechanism 4. The high-pressure gas source and the low-pressure gas source are separate, enabling both pressurized (maximum pressure 70 MPa) and unpressurized testing. Figure 2 As shown, the specimen fixing mechanism includes a specimen locking block 208 and a specimen fixing bracket 210, which serve to support and fix the hydrogenation gun specimen 209.

[0035] Furthermore, the mounting valve block 203 is slidably mounted on the mounting base plate 201 inside the openable test chamber 2 via the first slide rail slider group 212. A pressure sensor 204 is provided at the connection between the mounting valve block 203 and the high-pressure gas supply pipeline, and a high-pressure exhaust connector 202 is provided at the top. The mounting valve block 203 is sealed to the high-pressure gas supply pipeline and the hydrogen filling port 206 respectively through a high-pressure sealing copper gasket 205 and a high-pressure O-ring 207. Specifically, the high-pressure gas inlet and exhaust parts of the mounting valve block 203 are sealed to the high-pressure gas supply pipeline; the other end is sealed to the pressure sensor 204 through a high-pressure sealing copper gasket; the test end is sealed to the hydrogen filling port 206 of the test specimen through a high-pressure O-ring, and the hydrogen filling port 206 of the test specimen and the hydrogen filling gun test specimen 209 are connected by a high-pressure quick-connect connection.

[0036] Furthermore, such as Figure 2 As shown, the axial load mechanism 3 includes a first push-pull cylinder 300 with adjustable stroke. The first push-pull cylinder 300 is fixedly installed on the mounting base plate 201 inside the openable test chamber 2. Its telescopic end is connected to a first tension / compression sensor 302 through a first floating joint 301. The first tension / compression sensor 302 is connected to the mounting valve block 203. The first slide rail slider assembly 212 is provided with a slide rail stop 211, which serves to fix the displacement stroke. The slider of the slide rail slider assembly 212 is fixedly connected to the mounting valve block 203 through a fixing bolt assembly 303.

[0037] The first push-pull cylinder 300 provides the test load power, the first tension and pressure sensor 302 tests the tension and pressure magnitude, the first push-pull cylinder 300 and the floating joint 301 are fixed by threaded connection; the floating joint 301 and the first tension and pressure sensor 302 are also fixed by threaded connection; the first tension and pressure sensor 302 and the mounting valve block 203 are fixed by bolts, and the 0.1% high-precision selection is adopted to ensure the test accuracy.

[0038] Furthermore, the angle load mechanism 4 includes a stroke-adjustable second push-pull cylinder 400, a cylinder rotating plate 401, and a second slide rail slider assembly 404. The second push-pull cylinder 400 is rotatably mounted on the second slide rail slider assembly 404 via the cylinder rotating plate 401. The second slide rail slider assembly 404 is mounted on the mounting base plate 201. A limit bolt assembly 410 is provided between the cylinder rotating plate 401 and the slider of the second slide rail slider assembly 404. The telescopic end of the second push-pull cylinder 400 is connected to a second tension / compression sensor 406 via a second floating joint 405. The second tension / compression sensor 406 is connected to the end of the handle of the hydrogenation gun specimen 209 via a connecting push rod 407 and a specimen connecting block. A displacement sensor 411 is connected to the second slide rail slider assembly 404.

[0039] Specifically, such as Figure 3As shown, the second push-pull cylinder 400 provides the test load power. The second push-pull cylinder 400 is fixed to the cylinder rotating plate 401 by bolts. The cylinder rotating plate 401 is rotatably connected to the slider of the second slide rail slider group 404 through the rotating bearing 402. The cylinder rotating plate 401 has an angle groove, and a limit bolt group 410 is provided in the angle groove to realize angle positioning, so as to match the straight gun specimen and the angle strong specimen. The slider of the second slide rail slider group 404 can be limited to the slide rail through the slide rail fixing seat 403. The second push-pull cylinder 400 is fixed to the second floating joint 405 by threaded connection. The second floating joint 405 is also fixed to the second tension and pressure sensor 406 by threaded connection. The second tension and pressure sensor 406 is connected to the connecting push rod 407 by thread. The displacement sensor 411 is fixed on the mounting base plate 201. The slider of the second slide rail slider group 404 at the telescopic end is connected to the second tension and pressure sensor 406 with a high precision of 0.1%, which ensures the test accuracy.

[0040] Furthermore, the specimen connection block comes in two forms, and the two tooling options are interchangeable depending on the type of hydrogenation gun specimen, such as... Figure 1 As shown, when the hydrogenation gun specimen 209 is a straight gun, the specimen connecting block is the straight gun specimen connecting block 409; as Figure 3 As shown, when the hydrogenation gun specimen 209 is an angle gun, the specimen connecting block is the angle gun specimen connecting block 408.

[0041] Furthermore, such as Figure 4 As shown, the low-pressure gas supply pipeline includes a through-plate connector 500 fixed on the mounting base plate 201. The inlet end of the through-plate connector 500 is connected to the low-pressure gas source, and the outlet end is sequentially connected to a low-pressure end straight connector 501, a triplet 502, an oil mist separator 504, and a gas pipe tee 507. The two outlet ends of the gas pipe tee 507 are respectively connected to the first push-pull cylinder 300 and the second push-pull cylinder 300 through a silencer 505, an electro-proportional valve 406, a reversing valve 508, and a speed regulating valve 509. The electro-proportional valve 406 controls the intake pressure. An electric contact pressure gauge 503 is connected to the triplet 502. All components are connected by 10mm gas pipes and threads to provide gas power to the system.

[0042] The components of the high-pressure gas supply pipe are connected by high-pressure hoses and 1 / 4" reverse-threaded tubing to improve the pressure resistance and load testing of the high-pressure pipeline of the system. This includes a high-pressure pipeline through-plate 514 fixed on the mounting base plate 201. The inlet end of the high-pressure pipeline through-plate 514 is connected to the high-pressure gas source, and the outlet end is connected to the mounting valve block 203 in sequence through a high-pressure tee 517, a high-pressure needle valve 515, and a safety valve 518. An electrical contact pressure switch 523 is connected to the high-pressure tee 517, and a manual needle valve 520 is connected to the mounting valve block 203 through a threaded connector 519 for maintaining pressure during the experiment.

[0043] This invention can perform tests on various test specimens, including straight guns and angled guns, for hydrogenation guns; it can complete pressurized and unpressurized sealing tests and abnormal load tests on test specimens; the testing system is resistant to high pressure; it has safety protection, the pressurization process is reliable, and it uses high-precision sensors to improve the accuracy, versatility, and specialization of the testing system.

Claims

1. A hydrogenation gun abnormal load test device, characterized in that, The test chamber includes an openable test chamber (2), which is equipped with a touch screen electronic control system (1). Inside the openable test chamber (2) are installed an axial load mechanism (3), an angular load mechanism (4), a mounting valve block (203), a gas supply pipeline system (5), and a specimen fixing mechanism. The mounting valve block (203) is slidably installed inside the openable test chamber (2). A hydrogen filling port (206) for the specimen is fixed on the mounting valve block (203). A hydrogen filling gun specimen (209) is installed on the specimen fixing mechanism. The hydrogen filling port (206) is connected to the hydrogen filling gun specimen (209). And conduction, the end of the mounting valve block (203) away from the hydrogen gun test piece (209) is connected to the axial load mechanism (3), the end of the handle of the hydrogen gun test piece (209) is connected to the angle load mechanism (4), the gas supply pipeline system (5) includes a high-pressure gas supply pipeline and a low-pressure gas supply pipeline, the high-pressure gas supply pipeline is pneumatically connected to the mounting valve block (203), the low-pressure gas supply pipeline is pneumatically connected to the axial load mechanism (3) and the angle load mechanism (4), and the touch screen electronic control system (1) is electrically connected to the axial load mechanism (3), the angle load mechanism (4) and the gas supply pipeline system (5).

2. The hydrogenation gun abnormal load test device according to claim 1, characterized in that, The mounting valve block (203) is slidably mounted on the mounting base plate (201) inside the openable test box (2) via the first slide rail slider group (212). A pressure sensor (204) is provided at the connection between the mounting valve block (203) and the high-pressure gas supply pipeline, and a high-pressure exhaust connector (202) is provided on the top.

3. The hydrogenation gun abnormal load test device according to claim 2, characterized in that, The mounting valve block (203) is sealed to the high-pressure gas supply pipeline and the hydrogen filling port (206) respectively through a high-pressure sealing copper gasket (205) and a high-pressure O-ring (207).

4. The hydrogenation gun abnormal load test apparatus according to claim 1, characterized in that, The axial load mechanism (3) includes a first push-pull cylinder (300) with adjustable stroke. The first push-pull cylinder (300) is fixedly installed on the mounting base plate (201) inside the openable test box (2). Its telescopic end is connected to a first tension and pressure sensor (302) through a first floating joint (301). The first tension and pressure sensor (302) is connected to the mounting valve block (203).

5. The hydrogenation gun abnormal load test apparatus according to claim 1, characterized in that, The angle load mechanism (4) includes a second push-pull cylinder (400) with adjustable stroke, a cylinder rotating plate (401) and a second slide rail slider group (404). The second push-pull cylinder (400) is rotatably mounted on the second slide rail slider group (404) via the cylinder rotating plate (401). The second slide rail slider group (404) is mounted on the mounting base plate (201). A limit bolt group (410) is provided between the cylinder rotating plate (401) and the slider of the second slide rail slider group (404). The extension end of the second push-pull cylinder (400) is connected to a second tension and pressure sensor (406) via a second floating joint (405). The second tension and pressure sensor (406) is connected to the end of the gun handle of the hydrogenation gun specimen (209) via a connecting push rod (407) and a specimen connecting block. A displacement sensor (411) is connected to the second slide rail slider group (404).

6. The hydrogenation gun abnormal load test apparatus according to claim 5, characterized in that, The specimen connection block has two forms: when the hydrogenation gun specimen (209) is a straight gun, the specimen connection block is a straight gun specimen connection block (409); when the hydrogenation gun specimen (209) is an angled gun, the specimen connection block is an angled gun specimen connection block (408).

7. The hydrogenation gun abnormal load test apparatus according to claim 1, characterized in that, The low-pressure gas supply pipeline includes a through-plate connector (500) fixed on the mounting base plate (201). The inlet end of the through-plate connector (500) is connected to a low-pressure gas source, and the outlet end is sequentially connected to a low-pressure end straight connector (501), a triple unit (502), an oil mist separator (504), and a gas pipe tee (507). The two outlet ends of the gas pipe tee (507) are respectively connected to the axial load mechanism (3) and the angle load mechanism (4) through a silencer (505), an electric proportional valve (506), a reversing valve (508), and a speed regulating valve (509). An electric contact pressure gauge (503) is connected to the triple unit (502). The high-pressure gas supply pipeline includes a high-pressure pipeline through plate (514) fixed on the mounting base plate (201). The inlet end of the high-pressure pipeline through plate (514) is connected to the high-pressure gas source, and the outlet end is connected to the mounting valve block (203) in sequence through the high-pressure tee (517), the high-pressure needle valve (515), and the safety valve (518). An electric contact pressure switch (523) is connected to the high-pressure tee (517), and a manual needle valve (520) is connected to the mounting valve block (203) through the threaded connector (519).

8. The hydrogenation gun abnormal load test apparatus according to claim 1, characterized in that, The door of the openable test chamber (2) is a gas-supported structure, and the openable test chamber (2) is provided with an explosion vent.

Images