Endurance test mechanism for hydrogenation gun and connecting device

Abstract

The utility model provides an endurance test mechanism for a hydrogenation gun and a connecting device. The endurance test mechanism is mainly composed of a servo electric cylinder telescopic device, a gun body supporting and rotating device and a servo motor rotating device. Wherein the gun body supporting and rotating device is used for clamping the hydrogenation gun and twisting an operating handle of the hydrogenation gun; a servo electric cylinder 5 is arranged on the servo electric cylinder telescopic device, and the telescopic end of the servo electric cylinder 5 is connected with a clamping device of the gun body supporting and rotating device. The servo motor rotating device is used for driving the hydrogen filling port to rotate by a certain angle after each circulation; according to the clamping device, the clamping range is widened, the clamping device is suitable for the outer diameters of handles of more hydrogenation guns, the telescopic range of the servo electric cylinder can be adjusted, meanwhile, semi-automatic control is completed according to the durability test requirements of GB / T 34425-2023 hydrogenation guns of fuel cell electric vehicles, operation is flexible, reliable and safer, and running is more stable and accurate.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen refueling gun experimental devices, and in particular to a durability testing mechanism for a hydrogen refueling gun and its connecting device. Background Technology

[0002] The hydrogen refueling gun is a core piece of equipment in a hydrogen refueling station for fuel cell electric vehicles (FCEVs). It is used to safely and efficiently inject high-pressure hydrogen into the vehicle's hydrogen storage system. With the rapid development of hydrogen fuel cell vehicles, the performance of the hydrogen refueling gun used to refuel hydrogen fuel cell vehicles is particularly important.

[0003] The national standard GB / T 34425-2023 "Hydrogen Refueling Gun for Fuel Cell Electric Vehicles" clearly specifies the test methods and experimental requirements for hydrogen refueling guns for fuel cell electric vehicles, including the durability test of the hydrogen refueling gun and connection device. The test aims to verify the reliability of the hydrogen refueling gun under conditions such as repeated insertion and removal, high-pressure cycling, and extreme environments, and to ensure that its sealing performance, mechanical strength, and safety functions do not fail during its service life.

[0004] Currently, the experimental devices used to test the durability of hydrogen refueling guns and connecting devices have the following shortcomings. First, with the increase in the number and types of hydrogen fuel cell vehicles on the market, the types of hydrogen refueling guns have also increased, such as hydrogen refueling guns for small cars (sedans), buses, and trucks. Existing durability testing devices cannot be easily adapted to different models and types of hydrogen refueling guns, thus limiting their applicability. Second, the existing durability testing devices have a low degree of automation. During the durability test, the experimenter often needs to manually operate the hydrogen refueling gun handle and manually rotate the hydrogen refueling port to complete each cycle, which is cumbersome and has low safety.

[0005] For the reasons mentioned above, in response to the durability test requirements of the national standard GB / T 34425-2023 "Hydrogen Refueling Gun for Fuel Cell Electric Vehicles", it is necessary to propose a durability test mechanism for hydrogen refueling guns and connection devices that has a wider range of applications and a higher degree of automation. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this utility model proposes a durability testing mechanism for hydrogen refueling guns and connecting devices, aiming to solve the problems of limited applicability and cumbersome manual operation of existing durability testing mechanisms for hydrogen refueling guns and connecting devices.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A durability testing mechanism for a hydrogen refueling gun and its connecting device includes a tooling base plate. A servo cylinder telescopic device, a gun body support rotation device, and a servo motor rotation device are movably mounted on a slide rail of the tooling base plate. The gun body support rotation device includes a clamping device for holding the hydrogen refueling gun and a rotation device for twisting the hydrogen refueling gun's operating handle. The servo cylinder telescopic device is located near the hydrogen refueling gun's inlet end and has a servo cylinder mounted on it; the telescopic end of the servo cylinder is connected to the clamping device. The servo motor rotation device is located near the hydrogen refueling gun's outlet end and has a three-jaw chuck for fixing the hydrogen refueling port; a servo motor is connected to the three-jaw chuck.

[0009] Preferably, the gun body supports a rotating cylinder support frame, which is slidably mounted on a slide rail on the tooling base plate. The rotating cylinder is adjustablely mounted on the rotating cylinder support frame by a star-shaped locking screw. The output shaft of the rotating cylinder is connected to a rotating cylinder connecting plate, which is connected to the operating handle of the hydrogen refueling gun via a hydrogen refueling gun handle connecting block at its lower part.

[0010] Preferably, the gun body support rotation device further includes a height-adjustable gun body support frame, the lower end of which is connected to a rotary cylinder support frame, and the upper end of which is connected to a hydrogen refueling gun.

[0011] Preferably, the clamping device includes an upper clamping device and a lower clamping device on the gun handle, with the hydrogen refueling gun fixed between the upper clamping device and the lower clamping device. The length of the lower clamping device is greater than the length of the upper clamping device, and one end of the lower clamping device is connected to the telescopic end of the servo electric cylinder.

[0012] Preferably, the servo electric cylinder telescopic device includes an electric cylinder support frame, which is slidably mounted on a slide rail on the tooling base plate. A first locking handle is provided between the electric cylinder support frame and the slide rail, and the servo electric cylinder is fixedly mounted on the electric cylinder support frame.

[0013] Preferably, a tension / compression sensor is connected between the telescopic end of the servo electric cylinder and the clamping device.

[0014] Preferably, the servo motor rotating device includes a chuck connecting seat, which is slidably mounted on the slide rail of the tooling base plate. A second locking handle is provided between the chuck connecting seat and the slide rail, and a three-jaw chuck is rotatably mounted on the chuck connecting seat.

[0015] Beneficial effects: Compared with the prior art, the present invention has at least the following technical effects:

[0016] 1. This utility model features a rotary cylinder that automatically twists the operating handle of the hydrogen refueling nozzle. After each cycle, the three-jaw chuck rotates the hydrogen refueling port by a certain angle. Based on the durability test requirements of GB / T 34425-2023 "Hydrogen Refueling Nozzle for Fuel Cell Electric Vehicles", it provides a solution for semi-automatic control, which is flexible, reliable, safer, and more stable and precise in operation.

[0017] 2. This utility model's clamping device increases the clamping range, making it suitable for a wider range of hydrogen refueling gun handle outer diameters. The servo electric cylinder's adjustable extension range accommodates hydrogen refueling gun bodies of different lengths (it is compatible with both 35MPa and 70MPa specifications). The servo-controlled clamp extension speed is precise and stable, making the mechanism more reliable and safer during testing, thus adapting to a wider range of hydrogen refueling gun specifications. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the hydrogen gun and connecting device durability testing mechanism of this utility model;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0020] The image is labeled as follows:

[0021] Ⅰ. Servo electric cylinder telescopic device; Ⅱ. Gun body support rotation device; Ⅲ. Servo motor rotation device; 1. Tooling base plate; 2. Slide rail; 3. Electric cylinder support frame; 4. First locking handle; 5. Servo electric cylinder; 6. Tension / compression sensor; 7. Upper clamping device on the gun handle; 8. Lower clamping device on the gun handle; 9. Hydrogen refueling gun; 10. Torch lock screw; 11. Rotary cylinder connecting plate; 12. Hydrogen refueling gun handle connecting block; 13. Rotary cylinder; 14. Hydrogen refueling port; 15. Three-jaw chuck; 16. Chuck connecting seat; 17. Second locking handle; 18. Servo motor; 19. Gun body support frame; 20. Rotary cylinder support frame. Detailed Implementation

[0022] 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.

[0023] The meanings of the terms "hydrogen refueling gun", "hydrogen refueling port", "circulation", and "connection device" in this article are in accordance with the definitions and explanations of the relevant terms in GB / T34425-2023 "Hydrogen Refueling Gun for Fuel Cell Electric Vehicles".

[0024] like Figure 1 As shown, the durability testing mechanism for the hydrogen refueling gun and its connecting device mainly consists of three parts: a servo cylinder telescopic device I, a gun body support rotation device II, and a servo motor rotation device III, all mounted on the slide rail 2 of the tooling base plate 1. The gun body support rotation device II is used to clamp the hydrogen refueling gun 9 and to rotate the operating handle of the hydrogen refueling gun 9. The servo cylinder telescopic device I is located near the inlet end of the hydrogen refueling gun 9 and has a servo cylinder 5 mounted on it. The telescopic end of the servo cylinder 5 is connected to the clamping device of the gun body support rotation device II. The servo motor rotation device III is located near the outlet end of the hydrogen refueling gun 9 and has a three-jaw chuck 15 that fixes the hydrogen refueling port 14. A servo motor 18 is connected to the three-jaw chuck 15, which rotates the hydrogen refueling port by a certain angle after each cycle. [GB / T 34425-2023 "Hydrogen Refueling Gun for Fuel Cell Electric Vehicles" states in section 6.8 Durability: When disconnected, the test equipment rotates the hydrogen refueling gun randomly or in a certain angle increment pattern.]

[0025] Specifically, the servo cylinder telescopic device I includes a cylinder support frame 3, which is slidably mounted on the slide rail 2 of the tooling base plate 1. A first locking handle 4 is provided between the cylinder support frame 3 and the slide rail 2. The servo cylinder 5 is fixedly mounted on the cylinder support frame 3. A tension / compression sensor 6 is connected between the telescopic end of the servo cylinder 5 and the clamping device of the gun body support rotation device II.

[0026] The gun body support rotation device II includes a rotary cylinder support frame 20, which is slidably mounted on the slide rail 2 of the tooling base plate 1. The rotary cylinder 13 is adjustablely mounted on the rotary cylinder support frame 20 by a Torch Locking Screw. The output shaft of the rotary cylinder 13 is connected to a rotary cylinder connecting plate 11, which is connected to the operating handle of the hydrogen refueling gun 9 via a hydrogen refueling gun handle connecting block 12 at its lower part. The gun body support rotation device II also includes a height-adjustable gun body support frame 19, the lower end of which is connected to the rotary cylinder support frame 20, and the upper end of which is connected to the hydrogen refueling gun 9.

[0027] The clamping device on the gun body support rotation device II includes an upper clamping device 7 and a lower clamping device 8. The hydrogen refueling gun 9 is fixed between the upper clamping device 7 and the lower clamping device 8. The length of the lower clamping device 8 is greater than the length of the upper clamping device 7 and one end is connected to the telescopic end of the servo electric cylinder 5.

[0028] The servo motor rotation device III includes a chuck connecting seat 16, which is slidably mounted on the slide rail 2 of the tooling base plate 1. A second locking handle 17 is provided between the chuck connecting seat 16 and the slide rail 2. A three-jaw chuck 15 is rotatably mounted on the chuck connecting seat 16.

[0029] First, place the hydrogen refueling gun 9 (test specimen) in the clamping device 8 under the gun handle. Then, tighten the clamping device 7 on the gun handle with screws. After fixing the hydrogen refueling gun 9 (test specimen), fix the gun body support frame 19 at the outlet end of the hydrogen refueling gun 9 (test specimen). Adjust the gun body support frame 19 to the corresponding height according to the height of the test specimen from the upper surface of the tooling base plate 1 to fix the gun body. Then, position the rotary cylinder connecting plate 11, the hydrogen refueling gun handle connecting block 12, and the rotary cylinder 13 on the operating handle of the hydrogen refueling gun 9 (test specimen). After positioning, tighten the rotary cylinder 13 with the Torx locking screw 10. During the test, the rotary cylinder can be used to replace manual operation to control the operating handle of the hydrogen refueling gun 9 (test specimen) each time.

[0030] After the corresponding hydrogen filling port 14 is installed on the three-jaw chuck 15, the three-jaw chuck 15 can automatically align itself to ensure that the hydrogen filling port 14 is concentric with the three-jaw chuck 15.

[0031] After installing the hydrogen refueling gun 9 (sample) and the hydrogen refueling port 14, use the guide rail 2 to adjust the position of the left hydrogen refueling gun 9 (sample) to about 20-30mm away from the hydrogen refueling port 14. First, use the locking handle 4 to lock it, so that the hydrogen refueling gun 9 (sample) is fixed in the current position.

[0032] Similarly, use the second locking handle 17 to lock, so that the hydrogen filling port 14 is fixed in the current position.

[0033] The system automatically performs the GB / T 34425-2023 test by inputting parameters through the operating software. The test process is as follows: the left servo cylinder 5 automatically pushes the hydrogen refueling gun 9 (test piece) into the hydrogen refueling port 14. After the system determines that the connection is valid through the tension and pressure sensor 6, the rotary cylinder 13 twists the operating handle of the hydrogen refueling gun 9 (test piece) to lock the hydrogen refueling gun 9 (test piece) and the hydrogen refueling port 14. A pressure test is then performed. The pressure reaches the maximum working pressure of the hydrogen refueling gun 9 (test piece). After that, the connection device is depressurized. After the pressure is depressurized, the servo cylinder 5 returns the connected hydrogen refueling gun 9 (test piece) to the initial position and disconnects the connection with the hydrogen refueling port 14. The right three-jaw chuck 15 drives the hydrogen refueling port 14 to rotate a certain angle (the angle can be set). Then the next cycle is performed until the set number of test times is reached, and the test is completed.

Claims

1. A durability testing mechanism for a hydrogen refueling gun and its connecting device, characterized in that, The fixture includes a base plate (1), on which a servo electric cylinder telescopic device (Ⅰ), a gun body support rotation device (Ⅱ) and a servo motor rotation device (Ⅲ) are movably mounted on a slide rail (2); the gun body support rotation device (Ⅱ) includes a clamping device for clamping the hydrogen refueling gun (9) and a rotation device for twisting the operating handle of the hydrogen refueling gun (9); the servo electric cylinder telescopic device (Ⅰ) is located on the side near the inlet end of the hydrogen refueling gun (9), and a servo electric cylinder (5) is provided on it, with the telescopic end of the servo electric cylinder (5) connected to the clamping device; the servo motor rotation device (Ⅲ) is located on the side near the outlet end of the hydrogen refueling gun (9), and a three-jaw chuck (15) for fixing the hydrogen refueling port (14) is provided on it, with a servo motor (18) connected to the three-jaw chuck (15).

2. The durability testing mechanism for the hydrogenation gun and connecting device according to claim 1, characterized in that, The gun body support rotation device (II) includes a rotary cylinder support frame (20), which is slidably mounted on the slide rail (2) of the tooling base plate (1). The rotary cylinder (13) is adjustablely mounted on the rotary cylinder support frame (20) by a plum-shaped locking screw (10). The output shaft of the rotary cylinder (13) is connected to a rotary cylinder connecting plate (11), which is connected to the operating handle of the hydrogen refueling gun (9) through a hydrogen refueling gun handle connecting block (12).

3. The durability testing mechanism for the hydrogenation gun and connecting device according to claim 2, characterized in that, The gun body support rotation device (II) also includes a height-adjustable gun body support frame (19), the lower end of which is connected to the rotary cylinder support frame (20), and the upper end of which is connected to the hydrogen refueling gun (9).

4. The durability testing mechanism for the hydrogenation gun and connecting device according to claim 1, characterized in that, The clamping device includes an upper clamping device (7) and a lower clamping device (8) on the gun handle. The hydrogen refueling gun (9) is fixed between the upper clamping device (7) and the lower clamping device (8). The length of the lower clamping device (8) is greater than the length of the upper clamping device (7) and one end is connected to the telescopic end of the servo electric cylinder (5).

5. The durability testing mechanism for the hydrogenation gun and connecting device according to claim 1, characterized in that, The servo electric cylinder telescopic device (I) includes an electric cylinder support frame (3), which is slidably mounted on the slide rail (2) of the tooling base plate (1). A first locking handle (4) is provided between the electric cylinder support frame (3) and the slide rail (2). The servo electric cylinder (5) is fixedly mounted on the electric cylinder support frame (3).

6. The durability testing mechanism for the hydrogenation gun and connecting device according to claim 1, characterized in that, A tension / compression sensor (6) is connected between the telescopic end of the servo electric cylinder (5) and the clamping device.

7. The durability testing mechanism for the hydrogenation gun and connecting device according to claim 1, characterized in that, The servo motor rotating device (Ⅲ) includes a chuck connecting seat (16), which is slidably mounted on the slide rail (2) of the tooling base plate (1). A second locking handle (17) is provided between the chuck connecting seat (16) and the slide rail (2), and a three-jaw chuck (15) is rotatably mounted on the chuck connecting seat (16).

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