Metrological verification equipment for automobile hydrogenation machine

Abstract

The utility model provides a metering and calibrating device for a hydrogen adding machine for an automobile, which comprises a detection box body provided with a fixed pipeline, and a detection module is arranged on the fixed pipeline; a first connecting position and a second connecting position which are connected with one end of the fixed pipeline are respectively arranged on the detection box body; the first connecting position is used for inserting the hydrogen adding machine; and the connecting air gun is connected with the other end of the fixed pipeline and is connected with a hydrogen filling port of the automobile. According to the metering and calibrating equipment of the hydrogen adding machine for the automobile, the second connecting position is connected with the shielding gas supply unit to clean air in a pipeline before the hydrogen adding machine is inserted, so that potential safety hazards caused by mixing of hydrogen and air are avoided, and the safety in the metering and calibrating process is improved; meanwhile, the clean air ensures the purity of gas components in the pipeline and prevents the air from interfering with hydrogen metering, so that the accuracy of metrological verification of the hydrogen adding machine is remarkably improved; the connecting air gun can be directly connected with a hydrogen filling port of an automobile without repeated disassembly.

Description

Technical Field

[0001] This utility model belongs to the technical field of on-site verification devices, specifically relating to a metering and verification device for a hydrogen refueling machine for automobiles. Background Technology

[0002] Hydrogen refueling machines are specialized devices for refueling hydrogen fuel cell vehicles, and their metering accuracy is directly related to fair trade and safety. Hydrogen refueling machine metrological verification equipment is mainly used to test and calibrate the metrological performance of hydrogen refueling machines to ensure they meet national metrological standards. Automotive hydrogen refueling machine testing typically refers to a method of verifying the metrological performance of a hydrogen refueling machine using a vehicle as the object being refueled. This involves connecting the hydrogen refueling nozzle interface of the on-site verification device to the high-pressure hydrogen storage cylinder of the vehicle, and connecting the cylinder interface to the hydrogen refueling nozzle of the machine, thus connecting the hydrogen refueling machine and the storage cylinder in series for testing.

[0003] In existing technologies, when testing and calibrating the metering performance of a hydrogen dispenser, the on-site verification device is not continuously connected to the dispenser. Before hydrogen is introduced into the verification device, air may remain in the pipeline, leading to a mixture of hydrogen and air, which compromises safety. Furthermore, the hydrogen dispensing nozzle of the on-site verification device is separate from the main unit. During testing, the nozzle needs to be reinstalled, but repeated disassembly and reassembly of the nozzle connection can result in improper installation and hydrogen leakage, posing a significant safety risk. Utility Model Content

[0004] This utility model provides a metrology verification device for a hydrogen refueling machine for automobiles, which aims to solve the problem of poor practicality of existing metrology verification devices due to high safety risks.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a metering and verification device for a hydrogen refueling machine for automobiles, comprising:

[0006] The detection chamber has a hollow accommodating cavity; a fixed pipeline is provided in the accommodating cavity; a detection module is installed on the fixed pipeline; the detection chamber is respectively provided with a first connection position and a second connection position connected to one end of the fixed pipeline; wherein the first connection position is used for the hydrogen refueling machine to be inserted.

[0007] Connect the air gun to the other end of the fixed pipeline for connection to the hydrogen refueling port of the vehicle;

[0008] Before the hydrogen refueling machine is connected to the first connection point, the air in the fixed pipeline and the connecting gas gun is purged by connecting the second connection point to the protective gas supply unit.

[0009] In one possible implementation, a three-way valve is provided at one end of the fixed pipeline, and the three-way valve is connected to the fixed pipeline, the first connection position and the second connection position respectively.

[0010] In one possible implementation, at least two connecting air guns are provided, and each connecting air gun includes:

[0011] A connecting tube is provided, with one end mounted on the detection chamber and connected to the fixed pipeline, and the other end extending out of the detection chamber.

[0012] A hydrogen connection gun is attached to the protruding end of the corresponding connection tube.

[0013] In one possible implementation, the outer wall of the detection chamber is provided with multiple hanging structures, each of which is configured to correspond one-to-one with each of the hydrogen connection guns, and the hanging structures are used for hanging the hydrogen connection guns.

[0014] In one possible implementation, each of the mounting structures is for mounting the corresponding hydrogen connection gun, and each mounting structure includes:

[0015] A dustproof chamber is fixed on the outer wall of the detection box, and the dustproof chamber has a dust cover for placing the nozzle of the corresponding hydrogen connection gun.

[0016] The U-shaped block is fixed on the dustproof chamber and located below the dustproof cover. It has a U-shaped groove for the corresponding hydrogen connection gun to be engaged. The U-shaped block has two protruding ends.

[0017] A limiting post is slidably disposed on one of the protruding ends of the U-shaped block along the protruding direction of the protruding end of the U-shaped block;

[0018] A spring is sleeved on the limiting post. One end of the spring is connected to the protruding end of the U-shaped block, and the other end of the spring is connected to the limiting post. The spring is used to make the limiting post always have a tendency to move toward the protruding end of the U-shaped block.

[0019] A limiting strip is rotatably connected at one end to the other protruding end of the U-shaped block and located at the opening of the U-shaped groove; the other end of the limiting strip is hung on the limiting post.

[0020] The hydrogen connection gun head is provided with a snap-fit ​​section that can be adapted to and snap-fit ​​with the U-shaped groove of the U-shaped block.

[0021] In one possible implementation, the detection box is provided with a handle for a person to hold.

[0022] In one possible implementation, the bottom of the detection box is provided with a plurality of wheels, each of which is used for sliding of the detection box.

[0023] In one possible implementation, the detection housing is provided with a first hydrogen inlet and a second hydrogen inlet that communicate with each of the connecting gas guns, and the first hydrogen inlet and the second hydrogen inlet together constitute the first connection position.

[0024] In one possible implementation, the detection box is provided with an inspection door for operators to perform maintenance.

[0025] In one possible implementation, the detection box is provided with a third connection position, which is connected to the fixed pipeline, and the third connection position is provided with a pressure relief port.

[0026] This implementation method, by setting up a detection box, fixed pipeline, detection module, first connection position, second connection position, and connecting gas gun, and by using the second connection position to connect to the protective gas supply unit before plugging in the hydrogen dispenser, purges the air in the pipeline, avoiding the safety hazards caused by the mixing of hydrogen and air, and improving the safety of the metrological verification process. At the same time, purging the air ensures the purity of the gas composition in the pipeline, avoiding interference from air with hydrogen measurement, thereby significantly improving the accuracy of the hydrogen dispenser metrological verification. The connecting gas gun can be connected to the hydrogen refueling port of the car without repeated disassembly, avoiding hydrogen leakage, and has good practicality. Attached Figure Description

[0027] Figure 1 A schematic diagram of the metering and verification equipment for a hydrogen refueling machine for automobiles provided in this embodiment of the utility model;

[0028] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0029] Figure 3 A schematic diagram of the rear structure of the automotive hydrogen refueling machine metering and verification equipment provided in this embodiment of the utility model;

[0030] Figure 4 A schematic diagram illustrating the working principle of the automotive hydrogen refueling machine metering and verification equipment provided in this embodiment of the utility model;

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Inspection chamber; 11. First connection position; 111. First hydrogen inlet; 112. Second hydrogen inlet; 12. Second connection position; 13. Hanging structure; 131. Dustproof chamber; 1311. Dustproof cover; 132. U-shaped block; 133. Limiting post; 134. Limiting strip; 14. Handle; 15. Wheels; 16. Inspection door; 17. Third connection position; 20. Connecting air gun; 21. Connecting air pipe; 22. Hydrogen connecting gun. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0034] It should be noted that the terms "length", "width", "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", and "tail" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. 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, or the internal communication between two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0037] Please refer to the following: Figures 1 to 4The present invention provides a metrological verification device for an automotive hydrogen refueling machine. The device includes a testing chamber 10 and a connecting gas gun 20. The testing chamber 10 has a hollow accommodating cavity. A fixed pipeline is installed in the accommodating cavity. A testing module is installed on the fixed pipeline. The testing chamber 10 has a first connection position 11 and a second connection position 12, which are respectively connected to one end of the fixed pipeline. The first connection position 11 is used for connecting the hydrogen refueling machine. The connecting gas gun 20 is connected to the other end of the fixed pipeline and is used to connect to the hydrogen refueling port of the vehicle.

[0038] Before the hydrogen refueling machine is connected to the first connection position 11, the air in the fixed pipeline and the connecting gas gun 20 is purged by connecting the second connection position 12 to the protective gas supply unit.

[0039] The automotive hydrogen refueling machine metering and verification equipment provided in this embodiment, compared with the prior art, improves the safety of the metering and verification process by setting up a detection box 10, fixed pipeline, detection module, first connection position 11, second connection position 12, and connecting gas gun 20. Before connecting the hydrogen refueling machine, the second connection position 12 is used to connect to the protective gas supply unit to purge the air in the pipeline, avoiding the safety hazards caused by the mixing of hydrogen and air. Simultaneously, purging the air ensures the purity of the gas composition in the pipeline, preventing air from interfering with hydrogen metering, thus significantly improving the accuracy of the hydrogen refueling machine metering and verification. The connecting gas gun 20 can be connected to the car's hydrogen refueling port without repeated disassembly, avoiding hydrogen leakage and demonstrating good practicality.

[0040] In some embodiments, the aforementioned fixed conduit can be adopted as follows: Figure 1 The structure shown. See also Figure 1 One end of the fixed pipeline is equipped with a three-way valve, which is connected to the fixed pipeline, the first connection position 11 and the second connection position 12 respectively.

[0041] A three-way valve is installed at one end of the fixed pipeline, which is connected to the fixed pipeline, the first connection position 11 and the second connection position 12 respectively. This allows the protective gas supply unit and the hydrogen dispenser to be flexibly connected and switched with the fixed pipeline through the three-way valve. This facilitates the operation of the equipment in two different working states: air purging and metering verification, and improves the ease of use and work efficiency of the equipment.

[0042] In some embodiments, the aforementioned connecting air gun 20 can be adopted as follows: Figure 1 , Figure 3 The structure shown. See also Figure 1 , Figure 3At least two connecting gas guns 20 are provided, each including a connecting gas tube 21 and a hydrogen connecting gun 22. One end of the connecting gas tube 21 is attached to the detection chamber 10 and connected to the fixed pipeline, while the other end extends out of the detection chamber 10. The hydrogen connecting gun 22 is connected to the corresponding extended end of the connecting gas tube 21.

[0043] At least two connecting gas guns 20 are provided, and each connecting gas gun 20 consists of a connecting gas pipe 21 and a hydrogen connecting gun 22. This configuration allows for simultaneous metrological verification of multiple automotive hydrogen refueling ports, greatly improving verification efficiency. The connecting gas pipe 21 connects the hydrogen connecting gun 22 to the fixed pipeline inside the testing chamber 10, ensuring the stability and sealing of hydrogen transmission.

[0044] In some embodiments, the detection chamber 10 may be adopted as follows: Figures 1 to 3 The structure shown. See also Figures 1 to 3 The outer wall of the detection chamber 10 is provided with multiple hanging structures 13, each hanging structure 13 is set in correspondence with each hydrogen connection gun 22, and the hanging structure 13 is used for hanging the hydrogen connection gun 22.

[0045] Multiple hanging structures 13 are installed on the outer wall of the testing chamber 10, which correspond one-to-one with the hydrogen connection gun 22, providing a dedicated storage location for the hydrogen connection gun 22. This avoids damage or loss caused by random placement of the hydrogen connection gun 22, and at the same time makes the overall layout of the equipment more organized, which is convenient for management and use.

[0046] In some embodiments, the mounting structure 13 described above can be adopted as follows: Figures 1 to 3 The structure shown. See also Figures 1 to 3 Each mounting structure 13 is for mounting the corresponding hydrogen connection gun 22. Each mounting structure 13 includes: a dustproof chamber 131, a U-shaped block 132, a limiting post 133, a spring, and a limiting strip 134. The dustproof chamber 131 is fixed to the outer wall of the detection box 10 and has a dust cover 1311 for placing the nozzle of the corresponding hydrogen connection gun 22. The U-shaped block 132 is fixed to the dustproof chamber 131 and located below the dust cover 1311. It has a U-shaped groove for the corresponding hydrogen connection gun 22 to be engaged and has two protruding ends. The limiting post 133 is slidably mounted on one of the protruding ends of the U-shaped block 132 along the protruding direction of the protruding end of the U-shaped block 132. A spring is fitted onto the limiting post 133, with one end connected to the protruding end of the U-shaped block 132 and the other end connected to the limiting post 133. The spring is used to ensure that the limiting post 133 always tends to move towards the protruding end of the U-shaped block 132. One end of the limiting strip 134 is rotatably connected to the other protruding end of the U-shaped block 132 and is located at the opening of the U-shaped groove. The other end of the limiting strip 134 is hung on the limiting post 133.

[0047] The hydrogen connection gun 22 has a snap-fit ​​section on its head that can be adapted to snap-fit ​​with the U-shaped groove of the U-shaped block 132.

[0048] The dustproof chamber 131 of the mounting structure 13 prevents dust and other impurities from entering the nozzle of the hydrogen connection gun 22, protecting the cleanliness of the nozzle and ensuring the sealing and reliability of the connection between the hydrogen connection gun 22 and the vehicle's hydrogen refueling port. The limiting structure composed of the U-shaped block, the limiting post 133, the spring, and the limiting strip 134 can firmly fix the hydrogen connection gun 22, preventing it from accidentally falling off during equipment movement or idleness, further improving the safety and stability of the hydrogen connection gun 22 during storage.

[0049] In some embodiments, the detection chamber 10 may be adopted as follows: Figure 1 The structure shown. See also Figure 1 The detection box 10 is equipped with a handle 14, which is used for the operator to hold.

[0050] The handle 14 on the test chamber 10 makes it easy for operators to move and adjust the position of the equipment by hand. This greatly reduces the labor intensity of operators and improves the portability of the equipment, especially when it is necessary to move the equipment to different hydrogen refueling machines or car hydrogen refueling ports.

[0051] In some embodiments, the detection chamber 10 may be adopted as follows: Figure 1 , Figure 3 The structure shown. See also Figure 1 , Figure 3 The bottom of the testing box 10 is provided with multiple wheels 15, each wheel 15 is used for sliding of the testing box 10.

[0052] The wheels 15 at the bottom of the inspection box 10 allow the equipment to slide easily on the ground. Compared with traditional handling methods, operators can move the equipment to the required location more conveniently, further improving the equipment's mobility and flexibility of use.

[0053] In some embodiments, the detection chamber 10 may be adopted as follows: Figure 3 , Figure 4 The structure shown. See also Figure 3 , Figure 4 The detection chamber 10 is provided with a first hydrogen inlet 111 and a second hydrogen inlet 112 that are connected to each of the connecting gas guns 20. The first hydrogen inlet 111 and the second hydrogen inlet 112 together constitute the first connection position 11.

[0054] The first hydrogen inlet 111 and the second hydrogen inlet 112 on the detection chamber 10 together form the first connection position 11, which is connected to each connection gas gun 20. This setting increases the number of channels for hydrogen to enter the equipment, ensures the stability and sufficiency of hydrogen supply, can meet the needs of multiple connection gas guns 20 to perform metrological verification at the same time, and improves the working performance of the equipment.

[0055] In some embodiments, the detection chamber 10 may be adopted as follows: Figure 3 , Figure 4 The structure shown. See also Figure 3 , Figure 4 The detection box 10 is equipped with an inspection door 16, which is used for operators to carry out maintenance.

[0056] The inspection door 16 installed on the detection housing 10 provides operators with a convenient passage to enter the equipment for inspection and maintenance. When the equipment malfunctions or when components such as the detection module and fixed pipelines need to be inspected, replaced, or maintained, operators can quickly enter the equipment by opening the inspection door 16, greatly shortening the maintenance time and improving the maintainability of the equipment.

[0057] In some embodiments, the detection chamber 10 may be adopted as follows: Figure 3 , Figure 4 The structure shown. See also Figure 3 , Figure 4 The detection chamber 10 is provided with a third connection position 17, which is connected to a fixed pipeline and has a pressure relief port.

[0058] The third connection position 17 and pressure relief port on the detection chamber 10 can release pressure in a timely manner when the internal pressure of the equipment is too high, preventing damage to the equipment due to excessive pressure and ensuring the safe operation of the equipment. At the same time, the pressure relief port also helps to remove residual hydrogen gas inside the equipment during maintenance or replacement of parts, reducing safety risks during operation.

[0059] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A metering and verification device for a hydrogen refueling machine for automobiles, characterized in that, include: The detection chamber has a hollow accommodating cavity; a fixed pipeline is provided in the accommodating cavity; a detection module is installed on the fixed pipeline; the detection chamber is respectively provided with a first connection position and a second connection position connected to one end of the fixed pipeline; wherein the first connection position is used for the hydrogen refueling machine to be inserted. Connect the air gun to the other end of the fixed pipeline for connection to the hydrogen refueling port of the vehicle; Before the hydrogen refueling machine is connected to the first connection point, the air in the fixed pipeline and the connecting gas gun is purged by connecting the second connection point to the protective gas supply unit.

2. The metering and verification equipment for automotive hydrogen refueling machines as described in claim 1, characterized in that, One end of the fixed pipeline is equipped with a three-way valve, which is connected to the fixed pipeline, the first connection position and the second connection position respectively.

3. The metering and verification equipment for automotive hydrogen refueling machines as described in claim 2, characterized in that, At least two connecting air guns are provided, and each connecting air gun includes: A connecting tube is provided, with one end mounted on the detection chamber and connected to the fixed pipeline, and the other end extending out of the detection chamber. A hydrogen connection gun is attached to the protruding end of the corresponding connection tube.

4. The metering and verification equipment for automotive hydrogen refueling machines as described in claim 3, characterized in that, The outer wall of the testing chamber is provided with multiple hanging structures, each of which is configured to correspond one-to-one with each of the hydrogen connection guns, and the hanging structures are used for hanging the hydrogen connection guns.

5. The metering and verification equipment for automotive hydrogen refueling machines as described in claim 4, characterized in that, Each of the aforementioned mounting structures is for mounting the corresponding hydrogen connection gun, and each of the aforementioned mounting structures includes: A dustproof chamber is fixed on the outer wall of the detection box, and the dustproof chamber has a dust cover for placing the nozzle of the corresponding hydrogen connection gun. The U-shaped block is fixed on the dustproof chamber and located below the dustproof cover. It has a U-shaped groove for the corresponding hydrogen connection gun to be engaged. The U-shaped block has two protruding ends. A limiting post is slidably disposed on one of the protruding ends of the U-shaped block along the protruding direction of the protruding end of the U-shaped block; A spring is sleeved on the limiting post. One end of the spring is connected to the protruding end of the U-shaped block, and the other end of the spring is connected to the limiting post. The spring is used to make the limiting post always have a tendency to move toward the protruding end of the U-shaped block. A limiting strip is rotatably connected at one end to the other protruding end of the U-shaped block and located at the opening of the U-shaped groove; the other end of the limiting strip is hung on the limiting post. The hydrogen connection gun head is provided with a snap-fit ​​section that can be adapted to and snap-fit ​​with the U-shaped groove of the U-shaped block.

6. The metering and verification equipment for a hydrogen refueling machine for automobiles as described in any one of claims 1-5, characterized in that, The detection box is equipped with a handle for the operator to hold.

7. The metering and verification equipment for a hydrogen refueling machine for automobiles as described in any one of claims 1-5, characterized in that, The bottom of the testing box is equipped with multiple wheels, each of which is used for sliding the testing box.

8. The metering and verification equipment for a hydrogen refueling machine for automobiles as described in any one of claims 1-5, characterized in that, The detection chamber is provided with a first hydrogen inlet and a second hydrogen inlet that are connected to each of the connecting gas guns. The first hydrogen inlet and the second hydrogen inlet together constitute the first connection position.

9. The metering and verification equipment for a hydrogen refueling machine for automobiles as described in any one of claims 1-5, characterized in that, The testing box is equipped with an inspection door, which is used for operators to perform maintenance.

10. The metering and verification equipment for a hydrogen refueling machine for automobiles as described in any one of claims 1-5, characterized in that, The detection chamber is provided with a third connection position, which is connected to the fixed pipeline, and the third connection position is provided with a pressure relief port.

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