A hydrogen injection device for hydrogen refueling stations

Abstract

This utility model discloses a hydrogen injection device for a hydrogen refueling station, including a cooling tank. A first connecting pipe and a second pair of connecting pipes are fixedly installed opposite each other on both sides of the cooling tank. A heat exchange pipe is fixed between the first connecting pipe and the second pair of connecting pipes. Multiple filter cartridges are arranged on the side of the cooling tank closest to the first connecting pipe. Each filter cartridge contains a primary filter screen, a secondary ceramic fiber filter element, and a terminal polymer membrane filter element. The filter cartridges closest to the cooling tank are connected to the first connecting pipe, and the multiple filter cartridges are connected to each other via the second connecting pipe. The top of the filter cartridges furthest from the cooling tank is fixed with the first pair of connecting pipes. Through this structure, the cooling tank effectively suppresses temperature rise during refueling, reducing safety risks caused by the easily elevated temperature of hydrogen during refueling. The three-stage filtration module reduces potential damage to components from contaminant particles in the hydrogen fuel, effectively extending the lifespan of critical components.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen injection technology, and in particular to a hydrogen injection device for hydrogen refueling stations. Background Technology

[0002] With the rapid development of new energy vehicles, hydrogen fuel cell vehicles have received widespread attention and importance due to their environmental characteristics such as zero emissions, long driving range, and fast refueling. The construction of supporting hydrogen refueling stations has also been rapidly launched, becoming a key component of the hydrogen energy infrastructure layout.

[0003] In the prior art, a search revealed a Chinese patent disclosing "A Hydrogen Injection Device for a Hydrogen Refueling Station," application number "202121427507.7." This patent mainly includes a sealing tube, a fixed tube, and a movable tube. Both the outer surfaces of the fixed tube and the movable tube have external threads, while the inner wall of the sealing tube has internal threads. The movable thread of the sealing tube connects the fixed tube and the movable tube. The inner wall of the free end of the fixed tube has an annular air inlet protrusion, and the outer wall of the free end of the fixed tube has a fan-shaped groove. The inner wall of the free end of the movable tube has an annular sealing groove, and the outer wall of the free end of the movable tube has a vertically arranged fan-shaped protrusion. Although the above patent uses a sealing tube, fixed tube, movable tube, annular air inlet protrusion, annular sealing groove, fan-shaped groove, and fan-shaped protrusion together to achieve rapid connection of the hydrogen injection pipeline, it features rapid connection, convenient operation, and high safety. However, the aforementioned hydrogen refueling devices lack a hydrogen cooling mechanism during the refueling process. Under high-pressure, rapid refueling conditions, the hydrogen temperature can easily rise, posing a safety hazard. Furthermore, the lack of a filtration and purification system allows contaminants carried by the hydrogen to directly enter the refueling system. These hard particles not only accelerate the wear of the sealing rings and may cause hydrogen leakage at the high-pressure interface, but also affect the service life of the injection system. Therefore, this invention provides a hydrogen refueling injection device for hydrogen refueling stations to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a hydrogen injection device for hydrogen refueling stations. The cooling box can effectively suppress the temperature rise during refueling and reduce the safety risks caused by the easy rise in hydrogen temperature during refueling. The three-stage filtration module reduces the damage that these contaminant particles in hydrogen fuel may cause to the components, thereby effectively extending the life of key components.

[0005] To achieve the above objectives, a hydrogen injection device for a hydrogen refueling station is provided, including a cooling tank, wherein a first connecting pipe and a second pair of connecting pipes are fixedly arranged opposite each other on both sides of the cooling tank, a heat exchange pipe is fixedly arranged between the first connecting pipe and the second pair of connecting pipes, and a plurality of filter cartridges are provided on the side of the cooling tank near the first connecting pipe.

[0006] The filter cartridge is respectively equipped with a primary filter screen, a secondary ceramic fiber filter element and a terminal polymer membrane filter element. The filter cartridges closer to the cooling box are connected to the first connecting pipe, and multiple filter cartridges are connected to each other through a second connecting pipe. The filter cartridges furthest from the cooling box are equipped with a first pair of connecting pipes at their top.

[0007] A cleaning component for cleaning the inside of the filter cartridge is provided on the side near the filter cartridge.

[0008] According to the hydrogen injection device for a hydrogen refueling station, a semiconductor refrigeration chip is embedded inside the cooling box, and a temperature sensor is fixed on the inner wall of the cooling box.

[0009] According to the hydrogen injection device for a hydrogen refueling station, the cleaning component includes a connecting pipe, a plurality of flushing pipes fixed to the bottom of the connecting pipe, and a drain pipe fixed to the bottom of the filter cartridge. The connecting pipes are all fixedly connected to corresponding first connecting pipes and second connecting pipes.

[0010] According to the hydrogen injection device for a hydrogen refueling station, valves are provided on both the flushing pipe and the drain pipe, and the bottom of the filter cylinder is designed with a conical structure.

[0011] According to the hydrogen injection device for a hydrogen refueling station, the first connecting pipe is equipped with a pressure relief valve.

[0012] According to the hydrogen injection device for a hydrogen refueling station, flanges are fixed at the ends of the first pair of connecting pipes, the second pair of connecting pipes, and the connecting pipe.

[0013] This utility model has the following beneficial effects:

[0014] 1. Compared with existing technologies, by setting up a cooling box to cool the hydrogen in the heat exchange tube, the temperature rise during refueling can be effectively suppressed, reducing the safety risks caused by the easy rise in hydrogen temperature during refueling.

[0015] 2. Compared with existing technologies, setting up a three-stage filtration module can effectively intercept solid particulate pollutants in hydrogen, reduce the damage that these pollutant particles in hydrogen fuel may cause to components, and effectively extend the life of critical components. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a first-view structural schematic diagram of a hydrogen injection device for a hydrogen refueling station according to the present invention;

[0018] Figure 2 This is a second-view structural schematic diagram of a hydrogen injection device for a hydrogen refueling station according to the present invention;

[0019] Figure 3 This is a schematic cross-sectional view of the internal structure of the filter cartridge of a hydrogen injection device for a hydrogen refueling station according to the present invention;

[0020] Figure 4 This is a cross-sectional view of the internal structure of the cooling box of a hydrogen injection device for a hydrogen refueling station according to the present invention.

[0021] Legend:

[0022] 1. Cooling box; 2. Filter cartridge; 3. Primary filter screen; 4. Intermediate ceramic fiber filter element; 5. Terminal polymer membrane filter element; 6. First connecting pipe; 7. Pressure relief valve; 8. Second connecting pipe; 9. Flushing pipe; 10. Connecting pipe; 11. Valve; 12. Flange; 13. Drain pipe; 14. Semiconductor refrigeration chip; 15. Heat exchange tube; 16. Temperature sensor; 17. First connecting pipe; 18. Second connecting pipe. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] Reference Figure 1-4 This utility model provides a hydrogen injection device for a hydrogen refueling station, which includes a cooling box 1. A first connecting pipe 6 and a second connecting pipe 18 are fixedly arranged on opposite sides inside the cooling box 1. A heat exchange pipe 15 is fixed between the first connecting pipe 6 and the second connecting pipe 18. A semiconductor refrigeration chip 14 is embedded inside the cooling box 1. A temperature sensor 16 is fixed on the inner wall of the cooling box 1.

[0025] Hydrogen enters the cooling chamber 1 through the second coupling pipe 18 and flows inside the heat exchange tube 15. The semiconductor cooling chip 14 maintains the low temperature inside the chamber based on the feedback from the temperature sensor 16. The hydrogen is rapidly cooled inside the heat exchange tube 15, reducing the safety risks caused by the easy rise in hydrogen temperature during the filling process.

[0026] The cooling box 1 has multiple filter cylinders 2 on the side near the first connecting pipe 6. The filter cylinders 2 are respectively fixed with a primary filter screen 3, a secondary ceramic fiber filter element 4 and a terminal polymer membrane filter element 5. The filter cylinders 2 near the cooling box 1 are connected to the first connecting pipe 6, and the multiple filter cylinders 2 are connected to each other through a second connecting pipe 8. The top of the filter cylinders 2 away from the cooling box 1 is fixed with a first pair of connecting pipes 17. The ends of the first pair of connecting pipes 17, the second pair of connecting pipes 18 and the connecting pipe 10 are all fixed with flanges 12 to facilitate connection with external injection pipes.

[0027] During hydrogen injection, after cooling, the gas passes sequentially through a primary filter 3, a secondary ceramic fiber filter 4, and a terminal polymer membrane filter 5. The primary filter 3 removes large particulate impurities, the secondary ceramic fiber filter 4 adsorbs micron-sized particles, and the terminal polymer membrane filter 5 completes molecular-level purification. This effectively intercepts solid particulate pollutants in the hydrogen, reducing the potential damage to components caused by these contaminant particles in the hydrogen fuel.

[0028] A cleaning assembly for cleaning the inside of the filter cartridge 2 is provided on one side near the filter cartridge 2, which is used to periodically clean the impurities accumulated inside the filter cartridge 2. The cleaning assembly includes a connecting pipe 10, a plurality of flushing pipes 9 fixed to the bottom of the connecting pipe 10, and a drain pipe 13 fixed to the bottom of the filter cartridge 2. The connecting pipe 10 is fixedly connected to the corresponding first connecting pipe 17 and second connecting pipe 8.

[0029] During flushing, shut off the hydrogenation process, connect the connecting pipe 10 to the external gas transmission system, open the valve 11 on the flushing pipe 9, and introduce high-pressure nitrogen or clean gas to back-flush the filter element, allowing impurities to be discharged from the drain pipe 13. Cleaning the filter element helps to ensure good filtration performance.

[0030] The first connecting pipe 6 is equipped with a pressure relief valve 7, which is used to automatically relieve pressure when the system pressure is abnormal, ensuring the safe operation of the equipment. Both the flushing pipe 9 and the drain pipe 13 are equipped with valves 11 to control the opening and closing of the flushing pipe 9 and the drain pipe 13, and the bottom of the filter cylinder 2 is designed with a conical structure to facilitate the accumulation and discharge of impurities.

[0031] Working principle: Hydrogen enters the cooling box 1 through the second connecting pipe 18 and flows inside the heat exchange tube 15. The semiconductor cooling chip 14 maintains the low temperature inside the box according to the feedback of the temperature sensor 16. The hydrogen is rapidly cooled in the heat exchange tube 15, reducing the safety risks caused by the easy rise in hydrogen temperature during the filling process.

[0032] During hydrogen injection, after cooling, the hydrogen passes sequentially through a primary filter 3, a secondary ceramic fiber filter 4, and a terminal polymer membrane filter 5. The primary filter 3 removes large particulate impurities, the secondary ceramic fiber filter 4 adsorbs micron-sized particles, and the terminal polymer membrane filter 5 completes molecular-level purification. This effectively intercepts solid particulate pollutants in the hydrogen, reducing the potential damage to components caused by these pollutant particles in the hydrogen fuel.

[0033] During flushing, shut off the hydrogenation process, connect the connecting pipe 10 to the external gas transmission system, open the valve 11 on the flushing pipe 9, and introduce high-pressure nitrogen or clean gas to back-flush the filter element, allowing impurities to be discharged from the drain pipe 13. Cleaning the filter element helps to ensure good filtration performance.

[0034] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. Hydrogen filling device for a hydrogen station, characterized in that, The cooling box (1) includes a first connecting pipe (6) and a second pair of connecting pipes (18) fixedly arranged on opposite sides inside the cooling box (1). A heat exchange pipe (15) is fixed between the first connecting pipe (6) and the second pair of connecting pipes (18). The cooling box (1) has multiple filter cylinders (2) on the side near the first connecting pipe (6). The filter cartridge (2) is respectively fixed with a primary filter screen (3), a secondary ceramic fiber filter element (4) and a terminal polymer membrane filter element (5). The filter cartridge (2) close to the cooling box (1) is connected to the first connecting pipe (6). Multiple filter cartridges (2) are connected to each other through a second connecting pipe (8). The filter cartridge (2) far away from the cooling box (1) is fixed with a first connecting pipe (17) at its top. A cleaning component for cleaning the inside of the filter cartridge (2) is provided on one side near the filter cartridge (2).

2. A refuelling device for a hydrogen station according to claim 1, characterized in that, The cooling box (1) is equipped with a semiconductor cooling chip (14), and a temperature sensor (16) is fixed on the inner wall of the cooling box (1).

3. A refuelling device for a hydrogen station according to claim 2, characterized in that, The cleaning assembly includes a connecting pipe (10), a plurality of flushing pipes (9) fixed at the bottom of the connecting pipe (10), and a drain pipe (13) fixed at the bottom of the filter cylinder (2). The connecting pipe (10) is fixedly connected to the corresponding first connecting pipe (17) and second connecting pipe (8).

4. A refuelling device for a hydrogen station according to claim 3, characterized in that, Both the flushing pipe (9) and the drain pipe (13) are equipped with valves (11), and the bottom of the filter cylinder (2) is designed with a conical structure.

5. A hydrogen injection device for a hydrogen refueling station according to claim 4, characterized in that, The first connecting pipe (6) is equipped with a pressure relief valve (7).

6. A refuelling device for a hydrogen station according to claim 5, characterized in that, Flanges (12) are fixed at the ends of the first pair of pipes (17), the second pair of pipes (18), and the connecting pipe (10).

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