Hydrogen dispensing device for hydrogen refueling station

Abstract

The application relates to the field of hydrogen diffusion, and provides a hydrogen diffusion device for a hydrogen refueling station vehicle, which comprises a main pipe, a gas leakage assembly, a recovery assembly, a diffusion assembly, a recovery valve and a diffusion valve; the gas leakage assembly comprises a plurality of gas leakage units, the gas leakage units are connected with the main pipe, the gas leakage units are used for communicating with hydrogen discharge ports of hydrogen refueling vehicles, and hydrogen in the hydrogen refueling vehicles is guided into the main pipe; the recovery assembly comprises a recovery pipeline and a buffer tank, a first valve, a compressor and a hydrogen storage tank which are sequentially arranged on the recovery pipeline; the diffusion assembly comprises a first diffusion pipeline and a diffusion tower, and the diffusion tower is connected with the main pipe through the first diffusion pipeline. According to the application, hydrogen is guided into the main pipe through the gas leakage assembly, then the recovery valve and the diffusion valve are regulated and controlled, hydrogen in the main pipe flows into the recovery pipeline and / or the first diffusion pipeline, and then the hydrogen diffusion device for the hydrogen refueling station vehicle can flexibly switch working modes according to actual demands, and the problems of high hydrogen diffusion risk and resource waste are solved.

Description

Technical Field

[0001] This application relates to the field of hydrogen emission, and more particularly to a hydrogen emission device for vehicles at hydrogen refueling stations. Background Technology

[0002] Hydrogen-fueled vehicles may need to release hydrogen in cases of overfilling, maintenance, or other emergencies.

[0003] The most common way to release hydrogen is to release the hydrogen inside the hydrogen refueling vehicle into the air through a venting pipeline or venting tower.

[0004] However, if multiple hydrogen refueling vehicles need to release hydrogen simultaneously, a large amount of hydrogen will be released into the air in a short period of time. As hydrogen is a flammable gas, releasing a large amount of hydrogen in a short period of time may cause safety accidents. In addition, as hydrogen is an energy gas, directly releasing large quantities will also lead to the waste of resources. Summary of the Invention

[0005] To address the high risks and resource waste caused by hydrogen venting, this application provides a hydrogen venting device for vehicles at hydrogen refueling stations.

[0006] The technical solution for a hydrogen venting device for vehicles at a hydrogen refueling station provided in this application is as follows: A hydrogen venting device for vehicles at a hydrogen refueling station, comprising: Manager.

[0007] The venting assembly includes multiple venting units connected to the main pipe. The venting units are used to communicate with the hydrogen exhaust port of the hydrogen refueling vehicle and to introduce hydrogen from the hydrogen refueling vehicle into the main pipe.

[0008] The recovery assembly includes a recovery pipeline and a buffer tank, a first valve, a compressor, and a hydrogen storage tank sequentially disposed on the recovery pipeline.

[0009] The venting assembly includes a first venting pipeline and a venting tower, wherein the venting tower is connected to the main pipeline through the first venting pipeline.

[0010] A recovery valve is installed in the recovery pipeline and located between the buffer tank and the main pipe.

[0011] A vent valve is installed in the first vent pipeline.

[0012] By adopting the above technical solution, the hydrogen venting device for hydrogen refueling stations can simultaneously and safely vent and reuse hydrogen from multiple hydrogen refueling vehicles. Specifically: The venting assembly can connect to the hydrogen exhaust ports of multiple hydrogen refueling vehicles simultaneously through multiple venting units, enabling the hydrogen inside the vehicles to be quickly and effectively introduced into the main pipe, thus improving hydrogen collection efficiency.

[0013] The design of the buffer tank, first valve, compressor, and hydrogen storage tank in the recovery assembly ensures the safety and efficiency of the hydrogen recovery process. By pressurizing and storing the recovered hydrogen, hydrogen waste is avoided.

[0014] The first venting line and venting tower in the venting assembly can safely release excess hydrogen into the atmosphere when necessary, preventing safety hazards caused by system overpressure.

[0015] The inclusion of recovery and venting valves allows the system to flexibly switch between hydrogen recovery mode, venting mode, or simultaneous hydrogen recovery and venting mode according to actual needs, improving the system's adaptability and reliability.

[0016] Preferably, the venting unit includes a pressure relief pipeline and an opening / closing unit, a pressure detection unit, a safety valve, and a first check valve disposed on the pressure relief pipeline.

[0017] The opening and closing unit is used to close or open the pressure relief pipeline.

[0018] The pressure detection unit is used to detect the hydrogen pressure in the pressure relief pipeline.

[0019] The pressure relief line has a vehicle connection interface for connecting to the hydrogen vent of the hydrogen refueling vehicle.

[0020] By adopting the above technical solutions, the opening and closing unit can realize the closure or opening of the pressure relief pipeline, effectively controlling the safety of the hydrogen emission process; the pressure detection unit can monitor the hydrogen pressure in the pressure relief pipeline in real time, ensuring that the pressure is stable and controllable during the hydrogen emission process, and preventing safety hazards caused by excessive pressure; the safety valve can automatically open in the case of overpressure, further ensuring system safety; the first one-way valve ensures that hydrogen can only flow from the hydrogen refueling vehicle to the main pipe, avoiding backflow and improving the reliability and safety of the system.

[0021] Preferably, the venting unit further includes a telescopic tube and a quick-connect adapter, the quick-connect adapter being connected to the vehicle interface via the telescopic tube, and the quick-connect adapter being used to connect to the hydrogen vent of the hydrogen refueling vehicle.

[0022] By adopting the above technical solution, the quick-connect adapter connects to the vehicle interface via a telescopic tube, and is used to connect to the hydrogen exhaust port of the hydrogen refueling vehicle. This design allows for quick connection and disconnection, improving operational efficiency. Simultaneously, the telescopic tube design enables flexible use of the equipment in different locations, increasing the adaptability and reliability of the device.

[0023] Preferably, the venting assembly further includes a second venting pipeline and a second valve. One end of the second venting pipeline is connected to the buffer tank, and the other end is connected to the portion of the first venting pipeline located between the venting valve and the venting tower. The second valve is located on the second venting pipeline.

[0024] By adopting the above technical solution, the hydrogen gas in the buffer tank can enter the first venting pipeline and finally be vented through the venting tower.

[0025] Preferably, the hydrogen refueling station vehicle hydrogen venting device further includes a first pressure sensor and a second pressure sensor.

[0026] The first pressure sensor is located on the main pipe.

[0027] The second pressure sensor is installed in the first venting pipeline and is located on the side of the connection point between the second venting pipeline and the first venting pipeline, close to the venting tower.

[0028] By adopting the above technical solution, the first pressure sensor is installed on the main pipe, which can monitor the hydrogen pressure in the main pipe in real time, so as to adjust the opening of the recovery valve and the venting valve according to the hydrogen pressure value in the main pipe. The second pressure sensor is installed in the first venting pipeline, and is located on the side of the connection point between the second venting pipeline and the first venting pipeline close to the venting tower. It can accurately monitor the pressure change of hydrogen during the venting process, adjust the venting operation in a timely manner, and prevent safety accidents caused by overpressure. These two measures together improve the safety and reliability of the entire system.

[0029] Preferably, the venting tower comprises: Base.

[0030] The tower body includes a first pipe, a second pipe, and a third pipe arranged coaxially. One end of the first pipe is connected to the base, and one end of the second pipe is inserted into the inner side of the end of the first pipe away from the base and is slidably connected to the first pipe.

[0031] The third pipe is partially inserted into the other end of the second pipe and slidably connected to the second pipe.

[0032] The first adjustment unit is connected to the tower body and is used to drive the third pipe to slide relative to the base, thereby changing the height of the tower body.

[0033] By adopting the above technical solution, the design of the venting tower allows for flexible height adjustment, ensuring that hydrogen is vented at an appropriate height. Specifically, the base provides a stable support foundation, and the multi-stage telescopic design of the first, second, and third pipes makes the tower height adjustable to adapt to different venting height requirements. The addition of the first adjustment unit further enhances the convenience and accuracy of height adjustment, ensuring the safety and effectiveness of the venting process. Furthermore, when not venting, the tower can be retracted to reduce space occupation.

[0034] Preferably, the third pipe includes a venting section, a telescopic section, and an intake section connected in sequence; The air intake section is located inside the first pipe, and the air intake section is provided with an air intake connector that communicates with its interior. The air intake connector passes through the first pipe and is used to connect with the first vent pipe.

[0035] By adopting the above technical solution, the third pipeline of the venting tower is designed to include a venting section, an expansion section, and an inlet section connected in sequence. The inlet section is connected to the first venting pipeline through an inlet connector, allowing hydrogen in the first venting pipeline to be directly discharged into the third pipeline for venting, thus preventing hydrogen leakage. The expansion section of the third pipeline can adapt to changes in the height of the tower, ensuring the stability of hydrogen venting.

[0036] Preferably, the third pipe has a vent hole on the side wall at the end away from the base.

[0037] By adopting the above scheme, the hydrogen in the third pipe can be released simultaneously through the vent hole and the opening at the end of the third pipe away from the base. The hydrogen released through the vent hole and the hydrogen released through the end opening have different flow directions, thus avoiding excessively high hydrogen concentration in local areas.

[0038] Preferably, the venting tower further includes a rain cover and a second regulating unit.

[0039] The rain cover is located on the side of the third pipe away from the base. The side of the rain cover near the third pipe has a sealing part, which is used to block the opening at the end of the third pipe away from the base and the vent hole.

[0040] The second adjustment unit is connected to the rain cover and is used to drive the rain cover closer to or away from the third pipe.

[0041] By adopting the above technical solution, the rain cover can effectively prevent rainwater or other impurities from entering the venting tower, avoiding affecting the safety and efficiency of the venting process. The sealing part can block the end opening of the third pipe away from the base and the vent hole, ensuring the airtightness of the venting tower in the non-venting state and further reducing the risk of debris entering the venting tower. The second adjustment unit allows the rain cover to automatically adjust its position as needed, thereby driving the rain cover to block or open the end opening of the third pipe away from the base and the vent hole.

[0042] Preferably, the second adjustment unit is connected to the rain cover via an elastic element, which is capable of deforming along the axial direction of the third pipe.

[0043] By adopting the above technical solution, when the air pressure in the third pipe is high, the air pressure can directly push the rain cover open and release the pressure, thus avoiding safety accidents caused by the rain cover not being opened in time.

[0044] The hydrogen venting device for hydrogen refueling stations disclosed in this application guides hydrogen from the refueling vehicle into the main pipe through a venting assembly. By regulating the recovery valve and the venting valve, the hydrogen in the main pipe flows into the recovery pipeline and / or the first venting pipeline. This allows the hydrogen venting device to flexibly switch between hydrogen recovery mode, venting mode, or simultaneous hydrogen recovery and venting mode according to actual needs, improving the system's adaptability and reliability and solving the problems of high risk and resource waste caused by hydrogen venting. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the hydrogen venting device for vehicles at hydrogen refueling stations provided in this application.

[0046] Figure 2 This is a schematic diagram of the structure of the venting tower of the hydrogen venting device for vehicles at hydrogen refueling stations provided in this application.

[0047] Figure 3 This is a front view of the venting tower of the hydrogen venting device for vehicles at hydrogen refueling stations provided in this application.

[0048] Explanation of reference numerals in the attached figures: 1. Main pipe; 11. First pressure sensor; 2. Venting assembly; 21. Pressure relief pipeline; 211. Vehicle connection interface; 22. Opening and closing unit; 23. Pressure detection unit; 24. Safety valve; 25. First check valve; 3. Recovery components; 31. Recovery pipeline; 32. Buffer tank; 33. First valve; 34. Compressor; 35. Hydrogen storage tank; 36. Fourth check valve; 4. Venting assembly; 41. First venting pipeline; 42. Venting tower; 421. Base; 422. First pipeline; 423. Second pipeline; 424. Third pipeline; 4241. Venting section; 4242. Telescopic section; 4243. Air inlet section; 4244. Air inlet connector; 4245. Venting hole; 425. First cylinder; 426. Second cylinder; 427. Rain cover; 4271. Sealing part; 428. Second regulating unit; 4281. Third cylinder; 4282. Connecting frame; 429. Elastic element; 43. Second venting pipeline; 44. Second valve; 45. Second pressure sensor; 46. Second check valve; 47. Third check valve; 5. Recovery valve; 6. Venting valve; 200. Hydrogen-fueled vehicles. Detailed Implementation

[0049] The following is in conjunction with the appendix Figures 1 to 3 This application will be described in further detail.

[0050] like Figure 1 As shown in the figure, this application discloses a hydrogen venting device for vehicles at a hydrogen refueling station, including: a main pipe 1, a venting assembly 2, a recovery assembly 3, a venting assembly 4, a recovery valve 5, and a venting valve 6.

[0051] The venting assembly 2 includes multiple venting units, which are connected to the main pipe 1. The venting units are used to connect to the hydrogen discharge port of the hydrogen refueling vehicle 200 and introduce the hydrogen in the hydrogen refueling vehicle 200 into the main pipe 1.

[0052] The recovery assembly 3 includes a recovery pipeline 31 and a buffer tank 32, a first valve 33, a compressor 34 and a hydrogen storage tank 35 sequentially disposed on the recovery pipeline 31.

[0053] The venting assembly 4 includes a first venting pipe 41 and a venting tower 42, with the venting tower 42 connected to the main pipe 1 via the first venting pipe 41.

[0054] The recovery valve 5 is located on the recovery pipeline 31 and between the buffer tank 32 and the main pipe 1.

[0055] The vent valve 6 is located in the first vent pipeline 41.

[0056] Specifically, the venting unit includes a pressure relief pipeline 21 and an opening and closing unit 22, a pressure detection unit 23, a safety valve 24, and a first check valve 25 provided on the pressure relief pipeline 21.

[0057] The pressure relief line 21 is connected to the main pipe 1. The pressure relief line 21 has a vehicle connection interface 211 for connecting to the hydrogen discharge port of the hydrogen refueling vehicle 200. When it is necessary to release the hydrogen in the hydrogen refueling vehicle 200, simply connect the vehicle connection interface 211 to the hydrogen discharge port of the hydrogen refueling vehicle 200 to connect the hydrogen discharge port to the pressure relief line 21.

[0058] The pressure detection unit 23 may include a pressure gauge and a pressure sensor, both of which are used to detect the hydrogen pressure in the pressure relief line 21. Operators can determine the hydrogen pressure in the pressure relief line 21 based on the pressure gauge reading.

[0059] The opening / closing unit 22 may include one or more needle valves, which can be operated to close or open the pressure relief line 21. When the pressure relief line 21 is open, hydrogen gas in the pressure relief line 21 can enter the main pipe 1.

[0060] Safety valve 24 can automatically open and relieve pressure in case of overpressure, further ensuring system safety.

[0061] The first one-way valve 25 is used to ensure that hydrogen can only flow from the hydrogen refueling vehicle 200 to the main pipe 1, thus preventing backflow.

[0062] Furthermore, the venting unit also includes a telescopic tube and a quick-connect adapter. The quick-connect adapter connects to the vehicle interface 211 via the telescopic tube, and is used to connect to the hydrogen vent of the hydrogen refueling vehicle 200. The quick-connect adapter allows for quick connection and disconnection from the hydrogen vent of the hydrogen refueling vehicle 200, thereby improving efficiency. The telescopic tube allows the quick-connect adapter to move freely, enabling it to quickly respond to and connect to hydrogen refueling vehicles 200 parked in different locations and to hydrogen vents located at different positions within the vehicle.

[0063] The main pipe 1 is equipped with a first pressure sensor 11, which is used to detect the hydrogen pressure in the main pipe 1 so as to determine whether to introduce hydrogen into the recovery pipeline 31 and / or the first venting pipeline 41 according to the gas pressure in the main pipe 1.

[0064] For example, when the gas pressure in the main pipe 1 is high, the recovery valve 5 and the venting valve 6 can be opened simultaneously, allowing the hydrogen in the main pipe 1 to enter the recovery pipeline 31 and the first venting pipeline 41 respectively, thereby quickly reducing the pressure in the main pipe 1. In addition, since some of the hydrogen in the main pipe 1 enters the recovery pipeline 31, the amount of hydrogen entering the venting tower 42 through the first venting pipeline 41 is reduced, preventing a safety accident caused by the release of a large amount of hydrogen in a short period of time.

[0065] When the gas pressure in the recovery pipeline 31 is greater than the internal pressure of the buffer tank 32, hydrogen can enter the buffer tank 32. As the gas pressure in the buffer tank 32 gradually increases, when the gas pressure increases to a level greater than the gas pressure in the recovery pipeline 31, the hydrogen in the recovery pipeline 31 can no longer spontaneously enter the buffer tank 32. At this time, the first valve 33 can be opened to further pressurize the hydrogen in the buffer tank 32 through the compressor 34 and then introduce it into the hydrogen storage tank 35 for recovery. At the same time, after the hydrogen in the buffer tank 32 is discharged, the buffer tank 32 can collect the hydrogen in the recovery pipeline 31 again.

[0066] In addition, both the buffer tank 32 and the hydrogen storage tank 35 are equipped with concentration sensors to detect the hydrogen concentration inside each.

[0067] The venting assembly 4 also includes a second venting pipeline 43 and a second valve 44. One end of the second venting pipeline 43 is connected to the buffer tank 32, and the other end is connected to the part of the first venting pipeline 41 between the venting valve 6 and the venting tower 42. The second valve 44 is located on the second venting pipeline 43.

[0068] By setting up a second venting pipeline 43 and a second valve 44, the hydrogen gas in the buffer tank 32 can flow into the first venting pipeline 41 through the second venting pipeline 43 and finally be released through the venting tower 42.

[0069] For example, if the amount of hydrogen in the buffer tank 32 is low for a long time and there is no value in pressurizing and recovering it, the hydrogen in the buffer tank 32 can be released according to actual needs.

[0070] For example, when the hydrogen in the hydrogen storage tank 35 reaches its capacity limit, but the hydrogen storage tank 35 is not replaced in time, the hydrogen in the buffer tank 32 cannot be pressurized and introduced into the hydrogen storage tank 35. At this time, in order to avoid excessive pressure in the buffer tank 32, the second valve 44 can be opened to discharge the hydrogen in the buffer tank 32 into the first venting pipeline 41 and finally vent it.

[0071] The hydrogen in buffer tank 32 needs to be released at an appropriate time. A second pressure sensor 45 can be installed on the first venting line 41, located near the venting tower 42 at the connection point between the second venting line 43 and the first venting line 41. The second pressure sensor 45 is used to detect the gas pressure in the first venting line 41 in its area. When the gas pressure detected by the second pressure sensor 45 is high, it is not advisable to release the hydrogen in buffer tank 32 into the first venting line 41 to avoid a safety accident caused by the venting tower 42 releasing a large amount of hydrogen in a short period of time. The release of hydrogen in buffer tank 32 should be carried out when the gas pressure detected by the second pressure sensor 45 is low.

[0072] In other embodiments, the second venting line 43 can be used to connect the buffer tank 32 and the venting tower 42, thereby making the second venting line 43 a backup venting line, which can vent the hydrogen in the main pipe 1 even if the first venting line 41 fails.

[0073] In addition, a second check valve 46 is provided on the second venting pipeline 43, a third check valve 47 is provided on the first venting pipeline 41, and a fourth check valve 36 is provided on the recovery pipeline 31. The second check valve 46, the third check valve 47 and the fourth check valve 36 are all used to prevent hydrogen from flowing back in their respective pipelines.

[0074] like Figure 2 and Figure 3 As shown, in some embodiments, the venting tower 42 includes a base 421, a tower body, and a first adjusting unit. The tower body includes a first pipe 422, a second pipe 423, and a third pipe 424 coaxially arranged. One end of the first pipe 422 is connected to the base 421. One end of the second pipe 423 is inserted into the inner side of the end of the first pipe 422 away from the base 421 and is slidably connected to the first pipe 422. The third pipe 424 is partially inserted into the other end of the second pipe 423 and is slidably connected to the second pipe 423. The first adjusting unit is connected to the tower body and is used to drive the third pipe 424 to slide relative to the base 421, thereby changing the height of the tower body.

[0075] Specifically, the first pipe 422, the second pipe 423 and the third pipe 424 are all vertically arranged. The first pipe 422 is located on the base 421. The connection strength between the outer peripheral wall of the first pipe 422 and the base 421 can be increased by setting reinforcing ribs, etc., to prevent the first pipe 422 from tilting.

[0076] The first regulating unit may include a first cylinder 425 and a second cylinder 426, both of which are arranged along the axis of the third pipe 424. The cylinder body of the first cylinder 425 is connected to the first pipe 422 or the base 421, and the piston is connected to the second pipe 423. The cylinder body of the second cylinder 426 is connected to the second pipe 423, and the piston is connected to the third pipe 424. By extending and retracting the first cylinder 425 and the second cylinder 426, the height of the tower can be changed, thereby allowing hydrogen to be released at a suitable height and improving the safety of the release.

[0077] Furthermore, the third pipe 424 includes a venting section 4241, a telescopic section 4242, and an intake section 4243 connected in sequence.

[0078] An intake section 4243 is located inside the first pipe 422 and connected to the base 421. An intake connector 4244 communicating with the interior of the intake section 4243 is provided on the intake section 4243. The intake connector 4244 passes through the first pipe 422 and is used to connect to the first venting pipe 41. Hydrogen gas in the first venting pipe 41 enters the intake section 4243 through the intake connector 4244, flows sequentially through the expansion section 4242 and the venting section 4241, and is finally vented to the outside from the top of the venting section 4241.

[0079] Compared to connecting the first venting pipe 41 to the inside of the first pipe 422, connecting the first venting pipe 41 to the third pipe 424 can prevent hydrogen from leaking from the gaps between the first pipe 422, the second pipe 423 and the third pipe 424, thus avoiding safety accidents caused by the hydrogen venting height being too low.

[0080] When the height of the tower changes, the expansion section 4242 of the third pipe 424 can expand and contract to accommodate the movement of the venting section 4241.

[0081] In some embodiments, a vent hole 4245 is provided on the side wall of the end of the third pipe 424 away from the base 421, so that both the top opening of the third pipe 424 and the vent hole 4245 can vent hydrogen, thereby improving the venting efficiency.

[0082] In addition, the hydrogen flowing out of the vent hole 4245 flows in a different direction than the hydrogen flowing out of the top opening of the third pipe 424, so that the hydrogen is evenly released in different directions, preventing the hydrogen concentration in a local area from being too high and causing a safety accident.

[0083] like Figure 2 and Figure 3 As shown, in some embodiments, the venting tower 42 further includes a rain cover 427 and a second regulating unit 428.

[0084] The rain cover 427 is located on the side of the third pipe 424 away from the base 421. The second adjustment unit 428 includes a third cylinder 4281 and a connecting frame 4282. The third cylinder 4281 is arranged along the axial direction of the third pipe 424. The cylinder body of the third cylinder 4281 is connected to the venting section 4241 of the third pipe 424. The piston of the third cylinder 4281 is connected to the rain cover 427 through the connecting frame 4282. The third cylinder 4281 can drive the rain cover 427 to move closer to or away from the third pipe 424 by extension and retraction.

[0085] When hydrogen is released, the rain cover 427 is driven away from the third conduit 424 to allow sufficient space for hydrogen release.

[0086] The rain cover 427 has a sealing part 4271 on the side near the third pipe 424. When the rain cover 427 gradually approaches the third pipe 424, the sealing part 4271 can be sleeved on the outside of the third pipe 424 and block the opening at the end of the third pipe 424 away from the base 421 and the vent hole 4245, thereby preventing external debris from entering the third pipe 424.

[0087] Furthermore, the second adjusting unit 428 and the rain cover 427 are connected by an elastic element 429, which can deform along the axial direction of the third pipe 424. For example, the elastic element 429 can be a spring arranged along the axial direction of the third pipe 424, with one end connected to the rain cover 427 and the other end connected to the connecting bracket 4282. The spring arrangement ensures that when the cover 4271 is fitted onto the outside of the third pipe 424, if the air pressure inside the third pipe 424 increases abnormally, the air pressure can directly push the rain cover 427 away from the third pipe 424 to release pressure, thus preventing the pressure inside the third pipe 424 from not being released in time due to the third cylinder 4281 not driving the rain cover 427 to move in time.

Claims

1. A hydrogen venting device for vehicles at a hydrogen refueling station, characterized in that, include: General Manager (1); The venting assembly (2) includes multiple venting units, which are connected to the main pipe (1). The venting units are used to communicate with the hydrogen discharge port of the hydrogen refueling vehicle (200) and introduce the hydrogen in the hydrogen refueling vehicle (200) into the main pipe (1). The recovery assembly (3) includes a recovery pipeline (31) and a buffer tank (32), a first valve (33), a compressor (34) and a hydrogen storage tank (35) sequentially disposed on the recovery pipeline (31). The venting assembly (4) includes a first venting pipeline (41) and a venting tower (42), wherein the venting tower (42) is connected to the main pipe (1) through the first venting pipeline (41); A recovery valve (5) is provided in the recovery pipeline (31) and located between the buffer tank (32) and the main pipe (1); A vent valve (6) is provided in the first vent pipeline (41); The venting tower (42) includes: Base (421); The tower body includes a first pipe (422), a second pipe (423) and a third pipe (424) arranged coaxially. One end of the first pipe (422) is connected to the base (421), and one end of the second pipe (423) is inserted into the inner side of the end of the first pipe (422) away from the base (421) and is slidably connected to the first pipe (422). The third pipe (424) is partially inserted into the other end of the second pipe (423) and slidably connected to the second pipe (423); The first adjustment unit is connected to the tower body and is used to drive the third pipe (424) to slide relative to the base (421), thereby changing the height of the tower body; The third pipe (424) has a vent hole (4245) on the side wall at the end away from the base (421). The venting tower (42) also includes a rain cover (427) and a second regulating unit (428); The rain cover (427) is located on the side of the third pipe (424) away from the base (421). The rain cover (427) has a sealing part (4271) on the side of the third pipe (424) close to the third pipe (424). The sealing part (4271) is used to block the opening at the end of the third pipe (424) away from the base (421) and the vent hole (4245). The second adjustment unit (428) is connected to the rain cover (427) and is used to drive the rain cover (427) closer to or further away from the third pipe (424).

2. The hydrogen venting device for vehicles at hydrogen refueling stations according to claim 1, characterized in that: The venting unit includes a pressure relief pipeline (21) and an opening and closing unit (22), a pressure detection unit (23), a safety valve (24), and a first check valve (25) provided on the pressure relief pipeline (21). The opening and closing unit (22) is used to close or open the pressure relief pipeline (21). The pressure detection unit (23) is used to detect the hydrogen pressure in the pressure relief pipeline (21); The pressure relief line (21) has a vehicle connection interface (211) for connecting the hydrogen discharge port of the hydrogen refueling vehicle (200).

3. The hydrogen venting device for vehicles at hydrogen refueling stations according to claim 2, characterized in that: The venting unit also includes a telescopic tube and a quick-connect adapter. The quick-connect adapter is connected to the vehicle interface (211) through the telescopic tube and is used to connect to the hydrogen vent of the hydrogen refueling vehicle (200).

4. The hydrogen venting device for vehicles at hydrogen refueling stations according to claim 1, characterized in that: The venting assembly (4) further includes a second venting pipeline (43) and a second valve (44). One end of the second venting pipeline (43) is connected to the buffer tank (32), and the other end is connected to the portion of the first venting pipeline (41) between the venting valve (6) and the venting tower (42). The second valve (44) is located on the second venting pipeline (43).

5. The hydrogen venting device for vehicles at hydrogen refueling stations according to claim 4, characterized in that: The hydrogen refueling station vehicle hydrogen venting device also includes a first pressure sensor (11) and a second pressure sensor (45); The first pressure sensor (11) is mounted on the main pipe (1); The second pressure sensor (45) is located on the first venting pipeline (41) and is located on the side of the connection point between the second venting pipeline (43) and the first venting pipeline (41) near the venting tower (42).

6. The hydrogen venting device for vehicles at hydrogen refueling stations according to claim 1, characterized in that: The third pipe (424) includes a venting section (4241), a telescopic section (4242), and an intake section (4243) connected in sequence. The air intake section (4243) is located inside the first pipe (422). The air intake section (4243) is provided with an air intake connector (4244) that communicates with its interior. The air intake connector (4244) passes through the first pipe (422) and is used to connect with the first vent pipe (41).

7. The hydrogen venting device for vehicles at hydrogen refueling stations according to claim 1, characterized in that: The second adjustment unit (428) is connected to the rain cover (427) by an elastic element (429), which is capable of deforming along the axial direction of the third pipe (424).

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