Hydrogen inlet for vehicle-mounted hydrogen storage tank

Abstract

The utility model discloses a hydrogen filling port for a vehicle-mounted hydrogen storage tank, which comprises a hydrogen filling port cover and a hydrogen filling port connector, the inside of the hydrogen filling port connector is in threaded connection with a hydrogen filling port connecting bolt, the outside of the hydrogen filling port connecting bolt is sleeved with a fixing nut, and the fixing nut is in threaded connection with the hydrogen filling port connecting bolt. A ventilation sleeve is arranged in the hydrogen filling port connecting bolt, and a one-way valve spring is arranged in the ventilation sleeve. Belongs to the technical field of hydrogenation ports. According to the hydrogen filling port for the vehicle-mounted hydrogen storage tank, the filter element, the filter screen and the filter element seat are specially designed, and the filter device with the detachable filter screen is manufactured through threaded fit, so that the problem that most filter devices in the market are integrally machined and are high in difficulty is solved; the one-way valve guide sleeve, the hydrogen filling port one-way valve element and the filter element seat are matched with the one-way valve spring through the guide sleeve sealing ring to form a one-way valve function, and the one-way valve prevents gas from leaking outwards and prolongs the service life of the hydrogen filling port under the condition that the hydrogen filling port or a hydrogen supply pipeline is damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen filling ports, and more specifically to a hydrogen filling port for a vehicle-mounted hydrogen storage tank. Background Art

[0002] Hydrogen energy has always been the focus of attention in the global energy industry, and fuel cell vehicles are one of the important areas in the application and development of hydrogen energy. As a strategically significant clean energy, many countries around the world have included it in their national strategic plans and are accelerating the commercial demonstration and application of fuel cell vehicles. Fuel cell vehicles fill hydrogen through the hydrogen filling port at the hydrogen refueling station and store it in the on-board hydrogen storage tank. The hydrogen filling port is connected to the gas filling gun of the gas dispenser during refueling to achieve the purpose of refueling.

[0003] Most of the existing 35MPa hydrogen refueling port filter devices are of integrated design, which is difficult to process, and the gas is easy to leak out when the hydrogen supply pipeline is damaged. Therefore, we propose a hydrogen refueling port for a vehicle-mounted hydrogen storage tank. Utility Model Content

[0004] The purpose of the utility model is to provide a hydrogen filling port for a vehicle-mounted hydrogen storage tank to solve the problems raised in the above background technology:

[0005] Most of the existing 35MPa hydrogenation port filtering devices are of integrated design, which are difficult to process, and the gas is prone to leak out if the hydrogen supply pipeline is damaged.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A hydrogen filling port for a vehicle-mounted hydrogen storage tank comprises a hydrogen filling port cover and a hydrogen filling port connector, the hydrogen filling port connector is connected to a hydrogen filling system and has a gas flow channel therein, the hydrogen filling port connector is internally threadedly connected to a hydrogen filling port connecting bolt, the outer sleeve of the hydrogen filling port connecting bolt is provided with a fixing nut, the fixing nut is threadedly connected to the hydrogen filling port connecting bolt, a vent sleeve is provided inside the hydrogen filling port connecting bolt, a cavity is provided inside the hydrogen filling port connecting bolt, the vent sleeve is installed on the cavity platform inside the hydrogen filling port connecting bolt, a one-way valve spring is provided inside the vent sleeve, and the outer sleeve of the one-way valve spring is provided with a one-way valve core of the hydrogen filling port The one-way valve core of the hydrogen filling port is slidably connected with the ventilation sleeve, and the upper end surface of the ventilation sleeve is provided with a one-way valve guide sleeve. The one-way valve core of the hydrogen filling port is slidably connected with the one-way valve guide sleeve. A filter element seat is provided inside the hydrogen filling port connector and located on the upper end surface of the one-way valve core of the hydrogen filling port. The filter element seat is used in conjunction with the one-way valve core of the hydrogen filling port. Under the action of the spring force of the one-way valve, it is pressed against the lower end of the filter element seat. The internal thread of the filter element seat is connected with a filter element. The external sleeve of the filter element is provided with a filter screen. The filter screen increases the filtering function during hydrogenation to prevent hydrogen with impurities from entering the hydrogen storage system. The filter screen is detachably connected to the filter element.

[0008] Preferably, a connector sealing ring is provided inside the hydrogenation port connector.

[0009] Preferably, the outer sleeve of the filter element seat is provided with a filter element sealing ring, and the filter element sealing ring is used to seal between the hydrogenation port connector and the filter element seat.

[0010] Preferably, a guide sleeve sealing ring is provided inside the one-way valve guide sleeve, and the guide sleeve sealing ring can seal the position between the filter element seat, the one-way valve guide sleeve and the one-way valve core of the hydrogenation port.

[0011] Preferably, a bolt retaining ring is provided outside the hydrogenation port connecting bolt, and a bolt sealing ring is provided outside the hydrogenation port connecting bolt and located on the upper end surface of the bolt retaining ring, and the bolt sealing ring is used to seal between the hydrogenation port connector and the hydrogenation port connecting bolt.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1) When the hydrogen filling port for the vehicle-mounted hydrogen storage tank is in use, the hydrogen filling port is specially designed with a filter element, a filter screen, and a filter element seat, and a filter device with a detachable filter screen is made through threaded cooperation, which solves the problem of high difficulty in integrated processing of most filter devices on the market.

[0014] 2) When the hydrogen filling port for the vehicle-mounted hydrogen storage tank is in use, the one-way valve guide sleeve, the one-way valve core of the hydrogen filling port, the filter element seat cooperate with the guide sleeve sealing ring and the one-way valve spring to form a one-way valve function. The one-way valve prevents gas leakage when the hydrogen filling port or the hydrogen supply pipeline is damaged and increases the service life of the hydrogen filling port. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic cross-sectional view of the whole of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the hydrogenation port connector of the utility model;

[0018] Figure 4 It is a cross-sectional schematic diagram of the hydrogenation port connector of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the filter element of the utility model;

[0020] Figure 6 It is a cross-sectional schematic diagram of the filter element of the utility model;

[0021] Figure 7 It is a cross-sectional schematic diagram of the filter screen of the utility model;

[0022] Figure 8 It is a structural schematic diagram of the filter element seat of the utility model;

[0023] Fig. 9 It is a cross-sectional schematic diagram of the filter element seat of the utility model;

[0024] Fig.10 It is a structural schematic diagram of the one-way valve guide sleeve of the utility model;

[0025] Fig.11 It is a cross-sectional schematic diagram of the one-way valve guide sleeve of the utility model;

[0026] Fig.12 It is a structural schematic diagram of the one-way valve core of the hydrogenation port of the utility model;

[0027] Fig.13 It is a cross-sectional schematic diagram of the one-way valve core of the hydrogenation port of the utility model;

[0028] Fig.14 It is a structural schematic diagram of the ventilation sleeve of the utility model;

[0029] Fig.15 It is a cross-sectional schematic diagram of the ventilation sleeve of the utility model;

[0030] Fig.16 It is a structural schematic diagram of the hydrogenation port connecting bolt of the utility model;

[0031] Fig.17 It is a cross-sectional schematic diagram of the hydrogenation port connecting bolt of the utility model;

[0032] Fig.18 It is a structural schematic diagram of the fixing nut of the utility model.

[0033] Explanation of the numbers in the figure: 1. Hydrogenation port cover; 2. Hydrogenation port connector; 3. Connector seal; 4. Filter element; 5. Filter screen; 6. Filter element seat; 7. Filter element seal; 8. One-way valve guide sleeve; 9. Guide sleeve seal; 10. Hydrogenation port one-way valve core; 11. One-way valve spring; 12. Vent sleeve; 13. Hydrogenation port connecting bolt; 14. Bolt seal; 15. Bolt retainer; 16. Fixing nut. DETAILED DESCRIPTION

[0034] Most of the existing 35MPa hydrogenation port filter devices are of integrated design, which is difficult to process. In addition, if the hydrogen supply pipeline is damaged, the gas is prone to leak out. The following solution is used to solve this problem.

[0035] See also Figures 1 to 18 A hydrogenation port for a vehicle-mounted hydrogen storage tank. The hydrogenation port for a vehicle-mounted hydrogen storage tank is mainly suitable for a high pressure of 35MPa, including a hydrogenation port cover 1 and a hydrogenation port connector 2. The hydrogenation port connector 2 is connected to a hydrogenation system and has a gas flow channel therein. The hydrogenation port connector 2 is internally threadedly connected with a hydrogenation port connecting bolt 13. The outer sleeve of the hydrogenation port connecting bolt 13 is provided with a fixing nut 16. The fixing nut 16 is threadedly connected to the hydrogenation port connecting bolt 13. A vent sleeve 12 is provided inside the hydrogenation port connecting bolt 13. A cavity is provided inside the hydrogenation port connecting bolt 13. The vent sleeve 12 is installed on a cavity platform inside the hydrogenation port connecting bolt 13. A one-way valve spring 11 is provided inside the vent sleeve 12. The one-way valve spring The outer sleeve of 11 is provided with a hydrogenation port one-way valve core 10, which is slidably connected to the ventilation sleeve 12. The upper end surface of the ventilation sleeve 12 is provided with a one-way valve guide sleeve 8, and the hydrogenation port one-way valve core 10 is slidably connected to the one-way valve guide sleeve 8. A filter element seat 6 is provided inside the hydrogenation port connector 2 and located on the upper end surface of the hydrogenation port one-way valve core 10. The filter element seat 6 is used in conjunction with the hydrogenation port one-way valve core 10. Under the elastic force of the one-way valve spring 11, it is pressed against the lower end of the filter element seat 6. The internal thread of the filter element seat 6 is connected to the filter element 4. The outer sleeve of the filter element 4 is provided with a filter screen 5. The filter screen 5 adds a filtering function during hydrogenation to prevent hydrogen with impurities from entering the hydrogen storage system. The filter screen 5 is detachably connected to the filter element 4.

[0036] Furthermore, a connector sealing ring 3 is provided inside the hydrogen filling port connector 2. When the gas filling gun is inserted into the hydrogen filling port connector 2, the gas filling gun port abuts against the connector sealing ring 3, which can seal the gas filling gun and the hydrogen filling port connector 2 to prevent hydrogen leakage during the gas filling process.

[0037] Furthermore, a filter seal ring 7 is provided on the outside of the filter seat 6, and the filter seal ring 7 is used to seal between the hydrogenation port connector 2 and the filter seat 6 to prevent hydrogen from escaping from the gap between the hydrogenation port connector 2 and the filter seat 6.

[0038] Furthermore, a guide sleeve sealing ring 9 is provided inside the one-way valve guide sleeve 8 , and the guide sleeve sealing ring 9 can seal the position between the filter element seat 6 , the one-way valve guide sleeve 8 and the hydrogenation port one-way valve core 10 .

[0039] Furthermore, a bolt retaining ring 15 is provided outside the hydrogenation port connecting bolt 13, and a bolt sealing ring 14 is provided outside the hydrogenation port connecting bolt 13 and on the upper end surface of the bolt retaining ring 15. The bolt sealing ring 14 is used to seal between the hydrogenation port connector 2 and the hydrogenation port connecting bolt 13.

[0040] The use steps of the utility model are as follows: when the hydrogen filling port for the vehicle-mounted hydrogen storage tank is in use and hydrogen is added, the hydrogen reaches the filter screen 5 through the channel of the hydrogen filling port connector 2, flows into the filter element 4 after filtering the particulate impurities through the filter screen 5, and then pushes the hydrogen filling port one-way valve core 10 to enter the inner cavity of the one-way valve guide sleeve 8, and then flows into the inner cavity of the hydrogen filling port connecting bolt 13 through the small hole of the ventilation sleeve 12 and then flows into the rear-end pipeline. The hydrogen filling port purifies the hydrogen through the filter, intercepts the particulate impurities, and prevents the pollution of the fuel cell stack. At the same time, it has the function of a one-way valve to prevent the hydrogen from leaking outward. In the case that the hydrogen filling port or the hydrogen supply pipeline is damaged, the gas is prevented from leaking outward and the service life of the hydrogen filling port is increased.

[0041] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydrogen filling port for a vehicle-mounted hydrogen storage tank, comprising a hydrogen filling port cover (1) and a hydrogen filling port connector (2), characterized in that: The hydrogenation port connection head (2) is internally threadedly connected with a hydrogenation port connection bolt (13), the hydrogenation port connection bolt (13) is externally sleeved with a fixing nut (16), the fixing nut (16) is threadedly connected to the hydrogenation port connection bolt (13), the hydrogenation port connection bolt (13) is internally provided with a vent sleeve (12), the vent sleeve (12) is internally provided with a check valve spring (11), the check valve spring (11) is externally sleeved with a hydrogenation port check valve core (10), the hydrogenation port check valve core (10) is slidably connected to the vent sleeve (12). The invention relates to a hydrogenation port connector (2) and a hydrogenation port connector (10). The hydrogenation port connector (10) is slidably connected to the hydrogenation port connector (10); a filter element seat (6) is provided inside the hydrogenation port connector (2) and located on the upper end surface of the hydrogenation port connector (10); the filter element seat (6) is used in conjunction with the hydrogenation port connector (10); the filter element (4) is connected to the filter element (4) through the internal thread of the filter element seat (6); the filter screen (5) is provided on the outer sleeve of the filter element (4); and the filter screen (5) is detachably connected to the filter element (4).

2. The hydrogen filling port for a vehicle-mounted hydrogen storage tank according to claim 1, characterized in that: A connector sealing ring (3) is arranged inside the hydrogenation port connector (2).

3. The hydrogen filling port for a vehicle-mounted hydrogen storage tank according to claim 1, characterized in that: The outer sleeve of the filter element seat (6) is provided with a filter element sealing ring (7).

4. The hydrogen filling port for a vehicle-mounted hydrogen storage tank according to claim 1, characterized in that: A guide sleeve sealing ring (9) is arranged inside the one-way valve guide sleeve (8).

5. The hydrogen filling port for a vehicle-mounted hydrogen storage tank according to claim 1, characterized in that: A bolt retaining ring (15) is arranged outside the hydrogenation port connecting bolt (13), and a bolt sealing ring (14) is arranged outside the hydrogenation port connecting bolt (13) and on the upper end surface of the bolt retaining ring (15).

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