Air leakage prevention connector and hydrogen energy power generation device for outdoor operation

Abstract

The invention relates to the technical field of gas sealing, and discloses a gas leakage prevention connector and a hydrogen energy power generation device for outdoor operation. The air leakage prevention connector comprises a first connecting end and a second connecting end, a first stepped hole is formed in the first connecting end, and a first air pipe is fixed in the small-diameter part of the first stepped hole; a second stepped hole is formed in the second connecting end, a second air pipe is fixed in the small-diameter part of the second stepped hole, the second air pipe is sleeved with a sleeve, and a mounting gap is formed between the sleeve and the second air pipe; an annular air bag is arranged between the large diameter of the second stepped hole and the sleeve, an air inlet is formed in the face, close to the sleeve, of the annular air bag, a radial through hole is formed in the sleeve, and the radial through hole is communicated with the air inlet. The two connecting ends are in butt joint, the installation action of the air pipes is converted into the inflation action, the first air pipe is embedded into the installation gap, air in the installation gap is pushed to enter the annular air bag, the air pressure of the annular air bag is increased, the extrusion force on the sleeve and the first air pipe is larger, and the sealing performance is improved.

Description

Technical Field

[0001] This invention relates to the technical field of gas sealing, and in particular to a leak-proof connector and a hydrogen power generation device for outdoor operations. Background Technology

[0002] Fuel cells can directly convert the chemical energy of fuel into electrical energy, and have advantages such as high energy conversion efficiency, clean emissions, and low noise, making them a promising candidate for application in the field of new energy power generation.

[0003] With the increasing demand for portable power generation equipment in outdoor operations, emergency rescue and other scenarios, portable fuel cell generators have become the preferred solution due to their high energy density and long range. Miniaturization and lightweight design are the core requirements.

[0004] However, due to limitations in size and portability, such devices cannot be equipped with industrial-grade high-strength sealing devices. Existing lightweight sealing solutions are weak and prone to fuel gas leakage. This not only wastes fuel and reduces power generation efficiency, but may also cause safety hazards such as combustion and explosion, severely restricting the market promotion of portable fuel cell generators.

[0005] Therefore, how to improve sealing performance while meeting lightweight design requirements is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The technical problem to be solved by this invention is: how to improve sealing performance while meeting the requirements of lightweight design.

[0007] To address the aforementioned technical problems, this invention provides a leak-proof connector and a hydrogen power generation device for outdoor operations.

[0008] In a first aspect, the present invention provides an air-leakage-proof connector, comprising a first connecting end and a second connecting end; the first connecting end has a first stepped hole, and a first air tube is fixed within the small diameter of the first stepped hole; the second connecting end has a second stepped hole, and a second air tube is fixed within the small diameter of the second stepped hole, with a sleeve fitted over the end of the second air tube at the large diameter of the second stepped hole, forming an installation gap between the sleeve and the second air tube; an annular airbag is provided between the large diameter of the second stepped hole and the sleeve, with an air inlet on the side of the annular airbag near the sleeve, and a radial through hole on the sleeve communicating with the air inlet; the first connecting end and the second connecting end are joined together, and the first air tube is embedded in the installation gap, pushing the gas in the installation gap into the annular airbag.

[0009] In one embodiment, the annular airbag has an opening at one end of the stepped surface near the second stepped hole; the second connecting end has an axial through hole, one end of which is connected to the opening, and the other end of which is connected to the outside of the second connecting end; the axial through hole has a one-way sealing plate, the direction of which is from the outside of the second connecting end to the opening, and the reverse direction is cut off.

[0010] In one embodiment, the air inlet is located near the stepped surface of the second stepped hole.

[0011] In one embodiment, the outer diameter of the second connecting end is provided with a plurality of buckles, and the major diameter of the first connecting end is provided with a plurality of wedges, with each wedge corresponding to one of the buckles.

[0012] In one embodiment, an annular sealing strip is provided at the end of the first trachea.

[0013] In one embodiment, an elastic sleeve is fitted onto the end of the first trachea.

[0014] In one embodiment, a protective box is provided on the outside of the joint between the first connecting end and the second connecting end, and a gas sensor is provided inside the protective box. The gas sensor is adapted to detect the gas introduced into the leak-proof connector.

[0015] In one embodiment, the protective box has several exhaust holes, and the exhaust holes are connected to a fan.

[0016] In one embodiment, a control valve is provided between the fan and the exhaust port.

[0017] A second aspect of the present invention provides a hydrogen power generation device for outdoor operations, comprising: a housing; a hydrogen fuel cell disposed inside the housing; and a leak-proof connector as provided in the first aspect of the present invention, disposed on the housing, the leak-proof connector being used to connect the hydrogen fuel cell and a hydrogen cylinder.

[0018] Compared with existing technologies, the present invention provides a leak-proof connector and a hydrogen power generation device for outdoor operations. The advantages of this invention are as follows: Stepped holes are provided in the connector. The second air pipe in the second stepped hole and the sleeve form an installation gap, while the second air pipe in the first stepped hole is inserted into the installation gap. This cleverly transforms the installation of multiple air pipes into an inflation action. The gas in the installation gap is pushed and sequentially passes through the radial through-hole and the air inlet into the annular airbag. Because the annular airbag is surrounded by two stepped holes, its volume cannot change. Due to the increase in gas, the air pressure in the annular airbag increases, thereby improving sealing performance while meeting lightweight design requirements. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an air-leakage-proof connector, as exemplarily shown in an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the first connection end of an air-leakage-proof connector, as exemplarily shown in an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the second connection end of an air-leakage-proof connector, as exemplarily shown in an embodiment of the present invention.

[0022] Figure 4 This is another structural schematic diagram of the second connection end of an air-leakage-proof connector, as exemplarily shown in an embodiment of the present invention.

[0023] Figure 5 This is an exemplary embodiment of the present invention, showing the internal structure of a hydrogen power generation device for outdoor operations.

[0024] Figure 6 This is an exemplary schematic diagram of the external structure of a hydrogen power generation device for outdoor operations, as shown in an embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram of the structure of an external component of an air-leakage-proof connector, as exemplarily shown in an embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram of the exhaust box and fan of an air-leakage-proof connector, as exemplarily shown in an embodiment of the present invention.

[0027] Figure label: 1. Leak-proof connector; 2. Housing; 3. Hydrogen fuel cell; 11. First connection end; 12. Second connection end; 13. Protective box; 14. Fan; 15. Control valve; 16. Exhaust box; 17. Third gas pipe; 21. Exhaust port; 22. Display screen; 23. First output port; 24. Second output port; 25. Reserved mounting hole; 111. First stepped hole; 112. First gas pipe; 113. Wedge; 114. 115. Annular sealing strip; 116. Elastic sleeve; 121. Pressure-sensitive pad; 122. Second step hole; 123. Second air tube; 124. Sleeve; 125. Annular airbag; 126. Axial through hole; 131. Buckle; 132. Gas sensor; 161. Exhaust port; 162. Pressure cover; 1231. Radial through hole; 1241. Air inlet; 1242. Opening; 1251. One-way sealing plate. Detailed Implementation

[0028] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0029] It should be understood that although the terms first, second, third, etc., may be used in this invention to describe various connection ends, these connection ends should not be limited to these terms. These terms are only used to distinguish connection ends of the same type from each other. For example, without departing from the scope of this invention, a first connection end may also be referred to as a second connection end, and similarly, a second connection end may also be referred to as a first connection end. Depending on the context, the word "if" as used herein can be interpreted as "when," "when," or "in response to determination."

[0030] As a novel power generation device, fuel cells can directly convert the chemical energy of fuel into electrical energy. Compared with traditional fuel generators and lithium batteries, they have advantages such as high energy conversion efficiency, zero emissions, low operating noise, and long range, making them highly promising for application in the field of new energy power generation. With the increasing demand for outdoor exploration, emergency rescue, and backup power for mobile terminals, portable fuel cell generators are gradually becoming the core choice for portable power generation equipment due to their suitability for lightweight and miniaturized use.

[0031] However, due to its portability requirements, the overall structure of the equipment needs to be extremely compact. Traditional industrial-grade fuel cell systems use strong sealing devices such as flange seals and welded seals, which are large, heavy, and inconvenient to disassemble and assemble, and cannot meet its design requirements. Currently, the industry uses lightweight sealing solutions such as ordinary rubber gaskets and snap-fit ​​types, which have weak sealing performance and are difficult to prevent the leakage of fuel gases such as hydrogen and methanol.

[0032] Fuel gas leaks not only cause fuel loss and reduce power generation efficiency, but also pose significant safety hazards. Flammable and explosive gases can easily form explosive mixtures after leakage, while toxic gases can harm the health of operators. These problems directly restrict the large-scale promotion and market application of portable fuel cell generators.

[0033] Therefore, how to effectively improve sealing performance and reduce the risk of fuel gas leakage while taking into account the lightweight and miniaturized design of equipment has become a key technical problem that urgently needs to be solved in this field.

[0034] like Figure 1 As shown, a leak-proof connector 1 according to a preferred embodiment of the present invention includes a first connecting end 11 and a second connecting end 12.

[0035] like Figure 2 As shown, the first connecting end 11 is provided with a first stepped hole 111, and a first air tube 112 is fixed in the small diameter of the first stepped hole 111.

[0036] like Figure 3As shown, the second connecting end 12 is provided with a second stepped hole 121. A second air pipe 122 is fixed in the small diameter of the second stepped hole 121. A sleeve 123 is sleeved on one end of the second air pipe 122 at the large diameter of the second stepped hole 121, and an installation gap is formed between the sleeve 123 and the second air pipe 122.

[0037] An annular airbag 124 is provided between the large diameter of the second step hole 121 and the sleeve 123. An air inlet 1241 is provided on the side of the annular airbag 124 near the sleeve 123. A radial through hole 1231 is provided on the sleeve 123, and the radial through hole 1231 communicates with the air inlet 1241.

[0038] The first connecting end 11 and the second connecting end 12 are connected, and the first air tube 112 is embedded in the installation gap, pushing the gas in the installation gap into the annular airbag 124.

[0039] By setting stepped holes in the joints, the second air tube 122 in the second stepped hole 121 and the sleeve 123 form an installation gap, while the second air tube 122 in the first stepped hole 111 is inserted into the installation gap. This cleverly transforms the installation of multiple air tubes into an inflation action. After the gas in the installation gap is pushed, it enters the annular airbag 124 through the radial through hole 1231 and the air inlet hole 1241 in sequence. Since the annular airbag 124 is surrounded by two stepped holes, its volume cannot change. Due to the increase in gas, the air pressure of the annular airbag 124 can be increased. The increased air pressure of the annular airbag 124 exerts greater pressure on the sleeve 123 and the first air tube 112, thus improving the sealing performance. Since all the structures are in the leak-proof joint 1, they rely on air pressure rather than volume, thus also meeting the requirements of lightweight design and eliminating the need for an external air replenishment device.

[0040] The air pressure of the annular airbag 124 is increased by compressing air through the first air tube 112, which further compresses the air tube and sleeve 123 to improve the seal. However, this also introduces a new problem: the air pressure is difficult to release, making it difficult to pull out after the sealed connection.

[0041] Therefore, in a further embodiment, such as Figure 3 As shown, the annular airbag 124 has an opening 1242 at one end of the stepped surface near the second stepped hole 121. The second connecting end 12 has an axial through hole 125, one end of which communicates with the opening 1242, and the other end of which communicates with the outside of the second connecting end 12. The axial through hole 125 has a one-way sealing plate 1251, the direction of which is from the outside of the second connecting end 12 to the opening 1242, and the reverse direction is blocked.

[0042] By introducing the axial through-hole 125 and the one-way sealing plate 1251, when the first air tube 112 pushes gas into the annular airbag 124, the air pressure in the annular airbag 124 increases, and the one-way sealing plate 1251 is squeezed and closed by the annular airbag 124, thereby improving the sealing performance. When the operation is reversed to pull out, the annular airbag 124 contracts, the force on the one-way sealing plate 1251 decreases, and the high-pressure gas in the annular airbag 124 can force open the one-way sealing plate 1251 to release the pressure, thereby reducing the resistance to pulling out.

[0043] In a further embodiment of the present invention, such as Figure 4 As shown, the second air intake pipe is hidden, and the stepped surface of the air intake 1241 near the second stepped hole 121 can be seen.

[0044] Moving the air inlet 1241 closer to the stepped surface increases the stroke of the first air tube 112 in the installation gap, thus increasing the amount of gas forced into the annular airbag 124. It also reduces gas residue in the installation gap, making it difficult for compressed gas to form in the gap to resist the insertion of the first air tube 112.

[0045] Furthermore, in one embodiment of the present invention, such as Figure 1 As shown, the outer diameter of the second connecting end 12 may be provided with a number of buckles 126, and the major diameter of the first connecting end 11 is provided with a number of wedges 113, with each wedge 113 corresponding to a buckle 126.

[0046] Based on the compression of the annular airbag 124, the wedge block 113 and the buckle 126 are further added to achieve double insurance of mechanical limit and friction limit, reducing the probability of the first connecting end 11 and the second connecting end 12 disengaging.

[0047] In embodiments of the present invention, such as Figure 2 As shown, an annular sealing strip 114 may also be provided at the end of the first air tube 112. The elastic annular sealing strip 114 can fill the gap between the first air tube 112 and the sleeve 123, reduce air leakage, improve the efficiency of pressing gas into the annular airbag 124, and the annular sealing strip 114, together with the annular airbag 124, can achieve multiple elastic compression, further increase the friction, and reduce the possibility of the first connecting end 11 and the second connecting end 12 disengaging.

[0048] Understandable, Figure 2The annular sealing strip 114 shown is exemplified by being positioned on the outer side of the first air tube 112. In another embodiment, the annular sealing strip 114 can also be positioned on the inner side of the first air tube 112, allowing it to fill the gap between the first air tube 112 and the second air tube 122, reducing air leakage. This also compresses the first air tube 112 against the sleeve 123, achieving a seal and improving the efficiency of pressurizing gas into the annular airbag 124. Both embodiments, and solutions obtained without invention, fall within the protection scope of this invention.

[0049] However, the contact area of ​​the annular sealing strip 114 is ultimately small and difficult to provide stable support. Therefore, in a further embodiment of the present invention, an elastic sleeve 115 is fitted at the end of the first air tube 112.

[0050] Thanks to the above embodiments, the elastic sleeve 115 is fitted onto the first air pipe 112, which can compensate for the small contact area of ​​the annular sealing strip 114 and improve stability.

[0051] Furthermore, in one embodiment of the present invention, the annular sealing strip 114 can be fixed to the outside of the first air tube 112, and the outer diameter of the elastic sleeve 115 can be less than or equal to the outer diameter of the annular sealing strip 114. In this way, when inserted, the fixed annular sealing strip 114 bears most of the axial compressive force, while the elastic sleeve 115 is subjected to a smaller axial force, so there will be no large degree of axial displacement, ensuring the positioning accuracy of the elastic sleeve 115 on the first air tube 112.

[0052] When the elastic sleeve 115 enters the installation gap, it is subjected to radial compression, just like the annular sealing strip 114, and participates in the sealing between the first air pipe 112 and the sleeve 123.

[0053] In another embodiment of the invention, such as Figure 2 As shown, a pressure-sensitive pad 116 can be set inside the first connecting end 11. When the first air tube 112 is inserted into the installation gap, the first connecting end 11 and the second connecting end 12 squeeze the pressure-sensitive pad 116 to achieve the airtightness of the first connecting end 11 and the second connecting end 12 on the periphery. Together with the internal annular airbag 124 and other sealing structures, the entire leak-proof connector 1 is sealed.

[0054] The pressure-sensitive pad 116 is made of elastic material, specifically rubber, polyurethane foam, pressure-sensitive adhesive composite material, etc.

[0055] In one embodiment, a composite material with an adhesive coating on one side and an elastic substrate on the other can be used, which can be directly glued and fixed, making assembly convenient.

[0056] Furthermore, to adapt to application scenarios involving flammable, explosive, and harmful gases, in one embodiment of the present invention, such as... Figure 7 As shown, a protective box 13 is provided on the outside of the joint between the first connecting end 11 and the second connecting end 12. A gas sensor 131 is provided inside the protective box 13. The gas sensor 131 is adapted to detect the gas introduced into the leak-proof connector 1.

[0057] By providing a protective box 13 on the outside of the first connection end 11 and the second connection end 12, and providing a gas sensor 131 inside the protective box 13, a leak can be quickly detected when it occurs between the first connection end 11 and the second connection end 12.

[0058] The above embodiments of the present invention do not limit specific gas types and subsequent signal processes.

[0059] For example, the gas can be hydrogen, and the corresponding gas sensor 131 is a hydrogen sensor. Alternatively, in other embodiments, other gases can be used, such as liquefied petroleum gas or natural gas, and the type of gas sensor 131 will depend on the actual gas type.

[0060] In addition, after the gas sensor 131 detects the target gas, it can trigger further signal processes, such as alarm, pressure relief, ventilation, etc.

[0061] As in the exemplary embodiments of the present invention, such as Figure 7 As shown, the protective box 13 has several exhaust holes 132, and the exhaust holes 132 are connected to a fan 14.

[0062] By connecting the fan 14 to the exhaust port 132, the leaked target gas in the protective box 13 can be quickly discharged. It is understood that the fan 14 can be continuously running, or it can be started based on the signal from the gas sensor 131 in the aforementioned embodiment.

[0063] For example, if the leak-proof connector 1 of the present invention is used in a fixed location and there is sufficient power, the fan 14 can be continuously turned on. However, if the leak-proof connector 1 of the present invention is used in a mobile scenario or other scenario where there is no sensitivity to power consumption, the fan 14 can be started only when the gas sensor 131 detects the target gas.

[0064] Furthermore, in embodiments of the present invention, such as Figure 7 As shown, the protective box 13 can also be connected to the exhaust box 16. The exhaust box 16 contains several pressurized hoods 161, each corresponding to and connected to an exhaust port 132. The exhaust box 16 is also connected to a fan 14. When the fan 14 starts, it carries gas from the protective box 13 to the exhaust box 16, and then discharges the gas. When the gas flows through the pressurized hoods 161, it forms a directional pressurized airflow, forcibly converging the dispersed target gas to the exhaust port 132, reducing the diffusion range and improving emission efficiency.

[0065] Furthermore, without the pressure hood 161, the scattered gas is easily affected by the ambient airflow, forming eddies or dead zones in the protective box 13, resulting in some target gas not being effectively discharged. The airflow guiding structure of the pressure hood 161 can regulate the airflow path, counteract the interference of the external airflow, and ensure that the target gas scattered in various places can be drawn into the exhaust box 16.

[0066] Specifically, the pressure hood 161 can adopt a conical hood opening, with the small diameter end of the conical hood opening connected to the exhaust port 132, and the large diameter end of the conical hood opening facing the interior of the exhaust box 16.

[0067] In another embodiment, the pressure shroud 161 may be a baffle plate, with several baffle plates stacked into a conical structure, and a larger opening 1242 facing the interior of the exhaust box 16.

[0068] In a further embodiment of the present invention, a control valve 15 may be provided between the fan 14 and the exhaust port 132. By introducing the control valve 15, the flow of air can be actively controlled and the exhaust process can be actively intervened to adapt to the usage requirements of special working conditions. For example, if the external environment of the equipment is sensitive, the exhaust needs to be temporarily shut off to avoid affecting the external environment.

[0069] In one embodiment of the present invention, such as Figure 8 As shown, the exhaust box 16 and the fan 14 can be connected by an exhaust pipe 162, and the control valve 15 can be installed on the exhaust pipe 162.

[0070] Corresponding to the leak-proof connector 1, such as Figure 6 As shown, the present invention also provides a hydrogen power generation device for outdoor operations, comprising: a housing 2, a hydrogen fuel cell 3, and a leak-proof connector 1 as in any embodiment of the present invention. The hydrogen fuel cell 3 is disposed inside the housing 2, the leak-proof connector is disposed on the housing 2, and the leak-proof connector 1 is used to connect the hydrogen fuel cell 3 and the hydrogen cylinder.

[0071] By installing a leak-proof connector 1 in the hydrogen power generation device, the sealing requirements between the hydrogen cylinder and the hydrogen fuel cell 3 can be met while satisfying the portability requirements for outdoor operations.

[0072] Since the hydrogen power generation device of the present invention includes all the technical features of the anti-leakage connector 1, all embodiments of the anti-leakage connector 1 of the present invention and the beneficial effects of the embodiments are applicable to the hydrogen power generation device of the present invention.

[0073] It is understood that the above embodiments can be freely combined without conflict, whether in the leak-proof connector 1 or in the hydrogen power generation device.

[0074] For example, the sealing structures such as the annular sealing strip 114, elastic sleeve 115, pressure-sensitive pad 116, and annular airbag 124 in the leak-proof connector 1 can be used simultaneously. Similarly, leak-proof structures such as the protective box 13, fan 14, control valve 15, and exhaust box 16 can also be used simultaneously. Many other combinations are not shown here; each embodiment can be freely combined, and the resulting solutions also fall within the protection scope of this invention.

[0075] Furthermore, in embodiments of the present invention, various components can be installed on the housing 2, such as... Figure 5 In the illustrated embodiment, an exhaust vent 21 may be provided on the housing 2 of the present invention, and the position of the exhaust vent 21 corresponds to the position of the fan 14. Furthermore, in a further embodiment, one or more of the following may be selectively provided: a display screen 22, a first output port 23, a second output port 24, and a reserved mounting hole 25.

[0076] It is understood that the first output port 23 and the second output port 24 can be any type of power output port. For example, as shown in the figure, the first output port 23 is a 220V AC output socket, while the second output port 24 is a Type-C interface for use by mobile terminals.

[0077] Various devices can be installed in the reserved mounting hole 25. For example, in one embodiment, a DC output port can be provided in the reserved mounting hole 25 to temporarily supply power to routers, switches, and other electrical equipment. In another embodiment, an indicator light can be provided in the reserved mounting hole 25 to indicate the operating status of the hydrogen fuel cell 3 or the output port.

[0078] It is understood that, in order to meet more functional requirements, multiple reserved mounting holes 25 can be provided to install various components. This invention does not limit them one by one. All improvements made based on the structure of this invention fall within the protection scope of this invention.

[0079] In summary, this invention provides a leak-proof connector 1 and a hydrogen power generation device for outdoor operations. It guides the air pressure of the gas pipe and sleeve 123 through stepped holes, achieving a dual function of maintaining air pressure sealing and gas transmission. This structure, through the cooperation of the radial through-hole 1231 and the air inlet 1241, allows for efficient gas transmission to the annular airbag 124, ensuring superior sealing compared to traditional methods. Simultaneously, the cooperation of the elastic sleeve 115 and the annular sealing strip 114 achieves a balance between airtightness and lightweight structure, eliminating the need for an external air supply device. Furthermore, the introduction of the axial through-hole 125 and the one-way sealing plate 1251 realizes a dual sealing mechanism of air pressure release and reverse pull-out. Simultaneously, the linkage between the protective box 13 and the gas sensor 131 enables leak detection and rapid ventilation. This technical solution balances sealing performance with lightweight structure and practicality, providing an efficient and reliable design path for the engineering implementation of the leak-proof connector 1.

[0080] The pneumatically driven structure of the annular airbag 124 in this embodiment of the invention provides superior sealing compared to traditional methods. Simultaneously, the radial through-hole 1231 and air inlet 1241 enable efficient gas transfer, ensuring continuous pressure maintenance of the sealed state. The cooperation between the elastic sleeve 115 and the annular sealing strip 114 achieves a balance between airtightness and structural compactness, eliminating the need for an external air supply device. The introduction of the axial through-hole 125 and the one-way sealing plate 1251 provides a dual sealing mechanism for pressure release and reverse pull-out. Furthermore, the linkage between the protective box 13 and the gas sensor 131 enables leakage monitoring and rapid ventilation.

[0081] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A leak-proof connector, characterized in that, Includes a first connecting end (11) and a second connecting end (12); The first connecting end (11) is provided with a first stepped hole (111), and a first air tube (112) is fixed in the small diameter of the first stepped hole (111). The second connecting end (12) is provided with a second stepped hole (121), and a second air tube (122) is fixed in the small diameter of the second stepped hole (121). A sleeve (123) is fitted at one end of the second air tube (122) at the large diameter of the second stepped hole (121), and an installation gap is formed between the sleeve (123) and the second air tube (122). An annular airbag (124) is provided between the major diameter of the second stepped hole (121) and the sleeve (123). An air inlet (1241) is provided on the side of the annular airbag (124) near the sleeve (123). A radial through hole (1231) is provided on the sleeve (123), and the radial through hole (1231) communicates with the air inlet (1241). The first connecting end (11) and the second connecting end (12) are connected, and the first air tube (112) is embedded in the installation gap, pushing the gas in the installation gap into the annular airbag (124).

2. The leak-proof connector (1) according to claim 1, characterized in that: The annular airbag (124) has an opening (1242) at one end of the stepped surface near the second stepped hole (121). The second connecting end (12) is provided with an axial through hole (125), one end of the axial through hole (125) is connected to the opening (1242), and the other end of the axial through hole (125) is connected to the outside of the second connecting end (12); The axial through hole (125) is provided with a one-way sealing plate (1251), and the conduction direction of the one-way sealing plate (1251) is from the outside of the second connecting end (12) to the opening (1242), and the reverse direction is cut off.

3. The leak-proof connector according to claim 1, characterized in that, The air inlet (1241) is close to the stepped surface of the second stepped hole (121).

4. The leak-proof connector according to claim 1, characterized in that, The outer diameter of the second connecting end (12) is provided with several buckles (126), and the large diameter of the first connecting end (11) is provided with several wedges (113), and the wedges (113) correspond one-to-one with the buckles (126).

5. The leak-proof connector according to claim 1, characterized in that, The end of the first trachea (112) is provided with an annular sealing strip (114).

6. The leak-proof connector according to claim 5, characterized in that, An elastic sleeve (115) is fitted at the end of the first trachea (112).

7. The leak-proof connector according to claim 1, characterized in that, A protective box (13) is provided on the outside of the joint between the first connecting end (11) and the second connecting end (12). A gas sensor (131) is provided inside the protective box (13). The gas sensor (131) is adapted to detect the gas introduced into the leak-proof connector (1).

8. The leak-proof connector according to claim 7, characterized in that, The protective box (13) has several exhaust holes (132), and the exhaust holes (132) are connected to a fan (14).

9. The leak-proof connector according to claim 8, characterized in that, A control valve (15) is provided between the fan (14) and the exhaust port (132).

10. A hydrogen power generation device for outdoor operations, characterized in that, include: Box (2); Hydrogen fuel cell (3), wherein the hydrogen fuel cell (3) is disposed inside the housing (2); The leak-proof connector (1) as described in any one of claims 1-9 is provided on the housing (2) and is used to connect the hydrogen fuel cell (3) and the hydrogen cylinder.

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