Hydrogen exchange pipeline quick-change automatic connecting mechanism

Abstract

The invention discloses a hydrogen exchange pipeline quick-change automatic connecting mechanism, and relates to the field of vehicle hydrogen exchange, the hydrogen exchange pipeline quick-change automatic connecting mechanism comprises a mounting seat arranged on a hydrogen supply module and a base arranged on a vehicle-mounted bracket, a shell main body is arranged between the mounting seat and the base, the mounting seat is provided with a plug-in assembly used for being plugged in the shell main body, and the plug-in assembly is arranged on the base. The shell body is provided with a locking mechanism used for locking the plug-in assembly, the shell body is further provided with an unlocking mechanism used for unlocking the plug-in assembly, a one-way valve is arranged in the shell body, the one-way valve is communicated with a connecting pipe, and the connecting pipe is communicated with the plug-in assembly. And the connecting pipe is provided with a control piece for controlling hydrogenation or hydrogen-oxygen mixture discharge operation. The hydrogen exchange pipeline can be rapidly and automatically connected and separated, hydrogenation and hydrogen discharge operation can be conveniently controlled, the locking state can be visually observed, and the convenience and safety of hydrogen conveying connection are improved.

Description

Technical Field

[0001] This application relates to the field of hydrogen swapping for vehicles, and in particular to a quick-connect automatic connection mechanism for hydrogen swapping pipelines. Background Technology

[0002] In the development of hydrogen fuel cell vehicles, the onboard hydrogen system, as a core component, plays a crucial role in the promotion and application of these vehicles through its connection to the vehicle and the replacement of hydrogen. A good connection method and efficient gas replacement techniques can improve the efficiency of hydrogen fuel cell vehicles, reduce operating costs, and enhance their safety and reliability, which is of great significance for promoting the development of the hydrogen fuel cell vehicle industry.

[0003] In existing technologies, the connection between the on-board hydrogen system and the vehicle typically uses a compression fitting, which is a one-time permanent connection. During traditional hydrogen system replacement processes, when residual air in the medium-pressure pipeline forms a hydrogen-oxygen mixture, due to the inherent danger, the hydrogen replacement and venting operation is performed manually by controlling a shut-off valve.

[0004] However, existing technologies have significant drawbacks. Repeated insertion and removal of the compression fitting can lead to wear and leakage. Furthermore, the traditional method of manually controlling the shut-off valve for hydrogen replacement and venting is not only inefficient but also poses certain safety hazards. Summary of the Invention

[0005] In order to improve the problems of the existing technology that the ferrule connector cannot be repeatedly inserted and removed, and the low efficiency and poor safety of the manual operation of the shut-off valve for hydrogen replacement, this application provides a quick-change automatic connection mechanism for hydrogen replacement pipeline.

[0006] The quick-change automatic connection mechanism for hydrogen exchange pipelines provided in this application adopts the following technical solution: An automatic quick-change connection mechanism for hydrogen exchange pipelines includes a mounting base on a hydrogen supply module and a base on a vehicle bracket. A housing body is disposed between the mounting base and the base. The mounting base is provided with a plug-in component for plugging into the housing body. The housing body is provided with a locking mechanism for locking the plug-in component and an unlocking mechanism for unlocking the plug-in component. A one-way valve is disposed inside the housing body, and a connecting pipe is connected to the one-way valve. A control component for controlling the operation of hydrogen addition or hydrogen-oxygen mixture discharge is disposed on the connecting pipe.

[0007] By adopting the above technical solution, when connecting the hydrogen supply module to the vehicle bracket, the plug-in component is inserted into the main body of the housing, and the locking mechanism automatically locks it, ensuring a secure connection and preventing loosening or detachment. When disconnecting, the unlocking mechanism quickly unlocks and separates the connection. Simultaneously, a one-way valve inside the main body of the housing ensures unidirectional gas flow, preventing backflow. The control components precisely control the hydrogen-oxygen mixture in the pipeline for adding or removing hydrogen, improving efficiency and eliminating potential hazards.

[0008] Optionally, the plug-in assembly includes a guide sleeve and a plug-in component. The guide sleeve is fixed on the mounting base, and the plug-in component is fixed on the guide sleeve. The plug-in component and the locking mechanism form a snap-fit ​​engagement.

[0009] By adopting the above technical solution, when connecting the hydrogen supply module to the vehicle bracket, the guide sleeve guides the connector, ensuring its smooth insertion into the outer shell. When the outer bevel of the connector contacts the locking mechanism, it buffers and guides the connector, allowing it to smoothly engage in the locking mechanism and lock the connector in place.

[0010] Optionally, the connector includes a first sleeve and a second sleeve. The first sleeve is fixed on the guide sleeve. The two ends of the first sleeve are respectively fixed to the guide sleeve and the second sleeve. The second sleeve forms a snap-fit ​​engagement with the locking mechanism, and the side wall of the second sleeve is provided with an arc-shaped bevel.

[0011] By adopting the above technical solution, when the plug is inserted into the locking mechanism, the arc-shaped inclined surface on the outer side of the second sleeve contacts the locking mechanism first, which can play a buffering and guiding role, so that the second sleeve can be smoothly inserted into the locking mechanism, and a stable connection between the hydrogen supply module and the vehicle bracket is completed.

[0012] Optionally, the locking mechanism includes a mounting hole, a locking claw, an elastic element, and a slot. The mounting hole is formed on the outer shell body, the locking claw is hinged to the mounting hole, the two ends of the elastic element are fixed to the outer shell body and the locking claw respectively, the slot is formed on the side of the locking claw facing the one-way valve, and the slot forms a snap-fit ​​with the second sleeve. A stop block is fixed on the locking claw.

[0013] By adopting the above technical solution, the locking claw and the plug-in are engaged to achieve automatic connection between the hydrogen supply module and the vehicle bracket. The elastic element ensures that the locking claw and the plug-in are stably engaged, and the stop block and the unlocking mechanism work together to unlock the plug-in component.

[0014] Optionally, the side of the locking claw that abuts against the connector is angled.

[0015] By adopting the above technical solution, the locking claw and the side of the connector that abuts are set at an angle, so that when the connector is inserted, the locking claw can be pushed to rotate outward more smoothly, which makes it easier for the connector to be inserted into the housing body and form a locking engagement with the locking mechanism.

[0016] Optionally, the unlocking mechanism includes a driving component and a movable housing. The driving component is fixed on the base, and the output end of the driving component is fixed to the movable housing. A protrusion is fixed on the inner wall of the movable housing. When the driving component moves the movable housing, the protrusion abuts against the stop block, causing the locking claw to rotate outward to unlock the second sleeve.

[0017] By adopting the above technical solution, when the driving component moves the movable housing, the protrusion on the inner wall of the movable housing abuts against the stop on the locking claw, and the inclined surface cooperation causes the locking claw to rotate outward, thereby unlocking the plug-in component.

[0018] Optionally, the driving component is a multi-position cylinder, and the piston rods of the multi-position cylinder are all fixed on the movable housing.

[0019] By adopting the above technical solution, the piston rod of the multi-position cylinder is fixed on the movable outer shell as a driving component, which can drive the movable outer shell to move.

[0020] Optionally, the control component is a three-way solenoid valve. The first port of the three-way solenoid valve is connected to a connecting pipe, the second port of the three-way solenoid valve is connected to a vehicle hydrogen refueling pipe, and the third port of the three-way solenoid valve is connected to an exhaust pipe. By controlling the three-way solenoid valve, the operation of hydrogen refueling and venting hydrogen-oxygen mixture in the pipeline can be realized.

[0021] By adopting the above technical solution, the first, second, and third ports of the three-way solenoid valve are connected to the connecting pipe, the vehicle hydrogen refueling pipe, and the exhaust pipe, respectively. By precisely controlling the opening and closing state of the three-way solenoid valve, the pipeline connection can be flexibly switched, thereby smoothly realizing the hydrogen refueling process and the operation of discharging the hydrogen-oxygen mixture, improving the working efficiency and operational convenience of the entire hydrogen exchange pipeline quick-change automatic connection mechanism.

[0022] Optionally, the movable housing is provided with a through hole, which corresponds to the position of the locking claw, and the locking or unlocking status of the locking claw can be easily observed through the through hole.

[0023] By adopting the above technical solution, a visual window is provided, which allows operators to quickly confirm whether the connection mechanism has been correctly locked or completely disengaged, thus enhancing operational safety.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The plug-in mechanism on the hydrogen supply module is connected to the base on the vehicle bracket through the outer shell. The locking and unlocking mechanisms enable quick-change automatic connection, avoiding the use of ferrule connectors and solving the problem of wear and leakage caused by repeated plugging and unplugging of ferrule connectors. 2. The control unit automatically performs hydrogen replacement and discharge of the hydrogen-oxygen mixture, eliminating the need for manual operation, thus improving the effectiveness and efficiency of the operation and reducing safety hazards. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is an installation diagram of the hydrogen supply module and the vehicle bracket provided in the embodiments of this application; Figure 2 This is provided in the embodiments of this application. Figure 1 Enlarged view of point A in the middle; Figure 3 This is an overall schematic diagram of the quick-change automatic connection mechanism provided in the embodiments of this application; Figure 4 This is a cross-sectional view of the check valve provided in the embodiment of this application; Figure 5 This is a schematic diagram of the structure of the plug-in assembly provided in the embodiments of this application; Figure 6 This is a cross-sectional view of the outer casing provided in an embodiment of this application, used to illustrate the locking mechanism; Figure 7 This is a cross-sectional view of the movable housing provided in the embodiments of this application, used to show the protrusion.

[0027] Reference numerals: 1. Mounting base; 2. Base; 3. Housing body; 4. Plug-in assembly; 5. Locking mechanism; 6. Unlocking mechanism; 7. One-way valve; 8. Connecting pipe; 9. Control component; 10. Guide sleeve; 11. Plug-in component; 12. First sleeve; 13. Second sleeve; 14. Mounting hole; 15. Locking claw; 16. Elastic component; 17. Slot; 18. Stop; 19. Drive component; 20. Movable housing; 21. Protrusion; 22. Vehicle hydrogen refueling pipe; 23. Exhaust pipe; 24. Through hole; 25. Hydrogen supply module; 26. Vehicle bracket. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0029] This application discloses a quick-change automatic connection mechanism for hydrogen exchange pipelines.

[0030] Reference Figures 1 to 3 An automatic quick-change connection mechanism for hydrogen exchange pipelines includes a mounting base 1, a housing body 3, a base 2, a plug-in assembly 4, a locking mechanism 5, and an unlocking mechanism 6. The mounting base 1 is installed at the bottom of the hydrogen supply module 25, the plug-in assembly 4 is fixed to the mounting base 1, and the base 2 is fixedly installed on the top of the vehicle-mounted bracket 26, providing support and a mounting foundation for the entire connection mechanism. The housing body is located between the plug-in assembly 4 and the base 2, and both the locking mechanism 5 and the unlocking mechanism 6 are located on the housing body 3.

[0031] Reference Figures 1 to 3 When connecting the hydrogen supply module 25 to the vehicle bracket 26, the new hydrogen supply module 25 is moved to the top of the vehicle bracket 26 using a hoisting device. Then, the new hydrogen supply module 25 is slowly lowered, allowing the connector 4 to be inserted into the housing body 3. The locking mechanism 5 automatically locks the connector 4 onto the housing body 3, ensuring a secure connection and preventing loosening or detachment. Finally, the locking mechanism locks the vehicle bracket 26 and the new hydrogen supply module 25 together, effectively preventing the hydrogen supply module 25 from shaking or shifting due to bumps during vehicle operation, thus ensuring driving safety.

[0032] Reference Figures 1 to 3 When the hydrogen supply module 25 needs to be replaced, the unlocking mechanism 6 comes into play. The operator only needs to trigger the relevant parts of the unlocking mechanism 6, and the locking mechanism 5 will release the locking state of the plug-in component 4. Then the locking mechanism between the vehicle bracket 26 and the hydrogen supply module 25 is unlocked. Finally, the hydrogen supply module 25 is lifted steadily with the help of the hoisting device and separated from the vehicle bracket 26, completing the disassembly process.

[0033] Reference Figure 3 and Figure 4 Inside the main body 3, a one-way valve 7 is also installed. A connecting pipe 8 is connected to the one-way valve 7, and a control component 9 is installed on the connecting pipe 8. Operating the control component 9 enables rapid automatic connection of the hydrogen exchange pipeline and automatic control of hydrogen addition and discharge, improving the efficiency and safety of hydrogen exchange. The one-way valve 7 prevents hydrogen backflow, ensuring the normal operation of the entire hydrogen exchange pipeline system.

[0034] It is known that the hydrogen supply module 25 includes a hydrogen storage pipe, which stores high-pressure hydrogen gas. A pressure reducing system is installed at the inlet of the hydrogen storage pipe to reduce the pressure of the high-pressure hydrogen gas and finally release medium-pressure hydrogen gas to meet subsequent usage requirements.

[0035] Reference Figure 3 and Figure 4After the plug-in component 4 is fully inserted and locked by the locking mechanism 5, the solenoid valve inside the hydrogen supply module 25 is opened, thereby releasing the medium-pressure hydrogen gas inside the hydrogen supply module 25. After the medium-pressure hydrogen gas is released, it will exert pressure on the valve core of the one-way valve 7, pushing the valve core to compress the valve core spring, causing the one-way valve 7 to open, and the medium-pressure hydrogen gas will enter the connecting pipe 8 through the one-way valve 7.

[0036] When the solenoid valve inside the hydrogen supply module 25 is closed, the release of medium-pressure hydrogen will stop, and the valve core of the one-way valve 7 will be reset under the action of the valve core spring, thus closing the one-way valve 7 to prevent hydrogen backflow and ensure the normal operation of the entire hydrogen exchange pipeline system.

[0037] During the insertion of the connector 4 of the hydrogen supply module 25 into the outer casing 3, a small amount of air enters the outer casing 3. This air mixes with hydrogen to form a hydrogen-oxygen mixture. If the concentration of this mixture reaches a certain level, it is highly susceptible to explosion upon contact with an open flame or high temperature, posing a serious safety hazard. Therefore, it is necessary to remove this small amount of hydrogen-oxygen mixture.

[0038] Reference Figure 5 The control component 9 is a three-way solenoid valve. The first port of the three-way solenoid valve is connected to the connecting pipe 8, the second port is connected to the vehicle's hydrogen refueling pipe 22, and the third port is connected to the exhaust pipe 23. By controlling the three-way solenoid valve, automatic control of hydrogen refueling or the discharge of the hydrogen-oxygen mixture can be achieved.

[0039] Reference Figure 3 and Figure 5 When a small amount of hydrogen-oxygen mixture needs to be discharged, the three-way solenoid valve is controlled to connect its first port to its third port while simultaneously closing the second port. At this time, the hydrogen-oxygen mixture accumulated inside the outer casing 3 will sequentially enter the exhaust pipe 23 through the connecting pipe 8 and the third port of the three-way solenoid valve, and will eventually be safely discharged to the outside of the system.

[0040] The above operation is repeated multiple times until the hydrogen-oxygen mixture remaining inside the outer casing 3, the one-way valve 7, and the connecting pipe 8 is completely discharged. This process, through automated control, effectively avoids the tediousness and potential risks of manual operation, while ensuring the safety of the hydrogen exchange operation.

[0041] When hydrogen refueling is required, the three-way solenoid valve is controlled to connect the first port to the second port and close the third port. Medium-pressure hydrogen can then smoothly enter the vehicle's hydrogen refueling pipe 22 through the connecting pipe 8 and the three-way solenoid valve to complete the hydrogen refueling operation.

[0042] Reference Figure 3 and Figure 5The insertion assembly 4 includes a guide sleeve 10 and an insertion piece 11. The guide sleeve 10 is fixed to the bottom of the mounting base 1 and serves to guide the insertion direction. The insertion piece 11 is fixed to the guide sleeve 10.

[0043] Reference Figure 5 The connector 11 includes a first sleeve 12 and a second sleeve 13, wherein the first sleeve 12 is a straight cylinder and the second sleeve 13 is a tapered sleeve. The first sleeve 12 is fixed on the guide sleeve 10, and the two ends of the second sleeve 13 are fixed to the guide sleeve 10 and the second sleeve 13, respectively.

[0044] Reference Figure 5 The connector 11 includes a first sleeve 12 and a second sleeve 13, wherein the first sleeve 12 is a straight cylinder and the second sleeve 13 is a tapered sleeve. The first sleeve 12 is fixed on the guide sleeve 10, and one end of the second sleeve 13 is fixed to the first sleeve 12, while the other end is a free end.

[0045] Reference Figure 5 The second sleeve 13 and the first sleeve 12 form a right-angled stepped structure, and the diameter of the side of the first sleeve 12 closer to the guide sleeve 10 is larger than the diameter of the side farther away from the guide sleeve 10. The outer wall of the second sleeve 13 is an arc-shaped bevel. When the plug-in assembly 4 is inserted into the outer shell body 3, the bevel of the second sleeve 13 facilitates a snap-fit ​​engagement with the locking mechanism 5.

[0046] Reference Figure 3 and Figure 5 In order to increase the stability of the connection between the guide sleeve 10 and the outer shell body 3, multiple sets of locking mechanisms 5 are provided, and the multiple sets of locking mechanisms 5 are evenly distributed around the circumference of the outer shell body 3 to lock different positions of the second sleeve 13.

[0047] Reference Figure 5 and Figure 6 The locking mechanism 5 includes a mounting hole 14, a locking claw 15, and an elastic element 16. The mounting hole 14 is formed in the housing body 3, providing space for the locking claw 15 to be installed and moved. The locking claw 15 is hinged to the mounting hole 14 by a pin, allowing it to rotate around the hinge point. The two ends of the elastic element 16 are fixed to the housing body 3 and the locking claw 15, respectively. In this embodiment, the elastic element 16 is preferably a spring, which holds the locking claw 15 in a certain position.

[0048] Reference Figure 5 and Figure 6 The locking mechanism 5 also includes a slot 17, which is located on the side of the locking claw 15 facing the one-way valve 7. The slot 17 engages with the stepped part of the plug-in component 11 to lock the plug-in component 4.

[0049] Reference Figure 5 and Figure 7 Each locking claw 15 has a stop 18 fixed on the side opposite to the one-way valve 7. The stop 18 cooperates with the unlocking mechanism 6 to facilitate the subsequent unlocking of the plug-in component 4 through the unlocking mechanism 6.

[0050] Reference Figure 5 and Figure 6 When the plug-in assembly 4 is inserted into the outer shell body 3, the outer wall of the second sleeve 13 presses against the locking claw 15, pushing the locking claw 15 to rotate outward. During the outward rotation of the locking claw 15, the locking claw 15 compresses the elastic element 16, and the elastic element 16 is compressed.

[0051] Reference Figure 5 and Figure 6 When the plug-in assembly 4 moves down into place, the stepped part of the second sleeve 13 moves to be flush with the slot 17. At this time, the second sleeve 13 no longer squeezes the locking claw 15. Under the reset action of the elastic element 16, the elastic element 16 pulls the locking claw 15 to rotate inward around the hinge point, so that the slot 17 and the step of the second sleeve 13 form a locking, thereby locking the plug-in assembly 4 and completing the connection of the hydrogen exchange pipeline.

[0052] Reference Figure 6 The inner edge of the locking claw 15 that contacts the second sleeve 13 is set with a bevel. This bevel abuts against the arc-shaped bevel of the side wall of the second sleeve 13, which facilitates the insertion of the connector 11 to push the locking claw 15 to rotate outward, and then achieves locking under the action of the elastic member 16.

[0053] Reference Figure 4 , Figure 5 and Figure 7 The unlocking mechanism 6 includes a drive component 19 and a movable housing 20. The drive component 19 is fixed on the base 2, and the movable housing 20 is disposed outside the housing body 3, with the output end of the drive component 19 fixed to the movable housing 20.

[0054] Reference Figure 7 The driving component 19 is a multi-position cylinder, and the piston rod of the multi-position cylinder is fixed on the movable housing 20. The movement of the multi-position cylinder can drive the movable housing 20 to move on the housing body 3.

[0055] Reference Figure 7 A protrusion 21 is fixed on the inner wall of the movable outer shell 20, and the protrusion 21 and the adjacent side of the stop block 18 are both set at an angle. The number of protrusions 21 is consistent with the number of locking claws 15.

[0056] Reference Figure 3 and Figure 7In this embodiment, when unlocking is required, the piston rod of the multi-position cylinder drives the movable housing 20 to move closer to the base 2, so that the multiple protrusions 21 on the movable housing 20 press against the multiple stops 18 one by one and compress the elastic element 16, causing the multiple locking claws 15 to rotate outward at the same time, thereby causing the slot 17 to disengage from the step of the second sleeve 13, thereby releasing the lock on the plug-in assembly 4.

[0057] Reference Figure 5 and Figure 7 A through hole 24 is provided on the movable housing 20, and the through hole 24 corresponds to the position of the locking claw 15. On the one hand, the through hole 24 facilitates observation of the locked or unlocked state of the locking claw 15; on the other hand, the through hole 24 provides clearance for the rotation of the locking claw 15, so that the movable housing 20 will not affect the rotation of the locking claw 15, ensuring the normal use of the locking mechanism 5.

[0058] The implementation principle of the quick-change automatic connection mechanism for hydrogen replacement pipeline in this application embodiment is as follows: When connecting the hydrogen supply module 25, the plug-in component 4 is inserted into the outer shell body 3. The second sleeve 13 of the plug-in component 11 squeezes the locking claw 15, causing it to rotate outward and compressing the elastic element 16. After the plug-in component 4 moves into place, the plug-in component 11 no longer squeezes the locking claw 15, and the elastic element 16 resets, causing the locking claw 15 to rotate inward. Automatic locking is achieved by engaging the groove 17 with the step of the plug-in component 11. When replacing the hydrogen supply module 25, the multi-position cylinder drives the movable outer shell 20 to move. The protrusion 21 squeezes the stop block 18, causing the locking claw 15 to rotate outward, thereby unlocking the plug-in component 4. Hydrogen replacement and hydrogen-oxygen mixture discharge are automatically performed by the control component 9, eliminating the need for manual operation, improving the effectiveness and efficiency of the operation, and reducing safety hazards.

[0059] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "an," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar terms mean that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A quick-change automatic connection mechanism for hydrogen exchange pipelines, characterized in that: The device includes a mounting base (1) on the hydrogen supply module (25) and a base (2) on the vehicle bracket (26). A housing body (3) is provided between the mounting base (1) and the base (2). A plug-in assembly (4) for plugging into the housing body (3) is provided on the mounting base (1). A locking mechanism (5) for locking the plug-in assembly (4) is provided on the housing body (3). An unlocking mechanism (6) for unlocking the plug-in assembly (4) is also provided on the housing body (3). A one-way valve (7) is provided inside the housing body (3). A connecting pipe (8) is connected to the one-way valve (7). A control component (9) for controlling the operation of hydrogen addition or hydrogen-oxygen mixture discharge is provided on the connecting pipe (8).

2. The quick-change automatic connection mechanism for hydrogen exchange pipelines according to claim 1, characterized in that: The plug-in assembly (4) includes a guide sleeve (10) and a plug-in component (11). The guide sleeve (10) is fixed on the mounting base (1), and the plug-in component (11) is fixed on the guide sleeve (10). The plug-in component (11) and the locking mechanism (5) form a snap-fit ​​engagement.

3. The quick-change automatic connection mechanism for hydrogen exchange pipelines according to claim 2, characterized in that: The connector (11) includes a first sleeve (12) and a second sleeve (13). The first sleeve (12) is fixed on the guide sleeve (10). The two ends of the first sleeve (12) are respectively fixed to the guide sleeve (10) and the second sleeve (13). The second sleeve (13) forms a snap-fit ​​with the locking mechanism (5), and the side wall of the second sleeve (13) is set with an arc-shaped slope.

4. The quick-change automatic connection mechanism for hydrogen exchange pipelines according to claim 3, characterized in that: The locking mechanism (5) includes a mounting hole (14), a locking claw (15), an elastic element (16), and a slot (17). The mounting hole (14) is opened on the outer shell body (3). The locking claw (15) is hinged to the mounting hole (14). The two ends of the elastic element (16) are fixed to the outer shell body (3) and the locking claw (15) respectively. The slot (17) is opened on the side of the locking claw (15) facing the one-way valve (7), and the slot (17) forms a snap-fit ​​with the second sleeve (13). A stop block (18) is fixed on the locking claw (15).

5. The quick-change automatic connection mechanism for hydrogen exchange pipelines according to claim 4, characterized in that: The locking claw (15) is inclined on the side that abuts against the connector (11).

6. The quick-change automatic connection mechanism for hydrogen exchange pipelines according to claim 4, characterized in that: The unlocking mechanism (6) includes a drive component (19) and a movable housing (20). The drive component (19) is fixed on the base (2), and the output end of the drive component (19) is fixed to the movable housing (20). A protrusion (21) is fixed on the inner wall of the movable housing (20). When the drive component (19) moves the movable housing (20), the protrusion (21) abuts against the stop block (18), causing the locking claw (15) to rotate outward to unlock the second sleeve (13).

7. The quick-change automatic connection mechanism for hydrogen exchange pipelines according to claim 6, characterized in that: The drive component (19) is a multi-position cylinder, and the piston rod of the multi-position cylinder is fixed on the movable housing (20).

8. The quick-change automatic connection mechanism for hydrogen exchange pipelines according to claim 1, characterized in that: The control component (9) is a three-way solenoid valve. The first port of the three-way solenoid valve is connected to the connecting pipe (8), the second port of the three-way solenoid valve is connected to the vehicle hydrogen refueling pipe (22), and the third port of the three-way solenoid valve is connected to the exhaust pipe (23). By controlling the three-way solenoid valve, the operation of hydrogen refueling and hydrogen-oxygen mixture discharge in the pipeline can be realized.

9. The quick-change automatic connection mechanism for hydrogen exchange pipelines according to claim 6, characterized in that: The movable outer shell (20) has a through hole (24) which corresponds to the position of the locking claw (15). The locking or unlocking status of the locking claw (15) can be easily observed through the through hole (24).

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