Gas circuit connecting device

Abstract

The invention relates to the technical field of gas circuit connection, and discloses a gas circuit connecting device, a plug end comprises a plug body and a spring sliding block, when the plug end and a socket end are in a separated state, a first sealing surface abuts against the plug body, and an opening in the side, in butt joint with the socket end, of the plug body is closed; the plug body is connected with an external mechanism through a first connecting mechanism, and the first connecting mechanism is provided with a first heat insulation pad. The socket end comprises a socket body and an ejector pin, the socket body is connected with an external mechanism through a second connecting mechanism, and the second connecting mechanism is provided with a second heat insulation pad. According to the invention, the spring sliding block is arranged at the plug end, and when the socket end is separated from the plug end, the restoring force of the spring enables the spring sliding block to rapidly move, thereby realizing sealing; and the first heat insulation pad and the second heat insulation pad are arranged, so that the sealing structure failure caused by environment heat conduction can be effectively prevented, and the problem that an existing gas circuit connecting device is difficult to maintain effective sealing and separate instantaneous sealing in different temperature environments is solved.

Description

Technical Field

[0001] This invention relates to the field of gas connection technology, and more specifically to gas connection devices. Background Technology

[0002] The lack of an effective automatic sealing mechanism in gas connection devices during disconnection operations leads to rapid leakage of residual gas from the pipeline the instant the plug and socket are disconnected, causing media loss and potentially posing safety hazards. Existing solutions sometimes attempt to install independent shut-off valves on external pipelines; however, this approach suffers from response delays, fails to achieve instantaneous sealing, significantly increases system complexity and space requirements, and creates a complete thermal bridge between the metal structure and the external environment. This results in drastic temperature changes directly impacting the sealing interface. Under high-temperature conditions, continuous heat conduction to the sealing area causes the sealing structure to heat up, leading to material softening, decreased elastic modulus, and accelerated permanent deformation, significantly reducing sealing contact stress and ultimately causing seal failure. In low-temperature applications, external cold conduction to the sealing area causes the sealing material to vitrify and harden, losing its elasticity and failing to maintain an effective seal under system pressure fluctuations. Therefore, a gas connection device that can rapidly respond to achieve self-sealing and maintain sealing performance under varying temperature conditions is needed. Summary of the Invention

[0003] This invention provides a gas connection device to solve the problem that existing gas connection devices are difficult to maintain an effective seal and achieve instantaneous sealing during separation under different temperature environments.

[0004] This invention provides a gas connection device, comprising:

[0005] The plug end includes a plug body and a spring slider. A spring is fixed inside the spring slider. The sliding direction of the spring slider is parallel to the compression direction of the spring. The spring slider includes a first sealing surface. When the plug end and the socket end are in a separated state, the first sealing surface abuts against the plug body, sealing the opening on the side of the plug body that connects with the socket end. The plug body is connected to an external mechanism through a first connecting mechanism. The first connecting mechanism is provided with a first heat insulation pad. The socket end includes a socket body and a pin. When the plug end is connected to the socket end, the pin abuts against the first sealing surface, compressing the spring and causing the spring slider to move away from the socket end. This creates a flow channel by spacing the first sealing surface from the plug body. The socket body is connected to an external mechanism via a second connecting mechanism, which is provided with a second heat insulation pad. The plug end includes a first interface segment, and the socket end includes a second interface segment. When the plug end and the socket end are in a connected state, the first interface segment and the second interface segment are connected and engaged, and a first sealing structure is provided between the mating surfaces of the first interface segment and the second interface segment.

[0006] Beneficial effects: By setting a spring slider at the plug end, with the sliding direction of the spring slider parallel to the compression direction of the spring fixed inside the spring slider, and setting a pin at the plug end, the spring slider is pushed by the pin during connection. The structure is simple. When the socket end is separated from the plug end, the restoring force of the spring causes the spring slider to move quickly, achieving a seal and a fast response speed. The first and second heat insulation pads are respectively set in the first and second connecting mechanisms, so that the plug body and socket body have a heat insulation structure between them and the external mechanism, which can effectively prevent the sealing structure from failing due to environmental heat conduction.

[0007] When the two pipes need to be connected, the plug end aligns with the socket end, the pin abuts against the first sealing surface, and pushes the spring slider to move away from the socket end, so that the first sealing surface and the plug body are spaced apart to form a flow channel; when the two pipes need to be disconnected, the socket end separates from the plug end, and under the action of the spring's restoring force, the spring slider slides, so that the first sealing surface abuts against the plug body, sealing the opening on the side where the plug body and the socket end align, thus completing the self-sealing.

[0008] In one optional embodiment, the plug body includes a first flange that protrudes radially from the outer side wall of the plug body. The first connecting mechanism abuts against one side of the first flange via the first heat insulation pad. When the plug end and the socket end are in a connected state, the first connecting mechanism restricts the displacement of the plug body away from the socket end. The first connecting mechanism includes a plug clamping ring. The first heat insulation pad is disposed between the first flange and the plug clamping ring, so that there is no direct contact between the first flange and the plug clamping ring.

[0009] Beneficial effects: A first flange protruding radially from the outer side wall of the plug body is provided, so that the first connecting mechanism abuts against the side of the first flange, which facilitates the connection and fixation of the first connecting mechanism and the plug body. The first heat insulation pad is placed between the first flange and the plug clamping ring, so that there is no direct contact between the first flange and the plug clamping ring, which blocks heat transfer and avoids the external temperature from affecting the sealing structure.

[0010] In one optional embodiment, the second connecting mechanism includes a socket adapter plate and a socket mounting plate. The socket adapter plate is connected to the socket body and to the socket mounting plate. The socket mounting plate is connected to an external mechanism. A second heat insulation pad is provided between the socket adapter plate and the socket mounting plate.

[0011] Beneficial effects: The second heat insulation pad is placed between the socket adapter plate and the socket mounting plate in the second connecting mechanism, blocking heat transfer between the socket adapter plate and the socket mounting plate. The socket adapter plate is connected to the socket body, and the socket mounting plate is connected to the external mechanism. Therefore, the second heat insulation pad can effectively block heat transfer between the socket body and the external mechanism, preventing the external temperature from affecting the sealing structure.

[0012] In one optional embodiment, the spring slider is slidably connected to the inner sidewall of the plug body. The spring slider includes a connecting section, the sidewall of which is spaced apart from the plug body. The connecting section is provided with a channel opening, which is connected to a first channel inside the spring slider.

[0013] Beneficial effects: The spring slider is slidably connected to the inner wall of the plug body. The movement direction of the spring slider is restricted by the inner wall of the plug body. Without adding other limiting structures, the spring slider can slide in the corresponding direction, avoiding the spring slider's movement direction deviation from achieving the seal of the air circuit connection device. The spring slider includes a connecting section spaced apart from the plug body, and a channel opening is provided in the connecting section. Fluid can pass through the channel opening and the gap between the connecting section and the plug body, so that the pipeline can be connected.

[0014] In one alternative embodiment, the spring slider includes a sealing section connected to one end of the connecting section near the first interface section, the first sealing surface is disposed on the sealing section, and the ejector pin is coaxially disposed with the sealing section.

[0015] Beneficial effects: By setting the ejector pin and the sealing section coaxially, and placing the first sealing surface on the sealing section, the force exerted by the ejector pin on the sealing section can be more balanced during the connection process between the socket end and the plug end. This prevents the spring slider from shifting during movement, colliding with the plug body, or increasing the friction between the spring slider and the plug body, which could affect the connection of the pipes on both sides.

[0016] In one optional embodiment, the first sealing surface is provided with a sealing groove, and a second sealing structure is installed in the sealing groove. When the plug end and the socket end are in a separated state, the second sealing structure is in contact with the plug body.

[0017] Beneficial effects: A sealing groove is set on the first sealing surface, and a second sealing structure is installed in the sealing groove. When the plug end and the socket end are in the connected state, the second sealing structure fits into the plug body, which can improve the sealing effect between the plug body and the first sealing surface and better prevent fluid leakage. The sealing groove can provide stable fixation for the sealing structure and prevent the sealing structure from moving or misaligning, thus affecting the sealing effect.

[0018] In one optional embodiment, the plug body includes a protruding structure disposed on the contact surface of the plug body near the first sealing surface and protruding from the contact surface. When the plug end and the socket end are separated, the protruding structure presses against the second sealing structure.

[0019] Beneficial effects: By setting a raised structure on the plug body, the second sealing structure is pressed together to achieve a seal. With the spring's restoring force remaining unchanged, the pressure is greater, which can improve the sealing effect. Furthermore, even when the flatness of the contact surface is insufficient, the pressure is greater due to the raised structure pressing against the second sealing structure, which can also provide a reliable seal.

[0020] In one alternative embodiment, the spring slider is provided with a first fixing groove, the first fixing groove being adapted to the shape of the spring, and the first end of the spring being fixed to the first fixing groove.

[0021] Beneficial effects: The spring slider is equipped with a first fixing groove that matches the shape of the spring, fixing the first end of the spring. This provides effective fixation for the spring and prevents it from tilting or moving laterally during compression or recovery, which could affect the connection or disconnection between the socket end and the plug end.

[0022] In one optional embodiment, the plug end is provided with a fixing seat located inside the plug body, the fixing seat is provided with a second fixing groove adapted to the shape of the spring, and the second end of the spring is fixed to the second fixing groove.

[0023] Beneficial effects: A fixing seat is provided at the plug end, and a second fixing groove adapted to the shape of the spring is provided in the fixing seat. The second end of the spring is fixed in the second fixing groove, which can fix the second end of the spring relative to the plug body. The spring is compressed or restored by the movement of the first end, so that the spring produces elastic deformation. This prevents the spring from tilting or moving laterally during the compression or restoration process, which would affect the connection or disconnection between the socket end and the plug end.

[0024] In one optional embodiment, the plug end includes a plug connector, which is installed on the side of the plug end that communicates with an external pipeline. The fixing seat abuts and fixes against the plug connector. The plug connector is provided with a second channel, and the fixing seat is provided with an opening, so that the second channel communicates with the first channel inside the spring slider.

[0025] Beneficial effects: By setting a plug-pipe connector, it is easy to connect the plug end to the pipeline. The fixing seat and the plug-pipe connector are abutted and fixed. The fixing seat can be fixed through the plug-pipe connector, thereby fixing the second end of the spring. No additional fixing structure is required, and the fixing is stable and reliable. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a gas connection device according to an embodiment of the present invention; Figure 2 for Figure 1 The cross-sectional view of the gas connection device shown is in the connected state when the plug end and the socket end are connected. Figure 3 for Figure 1 The diagram shows a cross-sectional view of the gas connection device with the plug and socket ends separated.

[0028] Explanation of reference numerals in the attached figures: 1. Plug end; 11. Plug body; 111. Contact surface; 1111. Protruding structure; 112. First interface section; 1121. First mating surface; 1122. First sealing structure; 113. First flange; 114. Compression nut; 115. Positioning nut; 116. Fixed end; 12. Spring slider; 121. First sealing surface; 1211. Sealing groove; 1212. Second sealing structure; 122. Connecting section; 1221. Channel opening; 123. First channel; 124. First fixing groove; 125. Sealing... 126. Sliding surface; 1261. Groove; 13. Spring; 131. First end; 132. Second end; 14. Fixing seat; 141. Second fixing groove; 15. Plug connector; 151. Second channel; 152. Plug connector port; 153. Second flange; 154. Second sealing surface; 1541. Third sealing structure; 16. Plug clamping ring; 161. Plug clamping ring fastener; 17. First heat insulation pad; 18. Plug adapter plate; 181. Plug adapter plate fastener; 19. Plug mounting plate; 2. Socket end; 21. Socket body; 211. Pin; 212. Second interface section; 2121. Second mating surface; 213. Socket body fastener; 22. Socket adapter plate; 221. Socket adapter plate fastener; 23. Socket mounting plate; 24. Second heat insulation pad; 25. Socket body tube opening. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The following is combined Figures 1 to 3 The following describes embodiments of the present invention.

[0031] like Figures 1 to 3 According to an embodiment of the present invention, a pneumatic connection device is provided, comprising: a plug end 1 and a socket end 2. The plug end 1 includes a plug body 11 and a spring slider 12. A spring 13 is fixed inside the spring slider 12. The sliding direction of the spring slider 12 is parallel to the compression direction of the spring 13. The spring slider 12 includes a first sealing surface 121. When the plug end 1 and the socket end 2 are in a separated state, the first sealing surface 121 abuts against the plug body 11, sealing the opening on the side of the plug body 11 that is connected to the socket end 2. The plug body 11 is connected to an external mechanism through a first connecting mechanism, and the first connecting mechanism is provided with a first heat insulation pad 17. The socket end 2 includes a socket body 21 and a pin 211. When the plug end 1 and the socket end 2 are connected, the pin 211 abuts against the first sealing surface 121, compressing the spring 13 and causing the spring slider 12 to move away from the socket end 2. This creates a flow channel by spacing the first sealing surface 121 from the plug body 11. The socket body 21 is connected to an external mechanism via a second connecting mechanism, which is equipped with a second heat insulation pad 24. The plug end 1 includes a first interface section 112, and the socket end 2 includes a second interface section 212. When the plug end 1 and the socket end 2 are connected, the first interface section 112 and the second interface section 212 are connected and engaged. A first sealing structure 1122 is provided between the mating surfaces of the first interface section 112 and the second interface section 212.

[0032] In this embodiment, a spring slider 12 is provided at the plug end 1, and the sliding direction of the spring slider 12 is parallel to the compression direction of the spring 13 fixed inside the spring slider 12. A pin 211 is provided at the plug end 1. During connection, the spring slider 12 is pushed by the pin 211. The structure is simple. When the socket end 2 is separated from the plug end 1, the restoring force of the spring 13 causes the spring slider 12 to move quickly, achieving a seal and a fast response speed. A first heat insulation pad 17 and a second heat insulation pad 24 are respectively provided in the first connection mechanism and the second connection mechanism, so that the plug body 11 and the socket body 21 have a heat insulation structure between them and the external mechanism, which can effectively prevent the sealing structure from failing due to the conduction of environmental heat.

[0033] When the two pipes need to be connected, the plug end 1 mates with the socket end 2, the pin 211 abuts against the first sealing surface 121, and pushes the spring slider 12 to move away from the socket end 2, so that the first sealing surface 121 and the plug body 11 are spaced apart to form a flow channel; when the two pipes need to be disconnected, the socket end 2 separates from the plug end 1, and under the restoring force of the spring 13, the spring slider 12 slides, so that the first sealing surface 121 abuts against the plug body 11, sealing the opening on the side where the plug body 11 mates with the socket end 2, thus completing the self-sealing.

[0034] Specifically, plug end 1 and socket end 2 need to be connected under external force, and the first and second connecting mechanisms are connected to the locking mechanism of the external mechanism. Plug end 1 and socket end 2 can be connected using external mechanisms such as claw type, locking ring type, or explosion bolt type, and are applied to working scenarios such as rocket stage separation.

[0035] Further, the first connecting mechanism includes: a plug clamping ring 16, a plug clamping ring fastener 161, a first heat insulation pad 17, a plug adapter plate 18, a plug adapter plate fastener 181, and a plug mounting plate 19. The plug clamping ring 16 is connected to the plug adapter plate 18 via the plug clamping ring fastener 161, the plug adapter plate 18 is connected to the plug mounting plate 19 via the plug adapter plate fastener 181, the plug mounting plate 19 is connected to an external mechanism, and the first heat insulation pad 17 is disposed between the plug clamping ring 16 and the plug body. The second connecting mechanism includes: a socket body fastener 213, a socket adapter plate 22, a socket adapter plate fastener 221, a socket mounting plate 23, and a second heat insulation pad 24. The socket adapter plate 22 is connected to the socket body 21 via the socket body fastener 213. The socket adapter plate 22 and the socket mounting plate 23 are connected via the socket adapter plate fastener 221. The second heat insulation pad 24 is disposed between the socket adapter plate 22 and the socket mounting plate 23. The socket mounting plate 23 is connected to an external mechanism.

[0036] Specifically, the first interface segment 112 includes a first mating surface 1121, the second interface segment 212 includes a second mating surface 2121, and the first sealing structure 1122 is installed on the first mating surface 1121. When the plug end 1 and the socket end 2 are in a connected state, the first mating surface 1121 and the second mating surface 2121 cooperate, and the first sealing structure 1122 and the second mating surface 2121 fit together to achieve a sealing effect.

[0037] Furthermore, the second interface segment 212 has an internal hole structure. When the plug end 1 and the socket end 2 are connected, the first interface segment 112 is inserted into the second interface segment 212. The ejector pin 211 is located at the axis of the socket body 21, and the end of the ejector pin 211 that abuts against the first sealing surface 121 protrudes from the end face of the socket end 2 connected to the plug end 1.

[0038] like Figures 2 to 3 As shown, in one embodiment, the plug body 11 includes a first flange 113 that protrudes radially from the outer side wall of the plug body 11. A first connecting mechanism abuts against one side of the first flange 113 via a first heat insulation pad 17. When the plug end 1 and the socket end 2 are in a connected state, the first connecting mechanism restricts the displacement of the plug body 11 away from the socket end 2. The first connecting mechanism includes a plug clamping ring 16. The first heat insulation pad 17 is disposed between the first flange 113 and the plug clamping ring 16, so that there is no direct contact between the first flange 113 and the plug clamping ring 16.

[0039] In this embodiment, a first flange 113 is provided on the plug body 11, protruding radially from its outer side wall, so that the first connecting mechanism abuts against the side of the first flange 113, which facilitates the connection and fixation of the first connecting mechanism and the plug body 11. The first heat insulation pad 17 is disposed between the first flange 113 and the plug clamping ring 16, so that there is no direct contact between the first flange 113 and the plug clamping ring 16, which blocks heat transfer and avoids the external temperature from affecting the sealing structure.

[0040] As an alternative implementation, the first heat insulation pad 17 may be disposed between the plug clamping ring 16 and the plug adapter plate 18, or the first heat insulation pad 17 may be disposed between the plug adapter plate 18 and the plug mounting plate 19.

[0041] like Figures 2 to 3 As shown, in one embodiment, the second connection mechanism includes a socket adapter plate 22 and a socket mounting plate 23. The socket adapter plate 22 is connected to the socket body 21 and to the socket mounting plate 23. The socket mounting plate 23 is connected to an external mechanism. A second heat insulation pad 24 is provided between the socket adapter plate 22 and the socket mounting plate 23.

[0042] In this embodiment, the second heat insulation pad 24 is disposed between the socket adapter plate 22 and the socket mounting plate 23 in the second connecting mechanism, blocking heat transfer between the socket adapter plate 22 and the socket mounting plate 23. The socket adapter plate 22 is connected to the socket body 21, and the socket mounting plate 23 is connected to the external mechanism. Therefore, the second heat insulation pad 24 can effectively block heat transfer between the socket body 21 and the external mechanism, avoiding the impact of external temperature on the sealing structure.

[0043] Alternatively, the second heat insulation pad 24 can be disposed between the socket body 21 and the socket adapter plate 22.

[0044] like Figures 2 to 3 As shown, in one embodiment, the spring slider 12 is slidably connected to the inner sidewall of the plug body 11. The spring slider 12 includes a connecting section 122. The sidewall of the connecting section 122 is spaced apart from the plug body 11. The connecting section 122 is provided with a channel opening 1221, which is connected to a first channel 123 inside the spring slider 12.

[0045] In this embodiment, the spring slider 12 is slidably connected to the inner wall of the plug body 11. The inner wall of the plug body 11 restricts the movement direction of the spring slider 12, allowing the spring slider 12 to slide in the corresponding direction without adding other limiting structures. This prevents the spring slider 12 from deviating in the movement direction, which would prevent the air passage connection device from sealing. The spring slider 12 includes a connecting section 122 spaced apart from the plug body 11, and a channel opening 1221 is provided in the connecting section 122. Fluid can pass through the channel opening 1221 and the gap between the connecting section 122 and the plug body 11, allowing the pipeline to be connected.

[0046] Specifically, the sidewall in contact with the inner wall of the plug body 11 is a sliding surface 126. The sliding surface 126 is provided with a groove 1261, which can reduce the friction between the sliding surface 126 and the inner wall of the plug body 11.

[0047] like Figures 2 to 3 As shown, in one embodiment, the spring slider 12 includes a sealing section 125, which is connected to one end of the connecting section 122 near the first interface section 112. A first sealing surface 121 is disposed on the sealing section 125, and the ejector pin 211 is coaxially disposed with the sealing section 125.

[0048] In this embodiment, the ejector pin 211 is coaxially arranged with the sealing section 125, and the first sealing surface 121 is disposed on the sealing section 125. This can make the force exerted by the ejector pin 211 on the sealing section 125 more balanced during the connection process between the socket end 2 and the plug end 1, and prevent the spring slider 12 from deviating during the movement, colliding with the plug body 11, or increasing the friction between the spring slider 12 and the plug body 11, which would affect the connection of the pipelines on both sides.

[0049] like Figures 2 to 3 As shown, in one embodiment, the first sealing surface 121 is provided with a sealing groove 1211, and a second sealing structure 1212 is installed in the sealing groove 1211. When the plug end 1 and the socket end 2 are in a separated state, the second sealing structure 1212 is in contact with the plug body 11.

[0050] In this embodiment, a sealing groove 1211 is provided on the first sealing surface 121, and a second sealing structure 1212 is installed in the sealing groove 1211. When the plug end 1 and the socket end 2 are in a connected state, the second sealing structure 1212 fits against the plug body 11, which can improve the sealing effect between the plug body 11 and the first sealing surface 121 and better prevent fluid leakage. The sealing groove 1211 can provide stable fixation for the sealing structure and prevent the sealing structure from moving or misaligning, thus affecting the sealing effect.

[0051] Specifically, the second sealing structure 1212 is an annular sealing ring.

[0052] like Figures 2 to 3 As shown, in one embodiment, the plug body 11 includes a protrusion structure 1111. The protrusion structure 1111 is disposed on the contact surface 111 of the plug body 11 near the first sealing surface 121 and protrudes from the contact surface 111. When the plug end 1 and the socket end 2 are separated, the protrusion structure 1111 presses against the second sealing structure 1212.

[0053] In this embodiment, a protruding structure 1111 is provided on the plug body 11. The second sealing structure 1212 is pressed by the protruding structure 1111 to achieve a seal. With the restoring force of the spring 13 unchanged, the pressure is greater, which can improve the sealing effect. Furthermore, when the flatness of the contact surface 111 is insufficient, the pressure is greater due to the protruding structure 1111 pressing against the second sealing structure 1212, which can also provide a reliable seal.

[0054] Specifically, the contact surface 111 is sealed by abutting against the second sealing structure 1212 through the protrusion structure 1111, and the entire contact area between the protrusion structure 1111 and the first sealing surface 121 falls on the sealing surface of the second sealing structure 1212.

[0055] like Figures 2 to 3As shown, in one embodiment, the spring slider 12 is provided with a first fixing groove 124, the first fixing groove 124 is adapted to the shape of the spring 13, and the first end 131 of the spring 13 is fixed to the first fixing groove 124.

[0056] In this embodiment, the spring slider 12 is provided with a first fixing groove 124, which is adapted to the shape of the spring 13 and fixes the first end 131 of the spring 13. This can provide effective fixation for the spring 13 and prevent the spring 13 from tilting or moving laterally during compression or recovery, which would affect the connection or disconnection between the socket end 2 and the plug end 1.

[0057] like Figures 2 to 3 As shown, in one embodiment, the plug end 1 is provided with a fixing seat 14 located inside the plug body 11. The fixing seat 14 is provided with a second fixing groove 141 that matches the shape of the spring 13. The second end 132 of the spring 13 is fixed to the second fixing groove 141.

[0058] In this embodiment, a fixing seat 14 is provided at the plug end 1, and a second fixing groove 141 adapted to the shape of the spring 13 is provided at the fixing seat 14. The second end 132 of the spring 13 is fixed in the second fixing groove 141, so that the second end 132 of the spring 13 can be fixed relative to the plug body 11. The spring 13 is compressed or restored by the movement of the first end 131, so that the spring 13 produces elastic deformation, avoiding the spring 13 from tilting or moving laterally during the compression or restoration process, which would affect the connection or disconnection between the socket end 2 and the plug end 1.

[0059] Specifically, the outer peripheral wall of the fixing seat 14 contacts and engages with the inner side wall of the plug body 11.

[0060] like Figures 2 to 3 As shown, in one embodiment, the plug end 1 includes a plug connector 15, which is installed on the side of the plug end 1 that communicates with the external pipeline. The fixing seat 14 abuts against and fixes the plug connector 15. The plug connector 15 is provided with a second channel 151, and the fixing seat 14 is provided with an opening so that the second channel 151 communicates with the first channel 123 inside the spring slider 12.

[0061] In this embodiment, by providing a plug connector 15, it is easy to connect the plug end 1 to the pipeline. The fixing seat 14 abuts against the plug connector 15 and is fixed. The fixing seat 14 can be fixed by the plug connector 15, thereby fixing the second end 132 of the spring 13. No additional fixing structure is required, and the fixing is stable and reliable.

[0062] Specifically, the plug connector 15 is fixed to the plug body 11 by a clamping nut 114 and a positioning nut 115. The plug connector 15 is provided with a second flange 153. The clamping nut 114 abuts against the side of the second flange 153 away from the fixing seat 14, and the side of the second flange 153 near the fixing seat 14 abuts against the plug body 11, thus fixing the plug connector 15 to the plug body. The clamping nut 114 and the positioning nut 115 are provided with internal threads. The plug body 11 includes a fixed end 116, and the outer side wall of the fixed end 116 is provided with external threads. The clamping nut 114 and the positioning nut 115 are tightened onto the outer side wall of the plug body 11. The plug connector 15 is provided with a second sealing surface 154, and the second sealing surface 154 is provided with a third sealing structure 1541. The third sealing structure 1541 fits against the inner side wall of the plug body 11 to achieve a sealing effect.

[0063] Specifically, the plug connector 15 includes a plug connector port 152, through which the plug end 1 is connected to an external pipeline; the socket body 21 includes a socket body port 25, through which the socket end 2 is connected to an external pipeline.

[0064] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A gas connection device, characterized in that, include: The plug end (1) includes a plug body (11) and a spring slider (12). A spring (13) is fixed inside the spring slider (12). The sliding direction of the spring slider (12) is parallel to the compression direction of the spring (13). The spring slider (12) includes a first sealing surface (121). When the plug end (1) and the socket end (2) are separated, the first sealing surface (121) abuts against the plug body (11) to close the opening on the side where the plug body (11) and the socket end (2) are connected. The plug body (11) is connected to an external mechanism through a first connecting mechanism. The first connecting mechanism is provided with a first heat insulation pad (17). The socket end (2) includes a socket body (21) and a pin (211). When the plug end (1) is connected to the socket end (2), the pin (211) abuts against the first sealing surface (121), causing the spring (13) to compress and the spring slider (12) to move away from the socket end (2), so that the first sealing surface (121) and the plug body (11) are spaced apart to form a flow channel. The socket body (21) is connected to an external mechanism through a second connecting mechanism, and the second connecting mechanism is provided with a second heat insulation pad (24). The plug end (1) includes a first interface segment (112), and the socket end (2) includes a second interface segment (212). When the plug end (1) and the socket end (2) are in a connected state, the first interface segment (112) and the second interface segment (212) are connected and cooperated. A first sealing structure (1122) is provided between the mating surfaces of the first interface segment (112) and the second interface segment (212).

2. The gas connection device according to claim 1, characterized in that, The plug body (11) includes a first flange (113) that protrudes radially from the outer side wall of the plug body (11). The first connecting mechanism abuts against one side of the first flange (113) through the first heat insulation pad (17). When the plug end (1) and the socket end (2) are in a connected state, the first connecting mechanism restricts the displacement of the plug body (11) away from the socket end (2). The first connecting mechanism includes a plug clamping ring (16). The first heat insulation pad (17) is disposed between the first flange (113) and the plug clamping ring (16) so that there is no direct contact between the first flange (113) and the plug clamping ring (16).

3. The gas connection device according to claim 1, characterized in that, The second connection mechanism includes a socket adapter plate (22) and a socket mounting plate (23). The socket adapter plate (22) is connected to the socket body (21) and to the socket mounting plate (23). The socket mounting plate (23) is connected to an external mechanism. A second heat insulation pad (24) is provided between the socket adapter plate (22) and the socket mounting plate (23).

4. The gas connection device according to claim 1, characterized in that, The spring slider (12) is slidably connected to the inner wall of the plug body (11). The spring slider (12) includes a connecting section (122). The side wall of the connecting section (122) is spaced apart from the plug body (11). The connecting section (122) is provided with a channel opening (1221). The channel opening (1221) is connected to the first channel (123) inside the spring slider (12).

5. The gas connection device according to claim 4, characterized in that, The spring slider (12) includes a sealing section (125), which is connected to the end of the connecting section (122) near the first interface section (112). The first sealing surface (121) is disposed on the sealing section (125), and the ejector pin (211) is coaxially disposed with the sealing section (125).

6. The gas connection device according to claim 1, characterized in that, The first sealing surface (121) is provided with a sealing groove (1211), and a second sealing structure (1212) is installed in the sealing groove (1211). When the plug end (1) and the socket end (2) are separated, the second sealing structure (1212) fits against the plug body (11).

7. The gas connection device according to claim 6, characterized in that, The plug body (11) includes a protruding structure (1111), which is disposed on the contact surface (111) of the plug body (11) near the first sealing surface (121) and protrudes from the contact surface (111). When the plug end (1) and the socket end (2) are separated, the protruding structure (1111) presses against the second sealing structure (1212).

8. The gas connection device according to claim 1, characterized in that, The spring slider (12) is provided with a first fixing groove (124), the first fixing groove (124) is adapted to the shape of the spring (13), and the first end (131) of the spring (13) is fixed to the first fixing groove (124).

9. The gas connection device according to claim 1, characterized in that, The plug end (1) is provided with a fixing seat (14) located inside the plug body (11). The fixing seat (14) is provided with a second fixing groove (141) that matches the shape of the spring (13). The second end (132) of the spring (13) is fixed to the second fixing groove (141).

10. The gas connection device according to claim 9, characterized in that, The plug end (1) includes a plug tube connector (15), which is installed on the side of the plug end (1) that is connected to the external pipeline. The fixing seat (14) is fixed to the plug tube connector (15). The plug tube connector (15) is provided with a second channel (151), and the fixing seat (14) is provided with an opening so that the second channel (151) is connected to the first channel (123) inside the spring slider (12).

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