A sealed quick connect device

Abstract

This utility model discloses a sealing quick-connect device, including a male plug and a female plug. The male plug includes a housing A, a fixed base A, and a movable sleeve A. The housing A has an inlet end and a plug-in end A. The fixed base A and the movable sleeve A cooperate to form a first flow channel communicating with the inlet end. The plug-in end A has a valve port A and a sealing structure A. The housing A has a first sealing cavity, and the first sealing cavity has an elastic element A. The female plug includes a housing B, a push rod, a movable sleeve B, and a movable sleeve C. The housing B has a plug-in end B and an outlet end. The housing B, the movable sleeve B, and the push rod form a second flow channel communicating with the outlet end. The movable sleeve B has a valve port B communicating with the second flow channel. The push rod has a limiting part and a sealing structure B for sealing the valve port B. The plug-in end B has a limiting ring. The housing B has a second sealing cavity, and the second sealing cavity has an elastic element B and an elastic element C. This device can not only achieve self-sealing after docking and separation, but also effectively prevent the metal dust of the elastic element from contaminating the medium.

Description

Technical Field

[0001] This utility model relates to the technical field of quick-connect devices, and in particular to a sealed quick-connect device. Background Technology

[0002] A quick-connect fitting is a type of connector that allows for the connection or disconnection of pipelines without the need for tools. Quick-connect fittings include air quick-connect fittings, liquid quick-connect fittings, and gas-liquid combined quick-connect fittings, and therefore have a wide range of applications.

[0003] However, the existing sealing quick-connect device still has the following technical problems: 1. The flow channel opens after docking, and it cannot automatically seal and detach after docking separation; 2. Since the spring is set in the flow channel, the metal dust generated during the use of the spring will contaminate the medium in the flow channel. Therefore, the existing sealing quick-connect device needs to be improved. Summary of the Invention

[0004] The purpose of this invention is to provide a sealing quick-connect device that can automatically seal after docking and separation, and isolate elastic elements A, B and C from the first and second flow channels, effectively preventing metal dust generated during the use of the elastic elements from contaminating the medium in the flow channels.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a sealing quick-connect device, comprising a male plug and a female plug; The male connector includes a housing A, a fixed base A fixedly installed within the housing A, and a movable sleeve A slidably disposed within the housing A. The housing A has an inlet end and a plug-in end A. The fixed base A and the movable sleeve A cooperate to form a first flow channel communicating with the inlet end. The plug-in end A has a valve port A and a sealing structure A for sealing the valve port A. The movable sleeve A can move between a blocking position extending into the valve port A and an open position exiting the valve port A. The housing A, the fixed base A, and the movable sleeve A enclose and form a first sealing cavity. An elastic element A is provided within the first sealing cavity to hold the movable sleeve A in the blocking position. The female connector includes a housing B, a push rod fixedly installed inside the housing B, a movable sleeve B sleeved around the outer periphery of the push rod, and a movable sleeve C sleeved around the outer periphery of the movable sleeve B. The housing B has a plug-in end B and an outlet end. The housing B, the movable sleeve B, and the push rod form a second flow channel communicating with the outlet end. The movable sleeve B has a valve port B communicating with the second flow channel. The push rod has a limiting part and a sealing structure B for sealing the valve port B. The plug-in end B has a limiting ring. The housing B, the movable sleeve B, and the movable sleeve C form a second sealing cavity. The second sealing cavity has an elastic element B for abutting the movable sleeve C against the limiting ring and an elastic element C for abutting the movable sleeve B against the limiting part. When the male and female plugs are connected, plug end A is inserted into plug end B and the movable sleeve C is pushed a certain distance so that the movable sleeve B first extends into the valve port A and seals with the sealing structure A. Then, plug end A pushes the movable sleeve B and the movable sleeve C at the same time to open the valve port B while the movable sleeve B remains sealed with the sealing structure A. At the same time, the push rod pushes the movable sleeve A to release the seal between the movable sleeve A and the sealing structure A and open the valve port A. At this time, the inlet end is connected to the outlet end through the first flow channel, valve port A, the second flow channel, and valve port B.

[0006] Furthermore, one end of the movable sleeve A is a plug end and the other end is a plug end. A sealing flange is provided between the plug end and the plug end. The plug end is slidably inserted into the fixed seat A and sealed with the sliding wall of the fixed seat A. The sealing flange is slidably disposed in the housing A and sealed with the interior of the housing A. The plug end is used to cooperate with the sealing structure A to seal the valve port A.

[0007] Furthermore, a connecting hole A is provided between the sealing flange and the plug end. When the movable sleeve A moves to the open position, the housing A forms a flow cavity between the sealing flange and the valve port A. The connecting hole A is connected to the connecting cavity so that the first flow channel is connected to the valve port A.

[0008] Furthermore, a convex ring is provided inside the housing B, and the movable sleeve B is slidably inserted into the convex ring, with the movable sleeve B and the sliding wall of the convex ring providing a sealing fit.

[0009] Furthermore, the outer periphery of the movable sleeve B is provided with an abutment ring, one end of which is used to abut against the elastic member C, and the other end of which is used to abut against the movable sleeve C so that the insertion end A can simultaneously push the movable sleeve B and the movable sleeve C.

[0010] Furthermore, the movable sleeve B can move between the sealing position abutting the limiting part and the conducting position away from the limiting part. When the male and female plugs are not mated, the movable sleeve B maintains the sealing position under the action of the elastic element C.

[0011] Furthermore, a fixing seat B is provided on one side of the push rod at the outlet end, and the push rod is fixedly connected to the housing B through the fixing seat B. The fixing seat B is provided with a connecting hole B that connects the outlet end and the second flow channel.

[0012] Furthermore, when the movable sleeve A is in the sealing position, the end face of the movable sleeve A is flush with the end face of the insertion end A, and when the movable sleeve B is in the sealing position, the end face of the movable sleeve C is flush with the end face of the limiting part.

[0013] Furthermore, the male insert has a first vent hole communicating with the first sealing cavity, and the female insert has a second vent hole communicating with the second sealing cavity.

[0014] Furthermore, the sealing structure A includes multiple spaced first sealing rings disposed within the insertion end A. When the movable sleeve A is in the blocking position, the movable sleeve A and the multiple first sealing rings are in a sealing fit. When the movable sleeve A is in the open position, the movable sleeve A exits from the valve port A and does not contact the multiple first sealing rings.

[0015] In summary, this utility model has the following beneficial effects: 1. The sealing quick-connect device of this utility model is in a self-sealing state before the male and female plugs are connected. During connection, the movable sleeve B first extends into the valve port A and seals with the sealing structure A. Then the movable sleeve A releases its seal from the sealing structure A, thereby effectively preventing internal medium leakage. After connection, the first flow channel and the second flow channel are connected, thereby making the inlet end and the outlet end connected. Automatic sealing can be achieved after connection and separation. Through this setting, medium leakage can be effectively prevented. 2. The sealing quick-insertion device of this utility model confines elastic element A within the first sealing cavity to isolate elastic element A from the first flow channel. Similarly, elastic elements B and C are confined within the second sealing cavity to isolate both elastic elements B and C from the second flow channel, thereby effectively preventing metal dust generated during the use of the elastic elements from contaminating the medium in the flow channel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the male connector of the present invention.

[0017] Figure 2 This is a schematic diagram of the female connector of the present invention.

[0018] Figure 3 This is a schematic diagram of the internal structure of the male connector of the present invention.

[0019] Figure 4 This is a schematic diagram of the internal structure of the female connector of the present invention.

[0020] Figure 5 This is a schematic diagram of the male and female connectors of the present invention being connected.

[0021] Figure 6 This is the invention Figure 5 Enlarged view of point A.

[0022] Figure 7 This is a schematic diagram of the structure when the male and female plugs of the present invention are connected.

[0023] In the diagram: 10. Male connector; 11. Housing A; 111. Inlet end; 112. Plug end A; 1121. Valve port A; 1122. Sealing structure A; 113. Flow chamber; 114. First breather hole; 12. Fixed base A; 121. First flow channel; 13. Movable sleeve A; 131. Plug end; 132. Plug end; 133. Sealing flange; 134. Connecting hole A; 14. First sealing chamber; 15. Elastic element A; 16. First sealing element; 20. Female connector; 21. 211. Housing B; 2111. Insertion end B; 2111. Limiting ring; 212. Outlet end; 213. Protruding ring; 214. Second breather hole; 22. Push rod; 221. Limiting part; 222. Sealing structure B; 223. Fixed seat B; 2231. Communicating hole B; 23. Movable sleeve B; 231. Abutment ring; 232. Valve port B; 233. Second sealing element; 24. Movable sleeve C; 25. Second flow channel; 26. Second sealing cavity; 27. Elastic element B; 28. Elastic element C. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] like Figures 1-7 As shown, a sealing quick-connect device includes a male plug 10 and a female plug 20, which constitute the basic structure of this utility model.

[0028] The male connector 10 includes a housing A11, a fixed seat A12 fixedly installed in the housing A11, and a movable sleeve A13 slidably disposed in the housing A11. The housing A11 has an inlet end 111 and a plug-in end A112. The fixed seat A12 includes a seat body and a plug-in part formed in the seat body. The seat body is threadedly connected to the housing A11. The fixed seat A12 has a central channel A. The movable sleeve A13 is slidably inserted into the plug-in part. The movable sleeve A13 has a slot for the plug-in part to be inserted. The fixed seat A12 and the movable sleeve A13 cooperate to form a first flow channel 121 communicating with the inlet end 111. Specifically, the first flow channel 121 includes a central channel A and a slot. The plug-in part and the inner wall of the slot of the movable sleeve A13 are sealed together by a first sealing member 16.

[0029] The plug-in end A112 is provided with a valve port A1121 and a sealing structure A1122 for sealing the valve port A1121. The movable sleeve A13 can move between the plugged position extending into the valve port A1121 and the open position exiting the valve port A1121. When the movable sleeve A13 is in the plugged position, the movable sleeve A13 and the sealing structure A1122 are sealed together to block the valve port A1121. When the movable sleeve A13 is in the open position, the movable sleeve A13 exits the valve port A1121 and releases the sealing cooperation with the sealing structure A1122 to open the valve port A1121.

[0030] The housing A11 is provided with a limiting end face at the position corresponding to the valve port A1121. The limiting end face restricts the movable sleeve A13 from sliding out of the housing A11. When the movable sleeve A13 is in the blocking position, the sealing flange 133 end face of the movable sleeve A13 abuts against the limiting end face.

[0031] The housing A11, the fixed seat A12 and the movable sleeve A13 enclose and form a first sealing cavity 14. The first sealing cavity 14 is provided with an elastic element A15 for holding the movable sleeve A13 in the sealed position. That is to say, the movable sleeve A13 has a tendency to be held in the open position under the elastic force of the elastic element A15.

[0032] The female connector 20 includes a housing B21, a push rod 22 fixedly installed inside the housing B21, a movable sleeve B23 sleeved around the outer periphery of the push rod 22, and a movable sleeve C24 sleeved around the outer periphery of the movable sleeve B23. The housing B21 is provided with a plug-in end B211 and an outlet end 212. The housing B21, the movable sleeve B23, and the push rod 22 form a second flow channel 25 communicating with the outlet end 212. Further, a fixing seat B223 is provided on one side of the push rod 22 located at the outlet end 212. The push rod 22 is fixedly connected to the housing B21 through the fixing seat B223. The fixing seat B223 is provided with a communicating hole B2231 communicating with the outlet end 212 and the second flow channel 25. The fixing seat B223 can be integrally formed with the push rod 22, or it can be detachably connected to the push rod 22 as a whole.

[0033] The housing B21 is provided with a protruding ring 213. The movable sleeve B23 is slidably inserted into the protruding ring 213, and the movable sleeve B23 is sealed to the sliding wall of the protruding ring 213. Specifically, the movable sleeve B23 and the protruding ring 213 are sealed to each other by a second sealing member 233. The movable sleeve C24 is slidably disposed on the outer periphery of the movable sleeve B23.

[0034] The movable sleeve B23 is provided with a valve port B232 that communicates with the second flow channel 25. Specifically, the valve port B232 is located on one side of the movable sleeve B23 near the insertion end B211. The push rod 22 is provided with a limiting part 221 and a sealing structure B222 for sealing the valve port B232. Specifically, the limiting part 221 and the sealing structure B222 are both located at the end away from the fixed seat B223. The insertion end B211 is provided with a limiting ring 2111. The inner diameter of the limiting ring 2111 is adapted to the inner diameter of the insertion end A112. The limiting ring 2111 is used to restrict the movable sleeve C24 from sliding out of the housing B21.

[0035] The movable sleeve B23 and movable sleeve C24 form a second sealing cavity 26. Alternatively, the housing B21, movable sleeve B23, and movable sleeve C24 can form the second sealing cavity 26. The second sealing cavity 26 is provided with an elastic element B27 for abutting the movable sleeve C24 against the limiting ring 2111 and an elastic element C28 for abutting the movable sleeve B23 against the limiting part 221. The movable sleeve B23 can move between the sealed position abutting the limiting part 221 and the open position away from the limiting part 221. When the male plug 10 and the female plug 20 are not mated, the movable sleeve B23 maintains the sealed position under the action of the elastic element C28. In this position, the movable sleeve B23 is sealed with the sealing structure B222 to seal the valve port B232. When the movable sleeve B23 is in the open position away from the limiting part 221, the movable sleeve B23 releases the sealing cooperation with the sealing structure B222 to open the valve port B232.

[0036] When the male connector 10 mates with the female connector 20, the connector end A112 inserts into the connector end B211 and pushes the movable sleeve C24 a certain distance, so that the movable sleeve B23 first extends into the valve port A1121 and seals with the sealing structure A1122. Then, the connector end A112 simultaneously pushes the movable sleeve B23 and the movable sleeve C24 to open the valve port B232 while the movable sleeve B23 remains in a sealing fit with the sealing structure A1122. At the same time, the push rod 22 pushes the movable sleeve A13 to release the valve. The moving sleeve A13 seals with the sealing structure A1122 and opens the valve port A1121. At this time, the inlet end 111 is connected to the outlet end 212 through the first flow channel 121, the valve port A1121, the second flow channel 25, and the valve port B232. That is to say, during the process of the male plug 10 being inserted into the female plug 20, the insertion end A112 does not directly push the moving sleeve B23 towards the compression elastic element C28. Instead, the insertion end A112 first pushes the moving sleeve C24 to move a certain distance. During the process, the movable sleeve B23 remains stationary, while the insertion end A112 moves towards the movable sleeve B23, causing the movable sleeve B23 to be inserted into the valve port A1121 and sealed with the sealing structure A1122. During this process, the push rod 22 also gradually pushes the movable sleeve A13. However, during this process, the piston sleeve A does not disengage from the sealing structure A1122. As the male insert 10 continues to be inserted, the piston sleeve A exits from the valve port A1121 and disengages from the sealing structure A1122. That is, during the docking of the male insert 10 and the female insert 20, the movable sleeve B23 first seals with the sealing structure A1122, and then the piston sleeve A disengages from the sealing structure A1122. At the same time, the insertion end A112 simultaneously pushes the movable sleeve B23 and the movable sleeve C24 towards compression. During this stage, since the insertion end A112 moves synchronously with the movable sleeve B23 and the movable sleeve C24, the movable sleeve B23 maintains its sealed engagement with the sealing structure A1122.

[0037] In some embodiments, one end of the movable sleeve A13 is a plug end 131, and the other end is a plug end 132. A sealing flange 133 is provided between the plug end 131 and the plug end. The plug end 131 is slidably inserted into the fixed seat A12 and is sealed to the sliding wall of the fixed seat A12. The sealing flange 133 is slidably disposed in the housing A11 and is sealed to the inside of the housing A11. The plug end 132 is used to cooperate with the sealing structure A1122 to block the valve port A1121. Specifically, the slot only connects to the plug end 131 and does not penetrate the plug end 132. The sealing flange 133 and the movable sleeve A13 are sealed to each other by a third sealing element.

[0038] In some embodiments, the fixing base A12 is provided with a plurality of insertion holes around the central channel A, which facilitates the fixing base A12 to be fixedly connected to the housing A11 by means of a tool.

[0039] In some embodiments, a connecting hole A134 is provided between the sealing flange 133 and the plug end 132. When the movable sleeve A13 moves to the open position, the housing A11 forms a flow cavity 113 between the sealing flange 133 and the valve port A1121. The connecting hole A134 is connected to the flow cavity 113 so that the first flow channel 121 is connected to the valve port A1121. Multiple connecting holes A134 are provided and are evenly distributed circumferentially on the outer periphery of the movable sleeve A13.

[0040] In some embodiments, an abutment ring 231 is provided on the outer periphery of the movable sleeve B23. One end of the abutment ring 231 is used to abut against the elastic member C28, and the other end of the abutment ring 231 is used to abut against the movable sleeve C24 so that the insertion end A112 can simultaneously push the movable sleeve B23 and the movable sleeve C24. A gap is left between the abutment ring 231 and the inner wall of the housing B21, which allows the elastic member B27 to pass through.

[0041] In some embodiments, when the movable sleeve A13 is in the sealing position, the end face of the movable sleeve A13 is flush with the end face of the insertion end A112. When the movable sleeve B23 is in the sealing position, the end face of the movable sleeve C24 is flush with the end face of the limiting part 221. This arrangement ensures that when the male plug 10 and the female plug 20 are mated, and the end face of the push rod 22 contacts the end face of the plug end 132, the end face of the insertion end A112 abuts against the end face of the movable sleeve C24.

[0042] In some embodiments, the male plug 10 is provided with a first vent 114 communicating with the first sealing cavity 14. When the movable sleeve A13 moves toward the compression elastic member A15, the air in the first sealing cavity 14 can be discharged to the outside through the first vent 114. That is, by providing the first vent 114, the movable sleeve A13 can slide smoothly in the housing A11. Similarly, the female plug 20 is provided with a second vent 214 communicating with the second sealing cavity 26. When the movable sleeve B23 or / and the movable sleeve C24 moves toward the outlet end 212 (moves toward the compression elastic member B27 and the elastic member C28), the air in the second sealing cavity 26 can be discharged to the outside through the second vent 214. That is, by providing the second vent 214, the movable sleeve B23 and the movable sleeve C24 can slide smoothly in the housing B21.

[0043] In some embodiments, the sealing structure A1122 includes multiple spaced first sealing rings disposed within the insertion end A112. When the movable sleeve A13 is in the blocking position, the movable sleeve A13 is sealed to the multiple first sealing rings. When the movable sleeve A13 is in the open position, the movable sleeve A13 exits the valve port A1121 and does not contact the multiple first sealing rings. For example, the sealing structure A1122 includes two spaced first sealing rings. When the movable sleeve A13 is in the blocking position, the plug end 132 of the movable sleeve A13 is sealed to both first sealing rings. During the docking process of the male plug 10 and the female plug 20, the movable sleeve A13 gradually moves towards the inlet end 111 and releases the sealing to the outer first sealing ring. At the same time, the movable sleeve B23 gradually moves towards the valve port A1121 and seals to the outer first sealing ring. Then, the movable sleeve A13 continues to move towards the inlet end 111 and releases the sealing to the inner first sealing ring until it moves to the open position.

[0044] In summary, this utility model has the following beneficial effects: 1. In the sealing quick-connect device of this utility model, both the male plug 10 and the female plug 20 are in a self-sealing state before docking. During docking, the movable sleeve B23 first extends into the valve port A1121 and seals with the sealing structure A1122. Then, the movable sleeve A13 releases its seal from the sealing structure A1122, thereby effectively preventing internal media leakage. After docking, the first flow channel 121 and the second flow channel 25 are connected, thereby making the inlet end 111 and the outlet end 212 connected. Automatic sealing can be achieved after docking and separation. Through this setting, media leakage can be effectively prevented. 2. The sealing quick-insertion device of this utility model confines the elastic element A15 within the first sealing cavity 14, so that the elastic element A15 is isolated from the first flow channel 121. Similarly, the elastic elements B27 and C28 are confined within the second sealing cavity 26, so that the elastic elements B27 and C28 are isolated from the second flow channel 25, thereby effectively preventing the metal dust generated during the use of the elastic elements from contaminating the medium in the flow channel.

[0045] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A sealed quick connect device, characterized by: include The male connector (10) includes a housing A (11), a fixed seat A (12) fixedly installed inside the housing A (11), and a movable sleeve A (13) slidably disposed inside the housing A (11). The housing A (11) is provided with an inlet end (111) and a plug-in end A (112). The fixed seat A (12) and the movable sleeve A (13) cooperate to form a first flow channel (121) communicating with the inlet end (111). The plug-in end A (112) is provided with a valve port A (11). 21) and a sealing structure A (1122) for sealing the valve port A (1121), the movable sleeve A (13) is movable between the blocking position extending into the valve port A (1121) and the opening position exiting the valve port A (1121), the housing A (11), the fixed seat A (12) and the movable sleeve A (13) enclose to form a first sealing cavity (14), and the first sealing cavity (14) is provided with an elastic element A (15) for holding the movable sleeve A (13) in the blocking position; The female connector (20) includes a housing B (21), a push rod (22) fixedly installed inside the housing B (21), a movable sleeve B (23) sleeved on the outer periphery of the push rod (22), and a movable sleeve C (24) sleeved on the outer periphery of the movable sleeve B (23). The housing B (21) is provided with a plug-in end B (211) and an outlet end (212). The movable sleeve B (23) and the push rod (22) form a second flow channel (25) communicating with the outlet end (212). The movable sleeve B (23) is provided with a valve port B (24) communicating with the second flow channel (25). 32), the top rod (22) is provided with a limiting part (221) and a sealing structure B (222) for sealing the valve port B (232), the plug end B (211) is provided with a limiting ring (2111), the housing B (21), the movable sleeve B (23) and the movable sleeve C (24) form a second sealing cavity (26), the second sealing cavity (26) is provided with an elastic element B (27) for abutting the movable sleeve C (24) against the limiting ring (2111) and an elastic element C (28) for abutting the movable sleeve B (23) against the limiting part (221); When the male plug (10) and the female plug (20) are connected, the plug end A (112) is inserted into the plug end B (211) and the movable sleeve C (24) is pushed a certain distance so that the movable sleeve B (23) first extends into the valve port A (1121) and seals with the sealing structure A (1122). Then the plug end A (112) pushes the movable sleeve B (23) and the movable sleeve C (24) at the same time to open the valve port B (232) and the movable sleeve B (23) remains sealed with the sealing structure A (1122). At the same time, the push rod (22) pushes the movable sleeve A (13) to release the sealing between the movable sleeve A (13) and the sealing structure A (1122) and open the valve port A (1121). At this time, the inlet end (111) is connected to the outlet end (212) through the first flow channel (121), the valve port A (1121), the second flow channel (25), the valve port B (232).

2. A sealed quick connect device according to claim 1, wherein: One end of the movable sleeve A (13) is a plug end (131), and the other end is a plug end (132). A sealing flange (133) is provided between the plug end (131) and the plug end (132). The plug end (131) is slidably inserted into the fixed seat A (12), and the plug end (131) is sealed to the sliding wall of the fixed seat A (12). The sealing flange (133) is slidably disposed in the housing A (11) and sealed to the inner wall of the housing A (11). The plug end (132) is used to cooperate with the sealing structure A (1122) to seal the valve port A (1121).

3. A sealed quick connect device according to claim 2, wherein: A connecting hole A (134) is provided between the sealing flange (133) and the plug end (132). When the movable sleeve A (13) moves to the open position, the housing A (11) forms a flow cavity (113) between the sealing flange (133) and the valve port A (1121). The connecting hole A (134) is connected to the connecting cavity (113) so that the first flow channel (121) is connected to the valve port A (1121).

4. The sealed plug-in device of claim 1, wherein: The housing B (21) is provided with a protruding ring (213), and the movable sleeve B (23) is slidably inserted into the protruding ring (213), and the sliding wall of the movable sleeve B (23) is sealed to the protruding ring (213).

5. The sealed plug-in device of claim 1, wherein: The outer periphery of the movable sleeve B (23) is provided with an abutment ring (231). One end of the abutment ring (231) is used to abut against the elastic member C (28), and the other end of the abutment ring (231) is used to abut against the movable sleeve C (24) so ​​that the insertion end A (112) can simultaneously push the movable sleeve B (23) and the movable sleeve C (24).

6. The sealed plug-in device of claim 1, wherein: The movable sleeve B (23) can move between the sealing position of the contact limit part (221) and the conducting position of the departure limit part (221). When the male plug (10) and the female plug (20) are not connected, the movable sleeve B (23) maintains the sealing position under the action of the elastic member C (28).

7. The sealed plug-in device of claim 1, wherein: The top rod (22) is provided with a fixed seat B (223) on one side of the outlet end (212). The top rod (22) is fixedly connected to the housing B (21) through the fixed seat B (223). The fixed seat B (223) is provided with a connecting hole B (2231) connecting the outlet end (212) and the second flow channel (25).

8. The sealed plug-in device of claim 1, wherein: When the movable sleeve A (13) is in the blocking position, the end face of the movable sleeve A (13) is flush with the end face of the insertion end A (112). When the movable sleeve B (23) is in the sealing position, the end face of the movable sleeve C (24) is flush with the end face of the limiting part (221).

9. The sealed plug-in device of claim 1, wherein: The male plug (10) is provided with a first vent (114) communicating with the first sealing cavity (14), and the female plug (20) is provided with a second vent (214) communicating with the second sealing cavity (26).

10. A sealed quick connect device according to any one of claims 1-9, wherein: The sealing structure A (1122) includes multiple spaced first sealing rings disposed in the plug end A (112). When the movable sleeve A (13) is in the blocking position, the movable sleeve A (13) is sealed and engaged with the multiple first sealing rings. When the movable sleeve A (13) is in the open position, the movable sleeve A (13) exits the valve port A (1121) and does not contact the multiple first sealing rings.

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