A convenient plug-in fixed thoracic surgery anti-blocking drainage device

Abstract

This invention discloses a convenient plug-in fixed thoracic surgical anti-blockage drainage device, comprising a double-lumen drainage tube body. The tube body forms a main drainage lumen and an irrigation secondary lumen. A distal oblique incision is made on the common wall of the tube body to connect the two lumens. An elastic reservoir is connected to the proximal end of the irrigation secondary lumen, comprising an ellipsoidal bladder and an elastic compression ring fitted around the circumference of the ellipsoidal bladder. The elastic compression ring applies a continuous radial compression force to the ellipsoidal bladder, driving the irrigation fluid through the irrigation secondary lumen into the main drainage lumen from the distal oblique incision. The snap-fit ​​male connector has an elastic cantilever claw with a protruding hook on its outer wall, and an annular groove on the inner wall of the female connector. When the snap-fit ​​male connector is inserted into the female connector, the protruding hook engages with the annular groove to achieve axial locking. This invention solves the technical problems of retrograde infection risk and pleural air intake risk caused by the need to open the tubing during manual irrigation, achieving the technical effect that the lumen is never exposed to the external environment during irrigation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a convenient plug-in fixed thoracic surgical anti-blockage drainage device. Background Technology

[0002] Postoperative drainage tubes are required after thoracic surgery to drain pleural effusion or pneumothorax. Current drainage tubes are single-lumen structures. When fibrin or blood clots accumulate on the inner wall of the tube, the tube must be clamped and the connection disconnected. Medical staff must then manually flush the lumen with saline solution using a syringe. After flushing, the tube is reconnected to restore drainage. During this procedure, the tube opening is exposed to the external environment, posing a risk of retrograde infection and air entering the pleural cavity. Manual flushing requires a designated person and is limited in frequency, making it difficult to prevent blockage in patients with rapid deposit formation. Furthermore, the existing tubing uses a stepped cannula connection secured with medical tape. When the patient sweats or moves, the tape's adhesion decreases, causing the connections to loosen and fail, leading to drainage interruption. Summary of the Invention

[0003] This invention provides a convenient plug-in fixed thoracic surgical drainage device to prevent blockage, solving the technical problems of easy blockage of thoracic surgical drainage tubes, infection risk during flushing, and easy loosening of connections in related technologies.

[0004] This invention discloses a continuous irrigation and drainage device for thoracic surgery, comprising a dual-lumen drainage tube body, an elastic reservoir, and a snap-fit ​​quick-connector. The dual-lumen drainage tube body forms a main drainage lumen and an irrigation sub-lumen, with a distal oblique incision on the shared wall of the tube body connecting the two lumens. The elastic reservoir is connected to the proximal end of the irrigation sub-lumen and includes an ellipsoidal bladder body and an elastic compression ring fitted around the circumference of the ellipsoidal bladder body. The elastic compression ring applies a continuous radial compression force to the ellipsoidal bladder body, driving the irrigation fluid through the irrigation sub-lumen and into the main drainage lumen from the distal oblique incision. The snap-fit ​​quick-connector is connected to the proximal port of the main drainage lumen and includes a snap-fit ​​male connector and a female connector. The outer wall of the snap-fit ​​male connector has an elastic cantilever claw with an outwardly protruding hook, and the inner wall of the female connector has an annular groove. When the snap-fit ​​male connector is inserted into the female connector, the outwardly protruding hook engages with the annular groove to achieve axial locking.

[0005] Furthermore, the dual-lumen drainage tube has a common wall integral structure, and the tube body has an eccentric configuration with a large circle containing a small circle in its cross-section. The large circle cavity is the main drainage cavity, and the small circle cavity is the flushing auxiliary cavity. The flushing auxiliary cavity is eccentrically arranged on one side of the cavity wall of the main drainage cavity. The main drainage cavity and the flushing auxiliary cavity share a section of cavity wall, and the two cavities are not connected to each other for most of the length of the tube body.

[0006] Furthermore, the cutting direction of the distal oblique incision is inclined toward the outlet of the main drainage cavity, so that when the flushing fluid is injected into the main drainage cavity through the distal oblique incision, it forms a jet angle toward the proximal end, thus flushing the inner wall of the main drainage cavity.

[0007] Furthermore, the cross-section of the distal oblique incision is flat and elongated, and the flat and elongated incision expands circumferentially along the inner wall of the main drainage cavity, so that the flushing fluid injected into the main drainage cavity expands in a fan shape to flush the cavity wall.

[0008] Furthermore, one end of the ellipsoidal capsule contracts to form a capsule neck, and the capsule neck is sealed to the proximal opening of the flushing sub-cavity, and the inner cavity of the ellipsoidal capsule is directly connected to the flushing sub-cavity.

[0009] Furthermore, the elastic compression ring is an elastic rubber ring. The inner diameter of the elastic rubber ring in its free state is smaller than the maximum outer diameter of the ellipsoidal capsule. After being fitted, the elastic rubber ring is in a stretched state, applying a radial contraction force to the ellipsoidal capsule.

[0010] Furthermore, the elastic compression ring is a spring clamp, which is made of spring steel wire bent into a ring. The inner diameter of the ring is smaller than the outer diameter of the ellipsoidal capsule. The elastic deformation of the spring steel wire applies a continuous radial compression force to the ellipsoidal capsule.

[0011] Furthermore, multiple elastic compression rings are arranged at intervals along the longitudinal axis of the tube body. The multiple elastic compression rings apply radial compression force to different sections of the ellipsoidal capsule, so that each section of the ellipsoidal capsule contracts uniformly during the drainage process.

[0012] Furthermore, a one-way valve is provided at the distal oblique incision. The one-way valve is an elastic thin sheet, with one end fixed to the wall surface of the distal oblique incision near the flushing secondary chamber, and the other end being a free end. When the flushing fluid flows from the flushing secondary chamber side to the drainage main chamber side, the free end is hydraulically pushed open, causing the one-way valve to open. When the pressure on the drainage main chamber side is higher than that on the flushing secondary chamber side, the free end of the one-way valve adheres to the incision wall surface to seal the channel.

[0013] Furthermore, the annular groove entrance on the inner wall of the female connector is provided with an inlet ramp. When the spring-loaded male connector is inserted into the female connector, the elastic cantilever claw is elastically deformed and retracted inward by the radial component force of the inlet ramp. After the outward protruding hook passes the edge of the annular groove entrance, the elastic cantilever claw elastically returns, causing the outward protruding hook to embed into the annular groove. A silicone sealing ring is installed in the inner cavity of the female connector. After the spring-loaded male connector is inserted, its outer wall radially compresses and engages with the silicone sealing ring to achieve an airtight seal.

[0014] This invention applies continuous radial compression force to the ellipsoidal cyst via an elastic compression ring, driving the flushing fluid to continuously flush the inner wall of the main drainage lumen while the tubing is closed. This solves the technical problems of retrograde infection and pleural air intake risks associated with manual flushing, which requires opening the tubing. It also ensures the lumen remains completely protected from the external environment during flushing. Furthermore, this invention continuously drives the flushing flow using elastic restoring force, eliminating the need for manual operation and preventing blockages due to limited frequency. This allows for the removal of deposits from the lumen wall in their early stages. Finally, this invention utilizes a push-in locking connection achieved through a combination of elastic cantilever claws and annular grooves. This solves the problem of adhesive tape loosening and failing due to decreased adhesion, ensuring reliable connection unaffected by patient sweating or activity. Attached Figure Description

[0015] Figure 1 This is a front view of the continuous irrigation and drainage device for thoracic surgery according to the present invention; Figure 2 This is a longitudinal sectional view of the continuous irrigation and drainage device for thoracic surgery of the present invention; Figure 3 This is a cross-sectional view of the double-lumen drainage tube body of the present invention; Figure 4 This is a longitudinal sectional view of the snap-fit ​​quick-connectors of the present invention. Figure 5 This is an isometric view of the continuous irrigation and drainage device for thoracic surgery of the present invention.

[0016] In the diagram: Dual-lumen drainage tube body-1, main drainage lumen-2, secondary flushing lumen-3, distal oblique incision-4, ellipsoidal capsule-5, capsule neck-6, elastic compression ring-7, snap-lock male connector-8, elastic cantilever claw-9, protruding hook-10, female connector-11, annular groove-12, guide bevel-13, silicone sealing ring-14, one-way valve disc-15. Detailed Implementation

[0017] Postoperative drainage tubes in thoracic surgery are used to drain pleural effusion or pneumothorax. Current drainage tubes are single-lumen structures. When signs of fibrin or blood clot deposition appear on the inner wall of the tube, the tube must be clamped and the connection disconnected. Medical staff then manually flush the lumen with saline solution using a syringe. After flushing, the tube is reconnected to restore drainage. During this procedure, the tube opening is exposed to the external environment, posing a risk of retrograde infection and air entering the pleural cavity. Furthermore, manual flushing requires a designated person and is limited in frequency, making it difficult to prevent blockage in high-risk patients with rapid deposit formation. Additionally, the stepped cannula joints between the tube segments, secured with medical tape, are prone to loosening and failure due to decreased tape adhesion after sweating or activity.

[0018] Reference Figure 1-5 This embodiment provides a continuous irrigation and drainage device for thoracic surgery, comprising at least a dual-lumen drainage tube body 1, an elastic reservoir, and a snap-fit ​​connector. The dual-lumen drainage tube body 1 extends along its longitudinal axis, forming two independent channels inside: a main drainage lumen 2 and an irrigation secondary lumen 3. The elastic reservoir is connected to the proximal end of the irrigation secondary lumen 3, continuously supplying irrigation fluid to it. The snap-fit ​​connector is connected to the proximal port of the main drainage lumen 2, and engages with the female connector 11 at the inlet end of the drainage bottle for quick locking.

[0019] The dual-lumen drainage tube body 1 is a single-walled structure with an eccentric cross-section consisting of a large circle containing a smaller circle. The large circular cavity is the main drainage cavity 2, used to drain pleural effusion or pneumothorax. The small circular cavity is the secondary flushing cavity 3, eccentrically located on one side of the wall of the main drainage cavity 2, used to deliver flushing fluid. The main drainage cavity 2 and the secondary flushing cavity 3 share a common section of wall, and the two lumens are not interconnected for most of the tube's length. At the distal end of the tube, i.e., near the pleural cavity, a distal oblique incision 4 is made on the common wall between the secondary flushing cavity 3 and the main drainage cavity 2. The distal oblique incision 4 penetrates the common wall, connecting the two lumens at this point. The cutting direction of the distal oblique incision 4 is inclined towards the outlet of the main drainage cavity 2, so that when the flushing fluid enters the main drainage cavity 2 through the distal oblique incision 4, it forms a jet angle towards the proximal end, flushing the inner wall of the main drainage cavity 2.

[0020] The elastic reservoir includes an ellipsoidal body 5, a neck 6, and an elastic compression ring 7. The ellipsoidal body 5 is a hollow, thin-walled elastomer, pre-filled with sterile saline. One end of the ellipsoidal body 5 contracts to form the neck 6, which is sealed to the proximal opening of the flushing sub-cavity 3. The inner cavity of the ellipsoidal body 5 is directly connected to the flushing sub-cavity 3. The elastic compression ring 7 is fitted around the outer periphery of the ellipsoidal body 5, applying a continuous compression force to the ellipsoidal body 5 radially. The elastic restoring force of the elastic compression ring 7 acts on the wall of the ellipsoidal body 5, maintaining a constant liquid pressure inside the ellipsoidal body 5. Driven by this pressure, the flushing fluid flows through the flushing sub-cavity 3 to the distal oblique incision 4, and is injected into the main drainage cavity 2 from the distal oblique incision 4, forming a continuous directional flushing flow.

[0021] Reference Figure 4 The spring-loaded quick-connect fitting includes a spring-loaded male connector 8 and a female connector 11. Figure 4This is a schematic diagram of the abutting structure of the spring-loaded male connector 8 and the female connector 11. The spring-loaded male connector 8 is integrally formed at the proximal port of the main drainage cavity 2. The spring-loaded male connector 8 is a tubular protruding structure, and its inner cavity is connected to the main drainage cavity 2. Each side of the outer wall of the spring-loaded male connector 8 is provided with an elastic cantilever claw 9. The fixed end of the elastic cantilever claw 9 is integrally connected to the outer wall of the spring-loaded male connector 8, and the free end of the elastic cantilever claw 9 extends along the longitudinal axis of the tube, with an outwardly protruding hook 10 at the end of the free end. The female connector 11 is fixedly installed at the inlet end of the drainage bottle. The female connector 11 is a cylindrical seat, and its inner cavity is used to accommodate the insertion of the spring-loaded male connector 8. The inner wall of the female connector 11 has an annular groove 12 corresponding to the position of the elastic cantilever claw 9. The annular groove 12 is formed in the inner wall of the female connector 11, and an inlet ramp 13 is provided at the entrance of the annular groove 12. When the spring-loaded male connector 8 is inserted into the female connector 11, the elastic cantilever claw 9 is elastically deformed and retracted inward under the radial component force of the guide slope 13. After the outward protruding hook 10 passes the entrance edge of the annular groove 12, the elastic cantilever claw 9 elastically returns, causing the outward protruding hook 10 to embed into the annular groove 12, thus achieving axial locking. The inner cavity of the female connector 11 is also equipped with a silicone sealing ring 14. After the spring-loaded male connector 8 is inserted, the outer wall of the spring-loaded male connector 8 and the silicone sealing ring 14 are radially compressed and fitted, achieving an airtight seal between the spring-loaded male connector 8 and the female connector 11.

[0022] In a specific embodiment, the elastic compression ring 7 is an elastic rubber ring. The inner diameter of the elastic rubber ring in its free state is smaller than the maximum outer diameter of the ellipsoidal capsule 5. After being fitted, the elastic rubber ring is in a stretched state, applying a radial contraction force to the ellipsoidal capsule 5.

[0023] In a specific embodiment, the elastic compression ring 7 is a spring clamp, which is made of spring steel wire bent into a ring. The inner diameter of the ring is smaller than the outer diameter of the ellipsoidal capsule 5. The elastic deformation of the spring steel wire applies a continuous radial compression force to the ellipsoidal capsule 5.

[0024] Furthermore, in order to make the flushing fluid form a larger coverage flushing effect in the main drainage cavity 2, the cross-section of the distal oblique incision 4 is flat and elongated. The flat and elongated incision spreads circumferentially along the inner wall of the main drainage cavity 2, so that the flushing fluid injected into the main drainage cavity 2 spreads in a fan shape to flush the cavity wall.

[0025] Furthermore, in order to maintain the stability of the hydraulic pressure supply as the liquid in the ellipsoidal capsule 5 gradually decreases, multiple elastic compression rings 7 are arranged at intervals along the longitudinal axis of the tube. The multiple elastic compression rings 7 apply radial compression force to different sections of the ellipsoidal capsule 5, so that each section of the ellipsoidal capsule 5 contracts evenly during the liquid drainage process, avoiding local collapse that could lead to interruption of the liquid supply.

[0026] Furthermore, to prevent the liquid in the main drainage chamber 2 from flowing back into the flushing auxiliary chamber 3 through the distal oblique incision 4, a one-way valve 15 is provided at the distal oblique incision 4. The one-way valve 15 is an elastic thin sheet, with one end fixed to the wall surface of the distal oblique incision 4 near the flushing auxiliary chamber 3, and the other end being a free end. When the flushing fluid flows from the flushing auxiliary chamber 3 to the main drainage chamber 2, the free end is hydraulically pushed open, causing the one-way valve 15 to open; when the pressure on the main drainage chamber 2 is higher than that on the flushing auxiliary chamber 3, the free end of the one-way valve 15 adheres to the wall surface of the incision to seal the channel.

[0027] In this invention, the distal end of the double-lumen drainage tube 1 is inserted into the pleural cavity through a chest wall incision, with the distal oblique incision 4 located within the pleural cavity. An elastic reservoir is located on the lateral side of the body. An elastic compression ring 7 applies continuous radial compression force to the ellipsoidal sac 5. Under pressure, the flushing fluid within the ellipsoidal sac 5 enters the flushing secondary cavity 3 through the sac neck 6, flows distally along the flushing secondary cavity 3, and after reaching the distal oblique incision 4, is injected into the main drainage cavity 2 through the distal oblique incision 4. The flushing fluid washes the inner wall of the main drainage cavity 2 at an inclined angle, dislodging fibrin or blood clots adhering to the cavity wall. The dislodged deposits flow proximally through the main drainage cavity 2 with the drainage fluid. The drainage fluid carrying the dislodged deposits flows through the proximal port of the main drainage cavity 2, into the inner cavity of the snap-fit ​​male connector 8, into the female connector 11, and then into the drainage bottle for collection. The entire flushing and drainage process is carried out continuously in a closed-loop state without disconnecting any connections.

[0028] When connecting the drainage bottle, align the snap-fit ​​male connector 8 with the opening of the female connector 11 and push it in along the longitudinal axis of the tube. The elastic cantilever claws 9 on both sides of the outer wall of the snap-fit ​​male connector 8 contact the guide slope 13 on the inner wall of the female connector 11. The guide slope 13 applies a radial force to the elastic cantilever claws 9, causing them to elastically deform and retract inward. Continuing to push in, the protruding hook 10 at the end of the elastic cantilever claw 9 passes the entrance edge of the annular groove 12, and the elastic cantilever claw 9 elastically returns to its original position. The protruding hook 10 springs into the annular groove 12 and locks in place. Simultaneously, the outer wall of the snap-fit ​​male connector 8 compresses and engages with the silicone sealing ring 14 to form an airtight seal. The operator can feel the tactile feedback when the protruding hook 10 springs into the annular groove 12 to confirm proper connection.

[0029] During disassembly, the operator presses the two elastic cantilever claws 9 on both sides simultaneously, causing the elastic cantilever claws 9 to deform inward, and the outward protruding hooks 10 to disengage from the annular grooves 12. Then, the spring-loaded male connector 8 is pulled out from the female connector 11 along the longitudinal axis of the pipe body.

[0030] In a specific embodiment, when the flushing fluid in the ellipsoidal capsule 5 is exhausted and needs to be replenished, the elastic compression ring 7 is removed from the outer periphery of the ellipsoidal capsule 5, and sterile saline is re-injected into the ellipsoidal capsule 5 through the neck 6 of the capsule. After the injection is completed, the elastic compression ring 7 is re-attached to the outer periphery of the ellipsoidal capsule 5 to restore the fluid supply.

[0031] In this embodiment, the elastic compression ring 7 applies a continuous radial compression force to the ellipsoidal cyst 5, driving the flushing fluid to flow continuously through the flushing secondary cavity 3 to the distal oblique incision 4 and into the main drainage cavity 2. This achieves continuous flushing of the inner wall of the main drainage cavity 2 while the tubing remains closed. Therefore, the flushing process does not require disconnecting the tubing connection, and the cavity is never exposed to the external environment, overcoming the risks of retrograde infection and pleural air ingress caused by manually opening the tubing during flushing. Simultaneously, the flushing flow is continuously driven by the elastic restoring force of the elastic compression ring 7, without relying on manual operation, and can flush away deposits from the cavity wall in the early stages of sediment formation, overcoming the problem of limited frequency of manual flushing and inability to prevent blockage in time. The spring-loaded quick-connect fitting achieves a push-in locking connection through the elastic deformation of the elastic cantilever claw 9. The protruding hook 10 provides a definite axial locking force after embedding into the annular groove 12. The connection reliability is not affected by the patient's sweating or activity, overcoming the problem of adhesive tape wrapping and fixing loosening and failing due to decreased adhesion.

[0032] The embodiments of the present invention have been described above. However, the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make more equivalent embodiments under the guidance of the present embodiments, and all of them are within the protection scope of the present embodiments.

Claims

1. A continuous irrigation and drainage device for thoracic surgery, characterized in that, include: The tube body (1) of the double-lumen drainage tube forms a main drainage lumen (2) and a secondary flushing lumen (3) inside. A distal oblique incision (4) is made on the common wall of the tube body to connect the two lumens. An elastic reservoir is connected to the proximal end of the flushing sub-cavity (3), including an ellipsoidal bladder (5) and an elastic compression ring (7) fitted around the outer periphery of the ellipsoidal bladder (5). The elastic compression ring (7) applies a continuous radial compression force to the ellipsoidal bladder (5), driving the flushing fluid through the flushing sub-cavity (3) from the distal end obliquely towards the incision (4) into the main drainage cavity (2). The spring-loaded quick-connect connector is connected to the proximal port of the main drainage cavity (2), including a spring-loaded male connector (8) and a female connector (11). The outer wall of the spring-loaded male connector (8) is provided with an elastic cantilever claw (9) with an outward protruding hook (10), and the inner wall of the female connector (11) is provided with an annular groove (12). When the spring-loaded male connector (8) is inserted into the female connector (11), the outward protruding hook (10) is embedded in the annular groove (12) to achieve axial locking.

2. The continuous irrigation and drainage device for thoracic surgery according to claim 1, characterized in that, The dual-cavity drainage tube body (1) has a common wall integral structure. The tube body cross section has an eccentric configuration with a large circle containing a small circle. The large circle cavity is the main drainage cavity (2), and the small circle cavity is the flushing auxiliary cavity (3). The flushing auxiliary cavity (3) is eccentrically arranged on one side of the cavity wall of the main drainage cavity (2). The main drainage cavity (2) and the flushing auxiliary cavity (3) share a cavity wall. The two cavities are not connected to each other within most of the length of the tube body.

3. The continuous irrigation and drainage device for thoracic surgery according to claim 2, characterized in that, The cutting direction of the distal oblique incision (4) is inclined toward the outlet direction of the main drainage cavity (2), so that when the flushing liquid is injected into the main drainage cavity (2) through the distal oblique incision (4), it forms a jet angle toward the proximal end and flushes the inner wall of the main drainage cavity (2).

4. The continuous irrigation and drainage device for thoracic surgery according to claim 3, characterized in that, The cross-section of the distal oblique incision (4) is flat and elongated. The flat and elongated incision expands circumferentially along the inner wall of the main drainage cavity (2), so that the flushing fluid injected into the main drainage cavity (2) spreads out in a fan shape to flush the cavity wall.

5. The continuous irrigation and drainage device for thoracic surgery according to claim 1, characterized in that, One end of the ellipsoidal capsule (5) contracts to form a capsule neck (6), and the capsule neck (6) is sealed to the proximal opening of the flushing sub-cavity (3). The inner cavity of the ellipsoidal capsule (5) is directly connected to the flushing sub-cavity (3).

6. The continuous irrigation and drainage device for thoracic surgery according to claim 1, characterized in that, The elastic compression ring (7) is an elastic rubber ring. The inner diameter of the elastic rubber ring in its free state is smaller than the maximum outer diameter of the ellipsoidal capsule (5). After being fitted, the elastic rubber ring is in a stretched state and applies a radial contraction force to the ellipsoidal capsule (5).

7. The continuous irrigation and drainage device for thoracic surgery according to claim 1, characterized in that, The elastic compression ring (7) is a spring clamp, which is made of spring steel wire bent into a ring. The inner diameter of the ring is smaller than the outer diameter of the ellipsoidal capsule (5). The elastic deformation of the spring steel wire applies a continuous radial compression force to the ellipsoidal capsule (5).

8. The continuous irrigation and drainage device for thoracic surgery according to claim 1, characterized in that, Multiple elastic compression rings (7) are arranged at intervals along the longitudinal axis of the tube. The multiple elastic compression rings (7) apply radial compression force to different sections of the ellipsoidal capsule (5) so that each section of the ellipsoidal capsule (5) contracts uniformly during the drainage process.

9. The continuous irrigation and drainage device for thoracic surgery according to claim 1, characterized in that, A one-way valve (15) is provided at the distal oblique cut (4). The one-way valve (15) is an elastic thin sheet. One end of the one-way valve (15) is fixed to the wall of the distal oblique cut (4) near the flushing sub-cavity (3), and the other end is a free end. When the flushing fluid flows from the flushing sub-cavity (3) to the drainage main cavity (2), the free end is hydraulically pushed open to open the one-way valve (15). When the pressure on the drainage main cavity (2) is higher than that on the flushing sub-cavity (3), the free end of the one-way valve (15) fits against the cut wall to close the channel.

10. The continuous irrigation and drainage device for thoracic surgery according to claim 1, characterized in that, The annular groove (12) on the inner wall of the female connector (11) is provided with an inlet ramp (13). When the snap-on male connector (8) is inserted into the female connector (11), the elastic cantilever claw (9) is subjected to the radial component force of the inlet ramp (13) and elastically deforms and retracts inward. After the outward protruding hook (10) passes the edge of the entrance of the annular groove (12), the elastic cantilever claw (9) elastically recovers and the outward protruding hook (10) is embedded in the annular groove (12). The inner cavity of the female connector (11) is equipped with a silicone sealing ring (14). After the snap-on male connector (8) is inserted, its outer wall and the silicone sealing ring (14) are radially compressed and matched to achieve an airtight seal.

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