Connecting seal assembly and drainage tube employing the same

Abstract

The application relates to a connecting sealing assembly and a drainage tube adopting the same. The connecting sealing assembly comprises a catheter connecting seat, a catheter fixing seat and at least one sealing ring. The catheter connecting seat is internally provided with a first channel. At least one sealing ring is embedded in at least one annular groove distributed in the axial direction on the outer periphery of the front part of the catheter connecting seat. A wire groove is formed on the outer periphery of the catheter connecting seat corresponding to the wire hole on the sealing ring. The catheter fixing seat is internally provided with a second channel. The second mounting hole at the rear part of the second channel has an inner periphery in interference fit with the outer periphery of the sealing ring. When the front part of the catheter connecting seat is inserted into the second mounting hole of the catheter fixing seat and is connected and fixed through the matched elastic hook structure, the at least one sealing ring forms a seal between the front part of the catheter connecting seat and the second mounting hole of the catheter fixing seat to enable the first channel to be in sealed communication with the second channel. The drainage tube adopting the connecting sealing assembly can effectively prevent liquid seepage.

Description

Technical Field

[0001] This application relates to medical devices, and more specifically, to a connection sealing assembly and a drainage tube employing the connection sealing assembly. Background Technology

[0002] Clinically, when the body is unable to drain accumulated fluid normally, such as in cases of ureteral obstruction, pneumothorax, hemothorax, pleural effusion, or bile excess, a drainage tube connected to a drainage device is often used to drain the pus, blood, and fluid accumulated between body tissues or in body cavities to the outside of the body for rapid and effective drainage treatment.

[0003] Most existing drainage tubes have a pig-tail structure, where the front end is rolled up to form a pig-tail shape. After insertion into the body, the accumulated fluid enters the drainage tube through an opening in the pig-tail and eventually drains out. However, because the drainage of accumulated fluid takes time, sometimes the drainage tube needs to remain in the patient's body for several days to several months. Over time and with the flow of fluid, if the drainage tube does not seal well, leakage may occur, allowing bacteria to enter the catheter along the locking channel and cause secondary infection to the patient.

[0004] Currently, the connection and sealing method of the common pig tail structure drainage tube connector on the market is mostly glue bonding, which is complicated and costly in terms of assembly process. Utility Model Content

[0005] The technical problem to be solved by this application is to provide a connection sealing component that can realize the connection and sealing of the drainage tube joint and a drainage tube using the connection sealing component, in view of the above-mentioned defects of the prior art.

[0006] This application, in order to solve its technical problem, proposes a connecting sealing assembly in the first aspect, including a conduit connector, a conduit fixing seat, and at least one sealing ring, wherein: the conduit connector has a first channel that extends axially from front to back; the outer periphery of the front part of the conduit connector has at least one annular groove distributed axially; the at least one sealing ring is respectively embedded in the at least one annular groove; the outer periphery of the conduit connector also has an axially through wire groove corresponding to the axially through wire hole provided on the sealing ring; the conduit fixing seat has a second channel that extends axially from front to back; the second channel has a first mounting hole formed at the front part of the conduit fixing seat and a second mounting hole formed at the rear part of the conduit fixing seat; the second mounting hole has an inner periphery that forms an interference fit with the outer periphery of the sealing ring; when the front part of the conduit connector is inserted into the second mounting hole of the conduit fixing seat and connected and fixed by an elastic hook structure that mates with the rear part of the conduit fixing seat and the conduit connector, the at least one sealing ring forms a seal between the front part of the conduit connector and the second mounting hole of the conduit fixing seat, so that the first channel is sealed and connected to the second channel.

[0007] In one embodiment of the connecting sealing assembly according to the first aspect of this application, the sealing ring has an inner circumferential surface and an outer circumferential surface, the inner circumferential surface of the sealing ring is interference-fitted with the bottom circumferential surface of the annular groove, and the outer circumferential surface of the sealing ring is interference-fitted with the wall circumferential surface of the second mounting hole.

[0008] In one embodiment of the connecting sealing assembly according to the first aspect of this application, the end faces of the sealing ring at both axial ends are interference-fitted with the groove walls on both sides of the annular groove.

[0009] According to one embodiment of the connection sealing assembly described in the first aspect of this application, the rear outer periphery of the conduit connector is provided with a flange, the flange having a front end face that abuts against the rear end face of the conduit fixing seat when the conduit connector is connected and fixed to the conduit fixing seat.

[0010] According to one embodiment of the connection sealing assembly described in the first aspect of this application, the front end of the flange is provided with forward-extending elastic hooks on both sides of the wire groove, and the rear end of the second mounting hole of the conduit fixing seat is provided with a first limiting groove corresponding to the elastic hooks and a slot extending to the outer periphery of the conduit fixing seat is formed in the first limiting groove; when the front part of the conduit connecting seat is inserted into the second mounting hole of the conduit fixing seat until the flange abuts against the rear end face of the conduit fixing seat, the elastic hooks are engaged in the slot along the first limiting groove, restricting the conduit connecting seat from moving axially backward.

[0011] According to one embodiment of the connection sealing assembly described in the first aspect of this application, a limiting block is further provided on the rear outer periphery of the conduit connector in front of the flange. The upper and lower sides of the limiting block form first limiting planes, and the left and right sides form second limiting planes. The rear end of the second mounting hole of the conduit fixing seat is provided with two upper and lower third limiting planes that cooperate with the first limiting planes and two left and right fourth limiting planes that cooperate with the second limiting planes.

[0012] To address its technical problem, this application proposes a drainage tube in a second aspect, comprising a conduit with a pigtail segment at its front end and an anti-bend sleeve at its rear end, and further comprising the aforementioned connecting sealing assembly. The anti-bend sleeve is fixedly connected to a first mounting hole in a conduit fixing seat. The lumen of the conduit is connected to a second channel of a conduit connecting seat through a first channel of the conduit fixing seat to form a drainage channel. The traction wire of the pigtail segment passes through a wire groove on the conduit connecting seat via an interference fit and exits from the rear of the conduit connecting seat through a wire hole on a sealing ring.

[0013] According to one embodiment of the drainage tube described in the second aspect of this application, the drainage tube further includes a buckle connected to the end of the traction line extending from the rear of the conduit connector, and the outer periphery of the conduit connector is further provided with a winding groove and a buckle locking position behind the flange.

[0014] According to one embodiment of the drainage tube described in the second aspect of this application, the rear end of the catheter connector is further provided with a connector for connecting to the drainage device.

[0015] In one embodiment of the drainage tube according to the second aspect of this application, the drainage tube further includes a straight guide tube sleeved outside the catheter.

[0016] The connection sealing assembly and drainage tube using the connection sealing assembly of this application have the following advantages: According to the embodiment of this application, the connection sealing assembly physically connects the catheter connector and the catheter fixing seat through an elastic hook structure, and simultaneously achieves a sealed connection of the drainage channel through the assembly of the sealing ring with the catheter connector and the catheter fixing seat. The drainage tube using this connection sealing assembly has a simple structure, simple manufacturing process, and low cost. It can achieve connection and sealing at the drainage tube joint, effectively preventing leakage. Moreover, the traction wire passes through the sealing ring via an interference fit through the wire groove on the catheter connector. In addition to being able to move friably within the sealing ring, there are free movement channels on both sides of the sealing ring, facilitating adjustment of the shape of the pigtail section at the front end of the catheter. Attached Figure Description

[0017] The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0018] Figure 1This is a schematic diagram of the overall structure of a drainage tube according to an embodiment of this application;

[0019] Figure 2 This is an exploded structural diagram of a connection sealing assembly according to an embodiment of this application;

[0020] Figure 3 yes Figure 2 A schematic diagram of the structure of the conduit connector;

[0021] Figure 4 yes Figure 2 A schematic diagram of the sealing ring structure in the middle;

[0022] Figure 5 yes Figure 2 An axial sectional view of the conduit fixation seat at one angle;

[0023] Figure 6 yes Figure 2 An axial sectional view of the conduit fixation seat from another angle;

[0024] Figure 7 yes Figure 1 An axial cross-sectional view of the drainage tube at one angle;

[0025] Figure 8 yes Figure 1 The axial cross-sectional view of the drainage tube shown from another angle.

[0026] Reference numerals: 100-Drainage tube; 1-Conduit; 11-Pigtail section; 2-Straight guide tube; 3-Anti-folding sleeve; 4-Connecting sealing assembly; 41-Conduit connector; 411-First channel; 412-Wire groove; 413-Front end; 414-Annular groove; 4141-Groove bottom circumferential surface; 4142-Groove wall; 415-Flange; 4151-Front end face; 416-Limiting block; 4161-First limiting plane; 4162-Second limiting plane; 417-Elastic hook; 4181- Wire winding groove; 4182-Snap-ring buckle position; 419-Connector; 42-Sealing ring; 421-Outer circumferential surface; 422-Inner circumferential surface; 423-End face; 424-Wire passage hole; 43-Conduit fixing seat; 431-First channel; 4311-First mounting hole; 4312-Second mounting hole; 4313-Circumferential surface of hole wall; 432-Rear end face; 433-Limiting groove; 434-Slot; 4351-Third limiting plane; 4352-Fourth limiting plane; 5-Traction wire; 6-Snap-ring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the embodiments and features described herein can be combined with each other unless otherwise specified.

[0028] This application proposes a connection sealing assembly and a drainage tube using the connection sealing assembly. Figure 1 A schematic diagram of the structure of a drainage tube 100 according to an embodiment of this application is shown. See also Figure 1 As shown, the drainage tube 100 mainly consists of a catheter 1, a straight guide tube 2, an anti-bend sleeve 3, a connecting sealing assembly 4, a traction line 5, and a retainer 6. The front end of the catheter 1 has a pig tail section 11, and the rear end of the catheter 1 has an anti-bend sleeve 3. The anti-bend sleeve 3 is connected to the front end of the connecting sealing assembly 4. The traction line 5, used to pull the pig tail section 11, passes through the lumen 12 of the catheter 1 (see...). Figure 8 (As shown) The catheter 1 extends from the rear of the connecting sealing assembly 4 and connects to the buckle 6. During the drainage procedure, the guide tube 2 is used to straighten the pigtail segment 11 at the front end of the catheter 1. Then, other puncture auxiliary instruments are used to puncture the catheter 1 into the location where fluid needs to be drained. After the puncture is in place, the traction thread 5 (e.g., nylon thread) is radially wrapped around the connecting sealing assembly 4 until the traction thread 5 curls and tightens the pigtail segment 11 at the front end of the catheter 1. Then, the buckle 6 is fastened to the connecting sealing assembly 4, and finally, the drainage device is connected through the connecting sealing assembly 4 for drainage.

[0029] See further Figure 2 As shown, the connecting sealing assembly 4 is further composed of a conduit connector 41, a sealing ring 42, and a conduit fixing seat 43. See details... Figure 4 As shown, the sealing ring 42 has an outer circumferential surface 421 and an inner circumferential surface 422, and end faces 423 at both axial ends. The sealing ring 42 also has wire-passing holes 424 that axially extend through both ends, and the wire-passing holes 424 form an interference fit with the traction wire 5. See also... Figure 3As shown, the conduit connector 41 has a first channel 411 that extends axially from front to back. Two identical annular grooves 414 are arranged axially around the front outer periphery of the conduit connector 41. Each annular groove 414 has a bottom circumferential surface 4141 and two side walls 4142. The inner circumferential surface 422 of the sealing ring 42 is press-fitted with the bottom circumferential surface 4141 of the annular groove 414, and the two end faces 423 of the sealing ring 42 are also press-fitted with the side walls 4142 of the annular groove 414, thus tightly fitting the sealing ring 42 into the annular groove 414. A wire groove 412, extending axially, is also provided on the outer periphery of the conduit connector 41 corresponding to the position of the wire hole 424 on the sealing ring 8. The traction wire 5 can pass through this wire groove 412, through the wire hole 424 on the sealing ring 42, and exit from the rear of the conduit connector 41. See further details. Figure 3 As shown, the outer rear periphery of the conduit connector 41 is provided with a flange 415, the front end of which forms a front face 4151. The front end of the flange 415 has forward-extending elastic hooks 417 on both radial sides of the wire groove 412. Furthermore, the outer rear periphery of the conduit connector 41 is also provided with a limiting block 416 in front of the flange 41. The upper and lower sides of the limiting block 416 form first limiting planes 4161, and the left and right sides form second limiting planes 4162. In addition, the outer periphery of the conduit connector 41 is provided with a winding groove 4181 and a buckle latching position 4182 behind the flange 415 to facilitate winding the traction wire 5 and fixing the buckle 6. The rear end of the conduit connector 41 is also provided with a connector 419 for connecting to a drainage device.

[0030] Correspondingly, see Figure 5 and Figure 6 As shown, the conduit fixing seat 43 has a second channel 431 that extends axially from front to back. The second channel 431 has a first mounting hole 4311 formed at the front of the conduit fixing seat 43 and a second mounting hole 4312 formed at the rear of the conduit fixing seat 43. The first mounting hole 4311 is used to fix the anti-bend sleeve 3 of the connecting conduit 1, and the second mounting hole 4312 is used to mate with the front of the conduit connecting seat 41. Furthermore, the second mounting hole 4312 has a hole wall circumferential surface 4313 that forms an interference fit with the outer circumferential surface 421 of the sealing ring 42. See also Figure 5 and Figure 6As shown, the rear end of the second mounting hole 4312 of the catheter fixing seat 43 is provided with a limiting groove 433 corresponding to the elastic hook 417 on the catheter connecting seat 41, and a slot 434 extending to the outer periphery of the catheter fixing seat 43 is formed in the limiting groove 433. The rear end of the second mounting hole 4312 of the catheter fixing seat 43 is also provided with two upper and lower third limiting planes 4351a and 4351b corresponding to the upper and lower first limiting planes 4161 of the limiting block 416, and two left and right fourth limiting planes 4352a and 4352b corresponding to the left and right second limiting planes 4162 of the limiting block 416.

[0031] When connecting the conduit connector 41 and the conduit fixing seat 43, the front part of the conduit connector 41 is inserted into the second mounting hole 4312 of the conduit fixing seat 43 until the front end face 4151 of the flange 415 abuts against the rear end face 432 of the conduit fixing seat 43. At this point, the elastic hook 417 is precisely engaged in the slot 434 along the limiting groove 433 (see [reference]). Figure 7 (As shown). At this time, the lumen 12 of the catheter 1 is sealed and connected to the second channel 411 of the catheter connector 41 through the first channel 431 of the catheter fixing seat 43 to form a drainage channel. Moreover, the front end face 4151 of the flange 415 abuts against the rear end face 432 of the catheter fixing seat 43, restricting the catheter connector 41 from moving forward along the axial direction, and the engagement of the elastic hook 417 and the slot 434 restricts the catheter connector 41 from moving backward along the axial direction. At the same time, the upper and lower first limiting planes 4161 of the limiting block 416 abut against the corresponding two third limiting planes 4351a and 4351b in the second mounting hole 4312 of the catheter fixing seat 43, further restricting the radial movement freedom of the catheter connector 41 and the catheter fixing seat 43 (see Figure 8 As shown, the two second limiting planes 4162 on the left and right sides of the limiting block 416 abut against the corresponding two fourth limiting planes 4352a and 4352b in the second mounting hole 4312 of the catheter fixing seat 43, further restricting the axial rotational freedom of the catheter connecting seat 41 and the catheter fixing seat 43. This achieves a connection and fixation between the catheter connecting seat 41 and the catheter fixing seat 43 through a matching elastic hook structure. The outer circumferential surface 421 of the sealing ring 42 embedded in the front of the catheter connecting seat 41 is press-fitted with the circumferential surface 4313 of the hole wall of the second mounting hole 4312 to form a tight seal, ensuring that the first channel 411 of the catheter connecting seat 41 is sealed and connected to the second channel 431 of the catheter fixing seat 43. If there are concerns about the sealing effect of a single sealing ring 42, another sealing ring 42 can be added in another annular groove 414 at the front of the catheter connecting seat 41 to enhance the sealing effect and achieve double sealing protection.

[0032] According to a specific embodiment of this application, the rear end of the catheter 1 and the anti-bend tube 3 can be connected by injection molding to achieve good sealing. Similarly, the anti-bend tube 3 can be injection molded to the front end of the catheter fixing seat 43 to achieve good sealing. The catheter fixing seat 43 and the catheter connecting seat 41 are physically connected and fixed by the aforementioned elastic hook structure. Simultaneously, the connection and sealing of the drainage channel are achieved through the assembly of the sealing ring 42 with the catheter connecting seat 41 and the catheter fixing seat 43. Compared to existing adhesive bonding methods, the elastic hook 417 can be released by pressing through the slot 434, eliminating the need to scrap the entire drainage tube 100 when leakage occurs due to manufacturing defects. Furthermore, see... Figure 8 As shown, the traction wire 5 enters the catheter fixing seat 43 from the lumen 12 of the catheter 1, passes through the wire groove 412 on the catheter connecting seat 41, passes through the sealing ring 42, and is led out from the rear of the catheter connecting seat 41. In addition to being able to move within the sealing ring 42 with interference fit friction, there are free movement channels on both sides of the sealing ring 42, which facilitates the adjustment of the shape of the pig tail section 11 at the front end of the catheter 1.

[0033] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A connection sealing assembly, characterized in that, Includes a catheter connector, a catheter retainer, and at least one sealing ring, wherein: The conduit connector has a first channel that runs through the front and rear of the conduit connector. The outer periphery of the front part of the conduit connector has at least one annular groove distributed along the axis. At least one sealing ring is respectively embedded in the at least one annular groove. The outer periphery of the conduit connector also has an axially through wire groove corresponding to the axially through wire hole provided on the sealing ring. The catheter fixing seat is provided with a second channel that runs through the front and rear of the axial direction. The second channel has a first mounting hole formed at the front of the catheter fixing seat and a second mounting hole formed at the rear of the catheter fixing seat. The second mounting hole has an inner circumference that forms an interference fit with the outer circumference of the sealing ring. When the front part of the catheter connector is inserted into the second mounting hole of the catheter fixing seat and connected and fixed by the elastic hook structure that mates between the rear part of the catheter fixing seat and the catheter connector, the at least one sealing ring forms a seal between the front part of the catheter connector and the second mounting hole of the catheter fixing seat so that the first channel is sealed and connected to the second channel.

2. The connection sealing assembly according to claim 1, characterized in that, The sealing ring has an inner circumferential surface and an outer circumferential surface. The inner circumferential surface of the sealing ring is interference-fitted with the bottom circumferential surface of the annular groove, and the outer circumferential surface of the sealing ring is interference-fitted with the wall circumferential surface of the second mounting hole.

3. The connection sealing assembly according to claim 2, characterized in that, The end faces at both axial ends of the sealing ring are interference-fitted with the groove walls on both sides of the annular groove.

4. The connection sealing assembly according to claim 1, characterized in that, The outer rear periphery of the catheter connector is provided with a flange, and the front end face of the flange abuts against the rear end face of the catheter fixing seat when the catheter connector is connected and fixed to the catheter fixing seat.

5. The connection sealing assembly according to claim 4, characterized in that, The front end of the flange is provided with forward-extending elastic hooks on both sides of the wire groove. The rear end of the second mounting hole of the conduit fixing seat is provided with a first limiting groove corresponding to the elastic hooks, and a slot extending to the outer periphery of the conduit fixing seat is formed in the first limiting groove. When the front part of the conduit connecting seat is inserted into the second mounting hole of the conduit fixing seat until the flange abuts against the rear end face of the conduit fixing seat, the elastic hooks are engaged in the slot along the first limiting groove, restricting the conduit connecting seat from moving backward along the axial direction.

6. The connection sealing assembly according to claim 5, characterized in that, The outer periphery of the rear part of the catheter connector is provided with a limiting block in front of the flange. The upper and lower sides of the limiting block form a first limiting plane, and the left and right sides form a second limiting plane. The rear end of the second mounting hole of the catheter fixing seat is provided with two upper and lower third limiting planes that cooperate with the first limiting plane and two left and right fourth limiting planes that cooperate with the second limiting plane.

7. A drainage tube, comprising a catheter, wherein the distal end of the catheter has a pigtail segment and the distal end of the catheter has an anti-bend sleeve, characterized in that, It also includes a connection sealing assembly as described in any one of claims 1-6, wherein the anti-bend sleeve is fixedly connected to the first mounting hole of the catheter fixing seat, the lumen of the catheter is connected to the second channel of the catheter connector through the first channel of the catheter fixing seat to form a drainage channel, and the traction wire of the pig tail segment passes through the wire groove on the catheter connector via the wire hole on the sealing ring and is led out from the rear of the catheter connector.

8. The drainage tube according to claim 7, characterized in that, The drainage tube also includes a buckle connected to the end of the traction line extending from the rear of the catheter connector. The outer periphery of the catheter connector is also provided with a winding groove and a buckle locking position behind the flange.

9. The drainage tube according to claim 8, characterized in that, The rear end of the catheter connector is also provided with a connector for connecting to a drainage device.

10. The drainage tube according to claim 7, characterized in that, The drainage tube also includes a straight guide tube sleeved outside the catheter.

Images