Medical pfa tubing seal connector

Abstract

The utility model discloses a kind of medical PFA tubular product sealing connectors, belong to medical PFA tubular product technical field, its technical scheme main points include two tubular product bodies, the end of two tubular product bodies close is fixedly connected with connection component, and setting has clamping assembly between two connection components, by setting connection component, both can be realized radial seal by screw connection, also can be strengthened axial seal by the close adhesion of sealing ring and clamping groove, effectively improve the anti-leakage ability of connecting part, by setting clamping assembly, with the aid of the annular groove of first fixed ring and the annular inlay block of second fixed ring can realize axial butt joint, cooperate with the circumferential limit of positioning groove and positioning block, avoid torsion misplacement in connecting process, while triangular clamping block will be clamped into the clamping groove of annular inlay block under the action of fastening spring, form mechanical locking, prevent loosening caused by long-term vibration, the stability and anti-vibration of connection caused by loosening guarantee.

Description

Technical Field

[0001] This utility model relates to the field of medical PFA tubing technology, and in particular to a sealing connector for medical PFA tubing. Background Technology

[0002] In the medical field, PFA (perfluoroalkoxyalkane) tubing is widely used in critical scenarios such as drug delivery and fluid conduction in precision instruments due to its excellent corrosion resistance, high temperature resistance, low exudation, and good biocompatibility. These applications have extremely high requirements for the sealing, reliability, and safety of tubing connections. Once leakage or loosening occurs, it may lead to drug contamination, unstable flow, or even medical accidents, directly affecting the diagnosis and treatment effect and patient safety.

[0003] Currently, medical PFA tubing is mostly connected using traditional threaded, flanged, or welded methods. While threaded connections are easy to operate, they are prone to loosening under long-term use or vibration environments, and relying solely on threaded seals is insufficient to meet the leak-free requirements of high-precision medical scenarios. Flange connections have a large structural volume, limiting installation space, and their sealing performance depends on the compression of the gasket; improper operation can easily lead to seal failure. While welding can achieve a relatively reliable seal, it requires high operational skills and is difficult to disassemble and maintain, thus hindering rapid inspection and replacement of medical equipment and components.

[0004] Therefore, a sealing connector for medical PFA tubing is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a sealing connector for medical PFA tubing, which solves the problems of existing medical PFA tubing connections that mostly use traditional threaded connections, flange connections, or welding methods. While threaded connections are simple to operate, they are prone to loosening under long-term use or vibration environments, and relying solely on threaded seals is insufficient to meet the leak-free requirements of high-precision medical scenarios. Flange connections have a large structural volume, limiting installation space, and their sealing performance depends on the compression of the gasket, which can easily lead to seal failure if not handled properly. While welding can achieve a relatively reliable seal, it requires high operational skills and is difficult to disassemble and maintain, thus hindering the rapid inspection and replacement of medical equipment and components.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a medical PFA tubing sealing connector, comprising two tubing bodies, each tubing body having a connecting component fixedly connected to one end close to the other, and a locking component provided between the two connecting components. The connecting component includes a sealing ring and a connecting tube. The sealing ring is fixedly connected to the end of the tubing body, and an externally threaded tube is fixedly connected to the outer side of the sealing ring. The inner wall of the connecting tube has an internal thread, and the connecting tube is threaded onto the surface of the externally threaded tube. A sealing groove is provided on the side of the sealing ring near the connecting tube, and a sealing ring is adhered to the side of the connecting tube near the sealing groove, and the sealing ring cooperates with the locking groove.

[0007] Preferably, the engaging assembly includes a first fixing ring and a second fixing ring, and two connecting pipes are respectively fixedly connected to the ends of the first fixing ring and the second fixing ring that are far apart.

[0008] Preferably, the first fixing ring has an annular groove on the side near the second fixing ring, the second fixing ring has an annular insert fixedly connected to the end near the first fixing ring and the annular insert cooperates with the annular groove, the inner wall of the first fixing ring has a positioning groove, and the surface of the second fixing ring has a positioning block fixedly connected and the positioning block cooperates with the positioning groove.

[0009] Preferably, the top and bottom of the inner wall of the annular groove are provided with mounting grooves, the interior of the mounting groove is provided with a triangular locking block, and the surface of the annular insert is provided with a locking groove for use with the triangular locking block.

[0010] Preferably, a connecting rod is fixedly connected to the side of the triangular block away from the slot, and the connecting rod passes through the first fixing ring. A fastening spring is sleeved on the surface of the connecting rod, and the two ends of the fastening spring are fixedly connected to the inner wall of the mounting slot and the triangular block, respectively.

[0011] Preferably, a pull ring is fixedly connected to the end of the connecting rod away from the triangular block, and hidden grooves are provided at the top and bottom of the surface of the first fixed ring, with the pull ring located inside the hidden grooves.

[0012] Preferably, a support ring is fixedly sleeved on the surface of the first fixing ring, and a reinforcing ring is slidably connected to the surface of the first fixing ring. The inner wall of the reinforcing ring is in contact with both the first fixing ring and the second fixing ring, and the inner wall of the reinforcing ring is in contact with the surface of the pull ring.

[0013] Preferably, the support ring has multiple tie rods running through its interior, with one end of each tie rod fixedly connected to a reinforcing ring and the other end fixedly connected to a connecting ring.

[0014] Preferably, a force-applying spring is sleeved on the surface of the pull rod, and the two ends of the force-applying spring are fixedly connected to the support ring and the reinforcing ring, respectively.

[0015] Preferably, a blocking ring is fixedly sleeved on the surface of the second fixing ring, and the blocking ring is used in conjunction with the reinforcing ring.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This application sets up a connecting component, which can achieve initial fixation by using the threaded connection between the sealing ring and the connecting pipe. At the same time, the sealing ring on one side of the connecting pipe will be embedded in the groove of the sealing ring to form a double sealing structure. It can achieve radial sealing through the threaded connection and strengthen axial sealing through the tight fit between the sealing ring and the groove, which effectively improves the anti-leakage capability of the connection part. Moreover, the threaded connection method facilitates the quick assembly and disassembly of the pipe body and the locking component, taking into account both sealing performance and maintenance convenience.

[0018] 2. This application sets up a locking assembly, which can achieve axial docking by means of the annular groove of the first fixing ring and the annular insert of the second fixing ring. With the circumferential limiting of the positioning groove and the positioning block, torsional misalignment is avoided during the connection process. At the same time, the triangular locking block will be locked into the locking groove of the annular insert under the action of the fastening spring, forming a mechanical lock to prevent loosening caused by long-term vibration. The loosening caused ensures the stability and vibration resistance of the connection. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the medical PFA tubing sealing connector of this utility model;

[0020] Figure 2 This is a disassembled schematic diagram of the medical PFA tubing sealing connector of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the connecting component of this utility model;

[0022] Figure 4 This is a cross-sectional view of the snap-fit ​​assembly of this utility model;

[0023] Figure 5 This utility model Figure 2 Enlarged diagram of point A in the middle.

[0024] In the diagram, 1. Pipe body; 2. Connecting assembly; 201. Sealing ring; 202. Connecting pipe; 203. Externally threaded pipe; 204. Sealing groove; 205. Sealing ring; 3. Engaging assembly; 301. First fixing ring; 302. Second fixing ring; 303. Annular groove; 304. Annular insert; 305. Triangular locking block; 306. Locking groove; 307. Connecting rod; 308. Fastening spring; 309. Pull ring; 4. Positioning groove; 5. Positioning block; 6. Hidden groove; 7. Mounting groove; 8. Support ring; 9. Reinforcing ring; 10. Pull rod; 11. Connecting ring; 12. Force-applying spring; 13. Blocking ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-5 The present invention provides the following technical solution:

[0027] A medical PFA tubing sealing connector includes two tubing bodies 1. A connecting component 2 is fixedly connected to one end of each tubing body 1 that is close to the other. A locking component 3 is provided between the two connecting components 2. The connecting component 2 includes a sealing ring 201 and a connecting tube 202. The sealing ring 201 is fixedly connected to the end of the tubing body 1. An externally threaded tube 203 is fixedly connected to the outer side of the sealing ring 201. An internal thread is provided on the inner wall of the connecting tube 202, and the connecting tube 202 is threaded onto the surface of the externally threaded tube 203. A sealing groove 204 is provided on the side of the sealing ring 201 near the connecting tube 202. A sealing ring 205 is bonded to the side of the connecting tube 202 near the sealing groove 204, and the sealing ring 205 cooperates with the locking groove 306.

[0028] In this embodiment: by setting the connecting component 2, the sealing ring 201 can be fixedly connected to the end of the pipe body 1, serving as the basic load-bearing component for the connection. At the same time, it forms a mechanical connection with the connecting pipe 202 through the external threaded pipe 203. The external threaded pipe 203 is fixedly connected to the outside of the sealing ring 201, and its surface is machined with external threads, which can cooperate with the internal threads of the connecting pipe 202 to form a threaded connection. The thread pre-tightening force achieves the initial fixation of the pipe body 1 and the connecting component 2, and the threaded surface itself can form the first radial seal. The connecting pipe 202 is threaded and sleeved on the surface of the external threaded pipe 203, which can act as a bridge connecting the pipe body 1 and the engaging component 3. The sealing groove 204 is opened on the side of the sealing ring 201 near the connecting pipe 202, which can precisely cooperate with the sealing ring 205 on the connecting pipe 202. When the connecting pipe 202 is tightened, the sealing ring 205 will be squeezed and embedded in the sealing groove 204, forming a second axial seal, compensating for the minor gaps in the threaded seal, and thus improving the overall sealing performance.

[0029] Specifically, such as Figure 4 As shown, the engaging assembly 3 includes a first fixing ring 301 and a second fixing ring 302, and two connecting pipes 202 are respectively fixedly connected to the ends of the first fixing ring 301 and the second fixing ring 302 that are far apart.

[0030] Specifically, such as Figure 4 As shown, the first fixing ring 301 has an annular groove 303 on the side near the second fixing ring 302, and an annular insert 304 is fixedly connected to the end of the second fixing ring 302 near the first fixing ring 301, and the annular insert 304 cooperates with the annular groove 303. The inner wall of the first fixing ring 301 has a positioning groove 4, and a positioning block 5 is fixedly connected to the surface of the second fixing ring 302, and the positioning block 5 cooperates with the positioning groove 4.

[0031] Specifically, such as Figure 4 As shown, the top and bottom of the inner wall of the annular groove 303 are provided with mounting grooves 7, the interior of the mounting groove 7 is provided with a triangular locking block 305, and the surface of the annular insert 304 is provided with a locking groove 306 that cooperates with the triangular locking block 305.

[0032] Specifically, such as Figure 4 As shown, a connecting rod 307 is fixedly connected to the side of the triangular block 305 away from the slot 306, and the connecting rod 307 passes through the first fixing ring 301. A fastening spring 308 is sleeved on the surface of the connecting rod 307, and the two ends of the fastening spring 308 are fixedly connected to the inner wall of the mounting slot 7 and the triangular block 305, respectively.

[0033] Specifically, such as Figure 4 As shown, a pull ring 309 is fixedly connected to the end of the connecting rod 307 away from the triangular locking block 305. Hidden grooves 6 are provided at the top and bottom of the surface of the first fixing ring 301, and the pull ring 309 is located inside the hidden groove 6.

[0034] In this embodiment: by setting the engaging assembly 3, the first fixing ring 301 and the second fixing ring 302 can respectively connect two pipe bodies 1, and by setting the annular groove 303 and the annular insert 304, the two pipe bodies 1 can achieve precise coaxial docking; the positioning groove 4 is opened in the inner wall of the first fixing ring 301, and is used to cooperate with the positioning block 5 of the second fixing ring 302 to prevent the two pipe bodies 1 from rotating relative to each other after connection; the positioning block 5 can cooperate with the positioning groove 4 of the first fixing ring 301 to achieve circumferential positioning and ensure that the sealing position does not shift; the mounting groove 7 is opened in the inner wall of the annular groove 303, and is used to install and accommodate locking components such as the triangular locking block 305 and the fastening spring 308; the triangular locking block 305 is installed in the mounting groove 7, and under the action of the fastening spring 308, its tip can be engaged in the annular groove 303. The slot 306 in the insert 304 forms the core mechanical lock to prevent axial loosening of the connection. The slot 306 is formed on the surface of the annular insert 304 to accommodate the tip of the triangular block 305, which is the mating structure for locking. One end of the connecting rod 307 is connected to the triangular block 305, and the other end passes through the first fixing ring 301 and is connected to the pull ring 309. It is used to transmit the operating force of the pull ring 309 to the triangular block 305 to unlock. The fastening spring 308 is sleeved on the surface of the connecting rod 307 to provide a continuous pushing force to the triangular block 305, keeping it in the locked position. The pull ring 309 is connected to the outer end of the connecting rod 307 and can be manually pulled by the operator. It is the force point for unlocking. The hidden groove 6 is used to store the pull ring 309 to prevent it from being accidentally hooked during equipment operation and causing accidental locking.

[0035] Specifically, such as Figure 5 As shown, a support ring 8 is fixedly sleeved on the surface of the first fixing ring 301, and a reinforcing ring 9 is slidably connected to the surface of the first fixing ring 301. The inner wall of the reinforcing ring 9 is in contact with both the first fixing ring 301 and the second fixing ring 302, and the inner wall of the reinforcing ring 9 is in contact with the surface of the pull ring 309.

[0036] Specifically, such as Figure 5 As shown, multiple tie rods 10 run through the inside of the support ring 8. One end of the tie rod 10 is fixedly connected to the reinforcing ring 9, and the other end is fixedly connected to the connecting ring 11.

[0037] Specifically, such as Figure 5 As shown, a force-applying spring 12 is sleeved on the surface of the pull rod 10, and the two ends of the force-applying spring 12 are fixedly connected to the support ring 8 and the reinforcing ring 9, respectively.

[0038] Specifically, such as Figure 5 As shown, a blocking ring 13 is fixedly sleeved on the surface of the second fixing ring 302, and the blocking ring 13 is used in conjunction with the reinforcing ring 9.

[0039] In this embodiment: Through the above configuration, the support ring 8 can provide installation and support for the pull rod 10 and the force spring 12. After the first fixing ring 301 and the second fixing ring 302 are connected, the reinforcing ring 9 will tightly wrap around the connection part of the first fixing ring 301 and the second fixing ring 302, enhancing the vibration resistance, torsion resistance and tensile resistance of the connection. At the same time, the inner wall of the reinforcing ring 9 contacts the pull ring 309, which can press the pull ring 309 into the hidden groove 6, effectively preventing the pull ring 309 from being accidentally touched or hooked, thus preventing accidental locking. The pull rod 10 can limit the sliding trajectory of the reinforcing ring 9 and the force spring. The thrust of the 12 is evenly transmitted to the reinforcing ring 9. The connecting ring 11 can connect the ends of multiple pull rods 10 together, making it convenient for the operator to pull all the pull rods 10 simultaneously, thereby easily pulling the reinforcing ring 9 out of the locked position for easy unlocking. The force spring 12 can provide continuous thrust, pressing the reinforcing ring 9 tightly against the connection part, keeping it in the reinforced position. The blocking ring 13 is used for limiting and can block the reinforcing ring 9, ensuring that the reinforcing ring 9 stays in the optimal reinforced position, thus cooperating with the reinforcing ring 9 to form a complete wrapping structure, further improving the stability of the connection.

[0040] Working principle: First, the two connecting pipes 202 are respectively fitted onto the surfaces of the two external threaded pipes 203 and tightened to ensure that the two sections of pipe body 1 to be connected are respectively assembled and tightened with their respective connecting components 2, forming two independent connecting units. Then, the connecting ring 11 on the first fixing ring 301 is pulled, and the reinforcing ring 9 is pulled towards the support ring 8 side through the pull rod 10, so that it is in the unlocked position. Then, the first fixing ring 301 and the second fixing ring 302 are aligned, so that the positioning block 5 is aligned with the positioning groove 4, and the annular insert 304 is pushed into the annular groove 303. As the annular insert 304 continues to go deeper, the annular insert 304 will squeeze the triangular locking block 305, so that the triangular locking block 305 will retract into the mounting groove 7. When the annular insert 304 moves into place, the triangular locking block 305 will automatically lock into the locking groove 306 on the surface of the annular insert 304 under the action of the fastening spring 308, so that the first fixing ring 301 and the second fixing ring 302 can be connected. 302 is quickly locked, and then the connecting ring 11 is released. The force spring 12 will push the reinforcing ring 9 along the pull rod 10 to slide towards the connection seam until it is limited by the blocking ring 13. At this time, the reinforcing ring 9 will tightly wrap around the connection part of the first fixing ring 301 and the second fixing ring 302, and press the pull ring 309 into the hidden groove 6, thus completing the physical reinforcement and preventing mis-locking. At this point, the entire connection process is complete. When it is necessary to disconnect the connection between the two pipe body 1, first pull the connecting ring 11, and pull the reinforcing ring 9 back to the side of the support ring 8 through the pull rod 10. Then, use your fingers or tools to pry it out of the hidden groove 6 and pull the pull ring 309 outward. The pull ring 309 will drive the triangular locking block 305 through the connecting rod 307 to overcome the elastic force of the fastening spring 308 and exit from the slot 306 of the annular insert 304. Then, remove the annular insert 304 from the annular groove 303 to complete the disassembly of the second fixing ring 302 and the first fixing ring 301.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A medical PFA tubing sealing connector, comprising two tubing bodies (1), characterized in that: Two pipe bodies (1) are fixedly connected to each other at their close ends by a connecting component (2), and a locking component (3) is provided between the two connecting components (2). The connecting component (2) includes a sealing ring (201) and a connecting pipe (202). The sealing ring (201) is fixedly connected to the end of the pipe body (1). An external threaded pipe (203) is fixedly connected to the outside of the sealing ring (201). An internal thread is provided on the inner wall of the connecting pipe (202), and the connecting pipe (202) is threaded onto the surface of the external threaded pipe (203). A sealing groove (204) is provided on the side of the sealing ring (201) near the connecting pipe (202). A sealing ring (205) is bonded to the side of the connecting pipe (202) near the sealing groove (204), and the sealing ring (205) is used in conjunction with the locking groove (306).

2. The medical PFA tubing sealing connector according to claim 1, characterized in that: The engaging assembly (3) includes a first fixing ring (301) and a second fixing ring (302), and two connecting pipes (202) are respectively fixedly connected to the ends of the first fixing ring (301) and the second fixing ring (302) that are far apart.

3. A medical PFA tubing sealing connector according to claim 2, characterized in that: The first fixing ring (301) has an annular groove (303) on the side near the second fixing ring (302). The second fixing ring (302) has an annular insert (304) fixedly connected to the end near the first fixing ring (301), and the annular insert (304) cooperates with the annular groove (303). The inner wall of the first fixing ring (301) has a positioning groove (4). The surface of the second fixing ring (302) has a positioning block (5) fixedly connected, and the positioning block (5) cooperates with the positioning groove (4).

4. A medical PFA tubing sealing connector according to claim 3, characterized in that: The top and bottom of the inner wall of the annular groove (303) are provided with mounting grooves (7), and a triangular locking block (305) is provided inside the mounting groove (7). The surface of the annular insert (304) is provided with a locking groove (306) that cooperates with the triangular locking block (305).

5. A medical PFA tubing sealing connector according to claim 4, characterized in that: A connecting rod (307) is fixedly connected to the side of the triangular block (305) away from the slot (306), and the connecting rod (307) passes through the first fixing ring (301). A fastening spring (308) is sleeved on the surface of the connecting rod (307), and the two ends of the fastening spring (308) are fixedly connected to the inner wall of the mounting groove (7) and the triangular block (305) respectively.

6. A medical PFA tubing sealing connector according to claim 5, characterized in that: A pull ring (309) is fixedly connected to one end of the connecting rod (307) away from the triangular block (305). A hidden groove (6) is provided on the top and bottom of the surface of the first fixing ring (301), and the pull ring (309) is located inside the hidden groove (6).

7. A medical PFA tubing sealing connector according to claim 6, characterized in that: A support ring (8) is fixedly sleeved on the surface of the first fixing ring (301), and a reinforcing ring (9) is slidably connected to the surface of the first fixing ring (301). The inner wall of the reinforcing ring (9) is in contact with both the first fixing ring (301) and the second fixing ring (302), and the inner wall of the reinforcing ring (9) is in contact with the surface of the pull ring (309).

8. A medical PFA tubing sealing connector according to claim 7, characterized in that: Multiple tie rods (10) run through the inside of the support ring (8). One end of each tie rod (10) is fixedly connected to the reinforcing ring (9), and the other end is fixedly connected to a connecting ring (11).

9. A medical PFA tubing sealing connector according to claim 8, characterized in that: A force-applying spring (12) is sleeved on the surface of the pull rod (10), and the two ends of the force-applying spring (12) are fixedly connected to the support ring (8) and the reinforcing ring (9) respectively.

10. A medical PFA tubing sealing connector according to claim 8, characterized in that: A blocking ring (13) is fixedly sleeved on the surface of the second fixing ring (302), and the blocking ring (13) is used in conjunction with the reinforcing ring (9).

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