Middle line catheter infusion liquid external auxiliary device

Abstract

The invention belongs to the technical field of medical instruments, particularly relates to an external auxiliary device for midline catheter infusion liquid, and aims to solve the problems that a sterile blood vessel guide wire cannot be pushed in time or the pushing length is wrong due to the fact that the diameter of the sterile blood vessel guide wire is small and medical staff may slip due to faults during pushing. According to the technical scheme, the catheter comprises a catheter body. The external auxiliary device for the midline catheter infusion liquid has the effect of guaranteeing the accuracy of a P-wave high tip detection point, when a blood vessel guide wire body is pushed, the device can apply certain extrusion force to the blood vessel guide wire body so as to increase the contact friction force between the blood vessel guide wire body and a pushing mechanism, stable pushing is guaranteed, and the safety of the blood vessel guide wire body is improved. Meanwhile, it is guaranteed that the pushing distance of the blood vessel guide wire body in a blood vessel is correct, the situation that the blood vessel guide wire body is pushed excessively is avoided, the blood vessel guide wire body is assisted to reach the accurate position in a positioning mode, and therefore the P-wave height tip is accurately detected.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an external auxiliary device for midline catheter infusion. Background Technology

[0002] Medium-length venous catheters, also known as midline catheters or medium-length catheters, are vascular access routes inserted through the basilic vein, cephalic vein, or brachial vein of the upper limb, with the tip reaching the level of the axillary vein. They can be left in place for 1-4 weeks. They are mainly used for patients with an expected treatment time of 1-4 weeks, patients receiving continuous infusion of isotonic or near-isotonic drugs, patients receiving short-term intravenous injections of vancomycin, and patients requiring continuous sedation and analgesia. Therefore, they are widely used in clinical practice.

[0003] Intermediate-length peripheral venous catheters, or simply intermediate-length catheters, are a relatively new type of peripheral venous catheterization and infusion tool. They can reduce the stimulation of blood vessels by drugs, reduce the pain of repeated punctures for patients, and have high success rates due to the combination of visualization puncture technology, and are therefore widely used in clinical practice.

[0004] Existing midline catheter external insertion devices require the insertion of a sterile vascular guidewire into the catheter during operation. However, due to the small diameter of the sterile vascular guidewire, medical staff may slip due to errors during insertion, resulting in the sterile vascular guidewire not being pushed in time or the insertion length being incorrect, thus affecting the operation process or increasing safety hazards. Summary of the Invention

[0005] This invention discloses an external auxiliary device for midline catheter infusion, which aims to solve the technical problem in the background art where, due to the small diameter of the sterile vascular guidewire, medical staff may slip during the pushing process due to errors, resulting in the sterile vascular guidewire not being pushed in time or the pushing length being incorrect, thereby affecting the operation process or increasing safety hazards.

[0006] This invention proposes an external auxiliary device for midline catheter infusion, comprising:

[0007] The catheter body has a puncture needle at one end and a threaded connector at the other end.

[0008] A conduit connector is provided on a threaded joint, and a fixing bracket is provided on the conduit connector;

[0009] A rubber sleeve is installed at one end of the conduit connector.

[0010] The vascular guidewire body is located inside the catheter connector, threaded connector, catheter body and puncture needle.

[0011] A needle stabilization module is disposed on the puncture needle and is used to maintain the posture of the puncture needle to prevent it from being repeatedly or continuously bent.

[0012] The guidewire pushing unit is mounted on a fixed bracket. The guidewire pushing unit is used to stably push the guidewire, prevent accidental errors in guidewire pushing, and increase positioning accuracy and precise detection of P-wave peaks.

[0013] In a preferred embodiment, the guidewire delivery unit includes:

[0014] A fixed frame is mounted on a fixed bracket, and four tension spring rods are provided inside the fixed frame;

[0015] The mounting frame is located at one end of the four tension spring rods, and both the mounting frame and the fixed frame are equipped with two shaft members.

[0016] In a preferred embodiment, the guidewire pushing unit further includes:

[0017] Four push wheels are respectively mounted on four shaft members. The outer walls of the four push wheels are provided with anti-slip outer rings, and the outer walls of the four anti-slip outer rings are in contact with the outer wall of the vascular guidewire body.

[0018] The adjustment knob is located on one of the shaft members.

[0019] In a preferred embodiment, the guidewire pushing unit further includes:

[0020] Two gear components are respectively disposed on the outer wall of two shaft components, and the two gear components mesh with each other;

[0021] Four linkage wheels are respectively mounted on four shaft members, and the outer wall of every two linkage wheels is provided with the same linkage belt.

[0022] In a preferred embodiment, the guidewire pushing unit further includes:

[0023] The locking handwheel is mounted on the fixed frame.

[0024] A locking push rod is mounted on the locking handwheel, and one end of the locking push rod contacts the outer wall of one of the anti-slip outer rings.

[0025] In a preferred embodiment, the outer wall of the catheter connector is provided with a connecting side tube, one end of which is provided with an injection connector, and the inner wall of the injection connector is provided with a sealing ring.

[0026] In a preferred embodiment, the outer wall of the connecting side tube is provided with a single-handed liquid-stopping clamp, and the syringe body is provided inside the injection connector.

[0027] In a preferred embodiment, the needle stabilization module includes:

[0028] An adhesive tape is provided at the end of the puncture needle and is used to adhere to the patient to help fix the puncture needle.

[0029] Two elastic supports are provided, both of which are mounted on the adhesive tape.

[0030] In a preferred embodiment, the needle stabilization module further includes:

[0031] Two curing shells are respectively disposed on two elastic support plates, and the inner walls of both curing shells are in contact with the outer wall of the puncture needle.

[0032] Two opening and closing pull straps are respectively set on two curing shells, and the opening and closing pull straps are used to pull the curing shells to separate them.

[0033] In a preferred embodiment, the needle stabilization module further includes:

[0034] Two delivery pipes are respectively installed on two fixed housings. One end of each delivery pipe is provided with a curing agent chamber, and the inner wall of each curing agent chamber is provided with an isolation membrane.

[0035] An annular sleeve is provided on two cured shells and an adhesive tape, and the annular sleeve is used to prevent the puncture point from being exposed.

[0036] As can be seen from the above, the midline catheter infusion external auxiliary device provided by the present invention has the function of ensuring the accuracy of the detection point of P wave peak. When pushing the vascular guidewire body, the device can apply a certain squeezing force to it to increase the contact friction between the vascular guidewire body and the pushing mechanism, ensure the stable pushing, avoid slippage, and at the same time ensure the correct pushing distance of the vascular guidewire body in the blood vessel, avoid over-pushing, etc., so as to assist it in positioning to the accurate position, thereby accurately detecting P wave peak. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of an external auxiliary device for midline catheter infusion proposed in this invention;

[0038] Figure 2 This is a schematic diagram of the disassembled structure of the threaded connector and catheter connector of an external auxiliary device for midline catheter infusion fluid proposed in this invention;

[0039] Figure 3 This is a schematic diagram of the single-handed stop clamp and connecting side tube combination structure of an external auxiliary device for midline catheter infusion fluid proposed in this invention;

[0040] Figure 4 This is a schematic diagram of the guidewire pushing unit structure of an external auxiliary device for midline catheter infusion fluid proposed in this invention;

[0041] Figure 5 This is a cross-sectional view of the fixing frame structure of the external auxiliary device for midline catheter infusion fluid proposed in this invention;

[0042] Figure 6 This is a schematic diagram of the needle stabilization module structure of an external auxiliary device for midline catheter infusion fluid proposed in this invention;

[0043] Figure 7 This is a cross-sectional schematic diagram of the curing agent compartment of an external auxiliary device for infusion fluid in a midline catheter proposed in this invention.

[0044] In the diagram: 1. Catheter body; 2. Needle stabilizing module; 201. Curing agent chamber;

[0045] 202. Circular bag; 203. Adhesive tape; 204. Opening and closing pull strap; 205. Release film;

[0046] 206. Delivery tube; 207. Curing shell; 208. Elastic support; 3. Syringe body;

[0047] 4. Connecting side tube; 5. Single-handed stopcock; 6. Vascular guidewire body; 7. Guidewire pushing unit; 701. Fixing frame; 702. Locking handwheel; 703. Tensioning spring rod; 704. Shaft member; 705. Mounting frame; 706. Locking push rod; 707. Adjusting knob; 708. Gear member; 709. Pushing wheel; 710. Linkage wheel; 711. Linkage belt; 712. Anti-slip outer ring; 8. Catheter connector; 9. Fixing bracket; 10. Threaded connector; 11. Puncture needle; 12. Sealing ring; 13. Injection connector; 14. Rubber sleeve. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0049] The midline catheter infusion external auxiliary device disclosed in this invention is mainly used in scenarios where, due to the small diameter of the sterile vascular guidewire, medical staff may slip due to errors during pushing, resulting in the sterile vascular guidewire not being pushed in time or the pushing length being incorrect, thereby affecting the operation process or increasing safety hazards.

[0050] Reference Figures 1-7 An external auxiliary device for midline catheter infusion, comprising:

[0051] The catheter body 1 has a puncture needle 11 at one end and a threaded connector 10 at the other end.

[0052] The conduit connector 8 is mounted on the threaded connector 10 and has a fixing bracket 9.

[0053] Rubber sleeve 14 is provided at one end of the conduit connector 8;

[0054] The vascular guidewire body 6 is disposed inside the catheter connector 8, the threaded connector 10, the catheter body 1, and the puncture needle 11.

[0055] Needle stabilization module 2 is disposed on the puncture needle 11. The needle stabilization module 2 is used to maintain the posture of the puncture needle 11 and prevent it from bending repeatedly or continuously.

[0056] The guide wire pushing unit 7 is mounted on the fixed bracket 9. The guide wire pushing unit 7 is used to stably push the guide wire, prevent accidental errors in guide wire pushing, and increase positioning accuracy and precise detection of P-wave peaks.

[0057] Device: The medium-length catheter usually cannot reach the superior vena cava during use, but the guidewire body 6 can be used as an extension to reach the superior vena cava. The end of the extended guidewire is connected to the electrocardiogram, thereby recording the characteristic peaked P wave. Whether the peaked P wave is recorded can be used to determine whether the catheter course is correct.

[0058] The guidewire pushing unit 7 can also play a positioning role during use, which can make up for the defects of the pushing position deviation in existing medium and long catheter procedures, thereby avoiding operational errors that endanger the patient's life.

[0059] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 In a preferred embodiment, the guidewire pushing unit 7 includes:

[0060] A fixed frame 701 is mounted on a fixed bracket 9, and four tension spring rods 703 are provided inside the fixed frame 701.

[0061] Mounting frame 705 is located at one end of four tension spring rods 703. Both mounting frame 705 and fixed frame 701 are provided with two shaft members 704.

[0062] In this invention, the guidewire pushing unit 7 further includes:

[0063] Four push wheels 709 are respectively set on four shaft members 704. The outer wall of each of the four push wheels 709 is provided with an anti-slip outer ring 712. The outer wall of each of the four anti-slip outer rings 712 is in contact with the outer wall of the vascular guide wire body 6.

[0064] Adjustment knob 707 is located on one of the shaft members 704.

[0065] In this invention, the guidewire pushing unit 7 further includes:

[0066] Two gear components 708 are respectively disposed on the outer wall of two shaft components 704, and the two gear components 708 mesh with each other;

[0067] Four linkage wheels 710 are respectively set on four shaft members 704, and the outer wall of every two linkage wheels 710 is provided with the same linkage belt 711.

[0068] In this invention, the guidewire pushing unit 7 further includes:

[0069] Locking handwheel 702 is mounted on fixed frame 701;

[0070] Locking push rod 706 is mounted on locking handwheel 702, and one end of locking push rod 706 contacts the outer wall of one of the anti-slip outer rings 712.

[0071] Specifically, before the guidewire is pushed, the guidewire body 6 passes through the fixing frame 701. At this time, the tightening spring rod 703 pulls the mounting frame 705, causing the mounting frame 705 to move closer to the fixing frame 701 and apply a certain squeezing force to the guidewire. At the same time, the two gears 708 mesh. Then, the locking handwheel 702 is rotated, causing the locking handwheel 702 to drive the locking push rod 706 to separate from the anti-slip outer ring 712, so as to cancel the locking.

[0072] When pushing the vascular guidewire, rotating the adjustment knob 707 drives one of the shaft members 704 to rotate. At this time, the linkage belt 711 and the linkage wheel 710 enable two of the shaft members 704 to rotate synchronously. At the same time, since the two gear members 708 are meshed, all four shaft members 704 can rotate synchronously. The shaft members 704 on both sides of the vascular guidewire body 6 rotate in opposite directions, so that the shaft members 704 drive the pushing wheel 709 and the anti-slip outer ring 712 to rotate, thereby pushing the vascular guidewire body 6 until it reaches the accurate position, so as to accurately detect the peak of the P wave.

[0073] After the guidewire is pushed, the locking handwheel 702 is rotated so that the locking handwheel 702 drives the locking push rod 706 to contact the outer wall of one of the anti-slip outer rings 712 to lock it and prevent the guidewire from moving and affecting the data during observation.

[0074] In specific application scenarios, the guidewire pushing unit 7 is suitable for the vascular guidewire pushing process. That is, when the vascular guidewire body 6 is pushed, the guidewire pushing unit 7 can apply a certain squeezing force to it to increase the contact friction between the vascular guidewire body 6 and the anti-slip outer ring 712, ensuring that the pushing wheel 709 pushes the vascular guidewire body 6, avoiding slippage when medical staff push manually, thereby ensuring the operation process. At the same time, during the pushing process, the device can avoid over-pushing through stable pushing, so as to avoid serious complications caused by the vascular guidewire, thereby increasing the medical safety effect of the device. Furthermore, when the device ensures that the vascular guidewire body 6 is pushed to the correct distance in the blood vessel, it can assist in positioning it to the accurate position, thereby accurately detecting the peak of the P wave.

[0075] Device: The anti-slip outer ring 712 can be scored, and the pushing length of the vascular guidewire body 6 can be measured according to the scoring.

[0076] It should be noted that after pushing, the push wheel 709 and the anti-slip outer ring 712 can be locked by locking handwheel 702, thereby pausing the pushing of the vascular guidewire and avoiding the movement of the vascular guidewire during observation from affecting the data.

[0077] Reference Figure 1 and Figure 2 In a preferred embodiment, the outer wall of the conduit connector 8 is provided with a connecting side tube 4, one end of the connecting side tube 4 is provided with an injection connector 13, and the inner wall of the injection connector 13 is provided with a sealing ring 12.

[0078] Device: When the syringe body 3 and the injection connector 13 are connected, the sealing ring 12 can increase the sealing effect between the two, avoid inadequate sealing and contamination, and increase medical safety.

[0079] Reference Figure 1 , Figure 2 and Figure 3 In a preferred embodiment, a single-handed liquid-stopping clamp 5 is provided on the outer wall of the connecting side tube 4, and a syringe body 3 is provided inside the injection connector 13.

[0080] Device: The single-handed stop clamp 5 only requires the thumb and index finger to press and clamp the tubing, making it simple to operate. At the same time, medical staff do not need to use both hands when changing dressings, adjusting the drip rate, or handling emergencies (unlike traditional roller clamps which require both hands to rotate), thus improving rescue efficiency. It is also suitable for scenarios that require single-handed operation, such as emergency rescue and transport, and has high applicability.

[0081] Reference Figure 1 , Figure 6 and Figure 7 In a preferred embodiment, the needle securing module 2 includes:

[0082] Adhesive tape 203 is disposed at the end of the puncture needle 11. The adhesive tape 203 is used to adhere to the patient and assist in fixing the puncture needle 11.

[0083] Two elastic support strips 208 are provided on the adhesive tape 203.

[0084] In this invention, the needle stabilization module 2 further includes:

[0085] Two curing shells 207 are respectively disposed on two elastic support sheets 208, and the inner walls of the two curing shells 207 are in contact with the outer wall of the puncture needle 11.

[0086] Two opening and closing pull straps 204 are respectively disposed on two curing shells 207. The opening and closing pull straps 204 are used to pull the curing shells 207 to separate them.

[0087] In this invention, the needle stabilization module 2 further includes:

[0088] Two delivery pipes 206 are respectively installed on two fixed housings. One end of each delivery pipe 206 is provided with a curing agent chamber 201. The inner wall of each curing agent chamber 201 is provided with a separation membrane 205.

[0089] The annular sleeve 202 is disposed on the two curing shells 207 and the adhesive tape 203. The annular sleeve 202 is used to prevent the puncture point from being exposed.

[0090] Specifically, during puncture, the adhesive tape 203 is placed at the puncture site of the patient. At this time, the opening and closing pull tape 204 is pulled, which causes the opening and closing pull tape 204 to move the solidified shell 207 and deform the elastic support 208 so that the two solidified shells 207 are separated. At this time, the puncture needle 11 is placed between the two solidified shells 207 and the puncture is completed.

[0091] When the needle is fixed, the opening and closing pull strap 204 is not under force. At this time, the elastic support 208 drives the curing shell 207 to be placed on the outer wall of the puncture needle 11. Then, the curing agent chamber 201 is squeezed so that the curing agent components A and B inside are pressured to break the isolation membrane 205 and are transported to the inside of the two curing agent chambers 201 through the delivery tube 206, so that the curing agent components A and B are mixed for curing, thereby curing and fixing the posture of the puncture needle 11.

[0092] After curing, an annular bag 202 is placed between the cured outer shell 207 and the adhesive tape 203 to prevent the puncture point from being exposed and infected;

[0093] In specific application scenarios, the needle stabilization module 2 is suitable for fixing the puncture needle 11. That is, when the needle stabilization module 2 is used, it can solidify and fix the posture of the puncture needle 11 to maintain the angle between the puncture needle 11 and the adhesion strip 203, thereby maintaining the angle between the puncture needle 11 and the patient's body, so as to avoid the puncture needle 11 being in a moving state, thereby avoiding repeated or continuous bending that causes fatigue of the catheter material, thus reducing the risk of catheter rupture, breakage or connector detachment, and increasing the effectiveness of the device.

[0094] Working principle:

[0095] Before the guidewire is pushed, the guidewire body 6 passes through the fixing frame 701. At this time, the tightening spring rod 703 pulls the mounting frame 705, causing the mounting frame 705 to move closer to the fixing frame 701 and apply a certain squeezing force to the guidewire. At the same time, the two gears 708 mesh. Then, the locking handwheel 702 is rotated, causing the locking handwheel 702 to drive the locking push rod 706 to separate from the anti-slip outer ring 712, so as to cancel the locking.

[0096] When pushing the vascular guidewire, rotating the adjustment knob 707 drives one of the shaft members 704 to rotate. At this time, the linkage belt 711 and the linkage wheel 710 enable two of the shaft members 704 to rotate synchronously. At the same time, since the two gear members 708 are meshed, all four shaft members 704 can rotate synchronously. The shaft members 704 on both sides of the vascular guidewire body 6 rotate in opposite directions, so that the shaft members 704 drive the pushing wheel 709 and the anti-slip outer ring 712 to rotate, thereby pushing the vascular guidewire body 6 until it reaches the accurate position, so as to accurately detect the peak of the P wave.

[0097] After the guidewire is pushed, the locking handwheel 702 is rotated so that the locking handwheel 702 drives the locking push rod 706 to contact the outer wall of one of the anti-slip outer rings 712 to lock it and prevent the guidewire from moving and affecting the data during observation.

[0098] During puncture, the adhesive tape 203 is placed at the puncture site of the patient. At this time, the opening and closing pull tape 204 is pulled, which causes the opening and closing pull tape 204 to move the solidified shell 207 and deform the elastic support 208 so that the two solidified shells 207 are separated. At this time, the puncture needle 11 is placed between the two solidified shells 207 and the puncture is completed.

[0099] When the needle is fixed, the opening and closing pull strap 204 is not under force. At this time, the elastic support 208 drives the curing shell 207 to be placed on the outer wall of the puncture needle 11. Then, the curing agent chamber 201 is squeezed so that the curing agent components A and B inside are pressured to break the isolation membrane 205 and are transported to the inside of the two curing agent chambers 201 through the delivery tube 206, so that the curing agent components A and B are mixed for curing, thereby curing and fixing the posture of the puncture needle 11.

[0100] After curing, an annular bag 202 is placed between the cured outer shell 207 and the adhesive tape 203 to prevent the puncture point from being exposed and infected.

[0101] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An external auxiliary device for midline catheter infusion, characterized in that, include: The catheter body (1) has a puncture needle (11) at one end and a threaded connector (10) at the other end. A conduit connector (8) is provided on a threaded connector (10), and a fixing bracket (9) is provided on the conduit connector (8); A rubber sleeve (14) is provided at one end of the conduit connector (8); The vascular guidewire body (6) is located inside the catheter connector (8), the threaded connector (10), the catheter body (1), and the puncture needle (11); Needle stabilization module (2) is disposed on the puncture needle (11). The needle stabilization module (2) is used to maintain the posture of the puncture needle (11) and prevent it from bending repeatedly or continuously. The guide wire pushing unit (7) is mounted on the fixed bracket (9). The guide wire pushing unit (7) is used to stably push the guide wire, prevent accidental errors in guide wire pushing, and increase positioning accuracy and precise detection of P-wave peaks.

2. The external auxiliary device for midline catheter infusion fluid according to claim 1, characterized in that, The guidewire pushing unit (7) includes: A fixed frame (701) is mounted on a fixed bracket (9), and four tensioning spring rods (703) are provided inside the fixed frame (701); The mounting frame (705) is located at one end of the four tension spring rods (703), and both the mounting frame (705) and the fixed frame (701) are provided with two shaft members (704).

3. The external auxiliary device for midline catheter infusion fluid according to claim 2, characterized in that, The guidewire pushing unit (7) also includes: Four push wheels (709) are respectively set on four shaft members (704). The outer walls of the four push wheels (709) are provided with anti-slip outer rings (712). The outer walls of the four anti-slip outer rings (712) are in contact with the outer wall of the vascular guide wire body (6). Adjustment knob (707) is located on one of the shaft members (704).

4. The external auxiliary device for midline catheter infusion fluid according to claim 3, characterized in that, The guidewire pushing unit (7) also includes: Two gear components (708) are respectively disposed on the outer wall of two shaft components (704), and the two gear components (708) mesh with each other; Four linkage wheels (710) are respectively mounted on four shaft members (704), and the outer wall of every two linkage wheels (710) is provided with the same linkage belt (711).

5. The external auxiliary device for midline catheter infusion fluid according to claim 4, characterized in that, The guidewire pushing unit (7) also includes: A locking handwheel (702) is mounted on a fixed frame (701); A locking push rod (706) is mounted on a locking handwheel (702), and one end of the locking push rod (706) contacts the outer wall of one of the anti-slip outer rings (712).

6. The external auxiliary device for midline catheter infusion fluid according to claim 1, characterized in that, The outer wall of the conduit connector (8) is provided with a connecting side tube (4), one end of the connecting side tube (4) is provided with an injection connector (13), and the inner wall of the injection connector (13) is provided with a sealing ring (12).

7. The external auxiliary device for midline catheter infusion fluid according to claim 6, characterized in that, The outer wall of the connecting side tube (4) is provided with a single-handed liquid stop clamp (5), and the syringe body (3) is provided inside the injection connector (13).

8. The external auxiliary device for midline catheter infusion fluid according to claim 1, characterized in that, The needle stabilization module (2) includes: An adhesive tape (203) is provided at the end of the puncture needle (11). The adhesive tape (203) is used to adhere to the patient and help fix the puncture needle (11). Two elastic supports (208) are provided on the adhesive tape (203).

9. The external auxiliary device for midline catheter infusion fluid according to claim 8, characterized in that, The needle stabilization module (2) also includes: Two curing shells (207) are respectively disposed on two elastic support plates (208), and the inner walls of the two curing shells (207) are in contact with the outer wall of the puncture needle (11); Two opening and closing pull straps (204) are respectively disposed on two curing shells (207). The opening and closing pull straps (204) are used to pull the curing shells (207) to separate them.

10. The external auxiliary device for midline catheter infusion fluid according to claim 9, characterized in that, The needle stabilization module (2) also includes: Two delivery pipes (206) are respectively installed on two fixed shells. One end of each delivery pipe (206) is provided with a curing agent chamber (201). The inner wall of each curing agent chamber (201) is provided with a separation membrane (205). An annular pouch (202) is disposed on two cured shells (207) and an adhesive tape (203), the annular pouch (202) being used to prevent the puncture point from being exposed.

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