Composite integral sealing method and device for conduit fault maintenance

Abstract

The invention provides a composite integral sealing method for conduit fault maintenance, and relates to the technical field of conduit maintenance. The method includes: arranging a sealing layer on the outer surface of a conduit fault area; a reinforcing layer is arranged on the outer side of the sealing layer; a conduit fault area is placed in the conduit maintenance sealing device; after the shaping solution is added into the conduit maintenance sealing device, the conduit fault area is heated through the conduit maintenance sealing device, and curing and shaping are completed. According to the invention, temporary maintenance of the faulted conduit can be realized, and the requirement of temporary takeoff of an airplane is met. In addition, the invention further provides a catheter maintenance sealing device, the catheter maintenance sealing device comprises a heating assembly, a first shell and a second shell, the first shell and the second shell are detachably connected, a fixing assembly is arranged between the first shell and the second shell, a cavity used for containing the catheter is formed between the first shell and the second shell, and the heating assembly is arranged in the cavity.

Description

Technical Field

[0001] This application relates to the technical field of conduit maintenance, and particularly to a method and device for composite integral sealing for conduit fault maintenance. Background Art

[0002] The function of aviation conduits on an aircraft is to transport various media to parts such as the landing gear and cockpit, meeting the various requirements of the aircraft's fuel, hydraulic, environmental control and other systems. However, during the operation of the aircraft, it will experience high temperature, low temperature, high pressure, and frequent pressure changes, often accompanied by working conditions such as vibration, bending, and impact, resulting in leakage or even rupture of the conduits. If these phenomena are not resolved in a timely manner, it will affect the normal operation of the entire aircraft system and even lead to serious consequences.

[0003] Currently, the maintenance method for these phenomena is to remove the faulty conduit and replace it with a new one. Since the new conduit needs to be remanufactured, this type of method has a long maintenance cycle, causing the aircraft to be unable to fly normally for a short period of time. Therefore, there is an urgent need for an efficient and low-cost method to solve conduit fault maintenance, ensuring that the aircraft can fly for a period of time and then be replaced after the new conduit is manufactured.

[0004] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present disclosure. Therefore, it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] The main purpose of this application is to provide a method and device for composite integral sealing for conduit fault maintenance, which can achieve temporary maintenance of faulty conduits and meet the needs of the aircraft for temporary takeoff.

[0006] To solve the foregoing technical problems, this application provides a method for composite integral sealing for conduit fault maintenance, which includes setting a sealing layer on the outer surface of the conduit fault area;

[0007] Setting a strengthening layer outside the sealing layer;

[0008] Putting the conduit fault area into a conduit maintenance sealing device;

[0009] After adding a shaping solution into the conduit maintenance sealing device, heating the conduit fault area through the conduit maintenance sealing device to complete curing and shaping.

[0010] Optionally, in some embodiments of the present invention, the step of setting a sealing layer on the outer surface of the conduit fault area includes: winding and wrapping a polymer adhesive tape around the outer surface of the conduit fault area to form a closed rubber sealing layer.

[0011] Optionally, in some embodiments of the present invention, the above-mentioned polymer adhesive tape includes any one of natural rubber self-adhesive tape, butyl rubber self-adhesive tape, ethylene-propylene rubber self-adhesive tape, and silicone rubber self-adhesive tape.

[0012] Optionally, in some embodiments of the present invention, the step of arranging the reinforcing layer outside the sealing layer includes: completely winding and wrapping the fiber-reinforced composite material around the outside of the glue sealing layer to form the reinforcing layer.

[0013] Optionally, in some embodiments of the present invention, the above-mentioned fiber-reinforced composite material includes any one of glass fiber-reinforced composite material, carbon fiber-reinforced composite material, and aramid fiber-reinforced composite material.

[0014] Optionally, in some embodiments of the present invention, after adding the shaping solution into the catheter repair sealing device and heating the faulty area of the catheter through the catheter repair sealing device, before completing the curing and shaping, it further includes: mixing carbon fiber composite powder and epoxy resin according to a weight ratio of 1:10 to form the shaping solution.

[0015] Optionally, in some embodiments of the present invention, the step of heating the faulty area of the catheter through the catheter repair sealing device after adding the shaping solution into the catheter repair sealing device and completing the curing and shaping includes: the temperature range of the heat treatment is 80 °C, and the heat preservation time range is 30 minutes.

[0016] Optionally, in some embodiments of the present invention, after adding the shaping solution into the catheter repair sealing device and heating the faulty area of the catheter through the catheter repair sealing device and completing the curing and shaping, it further includes: after the catheter repair sealing device cools down to room temperature, opening the catheter repair sealing device and taking out the repaired catheter.

[0017] In addition, to achieve the above object, the present application further provides a catheter repair sealing device, including an installation shell and a heating component;

[0018] The installation shell includes a first shell and a second shell that are detachably connected to each other. The installation shell is provided with a fixing component for fixing the first shell and the second shell. A cavity for placing the catheter is formed between the first shell and the second shell, and the heating component is arranged in the cavity.

[0019] Optionally, in some embodiments of the present invention, the above-mentioned fixing component includes a clamp and a bolt used in cooperation. The clamp clamps the first shell and the second shell, and the bolt is used to adjust the clamping strength of the clamp.

[0020] Optionally, in some embodiments of the present invention, the installation shell is provided with exhaust holes and injection holes at intervals.

[0021] The beneficial effects that the present application can achieve.

[0022] A method and device for composite integral sealing for catheter fault repair proposed in an embodiment of the present application include the following steps:

[0023] A sealing layer is provided on the outer surface of the catheter fault area;

[0024] A reinforcing layer is provided outside the sealing layer;

[0025] The catheter fault area is placed into a catheter repair sealing device;

[0026] After adding a shaping solution into the catheter repair sealing device, the catheter fault area is heated through the catheter repair sealing device to complete curing and shaping.

[0027] That is, a sealing layer, a reinforcing layer, and a solution curing layer are sequentially provided outside the fault part of the catheter. Among them, the contact surface between the sealing layer and the catheter is closely attached, thereby solving the sealing difficulty problems caused by the irregular surface and variable diameter of the catheter.

[0028] By providing a reinforcing layer, when the catheter bears an internal pressure load, the load is jointly borne by the pipe wall and the reinforcing layer. The reinforcing layer applies an external pressure to the sealing layer and the outer wall of the catheter, improving the pressure-bearing capacity of the leakage area of the catheter.

[0029] By setting a shaping solution to fix and seal the sealing layer and the reinforcing layer, it can not only further increase the pressure on the reinforcing layer, the sealing layer, and the catheter fault, improving the overall fastening effect; at the same time, it can also prevent the fragments of the fiber-reinforced composite material from falling into other working systems when the reinforcing layer is damaged by the internal pressure, improving the overall safety.

[0030] While greatly improving the sealing performance and pressure-bearing capacity of the catheter, it also takes into account the overall safety.

[0031] By providing a device specifically for the method of composite integral sealing, it is used to soak the solution and heat the outside of the catheter after the sealing layer and the reinforcing layer are provided, so that a solid protective layer is formed outside the reinforcing layer. Thus, the temporary repair of the faulty catheter is realized, meeting the temporary takeoff requirements of the aircraft. Description of the Drawings

[0032] Figure 1 It is a schematic flow chart of the composite integral sealing process method for catheter fault repair provided by an embodiment of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the composite integral sealing device for catheter fault repair provided by an embodiment of the present invention;

[0034] Figure 3 It is a schematic structural diagram of the first housing provided by an embodiment of the present invention;

[0035] Figure 4 Structural schematic diagram of the second housing provided by an embodiment of the present invention;

[0036] Figure 5 Structural schematic diagram of the first housing installed on the second housing provided by an embodiment of the present invention;

[0037] Figure 6 Front view of the first housing provided by an embodiment of the present invention;

[0038] Figure 7 Front view of the second housing provided by an embodiment of the present invention;

[0039] Figure 8 Side view of the first housing provided by an embodiment of the present invention;

[0040] Figure 9 Side view of the second housing provided by an embodiment of the present invention;

[0041] Figure 10 Side view of the first housing installed on the second housing provided by an embodiment of the present invention.

[0042] Icons: 1 - First housing, 2 - Second housing, 3 - Clamp, 4 - Bolt, 5 - Heating component, 6 - Exhaust hole, 7 - Injection hole.

[0043] The realization of the purpose of this application, functional features and advantages will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0046] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0048] The following further describes the present invention in detail with reference to the accompanying drawings so that those skilled in the art can implement it according to the description in the specification.

[0049] As an important component of an aircraft, the duct undertakes the transmission tasks of media such as liquids and gases, and its normal operation is crucial for the safety and stability of the aircraft. However, during actual use, due to various reasons such as material aging, external force damage, or design defects, the duct often experiences faults such as leakage and breakage, seriously affecting the normal flight of the aircraft.

[0050] Currently, the maintenance method for these phenomena is to remove the faulty duct and replace it with a new one. Since the new duct needs to be remanufactured, this type of method has a long maintenance cycle and also causes the aircraft to be unable to fly normally for a short period of time. Therefore, there is an urgent need for an efficient and low-cost method to solve the maintenance of duct faults to ensure that the aircraft can fly for a period of time and then be replaced after the new duct is manufactured.

[0051] To achieve the above object,

[0052] Referring to Figure 1 , the first embodiment of the present application provides a composite integral sealing process method and device for duct fault maintenance, including the following steps:

[0053] S1. Set a sealing layer on the outer surface of the conduit failure area;

[0054] In a specific implementation process, the outer surface of the conduit failure area is integrally wound and wrapped with a rubber self-adhesive tape to form a closed rubber layer, which is the sealing layer. Since the rubber self-adhesive tape has high elasticity, self-adhesiveness and mutual adhesiveness, and has the properties of anti-exposure to sunlight and high temperature resistance, after being stretched and then wound around the conduit, the pressure between the rubber self-adhesive tape and the conduit can be increased, making the contact surface between the two closely fit. After winding, the rubber self-adhesive tape forms a highly elastic sealing film, making the contact surface between the sealing layer and the conduit closely fit, thus solving the sealing difficulty problems caused by the irregular surface and variable diameter of the conduit.

[0055] In addition, as an organic polymer material, rubber has a certain degree of swelling. When it comes into contact with the leaked organic solvent, its volume will expand, making the rubber layer combine more closely with the conduit and the fiber-reinforced composite material; and because the rubber self-adhesive tape has mutual adhesiveness, the inner surface of the sealing layer adheres to the conduit and the outer surface adheres to the fiber-reinforced composite material, further improving the anti-leakage performance and ensuring the overall sealing performance.

[0056] It should be noted that the rubber self-adhesive tape in this embodiment includes but is not limited to natural rubber self-adhesive tape, butyl rubber self-adhesive tape, ethylene-propylene rubber self-adhesive tape, silicone rubber self-adhesive tape and other viscoelastic polymer adhesives.

[0057] S2. Set a strengthening layer outside the sealing layer;

[0058] In a specific implementation process, in this embodiment, the fiber-reinforced composite material is wound outside the sealing layer to completely cover the sealing layer, so as to achieve the effect of pressurizing and reinforcing the inner layer, which is the strengthening layer.

[0059] The fiber-reinforced composite material has the characteristic of high ultimate tensile strength in the main fiber direction. When the conduit bears the internal pressure load, the load is jointly borne by the pipe wall and the fiber-reinforced composite material. The fiber-reinforced composite material exerts an external pressure on the inner layer rubber and the outer wall of the conduit, improving the pressure-bearing capacity of the leaked area of the conduit.

[0060] By setting the strengthening layer, when the conduit bears the internal pressure load, the load is jointly borne by the pipe wall and the strengthening layer. The strengthening layer exerts an external pressure on the sealing layer and the outer wall of the conduit, improving the pressure-bearing capacity of the leaked area of the conduit.

[0061] It should be noted that the fiber-reinforced composite material in this embodiment includes but is not limited to glass fiber reinforced composite material (GFRP), carbon fiber reinforced composite material (CFRP), aramid fiber reinforced composite material (AFRP) and other composite materials formed by winding, molding or extrusion of reinforcing fiber materials and matrix materials.

[0062] S3. Place the catheter failure area into the catheter repair sealing device;

[0063] In a specific implementation process, install the heating component 5 in the cavity inside the first housing 1 and the second housing 2, then place the failure area of the catheter into the cavity, and leave a certain gap between the catheter and the inner side wall of the cavity.

[0064] Furthermore, the first housing 1 and the second housing 2 are detachably connected by setting a clamping block and a clamping groove, and the cavity can be opened or closed by clamping the second housing 2 to the first housing 1, so as to facilitate placing the catheter into the cavity.

[0065] Optionally, the first housing 1 and the second housing 2 of this embodiment are rotatably connected by a rotating shaft, and the cavity can be opened or closed by rotating the first housing 1 relative to the second housing 2, so as to facilitate placing the catheter into the cavity.

[0066] S4. After adding the sizing solution into the catheter repair sealing device, perform a heating treatment on the catheter failure area through the catheter repair sealing device to complete curing and shaping.

[0067] In a specific implementation process, first prepare the sizing solution by mixing carbon fiber composite powder and epoxy resin according to a weight ratio of 1:8 - 1:12 to form a sizing solution with suspended matter.

[0068] Subsequently, add the prepared sizing solution into the catheter repair sealing device installed on the catheter, so that the sizing solution can cover the outside of the reinforcement layer. Heat the sizing solution through the heating device in the catheter repair sealing device, so that the sizing solution cures and deforms, thereby forming a composite material layer that completely covers the reinforcement layer outside the reinforcement layer. In this way, it can further pressurize the reinforcement layer, the sealing layer and the catheter failure area to improve the overall fastening effect; at the same time, it can prevent the fragments of the fiber-reinforced composite material from falling off into other working systems when the reinforcement layer is damaged by internal pressure, greatly improving the sealing performance and pressure-bearing capacity of the catheter while also taking into account the overall safety.

[0069] Among them, the heating temperature range is 70°C - 90°C, preferably 80°C, and the heat preservation time range is 25 - 35 minutes, most preferably 30 minutes, so that the sizing solution completes curing and shaping. After the catheter repair sealing device cools down to room temperature, where the room temperature is usually 30°C or below, take out the repaired catheter from the catheter repair sealing device to complete the entire repair step.

[0070] By setting up a device specifically for the composite integral sealing process method, it is used to soak and heat the outer side of the conduit after setting the sealing layer and the strengthening layer, so that a solid protective layer is formed outside the strengthening layer. Thus, the temporary repair of the faulty conduit is realized to meet the demand for the temporary takeoff of the aircraft.

[0071] Next, for the composite integral sealing method for conduit fault repair in this embodiment, especially for the weight ratio of carbon fiber composite powder to epoxy resin, it will be verified through experimental examples below.

[0072] Example 1:

[0073] The carbon fiber composite powder and epoxy resin are proportioned by weight ratio of 1:8 to form the shaping solution.

[0074] After adding the corresponding proportion of the shaping solution into the conduit repair and sealing device, the faulty area of the conduit is heated by the conduit repair and sealing device with a heating temperature range of 80°C and a heat preservation time range of 30 minutes.

[0075] Thus, the curing and shaping of the shaping solution relative to the conduit are completed.

[0076] Example 2:

[0077] The carbon fiber composite powder and epoxy resin are proportioned by weight ratio of 1:10 to form the shaping solution.

[0078] After adding the corresponding proportion of the shaping solution into the conduit repair and sealing device, the faulty area of the conduit is heated by the conduit repair and sealing device with a heating temperature range of 80°C and a heat preservation time range of 30 minutes.

[0079] Thus, the curing and shaping of the shaping solution relative to the conduit are completed.

[0080] Example 3:

[0081] The carbon fiber composite powder and epoxy resin are proportioned by weight ratio of 1:12 to form the shaping solution.

[0082] After adding the corresponding proportion of the shaping solution into the conduit repair and sealing device, the faulty area of the conduit is heated by the conduit repair and sealing device with a heating temperature range of 80°C and a heat preservation time range of 30 minutes.

[0083] Thus, the curing and shaping of the shaping solution relative to the conduit are completed.

[0084] Comparative Example 1:

[0085] The carbon fiber composite powder and epoxy resin are proportioned by weight ratio of 1:6 to form the shaping solution.

[0086] After adding the sizing solution with the corresponding ratio into the catheter repair sealing device, heat treatment is carried out on the faulty area of the catheter through the catheter repair sealing device, with the heating temperature range being 80 °C and the heat preservation time range being 30 minutes.

[0087] Thus, the sizing solution is cured and shaped relative to the catheter.

[0088] Comparative Example 2:

[0089] Mix carbon fiber composite powder and epoxy resin in a weight ratio of 1:14 to form the sizing solution.

[0090] After adding the sizing solution with the corresponding ratio into the catheter repair sealing device, heat treatment is carried out on the faulty area of the catheter through the catheter repair sealing device, with the heating temperature range being 80 °C and the heat preservation time range being 30 minutes.

[0091] Thus, the sizing solution is cured and shaped relative to the catheter.

[0092] Test the hardness and adhesion of the sizing solution obtained in Examples 1-3 and Comparative Examples 1-2 of the present application after molding. The test results are shown in Table 1 below.

[0093] Table 1

[0094] Weight ratio Hardness Adhesion Experimental Example 1 1:8 115 4000 mPa·s Experimental Example 2 1:10 125 4100 mPa·s Experimental Example 3 1:12 130 4300 mPa·s Comparative Example 1 1:6 100 3900 mPa·s Comparative Example 2 1:14 135 4500 mPa·s

[0095] From the foregoing Experimental Examples 1-3 and Comparative Examples 1-2, it can be learned that when the heating temperature is in the range of 70 °C - 90 °C, and the weight ratio of carbon fiber composite powder to epoxy resin is between 1:8 - 1:12, the hardness and adhesion of the sizing solution after molding are the best. When the ratio of carbon fiber composite powder is too heavy, it will cause the hardness of the sizing solution after molding to be high but the adhesion to be low, and it is easy for the sizing solution to fall off; when the ratio of epoxy resin is too heavy, it will cause the adhesion of the sizing solution after molding to be good but the hardness to be low, resulting in a poor protection effect of the sizing solution after molding.

[0096] As an alternative implementation, referring to Figure 2 - Figure 3 , the second embodiment of the present application provides a specific structure of a composite integral sealing device for catheter fault repair, including a mounting shell and a heating assembly 5;

[0097] The mounting shell includes a first shell 1 and a second shell 2 that are detachably connected to each other. The mounting shell is provided with a fixing assembly for fixing the first shell 1 and the second shell 2. A cavity for placing the catheter is formed between the first shell 1 and the second shell 2, and the heating assembly 5 is arranged in the cavity.

[0098] The installation shell of this embodiment is a cylindrical structure with a hollow interior. The cavity inside the installation shell is also cylindrical, and the width of the cavity is greater than the diameter of the conduit's faulty part after the closed layer and the reinforcement layer are set. At the same time, both ends of the installation hole can achieve sealing of the internal space with the conduit.

[0099] Specifically, the first shell 1 and the second shell 2 are two semi-cylindrical structures separated along the axial direction of the installation shell. During use, the first shell 1 and the second shell 2 are respectively attached from both ends of the faulty part of the conduit to clamp the faulty part of the conduit. Then, the prepared setting solution is added into the internal cavity of the installation shell. Through the heating component 5 arranged between the first shell 1 and the second shell 2, the setting solution can be heated to make it solidify by heating.

[0100] Sealing rings made of elastic materials such as rubber or silica gel can be set at the openings on both sides of the installation shell, which can play a role in preventing the setting solution from leaking.

[0101] Among them, exhaust holes 6 and a material injection hole 7 are arranged at intervals on the top of the installation shell. The material injection hole 7 is used to inject the setting solution into the cavity, and the exhaust hole 6 is used for exhausting during the heating and solidification process. The diameters of both the exhaust hole 6 and the material injection hole 7 can be determined according to specific requirements.

[0102] During the specific implementation process, the first shell 1 is arranged above the second shell 2. The exhaust hole 6 and the material injection hole 7 are arranged on the top of the first shell 1. The heating component 5 can use two heating resistors arranged at intervals, and the two heating resistors are inserted into the second shell 2.

[0103] It should be noted that using two heating resistors arranged at intervals in this embodiment is only a preferred method of this embodiment. In other embodiments, electric heating wires can also be arranged around inside the first shell 1 and the second shell 2 for heating, so that the heating is more uniform.

[0104] During the specific implementation process, referring to Figure 2, the fixing component of this embodiment includes a clamp 3 and a bolt 4 used in cooperation. The number of clamps 3 is two, which are respectively arranged at both ends of the first shell 1. The clamp 3 will clamp the first shell 1 and the second shell 2, and the bolt 4 is used to adjust the clamping strength of the clamp 3.

[0105] Among them, the bolt 4 can use a wing nut 4.

[0106] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, obviously, this application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of this application.

Claims

1. A method for composite integral sealing for catheter fault repair, characterized in that: A sealing layer is provided on the outer surface of the catheter fault area; A reinforcing layer is provided outside the sealing layer; The catheter fault area is placed into a catheter repair sealing device; After adding a shaping solution into the catheter repair sealing device, the catheter fault area is heat-treated through the catheter repair sealing device to complete curing and shaping.

2. The method of composite integral sealing for catheter failure repair according to claim 1, wherein, The step of providing a sealing layer on the outer surface of the catheter fault area includes: Wrapping a polymer adhesive tape around the outer surface of the catheter fault area to form a closed rubber sealing layer.

3. The method of composite integral sealing for catheter fault repair according to claim 2, characterized in that: The polymer adhesive tape includes any one of natural rubber self-adhesive tape, butyl rubber self-adhesive tape, ethylene-propylene rubber self-adhesive tape, and silicone rubber self-adhesive tape.

4. The method for composite integral sealing for catheter failure repair according to claim 1, characterized in that, The step of providing a reinforcing layer outside the sealing layer includes: Completely wrapping a fiber-reinforced composite material around the outside of the rubber sealing layer to form a reinforcing layer.

5. The method of composite integral sealing for catheter failure repair according to claim 4, characterized in that: The fiber-reinforced composite material includes any one of glass fiber-reinforced composite material, carbon fiber-reinforced composite material, and aramid fiber-reinforced composite material.

6. The method for composite integral sealing for catheter failure repair according to claim 1, characterized in that Before adding the shaping solution into the catheter repair sealing device and heat-treating the catheter fault area through the catheter repair sealing device to complete curing and shaping, it further includes: Mixing carbon fiber composite powder and epoxy resin according to a weight ratio of 1:8 - 1:12 to form the shaping solution.

7. The method of composite integral sealing for catheter failure repair according to claim 1, characterized in that, The step of adding the shaping solution into the catheter repair sealing device and heat-treating the catheter fault area through the catheter repair sealing device to complete curing and shaping includes: The temperature range of the heat treatment is 70°C - 90°C, and the heat preservation time range is 25 - 35 minutes.

8. The method for composite integral sealing for catheter failure repair according to claim 1, characterized in that, After adding the shaping solution into the catheter repair sealing device and heat-treating the catheter fault area through the catheter repair sealing device to complete curing and shaping, it further includes: After the catheter repair sealing device cools down to room temperature, opening the catheter repair sealing device and taking out the repaired catheter.

9. A catheter repair sealing device for the method of composite integral sealing according to any one of claims 1-8, characterized in that: It includes an installation shell and a heating component; The installation shell includes a first shell and a second shell that are detachably connected to each other. The installation shell is provided with a fixing component for fixing the first shell and the second shell. A cavity for placing a catheter is formed between the first shell and the second shell, and the heating component is arranged in the cavity.

10. The composite integral sealing device for catheter failure repair according to claim 9, characterized in that: The fixing component includes a clamp and a bolt used in cooperation. The clamp clamps the first shell and the second shell, and the bolt is used to adjust the clamping strength of the clamp.

11. The composite integral sealing device for catheter failure repair according to claim 9, wherein: The installation shell is provided with exhaust holes and injection holes at intervals.

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