Flame-retardant coating repairing device for underground cable

Abstract

The invention provides a flame-retardant coating repairing device for an underground cable, and belongs to the technical field of flame-retardant coating repairing for underground cables.The flame-retardant coating repairing device for the underground cable comprises an arc-shaped plate, a sealing piece, a stamping spraying assembly and an infrared illuminating lamp assembly, the arc-shaped plate corresponds to the section of the underground cable, and the sealing piece is arranged on the arc-shaped plate; a gap is formed between the cable and the surface of the underground cable contacted with the cable; connecting assemblies are arranged on the periphery of the arc-shaped plate and used for adjusting the using position of the coating repairing device. The sealing piece is movably connected with the arc-shaped plate; the side, away from the cable, of the arc-shaped plate is connected with the stamping and spraying assembly in a penetrating mode. The infrared illuminating lamp assembly is arranged on one side of the surface, making contact with the sealing piece, of the arc-shaped plate; the invention provides a flame-retardant coating repairing device for an underground cable. The flame-retardant coating repairing device can solve the problems that an existing flame-retardant coating repairing device for the underground cable is insufficient in repairing thickness, long in curing time, insufficient in flexibility and low in efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of flame retardant coating repair for underground cables, and in particular relates to a flame retardant coating repair device for underground cables. Background Art

[0002] Flame retardant coatings can effectively slow down the spread of flames, reduce the risk of fire, and protect the surrounding environment and personnel safety. The coating can resist the erosion of the external environment, such as moisture, chemicals and mechanical damage, thereby extending the service life of the cable. Flame retardant coatings can enhance the insulation performance of cables, reduce the risk of short circuits and leakage, and ensure the stable operation of power systems. In the event of a fire, flame retardant materials usually release less smoke and toxic gases, reducing the harm to personnel.

[0003] The flame retardant coating of underground cables may be damaged due to a variety of reasons, mainly including the following aspects: During construction or maintenance, the impact, squeezing or scratching of heavy objects may cause damage to the coating; foundation settlement or soil erosion may also cause displacement or distortion of the cable, thereby damaging the coating; chemical substances in the underground environment (such as acids, alkalis, salts, etc.) may react with the coating, causing the coating to degrade or peel off; leakage of surrounding liquids (such as oil, chemical solvents) will accelerate the corrosion of the coating; drastic changes in temperature may cause cracks in the coating due to thermal expansion and contraction; being in a high temperature environment for a long time may cause the coating to age, become brittle or melt; although underground cables are not exposed to sunlight most of the time, if part of the cable is exposed, ultraviolet rays may accelerate the degradation of the coating; certain microorganisms (such as bacteria and fungi) grow in a humid environment and may cause biodegradation of the coating.

[0004] Flame retardant coating repair devices for underground cables are important. The integrity of the flame retardant coating is directly related to the safety of the cable in the event of a fire. Timely repair of coating damage can effectively prevent the spread of flames and reduce the risk of fire. Repairing the coating can prevent the external environment from eroding and damaging the cable, reduce the aging rate of the cable, and thus extend its service life. Through efficient repair devices, coating damage can be quickly handled, maintenance time can be reduced, the continuous operation of the cable system can be guaranteed, and economic losses can be reduced. Timely repairs can avoid more extensive damage, reduce the high cost of replacing cables later, and reduce overall maintenance costs. Repairing rather than replacing damaged cables helps reduce the generation of solid waste, which is in line with the concept of sustainable development. The repaired coating can restore the flame retardant properties of the cable and ensure its reliability under extreme conditions, especially in hot or humid environments.

[0005] The existing underground cable flame retardant coating repair device has insufficient repair thickness, long curing time, insufficient flexibility and low efficiency. Summary of the invention

[0006] In view of this, the present invention provides a flame retardant coating repair device for underground cables, which can solve the problems of insufficient repair thickness, long curing time, insufficient flexibility and low efficiency of the existing flame retardant coating repair device for underground cables.

[0007] The present invention is achieved in that:

[0008] The present invention provides a flame retardant coating repair device for underground cables, which includes an arc plate, a seal, a stamping and spraying assembly, and an infrared lamp assembly. The arc plate is arranged corresponding to the cross section of the underground cable, a gap is arranged between the arc plate and the surface of the underground cable in contact, and a seal is arranged around the arc plate and the surface of the underground cable; the arc plate includes a plurality of arc plates, and a connecting assembly is arranged around the arc plate for adjusting the use position size of the coating repair device to avoid waste of the flame retardant coating; the seal is movably connected to the arc plate; the side of the arc plate away from the cable is connected to the stamping and spraying assembly, which is used to push the flame retardant coating into the damaged gap by stamping to form a good seal and protection; the infrared lamp assembly is arranged on one side of the surface of the arc plate in contact with the seal, and the infrared lamp assembly is used to accelerate the curing process of the flame retardant coating by infrared lamps to improve the repair efficiency and the adhesion of the coating;

[0009] Reflection components are fixed around the infrared lamp component, and the reflection components are used to evenly disperse the infrared light, so as to make the infrared light curing effect uniform and not cause temperature concentration to reduce damage to the cable.

[0010] The technical effects of the flame retardant coating repair device for underground cables provided by the present invention are as follows: the arc-shaped plate is designed to correspond to the cross-section of the underground cable, ensuring that it fits tightly to the cable surface and provides necessary support and protection. There is a gap between it and the cable surface, so that the coating can be evenly distributed to avoid damage caused by direct contact. In addition, the design of the arc-shaped plate allows the combination of multiple plates, and the use position and size of the repair device can be flexibly adjusted through the connection assembly, reducing the waste of coating materials.

[0011] On the basis of the above technical solution, the flame retardant coating repair device for underground cables of the present invention can also be improved as follows:

[0012] The infrared lamp assembly includes a housing, a heat dissipation fin, a lamp body and a temperature sensor. The housing is dispersedly fixed on one side of the arc plate close to the cable and is fixedly connected to the arc plate by bolts. The heat dissipation fin is arranged at the position where the arc plate is fixed with the housing. The lamp body is fixed inside the housing and is used to generate infrared light. The heat dissipation fin is used to reduce the operating temperature of the lamp body during operation. The heat dissipation fin is connected through the outer side of the arc plate.

[0013] The shell is made of aluminum alloy or heat-resistant plastic to ensure that the shell will not be deformed or damaged during operation;

[0014] The temperature sensor is arranged inside the arc plate, and is used to monitor the heat in the sealed environment between the arc plate and the cable surface in real time.

[0015] Furthermore, the housing adopts a streamlined structure to reduce air resistance and improve air circulation to promote heat dissipation;

[0016] The heat dissipation fins adopt a streamlined structure to increase the surface area to improve the heat dissipation efficiency;

[0017] A heat-insulating sealing pad is provided between the shell and the arc-shaped plate to prevent the cable from being damaged by high heat during operation of the lamp body.

[0018] Furthermore, the reflective component is a parabolic structure, the interior of which is arranged in a wave shape, so as to disperse the infrared light to the repair while avoiding the infrared light from being concentrated at one point to improve the curing efficiency.

[0019] Furthermore, the stamping spray assembly includes a dispersion pipe, a stamping pipe and a stamping machine. The dispersion pipe is connected through the side of the arc plate away from the cable and is fixed at the center of the overall structure formed by the arc plate; the stamping pipe is connected through the dispersion pipe, and the other end of the stamping pipe is fixedly connected to the output end of the stamping machine, so as to provide a flame retardant coating raw material with stamping force;

[0020] The dispersion pipe, the punching pipe, and the output shaft of the punching machine are on the same horizontal plane to avoid obstruction of the punching force of the punching machine.

[0021] Furthermore, a plurality of parabolic structures are arranged inside the dispersion tube, one side of which is fixedly connected and arranged at the center of the dispersion tube, and is used to transport the flame retardant coating raw material with punching force to various positions of the arc plate to spray the coating on the damaged position of the cable;

[0022] The focal positions of the multiple parabolic structures are symmetrically arranged around the central position of the dispersion pipe; a through hole is arranged at the central position of the parabolic structure for conveying the flame retardant coating raw material to the central position.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the stamping spray assembly pushes the flame retardant coating raw material to the damaged part of the cable at a certain pressure through the stamping tube. The design of the assembly ensures that the dispersion tube, stamping tube and stamping machine output shaft are on the same horizontal plane to avoid affecting the coating spraying effect due to improper alignment. The configuration of multiple parabolic structures helps to evenly distribute the coating, ensuring that the coating can fully cover the damaged area of ​​the cable to form an effective protective layer.

[0024] Furthermore, a transparent polycarbonate plate is provided on one side of the infrared lamp assembly close to the cable surface, and a gap of less than 5-8 mm is reserved between the transparent polycarbonate plate and the cable surface.

[0025] Furthermore, the seal is a sealing ring with a U-shaped structure, the central recess of which is arranged at the bottom of the arc plate, and the side wall is fixedly connected to the arc plate; the seal is made of rubber material, and reinforcing ribs are arranged inside it. The reinforcing ribs are distributed in a spiral shape and are used to enhance the strength and elasticity of the seal to improve the sealing performance.

[0026] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the seal is movably connected to the arc plate to form a reliable sealing environment. Its U-shaped structure provides excellent sealing performance, and the central recessed position helps to cover the cable and prevent the external environment from affecting the coating. The design of using rubber material and spiral reinforcement ribs enhances the strength and elasticity of the seal, thereby improving the overall sealing effect and ensuring effective protection of the coating.

[0027] Furthermore, the connecting component includes a protrusion and a groove, and the shapes of the protrusion and the groove match each other; triangular protrusions are fixed at both sides of the front end of the protrusion, and the triangular protrusions are made of hard rubber; triangular grooves are arranged on both sides of the inside of the groove;

[0028] Pressing plates are arranged on both sides of the inner wall of the groove, and the pressing plates are fixedly connected to the groove via springs.

[0029] Furthermore, the center position of the arc plate is set to a pleated structure for adjusting the curvature of the cable to enhance its applicability.

[0030] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: Transparent polycarbonate plate: In order to protect the cable surface, small gaps are set to ensure effective heat dissipation and avoid direct contact.

[0031] Connection components: The matching design of protrusions and grooves provides a stable fixing method, while the triangular protrusions enhance the grip.

[0032] Pleated structure: Enhances the adaptability of the curved plate, enabling it to better fit cables of different curvatures, further improving the versatility of the repair device.

[0033] Compared with the prior art, the beneficial effects of a flame-retardant coating repair device for underground cables provided by the present invention are as follows:

[0034] The arc-shaped plate is arranged corresponding to the cross-section of the underground cable through a pleated structure, forming a protective cover suitable for the shape of the cable, improving the applicability of the arc-shaped plate, and enabling it to better adapt to cables of different models and sizes. A gap is provided between it and the cable surface, enabling the coating to evenly penetrate into the damaged area, and at the same time providing a certain space to avoid overheating. Multiple arc-shaped plates adjust the use position and size through a connection component, avoiding coating waste, and ensuring the accuracy and effectiveness of repair. The convex and concave structures are adjustable, ensuring a stable connection under different cable diameters and providing a flexible repair solution.

[0035] The seal is movably connected to the arc-shaped plate to form a sealing ring, ensuring the sealing performance of the repair area. Its U-shaped structure design enhances the sealing performance, and the internal reinforcing ribs improve the strength and elasticity, which can effectively prevent the intrusion of external moisture and pollutants and protect the long-term stability of the repaired part.

[0036] The stamping and spraying component pushes the flame-retardant coating into the damaged gap through stamping, forming a good seal and protection. The parabolic structure design in the dispersion tube enables the coating to be evenly distributed to each position of the arc-shaped plate, improving the spraying coverage effect. At the same time, ensure that the output shaft of the stamping machine is on the same horizontal plane as other components, avoiding interference with the stamping force and ensuring the effective spraying of the coating.

[0037] The infrared lamp component is located on one side of the arc-shaped plate, and accelerates the curing process of the flame-retardant coating through heating. The equipped temperature sensor can real-time monitor the temperature in the sealed environment to ensure that it will not cause damage to the cable. The parabolic-like structure and the wavy internal design of the reflection component effectively disperse the infrared light, avoid temperature concentration, enhance the curing efficiency, and at the same time reduce the potential thermal damage to the cable. The heat dissipation fins and the streamlined housing improve the heat dissipation efficiency, protecting the cable from high temperature. The heat insulation effectively isolates the high heat generated by the lamp body, further ensuring the safety of the cable. A small gap is set to ensure the lighting effect while avoiding direct contact with the cable and reducing the risk of damage. Brief Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1It is a structural schematic diagram of a flame retardant coating repair device for underground cables;

[0040] Figure 2 It is a schematic diagram of the structure of the stamping and spraying assembly;

[0041] Figure 3 It is a schematic diagram of the structure of the infrared lamp assembly and the reflector assembly;

[0042] Figure 4 is a schematic diagram of the structure of the connection components;

[0043] Figure 5 is a schematic diagram of the cross-sectional structure of the groove;

[0044] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0045] 10. curved plate; 11. connecting assembly; 111. protrusion; 112. groove; 20. sealing member; 30. stamping and spraying assembly; 31. dispersion pipe; 32. stamping pipe; 33. stamping machine; 40. infrared lamp assembly; 41. housing; 42. heat sink fin; 43. lamp body; 44. temperature sensor; 50. reflection assembly. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0047] like Figure 1-5 As shown, it is a structural schematic diagram of a flame retardant coating repair device for underground cables provided by the present invention, in which the device includes an arc plate 10, a seal 20, a stamping and spraying assembly 30 and an infrared lamp assembly 40. The arc plate 10 is arranged corresponding to the cross section of the underground cable, and a gap is arranged between the arc plate 10 and the surface of the underground cable in contact, and a seal 20 is arranged around the arc plate 10 and the surface of the underground cable; the arc plate 10 includes a plurality of arc plates, and a connecting assembly 11 is arranged around the arc plate 10 for adjusting the use position size of the coating repair device to avoid waste of the flame retardant coating; the seal 20 is movably connected to the arc plate 10; the side of the arc plate 10 away from the cable is connected to the stamping and spraying assembly 30, which is used to push the flame retardant coating into the damaged gap by stamping to form a good seal and protection; the side of the surface of the arc plate 10 in contact with the seal 20 is provided with an infrared lamp assembly 40, and the infrared lamp assembly 40 is used to accelerate the curing process of the flame retardant coating by infrared lamps to improve the repair efficiency and the adhesion of the coating;

[0048] A reflective assembly 50 is fixed around the infrared lamp assembly 40. The reflective assembly 50 is used to evenly disperse the infrared light so as to make the infrared light curing effect uniform and not cause temperature concentration to reduce damage to the cable.

[0049] The materials and characteristics of the flame retardant coating for underground cables are:

[0050] 1. Polyvinyl chloride (PVC)

[0051] Features: PVC is an economical and practical material with good chemical resistance and moisture resistance.

[0052] Flame retardancy: PVC treated with flame retardants can slow the spread of flames in the event of a fire and usually meets multiple flame retardant standards.

[0053] Application: Widely used in sheath of general power cables and communication cables.

[0054] 2. Cross-linked polyethylene (XLPE)

[0055] Features: XLPE is a modified polyethylene with excellent heat resistance and mechanical strength, suitable for high temperature and high pressure environments.

[0056] Flame retardancy: Cross-linking treatment makes it more stable under high temperature conditions and has better flame retardant effect.

[0057] Application: Commonly used in high voltage cables and some special application cables.

[0058] 3. Low smoke zero halogen material (LSZH)

[0059] Features: LSZH materials produce very little smoke and toxic gases when burned, and are suitable for use in closed or poorly ventilated places.

[0060] Flame retardant: This type of material achieves flame retardancy through physical and chemical means and meets higher safety standards.

[0061] Application: Widely used in cables in subways, tunnels and large buildings to improve personnel safety.

[0062] 4. Polyethylene (PE)

[0063] Features: Polyethylene is a material with good insulation properties and chemical resistance, and is often used for the inner insulation of cables.

[0064] Flame retardancy: Certain modified versions (such as flame retardant polyethylene) can improve its safety in fire conditions.

[0065] Application: Suitable for low voltage cables and communication cables.

[0066] 5. Inorganic flame retardants

[0067] Types: Common inorganic flame retardants include aluminum hydroxide, magnesium hydroxide, inorganic salts, etc.

[0068] Features: These materials release moisture at high temperatures, reducing temperatures and inhibiting flame propagation, usually without releasing toxic gases.

[0069] Application: It is mostly used to enhance the flame retardant properties of polymers and is widely used in the coating of various cables.

[0070] 6. Other composite materials

[0071] Features: Some new materials combine multiple functions, such as flame retardancy, wear resistance, UV resistance, etc., to further improve the comprehensive performance of cables.

[0072] Application: These composite materials are often used in demanding environments, such as cables in wind power, marine engineering and other fields.

[0073] Among them, in the above technical solution, the infrared lamp assembly 40 includes a shell 41, a heat dissipation fin 42, a lamp body 43 and a temperature sensor 44. The shell 41 is dispersedly fixed on one side of the arc plate 10 close to the cable and is fixedly connected to the arc plate 10 by bolts; the heat dissipation fin 42 is arranged at the position where the shell 41 is fixed on the arc plate 10; the lamp body 43 is fixed inside the shell 41 and is used to generate infrared light; the heat dissipation fin 42 is used to reduce the working temperature of the lamp body 43 when it is running; the heat dissipation fin 42 is connected to the outer side of the arc plate 10;

[0074] The housing 41 is made of aluminum alloy or heat-resistant plastic to ensure that the housing 41 will not be deformed or damaged during operation;

[0075] A temperature sensor 44 is disposed inside the arc plate 10 , and the temperature sensor 44 is used to monitor the heat in the sealed environment between the arc plate 10 and the cable surface in real time.

[0076] Furthermore, in the above technical solution, the housing 41 adopts a streamlined structure to reduce air resistance and improve air circulation to promote heat dissipation;

[0077] The heat dissipation fins 42 adopt a streamlined structure to increase the surface area to improve the heat dissipation efficiency;

[0078] A heat-insulating sealing pad is provided between the housing 41 and the arc-shaped plate 10 to prevent the high heat of the lamp body 43 from damaging the cable when it is in operation.

[0079] Furthermore, in the above technical solution, the reflective component 50 is a parabolic structure, and its interior is arranged in a wavy shape, which is used to disperse the infrared light to the repair while avoiding the infrared light from being concentrated at one point to improve the curing efficiency.

[0080] Further, in the above technical solution, the stamping spray assembly 30 includes a dispersion pipe 31, a stamping pipe 32 and a stamping machine 33. The dispersion pipe 31 is connected to the side of the arc plate 10 away from the cable and is fixed at the center of the overall structure formed by the arc plate 10; the stamping pipe 32 is connected to the dispersion pipe 31, and the other end of the stamping pipe 32 is fixedly connected to the output end of the stamping machine 33, so as to provide a flame retardant coating raw material with a stamping force;

[0081] The dispersion pipe 31 , the punching pipe 32 , and the output shaft of the punching machine 33 are on the same horizontal plane to avoid blocking the punching force of the punching machine 33 .

[0082] Further, in the above technical solution, a plurality of parabolic structures are arranged inside the dispersion tube 31, one side of which is fixedly connected and arranged at the center of the dispersion tube 31, and is used to transport the flame retardant coating raw material with punching force to various positions of the curved plate 10 to spray the coating on the damaged position of the cable;

[0083] The focal positions of the multiple parabolic structures are symmetrically arranged around the central position of the dispersion tube 31; a through hole is arranged at the central position of the parabolic structure for conveying the flame retardant coating raw material to the central position.

[0084] Furthermore, in the above technical solution, a transparent polycarbonate plate is provided on one side of the infrared lamp assembly 40 close to the cable surface, and a gap of less than 5-8 mm is reserved between the transparent polycarbonate plate and the cable surface.

[0085] Furthermore, in the above technical solution, the seal 20 is a sealing ring with a U-shaped structure, the central recess of which is set at the bottom of the arc plate 10, and the side wall is fixedly connected to the arc plate 10; the seal 20 is made of rubber material, and reinforcing ribs are arranged inside it, and the reinforcing ribs are spirally distributed for enhancing the strength and elasticity of the seal 20 to improve the sealing performance.

[0086] Further, in the above technical solution, the connecting component 11 includes a protrusion 111 and a groove 112, and the shapes of the protrusion 111 and the groove 112 match each other; triangular protrusions are fixed at both sides of the front end of the protrusion 111, and the triangular protrusions are made of hard rubber; triangular grooves are arranged on both sides of the inside of the groove 112;

[0087] Pressing plates are provided on both sides of the inner wall of the groove 112 , and the pressing plates are fixedly connected to the groove 112 via springs.

[0088] Furthermore, in the above technical solution, the center position of the arc plate 10 is set to a pleated structure for adjusting the curvature of the cable to enhance its applicability.

[0089] Example 1: Modular design

[0090] Modular curved plates: The core part of the patch device is composed of multiple detachable curved plates, the shape and size of each plate can be adjusted according to the diameter and shape of the cable. Each curved plate is connected by snaps or bolts, which is convenient for users to replace and combine according to actual needs.

[0091] Connection components: The connection components with quick-release design make the installation and removal process fast and convenient. Users can easily remove or replace the curved plate by simply pressing the release button, saving maintenance time.

[0092] The main advantages are:

[0093] Flexibility: Adapts to different types and sizes of cables, enhancing the versatility of the patching device.

[0094] Easy maintenance: The modular design makes subsequent maintenance and replacement of parts easier without the need for special tools.

[0095] Example 2: Double-layer sealing structure

[0096] Double-layer seal: The outer layer is made of high-temperature resistant material (such as silicone or polyurethane), and the inner layer is made of elastic rubber. The combination of the two forms double protection, the outer layer resists high temperature and chemical corrosion, and the inner layer ensures good elasticity and sealing.

[0097] Sealing groove design: A sealing groove is provided on the edge of the device to facilitate better fit of the cable surface when installing the seal, reducing the risk of water and air leakage.

[0098] The main advantages are:

[0099] Durability: The double-layer structure improves the sealing performance, allowing the repair device to maintain good working condition in high temperature and harsh environments.

[0100] Reliability: Enhanced sealing design effectively prevents external pollutants and liquid intrusion, extending the service life of the cable.

[0101] Example 3: Integrated cooling system

[0102] Infrared lamp assembly: The repair device is equipped with an infrared lamp to accelerate the curing process of the repair material. There are heat dissipation fins around the lamp to increase the heat dissipation efficiency.

[0103] Air circulation design: There are multiple vents at the bottom of the device to ensure free air circulation, enhance heat dissipation, and avoid affecting the repair quality due to excessive temperature.

[0104] The main advantages are:

[0105] Safety: The integrated heat dissipation system effectively reduces the heat generated by the equipment during operation, reducing the potential damage to cables and repair materials caused by overheating.

[0106] High efficiency: Through the optimized heat dissipation structure, the curing process is accelerated, the efficiency of repair is improved, and the downtime is shortened.

[0107] Specifically, the principle of the present invention is: when in use, ensure that the repair area is clean, free of dust and oil; check the damage of the cable to ensure the necessity of repair. Bend the arc plate according to the shape and diameter of the cable; fix the arc plate around the cable. Install the sealing device on the edge of the arc plate to form a sealing ring. Ensure that the seal is in good contact with the cable surface to prevent coating leakage. Start the stamping spray assembly to evenly spray the flame retardant coating to the repair area. Adjust the pressure and speed of the spraying as needed to ensure uniform coverage of the coating. Start the infrared lamp assembly and adjust the heating time and temperature. Use a temperature sensor to monitor the temperature of the repair area to ensure safe curing. After curing is completed, check the integrity and sealing of the repair area. Perform necessary cable function tests to ensure its normal operation.

Claims

1. A flame retardant coating repair device for underground cables, characterized in that: The invention comprises an arc-shaped plate (10), a sealing member (20), a stamping and spraying assembly (30) and an infrared lamp assembly (40); the arc-shaped plate (10) is arranged corresponding to the cross section of an underground cable, a gap is arranged between the arc-shaped plate (10) and the surface of the underground cable in contact, and a sealing member (20) is arranged around the arc-shaped plate and the surface of the underground cable; the arc-shaped plate (10) comprises a plurality of arc-shaped plates, and a connecting assembly (11) is arranged around the arc-shaped plate to adjust the size of the use position of the coating repair device to avoid waste of the flame retardant coating; the sealing member (20) is arranged around the arc-shaped plate (10) ... 0) is movably connected to the arc plate (10); the side of the arc plate (10) away from the cable is connected to the stamping and spraying assembly (30) for pushing the flame retardant coating into the damaged gap by stamping to form a good seal and protection; the side of the surface of the arc plate (10) in contact with the sealing member (20) is provided with the infrared lamp assembly (40), and the infrared lamp assembly (40) is used to accelerate the curing process of the flame retardant coating by infrared lamps to improve the repair efficiency and the adhesion of the coating; A reflective component (50) is fixed around the infrared lamp component (40), and the reflective component (50) is used to evenly disperse infrared light, so as to make the infrared light curing effect uniform and not cause temperature concentration, thereby reducing damage to the cable.

2. A flame retardant coating repair device for underground cables according to claim 1, characterized in that: The infrared lamp assembly (40) comprises a shell (41), heat dissipation fins (42), a lamp body (43) and a temperature sensor (44); the shell (41) is dispersedly fixed on a side of the arc plate (10) close to the cable and is fixedly connected to the arc plate (10) by bolts; the heat dissipation fins (42) are arranged at the position where the arc plate (10) is fixed with the shell (41); the lamp body (43) is fixed inside the shell (41) and is used to generate infrared light; the heat dissipation fins (42) are used to reduce the operating temperature of the lamp body (43) when it is in operation; the heat dissipation fins (42) are connected through the outer side of the arc plate (10); The housing (41) is made of aluminum alloy or heat-resistant plastic to ensure that the housing (41) will not be deformed or damaged during operation; The temperature sensor (44) is arranged inside the arc plate (10), and the temperature sensor (44) is used to monitor the heat in the sealed environment between the arc plate (10) and the cable surface in real time.

3. A flame retardant coating repair device for underground cables according to claim 2, characterized in that: The housing (41) adopts a streamlined structure to reduce air resistance, improve air circulation and promote heat dissipation; The heat dissipation fins (42) adopt a streamlined structure to increase the surface area and improve the heat dissipation efficiency; A heat-insulating sealing pad is provided between the housing (41) and the arc-shaped plate (10) to prevent the cable from being damaged by high heat generated when the lamp body (43) is in operation.

4. A flame retardant coating repair device for underground cables according to claim 3, characterized in that: The reflective component (50) is a parabola-like structure, the interior of which is arranged in a wave shape, so as to disperse the infrared light to the repair while avoiding the infrared light from being concentrated at one point to improve the curing efficiency.

5. A flame retardant coating repair device for underground cables according to claim 4, characterized in that: The stamping spray assembly (30) comprises a dispersion pipe (31), a stamping pipe (32) and a stamping machine (33); the dispersion pipe (31) is connected to the side of the arc plate (10) away from the cable and is fixed at the center of the overall structure formed by the arc plate (10); the stamping pipe (32) is connected to the dispersion pipe (31) and the other end of the stamping pipe (32) is fixedly connected to the output end of the stamping machine (33) for providing a flame retardant coating raw material with a stamping force; The dispersion pipe (31), the punching pipe (32), and the output shaft of the punching machine (33) are on the same horizontal plane, so as to avoid blocking the punching force of the punching machine (33).

6. A flame retardant coating repair device for underground cables according to claim 5, characterized in that: A plurality of parabolic structures are arranged inside the dispersion tube (31), one side of which is fixedly connected and arranged at the center of the dispersion tube (31), and is used to transport the flame retardant coating raw material with punching force to various positions of the arc plate (10) so as to spray the coating on the damaged position of the cable; The focal positions of the multiple parabolic structures are symmetrically arranged around the central position of the dispersion pipe (31); a through hole is arranged at the central position of the parabolic structure for conveying the flame retardant coating raw material to the central position.

7. A flame retardant coating repair device for underground cables according to claim 6, characterized in that: A transparent polycarbonate plate is arranged on one side of the infrared lamp assembly (40) close to the cable surface, and a gap of less than 5-8 mm is reserved between the transparent polycarbonate plate and the cable surface.

8. A flame retardant coating repair device for underground cables according to claim 7, characterized in that: The sealing member (20) is a sealing ring with a U-shaped structure, the central recess of which is arranged at the bottom of the arc plate (10), and the side wall is fixedly connected to the arc plate (10); the sealing member (20) is made of rubber material, and reinforcement ribs are arranged inside the sealing member, and the reinforcement ribs are distributed in a spiral shape, and are used to enhance the strength and elasticity of the sealing member (20) to improve the sealing performance.

9. A flame retardant coating repair device for underground cables according to claim 8, characterized in that: The connecting component (11) comprises a protrusion (111) and a groove (112), the shapes of the protrusion (111) and the groove (112) matching each other; triangular protrusions are fixed at both sides of the front end of the protrusion (111), and the triangular protrusions are made of hard rubber; triangular grooves are arranged on both sides of the interior of the groove (112); Pressing plates are provided on both sides of the inner wall of the groove (112), and the pressing plates are fixedly connected to the groove (112) via a spring.

10. A flame retardant coating repair device for underground cables according to claim 9, characterized in that: The central position of the arc-shaped plate (10) is arranged as a pleated structure, which is used to adjust the curvature of the cable to enhance its applicability.

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