Fire resistant cable with easy wiring

Abstract

The application discloses a fire-resistant cable convenient for wiring, and relates to the technical field of special cables. The fire-resistant cable comprises a cable tube, a fire-resistant layer arranged in the cable tube, a plurality of power supply wires arranged in the fire-resistant layer, and a joint mechanism arranged at one end of the cable tube. The fire-resistant layer is repeatedly bent and does not affect use. The power supply wires are wound and placed in the cable tube. The joint mechanism is convenient for cable installation and butt joint. The fire-resistant ring and the heat insulation ring are arranged as a spring-shaped metal heat insulation material. When the fire-resistant cable is bent, one end of the spring-shaped fire-resistant ring and the heat insulation ring is close, and the other end is open, so that the bending flexibility of the cable is improved. When the joint position of the fire-resistant cable needs to be installed and butt jointed, the threaded ring arranged in the wiring barrel is screwed and butt jointed to the threaded barrel, so that the installation and butt joint of the fire-resistant cable are more convenient. The rubber barrel plug and the protection plug can keep the particles in the barrel compact, so that the fire-resistant cable has good conductivity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of special cables, in particular to a fire-resistant cable convenient for wiring. BACKGROUND

[0002] Fire-resistant cable refers to a cable that can safely operate for a certain period of time under flame combustion. Fire-resistant cables are widely used in high-rise buildings, underground railways, underground streets, large power plants and important industrial and mining enterprises related to fire safety and fire rescue, such as power supply lines and control lines of emergency facilities such as fire-fighting equipment and emergency guide lights.

[0003] After searching, it is found that the prior art with publication number CN112289496A discloses a multi-core cable with fire-resistant and waterproof functions and a joint device thereof, belonging to the technical field of special cables, which solves the problems of easy damage, poor fire resistance, poor waterproofness and poor high-temperature resistance of existing cable joints, and poor sealing ability of cable joint parts. The invention comprises a cable, a joint A, a joint B, an O-shaped sealing ring, a screw and a nut, the memory alloy arc-shaped piece and the flame retardant component on the cable enable the cable to have automatic fireproofing capability, and the heat dissipation mechanism also enables the cable to have automatic heat dissipation function. The structure of the terminal post and the terminal seat is complementary, ensuring reliable connection of the two sides of the cable, and the terminal post and the terminal seat are uniformly and interval filled with epoxy resin sealing material, which plays a role of mutual insulation and isolation for the terminal post and the terminal seat. Even in a cold and hot alternating environment, the cable can also have good sealing performance, and the impact resistance of the cable is greatly enhanced. The O-shaped sealing ring, the sealing sleeve on the joint A and the sealing sleeve on the joint B can ensure the sealing of the entire structure.

[0004] Compared with ordinary cables, the above-mentioned fire-resistant multi-core cable has a layer of fire-resistant metal ring in the fire-resistant cable, which results in poor flexibility of the fire-resistant cable. In some use scenarios that require frequent movement or bending, the applicability of the fire-resistant cable will be limited, and the bending radius of the cable and the treatment of the joint need to be paid attention to during laying to avoid affecting the performance and service life of the cable due to improper installation, resulting in high installation difficulty of the fire-resistant cable. Therefore, based on the above search and in combination with the existing problems, a fire-resistant cable convenient for wiring is provided. SUMMARY

[0005] The purpose of the present application is to provide a fire-resistant cable convenient for wiring to solve the problems of poor flexibility of the fire-resistant cable and high installation difficulty of the fire-resistant cable mentioned in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The utility model provides a fire -resistant cable convenient to wire, including cable pipe, the inside of cable pipe is provided with the fire -resistant layer that can be repeatedly bent and does not affect use, the inside of fire -resistant layer is wrapped with the multiple live wire that sets up, and the live wire is placed in the inside of cable pipe, the one end of cable pipe is provided with the joint mechanism convenient for cable installation butt joint, and fire -resistant layer replaces the metal fire -resistant material in the original fire -resistant cable with other suitable heat -resistant material, makes fire -resistant cable more easily to bend, and joint mechanism extrudes the joint of fire -resistant cable through the thread, and fire -resistant cable butt joint is more convenient.

[0008] Further, the fire -resistant layer includes fire -resistant ring, and the fire -resistant ring is slidably attached to the inner wall of the cable pipe, the outer wall of the live wire is wrapped with an insulating cylinder, and the live wire is filled with insulating rubber between the insulating cylinder, the insulating cylinder and the rubber, the live wire is wrapped in the cable pipe, and the live wire and the cable pipe are also provided with the fire -resistant ring, so that the live wire is multi -insulated, and the insulation of the cable is ensured.

[0009] Further, the inner wall of the fire -resistant ring is slidably provided with a heat -insulating ring, and the heat -insulating ring and the fire -resistant ring are filled with alumina ceramic particles between the cable pipe, the fire -resistant ring, the heat -insulating ring and the cable pipe are filled with alumina ceramic particles, the melting point of the alumina ceramic particles is as high as 2050 DEG C, and the alumina ceramic particles have good mechanical properties and insulation properties, and can maintain high strength and hardness at high temperature, the alumina ceramic particles are filled in the gap between the fire -resistant ring and the heat -insulating ring, so that the alumina ceramic particles in the cable flow when the cable is bent, and the cable has good fire resistance.

[0010] Further, the joint mechanism includes a wiring cylinder and a butt cylinder, and the butt cylinder is installed at one end of the cable pipe that needs to be butt jointed with the wiring cylinder, a threaded ring is fixedly installed at one end of the butt cylinder close to the wiring cylinder, and a threaded cylinder is slidably arranged on the inner wall of the wiring cylinder close to the threaded ring, when the joint position of the butt jointed fire -resistant cable needs to be installed, the threaded ring arranged in the wiring cylinder is screwed into the threaded cylinder, and the threaded ring and the threaded cylinder are relatively rotated, so that the installation and butt joint of the fire -resistant cable are more convenient.

[0011] Further, the inner wall of the connecting drum and the inner wall of the counter drum are rotationally provided with fixing mechanisms, the fixing mechanisms comprise fixing rings, the fixing rings are respectively screw-mounted on the inner walls of the connecting drum and the counter drum, one end of the fixing ring close to the connecting drum is rotationally provided with a moving ring, the inner walls of the connecting drum and the counter drum are rotationally provided with stop rings, specifically, the connecting drum and the counter drum are sleeved on the outer wall of the cable drum, the fixing ring is rotated, the moving ring starts to move, after the moving ring moves to one side of the stop ring, the stop ring pushes the moving ring to bend, the moving ring bends and extrudes the cable tube, so that the connecting drum and the counter drum are fixed on the outer wall of the cable tube, one end of the moving ring extruding the cable tube is extruded into a barb shape, when the cable tube moves, one end of the moving ring extruding the cable tube continues to bend and extrude the cable tube, the more the force and distance of the movement of the cable tube, the greater the force of the moving ring extruding the cable tube, so that a good fixing effect is achieved, and the connecting drum and the counter drum are prevented from falling off.

[0012] Further, the inner wall of the connecting drum is fixedly provided with a sealing ring, one end of the sealing ring away from the connecting drum is fixedly provided with a mounting ring, the inner wall of the mounting ring is fixedly provided with a plurality of counter pipes, the inner walls of the open ends of the counter pipes are slidably provided with sliding rings, and the inner walls of the sliding rings are fixedly provided with rubber cylinder plugs, specifically, when the counter drum is connected with the connecting drum, the counter pipes are aligned with the extrusion pipes, the extrusion pipes are inserted into the counter pipes, the extrusion pipes push the sliding rings in the counter pipes to move, the electrified metal particles in the counter pipes are extruded and pushed into the extrusion pipes, so that the counter installation is more convenient.

[0013] Further, one end of the counter drum close to the connecting drum is fixedly provided with a material blocking ring, one end of the material blocking ring close to the connecting drum is fixedly provided with a pushing ring, the inner wall of the pushing ring is provided with a plurality of extrusion pipes, the interiors of the counter pipes and the extrusion pipes are placed with electrified metal particles, and the inner wall of the extrusion pipe is fixedly provided with a protective plug, specifically, the above-mentioned electrified metal particles are silver particles in the prior art, the electrical conductivity of silver is the highest among common metals. This means that it can conduct current more efficiently, under the same voltage, silver metal particles can pass through a larger current, thereby better meeting the electrification demand, and silver has relatively stable chemical properties and is not prone to chemical reaction with other substances, so that better performance can be maintained during electrification, the risk of increased resistance or decreased performance due to oxidation, corrosion and other factors is reduced, thereby ensuring the stability and reliability of electrification, and after the temperature at the joint is increased to melt and connect the silver, the silver also has good ductility and can be heated and pulled into particles of various shapes and sizes, the protective plug and the rubber cylinder plug are both provided in the shape of a bucket, one end of the bucket-shaped structure is extruded and tightly sealed to avoid the electrified metal particles in the counter pipe from falling out of the counter pipe when the counter pipe is not connected, and the protective plug and the rubber cylinder plug are extruded and tightly sealed, when the electrified metal particles are extruded and scattered, the protective plug and the rubber cylinder plug expand again to extrude and compact the electrified metal particles.

[0014] Furthermore, an injection screw is fixedly installed at the upper end of the docking cylinder, and a fixing bolt is threaded on the inner wall of the injection screw. A fixing spring is fixedly installed inside the fixing bolt, and a compression bolt is fixedly installed at the end of the fixing spring away from the fixing bolt. Specifically, after docking is completed, alumina ceramic particles are injected into the docking cylinder and the connecting cylinder through the injection screw. The fixing bolt is then used to compress and compact the alumina ceramic particles. Thus, the injected alumina ceramic particles not only compress and fix the docking pipe, but also improve the heat resistance of the fire-resistant cable joint, and also play an insulating and heat-insulating role. At the same time, the compression bolt moves into the fixing bolt and compresses the fixing spring. When the particles in the docking cylinder and the connecting cylinder become loose, the fixing spring pushes the compression bolt to compress the particles again.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention uses a fire-resistant ring and a heat insulation ring as a wound spring-shaped metal heat insulation material. When the fire-resistant cable is bent, one end of the wound spring-shaped fire-resistant ring and the heat insulation ring are close together, while the other end is open, thereby improving the bending flexibility of the cable.

[0017] 2. In this invention, alumina ceramic particles are stored in the gap between the fire-resistant ring and the heat insulation ring. When the cable is bent, the alumina ceramic particles flow in the gap to the opening, so that each position of the fire-resistant cable has good fire resistance. This avoids the fire-resistant material at the bend of the fire-resistant cable being stretched, which would reduce the fire resistance at the bend of the fire-resistant cable. This improves the fire resistance and heat insulation of the cable.

[0018] 3. When it is necessary to install the joint position of the fire-resistant cable, the present invention makes it more convenient to install and connect the fire-resistant cable by threading the threaded ring set in the upper part of the connecting cylinder into the threaded cylinder and rotating the threaded ring and the threaded cylinder relative to each other.

[0019] 4. In this invention, both the protective plug and the rubber plug are shaped like a bucket. One end of the bucket is squeezed and sealed to prevent the electrified metal particles in the connecting pipe from falling out of the connecting pipe when it is not connected. The protective plug and the rubber plug 310 are squeezed together. When the electrified metal particles are squeezed and dispersed, the protective plug and the rubber plug expand and squeeze the electrified metal particles tightly again. The internal rubber plug and the protective plug keep the internal particles compacted and tight, thus providing good conductivity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the junction box structure in this invention;

[0022] Figure 3 Structure diagram of cable tube in the present application;

[0023] Figure 4 Structure diagram of fireproof ring in the present application;

[0024] Figure 5 Structure diagram of mounting ring in the present application;

[0025] Figure 6 Structure diagram of fixing bolt in the present application;

[0026] Figure 7 Structure diagram of fixing ring in the present application;

[0027] Figure 8 Structure diagram of butt joint cylinder in the present application.

[0028] In the figure: 1, cable tube; 101, power wire;

[0029] 2, fireproof layer; 201, fireproof ring; 202, insulation cylinder; 203, rubber; 204, heat insulation ring;

[0030] 3, joint mechanism; 301, joint cylinder; 302, butt joint cylinder; 303, threaded ring; 304, threaded cylinder; 305, strong spring;

[0031] 306, sealing ring; 307, mounting ring; 308, butt joint pipe; 309, sliding ring; 310, rubber cylinder plug;

[0032] 311, material blocking ring; 312, pushing ring; 313, extrusion pipe; 314, protective plug;

[0033] 315, injection screw cylinder; 316, fixing bolt; 317, fixing spring; 318, extrusion bolt;

[0034] 4, fixing mechanism; 401, fixing ring; 402, moving ring; 403, blocking ring. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] Please refer to Figures 1-8The utility model provides a fire -resistant cable convenient to wiring, including cable tube 1, the inside of cable tube 1 is provided with repeatedly bending and not affecting the use fire -resistant layer 2, and the inside of fire -resistant layer 2 is wrapped and is provided with a plurality of live wire 101, specifically, live wire 101 is wrapped in the center of fire -resistant layer 2, so that live wire 101 always keeps in the center position of cable tube 1, and the fire -resistant layer 2 arranged makes fire -resistant cable convenient to bend, and one end of cable tube 1 is provided with the connector mechanism 3 of the cable installation butt joint, specifically, two connector mechanisms 3 are connected through screw thread, so that the connection of fire -resistant cable is replaced more convenient.

[0037] Please see Figures 1-4 Fire -resistant layer 2 includes fire -resistant ring 201, and fire -resistant ring 201 is slidably attached to the inner wall of cable tube 1, and the outer wall of live wire 101 is wrapped with insulating cylinder 202, the outer wall of insulating cylinder 202 is provided with smooth arc surface, so that the sliding on the outer surface of insulating cylinder 202 is more convenient when fire -resistant ring 201 is bent, and the insulating rubber 203 is filled between live wire 101 and insulating cylinder 202, and the above-mentioned rubber 203 has good insulation and temperature resistance, and the rubber also has shock resistance and wear resistance, shock resistance can absorb and dissipate vibration energy, play the role of shock absorption, buffering, wear resistance: have good wear resistance, can withstand long time friction and wear and tear and keep good performance, so that the fire -resistant cable can still keep good state when repeatedly bending, and the insulating cylinder 202 and rubber 203 wrap live wire 101 in cable tube 1, to ensure the insulation of cable.

[0038] Please see Figures 1-4 The inner wall of fire -resistant ring 201 is slidably provided with heat -insulating ring 204, and the above-mentioned fire -resistant ring 201 and heat -insulating ring 204 are provided with metal heat -insulating material, and the fire -resistant ring 201 and heat -insulating ring 204 are provided with coiled spring shape, to improve the bending flexibility of cable, and the coiling direction of fire -resistant ring 201 and heat -insulating ring 204 is opposite, to avoid the pipe of two coiled spring shapes being stuck when bending in the same direction, and the gap between heat -insulating ring 204 and fire -resistant ring 201 and cable tube 1 is filled with alumina ceramic particles, which is not shown in the figure, the melting point of the above-mentioned alumina ceramic particles is as high as 2050 DEG C, has good mechanical properties and insulation performance, and can keep high strength and hardness at high temperature, to ensure the stability of signal transmission, and the main raw material of alumina is abundant in nature, and the price is relatively low, and the production process is relatively mature, so that alumina ceramic has certain cost advantage in large-scale production and application, and the gap between fire -resistant ring 201 and heat -insulating ring 204 is filled with alumina ceramic particles, so that the alumina ceramic particles in the cable flow when the cable is bent, so that the cable keeps good fire resistance.

[0039] Please see Figures 1-8The joint mechanism 3 comprises a terminal cylinder 301 and a butt cylinder 302, and the butt cylinder 302 is installed at one end of the cable tube 1 which needs to be butt-jointed with the terminal cylinder 301, and the terminal cylinder 301 and the butt cylinder 302 are made of silicon carbide ceramic, which has excellent high-temperature resistance and can be used for a long time in a high-temperature environment above 1400 DEG C, and has high hardness and wear resistance, good chemical stability and resistance to corrosion of most acids and bases, so that the joint of the refractory cable can be placed outside for a long time, thereby increasing the service life of the cable joint. The end of the butt cylinder 302 close to the terminal cylinder 301 is fixedly provided with a threaded ring 303, the inner wall of the terminal cylinder 301 close to the threaded ring 303 is slidably provided with a threaded cylinder 304, the threaded ring 303 and the threaded cylinder 304 are matched in thread, the outer wall of the threaded cylinder 304 is provided with a protrusion, the terminal cylinder 301 close to the protrusion of the threaded cylinder 304 is provided with a recess matched with the protrusion, so that the threaded cylinder 304 does not rotate during sliding, and a strong spring 305 is rotatably installed between the threaded cylinder 304 and the terminal cylinder 301. The strong spring 305 is a rectangular spring with high elastic coefficient in the prior art, and the service life of the rectangular spring can be increased by 13%-14% compared with that of the round-section spring. The strong spring 305 installed between the threaded cylinder 304 and the terminal cylinder 301 can prevent the joint from loosening and being damaged, and can also prevent the thread from being stripped. When the joint position of the butt-jointed refractory cable needs to be installed, the threaded ring 303 in the terminal cylinder 301 is screwed into the threaded cylinder 304, the terminal cylinder 301 and the butt cylinder 302 are relatively rotated, the threaded ring 303 is screwed with the threaded cylinder 304, and the installation and butt joint of the refractory cable are more convenient.

[0040] Please refer to Figure 7 、 Figure 8The inner wall of the connecting cylinder 301 is fixedly installed with a sealing ring 306, the sealing ring 306 avoids air from entering the cable pipe 1 through the connecting part, and the material in the cable pipe 1 is weathered and rusted. One end of the sealing ring 306 away from the connecting cylinder 301 is fixedly installed with a mounting ring 307, the mounting ring 307 is blocked at the joint of the cable pipe 1, so that after the refractory cable is cut, the mounting ring 307 extrudes and seals the alumina ceramic particles in the cable pipe 1 after the alumina ceramic particles required are added into the cable pipe 1, the alumina ceramic particles in the cable pipe 1 are prevented from falling off after being connected, so that the refractoriness of the cable is reduced. The inner wall of the mounting ring 307 is fixedly installed with a plurality of butt pipes 308, the butt pipe 308 is matched with the diameter of the power wire 101, the power wire 101 is inserted into the butt pipe 308, the other end of the butt pipe 308 is clamped to form a notch by using a clamp, so that the butt pipe 308 is fixed at one end of the power wire 101. The inner wall of the opening end of the butt pipe 308 is slidably installed with a sliding ring 309, the inner wall of the sliding ring 309 is fixedly installed with a rubber cylinder plug 310, and the inner wall of the other end of the above butt pipe 308 away from the mounting ring 307 is provided with a protruding diameter ring, so that the sliding ring 309 can only slide in the butt pipe 308, the sliding ring 309 is prevented from falling out of the butt pipe 308, and the protruding diameter ring plays a limiting role.

[0041] Please refer to Figure 2 、 Figure 5 The inner wall of the connecting cylinder 301 is fixedly installed with a sealing ring 306, the sealing ring 306 avoids air from entering the cable pipe 1 through the connecting part, and the material in the cable pipe 1 is weathered and rusted. One end of the sealing ring 306 away from the connecting cylinder 301 is fixedly installed with a mounting ring 307, the mounting ring 307 is blocked at the joint of the cable pipe 1, so that after the refractory cable is cut, the mounting ring 307 extrudes and seals the alumina ceramic particles in the cable pipe 1 after the alumina ceramic particles required are added into the cable pipe 1, the alumina ceramic particles in the cable pipe 1 are prevented from falling off after being connected, so that the refractoriness of the cable is reduced. The inner wall of the mounting ring 307 is fixedly installed with a plurality of butt pipes 308, the butt pipe 308 is matched with the diameter of the power wire 101, the power wire 101 is inserted into the butt pipe 308, the other end of the butt pipe 308 is clamped to form a notch by using a clamp, so that the butt pipe 308 is fixed at one end of the power wire 101. The inner wall of the opening end of the butt pipe 308 is slidably installed with a sliding ring 309, the inner wall of the sliding ring 309 is fixedly installed with a rubber cylinder plug 310, and the inner wall of the other end of the above butt pipe 308 away from the mounting ring 307 is provided with a protruding diameter ring, so that the sliding ring 309 can only slide in the butt pipe 308, the sliding ring 309 is prevented from falling out of the butt pipe 308, and the protruding diameter ring plays a limiting role.

[0042] Please refer to Figure 1 、 Figure 8A retaining ring 311 is fixedly installed at one end of the connecting cylinder 302 near the connecting cylinder 301. A pushing ring 312 is fixedly installed at one end of the retaining ring 311 near the connecting cylinder 301. Multiple extrusion tubes 313 are provided on the inner wall of the pushing ring 312. The diameter of the end of the extrusion tube 313 near the connecting pipe 308 matches the inner wall diameter of the connecting pipe 308. Both the connecting pipe 308 and the extrusion tubes 313 contain electrically conductive metal particles. These electrically conductive metal particles are silver particles, which have the highest electrical conductivity among common metals, reaching 6.3 × 10⁻⁶. 7 S / m. This means it can conduct current more efficiently. Under the same voltage, silver metal particles can carry a larger current, thus better meeting the needs of electrical conduction. Furthermore, silver is chemically stable and does not easily react with other substances, maintaining good performance during electrical conduction and reducing the risk of increased resistance or performance degradation due to oxidation, corrosion, etc., thereby ensuring the stability and reliability of electrical conduction. Simultaneously, if the temperature at the joint rises and melts the silver, silver also has good ductility and can be heated and stretched into particles of various shapes and sizes, facilitating its use in different application scenarios. Whether making small conductive connection points or larger conductive components, silver can meet the requirements through appropriate processing techniques. Specifically, when the extrusion tube 313 is inserted into the connecting tube 308, the extrusion tube 313 pushes the sliding ring 309 in the connecting tube 308 to move, and keeps the extrusion tube 313 sealed after insertion into the connecting tube 308, preventing the extrusion tube 313 from falling off the electrically conductive metal particles in the connecting tube 308. The compression tube 313 simultaneously compresses the energized metal particles in the connecting tube 308. When the connecting tube 302 aligns with the connecting tube 301, the connecting tube 308 and the compression tube 313 are aligned. The compression tube 313 is then inserted into the connecting tube 308, pushing the sliding ring 309 in the connecting tube 308 to move, thus compressing and pushing the energized metal particles in the connecting tube 308 into the compression tube 313. This makes the connection and installation more convenient. A protective plug 314 is fixedly installed on the inner wall of the compression tube 313 for protection. Both the plug 314 and the rubber plug 310 are designed in the shape of a bucket. One end of the bucket is squeezed and sealed to prevent the electrified metal particles in the connecting pipe 308 from falling out of the connecting pipe 308 when it is not connected. The protective plug 314 and the rubber plug 310 are squeezed together. When the electrified metal particles are squeezed and scattered, the high elasticity of the rubber can produce a large deformation under a small external force. When the external force is removed, it can quickly return to its original shape, so that the protective plug 314 and the rubber plug 310 expand and squeeze the electrified metal particles tightly again.

[0043] Please see Figures 2-6The upper end of the butt joint cylinder 302 is fixedly provided with an injection screw cylinder 315, and the injection screw cylinder 315 is in communication with the butt joint cylinder 302, the inner wall of the injection screw cylinder 315 is threadedly provided with a fixing bolt 316, after butt joint, the alumina ceramic particles are injected into the butt joint cylinder 302 and the joint cylinder 301 through the injection screw cylinder 315, and the alumina ceramic particles are extruded and compacted by using the fixing bolt 316, so that the injected alumina ceramic particles not only extrude and fix the butt joint pipe 308, but also improve the heat resistance of the fire-resistant cable joint, and meanwhile, the fixing bolt 316 is internally fixedly provided with a fixing spring 317, one end of the fixing spring 317 away from the fixing bolt 316 is fixedly provided with an extrusion bolt 318, when the fixing bolt 316 is installed, the extrusion bolt 318 is moved into the fixing bolt 316 to extrude and fix the fixing spring 317, and when the particles in the butt joint cylinder 302 and the joint cylinder 301 are loose, the fixing spring 317 pushes the extrusion bolt 318 to compact the particles again.

[0044] The working principle of the present application is that when the cable is bent, the fire-resistant ring 201 and the heat insulation ring 204 have better flexibility than the metal heat insulation material in the existing fire-resistant cable, and when the fire-resistant cable is bent, the fire-resistant ring 201 and the heat insulation ring 204 are spring-bent on one side and are closed on the other side, so that the force required by the staff when bending the fire-resistant cable is reduced, and the fire-resistant cable can still maintain a good state when repeatedly bent, so that the fire-resistant cable can be frequently moved or bent.

[0045] The gap between the fire-resistant ring 201 and the heat insulation ring 204 stores alumina ceramic particles, so that after the cable is bent, the alumina ceramic particles flow to the open position in the gap, so that each position of the fire-resistant cable has good fire resistance, avoiding that the fire resistance of the bent position of the fire-resistant cable is reduced due to the stretching of the fire-resistant material after the fire-resistant cable is bent, thereby improving the fire resistance and heat insulation of the cable.

[0046] At the same time, when the butt joint fire-resistant cable is installed, the fixing mechanism 4 is fixed at the joint of the cable, the extrusion pipe 313 is inserted into the butt joint pipe 308, the butt joint cylinder 302 and the joint cylinder 301 are rotated, the live metal particles in the butt joint pipe 308 are extruded and pushed into the extrusion pipe 313, and the live metal particles in the butt joint pipe 308 and the extrusion pipe 313 are mixed and firmly extruded, so that the installation of the butt joint fire-resistant cable is more convenient.

[0047] After the extrusion tube 313 is inserted into the butt joint tube 308, the protective plug 314 is pressed and attached to the rubber cylinder plug 310, both of which are made of rubber. When the electrified metal particles are extruded and dispersed, the high elasticity of the rubber can produce a large deformation under a small external force, and the rubber can quickly return to its original shape after the external force is removed. The protective plug 314 and the rubber cylinder plug 310 are inflated again to extrude and compact the electrified metal particles, thereby avoiding poor contact at the connection of the fire-resistant cable.

[0048] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes within the scope of the present application according to the technical solution and the inventive concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A fire-resistant cable that is easy to wire, comprising a cable conduit, characterized in that: The cable conduit has a fire-resistant layer inside that can be bent repeatedly without affecting its use. Multiple conductive wires are wrapped inside the fire-resistant layer and are coiled and placed inside the cable conduit. One end of the cable conduit is provided with a connector mechanism to facilitate cable installation and connection. The connector mechanism includes a terminal cylinder and a docking cylinder, and the docking cylinder is installed at the end of the cable pipe that needs to be docked with the terminal cylinder. A threaded ring is fixedly installed at the end of the docking cylinder near the terminal cylinder, and a threaded cylinder is slidably arranged on the inner wall of the terminal cylinder near the threaded ring. A sealing ring is fixedly installed on the inner wall of the terminal block. An installation ring is fixedly installed on the end of the sealing ring away from the terminal block. Multiple connecting pipes are fixedly installed on the inner wall of the installation ring. Sliding rings are slidably installed on the inner wall of the opening end of each connecting pipe. A rubber plug is fixedly installed on the inner wall of the sliding ring. A retaining ring is fixedly installed at one end of the docking cylinder near the wiring cylinder, and a pushing ring is fixedly installed at the end of the retaining ring near the wiring cylinder; The inner wall of the push ring is provided with multiple extrusion tubes, and the inside of the connecting tube and the extrusion tubes is filled with electrically conductive metal particles. A protective plug is fixedly installed on the inner wall of the extrusion tube. An injection screw is fixedly installed at the upper end of the docking cylinder, and a fixing bolt is threaded on the inner wall of the injection screw. A fixing spring is fixedly installed inside the fixing bolt, and a clamping bolt is fixedly installed at the end of the fixing spring away from the fixing bolt.

2. The fire-resistant cable for easy wiring according to claim 1, characterized in that: The fire-resistant layer includes a fire-resistant ring, which is slidably attached to the inner wall of the cable conduit. An insulating cylinder is wrapped around the outer wall of the wire, and insulating rubber is filled between the wire and the insulating cylinder.

3. The fire-resistant cable for easy wiring according to claim 2, characterized in that: A heat insulation ring is slidably disposed on the inner wall of the fire-resistant ring, and alumina ceramic particles are filled between the heat insulation ring, the fire-resistant ring and the cable pipe.

4. A fire-resistant cable that is easy to wire according to claim 1, characterized in that: The inner walls of both the connector tube and the docking tube are rotatably equipped with fixing mechanisms. Each fixing mechanism includes a fixing ring, which is threaded onto the inner walls of the connector tube and the docking tube respectively. A movable ring is rotatably provided at the end of the fixing ring near the connector tube. A retaining ring is rotatably installed on the inner walls of both the connector tube and the docking tube.

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