Fire-resistant cable convenient for wiring

Abstract

The invention discloses a fire-resistant cable convenient for wiring, and relates to the technical field of special cables, the fire-resistant cable convenient for wiring comprises a cable tube, a fire-resistant layer which is repeatedly bent and does not affect use is arranged in the cable tube, a plurality of electrified wires are wrapped in the fire-resistant layer, and the electrified wires are wound and placed in the cable tube. According to the invention, the fireproof ring and the heat insulation ring are made of coiled spring-shaped metal heat insulation materials, when the fireproof cable is bent, one end of the coiled spring-shaped fireproof ring and one end of the coiled spring-shaped heat insulation ring are close to each other, and the other end of the coiled spring-shaped fireproof ring and the other end of the coiled spring-shaped heat insulation ring are opened, so that the bending flexibility of the cable is improved; when a joint position of a butt joint fireproof cable needs to be installed, the threaded ring arranged in the wiring cylinder is in threaded butt joint with the interior of the threaded cylinder, so that installation and butt joint of the fireproof cable are more convenient, internal particles can be kept compact through the rubber cylinder plug and the protective plug, and good conductivity is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of special cables, in particular to a fire-resistant cable which is convenient for wiring. Background Art

[0002] Fire-resistant cables are cables that can maintain safe operation for a certain period of time under flame conditions. Fire-resistant cables are widely used in high-rise buildings, subways, underground streets, large power stations, and important industrial and mining enterprises and other places related to fire safety and firefighting and lifesaving, such as power supply lines and control lines for emergency facilities such as fire-fighting equipment and emergency guide lights.

[0003] After searching, it was found that the prior art publication number is CN112289496A, which discloses a multi-core cable with fire-resistant and waterproof functions and its connector device, which belongs to the field of special cable technology and solves the problems that the existing cable connectors are easy to be damaged, have poor fire resistance, waterproof and high temperature resistance, and poor sealing ability of the cable connector. The invention includes a cable, a connector A, a connector B, an O-ring, a screw and a nut. The memory alloy arc sheet and the flame retardant component on the cable make the cable have automatic fireproof ability, and the heat dissipation mechanism also makes the cable have automatic heat dissipation function. The structures of the terminal and the terminal seat are complementary to ensure that the cables on both sides are connected reliably. The terminal and the terminal seat are filled with epoxy resin potting glue at uniform intervals around, which plays a role of mutual insulation and isolation between the terminal and the terminal seat. Even in a hot and cold alternating environment, the cable can be guaranteed to have good sealing, and the impact resistance of the cable is greatly enhanced. The O-ring, the sealing sleeve on the connector A, and the sealing sleeve on the connector B can ensure the sealing of the entire structure.

[0004] Compared with ordinary cables, the above-mentioned existing fire-resistant multi-core cables have a layer of fire-resistant metal ring in them, which makes the fire-resistant cables less flexible. In some usage scenarios that require frequent movement or bending, their applicability will be limited. When laying fire-resistant cables, attention should be paid to the bending radius of the cables, the handling of the joints, etc., to avoid affecting the performance and service life of the cables due to improper installation, which makes the installation of fire-resistant cables difficult. Therefore, based on the above search and combined with the existing problems, a fire-resistant cable that is easy to connect is provided. Summary of the invention

[0005] The object of the present invention is to provide a fire-resistant cable that is easy to connect, so as to solve the problems of poor flexibility and high installation difficulty of the fire-resistant cable mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A fire-resistant cable that is easy to connect, comprising a cable tube, wherein the interior of the cable tube is provided with a fire-resistant layer that can be bent repeatedly without affecting use, the interior of the fire-resistant layer is wrapped with a plurality of conducting wires, and the conducting wires are wound and placed inside the cable tube, and one end of the cable tube is provided with a joint mechanism that is convenient for cable installation and docking. The fire-resistant layer makes the fire-resistant cable easier to bend by replacing the metal refractory material in the original fire-resistant cable with other suitable heat-resistant materials, and the joint mechanism makes the docking of the fire-resistant cables more convenient by squeezing the joints of the fire-resistant cables through threads.

[0008] Furthermore, the fire-resistant layer includes a fire-resistant ring, and the fire-resistant ring is slidably fitted on the inner wall of the cable pipe, the outer wall of the live wire is wrapped with an insulating tube, and insulating rubber glue is filled between the live wire and the insulating tube. The insulating tube and the rubber glue wrap the live wire in the cable pipe, and a fire-resistant ring is also arranged between the live wire and the cable pipe, so that the live wire has multiple layers of insulation, thereby ensuring the insulation of the cable.

[0009] Furthermore, a heat-insulating ring is slidingly provided on the inner wall of the refractory ring, and alumina ceramic particles are filled between the heat-insulating ring and the refractory ring and the cable tube. The refractory ring, the heat-insulating ring and the cable tube provided between the conducting wire and the cable tube have a melting point of up to 2050°C, and have good mechanical and insulating properties, and can maintain high strength and hardness even at high temperatures. Alumina ceramic particles are used to fill the gap between the refractory ring and the heat-insulating ring, so that when the cable is bent, the alumina ceramic particles in the cable flow, thereby allowing the cable to maintain good fire resistance.

[0010] Furthermore, the joint mechanism includes a wiring barrel and a docking barrel, and the docking barrel is installed at the end of the cable tube that needs to be docked with the wiring barrel, and a threaded ring is fixedly installed on the end of the docking barrel close to the wiring barrel, and a threaded barrel is slidably provided on the inner wall of the wiring barrel close to the threaded ring. When the joint position for docking the fire-resistant cable needs to be installed, the threaded ring set in the wiring barrel is threadedly docked into the threaded barrel, and the threaded ring and the threaded barrel are relatively rotated, so that the installation and docking of the fire-resistant cable is more convenient.

[0011] Furthermore, the inner walls of the wiring barrel and the docking barrel are rotatably provided with a fixing mechanism, the fixing mechanism includes a fixing ring, and the fixing ring is respectively threadedly installed on the inner walls of the wiring barrel and the docking barrel, and the fixing ring is rotatably provided with a moving ring near one end of the wiring barrel, and the inner walls of the wiring barrel and the docking barrel are rotatably provided with a retaining ring. Specifically, the wiring barrel and the docking barrel are put on the outer wall of the cable barrel, and the fixing ring is rotated to make the moving ring start to move. After the moving ring moves to one side of the retaining ring, the retaining ring pushes the moving ring to bend, so that the moving ring bends and squeezes the cable tube, thereby fixing the wiring barrel and the docking barrel on the outer wall of the cable tube, and one end of the moving ring squeezing the cable tube is squeezed into a barb shape. When the cable tube moves, the one end of the moving ring squeezing the cable tube continues to bend and squeeze the cable tube. The more force and distance the cable tube moves, the greater the force of the moving ring squeezing the cable tube, thereby playing a good fixing role to prevent the wiring barrel and the docking barrel from falling off.

[0012] Furthermore, a sealing ring is fixedly installed on the inner wall of the wiring barrel, a mounting ring is fixedly installed on the end of the sealing ring away from the wiring barrel, a plurality of docking tubes are fixedly installed on the inner wall of the mounting ring, sliding rings are slidably installed on the inner walls of the opening ends of the docking tubes, and a rubber tube plug is fixedly installed on the inner wall of the sliding ring. Specifically, when the docking tube and the wiring barrel are docked, the docking tube is aligned with the extrusion tube, the extrusion tube is inserted into the docking tube, and the extrusion tube pushes the sliding ring in the docking tube to move, so that the energized metal particles in the docking tube are squeezed and pushed into the extrusion tube, thereby making the docking installation more convenient.

[0013] Furthermore, a retaining ring is fixedly installed on one end of the docking tube close to the wiring tube, and a pushing ring is fixedly installed on one end of the retaining ring close to the wiring tube. A plurality of extrusion tubes are arranged on the inner wall of the pushing ring. Energized metal particles are placed inside the docking tubes and the extrusion tubes, and a protective plug is fixedly installed on the inner wall of the extrusion tube. Specifically, the above-mentioned electrically-carrying metal particles are silver particles in the prior art, and 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 a larger current, thereby better meeting the needs of power supply. The chemical properties of silver are relatively stable and it is not easy to react chemically with other substances. It can maintain good performance during the power supply process and reduce the risk of increased resistance or performance degradation due to oxidation, corrosion and other factors, thereby ensuring the stability and reliability of power supply. At the same time, if the temperature at the joint rises and the silver melts and connects, silver also has good ductility and can be heated and stretched into particles of various shapes and sizes. The protective plug and the rubber tube plug are both set to a bucket shape, and one end of the bucket shape is squeezed and sealed to prevent the energized metal particles in the butt tube from falling out of the butt tube when it is not docked, and the protective plug and the rubber tube plug are fit and squeezed. When the energized metal particles are squeezed and dispersed, the protective plug and the rubber tube plug expand to squeeze the energized metal particles tightly again.

[0014] Furthermore, an injection barrel is fixedly installed on the upper end of the docking tube, and a fixing bolt is threadedly installed on the inner wall of the injection barrel. A fixing spring is fixedly installed inside the fixing bolt, and an extrusion bolt is fixedly installed on the end of the fixing spring away from the fixing bolt. Specifically, when the docking is completed, alumina ceramic particles are injected into the docking tube and the wiring tube through the injection barrel, and the alumina ceramic particles are squeezed and compacted using the fixing bolt, so that the injected alumina ceramic particles can not only extrude and fix the docking tube, but also improve the heat resistance of the fire-resistant cable joint, and also play a role of insulation and heat insulation. At the same time, the extrusion bolt moves to the fixing bolt to extrude the fixing spring. When the particles in the docking tube and the wiring tube are loose, the fixing spring pushes the extrusion bolt to compress the particles again.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention sets the refractory ring and the heat-insulating ring as a metal heat-insulating material in the shape of a winding spring. When the fire-resistant cable is bent, one end of the winding spring-shaped refractory ring and the heat-insulating ring are close to each other, and the other end is open, thereby improving the bending flexibility of the cable;

[0017] 2. In the present invention, alumina ceramic particles are stored in the gap between the refractory ring and the heat-insulating ring, so that after the cable is bent, the alumina ceramic particles flow in the gap to the opening, so that each position of the refractory cable has good fire resistance, and it is avoided that after the refractory cable is bent, the refractory material at the bending part of the refractory cable is stretched, resulting in a decrease in the fire resistance of the refractory cable at the bending part, thereby improving the fire resistance and heat insulation of the cable;

[0018] 3. When the joint position of the fire-resistant cable needs to be installed, the threaded ring provided on the wiring barrel is threadedly connected to the threaded barrel, and the threaded ring and the threaded barrel are relatively rotated, so that the installation and connection of the fire-resistant cable is more convenient;

[0019] 4. In the present invention, the protective plug and the rubber plug are both configured to be bucket-shaped, and one end of the bucket is squeezed and sealed to prevent the energized metal particles in the docking tube from falling out of the docking tube when not docked, and the protective plug and the rubber plug 310 are fit and squeezed. When the energized metal particles are squeezed and dispersed, the protective plug and the rubber plug expand and squeeze the energized metal particles tightly again. The internal rubber plug and protective plug can keep the internal particles compacted tightly, thereby having good conductivity. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 It is a schematic diagram of the structure of the wiring barrel in the present invention;

[0022] Figure 3 It is a structural schematic diagram of the cable tube in the present invention;

[0023] Figure 4 It is a structural schematic diagram of the refractory ring in the present invention;

[0024] Figure 5 It is a structural schematic diagram of the installation ring in the present invention;

[0025] Figure 6 It is a structural schematic diagram of the fixing bolt in the present invention;

[0026] Figure 7 It is a structural schematic diagram of the fixing ring in the present invention;

[0027] Figure 8 It is a structural schematic diagram of the docking sleeve in the present invention.

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

[0029] 2. Refractory layer; 201. Refractory ring; 202. Insulating tube; 203. Rubber glue; 204. Insulating ring;

[0030] 3. Connector mechanism; 301. Wiring barrel; 302. Butt-jointing barrel; 303. Threaded ring; 304. Threaded barrel; 305. Powerful spring;

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

[0032] 311, material retaining ring; 312, pushing ring; 313, extrusion tube; 314, protective plug;

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

[0034] 4. Fixing mechanism; 401. Fixed ring; 402. Moving ring; 403. Retaining ring. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 8A fire-resistant cable that is easy to wire includes a cable tube 1. The interior of the cable tube 1 is provided with a fire-resistant layer 2 that can be bent repeatedly without affecting use. The interior of the fire-resistant layer 2 is wrapped with a plurality of conducting wires 101. Specifically, the conducting wires 101 are wrapped in the center of the fire-resistant layer 2, so that the conducting wires 101 are always kept in the center position of the cable tube 1. The fire-resistant layer 2 makes the fire-resistant cable easy to bend. One end of the cable tube 1 is provided with a joint mechanism 3 that is convenient for cable installation and docking. Specifically, the two joint mechanisms 3 are connected by threads, so that the connection and replacement of the fire-resistant cable is more convenient.

[0037] See also Figure 1 to Figure 4 The fire-resistant layer 2 includes a fire-resistant ring 201, and the fire-resistant ring 201 slides and fits on the inner wall of the cable tube 1. The outer wall of the live wire 101 is wrapped with an insulating tube 202. The outer wall of the insulating tube 202 is set to a smooth arc surface, so that the fire-resistant ring 201 can slide more conveniently on the outer surface of the insulating tube 202 when it is bent. An insulating rubber glue 203 is filled between the live wire 101 and the insulating tube 202, and the rubber glue 203 has good insulation and temperature resistance, and the rubber also has shock absorption and wear resistance. The shock absorption can absorb and dissipate vibration energy, and play a role in shock absorption and buffering. Wear resistance: It has good wear resistance and can withstand long-term friction and wear while maintaining good performance, so that the fire-resistant cable can still maintain a good state when it is repeatedly bent. The insulating tube 202 and the rubber glue 203 wrap the live wire 101 in the cable tube 1 to ensure the insulation of the cable.

[0038] See also Figure 1 to Figure 4 The inner wall of the refractory ring 201 is slidably provided with a heat insulating ring 204. The refractory ring 201 and the heat insulating ring 204 are both made of metal heat insulating materials, and the refractory ring 201 and the heat insulating ring 204 are both arranged in a winding spring shape, thereby improving the bending flexibility of the cable, and the winding directions of the refractory ring 201 and the heat insulating ring 204 are opposite to each other, so as to avoid the two winding spring-shaped pipes from getting stuck when bending in the same direction. Alumina ceramic particles are filled between the heat insulating ring 204 and the refractory ring 201 and the cable tube 1, which are not shown in the figure. The alumina ceramic particles have a high melting point. It can reach 2050℃, has good mechanical and insulating properties, and can maintain high strength and hardness even at high temperatures, which can ensure the stability of signal transmission. Its main raw material, alumina, is abundant in nature, relatively cheap, and the production process is relatively mature, which makes alumina ceramics have certain cost advantages in large-scale production and application. Alumina ceramic particles are used to fill the gap between the refractory ring 201 and the thermal insulation ring 204, so that when the cable is bent, the alumina ceramic particles in the cable flow, so that the cable maintains good fire resistance.

[0039] See also Figures 1 to 8The connector mechanism 3 includes a wiring barrel 301 and a docking barrel 302, and the docking barrel 302 is installed at one end of the cable tube 1 that needs to be docked with the wiring barrel 301, and the material used for the wiring barrel 301 and the docking barrel 302 is silicon carbide ceramic, which has excellent high temperature resistance and can be used for a long time in a high temperature environment above 1400°C. At the same time, it has high hardness and wear resistance, good chemical stability, and can resist the corrosion of most acids and alkalis, so that the joint of the fire-resistant cable can be placed outside for a long time, thereby increasing the service life of the cable connector. A threaded ring 303 is fixedly installed on one end of the docking barrel 302 close to the wiring barrel 301, and a threaded barrel 304 is slidably provided on the inner wall of the wiring barrel 301 close to the threaded ring 303, and the threaded ring 303 is matched with the thread set on the threaded barrel 304, and a convex portion is provided on the outer wall of the threaded barrel 304, and the wiring barrel 301 is close to the thread The protruding position of the barrel 304 is provided with a depression that fits with the protrusion, so that the threaded barrel 304 will not rotate during the sliding process, and a strong spring 305 is rotatably installed between the threaded barrel 304 and the wiring barrel 301. The above-mentioned strong spring 305 is a rectangular spring with a high elastic coefficient in the prior art. The service life of the rectangular spring can be increased by 13%-14% compared with the round-section spring. The strong spring 305 arranged between the threaded barrel 304 and the wiring barrel 301 prevents the connection from loosening and causing damage after the docking is completed, and at the same time prevents the thread from being stripped. When the joint position of the docking fire-resistant cable needs to be installed, the threaded ring 303 set on the wiring barrel 301 is threadedly docked into the threaded barrel 304, and the wiring barrel 301 and the docking barrel 302 are relatively rotated to make the threaded ring 303 threadably connected to the threaded barrel 304, so that the installation and docking of the fire-resistant cable is more convenient.

[0040] See also Figure 7 , Figure 8The inner walls of the wiring barrel 301 and the docking barrel 302 are both rotatably provided with a fixing mechanism 4, the fixing mechanism 4 includes a fixing ring 401, and the fixing ring 401 is respectively threadedly installed on the inner walls of the wiring barrel 301 and the docking barrel 302, and the fixing ring 401 is rotatably provided with a moving ring 402 at one end of the fixing ring 401 close to the wiring barrel 301, and a groove is opened at one end of the moving ring 402, and the moving ring 402 is set as an elastic material, so that the end of the moving ring 402 provided with the groove can be bent, and the inner walls of the wiring barrel 301 and the docking barrel 302 are both rotatably provided with a retaining ring 403. Specifically, the wiring barrel 301 and the docking barrel 302 are placed on the outer wall of the cable barrel, and the fixing mechanism 4 is rotated. The fixed circle 401 causes the moving circle 402 to start moving. After the moving circle 402 moves to one side of the retaining ring 403, the retaining ring 403 pushes the moving circle 402 to bend, so that the moving circle 402 bends and squeezes the cable tube 1, thereby fixing the wiring barrel 301 and the docking barrel 302 on the outer wall of the cable tube 1. The end of the cable tube 1 squeezed by the moving circle 402 is squeezed into a barb shape. When the cable tube 1 moves, the end of the cable tube 1 squeezed by the moving circle 402 continues to bend and squeeze the cable tube 1. The greater the force and distance of the movement of the cable tube 1, the greater the force of the moving circle 402 squeezing the cable tube 1, thereby playing a good fixing role and preventing the wiring barrel 301 and the docking barrel 302 from falling off.

[0041] See also Figure 2 , Figure 5 A sealing ring 306 is fixedly installed on the inner wall of the wiring barrel 301. The sealing ring 306 prevents air from entering the cable tube 1 through the connection and causing the material in the cable tube 1 to weather and rust. A mounting ring 307 is fixedly installed on the end of the sealing ring 306 away from the wiring barrel 301. The mounting ring 307 is blocked at the joint of the cable tube 1. After cutting the fire-resistant cable and adding the required alumina ceramic particles to the cable tube 1, the mounting ring 307 squeezes and seals the alumina ceramic particles in the cable tube 1 to prevent the alumina ceramic particles in the cable tube 1 from falling off after connection, resulting in reduced fire resistance of the cable. A plurality of butt joints 308 are fixedly installed on the inner wall of the mounting ring 307. The diameter of the tube 308 matches that of the electric wire 101. The electric wire 101 is inserted into the butt joint tube 308, and a dent is made on the other end of the butt joint tube 308 using a clamp, so that the butt joint tube 308 is fixed to one end of the electric wire 101. A sliding ring 309 is slidably installed on the inner wall of the open end of the butt joint tube 308, and a rubber tube plug 310 is fixedly installed on the inner wall of the sliding ring 309. A protruding diameter ring is provided on the inner wall of the end of the butt joint tube 308 away from the mounting ring 307, so that the sliding ring 309 can only slide in the butt joint tube 308, thereby preventing the sliding ring 309 from falling out of the butt joint tube 308, thereby making the provided protruding diameter ring play a limiting role.

[0042] See also Figure 1 , Figure 8A retaining ring 311 is fixedly installed on one end of the butt joint 302 close to the wiring barrel 301, and a pushing ring 312 is fixedly installed on one end of the retaining ring 311 close to the wiring barrel 301. A plurality of extrusion tubes 313 are arranged on the inner wall of the pushing ring 312. The diameter of one end of the extrusion tube 313 close to the butt joint 308 matches the inner wall diameter of the butt joint 308. Both the butt joint 308 and the extrusion tube 313 are provided with electrified metal particles, and the above electrified metal particles are silver particles in the prior art. The electrical conductivity of silver is the highest among common metals, reaching 6.3×10 7 S / m. This means that it can conduct current more efficiently. Under the same voltage, silver metal particles can pass a larger current, thereby better meeting the needs of power supply. In addition, the chemical properties of silver are relatively stable and it is not easy to react chemically with other substances. It can maintain good performance during the power supply process, reducing the risk of increased resistance or decreased performance due to factors such as oxidation and corrosion, thereby ensuring the stability and reliability of power supply. At the same time, if the temperature at the joint rises and the silver melts and connects, silver also has good ductility and can be heated and stretched into particles of various shapes and sizes, which is convenient for use in different application scenarios. Whether it is making small conductive connection points or larger conductive parts, silver can meet the requirements through appropriate processing technology. Specifically, when the extruded tube 313 is inserted into the butt-joint tube 308, the extruded tube 313 pushes the sliding ring 309 in the butt-joint tube 308 to move, and keeps the extruded tube 313 in a sealed state after being inserted into the butt-joint tube 308, so as to prevent the extruded tube 313 from falling off from the energized metal particles in the butt-joint tube 308. The extrusion tube 313 squeezes the electrified metal particles in the butt tube 308. When the butt tube 302 is butt-jointed with the wiring tube 301, the butt tube 308 is aligned with the extrusion tube 313, and the extrusion tube 313 is inserted into the butt tube 308. The extrusion tube 313 pushes the sliding ring 309 in the butt tube 308 to move, so that the electrified metal particles in the butt tube 308 are squeezed and pushed into the extrusion tube 313, thereby making the butt joint installation more convenient. A protective plug 314 is fixedly installed on the inner wall of the extrusion tube 313 to protect Both the plug 314 and the rubber plug 310 are configured to be bucket-shaped, and one end of the bucket is squeezed and fitted to seal, so as to prevent the energized metal particles in the docking tube 308 from falling out of the docking tube 308 when not docked, and the protective plug 314 and the rubber plug 310 are fit and squeezed together. When the energized metal particles are squeezed and dispersed, the high elasticity of rubber can produce a larger deformation under the action of a smaller external force, and can quickly return to its original shape when the external force is removed, so that the protective plug 314 and the rubber plug 310 expand and squeeze the energized metal particles tightly again.

[0043] See also Figure 2 to Figure 6, an injection screw 315 is fixedly installed on the upper end of the docking tube 302, and the injection screw 315 is connected to the docking tube 302, and a fixing bolt 316 is installed on the inner wall thread of the injection screw 315. When the docking is completed, alumina ceramic particles are injected into the docking tube 302 and the wiring tube 301 through the injection screw 315, and the alumina ceramic particles are squeezed and compacted using the fixing bolt 316, so that the injected alumina ceramic particles can not only squeeze and fix the docking tube 308, but also improve the heat resistance of the fire-resistant cable joint, and also play a role in insulation and heat insulation. A fixing spring 317 is fixedly installed inside the fixing bolt 316, and an extrusion bolt 318 is fixedly installed on the end of the fixing spring 317 away from the fixing bolt 316. When the fixing bolt 316 is installed, the extrusion bolt 318 moves to the fixing bolt 316 to squeeze the fixing spring 317. When the particles in the docking tube 302 and the wiring tube 301 are loose, the fixing spring 317 pushes the extrusion bolt 318 to compress the particles again.

[0044] The working principle of the present invention is: when the cable is bent, the wound thread-shaped fire-resistant ring 201 and the heat-insulating ring 204 have better flexibility than the metal heat-insulating material in the existing fire-resistant cable. When the fire-resistant cable is bent, the spring-shaped bending position of the fire-resistant ring 201 and the heat-insulating ring 204 opens on one side and closes on the other side, thereby reducing the force required by the staff to bend the fire-resistant cable. The fire-resistant cable can still maintain a good state when it is repeatedly bent, so that the fire-resistant cable can be frequently moved or bent;

[0045] Alumina ceramic particles are stored in the gap between the refractory ring 201 and the heat insulating ring 204, so that after the cable is bent, the alumina ceramic particles flow in the gap to the opening, so that each position of the refractory cable has good fire resistance, and the refractory material at the bending of the refractory cable is not stretched after the refractory cable is bent, resulting in a decrease in the fire resistance of the bending of the refractory cable, thereby improving the fire resistance and heat insulation of the cable;

[0046] At the same time, when installing the butt-jointed fire-resistant cable, the fixing mechanism 4 is fixed at the joint of the cable, the extrusion tube 313 is inserted into the butt-jointed tube 308, the butt-jointed tube 302 and the wiring tube 301 are rotated, so that the energized metal particles in the butt-jointed tube 308 are squeezed and pushed into the extrusion tube 313, and the energized metal particles in the butt-jointed tube 308 and the extrusion tube 313 are mixed and squeezed firmly, so that the installation of the butt-jointed fire-resistant cable is more convenient;

[0047] After the extrusion tube 313 is inserted into the docking tube 308, the protective plug 314 and the rubber plug 310 are fitted and squeezed. The rubber plug 310 and the protective plug 314 are both made of rubber material. When the energized metal particles are squeezed and dispersed, the high elasticity of rubber can produce a larger deformation under the action of a smaller external force. When the external force is removed, it can quickly return to its original state, so that the protective plug 314 and the rubber plug 310 expand and squeeze the energized metal particles again, thereby avoiding poor contact at the connection of the fire-resistant cable.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed in the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fire-resistant cable that is easy to connect, comprising a cable tube, characterized in that: The cable tube is provided with a fire-resistant layer inside which can be bent repeatedly without affecting use. A plurality of conducting wires are wrapped inside the fire-resistant layer and wound inside the cable tube. A joint mechanism is provided at one end of the cable tube for convenient cable installation and docking.

2. A fire-resistant cable that is easy to connect according to claim 1, characterized in that: The fire-resistant layer comprises a fire-resistant ring, and the fire-resistant ring is slidably attached to the inner wall of the cable tube, the outer wall of the live wire is wrapped with an insulating cylinder, and insulating rubber glue is filled between the live wire and the insulating cylinder.

3. A fire-resistant cable that is easy to connect according to claim 2, characterized in that: The inner wall of the refractory ring is slidably provided with a heat insulating ring, and alumina ceramic particles are filled between the heat insulating ring, the refractory ring and the cable tube.

4. A fire-resistant cable that is easy to connect according to claim 1, characterized in that: The joint mechanism includes a wiring barrel and a docking barrel, and the docking barrel is installed at one end of the cable tube that needs to be docked with the wiring barrel. A threaded ring is fixedly installed at one end of the docking barrel close to the wiring barrel, and a threaded barrel is slidably provided on the inner wall of the wiring barrel close to the threaded ring.

5. A fire-resistant cable that is easy to connect according to claim 4, characterized in that: The inner walls of the wiring barrel and the docking barrel are both rotatably provided with a fixing mechanism, the fixing mechanism includes a fixing ring, and the fixing ring is threadedly installed on the inner walls of the wiring barrel and the docking barrel respectively, a moving ring is rotatably provided at one end of the fixing ring close to the wiring barrel, and the inner walls of the wiring barrel and the docking barrel are both rotatably provided with a retaining ring.

6. A fire-resistant cable that is easy to connect according to claim 4, characterized in that: A sealing ring is fixedly installed on the inner wall of the wiring barrel, a mounting ring is fixedly installed on the end of the sealing ring away from the wiring barrel, a plurality of docking tubes are fixedly installed on the inner wall of the mounting ring, sliding rings are slidably installed on the inner walls of the opening ends of the docking tubes, and a rubber tube plug is fixedly installed on the inner wall of the sliding ring.

7. A fire-resistant cable that is easy to connect according to claim 6, characterized in that: A material retaining ring is fixedly installed on one end of the docking sleeve close to the wiring sleeve, and a pushing ring is fixedly installed on one end of the material retaining ring close to the wiring sleeve.

8. A fire-resistant cable that is easy to connect according to claim 7, characterized in that: A plurality of extrusion tubes are arranged on the inner wall of the pushing circle, and electrified metal particles are placed inside the butt-joint tubes and the extrusion tubes, and a protective plug is fixedly installed on the inner wall of the extrusion tube.

9. A fire-resistant cable that is easy to connect according to claim 8, characterized in that: An injection screw barrel is fixedly installed on the upper end of the docking barrel, and a fixing bolt is threadedly installed on the inner wall of the injection screw barrel.

10. A fire-resistant cable that is easy to connect according to claim 9, characterized in that: A fixing spring is fixedly installed inside the fixing bolt, and a pressing bolt is fixedly installed on one end of the fixing spring away from the fixing bolt.

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