A flexible fire resistant cable having high flame retardancy

Abstract

The present application relates to a kind of high flame-retardant flexible fire-resistant cable applied to cable technical field, including two flexible resistance cable body and be used for connecting two flexible resistance cable body's broken vine connecting portion, flexible resistance cable body is by conductor, insulating layer, fire resistance layer, flame-retardant sheath layer is formed, broken vine connecting portion includes insulating support seat, the middle part of insulating support seat is embedded with electrically conductive stick body, the both ends of electrically conductive stick body are movably equipped with the electrically conductive slip pipe matched with it, by the setting of broken vine connecting portion, when cable is on fire, before the spread of fire reaches broken vine connecting portion, broken vine connecting portion will automatically adjust, cause the connection between two flexible resistance cable body to be disconnected, and make two flexible resistance cable body form interval, so that cable is no longer continuous, in turn effectively block the spread of fire, prevent the continuous spread of fire along cable, in turn can greatly improve the flame-retardant performance and safety of cable.

Description

Technical Field

[0001] This invention relates to a flexible fire-resistant cable, and more particularly to a highly flame-retardant flexible fire-resistant cable applied in the field of cable technology. Background Technology

[0002] Cables play a vital role in today's power transmission and communication fields. With the continuous development of various buildings and industrial facilities, the performance requirements for cables are also increasing. Among these, flame retardancy and fire resistance are key performance indicators for the safe operation of cables in special environments.

[0003] Currently, many cables with certain flame-retardant and fire-resistant properties exist on the market. These cables mainly achieve their flame-retardant and fire-resistant properties through material selection. For example, some cables improve their fire resistance by adding a fire-resistant layer, while others use flame-retardant materials to make the cable sheath layer to enhance their flame-retardant performance.

[0004] Chinese invention patent CN101533685B discloses a flame-retardant and fire-resistant cable, comprising one or more insulated cores. The structure of each insulated core consists of a conductor at its center and a conductor insulation layer surrounding each conductor. The outermost layer of the cable is a cable sheath. An oxygen barrier layer is provided within the inner layer of the cable sheath, enclosing all the insulated cores. Using this technical solution, the flame-retardant and fire-resistant cable can transmit electrical energy under normal operating conditions and maintain safe operation for a certain period under combustion conditions. The oxygen barrier layer is heat-resistant and decomposes to produce an oxygen-barrier outer shell, thus providing flame retardancy. Furthermore, this oxygen barrier layer is low-smoke and halogen-free, producing very little smoke during combustion and releasing halogen-free and non-toxic gases. In the event of a fire, it can significantly reduce harm to people, instruments, and equipment.

[0005] In the aforementioned invention patent, the cable sheath uses a low-smoke halogen-free flame-retardant sheath, which can improve the flame-retardant performance of the cable. However, the cable can still burn, and when it catches fire, the fire will continue to spread along the cable, failing to effectively stop the spread of the fire. Therefore, we propose a highly flame-retardant flexible fire-resistant cable. Summary of the Invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is: how to prevent the fire from spreading continuously along the cable when the cable catches fire.

[0007] To address the aforementioned problems, this invention provides a highly flame-retardant flexible fire-resistant cable, comprising two flexible fire-resistant cable bodies and a broken-vine connection portion for connecting the two flexible fire-resistant cable bodies. Each flexible fire-resistant cable body consists of a conductor, an insulation layer, a fire-resistant layer, and a flame-retardant sheath layer. One end of the conductor is exposed. The broken-vine connection portion includes an insulating support base, with a conductive rod embedded through the center of the insulating support base. Both ends of the conductive rod are movably fitted with matching conductive slide tubes. Matching insulating slide tubes are fixedly fitted onto the outer wall of the conductive slide tubes. The broken-vine connection portion also... It includes two conductive sleeves, which are respectively fitted onto the exposed ends of two conductors and are fixedly connected to the corresponding conductors. An insulating protective tube matching the conductive slide tube is fixedly fitted on the outer wall of the conductive sleeve. A conductive block matching the conductive slide tube is fixedly connected to the end of the conductive sleeve away from the conductor. The conductive block is located inside the conductive slide tube and is movably and sealed to the conductive slide tube. A connecting rod is fixedly installed inside the conductive slide tube. A deslip elastic rope is fixedly connected between the conductive block and the connecting rod. The deslip elastic rope is in a stretched state.

[0008] An L-shaped support frame is fixedly connected to one side of the insulating slide tube. A sealing cylinder is fixedly installed on the support frame. An unlocking spring is fixedly installed inside the sealing cylinder. One end of the unlocking spring is fixedly connected to a piston plate that is movably and sealingly connected to the sealing cylinder. A locking pin is fixedly connected to the end of the piston plate away from the unlocking spring. A pair of locking grooves matching the locking pin are opened on the insulating support. The locking pin penetrates the outer wall of the sealing cylinder and extends into the locking groove. The locking pin is movably inserted into the locking groove and slidably connected to the outer wall of the sealing cylinder. A flame detection hose is connected to the side wall of the sealing cylinder. The end of the flame detection hose away from the sealing cylinder is set as a seal and extends forward along the outer wall of the flame-retardant sheath. The flame detection hose is fixedly connected to the flame-retardant sheath, and the end of the flame detection hose away from the sealing cylinder is flush with the end of the flame-retardant sheath away from the insulating support. The end of the flame detection hose connected to the sealing cylinder is located on the side of the piston plate away from the locking pin. The unlocking spring is in a stretched state. The air pressure on the side of the piston plate away from the locking pin is greater than the air pressure on the side of the piston plate closer to the locking pin.

[0009] In the aforementioned highly flame-retardant flexible fire-resistant cable, when the cable catches fire, the broken-vein connection will automatically adjust before the fire spreads to the broken-vein connection, causing the connection between the two flexible fire-resistant cable bodies to break, thus making the cable no longer continuous, thereby effectively blocking the spread of the fire and preventing the fire from continuing to spread along the cable.

[0010] As a further improvement of this application, the insulation layer covers the outside of the conductor, the fire-resistant layer covers the outside of the insulation layer, and the flame-retardant sheath layer covers the outside of the fire-resistant layer. The fire-resistant layer is made of fire-resistant material, which can improve the fire resistance of the cable. The flame-retardant sheath layer is made of flame-retardant material, which can improve the flame-retardant performance of the cable. The conductive rod, conductive slide tube, conductive sleeve, and conductive block are all made of conductive material. The insulating support, insulating slide tube, and insulating protective tube are all made of insulating material to prevent leakage and ensure the safety of the cable.

[0011] As a further improvement of this application, the end of the insulating tube away from the conductor is set as a sealed end, and the end of the conductive slide tube away from the conductive rod is sleeved on the outer wall of the insulating tube, and the conductive slide tube and the insulating tube are movably and sealedly connected.

[0012] As a further improvement of this application, an insulating protective ring is fixedly connected to the end of the conductive slide tube away from the conductive rod. The insulating protective ring is made of insulating material and its outer diameter is the same as that of the insulating slide tube. The insulating protective ring is sleeved on the outer wall of the insulating tube and is movably and sealingly connected to it. The insulating protective ring can provide insulation protection for the end of the conductive slide tube, further preventing leakage.

[0013] As a further improvement of this application, both ends of the insulating support are fixedly connected with insulating protective sleeves that match the insulating slide tube. The insulating protective sleeves are made of insulating material and are fitted onto the outer wall of the insulating slide tube and movably sealed to it. The insulating protective sleeves can enhance the sealing of the connection between the conductive slide tube and the conductive rod, further prevent leakage, and further improve the safety of the cable. The outer diameter of the insulating slide tube is not greater than the diameter of the flexible withstand cable, which is conducive to the sliding of the conductive slide tube and the insulating slide tube.

[0014] As another improvement of this application, the end of the insulating tube away from the conductive slide tube is fixedly connected to a connecting sleeve that matches the flame-retardant sheath layer. The connecting sleeve is fitted on the outer wall of the insulating tube, and the end of the connecting sleeve away from the insulating tube is set as an open shape. The end of the sealing cylinder away from the locking pin is connected to an air inflator. The air inflator passes through the support frame, and the air inflator is equipped with a sealing cylinder, so that the flexible resistance cable can be independently rolled up when the cable is not in use.

[0015] As a further improvement to this application, the method of connecting two flexible resistance cables through the broken vine connector is as follows:

[0016] S1. At the end of the flexible resistance cable, peel off part of the insulation layer, fire-resistant layer and flame-retardant sheath layer, so that one end of the conductor is exposed. Place the broken vine connection part between the two flexible resistance cables and make the exposed end of the conductor face the broken vine connection part.

[0017] S2. Place the conductive sleeve onto the exposed end of the conductor, and place the connecting sleeve onto the outer wall of the flame-retardant sheath. Secure the connecting sleeve and the flame-retardant sheath with insulating tape to fix the conductive sleeve to the conductor.

[0018] S3. Pull the insulating slide tube to stretch the sliding elastic rope until the locking pin is aligned with the slot. Inflate the sealed cylinder with an appropriate amount of air through the air inlet tube, which will stretch the release spring and cause the piston plate to push the locking pin towards the slot until the locking pin is inserted into the slot.

[0019] S4. Lay the flame detection hose onto the outer wall of the flame-retardant sheath layer and fix the flame detection hose to the flame-retardant sheath layer. Then, the two flexible resistance cables can be connected through the broken vine connection part.

[0020] In summary, this application, through the design of the broken-vein connector, ensures that when the cable catches fire, the connector automatically adjusts before the fire spreads to it, causing the connection between the two flexible withstand cables to break and creating a gap between them. This prevents the cable from being continuous, effectively blocking the spread of fire and preventing it from continuing to spread along the cable, thus greatly improving the cable's flame-retardant performance and safety. Furthermore, the combined design of the connecting sleeve, inflation tube, and inflation check valve allows the flexible withstand cables to be independently wound up when the cable is not in use, and the broken-vein connector to be disassembled and stored. When laying or using the cable, the two flexible withstand cables can be connected again through the broken-vein connector. The connection operation is simple and convenient, greatly reducing the impact of the broken-vein connector on cable winding, storage, and transportation, thereby improving the cable's flexibility and practicality. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the first embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the structure of the flexible resistance cable in the first embodiment of this application;

[0023] Figure 3 This is a front view structural diagram of the broken vine connection portion in the first embodiment of this application;

[0024] Figure 4 For this application Figure 3 Enlarged structural diagram at point A;

[0025] Figure 5 This is a cross-sectional view of the insulating sheath in the first embodiment of this application;

[0026] Figure 6This is a cross-sectional view of the insulating support base in the first embodiment of this application;

[0027] Figure 7 This is a cross-sectional view of the sealing cylinder in the first embodiment of this application;

[0028] Figure 8 This is a pictographic illustration of the change in shape of the broken vine connection part when the flexible resistance cable catches fire in the first embodiment of this application.

[0029] Figure 9 This is a schematic diagram of the structure of the second embodiment of this application when the two flexible resistance cables are not connected together by the broken vine connection part;

[0030] Figure 10 for Figure 9 Enlarged structural diagram at point B;

[0031] Figure 11 This is a cross-sectional view of the connecting sleeve in the second embodiment of this application.

[0032] Explanation of the labels in the diagram:

[0033] 001. Flexible, durable cable body; 101. Conductor; 102. Insulation layer; 103. Fire-resistant layer; 104. Flame-retardant sheath layer; 002. Broken vine connection part; 201. Insulating support base; 202. Conductive rod body; 203. Conductive slide tube; 204. Insulating slide tube; 205. Insulating protective tube; 206. Conductive sleeve; 207. Conductive block; 208. Connecting rod; 209. Slip-resistant elastic rope; 210. Support frame; 211. Sealing cylinder; 212. Unlocking spring; 213. Piston plate; 214. Locking pin; 215. Locking groove; 216. Flame detection hose; 217. Insulating protective ring; 218. Insulating protective sleeve; 219. Connecting sleeve; 220. Inflation tube; 221. Inflation one-way valve. Detailed Implementation

[0034] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0035] First implementation method:

[0036] Figure 1-8This invention discloses a highly flame-retardant flexible fire-resistant cable, comprising two flexible fire-resistant cable bodies 001 and a broken-vine connection portion 002 for connecting the two flexible fire-resistant cable bodies 001. Each flexible fire-resistant cable body 001 consists of a conductor 101, an insulation layer 102, a fire-resistant layer 103, and a flame-retardant sheath layer 104. One end of the conductor 101 is exposed. The broken-vine connection portion 002 includes an insulating support base 201, with a conductive rod 202 embedded through the middle of the insulating support base 201. Both ends of the conductive rod 202 are movably fitted with matching conductive slide tubes 203. Matching insulating slide tubes 204 are fixedly fitted onto the outer wall of the conductive slide tubes 203. The broken-vine connection portion 002 also includes two conductive sleeves 20. 6. Two conductive sleeves 206 are respectively fitted onto the exposed ends of the two conductors 101, and the conductive sleeves 206 are fixedly connected to the corresponding conductors 101. An insulating protective tube 205 matching the conductive slide tube 203 is fixedly fitted on the outer wall of the conductive sleeve 206. A conductive block 207 matching the conductive slide tube 203 is fixedly connected to the end of the conductive sleeve 206 away from the conductor 101. The conductive block 207 is located inside the conductive slide tube 203 and is movably and sealingly connected to the conductive slide tube 203. A connecting rod 208 is fixedly installed inside the conductive slide tube 203. A deslip elastic rope 209 is fixedly connected between the conductive block 207 and the connecting rod 208. The deslip elastic rope 209 is in a stretched state.

[0037] Please see Figure 3-7 An L-shaped support frame 210 is fixedly connected to one side of the insulating slide tube 204. A sealing cylinder 211 is fixedly installed on the support frame 210. An unlocking spring 212 is fixedly installed inside the sealing cylinder 211. One end of the unlocking spring 212 is fixedly connected to a piston plate 213 that is movably and sealingly connected to the sealing cylinder 211. A locking pin 214 is fixedly connected to the end of the piston plate 213 away from the unlocking spring 212. A pair of locking grooves 215 matching the locking pins 214 are provided on the insulating support 201. The locking pins 214 penetrate the outer wall of the sealing cylinder 211 and extend into the locking grooves 215. The locking pins 214 and the locking grooves 215 are movably inserted into each other, and the locking pins 214 slide against the outer wall of the sealing cylinder 211. The sealing cylinder 211 is connected to a flame detection hose 216 on its side wall. The end of the flame detection hose 216 away from the sealing cylinder 211 is sealed and extends forward along the outer wall of the flame-retardant sheath layer 104. The flame detection hose 216 is fixedly connected to the flame-retardant sheath layer 104, and the end of the flame detection hose 216 away from the sealing cylinder 211 is flush with the end of the flame-retardant sheath layer 104 away from the insulating support 201. The end of the flame detection hose 216 connected to the sealing cylinder 211 is located on the side of the piston plate 213 away from the locking pin 214. The release spring 212 is in a stretched state, and the air pressure on the side of the piston plate 213 away from the locking pin 214 is greater than the air pressure on the side of the piston plate 213 close to the locking pin 214.

[0038] Please see Figure 1-8The conductors 101 in the two flexible resistance cables 001 can establish a conductive connection under the conductive action of the conductive sleeve 206, conductive block 207, conductive slide tube 203, and conductive rod 202. Since the end of the flame detection hose 216 away from the sealing cylinder 211 is sealed, and the air pressure on the side of the piston plate 213 away from the locking pin 214 is greater than the air pressure on the side of the piston plate 213 near the locking pin 214, the release spring 212 is kept in a stretched state. Since the locking pin 214 is locked in the slot 215, it can fix the conductive slide tube 203 and the insulating slide tube 204, so that the deslip elastic rope 209 is kept in a stretched state. When one of the flexible resistance cables 001 is engaged, the conductors 101 in the two flexible resistance cables 001 can establish a conductive connection under the conductive action of the conductive sleeve 206, conductive block 207, conductive slide tube 203, and conductive rod 202. When the flexible resistance cable 001 catches fire (for ease of description, let's assume the catching flexible resistance cable 001 is cable A and the other flexible resistance cable 001 is cable B), the flame detection hose 216 on cable A will be burned, causing air leakage in the corresponding sealed cylinder 211 (meaning air leakage from the side of piston plate 213 away from locking pin 214). This reduces the air pressure on the side of piston plate 213 away from locking pin 214, causing the corresponding release spring 212 to rebound. The rebound of the release spring 212 will move the locking pin 214 away from the insulating support 201, causing the locking pin 214 to disengage from the corresponding locking groove 215, thereby releasing the corresponding slip elastic rope. 209 rebounds, and the rebound of the deslip elastic rope 209 will cause the corresponding conductive slide tube 203 and insulating slide tube 204 to slide along the insulating protective tube 205 towards the direction of cable body A, thereby disconnecting the connection between the two flexible withstand cables 001 and disrupting the continuity of the cable, making the cable no longer continuous, thus blocking the spread of fire. In addition, the locking pin 214 corresponding to cable body A disengages from the locking groove 215, causing the corresponding deslip elastic rope 209 to rebound, and the deslip elastic rope 209 corresponding to cable body B will also rebound. Moreover, the rebound of the deslip elastic rope 209 will not only cause the corresponding conductive slide tube 203 and insulating slide tube 204 to slide towards the direction of cable body B. The sliding motion will also cause the insulating support 201 and the conductive rod 202 to slide together towards the cable body B, thereby further disrupting the continuity of the cable and further blocking the spread of fire. Therefore, by setting the broken vine connection part 002, when the cable catches fire, before the fire spreads to the broken vine connection part 002, the broken vine connection part 002 will automatically adjust, causing the connection between the two flexible resistance cables 001 to break and forming a gap between the two flexible resistance cables 001, so that the cable is no longer continuous, thereby effectively blocking the spread of fire and preventing the fire from continuing to spread along the cable, thus greatly improving the flame retardant performance and safety of the cable.

[0039] Please see Figure 2-6The insulation layer 102 covers the outside of the conductor 101, the fire-resistant layer 103 covers the outside of the insulation layer 102, and the flame-retardant sheath layer 104 covers the outside of the fire-resistant layer 103. The fire-resistant layer 103 is made of fire-resistant material, which can improve the fire resistance of the cable. The flame-retardant sheath layer 104 is made of flame-retardant material, which can improve the flame-retardant performance of the cable. The conductive rod 202, the conductive slide tube 203, the conductive sleeve 206, and the conductive block 207 are all made of conductive material. The insulating support 201, the insulating slide tube 204, and the insulating protective tube 205 are all made of insulating material to prevent leakage and ensure the safety of the cable.

[0040] Please see Figure 5-6 The end of the insulating tube 205 away from the conductor 101 is sealed. The end of the conductive slide tube 203 away from the conductive rod 202 is sleeved on the outer wall of the insulating tube 205, and the conductive slide tube 203 is movably and sealed to the insulating tube 205. The two ends of the insulating slide tube 204 are flush with the two ends of the conductive slide tube 203, and the two ends of the insulating tube 205 are flush with the two ends of the conductive sleeve 206. The exposed end of the conductor 101 is completely covered by the insulating tube 205 and the conductive sleeve 206 to prevent leakage.

[0041] Please see Figure 5 An insulating protective ring 217 is fixedly connected to one end of the conductive slide tube 203 away from the conductive rod 202. The insulating protective ring 217 is made of insulating material and its outer diameter is the same as that of the insulating slide tube 204. The insulating protective ring 217 is sleeved on the outer wall of the insulating protective tube 205 and is movably and sealingly connected to it. The insulating protective ring 217 can provide insulation protection for the end of the conductive slide tube 203 and further prevent leakage.

[0042] Please see Figure 6 Both ends of the insulating support 201 are fixedly connected with insulating protective sleeves 218 that match the insulating slide tube 204. The insulating protective sleeves 218 are made of insulating material. The insulating protective sleeves 218 are fitted on the outer wall of the insulating slide tube 204 and are movably and sealingly connected to it. The insulating protective sleeves 218 can enhance the sealing of the connection between the conductive slide tube 203 and the conductive rod 202, further prevent leakage, and further improve the safety of the cable. The outer diameter of the insulating slide tube 204 is not greater than the diameter of the flexible withstand cable 001, which is conducive to the sliding of the conductive slide tube 203 and the insulating slide tube 204.

[0043] Second implementation method:

[0044] Figure 9-11This invention discloses a highly flame-retardant flexible fire-resistant cable. Unlike the first embodiment, the end of the insulating tube 205 away from the conductive slide tube 203 is fixedly connected to a connecting sleeve 219 that matches the flame-retardant sheath layer 104. The connecting sleeve 219 is sleeved on the outer wall of the insulating tube 205, and the end of the connecting sleeve 219 away from the insulating tube 205 is set as an open shape. The end of the sealing cylinder 211 away from the locking pin 214 is connected to an air inlet pipe 220. The air inlet pipe 220 passes through the support frame 210, and the sealing cylinder 211 is provided on the air inlet pipe 220.

[0045] The method for connecting two flexible, resistance-resistant cable bodies 001 via the broken vine connector 002 is as follows:

[0046] S1. At the end of the flexible resistance cable 001, peel off part of the insulation layer 102, fire-resistant layer 103, and flame-retardant sheath layer 104, so that one end of the conductor 101 is exposed. Place the broken vine connection part 002 between the two flexible resistance cables 001, and make the exposed end of the conductor 101 face the broken vine connection part 002.

[0047] S2. The conductive sleeve 206 is fitted onto the exposed end of the conductor 101, and the connecting sleeve 219 is fitted onto the outer wall of the flame-retardant sheath layer 104. The connecting sleeve 219 and the flame-retardant sheath layer 104 are fixedly connected by insulating tape, so that the conductive sleeve 206 is fixedly connected to the conductor 101 (in this embodiment, the conductive sleeve 206 is indirectly fixedly connected to the conductor 101 through the connecting sleeve 219).

[0048] S3. Pull the insulating slide tube 204 to stretch the sliding elastic rope 209 until the locking pin 214 is aligned with the locking groove 215. Inflate the sealing cylinder 211 with an appropriate amount of air through the air inflator 220, which stretches the release spring 212 and causes the piston plate 213 to push the locking pin 214 toward the direction closer to the locking groove 215 until the locking pin 214 is inserted into the locking groove 215.

[0049] S4. Lay the flame detection hose 216 onto the outer wall of the flame-retardant sheath layer 104 (the end of the flame detection hose 216 away from the sealing cylinder 211 should be flush with the end of the flame-retardant sheath layer 104 away from the insulating support 201), and fix the flame detection hose 216 to the flame-retardant sheath layer 104. Then, the two flexible resistance cables 001 can be connected through the broken cable connection part 002.

[0050] When the cable is not in use, the flexible withstand cable body 001 and the broken vine connection part 002 are separate. The flexible withstand cable body 001 can be independently rolled up, and the broken vine connection part 002 can be disassembled. The conductive slide tube 203 and the conductive rod body 202 can be separated, and the insulating protective tube 205 can be inserted into the inside of the conductive slide tube 203 for storage. When laying and using the cable, the two flexible withstand cable bodies 001 are connected together through the broken vine connection part 002 in the same way as described above. Therefore, the connection sleeve... The combined arrangement of components such as 219, inflation tube 220, and inflation check valve 221 allows the flexible withstand cable body 001 to be independently wound up when the cable is not in use, and the broken vine connection part 002 to be disassembled and stored. When laying or using the cable, the two flexible withstand cable bodies 001 can be connected together through the broken vine connection part 002. The connection operation is simple and convenient, greatly reducing the impact of the broken vine connection part 002 on cable winding, storage, and transportation, thereby improving the flexibility and practicality of the cable.

[0051] In light of current practical needs, the above-described embodiments adopted in this application are not limited to this scope of protection. Various changes made within the knowledge of those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A highly flame-retardant flexible fire-resistant cable, comprising two flexible fire-resistant cable bodies (001) and a broken-vein connecting part (002) for connecting the two flexible fire-resistant cable bodies (001), wherein the flexible fire-resistant cable body (001) is composed of a conductor (101), an insulation layer (102), a fire-resistant layer (103), and a flame-retardant sheath layer (104), characterized in that, One end of the conductor (101) is exposed. The broken vine connection part (002) includes an insulating support base (201). A conductive rod (202) is embedded through the middle of the insulating support base (201). Both ends of the conductive rod (202) are movably fitted with matching conductive slide tubes (203). Matching insulating slide tubes (204) are fixedly fitted on the outer wall of the conductive slide tubes (203). The broken vine connection part (002) also includes two conductive sleeves (206). The two conductive sleeves (206) are respectively fitted onto the exposed ends of the two conductors (101), and the conductive sleeves (206) and the corresponding conductors (101) are connected. The conductive sleeve (206) is fixedly connected to the outer wall of the conductive sleeve (206) and an insulating protective tube (205) matching the conductive slide tube (203) is fixedly sleeved on the outer wall of the conductive sleeve (206). The conductive block (207) matching the conductive slide tube (203) is fixedly connected to the end of the conductive sleeve (206) away from the conductor (101). The conductive block (207) is located inside the conductive slide tube (203) and is movably and sealedly connected to the conductive slide tube (203). A connecting rod (208) is fixedly installed inside the conductive slide tube (203). A deslip elastic rope (209) is fixedly connected between the conductive block (207) and the connecting rod (208). The deslip elastic rope (209) is in a stretched state. An L-shaped support frame (210) is fixedly connected to one side of the insulating slide tube (204). A sealing cylinder (211) is fixedly installed on the support frame (210). A release spring (212) is fixedly installed inside the sealing cylinder (211). One end of the release spring (212) is fixedly connected to a piston plate (213) that is movably and sealingly connected to the sealing cylinder (211). A locking pin (214) is fixedly connected to the end of the piston plate (213) away from the release spring (212). A pair of locking grooves (215) matching the locking pins (214) are provided on the insulating support base (201). The locking pins (214) penetrate the outer wall of the sealing cylinder (211) and extend into the locking grooves (215). The locking pins (214) and the locking grooves (215) are movably inserted into each other, and the locking pins (214) and the sealing cylinder (211) are connected in a haptic manner. The outer wall is slidably connected, and a flame detection hose (216) is connected to the side wall of the sealing cylinder (211). The end of the flame detection hose (216) away from the sealing cylinder (211) is set as a seal and extends forward along the outer wall of the flame-retardant sheath layer (104). The flame detection hose (216) is fixedly connected to the flame-retardant sheath layer (104), and the end of the flame detection hose (216) away from the sealing cylinder (211) is flush with the end of the flame-retardant sheath layer (104) away from the insulating support base (201). The end of the flame detection hose (216) connected to the sealing cylinder (211) is located on the side of the piston plate (213) away from the locking pin (214). The release spring (212) is in a stretched state. The air pressure on the side of the piston plate (213) away from the locking pin (214) is greater than the air pressure on the side of the piston plate (213) close to the locking pin (214). The end of the insulating tube (205) away from the conductor (101) is sealed, and the end of the conductive slide tube (203) away from the conductive rod (202) is sleeved on the outer wall of the insulating tube (205), and the conductive slide tube (203) and the insulating tube (205) are movably and sealedly connected. The conductive slide tube (203) is fixedly connected to an insulating protective ring (217) at one end away from the conductive rod (202). The insulating protective ring (217) is made of insulating material and its outer diameter is the same as that of the insulating slide tube (204). The insulating protective ring (217) is sleeved on the outer wall of the insulating protective tube (205) and is movably and sealed to it.

2. A flexible fire resistant cable according to claim 1, characterised in that, The insulating layer (102) covers the outside of the conductor (101), the fire-resistant layer (103) covers the outside of the insulating layer (102), the flame-retardant sheath layer (104) covers the outside of the fire-resistant layer (103), the fire-resistant layer (103) is made of fire-resistant material, the flame-retardant sheath layer (104) is made of flame-retardant material, the conductive rod (202), the conductive slide tube (203), the conductive sleeve (206), and the conductive block (207) are all made of conductive material, and the insulating support base (201), the insulating slide tube (204), and the insulating protective tube (205) are all made of insulating material.

3. A flexible fire resistant cable according to claim 1, wherein, Both ends of the insulating support base (201) are fixedly connected to insulating protective sleeves (218) that match the insulating slide tube (204). The insulating protective sleeves (218) are made of insulating material. The insulating protective sleeves (218) are fitted on the outer wall of the insulating slide tube (204) and are movably and sealed to it. The outer diameter of the insulating slide tube (204) is not greater than the diameter of the flexible resistance cable body (001).

4. A flexible fire resistant cable according to claim 1, wherein, The end of the insulating tube (205) away from the conductive slide tube (203) is fixedly connected to a connecting sleeve (219) that matches the flame-retardant sheath layer (104). The connecting sleeve (219) is sleeved on the outer wall of the insulating tube (205), and the end of the connecting sleeve (219) away from the insulating tube (205) is set as an opening. The end of the sealing cylinder (211) away from the locking pin (214) is connected to an inflation pipe (220). The inflation pipe (220) passes through the support frame (210), and the sealing cylinder (211) is provided on the inflation pipe (220).

5. A flexible fire resistant cable according to claim 4, characterised in that, The method for connecting two flexible, resistance-resistant cables (001) via the broken vine connector (002) is as follows: S1. At the end of the flexible resistance cable (001), peel off part of the insulation layer (102), fire-resistant layer (103), and flame-retardant sheath layer (104) to expose one end of the conductor (101). Place the broken vine connection part (002) between the two flexible resistance cables (001) and make the exposed end of the conductor (101) face the broken vine connection part (002). S2. The conductive sleeve (206) is fitted onto the exposed end of the conductor (101), and the connecting sleeve (219) is fitted onto the outer wall of the flame-retardant sheath layer (104). The connecting sleeve (219) and the flame-retardant sheath layer (104) are fixedly connected by insulating tape so that the conductive sleeve (206) and the conductor (101) are fixedly connected. S3. Pull the insulating slide tube (204) to stretch the sliding elastic rope (209) until the locking pin (214) is aligned with the slot (215). Inflate the sealed cylinder (211) with an appropriate amount of air through the air inlet tube (220), causing the release spring (212) to be stretched and the piston plate (213) to push the locking pin (214) to move closer to the slot (215) until the locking pin (214) is inserted into the slot (215). S4, lay the fire detection hose (216) to the outer wall of the fire-retardant sheath layer (104), and fixedly connect the fire detection hose (216) and the fire-retardant sheath layer (104), that is, two flexible fire-resistant cables (001) can be connected through the vine breaking connection part (002).

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