Composite fireproof flame-retardant cable

Abstract

The invention relates to the technical field of cables, in particular to a composite fireproof and flame-retardant cable, and solves the problems that the fireproof and flame-retardant properties of the cable are relatively low, and external high temperature and low temperature can influence the cable. Comprising a cable core, the outer surface of the cable core is fixedly sleeved with a fireproof flame-retardant protection layer, and the outer surface of the fireproof flame-retardant protection layer is fixedly sleeved with a cable protection sleeve; a cable temperature adjusting mechanism is arranged below the cable protection sleeve and comprises a water delivery pump. Through the flame-retardant fire extinguishing mechanism, when the cable is ignited due to accidents, flame-retardant gel can be automatically extruded and covers the outer surface of the ignition position of the cable, and meanwhile, the cable temperature adjusting mechanism can be used for cooling or heating the cable according to the temperature of the external environment; according to the technical scheme, the fireproof and flame-retardant resistance of equipment is improved, and the influence of external high temperature or low temperature on the cable can be prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and specifically to a composite fireproof and flame-retardant cable. Background Art

[0002] A cable is a wire product used for transmitting electrical energy, signals, or realizing the conversion of electromagnetic energy. It has various types, including composite fireproof and flame-retardant cables. The composite fireproof and flame-retardant cable is a special cable that can maintain the integrity of the circuit for a certain period of time during a fire. This cable uses special flame-retardant materials and structural designs to enable it to maintain the continuity of the circuit in the flame and effectively prevent the spread of fire. The sheath and core materials of this type of cable have a high melting point, so they can still maintain structural stability in a high-temperature flame, and it has the characteristics of being difficult to burn and spread combustion.

[0003] However, this composite fireproof and flame-retardant cable can only resist the flame through the flame-retardant materials used to form its own protective layer. Its own fireproof and flame-retardant performance is low, and when the external temperature is too high, it will increase the possibility of spontaneous combustion of this cable. Moreover, too high a temperature is likely to cause the cable skin to soften, thereby accelerating its aging speed. When the external temperature is too low, it will increase the power loss of this cable, and too low a temperature may also affect the toughness of this cable, thereby increasing the risk of its fracture. The high and low temperature resistance of this cable is low. Therefore, it does not meet the existing requirements, and for this reason, we propose a composite fireproof and flame-retardant cable. Summary of the Invention

[0004] The purpose of the present invention is to provide a composite fireproof and flame-retardant cable to solve the problems mentioned in the above background art, that is, this composite fireproof and flame-retardant cable can only resist the flame through the flame-retardant materials used to form its own protective layer, its own fireproof and flame-retardant performance is low, when the external temperature is too high, it will increase the possibility of spontaneous combustion of this cable, too high a temperature is likely to cause the cable skin to soften, thereby accelerating its aging speed, when the external temperature is too low, it will increase the power loss of this cable, too low a temperature may also affect the toughness of this cable, thereby increasing the risk of its fracture, and the high and low temperature resistance of this cable is low.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A composite fireproof and flame-retardant cable, including a cable core, a fireproof and flame-retardant protective layer is fixedly sleeved on the outer surface of the cable core, and a cable protective sleeve is fixedly sleeved on the outer surface of the fireproof and flame-retardant protective layer. A cable temperature adjustment mechanism is provided below the cable protective sleeve. The cable temperature adjustment mechanism includes a water pump, a plurality of first water source delivery pipes, second water source delivery pipes with the same number as the first water source delivery pipes, and U-shaped metal water pipes. A plurality of the second water source delivery pipes are respectively located on the left side in front of a plurality of the first water source delivery pipes. An adjacent second water source delivery pipe and a first water source delivery pipe are connected by a U-shaped metal water pipe. The top end of the U-shaped metal water pipe is located outside the fireproof and flame-retardant protective layer, and the rear end surface of the last first water source delivery pipe is connected to the water pump; A filling protective sleeve fixedly sleeved on the outer surface of the fireproof and flame-retardant protective layer is provided between a plurality of U-shaped metal water pipes located inside the cable protective sleeve. A flame-retardant and fire-extinguishing mechanism is fixedly installed on the outer surface of the filling protective sleeve. The flame-retardant and fire-extinguishing mechanism includes a metal annular outer shell, a plurality of gel through holes, blocking heads with the same number as the gel through holes, a rubber sleeve, an annular storage groove, a flame-retardant gel, six arc-shaped pushing plates, and six pushing mechanisms. The plurality of gel through holes are arranged in a ring on the outer surface of the metal annular outer shell. The plurality of blocking heads are respectively plugged into the plurality of gel through holes. The rubber sleeve is sleeved on the outer surface of the metal annular outer shell, and the inner wall of the rubber sleeve is fixed to all the blocking heads; The annular storage groove is located inside the metal annular outer shell, and the flame-retardant gel is filled in the annular storage groove; The six arc-shaped pushing plates are respectively located at six end corners inside the flame-retardant gel. The surface of the arc-shaped pushing plate facing the inner wall of the metal annular outer shell is in contact with the inner wall of the metal annular outer shell, and the six pushing mechanisms can respectively push the six arc-shaped pushing plates outwards.

[0006] Preferably, a plurality of water outlet holes are provided on the upper end surfaces of all the U-shaped metal water pipes; A rubber arc-shaped cover plate is provided above the U-shaped metal water pipe. A plurality of water outlet blocking heads are fixedly provided on the lower end surface of the rubber arc-shaped cover plate. The positions, numbers, and shapes of the water outlet blocking heads correspond to the positions, numbers, and shapes of the water outlet holes.

[0007] Preferably, a U-shaped pipe fixing sleeve fixedly sleeved on the outer surface of the fireproof and flame-retardant protective layer is provided inside the top end of the U-shaped metal water pipe. A U-shaped pipe fixing groove is provided on the upper end surface of the U-shaped pipe fixing sleeve, and the top end of the U-shaped metal water pipe is clamped into the U-shaped pipe fixing groove.

[0008] Preferably, a square outer shell is fixedly sleeved on the outside of the bottom end of the U-shaped metal water pipe. The rear end of the first water source delivery pipe in front of the U-shaped metal water pipe is clamped into the square outer shell, and the front end of the second water source delivery pipe behind the U-shaped metal water pipe is clamped into the square outer shell.

[0009] Preferably, on both sides above the square housing, there is a fixed connection ring fixedly sleeved on the outer surface of the fireproof and flame-retardant protective layer. On both sides of the lower end surface of the fixed connection ring, there is a fixed connecting rod fixedly connected, and the lower end surface of the fixed connecting rod is fixed to the square housing.

[0010] Preferably, the pushing mechanism includes two cylindrical grooves. Inside the cylindrical grooves, there is a cylindrical head fixed to the inner wall of the metal annular housing. Inside the cylindrical head, there is a spring groove. Inside the spring groove, there is a spring. One end of the spring is connected to a pushing ring. The axis of the pushing ring is connected to a pushing rod, and the surface of the pushing rod facing the inner wall of the cylindrical groove is fixed to the inner wall of the cylindrical groove.

[0011] Preferably, between two adjacent arc-shaped pushing plates, there is a gap material pushing mechanism. The gap material pushing mechanism includes an arc-shaped sleeve and an arc-shaped plate. The arc-shaped sleeve and the arc-shaped plate are both arc-shaped as a whole. The arc-shaped plate is movably inserted into the arc-shaped sleeve, and the outer surface of the arc-shaped plate is slidably connected to the inner wall of the arc-shaped sleeve.

[0012] Preferably, the surfaces of the arc-shaped sleeve and the arc-shaped plate facing the two arc-shaped pushing plates are slidably connected to the two arc-shaped pushing plates respectively, and the surfaces of the arc-shaped sleeve and the arc-shaped plate facing the flame-retardant gel are in contact with the flame-retardant gel.

[0013] Preferably, the outer surface of the pushing ring is in contact with the inner wall of the spring groove, and the pushing ring is slidably connected to the spring groove.

[0014] Preferably, a circle of limit plugs is fixedly arranged on the inner wall of the metal annular housing. Outside the limit plugs, there are limit slots on the outer surface of the filling protection sleeve. The outer surface of the limit plugs is in contact with the inner wall of the limit slots.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In the present invention, a flame-retardant extinguishing mechanism is installed on the outer surfaces of a plurality of filling protection sleeves located between the cable core and the fireproof and flame-retardant protection layer. When the cable is accidentally ignited, as the fire spreads, the rubber sleeve sleeved on the outer surface of the metal ring-shaped housing and the blocking head fixed to the inner wall of the rubber sleeve will be burned through. After the blocking head is completely burned out, the gel through-hole blocked by the blocking head will be opened. Then, the flame-retardant gel inside the metal ring-shaped housing will be extruded from the gel through-hole by the arc-shaped pushing plate pushed outward. The flame-retardant gel extruded to the outside will cover the surface of the burning cable, thereby blocking oxygen and reducing the burning speed. Through the above technical solution, the fireproof and flame-retardant effect of the device is improved. And if the fire source is not large in the initial stage of the fire, covering the outer surface of the cable with the flame-retardant gel may directly extinguish the ignited cable. 2. In the present invention, a plurality of U-shaped metal water pipes connected between the first water source delivery pipe and the second water source delivery pipe are also provided between the cable core and the fireproof and flame-retardant protection layer. And the first water source delivery pipe at the rearmost is connected to the water pump. When the outside temperature is too high or too low, cold water or hot water can be poured into the first water source delivery pipe, the second water source delivery pipe and the inside of the U-shaped metal water pipes through the water pump, so as to ensure that the cable can maintain a normal temperature in a high-temperature or low-temperature environment and ensure its normal use. Through the above technical solution, the overall environmental adaptability of the cable is improved, and the cable can be prevented from being affected by the outside high temperature or low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the whole of the present invention; Figure 2 For the present invention Figure 1 is an enlarged structural view of part A in Figure 3 For the present invention Figure 1 is an internal structural diagram of part A in Figure 4 For the present invention Figure 2 is an internal structural diagram of the flame-retardant extinguishing mechanism at part B in Figure 5 For the present invention Figure 4 is an enlarged structural view of part C in Figure 6 For the present invention Figure 5 is an enlarged structural view of part D in Figure 7 For the present invention Figure 2 is a front view of the flame-retardant extinguishing mechanism at part B in

[0017] In the figure: 1. Cable core; 2. Flame-retardant and fire-extinguishing mechanism; 201. Metal ring-shaped outer shell; 202. Gel through-hole; 203. Blocking head; 204. Rubber sleeve; 205. Flame-retardant gel; 206. Arc-shaped push plate; 207. Cylindrical groove; 208. Cylindrical head; 209. Spring groove; 210. Spring; 211. Push ring; 212. Push rod; 213. Limit plug; 214. Ring-shaped storage groove; 215. Limit slot; 216. Gap material pushing mechanism; 217. Arc-shaped sleeve; 218. Arc-shaped plate; 3. Water pump; 4. First water source delivery pipe; 5. Second water source delivery pipe; 6. Square outer shell; 7. U-shaped metal water pipe; 8. U-shaped pipe fixing sleeve; 9. U-shaped pipe fixing groove; 10. Water outlet hole; 11. Water outlet blocking head; 12. Rubber arc-shaped cover plate; 13. Fixed connection ring; 14. Fixed connection rod; 15. Fireproof and flame-retardant protective layer; 16. Cable protective sleeve; 17. Filling protective sleeve. Detailed implementation manner

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0019] Please refer to Figures 1 to 7 , an embodiment provided by the present invention: A composite fireproof and flame-retardant cable includes a cable core 1. A fireproof and flame-retardant protective layer 15 is fixedly sleeved on the outer surface of the cable core 1, and a cable protective sleeve 16 is fixedly sleeved on the outer surface of the fireproof and flame-retardant protective layer 15; Below the cable protective sleeve 16 is provided with a cable temperature adjustment mechanism. The cable temperature adjustment mechanism includes a water pump 3, a plurality of first water source delivery pipes 4, second water source delivery pipes 5 with the same number as the first water source delivery pipes 4, and a U-shaped metal water pipe 7. The plurality of second water source delivery pipes 5 are respectively located on the left side in front of the plurality of first water source delivery pipes 4. An adjacent second water source delivery pipe 5 and a first water source delivery pipe 4 are connected by a U-shaped metal water pipe 7. The top end of the U-shaped metal water pipe 7 is located outside the fireproof and flame-retardant protective layer 15, and the rear end surface of the last first water source delivery pipe 4 is connected to the water pump 3; When the external temperature is too high or too low, cold water or hot water can be poured into the interiors of the first water source delivery pipe 4, the second water source delivery pipe 5, and the U-shaped metal water pipe 7 through the water pump 3. The cold water or hot water entering the interior of the U-shaped metal water pipe 7 will transfer its cold air or hot air to the cable core 1, the fireproof and flame-retardant protective layer 15, and the cable protective sleeve 16, so as to ensure that the cable can maintain a normal temperature in a high-temperature or low-temperature environment and ensure its normal use. Through the above technical solution, the overall environmental adaptability of the cable is improved, and the cable can be prevented from being affected by external high temperature or low temperature.

[0020] A plurality of water outlet holes 10 are provided on the upper end surfaces of all U-shaped metal water pipes 7; Above the U-shaped metal water pipe 7, there is a rubber arc-shaped cover plate 12. A plurality of water outlet blocking heads 11 are fixedly provided on the lower end surface of the rubber arc-shaped cover plate 12. The positions, quantities, and shapes of the water outlet blocking heads 11 correspond to the positions, quantities, and shapes of the water outlet holes 10; when this cable temperature adjustment mechanism is in normal use, the water outlet holes 10 located on the upper end surface of the U-shaped metal water pipe 7 can be blocked by the water outlet blocking heads 11 fixed on the lower end surface of the rubber arc-shaped cover plate 12, so as to prevent the water source inside the U-shaped metal water pipe 7 from flowing into the inside of the cable when cooling or heating the cable, thereby causing damage to the cable; If the cable is accidentally ignited, as the fire spreads, if the rubber arc-shaped cover plate 12 on the upper end surface of the U-shaped metal water pipe 7 and the water outlet blocking heads 11 fixed on the lower end surface of the rubber arc-shaped cover plate 12 are completely burned, the water outlet holes 10 will be opened. Then, the water source flowing inside the U-shaped metal water pipe 7 will be sprayed out through the opened water outlet holes 10. By the water source sprayed out from the water outlet holes 10, the cable can be directly extinguished. Through the above technical solution, when the cable is ignited, water can be automatically sprayed at the ignition position to extinguish the fire and prevent the fire from spreading.

[0021] Inside the inner side of the top end of the U-shaped metal water pipe 7, there is a U-shaped pipe fixing sleeve 8 fixedly sleeved on the outer surface of the fireproof and flame-retardant protective layer 15. A U-shaped pipe fixing groove 9 is provided on the upper end surface of the U-shaped pipe fixing sleeve 8, and the top end of the U-shaped metal water pipe 7 is clamped inside the U-shaped pipe fixing groove 9; the U-shaped metal water pipe 7 can be fixed at the current position by the U-shaped pipe fixing sleeve 8 fixedly sleeved on the outer surface of the fireproof and flame-retardant protective layer 15, preventing it from moving.

[0022] A square outer shell 6 is fixedly sleeved on the outer side of the bottom end of the U-shaped metal water pipe 7. The rear end of the first water source delivery pipe 4 in front of the U-shaped metal water pipe 7 is clamped inside the square outer shell 6, and the front end of the second water source delivery pipe 5 behind the U-shaped metal water pipe 7 is clamped inside the square outer shell 6; on both sides above the square outer shell 6, there is a fixed connection ring 13 fixedly sleeved on the outer surface of the fireproof and flame-retardant protective layer 15. On both sides of the lower end surface of the fixed connection ring 13, a fixed connecting rod 14 is fixedly connected, and the lower end surface of the fixed connecting rod 14 is fixed to the square outer shell 6; the first water source delivery pipe 4 and the second water source delivery pipe 5 can be fixed by the square outer shell 6 and the fixed connection rings 13 fixedly sleeved on the outer surface of the fireproof and flame-retardant protective layer 15 and connected to the square outer shell 6 through the fixed connecting rods 14, preventing them from being pulled too far away from the cable.

[0023] A filling protection sleeve 17 fixedly sleeved on the outer surface of the fireproof and flame-retardant protection layer 15 is provided between multiple U-shaped metal water pipes 7 inside the cable protection sleeve 16. A flame-retardant and fire-extinguishing mechanism 2 is fixedly installed on the outer surface of the filling protection sleeve 17. The flame-retardant and fire-extinguishing mechanism 2 includes a metal annular outer shell 201, multiple gel through holes 202, blocking heads 203 with the same number as the gel through holes 202, a rubber sleeve 204, an annular storage groove 214, a flame-retardant gel 205, six arc-shaped pushing plates 206, and six pushing mechanisms. The multiple gel through holes 202 are arranged in a ring on the outer surface of the metal annular outer shell 201. The multiple blocking heads 203 are respectively plugged into the multiple gel through holes 202. The rubber sleeve 204 is sleeved on the outer surface of the metal annular outer shell 201, and the inner wall of the rubber sleeve 204 is fixed to all the blocking heads 203; The annular storage groove 214 is located inside the metal annular outer shell 201, and the flame-retardant gel 205 is filled inside the annular storage groove 214; The six arc-shaped pushing plates 206 are respectively located at the six end corners inside the flame-retardant gel 205. The surface of the arc-shaped pushing plate 206 facing the inner wall of the metal annular outer shell 201 is in contact with the inner wall of the metal annular outer shell 201, and the six pushing mechanisms can respectively push the six arc-shaped pushing plates 206 outwards.

[0024] The pushing mechanism includes two cylindrical grooves 207. Inside the cylindrical grooves 207, there are cylindrical heads 208 fixed to the inner wall of the metal annular housing 201. Inside the cylindrical heads 208, there are spring grooves 209. Inside the spring grooves 209, there are springs 210. One end of the spring 210 is connected to a pushing ring 211. The axis of the pushing ring 211 is connected to a pushing rod 212, and the surface of the pushing rod 212 facing the inner wall of the cylindrical groove 207 is fixed to the inner wall of the cylindrical groove 207. The outer surfaces of a plurality of filling protection sleeves 17 located between the cable core 1 and the fireproof and flame-retardant protection layer 15 are all installed on a flame-retardant extinguishing mechanism 2. When this cable is accidentally ignited, as the fire spreads, it will burn through the rubber sleeve 204 sleeved on the outer surface of the metal annular housing 201 and the blocking head 203 fixed to the inner wall of this rubber sleeve 204. After the blocking head 203 is completely burned out, the gel through-hole 202 blocked by the blocking head 203 will be opened. Then, through the spring force of the compressed spring 210, the pushing ring 211, the pushing rod 212, and the arc-shaped pushing plate 206 fixed to the pushing rod 212 can be pushed outwards. Through the outwardly pushed arc-shaped pushing plate 206, the flame-retardant gel 205 located inside the annular receiving groove 214 can be extruded from the opened gel through-hole 202. The flame-retardant gel 205 extruded to the outside will cover the surface of the burning cable, thereby blocking oxygen and reducing the burning speed. Through the above technical solution, the fireproof and flame-retardant effect of the equipment is improved. And if the fire source is not large in the initial stage of the fire, covering the outer surface of the cable with the flame-retardant gel 205 may directly extinguish the ignited cable.

[0025] A gap material pushing mechanism 216 is provided between two adjacent arc-shaped pushing plates 206. The gap material pushing mechanism 216 includes an arc-shaped sleeve 217 and an arc-shaped plate 218. The arc-shaped sleeve 217 and the arc-shaped plate 218 are both arc-shaped as a whole. The arc-shaped plate 218 is movably inserted into the inside of the arc-shaped sleeve 217, and the outer surface of the arc-shaped plate 218 is slidably connected to the inner wall of the arc-shaped sleeve 217. The surfaces of the arc-shaped sleeve 217 and the arc-shaped plate 218 facing the two arc-shaped pushing plates 206 are respectively slidably connected to the two arc-shaped pushing plates 206, and the surfaces of the arc-shaped sleeve 217 and the arc-shaped plate 218 facing the flame-retardant gel 205 are in contact with the flame-retardant gel 205. During the process of the two adjacent arc-shaped pushing plates 206 being pushed outwards, the arc-shaped sleeve 217 and the arc-shaped plate 218 respectively slidably connected to them will move together. Through the arc-shaped sleeve 217 and the arc-shaped plate 218 moving outwards synchronously with the arc-shaped pushing plates 206, the flame-retardant gel 205 located between the arc-shaped pushing plates 206 can be extruded to the outside. Through the above technical solution, it can be ensured that all the flame-retardant gel 205 is extruded to the outside; As the arc-shaped pushing plate 206 moves, the arc-shaped plate 218 will be withdrawn from the inside of the arc-shaped sleeve 217. Through this structure, it is possible to prevent the situation where the arc-shaped plate 218 and the arc-shaped sleeve 217 jam the arc-shaped pushing plate 206 and prevent it from moving outwards.

[0026] The outer surface of the pushing ring 211 fits against the inner wall of the spring groove 209, and the pushing ring 211 is slidably connected to the spring groove 209; through this structure, it is possible to ensure the stability of the arc-shaped pushing plate 206 being pushed outwards and prevent it from shaking.

[0027] A circle of limit plugs 213 is fixedly provided on the inner wall of the metal annular outer shell 201. An outer limit slot 215 located on the outer surface of the filling and protection sleeve 17 is provided on the outside of the limit plug 213. The outer surface of the limit plug 213 fits against the inner wall of the limit slot 215; through the limit plug 213 and the limit slot 215, the entire metal annular outer shell 201 can be fixed in the current position to prevent its position from changing due to external influences.

[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A composite fireproof and flame-retardant cable, comprising a cable core (1), characterized in that: The outer surface of the cable core (1) is fixedly sleeved with a fireproof and flame-retardant protection layer (15), and the outer surface of the fireproof and flame-retardant protection layer (15) is fixedly sleeved with a cable protection sleeve (16); A cable temperature adjustment mechanism is arranged below the cable protection sleeve (16). The cable temperature adjustment mechanism includes a water pump (3), a plurality of first water source delivery pipes (4), second water source delivery pipes (5) with the same number as the first water source delivery pipes (4), and a U-shaped metal water pipe (7). The plurality of second water source delivery pipes (5) are respectively located on the left side in front of the plurality of first water source delivery pipes (4). Adjacent second water source delivery pipes (5) and first water source delivery pipes (4) are connected by a U-shaped metal water pipe (7). The top end of the U-shaped metal water pipe (7) is located outside the fireproof and flame-retardant protection layer (15), and the rear end surface of the last first water source delivery pipe (4) is connected to the water pump (3); A filling protection sleeve (17) fixedly sleeved on the outer surface of the fireproof and flame-retardant protection layer (15) is arranged between the plurality of U-shaped metal water pipes (7) inside the cable protection sleeve (16). A flame-retardant extinguishing mechanism (2) is fixedly installed on the outer surface of the filling protection sleeve (17). The flame-retardant extinguishing mechanism (2) includes a metal annular outer shell (201), a plurality of gel through holes (202), plugging heads (203) with the same number as the gel through holes (202), a rubber sleeve (204), an annular receiving groove (214), a flame-retardant gel (205), six arc-shaped pushing plates (206), and six pushing mechanisms. The plurality of gel through holes (202) are arranged in a ring on the outer surface of the metal annular outer shell (201). The plurality of plugging heads (203) are respectively plugged inside the plurality of gel through holes (202). The rubber sleeve (204) is sleeved on the outer surface of the metal annular outer shell (201), and the inner wall of the rubber sleeve (204) is fixed to all the plugging heads (203); The annular receiving groove (214) is located inside the metal annular outer shell (201), and the flame-retardant gel (205) is filled inside the annular receiving groove (214); The six arc-shaped pushing plates (206) are respectively located at the six end corners inside the flame-retardant gel (205). The surface of the arc-shaped pushing plate (206) facing the inner wall of the metal annular outer shell (201) is in contact with the inner wall of the metal annular outer shell (201), and the six pushing mechanisms can respectively push the six arc-shaped pushing plates (206) outwards.

2. The composite fireproof and flame-retardant cable according to claim 1, wherein: A plurality of water outlet holes (10) are arranged on the upper end surfaces of all the U-shaped metal water pipes (7); A rubber arc-shaped cover plate (12) is arranged above the U-shaped metal water pipe (7). A plurality of water outlet plugging heads (11) are fixedly arranged on the lower end surface of the rubber arc-shaped cover plate (12). The positions, numbers, and shapes of the water outlet plugging heads (11) correspond to the positions, numbers, and shapes of the water outlet holes (10).

3. A composite fireproof and flame-retardant cable according to claim 1, characterized in that: Inside the inner side of the top end of the U-shaped metal water pipe (7), there is a U-shaped pipe fixing sleeve (8) fixedly sleeved on the outer surface of the fireproof and flame-retardant protective layer (15). On the upper end surface of the U-shaped pipe fixing sleeve (8), there is a U-shaped pipe fixing groove (9), and the top end of the U-shaped metal water pipe (7) is clamped into the inside of the U-shaped pipe fixing groove (9).

4. A composite fireproof and flame-retardant cable according to claim 1, characterized in that: On the outer side of the bottom end of the U-shaped metal water pipe (7), a square outer shell (6) is fixedly sleeved. The rear end of the first water source delivery pipe (4) in front of the U-shaped metal water pipe (7) is clamped into the inside of the square outer shell (6), and the front end of the second water source delivery pipe (5) behind the U-shaped metal water pipe (7) is clamped into the inside of the square outer shell (6).

5. The composite fireproof and flame-retardant cable according to claim 4, wherein: On both sides above the square outer shell (6), there is a fixed connection ring (13) fixedly sleeved on the outer surface of the fireproof and flame-retardant protective layer (15). On both sides of the lower end surface of the fixed connection ring (13), there is a fixed connecting rod (14) fixedly connected, and the lower end surface of the fixed connecting rod (14) is fixed to the square outer shell (6).

6. A composite fireproof and flame-retardant cable according to claim 1, characterized in that: The pushing mechanism includes two cylindrical grooves (207). Inside the cylindrical grooves (207), there is a cylindrical head (208) fixed to the inner wall of the metal annular outer shell (201). Inside the cylindrical head (208), there is a spring groove (209). Inside the spring groove (209), there is a spring (210). One end of the spring (210) is connected to a pushing ring (211). The axis of the pushing ring (211) is connected to a pushing rod (212), and the surface of the pushing rod (212) facing the inner wall of the cylindrical groove (207) is fixed to the inner wall of the cylindrical groove (207).

7. A composite fireproof and flame-retardant cable according to claim 1, characterized in that: Between two adjacent arc-shaped pushing plates (206), there is a gap material pushing mechanism (216). The gap material pushing mechanism (216) includes an arc-shaped sleeve (217) and an arc-shaped plate (218). The arc-shaped sleeve (217) and the arc-shaped plate (218) are both arc-shaped as a whole. The arc-shaped plate (218) is movably inserted into the inside of the arc-shaped sleeve (217), and the outer surface of the arc-shaped plate (218) is slidably connected to the inner wall of the arc-shaped sleeve (217).

8. A composite fireproof and flame-retardant cable according to claim 7, characterized in that: The surfaces of the arc-shaped sleeve (217) and the arc-shaped plate (218) facing the two arc-shaped pushing plates (206) are respectively slidably connected to the two arc-shaped pushing plates (206), and the surfaces of the arc-shaped sleeve (217) and the arc-shaped plate (218) facing the flame-retardant gel (205) are in contact with the flame-retardant gel (205).

9. The composite fireproof and flame-retardant cable according to claim 6, characterized in that: The outer surface of the pushing ring (211) is in contact with the inner wall of the spring groove (209), and the pushing ring (211) is slidably connected to the spring groove (209).

10. A composite fireproof and flame-retardant cable according to claim 1, characterized in that: On the inner wall of the metal annular outer shell (201), a circle of limit plugs (213) is fixedly provided. On the outer side of the limit plugs (213), there are limit slots (215) on the outer surface of the filling protection sleeve (17). The outer surface of the limit plugs (213) is in contact with the inner wall of the limit slots (215).

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