A composite fire-retardant cable

Abstract

The present invention relates to the field of cable technology, specifically to a composite fire-retardant cable, which solves the problem that the fire retardancy of this cable is low and that it is affected by high or low temperatures in the outside world. It comprises a cable core, the outer surface fixed sleeve of the cable core is provided with a fire-retardant protective layer, the outer surface fixed sleeve of the fire-retardant protective layer is provided with a cable protective sleeve; a cable temperature adjustment mechanism is provided below the cable protective sleeve, and the cable temperature adjustment mechanism includes a water pump. Through the flame retardant fire extinguishing mechanism of the present invention, when this cable is accidentally ignited, the flame retardant gel will be automatically extruded and covered on the outer surface of the cable at the ignition position, and at the same time, the cable temperature adjustment mechanism can be used to cool or heat it according to the temperature of the external environment. Through the above technical solution, the fire retardancy of the equipment is improved while preventing the high or low temperature in the outside world from affecting the cable.

Description

Technical Field

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

[0002] Cable is a wire product used to transmit electrical energy, signals or realize electromagnetic energy conversion. It has many types, including composite fire retardant cables;

[0003] Composite fire-retardant cable is a special cable that can maintain circuit integrity for a certain period of time when a fire occurs. This cable uses special flame-retardant materials and structural design, which enables it to maintain circuit continuity in flames 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 high-temperature flames. It itself has the characteristics of being difficult to burn and flame-retardant.

[0004] However, this type of composite fire-retardant cable can only resist flames through the flame-retardant material used to constitute its own protective layer. Its own fire-retardant performance is low, and when the external temperature is too high, the possibility of spontaneous combustion of the cable will increase. Excessive temperature can easily soften the cable skin, thereby accelerating its aging rate. When the external temperature is too low, the power loss of the cable will increase, and too low a temperature may also affect the toughness of the cable, thereby increasing the risk of its breakage. The cable has low resistance to high and low temperatures. Therefore, it does not meet existing needs. We have proposed a composite fire-retardant cable. Summary of the Invention

[0005] The object of the present invention is to provide a composite fireproof and flame-retardant cable to solve the problems proposed in the above background technology that the composite fireproof and flame-retardant cable can only resist flames by the flame-retardant material used to constitute its own protective layer, its own fireproof and flame-retardant performance is low, and when the external temperature is too high, the possibility of spontaneous combustion of the cable will increase, and excessively high temperature will easily soften the cable skin, thereby accelerating its aging rate, and when the external temperature is too low, the power loss of the cable will increase, and too low temperature may also affect the toughness of the cable, thereby increasing its risk of breakage, and the cable has low high and low temperature resistance.

[0006] To achieve the above object, the present invention provides the following technical solution: a composite fire-retardant cable, comprising a cable core, the outer surface of the cable core is fixedly covered with a fire-retardant protective layer, and the outer surface of the fire-retardant protective layer is fixedly covered with a cable protective sheath;

[0007] A cable temperature adjustment mechanism is provided below the cable protective sleeve, and the cable temperature adjustment mechanism includes a water pump, multiple first water source delivery pipes, the same number of second water source delivery pipes as the first water source delivery pipes, and a U-shaped metal water pipe. The multiple second water source delivery pipes are respectively located on the left side in front of the multiple first water source delivery pipes, and the adjacent second water source delivery pipes and first water source delivery pipes are connected by a U-shaped metal water pipe. The top end of the U-shaped metal water pipe is located outside the fire retardant protective layer, and the rear end face of the first water source delivery pipe located at the rear is connected to the water pump;

[0008] A filling protective sleeve fixedly sleeved on the outer surface of the fire-retardant protective layer is provided between the multiple U-shaped metal water pipes located inside the cable protective sleeve. A flame-retardant fire extinguishing mechanism is fixedly installed on the outer surface of the filling protective sleeve. The flame-retardant fire extinguishing mechanism includes a metal annular shell, multiple gel through-holes, blocking heads with the same number as the gel through-holes, a rubber sleeve, an annular receiving groove, a flame-retardant gel, six arc-shaped pushing plates and six pushing mechanisms. The multiple gel through-holes are arranged in a ring shape on the outer surface of the metal annular shell, the multiple blocking heads are respectively plugged in the interior of the multiple gel through-holes, the rubber sleeve is sleeved on the outer surface of the metal annular shell, and the inner wall of the rubber sleeve is fixed to all the blocking heads.

[0009] The annular receiving groove is located inside the metal annular shell, and the flame retardant gel is filled inside the annular receiving groove;

[0010] The six arc-shaped pushing plates are respectively located at the six end corners inside the flame retardant gel, and the surfaces of the arc-shaped pushing plates facing the inner wall of the metal annular shell are in contact with the inner wall of the metal annular shell, and the six pushing mechanisms can push the six arc-shaped pushing plates outward respectively.

[0011] Preferably, the upper end surfaces of all the U-shaped metal water pipes are provided with a plurality of water outlet holes;

[0012] A rubber arc cover is provided above the U-shaped metal water pipe, and a plurality of water outlet plugging heads are fixedly provided on the lower end surface of the rubber arc cover. The position, number and shape of the water outlet plugging heads correspond to the position, number and shape of the water outlet holes.

[0013] Preferably, a U-shaped tube fixing sleeve is provided on the inner side of the top end of the U-shaped metal water pipe, and the U-shaped tube fixing sleeve is fixed on the outer surface of the fire-retardant protective layer. The upper end surface of the U-shaped tube fixing sleeve is provided with a U-shaped tube fixing groove, and the top end of the U-shaped metal water pipe is stuck in the inside of the U-shaped tube fixing groove.

[0014] Preferably, a square shell is provided on the outer fixed sleeve of the bottom end of the U-shaped metal water pipe, the rear end of the first water source delivery pipe located in front of the U-shaped metal water pipe is stuck in the interior of the square shell, and the front end of the second water source delivery pipe located behind the U-shaped metal water pipe is stuck in the interior of the square shell.

[0015] Preferably, a fixed connecting ring is provided on both sides above the square shell and is fixedly sleeved on the outer surface of the fire-retardant protective layer. A fixed connecting rod is fixedly connected to both sides of the lower end surface of the fixed connecting ring, and the lower end surface of the fixed connecting rod is fixed to the square shell.

[0016] Preferably, the pushing mechanism includes two cylindrical grooves, the interior of the cylindrical groove contains a cylindrical head fixed to the inner wall of the metal annular shell, the interior of the cylindrical head contains a spring groove, the interior of the spring groove contains 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.

[0017] Preferably, a gap material pushing mechanism is provided between two adjacent arc-shaped pushing plates, and 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 interior of the arc-shaped sleeve, and the outer surface of the arc-shaped plate is slidingly connected to the inner wall of the arc-shaped sleeve.

[0018] Preferably, the surfaces of the arc sleeve and the arc plate facing the two arc pushing plates are respectively slidably connected to the two arc pushing plates, and the surfaces of the arc sleeve and the arc plate facing the flame retardant gel are in contact with the flame retardant gel.

[0019] Preferably, the outer surface of the push ring fits against the inner wall of the spring groove, and the push ring and the spring groove are slidably connected.

[0020] Preferably, a circle of limiting plugs is fixedly provided on the inner wall of the metal annular shell, and a limiting slot is provided on the outer side of the limiting plug and located on the outer surface of the filling protective sleeve, and the outer surface of the limiting plug fits with the inner wall of the limiting slot.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention has a flame retardant fire extinguishing mechanism installed on the outer surfaces of multiple filling protective sleeves located between the cable core and the fire retardant protective layer. When the cable is accidentally ignited, the spread of the fire will burn through the rubber sleeve arranged on the outer surface of the metal annular shell and the blocking head fixed to the inner wall of the rubber sleeve. When the blocking head is completely burned, the gel through-hole blocked by the blocking head will be opened, and then the flame retardant gel located inside the metal annular shell will be squeezed out of the gel through-hole by the arc-shaped pushing plate pushed outward. The flame retardant gel squeezed to the outside will cover the surface of the burning cable, thereby blocking oxygen and reducing the combustion speed. The above technical solution improves the fire retardant effect of the equipment. If the fire source is not large at the initial stage of the fire, it is possible to directly extinguish the ignited cable by covering the outer surface of the cable with the flame retardant gel.

[0023] 2. The present invention also provides a plurality of U-shaped metal water pipes connected to the first water source delivery pipe and the second water source delivery pipe between the cable core and the fire retardant protective layer, and the first water source delivery pipe located at the rear is connected to the water pump. When the external 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 U-shaped metal water pipe through the water pump, so as to ensure that the cable can maintain a normal temperature in a high or low temperature environment and ensure that it can be used normally. The above technical solution improves the overall environmental adaptability of the cable and prevents the cable from being affected by external high or low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0025] Figure 2 For the present invention Figure 1 A magnified view of the structure at point A;

[0026] Figure 3 For the present invention Figure 1 Schematic diagram of the internal structure at A in the middle;

[0027] Figure 4 For the present invention Figure 2 Schematic diagram of the internal structure of the flame retardant and fire extinguishing mechanism at B in the middle;

[0028] Figure 5 For the present invention Figure 4 A magnified view of the structure at C in the middle;

[0029] Figure 6 For the present invention Figure 5 A magnified view of the structure at D in the middle;

[0030] Figure 7 For the present invention Figure 2 Main view of the flame retardant and fire extinguishing mechanism at B in the middle.

[0031] Figure: 1, cable core; 2, flame retardant fire extinguishing mechanism; 201, metal ring 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 storage groove; 215, limit slot; 216, spacer Gap material pushing mechanism; 217, arc sleeve; 218, arc plate; 3, water pump; 4, first water source delivery pipe; 5, second water source delivery pipe; 6, square shell; 7, U-shaped metal water pipe; 8, U-shaped pipe fixing sleeve; 9, U-shaped pipe fixing groove; 10, water outlet; 11, water outlet plug; 12, rubber arc cover; 13, fixed connecting ring; 14, fixed connecting rod; 15, fire retardant protective layer; 16, cable protection sleeve; 17, filling protection sleeve. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] See also Figures 1 to 7 The present invention provides an embodiment of a composite fire-retardant cable, comprising a cable core 1, a fire-retardant protective layer 15 fixedly provided on the outer surface of the cable core 1, and a cable protective cover 16 fixedly provided on the outer surface of the fire-retardant protective layer 15;

[0034] A cable temperature adjustment mechanism is provided below the cable protective sheath 16. The cable temperature adjustment mechanism includes a water pump 3, a plurality of first water source delivery pipes 4, a second water source delivery pipe 5 having the same number as the first water source delivery pipe 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. The adjacent second water source delivery pipes 5 and the 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 fire retardant protective layer 15, and the rear end face of the first water source delivery pipe 4 located at the rear is connected to the water pump 3. They are connected; 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 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 U-shaped metal water pipe 7 will transfer its own cold air or hot air to the cable core 1, the fire retardant protective layer 15 and the cable protective sheath 16, so as to ensure that the cable can maintain a normal temperature in a high or low temperature environment and ensure that it can be used normally. The above technical solution improves the overall environmental adaptability of the cable and prevents the cable from being affected by external high or low temperatures.

[0035] The upper end surfaces of all U-shaped metal water pipes 7 are provided with a plurality of water outlet holes 10;

[0036] A rubber arc cover 12 is provided above the U-shaped metal water pipe 7. A plurality of water outlet plugs 11 are fixedly provided on the lower end surface of the rubber arc cover 12. The position, number and shape of the water outlet plugs 11 correspond to the position, number and shape of the water outlet holes 10. When the cable temperature adjustment mechanism is normally used, the water outlet plugs 11 fixed to the lower end surface of the rubber arc cover 12 can block the water outlet holes 10 located on the upper end surface of the U-shaped metal water pipe 7, thereby preventing the water source inside the U-shaped metal water pipe 7 from flowing into the interior of the cable when the cable is cooled or heated, thereby preventing the cable from being damaged.

[0037] If the cable is accidentally ignited, as the fire spreads, the rubber arc cover 12 located on the upper end face of the U-shaped metal water pipe 7 and the outlet plug 11 fixed to the lower end face of the rubber arc cover 12 will be completely burned, and the water outlet 10 will be opened. Thereafter, the water flowing inside the U-shaped metal water pipe 7 will be sprayed out through the opened water outlet 10. The water sprayed from the water outlet 10 can directly extinguish the cable. Through the above technical solution, when the cable is ignited, water can be automatically sprayed to the ignition position to extinguish the fire and prevent the fire from spreading.

[0038] The inner side of the top end of the U-shaped metal water pipe 7 is provided with a U-shaped tube fixing sleeve 8 fixed on the outer surface of the fire-retardant protective layer 15. The upper end surface of the U-shaped tube fixing sleeve 8 is provided with a U-shaped tube fixing groove 9, and the top end of the U-shaped metal water pipe 7 is stuck in the inside of the U-shaped tube fixing groove 9; the U-shaped tube fixing sleeve 8 fixed on the outer surface of the fire-retardant protective layer 15 can fix the U-shaped metal water pipe 7 in the current position to prevent it from moving.

[0039] A square shell 6 is fixedly sleeved on the outer side of the bottom end of the U-shaped metal water pipe 7, and the rear end of the first water source delivery pipe 4 located in front of the U-shaped metal water pipe 7 is stuck in the interior of the square shell 6, and the front end of the second water source delivery pipe 5 located behind the U-shaped metal water pipe 7 is stuck in the interior of the square shell 6; both sides above the square shell 6 are provided with a fixed connecting ring 13 fixedly sleeved on the outer surface of the fire retardant protective layer 15, and both sides of the lower end surface of the fixed connecting ring 13 are fixedly connected to a fixed connecting rod 14, and the lower end surface of the fixed connecting rod 14 is fixed to the square shell 6; the first water source delivery pipe 4 and the second water source delivery pipe 5 can be fixed by the square shell 6 and the fixed connecting ring 13 fixedly sleeved on the outer surface of the fire retardant protective layer 15 connected to the square shell 6 by the fixed connecting rod 14 to prevent them from being pulled too far away from the cable.

[0040] A filling protective sleeve 17 fixedly sleeved on the outer surface of the fire-retardant protective layer 15 is provided between the multiple U-shaped metal water pipes 7 located inside the cable protective sleeve 16. The outer surface of the filling protective sleeve 17 is fixedly installed with a flame retardant fire extinguishing mechanism 2. The flame retardant fire extinguishing mechanism 2 includes a metal annular shell 201, multiple gel through-holes 202, blocking heads 203 of 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 multiple gel through-holes 202 are arranged in a ring shape on the outer surface of the metal annular shell 201, and the multiple blocking heads 203 are respectively plugged in the interior of the multiple gel through-holes 202. The rubber sleeve 204 is sleeved on the outer surface of the metal annular shell 201, and the inner wall of the rubber sleeve 204 is fixed to all the blocking heads 203.

[0041] The annular receiving groove 214 is located inside the metal annular housing 201 , and the flame retardant gel 205 is filled inside the annular receiving groove 214 ;

[0042] The six arc-shaped pushing plates 206 are respectively located at the six end corners inside the flame retardant gel 205. The surfaces of the arc-shaped pushing plates 206 facing the inner wall of the metal annular shell 201 are in contact with the inner wall of the metal annular shell 201, and the six pushing mechanisms can push the six arc-shaped pushing plates 206 outward respectively.

[0043] The pushing mechanism includes two cylindrical grooves 207, the interior of the cylindrical groove 207 contains a cylindrical head 208 fixed to the inner wall of the metal annular shell 201, the interior of the cylindrical head 208 contains a spring groove 209, the interior of the spring groove 209 contains 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; the outer surfaces of the multiple filling protective sleeves 17 located between the cable core 1 and the fire retardant protective layer 15 are all installed on a flame retardant fire extinguishing mechanism 2. When this cable is accidentally ignited, as the fire spreads, the rubber sleeve 204 sleeved on the outer surface of the metal annular shell 201 and the rubber sleeve 204 fixed to the inner wall of the rubber sleeve 204 will be burned. Blocking head 203, when the blocking head 203 is completely burned, the gel through hole 202 blocked by the blocking head 203 will be opened, and then the spring force of the squeezed spring 210 can push the push ring 211, the push rod 212 and the arc-shaped pushing plate 206 fixed between the push rod 212 outward, and the arc-shaped pushing plate 206 pushed outward can squeeze the flame retardant gel 205 located inside the annular receiving groove 214 out of the opened gel through hole 202, and the flame retardant gel 205 squeezed to the outside will cover the surface of the burning cable, thereby blocking oxygen and reducing the burning speed. The above technical solution improves the fire retardant effect of the equipment, and if the fire source is not large at the initial stage of the fire, it is possible to directly extinguish the ignited cable by covering the flame retardant gel 205 on the outer surface of the cable.

[0044] 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 interior 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 between the two arc-shaped pushing plates 206, and the arc-shaped sleeve 217 is slidably connected to the inner wall of the arc-shaped sleeve 217. 7 and the curved plate 218 facing the flame retardant gel 205 are in contact with the flame retardant gel 205; when the two adjacent curved pushing plates 206 are pushed outward, the curved sleeves 217 and the curved plates 218 respectively connected thereto in a sliding manner will move together, and the curved sleeves 217 and the curved plates 218 moving outward synchronously with the curved pushing plates 206 can squeeze the flame retardant gel 205 between the curved pushing plates 206 to the outside. The above technical solution can ensure that all the flame retardant gel 205 is squeezed out to the outside;

[0045] As the arc-shaped pushing plate 206 moves, the arc-shaped plate 218 will be drawn out from the inside of the arc-shaped sleeve 217. This structure can prevent the arc-shaped plate 218 and the arc-shaped sleeve 217 from blocking the arc-shaped pushing plate 206 and preventing it from moving outward.

[0046] The outer surface of the push ring 211 fits against the inner wall of the spring groove 209 , and the push ring 211 and the spring groove 209 are slidably connected. This structure ensures the stability of the arc-shaped push plate 206 being pushed outward and prevents it from shaking.

[0047] A circle of limiting plugs 213 is fixedly provided on the inner wall of the metal ring shell 201, and a limiting slot 215 is provided on the outer side of the limiting plug 213, which is located on the outer surface of the filling protective sleeve 17. The outer surface of the limiting plug 213 fits with the inner wall of the limiting slot 215; the metal ring shell 201 can be fixed as a whole in the current position through the limiting plug 213 and the limiting slot 215 to prevent its position from changing due to external influences.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A composite fire-retardant cable, comprising a cable core (1), characterized in that: The outer surface fixed sleeve of the cable core (1) is provided with a fire-retardant protective layer (15), and the outer surface fixed sleeve of the fire-retardant protective layer (15) is provided with a cable protective sleeve (16); A cable temperature adjustment mechanism is provided below the cable protective sleeve (16), and the cable temperature adjustment mechanism comprises a water pump (3), a plurality of first water source delivery pipes (4), a second water source delivery pipe (5) having the same number as the first water source delivery pipes (4), and a U-shaped metal water pipe (7), wherein 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), and adjacent second water source delivery pipes (5) and first water source delivery pipes (4) are connected via a U-shaped metal water pipe (7), the top end of the U-shaped metal water pipe (7) is located outside the fire retardant protective layer (15), and the rear end face of the first water source delivery pipe (4) located at the rear is connected to the water pump (3); A filling protective sleeve (17) fixedly mounted on the outer surface of the fire-retardant protective layer (15) is provided between the plurality of U-shaped metal water pipes (7) located inside the cable protective sleeve (16), and a flame retardant fire extinguishing mechanism (2) is fixedly mounted on the outer surface of the filling protective sleeve (17), and the flame retardant fire extinguishing mechanism (2) comprises a metal annular shell (201), a plurality of gel through holes (202), a blocking head (203) having the same number as the gel through holes (202), a rubber sleeve (204), a ring shaped receiving groove (214), a flame retardant gel (205), six arc-shaped pushing plates (206) and six pushing mechanisms, a plurality of gel through holes (202) are arranged in a ring shape on the outer surface of the metal ring shell (201), a plurality of blocking heads (203) are respectively plugged in the interior of the plurality of gel through holes (202), the rubber sleeve (204) is sleeved on the outer surface of the metal ring shell (201), and the inner wall of the rubber sleeve (204) is fixed to all the blocking heads (203); The annular receiving groove (214) is located inside the metal annular housing (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 six end corners inside the flame-retardant gel (205); the surfaces of the arc-shaped pushing plates (206) facing the inner wall of the metal annular shell (201) are in contact with the inner wall of the metal annular shell (201); and the six pushing mechanisms can respectively push the six arc-shaped pushing plates (206) outward.

2. The composite fire-retardant cable according to claim 1, characterized in that: The upper end surfaces of all the U-shaped metal water pipes (7) are provided with a plurality of water outlet holes (10); A rubber arc-shaped cover plate (12) is provided above the U-shaped metal water pipe (7), and a plurality of water outlet plugs (11) are fixedly provided on the lower end surface of the rubber arc-shaped cover plate (12), wherein the position, number and shape of the water outlet plugs (11) correspond to the position, number and shape of the water outlet holes (10).

3. The composite fire-retardant cable according to claim 1, characterized in that: A U-shaped tube fixing sleeve (8) is provided on the inner side of the top end of the U-shaped metal water pipe (7) and is fixedly sleeved on the outer surface of the fire-retardant protective layer (15). A U-shaped tube fixing groove (9) is provided on the upper end surface of the U-shaped tube fixing sleeve (8), and the top end of the U-shaped metal water pipe (7) is inserted into the interior of the U-shaped tube fixing groove (9).

4. The composite fire-resistant and flame-retardant cable according to claim 1, characterized in that: 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) located in front of the U-shaped metal water pipe (7) is inserted into the interior of the square outer shell (6); and the front end of the second water source delivery pipe (5) located behind the U-shaped metal water pipe (7) is inserted into the interior of the square outer shell (6).

5. The composite fire-resistant and flame-retardant cable according to claim 4, characterized in that: A fixed connecting ring (13) is provided on both sides of the upper side of the square shell (6) and is fixedly sleeved on the outer surface of the fire-retardant protective layer (15). A fixed connecting rod (14) is fixedly connected to both sides of the lower end surface of the fixed connecting ring (13), and the lower end surface of the fixed connecting rod (14) is fixed to the square shell (6).

6. The composite fire-resistant and flame-retardant cable according to claim 1, characterized in that: The pushing mechanism includes two cylindrical grooves (207), the cylindrical grooves (207) contain cylindrical heads (208) fixed to the inner wall of the metal annular shell (201), the cylindrical heads (208) contain spring grooves (209), the spring grooves (209) contain 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).

7. The composite fire-resistant and flame-retardant cable according to claim 1, characterized in that: A gap material pushing mechanism (216) is provided between two adjacent arc-shaped pushing plates (206). The gap material pushing mechanism (216) comprises 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 interior 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. The composite fire-resistant and flame-retardant cable according to claim 7, characterized in that: The surfaces of the arc sleeve (217) and the arc plate (218) facing the two arc pushing plates (206) are respectively slidably connected to the two arc pushing plates (206), and the surfaces of the arc sleeve (217) and the arc plate (218) facing the flame retardant gel (205) are in contact with the flame retardant gel (205).

9. The composite fire-resistant and flame-retardant cable according to claim 6, characterized in that: The outer surface of the push ring (211) fits against the inner wall of the spring groove (209), and the push ring (211) and the spring groove (209) are slidably connected.

10. The composite fire-resistant and flame-retardant cable according to claim 1, characterized in that: A circle of limiting plugs (213) is fixedly provided on the inner wall of the metal annular shell (201), and a limiting slot (215) is provided on the outer side of the limiting plug (213) and is located on the outer surface of the filling protective sleeve (17), and the outer surface of the limiting plug (213) is in contact with the inner wall of the limiting slot (215).

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