Flame-retardant cable and apparatus for producing the same

Abstract

This invention belongs to the field of cable manufacturing technology, specifically a flame-retardant cable and its manufacturing equipment. Addressing the problem that existing flame-retardant cable manufacturing equipment cannot add fire-fighting and fire-resistant measures to the produced cables, the following solution is proposed: the cable, with the conductive core as the center, is sequentially covered from the inside out with a shielding layer, an insulation layer, a flame-retardant layer, an aluminum alloy tape armor layer, and a wear-resistant sheath layer; wherein the conductive core is a copper core, and the shielding layer is a polyethylene shielding layer. The flame-retardant cable and its manufacturing equipment disclosed in this invention can achieve the function of embedding a polymer flexible tube in the cable beforehand during the cable manufacturing process. Therefore, when the cable encounters a fire and the outer sheath is damaged, the heat-damaged polymer flexible tube can rapidly spray dry powder using pressurized carbon dioxide, thereby extinguishing the ignition point and protecting the cable. This greatly improves the safety of the cable and personnel, and protects the cable's functionality.

Description

Technical Field

[0001] This invention relates to the field of cable manufacturing technology, and in particular to a flame-retardant cable and its manufacturing equipment. Background Technology

[0002] A cable is an electrical or signal transmission device, typically composed of several or groups of conductors, and characterized by internal conductivity and external insulation. Cables can be used to transmit electrical (magnetic) energy and information, realizing the conversion of electromagnetic energy. They are widely used in urban underground power grids, power plant lead-out lines, internal power supply in industrial and mining enterprises, and underwater power transmission lines across rivers and seas. There are many types of cables, including power cables, control cables, compensating cables, shielded cables, and high-temperature cables.

[0003] The existing flame-retardant cable manufacturing equipment produces cables that lack effective fire prevention measures in actual use, which can lead to electrical fires when the cables encounter open flames or short circuits, causing safety accidents to users and cables. Summary of the Invention

[0004] This invention discloses a flame-retardant cable and its preparation equipment, aiming to solve the technical problem in the prior art that existing flame-retardant cable preparation equipment cannot add fire-fighting and fireproofing measures to the produced cables.

[0005] This invention proposes a flame-retardant cable, wherein the cable is covered from the inside out with a shielding layer, an insulation layer, a flame-retardant layer, an aluminum alloy tape armor layer, and a wear-resistant sheath layer, with the conductive core as the center; wherein the conductive core is a copper core, the shielding layer is a polyethylene shielding layer, the insulation layer is foamed polytetrafluoroethylene, the flame-retardant layer is a flame-retardant compound rubber mixture, and the wear-resistant sheath layer is a rubber flame-retardant cable material mixture.

[0006] A flame-retardant cable, wherein the flame-retardant compound rubber mixture comprises the following components: 40-50 parts of nitrile rubber, 34-36 parts of ethylene propylene rubber, 15-20 parts of mixed flame retardant, 6-8 parts of flame retardant synergist, 10-15 parts of calcined clay, 4-5 parts of paraffin wax, 0.5-1 part of stearic acid, 1-2 parts of vulcanizing agent, 2-4 parts of carbon black, and 1-2 parts of accelerator; the flame-retardant compound rubber mixture comprises the following components: 40-50 parts of nitrile rubber, 34-36 parts of ethylene propylene rubber, 15-20 parts of mixed flame retardant, 6-8 parts of flame retardant synergist, 10-15 parts of calcined clay, 4-5 parts of paraffin wax, 0.5-1 part of stearic acid, 1-2 parts of vulcanizing agent, 2-4 parts of carbon black, and 1-2 parts of accelerator.

[0007] A flame-retardant cable preparation device includes a base plate, a semi-finished product C is arranged on the top of the base plate, a twisting spool is arranged outside the semi-finished product C, a connecting pipe is arranged outside the semi-finished cable, the twisting spool is movably connected to the side opposite to the connecting pipe, a fire-fighting installation module is arranged on the twisting spool, three circumferentially evenly distributed orifices are opened on the twisting spool, each orifice is slidably connected to a polymer hose, the ends of the three polymer hoses away from the twisting spool are all wrapped around the outside of the semi-finished product C, and a wire-binding machine is slidably connected to the outside of the three polymer hoses. The bottom of the wire-binding machine is fixedly connected to the upper side of the base plate, and a drying module is arranged on the side of the wire-binding machine away from the twisting spool. The drying module is located outside the semi-finished product C. The fire protection installation module includes a circular ring and an outer sleeve; The drying module includes a long sleeve.

[0008] In a preferred embodiment, a wire guide machine is provided on the outside of the semi-finished product C. The wire guide machine is fixedly connected to the side opposite to the connecting pipe. The bottom of the wire guide machine is fixedly connected to the upper side of the support plate. The inner wall of the ring is movably connected to the outside of the twisting disc. A toothed ring is fixedly connected to the side of the twisting disc near the wire guide machine. A base is fixedly connected to the bottom of the ring. The bottom of the base is fixedly connected to the upper side of the support plate. A slot is provided on the base, and a motor is fixedly connected in the slot. The output end of the motor is connected to a gear through a coupling. The gear meshes with the toothed ring, and the inner wall of the outer sleeve is fixedly connected to the outside of the connecting pipe. The outer sleeve is located near the wire guide machine. One side of the threading machine has three circumferentially spaced notches, each with a storage bottle fixedly connected to its inner wall. Each storage bottle has an infusion tube on the side furthest from the semi-finished product C, and a nozzle fixedly connected to the side closest to the semi-finished product C. Each connecting tube has three circumferentially spaced circular openings, the inner walls of which are fixedly connected to the exterior of the three nozzles. A pump is fixedly connected to the exterior of each storage bottle, and the output end of each pump is connected to a storage bottle on the same side via a conduit. Both the outer sleeve and the connecting tube have circular grooves, each containing a sliding rod. A bracket is slidably connected to the exterior of each sliding rod. The outer sides of the sleeve are fixedly connected to each other. Springs surround the outer sides of the movable rods, with one end of each spring fixedly connected to the outer side of the movable rod and the other end fixedly connected to the outer side of the bracket. An arc-shaped plate is fixedly connected to the end of the movable rod closest to the semi-finished product C. A scraper is fixedly connected to the side of the arc-shaped plate closest to the semi-finished product C, with the outer side of each scraper contacting the outer side of the semi-finished product C. The positions of the three scrapers are staggered. An annular seat is provided on the outer side of the semi-finished product C. The annular seat is fixedly connected to the side of the twisting disc away from the semi-finished product C. Three circumferentially spaced slits are opened on the annular seat, each containing a movably connected rotating part. Both the moving plate and the rotating plate have a glue storage box fixedly connected to the end away from the annular seat. The glue storage box has multiple equidistant spacer strips fixedly connected to the side opposite to the semi-finished product C. The glue storage box has multiple equidistant fine holes on the side near the semi-finished product C. The glue storage box has a conveying hose fixedly connected to the side away from the semi-finished product C. The conveying hose has a glue storage tank fixedly connected to the end away from the glue storage box. The glue storage tank is fixedly connected to the side opposite to the twisting disc. The twisting disc has three circumferentially equidistant elastic springs fixedly connected to the side near the annular seat. The ends of the elastic springs away from the twisting disc are fixedly connected to the outside of the rotating plate on the same side.

[0009] By incorporating a fire-fighting installation module, which utilizes a scraper and a glue storage box, the equipment can pre-embed polymer tubing within the cable during its manufacturing process. This allows the polymer tubing to be rapidly sprayed with pressurized carbon dioxide to extinguish any fires caused by heat damage to the outer sheath of the cable in the event of a fire. This effectively protects the cable, significantly improving the safety of both the cable and personnel, and preserving the cable's functionality.

[0010] In a preferred embodiment, a support frame is fixedly connected to the outside of the long sleeve. The support frame is fixedly connected to the side opposite to the wire-binding machine. The long sleeve is located outside the semi-finished product C. Three rectangular grooves are equidistantly distributed around the circumference of the long sleeve. A fan is installed in each of the rectangular grooves. Three equidistantly distributed stabilizing seats are fixedly connected to the outside of the long sleeve. Each stabilizing seat is movably connected to a lever arm 1. One end of each lever arm 1 is fixedly connected to the outside of the fan on the same side, and the other end is movably connected to a lever arm 2. The ends of the three lever arms 2 away from lever arms 1 are movably connected to the same integrated ring. The inner wall of the integrated ring is slidably connected to the outside of the long sleeve. The integrated ring has a narrow opening with a fixing bolt inside. A spiral guide ring is fixedly connected to the inner wall of the long sleeve.

[0011] By incorporating a drying module, which utilizes a spiral guide ring and a fan, the equipment can significantly accelerate the drying speed of the adhesive on the semi-finished product C, thereby increasing the adhesion of the polymer hose to the semi-finished product C. This prevents the polymer hose from slipping due to undried adhesive, ensuring the stability of the various structures within the cable and improving its performance.

[0012] As can be seen from the above, the flame-retardant cable and its preparation equipment provided by the present invention can embed polymer tubing in the cable in advance during the cable preparation process. When the cable encounters a fire and the outer sheath is damaged, the polymer tubing that is damaged by heat can quickly spray dry powder using pressurized carbon dioxide, thereby extinguishing the ignition point and achieving the function of protecting the cable. This greatly improves the safety of the cable and personnel and protects the cable's functionality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a flame-retardant cable manufacturing device proposed in this invention; Figure 2 This is a top view schematic diagram of the equipment for preparing flame-retardant cables proposed in this invention; Figure 3 This is a schematic diagram of the fire-fighting installation module structure of a flame-retardant cable preparation equipment proposed in this invention; Figure 4 This is a schematic diagram of the outer tube structure of a flame-retardant cable manufacturing device proposed in this invention; Figure 5 This is a schematic diagram of the annular seat structure of a flame-retardant cable manufacturing device proposed in this invention; Figure 6 This is a schematic diagram of the drying module structure of a flame-retardant cable preparation device proposed in this invention; Figure 7 This is a schematic diagram of the long sleeve structure of a flame-retardant cable preparation device proposed in this invention.

[0014] In the diagram: 1. Foundation plate; 2. Semi-finished cable; 3. Lead-in machine; 4. Connecting pipe; 5. Twisting spool; 6. Polymer hose; 7. Cable bundling machine; 8. Fire-fighting installation module; 801. Ring; 802. Base; 803. Motor; 804. Gear; 805. Gear ring; 806. Outer sleeve; 807. Storage bottle; 808. Infusion tube; 809. Nozzle; 810. Pump; 811. Movable rod; 812. Bracket; 813. Spring; 814. Curved plate 815. Scraper; 816. Annular seat; 817. Rotating plate; 818. Glue storage box; 819. Fine hole; 820. Spacer strip; 821. Elastic spring; 822. Glue storage tank; 823. Conveying hose; 9. Drying module; 901. Long sleeve; 902. Support frame; 903. Rectangular groove; 904. Spiral guide ring; 905. Fan; 906. Stabilizer; 907. Lever arm one; 908. Lever arm two; 909. Integration ring; 910. Fixing bolt. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0016] The flame-retardant cable and its preparation equipment disclosed in this invention are mainly applied to scenarios where existing flame-retardant cable preparation equipment cannot add fire-fighting and fireproofing measures to the produced cables.

[0017] A flame-retardant cable is provided, wherein the cable is covered from the inside out with a shielding layer, an insulation layer, a flame-retardant layer, an aluminum alloy tape armor layer, and a wear-resistant sheath layer, with the conductive core as the center; wherein the conductive core is a copper core, the shielding layer is a polyethylene shielding layer, the insulation layer is foamed polytetrafluoroethylene, the flame-retardant layer is a flame-retardant compound rubber mixture, and the wear-resistant sheath layer is a rubber flame-retardant cable material mixture.

[0018] A flame-retardant cable, wherein the flame-retardant compound rubber mixture comprises the following components: 40-50 parts of nitrile rubber, 34-36 parts of ethylene propylene rubber, 15-20 parts of mixed flame retardant, 6-8 parts of flame retardant synergist, 10-15 parts of calcined clay, 4-5 parts of paraffin wax, 0.5-1 part of stearic acid, 1-2 parts of vulcanizing agent, 2-4 parts of carbon black, and 1-2 parts of accelerator; the flame-retardant compound rubber mixture comprises the following components: 40-50 parts of nitrile rubber, 34-36 parts of ethylene propylene rubber, 15-20 parts of mixed flame retardant, 6-8 parts of flame retardant synergist, 10-15 parts of calcined clay, 4-5 parts of paraffin wax, 0.5-1 part of stearic acid, 1-2 parts of vulcanizing agent, 2-4 parts of carbon black, and 1-2 parts of accelerator.

[0019] Reference Figures 1-7The preparation equipment includes a support plate 1, a cable semi-finished product 2 is arranged on the top of the support plate 1, a twisting spool 5 is arranged on the outside of the cable semi-finished product 2, a connecting pipe 4 is arranged on the outside of the cable semi-finished product 2, the twisting spool 5 and the connecting pipe 4 are rotatably connected on the opposite side by a bearing, a fire-fighting buried module 8 is arranged on the twisting spool 5, and three circumferentially evenly distributed orifices are opened on the twisting spool 5. Polymer hoses 6 are slidably connected in each orifice, and the ends of the three polymer hoses 6 away from the twisting spool 5 are all wrapped around the outside of the cable semi-finished product 2. A wire-binding machine 7 is slidably connected to the outside of the three polymer hoses 6. The bottom of the wire-binding machine 7 is connected to the upper side of the support plate 1 by bolts. A drying module 9 is arranged on the side of the wire-binding machine 7 away from the twisting spool 5. The drying module 9 is located outside the cable semi-finished product 2. Fire protection installation module 8 includes a ring 801 and an outer sleeve 806; The drying module 9 includes a long sleeve 901.

[0020] Reference Figure 3 , Figure 4 and Figure 5In a preferred embodiment, a wire guide 3 is provided on the outside of the cable semi-finished product 2. The side of the wire guide 3 opposite to the connecting pipe 4 is bolted together. The bottom of the wire guide 3 is bolted together to the upper side of the support plate 1. The inner wall of the ring 801 is rotatably connected to the outside of the twisting disc 5 through a bearing. A toothed ring 805 is bolted together to the side of the twisting disc 5 near the wire guide 3. A base 802 is bolted together to the bottom of the ring 801. The bottom of the base 802 is bolted together to the upper side of the support plate 1. The base 802 has slots. A motor 803 is bolted into the slot. The output end of the motor 803 is connected to a gear 804 via a coupling. The gear 804 meshes with a gear ring 805. The inner wall of the outer sleeve 806 is bolted to the outside of the connecting pipe 4. Three circumferentially spaced notches are provided on the side of the outer sleeve 806 near the lead wire machine 3. Storage bottles 807 are bolted to the inner walls of each notch. Infusion tubes 808 are installed on the side of the storage bottles 807 away from the cable semi-finished product 2. Infusion tubes 808 are also installed on the side of the storage bottles 807 closest to the cable semi-finished product 2. The connecting pipe 4 is bolted with a nozzle 809. Each connecting pipe 4 has three circumferentially spaced circular openings. The inner walls of the three circular openings are bolted to the outer walls of the three nozzles 809. A pump 810 is bolted to the outer wall of each storage bottle 807. The output end of each pump 810 is connected to the storage bottle 807 on the same side via a conduit. Both the outer sleeve 806 and the connecting pipe 4 have circular grooves. A movable rod 811 is slidably connected within each groove. A bracket 812 is slidably connected to the outer wall of each movable rod 811. The bracket 812 is connected to the outer wall of the outer sleeve 806. The opposite sides are all connected by bolts. The outside of the movable rod 811 is surrounded by springs 813. One end of the springs 813 is connected to the outside of the movable rod 811 by bolts, and the other end is connected to the outside of the bracket 812 by bolts. The end of the movable rod 811 near the cable semi-finished product 2 is connected to an arc plate 814 by bolts. The side of the arc plate 814 near the cable semi-finished product 2 is connected to a scraper 815 by bolts. The outside of the scraper 815 is in contact with the outside of the cable semi-finished product 2. The positions of the three scrapers 815 are staggered.The cable semi-finished product 2 is provided with an annular seat 816 on its exterior. The annular seat 816 is bolted to the side of the twisting reel 5 away from the cable semi-finished product 2. The annular seat 816 has three circumferentially spaced slits. Each slit is rotatably connected to a rotating plate 817 via a bearing. The end of the rotating plate 817 away from the annular seat 816 is bolted to a glue storage box 818. On the side of the glue storage box 818 opposite to the cable semi-finished product 2, multiple equidistant spacers 820 are bolted to it. The side of the glue storage box 818 closest to the cable semi-finished product 2 has... The device has multiple equidistantly distributed fine holes 819. A conveying hose 823 is bolted to the side of the glue storage box 818 furthest from the cable semi-finished product 2. A glue storage tank 822 is bolted to the end of the conveying hose 823 furthest from the glue storage box 818. The side of the glue storage tank 822 opposite to the twisting disc 5 is bolted. Three circumferentially equidistant elastic springs 821 are bolted to the side of the twisting disc 5 near the annular seat 816. The ends of the elastic springs 821 furthest from the twisting disc 5 are bolted to the outside of the rotating plate 817 on the same side.

[0021] Specifically, the motor 803 is started, which drives the gear ring 805, which meshes with the gear 804, to rotate. This causes the twisting disc 5 to gradually wrap three polymer hoses 6 around the outside of the cable semi-finished product 2. The polymer hoses 6 contain oil-based dry powder fire extinguishing agent and pressurized carbon dioxide. During the process of transporting the cable semi-finished product 2 from the lead-in machine 3 to the cable-binding machine 7, the pump 810 is started. The pump 810 pumps water from the infusion tube 808 into the storage bottle 807 and into the nozzle 809, spraying it out to wet the surface of the cable semi-finished product 2. Under the elastic force of the spring 813, the movable rod 811 moves the arc-shaped... Plate 814 is pressed against the surface of cable semi-finished product 2, so that scraper 815 wipes away dirt from the surface of cable semi-finished product 2. Glue storage box 822 delivers stored glue to glue storage box 818 through delivery hose 823, so that glue can flow through fine holes 819 into the gaps between spacer strips 820. Under the elastic force of elastic spring 821, spacer strips 820 are pressed against the surface of cable semi-finished product 2, so that glue is applied to cable semi-finished product 2. With the bundling machine 7 bundling the three polymer hoses 6, the polymer hoses 6 are wound and pressed against the surface of cable semi-finished product 2 and bonded with glue.

[0022] In specific application scenarios, the fire-fighting installation module 8 is mainly suitable for the fire-fighting installation stage in the fire-fighting installation process. That is, the fire-fighting installation module 8 uses the scraper 815 and the glue storage box 818 to enable the equipment to pre-embed the polymer hose 6 in the cable during the cable preparation process. So when the cable encounters a fire and the outer sheath is damaged, the heat-damaged polymer hose 6 can use pressurized carbon dioxide to quickly spray out dry powder, thereby extinguishing the ignition point and achieving the function of protecting the cable. This greatly improves the safety of the cable and personnel and protects the cable's functionality.

[0023] Reference Figure 6 and Figure 7 In a preferred embodiment, a support frame 902 is bolted to the outside of the long sleeve 901. The support frame 902 is bolted to the side opposite to the cable bundling machine 7. The long sleeve 901 is located outside the cable semi-finished product 2. Three circumferentially equidistant rectangular slots 903 are provided on the long sleeve 901, and a fan 905 is installed in each of the rectangular slots 903. Three circumferentially equidistant stabilizing seats 906 are bolted to the outside of the long sleeve 901, and each stabilizing seat 906 is rotatably connected to a bearing. One end of lever arm 907 is bolted to the outside of fan 905 on the same side, and the other end is rotatably connected to lever arm 908 via bearing. The ends of the three lever arms 908 away from lever arm 907 are rotatably connected to the same integrated ring 909 via bearing. The inner wall of the integrated ring 909 is slidably connected to the outside of long sleeve 901, and the integrated ring 909 has a narrow opening with a fixing bolt 910 inside. The inner wall of the long sleeve 901 is bolted to a spiral guide ring 904.

[0024] Specifically, after the polymer hose 6 is wrapped and glued to the surface of the cable semi-finished product 2, as the cable semi-finished product 2 continues to move, the part of the cable semi-finished product 2 wrapped with the polymer hose 6 moves into the long sleeve 901. The blower 905 is started, and the blower 905 blows on the cable semi-finished product 2 and the polymer hose 6, thereby accelerating the drying of the glue. The fixing bolt 910 is loosened, and the fixing bolt 910 releases the lock on the integrated ring 909, pushing the integrated ring 909, so that the integrated ring 909 moves on the surface of the long sleeve 901, causing the second lever arm 908 to drive the first power arm 907 to rotate on the stable seat 906, thereby changing the blowing angle of the blower 905 on the cable semi-finished product 2.

[0025] In specific application scenarios, the drying module 9 is mainly suitable for the drying stage of the drying process. That is, the drying module 9 uses the spiral guide ring 904 and the fan 905 to greatly accelerate the drying speed of the glue on the cable semi-finished product 2, improve the adhesion of the polymer hose 6 to the cable semi-finished product 2, thereby avoiding the slippage of the polymer hose 6 wrapped on the cable semi-finished product 2 due to the glue not being dry, ensuring the stability of each structure in the cable, and improving the performance of the cable.

[0026] Working principle: The motor 803 is started, driving the gear ring 805, which meshes with the gear 804, to rotate. This causes the twisting disc 5 to gradually wrap three polymer hoses 6 around the outside of the cable semi-finished product 2. The polymer hoses 6 contain oil-based dry powder fire extinguishing agent and pressurized carbon dioxide. During the process of the cable semi-finished product 2 being transported from the lead-in machine 3 to the cable-binding machine 7, the pump 810 is started. The pump 810 pumps water from the infusion tube 808 into the storage bottle 807 and sprays it out through the nozzle 809, wetting the surface of the cable semi-finished product 2. Under the elastic force of the spring 813, the movable rod 811 presses the arc plate 814 tightly against the surface of the cable semi-finished product 2, causing the scraper 815 to wipe away dirt from the surface of the cable semi-finished product 2. The glue storage tank 822 transports the stored glue to the glue storage box 818 through the delivery hose 823, allowing the glue to flow through the fine holes 819 into the gaps between the spacers 820. The elastic spring 810... Under the elastic force of 21, the spacer strip 820 is tightly attached to the surface of the cable semi-finished product 2, thereby applying glue to the cable semi-finished product 2. As the cable bundling machine 7 bundles the three polymer hoses 6, the polymer hoses 6 are wrapped around and tightly attached to the surface of the cable semi-finished product 2 and bonded with glue. After the polymer hoses 6 are wrapped around and glued to the surface of the cable semi-finished product 2, as the cable semi-finished product 2 continues to move, the part of the cable semi-finished product 2 wrapped with the polymer hoses 6 moves into the long sleeve 901. The blower 905 is started, and the blower 905 blows on the cable semi-finished product 2 and the polymer hoses 6, thereby accelerating the drying of the glue. The fixing bolt 910 is loosened, and the fixing bolt 910 releases the lock on the integrated ring 909, pushing the integrated ring 909, causing the integrated ring 909 to move on the surface of the long sleeve 901, causing the lever arm 2 908 to drive the power arm 1 907 to rotate on the stable seat 906, thereby changing the blowing angle of the blower 905 on the cable semi-finished product 2.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for preparing flame-retardant cables, characterized in that, The preparation equipment includes a support plate (1), a cable semi-finished product (2) is arranged on the top of the support plate (1), a twisting spool (5) is arranged on the outside of the cable semi-finished product (2), a connecting pipe (4) is arranged on the outside of the cable semi-finished product (2), the twisting spool (5) is movably connected to the side opposite to the connecting pipe (4), a fire-fighting buried module (8) is arranged on the twisting spool (5), three circumferentially distributed holes are opened on the twisting spool (5), and a polymer hose (6) is slidably connected in each hole. The ends of the three polymer hoses (6) away from the twisting spool (5) are all wrapped around the outside of the cable semi-finished product (2), and a wire-binding machine (7) is slidably connected to the outside of the three polymer hoses (6). The bottom of the wire-binding machine (7) is fixedly connected to the upper side of the support plate (1), and a drying module (9) is arranged on the side of the wire-binding machine (7) away from the twisting spool (5). The drying module (9) is located outside the cable semi-finished product (2). The fire protection buried module (8) includes a ring (801) and an outer sleeve (806); The drying module (9) includes a long sleeve (901).

2. The equipment for preparing a flame-retardant cable according to claim 1, characterized in that, The cable semi-finished product (2) is provided with a wire guide machine (3) on the outside. The wire guide machine (3) is fixedly connected to the side opposite to the connecting pipe (4). The bottom of the wire guide machine (3) is fixedly connected to the upper side of the support plate (1). The inner wall of the ring (801) is movably connected to the outside of the twisting disc (5). The side of the twisting disc (5) close to the wire guide machine (3) is fixedly connected with a toothed ring (805). The bottom of the ring (801) is fixedly connected with a base (802). The bottom of the base (802) is fixedly connected to the upper side of the support plate (1). The base (802) has a slot. The motor (803) is fixedly connected in the slot. The output end of the motor (803) is connected to a gear (804) through a coupling. The gear (804) meshes with the toothed ring (805). The inner wall of the outer sleeve (806) is fixedly connected to the outside of the connecting pipe (4).

3. The equipment for preparing a flame-retardant cable according to claim 2, characterized in that, The outer sleeve (806) has three circumferentially equidistant notches on the side near the lead wire machine (3). Storage bottles (807) are fixedly connected to the inner walls of the notches. Infusion tubes (808) are provided on the side of the storage bottles (807) away from the cable semi-finished product (2). Spray nozzles (809) are fixedly connected to the side of the storage bottles (807) near the cable semi-finished product (2). Three circumferentially equidistant round openings are provided on the connecting pipe (4). The inner walls of the three round openings are fixedly connected to the outside of the three spray nozzles (809). A pump (810) is fixedly connected to the outside of the storage bottles (807). The output end of the pump (810) is connected to the storage bottles (807) on the same side through a conduit.

4. The equipment for preparing a flame-retardant cable according to claim 1, characterized in that, Both the outer sleeve (806) and the connecting pipe (4) are provided with circular grooves, and movable rods (811) are slidably connected in the circular grooves. Brackets (812) are slidably connected to the outside of the movable rods (811). The brackets (812) are fixedly connected to the outside of the outer sleeve (806). Springs (813) are wrapped around the outside of the movable rods (811). One end of the springs (813) is fixedly connected to the outside of the movable rods (811), and the other end is fixedly connected to the outside of the brackets (812). An arc plate (814) is fixedly connected to the end of the movable rods (811) near the cable semi-finished product (2). A scraper (815) is fixedly connected to the side of the arc plate (814) near the cable semi-finished product (2). The outside of the scrapers (815) is in contact with the outside of the cable semi-finished product (2). The positions of the three scrapers (815) are staggered.

5. The equipment for preparing a flame-retardant cable according to claim 1, characterized in that, The cable semi-finished product (2) is provided with an annular seat (816) on its outside. The annular seat (816) is fixedly connected to the side of the twisting reel (5) away from the cable semi-finished product (2). The annular seat (816) has three circumferentially distributed slits. A rotating plate (817) is movably connected to each slit. A glue storage box (818) is fixedly connected to the end of the rotating plate (817) away from the annular seat (816). A plurality of equidistantly distributed spacers (820) are fixedly connected to the side of the glue storage box (818) opposite to the cable semi-finished product (2). The side of the glue storage box (818) close to the cable semi-finished product (2) has Multiple equally spaced fine holes (819) are provided. A conveying hose (823) is fixedly connected to the side of the glue storage box (818) away from the cable semi-finished product (2). A glue storage box (822) is fixedly connected to the end of the conveying hose (823) away from the glue storage box (818). The glue storage box (822) is fixedly connected to the side opposite to the twisting disc (5). Three circumferentially equally spaced elastic springs (821) are fixedly connected to the side of the twisting disc (5) near the annular seat (816). The end of the elastic spring (821) away from the twisting disc (5) is fixedly connected to the outside of the rotating plate (817) on the same side.

6. The equipment for preparing a flame-retardant cable according to claim 1, characterized in that, The long sleeve (901) is fixedly connected to a support frame (902). The support frame (902) is fixedly connected to the side opposite to the cable bundler (7). The long sleeve (901) is located outside the cable semi-finished product (2). Three rectangular grooves (903) are equidistantly distributed around the long sleeve (901). Fans (905) are installed in each of the rectangular grooves (903). Three equidistantly distributed stabilizing seats (906) are fixedly connected to the outside of the long sleeve (901). A lever arm (907) is movably connected to each stabilizing seat (906). One end of the lever arm (907) is fixedly connected to the outside of the fan (905) on the same side, and the other end is movably connected to a lever arm (908).

7. The equipment for preparing a flame-retardant cable according to claim 6, characterized in that, The three lever arms 2 (908) are movably connected to the same integrated ring (909) at the ends away from lever arm 1 (907). The inner wall of the integrated ring (909) is slidably connected to the outside of the long sleeve (901), and a narrow opening is provided on the integrated ring (909). A fixing bolt (910) is provided in the narrow opening. A spiral guide ring (904) is fixedly connected to the inner wall of the long sleeve (901).

8. A flame-retardant cable obtained from the flame-retardant cable preparation equipment according to claim 1, characterized in that, The cable is centered on a conductive core and is sequentially covered from the inside out with a shielding layer, an insulation layer, a flame-retardant layer, an aluminum alloy tape armor layer, and a wear-resistant sheath layer. The conductive core is a copper core, the shielding layer is a polyethylene shielding layer, the insulation layer is foamed polytetrafluoroethylene, the flame-retardant layer is a flame-retardant compound rubber mixture, and the wear-resistant sheath layer is a rubber flame-retardant cable material mixture.

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