A safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in explosive environments

Abstract

The invention discloses a safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in an explosive environment, and relates to the technical field of cables. A hot-melt tube is filled with expanded graphite, and protective iron rings are sleeved on the outside of a wrapping tape at uniform intervals. Fixing holes are evenly spaced apart on the outside of the protective iron ring, and a connecting port is provided between two adjacent fixing holes. An arc frame is placed inside the connecting port, and a wave spring is embedded inside the fixing hole. Two ends of the arc frame are respectively connected to one end of an adjacent wave spring. The thermal insulation cotton, compression ribs, protective iron rings, arc springs, arc frames and elastic coils of the invention absorb and buffer external forces, thereby enhancing the compression and impact resistance of the cable. Aluminum hydroxide powder absorbs a large amount of heat and delays combustion. The expanded graphite inside the hot-melt tube expands when heated, and the expanded graphite diffuses into the gap between a shielding layer and a wrapping layer, thereby preventing flames from burning into the cable, thereby extending working time and reducing economic losses.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a safe, airtight, cold-resistant, low-smoke, flame-retardant control cable used in explosive environments. Background Art

[0002] The circuit generates a circuit or electric spark, but it is not enough to ignite the surrounding flammable and explosive gases. Such a circuit is an explosion-proof safety circuit, and the cable used is an explosion-proof cable, which is characterized by low capacitance, not easy to store charge, good shielding performance and anti-static performance. Compared with ordinary cables, explosion-proof cables have high temperature resistance, corrosion resistance and higher current carrying capacity than ordinary cables. The fire resistance, heat resistance and explosion-proof characteristics of explosion-proof cables can extend their service life in the event of a fire.

[0003] Explosion-proof cables are required to meet the high safety requirements of explosion-proof places, such as chemical enterprises, gas stations, gas stations, etc., which have extremely high safety requirements. The cable structure and explosion-proof performance requirements are very strict. The current explosion-proof cables have excellent shielding performance by strengthening the shielding layer, but the existing cables have low ability to withstand external impact, which makes the explosion-proof performance of the cables poor. In addition, when a fire occurs, the flame retardant ability of the cables is poor and cannot effectively prevent the spread of the fire. It is not suitable for communications in explosion-proof occasions. For this reason, we propose a safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in explosive environments to solve the above problems. Summary of the invention

[0004] The present invention provides a safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in an explosive environment, which can effectively solve the problem that the existing cables in the above-mentioned background technology have low ability to withstand external impacts, resulting in poor explosion-proof performance of the cables, and when a fire occurs, the cables have poor flame-retardant ability and cannot effectively prevent the spread of the fire, and cannot be well applied to communications in explosion-proof occasions.

[0005] To achieve the above object, the present invention provides the following technical solutions: A safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in an explosive environment, comprising a conductor, an insulating layer wrapped around the outside of the conductor, a flame-retardant, pressure-resistant component arranged outside the insulating layer, and the flame-retardant, pressure-resistant component comprising a hot-melt adhesive;

[0006] The conductor is provided with a plurality of conductors, the gaps formed between the plurality of conductors are filled with hot melt adhesive, the hot melt adhesive is wrapped with a wrapping layer on the outside, the wrapping layer is wrapped with a shielding layer on the outside, the shielding layer is wrapped with a wrapping tape on the outside, and the wrapping layer is evenly spaced with a plurality of placement grooves on the outside;

[0007] An expansion channel is provided between two adjacent placement grooves, a hot melt tube is placed inside the placement groove, and the hot melt tube is filled with expanded graphite;

[0008] The outer side of the wrapping belt is sleeved with protective iron rings at even intervals, the outer side of the protective iron ring is evenly spaced with fixing holes, a connecting port is opened between two adjacent fixing holes, an arc frame is placed inside the connecting port, a wave spring is embedded inside the fixing hole, and the two ends of the arc frame are respectively connected to one end of the adjacent wave spring;

[0009] An arc-shaped spring piece is welded on the top of the arc-shaped frame, and compression ribs are welded between two adjacent protective iron rings at even intervals.

[0010] According to the above technical solution, tightening grooves are evenly spaced apart on the outside of the wrapping layer near the placement groove, and tightening leather strips are connected between adjacent hot-melt tubes, and the tightening leather strips are embedded in adjacent tightening grooves.

[0011] According to the above technical solution, a limiting block is welded on the outer side of the protective iron ring corresponding to the bottom of the arc frame.

[0012] According to the above technical solution, elastic coils are welded at both ends of the arc-shaped spring pieces, and a limiting groove is provided between two adjacent arc-shaped spring pieces on the outer side of the protective iron ring, and the elastic coil is embedded in the adjacent limiting grooves.

[0013] According to the above technical solution, the longitudinal cross-section of the compression rib is elliptical, and bending openings are evenly spaced apart on the outer side of the compression rib.

[0014] According to the above technical solution, a cold-resistant and bend-resistant component is arranged on the outside of the hot melt adhesive, and the cold-resistant and bend-resistant component includes a braided tube;

[0015] A braided tube is embedded in the center of the hot melt adhesive, and a coil spring is embedded in the braided tube;

[0016] An insulation groove is provided on the outside of the wrapping layer between two adjacent expansion channels, a cloth bag is placed inside the insulation groove, and hollow glass microbeads are filled inside the cloth bag. Connecting ears are welded on both sides of the connecting port on the outside of the protective iron ring, and elastic ribs are connected between the connecting ears. Two hot-melt tubes are placed inside the compression ribs.

[0017] The interior of the second hot-melt tube is filled with a fire extinguishing agent, the outer side of the protective iron ring is wrapped with thermal insulation cotton, the outer side of the thermal insulation cotton is wrapped with an armor layer, and the outer side of the armor layer is wrapped with an outer sheath.

[0018] According to the above technical solution, a connecting tube is sleeved on the outer side of the elastic rib, and a transverse rib is connected between two adjacent connecting tubes.

[0019] According to the above technical solution, a partition cavity is provided inside the cloth bag, and the hollow glass microbeads are filled inside the partition cavity.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. It is equipped with flame-retardant and pressure-resistant components. When the cable is subjected to external pressure, the arc-shaped springs squeeze the arc-shaped frame, the wave springs squeeze and contract, and the arc-shaped frame undergoes elastic deformation to absorb and buffer the external pressure. At the same time, the arc-shaped springs also squeeze the elastic coils, and the elastic coils undergo elastic deformation to further absorb and buffer the external pressure, thereby enhancing the cable's ability to resist pressure and impact. Then, the protective iron rings and compression ribs undergo elastic deformation, further enhancing the cable's ability to resist pressure and impact. With the support of the armor layer, the damage to the conductor caused by external pressure is reduced, thereby improving the working stability of the cable.

[0022] When a fire occurs, the second hot-melt tube inside the compression rib melts, and the aluminum hydroxide powder inside the second hot-melt tube comes into contact with the flame. The aluminum hydroxide powder absorbs a large amount of heat, reduces the flame temperature, and delays combustion. At the same time, the aluminum hydroxide decomposes to generate aluminum oxide that can cover the surface of the tape on a large scale. The aluminum oxide separates the tape from the combustible gas, further delaying combustion. Then, the first hot-melt tube melts, and the expanded graphite inside the first hot-melt tube expands due to the heat. The expanded graphite diffuses into the gap between the shielding layer and the wrapping layer. The expanded graphite cooperates with the cloth bag to isolate the high temperature and prevent the flame from burning into the cable, avoiding the high temperature from being transmitted to the conductor and the insulation layer. In the event of a fire, the staff will have time to perform corresponding operations by controlling the cable to reduce economic losses. The hot-melt adhesive has aging resistance and electrical insulation properties. Its main component is polymer resin, which penetrates into the surface of the cable after being heated and melted to form a tough bonding layer, reducing cable failures and accidents caused by loosening and falling off, and ensuring the normal operation of the cable.

[0023] 2. A cold-resistant and bending-resistant component is provided. A connecting tube is sleeved on the outside of the elastic ribs. A transverse rib is connected between two adjacent connecting tubes. Both the elastic ribs and the transverse ribs are elastic rubber with good elasticity. The elastic ribs cooperate with the transverse ribs to enhance the cable's anti-bending ability. A braided tube is wrapped in the middle of the hot melt adhesive. The braided tube is woven from steel wire. A spiral spring is embedded inside the braided tube. The spiral spring cooperates with the elasticity of the compression ribs to further enhance the cable's anti-bending ability.

[0024] The inside of the cloth bag is filled with hollow glass beads. The cloth bag is high temperature resistant cloth with heat insulation ability. The hollow glass beads are tiny spheres with heat insulation properties. They can slow down the heat dissipation of the cable and have a thermal insulation effect. The hollow glass beads are evenly distributed inside the cloth bag to avoid accumulation of hollow glass beads, making the thermal insulation performance more stable. The cloth bag, hollow glass beads and thermal insulation cotton work together to further improve the cable's cold resistance.

[0025] To sum up, the thermal insulation cotton in the cold-resistant and bend-resistant components has thermal insulation ability. When the cable is subjected to external pressure, the thermal insulation cotton can also absorb the external pressure to a certain extent. Combined with the compression ribs, protective iron rings, arc-shaped springs, arc-shaped frames and elastic coils in the flame-retardant and pressure-resistant components to absorb and buffer external forces, the cable's compression and impact resistance are further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0027] In the attached picture:

[0028] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0029] Figure 2 is a cross-sectional view of a conductor of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the flame retardant and pressure resistant assembly of the present invention;

[0031] Figure 4 It is a schematic diagram of the installation structure of the compression rib of the present invention;

[0032] Figure 5 It is a schematic diagram of the installation structure of the arc frame of the present invention;

[0033] Figure 6 It is a schematic diagram of the installation structure of the arc-shaped spring piece of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the cold-resistant and bending-resistant component of the present invention;

[0035] Figure 8 It is a schematic diagram of the installation structure of the spiral spring of the present invention;

[0036] Fig. 9 The present invention comes from Figure 5 A magnified image of area A;

[0037] Fig.10 The present invention comes from Figure 4 A magnified view of area B;

[0038] Numbers in the figure: 1, conductor; 2, insulation layer;

[0039] 3. Flame retardant and pressure resistant components; 301. Hot melt adhesive; 302. Wrapping layer; 303. Shielding layer; 304. Wrapping tape; 305. Placement slot; 306. Tightening slot; 307. Expansion channel; 308. Hot melt tube; 309. Expanded graphite; 310. Tightening leather strip; 311. Protective iron ring; 312. Fixing hole; 313. Connecting port; 314. Arc frame; 315. Wave spring; 316. Limit block; 317. Arc spring; 318. Elastic roll; 319. Limit slot; 320. Compression rib; 321. Bending port;

[0040] 4. Cold-resistant and bend-resistant components; 401. Braided tube; 402. Coil spring; 403. Insulation tank; 404. Cloth bag; 405. Partition chamber; 406. Hollow glass microspheres; 407. Connecting ears; 408. Elastic ribs; 409. Connecting tube; 410. Transverse ribs; 411. Hot-melt second tube; 412. Fire extinguishing agent; 413. Insulation cotton; 414. Armor layer; 415. Outer sheath. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0042] Example: Figure 1-10 As shown, the present invention provides a technical solution for a safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in an explosive environment, comprising a conductor 1, an insulating layer 2 wrapped around the outside of the conductor 1, a flame-retardant and pressure-resistant component 3 arranged on the outside of the insulating layer 2, and the flame-retardant and pressure-resistant component 3 comprising a hot melt adhesive 301, a wrapping layer 302, a shielding layer 303, a wrapping tape 304, a placement groove 305, a tightening groove 306, an expansion channel 307, a hot melt tube 308, expanded graphite 309, a tightening leather strip 310, a protective iron ring 311, a fixing hole 312, a connecting port 313, an arc frame 314, a wave spring 315, a limit block 316, an arc spring 317, an elastic roll 318, a limit groove 319, a compression rib 320 and a bending port 321;

[0043] The outer side of the insulating layer 2 is wrapped with a wrapping layer 302, a plurality of conductors 1 are provided, and the gaps formed between the plurality of conductors 1 are filled with hot melt adhesive 301, the outer side of the hot melt adhesive 301 is wrapped with a wrapping layer 302, the outer side of the wrapping layer 302 is wrapped with a shielding layer 303, the outer side of the shielding layer 303 is wrapped with a wrapping tape 304, the wrapping tape 304 is a flame retardant wrapping tape 304, which can effectively slow down the spread of fire in a fire, a plurality of placement grooves 305 are evenly spaced apart on the outer side of the wrapping layer 302, an expansion channel 307 is provided between two adjacent placement grooves 305, a hot melt tube 308 is placed inside the placement groove 305, and the hot melt tube 308 The inside is filled with expanded graphite 309, and tightening grooves 306 are evenly spaced at the outer side of the wrapping layer 302 near the placement groove 305. Tightening strips 310 are connected between adjacent hot-melt tubes 308. The tightening strips 310 are embedded in the adjacent tightening grooves 306. The tightening strips 310 can connect the hot-melt tubes 308, so as to fix the hot-melt tubes 308 in the placement groove 305. The hot-melt tube 308 and the hot-melt second tube 411 are both made of high-temperature resistant TPU material with a melting point between 180°C and 220°C, and have excellent high tension, high tensile force, strong toughness and aging resistance.

[0044] The outer side of the wrapping belt 304 is evenly spaced with protective iron rings 311, and fixing holes 312 are evenly spaced on the outer side of the protective iron ring 311. A connecting port 313 is opened between two adjacent fixing holes 312, and an arc frame 314 is placed inside the connecting port 313. A wave spring 315 is embedded inside the fixing hole 312. The two ends of the arc frame 314 are respectively connected to one end of the adjacent wave spring 315. A limiting block 316 is welded to the bottom of the arc frame 314 on the outer side of the protective iron ring 311. The limiting block 316 can limit the deformation of the arc frame 314. When the arc frame 314 is bent by external force, the limiting block 316 plays a supporting role to prevent the arc frame 314 from being unable to rebound due to excessive deformation of the arc frame 314. An arc-shaped spring piece 317 is welded on the top of the arc-shaped frame 314, and elastic rolls 318 are welded at both ends of the arc-shaped spring piece 317. A limiting groove 319 is provided between two adjacent arc-shaped spring pieces 317 on the outside of the protective iron ring 311, and the elastic roll 318 is embedded in the adjacent limiting groove 319. When the arc-shaped spring piece 317 is subjected to external pressure, the elastic roll 318 undergoes elastic deformation to absorb and buffer the pressure. Compression ribs 320 are welded evenly at intervals between two adjacent protective iron rings 311. The longitudinal section of the compression ribs 320 is elliptical. The compression ribs 320 are elastic and can buffer the pressure. Bending openings 321 are evenly spaced outside the compression ribs 320, and the bending openings 321 can provide space for the bending of the compression ribs 320.

[0045] A cold-resistant and bend-resistant component 4 is arranged outside the hot melt adhesive 301, and the cold-resistant and bend-resistant component 4 includes a braided tube 401, a coil spring 402, a heat preservation groove 403, a cloth bag 404, a partition cavity 405, a hollow glass microsphere 406, a connecting ear 407, an elastic rib 408, a connecting tube 409, a transverse rib 410, a hot melt second tube 411, a fire extinguishing agent 412, a heat preservation cotton 413, an armor layer 414 and an outer sheath 415;

[0046] A braided tube 401 is embedded in the center of the hot melt adhesive 301. The elasticity of the spiral spring 402 can further enhance the bending resistance of the cable. An insulation groove 403 is provided between two adjacent expansion channels 307 on the outside of the wrapping layer 302. A cloth bag 404 is placed inside the insulation groove 403. The cloth bag 404 is a high temperature resistant cloth that can be used for a long time in a wide temperature range of -60°C to +300°C. The cloth bag 404 is filled with hollow glass microbeads 406. The hollow glass microbeads 406 are tiny spheres with heat insulation properties, which can slow down the diffusion of cable heat and have a heat preservation effect. A separation cavity 405 is provided inside the cloth bag 404. The hollow glass microbeads 406 are filled inside the separation cavity 405. The separation cavity 405 can evenly distribute the hollow glass microbeads 406 inside the cloth bag 404 to avoid the accumulation of the hollow glass microbeads 406, so that the heat preservation performance is more stable.

[0047] Connecting ears 407 are welded on both sides of the connecting port 313 on the outside of the protective iron ring 311, and elastic ribs 408 are connected between the connecting ears 407. A connecting tube 409 is sleeved on the outside of the elastic ribs 408, and a transverse rib 410 is connected between two adjacent connecting tubes 409. The elastic ribs 408 and the transverse ribs 410 are elastic rubbers with good elasticity. The elastic ribs 408 cooperate with the transverse ribs 410 to enhance the bending resistance of the cable. A braided tube 401 is wrapped in the middle of the hot melt adhesive 301. The braided tube 401 is woven from steel wire. A coil spring 402 is embedded in the braided tube 401. The elasticity of the coil spring 402 can further enhance the bending resistance and compression resistance of the cable. Two hot-melt tubes 411 are placed inside the rib 320. The inside of the two hot-melt tubes 411 is filled with a fire extinguishing agent 412. The fire extinguishing agent 412 is aluminum hydroxide powder. When the cable burns, the aluminum hydroxide powder can absorb a large amount of heat, reduce the flame temperature, and delay combustion. At the same time, aluminum hydroxide decomposes to generate aluminum oxide that covers the surface of the material, isolating the contact between oxygen and combustible substances and preventing the combustion reaction from proceeding. The outside of the protective iron ring 311 is wrapped with thermal insulation cotton 413, and the outside of the thermal insulation cotton 413 is wrapped with an armor layer 414. The outside of the armor layer 414 is wrapped with an outer sheath 415. The outer sheath 415 is made of halogen-free rubber. The thermal insulation cotton 413 is low-smoke thermal insulation cotton 413, and the amount of smoke generated during combustion is small.

[0048] The working principle and use process of the present invention are as follows: when the cable is subjected to external pressure, the armor layer 414 is deformed to initially buffer the external pressure. When the external pressure acts on the arc-shaped spring piece 317, the arc-shaped spring piece 317 squeezes the arc-shaped frame 314. Under the limiting action of the fixing hole 312, the wave spring 315 is squeezed and contracted, and the arc-shaped frame 314 is elastically deformed to absorb and buffer the external pressure, thereby reducing the damage of the external pressure to the conductor 1. At the same time, the arc-shaped spring piece 317 also squeezes the elastic roll 318, and the elastic roll 318 is elastically deformed to further absorb and buffer the external pressure, thereby enhancing the cable's ability to resist pressure and impact. Then, the protective iron ring 311 and the compression rib 320 are elastically deformed to further enhance the cable's ability to resist pressure and impact. When the cable is subjected to external pressure, the conductor 1 can be well protected, thereby improving the working stability of the cable.

[0049] A connecting tube 409 is sleeved on the outside of the elastic rib 408, and a transverse rib 410 is connected between two adjacent connecting tubes 409. The elastic rib 408 and the transverse rib 410 are both elastic rubbers with good elasticity. The elastic rib 408 cooperates with the transverse rib 410 to enhance the bending resistance of the cable. A braided tube 401 is wrapped in the middle of the hot melt adhesive 301. The braided tube 401 is woven from steel wires. A coil spring 402 is embedded in the braided tube 401. The elasticity of the coil spring 402 cooperates with the compression rib 320 to further enhance the bending resistance of the cable.

[0050] When a fire occurs, the hot melt tube 411 inside the compression rib 320 melts, and the fire extinguishing agent 412 inside the hot melt tube 411 contacts the flame. The fire extinguishing agent 412 is aluminum hydroxide powder. The aluminum hydroxide powder absorbs a large amount of heat, reduces the flame temperature, and delays combustion. At the same time, the aluminum hydroxide decomposes to generate aluminum oxide that can cover the surface of the wrapping tape 304 in a large range. The aluminum oxide separates the wrapping tape 304 from the combustible gas, greatly reducing the contact between the flame and the wrapping tape 304, and further delays combustion. Then, the hot melt tube 308 melts, and the expanded graphite 309 inside the hot melt tube 308 expands due to the heat. The expanded graphite diffuses into the tightening groove 306 and the expansion channel 307. At the same time, the expanded graphite also Diffusion to the gap between the shielding layer 303 and the wrapping layer 302, the cloth bag 404 is a high temperature resistant cloth, the expanded graphite and the cloth bag 404 can isolate the high temperature and prevent the flame from burning into the cable, avoiding the high temperature from being transmitted to the conductor 1 and the insulating layer 2, extending the working time, and in the event of a fire, the staff can have time to perform corresponding operations by controlling the cable, reducing economic losses, the hot melt adhesive 301 has aging resistance and electrical insulation properties, and the main component is polymer resin, which is melted by heating and penetrated into the surface of the cable to form a tough bonding layer, so that the cable materials are firmly combined together, reducing the failures and accidents caused by loosening and falling of the cable, and ensuring the normal operation of the cable;

[0051] In a cold environment, the cable cloth bag 404 is filled with hollow glass beads 406. The hollow glass beads 406 are tiny spheres with heat-insulating properties. They can slow down the heat dissipation of the cable and have a heat-insulating effect. The hollow glass beads 406 are evenly distributed inside the cloth bag 404 to avoid accumulation of the hollow glass beads 406, making the heat-insulating performance more stable. At the same time, the thermal insulation cotton 413 has heat-insulating ability, which further reduces heat dissipation. When the cable is subjected to external pressure, the thermal insulation cotton 413 can also absorb the external pressure to a certain extent. Together with the compression ribs 320, protective iron rings 311, arc-shaped spring pieces 317, arc-shaped frames 314 and elastic rolls 318 in the flame-retardant and pressure-resistant component 3, the absorption and buffering of external forces further improve the pressure and impact resistance.

[0052] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in explosive environments, comprising a conductor (1), characterized in that: The conductor (1) is wrapped with an insulating layer (2) on the outside, a flame retardant and pressure resistant component (3) is arranged on the outside of the insulating layer (2), and the flame retardant and pressure resistant component (3) comprises a hot melt adhesive (301); The conductor (1) is provided in plurality, the gaps formed between the plurality of conductors (1) are filled with hot melt adhesive (301), the hot melt adhesive (301) is wrapped with a wrapping layer (302) on the outside, the wrapping layer (302) is wrapped with a shielding layer (303) on the outside, the shielding layer (303) is wrapped with a wrapping tape (304) on the outside, and the wrapping layer (302) is provided with a plurality of placement grooves (305) evenly spaced apart on the outside; An expansion channel (307) is provided between two adjacent placement grooves (305), a hot melt tube (308) is placed inside the placement groove (305), and the hot melt tube (308) is filled with expanded graphite (309); The outer side of the wrapping belt (304) is sleeved with protective iron rings (311) at even intervals, the outer side of the protective iron ring (311) is provided with fixing holes (312) at even intervals, a connecting port (313) is provided between two adjacent fixing holes (312), an arc frame (314) is placed inside the connecting port (313), a wave spring (315) is embedded inside the fixing hole (312), and two ends of the arc frame (314) are respectively connected to one end of an adjacent wave spring (315); An arc-shaped spring sheet (317) is welded to the top of the arc-shaped frame (314), and compression ribs (320) are welded between two adjacent protective iron rings (311) at even intervals.

2. The safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in an explosive environment according to claim 1, characterized in that: Tightening grooves (306) are evenly spaced apart on the outside of the wrapping layer (302) near the placement groove (305), and tightening strips (310) are connected between adjacent hot-melt tubes (308), and the tightening strips (310) are embedded in adjacent tightening grooves (306).

3. The safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in an explosive environment according to claim 1, characterized in that: A limiting block (316) is welded to the bottom of the arc frame (314) on the outer side of the protective iron ring (311).

4. The safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in an explosive environment according to claim 1, characterized in that: Elastic rolls (318) are welded to both ends of the arc-shaped spring pieces (317), and a limiting groove (319) is provided between two adjacent arc-shaped spring pieces (317) on the outer side of the protective iron ring (311), and the elastic rolls (318) are embedded in the adjacent limiting grooves (319).

5. The safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in an explosive environment according to claim 1, characterized in that: The longitudinal cross-section of the compression rib (320) is elliptical, and bending openings (321) are evenly spaced apart on the outside of the compression rib (320).

6. The safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in an explosive environment according to claim 1, characterized in that: A cold-resistant and bend-resistant component (4) is arranged outside the hot melt adhesive (301), and the cold-resistant and bend-resistant component (4) comprises a braided tube (401); A braided tube (401) is embedded in the center of the hot melt adhesive (301), and a coil spring (402) is embedded inside the braided tube (401); An insulation groove (403) is provided on the outside of the wrapping layer (302) between two adjacent expansion channels (307), a cloth bag (404) is placed inside the insulation groove (403), and hollow glass microbeads (406) are filled inside the cloth bag (404), connecting ears (407) are welded on both sides of the connecting opening (313) on the outside of the protective iron ring (311), elastic ribs (408) are connected between a plurality of the connecting ears (407), and two hot-melt tubes (411) are placed inside the compression rib (320); The interior of the second hot-melt tube (411) is filled with a fire extinguishing agent (412), the outer side of the protective iron ring (311) is wrapped with thermal insulation cotton (413), the outer side of the thermal insulation cotton (413) is wrapped with an armor layer (414), and the outer side of the armor layer (414) is wrapped with an outer sheath (415).

7. The safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in an explosive environment according to claim 6, characterized in that: A connecting tube (409) is sleeved on the outside of the elastic rib (408), and a transverse rib (410) is connected between two adjacent connecting tubes (409).

8. The safe, airtight, cold-resistant, low-smoke, flame-retardant control cable for use in an explosive environment according to claim 6, characterized in that: A partition cavity (405) is provided inside the cloth bag (404), and the hollow glass microbeads (406) are filled inside the partition cavity (405).

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