Anti-interference flame-retardant cable

Abstract

The anti-interference flame-retardant cable comprises two wire cores, two reinforcing ropes, a supporting frame, an inner shielding layer, a filling layer, an inner insulating layer, an outer shielding layer, a flame-retardant layer and an outer insulating layer, the two wire cores and the two reinforcing ropes are arranged in a pairwise staggered mode around the supporting frame, and the supporting frame comprises a fiber pipe and a sleeve. A plurality of supporting rods are arranged on the pipe wall of the sleeve, buckles are arranged at the ends of the supporting rods, the two wire cores and the two reinforcing ropes can be clamped in clamping grooves of the buckles, and the sleeve, the supporting rods and the buckles are of an integrally-formed fusible structure. The inner shielding layer is of a copper wire mesh structure woven on the peripheries of the two wire cores and the two reinforcing ropes. The invention discloses an anti-interference flame-retardant cable, and belongs to the technical field of cables.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and more particularly to an anti-interference flame-retardant cable. Background Art

[0002] A cable is made of one or more mutually insulated conductors and an outer insulating protective layer. It is a wire that transmits electricity or information from one place to another. Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. The cables in the prior art have a single structure, a relatively single function, poor flame retardancy, resulting in low safety, and poor impact resistance, and are easily broken due to impact or strong tension.

[0003] With the continuous progress of science and technology, the productivity in the world has also been greatly improved. The improvement of productivity is inseparable from the emergence of high-power electrical appliances, and the use of these high-power electrical appliances has certain safety hazards. Therefore, in the manufacturing process of wires and cables, it is necessary to increase its safety protection measures to reduce the probability of fire. When adding fire prevention function to the manufacturing process of wires and cables, it is mainly considered to add flame retardant materials to the manufacturing materials. And the research on flame retardant materials has begun since the last century. In the flame retardant materials of the last century, a certain amount of halogen-containing flame retardant was added. Although this material has a certain flame retardant effect, once it burns, it will produce a large amount of harmful gases, which has serious harm to the human body. The smoke generated by the combustion of this kind of halogen-containing material not only has harmful effects such as thermal damage, poisoning, and suffocation, but also reduces the harm of light at the fire scene, thereby seriously affecting the escape time and causing secondary damage.

[0004] Moreover, with the development of multiple fields and industries, the use of cables has become more and more extensive, but it has also brought new problems. For example, high-voltage power transmission and some special working environments will form a strong internal electric field or external electromagnetic field, causing mutual interference between the internal and external electromagnetic fields, affecting the power transmission and electrical signal transmission process. In this regard, the research and development of anti-interference cables has become a key direction in recent years. At present, in order to improve the anti-interference ability of cables, built-in conductors are generally used, and the secondary electric field formed by the conductor after being subjected to a strong electric field is used as an electromagnetic shield. However, the electromagnetic shielding of this form of cable has a lag, and it is difficult to cope with excessively strong electric fields and form a good shielding effect. It is also accompanied by the risk of electrical breakdown. Summary of the invention

[0005] In view of some of the above deficiencies, an object of the present invention is to provide an anti-interference flame-retardant cable.

[0006] To achieve the above-mentioned objectives, the present invention provides an anti-interference flame-retardant cable, comprising two wire cores, two reinforcing ropes, a support frame, an inner shielding layer, a filling layer, an inner insulating layer, an outer shielding layer, a flame-retardant layer and an outer insulating layer, the two wire cores and the two reinforcing ropes are arranged in pairs around the support frame, the support frame comprises a fiber tube and a sleeve, a plurality of support rods are provided on the tube wall of the sleeve, a buckle is provided at the end of the support rod, the two wire cores and the two reinforcing ropes can be clamped in the clamping groove of the buckle, the sleeve, the support rod and the buckle are an integrally formed fusible structure, and the inner shielding layer is a copper wire mesh structure woven around the two wire cores and the two reinforcing ropes.

[0007] Preferably, the filling layer wraps the two wire cores, the two reinforcing ropes, the support frame and the inner shielding layer.

[0008] Preferably, the filling layer is composed of the following raw materials in parts by weight: 1-2 parts of mesoporous quartz powder, 1-5 parts of lead-free stabilizer, 5-8 parts of antioxidant, 10-15 parts of epoxy resin glue, 1-4 parts of acetylated monoglyceride, 2-4 parts of dioctyl terephthalate, 3-8 parts of hydrogenated rosin glycerol, 2-4 parts of polyisocyanate, 2-7 parts of polytetrafluoroethylene, 4-7 parts of compatibilizer, 3-6 parts of inorganic flame retardant, 5-8 parts of acrylic glue and 5-9 parts of alumina powder.

[0009] Preferably, the flame retardant layer is a halogen-free structure composed of TPE resin, glass fiber, stearic acid, modified filler, carbon black, methyltrimethoxysilane, high-density polyethylene, inorganic flame retardant, epoxy acrylate, polyvinyl alcohol, zinc oxide, light carbonic acid and lubricant.

[0010] Preferably, the outer insulating layer is composed of the following raw materials in parts by weight: 40-48 parts of resin, 10-15 parts of chlorinated rubber, 7-13 parts of barium sulfate powder, 8-16 parts of carbon powder, 20-30 parts of nano-grade hard clay, 2-5 parts of propylene glycol hydrogenated succinate, 0.5-1.5 parts of iodopropynyl butyl carbamate, 10-15 parts of stabilizer, 50-58 parts of plasticizer, 12-20 parts of silicon hydroxide, 10-13 parts of filler, 6-17 parts of calcium carbonate, 5-15 parts of aluminum oxide, 2-5 parts of dispersant, and 1-4 parts of anti-hydrolysis agent.

[0011] Preferably, the sleeve, the support rod and the buckle are made of ethylene-vinyl acetate copolymer.

[0012] Preferably, the sleeve is interference fit with the fiber tube, an axially extending limiting groove is provided on the outer wall of the fiber tube, and a limiting protrusion matching the limiting groove is protruded from the inner wall of the sleeve.

[0013] Preferably, before weaving the copper wire mesh structure around the two wire cores and the two reinforcement ropes, a positioning mold for positioning the two wire cores, the two reinforcement ropes and the support frame is arranged in front of the braiding machine. After the positioning mold positions the two wire cores, the two reinforcement ropes and the support frame, the positioning mold includes a round tube and two axial slide grooves arranged on the inner wall of the round tube, the axial slide groove is an arc groove structure, and the two wire cores and the two reinforcement ropes are adapted to the axial slide groove.

[0014] Preferably, the outer shielding layer is a shielding mesh woven from tinned copper wires wrapped around the outside of the flame retardant layer. The shielding mesh is combined with a composite filler and bonded to the flame retardant layer. The composite filler is composed of piezoelectric ceramic particles, alumina particles and expandable graphite.

[0015] Compared with the existing technology, the present invention has the following beneficial effects:

[0016] (1) The anti-interference flame-retardant cable of the present invention is provided with an inner shielding layer to surround the wire core and the reinforcing rope, and then the filling layer is extruded by an extruder. The inner shielding layer is combined with the outer shielding layer to form a double-layer shielding magnetic field and electric field protective barrier, which effectively reduces the influence of the external electric field on the wire core and effectively avoids the risk of electrical breakdown;

[0017] (2) The anti-interference flame-retardant cable of the present invention has two reinforcing ropes arranged inside the filling layer and between the two wire cores. The wire core and the reinforcing rope are formed into a whole by a supporting frame. The reinforcing rope is a tensile fiber structure, which can improve the tensile strength of the cable, improve the overall strength of the cable, and improve the service life;

[0018] (3) The anti-interference flame-retardant cable of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0020] Figure 1 It is a schematic structural diagram of the anti-interference flame-retardant cable of the present invention;

[0021] Figure 2 It is a structural stereogram of the combination of the center line core, the reinforcing rope, the supporting frame and the positioning mold of the present invention;

[0022] Figure 3 It is an enlarged stereoscopic diagram of the structure of the support frame in the present invention;

[0023] Figure 4 It is an enlarged stereoscopic diagram of the structure of the sleeve, support rod and buckle assembly in the present invention;

[0024] Figure 5 It is an enlarged stereoscopic view of the structure of the positioning mold in the present invention.

[0025] Among them: 1-wire core, 2-reinforcement rope, 3-support frame, 4-inner shielding layer, 5-filling layer, 6-inner insulation layer, 7-outer shielding layer, 8-flame retardant layer, 9-outer insulation layer, 10-fiber tube, 11-sleeve, 12-support rod, 13-buckle, 14-limiting groove, 15-limiting protrusion, 16-positioning mold, 17-round tube, 18-axial slide groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The embodiments of the present invention are described below based on the overall structure of the present invention.

[0027] The specific implementation of the present invention is as follows:

[0028] like Figure 1-Figure 5 As shown, an anti-interference flame-retardant cable includes two cores 1, two reinforcement ropes 2, a support frame 3, an inner shielding layer 4, a filling layer 5, an inner insulating layer 6, an outer shielding layer 7, a flame-retardant layer 8 and an outer insulating layer 9. The two cores 1 and the two reinforcement ropes 2 are staggered in pairs around the support frame 3. The support frame 3 includes a fiber tube 10 and a sleeve 11. A plurality of support rods 12 are provided on the tube wall of the sleeve 11. A buckle 13 is provided at the end of the support rod 12. The two cores 1 and the two reinforcement ropes 2 can be clamped in the clamping groove of the buckle 13. The clamping groove is a circular arc groove with an arc greater than 180°. The sleeve 11, the support rod 12 and the buckle 13 are an integrally formed fusible structure. The inner shielding layer 4 is a copper wire mesh structure woven around the two cores 1 and the two reinforcement ropes 2.

[0029] In the anti-interference flame-retardant cable of the present invention, an inner shielding layer 4 is provided to surround the core 1 and the reinforcing rope 2, and then the filling layer 5 is extruded by an extruder. The inner shielding layer 4 is combined with the outer shielding layer 7 to form a double-layer shielding magnetic field and electric field protective barrier, which effectively reduces the influence of the external electric field on the core 1 and effectively avoids the risk of electrical breakdown.

[0030] In the anti-interference flame-retardant cable of the present invention, two reinforcing ropes 2 are arranged inside the filling layer 5 and arranged between the two cores 1. The core 1 and the reinforcing ropes 2 are formed into a whole through the support frame 3. The reinforcing rope 2 is a tensile fiber structure, which can improve the tensile resistance of the cable, improve the overall strength of the cable, and improve the service life.

[0031] A preferred implementation of this embodiment is that the filling layer 5 wraps the two wire cores 1, the two reinforcement ropes 2, the support frame 3 and the inner shielding layer 4.

[0032] A preferred implementation of this embodiment is that the filling layer 5 is composed of the following raw materials in parts by weight: 1-2 parts of mesoporous quartz powder, 1-5 parts of lead-free stabilizer, 5-8 parts of antioxidant, 10-15 parts of epoxy resin glue, 1-4 parts of acetylated monoglyceride, 2-4 parts of dioctyl terephthalate, 3-8 parts of hydrogenated rosin glycerol, 2-4 parts of polyisocyanate, 2-7 parts of polytetrafluoroethylene, 4-7 parts of compatibilizer, 3-6 parts of inorganic flame retardant, 5-8 parts of acrylic glue and 5-9 parts of alumina powder. The filling layer 5 in this embodiment has the effects of flame retardancy and compression resistance, reduces the influence of external impact on the wire core 1, and protects the wire core 1.

[0033] A preferred implementation of this embodiment is that the outer shielding layer 7 is a shielding net woven from tinned copper wire wrapped outside the flame retardant layer 8, and the shielding net is bonded to the flame retardant layer 8 after being combined with a composite filler, and the composite filler is composed of piezoelectric ceramic particles, aluminum oxide particles and expandable graphite. When receiving an external lightning attack, the expandable graphite can expand and squeeze the piezoelectric ceramic to spontaneously form static charges to form disordered static electricity, and the disordered static electricity forms an electromagnetic shielding effect. At the same time, its conductivity is poor and it is not easily affected by the external electric field and fails, and the risk of electrical breakdown is effectively avoided. At the same time, the external electric field can be conducted to other parts through the shielding net to prevent the excessive heat generated from causing the temperature of the cable sheath to rise. The shielding net also plays the role of shielding the electric field and reinforcing the cable.

[0034] A preferred implementation manner of this embodiment is that the flame retardant layer 8 is a halogen-free structure composed of TPE resin, glass fiber, stearic acid, modified filler, carbon black, methyltrimethoxysilane, high-density polyethylene, inorganic flame retardant, epoxy acrylate, polyvinyl alcohol, zinc oxide, light carbonic acid and lubricant.

[0035] A preferred implementation manner of the present embodiment is that the outer insulating layer 9 is composed of the following raw materials in parts by weight: 40-48 parts of resin, 10-15 parts of chlorinated rubber, 7-13 parts of barium sulfate powder, 8-16 parts of carbon powder, 20-30 parts of nano-grade hard clay, 2-5 parts of propylene glycol hydrogenated succinate, 0.5-1.5 parts of iodopropynyl butyl carbamate, 10-15 parts of stabilizer, 50-58 parts of plasticizer, 12-20 parts of silicon hydroxide, 10-13 parts of filler, 6-17 parts of calcium carbonate, 5-15 parts of aluminum oxide, 2-5 parts of dispersant, and 1-4 parts of anti-hydrolysis agent.

[0036] A preferred implementation of this embodiment is that the sleeve 11, the support rod 12 and the buckle 13 are ethylene-vinyl acetate copolymer.

[0037] A preferred implementation of this embodiment is that the sleeve 11 is interference fit with the fiber tube 10, an axially extending limiting groove 14 is provided on the outer wall of the fiber tube 10, and a limiting protrusion 15 matching the limiting groove 14 is protruded on the inner wall of the sleeve 11.

[0038] A preferred implementation of this embodiment is that before the copper wire mesh structure is braided around the two cores 1 and the two reinforcing ropes 2, a positioning mold 16 for positioning the two cores 1, the two reinforcing ropes 2 and the support frame 3 is arranged in front of the braiding machine. After the positioning mold 16 positions the two cores 1, the two reinforcing ropes 2 and the support frame 3, the positioning mold 16 includes a round tube 17 and two axial slide grooves 18 arranged on the inner wall of the round tube 17. The axial slide grooves 18 are arc-shaped groove structures, and the two cores 1 and the two reinforcing ropes 2 are adapted to the axial slide grooves 18. The positioning mold 16 is used to position the two cores 1, the two reinforcing ropes 2 and the support frame 3, so that the integral structure composed of the two cores 1, the two reinforcing ropes 2 and the support frame 3 is not easily deformed when entering the filling layer 5 extruder for extrusion processing, and it is also convenient for braiding the copper wire mesh of the inner shielding layer 4.

[0039] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is only an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed without departing from the principles and purpose of the present invention after reading this specification, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An anti-interference flame-retardant cable, characterized in that: The invention comprises two wire cores (1), two reinforcing ropes (2), a support frame (3), an inner shielding layer (4), a filling layer (5), an inner insulating layer (6), a flame retardant layer (8), an outer shielding layer (7) and an outer insulating layer (9); the two wire cores (1) and the two reinforcing ropes (2) are arranged in pairs around the support frame (3); the support frame (3) comprises a fiber tube (10) and a sleeve (11); a plurality of support rods (12) are arranged on the tube wall of the sleeve (11); a buckle (13) is provided at the end of the support rod (12); the two wire cores (1) and the two reinforcing ropes (2) can be snapped into the slot of the buckle (13); the sleeve (11), the support rod (12) and the buckle (13) are an integrally formed fusible structure; the inner shielding layer (4) is a copper wire mesh structure woven around the two wire cores (1) and the two reinforcing ropes (2).

2. The anti-interference flame-retardant cable according to claim 1, characterized in that: The filling layer (5) is arranged to wrap the two wire cores (1), the two reinforcing ropes (2), the support frame (3) and the inner shielding layer (4).

3. The anti-interference flame-retardant cable according to claim 2, characterized in that: The filling layer (5) is composed of the following raw materials in parts by weight: 1-2 parts of mesoporous quartz powder, 1-5 parts of lead-free stabilizer, 5-8 parts of antioxidant, 10-15 parts of epoxy resin glue, 1-4 parts of acetylated monoglyceride, 2-4 parts of dioctyl terephthalate, 3-8 parts of hydrogenated rosin glycerol, 2-4 parts of polyisocyanate, 2-7 parts of polytetrafluoroethylene, 4-7 parts of compatibilizer, 3-6 parts of inorganic flame retardant, 5-8 parts of acrylic glue and 5-9 parts of aluminum oxide powder.

4. The anti-interference flame-retardant cable according to claim 3, characterized in that: The flame retardant layer (8) is a halogen-free structure composed of TPE resin, glass fiber, stearic acid, modified filler, carbon black, methyltrimethoxysilane, high-density polyethylene, inorganic flame retardant, epoxy acrylate, polyvinyl alcohol, zinc oxide, light carbonic acid and lubricant.

5. The anti-interference flame-retardant cable according to claim 4, characterized in that: The outer insulating layer (9) is composed of the following raw materials in parts by weight: 40-48 parts of resin, 10-15 parts of chlorinated rubber, 7-13 parts of barium sulfate powder, 8-16 parts of carbon powder, 20-30 parts of nano-grade hard clay, 2-5 parts of propylene glycol hydrogenated succinate, 0.5-1.5 parts of iodopropynyl butyl carbamate, 10-15 parts of stabilizer, 50-58 parts of plasticizer, 12-20 parts of silicon hydroxide, 10-13 parts of filler, 6-17 parts of calcium carbonate, 5-15 parts of aluminum oxide, 2-5 parts of dispersant, and 1-4 parts of anti-hydrolysis agent.

6. The anti-interference flame-retardant cable according to claim 1, characterized in that: The sleeve (11), the support rod (12) and the buckle (13) are made of ethylene-vinyl acetate copolymer.

7. The anti-interference flame-retardant cable according to claim 6, characterized in that: The sleeve (11) and the fiber tube (10) are interference fit, the outer wall of the fiber tube (10) is provided with an axially extending limiting groove (14), and the inner wall of the sleeve (11) is provided with a limiting protrusion (15) matched with the limiting groove (14).

8. The anti-interference flame-retardant cable according to claim 7, characterized in that: Before the copper wire mesh structure is braided around the two wire cores (1) and the two reinforcing ropes (2), a positioning mold (16) for positioning the two wire cores (1), the two reinforcing ropes (2) and the support frame (3) is arranged in front of the braiding machine. After the positioning mold (16) positions the two wire cores (1), the two reinforcing ropes (2) and the support frame (3), the positioning mold (16) comprises a round tube (17) and two axial slide grooves (18) arranged on the inner wall of the round tube (17). The axial slide groove (18) is an arc groove structure, and the two wire cores (1) and the two reinforcing ropes (2) are adapted to the axial slide groove (18).

9. The anti-interference flame-retardant cable according to claim 1, characterized in that: The outer shielding layer (7) is a shielding mesh woven from tinned copper wires and wrapped around the outside of the flame retardant layer (8). The shielding mesh is combined with a composite filler and then bonded to the flame retardant layer (8). The composite filler is composed of piezoelectric ceramic particles, alumina particles and expandable graphite.

Images