CN210349405U

CN210349405U - High-temperature-resistant cable

Info

Publication number: CN210349405U
Application number: CN201921566759.0U
Authority: CN
Inventors: 张里土
Original assignee: Shanghai Xianglong Cable Manufacturing Co Ltd
Current assignee: Shanghai Xianglong Cable Manufacturing Co Ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-04-17
Anticipated expiration: 2029-09-19

Abstract

The utility model relates to the technical field of cables, and discloses a high-temperature-resistant cable, which is characterized by comprising a cable core, a PTFE (polytetrafluoroethylene) winding layer, a metal protective layer, an aluminum-plastic composite layer, a Kevlar fiber layer and a silicon rubber sheath which are sequentially arranged from inside to outside, wherein a supporting framework is arranged between the cable core and the PTFE winding layer, and a flame-retardant layer is filled in the gap between the supporting framework and the cable core as well as between the supporting framework and the PTFE winding layer; the cable is characterized in that a mark block is detachably connected outside the silicone rubber sheath, and a mark code for indicating the type of the cable is sprayed on the mark block. The utility model discloses have that high temperature resistant performance is good, signal and power transmission can not break down, the effect that the potential safety hazard is little.

Description

High-temperature-resistant cable

Technical Field

The utility model relates to a technical field of cable, more specifically say that it relates to a high temperature resistant cable.

Background

A cable is generally an insulated conductor formed by one or more mutually insulated conductive cores disposed in a sealed sheath, which may be covered with a protective covering for transmitting, distributing electrical energy or transmitting electrical signals.

At present, chinese patent with publication number CN206907542U discloses a cable, which comprises an outer protective layer, a conductor and an insulating layer wrapped on the conductor, wherein a water-blocking tape wrapping is wrapped on the insulating layer of the cable, a water-blocking rope is filled between the water-blocking tape wrapping and the outer protective layer, and a moisture-proof film wrapped on the water-blocking rope is further arranged between the water-blocking rope and the outer protective layer. The cable can effectively prevent moisture in the environment from influencing the performance of the cable.

Due to the complex and variable working environment of the cable, the cable is often arranged in a high-temperature environment in practical use. However, the cable is not provided with a material capable of bearing high temperature, the high temperature resistance of the cable is poor, the cable can be damaged or the performance of the cable is reduced due to the fact that the cable cannot bear high temperature, signal or power transmission is caused to break down, and potential safety hazards are large.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model provides a high temperature resistant cable has that high temperature resistance can be good, signal and power transmission can not break down, the effect that the potential safety hazard is little.

In order to achieve the above purpose, the utility model provides a following technical scheme: a high-temperature-resistant cable comprises a cable core, a PTFE (Polytetrafluoroethylene) wrapping layer, a metal protective layer, an aluminum-plastic composite layer, a Kevlar fiber layer and a silicon rubber sheath which are sequentially arranged from inside to outside, wherein a supporting framework is arranged between the cable core and the PTFE wrapping layer, and a flame-retardant layer is filled in gaps among the supporting framework, the cable core and the PTFE wrapping layer; the cable is characterized in that a mark block is detachably connected outside the silicone rubber sheath, and a mark code for indicating the type of the cable is sprayed on the mark block.

By adopting the technical scheme, the PTFE is a high molecular compound formed by polymerizing tetrafluoroethylene hydrocarbon, and has excellent high temperature resistance, chemical stability, corrosion resistance, sealing property, electrical insulation property and good ageing resistance. The PTFE wrapping layer plays an insulating role, so that the cable core is not easy to leak electricity to cause safety accidents; and can also prevent the fire from spreading outwards when the cable core generates high temperature fire when working. The metal protection layer improves the compression resistance of the cable, so that the cable is not easy to deform when being stressed by external heavy pressure. The aluminum-plastic composite layer plays waterproof and shielding roles, prevents the magnetic field generated by the cable core during working from interfering with the external magnetic field, and ensures that signal transmission cannot be distorted. The Kevlar fiber layer has permanent heat resistance and flame retardance, generates no molten drops when meeting fire, does not generate toxic gas, thickens the cloth surface when burning the fire, improves the sealing property, and can prevent the fire from spreading inwards when the cable catches fire; the flame-retardant layer plays a role in further flame retardance, and the heat resistance of the cable is improved. The supporting framework plays a role in secondary protection when the metal protective layer loses efficacy, and the cable core is prevented from being crushed by an external heavy object. The mark code can be used for distinguishing different cable models, and is convenient for people to correctly disassemble and assemble cables when overhauling or installing circuits. If the mark code is covered by dirt or is worn out to cause difficulty in distinguishing, people can detach the mark block for re-spraying or replace the mark block with a new mark block, and compared with the method for detaching the cable for re-marking, the operation is simple and convenient.

The utility model discloses further set up to: the supporting framework is a silicon rubber framework.

By adopting the technical scheme, the silicon rubber has remarkable high-temperature stability and excellent insulating property, and the silicon rubber material is used as the supporting framework to play a role in supporting and protecting the cable core and further improve the high-temperature resistance and the insulating property of the cable.

The utility model discloses further set up to: the cross section of the supporting framework is a regular triangle with a hollow inner part, and the cable core is positioned at the center of the supporting framework.

By adopting the technical scheme, the supporting framework has good stability and good cable core protection effect.

The utility model discloses further set up to: the flame-retardant layer is a halogen-free low-smoke polyolefin layer.

By adopting the technical scheme, the halogen-free low-smoke polyolefin has better physical and mechanical properties and good flame retardant property, does not generate harmful gas during combustion, and can reduce air pollution and influence on human health.

The utility model discloses further set up to: the cable core comprises a tinned copper wire, an FEP insulating layer and a tinned copper wire shielding layer which are sequentially arranged from inside to outside.

Through adopting above-mentioned technical scheme, the copper line has good electric conductivity and heat conductivity, has not only strengthened the corrosion resisting ability of copper line at the surface tinning of copper line, can also improve the weldability of copper line and the barrier effect between copper line and the FEP insulating layer for the FEP insulating layer is difficult for strikeing. The FEP insulating layer has excellent insulating property and heat resistance, and the insulating property has small change along with temperature. The tinned copper wire shielding layer is formed by weaving tinned copper wires, so that mutual interference between the cable core and an external magnetic field can be shielded, and normal work of the tinned copper wires is guaranteed.

The utility model discloses further set up to: and a fireproof coating is arranged outside the silicon rubber sheath.

Through adopting above-mentioned technical scheme, fire-retardant coating has strengthened the fire resistance of cable, and when the cable was caught fire outward, the silicon rubber sheath can not direct and the flame contact, avoids the intensity of a fire to pass through the silicon rubber sheath and to spread in the cable.

The utility model discloses further set up to: the fireproof coating is a non-toxic expansion fireproof coating layer.

By adopting the technical scheme, the non-toxic expansion fireproof coating can not emit toxic gas during combustion, and has the effect of environmental protection.

The utility model discloses further set up to: the utility model discloses a mark piece, including silicon rubber sheath, fixed slot, sign piece, sign code spraying, the fixed slot is equipped with on the circumference lateral wall of silicon rubber sheath, the bottom surface of fixed slot is equipped with the gluing layer, the sign piece passes through gluing layer adhesion in the fixed slot, the terminal surface on gluing layer is kept away from at the sign piece to the sign code spraying.

By adopting the technical scheme, when the mark code cannot be distinguished, people can pull out the mark block forcibly to dismantle the mark block; when the mark block with the intact mark code is installed, people can brush glue on the bottom wall of the fixing groove again or brush glue on the mark block to fix the mark block because the original adhesive layer loses the viscosity. The side wall of the fixed groove plays a limiting role, so that the mark block is not easy to horizontally move relative to the cable.

The utility model discloses further set up to: the thickness of the mark block is larger than the depth of the fixing groove, and a moving hole is formed in the part, extending out of the fixing groove, of the mark block.

By adopting the technical scheme, when the mark block is detached, people can insert the thin rod with the diameter smaller than the inner diameter of the moving hole into the moving hole, and then lift the mark block by utilizing the thin rod, so that the mark block is more convenient to operate compared with a direct hand-pulling mode.

The utility model discloses further set up to: the end face, far away from the adhesive layer, of the mark block is provided with a transparent PET film.

By adopting the technical scheme, the light transmittance of the PET film is good, the mark code can be protected from being worn on the premise of not influencing the exposure of the mark code, and the service life of the mark block is prolonged.

To sum up, the utility model discloses following beneficial effect has:

the heat-resistant and flame-retardant performances of the PTFE wrapping layer, the Kevlar fiber layer, the flame-retardant layer and the fireproof coating layer are good, so that the heat-resistant and flame-retardant performances of the cable are improved, the high-temperature resistance of the cable is improved, the distortion of transmission signals caused when the cable works in a high-temperature environment is avoided, and the potential safety hazard is small;

2. the supporting framework and the metal protective layer play a role in supporting and protecting the cable core, so that the cable core is not easy to deform due to extrusion of a heavy object, and the electrical performance of the cable is not influenced;

3. the mark code can be used for distinguishing different cable models, so that people can conveniently and correctly wire when overhauling or assembling the line; when the mark code can not be distinguished, people can pull the mark block forcibly to detach and replace the mark block, and the operation is convenient.

Drawings

FIG. 1 is a schematic sectional view of the present embodiment;

fig. 2 is a schematic view of a partial explosion when the flag block and the fixing groove are separated in this embodiment.

Reference numerals: 1. a cable core; 11. tinned copper wire; 12. an FEP insulating layer; 13. a tinned copper wire shielding layer; 2. a PTFE lapping layer; 3. a metal protective layer; 4. an aluminum-plastic composite layer; 5. a Kevlar fiber layer; 6. a silicone rubber sheath; 61. fixing grooves; 62. an adhesive layer; 7. a fire-retardant coating; 8. a flag block; 81. moving the hole; 82. a PET film; 9. a support framework; 10. a flame retardant layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses a high temperature resistant cable, as shown in fig. 1 and 2, the cable comprises a cable core 1, a PTFE (polytetrafluoroethylene) wrapping layer 2, a metal protective layer 3, an aluminum-plastic composite layer 4, a Kevlar fiber layer 5 and a silicon rubber sheath 6 which are sequentially arranged from inside to outside, wherein the outer side of the silicon rubber sheath 6 is also provided with a fireproof coating 7 and is detachably connected with a mark block 8.

As shown in fig. 1, the cable core 1 includes a tinned copper wire 11, an FEP insulating layer 12 and a tinned copper wire shielding layer 13 which are arranged in sequence from inside to outside. The electric conductivity and the heat conductivity of copper line are good, and the corrosion resistance of copper line has not only been strengthened in the surface tin-plating of copper line, can also improve the solderability of copper line and the barrier effect between copper line and FEP insulating layer 12 for FEP insulating layer 12 is difficult for sticking. The FEP insulating layer 12 is excellent in insulating performance and small in temperature variation. The tinned copper wire shielding layer 13 is formed by weaving the tinned copper wire, can shield the mutual interference of the cable core 1 and an external magnetic field, and ensures the normal work of the tinned copper wire.

As shown in fig. 1, a supporting framework 9 is arranged between the cable core 1 and the PTFE lapping layer 2, the supporting framework 9 is made of a silicon rubber material and has a hollow regular triangle cross section, and the cable core 1 is arranged at the center of the supporting framework 9. The supporting framework 9 plays a role in supporting and protecting the cable core 1, so that the cable core 1 is not easy to deform when the cable is pressed.

As shown in fig. 1, a flame retardant layer 10 is filled in a gap between the support framework 9 and the cable core 1 and a gap between the support framework and the PTFE lapping layer 2, and the flame retardant layer 10 is made of a halogen-free low-smoke polyolefin material. The flame retardant layer 10 plays a role of flame retardancy and heat resistance, and does not generate harmful gas during combustion, thereby reducing air pollution and influence on human health.

As shown in fig. 1, the PTFE lapping layer 2 is made of PTFE material, and has excellent high temperature resistance, chemical stability, corrosion resistance, sealing property, electrical insulation property and good aging resistance. The PTFE lapping layer 2 not only plays a role in protecting the cable core 1 and insulating, so that the cable core 1 is not easy to leak electricity to cause safety accidents; and can also prevent the fire from spreading outwards when the cable core 1 works to generate high temperature and fire.

As shown in fig. 1, the metal protection layer 3 is made of medium or low carbon steel or low alloy steel, and has the advantages of high strength and good toughness compared with non-metal materials, so that the cable is not easily broken in the using process.

As shown in fig. 1, the aluminum-plastic composite layer 4 has excellent waterproof and shielding properties, and not only can further prevent the magnetic field generated by the cable core 1 during operation from interfering with the external magnetic field, but also can prevent moisture from entering the cable core 1 to influence the operation of the tinned copper wire.

As shown in fig. 1, the kevlar fiber layer 5 is made of kevlar fiber material, has permanent heat resistance and flame retardancy, does not generate molten drops when exposed to fire, does not generate toxic gas, thickens the cloth surface when exposed to fire, improves the sealing property, and can prevent the fire from spreading inwards when the cable is exposed to fire.

As shown in fig. 1, the silicone rubber sheath 6 is made of silicone rubber, and the silicone rubber has a certain deformation characteristic, so as to protect the kevlar fiber layer 5, and make the kevlar fiber layer 5 not easy to wear.

As shown in fig. 1, the fireproof coating 7 is a nontoxic intumescent fireproof coating layer, and the fireproof coating 7 further enhances the fire resistance of the cable and plays a role in protecting silicon rubber, so that the silicon rubber sheath 6 is not easy to ignite when the cable catches fire outside. The nontoxic intumescent fire-retardant coating does not emit toxic gas during combustion, and has the effect of environmental protection.

As shown in fig. 1 and 2, a plurality of fixing grooves 61 are distributed on the circumferential side wall of the silicone rubber sheath 6 along the length direction thereof, an adhesive layer 62 is coated on the bottom wall of the fixing grooves 61, and the sign block 8 is adhered in the fixing grooves 61 through the adhesive layer 62. The thickness of the mark block 8 is greater than the depth of the fixing groove 61, and the end face, away from the adhesive layer 62, of the mark block 8 is sprayed with a mark code for indicating the type of the cable. When a plurality of cables of different models are placed together, people can distinguish the cables of different models by using the mark codes, and correct wiring is facilitated when people overhaul or install circuits.

As shown in fig. 1 and 2, the side wall of the flag block 8 exposed from the fixing groove 61 is provided with a moving hole 81, and the moving hole 81 penetrates through the two opposite side walls of the flag block 8. When the mark code is dirty or worn out and cannot be distinguished, people can insert a thin rod with the diameter smaller than the inner diameter of the moving hole 81 into the moving hole 81, and then the thin rod is used for driving the mark block 8 to move towards the side far away from the fixed groove 61, so that the mark block 8 with the intact mark code can be replaced. The end face, far away from the adhesive layer 62, of the mark block 8 is fixed with a transparent PET film 82, and the PET film 82 can protect the mark code from being worn on the basis of not influencing the view of the mark code.

The working principle of the embodiment is as follows: PTFE around covering 2, Kevlar fibre layer 5, fire-retardant layer 10 and fire-retardant coating layer not only can block the intensity of a fire and spread owing to its good heat-resisting fire behaviour, can also improve the high temperature resistance of cable self, avoid the cable to reduce at high temperature environment during operation electrical property, can not lead to transmission signal distortion, potential safety hazard is little. The mark code can be used for distinguishing cables of different models, and is convenient for people to correctly wire when a line is overhauled or installed. When the mark code is worn out and cannot be distinguished, people can take the mark code out of the fixing groove 61 for replacement, and the identification of the cable model cannot be influenced.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. A high temperature resistant cable characterized in that: the cable comprises a cable core (1), a PTFE (polytetrafluoroethylene) wrapping layer (2), a metal protection layer (3), an aluminum-plastic composite layer (4), a Kevlar fiber layer (5) and a silicon rubber sheath (6) which are sequentially arranged from inside to outside, wherein a supporting framework (9) is arranged between the cable core (1) and the PTFE wrapping layer (2), and a flame-retardant layer (10) is filled in a gap between the supporting framework (9) and the cable core (1) as well as the PTFE wrapping layer (2); the cable is characterized in that a mark block (8) is detachably connected outside the silicon rubber sheath (6), and a mark code for indicating the type of the cable is sprayed on the mark block (8).

2. A high temperature resistant cable according to claim 1, wherein: the supporting framework (9) is a silicon rubber framework.

3. A high temperature resistant cable according to claim 2, wherein: the cross section of the supporting framework (9) is a regular triangle with a hollow inner part, and the cable core (1) is positioned at the center of the supporting framework (9).

4. A high temperature resistant cable according to claim 1, wherein: the flame-retardant layer (10) is a halogen-free low-smoke polyolefin layer.

5. A high temperature resistant cable according to claim 1, wherein: the cable core (1) comprises a tinned copper wire (11), an FEP insulating layer (12) and a tinned copper wire shielding layer (13) which are sequentially arranged from inside to outside.

6. A high temperature resistant cable according to claim 1, wherein: and a fireproof coating (7) is arranged outside the silicon rubber sheath (6).

7. A high temperature resistant cable according to claim 6, wherein: the fireproof coating (7) is a non-toxic expansion fireproof coating layer.

8. A high temperature resistant cable according to claim 1, wherein: be equipped with fixed slot (61) on the circumference lateral wall of silicon rubber sheath (6), the bottom surface of fixed slot (61) is equipped with adhesive layer (62), mark piece (8) are in fixed slot (61) through adhesive layer (62) adhesion, the terminal surface of adhesive layer (62) is kept away from in mark piece (8) to the sign code spraying.

9. A high temperature resistant cable according to claim 8, wherein: the thickness of the mark block (8) is larger than the depth of the fixing groove (61), and a moving hole (81) is formed in the part, extending out of the fixing groove (61), of the mark block (8).

10. A high temperature resistant cable according to claim 8, wherein: the end face, far away from the adhesive layer (62), of the mark block (8) is provided with a transparent PET film (82).