CN117995476A

CN117995476A - Flexible cable

Info

Publication number: CN117995476A
Application number: CN202410311122.6A
Authority: CN
Inventors: 侯伟平; 李舒侠; 侯振锋; 许清贵; 邓智展; 侯锦松
Original assignee: Hainan Wanxinda Wire And Cable Co ltd
Current assignee: Hainan Wanxinda Wire And Cable Co ltd
Priority date: 2024-03-19
Filing date: 2024-03-19
Publication date: 2024-05-07

Abstract

The invention relates to the technical field of wires and cables, and discloses a flexible cable which comprises an elastic silica gel layer, wherein a fireproof sponge layer is fixedly adhered to the inner wall of the elastic silica gel layer, a compression-resistant layer is arranged in the fireproof sponge layer on the inner side of the elastic silica gel layer, and a plurality of compression-resistant components are arranged in the compression-resistant layer along the axis; the inner wall cladding of compressive layer has the oversheath, the inner wall of oversheath is provided with the armor, be provided with corrugated tensile elastic component between oversheath and the armor, solved its cable and just through setting up wearing layer, buffer layer, increased the compressive resistance of cable to it, the compressive resistance of this kind of cable is relatively poor, unsuitable higher pressure environment's use problem, through flexible strip and buffer layer cooperation, when guaranteeing flexibility, still avoid a plurality of cable core components to receive the compression deformation, decompose external pressure to carry out compressive protection to the cable.

Description

Flexible cable

Technical Field

The invention relates to the technical field of cables, in particular to a flexible cable.

Background

The cable generally comprises a low-voltage cable, a heavy-voltage cable and a high-voltage cable, the cables are applied to power transmission and distribution, the working environments of the cables are various, the cables hung in the air are also cables laid underground, and in some special cases, the cables are required to have a certain compression resistance function, and the cables not only meet the flexibility of the cables, but also have the compression resistance function.

Aiming at the prior patent number CN201620055023.7, a flexible cable and a flexible cable assembly are disclosed, the materials of an insulating layer and a sheath layer inside the device are made of a novel ethylene-vinyl acetate copolymer (EVA) based rubber compound, the insulating layer and the sheath layer are easy to squeeze by a common plastic extruder, the traditional high-energy consumption process of steam pipeline vulcanization is abandoned, the effect of energy conservation and emission reduction is achieved, the high-speed development of the electronic communication technology is solved, the requirements on cables matched with various electronic communication systems are higher and higher, the requirements on high carrying capacity, high wear resistance, softness and the like are met, and the device also has the characteristics of miniaturization, light weight, interference resistance and pollution-free manufacturing. The insulating layer or the outer cladding layer commonly used in the current cable generally adopts a high energy consumption process of steam pipeline vulcanization, so that the problem of environmental protection cost is inevitably increased in the manufacturing process, but the pressure resistance of the cable is increased only by arranging the wear-resistant layer and the buffer layer, and the cable is poor in pressure resistance and is not suitable for the environment with higher pressure intensity; when the industrial robot works, the industrial robot needs to be frequently bent or stretched, the wire cores in the industrial robot are mutually abutted, and deformation shrinkage space is not reserved between the wire cores, so that the self stress of the cable during bending cannot be counteracted by means of self movement, the cable is continuously subjected to stretching force and torsion force in the moving process of the robot, and the surface and the inner wire cores of the cable are damaged by the stretching and torsion operations; thus, the existing demand is not met, for which we propose a flexible cable.

Disclosure of Invention

The invention aims to provide a flexible cable, which solves the problems that the insulating layer or the outer cladding commonly used in the current cable in the background art generally uses a high energy consumption process of steam pipeline vulcanization, and the environmental protection cost is inevitably increased in the manufacturing process, but only the wear-resistant layer and the buffer layer are arranged to increase the pressure resistance of the cable, so that the cable has poor pressure resistance and is not suitable for the use in a higher pressure environment; when the industrial robot works, the cable needs to be frequently bent or stretched, the wire cores inside the industrial robot are mutually abutted, deformation shrinkage space is not reserved between the wire cores, and accordingly stress of the cable during bending cannot be counteracted by means of movement of the cable, the cable is continuously subjected to stretching force and torsion force in the movement process of the robot, and the stretching and torsion operation can damage the surface of the cable and the wire cores inside the cable.

In order to achieve the above purpose, the present invention provides the following technical solutions: the flexible cable comprises an elastic silica gel layer, wherein a fireproof sponge layer is fixedly bonded to the inner wall of the elastic silica gel layer, a compression-resistant layer is arranged in the fireproof sponge layer on the inner side of the elastic silica gel layer, and a plurality of compression-resistant components are arranged in the compression-resistant layer along the axis; the inner wall cladding of compressive layer has the oversheath, the inner wall of oversheath is provided with the armor, be provided with corrugated tensile elastic component between oversheath and the armor, evenly be provided with columniform tensile strengthening rib between corrugated tensile elastic component and the armor, the medial surface fixedly connected with waterproof layer of armor, the rubber of waterproof layer is made, the lateral surface fixedly connected with flame retardant coating of waterproof layer, the flame retardant coating is tertiary acrylic emulsion and makes, the inner wall fixedly connected with insulating layer of flame retardant coating, the inboard cover of insulating layer is equipped with flexible cover, be equipped with the inner liner of shape matching in the flexible cover, flexible cover winds around wrapping on the inner liner, flexible cover and inner liner fixed connection to the front equiangular division of flexible cover has the buffer tank, inside matching of inner liner is equipped with the flexible strip, the flexible strip is equipped with the inner liner and has the space, the matching is equipped with glass fiber rope in the space, the matching is equipped with a plurality of cable core subassemblies of symmetry setting on the flexible strip, the matching is equipped with the round hole in the middle part, the matching is equipped with the buffer layer in the flexible strip;

The cable core assembly comprises an inner insulating layer and a shielding layer, wherein the shielding layer is wrapped on the outer side of the inner insulating layer, and a copper electric core is fixedly and matched in the inner insulating layer; the outer surface wall of the shielding layer is provided with at least one inward concave inner notch groove, and the inner notch groove is arranged along the axial length direction of the cable; the inner notch is provided with an elastic strip in an embedded manner, and the hardness of the elastic strip is smaller than that of the shielding layer, so that when the adjacent shielding layers are mutually extruded, an elastic shrinkage space is formed.

Preferably, the through hole is penetrated and arranged on the outer peripheral surface of the elastic silica gel layer, a fireproof sponge block is fixed on the outer peripheral surface of the fireproof sponge block, and the fireproof sponge block is adhered and fixed on the inner side of the through hole.

Preferably, an adhesive layer is adhered to the inner wall of the fireproof sponge layer, and the adhesive layer is adhered and fixed to the outer peripheral surface of the compression-resistant layer.

Preferably, the inner liner is a polyethylene wrapping layer; the flexible strip is made of rubber; the buffer layer comprises honeycomb reinforcing ribs which are fixedly matched.

Preferably, the corrugated tensile elastic piece comprises a peak section connected with the inner wall of the outer sheath and a trough end connected with the outer wall of the armor layer, the cross sections of the peak section and the trough section are of V-shaped structures, the V-shaped structures are of V-shaped structures without edges, and the tensile reinforcing ribs are arranged at the inner wall of the peak section.

Preferably, grid strips are fixedly connected between the insulating layer and the flexible sleeve; the transverse bars and the vertical bars of the grid bars are arranged vertically; the grid strips are made of an elastic material.

Preferably, each of the inner grooves is embedded with an elastic strip, and the cross section of the elastic strip is matched with the cross section of the inner groove, so that the elastic strip is embedded in the inner groove.

Preferably, the elastic strip comprises a foamed polyethylene layer or a foamed polyurethane layer, a tensile core with a circular cross section is embedded in the elastic strip, and the tensile core comprises at least one stranded steel wire rope.

Preferably, the outer wall equidistant of insulating layer is provided with a plurality of circular arc braid, and circular arc braid and insulating layer form wholly, circular arc braid is located the surface of insulating layer, the inside wall of flame retardant coating evenly is equipped with a plurality of groups spacing groove along the axis inboard to circular arc braid sets up in the spacing groove.

Preferably, the compression-resistant component comprises a plurality of reinforced steel wires which are arranged in the compression-resistant layer and uniformly distributed along the ring shape, four convex blocks which are uniformly distributed along the ring shape are arranged outside the reinforced steel wires, a plurality of grooves are formed in the reinforced steel wires, and the grooves are matched with the convex blocks.

Compared with the prior art, the invention has the beneficial effects that:

1. According to the cable, the anti-seismic effect of the cable can be improved through the elastic silica gel layer and the fireproof sponge layer, the fireproof sponge layer and the fireproof sponge block have the characteristics of fireproof, heat insulation and heat preservation, the influence of the external temperature environment on the inner side of the cable can be reduced, the aging of the outer sheath caused by the condition that the upper time is in high-temperature insolation and the like is avoided, meanwhile, a certain gap exists between the fireproof sponge layer and the compression-resistant layer, the heat insulation effect can be further achieved through air, and the long-term protection effect of the compression-resistant layer on the copper battery core is ensured; the elastic silica gel layers can be adhered and fixed on the outer peripheral surface of the compression-resistant layer through the spaced adhesive layers, so that the falling-off of the elastic silica gel layers is avoided, when the outer side of the cable is subjected to larger pulling force, the pulling force is usually only applied to the outer side of the elastic silica gel layers, so that the elastic silica gel layers are pulled and deformed, rebound to the original state after the elastic silica gel layers are not subjected to the pulling force, the larger pulling force can not be generated on the compression-resistant layer and the inner cable core at the same time, the tensile property of the cable is greatly improved, and the reduction of the protection effect caused by the breakage of the inner structure is avoided; the inside of compressive layer is provided with a plurality of reinforcing steel wires along annular evenly distributed, and the reinforcing steel wires provide impact resistance and toughness for the cable to prevent external acting force from damaging the wire core and bringing danger, the outside of the reinforcing steel wires is provided with four lugs along annular evenly distributed, and the lugs are matched with grooves formed in the compressive layer, so that the stability of the reinforcing steel wires in the compressive layer is improved, and the cable is protected; the compression resistance of the cable can be guaranteed by the mode that the corrugated tensile elastic pieces and the tensile reinforcing ribs are matched to buffer part pressure, the flexible strips are extruded inwards by the pressure, and the five groups of cable cores are distributed around the buffer layer, so that the buffer layer is extruded and contracted, a buffer protection effect is achieved on a plurality of cable core components, the flexible strips are matched with the buffer layer, the flexible strips are prevented from being deformed under pressure while the flexibility is guaranteed, and the external pressure is decomposed, so that the cable is protected against compression;

2. The invention can increase the tensile strength through the circular arc braiding strips matched with the buffer grooves, the circular arc braiding strips can improve the tensile strength of the circular arc braiding strips, and can decompose the external pressure, so that the cable is subjected to compressive protection, steel wires are not required to be placed in the cable, the dead weight of the cable is greatly reduced, the cost is reduced, the whole structure achieves the compressive and tensile effects, the structure is reasonable and simple, the use is convenient, the compressive and tensile functions are realized, the compressive capacity is strong, the tensile strength is high, the influence of external tension or pressure is not easy, the service life is prolonged, the safety and reliability are improved, the service performance is improved, the possibility of damage of the cable when the cable is used for a long time is reduced, and the influence on an inner conductor is avoided; the steel wire rope has higher tensile strength, fatigue resistance and impact toughness, is embedded in the elastic strip as a tensile core, and can strengthen the tensile property of the cable core assembly after being molded, thereby strengthening the tensile property of the cable after being cabled.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a front view of the entire present invention;

FIG. 3 is a schematic view of a part of the elastic silica gel layer according to the present invention;

FIG. 4 is a side view of the entirety of the present invention;

FIG. 5 is a schematic view of the overall partial structure of the present invention;

FIG. 6 is an enlarged partial schematic view of the structure of FIG. 1A according to the present invention;

fig. 7 is an enlarged partial structure diagram of the present invention at B in fig. 1.

In the figure: 1. an elastic silica gel layer; 101. a fireproof sponge layer; 102. a through hole; 103. an adhesive layer; 104. fireproof sponge blocks; 2. a compression-resistant layer; 201. a groove; 202. a bump; 203. reinforcing the steel wire; 3. an outer sheath; 4. tensile reinforcing ribs; 5. corrugated tensile elastic members; 6. an armor layer; 7. a waterproof layer; 8. a fire-blocking layer; 81. a limit groove; 9. an insulating layer; 91. grid bars; 92. arc braiding strips; 10. a flexible sleeve; 11. a buffer tank; 12. an inner liner layer; 13. a glass fiber rope; 14. a flexible strip; 15. a buffer layer; 16. a shielding layer; 17. an inner insulating layer; 18. a copper cell; 19. an elastic strip; 20. and (3) a tensile core.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

Referring to fig. 1 to 7, an embodiment of the present invention provides: a flexible cable comprises an elastic silica gel layer 1, wherein a fireproof sponge layer 101 is fixedly adhered to the inner wall of the elastic silica gel layer 1, a compression-resistant layer 2 is arranged on the inner side of the elastic silica gel layer 1 and positioned in the fireproof sponge layer 101, and a plurality of compression-resistant components are arranged inside the compression-resistant layer 2 along the axis; the inner wall cladding of compressive layer 2 has oversheath 3, the inner wall of oversheath 3 is provided with armor 6, be provided with corrugated tensile elastic element 5 between oversheath 3 and the armor 6, evenly be provided with columniform tensile strengthening rib 4 between corrugated tensile elastic element 5 and the armor 6, the medial surface fixedly connected with waterproof layer 7 of armor 6, waterproof layer 7's rubber is made, waterproof layer 7's lateral surface fixedly connected with flame retardant coating 8, flame retardant coating 8 is made for tertiary acrylic emulsion, flame retardant coating 8's inner wall fixedly connected with insulating layer 9, insulating layer 9's inboard cover is equipped with flexible cover 10, be equipped with shape matched inner liner 12 in the flexible cover 10, flexible cover 10 winds around wrapping on inner liner 12, flexible cover 10 and inner liner 12 fixed connection, and buffer tank 11 has been seted up to flexible cover 10's front equiangular degree, inside matching of inner liner 12 is equipped with flexible strip 14, flexible strip 14 and 12 exist the space, the matching is equipped with glass fiber rope 13 in the space, the matching is equipped with a plurality of cable core components of symmetry setting on flexible strip 14, flexible strip 14 middle part matching is equipped with the round hole, the matching is equipped with buffer 15 in the round hole.

The cable core assembly comprises an inner insulating layer 17 and a shielding layer 16, wherein the shielding layer 16 is wrapped on the outer side of the inner insulating layer 17, and a copper electric core 18 is fixedly matched and arranged in the inner insulating layer 17; the outer surface wall of the shielding layer 16 is provided with at least one inward concave inner notch groove which is arranged along the axial length direction of the cable; an elastic strip 19 is embedded in the inner notch, and the hardness of the elastic strip 19 is smaller than that of the shielding layer 16, so that when adjacent shielding layers 16 are mutually extruded, an elastic shrinkage space is provided.

The outer peripheral surface of the elastic silica gel layer 1 is provided with a through hole 102 in a penetrating way, the outer peripheral surface of the fireproof sponge layer 101 is fixedly provided with a fireproof sponge block 104, and the fireproof sponge block 104 is fixedly adhered to the inner side of the through hole 102. Through adopting above-mentioned technical scheme, fireproof sponge layer 101 and fireproof sponge piece 104 have the effect of fire prevention, heat preservation and heat insulation, reduce the irreversible damage that external high temperature led to the fact the cable inboard, in the rainy summer of high temperature, fireproof sponge piece 104 can absorb a small amount of rainwater or vapor when rainy or air humidity is higher to dispel the heat through the evaporation of moisture when the high temperature insolatees.

The inner wall of the fireproof sponge layer 101 is adhered with an adhesive layer 103, and the adhesive layer 103 is adhered and fixed on the outer peripheral surface of the compression-resistant layer 2. Through adopting above-mentioned technical scheme, can make elastic silica gel layer 1 bond through spaced viscose layer 103 and be fixed in the resistance to compression outer peripheral face, avoid elastic silica gel layer 1's drop, when the cable receives great pulling force, the pulling force is usually only acted on elastic silica gel layer 1 outside, make it pull deformation to rebound to original state after not receiving the pulling force, and can not produce great pulling force simultaneously to resistance to compression layer and cable core, the pull resistance of great cable, and elastic silica gel layer 1 has certain shock attenuation effect, reduce the influence that vibrations caused the cable core.

The inner liner 12 is a polyethylene wrapping layer; the flexible strip 14 is made of rubber; the buffer layer 15 comprises honeycomb-shaped reinforcing ribs which are fixedly matched.

The corrugated tensile elastic piece 5 comprises a peak section connected with the inner wall of the outer sheath 3 and a trough end connected with the outer wall of the armor layer 6, the cross sections of the peak section and the trough section are of V-shaped structures, the V-shaped structures are of V-shaped structures without edges and corners, and the tensile reinforcing ribs 4 are arranged at the inner wall of the peak section.

A grid strip 91 is fixedly connected between the insulating layer 9 and the flexible sleeve 10; the transverse bars and the vertical bars of the grid bars 91 are arranged vertically; the mesh strip 91 is made of an elastic material.

Elastic strips 19 are embedded in each inner notch, and the cross section shape of each elastic strip 19 is matched with that of each inner notch, so that the elastic strips 19 are embedded in the inner notches.

The elastic strip 19 comprises a foamed polyethylene layer or a foamed polyurethane layer, and a tensile core 20 with a circular cross section is embedded in the elastic strip 19, wherein the tensile core 20 comprises at least one stranded steel wire rope.

The equidistant a plurality of circular arc braid strip 92 that is provided with of outer wall of insulating layer 9, circular arc braid strip 92 and insulating layer 9 form wholly, and circular arc braid strip 92 is located the surface of insulating layer 9, and the inside wall of flame retardant coating 8 evenly is equipped with a plurality of groups of spacing groove 81 along the axis inboard to circular arc braid strip 92 sets up in spacing groove 81.

The compression-resistant assembly comprises a plurality of reinforcing steel wires 203 which are arranged in the compression-resistant layer 2 and uniformly distributed along the ring shape, four convex blocks 202 which are uniformly distributed along the ring shape are arranged outside the reinforcing steel wires 203, a plurality of grooves 201 are formed in the reinforcing steel wires 203, and the grooves 201 are matched with the convex blocks 202.

When the flexible cable is used, the elastic silica gel layer 1 and the fireproof sponge layer 101 can improve the shock resistance effect of the cable, the fireproof sponge layer 101 and the fireproof sponge block 104 have the characteristics of fireproof, heat insulation and heat preservation, the influence of the external temperature environment on the inner side of the cable can be reduced, the aging of an outer sheath caused by the condition that the upper time is in high-temperature insolation and the like is avoided, meanwhile, a certain gap exists between the fireproof sponge layer 101 and the compression-resistant layer 2, the heat insulation effect can be further achieved through air, and the long-term protection effect of the compression-resistant layer 2 on the copper battery core 18 is ensured; the spaced adhesive layers 103 can enable the elastic silica gel layer 1 to be adhered and fixed on the outer peripheral surface of the compression-resistant layer 2, so that the falling-off of the elastic silica gel layer 1 is avoided, when the outer side of the cable is subjected to large tensile force, the tensile force is usually only applied to the outer side of the elastic silica gel layer 1, so that the elastic silica gel layer is pulled and deformed, and is rebounded to the original state after not subjected to the tensile force, and the large tensile force can not be generated on the compression-resistant layer 2 and the inner cable core at the same time, so that the tensile property of the cable is greatly improved, and the reduction of the protection effect caused by the breakage of the inner structure is avoided; the inside of the compression-resistant layer 2 is provided with a plurality of reinforced steel wires 203 which are uniformly distributed along the ring shape, the reinforced steel wires 203 provide impact resistance and toughness for the cable so as to prevent the cable from being damaged by external acting force and bring danger, the outside of the reinforced steel wires 203 is provided with four convex blocks 202 which are uniformly distributed along the ring shape, and the convex blocks 202 are matched with grooves 201 arranged inside the compression-resistant layer 2 so as to ensure the stability of the reinforced steel wires 203 inside the compression-resistant layer 2, thereby improving the protection of the cable; the compression resistance of the cable can be guaranteed by the way that the arranged corrugated tensile elastic piece 5 and the tensile reinforcing ribs 4 are matched to buffer partial pressure, the flexible strips 14 are extruded inwards by the pressure, and five groups of cable cores are distributed around the buffer layer 15, so that the buffer layer 15 is extruded and contracted to play a role in buffering and protecting a plurality of cable core components, the flexible strips 14 are matched with the buffer layer 15, the flexible strips are ensured, and meanwhile, the cable core components are prevented from being deformed under pressure and decomposing the external pressure, so that the cable is compression-resistant and protected;

The circular arc braiding strips 92 matched with the buffer groove 11 can increase the tensile strength, the circular arc braiding strips 92 can improve the tensile strength of the circular arc braiding strips 92, and can decompose the external pressure, so that the cable is subjected to compression-resistant protection, steel wires are not required to be placed in the cable, the dead weight of the cable is greatly reduced, the cost is reduced, the whole structure achieves the compression-resistant and tensile effects, the structure is reasonable and simple, the use is convenient, the compression-resistant and tensile functions are realized, the compression-resistant capability is strong, the tensile strength is high, the influence of external tension or pressure is not easy, the service life is prolonged, the safety and reliability are improved, the service performance is improved, the possibility of damage of the cable when the cable is used for a long time is reduced, and the influence on an inner conductor is avoided; the steel wire rope has higher tensile strength, fatigue resistance and impact toughness, is embedded in the elastic strip 19 as the tensile core 20, and can strengthen the tensile property of the cable core assembly after being molded, thereby strengthening the tensile property of the cable after being cabled, and has good flexibility and corrosion resistance, and the tensile core 20 is embedded in the elastic strip 19, so that the flexibility of the cable after being cabled is not greatly influenced.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A flexible cable comprising an elastic silica gel layer (1), characterized in that: the fireproof sponge layer (101) is fixedly adhered to the inner wall of the elastic silica gel layer (1), the compression-resistant layer (2) is arranged in the fireproof sponge layer (101) on the inner side of the elastic silica gel layer (1), and a plurality of compression-resistant components are arranged in the compression-resistant layer (2) along the axis; the inner wall cladding of compressive layer (2) has oversheath (3), the inner wall of oversheath (3) is provided with armor (6), be provided with flute shape tensile elastic component (5) between oversheath (3) and armor (6), evenly be provided with columniform tensile strengthening rib (4) between flute shape tensile elastic component (5) and armor (6), medial surface fixedly connected with waterproof layer (7) of armor (6), the rubber of waterproof layer (7) makes, lateral surface fixedly connected with flame retardant coating (8) of waterproof layer (7), flame retardant coating (8) are made for tertiary acrylic emulsion, the inner wall fixedly connected with insulating layer (9) of flame retardant coating (8), the inboard cover of insulating layer (9) is equipped with flexible cover (10), be equipped with shape matched's inner liner (12) in flexible cover (10), flexible cover (10) are around wrapping on inner liner (12), flexible cover (10) and inner liner (12) fixedly connected with to flexible cover (10) are equipped with flame retardant coating (8), flexible strip (14) are equipped with flexible rope (14) and inner liner (12) are equipped with equiangular, flexible strip (14) are equipped with inside clearance matched with each other, a plurality of cable core components which are symmetrically arranged are arranged on the flexible strip (14) in a matching way, a round hole is arranged in the middle of the flexible strip (14) in a matching way, and a buffer layer (15) is arranged in the round hole in a matching way;

The cable core assembly comprises an inner insulating layer (17) and a shielding layer (16), wherein the shielding layer (16) is wrapped on the outer side of the inner insulating layer (17), and a copper electric core (18) is fixedly arranged in the inner insulating layer (17) in a matching manner; the outer surface wall of the shielding layer (16) is provided with at least one inward concave inner notch groove, and the inner notch groove is arranged along the axial length direction of the cable; an elastic strip (19) is embedded in the inner notch, and the hardness of the elastic strip (19) is smaller than that of the shielding layers (16), so that when the adjacent shielding layers (16) are mutually extruded, an elastic shrinkage space is formed.

2. A flexible cable according to claim 1, wherein: the outer peripheral surface of the elastic silica gel layer (1) is provided with a through hole (102) in a penetrating mode, the outer peripheral surface of the fireproof sponge layer (101) is fixedly provided with a fireproof sponge block (104), and the fireproof sponge block (104) is fixedly adhered to the inner side of the through hole (102).

3. A flexible cable according to claim 1, wherein: the inner wall of the fireproof sponge layer (101) is adhered with an adhesive layer (103), and the adhesive layer (103) is adhered and fixed on the outer peripheral surface of the compression-resistant layer (2).

4. A flexible cable according to claim 1, wherein: the lining layer (12) is a polyethylene wrapping layer; the flexible strip (14) is made of rubber; the buffer layer (15) comprises honeycomb reinforcing ribs which are fixedly matched.

5. A flexible cable according to claim 1, wherein: the corrugated tensile elastic piece (5) comprises a peak section connected with the inner wall of the outer sheath (3) and a trough end connected with the outer wall of the armor (6), the cross sections of the peak section and the trough section are of V-shaped structures, the V-shaped structures are of V-shaped structures without edges, and the tensile reinforcing ribs (4) are arranged at the inner wall of the peak section.

6. A flexible cable according to claim 1, wherein: a grid strip (91) is fixedly connected between the insulating layer (9) and the flexible sleeve (10); the transverse strips and the vertical strips of the grid strips (91) are arranged vertically; the grid strip (91) is made of an elastic material.

7. A flexible cable according to claim 1, wherein: each inner notch is embedded with an elastic strip (19), and the cross section of the elastic strip (19) is matched with that of the inner notch, so that the elastic strip (19) is embedded in the inner notch.

8. A flexible cable according to claim 1, wherein: the elastic strip (19) comprises a foamed polyethylene layer or a foamed polyurethane layer, a tensile core (20) with a circular cross section is embedded in the elastic strip (19), and the tensile core (20) comprises at least one stranded steel wire rope.

9. A flexible cable according to claim 1, wherein: the outer wall equidistant of insulating layer (9) is provided with a plurality of circular arc braid (92), and circular arc braid (92) and insulating layer (9) form wholly, circular arc braid (92) are located the surface of insulating layer (9), the inside wall of flame retardant coating (8) evenly is equipped with a plurality of groups spacing groove (81) along the axis inboard to circular arc braid (92) set up in spacing groove (81).

10. A flexible cable according to claim 1, wherein: the compression-resistant assembly comprises a plurality of reinforcing steel wires (203) which are arranged inside a compression-resistant layer (2) and uniformly distributed along the shape of a ring, four convex blocks (202) which are uniformly distributed along the shape of the ring are arranged outside the reinforcing steel wires (203), a plurality of grooves (201) are formed in the reinforcing steel wires (203), and the grooves (201) are matched with the convex blocks (202).