CN210429368U

CN210429368U - Double-layer insulation shielding flame-retardant long-life cable wire

Info

Publication number: CN210429368U
Application number: CN201921032770.9U
Authority: CN
Inventors: 刘军霞
Original assignee: Dexin Cable Group Co Ltd
Current assignee: Dexin Cable Group Co Ltd
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2020-04-28
Anticipated expiration: 2029-07-04

Abstract

The utility model discloses a double-layer insulation shielding flame-retardant long-life cable wire, which comprises a cable body, wherein the cable body comprises a cable core bundle, a water-blocking layer, a heat dissipation layer, a shielding layer and a sheath layer which are arranged from inside to outside in sequence; a crumpling energy absorption mechanism is also arranged between the sheath layer and the shielding layer in a matching manner, the crumpling energy absorption mechanism comprises a plurality of crumpling energy absorption tubes which are uniformly distributed along the circumferential direction of the cross section of the cable body, each crumpling energy absorption tube comprises a tube body and an elastic element arranged in the tube body, a sliding groove is formed in the circumferential surface of the tube body, a U-shaped contact piece is arranged in the sliding groove in a matching manner, and the upper side and the lower side of the U-shaped contact piece are fixedly connected with the sheath layer and the elastic element; the crumpling energy-absorbing structure further comprises arc-shaped elastic supporting pieces symmetrically arranged on two sides of the crumpling energy-absorbing tube, and when the cable body is impacted and extruded by external force, impact force can be effectively absorbed and weakened, so that the core part of the cable body is protected from being damaged, and the service life of the cable is guaranteed.

Description

Double-layer insulation shielding flame-retardant long-life cable wire

Technical Field

The utility model relates to a cable wire field, concretely relates to fire-retardant long-life cable wire of double-deck insulation shielding.

Background

The existing cable is composed of a conducting wire and an insulating flame-retardant and shielding material which is coated outside, the capacity of bearing mechanical external force is very limited, the cable is easy to be damaged due to external force collision and extrusion in the transportation and installation laying processes, and particularly in the mining and other earthwork construction processes, the cable is easy to be damaged, so that the cable not only has great potential safety hazards, but also has the service life of the cable seriously shortened, and the use cost is increased.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model aims to provide a fire-retardant long-life cable wire of double-deck insulation shielding, it has effectively solved the problem that exists among the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the double-layer insulation shielding flame-retardant long-life cable wire comprises a cable body, wherein the cable body comprises a wire core bundle, a water-blocking layer, a heat dissipation layer, a shielding layer and a sheath layer which are sequentially arranged from inside to outside, the wire core bundle comprises four wire cores which are parallel to each other, the wire core comprises a wire, an inner insulating layer and an outer insulating layer which are sequentially coated outside the wire, and a halogen-free flame-retardant TPE is filled between the wire core bundle and the water-blocking layer; a crumple energy absorption mechanism is also arranged between the sheath layer and the shielding layer in a matching way;

the crumpling energy absorption mechanism comprises a plurality of crumpling energy absorption tubes which are uniformly distributed along the circumferential direction of the cross section of the cable body, each crumpling energy absorption tube comprises a tube body fixedly connected with the shielding layer and an elastic element arranged in the tube body, a sliding groove is formed in the circumferential surface of the tube body, a U-shaped contact piece is arranged in the sliding groove in a matched mode, and the upper side and the lower side of the U-shaped contact piece are fixedly connected with the sheath layer and the elastic element respectively; the crumpling energy-absorbing structure further comprises arc-shaped elastic supporting pieces symmetrically arranged on two sides of the crumpling energy-absorbing tube, the upper ends of the arc-shaped elastic supporting pieces are tightly abutted to the sheath layer, and the lower ends of the arc-shaped elastic supporting pieces are fixedly arranged on the shielding layer.

Furthermore, the inner insulating layer and the outer insulating layer are made of polyvinyl chloride and cross-linked polyethylene respectively.

Furthermore, the water-resistant layer is made of an aluminum-plastic composite bag.

Further, the heat dissipation layer includes inner circle, outer lane and sets firmly a plurality of radial backup pads between inner circle and outer lane, radial backup pad is along the cross section circumference evenly distributed on heat dissipation layer.

Furthermore, the inner ring, the outer ring and the radial support plate are all made of aluminum.

Further, the shielding layer is a wire mesh.

Further, the material of restrictive coating is TPU.

Further, the elastic element is a spring.

Furthermore, the arc-shaped elastic support sheet is made of rubber.

The utility model discloses following beneficial technological effect has:

the utility model discloses in used the energy-absorbing mechanism that contracts of ulcerate, can effectively absorb when the cable body receives external force and collides the extrusion and weaken the impact force to the core part of protection cable body is not damaged, has guaranteed the life of cable.

Drawings

Fig. 1 is a schematic plan view of an embodiment of the present invention;

fig. 2 is a partially enlarged view of a portion a in fig. 1.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-2, the double-layer insulation shielding flame-retardant long-life cable wire described in this embodiment includes a cable body 1, the cable body 1 includes a core bundle, a water-blocking layer 2, a heat dissipation layer 3, a shielding layer 4 and a sheath layer 5, which are sequentially disposed from inside to outside, the core bundle includes four core wires parallel to each other, the core wires include a wire 6, an inner insulation layer 7 covering the outside of the wire 6 and an outer insulation layer 8 covering the outside of the inner insulation layer 7, the inner insulation layer 7 and the outer insulation layer 8 are made of polyvinyl chloride and cross-linked polyethylene, the double-layer insulation layer is disposed to effectively ensure the insulation outside the wire 6, which is beneficial to safety, a halogen-free flame-retardant TPE9 is filled between the core bundle and the water-blocking layer 2, the halogen-free flame-retardant TPE9 has the characteristics of environmental protection and no toxicity, and has, importantly, the halogen-free flame-retardant TPE9 can be injection molded and recycled, does not need to be vulcanized, has excellent processing performance and can be conveniently filled between the wire core bundle and the water-blocking layer 2; a crumple energy absorption mechanism is also arranged between the sheath layer 5 and the shielding layer 4 in a matching way;

the crumpling energy absorption mechanism comprises a plurality of crumpling energy absorption tubes which are uniformly distributed along the circumferential direction of the cross section of the cable body 1, each crumpling energy absorption tube comprises a tube body 10 bonded with the shielding layer 4 and an elastic element 11 placed in the tube body 10, each elastic element 11 is a spring, a sliding groove 12 is formed in the circumferential surface of the tube body 10, a U-shaped contact piece 13 is arranged in each sliding groove 12 in a matched mode, two ends of each spring respectively abut against the bottom surface of the inner side of the tube body 10 and the lower surface of the U-shaped contact piece 13, and the upper side of each U-shaped contact piece 13 is; the crumpling energy-absorbing structure further comprises arc-shaped elastic supporting sheets 14 symmetrically arranged on two sides of the crumpling energy-absorbing tube, the arc-shaped elastic supporting sheets 14 are made of rubber, the upper ends of the arc-shaped elastic supporting sheets 14 are not fixedly connected with the sheathing layer 5 and only abut against the inner side of the sheathing layer 5, so that the sheathing layer 5 can smoothly sink and deform, the strokes of the sheathing layer 5 and the U-shaped contact piece 13 are ensured, the impact force is absorbed and weakened, and the lower ends of the arc-shaped elastic supporting sheets 14 are bonded on the shielding layer 4.

The water-resistant layer 2 is made of an aluminum-plastic composite bag, the heat dissipation layer 3 comprises an inner ring, an outer ring and a plurality of radial support plates which are integrally arranged or bonded between the inner ring and the outer ring, the radial support plates coincide with the diameter line of the cross section of the cable body 1, the structural strength of the cable body 1 is indirectly improved, the radial support plates are uniformly distributed along the circumferential direction of the cross section of the heat dissipation layer 3, a cavity which is communicated along the axial direction of the cable body 1 is formed between the adjacent radial support plates, outside air can flow in the cavity to take away heat generated by the lead 6, the temperature of the core part of the cable body 1 is prevented from being overhigh, the inner ring, the outer ring and the radial support plates are made of aluminum, the shielding layer 4 is made of a metal wire mesh, the sheath layer 5 is made of TPU, the wear resistance, the bearing capacity, the impact resistance and the damping performance of the TPU are, the present embodiment may also be used as a floor mopping cable wire.

The working principle of the embodiment is as follows:

when cable body 1 receives external force impact, external force acts on restrictive coating 5, restrictive coating 5 takes place the deformation that sinks, arc elasticity backing sheet 14 is further crooked under restrictive coating 5's effect, absorb the impact force and the energy storage in the bending process, and simultaneously, U-shaped contact piece 13 moves down along spout 12, the spring is compressed, absorb the impact force and the energy storage, the two mutually supports, effectively weaken the impact force that acts on wire 6 and inner insulation layer 7 and outer insulation layer 8, guarantee cable body 1's normal work, the security in the cable course of the work has both been improved and the life of cable has been guaranteed, external force disappears the back, restrictive coating 5 resumes original shape backing sheet under the effect of arc elasticity backing sheet 14 and spring.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The double-layer insulation shielding flame-retardant long-life cable wire comprises a cable body and is characterized in that the cable body comprises a wire core bundle, a water-blocking layer, a heat dissipation layer, a shielding layer and a sheath layer which are sequentially arranged from inside to outside, wherein the wire core bundle comprises four wire cores which are parallel to each other, the wire cores comprise wires, and an inner insulating layer and an outer insulating layer which are sequentially coated outside the wires, and a halogen-free flame-retardant TPE is filled between the wire core bundle and the water-blocking layer; a crumple energy absorption mechanism is also arranged between the sheath layer and the shielding layer in a matching way;

2. The double-layer insulation shielding flame-retardant long-life cable and wire as claimed in claim 1, wherein the inner insulation layer and the outer insulation layer are made of polyvinyl chloride and crosslinked polyethylene, respectively.

3. The double-layer insulation shielding flame-retardant long-life cable and wire as claimed in claim 1, wherein the water-blocking layer is made of an aluminum-plastic composite bag.

4. The double-layer insulation-shielding flame-retardant long-life cable wire according to claim 1, wherein the heat dissipation layer comprises an inner ring, an outer ring and a plurality of radial support plates fixedly arranged between the inner ring and the outer ring, and the radial support plates are uniformly distributed along the circumferential direction of the cross section of the heat dissipation layer.

5. The double-layer insulation shielding flame-retardant long-life cable and wire as claimed in claim 4, wherein the inner ring, the outer ring and the radial support plate are made of aluminum.

6. The double layer insulated shielded flame retardant long life cable wire of claim 1 wherein said shield is a wire mesh.

7. The double-layer insulation shielding flame-retardant long-life cable and wire as claimed in claim 1, wherein the sheath layer is made of TPU.

8. The double layer insulation shielding flame retardant long life cable wire of claim 1 wherein said resilient member is a spring.

9. The double-layer insulation shielding flame-retardant long-life cable wire as claimed in claim 1, wherein the arc-shaped elastic support sheet is made of rubber.