CN212010428U - Tensile-resistant type shielding flat cable - Google Patents

Abstract

The utility model discloses a flat cable is shielded to stretching resistance type, including two insulating pair twist sinle silks, four insulating coaxial sinle silks and two tensile steel strand wires, two insulating pair twist sinle silks are located the centre and the left and right sides symmetry sets up four insulating coaxial sinle silks and forms the cable core jointly, the outside cladding polyvinyl chloride foaming layer of cable core, two tensile steel strand wires symmetry set up in polyvinyl chloride foaming layer left and right sides and common cladding butyronitrile polyvinyl chloride oversheath, insulating pair twist sinle silk includes that sinle silk and fluororesin that two insulating sinle silks constitute wind band layer, copper line shield winding layer and outer insulating layer, insulating sinle silk includes inner conductor and inner insulating layer, insulating coaxial sinle silk includes that central conductor and central conductor outside cladding in proper order have the foaming fluororesin area to wind a packet insulating layer, the fluororesin area is around packet antifriction layer, metal shielding layer and PTFE around the covering. The flat cable has strong tensile resistance and better bending resistance, and effectively improves the safety and reliability.

Description

Tensile-resistant type shielding flat cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a flat cable of stretching resistance type shielding.

Background

The flat cable is suitable for power transmission lines for fixed laying or connecting cables for mobile electric appliances with the alternating current rated voltage of 0.6/1KV and below, has the characteristics of flexible cable structure, easy arrangement, flexibility, no knotting in bending and the like, has stable electrical performance in high-temperature and high-cold environments, outstanding ageing resistance and long service life, and is widely applied to industries such as metallurgy, electric power, petrifaction, electronics, automobile manufacturing and the like. In the flat cable with the steel wire bearing cable core, due to the fact that large mechanical impact tension is borne, local stress is concentrated at two end parts of the section of the flat cable in the long axial direction, mechanical strength is low, when the flat cable is bent, the steel stranded wires arranged at two ends can deflect towards the inner side of the insulated wire core, stress is concentrated on the insulated wire core, the insulated wire core is easy to damage, and the safety and reliability of the flat cable are affected.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, the technical problem that solve provides a flat cable of stretching resistance type shielding, and the stretching resistance effect is strong, and bending resistance is better, effectively improves the fail safe nature of flat cable.

The utility model discloses a make above-mentioned technical problem solve through following technical scheme.

Tensile-resistant type shielded flat cable comprises two insulating twisted-pair cable cores, four insulating coaxial cable cores and two tensile steel strands, wherein the two insulating twisted-pair cable cores are arranged in a row, the axes of the two insulating twisted-pair cable cores are located on the same plane, the two insulating twisted-pair cable cores are symmetrically arranged in the middle and symmetrically arranged on the left side and the right side of the cable core, the four insulating coaxial cable cores jointly form the cable core, the outer portion of the cable core is wrapped with a polyvinyl chloride foaming layer, the two tensile steel strands are symmetrically arranged on the left side and the right side of the polyvinyl chloride foaming layer and jointly wrap a butyronitrile polyvinyl chloride outer sheath, the insulating twisted-pair cable core comprises a cable core body formed by twisting the two insulating twisted-pair cable cores, the outer portion of the cable core is sequentially wrapped with a fluororesin winding layer, a copper wire shielding winding layer and an outer insulating layer, the insulating cable, The fluororesin tape is around covering antifriction layer, metal shielding layer and PTFE around covering.

Preferably, the two tensile steel strands are twisted in opposite directions.

Preferably, the tensile steel strand is a galvanized steel wire or a stainless steel strand.

Preferably, the inner conductor and the central conductor are both formed by tinned copper monofilament bunches.

Preferably, the foamed fluororesin tape winding insulating layer is of a foamed PFA resin tape multi-layer winding structure.

Preferably, the fluororesin wrapping tape layer, the outer insulating layer, the fluororesin tape wrapping antifriction layer, and the inner insulating layer are FEP, PFA, or ETFE resin layers.

Preferably, the metal shielding layer is formed by weaving an inner layer tin-plated copper monofilament and an outer layer tin-plated copper monofilament which are reversely spirally wound, and the diameter of the inner layer tin-plated copper monofilament is smaller than that of the outer layer tin-plated copper monofilament.

Preferably, the copper wire shielding winding layer is formed by mixing two tinned copper monofilaments with different diameters and the diameter ratio of the tinned copper monofilaments is between 0.9 and 1 in a unidirectional spiral winding mode.

Preferably, the fluorine resin belt lapping antifriction layer is a fluorine resin belt one-way spiral lapping cover lapping structure.

Preferably, the thickness ratio of the polyvinyl chloride foaming layer to the butyronitrile polyvinyl chloride outer sheath is 1:1 to 1: 2.5.

The utility model has the advantages that:

1. through at two insulating pair twist sinle silks and the common cladding polyvinyl chloride foaming layer in four insulating coaxial sinle silks outside, then with two common cladding butyronitrile polyvinyl chloride oversheath of tensile steel strand wires, make and keep two-layer resin layer interval between tensile steel strand wires and the adjacent insulating coaxial sinle silk, slow down the long axial both ends local stress concentration of flat cable section and reinforcing mechanical strength, the stretching resistance performance has been improved greatly, when flat cable is crooked, can effectually avoid the steel strand wires to squint towards adjacent insulating coaxial sinle silk, eliminate the potential safety hazard of damaging insulating coaxial sinle silk, ensure the long-term fail safe nature of using of flat cable.

2. The twisting directions of the two tensile steel strands are opposite, so that the torque force can be reduced and the safety and reliability can be improved in the process of bending and twisting the cable.

3. The butyronitrile polyvinyl chloride outer sheath is a reinforcing structure of a polyvinyl chloride foaming layer, has higher tensile strength and elongation, is not easy to tear after being bent and twisted for a long time, effectively protects the polyvinyl chloride foaming layer, and is beneficial to improving the bending resistance and the torsion resistance.

Drawings

FIG. 1 is a schematic cross-sectional structural view of an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of an insulated twisted pair core according to an embodiment of the present application;

fig. 3 is a schematic cross-sectional structure view of an insulated coaxial cable core according to an embodiment of the present application.

In the figure: 1-an insulated twisted-pair wire core, 11-an insulated wire core, 111-an inner conductor, 112-an inner insulating layer, 12-a fluororesin wrapped tape layer, 13-a copper wire shielding wound layer, 14-an outer insulating layer, 2-an insulated coaxial wire core, 21-a central conductor, 22-a foamed fluororesin tape wrapped insulating layer, 23-a fluororesin tape wrapped antifriction layer, 24-a metal shielding layer, 25-a PTFE wrapped layer, 3-a tensile steel strand, 4-a polyvinyl chloride foamed layer and 5-a butyronitrile polyvinyl chloride outer sheath.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses flat cable is shielded to stretching resistance type, including being one row of arranging and the axis is located coplanar two insulation pair twist sinle silks 1, four insulation coaxial sinle silks 2 and two tensile steel strand wires 3, two insulation pair twist sinle silks 1 are located the centre and the left and right sides symmetry sets up four insulation coaxial sinle silks 2 form the cable core jointly, the outside cladding of cable core has polyvinyl chloride foaming layer 4, two tensile steel strand wires 3 symmetries set up 4 left and right sides and common cladding butyronitrile polyvinyl chloride oversheath 5 on polyvinyl chloride foaming layer. Preferably, the two tensile steel strands 3 are twisted in opposite directions. The tensile steel strand 3 is made of, for example, galvanized steel wire or stainless steel wire. The thickness ratio of the polyvinyl chloride foam layer 4 to the butyronitrile polyvinyl chloride outer sheath 5 is preferably 1:1 to 1: 2.5.

As shown in fig. 2, the insulated twisted-pair cable core 1 includes a cable core body formed by twisting two insulated cable cores 11 in pairs, and the cable core body is sequentially coated with a fluororesin wrapping tape layer 12, a copper wire shielding wrapping layer 13 and an outer insulating layer 14, the insulated cable core 11 includes an inner conductor 111 and an inner insulating layer 112, and specifically, the inner conductor 111 is formed by tinned copper monofilament bundle twisting. In one embodiment, the copper wire shield wrap 13 is formed by a hybrid unidirectional spiral winding of two tinned copper monofilaments with different diameters and a diameter ratio of between 0.9 and 1.

As shown in fig. 3, the insulated coaxial cable core 2 includes a central conductor 21 and a foamed fluororesin tape wrapped insulating layer 22, a fluororesin tape wrapped anti-friction layer 23, a metal shielding layer 24 and a PTFE wrapped layer 25 sequentially coated outside the central conductor 21. The central conductor 21 is formed by twisting a tin-plated copper monofilament. In one embodiment, the foamed fluororesin tape wrapping insulating layer 22 is a foamed PFA tape multi-layer wrapping structure. In one embodiment, the metallic shielding layer 24 is formed by weaving inner and outer tinned copper monofilaments in a reverse spiral winding manner, wherein the diameter of the inner tinned copper monofilament is smaller than that of the outer tinned copper monofilament. In one embodiment, the fluororesin tape wrapped antifriction layer 23 is a fluororesin tape unidirectional spiral lapping and wrapping structure.

Preferably, the fluororesin wrapping band layer 12, the outer insulation layer 14, the fluororesin wrapping antifriction layer 23 and the inner insulation layer 112 are FEP, PFA or ETFE resin layers.

While the invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the claims of the present application belong to the protection scope of the present invention.

Claims (10)

1. Tensile-resistant type shielding flat cable, characterized by: the cable comprises two insulating twisted-pair cable cores (1), four insulating coaxial cable cores (2) and two tensile steel strands (3), wherein the two insulating twisted-pair cable cores (1) are arranged in a row, the axes of the two insulating twisted-pair cable cores are positioned on the same plane, the four insulating coaxial cable cores (2) are symmetrically arranged on the left side and the right side of the middle of the two insulating twisted-pair cable cores (1), the four insulating twisted-pair cable cores (2) jointly form a cable core, the outer portion of the cable core is wrapped with a polyvinyl chloride foaming layer (4), the two tensile steel strands (3) are symmetrically arranged on the left side and the right side of the polyvinyl chloride foaming layer (4) and are commonly wrapped with a butyronitrile polyvinyl chloride outer sheath (5), the insulating twisted-pair cable cores (1) comprise two insulating cable cores (11), a cable core body formed by twisting the two insulating cable cores (11) is sequentially wrapped with a fluororesin wrapping layer (12), a, insulating coaxial sinle silk (2) reach including central conductor (21) outside cladding in proper order has the foaming fluorine resin area to wrap around insulating layer (22), fluorine resin area around package antifriction layer (23), metal shielding layer (24) and PTFE around package (25).

2. The tension resistant flat shielded cable of claim 1 wherein: the twisting directions of the two tensile steel strands (3) are opposite.

3. The tension resistant flat shielded cable of claim 2 wherein: the tensile steel strand (3) is a galvanized steel wire or a stainless steel strand.

4. The tension resistant flat shielded cable of claim 1 wherein: the inner conductor (111) and the central conductor (21) are both formed by tinned copper monofilament bunches.

5. The tension resistant flat shielded cable of claim 1 wherein: the foamed fluororesin belt wrapping insulating layer (22) is of a foamed PFA resin belt multi-layer wrapping structure.

6. The tension resistant flat shielded cable of claim 1 wherein: the fluororesin wrapping band layer (12), the outer insulating layer (14), the fluororesin wrapping antifriction layer (23) and the inner insulating layer (112) are all made of FEP, PFA or ETFE resin layers.

7. The tension resistant flat shielded cable of claim 1 wherein: the metal shielding layer (24) is formed by weaving an inner layer tin-plated copper monofilament and an outer layer tin-plated copper monofilament which are reversely spirally wound, and the diameter of the inner layer tin-plated copper monofilament is smaller than that of the outer layer tin-plated copper monofilament.

8. The tension resistant flat shielded cable of claim 1 wherein: the copper wire shielding winding layer (13) is formed by mixing two tinned copper monofilaments with different diameters and the diameter ratio of 0.9-1 in a one-way spiral winding mode.

9. The tension resistant flat shielded cable of claim 1 wherein: the fluorine resin belt lapping antifriction layer (23) is a fluorine resin belt one-way spiral lapping cover lapping structure.

10. The tension resistant flat shielded cable of claim 1 wherein: the thickness ratio of the polyvinyl chloride foaming layer (4) to the butyronitrile polyvinyl chloride outer sheath (5) is 1:1 to 1: 2.5.

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