CN212010526U

CN212010526U - Flexible foamed fluororesin insulation multi-core cable

Info

Publication number: CN212010526U
Application number: CN202020825811.6U
Authority: CN
Inventors: 高旭皓; 江平; 黄建卫; 王成旺; 王毅; 王登峰; 邵千俊
Original assignee: Zhejiang Products Zhongda Cable Co ltd; Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Current assignee: Zhejiang Products Zhongda Cable Co ltd; Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2020-11-24
Anticipated expiration: 2030-05-18

Abstract

The utility model discloses an insulating multicore cable of flexible foaming fluororesin, constitute the cable core including four insulating coaxial sinle silk concentric twists of foaming fluororesin, the outside cladding in proper order of cable core has fluororesin to wind band layer, shielding layer is woven to first metal, PTFE winds covering and oversheath outward, the insulating coaxial sinle silk of foaming fluororesin includes that inner conductor and inner conductor outside have in proper order the cladding around the covering in PTFE, foaming fluororesin area is around covering insulating layer, shielding layer and fluororesin outer insulating layer are woven to the second metal, the inner conductor is the concentric compound hank constitution of a plurality of strands, the strand is that a plurality of diameters are 0.02mm to 0.05mm tin-plated copper monofilament bunch hank and constitutes, bunch hank to and compound hank to the same, bunch hank pitch is less than compound hank pitch, inner conductor external diameter is 8 to 40 times of strand external diameter. The multi-core cable has better flexibility, bending resistance and torsion resistance, the attenuation of high-frequency signals is reduced, and the multi-core cable is durable in use.

Description

Flexible foamed fluororesin insulation multi-core cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to an insulating multicore cable of flexible foaming fluororesin.

Background

In an automatic industrial production line, a multi-core cable is generally used for a towline system, a robot, a mobile driving system and the like, and under the trend that industrial machine equipment tends to be miniaturized, the multi-core cable also develops towards the direction of thinning and flexibility, which puts higher requirements on the multi-core cable. However, in industrial applications, the environment is complicated, the attenuation of high-frequency signals is large, and a general multi-core cable is poor in bending resistance, and after repeated bending and twisting, the disconnection phenomenon is likely to occur, the shielding effect is unstable, the transmission characteristic of high-frequency signals is poor, and the cable is not durable.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, the technical problem that solve provides an insulating multicore cable of flexible foaming fluororesin, has better pliability, bending resistance and antitorque commentaries on classics characteristic concurrently, and high frequency signal decay reduces, durable use.

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

A flexible foamed fluororesin insulation multi-core cable comprises four foamed fluororesin insulation coaxial cable cores which are concentrically twisted to form a cable core, wherein the outside of the cable core is sequentially wrapped with a fluororesin winding band layer, a first metal braided shielding layer, a PTFE outer winding layer and an outer sheath, the foamed fluororesin insulation coaxial cable cores comprise an inner conductor, the outside of the inner conductor is sequentially wrapped with a PTFE inner winding layer, a foamed fluororesin belt winding insulating layer, a second metal braided shielding layer and a fluororesin outer insulating layer, the inner conductor is formed by concentrically and repeatedly twisting a plurality of strands, the strands are formed by twisting a plurality of tinned copper monofilaments with the diameters of 0.02mm to 0.05mm, the strand twisting direction is the same as the repeated twisting direction, the strand twisting distance is smaller than the repeated twisting distance, and the outer diameter of the inner conductor is 8 to 40 times of the outer diameter of the strands.

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

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

Preferably, the first metal braided shielding layer and the second metal braided shielding layer are formed by weaving inner layer tin-plated copper monofilaments and outer layer tin-plated copper monofilaments in a reverse spiral winding mode, and the diameter of each inner layer tin-plated copper monofilament is smaller than that of each outer layer tin-plated copper monofilament.

Preferably, the diameters of the inner layer tin-plated copper monofilament and the outer layer tin-plated copper monofilament are both 0.05mm to 0.1 mm.

Preferably, the winding angle is 15 to 35 degrees.

Preferably, the PTFE outer wrapping layer is of a lap-covering wrapping structure.

Preferably, the fluororesin wrapping tape layer is of a gap wrapping structure.

Preferably, the outer sheath is a PVC or PE sheath.

Preferably, the outer sheath has a thickness of 0.5mm to 1.8 mm.

The utility model has the advantages that:

1. the PTFE inner wrapping layer is coated outside the inner conductor, so that the flexibility is increased, the bending resistance and the torsion resistance are improved, and the good electrical property and the small-diameter manufacturing can be realized at the same time. The PTFE inner wrapping layer is coated with the foamed fluororesin tape wrapping insulating layer, the foamed fluororesin tape wrapping insulating layer can reduce dielectric constant and dielectric loss, reduce capacitance and attenuation of the cable, realize miniaturization and lightweight manufacturing of the cable, improve sliding property between the insulating layer and the inner conductor, reduce local stress concentration of the inner conductor, reduce torque force, improve bending resistance and torsion resistance, and have better durability.

2. The metal braided shielding layer is formed by weaving the inner layer tinned copper monofilament and the outer layer tinned copper monofilament in a reverse spiral winding mode, the diameter of the inner layer tinned copper monofilament is smaller than that of the outer layer tinned copper monofilament, the flexibility of the cable is improved, the braiding density of the inner layer tinned copper monofilament is large, the internal high-frequency signal is prevented from leaking to the outside, the electrical resistance of the outer layer tinned copper monofilament is small, and the interference from external signals is suppressed. And, the diameter of the inner layer tinned copper monofilament is different from that of the outer layer tinned copper monofilament, so that the weaving gap can be effectively reduced, the friction phenomenon generated between the tinned copper monofilaments is greatly reduced, the noise shielding characteristic is improved, the flexibility and the torsion resistance of the cable are increased, and the phenomenon of wire breakage is not easy to occur.

3. The tinned copper monofilament with the diameter of 0.02mm to 0.05mm has the tensile strength of more than 330MPa and the elongation of more than 5 percent, so that the inner conductor has better flexibility and electrical characteristics, the bundle twisting direction of the tinned copper monofilament is the same as the complex twisting direction of the plied yarn, the bending resistance and the torsion resistance are improved, the durability is better, and the bundle twisting pitch is smaller than the complex twisting pitch, so that the bending resistance and the torsion resistance are enhanced, and the thin-diameter and light-weight cable is facilitated to be manufactured.

Drawings

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

fig. 2 is a schematic cross-sectional structure view of a foamed fluororesin insulated coaxial core according to an embodiment of the present application.

In the figure: the cable comprises a 1-foamed fluororesin insulated coaxial cable core, a 2-fluororesin winding and wrapping layer, a 3-first metal braided shielding layer, a 4-PTFE outer winding and wrapping layer, a 5-outer sheath, an 11-inner conductor, a 12-PTFE inner winding and wrapping layer, a 13-foamed fluororesin winding and wrapping insulating layer, a 14-second metal braided shielding layer and a 15-fluororesin outer insulating layer.

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 flexible foaming fluororesin insulation multicore cable, constitute the cable core including four foaming fluororesin insulation coaxial core 1 concentric twists, as shown in fig. 2, foaming fluororesin insulation coaxial core 1 includes inner conductor 11 and inner conductor 11 outside in proper order the cladding have in the PTFE around covering 12, foaming fluororesin area around package insulating layer 13, second metal weave shielding layer 14 and fluororesin outer insulating layer 15, inner conductor 11 constitutes for the concentric compound hank of a plurality of strands, the strand is that a plurality of diameters are 0.02mm to 0.05mm tin-plated copper monofilament bundle hank constitutes, bundle hank to with compound hank is the same, bundle hank pitch is less than compound hank pitch, inner conductor 11 external diameter does 8 to 40 times of strand external diameter. In one embodiment, the foamed fluororesin tape wrapping insulating layer 13 is a foamed PFA tape multi-layer wrapping structure. The fluororesin outer insulating layer 15 is, for example, an FEP, PFA or ETFE resin layer.

The cable core is coated with a fluororesin winding band layer 2, a first metal woven shielding layer 3, a PTFE outer winding layer 4 and an outer sheath 5 in sequence, specifically, the fluororesin winding band layer 2 can adopt an FEP, PFA or ETFE resin layer, and further, the fluororesin winding band layer 2 is of a gap winding structure. The PTFE outer wrapping layer 4 preferably adopts a lapping and wrapping structure. The outer sheath 5 is made of, for example, PVC or PE, and further, the thickness of the outer sheath 5 is 0.5mm to 1.8 mm.

Specifically, the first metal braided shield layer 3 and the second metal braided shield layer 14 are formed by weaving inner layer tin-plated copper monofilaments and outer layer tin-plated copper monofilaments in a reverse spiral winding manner, and the diameter of each inner layer tin-plated copper monofilament is smaller than that of each outer layer tin-plated copper monofilament. Further, the diameters of the inner layer tin-plated copper monofilament and the outer layer tin-plated copper monofilament are both 0.05mm to 0.1 mm. Further, the winding angle is 15 to 35 degrees.

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

1. Flexible foaming fluororesin insulation multicore cable, characterized by: comprises four foamed fluororesin insulation coaxial wire cores (1) which are concentrically twisted to form a cable core, a fluororesin winding band layer (2), a first metal braided shielding layer (3), a PTFE outer winding layer (4) and an outer sheath (5) are sequentially coated outside the cable core, the foamed fluororesin insulation coaxial cable core (1) comprises an inner conductor (11), a PTFE inner wrapping layer (12), a foamed fluororesin belt wrapping insulating layer (13), a second metal braided shielding layer (14) and a fluororesin outer insulating layer (15) are sequentially wrapped outside the inner conductor (11), the inner conductor (11) is formed by concentrically twisting a plurality of folded yarns, the folded yarns are formed by bundling and twisting a plurality of tinned copper monofilaments with the diameter of 0.02mm to 0.05mm, the bundle twisting direction is the same as the complex twisting direction, the bundle twisting pitch is smaller than the complex twisting pitch, and the outer diameter of the inner conductor (11) is 8-40 times of that of the strand.

2. The flexible foamed fluororesin insulated multi-core cable according to claim 1, characterized in that: the foamed fluororesin belt winding insulating layer (13) is of a foamed PFA resin belt multi-layer winding structure.

3. The flexible foamed fluororesin insulated multi-core cable according to claim 1, characterized in that: the fluororesin wrapping tape layer (2) and the fluororesin outer insulating layer (15) are FEP, PFA or ETFE resin layers.

4. The flexible foamed fluororesin insulated multi-core cable according to claim 1, characterized in that: the first metal braided shielding layer (3) and the second metal braided shielding layer (14) are formed by weaving inner-layer tinned copper monofilaments and outer-layer tinned copper monofilaments in a reverse spiral winding mode, and the diameters of the inner-layer tinned copper monofilaments are smaller than those of the outer-layer tinned copper monofilaments.

5. The flexible foamed fluororesin insulated multi-core cable according to claim 4, wherein: the diameters of the inner layer tin-plated copper monofilament and the outer layer tin-plated copper monofilament are both 0.05mm to 0.1 mm.

6. The flexible foamed fluororesin insulated multi-core cable according to claim 4, wherein: the winding angle is 15 to 35 degrees.

7. The flexible foamed fluororesin insulated multi-core cable according to claim 1, characterized in that: the PTFE outer wrapping layer (4) is of a lapping and wrapping structure.

8. The flexible foamed fluororesin insulated multi-core cable according to claim 1, characterized in that: the fluororesin wrapping band layer (2) is of a gap wrapping structure.

9. The flexible foamed fluororesin insulated multi-core cable according to claim 1, characterized in that: the outer sheath (5) is a PVC or PE sheath.

10. The flexible foamed fluororesin insulated multi-core cable according to claim 1, characterized in that: the thickness of the outer sheath (5) is 0.5mm to 1.8 mm.