CN213339796U

CN213339796U - High-low temperature resistant composite cable

Info

Publication number: CN213339796U
Application number: CN202022344793.2U
Authority: CN
Inventors: 车泳余
Original assignee: Shenzhen Zhengwei Cable Manufacturing Co ltd
Current assignee: Shenzhen Beiwei Electronics Co.,Ltd.
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-06-01
Anticipated expiration: 2030-10-20

Abstract

The utility model relates to the technical field of insulated cables, in particular to a composite high and low temperature resistant cable, which comprises a copper conductor, an inner insulating layer, a shielding layer, an outer insulating layer, an outer sheath layer and a sliding sheath from inside to outside in sequence, wherein a polytetrafluoroethylene layer is also arranged between the copper conductor and the inner insulating layer, and the inner insulating layer is a hollow fiber layer; be equipped with the slip recess along the cable axis direction on the oversheath layer, be equipped with on the slip sheath inner wall with slip recess complex slip arch, the slip sheath passes through slip arch and the slip recess sliding connection on the oversheath layer together, and the lateral wall of slip sheath is square plane to this solves the cable and buckles the department and easily wears and teares, leads to the cable to damage, influences the problem of power supply, the utility model discloses mainly used large-scale mill.

Description

High-low temperature resistant composite cable

Technical Field

The utility model relates to an insulated cable technical field, concretely relates to resistant high low temperature cable of combined material.

Background

With the rapid development of communication technology, sometimes the cable needs to work in some severe temperature environments for power transmission, so the performance requirements for high temperature and low temperature resistance of the cable are relatively high.

The existing cable sequentially comprises a copper conductor, an inner insulating layer, a shielding layer, an outer insulating layer and an outer sheath layer from inside to outside, wherein the inner insulating layer wraps the copper conductor, the shielding layer wraps the insulating layer, the outer insulating layer wraps the shielding layer, and the outer sheath layer wraps the outer insulating layer. However, the inner insulating layer is often poor in high temperature resistance, and when the heat generated by excessive current flowing through the conductor is large, the heat easily burns the insulating layer, so that the cable cannot work normally, and even more, the cable directly damages equipment.

And the cable often can meet when buckling when laying, the part of buckling this moment often receives the extrusion force great, if its department of buckling still produces the friction with wall, ground or gallery department to there is not fixing device to fix the department of buckling again, then cable department of buckling often just can be worn out in its overcoat layer in long-time friction very likely, leads to whole cable damage at last, influences the problem of power supply.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high low temperature resistant cable of combined material solves the cable department of buckling and very easily wears and teares, leads to the cable to damage, influences the problem of power supply.

In order to solve the technical problem, the utility model discloses a basic scheme as follows:

a composite high and low temperature resistant cable comprises a copper conductor, an inner insulating layer, a shielding layer, an outer insulating layer, an outer sheath layer and a sliding sheath from inside to outside in sequence, wherein a polytetrafluoroethylene layer is further arranged between the copper conductor and the inner insulating layer, and the inner insulating layer is a hollow fiber layer;

the cable is characterized in that a sliding groove is formed in the outer sheath layer along the axis direction of the cable, a sliding protrusion matched with the sliding groove is arranged on the inner wall of the sliding sheath, the sliding sheath is connected with the sliding groove in the outer sheath layer in a sliding mode through the sliding protrusion, and the outer side wall of the sliding sheath is a square plane.

Furthermore, the slip sheath comprises upper slip sheath and lower slip sheath of symmetry from top to bottom respectively, and upper slip sheath and lower slip sheath inner wall all are equipped with the slip arch with slip recess sliding connection.

Furthermore, the opposite surfaces of the upper sliding sheath and the lower sliding sheath are symmetrically provided with connecting through holes.

Furthermore, connecting through holes are symmetrically formed in four corners of the opposite side of the upper sliding sheath and the lower sliding sheath.

Further, the inner insulating layer is a hollow fiber layer which is wrapped outside the polytetrafluoroethylene layer and consists of a plurality of hollow fibers.

Further, the copper conductor comprises a copper core, a polyethylene insulating layer, a second shielding layer and a protective layer from inside to outside in sequence.

This scheme has high temperature resistance good characteristic through polytetrafluoroethylene, can play the inside copper conductor of protection and not receive external high temperature environment's influence, the heat that produces when the while is circular telegram again can effectual absorption copper conductor, make the heat can not transmitted for the insulating layer, thereby the effectual internal insulation layer that has protected, thereby make the holistic high temperature resistance characteristic of cable obtain promoting, and hollow fiber is neutral, not only good electrical insulator, and relatively insensitive to the external temperature, consequently, make the cable not only can be under high temperature normal use but also can be under high temperature normal use with the polytetrafluoroethylene cooperation.

And through the oversheath layer sliding connection of slip sheath and cable in this scheme, when the cable need buckle, can slide the sheath to the department of buckling, to the department of buckling realization thickening, the department of buckling of thickening, if the phenomenon such as wearing and tearing must at first can wear and tear the slip sheath, and the slip sheath is sliding connection on the oversheath layer, be convenient for tear open and change, consequently needn't change whole cable again because the department of buckling wearing and tearing, not only labour saving and time saving, and economic cost is low to this just can solve the cable and buckle the department and easily wear and tear, lead to the cable to damage, influence the problem of power supply. And the lateral wall of the sliding sheath is a square plane, and compared with a line friction mode at the corner of the bent part, the sliding sheath is replaced by the square plane, so that the friction area is increased, the abrasion degree caused by friction is reduced, and after the friction area is increased by the square plane, the friction force at the bent part is increased, so that the bent part is not easy to move, the friction between the bent part and the outside is reduced, and the service life of the sliding sheath is prolonged.

In addition, the side of the bending part which is pulled is more easily worn when the cable is bent, so that through the design of the upper sliding sheath and the lower sliding sheath, only one of the upper sliding sheath or the lower sliding sheath needs to be slid to cover the bending part on the side which is pulled, and the extruded side also takes the bending convenience into consideration, so that the sliding sheath is not needed to cover the side which is extruded. In this way, the wear-resisting property of the bent part of the cable is better, and the bending convenience of the original cable is kept.

And the upper sliding sheath and the lower sliding sheath are provided with connecting through holes, the connecting through holes aligned with the upper sliding sheath and the lower sliding sheath can be connected and fixed on the outer sheath layer by using bolts, and when the bent part is only protected by using the upper sliding sheath, the connecting through holes of the lower sliding sheath and the upper sliding sheath can be connected in a staggered mode by using bolts, so that the position of the side, extruded by the bent part of the cable can be reserved, and the fixing of the sliding sheath on the bent part can be realized.

Drawings

Fig. 1 is a front view of an embodiment of a composite high and low temperature resistant cable according to the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a connection schematic diagram of the upper sliding sheath and the lower sliding sheath in the embodiment of the high and low temperature resistant composite cable at the cable bending part.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the copper core comprises a copper core 1, a polyethylene insulating layer 2, a second shielding layer 3, a protective layer 4, a polytetrafluoroethylene layer 5, an inner insulating layer 6, a shielding layer 7, an outer insulating layer 8, an outer sheath layer 9, a lower sliding sheath 10, a connecting through hole 11, an upper sliding sheath 12 and a sliding protrusion 13.

The embodiments are substantially as shown in figures 1 to 3 of the accompanying drawings: a composite high and low temperature resistant cable comprises a copper conductor, a polytetrafluoroethylene layer 5, an inner insulating layer 6, a shielding layer 7, an outer insulating layer 8, an outer sheath layer 9 and a sliding sheath from inside to outside in sequence; the copper conductor comprises a copper core 1, a polyethylene insulating layer 2, a second shielding layer 3 and a protective layer 4 from inside to outside in sequence. The inner insulating layer 6 is a hollow fiber layer which is wrapped outside the polytetrafluoroethylene layer 5 and consists of a plurality of hollow fibers, the shielding layer 7 and the second shielding layer 3 are both metallized paper, the outer insulating layer 8 is filled with a polyethylene material, and the outer sheath layer 9, the sliding sheath and the protective layer 4 are all made of thermoplastic polyurethane elastomer rubber materials.

Be equipped with the slip recess along the cable axis direction on the oversheath layer 9, be equipped with on the slip sheath inner wall with slip recess complex slip arch 13, the slip sheath is in the same place through slip protruding 13 and the slip recess sliding connection on the oversheath layer 9, and the slip sheath comprises upper sliding sheath 12 and lower sliding sheath 10 of symmetry from top to bottom respectively, and upper sliding sheath 12 and lower sliding sheath 10 inner wall all be equipped with slip recess sliding connection's slip arch 13, and the lateral wall of slip sheath is square plane.

The opposite surfaces of the upper sliding sheath 12 and the lower sliding sheath 10 are symmetrically provided with connecting through holes 11, and the connecting through holes 11 are arranged at four corners of the square plane of the upper sliding sheath 12 and the lower sliding sheath 10.

The specific implementation process is as follows:

the number of the sliding sheaths can be added according to the using length of the cable, in the embodiment, one sliding sheath is arranged every five meters, namely, a cable with five meters in length is arranged at the head end and the tail end of the cable, when the cable is used and the cable needs to be bent, the sliding sheath which is positioned at the nearest side of the stretching surface of the bent part is selected, in the embodiment, the upper sliding sheath 12 is used as the sliding sheath positioned at the side of the stretching surface of the bent part and slides to the bent part to wrap the outer sheath layer 9 at the bent part, two lower sliding sheaths 10 of the cable with five meters in length are slid to the positions which are closest to the connecting through holes 11 of the upper sliding sheath 12 at the bent part and are respectively positioned at the front side and the rear side of the upper sliding sheath 12, and the two connecting through holes 11 at the rear side of the lower sliding sheath 10 positioned at the front side of the upper sliding sheath 12 are aligned with the two connecting through holes 11, meanwhile, the two front connecting through holes 11 of the lower sliding sheath 10 positioned at the rear side of the upper sliding sheath 12 are aligned with the two rear connecting through holes 11 of the upper sliding sheath 12, that is, the connecting through holes 11 of the upper sliding sheath 12 and the lower sliding sheath 10 are aligned in a front-to-back staggered manner.

At this time, the upper sliding sheath 12 and the lower sliding sheath 10 can be fixedly connected by the connecting through hole 11 which is aligned in a staggered manner by using a matched bolt, so that the sliding phenomenon of the upper sliding sheath 12 and the lower sliding sheath 10 is prevented when the device is used.

The above description is only for the embodiments of the present invention, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein too much, and those skilled in the art will know all the common technical knowledge in the technical field of the present invention before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the schemes, and some typical known structures or known methods should not become obstacles for those skilled in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims should be determined by the content of the claims, and the description of the specific embodiments and the like in the specification should be used for explaining the content of the claims.

Claims

1. The utility model provides a resistant high low temperature cable of combined material, includes copper conductor, inner insulating layer, shielding layer, outer insulating layer, oversheath layer and slip sheath from inside to outside in proper order, its characterized in that: a polytetrafluoroethylene layer is further arranged between the copper wire and the inner insulating layer, and the inner insulating layer is a hollow fiber layer;

2. The composite high and low temperature resistant cable according to claim 1, wherein: the sliding sheath is composed of an upper sliding sheath and a lower sliding sheath which are symmetrical up and down, and sliding protrusions which are connected with the sliding grooves in a sliding mode are arranged on the inner walls of the upper sliding sheath and the lower sliding sheath.

3. The composite high and low temperature resistant cable according to claim 2, wherein: and connecting through holes are symmetrically formed in the opposite surfaces of the upper sliding sheath and the lower sliding sheath.

4. A composite high and low temperature resistant cable according to claim 3, wherein: and the four corners of the opposite surfaces of the upper sliding sheath and the lower sliding sheath are symmetrically provided with connecting through holes.

5. The composite high and low temperature resistant cable according to claim 1, wherein: the inner insulating layer is a hollow fiber layer which is wrapped outside the polytetrafluoroethylene layer and consists of a plurality of hollow fibers.

6. The composite high and low temperature resistant cable according to claim 1, wherein: the copper conductor sequentially comprises a copper core, a polyethylene insulating layer, a second shielding layer and a protective layer from inside to outside.