CN212322690U

CN212322690U - Pressure-resistant crosslinked polyethylene insulated cable

Info

Publication number: CN212322690U
Application number: CN202020996527.5U
Authority: CN
Inventors: 何玉华; 解海萍
Original assignee: Tianjin Zhengbiao Jinda Cable Group Co ltd
Current assignee: Tianjin Zhengbiao Jinda Cable Group Co ltd
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-01-08
Anticipated expiration: 2030-06-04

Abstract

The utility model provides a withstand voltage crosslinked polyethylene insulated cable, which comprises a cable core, wherein the cable core comprises a first conductor arranged at the center and a plurality of second conductors evenly distributed around the first conductor, the outsides of the first conductor and the second conductors are wrapped with crosslinked polyethylene insulating layers, the outside of the crosslinked polyethylene insulating layer on the first conductor is wrapped with an elastic rubber buffer layer, the outside of the crosslinked polyethylene insulating layer on the second conductor is provided with a rubber elastic buffer block, the outside of the cable core is wrapped with a silica gel torsion-resistant layer, the outside of the silica gel torsion-resistant layer is wrapped with a steel wire armor layer, the outside of the steel wire armor layer is wrapped with a crosslinked polyethylene inner sheath layer, the outside of the crosslinked polyethylene inner sheath layer is provided with a flame-retardant thermal-insulating layer, the outside of the flame-retardant thermal-insulating layer is provided with a crosslinked polyethylene outer sheath layer, a plurality of first pressure-resistant devices are arranged between the flame-retardant thermal-insulating layer and, a plurality of second pressure resistant devices are arranged between the flame-retardant heat-insulating layer and the cross-linked polyethylene inner sheath layer.

Description

Pressure-resistant crosslinked polyethylene insulated cable

Technical Field

The utility model relates to a cable manufacture technical field especially relates to a withstand voltage crosslinked polyethylene insulated cable.

Background

At present, the cable is used as a signal connecting line among various electrical appliances, instruments and automatic devices, is mainly used for controlling and monitoring various functions such as signal transmission and control signal transmission in occasions such as a chain circuit, a protection circuit and the like, and is widely applied to important economic fields such as various industrial and mining enterprises, traffic transportation and the like; the existing crosslinked polyethylene insulated cable is mostly transported by a container vehicle, the cables can be extruded mutually in the transporting process, and particularly, the collision between the cables can be aggravated when the container vehicle jolts, so that the cables are easily broken, and the normal use of the cables is further influenced.

Disclosure of Invention

The utility model discloses just to above technical problem, provide a withstand voltage crosslinked polyethylene insulated cable.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: a pressure-resistant cross-linked polyethylene insulated cable comprises a cable core and is characterized in that the cable core comprises a first conductor arranged in the center and a plurality of second conductors uniformly distributed around the first conductor, cross-linked polyethylene insulating layers wrap the outside of the first conductor and the outside of the second conductors, an elastic rubber buffer layer abutting against the second conductors wraps the outside of the cross-linked polyethylene insulating layer on the first conductor, a rubber elastic buffer block is arranged on the outside of the cross-linked polyethylene insulating layer on the second conductor and abuts against the next adjacent second conductor, a silica gel torsion-resistant layer wraps the outside of the cable core, a steel wire armor layer wraps the outside of the silica gel torsion-resistant layer, a cross-linked polyethylene inner sheath layer wraps the outside of the steel wire armor layer, a support sleeve group is arranged between the steel wire armor layer and the cross-linked polyethylene inner sheath layer, and a flame-retardant thermal insulation layer is arranged on the outside of the cross-linked polyethylene inner sheath layer, the outside of fire-retardant insulating layer is equipped with crosslinked polyethylene oversheath layer, is equipped with a plurality of first compressive devices between fire-retardant insulating layer and the crosslinked polyethylene oversheath layer, is equipped with a plurality of second compressive devices between fire-retardant insulating layer and the crosslinked polyethylene inner sheath layer.

The support sleeve group is a plurality of high-density polyethylene resin support bars which are rotationally distributed by taking the central axis of the cable as the center, and the cross section of each high-density polyethylene resin support bar is of an oval structure.

The first pressure-resistant device comprises a rubber elastic sleeve with an oval cross section, polymer foaming materials are filled in the rubber elastic sleeve, and the second pressure-resistant device is an elastic rubber strip with a round cross section.

The thickness of the crosslinked polyethylene inner sheath layer is 1-4mm, and the thickness of the crosslinked polyethylene outer sheath layer is 2-5 mm.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model is provided with the outer sheath layer of the crosslinked polyethylene and the inner sheath layer of the crosslinked polyethylene to protect the cable at the same time, which can effectively increase the strength of the cable; the first pressure resisting devices and the second pressure resisting devices can effectively disperse the pressure of mutual collision of the cables in the transportation process, and the pressure resisting performance of the cables is improved; the anti-twisting performance of the cable can be effectively improved by the arranged silica gel anti-twisting layer, so that the application range of the cable is widened.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure: 1. a first conductor; 2. a second conductor; 3. a crosslinked polyethylene insulating layer; 4. an elastic rubber buffer layer; 5. a rubber elastic buffer block; 6. a silicone torsion-resistant layer; 7. a steel wire armor layer; 8. a crosslinked polyethylene inner jacket layer; 9. a flame-retardant heat-insulating layer; 10. a crosslinked polyethylene outer jacket layer; 11. a first compression resistant device; 12. a second compressive resistance device; 13. high density polyethylene resin support bars.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

as shown in figure 1, a pressure-resistant cross-linked polyethylene insulated cable comprises a cable core, the cable core comprises a first conductor 1 arranged in the center and a plurality of second conductors 2 uniformly distributed around the first conductor 1, cross-linked polyethylene insulating layers 3 are respectively wrapped outside the first conductor 1 and the second conductors 2, an elastic rubber buffer layer 4 abutting against the second conductor 2 is wrapped outside the cross-linked polyethylene insulating layer 3 on the first conductor 1, a rubber elastic buffer block 5 is arranged outside the cross-linked polyethylene insulating layer 3 on the second conductor 2, the rubber elastic buffer block 5 abuts against the next adjacent second conductor 2, a silica gel torsion-resistant layer 6 is wrapped outside the cable core, a steel wire armor layer 7 is wrapped outside the silica gel torsion-resistant layer 6, a cross-linked polyethylene inner sheath layer 8 is wrapped outside the steel wire armor layer 7, a support is arranged between the steel wire armor layer 7 and the cross-linked polyethylene inner sheath layer 8, the outside of crosslinked polyethylene inner sheath layer 8 is equipped with fire-retardant insulating layer 9, and the outside of fire-retardant insulating layer 9 is equipped with crosslinked polyethylene outer sheath layer 10, is equipped with a plurality of first pressure resistance device 11 between fire-retardant insulating layer 9 and crosslinked polyethylene outer sheath layer 10, is equipped with a plurality of second pressure resistance device 12 between fire-retardant insulating layer 9 and the crosslinked polyethylene inner sheath layer 8.

The support sleeve group is a plurality of high-density polyethylene resin support bars 13 which are rotationally distributed by taking the central axis of the cable as the center, and the cross section of each high-density polyethylene resin support bar 13 is of an oval structure.

The first pressure resisting device 11 comprises a rubber elastic sleeve with an oval cross section, polymer foaming materials are filled in the rubber elastic sleeve, and the second pressure resisting device 12 is an elastic rubber strip with a round cross section.

The thickness of the crosslinked polyethylene inner sheath layer 8 is 1-4mm, and the thickness of the crosslinked polyethylene outer sheath layer 10 is 2-5 mm.

The utility model is provided with the crosslinked polyethylene outer sheath layer 10 and the crosslinked polyethylene inner sheath layer 8 to protect the cable at the same time, which can effectively increase the strength of the cable; the arranged first pressure resisting devices 11 and the second pressure resisting devices 12 can effectively disperse the pressure of mutual collision of the cables in the transportation process, and improve the pressure resisting performance of the cables; the plurality of high-density polyethylene resin support bars 13 can effectively improve the toughness of the cable; the silicone rubber torsion-resistant layer 6 can effectively improve the torsion resistance of the cable, so that the application range of the cable is improved.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.

Claims

1. A pressure-resistant cross-linked polyethylene insulated cable comprises a cable core and is characterized in that the cable core comprises a first conductor (1) arranged at the center and a plurality of second conductors (2) uniformly distributed around the first conductor (1), cross-linked polyethylene insulating layers (3) are wrapped outside the first conductor (1) and the second conductors (2), an elastic rubber buffer layer (4) abutted against the second conductors (2) is wrapped outside the cross-linked polyethylene insulating layers (3) on the first conductor (1), a rubber elastic buffer block (5) is arranged outside the cross-linked polyethylene insulating layers (3) on the second conductors (2), the rubber elastic buffer block (5) abuts against the next adjacent second conductor (2), a silica gel torsion-resistant layer (6) is wrapped outside the cable core, a steel wire armor layer (7) is wrapped outside the silica gel torsion-resistant layer (6), a cross-linked polyethylene inner sheath layer (8) is wrapped outside the steel wire armor layer (7), be equipped with the supporting sheath between steel wire armor (7) and crosslinked polyethylene inner sheath layer (8), the outside of crosslinked polyethylene inner sheath layer (8) is equipped with fire-retardant insulating layer (9), the outside of fire-retardant insulating layer (9) is equipped with crosslinked polyethylene outer sheath layer (10), be equipped with a plurality of first pressure resistant device (11) between fire-retardant insulating layer (9) and crosslinked polyethylene outer sheath layer (10), be equipped with a plurality of second pressure resistant device (12) between fire-retardant insulating layer (9) and crosslinked polyethylene inner sheath layer (8).

2. The voltage-resistant cross-linked polyethylene insulated cable according to claim 1, wherein the support sets are a plurality of support bars (13) made of high-density polyethylene resin and rotatably distributed around the central axis of the cable, and the cross section of each support bar (13) made of high-density polyethylene resin is of an oval structure.

3. A voltage-resistant cross-linked polyethylene insulated cable as claimed in claim 1, characterized in that said first pressure-resistant means (11) comprises a rubber elastic sheath with an oval cross-section, the inside of which is filled with a polymer foam material, and the second pressure-resistant means (12) is an elastic rubber strip with a circular cross-section.

4. A voltage-resistant cross-linked polyethylene insulated cable as claimed in claim 1, characterized in that the thickness of the inner cross-linked polyethylene sheath layer (8) is 1-4mm and the thickness of the outer cross-linked polyethylene sheath layer (10) is 2-5 mm.