CN219246407U

CN219246407U - Thin-wall insulation small-section cable

Info

Publication number: CN219246407U
Application number: CN202223130465.8U
Authority: CN
Inventors: 董春; 王思聪; 陈超; 卢燕芸; 房权生; 顾申杰; 李昆鹏; 魏钰柠; 潘爱梅; 陈捷吉; 马彦辉; 杨昭云; 夏志明; 郭文涛; 乐伟巍; 黄冬艳; 赵禹尘; 马涛; 卢青
Original assignee: Baosheng Science and Technology Innovation Co Ltd; Shanghai Nuclear Engineering Research and Design Institute Co Ltd
Current assignee: Baosheng Science and Technology Innovation Co Ltd; Shanghai Nuclear Engineering Research and Design Institute Co Ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-06-23
Anticipated expiration: 2032-11-24

Abstract

The utility model discloses a thin-wall insulation small-section cable, which comprises at least one cable core; the cable core comprises a cable core layer, an inner insulating layer and an outer insulating layer which are sequentially arranged from inside to outside; the thickness ratio of the inner edge insulation layer to the outer insulation layer is 0.2-0.25. The utility model is provided with the inner insulating layer and the outer insulating layer, and the thickness ratio of the inner edge insulating layer to the outer insulating layer is 0.2-0.25, so that the thickness of the manufactured cable can be half of that of a conventional cable, thereby not only meeting the voltage-resistant requirement of the cable in the use environment, but also meeting the flame-retardant requirement of complex dense wiring in an electrical cabinet.

Description

Thin-wall insulation small-section cable

Technical Field

The utility model relates to the technical field of cables, in particular to a thin-wall insulation small-section cable.

Background

With the development of the domestic process of nuclear power projects, the domestic nuclear power technology is continuously introduced, digested and absorbed, and an autonomous innovative nuclear power station technology is formed, particularly, the national and first-grade, hualong first-grade and other Chinese third-grade nuclear power units are continuously put into operation, the space laying requirements on the 1E-grade electric disk table cabinet, instrument cabinet and other cabinets of the nuclear power station are higher, and the use environment with small bending radius exists, so that the use selection requirement on cables is higher, and the service life and the flame retardance of general cables cannot meet the requirement at present.

Therefore, there is a need to design a thin-walled insulated small-section cable to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a thin-wall insulation small-section cable aiming at the problem that the service life and the flame retardance of a common cable in the prior art cannot meet the use requirements.

The technical scheme for realizing the aim of the utility model is as follows: a thin-wall insulated small-section cable comprises at least one wire core; the cable core comprises a cable core layer, an inner insulating layer and an outer insulating layer which are sequentially arranged from inside to outside; the thickness ratio of the inner insulating layer to the outer insulating layer is 0.2-0.25.

The cable core layer is formed by twisting 7 copper conductors according to 1+6, and anti-wiredrawing is arranged at gaps between any two adjacent copper conductors outside and the copper conductor inside.

The material of the inner insulating layer and the material of the outer insulating layer are both radiation crosslinked insulating polyolefin.

The total thickness of the inner insulating layer and the outer insulating layer is 0.3 mm-0.4 mm.

The wire core and the filler form an intermediate layer; and a woven shielding layer is arranged on the outer side of the middle layer.

And a sheath layer is arranged outside the braided shielding layer.

The braided shielding layer is formed by braiding a plurality of stranded insulating wire core strips with tinned copper wires.

The wire cores are distributed in a 1+6 mode.

The cross-sectional area of the copper conductor is 0.2mm ² ～0.75mm ² 。

An isolation layer is arranged between the woven shielding layer and the outer middle layer.

By adopting the technical scheme, the utility model has the following beneficial effects: (1) The utility model is provided with the inner insulating layer and the outer insulating layer, and the thickness ratio of the inner insulating layer to the outer insulating layer is 0.2-0.25, so that the thickness of the manufactured cable can be half of that of a conventional cable, thereby not only meeting the voltage-resistant requirement of the cable in the use environment, but also meeting the flame-retardant requirement of complex dense wiring in an electrical cabinet.

(2) According to the utility model, the tensile wire is arranged in the gap between the inner copper conductor and the outer adjacent two copper conductors, so that the tensile strength of the conductors can be improved by more than two times, the problem of wire breakage in the process of processing and manufacturing the conductors is solved, and the hidden danger of wire breakage caused by pulling in the process of actually installing and penetrating is eliminated with high probability.

(3) The material of the inner insulating layer and the outer insulating layer is irradiation crosslinking insulating polyolefin, so that the insulating effect is better.

(4) The total thickness of the inner insulating layer and the outer insulating layer is 0.3-0.4 mm, so that the section of the manufactured cable is smaller.

(5) The cable core and the filler form the intermediate layer, and the outer side of the intermediate layer is provided with the braided shielding layer, so that the strength of the cable is improved, and meanwhile, the bending performance of the cable is ensured.

(6) The sheath layer is arranged on the outer side of the braided shielding layer, so that a good protection effect can be achieved on the cable.

(7) The braided shielding layer is formed by braiding a plurality of stranded insulating wire core strips with tinned copper wires, and has a better shielding effect.

(8) An isolation layer is arranged between the woven shielding layer and the outer middle layer so as to avoid damaging the outer insulating layer.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present utility model.

Fig. 3 is a schematic structural diagram of embodiment 3 of the present utility model.

The reference numerals in the drawings are:

the cable comprises a cable core layer 1, a copper conductor 1-1, a tensile wire 1-2, an inner insulating layer 2, an outer insulating layer 3, a woven shielding layer 4 and a sheath layer 5.

Detailed Description

Example 1

Referring to fig. 1 to 3, a thin-wall insulated small-section cable of the present embodiment includes at least one core; the cable core comprises a cable core layer 1, an inner insulating layer 2 and an outer insulating layer 3 which are sequentially arranged from inside to outside; the thickness ratio of the inner insulating layer 2 to the outer insulating layer 3 is 0.2 to 0.25.

Furthermore, the cable core layer 1 is formed by twisting 7 copper conductors 1-1 according to 1+6, and the anti-wiredrawing 1-2 is arranged in the gap between any two copper conductors 1-1 adjacent to the outside and the inner copper conductor 1-1, so that the tensile strength of the conductor can be improved by more than two times, the problem of wire breakage caused by processing and manufacturing of the conductor is solved, and the hidden danger of wire breakage caused by pulling in the actual installation penetrating process is eliminated with high probability.

Furthermore, the materials of the inner insulating layer 2 and the outer insulating layer 3 are all radiation crosslinked insulating polyolefin, so that the insulating effect is better.

Further, the total thickness of the inner insulating layer 2 and the outer insulating layer 3 is 0.3 mm-0.4 mm, so that the section of the manufactured cable is smaller.

Further, the wire core and the filler form an intermediate layer; the outer side of the middle layer is provided with the woven shielding layer 4, so that the overall strength of the cable is improved, and the bending performance of the cable is improved.

Furthermore, the outer side of the braided shielding layer 4 is provided with a sheath layer 5, and preferably, the sheath layer 5 is preferably made of irradiation crosslinking low-smoke halogen-free flame retardant polyolefin, so that a good protection effect can be achieved on the inside.

Further, the braided shielding layer 4 is formed by braiding a plurality of stranded insulating wire core strips with tinned copper wires, so that damage to the outer insulating layer 3 can be avoided.

Preferably, the cores are distributed in a 1+6 manner.

Preferably, the copper conductor 1-1 has a cross-sectional area of 0.2mm ² ～0.75mm ² 。

Further, an isolation layer 6 is arranged between the braided shielding layer 4 and the outer middle layer, so that the protection effect of the outer insulating layer 3 is achieved, and the damage of the outer insulating layer 3 is avoided.

Example 2

This embodiment is substantially the same as embodiment 1 except that: the number of the wire cores of the embodiment is 2, and the sheath layer 5 is not provided.

Example 3

The core of the present embodiment is used alone as a cable.

The utility model is provided with the inner insulating layer 2 and the outer insulating layer 3, and the thickness ratio of the inner insulating layer 2 to the outer insulating layer 3 is 0.2-0.25, so that the thickness of the manufactured cable can be half of that of a conventional cable, the voltage-resistant requirement of the cable in the use environment is met, and the flame-retardant requirement of complex dense wiring in an electric cabinet is also met.

While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.

Claims

1. The utility model provides a thin wall insulation small-section cable which characterized in that: comprises at least one wire core; the cable core comprises a cable core layer (1), an inner insulating layer (2) and an outer insulating layer (3) which are sequentially arranged from inside to outside; the thickness ratio of the inner insulating layer (2) to the outer insulating layer (3) is 0.2-0.25.

2. A thin-walled insulated small-section cable according to claim 1, wherein: the cable core layer (1) is formed by twisting 7 copper conductors (1-1) according to 1+6, and anti-wiredrawing (1-2) is arranged at gaps between any two adjacent copper conductors (1-1) outside and the copper conductor (1-1) inside.

3. A thin-walled insulated small-section cable according to claim 1, wherein: the material of the inner insulating layer (2) and the material of the outer insulating layer (3) are irradiation crosslinking insulating polyolefin.

4. A thin-walled insulated small-section cable according to claim 1, wherein: the total thickness of the inner insulating layer (2) and the outer insulating layer (3) is 0.3 mm-0.4 mm.

5. A thin-walled insulated small-section cable according to claim 1, wherein: the wire core and the filler form an intermediate layer; and a woven shielding layer (4) is arranged on the outer side of the middle layer.

6. A thin-walled insulated small-section cable according to claim 5, wherein: the outer side of the braided shielding layer (4) is provided with a sheath layer (5).

7. A thin-walled insulated small-section cable according to claim 5, wherein: the braided shielding layer (4) is formed by braiding a plurality of stranded insulating wire cores with tinned copper wires.

8. A thin-walled insulated small-section cable according to claim 5, wherein: the wire cores are distributed in a 1+6 mode.

9. A thin-walled insulated small-section cable according to claim 2, wherein: the cross-sectional area of the copper conductor (1-1) is 0.2mm ² ～0.75mm ² 。

10. A thin-walled insulated small-section cable according to claim 5, wherein: an isolation layer (6) is arranged between the woven shielding layer (4) and the outer middle layer.