CN219163034U

CN219163034U - Small-section multi-core fireproof cable

Info

Publication number: CN219163034U
Application number: CN202222938454.6U
Authority: CN
Inventors: 张喜亮; 刘永红; 许雁飞; 代文鑫
Original assignee: Shandong Electrical Engineering and Equipment Group Co Ltd; Chongqing Taishan Cable Co Ltd
Current assignee: Shandong Electrical Engineering and Equipment Group Co Ltd; Chongqing Taishan Cable Co Ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-06-09
Anticipated expiration: 2032-11-04

Abstract

The utility model discloses a small-section multi-core fireproof cable which comprises conductors with three-core structures and cross sections in a 'delta' shape, wherein each conductor is wrapped with a mica tape insulating layer, the mica tape insulating layers of adjacent conductors are tightly abutted, the thickness of each mica tape insulating layer is 0.11-0.17 mm, and a sheath layer is arranged outside each mica tape insulating layer. The technical problem solved by the utility model is to develop a small-section multi-core fireproof cable with a simple and stable structure.

Description

Small-section multi-core fireproof cable

Technical Field

The utility model relates to the technical field of wires and cables, in particular to a small-section multi-core fireproof cable.

Background

To ensure data security, it is desirable to have enough time to recycle all data back to the home after a fire before the entire network is paralyzed and to transfer them to a safe place to minimize the possibility of data loss. Thus, among the standards for cables, there is a type of fire protection standard, known as the "line integrity" standard, whose objective is that the cable still remain clear of the line in the fire, allowing the normal transmission of power and information, and thus cables meeting the series of integrity requirements are also known as fire protection wires. With the increase of safety awareness, fireproof cables have been widely used in various fields. The production technology of the existing fireproof cable is mature, industrial production is realized, and the small-section multi-core fireproof cable is not provided with production capacity for the reasons of small conductor section, multiple wire cores, small outer diameter, large production difficulty and the like, and only stays in the research and development trial production stage, so that industrial mass continuous production is not formed. Meanwhile, the prior art is complex in structural design about the small-section multi-core fireproof cable, the wire core is unstable, the used materials are more in variety, and in the production of the small-section multi-core cable, the production difficulty is undoubtedly increased, and the cost is increased.

Accordingly, those skilled in the art have been working to develop a small-section multi-core fireproof cable that is simple and stable in structure.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model discloses a small-section multi-core fireproof cable, and aims to provide a small-section multi-core fireproof cable with simple and stable structure.

In order to achieve the purpose, the utility model provides a small-section multi-core fireproof cable which comprises a conductor with a three-core structure and a cross section in a shape of a Chinese character 'pin', wherein the conductor of the cable can adopt electrical copper with purity of not less than 99.95 percent and mainly transmits electric energy to conduct current. And each conductor is externally wrapped with a mica tape insulating layer, the mica tape insulating layers of adjacent conductors are tightly abutted, the thickness of each mica tape insulating layer is 0.11-0.17 mm, and a sheath layer is arranged outside each mica tape insulating layer.

Preferably, the mica tape insulating layer is a glass fiber polyester double-sided reinforced gold mica tape wrapped on the conductor, the wrapping layer number of the mica tape insulating layer is two, the overlapping wrapping rate is 15% -25%, and the surface after wrapping is continuously smooth without defects such as scratches, bulges and the like.

Preferably, the cross-sectional area of the conductor has a size of 1.5, 2.5, 4.0, 6.0, 10.0, 16.0mm ² ，

Preferably, the cross-sectional area of the conductor is 1.5, 2.5, 4.0, 6.0mm ² Is a solid conductor, and the cross section is 10.0 mm and 16.0mm ² Is a circular non-compacted conductor. The production cost is reduced by controlling the process with different cross sections on the premise of meeting the use requirement.

Preferably, the sheath layer is an extrusion embedded type, and the material of the sheath layer is ceramic low-smoke halogen-free polyolefin. The main advantages are that hard ceramic hard shell can be produced under the condition of flame burning or high temperature, the hard shell is not melted or dropped, water spraying and mechanical vibration can be prevented, and the fire-proof ceramic hard shell has very good heat insulation and fire-isolation effects, so that the smoothness of power transmission under fire is better ensured. The thickness of the sheath layer can be designed according to the requirement, and the fixing requirement is not required. The outer sheath is continuously and tightly coated outside the cable cores and is filled between the cable cores, and the outer surface is smooth and flat without defects such as holes, cracks, bubbles and the like.

The beneficial effects of the utility model are as follows:

through the conductor of design three-core structure, and the conductor is closely offseted after wrapping insulation, forms firm triangle-shaped to guarantee the stability of sinle silk. And when the number of cores is large, the out-of-roundness of the finished cable is difficult to control, and the three-core design of the utility model can better control the out-of-roundness of the cable and is convenient for production. Meanwhile, the thickness of the mica tape insulating layer is controlled, so that a good insulating effect can be achieved, and the diameter of the whole cable can be controlled. And the mica tape is adopted as the material of the insulating layer, the mica tape is wrapped on the conductor, the process is simple, and the ceramic low-smoke halogen-free polyolefin material is adopted as the sheath material and is directly extruded outside the cable core. The novel cable-forming packing material and the cable-forming packing belt are not used, the structure is simple, the number of raw materials and the number of manufacturing procedures are greatly reduced, the production difficulty is reduced, and the production cost and the material cost are reduced.

Drawings

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

In the above figures: 1. a conductor; 2. a mica tape insulating layer; 3. and a sheath layer.

Detailed Description

The present utility model will be further described with reference to the drawings and examples, and it should be noted that in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific manner, and thus should not be construed as limiting the present utility model. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, the utility model provides a small-section multi-core fireproof cable, which comprises a conductor 1 with a three-core structure and a cross section in a shape of a Chinese character 'pin', wherein the conductor 1 of the cable can adopt electrical copper with purity of not less than 99.95 percent and mainly transmits electric energy to conduct current. The cross-sectional area of the conductor 1 has the sizes of 1.5, 2.5, 4.0, 6.0, 10.0 and 16.0mm ² Wherein the cross-sectional area is 1.5, 2.5, 4.0, 6.0mm ² Is a solid conductor, and the cross section is 10.0 mm and 16.0mm ² Is a circular non-compacted conductor. The use requirements are met by controlling the process with different cross sectionsOn the premise of reducing the production cost. Each conductor 1 is wrapped with a mica tape insulating layer 2, the mica tape insulating layers 2 of adjacent conductors 1 are closely abutted, the thickness of the mica tape insulating layer 2 is 0.11-0.17 mm, in the embodiment, the thickness of the mica tape insulating layer 2 is 0.14mm, and the outer part of the mica tape insulating layer 2 is a sheath layer 3.

Further, the mica tape insulating layer 2 is a glass fiber polyester double-sided reinforced gold mica tape wrapped on the conductor 1, and the number of wrapping layers of the mica tape insulating layer 2 is two, the overlapping wrapping rate is 15% -25%, in this embodiment, the overlapping wrapping rate is 20%, and the surface after wrapping should be continuous and smooth, and the defects of scratches, bulges and the like cannot be caused.

Finally, the sheath layer 3 is embedded by extrusion, and the material is ceramic low-smoke halogen-free polyolefin. The main advantages are that hard ceramic hard shell can be produced under the condition of flame burning or high temperature, the hard shell is not melted or dropped, water spraying and mechanical vibration can be prevented, and the fire-proof ceramic hard shell has very good heat insulation and fire-isolation effects, so that the smoothness of power transmission under fire is better ensured. The thickness of the sheath layer 3 can be designed according to the requirement, and the fixing requirement is not required. The outer sheath is continuously and tightly coated outside the cabling cores of the conductor 1, is filled between the cabling cores, and has smooth and flat outer surface without defects such as holes, cracks, bubbles and the like.

In the above embodiment, by designing the conductor 1 with a three-core structure, and tightly propping the conductor 1 after wrapping insulation, a stable triangle is formed, so that the stability of the wire core is ensured. Because the out-of-roundness of the finished cable is difficult to control when the number of cores is large, the three-core design of the utility model can also better control the out-of-roundness of the cable and is convenient for production. Meanwhile, the thickness of the mica tape insulating layer 2 is controlled, so that a good insulating effect can be achieved, and the diameter of the whole cable can be controlled. And the mica tape is adopted as the material of the insulating layer, the mica tape is wrapped on the conductor 1, the process is simple, and the ceramic low-smoke halogen-free polyolefin material is adopted as the sheath material and is directly extruded outside the cable core. The novel cable-forming packing material and the cable-forming packing belt are not used, the structure is simple, the number of raw materials and the number of manufacturing procedures are greatly reduced, the production difficulty is reduced, and the production cost and the material cost are reduced.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. The utility model provides a little cross-section multicore fireproof cable which characterized in that: the three-core type solar cell comprises conductors (1) with cross sections of three-core structures in a 'article' shape, wherein each conductor (1) is externally wrapped with a mica tape insulating layer (2), the mica tape insulating layers (2) of adjacent conductors (1) are tightly abutted against each other, the thickness of each mica tape insulating layer (2) is 0.11-0.17 mm, and a sheath layer (3) is arranged outside each mica tape insulating layer (2).

2. The small-section multi-core fireproof cable according to claim 1, wherein: the mica tape insulating layer (2) is a glass fiber polyester double-sided reinforced gold mica tape wrapped on the conductor (1), the wrapping layer number of the mica tape insulating layer (2) is two, and the overlapping wrapping rate is 15% -25%.

3. The small-section multi-core fireproof cable according to claim 2, wherein: the cross-sectional area of the conductor (1) has a size of 1.5, 2.5, 4.0, 6.0, 10.0, 16.0mm ² 。

4. A small-section multi-core fireproof cable according to claim 3, wherein: the cross-sectional area of the conductor (1) is 1.5, 2.5, 4.0 and 6.0mm ² Is a solid conductor, and the cross section is 10.0 mm and 16.0mm ² Is a circular non-compacted conductor.

5. The small-section multi-core fireproof cable according to claim 1, wherein: the sheath layer (3) is an extrusion embedded type, and the material of the sheath layer is ceramic low-smoke halogen-free polyolefin.