CN211265067U

CN211265067U - Optical fiber composite fire-resistant low-voltage cable

Info

Publication number: CN211265067U
Application number: CN201922410905.7U
Authority: CN
Inventors: 张博; 叶汝夏; 赵军法; 张文波
Original assignee: Zhejiang Qichao Cable Co ltd
Current assignee: Zhejiang Qichao Cable Co ltd
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-08-14
Anticipated expiration: 2029-12-28

Abstract

The utility model relates to the field of cables, in particular to an optical fiber composite fire-resistant low-voltage cable, which comprises a plurality of lead bodies, optical fibers and a second fire-resistant layer, wherein the lead bodies comprise conductors, a first fire-resistant layer and an insulating layer, the conductors, the first fire-resistant layer and the insulating layer are sequentially wrapped from inside to outside, the lead bodies and the optical fibers are all wrapped inside the second fire-resistant layer, the inner side of the second fire-resistant layer is also filled with a filling layer, the filling layer is positioned between the lead bodies and the optical fibers, the outer end of the second fire-resistant layer is wrapped with a third fire-resistant layer, the outer end of the third fire-resistant layer is wrapped with an outer sheath, the lead bodies are distributed annularly, and the lead bodies are contacted with each other in pairs, thereby integrating the optical fibers and the cable into a whole, avoiding twice wiring, reducing the comprehensive cost and simultaneously improving the fire-resistant performance of the cable, effectively guarantee the stability of power transmission during the conflagration.

Description

Optical fiber composite fire-resistant low-voltage cable

Technical Field

The utility model relates to a cable field, more specifically say, relate to a compound fire-resistant low tension cable of optic fibre.

Background

The cable is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater, and is generally a cable similar to a rope formed by twisting several or several groups of leads (at least two leads in each group), wherein each group of leads are mutually insulated, a highly-insulated covering layer is wrapped outside the whole cable, and the cable has the characteristics of internal electrification and external insulation. The cable includes power cable, control cable, compensation cable, shielding cable, high temperature cable, computer cable, signal cable, coaxial cable, fire-resistant cable, marine cable, mining cable, aluminum alloy cable, etc. and is composed of single-strand or multi-strand conductor and insulating layer for connecting circuit electric appliance, etc.

The optical fiber is made of glass or plastic, can be used as a light conduction tool, in the existing life, a cable and light are usually independently used, however, in the using process, the optical fiber can be damaged by fire, once the fire resistance of the cable or the optical fiber is poor, the sheath is easily burnt, the electric leakage accident is easily caused, and great unsafe factors are brought.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a compound fire-resistant low tension cable of optic fibre, it can realize collecting optic fibre and cable in an organic whole, avoids twice wiring, reduces the comprehensive cost, has improved the fire resistance of this cable simultaneously, power transmission's stability when effectively guaranteeing the conflagration.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides an optic fibre compound fire-resistant low tension cable, includes a plurality of wire bodies, optic fibre and second flame retardant coating, the wire body includes conductor, first flame retardant coating and insulating layer, conductor, first flame retardant coating and insulating layer wrap up from interior to exterior in proper order, and a plurality of wire body and optic fibre all wrap up in the inside of second flame retardant coating, the inboard of second flame retardant coating still is filled there is the filling layer, and the filling layer is located between a plurality of wire bodies and optic fibre, the outer end parcel of second flame retardant coating has the third flame retardant coating, the outer end parcel of third flame retardant coating has the oversheath, can realize collecting optic fibre and cable in an organic whole, avoids twice wiring, reduces the combined cost, has improved the fire resistance of this cable simultaneously, the stability of power transmission when effectively guaranteeing the conflagration.

Furthermore, a plurality of the wire bodies are distributed in an annular shape, the wire bodies are mutually contacted, the optical fiber is positioned in a gap formed by the inner sides of the contacted wire bodies, and the optical fiber is protected by the wire bodies due to the fact that the fire-resistant layer is arranged in the wire bodies, so that the optical fiber is not easily damaged by fire.

Furthermore, a plurality of the contact surface of the wire body is set to be a plane, so that the contact area between two adjacent wire bodies is larger, and thus external fire or water vapor and the like are not easy to enter and damage the optical fiber.

Furthermore, the first fire-resistant layer is a fire-resistant mica layer, the second fire-resistant layer is a high-fire-resistant glass fiber tape, and the third fire-resistant layer is a magnesium oxide fire-resistant layer, so that multiple protection is realized, the fire resistance of the cable is enhanced, and the stability of power transmission in fire is effectively ensured.

Furthermore, the insulating layer is made of cross-linked polyethylene or polyvinyl chloride, so that the plurality of lead bodies are electrically isolated from each other, and electric energy transmission is effectively guaranteed.

Furthermore, the filling layer is formed by filling polypropylene ropes, so that the positioning among the plurality of lead bodies can be effectively realized, and the lead body has better tensile property, so that the lead body is not easy to break.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

one, this scheme can realize collecting optic fibre and cable in an organic whole, avoids twice wiring, reduces the combined cost, has improved the fire resistance of this cable simultaneously, power transmission's stability when effectively guaranteeing the conflagration.

The plurality of lead bodies are distributed in an annular shape, the lead bodies are mutually contacted, the optical fiber is positioned in a gap formed by the inner side of the contact back of the lead bodies, and the optical fiber is protected by the lead bodies due to the fire-resistant layer arranged in the lead bodies, so that the optical fiber is not easily damaged by fire.

Contact surfaces of the three or more lead bodies are arranged to be planes, so that the contact area between two adjacent lead bodies is larger, and external fire or water vapor and the like are not easy to enter and damage the optical fiber.

The first fire-resistant layer is a fire-resistant mica layer, the second fire-resistant layer is a high-fire-resistant glass fiber tape, the third fire-resistant layer is a magnesium oxide fire-resistant layer, multiple protection is achieved, the fire resistance of the cable is enhanced, and the stability of power transmission in fire is effectively guaranteed

And fifthly, the insulating layer is made of cross-linked polyethylene or polyvinyl chloride, so that the plurality of lead bodies are electrically isolated from one another, and electric energy transmission is effectively guaranteed.

Sixthly, the filling layer is formed by filling the polypropylene ropes, so that the positioning among the plurality of lead bodies can be effectively realized, and the lead body has better tensile property, so that the lead body is not easy to break.

Drawings

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

fig. 2 is a schematic structural view of the lead body of the present invention;

fig. 3 is a schematic structural view of the plurality of lead bodies after two-two contact.

The reference numbers in the figures illustrate:

1, a lead body, 11 conductors, 12 first flame retardant coatings, 13 insulating layers, 2 optical fibers, 3 filling layers, 4 second flame retardant coatings, 5 third flame retardant coatings and 6 outer sheaths.

Detailed Description

The technical scheme in the embodiment of the utility model is clearly and completely described; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships for convenience of description and simplicity of description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-3, an optical fiber composite fire-resistant low-voltage cable includes a plurality of conductor bodies 1, an optical fiber 2 and a second fire-resistant layer 4, wherein the conductor body 1 includes a conductor 11, a first fire-resistant layer 12 and an insulating layer 13, the conductor 11, the first fire-resistant layer 12 and the insulating layer 13 are sequentially wrapped from inside to outside, the conductor 11 is a conductive part of the cable and is a main part of the cable, the plurality of conductor bodies 1 and the optical fiber 2 are all wrapped inside the second fire-resistant layer 4, the inner side of the second fire-resistant layer 4 is further filled with a filling layer 3, and the filling layer 3 is positioned between the plurality of lead bodies 1 and the optical fiber 2, the outer end of the second flame retardant coating 4 is wrapped with a third flame retardant coating 5, the outer end of the third flame retardant coating 5 is wrapped with an outer sheath 6, the outer sheath 6 is used for protecting the cable so that the cable is not easy to be invaded by external impurities and moisture, and the cable is effectively prevented from being directly damaged by external force.

Referring to fig. 3, the plurality of lead bodies 1 are distributed annularly, and the plurality of lead bodies 1 are in contact with each other two by two, the optical fiber 2 is located in a gap formed by the inner side of the contacted plurality of lead bodies 1, because the fire-resistant layer is arranged in the lead bodies 1, the optical fiber 2 is protected by the plurality of lead bodies 1, so that the optical fiber 2 is not easily damaged by fire, the contact surfaces of the plurality of lead bodies 1 are arranged to be planes, the contact area between two adjacent lead bodies 1 is larger, and thus external fire or water vapor and the like are not easily caused to enter the damaged optical fiber 2.

First flame retardant coating 12 is fire-resistant mica layer, second flame retardant coating 4 is the high flame retardant glass fiber tape, third flame retardant coating 5 is the magnesium oxide flame retardant coating, multiple protection, strengthen the fire resistance of this cable, power transmission's stability when effectively guaranteeing the conflagration, the material of making of insulating layer 13 adopts crosslinked polyethylene or polyvinyl chloride, make between a plurality of wire bodies 1 keep apart each other electrically, effectively guarantee electric energy transport, filling layer 3 is formed by the packing of polypropylene rope, can effectively realize the location to between a plurality of wire bodies 1, still have better tensile strength, make wire body 1 be difficult for being broken by the stretch-break.

This scheme is through setting up multiple flame retardant coating for the cable is difficult for being burnt easily during the conflagration, and power transmission's stability when effectively guaranteeing the conflagration, and optical fiber and cable are in an organic whole, avoids twice wiring, reduces the combined cost, in addition, can set up optic fibre 2 in the space that two liang of contact back middle parts of a plurality of wire bodies 1 formed, utilizes the fire resistance of wire body 1 to strengthen the fire-resistant protection to optic fibre 2.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a fire-resistant low tension cable of compound optic fibre, includes a plurality of wire bodies (1), optic fibre (2) and second flame retardant coating (4), its characterized in that: the lead body (1) comprises a conductor (11), a first fire-resistant layer (12) and an insulating layer (13), the conductor (11), the first fire-resistant layer (12) and the insulating layer (13) are sequentially wrapped from inside to outside, the lead body (1) and the optical fiber (2) are all wrapped inside a second fire-resistant layer (4), a filling layer (3) is further filled on the inner side of the second fire-resistant layer (4), the filling layer (3) is located between the lead bodies (1) and the optical fiber (2), a third fire-resistant layer (5) is wrapped on the outer end of the second fire-resistant layer (4), and an outer sheath (6) is wrapped on the outer end of the third fire-resistant layer (5).

2. The optical fiber composite fire-resistant low-voltage cable according to claim 1, wherein: the plurality of lead bodies (1) are distributed in an annular shape, the lead bodies (1) are mutually contacted with each other, and the optical fibers (2) are positioned in gaps formed in the inner side of the contacted lead bodies (1).

3. The optical fiber composite fire-resistant low-voltage cable according to claim 2, wherein: the contact surfaces of the lead bodies (1) are arranged to be flat.

4. The optical fiber composite fire-resistant low-voltage cable according to claim 1, wherein: the first fire-resistant layer (12) is a fire-resistant mica layer, the second fire-resistant layer (4) is a high-fire-resistant glass fiber tape, and the third fire-resistant layer (5) is a magnesium oxide fire-resistant layer.

5. The optical fiber composite fire-resistant low-voltage cable according to claim 1, wherein: the insulating layer (13) is made of cross-linked polyethylene or polyvinyl chloride.

6. The optical fiber composite fire-resistant low-voltage cable according to claim 1, wherein: the filling layer (3) is formed by filling polypropylene ropes.