CN210091774U

CN210091774U - Fire-resistant control cable

Info

Publication number: CN210091774U
Application number: CN201921455713.1U
Authority: CN
Inventors: 韩祥祥; 傅小林
Original assignee: Chongqing Ke Fei Wire Cable Co Ltd
Current assignee: Chongqing Ke Fei Wire Cable Co Ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-02-18
Anticipated expiration: 2029-09-03

Abstract

The utility model relates to a fire resisting cable technical field discloses a fire resisting control cable, by outer oversheath layer, shielding layer, double steel band armor, around covering, inner sheath layer, filling layer and conductor in proper order to interior, the conductor outside wraps up insulating layer, glass fiber braid over braid in proper order from inside to outside, the filling layer wrap up in the glass fiber braid over braid is outside, the inner layer structure of cable is by the whole cladding of outer layer structure in proper order. The fire-resistant control cable is not easy to burn in case of fire, and can prevent flame from spreading and disaster from expanding; the cable adopts double-deck steel band armor, prevents armor corrosion, intaking, moisture permeability, and when meeting fire burning, fire behaviour is good, and low smoke is nontoxic, does not have the injury to the human body, is favorable to people to flee for one's life.

Description

Fire-resistant control cable

Technical Field

The utility model relates to a fire resisting cable technical field especially relates to a fire resisting control cable.

Background

With the development of the power industry, control cables are widely applied to the fields of large buildings, chemical engineering, petroleum, power plants and the like, and the fields have high requirements on safety performance such as fire prevention and the like. The defects in the prior art are that the fire resistance of the existing control cable is not high, and potential safety hazards such as short circuit, open circuit and the like are easy to occur under the conditions of high temperature, fire and the like.

Disclosure of Invention

To the not enough of above-mentioned prior art, the utility model provides a fire-resistant control cable solves above-mentioned problem.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a fire-resistant control cable, includes oversheath layer, shielding layer, double steel tape armor in proper order, winds covering, inner sheath layer, filling layer and conductor from outside to inside, the conductor outside is from inside to outside in proper order cladding insulating layer, glass fiber braid over braid, the filling layer wrap up in the glass fiber braid over braid is outside, the inner layer structure of cable is by the whole cladding of outer layer structure in proper order.

In the technical scheme, the shielding layer is arranged on the outer layer of the outer sheath layer, so that the electric field structure can be improved, the electric field is uniform, the insulation pollution is reduced, the double-layer armor layer can provide enough hardness and rigidity for the cable, and the glass fiber braided belt effectively improves the high-temperature resistance of the cable.

Preferably, the filling layer is an asbestos flame-retardant filling layer.

Thus, the asbestos flame-retardant filling layer is applied to filling of the multi-core cable so as to enable the cable to be fire-resistant and round.

Preferably, the insulating layer, the inner sheath layer and the outer sheath layer are made of special ceramic silicon rubber for fireproof wires and cables.

Therefore, the cable can be rapidly sintered into ceramic at high temperature, and the cable is not melted and dropped under the high-temperature environment below 1300 ℃, so that the cable has a firm protection effect and the normal operation of the cable is ensured; can be used in fire and keep undeformed, and the smooth circuit of guarantee fire condition.

Preferably, the shielding layer is made of tinned copper wires.

Thus, after the copper wire is tinned, the rubber is prevented from being sticky due to chemical reaction between free sulfur precipitated from the rubber and copper, and is prevented from becoming brittle due to gradual hardening, and dark black copper sulfide is generated on the surface of copper, which increases the resistance and makes the copper wire brittle.

Preferably, the wrapping layer is made of flame-retardant glass ribbon.

Therefore, the flame-retardant glass ribbon has excellent fire resistance, can block most of flame, and improves the flame retardance and the light transmittance of the cable.

Preferably, the double-layer steel strip armor layer is a galvanized steel strip.

Thus, the galvanized steel strip is processed by the procedures of pickling, galvanizing, packaging and the like of common steel strips, and has good corrosion resistance.

Preferably, the number of the conductors is 3.

In this way, the electrical conductivity of the cable can be increased.

The utility model has the advantages that:

the fire-resistant control cable is not easy to burn in case of fire, and can prevent flame from spreading and disaster from expanding; the cable adopts double-deck steel band armor, prevents armor corrosion, intaking, moisture permeability, and when meeting fire burning, fire behaviour is good, and low smoke is nontoxic, does not have the injury to the human body, is favorable to people to flee for one's life.

Drawings

Fig. 1 is a schematic structural view of a fire-resistant control cable according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "upper, lower" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

As shown in figure 1, the fire-resistant control cable sequentially comprises an outer sheath layer 1, a shielding layer 2, a double-layer steel-tape armor layer 3, a wrapping layer 4, an inner sheath layer 5, a filling layer 6 and a conductor 9 from outside to inside, wherein the conductor 9 is externally coated with an insulating layer 8 and a glass fiber braided belt 7 from inside to outside, the filling layer 6 is coated outside the glass fiber braided belt 7, and the inner layer structure of the cable is sequentially coated by the outer layer structure.

Like this, set up the shielding layer at outer sheath layer, can improve the electric field structure, make the electric field even, reduce insulating pollution, double-deck armor can provide sufficient hardness and rigidity for the cable, and the glass fiber braid over braid has promoted the high temperature resistance of cable effectively.

In this embodiment, the filling layer 6 is an asbestos flame-retardant filling layer.

In this embodiment, the insulating layer 8, the inner sheath layer 5, and the outer sheath layer 1 are made of special ceramic silicone rubber for fireproof and fire-resistant wires and cables.

In this embodiment, the shielding layer 2 is made of a tinned copper wire.

In this embodiment, the wrapping layer 4 is a flame-retardant glass ribbon.

In this embodiment, the double-layer steel-tape armoring layer 3 is a galvanized steel tape.

In this embodiment, there are 3 conductors 9.

In this way, the electrical conductivity of the cable can be increased.

Finally, it should be noted that: various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, to the extent that such modifications and variations of the present invention fall within the scope of the present claims and their equivalents, it is intended that the present invention encompass such modifications and variations as well.

Claims

1. The utility model provides a fire-resistant control cable, its characterized in that includes oversheath layer (1), shielding layer (2), double-deck steel band armor (3) in proper order from outer to interior, around covering (4), inner sheath layer (5), filling layer (6) and conductor (9), conductor (9) outside from inside to outside cladding insulating layer (8), glass fiber braid over braid (7) in proper order, filling layer (6) wrap up in glass fiber braid over braid (7) are outside, the inner layer structure of cable is by the whole cladding of outer layer structure in proper order.

2. A fire resistant control cable according to claim 1, characterized in that the filler layer (6) is a asbestos fire retardant filler layer.

3. The fire-resistant control cable according to claim 1, wherein the insulating layer (8), the sheath layer (5) and the outer sheath layer (1) are special ceramic silicone rubber for fire-resistant wires and cables.

4. Fire resistant control cable according to claim 1, characterized in that the shielding layer (2) is made of tinned copper wire.

5. Fire resistant control cable according to claim 1, characterized in that the wrapping (4) is a fire retardant glass ribbon.

6. A fire resistant control cable according to claim 1, characterized in that the double steel tape armouring layer (3) is galvanized steel tape.

7. A fire resistant control cable according to claim 1, characterized in that there are 3 conductors (9).