CN217280194U

CN217280194U - Fire-resistant tensile cable

Info

Publication number: CN217280194U
Application number: CN202221113634.4U
Authority: CN
Inventors: 黄美华
Original assignee: CHONGQING KEBAO CABLE CO LTD
Current assignee: CHONGQING KEBAO CABLE CO LTD
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-08-23
Anticipated expiration: 2032-05-10

Abstract

The utility model discloses a fire-resistant tensile cable relates to the fire-resistant cable field, the technical scheme of the utility model include cable core, interior sheath, band layer, isolation flame retardant coating and outer jacket from inside to outside in proper order. The outer wall of the inner protection layer is spirally wound with a tensile cord, and magnesium hydroxide powder is arranged in a space formed by the tensile cord, the cable core and the inner protection layer. This scheme is through the outer wall spiral at the cable core around establishing tensile cotton rope, the holistic tensile strength of improvement cable that can show, simultaneously owing to set up the magnesium hydrate powder between inner sheath and cable core, can absorb heat and form moisture after the magnesium hydrate powder is heated, and the moisture that produces when cooling down to the cable can make it lose the environment of burning, and then plays fire-resistant cooling's effect.

Description

Fire-resistant tensile cable

Technical Field

The utility model relates to a fire-resistant tensile cable mainly relates to the fire-resistant cable field.

Background

The fire-resistant cable refers to a cable which can be burnt in bundles for a long time without short circuit or disconnection, when the cable is subjected to high temperature, the tensile strength of the cable can be reduced, and if the cable is in a state of bearing large tensile force, such as a cable with a suspended stay wire, disconnection is likely to occur due to self weight. Therefore, how to provide a cable with good flame retardant effect and better tensile property is a technical problem to be solved by the technical proposal.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to above prior art, the utility model provides a fire-resistant tensile cable, the outer wall spiral of cable core is around establishing tensile cotton rope, the holistic tensile strength of improvement cable that can show, simultaneously owing to set up the magnesium hydrate powder between sheath and cable core including, the magnesium hydrate powder can absorb heat and form moisture after being heated, and then plays fire-resistant cooling's effect.

In order to achieve the above purpose, the technical scheme of the utility model is that: the cable comprises a cable core, an inner protection layer, a belting layer, an isolation fire-resistant layer and an outer protection layer from inside to outside in sequence.

And a tensile cord is spirally wound on the outer wall of the inner protective layer, and magnesium hydroxide powder is arranged in a space formed by the tensile cord, the cable core and the inner protective layer.

The technical principle and the beneficial effects of the utility model are as follows:

this scheme is through the outer wall spiral at the cable core around establishing tensile cotton rope, the holistic tensile strength of improvement cable that can show, simultaneously owing to set up the magnesium hydrate powder between inner sheath and cable core, can absorb heat and form moisture after the magnesium hydrate powder is heated, and the moisture that produces when cooling down to the cable can make it lose the environment of burning, and then plays fire-resistant cooling's effect.

Preferably, the tensile cord is made of glass fiber. The glass fiber has good heat resistance and high strength, and can well play a role in tensile resistance.

Preferably, the inner protective layer is made of high-flame-retardant low-smoke halogen-free polyolefin material. The oxygen index is more than 38, and the thinnest point thickness is not less than 2 mm.

Preferably, the wrapping tape layer is made of a flame-retardant low-smoke halogen-free wrapping tape, the thickness of the wrapping tape is not less than 0.2mm, and the overlapping rate of the wrapping tape layer is not less than twenty-five percent.

Preferably, the isolating fire-resistant layer is formed by wrapping an inorganic double-layer mica tape, and the thickness of the isolating fire-resistant layer is not less than 0.4 mm. Has stronger insulating and flame-retardant effects.

Preferably, the outer protective layer is made of chlorinated polyethylene material, and the thickness of the outer protective layer is not less than 0.2 mm. Has good insulating and wear-resisting effects.

Preferably, the cable core comprises an inner conductor and an outer insulating layer, the conductor is formed by twisting a plurality of copper wires, and the insulating layer is made of polyvinyl chloride materials. On the one hand, the conductor has better toughness, and on the other hand, better tensile property can be brought.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only one of the drawings of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

The cable comprises a conductor 1, an insulating layer 2, magnesium hydroxide powder 3, an inner protective layer 4, a belting layer 5, an isolation refractory layer 6, an outer protective layer 7 and a tensile cord 8.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are merely preferred embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

As shown in figure 1, the embodiment of the utility model provides a cable core, interior sheath 4, band layer 5, isolation flame retardant coating 6 and outer jacket 7 include in proper order from inside to outside.

The outer wall of the inner protection layer 4 is spirally wound with a tensile cord 8, and a space formed by the tensile cord 8, the cable core and the inner protection layer 4 is internally provided with magnesium hydroxide powder 3.

This scheme is through the outer wall spiral at the cable core around establishing tensile cotton rope 8, the holistic tensile strength of improvement cable that can show, owing to set up magnesium hydrate powder 3 between inner sheath 4 and cable core simultaneously, can absorb heat and form moisture after magnesium hydrate powder 3 is heated, and the moisture that produces when cooling to the cable can make it lose the environment of burning, and then plays fire-resistant cooling's effect.

The tensile cord 8 is made of glass fiber. The glass fiber has good heat resistance and high strength, and can well play a role in tensile resistance.

The inner sheath layer 4 is made of high-flame-retardant low-smoke halogen-free polyolefin material. The oxygen index is more than 38, and the thinnest point thickness is not less than 2 mm.

The wrapping tape layer 5 is made of a flame-retardant low-smoke halogen-free wrapping tape, the thickness of the wrapping tape is not less than 0.2mm, and the overlapping rate of the wrapping tape is not less than twenty-five percent.

The isolating fire-resistant layer 6 is formed by wrapping an inorganic double-layer mica tape, and the thickness of the isolating fire-resistant layer is not less than 0.4 mm. Has stronger insulating and flame-retardant effects.

The outer protective layer 7 is made of chlorinated polyethylene material, and the thickness of the outer protective layer is not less than 0.2 mm. Has good insulating and wear-resisting effects.

The cable core comprises a conductor 1 of an inner layer and an insulating layer 2 of an outer layer, wherein the conductor 1 is formed by twisting a plurality of copper wires, the insulating layer 2 is made of polyvinyl chloride materials, and the thickness of the insulating layer 2 is not less than 0.4 mm. On the one hand the conductor 1 has a better toughness and on the other hand it can bring about a better tensile behaviour.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fire-resistant tensile cable is characterized by comprising a cable core, an inner protection layer, a belting layer, an isolation fire-resistant layer and an outer protection layer from inside to outside in sequence;

the outer wall of the inner protection layer is spirally wound with a tensile cord, and magnesium hydroxide powder is arranged in a space formed by the tensile cord, the cable core and the inner protection layer.

2. The fire-resistant tensile cable according to claim 1, wherein: the tensile cord is made of glass fiber.

3. The fire-resistant tensile cable according to claim 1, wherein: the inner protective layer is made of high-flame-retardant low-smoke halogen-free polyolefin material, the oxygen index of the inner protective layer is larger than 38, and the thinnest point thickness of the inner protective layer is not smaller than 2 mm.

4. The fire-resistant tensile cable according to claim 1, wherein: the wrapping tape layer is made of flame-retardant low-smoke halogen-free wrapping tapes, the thickness of the wrapping tape is not less than 0.2mm, and the overlapping rate of the wrapping tape layer is not less than twenty-five percent.

5. The fire-resistant tensile cable according to claim 1, wherein: the isolating fire-resistant layer is formed by wrapping an inorganic double-layer mica tape, and the thickness of the isolating fire-resistant layer is not less than 0.4 mm.

6. The fire-resistant tensile cable according to claim 1, wherein: the outer protective layer is made of chlorinated polyethylene material, and the thickness of the outer protective layer is not less than 0.2 mm.

7. The fire-resistant tensile cable according to claim 1, wherein: the cable core comprises an inner conductor and an outer insulating layer, the conductor is formed by twisting a plurality of copper wires, and the insulating layer is made of polyvinyl chloride materials.