CN210110368U

CN210110368U - Fire-resistant long-life cable wire with double-layer insulating sheath

Info

Publication number: CN210110368U
Application number: CN201921032769.6U
Authority: CN
Inventors: 刘军霞
Original assignee: Dexin Cable Group Co Ltd
Current assignee: Dexin Cable Group Co Ltd
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2020-02-21
Anticipated expiration: 2029-07-04

Abstract

The utility model discloses a double-layer insulation sheath fire-resistant long-life cable wire, which comprises a cable body, wherein the cable body comprises a cable core bundle, a water-resistant layer and an outer sheath, and the cable core bundle comprises a plurality of cable cores which are parallel to each other; still be provided with aluminium matter annular wave piece between water blocking layer and the oversheath, the quantity of aluminium matter annular wave piece is a plurality of and along the axis direction evenly distributed of cable body, the bottom of oversheath has the seam, and the oversheath establishes through the hoop that cracks on the aluminium matter annular wave piece, two adjacent aluminium matter annular wave pieces surround into the heat dissipation chamber with the oversheath jointly, the venthole with heat dissipation chamber one-to-one is seted up at the top of oversheath, and aluminium matter annular wave piece contacts with the water blocking layer, and outside air directly gets into the oversheath through cracking in with the heat transfer of water blocking layer and aluminium matter annular wave piece, very big promotion heat transfer effect, can effectively avoid the condition emergence of overheated damage.

Description

Fire-resistant long-life cable wire with double-layer insulating sheath

Technical Field

The utility model relates to a cable field, concretely relates to fire-resistant long-life cable wire of double-deck insulating sheath.

Background

Along with the development of the wire and cable manufacturing technology, the insulation performance and the fire resistance of the existing wire and cable are greatly improved, but the coating layers are more, so that the heat dissipation performance of the existing insulation fire-resistant cable is poor, the situation of overhigh temperature is easy to occur in the using process, and the existing insulation fire-resistant cable can be damaged due to self-heating in the serious situation.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the background art, the utility model aims to provide a fire-resistant long-life cable wire of double-deck insulating sheath, it has effectively solved the problem that exists among the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the cable wire with the double-layer insulation sheath and the fire-resistant long service life comprises a cable body, wherein the cable body comprises a wire core bundle, a water blocking layer and an outer sheath, the wire core bundle comprises a plurality of wire cores which are parallel to each other, the wire cores comprise wires, inner insulation sleeves covering the outer sides of the wires and outer insulation sleeves covering the outer sides of the inner insulation sleeves, and a fire-resistant material is filled between the outer insulation sleeves and the water blocking layer; the cable is characterized in that aluminum annular wave sheets are further arranged between the water-blocking layer and the outer sheath, the aluminum annular wave sheets are distributed uniformly in the axial direction of the cable body, a slot is formed in the bottom of the outer sheath, the outer sheath is arranged on the aluminum annular wave sheets in a hooped mode through the slot, two adjacent aluminum annular wave sheets and the outer sheath jointly enclose a heat dissipation cavity, and air outlet holes which correspond to the heat dissipation cavity in a one-to-one mode are formed in the top of the outer sheath.

Furthermore, the number of the wire cores is four.

Furthermore, the inner insulating sleeve and the outer insulating sleeve are made of polyvinyl chloride and crosslinked polyethylene respectively.

Further, the water-proof layer is a nylon sleeve coated with polyacrylate swelling fibers.

Further, the refractory material is ceramic silicon rubber.

Further, the outer sheath is made of silicon rubber.

Furthermore, a plurality of bulges are respectively arranged on two sides of the aluminum annular wave sheet.

Further, the protrusion is hemispherical.

Furthermore, a filter screen is fixedly arranged on the outer sheath, the filter screen completely covers the air outlet hole, and the filter screen is woven by nylon threads.

Furthermore, the mesh number of the filter screen is not less than 20 meshes.

The utility model discloses following beneficial technological effect has:

the utility model discloses in used the oversheath that has the bottom and crack and set up in the oversheath and the aluminium matter annular wave piece between the water blocking layer, aluminium matter annular wave piece and water blocking layer contact, the outside air is direct through cracking get into in the oversheath with the heat transfer of water blocking layer and aluminium matter annular wave piece, very big promotion the heat transfer effect, the condition that can effectively avoid overheated damage takes place.

Drawings

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

FIG. 2 is a sectional view taken along line A-A in FIG. 1;

fig. 3 is a schematic structural diagram of a top view according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a second embodiment of the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1-3, the cable wire with the double-layer insulation sheath and the fire-resistant long service life of the cable according to the embodiment includes a cable body 1, the cable body 1 includes a wire core bundle, a water-resistant layer 2 and an outer sheath 3, the water-resistant layer 2 is made of a nylon sheath coated with polyacrylate expanded fibers, the wire core bundle includes four wire cores parallel to each other, each wire core includes a wire 4, an inner insulation sheath 5 covering the outer side of the wire 4 and an outer insulation sheath 6 covering the outer side of the inner insulation sheath 5, the inner insulation sheath 5 and the outer insulation sheath 6 are made of polyvinyl chloride and cross-linked polyethylene respectively, and a ceramic silicon rubber fire-resistant material 7 is filled between the outer insulation sheath 6 and the water-resistant layer 2; an aluminum annular wave sheet 8 is further arranged between the water-resistant layer 2 and the outer sheath 3, the aluminum annular wave sheet 8 is a complete circular ring and the circular ring surface is wavy and bent, so that the heat exchange area of air is effectively increased, the heat of the aluminum annular wave sheet 8 is favorably taken away, the aluminum annular wave sheet 8 is fixedly adhered on the water-resistant layer 2, the aluminum annular wave sheets 8 are distributed uniformly along the axial direction of the cable body 1, the bottom of the outer sheath 3 is provided with a slit 9, the outer sheath 3 is hooped on the aluminum annular wave sheet 8 through the slit 9, outside air can directly enter the outer sheath 3 through the slit 9 to ensure the air quantity participating in heat exchange, two adjacent aluminum annular wave sheets 8 and the outer sheath 3 jointly form a heat dissipation cavity 10, the top of the outer sheath 3 is provided with air outlet holes 11 corresponding to the heat dissipation cavities 10 one by one, and the two air outlet holes 11 corresponding to each heat dissipation cavity 10 are, ensuring the gas output.

The outer sheath 3 is made of silicon rubber, the silicon rubber has soft molecular chains, small intermolecular attraction and low surface tension, has high compression deformation resistance, low-temperature elasticity, high plasticity and special surface self-lubrication, is not easy to adhere dust, and can work in severe environments of high and low temperatures.

A plurality of protrusions 12 are respectively arranged on two sides of the aluminum annular wave sheet 8, and the protrusions 12 are hemispherical, so that the heat exchange area between the aluminum annular wave sheet 8 and air is further increased.

The outer sheath 3 is further fixedly provided with the filter screen 13, so that external dust and impurities are prevented from easily entering the outer sheath 3, the surface of the aluminum annular wave sheet 8 is clean, the influence on the heat exchange efficiency of the aluminum annular wave sheet 8 and air is avoided, the filter screen 13 is preferably a whole piece with the same length as the cable body 1, the filter screen 13 completely covers the air outlet 11, the filter screen 13 can be woven by nylon threads, the bending performance of the cable body 1 is not influenced, and the mesh number of the filter screen 13 is not smaller than 20 meshes.

The working principle of the embodiment is as follows:

the outside air enters each heat dissipation cavity 10 from the slit 9 at the bottom of the outer sheath 3 and exchanges heat with the aluminum annular wave sheet 8 and the water-blocking layer 2, the temperature of the air after heat exchange rises, and the specific gravity of the hot air is lower than that of the cold air, so the hot air can spontaneously flow out through the air outlet holes 11, in the process, the air takes away part of heat generated by the wires 4 and conducted to the outside, the damage of the cable body 1 caused by overhigh temperature is avoided, and the heat-insulating.

Example two

As shown in fig. 4, the difference between the present embodiment and the first embodiment is that an aluminum hoop 14 is further welded at the root of the aluminum annular wave sheet 8, the aluminum hoop 14 is sleeved outside the water blocking layer 2 and is bonded and fixed, the contact area between the aluminum hoop 14 and the water blocking layer 2 is large, so that the aluminum hoop 14 can absorb the heat of the water blocking layer 2 more effectively, and because the heat conduction efficiency between the aluminum hoop 14 and the aluminum annular wave sheet 8 is high, compared with the simple aluminum annular wave sheet 8, the aluminum annular wave sheet 8 with the aluminum hoop 14 can better absorb and dissipate the heat of the water blocking layer 2, thereby further avoiding the situation that the temperature of the cable body 1 is too high.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The cable wire with the double-layer insulation sheath and the fire-resistant long service life comprises a cable body and is characterized in that the cable body comprises a wire core bundle, a water-resistant layer and an outer sheath, wherein the wire core bundle comprises a plurality of wire cores which are parallel to each other, each wire core comprises a wire, an inner insulation sleeve covering the outer side of the wire and an outer insulation sleeve covering the outer side of the inner insulation sleeve, and a fire-resistant material is filled between the outer insulation sleeve and the water-resistant layer; the cable is characterized in that aluminum annular wave sheets are further arranged between the water-blocking layer and the outer sheath, the aluminum annular wave sheets are distributed uniformly in the axial direction of the cable body, a slot is formed in the bottom of the outer sheath, the outer sheath is arranged on the aluminum annular wave sheets in a hooped mode through the slot, two adjacent aluminum annular wave sheets and the outer sheath jointly enclose a heat dissipation cavity, and air outlet holes which correspond to the heat dissipation cavity in a one-to-one mode are formed in the top of the outer sheath.

2. The double layer insulation sheath fire resistant long life cable wire of claim 1 wherein the number of cores is four.

3. The cable wire with double-layer insulation sheath, fire resistance and long service life as claimed in claim 1, wherein the inner insulation sheath and the outer insulation sheath are made of polyvinyl chloride and crosslinked polyethylene, respectively.

4. The double layer insulation jacketed fire-resistant long-life cable wire of claim 1, wherein the water-resistant layer is a polyacrylate expanded fiber coated nylon jacket.

5. The double layer insulation sheath fire resistant long life cable wire of claim 1 wherein said fire resistant material is ceramic silicone rubber.

6. The cable wire with double-layer insulation sheath, fire resistance and long service life as claimed in claim 1, wherein the outer sheath is made of silicone rubber.

7. The double-layer insulating sheath fire-resistant long-life cable and wire as claimed in claim 1, wherein a plurality of projections are provided on both sides of the aluminum annular wavy sheet, respectively.

8. The double layer insulation sheath fire resistant long life cable wire of claim 7 wherein said protrusion is hemispherical.

9. The double-layer insulation sheath fire-resistant long-life cable wire according to claim 1, wherein a filter screen is further fixed on the outer sheath, and the filter screen completely covers the air outlet.

10. The double layer insulation sheath fire resistant long life cable wire of claim 9 wherein said screen mesh is no less than 20 mesh.