CN211604746U

CN211604746U - Flexible mineral insulation fireproof cable

Info

Publication number: CN211604746U
Application number: CN201922391562.4U
Authority: CN
Inventors: 苑中才
Original assignee: Linyi Qiyang Cable Co ltd
Current assignee: Linyi Qiyang Cable Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-09-29
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses a flexible mineral insulation fireproof cable, which comprises three conductors, wherein a mineral insulation material sheath is wrapped outside each conductor, and the three conductors wrapped with the mineral insulation material sheaths are positioned in a triangular insulation fireproof sleeve in a sleeving manner; a mica tape insulating layer is sleeved outside the triangular insulating fireproof sleeve, a polyethylene insulating isolation layer is sleeved outside the mica tape insulating layer, an inorganic mineral material filling fireproof layer is sleeved outside the polyethylene insulating isolation layer, an armor layer is sleeved outside the inorganic mineral material filling fireproof layer, and a low-smoke halogen-free outer sheath layer is sleeved outside the armor layer; the flexible mineral insulation fireproof cable is better in pressure bearing performance and better in fireproof and insulating performance.

Description

Flexible mineral insulation fireproof cable

Technical Field

The utility model relates to a fireproof cable especially relates to a flexible mineral insulation fireproof cable, belongs to various mud preparation equipment technical field.

Background

The mineral insulated cable is a special cable which can resist continuous operation temperature up to 250 ℃, so the mineral insulated cable is widely applied to the fields of high-rise buildings, petrochemical industry, airports, tunnels, ships, offshore oil platforms, aerospace, ferrous metallurgy and the like. Especially in tunnel, chemical industry oil and other inflammable and explosive occasions, need to guarantee the normal use under the condition of suffering striking, fire and burn etc., but most mineral insulated cable at present produce deformation easily when bearing radial striking, lead to the cable inlayer to damage, make fireproof cable lose electric property, patent No. 201920625238.1, the patent of patent name "a flexible mineral insulated fireproof cable of resistance to compression", its inner structure adopts triangle-shaped supporting sleeve structure, but three angles of this triangle-shaped supporting sleeve all are sharp acute angle, such structure, make overall structure still can damage the conductor part in triangle-shaped supporting sleeve structure when suffering radial striking easily, consequently, still need further improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to above-mentioned problem, provide a flexible mineral insulation fireproof cable, this flexible mineral insulation fireproof cable's bearing performance is better, possesses better fire prevention insulating properties moreover.

In order to achieve the technical purpose, the utility model discloses a flexible mineral insulation fireproof cable, which comprises three conductors formed by hinging a plurality of copper wires, wherein a mineral insulation material sheath is wrapped outside each conductor, and the three conductors wrapped with the mineral insulation material sheaths are positioned in a triangular insulation fireproof sleeve in a sleeving manner; the outside cover of the insulating fire prevention cover of three horn shapes is equipped with the mica tape insulating layer, mica tape insulating layer overcoat is equipped with the insulating isolation layer of polyethylene, the insulating isolation layer overcoat of polyethylene is equipped with inorganic mineral material and fills the flame retardant coating, inorganic mineral material fills the flame retardant coating overcoat and is equipped with the armor, the armor overcoat is equipped with low smoke and zero halogen oversheath layer.

As an improvement of the utility model, the outside of the triangular insulating fireproof sleeve and the inside of the mica tape insulating layer are filled with a fireproof insulating powder filling layer.

As a further improvement of the utility model, the tops of the three corners of the triangular insulating fireproof sleeve are in circular arc transition, and the circular arc transition part is in close contact with the partial inner wall of the mica tape insulating layer.

Preferably, the three mineral insulating material sheaths wrapped by the three conductors respectively keep a distance of 0.6-1.2 cm.

As a further preferred aspect of the present invention, the fireproof insulating powder filling layer mainly comprises perlite powder, asbestos powder, epoxy resin powder and chlorinated paraffin.

After the structure is adopted, the utility model has the advantages of as follows:

1. the utility model adopts circular arc transition at three corners of the triangular insulating fireproof sleeve and is closely contacted with part of the inner wall of the mica tape insulating layer, thus greatly improving the overall radial bearing performance of the cable;

2. the utility model separates three conductors by a section, which can not contact with each other all the time, and further improves the excellent electric performance of the conductor;

3. the utility model discloses add in inside and establish the insulating powder filling layer of fire prevention, then can save material cost, then can further improve the holistic fire prevention insulating properties of cable.

Drawings

Fig. 1 is a cross-sectional view of the cross-sectional structure of the present invention;

wherein, 1, a conductor; 2. a mineral insulation material sheath; 3. a triangular insulating fireproof sleeve; 4. a mica tape insulating layer; 5. a polyethylene insulating barrier layer; 6. inorganic mineral material fills the fire barrier; 7. an armor layer; 8. a low smoke zero halogen outer jacket layer; 9. and a fireproof insulating powder filling layer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

As can be seen from fig. 1, a flexible mineral-insulated fireproof cable comprises three conductors 1 formed by twisting a plurality of copper wires, in the present invention, a mineral-insulated sheath 2 is wrapped outside each conductor 1, and the three conductors 1 wrapped with the mineral-insulated sheath 2 are all located in a triangular-shaped insulated fireproof sleeve 3 in a sleeving manner; in the utility model, the three mineral insulating material sheaths 2 wrapped by the three conductors 1 respectively keep a distance of 0.6-1.2 cm. The utility model discloses it is concrete to separate one section between three conductors, makes the three can not contact all the time, and this structure has further improved the good electric property of conductor.

This insulating fire jacket of triangle-shaped 3's outside cover is equipped with mica tape insulating layer 4, does the utility model discloses an improvement part, between the outside of insulating fire jacket of triangle-shaped 3 and mica tape insulating layer 4 is inside, it has fire prevention insulating powder filling layer 9 to fill to and all be the circular arc transition at the top at three angles of insulating fire jacket 3 of triangle-shaped, and the partial inner wall in close contact with of three circular arc transition part and mica tape insulating layer 4.

In the structure, the three corners of the triangular insulating fireproof sleeve 3 are in arc transition and are in close contact with the partial inner wall of the mica tape insulating layer 4, so that the structure greatly improves the overall radial pressure-bearing performance of the cable.

The utility model discloses in, preferred fire prevention insulating powder filling layer 9 mainly comprises pearlite powder, asbestos powder, epoxy powder and chlorinated paraffin, adds in inside and establishes the insulating powder filling layer of fire prevention, and one then can save material cost, then can further improve the holistic fire prevention insulating properties of cable two.

Be equipped with polyethylene insulation isolation layer 5 at 4 overcoat of mica tape insulating layer, be equipped with inorganic mineral material at 5 overcoat of polyethylene insulation isolation layer and fill flame retardant coating 6, fill the flame retardant coating 6 overcoat at inorganic mineral material and be equipped with armor 7, be equipped with low smoke and zero halogen oversheath layer 8 simultaneously at 7 overcoat of armor. In the present invention, the mentioned armor layer 7 can be copper armor layer, and can also be mixed metal armor layer.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A flexible mineral insulation fireproof cable comprises three conductors which are formed by hinging a plurality of copper wires, and is characterized in that a mineral insulation material sheath is wrapped outside each conductor, and the three conductors wrapped with the mineral insulation material sheaths are positioned in a triangular insulation fireproof sleeve in a sleeving manner; the outside cover of the insulating fire prevention cover of three horn shapes is equipped with the mica tape insulating layer, mica tape insulating layer overcoat is equipped with the insulating isolation layer of polyethylene, the insulating isolation layer overcoat of polyethylene is equipped with inorganic mineral material and fills the flame retardant coating, inorganic mineral material fills the flame retardant coating overcoat and is equipped with the armor, the armor overcoat is equipped with low smoke and zero halogen oversheath layer.

2. The flexible mineral-insulated fireproof cable according to claim 1, wherein a fireproof insulating powder filling layer is filled between the outside of the triangular-shaped insulating fireproof sheath and the inside of the mica tape insulating layer.

3. The flexible mineral-insulated fireproof cable according to claim 1, wherein the triangular-shaped insulating fireproof sheath has circular arc transition at the top of each of the three corners, and the circular arc transition portion is in close contact with part of the inner wall of the mica tape insulating layer.

4. A flexible mineral insulated fireproof cable according to claim 1, wherein the three sheaths of mineral insulating material around which the three conductors are wrapped are all maintained at a distance of 0.6-1.2 cm.

5. The flexible mineral insulated fireproof cable of claim 2, wherein the fireproof insulating powder filling layer is mainly composed of perlite powder, asbestos powder, epoxy resin powder, and chlorinated paraffin.