CN212084686U

CN212084686U - Novel mineral insulation flexible fire-resistant cable

Info

Publication number: CN212084686U
Application number: CN202021165714.5U
Authority: CN
Inventors: 张军; 陈威; 王蕾; 田笑; 朱明澈
Original assignee: Anhui Shunxin Cable Co ltd
Current assignee: Anhui Shunxin Cable Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2020-12-04
Anticipated expiration: 2030-06-22

Abstract

The utility model relates to the technical field of cables, in particular to a novel mineral insulation flexible fire-resistant cable, which comprises a plurality of conductors, wherein the conductors are formed by twisting a plurality of flexible wires, a plurality of conductors are arranged in an annular shape, and a filling hose is coaxially arranged in an annular cavity of the conductors, an inner cavity of the filling hose is provided with a plurality of supporting bars, an inner insulating layer is sleeved outside the conductors, a mineral insulating layer is filled between the inner insulating layer and the conductors, a damp-proof layer is sleeved outside the inner insulating layer, a filling layer is filled between the damp-proof layer and the inner insulating layer, a water-resistant layer is wrapped on the outer wall of the damp-proof layer, a spiral armor layer is arranged on the outer wall of the water-resistant layer, an outer protective sleeve is sleeved on the outer wall of the spiral armor layer, and compared with the existing mineral insulation cable, the cable, the defect that the existing mineral insulated cable is poor in bending performance is overcome.

Description

Novel mineral insulation flexible fire-resistant cable

Technical Field

The utility model relates to a novel flexible fire resisting cable technical field of mineral insulation especially relates to a novel flexible fire resisting cable of mineral insulation.

Background

The mineral insulated cable is a cable which uses a copper sheath to wrap a copper conductor core wire and uses magnesium oxide powder as an inorganic insulating material to isolate a conductor and the sheath, and the outermost layer can be selected to be a proper protective sleeve according to requirements. Commonly known as MICC or MI cables. There is a similar cable in which the core and the insulating material are covered with metal instead of copper sheath, which is called mineral insulated metal sheath cable. The existing mineral insulated cable has better fireproof performance, but has the defects of difficult bending and laying due to insufficient flexibility of the whole cable caused by filling more mineral powder.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that the flexibility of the mineral insulated cable is not enough in the prior art, and providing a novel flexible fire-resistant cable of mineral insulated.

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

the utility model provides a novel flexible fire resisting cable of mineral insulation, includes many conductors, the conductor is formed by many flexible wire transposition, many conductors are cyclic annular setting, and coaxial being provided with the packing hose in its ring cavity, the inner chamber of packing hose is provided with many support bars, the outside cover of conductor is established by the internal insulation layer, it has mineral insulating layer to fill between internal insulation layer and the conductor, the outside cover of internal insulation layer is equipped with the dampproof course, it has the filling layer to fill between dampproof course and the internal insulation layer, the outer wall parcel of dampproof course has the water blocking layer, the outer wall of water blocking layer is provided with the spiral armor, the outer wall cover of spiral armor is equipped with outer protective sheath.

Preferably, the spiral armor layer is a steel wire arranged in a spiral shape.

Preferably, the water-resistant layer is formed by a water-resistant belt which is stranded and sleeved outside the moisture-proof layer.

Preferably, the inner insulating layer is a crosslinked polyethylene insulating layer, and the outer protective sleeve is a polyurethane protective layer.

The utility model provides a pair of novel flexible fire resisting cable of mineral insulation, beneficial effect lies in: through the outer wall parcel mineral insulation layer at the conductor, effectively promote whole cable's insulation and fire resistance, set up the packing hose simultaneously between many conductors, the packing hose makes the conductor inside have certain activity space, the packing hose warp when buckling the cable provides the required space of deformation, and change current armor and be the outside of spiral winding at the cable, the intensity of cable is guaranteed on the one hand to spiral helicine armor, can carry out the buckling of certain limit simultaneously, the current mineral insulated cable of contrast can carry out the buckling of certain angle when guaranteeing insulating and fire resistance, the current mineral insulated cable defect that the performance is poor of buckling has been solved.

Drawings

Fig. 1 is a schematic structural diagram of a novel mineral insulated flexible fire-resistant cable provided by the utility model.

In the figure: the cable comprises an outer protective sleeve 1, a spiral armor layer 2, a water-resistant layer 3, a moisture-proof layer 4, a filling layer 5, an inner insulating layer 6, a mineral insulating layer 7, a conductor 8, a filling hose 9 and a supporting bar 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1, a novel mineral insulation flexible fire resisting cable, including many conductors 8, conductor 8 is formed by many flexible wire transposition, many conductors 8 are cyclic annular setting, and coaxial being provided with packing hose 9 in its cyclic annular cavity, the inner chamber of packing hose 9 is provided with many support bars 10, conductor 8's outside cover is established by internal insulation 6, it has mineral insulating layer 7 to fill between internal insulation 6 and the conductor 8, the outside cover of internal insulation 6 is equipped with dampproof course 4, it has filling layer 5 to fill between dampproof course 4 and the internal insulation 6, the outer wall parcel of dampproof course 4 has water blocking layer 3, water blocking layer 3's outer wall is provided with spiral armor 2, the outer wall cover of spiral armor 2 is equipped with outer protective sheath 1.

The spiral armor layer 2 is a steel wire arranged spirally. The water-resistant layer 3 is formed by a water-resistant belt which is twisted and sleeved outside the moisture-resistant layer 4. The inner insulating layer 6 is a cross-linked polyethylene insulating layer, and the outer protective sleeve 1 is a polyurethane protective layer.

Outer wall parcel mineral insulation layer 7 at the conductor, effectively promote the insulation and the fire resistance of whole cable, set up packing hose 9 simultaneously between many conductors, packing hose 9 makes the conductor inside have certain activity space, packing hose 9 warp when buckling the cable and provides the required space of deformation, and change current armor and be the outside of spiral winding at the cable, the intensity of cable is guaranteed on the one hand to spiral helicine armor, can carry out the buckling of certain limit simultaneously, the current mineral insulation cable of contrast can carry out the buckling of certain angle when guaranteeing insulating and fire resistance, the current defect that mineral insulation cable bending performance is poor has been solved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a novel flexible fire resisting cable of mineral insulation, includes many conductors (8), conductor (8) are formed by many flexible wire transposition, its characterized in that, many conductor (8) are cyclic annular setting, and coaxial filling hose (9) that is provided with in its cyclic annular cavity, the inner chamber of filling hose (9) is provided with many spinal branchs strip (10), the outside cover of conductor (8) is established by internal insulation layer (6), it has mineral insulating layer (7) to fill between internal insulation layer (6) and conductor (8), the outside cover of internal insulation layer (6) is equipped with dampproof course (4), it has filling layer (5) to fill between dampproof course (4) and internal insulation layer (6), the outer wall parcel of dampproof course (4) has water blocking layer (3), the outer wall of water blocking layer (3) is provided with spiral armor (2), the outer wall of the spiral armor layer (2) is sleeved with an outer protective sleeve (1).

2. A new mineral insulated flexible fire resistant cable according to claim 1, characterized in that the spiral armor layer (2) is a steel wire in a spiral arrangement.

3. A new mineral insulated flexible fire resistant cable according to claim 1, characterized in that the water-blocking layer (3) consists of a water-blocking tape stranded around the moisture-blocking layer (4).

4. A new mineral insulated flexible fire resistant cable according to claim 1, characterized in that the inner insulation layer (6) is a cross-linked polyethylene insulation layer and the outer protective sheath (1) is a polyurethane protective layer.