CN213958645U

CN213958645U - Fire-resistant cable

Info

Publication number: CN213958645U
Application number: CN202120267486.0U
Authority: CN
Inventors: 李强; 冉春风; 赵强; 夏卫
Original assignee: Jiangsu Tin Cable Special Cable Co Ltd
Current assignee: Jiangsu Tin Cable Special Cable Co Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-08-13
Anticipated expiration: 2031-01-29

Abstract

The utility model discloses a fire-resistant cable, which comprises an insulating sheath layer, wherein the inner side wall of the insulating sheath layer is fixedly sleeved with an armor, the inner side wall of the armor is fixedly sleeved with a fire-resistant belting layer, the inner side of the fire-resistant belting layer is provided with a heat-insulating layer, a main reinforcing rib is arranged between the fire-resistant belting layer and the heat-insulating layer, the inner side wall of the heat-insulating layer is fixedly provided with an electromagnetic shielding layer, the inner side of the electromagnetic shielding layer is provided with an inner core component, the main reinforcing rib is fixedly connected with the auxiliary reinforcing rib through the fire-resistant belting layer by being provided with a main reinforcing rib and an auxiliary reinforcing rib, a clamping groove is arranged at the corresponding position of the outer surface of the heat-insulating layer and the main reinforcing rib, the main reinforcing rib is positioned through the clamping groove, and an auxiliary reinforcing rib is arranged between every two main reinforcing ribs, a reinforcing rib structure is formed between the main reinforcing rib and the auxiliary reinforcing rib, so that the cable can be effectively prevented from being excessively bent, the guide core in the cable is protected, and the guide core is prevented from being damaged, so that the cable cannot be normally used.

Description

Fire-resistant cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a fire resisting cable.

Background

The cable is an electric energy or signal transmission device, usually it is made up of several or several groups of wire, the manufacturing of the wire and cable is totally different from the production mode of most electromechanical products, the electromechanical products usually adopt assembling the parts into parts, assembling the parts into a single product, the product is measured by the number of pieces or number of pieces, the wire and cable is the basic measuring unit of length, all the wire and cable are from the conductor processing, add insulation, shielding, cabling, protective layer, etc. to the periphery of the conductor layer by layer, the product structure is more complicated, the more the superimposed layer, with the rapid development of the power cable burying and laying project, the higher requirement to the cable protection, the cable protective sleeve is made up of polyethylene PE and high quality steel pipe through the processes of shot blasting pretreatment, dipping plastic or painting, heating and solidifying, it is the most commonly used electrical insulating tube for protecting wires and cables, and is widely used because of its good insulating properties, high chemical stability, non-rusting, non-aging, and adaptability to harsh environments.

The problem that present fire resisting cable exists is, does not set up corresponding bending-proof structure in the cable body, excessively buckles when the cable, can make the conductor lead the core receive certain harm in the cable, therefore we propose a new fire resisting cable and solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a fire-resistant cable.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a fire-resistant cable, includes the insulating restrictive coating, the fixed armoring that has cup jointed of insulating restrictive coating inside wall, the fixed fire-resistant band layer that has cup jointed of armor inside wall, fire-resistant band layer inboard is provided with the insulating layer, be provided with main strengthening rib between fire-resistant band layer and the insulating layer, insulating layer inside wall fixed mounting has the electromagnetic shield layer, electromagnetic shield layer inboard is provided with inner core assembly.

As a further description of the above technical solution:

the insulating sheath layer is made of irradiation crosslinking halogen-free flame retardant polyolefin material.

As a further description of the above technical solution:

the quantity of main strengthening rib is three groups, and three main strengthening ribs of group are annular evenly distributed, are provided with vice strengthening rib between every two sets of adjacent main strengthening rib.

As a further description of the above technical solution:

the peripheral outer surface of the heat insulation layer is provided with a clamping groove corresponding to the main reinforcing rib.

As a further description of the above technical solution:

the electromagnetic shielding layer is formed by weaving copper wires, and a filling material is arranged between the electromagnetic shielding layer and the inner core inner sheath layer.

As a further description of the above technical solution:

the inner core subassembly includes inner core inner sheath layer, the fixed heat-resisting mica layer that has cup jointed of inner core inner sheath layer inside wall, heat-resisting mica layer inside wall fixed mounting has the core of leading.

As a further description of the above technical solution:

the guide core is made of aluminum alloy.

The utility model discloses following beneficial effect has:

compared with the prior art, this kind of fire resisting cable's advantage lies in, through being provided with devices such as main strengthening rib and vice strengthening rib, main strengthening rib passes through fire-resistant band layer looks fixed connection, and the draw-in groove has been seted up with the corresponding position of main strengthening rib at the insulating layer surface, fix a position main strengthening rib through the draw-in groove, and be provided with vice strengthening rib between two liang of main strengthening ribs, constitute the strengthening rib structure between main strengthening rib and the vice strengthening rib, can prevent effectively that the cable from excessively buckling, lead the core to cable inside and protect, it is impaired to prevent to lead the core, cause the unable normal use of cable.

Drawings

Fig. 1 is a schematic cross-sectional structure view of a fire-resistant cable according to the present invention;

fig. 2 is a schematic cross-sectional structure diagram of the core guiding assembly.

Illustration of the drawings:

1. an insulating sheath layer; 2. armoring; 3. a refractory belting layer; 4. a main reinforcing rib; 5. a secondary reinforcing rib; 6. a thermal insulation layer; 7. an electromagnetic shielding layer; 8. a filler material; 9. an inner core inner sheath layer; 10. a heat-resistant mica layer; 11. a guide core; 12. an inner core assembly.

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. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, the present invention provides an embodiment: the utility model provides a fire-resistant cable, includes a fire-resistant cable, including insulating restrictive coating 1, the fixed cover of 1 inside wall of insulating restrictive coating has cup jointed

armor

2, and 2 inside walls of armor are fixed to have cup jointed fire-

resistant band layer

3, and 3 inboards of fire-resistant band layer are provided with insulating layer 6, are provided with main strengthening rib 4 between fire-resistant band layer 3 and the

insulating layer

6, and 6 inside wall fixed mounting of insulating layer have

electromagnetic shield layer

7, and 7 inboards of electromagnetic shield layer are provided with inner core assembly 12.

The insulating sheath layer 1 is an irradiation crosslinking halogen-free flame-retardant polyolefin material, the irradiation crosslinking low-smoke halogen-free flame-retardant cable has the advantages that the traditional non-crosslinking temperature-resistant grade is improved to 90-135 ℃ from 70 ℃, the irradiation crosslinking low-smoke halogen-free flame-retardant cable has good temperature-resistant grade and large carrying capacity, the cable can still be normally used for a period of time after being contacted with flame, the insulation resistance is increased, in addition, the cable greatly prolongs the service life of cyclic heating of the cable in the use process due to high temperature-resistant grade and high aging temperature, the cable has the advantages of long service life and strong overload capacity, meanwhile, the material is environment-friendly and has low smoke amount caused by nontoxic combustion, the number of the main reinforcing ribs 4 is three, the three groups of main reinforcing ribs 4 are annularly and uniformly distributed, the auxiliary reinforcing ribs 5 are arranged between every two adjacent groups of main reinforcing ribs 4, and the reinforcing rib structure consisting of the auxiliary reinforcing ribs 5 and the, can prevent the cable from excessively bending, avoid influencing the inner core inside the cable, guarantee the normal use of the cable, the peripheral outer surface of the heat-insulating layer 6 is provided with a clamping groove corresponding to the main reinforcing rib 4, the main reinforcing rib 4 is conveniently clamped into the heat-insulating layer 6 through the clamping groove, the main reinforcing rib 4 is positioned through the clamping groove of the heat-insulating layer 6, the electromagnetic shielding layer 7 is woven by copper wire tapes, a filling material 8 is arranged between the electromagnetic shielding layer 7 and the inner core inner sheath layer 9, the current passing through the cable is large, a magnetic field can be generated around the current, the magnetic field is shielded through the electromagnetic shielding layer 7 without influencing other elements, the electromagnetic field can be shielded in the cable through the electromagnetic shielding layer 7, the inner core assembly 12 comprises the inner core inner sheath layer 9, the inner side wall of the inner core inner sheath layer 9 is fixedly sleeved with a heat-resistant mica layer 10, the inner side wall of the heat-resistant mica layer 10 is fixedly provided with a guide core 11, the guide core 11 is made of aluminum alloy, so that the cost performance of the aluminum alloy is higher, the production and installation cost can be greatly reduced, and the guide core has better corrosion resistance.

The working principle is as follows: this kind of fire resisting cable compares with traditional fire resisting cable, main strengthening rib 4 and vice strengthening rib 5 have been set up in cable inside, main strengthening rib 4 fixes a position fixedly between fire-resistant band layer 3 and insulating layer 6, vice strengthening rib 5 has been set up again between main strengthening rib 4, the strengthening rib structure has been constituteed between main strengthening rib 4 and the vice strengthening rib 5, when the cable is excessively buckled, can be because the effect of strengthening rib structure can't continue to buckle down, lead core 11 to cable inside and protect, prevent its damage, also can prevent the damage of other inside layers of cable.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A fire-resistant cable, includes insulating sheath layer (1), its characterized in that: insulating restrictive coating (1) inside wall is fixed to be cup jointed armor (2), armor (2) inside wall is fixed to be cup jointed fire-resistant band layer (3) fixed, fire-resistant band layer (3) inboard is provided with insulating layer (6), be provided with main strengthening rib (4) between fire-resistant band layer (3) and insulating layer (6), insulating layer (6) inside wall fixed mounting has electromagnetic shield layer (7), electromagnetic shield layer (7) inboard is provided with inner core subassembly (12).

2. The fire resistant cable of claim 1, wherein: the insulating sheath layer (1) is made of irradiation crosslinking halogen-free flame-retardant polyolefin material.

3. The fire resistant cable of claim 1, wherein: the number of main strengthening rib (4) is three groups, and three main strengthening rib of group (4) are annular evenly distributed, are provided with vice strengthening rib (5) between every adjacent two sets of main strengthening rib (4).

4. The fire resistant cable of claim 1, wherein: the peripheral outer surface of the heat insulation layer (6) is provided with a clamping groove corresponding to the main reinforcing rib (4).

5. The fire resistant cable of claim 1, wherein: the electromagnetic shielding layer (7) is formed by weaving copper wires, and a filling material (8) is arranged between the electromagnetic shielding layer (7) and the inner core inner sheath layer (9).

6. The fire resistant cable of claim 1, wherein: inner core subassembly (12) include inner core inner sheath layer (9), heat-resisting mica layer (10) have been cup jointed to inner core inner sheath layer (9) inside wall fixed, heat-resisting mica layer (10) inside wall fixed mounting leads core (11).

7. The fire resistant cable of claim 6, wherein: the guide core (11) is made of aluminum alloy.