CN219626368U

CN219626368U - Fire-resistant type low-voltage cable

Info

Publication number: CN219626368U
Application number: CN202320797984.5U
Authority: CN
Inventors: 闫世儒; 刘立权
Original assignee: Rongmao Technology Group Co ltd
Current assignee: Rongmao Technology Group Co ltd
Priority date: 2023-04-12
Filing date: 2023-04-12
Publication date: 2023-09-01
Anticipated expiration: 2033-04-12

Abstract

The utility model discloses a fire-resistant type low-voltage cable, which comprises an inner core and an outer skin, wherein the outer skin is wrapped on the inner core; still include first protection machanism, second protection machanism and third protection machanism, first protection machanism parcel sets up in the outside of inner core, and the second protection machanism parcel sets up in the outside of first protection machanism, and third protection machanism sets up in the outside of second protection machanism. According to the utility model, the fire resistance of the cable is improved through the first fire resistant layer and the second fire resistant layer, the inner cores are clamped on the clamping grooves of the inner frame, so that the mutual extrusion abrasion between the inner cores is effectively prevented, the service life of the cable is prolonged, the resistance of the cable to external extrusion can be effectively improved through the inner frame, and the cable has high practicability.

Description

Fire-resistant type low-voltage cable

Technical Field

The utility model relates to the technical field of wires and cables, in particular to a fire-resistant type low-voltage wire and cable.

Background

The cable is a conductor which is used for transmitting electric power or signal current and signal voltage and is covered with an insulating layer, a protective layer, a shielding layer and the like, can be divided into a high-voltage cable and a low-voltage cable according to voltage, has the characteristics of reliable operation, no standing pole, no occupied area, no interference with the look, small influence from the outside and the like, is widely applied to a low-voltage distribution system, and is a fire-resistant cable which can be safely operated for a certain time under the condition of flame combustion.

In the prior art, the patent with the application number of 201811036157.4 discloses a fire-resistant type cable with higher production efficiency, lower production cost and better fire resistance, and the wrapping tape only needs to be sequentially wrapped outside the ceramic silica gel band without covering. However, the protection of the cable to the internal conductive copper core is common, most of the existing cables on the market are composed of a plurality of groups of conductive inner cores, and the conductive inner cores are easy to squeeze and wear mutually when in use, so that the safe and normal operation of the cable is affected.

Disclosure of Invention

The utility model aims to provide a fireproof type low-voltage cable with better protection for an inner core.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows.

A fire-resistant type low-voltage cable comprises an inner core and an outer skin, wherein the outer skin is wrapped on the inner core; the novel protective device comprises an inner core, and is characterized by further comprising a first protective mechanism, a second protective mechanism and a third protective mechanism, wherein the first protective mechanism is wrapped and arranged outside the inner core, the second protective mechanism is wrapped and arranged outside the first protective mechanism, and the third protective mechanism is arranged outside the second protective mechanism; when using fire-resistant type low-voltage wire cable, improve the fire resistance of cable through first flame retardant coating and second flame retardant coating, through with the inner core clamping on the draw-in groove of inner frame, effectively prevent mutual extrusion wearing and tearing between the inner core to prolong its life, and can effectively improve the cable through the inner frame and to the external extruded resistance performance, the practicality is stronger.

Preferably, the first protection mechanism comprises a first refractory layer and a first insulating layer, the first refractory layer is wrapped and arranged outside the inner core, and the first insulating layer is wrapped and arranged outside the first refractory layer; the inner core is protected by a first refractory layer.

Preferably, the second protection mechanism comprises an inner frame and a filling layer, three groups of clamping grooves are formed in the middle of the inner frame and distributed on the inner frame in an equilateral triangle manner, three groups of inner cores are arranged, each group of inner cores are positioned in one group of clamping grooves, and the filling layer is wrapped and arranged outside the inner cores and the inner frame; the inner cores are separated through the inner frame, so that mutual extrusion abrasion between the inner cores is prevented.

Preferably, the third protection mechanism comprises a second refractory layer, a second insulating layer and an armor layer, wherein the second refractory layer is wrapped and arranged outside the filling layer, the second insulating layer is wrapped and arranged outside the second refractory layer, the armor layer is wrapped and arranged outside the second insulating layer, and the outer skin is wrapped and arranged outside the armor layer; the fire resistance of the cable is further improved through the second fire resistant layer, and the strength of the cable is enhanced through the armor layer.

Preferably, the insulation layer further comprises reinforcing ribs, wherein at least six groups of reinforcing ribs are arranged, and the six groups of reinforcing ribs are uniformly distributed outside the second insulation layer; the six groups of reinforcing ribs are distributed in the cable, so that the tensile strength of the cable can be effectively enhanced, and the cable can bear larger tensile force when being paved.

Preferably, an inner hole is arranged in the middle of the inner frame; the ability of the cable to withstand external pressure is enhanced by the arrangement described above.

Preferably, the filling layer adopts flame-retardant filler; the fire resistance of the cable is enhanced by the arrangement described above.

Preferably, the first refractory layer and the second refractory layer are both formed by winding mica tapes.

By adopting the technical scheme, the utility model has the following technical progress.

According to the utility model, the fire resistance of the cable is improved through the first fire resistant layer and the second fire resistant layer, the inner cores are clamped on the clamping grooves of the inner frame, so that the mutual extrusion abrasion between the inner cores is effectively prevented, the service life of the cable is prolonged, the resistance of the cable to external extrusion can be effectively improved through the inner frame, and the cable has high practicability.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the inner frame of the present utility model;

FIG. 3 is a schematic top view of the present utility model;

FIG. 4 is an enlarged schematic view of the structure of FIG. 1A;

wherein: 1. an inner core; 2. a skin; 3. a first refractory layer; 4. a first insulating layer; 5. an inner frame; 6. a filling layer; 7. a second refractory layer; 8. a second insulating layer; 9. an armor layer; 10. reinforcing ribs.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description.

Example 1

A fire-resistant type low-voltage cable comprises an inner core 1, a first protection mechanism of an outer skin 2, a second protection mechanism and a third protection mechanism.

The outer skin 2 is wrapped and arranged on the inner core 1; the first protection mechanism package sets up in the outside of inner core 1, and the second protection mechanism package sets up in the outside of first protection mechanism, and the third protection mechanism sets up in the outside of second protection mechanism.

The first protection mechanism comprises a first refractory layer 3 and a first insulating layer 4, wherein the first refractory layer 3 is wrapped and arranged outside the inner core 1, and the first insulating layer 4 is wrapped and arranged outside the first refractory layer 3.

The third protection machanism includes second flame retardant coating 7, second insulating layer 8, armor 9 and strengthening rib 10, and the second flame retardant coating 7 parcel sets up in the outside of filling layer 6, and the second insulating layer 8 parcel sets up in the outside of second flame retardant coating 7, and the armor 9 parcel sets up in the outside of second insulating layer 8, and the crust 2 parcel sets up in the outside of armor 9.

The reinforcing ribs 10 are provided with at least six groups, and the six groups of reinforcing ribs 10 are uniformly distributed outside the second insulating layer 8.

The first refractory layer 3 and the second refractory layer 7 are both formed by winding mica tapes.

The fire resistance of the cable is enhanced through the first fire resistant layer and the second fire resistant layer, and meanwhile, the insulation performance of the cable is improved through the first insulation layer and the second insulation layer.

Example 2

This embodiment differs from embodiment 1 in that: the second protection mechanism comprises an inner frame 5 and a filling layer 6, wherein three groups of clamping grooves are formed in the middle of the inner frame 5 and distributed on the inner frame 5 in an equilateral triangle mode, the inner cores 1 are provided with three groups, each group of inner cores 1 are located in one group of clamping grooves, and the filling layer 6 is wrapped outside the inner cores 1 and the inner frame 5. An inner hole is arranged in the middle of the inner frame 5, and a flame-retardant filler is adopted as the filling layer 6.

Separate the inner core through the inner frame, effectively prevent mutual extrusion wearing and tearing between the three inner cores of group, protect the inner core, when the cable received outside extrusion simultaneously, can disperse the pressure through the hole deformation on the inner frame, reduce the extrusion damage to the inner core.

As shown in fig. 1 to 4, when the fire-resistant type cable is used, the fire resistance of the cable is improved through the first fire-resistant layer 3 and the second fire-resistant layer 7, the inner cores 1 are clamped on the clamping grooves of the inner frame 5, so that the mutual extrusion abrasion between the inner cores 1 is effectively prevented, the service life of the cable is prolonged, the resistance of the cable to external extrusion can be effectively improved through the inner frame 5, and the practicability is high.

The first refractory layer, the second refractory layer, the first insulating layer and the second insulating layer of the utility model are purchased on the market, and the first refractory layer, the second insulating layer and the second insulating layer are only required to be installed and operated according to the attached use instructions by a person skilled in the art without creative labor of the person skilled in the art.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. A fire-resistant type low-voltage cable comprises an inner core (1) and an outer skin (2), wherein the outer skin (2) is wrapped on the inner core (1); the novel protective device is characterized by further comprising a first protective mechanism, a second protective mechanism and a third protective mechanism, wherein the first protective mechanism is wrapped and arranged outside the inner core (1), the second protective mechanism is wrapped and arranged outside the first protective mechanism, and the third protective mechanism is arranged outside the second protective mechanism;

the first protection mechanism comprises a first fire-resistant layer (3) and a first insulating layer (4), wherein the first fire-resistant layer (3) is wrapped and arranged outside the inner core (1), and the first insulating layer (4) is wrapped and arranged outside the first fire-resistant layer (3);

the second protection machanism includes inner frame (5) and filling layer (6), and the middle part of inner frame (5) is provided with three group's draw-in groove, and three group's draw-in groove becomes equilateral triangle and distributes on inner frame (5), and inner core (1) are provided with three group, and every group inner core (1) all is located a set of draw-in groove, and filling layer (6) parcel sets up in the outside of inner core (1) and inner frame (5).

2. The fire-resistant low-voltage wire cable according to claim 1, characterized in that the third protection mechanism comprises a second fire-resistant layer (7), a second insulating layer (8) and an armor layer (9), the second fire-resistant layer (7) is wrapped and arranged outside the filling layer (6), the second insulating layer (8) is wrapped and arranged outside the second fire-resistant layer (7), the armor layer (9) is wrapped and arranged outside the second insulating layer (8), and the outer skin (2) is wrapped and arranged outside the armor layer (9).

3. The fire-resistant low-voltage cable according to claim 2, characterized in that it further comprises reinforcing ribs (10), the reinforcing ribs (10) being provided with at least six groups, the reinforcing ribs (10) of the six groups being uniformly distributed outside the second insulating layer (8).

4. A fire-resistant cable according to claim 1 characterised in that the middle part of the inner frame (5) is provided with an inner hole.

5. A fire-resistant electric cable according to claim 1 characterized in that the filler layer (6) is a fire-retardant filler.

6. A fire resistant cable according to claim 2 characterised in that the first fire resistant layer (3) and the second fire resistant layer (7) are both wound from mica tape.