CN212209003U

CN212209003U - Medium-voltage fireproof power cable

Info

Publication number: CN212209003U
Application number: CN202020994798.7U
Authority: CN
Inventors: 黄国亮
Original assignee: Guangdong Nanfan Electrical Appliance Co ltd
Current assignee: Guangdong Nanfan Electrical Appliance Co ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-12-22
Anticipated expiration: 2030-06-03

Abstract

The utility model discloses a middling pressure fire prevention power cable, including the protective sheath, the inside fire-retardant flame retardant coating that is equipped with of protective sheath, fire-retardant flame retardant coating and protective sheath fixed connection, the inside armor protective layer that is equipped with of fire-retardant flame retardant coating, armor protective layer and fire-retardant flame retardant coating fixed connection, the inside lining covering that is equipped with of armor protective layer, inside lining covering and armor protective layer fixed connection, inside a plurality of back-fire relief bags that are equipped with of lining covering. The utility model discloses a be equipped with the back-fire relief bag, back-fire relief bag is burnt out when the cable catches fire, and the inside inert gas of back-fire relief bag flows, and inert gas cuts off the oxygen source of flame to put out the intensity of a fire, through set up the cooling through-hole inside the armor protective layer, can use the carbon dioxide fire extinguisher to pour into microthermal carbon dioxide into in the cooling through-hole, the cable of the part of catching fire, fire-retardant flame retardant coating damages, and microthermal carbon dioxide flows from the cooling through-hole, thereby puts out the intensity of a fire.

Description

Medium-voltage fireproof power cable

Technical Field

The utility model relates to a power cable field, concretely relates to middling pressure fire prevention power cable.

Background

A cable is typically a rope-like cable made up of several or groups of at least two twisted conductors, each group being insulated from each other and often twisted around a center, the entire outer surface being covered with a highly insulating covering. The medium-voltage power cable is mainly used for medium-voltage power distribution systems in high-rise buildings, subways, power plants, nuclear power stations, tunnels and other places, and along with the improvement of safety consciousness and environmental awareness of people, higher requirements are put forward on the safety and environmental awareness of the cable under the fire condition.

Along with the continuous development of social economy, in places with densely-laid cables such as high-rise buildings, post and telecommunications departments, railways, ships and the like, the loss caused by fire disasters of the cables is increasingly serious, the conventional medium-voltage power cables usually use protective sleeves made of flame-retardant materials so as to realize the fireproof function, then the cables can continuously burn after being ignited, the flame-retardant materials only can slow down the expansion speed of the fire, the fire cannot be effectively extinguished, and the fireproof performance of the cables is poor.

Therefore, there is a need for a medium voltage fireproof power cable to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a middling pressure fire prevention power cable, through being equipped with the back-fire relief bag, back-fire relief bag is burnt out after the cable catches fire, the inside inert gas of back-fire relief bag flows, inert gas cuts off the oxygen source of flame, thereby put out the intensity of a fire, through seting up the cooling through-hole inside the armor protective layer, can use the carbon dioxide fire extinguisher to inject microthermal carbon dioxide into the cooling through-hole, intact cable part, the cooling through-hole is blockked up by the flame retardant coating, and the cable of the part of catching fire, fire-retardant flame retardant coating damages, microthermal carbon dioxide flows from the cooling through-hole, thereby put out the intensity of a fire.

In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a middling pressure fire prevention power cable, includes the protective sheath, the inside fire-retardant flame retardant coating that is equipped with of protective sheath, fire-retardant flame retardant coating and protective sheath fixed connection, the inside armor protective layer that is equipped with of fire-retardant flame retardant coating, armor protective layer and fire-retardant flame retardant coating fixed connection, the inside lining covering that is equipped with of armor protective layer, inside lining covering and armor protective layer fixed connection, the inside a plurality of back-fire relief bags that are equipped with of lining covering, back-fire relief bag and inside lining covering fixed connection, the inside conductor inner core that is equipped with of lining covering, conductor inner core outside is equipped with the insulating layer, insulating layer and conductor inner core fixed connection, be equipped with.

Preferably, the fire retardant bags are made of rubber materials, the number of the fire retardant bags is set to be multiple, the fire retardant bags are distributed in an annular array, and inert gas is filled in the fire retardant bags.

Preferably, the armor protective layer is made of aluminum alloy materials, a plurality of cooling through holes are formed in the armor protective layer, and the cooling through holes are distributed in an annular array.

Preferably, the protective sleeve is made of a ceramic silicon rubber material, and the flame-retardant fireproof layer is made of a low-smoke halogen-free flame-retardant material.

Preferably, the lining covering layer comprises an isolation sleeve, and a mica tape is wound outside the isolation sleeve.

Preferably, the conductor inner core is formed by twisting a plurality of copper wires, and the number of the conductor inner cores is set to be a plurality.

Preferably, the insulating layer is made of polyethylene material, and the filling layer is made of glass fiber silk material.

In the technical scheme, the utility model provides a technological effect and advantage:

through being equipped with the back-fire relief bag, back-fire relief bag is burnt out when the cable catches fire, and the inside inert gas of back-fire relief bag flows, and inert gas cuts off the oxygen source of flame to put out the intensity of a fire, through set up the cooling through-hole inside the armor protective layer, can use the carbon dioxide fire extinguisher to pour into microthermal carbon dioxide into the cooling through-hole, intact cable part, the cooling through-hole is blockked up by the flame retardant coating, and the cable of the part that catches fire, fire-retardant flame retardant coating damages, and microthermal carbon dioxide flows from the cooling through-hole, thereby put.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of the portion A of FIG. 2 according to the present invention;

fig. 4 is an enlarged view of the structure of the part B of fig. 1 according to the present invention.

Description of reference numerals:

1 protective sheath, 2 fire-retardant flame retardant coating, 3 armor protective layers, 4 inside lining covers, 41 insulation cover, 42 mica tape, 5 back-fire relief bags, 6 conductor inner cores, 7 insulating layers, 8 filling layers, 9 cooling through holes.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

The utility model provides a medium voltage fireproof power cable as shown in figures 1-4, which comprises a protective sleeve 1, the interior of the protective sleeve 1 is provided with a flame-retardant fireproof layer 2, the flame-retardant fireproof layer 2 is fixedly connected with the protective sleeve 1, an armor protection layer 3 is arranged inside the flame-retardant fireproof layer 2, the armor protection layer 3 is fixedly connected with the flame-retardant fireproof layer 2, a lining covering layer 4 is arranged inside the armor protection layer 3, the lining covering layer 4 is fixedly connected with the armor protection layer 3, a plurality of fire retardant bags 5 are arranged inside the inner lining covering layer 4, the fire retardant bags 5 are fixedly connected with the inner lining covering layer 4, a conductor inner core 6 is arranged inside the lining coating layer 4, an insulating layer 7 is arranged outside the conductor inner core 6, the insulating layer 7 is fixedly connected with the conductor inner core 6, and a filling layer 8 is arranged between the lining coating layer 4 and the insulating layer 7.

Further, in above-mentioned technical scheme, back-fire relief bag 5 is made by rubber materials, back-fire relief bag 5 quantity sets up to a plurality ofly, and is a plurality of back-fire relief bag 5 is the annular array and distributes, back-fire relief bag 5 is inside to be filled with inert gas, is favorable to the oxygen in the isolated air to reach the mesh of extinguishing flame.

Further, in the above technical scheme, the armor protection layer 3 is made of an aluminum alloy material, a plurality of cooling through holes 9 are formed in the armor protection layer 3, and the plurality of cooling through holes 9 are distributed in an annular array, so that the weight of the cable is reduced on the premise that the strength of the armor protection layer 3 is not affected.

Further, in the above technical scheme, the protective sheath 1 is made of a ceramic silicon rubber material, and the flame-retardant fireproof layer 2 is made of a low-smoke halogen-free flame-retardant material, so that the emission of harmful gases during combustion is reduced.

Further, in the above technical solution, the lining covering layer 4 includes an isolation sleeve 41, and a mica tape 42 is wound outside the isolation sleeve 41.

Further, in the above technical solution, the conductor inner core 6 is formed by twisting a plurality of copper wires, and the number of the conductor inner cores 6 is set to be a plurality.

Further, in the above technical solution, the insulating layer 7 is made of polyethylene material, and the filling layer 8 is made of glass fiber filament material.

The implementation mode is specifically as follows: when the utility model is used, the protective sleeve 1 is made of ceramic silicon rubber materials, the power cable can be effectively protected, the power cable is prevented from being damaged by external articles, meanwhile, the ceramic silicon rubber has good fire-resistant and flame-retardant performance, the fireproof effect of the cable can be improved, the fireproof effect of the cable is further improved by arranging the flame-retardant fireproof layer 2, the inner conductor inner core 6 can be protected by arranging the armor protective layer 3, the conductor inner core 6 is prevented from being damaged by pressure, the flame-retardant bag 5 is arranged, the flame-retardant bag 5 is burnt after the cable is ignited, the inert gas in the flame-retardant bag 5 flows out, the inert gas cuts off the oxygen source of the flame, thereby extinguishing the fire, the cooling through hole 9 is arranged in the armor protective layer 3, when the position of part of the cable which is on fire is narrow and is difficult to enter into for extinguishing fire, the carbon dioxide extinguisher can be used for injecting low, intact cable part, cooling through-hole 9 is blockked up by the flame retardant coating, and the cable of the part of catching fire, fire-retardant flame retardant coating 2 damages, and microthermal carbon dioxide flows out from cooling through-hole 9 to put out the intensity of a fire, this embodiment has specifically solved among the prior art cable and still can constantly burn after catching fire, and fire-retardant material can only slow down the speed that the intensity of a fire enlarges, can not effectually extinguish the intensity of a fire, leads to the poor problem of fire behavior of cable.

This practical theory of operation:

referring to the attached drawings 1-4 of the specification, through setting up the armor protective layer 3, can protect inside conductor inner core 6, avoid conductor inner core 6 to be pressed and damage, through being equipped with back-fire relief bag 5, back-fire relief bag 5 is burnt out after the cable catches fire, the inside inert gas of back-fire relief bag 5 flows out, inert gas cuts off the oxygen source of flame, thereby put out the intensity of a fire, through offering cooling through-hole 9 inside armor protective layer 3, when the partial cable position of catching fire is narrow, be difficult to get into when putting out a fire, can use the carbon dioxide fire extinguisher to pour into microthermal carbon dioxide into cooling through-hole 9, intact cable part, cooling through-hole 9 is blockked up by the flame retardant coating, and the partial cable that catches fire, fire-retardant coating 2 damages, microthermal carbon dioxide flows out from cooling through-hole.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. A medium voltage fireproof power cable, comprising a protective sheath (1), characterized in that: the flame-retardant fireproof layer (2) is arranged in the protective sleeve (1), the flame-retardant fireproof layer (2) is fixedly connected with the protective sleeve (1), an armor protective layer (3) is arranged inside the flame-retardant fireproof layer (2), the armor protective layer (3) is fixedly connected with the flame-retardant fireproof layer (2), a lining covering layer (4) is arranged inside the armor protection layer (3), the lining covering layer (4) is fixedly connected with the armor protection layer (3), a plurality of fire retardant bags (5) are arranged inside the lining covering layer (4), the fire retardant bags (5) are fixedly connected with the lining covering layer (4), a conductor inner core (6) is arranged inside the lining cladding layer (4), an insulating layer (7) is arranged outside the conductor inner core (6), insulating layer (7) and conductor inner core (6) fixed connection, be equipped with filling layer (8) between inside lining cladding (4) and insulating layer (7).

2. A medium voltage fire power cable according to claim 1, characterized in that: the fire retardant bags (5) are made of rubber materials, the number of the fire retardant bags (5) is set to be multiple, the fire retardant bags (5) are distributed in an annular array, and inert gas is filled in the fire retardant bags (5).

3. A medium voltage fire power cable according to claim 1, characterized in that: the armored protection layer (3) is made of aluminum alloy materials, a plurality of cooling through holes (9) are formed in the armored protection layer (3), and the cooling through holes (9) are distributed in an annular array mode.

4. A medium voltage fire power cable according to claim 1, characterized in that: the protective sleeve (1) is made of a ceramic silicon rubber material, and the flame-retardant fireproof layer (2) is made of a low-smoke halogen-free flame-retardant material.

5. A medium voltage fire power cable according to claim 1, characterized in that: the lining coating layer (4) comprises an isolation sleeve (41), and a mica tape (42) is wound outside the isolation sleeve (41).

6. A medium voltage fire power cable according to claim 1, characterized in that: the conductor inner core (6) is formed by twisting a plurality of copper wires, and the number of the conductor inner cores (6) is set to be a plurality.

7. A medium voltage fire power cable according to claim 1, characterized in that: the insulating layer (7) is made of polyethylene material, and the filling layer (8) is made of glass fiber silk material.