CN212209003U - A medium voltage fireproof power cable - Google Patents

Abstract

The utility model discloses a medium-voltage fireproof power cable, which comprises a protective sleeve, a flame retardant and fireproof layer is arranged inside the protective sleeve, the flame retardant and fireproof layer is fixedly connected with the protective sleeve, and the inside of the flame retardant and fireproof layer is provided with a flame retardant and fireproof layer. Armored protective layer, the armored protective layer is fixedly connected with the flame retardant and fireproof layer, an inner lining coating layer is arranged inside the armored protective layer, and the inner lining coating layer is fixedly connected with the armored protective layer, so The inner lining coating layer is provided with a plurality of fire-resisting pockets. The utility model is provided with a flame arresting bag. When the cable catches fire, the flame arresting bag is burned, the inert gas inside the flame arresting bag flows out, and the inert gas cuts off the oxygen source of the flame, thereby extinguishing the fire. Through holes, a carbon dioxide fire extinguisher can be used to inject low-temperature carbon dioxide into the cooling through-holes, the cables in the burning part, and the flame-retardant fire-resistant layer are damaged, and the low-temperature carbon dioxide flows out of the cooling through-holes, thereby extinguishing the fire.

Description

A medium voltage fireproof power cable

technical field

The utility model relates to the field of power cables, in particular to a medium-voltage fireproof power cable.

Background technique

The cable is usually a rope-like cable made of several or several groups of conductors, at least two in each group. The conductors of each group are insulated from each other and are often twisted around a center. insulating cover. Most of them are erected in the air or installed underground or underwater for telecommunications or power transmission. Medium-voltage power cables are mainly used for medium-voltage power distribution systems in high-rise buildings, subways, power plants, nuclear power plants, tunnels and other places. And the improvement of environmental awareness has put forward higher requirements for the safety and environmental protection of cables under fire conditions.

With the continuous development of social economy, in high-rise buildings, post and telecommunications departments, railways, ships and other places where cables are densely laid, the loss caused by fire caused by cables is becoming more and more serious. At present, medium-voltage power cables usually use protective sleeves made of flame retardant materials. , so as to achieve the function of fire prevention, and then the cable will continue to burn after it catches fire. The flame retardant material can only slow down the expansion of the fire, but cannot effectively extinguish the fire, resulting in poor fire performance of the cable.

Therefore, it is necessary to invent a medium voltage fireproof power cable to solve the above problems.

Utility model content

The purpose of this utility model is to provide a medium-voltage fireproof power cable. By being provided with a fire-resisting bag, when the cable catches fire, the fire-resisting bag is burned out, the inert gas inside the fire-resisting bag flows out, and the inert gas cuts off the oxygen source of the flame, thereby To extinguish the fire, by opening a cooling through hole inside the armored protective layer, a carbon dioxide fire extinguisher can be used to inject low-temperature carbon dioxide into the cooling through hole. In the intact cable part, the cooling through hole is blocked by the fireproof layer, and the cable in the fire part is flame retardant. The fireproof layer is damaged, and low-temperature carbon dioxide flows out from the cooling through hole, so as to extinguish the fire, so as to solve the above-mentioned deficiencies in the technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: a medium-voltage fireproof power cable, comprising a protective cover, the protective cover is provided with a flame-retardant fireproof layer, and the flame-retardant fireproof layer is fixedly connected with the protective cover, so An armored protective layer is arranged inside the flame retardant and fireproof layer, and the armored protective layer is fixedly connected with the flame retardant and fireproof layer. The armored protective layer is fixedly connected, the inner lining coating layer is provided with a plurality of fire-retardant pockets, the fire-retardant pocket is fixedly connected to the inner lining coating layer, and the inner lining coating layer is provided with a conductor inner core An insulating layer is provided outside the conductor inner core, the insulating layer is fixedly connected with the conductor inner core, and a filling layer is arranged between the inner lining coating layer and the insulating layer.

Preferably, the fire-resisting bags are made of rubber material, the number of the fire-resisting bags is set to be multiple, and the plurality of the fire-resisting bags are distributed in an annular array, and the interior of the fire-resisting bags is filled with inert gas.

Preferably, the armored protective layer is made of an aluminum alloy material, a plurality of cooling through holes are opened inside the armored protective layer, and the plurality of cooling through holes are distributed in an annular array.

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

Preferably, the inner lining and coating layer includes an isolation sleeve, and a mica tape is wound on the outside of the isolation sleeve.

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

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

In the above-mentioned technical scheme, the technical effect and advantage that the utility model provides:

By providing a fire-stop bag, when the cable catches fire, the fire-stop bag is burned, the inert gas inside the fire-stop bag flows out, and the inert gas cuts off the oxygen source of the flame, thereby extinguishing the fire. By opening a cooling through hole inside the armored protective layer, A carbon dioxide fire extinguisher can be used to inject low-temperature carbon dioxide into the cooling through hole. In the intact cable part, the cooling through-hole is blocked by the fireproof layer, and the fire-resistant part of the cable is damaged, and the low-temperature carbon dioxide flows out from the cooling through hole, thereby extinguishing the fire. fire.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only in the present invention For some of the described embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

Fig. 1 is the overall structure schematic diagram of the present utility model;

Fig. 2 is the sectional view of the utility model;

FIG. 3 is an enlarged view of the structure of part A of FIG. 2 of the utility model;

Fig. 4 is an enlarged view of the structure of part B of Fig. 1 of the utility model.

Description of reference numbers:

1 protective cover, 2 flame retardant fireproof layer, 3 armored protective layer, 4 inner lining cladding layer, 41 isolation sleeve, 42 mica tape, 5 fireproof bag, 6 conductor inner core, 7 insulating layer, 8 filling layer, 9 Cooling vias.

Detailed ways

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

The utility model provides a medium-voltage fireproof power cable as shown in Figures 1-4, comprising a protective cover 1, the protective cover 1 is provided with a flame retardant and fireproof layer 2 inside, and the flame retardant and fireproof layer 2 is connected with the protective cover. 1 Fixed connection, the interior of the flame retardant and fireproof layer 2 is provided with an armored protective layer 3, the armored protective layer 3 is fixedly connected to the flame retardant and fireproof layer 2, and the interior of the armored protective layer 3 is provided with an inner lining covering Layer 4, the inner lining coating layer 4 is fixedly connected with the armor protection layer 3, and the inner lining coating layer 4 is provided with a plurality of fire-stopping pockets 5, and the fire-stopping pockets 5 are connected with the inner lining coating layer. 4. Fixed connection, the inner lining cladding layer 4 is provided with a conductor inner core 6, the outer conductor inner core 6 is provided with an insulating layer 7, and the insulating layer 7 is fixedly connected with the conductor inner core 6, and the inner lining A filling layer 8 is provided between the cladding layer 4 and the insulating layer 7 .

Further, in the above technical solution, the fire-resisting bag 5 is made of rubber material, the number of the fire-resisting bag 5 is set to a plurality, and the plurality of the fire-resisting bag 5 are distributed in an annular array. The inside of the bag 5 is filled with inert gas, which is conducive to isolating oxygen in the air, so as to achieve the purpose of extinguishing the flame.

Further, in the above technical solution, the armored protective layer 3 is made of an aluminum alloy material, and a plurality of cooling through holes 9 are opened inside the armored protective layer 3, and the plurality of cooling through holes 9 are annular. Array distribution reduces the weight of the cable without affecting the strength of the armored protective layer 3 .

Further, in the above technical solution, the protective cover 1 is made of ceramic silicon rubber material, and the flame retardant and fireproof layer 2 is made of low-smoke halogen-free flame retardant material, which is convenient to reduce the emission of harmful gases during combustion. .

Further, in the above technical solution, the inner lining coating layer 4 includes an isolation sleeve 41 , and a mica tape 42 is wound around the outside of 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 core 6 is set to be multiple.

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

The specific embodiment is as follows: when the utility model is used, the protective sleeve 1 is made of a ceramicized silicone rubber material, which can effectively protect the power cable and avoid the power cable being damaged by external objects, and at the same time, the ceramicized silicone rubber has good fire resistance. The flame retardant performance can improve the fireproof effect of the cable. By setting the flame retardant fireproof layer 2, the fireproof effect of the cable can be further improved. By setting the armored protective layer 3, the inner conductor core 6 can be protected, and the conductor core 6 can be prevented from being compressed Damaged, by being provided with a flame arrester bag 5, when the cable catches fire, the flame arrester bag 5 is burnt, the inert gas inside the flame arrester bag 5 flows out, and the inert gas cuts off the oxygen source of the flame, thereby extinguishing the fire, through the armored protective layer 3 There are cooling through holes 9 inside. When the position of some cables on fire is narrow and it is difficult to enter the fire extinguishing, a carbon dioxide fire extinguisher can be used to inject low-temperature carbon dioxide into the cooling through holes 9. In the intact cable part, the cooling through holes 9 are blocked by the fireproof layer, and the cooling through holes 9 are blocked by the fireproof layer. The flame retardant and fireproof layer 2 of the cable on fire part is damaged, and the low-temperature carbon dioxide flows out from the cooling through hole 9, thereby extinguishing the fire. This embodiment specifically solves the problem that the cable in the prior art will continue to burn after it catches fire, and the flame retardant material can only be used. Slowing down the speed of fire expansion cannot effectively extinguish the fire, resulting in the problem of poor fire resistance of the cable.

This practical working principle:

Referring to the accompanying drawings 1-4 of the description, the inner conductor core 6 can be protected by setting the armored protective layer 3 to prevent the conductor inner core 6 from being damaged by pressure. By providing the flame arresting bag 5, when the cable catches fire, the flame arresting bag 5 After being burned, the inert gas inside the flame arrester 5 flows out, and the inert gas cuts off the oxygen source of the flame, thereby extinguishing the fire. By opening a cooling through hole 9 inside the armored protective layer 3, when the part of the cable on fire is narrow, it is difficult to enter the fire extinguishing. At this time, a carbon dioxide fire extinguisher can be used to inject low-temperature carbon dioxide into the cooling through hole 9. In the intact cable part, the cooling through hole 9 is blocked by the fireproof layer, and the fire-resistant part of the cable, the flame-retardant fireproof layer 2 is damaged, and the low-temperature carbon dioxide is removed from the cooling through hole. The hole 9 flows out, thereby extinguishing the fire.

Certain exemplary embodiments of the present invention have been described above by way of illustration only, and it goes without saying that for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, various different Modifications are made to the described embodiments. Accordingly, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims (7)

1. A medium-voltage fireproof power cable, comprising a protective cover (1), characterized in that: the protective cover (1) is provided with a flame retardant and fireproof layer (2) inside, and the flame retardant and fireproof layer (2) is connected with the protection The sleeve (1) is fixedly connected, an armored protection layer (3) is provided inside the flame-retardant and fire-resistant layer (2), and the armored protection layer (3) is fixedly connected with the flame-retardant and fire-resistant layer (2). An inner lining covering layer (4) is arranged inside the protective protective layer (3), the inner lining covering layer (4) is fixedly connected with the armoring protective layer (3), and the inner lining covering layer (4) is A plurality of fire-stopping pockets (5) are provided, and the fire-stopping pockets (5) are fixedly connected with the inner lining coating layer (4), and the inner lining coating layer (4) is provided with a conductor inner core (6) , an insulating layer (7) is provided outside the conductor inner core (6), the insulating layer (7) is fixedly connected to the conductor inner core (6), and the lining coating layer (4) is connected to the insulating layer (7). ) is provided with a filling layer (8). 2. A medium-voltage fireproof power cable according to claim 1, characterized in that: the fire-resisting bag (5) is made of rubber material, and the number of the fire-resisting bag (5) is set to a plurality of Each of the flame arrester bags (5) is distributed in an annular array, and the interior of the flame arrester bags (5) is filled with an inert gas. 3. A medium-voltage fireproof power cable according to claim 1, characterized in that: the armored protective layer (3) is made of an aluminum alloy material, and the armored protective layer (3) is provided with a plurality of interiors. There are several cooling through holes (9), and a plurality of the cooling through holes (9) are distributed in an annular array. 4. A medium voltage fireproof power cable according to claim 1, characterized in that: the protective cover (1) is made of ceramic silicon rubber material, and the flame retardant and fireproof layer (2) is made of low-smoke, non-flammable Made of halogen flame retardant materials. 5. A medium voltage fireproof power cable according to claim 1, characterized in that: the inner lining and coating layer (4) comprises an isolation sleeve (41), and a mica tape is wound on the outside of the isolation sleeve (41). (42). 6. A medium voltage fireproof power cable according to claim 1, characterized in that: the inner conductor core (6) is formed by twisting a plurality of copper wires, and the number of the inner conductor core (6) is set to multiple. 7 . The medium voltage fireproof power cable according to claim 1 , wherein the insulating layer ( 7 ) is made of polyethylene material, and the filling layer ( 8 ) is made of glass fiber filament material. 8 .

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