High-flame-retardant fireproof power cable

Abstract

The utility model discloses a high-flame-retardant fireproof power cable, and relates to the technical field of fireproof cables. Comprising an isolation support which is of a strip-shaped structure and is provided with a plurality of side faces; the wire is arranged on the side surface of the isolation bracket, and the wire is arranged along the length direction of the isolation bracket; the heat insulation layer is wound on the outer side of the wire and the outer side of the isolation support, and a plurality of vacuum cavities are formed in the heat insulation layer; the shock absorption layer is arranged on the outer side of the heat insulation layer. According to the utility model, the heat insulation layer is arranged, and the vacuum cavity is arranged in the heat insulation layer, so that heat preservation and heat insulation can be carried out on the interior of the cable, the internal temperature of the cable can be ensured when the cable is burnt by flame, and flame retardance, fire prevention and moisture prevention can be effectively realized.

Description

Technical Field

[0001] The utility model relates to the technical field of fireproof cables, and more specifically to a highly flame-retardant and fireproof power cable. Background Art

[0002] Currently, the mature products on the market that meet the flame retardant requirements of BS6387 standards are copper core copper sheathed magnesium oxide insulated BTT cable products. Since magnesium oxide powder insulation is easy to absorb moisture in a humid environment, the cable insulation will decrease.

[0003] Therefore, how to provide a highly flame-retardant and fire-proof power cable that can be used in a humid environment and can effectively retard flames is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0004] In view of this, the utility model provides a highly flame-retardant and fireproof power cable, aiming to solve the problems in the above-mentioned background technology and achieve the ability to be used in a humid environment and to be effectively flame-retardant.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A highly flame retardant and fireproof power cable, comprising:

[0007] An isolation bracket, wherein the isolation bracket is a strip-shaped structure and has a plurality of sides;

[0008] A conducting wire, wherein the conducting wire is arranged on a side surface of the isolating bracket and is arranged along a length direction of the isolating bracket;

[0009] A heat insulation layer, the heat insulation layer is wrapped around the outer sides of the conductor and the isolation bracket, the heat insulation layer has a vacuum cavity arranged inside the heat insulation layer, and the vacuum cavity is arranged in plurality;

[0010] A shock absorbing layer is arranged on the outer side of the heat insulating layer.

[0011] Furthermore, the isolation bracket includes an inner bracket and a filling layer, the side of the inner bracket is set as an arc-shaped section, the wire is set in a recess of the arc-shaped section, a water storage cavity is axially arranged in the middle of the bracket, and the filling layer is arranged on both sides of the wire on the bracket.

[0012] Furthermore, a first insulating layer is disposed inside the vacuum chamber, and the first insulating layer is wrapped around the outside of the isolation bracket and the wire.

[0013] Furthermore, a tensile layer is provided on the conductor, and the tensile layer is wrapped around the surface of the conductor.

[0014] Furthermore, a second insulating layer is provided on the outer surface of the tensile layer.

[0015] Furthermore, a peeling layer is provided on the outer side of the shock-absorbing layer.

[0016] Furthermore, the vacuum chamber includes an inner chamber and an outer chamber, both of which are annular vacuum chambers, the inner chamber is arranged on the outside of the wire and the isolation bracket, the outer chamber is arranged on the outside of the inner chamber, and support columns are arranged inside the inner chamber and the outer chamber.

[0017] Furthermore, a plurality of the support columns are provided, and the plurality of the support columns are arranged in the inner cavity and the outer cavity in a circular array, and the support columns of the inner cavity and the support columns of the outer cavity are arranged alternately.

[0018] It can be seen from the above technical solutions that, compared with the prior art, the utility model discloses a highly flame retardant and fireproof power cable. By providing a heat insulation layer and a vacuum cavity in the heat insulation layer, the interior of the cable can be insulated, thereby ensuring the internal temperature of the cable when the cable is burned by flames, thereby achieving flame retardancy, fire resistance and moisture resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 A schematic cross-sectional view of a highly flame-retardant and fire-proof power cable provided by the utility model;

[0021] Among them: 1 is an isolation bracket; 11 is an inner bracket; 12 is a filling layer; 10 is a water storage cavity; 2 is a conductor; 3 is a heat insulation layer; 4 is a vacuum cavity; 41 is an inner cavity; 42 is an outer cavity; 40 is a support column; 5 is a shock absorbing layer; 6 is a first insulating layer; 7 is a tensile layer; 8 is a second insulating layer; 9 is a peeling layer; DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 The utility model embodiment discloses a highly flame retardant and fireproof power cable, comprising:

[0024] The isolation bracket 1 is a strip-shaped structure having multiple sides. In the present embodiment, the isolation bracket 1 is used to support and divide multiple conductors 2 so that there is a certain distance between the multiple conductors 2, which can effectively prevent short circuits between multiple lines and prevent a single conductor 2 from being ignited by other conductors 2.

[0025] Wire 2, wire 2 is arranged on the side of isolation bracket 1, and wire 2 is arranged along the length direction of isolation bracket 1; in this embodiment, the number of wires 2 is determined according to usage, and according to the number of wires 2, the number of edges of isolation bracket 1 can be determined, and then the shape and structure of isolation bracket 1 can be determined.

[0026] The thermal insulation layer 3 is wrapped around the outside of the conductor 2 and the isolation bracket 1, and the thermal insulation layer 3 is provided with a vacuum chamber 4, and the vacuum chamber 4 is provided with multiple ones; in this embodiment, the thermal insulation layer 3 is used to isolate the temperature inside and outside the thermal insulation layer 3, thereby effectively preventing the conductor 2 inside the thermal insulation layer 3 from being burned by external flames.

[0027] The shock absorbing layer 5 is arranged on the outside of the heat insulating layer 3; in the present embodiment, the shock absorbing layer 5 is used to reduce the shock of the cable during transportation, and at the same time, it can also prevent the cable from damaging the organisms and objects on the ground when it falls from a high altitude.

[0028] The isolation bracket 1 includes an inner bracket 11 and a filling layer 12. The side of the inner bracket 11 is set to an arc-shaped cross-section, the wire 2 is set in the recess of the arc-shaped cross-section, and a water storage chamber 10 is axially arranged in the middle of the bracket. The filling layer 12 is arranged on both sides of the wire 2 on the bracket; in this embodiment, the filling layer 12 is a fire-extinguishing material, and sand or other non-flammable powder can be filled in the filling layer 12. When in use, if the external flame burns the isolation layer, the powder will block the air and modify and bury the flame, thereby effectively preventing the flame from burning the internal bracket and the wire 2 on the bracket.

[0029] A first insulating layer 6 is provided inside the vacuum chamber 4, and the first insulating layer 6 is wrapped around the outside of the isolation bracket 1 and the conductor 2. A tensile layer 7 is provided on the conductor 2, and the tensile layer 7 is wrapped around the surface of the conductor 2. A second insulating layer 8 is provided on the outer surface of the tensile layer 7. A peeling layer 9 is provided on the outer edge of the shock-absorbing layer 5. In this embodiment, the peeling layer 9 provided on the outer side of the shock-absorbing layer 5 can be peeled off and fall off naturally at the outermost part of the cable after the cable is exposed to external flames or the internal temperature rises. During manufacturing, the peeling layer 9 and the shock-absorbing layer 5 can be set to two different colors for distinction, so that the cable fire fault or the external damage position can be quickly found to facilitate maintenance personnel to carry out maintenance.

[0030] The vacuum chamber 4 includes an inner chamber 41 and an outer chamber 42, both of which are annular vacuum chambers 4. The inner chamber 41 is arranged outside the conductor 2 and the isolation bracket 1, and the outer chamber 42 is arranged outside the inner chamber 41. Support columns 40 are arranged inside the inner chamber 41 and the outer chamber 42. There are multiple support columns 40, and multiple support columns 40 are arranged in an annular array in the inner chamber 41 and the outer chamber 42. The support columns 40 of the inner chamber 41 and the support columns 40 of the outer chamber 42 are staggered. In this embodiment, the middle of the inner chamber 41 and the outer chamber 42 are both vacuum structures, which can isolate heat from passing through the vacuum chamber 4. At the same time, by respectively arranging support columns 40 in the inner chamber 41 and the outer chamber 42, the vacuum chamber 4 can be effectively supported. At the same time, by staggering the pillars of the inner chamber 41 and the outer chamber 42, it is possible to effectively prevent heat from being conducted in the self-support, and the cable can be further insulated.

[0031] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A highly flame retardant and fireproof power cable, characterized in that: include: An isolation bracket, wherein the isolation bracket is a strip-shaped structure and has a plurality of sides; A conducting wire, wherein the conducting wire is arranged on a side surface of the isolating bracket and is arranged along a length direction of the isolating bracket; A heat insulation layer, the heat insulation layer is wrapped around the outer sides of the conductor and the isolation bracket, the heat insulation layer has a vacuum cavity arranged inside the heat insulation layer, and the vacuum cavity is arranged in plurality; A shock absorbing layer is arranged on the outer side of the heat insulating layer.

2. A highly flame retardant and fireproof power cable according to claim 1, characterized in that: The isolation bracket includes an inner bracket and a filling layer. The side of the inner bracket is set as an arc section. The wire is set in the recess of the arc section. A water storage cavity is axially arranged in the middle of the bracket. The filling layer is set on both sides of the wire on the bracket.

3. A highly flame retardant and fireproof power cable according to claim 1, characterized in that: A first insulating layer is arranged inside the vacuum chamber, and the first insulating layer is wrapped around the outside of the isolation bracket and the wire.

4. A highly flame retardant and fireproof power cable according to claim 1, characterized in that: The conductor is provided with a tensile layer, and the tensile layer is wrapped around the surface of the conductor.

5. A highly flame retardant and fireproof power cable according to claim 4, characterized in that: A second insulating layer is arranged on the outer surface of the tensile layer.

6. A highly flame retardant and fireproof power cable according to claim 1, characterized in that: The outer side surface of the shock absorbing layer is provided with a peeling layer.

7. A highly flame retardant and fireproof power cable according to claim 1, characterized in that: The vacuum chamber includes an inner chamber and an outer chamber, both of which are annular vacuum chambers. The inner chamber is arranged on the outside of the wire and the isolation bracket, and the outer chamber is arranged on the outside of the inner chamber. Support columns are arranged inside the inner chamber and the outer chamber.

8. A highly flame retardant and fireproof power cable according to claim 7, characterized in that: A plurality of support columns are provided, and the plurality of support columns are arranged in the inner cavity and the outer cavity in a ring array, and the support columns of the inner cavity and the support columns of the outer cavity are arranged alternately.

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