CN211319789U

CN211319789U - Novel fireproof cable

Info

Publication number: CN211319789U
Application number: CN201921684394.1U
Authority: CN
Inventors: 侯洁浩; 林洁斌
Original assignee: Guangdong Guangshen Cable Co ltd
Current assignee: Guangdong Guangshen Cable Co ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-08-21
Anticipated expiration: 2029-10-08

Abstract

The utility model discloses a novel fireproof cable, including outer fire protection layer, first cable core and second cable core, first cable core and cable core setting are in outer fire protection layer; the inside of outer fire protection layer is equipped with and holds the chamber, holds the intracavity and is equipped with the inflation liquid and is located the connection core on the liquid level of inflation liquid, connects first cable core of core intercommunication and second cable core. The inner cable core is protected by the outer fireproof protection layer, and the expansion liquid is heated to expand and supports the connecting core so as to realize automatic circuit breaking and power failure in a mode that the first cable core and the second cable core are in circuit breaking, so that the electric power leakage caused by the fact that electric power facilities are damaged by fire is prevented from causing danger.

Description

Novel fireproof cable

Technical Field

The utility model relates to a cable field, especially a novel fireproof cable.

Background

Cables are commonly used for telecommunication or power transmission and may be classified into power cables, communication cables, and control cables according to their uses. With the growing demand, a large number of cables are used in densely populated areas. In densely populated areas, fires are likely to occur. Once a fire occurs, the cable is greatly damaged, and although the cable wrapped with the fireproof layer exists at present, once the fireproof layer cannot withstand high temperature, the electrified cable brings great harm to human life.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a novel fireproof cable, have the fire protection and can realize receiving high temperature automatic cutout.

The utility model provides a technical scheme that its problem adopted is:

a novel fireproof cable comprises an outer fireproof protection layer, a first cable core and a second cable core, wherein the first cable core and the second cable core are arranged in the outer fireproof protection layer; an accommodating cavity is formed in the outer fireproof protection layer, expansion liquid and a connecting core positioned on the liquid level of the expansion liquid are arranged in the accommodating cavity, and the connecting core is communicated with the first cable core and the second cable core; the expansion liquid is heated to expand and lift the connecting core, so that the first cable core and the second cable core are disconnected.

Further, the connecting core comprises a bearing part and a core body arranged in the bearing part; the bearing part is connected with the top wall of the accommodating cavity through a spring.

Further, the area of the lower surface of the bearing part, which is in contact with the liquid surface of the inflation liquid, is equal to the area of the liquid surface of the inflation liquid.

Furthermore, the side of the bottom of the bearing part is provided with a sealant.

Further, the expansion fluid is mercury.

Furthermore, an anti-aging layer is wrapped outside the outer fireproof protective layer.

In particular, the outer fire protection layer is made of polyimide.

Specifically, the anti-aging layer is made of polybenzimidazole.

Above-mentioned novel fireproof cable has following beneficial effect at least: the outer fireproof protection layer is used for resisting external flame and protecting the internal cable core; in addition, automatic circuit breaking and power breaking are realized in a mode that the expansion liquid expands when heated and supports the connecting core to break the first cable core and the second cable core, so that the electric power leakage is prevented from causing danger due to the fact that electric power facilities are damaged by fire.

Drawings

The invention is further described with reference to the following figures and examples.

Fig. 1 is a structural diagram of a novel fireproof cable according to an embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, an embodiment of the present invention provides a novel fireproof cable, including an outer fireproof protection layer 100, a first cable core 110 and a second cable core 120, where the first cable core 110 and the second cable core 120 are disposed in the outer fireproof protection layer 100; an accommodating cavity 600 is formed in the outer fireproof protection layer 100, expansion liquid 300 and a connecting core 200 positioned on the liquid level of the expansion liquid 300 are arranged in the accommodating cavity 600, and the connecting core 200 is communicated with the first cable core 110 and the second cable core 120; the expansion liquid 300 thermally expands and lifts the connection core 200 to disconnect the first cable core 110 and the second cable core 120.

In this embodiment, the outer fireproof protective layer 100 blocks external flames to protect the internal cable core; in addition, the expansion liquid 300 is heated and expanded to gradually lift the connecting core 200, so that the first cable core 110 and the second cable core 120 are in circuit-breaking, and the function of automatically breaking and cutting off the power when the novel fireproof cable is threatened by a fire is realized, so that the electric power leakage caused by the fact that the electric power facility is damaged by the fire is prevented from causing danger. When the novel fireproof cable is not burnt by flame any more, the temperature of the expansion liquid 300 is reduced, the volume of the expansion liquid 300 is reduced, and the connecting core 200 is gradually reduced to the position communicated with the first cable core 110 and the second cable core 120.

In another embodiment, the connecting core 200 includes a carrier portion 210 and a core body 220 disposed in the carrier portion 210; the carrier 210 is connected to the top wall of the receiving chamber 600 by the spring 400. The spring 400 serves to fix the position of the carrier 210. When the novel fireproof cable is in a low-temperature environment, the volume of the expansion liquid 300 is reduced; due to the gravity of the connection core 200, the spring 400 exerts a tensile force on the connection core 200, so that the core 220 is maintained at a position where the first cable core 110 and the second cable core 120 are connected.

It should be noted that the core 220 is made of the same conductive material as the first cable core 110 and the second cable core 120. The core 220 has a cross section with the first and

second cores

110 and 120, but has a small influence on the electrical conductivity.

In another embodiment, the area of the lower surface of the carrier part 210 in contact with the liquid surface of the expansion liquid 300 is equal to the area of the liquid surface of the expansion liquid 300; the expansion liquid 300 expands by heat, and the bearing part 210 is lifted up and the spring 400 contracts. The area of the lower surface of the carrying part 210 is equal to that of the liquid surface of the expansion liquid 300, so that the acting force of the liquid surface completely acts on the carrying part 210, and the expansion liquid 300 can be prevented from leaking from the side edge of the carrying part 210.

Further, the side of the bottom of the bearing part 210 is provided with the sealant 500, which plays a role in sealing the gap between the side of the bearing part 210 and the accommodating cavity 600, and prevents the expansion liquid 300 from leaking out of the gap when expanding.

In another embodiment, the expansion fluid 300 is mercury. Of course, in other embodiments, the expansion fluid 300 may be a liquid material with a large thermal expansion coefficient.

In another embodiment, the outer fire-resistant protective layer 100 is wrapped with an anti-aging layer 140. The anti-aging layer 140 further protects the outer fireproof protection layer 100, and prevents the outer fireproof protection layer 100 from aging and degrading fireproof capacity due to environmental factors such as sunlight, rain and the like.

Specifically, the outer fireproof protective layer 100 is made of polyimide. The anti-aging layer 140 is made of polybenzimidazole. Of course, in other embodiments, other materials with good fire-proof effect can be used for the outer fire-proof protection layer 100; the anti-aging layer 140 can also be made of other materials with good anti-aging effect; and not limited to only the materials mentioned in the above embodiments.

Above, only the preferred embodiment of the present invention has been described, the present invention is not limited to the above embodiment, and the technical effects of the present invention can be achieved by the same means, which all belong to the protection scope of the present invention.

Claims

1. A novel fireproof cable is characterized by comprising an outer fireproof protection layer, a first cable core and a second cable core, wherein the first cable core and the second cable core are arranged in the outer fireproof protection layer; an accommodating cavity is formed in the outer fireproof protection layer, expansion liquid and a connecting core positioned on the liquid level of the expansion liquid are arranged in the accommodating cavity, and the connecting core is communicated with the first cable core and the second cable core; the expansion liquid is heated to expand and lift up the connecting core, so that the first cable core and the second cable core are disconnected; the connecting core comprises a bearing part and a core body arranged in the bearing part; the bearing part is connected with the top wall of the accommodating cavity through a spring.

2. The novel fireproof cable according to claim 1, wherein the area of the lower surface of the bearing part in contact with the liquid level of the expansion liquid is equal to the area of the liquid level of the expansion liquid.

3. The novel fireproof cable of claim 2, wherein the bottom of the bearing part is provided with a sealant at its side edge.

4. A novel fire protection cable according to any one of claims 1 to 3, wherein said expansion fluid is mercury.

5. The novel fire-resistant cable according to claim 4, wherein the outer fire-resistant protective layer is wrapped with an anti-aging layer.

6. A novel fire-resistant cable as claimed in claim 5, characterized in that said outer fire-resistant protective layer is made of polyimide.

7. A novel fire-resistant cable according to claim 5, wherein said anti-aging layer is made of polybenzimidazole.