CN212032738U

CN212032738U - Low-voltage fireproof electric wire

Info

Publication number: CN212032738U
Application number: CN202020668453.2U
Authority: CN
Inventors: 沈亚平
Original assignee: Chongqing Xiye Wire And Cable Technology Co Ltd
Current assignee: Chongqing Xiye Wire And Cable Technology Co Ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-11-27
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses a low pressure fire prevention electric wire, including conductor, the fire-retardant pottery polyolefin of steamed low cigarette, the fire-retardant polyolefin of silane cross-linking low cigarette halogen-free. The conductor is simultaneously extruded with a layer of halogen-free low-smoke flame-retardant ceramic polyolefin and silane cross-linked low-smoke halogen-free flame-retardant polyolefin. The utility model discloses under the normal atmospheric temperature state, there is not steamed low fire-retardant ceramic polyolefin plastify back of cigarette, form sealed one deck insulating layer on the conductor surface, have insulating effect. When the electric wire is in a high-temperature state, the halogen-free low-smoke flame-retardant ceramic polyolefin insulating layer can form a ceramic insulating shell, so that the electric wire can be prevented from short circuit, and the normal operation of electric power is ensured.

Description

Low-voltage fireproof electric wire

Technical Field

The utility model relates to a low voltage electric wire especially relates to a low pressure fire prevention electric wire.

Background

In the electrical fire in China, the fire is caused by the wires and the cables, and occupies the first place in the electrical fire.

Among household electric wires, a polyvinyl chloride electric wire is generally used. When a fire disaster or a line is overloaded, the polyvinyl chloride can be directly melted by the generated high temperature, a large amount of harmful substances such as hydrogen chloride gas and halogen can be generated in the process of melting, and the human body is easy to suffocate and even die after absorbing a large amount of hydrogen chloride gas.

Therefore, the technical personnel in the field are dedicated to develop a low-voltage fireproof electric wire, the utility model discloses under the normal atmospheric temperature state, after the plastify of the low fire-retardant pottery porcelainized polyolefin of steamed low cigarette, form sealed one deck insulating layer on the conductor surface, have insulating effect. When the electric wire is in a high-temperature state, the halogen-free low-smoke flame-retardant ceramic polyolefin insulating layer can form a ceramic insulating shell, so that the electric wire can be prevented from short circuit, and the normal operation of electric power is ensured.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of prior art, the utility model aims to solve the technical problem that a low pressure fire prevention electric wire is provided, when the electric wire is in high temperature state, there is not steamed low fire-retardant pottery porcelain polyolefin insulating layer of cigarette and can form ceramic insulating housing, plays the insulating effect of guaranteeing the normal circular telegram of circuit.

In order to achieve the above object, the utility model provides a low pressure fire prevention electric wire, which comprises a conductor, the outer plastify one deck encapsulated situation's of conductor halogen-free low cigarette flame retardant pottery polyolefin, the outer plastify one deck silane crosslinking low cigarette halogen-free flame retardant polyolefin of halogen-free low cigarette flame retardant pottery polyolefin.

Preferably, the thickness of the halogen-free low-smoke flame-retardant ceramic polyolefin is 0.4-0.5 mm. If the thickness of the halogen-free low-smoke flame-retardant ceramic polyolefin is less than 0.4mm, the halogen-free low-smoke flame-retardant ceramic polyolefin cannot normally form an insulating shell under the high-temperature condition, and cannot play an insulating role, if the thickness of the halogen-free low-smoke flame-retardant ceramic polyolefin is more than 0.5mm, the thickness of the insulating layer can be increased according to the requirement of national standards on insulating performance, and the overall diameter of the wire is influenced.

Preferably, the halogen-free low-smoke flame-retardant ceramic polyolefin is plasticized into a sealed insulating layer.

Preferably, the thickness of the halogen-free low-smoke silane crosslinked polyethylene is 0.3 mm-0.5 mm.

Preferably, the halogen-free low-smoke flame-retardant ceramic polyolefin and the silane cross-linked low-smoke halogen-free flame-retardant polyolefin are extruded simultaneously by a double-layer co-extrusion machine head. The double-layer co-extrusion machine head is adopted for simultaneous extrusion, and the halogen-free low-smoke flame-retardant ceramic polyolefin and the conductor are tightly coated without gaps.

The utility model has the advantages that: the utility model adopts the plasticized and sealed halogen-free low-smoke flame-retardant ceramic polyolefin as the insulating material, and the plasticized and sealed halogen-free low-smoke flame-retardant ceramic polyolefin plays an insulating role at normal temperature; when a fire disaster occurs or the conductor is at a high temperature, the halogen-free low-smoke flame-retardant ceramic polyolefin can quickly form a ceramic insulating shell, and the halogen-free low-smoke flame-retardant ceramic polyolefin does not produce harmful substances under a high-temperature environment, does not contain carcinogenic substances such as lead, mercury and the like, and is environment-friendly.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein it is noted that, in the description of the invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular manner, and therefore should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "connected" are to be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, a low voltage cable, including conductor 1, conductor 1 plasticizes the fire-retardant pottery polyolefin 2 of halogen-free low cigarette of one deck encapsulated situation outward, and the thickness of the fire-retardant pottery polyolefin 2 of halogen-free low cigarette is 0.4mm ~ 0.5mm, and in this embodiment, the thickness of the fire-retardant pottery polyolefin 2 of halogen-free low cigarette is 0.45mm, and the thickness of the fire-retardant pottery polyolefin 2 of halogen-free low cigarette adopts 0.42mm, 0.44mm, 0.46mm, 0.48mm, 0.5mm also can reach in other embodiments the utility model discloses the effect.

The thickness of silane cross-linking low smoke zero halogen flame retardant polyolefin 3 is 0.3mm ~ 0.5mm, and in this embodiment, the thickness of silane cross-linking low smoke zero halogen flame retardant polyolefin 3 is 0.5mm, and the thickness of silane cross-linking low smoke zero halogen flame retardant polyolefin 3 in other embodiments adopts 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm also can reach the utility model discloses the effect.

There is not steamed low fire-retardant ceramic polyolefin 2 plastify of cigarette for one deck sealing insulation layer, in this embodiment, there is not steamed low fire-retardant ceramic polyolefin 2 of cigarette to wrap up and cover on 1 surface of conductor, and the plastify reaches for the sealed insulating layer of one deck the utility model discloses the effect. The halogen-free low-smoke flame-retardant ceramic polyolefin 2 is externally extruded with silane cross-linked low-smoke halogen-free flame-retardant polyolefin 3, and the halogen-free low-smoke flame-retardant ceramic polyolefin 2 and the silane cross-linked low-smoke halogen-free flame-retardant polyolefin 3 are simultaneously extruded by a double-layer co-extruder head.

During processing, the large granular halogen-free low-smoke flame-retardant ceramic polyolefin 2 is heated and plasticized, and is extruded and coated on the conductor 1 through a double-layer co-extrusion machine head to form the wire.

The plasticized sealing insulating layer of the halogen-free low-smoke flame-retardant ceramic polyolefin 2 plays an insulating role for the conductor 1 at normal temperature. When conductor 1 temperature is higher, or when taking place the conflagration, there is not steamed low fire-retardant pottery porcelain of cigarette polyolefin 2 can form ceramic form insulating housing rapidly, and the ceramic form casing of formation does not drip, except having excellent insulating properties, still has fabulous thermal-insulated effect of oxygen insulation, can effectively keep apart the inside damage of high temperature flame to the circuit, delays the decomposition of inside material, avoids conductor 1 fusing in flame, guarantees the unblocked of circuit under the conflagration condition. When the conductor 1 has high temperature due to overload, the ceramic tile shell formed by the halogen-free low-smoke flame-retardant ceramic polyolefin 2 reduces the heat output to the external environment, prevents the high temperature from damaging the silane crosslinking low-smoke halogen-free flame-retardant polyolefin 3, and avoids causing greater disasters.

Compared with the traditional polyolefin insulating material, the energy consumption for producing and processing the halogen-free low-smoke flame-retardant ceramic polyolefin 2 is lower, and the process operation is simpler. The method is widely applied to severe environment places such as household circuits, automobile wires, steel, metallurgy and the like.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A low pressure fire prevention electric wire, characterized by: including conductor (1), conductor (1) outer plastify one deck sealing state's steamed low cigarette fire-retardant pottery porcelain polyolefin (2), the silane cross-linking low cigarette fire-retardant polyolefin (3) of steamed low cigarette fire-retardant pottery porcelain polyolefin (2) outer plastify one deck sealing state.

2. A low voltage fire-resistant electrical wire as claimed in claim 1, wherein: the thickness of the halogen-free low-smoke flame-retardant ceramic polyolefin (2) is 0.4-0.5 mm.

3. A low voltage fire-resistant electrical wire as claimed in claim 1, wherein: the halogen-free low-smoke flame-retardant ceramic polyolefin (2) is plasticized into a sealed insulating layer.

4. A low voltage fire-resistant electrical wire as claimed in claim 1, wherein: the thickness of the silane crosslinking low-smoke halogen-free flame retardant polyolefin (3) is 0.3 mm-0.5 mm.

5. A low voltage fire-resistant electrical wire as claimed in claim 1, wherein: the halogen-free low-smoke flame-retardant ceramic polyolefin (2) and the silane cross-linked low-smoke halogen-free flame-retardant polyolefin (3) are extruded simultaneously by a double-layer co-extrusion machine head.