CN206516377U - A kind of isolated form flexible mineral matter insulated cable - Google Patents

Abstract

The utility model discloses an isolated flexible mineral insulated cable, which is mainly composed of an outer layer and a plurality of wire cores arranged inside, and each wire core is sequentially provided with a metal conductor, an insulating layer, a metal A protective layer and a spacer, the outer layer includes a cladding layer and a sheath layer, and an isolation filler is filled between the outer surface of the spacer sheath and the sheath of each strand of wire core, and the isolation filler is made of composite minerals Filler, the metal protective layer and the isolation sleeve are integrally tightened and rolled to form several embossed lines, which increase the wrapping area of the outer layer of the metal conductor through the entire embossed lines, and when subjected to high temperature heat, the composite mineral filler reacts and hardens the crust Attached to form a thick protective barrier, and the cladding is formed by weaving glass fiber strips that are overlapped and wrapped by cables, which increases the flexibility of the cable and is convenient for installation and use. The overall structure forms a double barrier to improve the fire resistance and strength of the cable. , and high electrical performance stability.

Description

An isolated flexible mineral insulated cable

technical field

The utility model relates to the technical field of wires and cables, in particular to an isolated flexible mineral insulated cable.

Background technique

In existing buildings, wires and cables are used to connect various supporting electrical equipment, which is the most important layout product for living and using electrical safety. Because traditional wires and cables generally use copper sleeves, their protective shielding efficiency is low and the cost is relatively high. High, the isolation layer is made of material with low heating temperature, which is easy to peel off after high-temperature combustion and cannot form isolation hardening protection. When encountering high temperature or fire, it is very easy to short-circuit or open the wire and cable immediately, and the safety performance of isolation protection needs to be further improved promote.

Utility model content

The purpose of this utility model is to provide an isolated flexible mineral insulated cable to solve the problems of poor isolation protection performance and low structural strength mentioned in the above background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

An isolated flexible mineral insulated cable, mainly composed of an outer layer and a number of strands of wire cores inside, each strand of wire core is provided with a metal conductor, an insulating layer, a metal protective layer and an isolation sleeve in sequence from the inside to the outside , the outer layer includes a cladding layer and a sheath layer, and an isolation filler is filled between the outer surface of the isolation sheath of each strand of the wire core and the cladding layer, and the isolation filler is a composite mineral filler. The metal protective layer and the isolation sleeve are integrally tightened and rolled together.

Preferably, the insulating layer is made of an inorganic mineral polymerized flame-retardant polyolefin material layer.

Preferably, the cladding layer is formed by braiding glass fiber strips that are cabled and overlapped.

Preferably, the metal protection layer and the isolation sleeve are integrally tightened and rolled to form several embossments.

Preferably, the metal protective layer is made of aluminum alloy, and the isolation sleeve is made of mica protective sleeve.

Compared with the prior art, the beneficial effect of the utility model is: through the use of the metal protective layer and the spacer sleeve integrally tightened and rolled to form several embossed lines, the wrapping area of the outer layer of the metal conductor is increased, and by using composite minerals to fill When subjected to high temperature heat, the composite mineral filler reacts and hardens the crust, which is well attached to the outer surface, thus forming a thick protective barrier, blocking the flame from attacking the metal protective layer and the isolation sleeve, and isolating The cover is made of mica protective cover, which has higher stability of heat insulation and isolation. And through the twisting of several strands of conductors and the use of overlapping glass fiber strips to form the cladding, the flexibility of the cable is increased, which is convenient for installation and wiring in the initial state. When the overall structure encounters high-temperature combustion, it will form a Double barrier, improve the fire resistance and strength of the cable, and the stability of electrical performance is high.

Description of drawings

Fig. 1 is a structural cross-sectional schematic view of the utility model;

Fig. 2 is a schematic cross-sectional view of the integral tightening structure of the metal protective layer and the spacer sleeve of the present invention.

In the figure: 1-metal conductor, 2-insulation layer, 3-metal protection layer, 4-isolation sheath, 5-isolation filler, 6-rao cladding, 7-sheath layer.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1, as shown in Figure 2, an isolated flexible mineral insulated cable is mainly composed of an outer layer and a number of strands of wire cores inside, and each strand of wire cores is sequentially provided with metal conductors from the inside to the outside 1. Insulation layer 2, metal protective layer 3 and isolation sleeve 4, wherein the insulation layer 2 adopts inorganic mineral polymerized flame-retardant polyolefin material layer, and the environmental protection cost is low; the outer layer includes a cladding layer 6 and a sheath layer 7, so The space between the outer surface of the isolation sleeve 4 and the cladding 6 of each strand of the wire core is filled with an isolation filler 5, and the isolation filler 5 is a composite mineral filler. When subjected to high temperature heat, the composite mineral filler reacts and hardens. , well attached to the outer surface, thus forming a thick protective barrier, blocking the flame from attacking the metal protective layer and isolation sleeve. The metal protective layer 3 and the isolation sleeve 4 are integrally tightened and rolled together, and rolled to form several embossed lines 41, thereby increasing the wrapping area of the outer layer of the metal conductor 1, so as to improve the overall tightness of the outside. Protection, the cladding layer 6 is made of glass fiber strips that are overlapped and wrapped in cables, which increases the flexibility of the cable and is convenient for installation and wiring in the initial state. In addition, the metal protection layer 3 is made of aluminum alloy, and the isolation sleeve 4. Mica protective cover is used, which has higher stability of heat insulation and isolation.

The overall structure adopts the metal protective layer 3 and the isolation sleeve 4 as a whole to tighten and roll to form several embossed lines, which increases the stress area and strengthens the tightening effect. Thick protective barrier, the isolation sleeve adopts mica protective sleeve to form a double barrier, improve the fire resistance and strength of the cable, and have high electrical performance stability.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (5)

1. An isolated flexible mineral insulated cable, mainly composed of an outer layer and a number of strand cores provided inside, characterized in that: each strand core is sequentially provided with a metal conductor, an insulating layer, The metal protection layer and the spacer cover, the outer layer includes a cladding layer and a sheath layer, and the spacer filler is filled between the outer surface of the spacer sheath of each strand of wire core and the sheath layer, and the spacer filler material is made of composite Mineral filler, the metal protective layer and the isolation sleeve are integrally tightened and rolled together. 2. An isolated flexible mineral insulated cable according to claim 1, characterized in that: the insulating layer is made of inorganic mineral polymerized flame-retardant polyolefin material layer. 3. An isolated flexible mineral insulated cable according to claim 1, characterized in that: the sheath is made of glass fiber strips that are cabled and overlapped. 4. An isolated flexible mineral insulated cable according to claim 1, characterized in that: the metal protective layer and the insulating sleeve are integrally tightened and rolled to form several embossed lines. 5. An isolated flexible mineral insulated cable according to claim 1 or 4, characterized in that: the metal protective layer is made of aluminum alloy, and the isolation sheath is made of mica sheath.