CN205542120U - Insulating flexible fireproof cable of mineral substance - Google Patents

Abstract

The utility model discloses a mineral insulated flexible fireproof cable. The cable contains at least one cable core unit, and the cable core unit sequentially includes a wire core, an inorganic mineral tape wrapping layer and a color separation layer from the inside to the outside. Including ceramic silicone rubber layer, inorganic mineral high flame retardant sheath, aluminum or aluminum alloy sheath and fireproof sheath layer coated on the outer periphery of the cable core unit in sequence from the inside to the outside, the ceramic silicone rubber layer and the cable core unit The gaps between them are filled with inorganic mineral insulating fillers. The mineral insulated flexible fireproof cable has a reasonable structure. The copper sheath in the prior art is replaced by an aluminum or aluminum alloy sheath, and an inorganic mineral high flame-retardant sheath and ceramic silicon are sequentially arranged in the aluminum alloy sheath. Rubber layer, the cable has light weight and good flexibility; in the burning state, the inorganic mineral high flame-retardant sheath can prevent the cable from further burning, and the ceramic silicone rubber can form a ceramic insulating layer to effectively protect the inner layer of wires and fillers.

Description

A mineral insulated flexible fireproof cable

technical field

The utility model relates to the technical field of fireproof cables, in particular to a mineral insulated flexible fireproof cable.

Background technique

Cables are widely used in control installation, equipment connection, and power transmission, and are an indispensable and important transmission medium in industry and civil use. Cables have various specifications and models to meet the needs of different equipment and transmission purposes. Cables can short or open during use, causing power and information transmission to fail. In the event of a fire, the cable needs to have a certain fire protection function, so as to ensure that the data can be effectively saved before the line is paralyzed, reduce the risk of data loss, and ensure that the cable can ensure the safety of electrical equipment and lines during the power transmission process. run.

In the prior art, BTTZ uses a copper sheath, which is difficult to bend and form at the entrance and exit of the wiring box and in the bridge frame, and has a large dead weight; YTTW uses a copper bellows, and its flexibility has been improved to a certain extent, but the dead weight is not improved. Obviously, BTLY uses a seamless metal tube as the sheath, which is difficult to bend. In addition, the copper sheath formed by longitudinal welding of the copper strip has the same defect as BTTZ that it is difficult to bend and form. CN204143893U discloses a high-performance aluminum-sheathed multi-core fireproof cable, including more than two core units, the core unit includes an oxygen-free copper conductor, and the oxygen-free copper conductor is covered with a mica tape, a first inorganic mineral insulating tape, a second A ceramic silicone rubber and extruded plastic layer; more than two core units constitute the core body, and the core body is covered with a second inorganic mineral insulating tape, a second ceramic silicone rubber, an aluminum sheath and a halogen-free low-smoke Flame retardant polyolefin jacket. In the above cable structure, the outer structure of the oxygen-free copper conductor in the core unit structure is complex, which further affects the flexibility of the aluminum alloy. Therefore, it is necessary to improve the structure of the insulated fireproof flexible cable in the prior art.

Utility model content

The purpose of the utility model is to overcome the defects in the prior art and provide a mineral insulated flexible fireproof cable with light weight and high flexibility.

In order to achieve the above technical effects, the technical solution of the present invention is: a mineral insulated flexible fireproof cable, characterized in that the cable contains at least one cable core unit, and the cable core unit sequentially includes Conductor core, inorganic mineral tape around the cladding and color separation layer, the cable also includes ceramic silicon rubber layer, inorganic mineral high flame retardant sheath, aluminum or aluminum The alloy sheath and the fireproof sheath layer, the gap between the ceramic silicon rubber layer and the cable core unit is filled with inorganic mineral insulating filler.

The preferred technical solution is that the material of the wrapping layer of the inorganic mineral tape is double-sided synthetic fluorphlogopite mica tape. Double-sided synthetic fluorine phlogopite tape is made of synthetic fluorine phlogopite paper as the base material, glass fiber cloth as double-sided reinforcement material, and glued with silicone adhesive. It has good flexibility and tensile strength. It has dual functions of fire resistance and insulation on the surface of the wire, which helps to improve the flexibility of the cable.

In order to reduce the weight of the cable, further improve the flexibility of the cable, and facilitate the transportation of the cable and the erection of the cable, the preferred technical solution is that the aluminum or aluminum alloy sheath is selected from corrugated aluminum tubes, longitudinally wrapped aluminum foils, wrapped aluminum foils, One of corrugated aluminum alloy tubes, longitudinally wrapped aluminum alloy foils, and wrapped aluminum alloy foils.

In order to simplify the surface layer structure of the cable core unit, the preferred technical solution is that the material of the color separation layer is polyolefin or ceramic silicone rubber.

In order to further optimize the flexibility of the cable, a preferred technical solution is that the wire core is a stranded copper conductor.

In order to ensure the flame-retardant effect of the cable, the preferred technical solution is that the inorganic mineral high-flame-retardant sheath is a glass fiber tape-wrapped sheath.

In order to ensure the insulation effect between the wire and the outer sheath, the preferred technical solution is that the material of the inorganic mineral insulating filler is magnesium oxide or alkali-free glass wire.

A further preferred technical solution is that the aluminum or aluminum alloy sheath is a bellows made of aluminum alloy. Aluminum alloy can choose aluminum alloy with higher melting point to ensure higher high temperature resistance effect under fire conditions.

Advantage and beneficial effect of the present utility model are:

The mineral insulated flexible fireproof cable has a reasonable structure. The copper sheath in the prior art is replaced by an aluminum or aluminum alloy sheath, and an inorganic mineral high flame-retardant sheath and ceramic silicon are sequentially arranged in the aluminum alloy sheath. Rubber layer, the cable has light weight and good flexibility; in the burning state, the inorganic mineral high flame-retardant sheath can prevent the cable from further burning, and the ceramic silicone rubber can form a ceramic insulating layer to effectively protect the inner layer of wires and fillers.

Description of drawings

Fig. 1 is a structural schematic diagram of embodiment 1 of the mineral insulated flexible fireproof cable of the present invention;

Fig. 2 is a structural schematic diagram of Embodiment 2 of the mineral insulated flexible fireproof cable of the present invention.

In the figure: 1. Cable core unit; 11. Wire core; 12. Inorganic mineral tape wrapping layer; 13. Color separation layer; 2. Ceramic silicone rubber layer; 3. Inorganic mineral high flame-retardant sheath; 4. Aluminum or aluminum alloy sheath; 5. Fireproof sheath layer; 6. Inorganic mineral insulating filler.

detailed description

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is further described. The following examples are only used to illustrate the technical solution of the utility model more clearly, but not to limit the protection scope of the utility model.

Example 1

As shown in Figure 1, the mineral insulated flexible fireproof cable of Example 1 contains two cable core units 1 in the cable, and the cable core unit 1 sequentially includes a wire core 11, an inorganic mineral tape around the cladding 12 and The color separation layer 13, the cable also includes a ceramic silicon rubber layer 2, an inorganic mineral high flame-retardant sheath 3, an aluminum or aluminum alloy sheath 4, and a fireproof sheath 5 that are sequentially coated on the outer periphery of the cable core unit from the inside to the outside , the gap between the ceramized silicone rubber layer 2 and the cable core unit 1 is filled with an inorganic mineral insulating filler 6 .

The material of the inorganic mineral tape around the cladding 12 is double-sided synthetic fluorphlogopite mica tape. Single-sided fluorine phlogopite mica tape can also be used. Compared with double-sided synthetic fluorine phlogopite mica tape, double-sided mica tape has greater mechanical strength, which helps to ensure the uniform distribution of mica tape on the surface of the wire.

The aluminum or aluminum alloy sheath 4 is longitudinally wrapped with aluminum foil, and the seams of the longitudinally wrapped joints are fixedly connected by welding.

The wire core 11 is a solid copper wire; the material of the color separation layer 13 is polyolefin; the inorganic mineral high flame-retardant sheath 3 is a wrapping layer of glass fiber tape; the material of the inorganic mineral insulating filler 6 is magnesium oxide.

Example 2

As shown in Figure 2, Embodiment 2 is based on Embodiment 1. The difference between the technical solution of Embodiment 2 and Embodiment 1 is: the wire core 11 is a stranded copper conductor; the material of the color separation layer 13 is ceramics formed by extrusion. Silicone rubber layer; the aluminum or aluminum alloy sheath 4 is a bellows made of aluminum alloy; the material of the inorganic mineral insulating filler 6 is alkali-free glass wire.

Embodiment 2 On the basis of Embodiment 1, a stranded copper conductor is adopted, the color separation layer adopts a ceramic silicon rubber layer, and the sheath is a bellows made of aluminum alloy, and the material of the inorganic mineral insulating filler is alkali-free glass filaments. The sample of 2 is more flexible than the sample of Example 1.

The core unit in the cable can be one or 2-5, depending on the specific use of the cable.

The above is only the preferred embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and modifications can also be made. And retouching should also be regarded as the protection scope of the present utility model.

Claims (8)

1. A mineral insulated flexible fireproof cable, characterized in that the cable contains at least one cable core unit, and the cable core unit sequentially includes a wire core, an inorganic mineral tape around the cladding and a sub-layer from the inside to the outside. color layer, the cable also includes a ceramic silicon rubber layer, an inorganic mineral high flame-retardant sheath, an aluminum or aluminum alloy sheath, and a fireproof sheath layer that are sequentially coated on the outer periphery of the cable core unit from the inside to the outside. The gap between the silicone rubber layer and the cable core unit is filled with inorganic mineral insulating fillers. 2. The mineral insulated flexible fireproof cable according to claim 1, characterized in that, the material of the inorganic mineral tape wrapping layer is double-sided synthetic fluorphlogopite mica tape. 3. The mineral insulated flexible fireproof cable according to claim 1, wherein the aluminum or aluminum alloy sheath is selected from corrugated aluminum tubes, longitudinally wrapped aluminum foils, wrapping aluminum foils, corrugated aluminum alloy tubes, longitudinally wrapped One of aluminum alloy foil and wrapped aluminum alloy foil. 4. The mineral insulated flexible fireproof cable according to claim 1, wherein the material of the color separation layer is polyolefin or ceramic silicone rubber. 5. The mineral insulated flexible fireproof cable according to claim 1, wherein the wire core is a stranded copper conductor. 6. The mineral insulated flexible fireproof cable according to claim 1, characterized in that the inorganic mineral high flame retardant sheath is a glass fiber tape wrapping. 7. The mineral insulated flexible fireproof cable according to claim 1, characterized in that the inorganic mineral insulating filler is made of magnesium oxide or alkali-free glass filaments. 8. The mineral insulated flexible fireproof cable according to claim 3, wherein the aluminum or aluminum alloy sheath is a corrugated tube made of aluminum alloy.