CN205751626U - A kind of mineral insulated cable - Google Patents

Abstract

The utility model discloses a mineral insulated fireproof cable, which comprises a cable core, an inorganic heat-insulating fireproof filler is filled in the gap of the cable core, a high-temperature mineral wrapping tape is wrapped around the cable core, and a high-temperature mineral wrapping tape is wrapped around the cable core. The flame-retardant and fire-proof layer is extruded outside, and the inorganic mineral oxygen barrier layer is extruded outside the flame-retardant fire-proof layer, and the inorganic mineral oxygen barrier layer is covered with a corrugated stainless steel sheath; the cable core is composed of five insulated wire cores and two Copper single wires are twisted, one of the insulated wire cores is set in the center, and the other four are symmetrically arranged on the edge of the cable core in groups of two with the central insulated wire core as the axis; two copper single wires are centered with the central insulated wire The core is arranged axially symmetrically in the cable core. The utility model has the advantages of large cut-off flow, strong overload resistance, strong radiation resistance, anti-rat, anti-ant and the like.

Description

A mineral insulated fireproof cable

technical field

The utility model relates to the field of power cables, in particular to a mineral insulated 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 may 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. However, the existing cables have unsatisfactory fire performance. When a fire occurs, the risk of data loss is high, and the transmission effect of information and power is not good. Therefore, there is an urgent need to develop a new type of mineral insulated fireproof cable.

Utility model content

The technical problem to be solved by the utility model is to provide a cable with anti-rat, anti-ant, anti-radiation functions, good cable stability, long service life, high temperature resistance level, large cut-off flow, strong overload resistance and high safety. Mineral insulated fireproof cables.

A mineral insulated fireproof cable described in the utility model includes a cable core, an inorganic heat-insulating fireproof filler is filled in the gap of the cable core, a high-temperature mineral wrapping tape is wrapped around the cable core, and a high-temperature mineral wrapping tape is wrapped around the cable core. The flame-retardant and fire-proof layer is extruded outside, and the inorganic mineral oxygen barrier layer is extruded outside the flame-retardant fire-proof layer, and a corrugated stainless steel sheath is placed on the inorganic mineral oxygen barrier layer; the cable core is composed of five insulated wire cores and two Copper single wires are twisted, one of the insulated wire cores is set in the center, and the other four are symmetrically arranged on the edge of the cable core in groups of two with the central insulated wire core as the axis; two copper single wires are centered with the central insulated wire The core is axisymmetrically arranged in the cable core.

As a further improvement, the insulated wire core is composed of an aluminum conductor, a composite mineral insulating layer extruded outside the aluminum conductor, and a halogen-free flame-retardant tape extruded outside the composite mineral insulating layer.

As a further improvement, the composite mineral insulating layer is composed of non-alkali glass fiber tape and a mixed glue layer coated in the non-alkali glass fiber tape with an outer thickness of 0.03-0.05 mm.

As a further improvement, the corrugated stainless steel sheath is coated with a fireproof paint layer with a thickness of 2-4mm.

The beneficial effects of the utility model are:

1. The utility model adopts a copper-aluminum composite conductor structure, which can take into account the high conductivity, high flame retardancy, non-toxic and environmental protection performance of the cable, and can also effectively save copper resources and reduce the cost of the cable; the conductor contact resistance is small and the mechanical strength is high. , The light transmittance is high when the cable is burning, the cable has excellent electrical conductivity, flame retardant and environmental protection performance, and galvanic corrosion resistance, reasonable price, long life, and light weight, convenient transportation and installation, reducing transportation and installation costs;

2. The melting point of the composite mineral insulating layer is 1375°C, and the temperature resistance can reach 1020°C, does not contain organic polymer insulating materials, thereby eliminating the generation of carbon particles and improving electrical stability;

3. The outer sheath is made of corrugated stainless steel sheath, which has good mechanical and physical properties. Even if the cable is deformed to a certain extent, it can still work normally, and its electrical properties will not be damaged by severe mechanical damage; at the same time, it is non-magnetic. The stainless steel sheath prevents the wire from eddy current phenomenon, which improves the interception capacity of the cable; when laying, it is not necessary to pass through the pipe separately, and it is directly laid, and has good fireproof, waterproof, and impact-proof functions;

4. The outer sheath is coated with paint, which has the functions of anti-rat, anti-ant and anti-radiation. The cable has good stability, long service life, high temperature resistance level, large cut-off flow, strong overload resistance and high safety;

5. The inorganic mineral oxygen barrier layer can block oxygen, and the ceramic silicone rubber can form a ceramic insulating layer, thus providing more time for data transmission in a fire, effectively preventing data loss, and ensuring the transmission of information and power as well as electrical equipment and lines safe operation;

6. Since the cables are made of inorganic materials and have strong radiation resistance, the electrical and mechanical properties of the cables will not change after being subjected to nuclear radiation.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a schematic structural view of the composite mineral insulating layer of the present invention.

detailed description

As shown in Figure 1, a mineral insulated fireproof cable described in the utility model includes a cable core, and the cable core is formed by twisting five insulated cores and two copper single wires 1, one of which is The core is set in the center, and the other four are symmetrically arranged on the edge of the cable core in groups of two with the central insulated core as the axis. The five insulated cores are in the shape of "I"; Axisymmetrically arranged in the cable core; the insulated wire core consists of an aluminum conductor 2, a composite mineral insulating layer 3 extruded outside the aluminum conductor 2, and a halogen-free flame-retardant tape extruded outside the composite mineral insulating layer 3 4 composition: fill the gap of the cable core with inorganic heat-insulating and fire-proof filler 5, wrap the high-temperature mineral wrapping tape 6 outside the cable core, extrude the flame-retardant and fire-proof layer 7 outside the high-temperature mineral wrapping tape 6, and The flameproof layer 7 is extruded with an inorganic mineral oxygen barrier layer 8, and a corrugated stainless steel sheath 9 is placed outside the inorganic mineral oxygen barrier layer; a fireproof coating layer with a thickness of 2-4mm is coated on the corrugated stainless steel sheath.

As shown in FIG. 2 , the composite mineral insulating layer 3 is composed of an alkali-free glass fiber tape 31 and a mixed adhesive layer 32 coated inside the non-alkali glass fiber tape with an outer thickness of 0.03-0.05 mm.

The utility model provides an idea and method for a mineral insulated fireproof cable. There are many methods and approaches for realizing the technical solution. The above description is only a preferred implementation mode of the utility model. As far as people are concerned, some improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (4)

1. a mineral insulated cable, it is characterized in that: include cable core, inorganic thermal insulation fire-proof packing is filled in the gap of cable core, at the outer wrapped high temperature mineral matter twining package tape of cable core, fire-retardant fireproof layer is extruded outside high temperature mineral matter twining package tape, outside fire-retardant fireproof layer, extrude inorganic mineral oxygen barrier layer, outside inorganic mineral oxygen barrier layer, be set with ripple stainless steel sheath；Described cable core is formed by five insulated wire cores and two copper single lines are stranded, and wherein an insulated wire cores is centrally disposed, and the insulated wire cores at other four Gen Yi centers is the edge that two one group of axle center is symmetricly set on cable core；Two copper single lines are symmetricly set in cable core with the insulated wire cores at center for axle center.

Mineral insulated cable the most according to claim 1, it is characterised in that: complex mineral insulating barrier that described insulated wire cores by aluminium conductor, is extruded in outside aluminium conductor and the halogen-free flameproof band being extruded in outside complex mineral insulating barrier are constituted.

Mineral insulated cable the most according to claim 2, it is characterised in that: described complex mineral insulating barrier is by alkali-free glass fibre band and is coated in the mixing glue-line that the inside and outside face thickness of alkali-free glass fibre band is 0.03-0.05mm and constitutes.

Mineral insulated cable the most according to claim 1, it is characterised in that: it is coated with the fireproof coating layer that thickness is 2-4mm outside described ripple stainless steel sheath.