CN202694950U - Multicore fire-resisting power cable - Google Patents

Abstract

The utility model discloses a multicore fire-resisting power cable which comprises a plurality of alloy conductors and an insulated wire core; the insulated wire core is formed by wrapping a fire-resisting layer and an insulating layer made of ceramic silicon rubber materials outside the plurality of the alloy conductors respectively in sequence; the insulated core is twisted into a bundle to form a cable core by using a filling core twisted and bound by the heat-resisting glass fiber as the center; a twisting tape layer is coated outside the cable core, and the twisting tape layer takes a heat-resisting polyester twisting tape as an inner layer and a heat-resisting glass fiber tape as an outer layer; a heat-resisting magnesium oxide powder is arranged between the twisting tape layer and the cable core and combined with the glass fiber tape to form a filling layer; an inner sheath layer, an armor layer, and an outer sheath layer are arranged outside the winding wrapped layer in sequence. Due to the structural design of heat-resisting layer, the filling core, the filler layer, and the wrapping layer, the fireproof and fire resistance performance of electric cable is greatly improved; and meanwhile, the insulation layer made of ceramic silicon rubber materials is more helpful to protect the cable core in the high-temperature environment and guarantee the smooth transmission of information.

Description

A multi-core fire-resistant power cable

Technical field:

The utility model relates to the technical field of power cables, in particular to a multi-core fire-resistant power cable.

Background technique:

With the rapid development of my country's economy and human rights, all walks of life pay more and more attention to fire safety, especially in places with very high requirements for public fire protection and fire safety, the requirements for cable fire protection and fire resistance performance have also increased.

Therefore, how to design a multi-core fire-resistant power cable, which can effectively ensure the smooth flow of power and communication, and win valuable time for personnel evacuation and rescue in case of fire, is an urgent problem to be solved at present.

Utility model content:

In order to make up for the deficiencies of the existing technology, the purpose of the utility model is to provide a multi-core fire-resistant power cable, which is used in the voltage range of 10kV and below, and has the properties of high temperature resistance and fire prevention.

The technical scheme of the utility model is as follows:

A multi-core fire-resistant power cable, including multiple alloy conductors, is characterized in that: the multiple alloy conductors are respectively wrapped with a refractory layer and an insulating layer of ceramic silicone rubber material to form an insulated core, and the insulated core is twisted with high-temperature resistant glass wire The filling core of the composite bundle is stranded in the center to form a cable core, and the cable core is wrapped with a wrapping layer, the wrapping layer is wrapped with a high-temperature resistant polyester tape to form an inner layer, and a high flame-retardant glass fiber tape is used to form an outer layer. Between the layer and the cable core, there is a combination of high-temperature-resistant magnesium oxide powder and glass fiber tape to form a filling layer, and an inner sheath layer, an armor layer, and an outer sheath layer are arranged around the cladding layer in turn.

The multi-core fire-resistant power cable is characterized in that: the covering rate of the inner layer of the wrapping layer is not less than 25%, and the covering rate of the outer layer is not less than 30%.

The multi-core fire-resistant power cable is characterized in that: the inner sheath layer and the outer sheath layer are made of extruded silicon rubber material.

The beneficial effects of the utility model are:

The utility model has a structural design of a refractory layer, a filling core, a filling layer, and a wrapping layer, which greatly improves the fireproof and fireproof performance of the cable. The protective function of the core ensures the smooth transmission of information; the inner sheath layer and the outer sheath layer are made of tear-resistant and wear-resistant silicone rubber material, which has excellent oil resistance and temperature resistance.

Description of drawings:

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

Detailed ways:

See Figure 1:

The multi-core fire-resistant power cable includes a plurality of alloy conductors 1, which are respectively wrapped with a refractory layer 2 and an insulating layer 3 of ceramic silicone rubber material to form an insulated core, which is twisted with high-temperature-resistant glass wire. The filler core 4 of the composite bundle is stranded in the center to form a cable core, and the cable core is wrapped with a wrapping layer 5, and the wrapping layer 5 is wrapped with a high-temperature resistant polyester tape to form an inner layer 5-1, and a high flame-retardant glass fiber tape Constitute the outer layer 5-2, between the wrapping layer 5 and the cable core, there is a combination of high temperature resistant magnesium oxide powder and glass fiber tape to form the filling layer 6, and the outer wrapping layer 5 is sequentially provided with an inner sheath layer 7, an armor layer 8. Outer sheath layer 9.

The covering rate of the inner layer 5-1 of the wrapping layer 5 is not less than 25%, and the covering rate of the outer layer 5-2 is not less than 30%.

The inner sheath layer 7 and the outer sheath layer 9 are made of extruded silicon rubber material.

For the material selection of the insulating layer-ceramic silicone rubber makes the cable have good fire protection and fire protection properties. Under the high temperature and flame ablation above 500 °C, the organic component will be ablated and transformed into hard in a short time. The ceramic material forms a good insulating layer to prevent the flame from continuing to burn, and the longer the ablation time and the higher the temperature, the more obvious the hard effect. Some types of ceramic refractory silicone rubber can withstand 1200-1500 ℃, therefore, the cable in a high temperature environment can win valuable time for personnel evacuation and rescue in case of fire.

Claims (3)

1. multicore fireproof power cable, comprise many alloy conductors, it is characterized in that: comprise that many alloy conductors are enclosed with respectively flame retardant coating outward successively, the insulating barrier of ceramic silastic material consists of insulated wire cores, insulated wire cores stranded bunchy centered by the filled core of the synthetic bundle of pyroceram skein silk consists of cable core, cable core is wrapped with lapping layer, lapping layer adopts the wrapped formation internal layer of high temperature resistance polyester band, the high flame retardant glass fiber tape consists of outer, be provided with high temperature oxidation resisting magnesium dust and glass fibre belt between lapping layer and the cable core and be combined to form packed layer, lapping layer is provided with inner restrictive coating outward successively, armour, external sheath layer.

2. multicore fireproof power cable according to claim 1, it is characterized in that: the wrapped rate of putting up of the internal layer of described lapping layer is not less than 25%, and the outer wrapped rate of putting up is not less than 30%.

3. multicore fireproof power cable according to claim 1 is characterized in that: described inner restrictive coating, external sheath layer adopt silastic material to extrude formation.

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