CN202694951U - Light flame-resistant polrvinyl chloride-insulated and sheathed power cable - Google Patents

Abstract

The utility model discloses a light flame-resistant polrvinyl chloride-insulated and sheathed power cable which comprises three large conductors and a small conductor, wherein the three large conductors and the small conductor are externally and respectively packed with a flame-resistant layer, the flame-resistant layers are formed by packing with a double-layer high temperature-resistant polyester belt in an overlapping way, the packing imbricating ratio is not less than 35%, each flame-resistant layer is externally packed with an insulating layer, the three large conductors which are packed with the insulating layers are distributed outside the small conductor shaped like a Chinese character 'PIN', three cushions which are distributed like a Chinese character 'PIN' are arranged between the small conductor and the insulating layers of the three large conductors to be jointly formed into a cable core, the cushions are formed by the extrusion molding of thermoplastic elastomers, the cushions are internally provided with through holes, and the cable core is externally and sequentially packed with a wrapping layer and a sheathing layer. The light flame-resistant polrvinyl chloride-insulated and sheathed power cable is reasonable in structure design, the flame resistance and fire resistance of the power cable can be effectively improved due to the flame-resistant layers and the high temperature-resistant wrapping layers, and the power cable is further good in extrusion resistance and structure compactness, small in dead weight, and convenient to install and pave.

Description

A light flame retardant polyvinyl chloride insulated and sheathed power cable

Technical field:

The utility model relates to the technical field of power cables, in particular to a light-weight flame-retardant polyvinyl chloride insulated and sheathed power cable.

Background technique:

With the expansion of cities, high-rise buildings, hotels, large supermarkets, hospitals, stations, and airports continue to increase, the construction of subways and tunnel traffic, and the increase of large-scale public sports, entertainment venues, and public transportation facilities. Coal mines, chemicals, petroleum, etc. , medicine, military, nuclear power plants, iron and steel, metallurgy, mines, ships, etc., the importance of fire protection and fire safety has been highlighted. How to ensure the smooth flow of power and communication within a certain period of time in the event of a fire, and maximize the win Precious rescue time, reduce casualties and the safety of life and property.

Designers have developed 3+1-core AC power cables with a rated voltage of 0.6/1kv to maximize the fire-resistant and flame-retardant properties of the cables and win valuable rescue time for firefighters. In addition, to improve the anti-extrusion performance and compact structure of the cables , reduce the self-weight of the cable to facilitate installation and laying, and prolong the service life of the cable.

Utility model content:

In order to make up for the existing technical problems, the purpose of this utility model is to provide a light-weight flame-retardant polyvinyl chloride insulated and sheathed power cable, which has a reasonable structural design and effectively improves the fire-resistant and flame-resistant performance, extrusion resistance and The compact structure reduces the weight of the cable.

The technical scheme of the utility model is as follows:

Lightweight flame-retardant polyvinyl chloride insulated and sheathed power cable, including three large conductors and small conductors, is characterized in that: the three large conductors and small conductors are respectively wrapped with a fire-resistant layer, and the fire-resistant layer is made of double-layer high-temperature-resistant polycarbonate. It is formed by overlapping wrapping after the ester tape, and the covering rate of the wrapping is not less than 35%. The refractory layer is wrapped with an insulating layer. After wrapping the insulating layer, the finished three large conductors are distributed on the outside of the small conductors. The small conductor and the three large conductors The insulating layer is provided with three-lobed buffer pads distributed in the form of finished products to form the cable core together. The buffer pad is extruded from thermoplastic elastomer. There are through holes in the buffer pad. .

The light-weight flame-retardant polyvinyl chloride insulated and sheathed power cable is characterized in that: the insulating layer and the sheath layer are made of flame-retardant polyvinyl chloride.

The light-weight flame-retardant polyvinyl chloride insulated and sheathed power cable is characterized in that: the wrapping layer is made of overlapping wrapping of artificial synthetic mica tapes, and the covering rate of the wrapping is not less than 48%.

The utility model has the advantages of:

The utility model has a reasonable structural design, is provided with a fire-resistant layer and a high-temperature-resistant wrapping layer, effectively improves the flame-retardant performance and fire-resistant performance of the cable, and wins precious time for rescuers in a fire environment. In addition, the cable is also It has good anti-extrusion performance and compact structure, small dead weight, and is easy to install and lay.

Description of drawings:

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

Detailed ways:

See Figure 1:

Lightweight flame-retardant PVC insulated and sheathed power cable, including three large conductors 1 and small conductors 2, the three large conductors 1 and small conductors 2 are respectively wrapped with a fire-resistant layer 3, and the fire-resistant layer 3 is made of double-layer high-temperature resistant polyester It is composed of overlapping wrapping after tape, and the covering rate of wrapping is not less than 35%. The refractory layer 3 is wrapped with an insulating layer 4. After wrapping the insulating layer 4, the finished three large conductors 1 are distributed on the outside of the small conductor 2, and the small conductor 2 Between the insulation layer 5 of the three large conductors 1, there is a buffer pad 5 distributed in the shape of a three-lobed finished product to form a cable core. The self-weight of the cable is reduced, and the cable core is wrapped with a wrapping layer 7 and a sheath layer 8 in sequence.

The insulation layer 4 and the sheath layer 8 are made of flame-retardant polyvinyl chloride.

The wrapping layer 7 is composed of artificial synthetic mica tapes overlapping wrapping, and the wrapping coverage rate is not less than 48%.

Claims (3)

1. A lightweight flame-retardant polyvinyl chloride insulated and sheathed power cable, comprising three large conductors and small conductors, characterized in that: the three large conductors and the small conductors are respectively wrapped with a refractory layer, and the refractory layer adopts double Layers of high-temperature-resistant polyester tape are overlapped and wrapped, and the covering rate of the wrap is not less than 35%. The refractory layer is wrapped with an insulating layer. After wrapping the insulating layer, the finished three large conductors are distributed on the outside of the small conductor. The small conductor and The insulating layer of the three large conductors is provided with a three-lobed buffer pad distributed in the shape of a finished product to form a cable core. The buffer pad is extruded from a thermoplastic elastomer. There are through holes in the buffer pad, and the cable core is wrapped with wrapping layers in turn , Sheath layer. 2. The lightweight flame-retardant polyvinyl chloride insulated and sheathed power cable according to claim 1, characterized in that: the insulating layer and the sheath layer are made of flame-retardant polyvinyl chloride. 3. The light flame-retardant polyvinyl chloride insulated and sheathed power cable according to claim 1, characterized in that: the wrapping layer is made of artificially synthesized mica tape overlapping wrapping, and the lapping rate of the wrapping is not less than 48%.

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