CN202855420U

CN202855420U - Medium-voltage flame-retardant power cable

Info

Publication number: CN202855420U
Application number: CN 201220454145
Authority: CN
Inventors: 赵英荣; 孙磊; 戴凌云
Original assignee: Jiangsu Dongfeng Cable Co Ltd
Current assignee: Jiangsu Dongfeng Cable Co Ltd
Priority date: 2012-09-07
Filing date: 2012-09-07
Publication date: 2013-04-03
Anticipated expiration: 2022-09-07

Abstract

The utility model discloses an 8.7/15kV medium-voltage flame-retardant power cable, which comprises a cable core. A plurality of insulated wire cores are inter-twisted to form the cable core. Each insulated wire core is composed of a conductor, a conductor shielding layer, a cross-linked polyethylene insulated layer, a semi-conductive insulation shielding layer and a copper-strap metal shielding layer, wherein the conductor shielding layer, the cross-linked polyethylene insulated layer, the semi-conductive insulation shielding layer and the copper-strap metal shielding layer are sequentially coated outside the conductor. Inorganic water and fillings are extruded to be arranged inside the cable core. A first flame-retardant layer, a ceramic silicone rubber isolation layer, a second flame-retardant layer and a steel belt armored layer are sequentially wrapped outside the cable core. A halogen-free low-smoke flame-retardant outer sheath is extruded at the outermost layer of the power cable. The medium-voltage flame-retardant power cable has the advantages of simple manufacturing process, reasonable price, long service life, high safety performance and the like.

Description

A kind of middle pressure fireproof power cable

Technical field

The utility model relates to the electric wire field, specifically refers to a kind of middle pressure fireproof power cable.

Background technology

Existing fire-resisting cable technology is widely applied at low-voltage cable, electric pressure is 1kV and following, the construction of cable is for adopting fire-resistant isinglass belt to realize fire-resistant function, product is mainly used in needs fireproof building, public place etc. in the city, from distribution box or transformer with power delivery to each power unit.

Along with the development of skyscraper and the raising of fire-protection rating, and the reinforcement of people's awareness of safety, some building need to be transported to the top, building with the voltage of 15kV with the fire-resisting cable of 15kV.15kV voltage is higher, and traditional mica tape fire-resisting cable structure can't satisfy the designing requirement of electric field in the cable, is not suitable for fully, so only design the requirement that could satisfy simultaneously electrical property and fire resistance with the complete different structure of traditional fire-resisting cable.

The utility model content

Press fireproof power cable among the 8.7/15kV that the technical problems to be solved in the utility model provides that a kind of manufacturing process is simple, reasonable price, long service life, security performance are high.

A kind of middle pressure fireproof power cable described in the utility model comprises cable core, and its cable core is to form by several insulated wire cores are stranded; The inorganic water of extruding and filling extrude the first flame-retardant layer, separator, the second flame-retardant layer, armour successively outside cable core in cable core, and outermost layer extrudes oversheath.

Described insulated wire cores is by conductor and is coated on successively conductor outer conductor shield, insulation, insulation screen, metal screen layer and consists of.

The beneficial effects of the utility model are:

Compared with prior art, higher grade of the utility model voltage cable, and fully without fire-resistant isinglass belt, the construction of cable is simple, and selected material is easy to get, and is easy to process, and environment is not polluted; The inorganic hydration of extruding is filled, and can discharge large water gaging when meeting fire, and forms non-burn-through mineral-filled layer.The ceramic silicon rubber of extruding is met the shell that can form the non-burn-through ceramic of one deck after fire burns.

Description of drawings

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

Embodiment:

As shown in Figure 1, a kind of middle pressure fireproof power cable described in the utility model comprises cable core, and its cable core is to form by several insulated wire cores are stranded; Described insulated wire cores is by conductor 1 and is coated on successively the outer conductor shield 2 of conductor 1, crosslinked polyetylene insulated 3, semiconductive insulation screen 4, copper strips metal screen layer 5 and consists of; The inorganic water of extruding and filling 6 extrude the first flame-retardant layer 7, ceramic silicon rubber separator 8, the second flame-retardant layer 9, steel-tape armouring layer 10 successively outside cable core in cable core, and outermost layer extrudes LSOH anti-flaming oversheath 11.

The utility model provides a kind of middle pressure fireproof power cable version and implementation method; the above only is preferred implementation method of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement, these improvement also should be considered as protection range of the present utility model.

Claims

1. press fireproof power cable in one kind, it is characterized in that: comprise cable core, its cable core is to form by several insulated wire cores are stranded; The inorganic water of extruding and filling (6) extrude the first flame-retardant layer (7), separator (8), the second flame-retardant layer (9), armour (10) successively outside cable core in cable core, and outermost layer extrudes oversheath (11).

2. middle pressure fireproof power cable according to claim 1 is characterized in that: described insulated wire cores is by conductor (1) and is coated on successively the outer conductor shield (2) of conductor (1), insulation (3), insulation screen (4), metal screen layer (5) and consists of.