CN205943517U

CN205943517U - Fire -resistant power cable of improved generation middling pressure

Info

Publication number: CN205943517U
Application number: CN201620671852.8U
Authority: CN
Inventors: 杨洪新; 高宇; 王佳伟; 王军
Original assignee: Jiangsu Hongfeng Cable Group Co Ltd
Current assignee: Jiangsu Hongfeng Cable Group Co Ltd
Priority date: 2016-06-30
Filing date: 2016-06-30
Publication date: 2017-02-08
Anticipated expiration: 2026-06-30

Abstract

The utility model discloses a fire -resistant power cable of improved generation middling pressure, including the cable core, its characterized in that: the cable core form by the transposition of a plurality of insulation core, the inorganic hydration filling layer of extrusion is located in the clearance of cable core, and the cable core is the crowded steamed fire -retardant glass fiber tape of cigarette of hanging down of first nothing that wraps outward, and the steamed low fire -retardant glass fiber tape of cigarette of first nothing winds package pottery vitrification silicon rubber separation sleeve outward, and the package second is crowded outward again to pottery vitrification silicon rubber separation sleeve does not have the steamed fire -retardant glass fiber tape of cigarette of hanging down, and the second does not have the steamed fire -retardant glass fiber tape of cigarette of hanging down and weaves the galvanized steel strip armor outward, and the outmost crowded package of cable does not have steamed low fire -retardant oversheath of cigarette or aluminium sheath. The utility model discloses can satisfy the requirement of electrical property and fire resistance simultaneously, the structure is more reasonable, manufacturing process simple, reasonable price, long service life, the fire -resistant power cable of middling pressure crosslinked polyethylene that the security performance is high, mainly is applied to the building that needs the fire prevention in the city, public place etc..

Description

Fireproof power cable is pressed in a kind of modified model

Technical field

The utility model relates to field of cables, specifically refer to press fireproof power cable in a kind of modified model.

Background technology

Existing fire-resisting cable technology is widely applied on low-voltage cable, and electric pressure is 1kV and following, and the construction of cable is to adopt Realize the function of fire resisting with fire-resistant isinglass belt, product is mainly used in city needs fireproof building, public place etc., from joining Electronic box or transformator deliver the power to each power unit.

Development with skyscraper and the raising of fire-protection rating, and the reinforcement of people's safety consciousness, some buildings need With fire-resisting cable, higher voltage is transported to building top.Because voltage is higher, traditional mica tape fire-resisting cable structure is no Method meets the design requirement of electric field in cable, is completely unsuitable for.Only design with the completely different knot of traditional fire-resisting cable Structure could meet the requirement of electrical property and fire resistance simultaneously.

Utility model content

Technical problem to be solved in the utility model be provide one kind to have more reasonable structure, manufacturing process be simple, valency Fireproof power cable is pressed in the modified model that lattice are reasonable, long service life, security performance are high.

Fireproof power cable is pressed, including cable core, described cable core is by some in a kind of modified model described in the utility model Root insulated wire cores are stranded to be formed；The gap location of described cable core extrudes inorganic hydration packed layer, and extruding thickness outside cable core is 0.1- The first LSOH anti-flaming glass fibre belt of 0.2mm, the outer wrapped thickness of the first LSOH anti-flaming glass fibre belt is the ceramic of 1-2mm Silicone rubber separation sleeve, extrudes the second LSOH anti-flaming glass that thickness is 0.1-0.2mm again outside Ceramic silicon rubber separation sleeve Band, outside the second LSOH anti-flaming glass fibre belt, braiding thickness is the galvanized steel strip armor of 1-2cm, and cable outermost layer extrudes thickness LSOH anti-flaming oversheath for 2-4mm or thickness are the aluminium sheath of 1-2mm.

Improve further, described insulated wire cores are extruded in outside copper conductor successively by copper conductor, using three-layer co-extruded mode Thickness is first semiconductive shielding layer of 2-3mm, thickness is the crosslinked polyetylene insulated layer of 4-5mm, thickness is the second of 3-5mm Semiconductive shielding layer and the copper strips metal screen layer that wrapped thickness outside the second semiconductive shielding layer is 2-4mm are constituted.

The beneficial effects of the utility model are：

1st, compared with prior art, this fire-resisting cable electric pressure is higher, completely dispenses with fire-resistant isinglass belt, the construction of cable Simply, selected material is easy to get, easy to process, and environment is not polluted.

2nd, the inorganic hydration filling of extruding, can discharge a large amount of water when meeting fire, and form non-burn-through mineral-filled layer, Core is preferably protected not to be burned.

3rd, aluminium sheath will not burn, even if any harmful gass also will not be produced under flame condition, the fusing point of aluminum is 660 DEG C, generally it is difficult to fusing, also only when aluminum pipe is melted, crosslinked polyethylene could burn with air contact；Even if Crosslinked polyethylene burns, and only produces carbon dioxide and water, does not have any harmful substance to produce.

Brief description

Fig. 1 is this utility model structural representation.

Specific embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings：

As shown in figure 1, pressing fireproof power cable in a kind of modified model described in the utility model, including cable core, described Cable core is formed by some insulated wire cores are stranded；Described insulated wire cores are extruded successively by copper conductor 1, using three-layer co-extruded mode The outer thickness of copper conductor be first semiconductive shielding layer 2 of 2-3mm, thickness be the crosslinked polyetylene insulated layer 3 of 4-5mm, thickness The second semiconductive shielding layer 4 for 3-5mm and wrapped thickness outside the second semiconductive shielding layer are the copper strips metal of 2-4mm Screen layer 5 is constituted.

Then in the gap location extruding inorganic hydration packed layer 6 of cable core, outside cable core, extrude thickness for 0.1-0.2mm first LSOH anti-flaming glass fibre belt 7, the outer wrapped thickness of the first LSOH anti-flaming glass fibre belt is the Ceramic silicon rubber isolation of 1-2mm Set 8, extrudes the second LSOH anti-flaming glass fibre belt 9 that thickness is 0.1-0.2mm, second no again outside Ceramic silicon rubber separation sleeve Outside halogen low-smoke and flame retardant glass fibre belt, braiding thickness is the galvanized steel strip armor 10 of 1-2cm, and it is 2-4mm that cable outermost layer extrudes thickness LSOH anti-flaming oversheath 11 or thickness be 1-2mm aluminium sheath 11.

So that the fire resistance of cable is more preferably, cable outermost layer extrudes the aluminium sheath 11 that thickness is 1-2mm, and aluminium sheath is not Can burn, even if any harmful gass also will not be produced under flame condition, the fusing point of aluminum is 660 DEG C, is generally difficult to Fusing, also only when aluminum pipe is melted, crosslinked polyethylene could burn with air contact；Even if crosslinked polyethylene burns, only Produce carbon dioxide and water, do not have any harmful substance to produce.

This utility model could meet electrical property and fire resistance with the completely different structure of traditional fire-resisting cable simultaneously Requirement, the middle pressure crosslinked polyethylene that more reasonable structure, manufacturing process are simple, reasonable price, long service life, security performance are high Fireproof power cable, is mainly used in city and needs fireproof building, public place etc..

The above is only preferred implementation of the present utility model it is noted that common skill for the art For art personnel, on the premise of without departing from this utility model principle, some improvement can also be made, these improvement also should be regarded as Protection domain of the present utility model.

Claims

1. in a kind of modified model press fireproof power cable, including cable core it is characterised in that：Described cable core is by some covered wires Core is stranded to be formed；The gap location of described cable core extrudes inorganic hydration packed layer, extrudes thickness for 0.1-0.2mm first outside cable core LSOH anti-flaming glass fibre belt, the outer wrapped thickness of the first LSOH anti-flaming glass fibre belt is the Ceramic silicon rubber isolation of 1-2mm Set, extrudes the second LSOH anti-flaming glass fibre belt that thickness is 0.1-0.2mm, the second Halogen again outside Ceramic silicon rubber separation sleeve Outside low-smoke and flame retardant glass fibre belt, braiding thickness is the galvanized steel strip armor of 1-2cm, and cable outermost layer extrudes the nothing that thickness is 2-4mm Halogen low-smoke and flame retardant oversheath or thickness are the aluminium sheath of 1-2mm.

2. press fireproof power cable in modified model according to claim 1 it is characterised in that described insulated wire cores are by copper Conductor, be extruded in successively using three-layer co-extruded mode the outer thickness of copper conductor be first semiconductive shielding layer of 2-3mm, thickness be 4- The crosslinked polyetylene insulated layer of 5mm, thickness be 3-5mm the second semiconductive shielding layer and wrapped in the second semiconductive shielding layer Outer thickness is that the copper strips metal screen layer of 2-4mm is constituted.