CN2645181Y - Masking type fire resistant antiseptic flame-proof cable - Google Patents

Abstract

The utility model relates to a cable, especially a shielded high-temperature-resistant, anti-corrosion, flame-retardant power cable or control cable that can work in high and low temperature environments for a long time and can effectively prevent chemical reagents from corroding; the wire core is metal-plated Soft copper conductor made of fine wire twisted, the insulating layer is made of fusible polytetrafluoroethylene or polyperfluoroethylene propylene material, with low-smoke, halogen-free and dust-free properties between the insulating layer and the oxygen barrier layer The filler of rock wool rope material, the oxygen barrier layer is flame-retardant non-woven fabric or halogen-free flame-retardant oxygen barrier tape, the shielding layer is braided by tinned copper wire, the isolation layer is polyester heat-resistant isolation layer, the outermost The outer sheath is a fluoroplastic non-metallic outer sheath or a silicone rubber outer sheath; it has the outstanding advantages of high temperature resistance, severe cold resistance, chemical solvent corrosion resistance, good crack resistance, and high flame retardancy.

Description

A shielded high temperature resistant anti-corrosion flame retardant cable

technical field

The utility model relates to a cable, in particular to a power cable or a control cable which can work for a long time in a high and low temperature environment and can effectively prevent chemical reagents from corroding.

Background technique

At present, wires and cables are mainly cables and control cables produced according to national standards GB12706 and GB9330. Most of the insulating materials are cross-linked vinyl, polyvinyl chloride or other polyolefin mixtures. The long-term working environment temperature of the products should not exceed 90 ℃. In order to meet the requirements of power cables suitable for high-temperature environments, some manufacturers have adopted a polytetrafluoroethylene film-wrapped insulation structure. However, the wrapping sintering process of this structure is very complicated, there is no corresponding perfect quality inspection means, the product quality is not easy to control, and the bending performance of the cable is not ideal. The long-term working temperature of this cable cannot exceed 260 °C.

Contents of the invention

The purpose of the invention of the utility model is to improve a shielded high-temperature-resistant anti-corrosion flame-retardant cable with high temperature resistance, severe cold resistance, strong chemical corrosion resistance, crack resistance and good flame retardancy.

The purpose of the invention of the utility model is achieved by implementing the following technical solutions:

Shielded high temperature resistant, anti-corrosion and flame-retardant cables include wire core, insulating layer, filler, oxygen barrier layer, shielding layer, isolation layer and outer sheath from inside to outside. A soft copper conductor made of twisted wires; each core is wrapped with an insulating layer, which is made of fusible polytetrafluoroethylene or polyfluoroethylene propylene material; The two cores are twisted together; between the insulating layer and the oxygen barrier layer is a filler of dust-free rock wool rope material with low-smoke and halogen-free characteristics; the oxygen barrier layer is flame-retardant non-woven fabric or halogen-free flame-retardant insulation Oxygen belt; the shielding layer outside the oxygen barrier layer is a tinned copper wire braiding layer; the insulating layer outside the shielding layer is a polyester heat-resistant insulating layer; the outer sheath is a fluoroplastic non-metallic outer sheath, or it can be a silicone rubber outer sheath Sheath.

Additional technical features are:

①The insulating layer wrapping the wire core is single layer or double layer;

②The outer sheath is a single-layer fluoroplastic non-metal outer sheath;

③The outer sheath is a single-layer or double-layer silicone rubber outer sheath;

The utility model has the following advantages:

1. Since the wire core is twisted with metal-coated filaments to form a toughened copper conductor, the conductor has no oxidation phenomenon at high temperature, which ensures the reliability of the continuous operation of the cable in a high temperature environment of 285°C or below;

2. Single-layer or double-layer fluoroplastic material is used as the insulation layer, and the insulation thickness is reduced by about 40% compared with cross-linked polyethylene insulation. In particular, the double insulation structure improves the insulation strength of the cable, reduces the dielectric loss of the cable, and improves The crack resistance of the product is improved. The high-temperature working temperature of the cable is increased by 25% compared with existing products;

3. Since the cable uses low-smoke and halogen-free materials as fillers and halogen-free flame-retardant materials as oxygen barrier layers, the flame-retardant performance of the cable is improved, the amount of smoke generated by the cable during combustion is reduced, and the environmental protection performance of the cable is improved. ;

4. Using single-layer or double-layer silicone rubber material as the outer sheath can improve the low-temperature resistance of the cable and meet the requirements of long-term use of the cable in a low-temperature environment of -60°C, and the cable has excellent low-temperature bending performance;

5. The shielding layer is braided with special tinned copper wire (the braiding density is greater than 80%, and the braiding angle is less than 45°), which enhances the electromagnetic shielding ability of the cable.

Description of drawings

Fig. 1 is the structural representation of the utility model used as a power cable

Fig. 2 is a structural schematic diagram of the utility model used as a control cable

Marks in the figure: 1 is the core, 2 is the insulating layer, 3 is the filler, 4 is the oxygen barrier layer, 5 is the shielding layer, 6 is the isolation layer, 7 is the outer sheath, and 8 is the filament with metal plating.

Detailed ways

Below in conjunction with Fig. 1 and Fig. 2 the utility model is further described.

The cable structure of the present utility model includes wire core 1, insulation layer 2, filler 3, oxygen barrier layer 4, shielding layer 5, isolation layer 6 and outer sheath layer 7 from inside to outside. The core 1 is a soft copper conductor twisted with metal-coated filaments; each core 1 is wrapped with an insulating layer 2, and the insulating layer 2 is made of fusible polytetrafluoroethylene or polyfluoroethylene propylene material; the insulating layer 2 can be a single layer or double layer; the multiple cores 1 wrapped around the insulating layer 2 are twisted into a circle; the filler 3 between the insulating layer 2 and the oxygen barrier layer 4 is Dust-free rock wool rope material with low-smoke and halogen-free characteristics; oxygen barrier layer 4 is flame-retardant non-woven fabric or halogen-free flame-retardant oxygen barrier tape; shielding layer 5 is braided by tinned copper wire; isolation layer 6 is poly Ester heat-resistant isolation layer; the outer sheath 7 can be a single-layer fluoroplastic non-metal outer sheath, or a single-layer or double-layer silicone rubber outer sheath.

The main place of use of the product: it can be laid indoors or in cable trenches, cable ducts, and cable trays, where the ambient temperature is -60-285°C, where there is a high requirement for the shielding layer or a fixed place that requires anti-chemical solvent corrosion. It can also be used for power connection of mobile electrical equipment.

Main use features: 1. As a power cable, its rated working voltage: 0.6/1kV, as a control cable, its rated working voltage: 450/750kV; 2. As a power cable, the maximum number of cores of the cable is ___ cores, used as For control cables, the maximum core number of the cable is 61 cores; 3. Long-term use temperature: -60～285°C; 4. The minimum bending radius of the cable is 6 times the diameter of the cable.

Claims (4)

1, a kind of shielding high-temperature resistant anti-corrosive flame retardant cable, include core (1), insulating barrier (2), filler (3), oxygen barrier layer (4), screen (5), separator (6) from the inside to the outside successively, reach outer jacket (7), it is characterized in that: core (1) is the stranded soft copper conductor that forms of filament (8) that the coat of metal is arranged; Each iron core (1) is outer all to be enclosed with insulating barrier (2), and this insulating barrier is to be made by Meltability polytetrafluorethyletubular or perfluoroethylene-propylene material; Being insulated layer (2) wrapped a plurality of core (1) twists together; It between insulating barrier (2) and oxygen barrier layer (4) filler (3) with dustless mineral wool rope material of low smoke and zero halogen characteristic; Oxygen barrier layer (4) is fire retardant nonwoven fabric or halogen-free flameproof oxygen barrier band; The screen (5) of oxygen barrier layer (4) outside is the tinned wird braid; The outer separator (6) of screen (5) is the resistant polyester thermal insulation layer; Outer jacket (7) is nonmetal outer jacket of fluoroplastics or silicon rubber outer jacket.

2, a kind of shield type high-temperature resistant anti-corrosive flame retardant cable according to claim 1, it is characterized in that: insulating barrier (2) is individual layer or bilayer;

3, a kind of shield type high-temperature resistant anti-corrosive flame retardant cable according to claim 1 is characterized in that: outer jacket (7) is the nonmetal outer jacket of fluoroplastics of individual layer;

4, a kind of shield type high-temperature resistant anti-corrosive flame retardant cable according to claim 1 is characterized in that: outer jacket (7) individual layer or silicon bi-layer rubber outer protection layer.

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