CN2674608Y - Medium-and high-voltage wire armoured power cable capable of preventing white ant - Google Patents

Abstract

The utility model relates to a medium and high voltage steel wire armored anti-termite power cable. It is composed of copper conductor, conductor shield, XLPE insulation, insulation shield, copper tape shield, and PP rope filler. A layer of isolation tape I and a layer of polyethylene lining sheath are wrapped in turn outside the cable core. A layer of galvanized steel wire is armored on the periphery of the polyethylene liner sheath, and soft high-viscosity asphalt is coated on the steel wire. A layer of isolation tape II is wrapped around the periphery of the asphalt, and a layer of low-smoke, zero-halogen, termite-proof medium-density polyethylene outer sheath is extruded on the periphery of the isolation tape II. The utility model ensures the electrical performance of the original cable. After the armored steel wire is coated with bitumen, the waterproof and corrosion resistance are greatly improved. The anti-termite polyethylene sheath can well prevent the erosion of termites and other insects, and improve the service life of the cable. Due to the use of low-smoke and halogen-free raw materials during combustion, it will not produce a lot of dense smoke and toxic gases.

Description

Medium and high voltage steel wire armored termite-proof power cables

Technical field

The utility model relates to a medium and high-voltage steel wire armored termite-proof power cable, which belongs to the technical field of electric wires and cables.

Background technique

At present, common XLPE insulated steel wire armored PVC sheathed power cables are generally used in known power systems. Such products have poor waterproof ability, steel wires are easy to corrode, and cannot withstand the due short-term overload current; The vinyl chloride sheath has poor corrosion resistance and is easily damaged by insects such as termites. If the sheath is bitten by insects, the electrical performance of the cable will deteriorate and the service life will be shortened. And once a fire breaks out, such burning cables will release a large amount of toxic gas and dense smoke containing halogen, which not only affects the normal operation of disaster relief work, but also directly threatens personal safety.

Contents of the invention

The purpose of this utility model is to provide a power cable with good electrical performance, strong waterproof performance, strong corrosion resistance, and can prevent the erosion of termites and other insects, improve the service life, and will not produce a lot of dense smoke and toxic gases when burning .

The technical scheme of the utility model is to wrap a layer of isolation belt I around the cable core and then extrude the polyethylene lining sheath, armor the galvanized steel wire on the periphery of the inner lining sheath, and coat the soft high-viscosity asphalt on the steel wire . Isolation belt II is surrounded by asphalt, and a layer of low-smoke, zero-halogen, termite-proof medium-density polyethylene outer sheath is extruded on the periphery of isolation belt II. The technology of the utility model can be widely used on power cables of various voltage levels from 6kV to 35kV.

The beneficial effect of the utility model is that a layer of asphalt is coated on the surface of the armored steel wire, which effectively improves the waterproof performance and corrosion resistance of the cable. And because of the use of low-smoke halogen-free anti-termite sheath, it can prevent the cable from being eroded by termites and other insects, ensure the electrical performance of the cable, improve the service life of the cable, and realize that it will not emit a large amount of gas when it is burned. The purpose of dense smoke and toxic gases containing halogen.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

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

In the figure 1. Copper conductor, 2. Conductor shielding, 3. XLPE insulation, 4. Insulation shielding

5. Copper tape shielding, 6. PP rope filler, 7. Cable core, 8. Isolation belt I, 9. Lining protection

Cover, 10, steel wire armor, 11, asphalt, 12, isolation tape II, 13, polyethylene outer sheath.

Detailed ways

In this embodiment, an 11kV power cable is taken as an example to illustrate its implementation.

In Fig. 1, the cable core 7 is composed of three copper conductors 1, conductor shield 2, cross-linked polyethylene insulation 3, insulation shield 4, copper tape shield 5 and PP rope filler 6. A layer of non-woven isolation tape 18 is wrapped around the cable core 7, and a layer of medium density polyethylene lining sheath 9 is tightly extruded on the periphery of the isolation belt 1, and galvanized steel wires are arranged side by side in the same order almost on the periphery of the inner lining sheath. One deck of steel wire armor 10 is installed without gaps, and one deck of non-woven isolation tape II12 is wrapped around the steel wire armor periphery. A layer of soft high-viscosity asphalt 11 is evenly coated on the inside and outside of the armored steel wire and between the gaps between the inner lining sheath and the isolation zone II. A layer of low-smoke, halogen-free and termite-proof medium-density polyethylene outer sheath 13 is extruded on the periphery of the isolation zone II.

Claims (1)

A medium and high voltage steel wire armored termite-resistant power cable, the cable core is composed of copper conductor, conductor shield, cross-linked polyethylene insulation, insulation shield, copper tape shield, and PP rope filler, and is wrapped in a layer outside the cable core in turn Isolation tape I and a layer of polyethylene liner sheath, a layer of galvanized steel wire is armored on the periphery of the inner liner sheath, and a layer of isolation tape II is wrapped around the periphery of the steel wire, which is characterized in that the polyethylene liner sheath and A layer of soft high-viscosity asphalt is uniformly coated on the inside and outside of the galvanized steel wire between the isolation zone II and between the gaps, and a layer of low-smoke, halogen-free and termite-proof medium-density polyethylene outer sheath is extruded on the periphery of the isolation zone II.

Images