CN201918206U

CN201918206U - High-voltage cable sheath

Info

Publication number: CN201918206U
Application number: CN2011200481785U
Authority: CN
Inventors: 郑浩; 赵影; 孙章栓; 赵占红; 程培斯
Original assignee: CHANGJIANG HI-TECH CABLE Co Ltd
Current assignee: CHANGJIANG HI-TECH CABLE Co Ltd
Priority date: 2011-02-25
Filing date: 2011-02-25
Publication date: 2011-08-03
Anticipated expiration: 2021-02-25

Abstract

Disclosed is a high-voltage cable sheath. An outer sheath is sleeved outside an inner sheath, the inner sheath is a polyethylene sheath or flame-retardant polyethylene sheath or high-electrical-property PVC (polyvinyl chloride) sheath or high-electrical-property flame-retardant PVC sheath, the outer sheath is a flame-retardant sheath or rat-proof and termite-proof sheath or waterproof sheath or low-smoke low-halogen sheath, and the color of the inner sheath is different from that of the outer sheath. In the high-voltage cable sheath, the inner sheath is the high-electrical-property PVC sheath or polyethylene sheath specified in existing national standards, and the outer sheath can be the sheath with corresponding performances according to use requirements. The high-voltage cable sheath can overcome shortages of existing high-voltage cable sheaths, can simultaneously have a plurality of performances, meets different requirements of user units, and can meet requirements of various environments according to needs of users.

Description

Sheath of hv cable

Technical field

The utility model relates to a kind of cable cover(ing), especially a kind of sheath of hv cable.

Background technology

Along with development of electric power industry; 110kV, 220kV and higher level high-tension cable have obtained using widely; the produce market demand increases year by year; sheath of hv cable plays important protective effect to the safety in operation of cable, and regulation high-tension cable sheath adopts high electrically PVC sheath or pe sheath in the existing national standard.

The PVC sheath can add flame retardant as required improving fire resistance, and can lay environment needs, and performances such as increase protection against rodents, termite-proof, antiultraviolet can not impact other performances, but have following shortcoming:

1, electrical insulation properties is relatively poor, punctures easily when the high-tension cable long period of soaking is in water;

2, the PVC material has water penetration, when the cable long period of soaking has a certain amount of moisture or moisture enters in water

Cable influences the safe handling of high-tension cable;

3, poor performance at low temperatures, when ambient temperature was lower than-20 ℃, sheath ftractureed easily;

4, have certain fire resistance but not high, needs add flame retardant and improve;

Discharge a large amount of poisonous hydrogen chloride gas when 5, burning, harm people's health.

Pe sheath has good electrical insulation properties, and water absorption is poor, and the cable long period of soaking can not in water yet

Insulation property are impacted; Possess favorable waterproof property, resistance to chemical corrosion and water resistance; Low temperature resistant, but have following shortcoming:

1, easy firing is difficult to extinguish after catching fire;

2, fillibility is poor, and sneaking into fire retardant, Ratproof agent etc. all influences bigger to its mechanical performance and electrical property.

Therefore, high-tension cable selects for use above-mentioned any sheath all to have shortcoming, and it is right to satisfy the cable applying unit

The various requirement of sheath of hv cable performance is such as possessing water resistance, protection against rodents, termite-proof, low-smoke low-halogen etc. simultaneously.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of sheath of hv cable, can solve the shortcoming of existing sheath of hv cable, can have multinomial performance simultaneously, satisfies the different needs of applying unit.

For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of sheath of hv cable, inner sheath are with oversheath outward;

Inner sheath is pe sheath or flame-proof polyethylene sheath or high electrically PVC sheath or high electrically flame-proof PVC sheath;

Oversheath is fire retardant jacket or the termite-proof sheath of protection against rodents or water-proof jacket or low-smoke low-halogen sheath.

The color of inner sheath is different with the color of oversheath.

The sheath of hv cable that the utility model provides, beneficial effect is as follows:

1, because inner sheath is with oversheath outward; Inner sheath is high electrically PVC sheath or the pe sheath of stipulating in the existing national standard, oversheath then can be selected sheath with respective performances according to user demand, can solve the shortcoming of existing sheath of hv cable, can have multinomial performance simultaneously, satisfy the different needs of applying unit, can adapt to various environmental requirements according to user's needs, for example select water-proof jacket to make cable possess favorable waterproof property, use fire retardant jacket to make cable possess superior fire resistance.

2, possess superior electrical insulation capability, guarantee cable under the situation of long period of soaking in water, electric property can not change.

3, the color of inner sheath is different with the color of oversheath, is convenient to distinguish the user, is beneficial to technology controlling and process.

4, oversheath is enclosed within outside the inner sheath, and construction is convenient in complementary adhesion.

Adopt the two procedures layering to make when 5, producing, only produce half of cable cover(ing) gross thickness at every turn thereby reduce

Technology difficulty, improved product quality, reduced product cost, improved the sheath overall performance, improved production efficiency.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples:

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

Embodiment

As shown in Figure 1, a kind of sheath of hv cable, the inner sheath 1 outer oversheath 2 that is with;

Inner sheath 1 is pe sheath or flame-proof polyethylene sheath or high electrically PVC sheath or high electrically flame-proof PVC sheath;

Oversheath 2 is fire retardant jacket or protection against rodents sheath or termite-proof sheath or water-proof jacket or low-smoke low-halogen sheath.

The color of inner sheath 1 is different with the color of oversheath 2.

Adopt the two procedures layering to make when producing the utility model, at first extrude inner sheath 1, extrude oversheath 2 again, only produce half of cable cover(ing) gross thickness thereby reduced technology difficulty at every turn, improved product quality.

Claims

1. a sheath of hv cable is characterized in that: the outer oversheath (2) that is with of inner sheath (1);

Inner sheath (1) is pe sheath or flame-proof polyethylene sheath or high electrically PVC sheath or high electrically flame-proof PVC sheath;

Oversheath (2) is fire retardant jacket or protection against rodents sheath or termite-proof sheath or water-proof jacket or low-smoke low-halogen sheath.

2. sheath of hv cable according to claim 1 is characterized in that: the color of inner sheath (1) is different with the color of oversheath (2).