CN104966581A

CN104966581A - Lead sheath copper wire shielding composite high-voltage power cable

Info

Publication number: CN104966581A
Application number: CN201510310907.2A
Authority: CN
Inventors: 张卫忠; 史波
Original assignee: Wuxi Shuguang Cable Co Ltd
Current assignee: Wuxi Shuguang Cable Co Ltd
Priority date: 2015-06-09
Filing date: 2015-06-09
Publication date: 2015-10-07

Abstract

The invention discloses a lead sheath copper wire shielding composite high-voltage power cable. The lead sheath copper wire shielding composite high-voltage power cable includes a conductor, the conductor and a semiconductive belting, a conductor shielding layer, an insulating layer and an insulation shielding layer which adopt a four-layer structure form an insulating wire core, the insulating wire core is wrapped by a semicondcutive buffer strip of a thickness of 0.5mm, a copper wire shielding tape is woven outside the semiconductive buffer strip and is wrapped by a semiconductive buffer water-blocking tape, then a lead sheath is extruded outside the semiconductive buffer water-blocking tape, finally an outer sheath is extruded, and a surface of the outer sheath is coated with a graphite layer. Starting from cost saving and environmental pollution, the invention designs the lead sheath copper wire shielding composite high-voltage power cable under the condition of satisfying extra-high-voltage cable laying environment, effectively solves the problem that the shielding layer bears the function of single-phase fault short-circuit current, and can also bear tensile force that needs bearing in vertical laying, and the biggest advantage is that in a production process, a risk of burning a main insulating wire core does not exist, thereby guaranteeing product quality and service life.

Description

A kind of lead sheath brass wire shielding composite high-voltage power cable

Technical field

The present invention relates to and join field of cable technology, particularly relate to a kind of lead sheath brass wire shielding composite high-voltage power cable.

Background technology

Now, China 110KV, 220KV extra-high-tension cable is widely used in electric power system.The use of extra-high-tension cable has multiple environment to lay, for different environment, it is also different to the requirement of cable, the normally wrapped waterstop of extra-high-tension cable of current manufacture is as longitudinal waterproof, weld or extrude aluminium nested structure as radial waterproof, such product can meet waterproof requirement, but the area that in its soil or water, salt concentration is higher in some local environment just can not be suitable for such product.Simultaneously because its aluminium sheath is easily caused moisture content to enter in cable by salt corrosion, water tree can be produced during cable long-time running and make cable easily puncture the useful life affecting cable.

Simultaneously because corrugated aluminum sheath adopts welding or exceed a lot when extruding because temperature is more plumbous, sustain damage as controlled the improper insulated wire cores that easily causes, there is product defects in potential, reduce properties of product, and the fusing point of lead sheath is more much lower than aluminium, clearly greatly reduce the risk of Damage to insulation core.

Lead sheathed cable is due to the flexibility of lead, embossing operation is carried out without the need to resembling aluminium sheath, have the external diameter of cable and greatly reduced, can add according to design requirement the requirement that many copper wires meet single-phase fault short circuit current in lead sheath simultaneously, also can bear the certain pulling force of vertical direction.

Summary of the invention

The present invention, in order to solve the problem of prior art, provides a kind of lead sheath brass wire shielding composite high-voltage power cable, solves the effect that screen bears single-phase fault short circuit current, and also can bear the pulling force problem of bearing required for vertical run.

A kind of lead sheath brass wire shielding composite high-voltage power cable of the present invention, cable comprises conductor, semiconductive band, conductor shield, insulating barrier, insulation screen, Semi-conductive buffer band, brass wire shielding band, semi-conductive buffer water-blocking band, lead sheath, outer jacket from inside to outside successively; The semiconductive band of described conductor and employing four layers of coextruded structure, conductor shield, insulating barrier, insulation screen form insulated wire cores, at the Semi-conductive buffer band of the wrapped 0.5mm thickness of insulated wire cores, brass wire shielding band is woven outward at Semi-conductive buffer band, at the outer wrapped semi-conductive buffer water-blocking band of brass wire shielding band, lead sheath is extruded again outside semi-conductive buffer water-blocking band, finally extruding oversheath, in the surface application graphite linings of oversheath.

Further improvement, described brass wire shielding band adopts layer to twist by many copper wires and forms.

Further improvement, the thickness proportion of described semiconductive band, conductor shield, insulating barrier and insulation screen is 1/2:1/2:1:1/4, and wherein thickness of insulating layer is for being not less than 16.0mm.

Compared with prior art, beneficial effect of the present invention is:

1, from cost-saving and environmental pollution angle, design under meeting extra-high-tension cable to lay the condition of environment and simple and efficiently solve the effect that screen bears single-phase fault short circuit current, and also can bear the pulling force problem of bearing required for vertical run, larger advantage can not produce the risk of scalding to main insulation core in production process, ensure that product quality and useful life;

2, design for high-tension cable needed for laying with salt environment, because the fusing point of lead is extremely low, requirement for the single-phase fault short circuit current needed for circuit need increase several copper wire to meet the requirement of short circuit current, and this increases by one brass wire shielding structure to the buffer water-blocking band skin coated in insulated wire cores makes it achieve the goal;

3, the thickness proportion adopting the semiconductive band of four layers of coextruded structure, conductor shield, insulating barrier and insulation screen is 1/2:1/2:1:1/4, the performances such as the sealing of cable, rounding property is improved greatly, also saves cost simultaneously.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Embodiment

A kind of lead sheath brass wire shielding composite high-voltage power cable as shown in Figure 1, its cable comprises conductor 1, semiconductive band 2, conductor shield 3, insulating barrier 4, insulation screen 5, Semi-conductive buffer band 6, brass wire shielding band 7, semi-conductive buffer water-blocking band 8, lead sheath 9, outer jacket 10 from inside to outside successively; The semiconductive band 2 of described conductor 1 and employing four layers of coextruded structure, conductor shield 3, insulating barrier 4, insulation screen 5 form insulated wire cores; The thickness proportion of described semiconductive band 2, conductor shield 3, insulating barrier 4 and insulation screen 5 is 1/2:1/2:1:1/4, and wherein thickness of insulating layer is 16.0mm; At the Semi-conductive buffer band 6 of the wrapped 0.5mm thickness of insulated wire cores, at Semi-conductive buffer band 6 outer braiding brass wire shielding band 7, at the outer wrapped semi-conductive buffer water-blocking band 8 of brass wire shielding band 7, lead sheath 9 is extruded again outside semi-conductive buffer water-blocking band 8, finally extruding oversheath 10, in the surface application graphite linings 11 of oversheath 10.

Embody rule approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvement, these improvement also should be considered as protection scope of the present invention.

Claims

1. a lead sheath brass wire shielding composite high-voltage power cable, is characterized in that: cable comprises conductor (1), semiconductive band (2), conductor shield (3), insulating barrier (4), insulation screen (5), Semi-conductive buffer band (6), brass wire shielding band (7), semi-conductive buffer water-blocking band (8), lead sheath (9), outer jacket (10) from inside to outside successively; The semiconductive band (2) of described conductor (1) and employing four layers of coextruded structure, conductor shield (3), insulating barrier (4), insulation screen (5) form insulated wire cores, at the Semi-conductive buffer band (6) of the wrapped 0.5mm thickness of insulated wire cores, brass wire shielding band (7) is woven outward at Semi-conductive buffer band (6), at brass wire shielding band (7) wrapped semi-conductive buffer water-blocking band (8) outward, lead sheath (9) is extruded again outside semi-conductive buffer water-blocking band (8), finally extruding oversheath (10), in the surface application graphite linings (11) of oversheath.

2. lead sheath brass wire shielding composite high-voltage power cable according to claim 1, is characterized in that: described brass wire shielding band (7) adopts annular to form squeezing by many copper wires.

3. lead sheath brass wire shielding composite high-voltage power cable according to claim 1, it is characterized in that: the thickness proportion of described semiconductive band (2), conductor shield (3), insulating barrier (4) and insulation screen (5) is 1/2:1/2:1:1/4, and wherein insulating barrier (4) thickness is for being not less than 16.0mm.