CN202473347U

CN202473347U - Guide cable

Info

Publication number: CN202473347U
Application number: CN2012201190404U
Authority: CN
Inventors: 马金龙; 汤永怀
Original assignee: ANHUI TIANLONG ELECTRIC CABLE GROUP Co Ltd
Current assignee: ANHUI TIANLONG ELECTRIC CABLE GROUP Co Ltd
Priority date: 2012-03-27
Filing date: 2012-03-27
Publication date: 2012-10-03
Anticipated expiration: 2022-03-27

Abstract

The utility model discloses a guide cable. The guide cable is characterized in that a conductor is provided with a soft copper wire, a plastic insulated layer is extruded on the conductor to form insulated wire cores, each two insulated wire cores are stranded to from a stranded-pair group, a polyester tape is lapped on each stranded-pair group in an overlap manner to form a unit stranded-pair group, the unit stranded-pair groups and a water-stop filling rope jointly form a cable core in such an arrangement manner that one unit stranded-pair group serves as a center and the other unit stranded-pair groups are evenly distributed on the periphery, a water-stop tape layer and a copper tape layer are sequentially lapped on the outer layer of the cable core, a flow guide wire is arranged between the water-stop tape layer and the copper tape layer, polyvinyl plastics are extruded to form an inner protective layer and an outer protective layer, galvanized steel wires are braided to form an armor layer, and the inner protective layer, the armor layer, the outer protective layer and a semi-conductive layer are sequentially arranged on the outer layer of the copper tape layer. The guide cable can transmit power-frequency, audio-frequency and high-frequency signals in a long distance, and has excellent performances such as electromagnetic interference resistance, water stop, humidity resistance, flame resistance, bend resistance, mechanical shock resistance and long serve life.

Description

Guide cable

Technical field

The utility model relates to a kind of guide cable, more specifically says so to be applied in the guide cable of conduction induced voltage in the high pressure electric line.

Background technology

In high voltage power transmission and transforming system, city electric substation or apart from hinge electric substation in the very near supply line; Control cable with the vertical poor relay protection circuit of high voltage power cable configured in parallel; Under system short-circuit, produce high longitudinal induced voltage; Cause protective device tripping or misoperation, and problem such as cable insulation puncture.The vertical poor the means of relay protection of therefore, seeking a kind of excellent performance becomes the key that ensures the normal operation of electric power system.Control cable voltage withstand class relevant in the prior art is low, and it is also lower to be merely a.c3kV, insulation resistance, in the time of 20 ℃≤and 10M Ω km; And it is bigger to decay, and can not satisfy the requirement of high-frequency signal transmission.

Summary of the invention

The utility model is for avoiding above-mentioned existing in prior technology weak point; The long Distance Transmission power frequency of a kind of ability, audio frequency and high-frequency signal are provided; Anti-electromagnetic interference, block water, moistureproof, fire-retardant, anti-bending, anti-mechanical shock, and the guide cable of long service life.

The utility model technical solution problem adopts following technical scheme:

The design feature of the utility model guide cable is that conductor adopts the soft copper lead, on said conductor, extrudes plastic insulating layer and constitutes insulated wire cores; Per two insulated cores are twisted into the pair twist group; The overlapping polyester belt that is surrounded with constitutes unit pair twist group on said pair twist group; Said unit pair twist group be with one group be the center, equally distributed spread pattern constitutes cable core jointly with the gasket for packing that blocks water in the periphery for other each group; At wrapped successively formation water blocking tape layer of the skin of said cable core and copper strips layer, between said water blocking tape layer and copper strips layer, drainage thread is set; The armour that set gradually the sheath that extrudes vinyon and form at the skin of said copper strips layer, forms by the zinc-coated wire braiding, extrude external sheath layer and semi-conductive layer that vinyon forms.

The design feature of the utility model guide cable also is:

Said plastic insulating layer is to be material with high density polyethylene (HDPE) or crosslinked polyethylene.

Said pair twist group twisting pitch is 100-120mm.

Sheath and external sheath layer are to adopt LLDPE plastics plastics to extrude to form.

Semi-conductive layer is to form through extruding the semiconductive plastics.

Compared with present technology, the utility model beneficial effect is embodied in:

1, the utlity model has excellent electric characteristics, high-frequency transmission characteristic and mechanical and physical performance, have excellent anti-external electromagnetic field, block water damp proof insulation and resisting environmental stress and cracking characteristic again, guaranteed that the cable long-time running is safe and reliable and stable;

2, insulating barrier adopts high density polyethylene (HDPE) or cross-linking polyethylene materials in the utility model, and this material has very high insulation resistance, has improved the insulation level of cable;

3, adopt the gasket for packing that blocks water in the utility model in the cable core, be based on this type cable laying in Urban Buried Pipeline Network, steam or under water is often arranged, the useful life and the fail safe that have improved cable;

4, sheath and external sheath layer adopt LLDPE plastics plastics in the utility model, have improved cable resisting environmental stress and cracking characteristic, have favorable waterproof property;

5, the outermost semi-conductive layer employing of the utility model cable semiconductive plastics extrude and form, and have uniformity and stability than graphitization, have improved the operating characteristic of cable.

Description of drawings

Fig. 1 is seven groups of pair of twisted cores structural representations for the utility model.

Label among the figure: 1 conductor; 2 insulating barriers; 3 pair twist groups; 4 unit pair twist groups; 5 gasket for packings; 6 water blocking tape layers; 7 drainage threads; 8 copper strips layers; 9 sheaths; 10 armours; 11 external sheath layers; 12 semi-conductive layers.

Embodiment

Referring to Fig. 1, present embodiment is seven groups of guide cables, and its conductor 1 adopts the soft copper lead, on conductor 1, extrudes plastic insulating layer 2 and constitutes insulated wire cores; Per two insulated cores are twisted into pair twist group 3; The overlapping polyester belt that is surrounded with constitutes unit pair twist group 4 on pair twist group 3; To be that equally distributed spread pattern and the gasket for packing 5 of blocking water are common in the periphery center, other six groups with one group constitute cable cores to unit pair twist group 4; At the wrapped successively formation water blocking tape layer 6 copper strips layers 8 of the skin of cable core, between water blocking tape layer 6 and copper strips layer 8, drainage thread 7 is set; The armour 10 that set gradually the sheath 9 that extrudes vinyon and form at the skin of copper strips layer 8, forms by the zinc-coated wire braiding, extrude external sheath layer 11 and semi-conductive layer 12 that vinyon forms.

In the practical implementation, plastic insulating layer 2 is to be material with high density polyethylene (HDPE) or crosslinked polyethylene; Pair twist group 3 twisting pitch are 100-120mm; Sheath 9 is to adopt LLDPE plastics plastics to extrude to form with external sheath layer 11; Semi-conductive layer 12 is to form through extruding the semiconductive plastics.

Claims

1. a guide cable is characterized in that conductor (1) adopts the soft copper lead, on said conductor (1), extrudes plastic insulating layer (2) and constitutes insulated wire cores; Per two insulated cores are twisted into pair twist group (3); Go up the overlapping polyester belt that is surrounded with in said pair twist group (3) and constitute unit pair twist group (4); Said unit pair twist group (4) be with one group be the center, equally distributed spread pattern constitutes cable core jointly with the gasket for packing (5) that blocks water in the periphery for other each group; At wrapped successively formation water blocking tape layer of the skin of said cable core (6) and copper strips layer (8), between said water blocking tape layer (6) and copper strips layer (8), drainage thread (7) is set; The armour (10) that set gradually the sheath (9) that extrudes vinyon and form at the skin of said copper strips layer (8), forms by the zinc-coated wire braiding, extrude external sheath layer (11) and semi-conductive layer (12) that vinyon forms.

2. guide cable according to claim 1 is characterized in that said plastic insulating layer (2) is is material with high density polyethylene (HDPE) or crosslinked polyethylene.

3. guide cable according to claim 1 is characterized in that said pair twist group (3) twisting pitch is 100-120mm.

4. guide cable according to claim 1 is characterized in that said sheath (9) and external sheath layer (11) are to adopt LLDPE plastics plastics to extrude to form.

5. guide cable according to claim 1 is characterized in that said semi-conductive layer (12) is to form through extruding the semiconductive plastics.