CN209281910U

CN209281910U - A kind of aerial condutor with thin insulating

Info

Publication number: CN209281910U
Application number: CN201821889047.8U
Authority: CN
Inventors: 王国忠
Original assignee: JIANGSU LIGHT INTENSITY TO POWER LINES THROUGH TECHNOLOGY Co Ltd
Current assignee: JIANGSU LIGHT INTENSITY TO POWER LINES THROUGH TECHNOLOGY Co Ltd
Priority date: 2018-11-16
Filing date: 2018-11-16
Publication date: 2019-08-20
Anticipated expiration: 2028-11-16

Abstract

The utility model discloses a kind of aerial condutors with thin insulating, including aerial condutor core (1) and thin dielectric layer (2)；The thin dielectric layer (2) is coated on aerial condutor core (1) periphery, and the thin dielectric layer (2) is the weather-proof crosslinking or non-crosslinked polyvinyl chloride insulation, polyethylene insulation material with a thickness of 0.3-1.0mm.The center of aerial condutor core (1) is formed by one or more galvanized steel wire or aluminum-clad steel wire or aluminium alloy wire process, outer one or more layers aluminum steel of process or aluminium alloy wire according to a conventional method again.Wire center mainly undertakes stretching resistance effect, and the aluminum steel or aluminium alloy wire of outside assume responsibility for electric action and the effect of part stretching resistance.The conducting wire of the utility model is easy to construct, and does not generate corona, is not easy accumulated ice or accumulated snow.Diameter and the self weight of common aerial insulated cable are reduced using thin dielectric layer, tower load is small, and arc sag is small, wind load coefficient is small, with small vibration, and safety coefficient is higher, and it can effectively avoid rainwater or salt fog enter inside conducting wire, chemical attack will not occur for strands, thus the service life of extension lead.

Description

A kind of aerial condutor with thin insulating

Technical field

The utility model relates to a kind of transmission line of electricity, especially high pressure, ultrahigh voltage overhead wire, specially a kind of band is thin absolutely The aerial condutor of edge.

Background technique

Currently, well known aerial condutor has two classes: the first kind is the overhead stranded conductor of bare metal, is usually twisted with one heart by round wires It makes, centre is galvanized steel wire, aluminum-clad steel wire or high-strength aluminum alloy line, and outside is aluminum steel or high-strength aluminum alloy line Layering is successively twisted；Another kind of is the extruded insulation layer again on the basis of the first kind, according to voltage class difference, and divides low pressure frame Empty insulated cable and middle pressure aerial insulated cable.Low pressure aerial insulated cable only has insulating layer, and middle pressure aerial insulated cable band is led Body shielding and insulating layer or conductor shielding, insulation and insulation screen.First kind aerial condutor in use, first is that Due to being formed with the direct process of metal wire of the same race or not of the same race, during laying unwrapping wire, strands are held since there are residual stress It is easily loose, it causes constructional difficulties or leaves accident potential；Second is that convex-concave is not since conductive line surfaces are constituted by justifying single line one by one It is flat, corona is easily formed, in use, corona is more also easy to produce especially on high pressure, super-pressure overhead transmission line, to reduce corona discharge, Usually use split conductor；Third is that due to uneven, the easy accumulated snow of conductive surface, also, since single metal wire is directly sudden and violent In air, cooling is fast for dew, and under conditions of meteorological condition is unfavorable, Yi Jibing, accumulated snow and accumulated ice often will cause route damage； Fourth is that this conducting wire because between circle single line contact surface it is few, rainwater is almost around whole single line, and all strands are completely disposed at rain in conducting wire In this weak electrolyte liquid of water, the time is slightly long, and chemical attack or electrochemical corrosion can occur for single line and stranded, causes route power transmission Difficult or broken string is dangerous, in use, the corrosivity of rainwater or salt fog is stronger on island.Although the second class aerial insulated cable exists It is added to insulating layer (or insulating layer and shielded layer) outside bare conductor, certain deficiencies of bare conductor can be overcome, but cause shaft tower Load increases, and arc sag decline, wind load coefficient is big, and vibration aggravation, safety coefficient is small, so, it is only used for the overhead line of mesolow On the road.

Utility model content

In order to solve the above technical problems, the utility model provides a kind of aerial condutor with thin insulating, including makes somebody a mere figurehead and lead Wire core and thin dielectric layer.The thin dielectric layer is extruded in aerial condutor core periphery, forms shiny surface.

Further, the center of aerial condutor core is by one or more galvanized steel wire or aluminum-clad steel wire or aluminium alloy wire Process forms, outer one or more layers aluminum steel of process or aluminium alloy wire again.

Further, thin dielectric layer is with a thickness of the weather-proof crosslinking of 0.3-1.0mm or non-crosslinked polyvinyl chloride insulation, gathers Ethylene insulating materials, the performance of Insulation Material meet GB/T12527 requirement.

Further, the surface of the thin dielectric layer extruded is smooth cylindrical surface, and thin dielectric layer is amenable to GB/T3048.9 Defined spark-testing.

The conducting wire of the utility model is easy to construct, and does not generate corona, is not easy accumulated ice or accumulated snow.It is reduced using thin dielectric layer The diameter of common aerial insulated cable and self weight, tower load is small, and arc sag is small, and wind load coefficient is small, with small vibration, and safety coefficient is high, And it can effectively avoid rainwater or salt fog enter inside conducting wire, chemical attack will not occur for strands, thus the use of extension lead Service life.

Detailed description of the invention

FIG. 1 is a schematic structural view of the utility model.

Fig. 2 is the aerial core structure schematic diagram of the utility model.

In figure, 1. aerial condutor cores, 2. thin dielectric layers, 3. process layers one, 4. process layers two.

Specific embodiment

As illustrated in fig. 1 and 2, a kind of aerial condutor with thin insulating, including aerial condutor core 1, thin dielectric layer 2.It is thin absolutely Edge layer 2, which extrudes, is coated on 1 periphery of aerial condutor core.Aerial condutor core 1 can be aluminum stranded conductor, aluminium alloy stranded conductor, steel-core-aluminium Twisted wire, steel core aluminum alloy stranded wire, steel-aluminum wire or aluminium packet steel core aluminum alloy stranded wire.The thin dielectric layer 2 is thickness The weather-proof crosslinking of 0.3-1.0mm or non-crosslinked type thin insulating plastics.

The aerial condutor core meets TG/T1179 requirement.

The weather-proof artificial weathering test for meeting GB/T12527.

Embodiment

Aerial condutor core 1 is first made, then extrudes one layer of thin dielectric layer 2 outside aerial condutor core 1.Aerial condutor core 1 center is process layer 1, and process layer 1 can be closed by one or more galvanized steel wire or aluminum-clad steel wire, or high-intensitive aluminium Gold thread process forms, and one layer of process layer 24 of process, process layer 24 can be by one or more layers aluminum steel or aluminium alloy wires again for outside Process forms.Conductor wire core center mainly undertakes stretching resistance effect, and the aluminum steel or aluminium alloy wire of outside process assume responsibility for conductive work It is acted on with part stretching resistance.The requirement of aerial condutor core 1 meets the standard of corresponding aerial condutor.Thin dielectric layer 2 is by one layer It is constituted with a thickness of the weather-proof crosslinking of 0.3-1.0mm or non-crosslinked type thin insulating plastics.

The sublevel insulation principle that plastics add air is utilized in the thin insulating aerial condutor, and the kind of plastics is different, and dielectric is normal Number is also different, usually 2.5-8.0, due to the plastic insulating layer dielectric constant close to conducting wire, compared with the dielectric constant of outside air (usually 1.0) are high, can reach the purpose of uniform electric field, improve the discharge inception voltage of aerial condutor, is i.e. this kind of conducting wire is not easy shape At corona, especially in use, effect becomes apparent on high pressure, super-pressure overhead transmission line；Due to improving the benefit of air insulation With coefficient, spacing between conducting wire can be made suitably to reduce, save the space passage；Simultaneously as the outermost layer of this kind of aerial condutor is Aerial condutor core can be strapped in the inside, form an entirety by one layer of plastic sheath, when construction, conducting wire pine stock would not occur Phenomenon eliminates the hidden danger of quality caused by constructing；Due to the thinner thickness of the plastic insulating layer, conducting wire will not be caused too much Diameter increases and weight increases, thus, small to the loading effect of shaft tower, the more original conducting wire of wind load coefficient increases seldom, and safety is Number is high；This layer of smooth weather-proof crosslinking extruded outside wire core or non-crosslinked type ambroin, are not easy accumulated snow, also, every Contact of the plain conductor with air absolutely, when meteorological condition is unfavorable, the overhead stranded conductor cooling of plastic layer more conventional bare metal is slow, To be not easy accumulated ice；Because of one layer of thin insulating plastic sheath, rainwater or salt fog not can enter inside conducting wire, and strands will not occur Chemical attack, so that the service life of conducting wire is extended, in use, salt is larger in air or rainwater especially on island, this Kind conducting wire prolongs the service life more obvious.

Claims

1. a kind of aerial condutor with thin insulating, it is characterised in that: including aerial condutor core (1) and thin dielectric layer (2)；It is described Thin dielectric layer (2) is extruded in aerial condutor core (1) periphery；The thin dielectric layer (2) is with a thickness of the weather-proof of 0.3-1.0mm Crosslinking or non-crosslinked polyvinyl chloride insulation, polyethylene insulation material.

2. a kind of aerial condutor with thin insulating described in accordance with the claim 1, it is characterised in that: the aerial condutor core (1) center is formed by one or more galvanized steel wire or aluminum-clad steel wire or aluminium alloy wire process, outer one layer of process again or Multilayer aluminum steel or aluminium alloy wire.

3. a kind of aerial condutor with thin insulating described in accordance with the claim 1, it is characterised in that: the thin dielectric layer (2) extruded Surface be smooth cylindrical surface.