CN208985729U - Middle strength aluminium alloy twisted wire aerial condutor - Google Patents

Abstract

The utility model relates to a kind of conducting wires, more particularly, to a kind of aerial condutor of use in economizer circuit and super-pressure, UHV Transmission Engineering.A kind of middle strength aluminium alloy twisted wire aerial condutor, it include the core layer of multilayer concentric arrangement, every layer line sandwich layer includes more cores, core layer is successively incremented by from the inside to the outside, the cross section of the core of first layer core layer and second layer core layer from the inside to the outside is circle, by third layer core layer, the cross section of the core of core layer be it is trapezoidal or round, trapezoidal core layer and round core layer are alternately arranged.The utility model provides security performance height, and tensile strength is high, middle strength aluminium alloy twisted wire aerial condutor with long service life；It is low to solve security performance existing in the prior art, aerial condutor loss is big, and transmission capacity is small, and security risk is high, the technical problem of antifatigue effect difference.

Description

Middle strength aluminium alloy twisted wire aerial condutor

Technical field

The utility model relates to a kind of conducting wires, defeated in economizer circuit and super-pressure, extra-high voltage more particularly, to a kind of use Aerial condutor on electrical engineering.

Background technique

Country advocates energy-saving and emission-reduction energetically.For power industry, the transmission losses in electrical energy transportation link how is reduced, It always is the hot spot that we pay high attention to.Leader cable usually on some super-pressure, UHV Transmission Engineering is using aerial Wire scheme, however due to the super-pressure in its use, extra-high voltage special circumstances, however since conducting wire itself exists after aerial Sag characteristic factor, be easy therefore there is security risk, that overload capacity is low, antifatigue special efficacy is poor, service life is low etc. is scarce The problem of falling into.Novel energy-conserving conducting wire is gradually promoted and applied in recent years as one of most effective energy-saving tool of transmission line of electricity.

Summary of the invention

The utility model provides security performance height, and tensile strength is high, middle strength aluminium alloy Wire twisting frame with long service life Hollow wire；It is low to solve security performance existing in the prior art, aerial condutor loss is big, and transmission capacity is small, and security risk is high, The technical problem of antifatigue effect difference.

The above-mentioned technical problem of the utility model is solved by following technical proposals: a kind of middle strength aluminium alloy twisted wire Aerial condutor includes the core layer of multilayer concentric arrangement, and every layer line sandwich layer includes more cores, and core layer is layer-by-layer from the inside to the outside It is incremented by, the cross section of the core of first layer core layer and second layer core layer from the inside to the outside is circle, by third layer core layer Start, the cross section of the core of core layer be it is trapezoidal or round, trapezoidal core layer and round core layer are alternately arranged.Round core Layer and prompting core layer are alternately arranged, and on the basis of guaranteeing original electric conductivity, tensile strength can be improved, and are increased conducting wire and are drawn weight Than reducing vertical load, increasing wire elongation, and then improve the safety that conducting wire uses.It uses the periphery of trapezoidal core layer Bandage is tied up securely, and the diameter of cable can be reduced, thus lower loss, meanwhile, make energy between each core layer even closer It twists together, enhances the tensile strength of cable.

Preferably, the core of the core layer uses aluminium alloy conductor sub-thread single line.Aluminium alloy conductor with it is identical outer The steel-cored aluminium strand of diameter is compared, lower D.C. resistance, and does not have steel core, and AC resistance is lower.And it is twisted without steel-core-aluminium All eddy current losses of line and magnetic hysteresis loss.Therefore there is better economic benefit.

More preferably, the aluminium alloy conductor sub-thread single line uses the aluminium alloy single line of model 1120.With more Big drawing is compared again, i.e., the ratio between total pull-off force and its Unit Weight, improves line security operation.

Preferably, accelerating of setting of every layer of single line number of share of stock lay configuration increases by 2 strands, 4 strands or 6 for every layer The lay configuration of stock.It is further preferred that accelerating of setting of the conducting wire number of share of stock lay configuration increases by 6 strands for every layer Lay configuration.The sag characteristic of aerial condutor entirety is improved, safety in utilization is improved.

Preferably, the width of the trapezoidal core layer is identical as the round diameter of core layer.

Preferably, the lay configuration is formed using the concentric process of frame type stranding machine.Pass through control twisted wire tension Uniformity makes whole conducting wire not generate snakelike defect.

Therefore, the middle strength aluminium alloy twisted wire aerial condutor of the utility model has following advantages:

It can be under the premise of meeting tensile strength as defined in conducting wire, for the first time by high-conductivity aluminum alloy line and high conductivity aluminum steel It is twisted, loss is greatly reduced, the transmission capacity of route is improved, improves conducting wire safety in utilization, improves wire overloading ability, It is antifatigue special to improve, and improves service life.With better sag characteristic, line construction investment can be reduced, improves route peace Full reliability of operation；The steel tower weighted design of stringing also can reduce.

Detailed description of the invention

Fig. 1 is the schematic diagram of the middle strength aluminium alloy twisted wire aerial condutor of the utility model.

Specific embodiment

Below with reference to the embodiments and with reference to the accompanying drawing the technical solution to utility model is described in further detail.

Embodiment:

As shown in Figure 1, a kind of middle strength aluminium alloy twisted wire aerial condutor, includes the core layer of multilayer concentric arrangement, often Layer line sandwich layer includes more cores, and core layer is successively incremented by from the inside to the outside, first layer core layer 1 and the second layer line from the inside to the outside The cross section of the core of sandwich layer 2 is circle, and by third layer core layer, the cross section of the core of single layer core layer 3 is circle, The core cross section of the double-deck core layer 4 is trapezoidal.The width of trapezoidal core layer is identical as the round diameter of core layer.Trapezoidal core The external peripheral surface of layer is bound with strapping, reduces cable diameter, while trapezoidal core layer can be allowed more to be adjacent to round core layer, Under the premise of the tensile strength as defined in meeting, reduce vertical load, increases wire elongation and safety.The line of core layer Core uses aluminium alloy conductor sub-thread single line.Aluminium alloy conductor sub-thread single line uses the aluminium alloy single line of model 1120.

The common aerial condutor (JL/G1A-185/30) for comparing same outer diameter, using this model aluminium alloy stranded conductor (AAAC 1120-19/3.75) there is bigger drawing to compare again, i.e., the ratio between total pull-off force and its Unit Weight have reached 8.47, sag characteristic It is good, line construction investment can be reduced, and improve line security reliability of operation.20 DEG C of direct currents of JL/G1A-185/30 Resistance rate is 0.1592 Ω/km, and AAAC 1120-19/3.75 dc resistivity maximum only has 0.142 Ω/km.1120 types simultaneously Aluminium alloy stranded conductor steel core free does not generate magnetic hysteresis loss and eddy current loss, therefore drops when energy loss reduction, especially large capacity transmission Consumption is obvious.In terms of the construction of route, using strength aluminium alloy twisted wire in high conductivity, because of Unit Weight ratio when same outer diameter Common aerial condutor is low, and the steel tower weighted design of stringing also can reduce, and also just reduces the land use of steel tower construction relatively Area.It is formed when twisted using the frame type stranding machine process comprising advanced tension control system, adjusts pre twist, to guarantee Guarantee the twisted even tension of 1120 type aluminium alloy stranded conductors.Using mature twisting process technology, guarantee that conducting wire process is closely justified It is whole not loose.The conducting wire number of share of stock lay configuration setting is accelerated as the lay configuration of every layer of 6 strands of increase.

Claims (6)

1. a kind of middle strength aluminium alloy twisted wire aerial condutor, it is characterised in that: include multilayer concentric arrangement core layer, every layer Core layer includes more cores, and core layer is successively incremented by from the inside to the outside, first layer core layer and second layer core from the inside to the outside The cross section of the core of layer is circle, and by third layer core layer, the cross section of the core of core layer is trapezoidal or round, ladder Shape core layer and round core layer are alternately arranged.

2. middle strength aluminium alloy twisted wire aerial condutor according to claim 1, it is characterised in that: the line of the core layer Core uses aluminium alloy conductor sub-thread single line.

3. middle strength aluminium alloy twisted wire aerial condutor according to claim 2, it is characterised in that: the aluminium alloy conductor Sub-thread single line uses the aluminium alloy single line of model 1120.

4. middle strength aluminium alloy twisted wire aerial condutor according to claim 2 or 3, it is characterised in that: every layer of list The setting of strand count lay configuration is accelerated as the lay configuration of every layer of 2 strands, 4 strands or 6 strands of increase.

5. middle strength aluminium alloy twisted wire aerial condutor according to claim 1 or 2 or 3, it is characterised in that: described is trapezoidal The width of core layer is identical as the round diameter of core layer.

6. middle strength aluminium alloy twisted wire aerial condutor according to claim 1 or 2 or 3, it is characterised in that: twisted to use frame Formula stranding machine process forms.