CN215007686U - Self-damping low wind pressure conducting wire - Google Patents
Self-damping low wind pressure conducting wire Download PDFInfo
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- CN215007686U CN215007686U CN202121631057.3U CN202121631057U CN215007686U CN 215007686 U CN215007686 U CN 215007686U CN 202121631057 U CN202121631057 U CN 202121631057U CN 215007686 U CN215007686 U CN 215007686U
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Abstract
The utility model relates to a low wind pressure wire of self-damping type, including inner core, middle part conducting wire layer and the outside conducting wire layer that from interior to exterior set gradually, middle part conducting wire layer transposition is on the inner core, and outside conducting wire layer transposition is on the middle part conducting layer, and outside conducting wire layer includes the first electrically conductive single line of stranded, and the middle part conducting wire layer includes the electrically conductive single line of stranded second, and the electrically conductive single line of second is transversal trapezoidal of personally submitting, forms the clearance between middle part conducting wire layer and the inner core, and the surface of the first electrically conductive single line is provided with the concave arc portion. The utility model discloses a wire has higher self damping nature, does benefit to and reduces the wind pressure, has improved the holistic anti-wind effect of wire.
Description
Technical Field
The utility model belongs to the technical field of overhead line transmission conductor technique and specifically relates to indicate a low wind pressure wire of self-damping type.
Background
At present, an overhead transmission conductor usually adopts a steel-cored aluminum strand as an electric energy transmission carrier, and a common steel-cored aluminum strand can generate certain potential safety hazards under working conditions such as disastrous strong wind or stable transverse breeze, for example: accidents such as pole and tower falling, wire breakage, windage yaw, pollution flashover, insulator string removal, hardware breakage and the like of the power transmission line are easy to happen under the action of strong wind; or under the action of even breeze, the leeward side of the wire is easy to form periodic karman vortex to excite the wire to vibrate up and down, and the long-time breeze vibration causes the wire fatigue and strand breakage accident. Therefore, the existing overhead conductor has poor wind resistance effect and short service life, and cannot ensure the safe operation of a power transmission line.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model discloses the technical problem that will solve lies in overcoming the not good defect of air wire anti-wind effect among the prior art.
For solving the technical problem, the utility model provides a low wind pressure wire of self-damping type, include inner core, middle part conducting wire layer and the outside conducting wire layer that from interior to exterior set gradually, middle part conducting wire layer transposition is on the inner core, outside conducting wire layer transposition is on the middle part conducting wire, outside conducting wire layer includes the first electrically conductive single line of stranded, middle part conducting wire layer includes the electrically conductive single line of stranded second, the electrically conductive single line of second is transversal personally submits trapezoidally, form the clearance between middle part conducting wire layer and the inner core, the surface of the first electrically conductive single line is provided with the concave arc portion.
In an embodiment of the present invention, the outer surface of the outer conductive line layer is provided with a sand blasting layer.
In an embodiment of the present invention, the first conductive single wire is one of a hard aluminum wire, an aluminum-magnesium-silicon alloy wire, or a heat-resistant aluminum wire.
In an embodiment of the present invention, the inner core is made of aluminum clad steel wire.
In one embodiment of the present invention, the inner core is mainly formed by twisting a plurality of strands of aluminum-clad steel wires.
In an embodiment of the present invention, the cross section of the aluminum-clad steel wire is circular.
In an embodiment of the present invention, the second conductive single wire is one of a hard aluminum wire, an aluminum-magnesium-silicon alloy wire, or a heat-resistant aluminum wire.
The utility model discloses an embodiment, can set up multilayer middle part conducting wire layer between outside conducting wire layer and the inner core, adjacent middle part conducting wire layer hank is to opposite, and the pitch ratio of outside conducting wire layer is not more than adjacent middle part conducting wire layer.
In an embodiment of the invention, the twist direction of the outer conductive line layer is right direction.
In one embodiment of the present invention, the pitch ratio of the external conductive line layer is 10 to 12.
Compared with the prior art, the technical scheme of the utility model have following advantage:
low wind pressure wire of self-damping type, higher self-damping nature has, do benefit to and reduce the wind pressure, improved the holistic anti-wind effect of wire to the fail safe nature of circuit operation has been improved.
Drawings
In order to make the content of the present invention more clearly understood, the present invention will be described in further detail with reference to the following embodiments of the present invention, in conjunction with the accompanying drawings.
Fig. 1 is a schematic structural view of a self-damping low wind pressure conducting wire of the present invention;
the specification reference numbers indicate: 1. an inner core; 2. a middle conductive line layer; 21. a second conductive element line; 3. an outer conductive line layer; 31. a first conductive element wire; 32. a concave arc portion; 4. a gap.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1, the utility model discloses a low wind pressure wire of self-damping type, including inner core 1, middle part conducting wire layer 2 and outside conducting wire layer 3 that set gradually from inside to outside, middle part conducting wire layer 2 transposition is on inner core 1, outside conducting wire layer 3 transposition is on middle part conducting wire layer 2, outside conducting wire layer 3 includes stranded first conductive single line 31, middle part conducting wire layer 2 includes stranded second conductive single line 21, the cross section of second conductive single line 21 is trapezoidal, form clearance 4 between middle part conducting wire layer 2 and the inner core 1; because the cross section of the second conductive single wire 21 is trapezoidal, when the second conductive single wires 21 are concentrically twisted on the inner core 1, the adjacent second conductive single wires 21 are tightly pressed and tightly arched, so that the gap 4 is naturally formed between the middle conductive wire layer 2 and the inner core 1;
through the arrangement of the gap 4, the inner core 1 and the middle conducting wire layer 2 are mutually collided when the conducting wire vibrates, the energy consumption effect is increased, and the self-damping performance of the conducting wire is superior to that of a common steel-cored aluminum strand.
In one embodiment, the gap 4 is 0.7 ± 0.2 mm.
In addition, the concave arc part 32 is arranged on the outer surface of the first conductive single wire 31, the arrangement can increase the roughness of the outer surface and reduce the wind resistance coefficient of the wire, thereby reducing the wind pressure of the wire, and particularly reducing the wind resistance coefficient of the equal-diameter steel-cored aluminum strand to be less than 80% of the wind resistance coefficient of the equal-diameter steel-cored aluminum strand at high wind speed (more than or equal to 35 m/s).
In one embodiment, the outer surface of outer conductive wire layer 3 is provided with a sandblasted layer. The wire has viscous friction with the surrounding air when vibrating, the surface smoothness of the wire is effectively reduced by sand blasting treatment, the energy consumption caused by the viscous friction is increased, and the energy consumption is increased, so that the vibration disappears faster; in addition, the sand blasting treatment also reduces the reflectivity of the wire, reduces the sunlight reflected by the surface of the wire, and enables the outer surface of the wire to be a matte surface, thereby reducing the light pollution.
In one embodiment, the first conductive element wire 31 is one of a hard aluminum wire, an aluminum-magnesium-silicon alloy wire, or a heat-resistant aluminum wire.
Specifically, the first conductive element wire 31 is one of a hard aluminum wire having a conductivity of 61.0% to 62.5% IACS, an aluminum-magnesium-silicon alloy wire having a conductivity of 52.5% to 58.5% IACS, and a heat-resistant aluminum wire having a conductivity of 60.0% IACS.
In one embodiment, the twisting direction of the outer conductive wire layer 3 is the right direction, and the pitch ratio is 10-12.
In one embodiment, the inner core 1 is made of aluminum clad steel wire. The cross section of the aluminum clad steel wire is circular. The inner core may be formed by stranding a plurality of aluminum-clad steel wires, for example, one or two layers of equal diameter (high strength) aluminum-clad steel wires may be formed by concentrically stranding one (high strength) aluminum-clad steel wire outer layer.
The high-strength aluminum-clad steel wire is adopted to replace the traditional galvanized steel core: on one hand, the conductivity of the lead can be effectively improved and the loss of the power transmission line can be reduced under the condition that the integral bearing performance is not reduced; on the other hand, the unit length and the mass of the wire can be reduced, the tension-to-weight ratio of the wire is improved, and the sag performance of the circuit is optimized; in addition, the inner core in the form of the aluminum bag is adopted, so that electrochemical corrosion between the inner core and the outer layer aluminum strands can be avoided, and the service life of the lead is prolonged.
Further, when the inner core 1 is 7 aluminum-clad steel wires, the pitch diameter ratio of 6 layers is 16-26, and the twisting direction of the 6 layers is opposite to that of the adjacent middle conductive layer; when the inner core 1 is 19 aluminum-clad steel wires, the pitch diameter ratio of 6 layers is 16-26, the pitch diameter ratio of 12 layers is 14-22, the twisting direction of the 12 layers is opposite to that of the adjacent middle conductive wire layer 2, and the twisting directions of the rest layers meet the requirement that the twisting directions of the adjacent layers are opposite.
In one embodiment, the second conductive single wire 21 is one of a hard aluminum wire, an aluminum-magnesium-silicon alloy wire, or a heat-resistant aluminum wire.
Specifically, the second conductive single wire is 21 made of one of a hard aluminum wire with the conductivity of 61.0-62.5% IACS, an aluminum-magnesium-silicon alloy wire with the conductivity of 52.5-58.5% IACS and a heat-resistant aluminum wire with the conductivity of 60.0% IACS.
In one embodiment, multiple middle conductive line layers 2 may be disposed between the outer conductive line layer 3 and the inner core 1, adjacent middle conductive line layers 2 are oppositely twisted, and the pitch-diameter ratio of the outer conductive line layer 3 is not greater than that of the adjacent middle conductive line layers 2. The pitch diameter ratio of the middle conductive wire layer 2 is 10-16.
The embodiment also discloses a manufacturing method of the self-damping low wind pressure conducting wire, which comprises the following steps:
preparing an inner core 1, a first conductive single line 31 and a second conductive single line 21, wherein the cross section of the second conductive single line 21 is trapezoidal; the outer surface of the first conductive single line is provided with a concave arc part;
stranding a plurality of second conductive single wires 21 on the outer surface of the inner core 1 by adopting a frame-type stranding machine to form a middle conductive wire layer 2;
a plurality of first conductive element wires 31 are twisted on the outer surface of the middle conductive wire layer 2 using a frame-type twisting machine to form the outer conductive wire layer 3.
In one embodiment, the first conductive element line 31 is prepared by: a first heat-resistant alloy rod is produced by a continuous casting and rolling mill and is drawn into a first conductive element wire 31 having a predetermined diameter and an outer surface provided with a concave arc portion 32.
In one embodiment, the second conductive single line 21 is prepared by: and producing a second heat-resistant alloy rod by a continuous casting and rolling machine, and drawing the second heat-resistant alloy rod into a second conductive single wire 21 with a preset diameter and a trapezoidal cross section.
It is understood that the raw material preparation, i.e., the proportional mixing of the raw material components, is performed before the first/second heat-resistant alloy rods are produced by the continuous casting and rolling mill.
Different from the conventional aluminum or aluminum alloy wire drawing production equipment and operation method, when the first conductive single wire and the second conductive single wire of the first wire are prepared, certain equipment transformation is required during wire drawing, and the following special operations are carried out: 1. each pass of wire drawing die needs to be fixed according to the same rule (the shape of the section of the molded line); 2. in the wire drawing process, the single wire is tightly and tidily wound to the drum wheel according to the principle that the shape of the single wire is consistent with the shape of the hole in the inner cavity of the wire drawing die, and the single wire is tensioned by the aid of the auxiliary tension pulley, so that the molded wire is prevented from being overturned in the wire drawing process; 3. adjusting an electric control device of the wire drawing machine to enable the wire winding speed and the wire arranging speed to be consistent when the equipment is started or stopped and the wire is normally drawn, and ensuring that no local wire collapse or wire pressing occurs when the wire is drawn and arranged at a high speed; 4. and a special molded line winding displacement positioning wheel is manufactured to ensure that the winding displacement is compact and neat and does not turn over when the molded lines are wound.
In one of them embodiment, before adopting frame stranding machine to strand, need reequip the inside of frame stranding machine: manufacturing a nylon branching plate, and avoiding cross scraping, bending and twisting between medium lines in the paying-off process; and manufacturing a wire distributing positioning tube which has the same shape with the section of the molded line and slightly enlarged size, and avoiding the molded line from rotating before entering the wire distributing plate. Before the molded lines are twisted, a whole set of wear-resistant nylon guide wheel and guide nozzle need to be replaced to ensure that the guide wheel and the guide nozzle can rotate normally and flexibly, the quality and the rotation flexibility of the guide nozzle of the guide wheel are checked regularly, and the molded lines are prevented from being scratched and broken due to clamping; specially customizing a distribution board according to the shape and the size of the section of the molded line to position the inner groove of the guide wheel, and eliminating the shaking of the single line in the groove; the molded lines at the position of the stranded and folded lines are prevented from turning over by means of the limiting of the adjustable guide wheel of the distributing board.
In one embodiment, after the plurality of first conductive element wires 31 are twisted on the outer surface of the middle conductive wire layer 2 to form the outer conductive wire layer 3, the outer surface of the outer conductive wire layer 3 is subjected to sand blasting to form a sand blasting layer. During sand blasting, steel grit with certain granularity is thrown off at a high speed through a sand blasting device and impacts the outer surface of the external conductive wire layer 3, so that a layer of tiny, dense and uniform pits are formed on the outer surface, and when light irradiates the surface of a workpiece, the pits can reflect the light to different directions, and a matte effect is achieved.
According to the self-damping low-wind-pressure lead wire, through the design of the middle conductive wire layer 2 and the outer conductive wire layer 3, the self-damping property of the lead wire is effectively improved, and the vibration energy consumption is improved, so that the vibration intensity and the duration time are effectively reduced, and the fatigue and strand breakage of the overhead lead wire in the life cycle are avoided; in addition, the wind resistance coefficient of the wire can be effectively reduced, and the wind pressure is reduced, so that the wind load of the wire under the working condition of strong wind is reduced, and the wind load transmitted to the tower by the wire is indirectly reduced, so that the safety and reliability of the operation of the line are improved, the corrosion resistance of the wire is effectively improved, the design strength of the tower is reduced, and the overall investment of the line is favorably reduced.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. The utility model provides a low wind pressure wire of self-damping type which characterized in that: the novel conductive wire comprises an inner core, a middle conductive wire layer and an outer conductive wire layer which are sequentially arranged from inside to outside, wherein the middle conductive wire layer is stranded on the inner core, the outer conductive wire layer is stranded on the middle conductive layer, the outer conductive wire layer comprises a plurality of first conductive single wires, the middle conductive wire layer comprises a plurality of second conductive single wires, the cross section of each second conductive single wire is trapezoidal, a gap is formed between the middle conductive wire layer and the inner core, and the outer surface of each first conductive single wire is provided with a concave arc part.
2. The self-damping low wind pressure conductor of claim 1, wherein: and a sand blasting layer is arranged on the outer surface of the external conductive wire layer.
3. The self-damping low wind pressure conductor of claim 1, wherein: the first conductive single wire is made of one of a hard aluminum wire, an aluminum-magnesium-silicon alloy wire or a heat-resistant aluminum wire.
4. The self-damping low wind pressure conductor of claim 1, wherein: the inner core is made of aluminum-clad steel wires.
5. The self-damping low wind pressure conductor of claim 4, wherein: the inner core is mainly formed by stranding a plurality of strands of aluminum-clad steel wires.
6. The self-damping low wind pressure conductor of claim 4, wherein: the cross section of the aluminum-clad steel wire is circular.
7. The self-damping low wind pressure conductor of claim 1, wherein: the second conductive single wire is made of one of a hard aluminum wire, an aluminum-magnesium-silicon alloy wire or a heat-resistant aluminum wire.
8. The self-damping low wind pressure conductor of claim 1, wherein: a plurality of middle conducting wire layers can be arranged between the outer conducting wire layer and the inner core, the twisting directions of the adjacent middle conducting wire layers are opposite, and the pitch-diameter ratio of the outer conducting wire layer is not larger than that of the adjacent middle conducting wire layer.
9. The self-damping low wind pressure conductor of claim 1, wherein: the twisting direction of the external conductive wire layer is the right direction.
10. The self-damping low wind pressure conductor of claim 1, wherein: the pitch diameter ratio of the external conductive wire layer is 10-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121631057.3U CN215007686U (en) | 2021-07-16 | 2021-07-16 | Self-damping low wind pressure conducting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121631057.3U CN215007686U (en) | 2021-07-16 | 2021-07-16 | Self-damping low wind pressure conducting wire |
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| Publication Number | Publication Date |
|---|---|
| CN215007686U true CN215007686U (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121631057.3U Active CN215007686U (en) | 2021-07-16 | 2021-07-16 | Self-damping low wind pressure conducting wire |
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| CN (1) | CN215007686U (en) |
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- 2021-07-16 CN CN202121631057.3U patent/CN215007686U/en active Active
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