CN107587775B - Power transmission tower - Google Patents
Power transmission tower Download PDFInfo
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- CN107587775B CN107587775B CN201710970659.3A CN201710970659A CN107587775B CN 107587775 B CN107587775 B CN 107587775B CN 201710970659 A CN201710970659 A CN 201710970659A CN 107587775 B CN107587775 B CN 107587775B
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Abstract
The invention relates to a power transmission tower, which comprises a tower body, a tower cover and a tower cover, wherein the tower body comprises a polygonal annular tower head and a tower body for supporting the tower head; the lowermost corner of the tower head is connected to the top of the tower body; the intermediate phase insulator V string is connected to the tower head in a hanging manner and is positioned in the annular area of the tower head; the two groups of side phase composite cross arms are respectively positioned at two sides of the tower body; the end of the side phase composite cross arm is connected to a bifurcate arm and the tower body, and the bifurcate arm is two sides of the lowermost corner of the tower head. Above-mentioned power transmission tower, because its special structure, the structural feature of compound cross arm make full use of tower body in limit looks has reduced the corridor width.
Description
Technical Field
The invention relates to the technical field of power transmission, in particular to a power transmission tower.
Background
At present, the power transmission tower is generally a wine glass tower or a cat-head tower, namely, the tower body is in a wine glass shape or a cat-head shape. However, the construction of the wine glass tower and the cat-head tower is not conducive to further reduction of the corridor width.
Disclosure of Invention
In view of this, it is necessary to provide a power transmission tower having a small corridor width, which is a problem of the power transmission tower having a large corridor width in the related art.
A transmission tower comprising:
the tower body comprises a polygonal annular tower head and a tower body for supporting the tower head; the lowermost corner of the tower head is connected to the top of the tower body;
the intermediate phase insulator V string is connected to the tower head in a hanging manner and is positioned in the annular area of the tower head;
the two groups of side phase composite cross arms are respectively positioned at two sides of the tower body; the end of the side phase composite cross arm is connected to a bifurcate arm and the tower body, and the bifurcate arm is two sides of the lowermost corner of the tower head.
Above-mentioned transmission tower, because its special structure, the compound cross arm in limit looks make full use of tower body's structural feature has reduced the corridor width.
In one embodiment, the side phase composite cross arm comprises a line insulator, a post insulator and a metal connecting piece; the end parts of the line insulator and the post insulator are connected together through the metal connecting piece.
In one embodiment, the ends of the line insulators remote from the metal connectors are connected to the bifurcation arms, and the ends of the post insulators remote from the metal connectors are connected to the tower.
In one embodiment, the post insulator is bolted to the projecting plate of the tower.
In one embodiment, the line insulator is suspended from the extension plate of the bifurcated arm by a link fitting.
In one embodiment, the end of the line insulator remote from the metal connector is connected to the furcation arm and the end of the post insulator remote from the metal connector is connected to the tower at the connection point of the tower and the furcation arm.
In one embodiment, the number of the post insulators is two, and an included angle formed by extension lines of the two post insulators is 15-75 degrees.
In one embodiment, the lowermost angle of the tower head is 30-120.
In one embodiment, the transmission tower further comprises ground wire brackets positioned on both sides of the top end of the tower head.
In one embodiment, the tower body is built by a plurality of angle steels.
Drawings
Fig. 1 is a schematic perspective view of a power transmission tower according to an embodiment of the present invention.
Fig. 2 is a schematic front view of the transmission tower of fig. 1.
Fig. 3 is a side view schematic of the transmission tower of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 3, a power transmission tower 100 according to an embodiment of the present invention includes a tower body 110, a mid-phase insulator V-string 130, and two sets of side-phase composite cross arms 120.
Among them, the tower body 110 is a main body portion of the power transmission tower 100, and is a skeleton of the power transmission tower 100. The main function is to support and mount the middle phase insulator V string 130 and the two sets of side phase composite cross arms 120.
Specifically, the tower body 110 includes a tower head 111 and a tower body 112 for supporting the tower head 111. The tower head 111 is in a polygonal ring shape, that is, the tower head 111 is connected end to end by a plurality of sides to form a ring. The area encircled by the tower head 111 forms the tower window 101. Preferably, the polygon is a convex polygon, which can effectively increase the area of the tower window 101, and is more beneficial to the installation of the intermediate phase insulator V string 130.
In the present embodiment, the tower head 111 has a hexagonal ring shape. Of course, it is understood that the tower head 111 of the present invention is not limited to a hexagonal ring shape, but may be other polygonal ring shapes, such as a pentagonal ring shape.
Specifically, the lowermost angle α of the tower head 111 is connected to the top of the tower body 112, so that the tower body 112 supports the tower head 111. When the tower body 110 is viewed from bottom to top, two sides of the lowest angle α of the tower head 111 can be regarded as branches separated from the top of the tower body 112; therefore, in the present invention, two sides of the lowermost angle α of the tower head 111 are defined as the bifurcated arms 1111.
The tower body 112 is cylindrical. Preferably, the tower body 112 has a conical column shape, i.e. the top of the tower body 112 is smaller and the bottom is larger, which is more favorable for the stability of the whole tower body 110.
In this embodiment, the tower body 110 is constructed of a plurality of angle irons. Of course, it is understood that the tower body 110 of the present invention is not limited to the above-described structure, but may be constructed of other structures, such as composite materials.
For convenience of illustration, the intermediate-phase insulator V-string 130 is shown in fig. 1-2 as a V-shaped line. The main function of the mid-phase insulator V-string 130 is to carry the mid-phase power line (not shown). The mid-phase insulator V-string 130 is suspended from the tower head 111 and the mid-phase insulator V-string 130 is located in the annular region of the tower head 111, i.e. the mid-phase insulator V-string 130 is located at the tower window 101, so that the mid-phase transmission line runs from the tower window 101 through the transmission tower 100.
In the present embodiment, the intermediate phase insulator V string 130 is preferably composed of a line composite insulator. More preferably, the line composite insulator is in the form of a glass fiber reinforced composite material externally coated with a silicone rubber shed.
The main function of the boundary-phase composite cross arm 120 is to carry boundary-phase power transmission lines (not shown). The two groups of side phase composite cross arms 120 are respectively positioned at two sides of the tower body 110; that is, the tower body 110 has a set of side-to-side composite crossarms 120 on both sides. The ends of the side composite cross arm 120 are connected to the diverging arms 1111 and to the tower section 112. That is, side composite crossarms 120 are located within the angular regions of bifurcated arms 111 and tower 112. Thus, the side phase composite cross arm 120 makes full use of the shape characteristics of the tower body 110, not only keeps the side phase power transmission lines away from the intermediate phase power transmission lines, but also can reduce the width of the corridor.
In the present embodiment, the side phase composite cross arm 120 includes a line insulator 121, a post insulator 122, and a metal connector 123; the ends of the line insulator 121 and post insulator 122 are connected together by a metal connector 123. The edge phase transmission line is suspended on the metal connecting piece 123, the line insulator 121 only bears tension, and the post insulator 122 bears pressure and bending moment. Therefore, the structure of the whole power transmission tower 100 can transmit force clearly, and the design is more reasonable.
More preferably, the set of side-phase composite crossarms 120 includes two line insulators 121 and two post insulators 122 and one metal connector 123. In the thickness direction of the tower body, the projections of the two line insulators 121 coincide, and the projections of the two post insulators 122 also coincide. As shown in fig. 1, only the front line insulator 121 and the front post insulator 122 can be seen, while the rear line insulator 121 and the rear post insulator 122 cannot be seen.
Further, in a direction approaching the metal connecting member 123, the two line insulators 121 gradually approach each other; the two line insulators 121 are gradually separated in a direction away from the metal connecting member 123. Similarly, in the direction of approaching the metal connecting member 123, the two post insulators 122 gradually approach; the two post insulators 122 gradually separate in a direction away from the metal connecting member 123. Therefore, the force of the side phase composite cross arm 120 on the tower body 110 can be dispersed, and the whole structure is more stable.
Preferably, the angle formed by the extension lines of the two post insulators 122 is 15 ° to 75 °. Therefore, the composite cross arm can bear larger mechanical strength and can ensure the insulation distance of the composite cross arm.
Preferably, the end of line insulator 121 remote from metal connector 123 is connected to bifurcated arm 1111 and the end of post insulator 122 remote from metal connector 123 is connected to tower 112. That is, the upper portion of side composite cross arm 120 is connected to bifurcated arm 1111 and the lower portion is connected to tower 112. Thus, the shape of the tower body 110 can be further utilized to reduce the corridor width while keeping the side phase power transmission lines away from the middle phase power transmission lines.
In this embodiment, the post insulator 122 is bolted to the extension plate of the tower 112. The connection is stable, simple and convenient. Of course, it is to be understood that the post insulator 122 and tower 112 connection of the present invention is not limited to the above-described form, and may be in other forms as deemed appropriate by one skilled in the art.
In the present embodiment, the line insulator 121 is suspended from the extension plate of the branch arm 1111 by a link fitting. The connection is stable, simple and convenient. Of course, it is to be understood that the connection of the line insulator 121 to the bifurcated arm 1111 of the present invention is not limited to the above-described form, but may be in other forms as deemed appropriate by those skilled in the art.
In the present embodiment, the line insulator 121 and the post insulator 122 are provided with grading rings. Of course, one or the other or neither may be provided according to actual conditions.
In the present embodiment, the line insulator 121 is preferably a composite line insulator, and the post insulator 122 is preferably a composite post insulator. More preferably, the line insulator 121 and the post insulator 122 are both made of glass fiber reinforced composite material and are externally coated with a silicone rubber shed.
In this embodiment, the included angle between the diverging arms 1111 is preferably 30 ° to 120 °, so that the structure between the tower body 112 and the tower head 111 is stable, and the composite cross arm 120 with side phase is supported better. Therefore, the load distribution uniformity of each part of the power transmission tower can be improved, and the mechanical property of the whole tower is improved.
In this embodiment, the transmission tower 100 further includes ground brackets 115 for carrying a ground (not shown), and the ground brackets 115 are located on both sides of the top end of the tower head 111. Due to the special structure of the power transmission tower, compared with the existing wine glass tower and cat-head tower, the ground wire bracket 115 is shortened, and the length of the ground wire bracket 115 is reduced, so that the material is saved, and the weight of the whole power transmission tower is reduced.
In the present embodiment, the ground wire holder 115 is built up together with angle iron as in the tower head 111.
In another embodiment, the end of line insulator 121 remote from metal connector 130 is connected to bifurcated arm 1111 and the end of post insulator 122 remote from metal connector 130 is connected to the junction of tower 112 and bifurcated arm 1111.
Of course, it is understood that the positions of the line insulator 121 and the post insulator 122 connected to the tower 112 are not limited to the above positions, and other positions are also possible. For example, the line insulator and the post insulator are connected to the bifurcated arm, or the line insulator and the post insulator are connected to the tower body.
The power transmission tower integrates the advantages of the existing cat-head tower and the existing wine glass tower, can obviously reduce the corridor of a power transmission line, reduces the line removal cost, greatly lightens the weight of the power transmission tower, and reduces the installation and transportation cost. The power transmission tower can fully utilize the insulating property of the composite cross arm, and a suspension insulator is not hung any more, so that the cost of the insulator is saved, and the call height of the power transmission tower is reduced. The power transmission tower is particularly suitable for the tangent tower of each voltage grade of the main network.
According to the power transmission tower, the composite cross arm is adopted on the side phase, so that a large amount of steel can be saved, the size of the tower head can be reduced, and the width of a corridor can be reduced; the composite cross arm is light and convenient, is easy to machine and form, and can greatly reduce the transportation and assembly cost of the power transmission tower; the composite cross arm has the characteristics of corrosion resistance, high and low temperature resistance, high strength and low possibility of being stolen, and the maintenance cost of the line can be reduced; meanwhile, the color is adjustable, the cable is non-toxic and can be reused after being scrapped, so that the 'environmental friendliness' of the cable is enhanced.
Compared with the conventional angle steel tower, the power transmission tower provided by the invention can reduce the call height and reduce the width of a line corridor. Because the power transmission tower does not need a suspension string, the call height can be reduced by 3m compared with the traditional angle steel tower with the call height of 45m of 500 kV. The power transmission tower has more obvious advantages in the aspect of reducing a line corridor, and compared with a 500kV traditional wine glass type angle steel tower, the width of the corridor can be reduced by 11m and is reduced by 43%; compared with a 500kV wine glass type composite cross arm tower, the corridor width can be reduced by 7m and reduced by 32.4%. In addition, due to the reduction of the ground wire support, the weight of the angle steel of the power transmission tower is lighter than that of a wine cup type composite cross arm tower.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. A transmission tower, comprising:
the tower body comprises a polygonal annular tower head and a tower body for supporting the tower head; the lowermost corner of the tower head is connected to the top of the tower body;
the intermediate phase insulator V string is connected to the tower head in a hanging manner and is positioned in the annular area of the tower head;
the two groups of side phase composite cross arms are respectively positioned at two sides of the tower body; the side phase composite cross arm comprises a line insulator, a post insulator and a metal connecting piece; the ends of the line insulator and the post insulator are connected together through the metal connecting piece; the end of the composite side-phase cross arm is connected to a bifurcated arm and the tower body, the bifurcated arm is the side of the lowermost corner of the tower head, and the composite side-phase cross arm is located in the angular region of the bifurcated arm and the tower body.
2. The transmission tower according to claim 1, wherein the end of the line insulator remote from the metal connector is attached to the furcation arm and the end of the post insulator remote from the metal connector is attached to the tower body.
3. The transmission tower according to claim 2, wherein the post insulator is bolted to the extended plate of the tower body.
4. The transmission tower of claim 2, wherein the line insulator is suspended from the extended plate of the furcation arm by a link fitting.
5. The transmission tower according to claim 1, wherein the end of the line insulator remote from the metal connector is connected to the furcation arm and the end of the post insulator remote from the metal connector is connected to the tower body at the point of connection to the furcation arm.
6. The transmission tower according to claim 1, wherein the number of the post insulators is two, and an angle formed by extension lines of two of the post insulators is 15 ° to 75 °.
7. The transmission tower according to claim 1, wherein the lowermost angle of the tower head is between 30 ° and 120 °.
8. The transmission tower according to claim 1, further comprising ground wire brackets located on both sides of the top end of the tower head.
9. The transmission tower according to claim 1, wherein the mid-phase insulator V-string is comprised of a line composite insulator; the line composite insulator is in a form that a silicon rubber umbrella skirt is coated outside a glass fiber reinforced composite material.
10. The transmission tower according to claim 1, wherein the tower body is constructed from a plurality of angle steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970659.3A CN107587775B (en) | 2017-10-18 | 2017-10-18 | Power transmission tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970659.3A CN107587775B (en) | 2017-10-18 | 2017-10-18 | Power transmission tower |
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| CN107587775A CN107587775A (en) | 2018-01-16 |
| CN107587775B true CN107587775B (en) | 2023-04-07 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691451A (en) * | 2018-07-23 | 2018-10-23 | 中国能源建设集团山西省电力勘测设计院有限公司 | A kind of 500 kilovolts of single time mutually compound cross-arms in electric power pylon side |
| CN108691450A (en) * | 2018-07-23 | 2018-10-23 | 中国能源建设集团山西省电力勘测设计院有限公司 | A kind of 500 kilovolts of single time electric power pylons |
| CN109629899A (en) * | 2018-11-29 | 2019-04-16 | 中国电力科学研究院有限公司 | It is a kind of for exchanging 750kV with the device of four circuit power transmission tower of tower |
| CN110159049A (en) * | 2019-04-26 | 2019-08-23 | 江苏神马电力股份有限公司 | A kind of Y type tower |
| CN110094100A (en) * | 2019-04-28 | 2019-08-06 | 江苏神马电力股份有限公司 | A kind of wineglass tower |
| CN110611280B (en) * | 2019-09-19 | 2021-04-06 | 成都炬能机械制造有限公司 | Power transmission line anti-theft system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201541109U (en) * | 2009-06-30 | 2010-08-04 | 中国电力工程顾问集团公司 | Cathead tangent tower for UHV transmission line |
| CN103452370B (en) * | 2012-10-25 | 2015-12-16 | 江苏神马电力股份有限公司 | Power grid transmission line complex pole tower and compound cross-arm structure thereof |
| CN206128796U (en) * | 2016-08-30 | 2017-04-26 | 国核电力规划设计研究院 | Cat head tangent tower |
| CN207526222U (en) * | 2017-10-18 | 2018-06-22 | 江苏神马电力股份有限公司 | Power transmission tower |
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Effective date of registration: 20201014 Address after: Room 501-2, No.69, Yonghong Road, Minhang District, Shanghai, 201100 Applicant after: Shanghai Shenma Electric Power Engineering Co.,Ltd. Address before: 226017 Jiangsu city of Nantong province Nantong economic and Technological Development Zone Science and Technology Industrial Park of Su Tong Jiang Cheng Road No. 1088 Jiang Park Building 3, room 1467, R & D Applicant before: JIANGSU SHEMAR ELECTRIC Co.,Ltd. |
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