CN220868973U - Single-loop tangent tower of ultrahigh-voltage alternating-current transmission line - Google Patents

Single-loop tangent tower of ultrahigh-voltage alternating-current transmission line Download PDF

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Publication number
CN220868973U
CN220868973U CN202322421475.5U CN202322421475U CN220868973U CN 220868973 U CN220868973 U CN 220868973U CN 202322421475 U CN202322421475 U CN 202322421475U CN 220868973 U CN220868973 U CN 220868973U
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China
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tower
hanging
arm
crank arm
cross arm
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CN202322421475.5U
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高培国
王彦飞
李鑫
夏宇
高汝涛
高经伦
张广玉
李卓
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China Energy Engineering Group Liaoning Electric Power Survey & Design Institute Co ltd
Northeast Electric Power Design Institute of China Power Engineering Consulting Group
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China Energy Engineering Group Liaoning Electric Power Survey & Design Institute Co ltd
Northeast Electric Power Design Institute of China Power Engineering Consulting Group
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Abstract

A single-loop tangent tower of an ultrahigh-voltage alternating-current transmission line consists of a cross arm, a crank arm and a tower body. The cross arms are divided into a middle cross arm and left and right cross arms, and the middle cross arm is provided with two wire hanging points so as to realize the hanging of the V-shaped insulator string of the wires; the left cross arm and the right cross arm have the same functions, each cross arm is provided with two hanging points, the higher hanging point is used for hanging the ground wire, and the lower hanging point is used for hanging the wire and is used for hanging the wire I-shaped insulator string. The crank arm is divided into an upper crank arm and a lower crank arm, which are respectively called as an upper crank arm and a lower crank arm, and is used for transmitting loads such as a ground wire load transmitted by the cross arm rod piece and wind, dead weight and the like borne by the crank arm to the tower body. Compared with the traditional power transmission tower, the tower type power transmission tower not only can realize power transmission safely and reliably, but also can effectively reduce the influence on the original appearance by being used in an environment-sensitive area, and perfect combination of the power transmission tower and the environment is realized.

Description

Single-loop tangent tower of ultrahigh-voltage alternating-current transmission line
Technical Field
The utility model relates to the field of 500kV ultrahigh voltage iron towers, in particular to a 500kV ultrahigh voltage alternating current transmission line engineering single-loop tangent tower.
Background
In the past engineering, a single-loop tangent tower of the 500kV ultrahigh voltage alternating current transmission line engineering adopts a self-supporting iron tower, and the iron tower is used as a supporting point of an overhead transmission line, so that the single-loop tangent tower is an important guarantee for long-distance safe transmission of electric power. Based on factors such as stress, transportation, assembly and the like, the tower head adopts an iron tower form with mature service conditions, such as a wine glass type, a cat head type and the like and rich engineering experience. With further coverage of power grid engineering, the original cup shape and cat head shape can not meet the requirements of improving the power transmission reliability, reducing the influence on the environment and saving the width of a corridor. In order to meet the requirements of local conditions and the numerical mechanical characteristics of the iron tower structure, it is urgent to develop a single-loop iron tower which improves the reliability of power transmission and minimizes the influence of a power transmission line on the environment.
Disclosure of utility model
The utility model aims to provide a 500kV ultrahigh-voltage alternating current single-loop tangent tower which is used for power transmission, has high reliability, reduces the influence on the environment and can save the width of a corridor.
In order to achieve the above purpose, the present utility model provides a single loop tangent tower for an ultra-high voltage ac transmission line, which is characterized in that: the iron tower consists of a cross arm, a crank arm and a tower body, wherein the cross arm is divided into a middle cross arm, a left cross arm and a right cross arm, and the middle cross arm is provided with two wire hanging points to realize the hanging of a wire V-shaped insulator string; the left cross arm and the right cross arm are respectively provided with two hanging points in a ox horn shape, the upper part is a ground wire hanging point for hanging the ground wire, and the lower part is a wire hanging point for hanging the wire I-shaped insulator string.
Further, the crank arm is divided into an upper crank arm and a lower crank arm, which are respectively called as an upper crank arm and a lower crank arm, the included angle between the upper crank arm and the lower crank arm is 131 degrees, and the included angle between the two lower crank arms is 89 degrees, so that the load of the guide wire and the ground wire transmitted by the cross arm rod piece and the load of wind, dead weight and the like borne by the crank arm are transmitted to the tower body.
Further, the width of the ground wire hanging point is 23.1m, the width of the lead hanging point is 26.6m, and the ground wire hanging point is 7.0m higher than the lead hanging point, so that the lightning protection effect is good.
Further, the included angle of the V-shaped insulator string is 90 degrees, compared with a conventional tower type, the wire hanging mode is safer and more reliable, the force transmission of the iron tower is more reasonable, the wind deflection angle is reduced by 8.48 degrees, the influence of wind deflection gaps is effectively reduced, the tower head size is smaller, the tower weight is lighter, the tripping risk is reduced, and the reliability of power transmission is improved.
Compared with the traditional power transmission tower, the utility model has the advantages that the arrangement of the guide wire and the ground wire is more compact, the corridor width can be reduced by about 1m, the structural arrangement is more reasonable, the internal force transmission is clear, the internal force of the rod piece is basically equivalent through numerical mechanical calculation and analysis, the material of the tower is not increased, but the reliability index of the tower can reach 3.7, which is higher than that of a conventional tangent tower such as a cup type tower, a cat head type tower and the like, and the reliability index is higher. The tower type is designed according to all-dimensional long and short legs, is matched with a high foundation and a low foundation for use, can realize zero evolution of the earth and stone of the base surface, and minimizes the damage to the environment.
The tower type power transmission line tower not only saves the width of a corridor and reduces the damage to the environment, but also has the advantages that compared with the traditional engineering, the structural form of the tower type power transmission line tower is more definite in stress, simpler in structure, high in reliability index and attractive in appearance, is an initiative of the domestic ultra-high voltage alternating current power transmission line tower, can realize power transmission safely and reliably, and realizes perfect combination of the power transmission line tower and the environment.
Drawings
Fig. 1 is a schematic diagram of the structure of the present utility model.
In the figure, "1" represents a ground wire hanging point;
In the figure, "2" represents the hanging point of the V-shaped insulator string of the lead;
in the figure, "3" represents the hanging point of the wire "I" type insulator string;
"4" in the figure represents the left insulator string;
"5" in the figure represents the right insulator string;
"6" in the figure represents an "I" type insulator string;
"7" in the figure represents hardware;
in the figure, "8-1" represents the middle cross arm of the iron tower;
"8-2" in the figure represents the side cross arm of the iron tower;
In the figure "9" represents the crank arm of the pylon.
In the figure, "10" represents the body of the pylon.
Detailed Description
The following description of the preferred embodiments of the present utility model is provided for the purpose of illustration and explanation only, and is not intended to limit the utility model thereto.
Referring to fig. 1, the utility model is composed of a symmetrical structure of a cross arm 8, a crank arm 9 and a tower body 10, and all rods are connected by bolts. The cross arm 8 is divided into a middle cross arm 8-1 and an edge cross arm 8-2, and two hanging points of the V-shaped insulator chain are arranged on the middle cross arm to realize hanging of the V-shaped insulator chain of the lead; the side cross arms 8-2 have the same functions, each side cross arm is provided with two hanging points, the higher hanging point is a ground wire hanging point 1 and used for hanging the ground wire, and the lower hanging point is an I-shaped insulator string and used for hanging the I-shaped insulator string of the lead. The crank arm is divided into an upper crank arm and a lower crank arm, which are respectively called as an upper crank arm and a lower crank arm, the included angle between the upper crank arm and the lower crank arm is 131 degrees, and the included angle between the two lower crank arms is 89 degrees, so that the load of the guide wire and the ground wire transmitted by the cross arm rod piece and the load such as wind, dead weight and the like borne by the crank arm are transmitted to the tower body. The ground wire is hung at 1, the symmetrical left and right insulator strings 4 and 5 are assembled into a V-shaped string through the hardware fitting 7, and the V-shaped string and the I-shaped insulator string 6 are respectively hung at the middle cross arm 8-1 and the side cross arm 8-2 under the requirement of meeting the discharge gap of the working conditions of wire power frequency voltage, operation overvoltage, lightning overvoltage and the like. The wires are suspended by means of hardware 7.
The tower-type ground wire hanging point has the width of 23.1m, the wire hanging point has the width of 26.6m, and the ground wire hanging point is 7.0m higher than the wire hanging point, so that the protection angle of the ground wire to the wire is not more than 10 degrees, and the lightning protection effect is good. The medium-phase conductor is hung by adopting the V-shaped insulator string with the included angle of 90 degrees, compared with a conventional tower type, the conductor hanging mode is safer and more reliable, the transmission of force of the iron tower is more reasonable, the wind deflection angle is reduced by 8.48 degrees, the influence of wind deflection gaps is effectively reduced, the size of the tower head is smaller, the tower weight is lighter, the tripping risk is reduced, and the reliability of power transmission is improved.
The overall appearance of the tower head is similar to that of a bull head of a bull, compared with a traditional power transmission tower, the arrangement of the guide wire and the ground wire is more compact, the corridor width can be reduced by about 1m, the structural arrangement is more reasonable, the internal force transmission is clear, the internal force of a rod piece is basically equivalent through numerical mechanical calculation and analysis, the material of the tower is not increased, but the reliability index of the tower can reach 3.7, which is higher than that of a conventional tangent tower such as a wine glass type tower head tower, and the reliability index is higher. The tower type is designed according to all-dimensional long and short legs, is matched with a high foundation and a low foundation for use, can realize zero evolution of the earth and stone of the base surface, and minimizes the damage to the environment.
The tower type is attractive in appearance, saves corridor width, reduces damage to environment, has a more definite structural form than the traditional engineering stress, is simpler in structure, has high reliability index, is an initiative of the domestic ultrahigh-voltage alternating-current transmission line iron tower, can safely and reliably realize power transmission, can effectively reduce influence on original appearance by being used in an environment-sensitive area, and realizes perfect combination of the transmission line iron tower and environment.

Claims (4)

1. The utility model provides an ultra-high voltage alternating current transmission line single loop tangent tower which characterized in that: the iron tower consists of a cross arm, a crank arm and a tower body, wherein the cross arm is divided into a middle cross arm, a left cross arm and a right cross arm, and the middle cross arm is provided with two wire hanging points to realize the hanging of a wire V-shaped insulator string; the left cross arm and the right cross arm are respectively provided with two hanging points in a ox horn shape, the upper part is a ground wire hanging point for hanging the ground wire, and the lower part is a wire hanging point for hanging the wire I-shaped insulator string.
2. The single-loop tangent tower for an ultra-high voltage ac transmission line of claim 1, wherein: the crank arm is divided into an upper crank arm and a lower crank arm, which are respectively called as an upper crank arm and a lower crank arm, the included angle between the upper crank arm and the lower crank arm is 131 degrees, and the included angle between the two lower crank arms is 89 degrees.
3. The single-loop tangent tower for an ultra-high voltage ac transmission line of claim 1, wherein: the width of the ground wire hanging point is 23.1m, the width of the lead hanging point is 26.6m, and the ground wire hanging point is 7.0m higher than the lead hanging point.
4. The single-loop tangent tower for an ultra-high voltage ac transmission line of claim 1, wherein: the included angle of the V-shaped insulator string is 90 degrees.
CN202322421475.5U 2023-09-06 2023-09-06 Single-loop tangent tower of ultrahigh-voltage alternating-current transmission line Active CN220868973U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322421475.5U CN220868973U (en) 2023-09-06 2023-09-06 Single-loop tangent tower of ultrahigh-voltage alternating-current transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322421475.5U CN220868973U (en) 2023-09-06 2023-09-06 Single-loop tangent tower of ultrahigh-voltage alternating-current transmission line

Publications (1)

Publication Number Publication Date
CN220868973U true CN220868973U (en) 2024-04-30

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CN202322421475.5U Active CN220868973U (en) 2023-09-06 2023-09-06 Single-loop tangent tower of ultrahigh-voltage alternating-current transmission line

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CN (1) CN220868973U (en)

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