750kv angle tower of composite jumper support

Abstract

The utility model discloses a 750kV line corner tower of composite jumper support relates to electric power corner tower technical field, the end of the inner angle side ground wire cross arm of corner tower is connected with support, and the first composite jumper support is installed to the lower end of support, the first composite jumper support bottom is connected with the first composite jumper support jumper string, and the inner angle side wire cross arm end has second strain string hanging hole, and the second strain string hanging hole lower part installs second composite jumper support, and the second composite jumper support bottom is connected with second composite jumper support jumper string, and the outer angle side wire cross arm end has third strain string hanging hole, and the third strain string hanging hole lower part installs third composite jumper support, and the third composite jumper support bottom is connected third composite jumper support jumper string, the utility model discloses installing composite jumper support under corner tower cross arm, replaces the composite insulator in jumper string, solves the problem of heavy weight of jumper string and easy swing.

Description

Technical Field

[0001] This utility model relates to the field of power angle tower technology, specifically a 750 kV angle tower with a composite jumper bracket. Background Technology

[0002] 750 kV AC transmission lines are ultra-high voltage AC transmission lines with high voltage levels and wide application in my country. 750 kV single-circuit angle towers use a T-shaped design, and jumper strings are generally squirrel-cage rigid jumper strings, connected to the tower crossarm via insulator strings or to the conductor tension series plate via tie rods. The flexible jumper wires of the front tension string are connected to the rear tension string via spacers on a steel pipe, and the swing amplitude is controlled by counterweights installed on the steel pipe. The steel pipe length of the jumper string is generally 11m to 13m, produced in three sections in the factory and then assembled on-site. The jumper string (including the upper composite insulator and counterweights) generally weighs 990kg to 1570kg. Such a heavy jumper string not only makes on-site construction and installation difficult, but also makes it prone to tripping due to swinging during strong winds or extreme weather. Utility Model Content

[0003] This invention overcomes the shortcomings of the prior art and proposes a 750 kV corner tower with a composite jumper bracket; solving the problems of heavy jumper strings and easy swinging.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] A 750 kV angle tower with a composite jumper bracket includes a lower tower body and an upper tower body. One side of the top of the upper tower body is connected to the outer corner ground wire crossarm, and the other side of the top of the upper tower body is connected to the inner corner ground wire crossarm. One side of the lower part of the upper tower body is connected to the inner corner conductor crossarm, and the other side of the lower part of the upper tower body is connected to the outer corner conductor crossarm. A bracket is connected to the end of the inner corner ground wire crossarm, and a first composite jumper bracket is installed at the lower end of the bracket. A first composite jumper bracket jumper string is connected to the bottom of the first composite jumper bracket. The end of the inner corner conductor crossarm has a second tension stringing hole, and a second composite jumper bracket is installed below the second tension stringing hole, with a second composite jumper bracket jumper string connected to the bottom of the second composite jumper bracket. The end of the outer corner conductor crossarm has a third tension stringing hole, and a third composite jumper bracket is installed below the third tension stringing hole, with a third composite jumper bracket jumper string connected to the bottom of the third composite jumper bracket.

[0006] Furthermore, the upper tower body has a first tension string hole in the middle.

[0007] Furthermore, a grounding wire string is installed at the hanging point of the grounding wire crossarm on the outer corner side.

[0008] Furthermore, the grounding wire string is installed at the hanging point of the inner corner side grounding wire crossarm.

[0009] Furthermore, the first composite jumper bracket, the second composite jumper bracket, and the third composite jumper bracket all have the same structure, including two parallel vertical rods and multiple horizontal rods connected between the two vertical rods, all of which are made of insulating material.

[0010] The beneficial effects of this utility model compared to the prior art are as follows:

[0011] This invention involves installing a composite jumper bracket under the crossarm of an angle tower, replacing the composite insulator in the jumper string. This reduces the length of the jumper string from 8.4m to 1.1m, significantly decreasing the swing amplitude and eliminating the need for counterweights. The weight of the jumper string can be reduced by 370kg to 810kg. This reduces line tripping caused by jumper string swing, facilitating on-site installation and post-commissioning line maintenance.

[0012] After installing composite jumper brackets, the length of the middle-phase jumper bracket can be reduced by approximately 3.8 meters, and the weight of the tower can be reduced by approximately 220 kg. With the reduced length of the middle-phase jumper bracket, regardless of whether it's a small or large bend, only one hanging hole needs to be installed for the ground wire on the inner corner, optimizing and standardizing the wiring process. From a life-cycle cost perspective, this improves the operational level of the line while reducing the investment cost and extending the overall service life of the transmission line. Attached Figure Description

[0013] Figure 1 This is a front view of the 750 kV corner tower of the composite jumper bracket described in this utility model;

[0014] Figure 2 This is a side view of the first composite patch cord bracket;

[0015] Figure 3 This is a side view of the second composite patch cord bracket;

[0016] Figure 4 This is a side view of the third composite patch cord bracket;

[0017] Figure 5 This is a diagram of the jumper hardware stringing (middle phase) of a composite jumper bracket;

[0018] Figure 6 yes Figure 5 Side view of the jumper string of the first composite jumper bracket;

[0019] Figure 7 This is a diagram of the jumper hardware string (side phase) of the composite jumper bracket;

[0020] Figure 8 yes Figure 7 Side view of the second composite jumper bracket jumper string or the third composite jumper bracket jumper string.

[0021] Figure label:

[0022] 1. Lower tower body; 2. Upper tower body; 3. First tension string hanging hole; 4. Inner corner side ground wire crossarm; 5. Inner corner side ground wire crossarm hanging point; 6. Support; 7. Outer corner side ground wire crossarm hanging point; 8. Outer corner side ground wire crossarm; 9. Inner corner side conductor crossarm; 10. Second tension string hanging hole; 11. Outer corner side conductor crossarm; 12. Third tension string hanging hole; 13. First composite jumper support; 14. First composite jumper support jumper string; 15. Second composite jumper support; 16. Second composite jumper support jumper string; 17. Third composite jumper support; 18. Third composite jumper support jumper string; 19. Middle phase tension string; 20. Wire clamp; 21. Side phase tension string. Detailed Implementation

[0023] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it. The technical solution of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0024] See Figures 1 to 8 This embodiment proposes a 750 kV line corner tower with a composite jumper bracket, including a lower tower body 1 and an upper tower body 2; one side of the top of the upper tower body 2 is connected to the outer corner side ground wire crossarm 8, and a ground wire string is installed at the outer corner side ground wire crossarm hanging point 7 of the outer corner side ground wire crossarm 8; the other side of the top of the upper tower body 2 is connected to the inner corner side ground wire crossarm 4, and a ground wire string is installed at the inner corner side ground wire crossarm hanging point 5 of the inner corner side ground wire crossarm 4; a bracket 6 is connected to the end of the inner corner side ground wire crossarm 4, and a first composite jumper bracket 13 is installed at the lower end of the bracket 6; a first composite jumper bracket jumper string 14 is connected to the bottom of the first composite jumper bracket 13.

[0025] The upper tower body 2 has a first tension string hanging hole 3 in the middle; the middle phase tension string 19 is symmetrically arranged on the large and small sides. After the jumper wire is led out from the end of the clamp 20 of the middle phase tension string 19 on the small side, it is led to the middle phase tension string 19 on the large side through the jumper wire string 14 of the first composite jumper bracket, thus completing the installation of the middle phase jumper wire.

[0026] The lower side of the upper tower body 2 is connected to the inner corner side conductor crossarm 9. The end of the inner corner side conductor crossarm 9 has a second tension string hanging hole 10. A second composite jumper bracket 15 is installed below the second tension string hanging hole 10. The bottom of the second composite jumper bracket 15 is connected to a second composite jumper bracket jumper string 16. Inner corner jumper installation: The side phase tension strings 21 are symmetrically arranged on the large and small sides. The jumper is led out from the end of the clamp 20 of the small side phase tension string 21, passes through the second composite jumper bracket jumper string 16, and is then led to the large side phase tension string 21, completing the installation of the inner corner side jumper.

[0027] The lower part of the upper tower body 2 is connected to the outer corner side conductor crossarm 11. The end of the outer corner side conductor crossarm 11 has a third tension string hanging hole 12. The lower part of the third tension string hanging hole 12 is equipped with a third composite jumper bracket 17. The bottom of the third composite jumper bracket 17 is connected to the third composite jumper bracket jumper string 18. The outer corner jumper is implemented as follows: the side phase tension strings 21 are symmetrically arranged on the large and small sides. After the jumper is led out from the end of the clamp 20 of the small side side phase tension string 21, it is led through the third composite jumper bracket jumper string 18 and then connected to the large side tension string 21 to complete the installation of the outer corner side jumper.

[0028] The first composite jumper bracket 13, the second composite jumper bracket 15, and the third composite jumper bracket 17 all have the same structure, including two parallel vertical rods and multiple horizontal rods connected between the two vertical rods, all of which are made of insulating material.

[0029] This invention involves installing a composite jumper bracket under the crossarm of an angle tower, replacing the composite insulator in the jumper string. This reduces the length of the jumper string from 8.4m to 1.1m, significantly decreasing the swing amplitude and eliminating the need for counterweights. The weight of the jumper string can be reduced by 370kg to 810kg. This reduces line tripping caused by jumper string swing and facilitates on-site installation and post-commissioning line maintenance. After installing the composite jumper bracket, the length of the middle-phase jumper bracket can be reduced by approximately 3.8m, and the tower weight by approximately 220kg. With the reduced length of the middle-phase jumper bracket, only one hanging hole is needed for the inner corner ground wire, regardless of whether the angle is small or large, optimizing and standardizing the stringing process. From a life-cycle cost perspective, this improves line operation while reducing investment costs and extending the overall service life of the transmission line.

[0030] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. It should not be considered that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered to fall within the scope of patent protection determined by the submitted claims.

Claims

1. A 750 kV angle tower with a composite jumper bracket, comprising a lower tower body (1) and an upper tower body (2); one side of the top of the upper tower body (2) is connected to an outer corner side ground wire crossarm (8), and the other side of the top of the upper tower body (2) is connected to an inner corner side ground wire crossarm (4); one side of the lower part of the upper tower body (2) is connected to an inner corner side conductor crossarm (9), and the other side of the lower part of the upper tower body (2) is connected to an outer corner side conductor crossarm (11); characterized in that, The end of the inner corner side ground wire crossarm (4) is connected to a bracket (6), and a first composite jumper bracket (13) is installed at the lower end of the bracket (6); the bottom of the first composite jumper bracket (13) is connected to a first composite jumper bracket jumper string (14); the end of the inner corner side conductor crossarm (9) has a second tension string hanging hole (10), the lower part of the second tension string hanging hole (10) is installed with a second composite jumper bracket (15), the bottom of the second composite jumper bracket (15) is connected to a second composite jumper bracket jumper string (16); the end of the outer corner side conductor crossarm (11) has a third tension string hanging hole (12), the lower part of the third tension string hanging hole (12) is installed with a third composite jumper bracket (17), the bottom of the third composite jumper bracket (17) is connected to a third composite jumper bracket jumper string (18).

2. A 750 kV corner tower with a composite jumper bracket according to claim 1, characterized in that, The upper tower body (2) has a first tension string hanging hole (3) in the middle.

3. A 750 kV corner tower with a composite jumper bracket according to claim 1, characterized in that, Install the grounding string at the hanging point (7) of the grounding crossarm (8) on the outer corner side.

4. A 750 kV corner tower with a composite jumper bracket according to claim 1, characterized in that, The grounding string is installed at the hanging point (5) of the inner corner side grounding crossarm (4).

5. A 750 kV corner tower with a composite jumper bracket according to claim 1, characterized in that, The first composite jumper bracket (13), the second composite jumper bracket (15), and the third composite jumper bracket (17) all have the same structure, including two parallel vertical rods and multiple horizontal rods connected between the two vertical rods, all of which are made of insulating material.

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