A double-circuit low tower that can reduce the width of the line corridor

Abstract

The present invention relates to the technical field of power equipment, and discloses a double-circuit low tower capable of reducing the width of a line corridor. The tower comprises a tower body, an upper crossarm, a middle crossarm, and a lower crossarm. A first phase line arranged on the middle crossarm is jumpered through a first upper jumper string, and a second phase line is jumpered through a second upper jumper string. A third phase line arranged on the middle crossarm or the tower body is arranged between the first and second phase lines, and is jumpered through a first middle jumper string. A fourth phase line arranged on the lower crossarm is jumpered through a first lower jumper string, and a fifth phase line is jumpered through a second middle jumper string. A sixth phase line is arranged on the lower crossarm or the tower body, and is arranged between the fourth and fifth phase lines, and is jumpered through a second lower jumper string. The first middle jumper string and the second lower jumper string are arranged on opposite sides of the tower body. The present invention can reduce the height of the tower and narrow the corridor width, thereby saving floor space.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, and in particular to a double-circuit short tower capable of reducing the width of a line corridor. Background Art

[0002] At present, the conductors on the double-circuit towers are generally arranged vertically, and the height of such towers is relatively high. Figure 1 Taking the 500kV double-circuit corner tower shown as an example, the tower head part of the tower using vertical wiring arrangement is as high as 31 meters.

[0003] In areas where tower height is limited, in order to reduce the total height of the double-circuit line tower, the three-phase conductors of the left and right circuits are generally arranged in a triangle shape. Figure 2 The tower head section of the triangular wiring tower shown is approximately 22.5 meters high, 8.5 meters shorter than that of a vertical wiring tower. However, triangular wiring towers generally have longer crossarms. The lower crossarm of a 500kV double-circuit corner tower with triangular wiring reaches 21.1 meters, approximately 10.6 meters longer than the crossarm of a conventional vertically arranged tower. This results in a wider line corridor and a significant increase in the line footprint.

[0004] Therefore, for scenarios where both tower height and corridor width are limited, it is necessary to develop a double-circuit low tower that can reduce the width of the line corridor. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a double-circuit short tower that can reduce the width of the line corridor, which can not only reduce the height of the tower, but also narrow the corridor width and save floor space.

[0006] To solve the above technical problems, the present invention provides a double-circuit short tower capable of reducing the width of a line corridor, comprising a tower body, and upper crossarms, middle crossarms, and lower crossarms arranged on the tower body in sequence from top to bottom, wherein the upper crossarms, the middle crossarms, and the lower crossarms all extend to opposite sides of the tower body;

[0007] The two protruding ends of the upper cross arm are respectively provided with a first upper jumper string and a second upper jumper string, the two protruding ends of the middle cross arm are respectively provided with a first middle jumper string and a second middle jumper string, and the two protruding ends of the lower cross arm are respectively provided with a first lower jumper string and a second lower jumper string;

[0008] The two ends of the middle cross arm are respectively provided with a first phase line and a second phase line, the first phase line is connected by the first upper jumper string, and the second phase line is connected by the second upper jumper string;

[0009] The middle cross arm or the tower body is provided with a third phase line, the third phase line is provided between the first phase line and the second phase line, and the third phase line is connected by the first middle jumper string;

[0010] The fourth phase line and the fifth phase line are respectively provided at the two ends of the lower cross arm. The fourth phase line is connected by the first lower jumper string, and the fifth phase line is connected by the second middle jumper string.

[0011] The lower cross arm or the tower body is provided with a sixth phase line, the sixth phase line is provided between the fourth phase line and the fifth phase line, and the sixth phase line is connected by the second lower jumper string;

[0012] The first middle-layer jumper string and the second lower-layer jumper string are respectively arranged on two opposite sides of the tower body.

[0013] As an improvement of the above-mentioned scheme, the opposite sides of the tower body include a first side and a second side, the first upper jumper string, the first middle jumper string, and the first lower jumper string are all arranged on the first side of the tower body, and the second upper jumper string, the second middle jumper string, and the second lower jumper string are all arranged on the second side of the tower body.

[0014] As an improvement of the above solution, the first phase line, the third phase line and the fourth phase line form a first loop, and the second phase line, the fifth phase line and the sixth phase line form a second loop.

[0015] As an improvement of the above solution, the first phase line, the fourth phase line and the sixth phase line form a first loop, and the second phase line, the third phase line and the fifth phase line form a second loop.

[0016] As an improvement of the above solution, the third phase line is connected to the tower body, and the third phase line is arranged below the middle cross arm, and a preset distance is set between the third phase line and the bottom of the middle cross arm.

[0017] As an improvement to the above solution, the sixth phase line is connected to the tower body, and the sixth phase line is arranged above the lower cross arm.

[0018] As an improvement to the above solution, the top of the upper cross arm is a first horizontal bracket, and the bottom of the upper cross arm includes a first inclined bracket, a second horizontal bracket, and a second inclined bracket. The first inclined bracket, the second horizontal bracket, and the second inclined bracket are connected in sequence. The first inclined bracket is arranged close to the tower body, and the distances between the first inclined bracket, the second inclined bracket, and the first horizontal bracket gradually increase towards the tower body.

[0019] The first upper layer jumper string and the second upper layer jumper string are both arranged at a position where the second inclined bracket is connected to the second horizontal bracket.

[0020] As an improvement to the above-mentioned solution, the protruding ends of the middle crossarm and the lower crossarm are provided with jumper brackets, the bottom of the jumper bracket is provided with a third horizontal bracket, the top of the jumper bracket is provided with a fourth horizontal bracket and a third inclined bracket, the third inclined bracket is provided on the side of the fourth horizontal bracket away from the tower body, and the third horizontal bracket and the third inclined bracket form a preset angle.

[0021] As an improvement to the above solution, a fifth horizontal support is provided on the top of the lower cross arm, and the distance from the bottom of the lower cross arm to the fifth horizontal support gradually increases toward the tower body, and the fourth phase line, the fifth phase line, and the sixth phase line are all connected to the fifth horizontal support;

[0022] Alternatively, the fourth phase line and the fifth phase line are connected to the fourth horizontal bracket of the jumper bracket on the lower cross arm.

[0023] As an improvement of the above-mentioned scheme, the first upper jumper string, the second upper jumper string, the first middle jumper string, the second middle jumper string, the first lower jumper string, and the second lower jumper string are all provided with a rigid tube for connecting to a suspension insulator string, and the suspension insulator string is used to be connected to the upper crossarm, the middle crossarm or the lower crossarm.

[0024] The implementation of the present invention has the following beneficial effects:

[0025] The present invention discloses a double-circuit short tower capable of reducing the width of a line corridor, wherein a first upper layer jumper string and a second upper layer jumper string are respectively arranged at the two protruding ends of the upper cross arm, a first middle layer jumper string and a second middle layer jumper string are respectively arranged at the two protruding ends of the middle cross arm, a first lower layer jumper string and a second lower layer jumper string are respectively arranged at the two protruding ends of the lower cross arm, a first phase line and a second phase line are respectively arranged at the two ends of the middle cross arm, a third phase line located between the first phase line and the second phase line is arranged on the middle cross arm or the tower body, and a fourth phase line is respectively arranged at the two ends of the lower cross arm. line, the fifth phase line, and a sixth phase line located between the fourth and fifth phase lines are arranged on the lower cross arm or the tower body, so that the first phase line is jump-connected through the first upper jumper string, the second phase line is jump-connected through the second upper jumper string, the third phase line is jump-connected through the first middle jumper string, the fourth phase line is jump-connected through the first lower jumper string, the fifth phase line is jump-connected through the second middle jumper string, and the sixth phase line is jump-connected through the second lower jumper string. Only three layers of cross arms need to be arranged on the entire tower body to realize the double-circuit phase lines and the jumper strings that jump the phase lines can maintain a safe distance, thereby greatly reducing the height of the tower body;

[0026] At the same time, two of the phase lines of the double circuit are arranged on the tower body or the cross arm near the middle of the tower body, and the other four phase lines are arranged at both ends of the cross arm, that is, three-phase conductors are arranged on each cross arm, and the two phase lines arranged on the tower body or the cross arm near the middle of the tower body are all jumpered through the jumper string hanging on the cross arm of the same layer, the three phase lines arranged at the end of the cross arm are jumpered through the jumper string hanging on the cross arm of the upper layer, and the other phase line arranged at the end of the cross arm is jumpered through the jumper string hanging on the cross arm of the same layer, so that all phase lines are safely jumpered, which greatly shortens the cross arm length compared with the existing triangle-arranged double circuit tower pole;

[0027] The double-circuit low tower of the present invention can reduce the tower height and the line corridor width, and is particularly suitable for scenarios where both the tower height and the corridor width are limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a conventional vertically arranged double-circuit tower;

[0029] Figure 2 This is a schematic diagram of the structure of a conventional triangular arrangement double-circuit short tower;

[0030] Figure 3 This is a structural diagram of the tower body and cross arms of a double-circuit short tower capable of reducing the width of a line corridor according to the present invention;

[0031] Figure 4 This is a schematic diagram of the phase line layout of a double-circuit short tower that can reduce the width of the line corridor according to the present invention;

[0032] Figure 5 yes Figure 4 Left view of;

[0033] Figure 6 This is a schematic diagram of the structure of the upper cross arm;

[0034] Figure 7 This is a schematic diagram of the structure of the middle cross arm;

[0035] Figure 8 This is a schematic diagram of the structure of the lower cross arm;

[0036] Figure 9 This is a schematic diagram of the first circuit composition;

[0037] Figure 10 This is a schematic diagram of the second circuit composition. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0039] like Figures 3 to 8As shown, the present invention discloses an embodiment of a double-circuit low tower that can reduce the width of the line corridor, comprising a tower body 1, and an upper crossarm 2, a middle crossarm 3, and a lower crossarm 4 arranged on the tower body 1 from top to bottom. The upper crossarm 2, the middle crossarm 3, and the lower crossarm 4 are arranged in parallel and extend to opposite sides of the tower body 1. In this embodiment, the upper crossarm 2, the middle crossarm 3, and the lower crossarm 4 preferably pass through opposite sides of the tower body 1 and are fixedly connected to the tower body 1. In this embodiment, a ground wire is arranged on the upper crossarm 2, and double-circuit phase wires are arranged on the middle crossarm 3 and the lower crossarm 4. The jumper strings arranged on the upper crossarm 2, the middle crossarm 3, and the lower crossarm 4 realize the jumper connection of each phase wire of the double circuit.

[0040] Among them, the two protruding ends of the upper crossarm 2 are respectively provided with a first upper jumper string 51 and a second upper jumper string 52, and the first upper jumper string 51 and the second upper jumper string 52 are located between the upper crossarm 2 and the middle crossarm 3; the two protruding ends of the middle crossarm 3 are respectively provided with a first middle jumper string 53 and a second middle jumper string 54, and the first middle jumper string 53 and the second middle jumper string 54 are located between the middle crossarm 3 and the lower crossarm 4; the two protruding ends of the lower crossarm 4 are respectively provided with a first lower jumper string 55 and a second lower jumper string 56, and the first lower jumper string 55 and the second lower jumper string 56 are located below the lower crossarm 4 and keep a safe distance from the ground.

[0041] The two ends of the middle crossarm 3 are respectively provided with a first phase line a and a second phase line b, and the first phase line a and the second phase line b are connected to the middle crossarm 3 through a tension insulator string. The first phase line a is jumpered by the first upper jumper string 51, and the second phase line b is jumpered by the second upper jumper string 52. The middle crossarm 3 or the tower body 1 is provided with a third phase line c, and the third phase line c is arranged between the first phase line a and the second phase line b. The third phase line c is connected to the middle crossarm 3 or the tower body 1 through a tension insulator string, and the third phase line c is jumpered by the first middle jumper string 53. The fourth phase line d and the fifth phase line e are respectively provided at the two ends of the lower cross arm 4. The fourth phase line d and the fifth phase line e are both connected to the lower cross arm 4 through a tension insulator string. The fourth phase line d is jumpered by the first lower jumper string 55, and the fifth phase line e is jumpered by the second middle jumper string 54; the lower cross arm 4 or the tower body 1 is provided with a sixth phase line f, and the sixth phase line f is provided between the fourth phase line d and the fifth phase line e. The sixth phase line f is connected to the lower cross arm 4 or the tower body 1 through a tension insulator string, and the sixth phase line f is jumpered by the second lower jumper string 56.

[0042] The first middle layer jumper string 53 and the second lower layer jumper string 56 are respectively arranged on two opposite sides of the tower body 1 to ensure that a sufficient safety distance is maintained between the jumper strings in the layout.

[0043] In this embodiment, the first upper layer jumper string 51 and the second upper layer jumper string 52 are respectively provided at the two protruding ends of the upper cross arm 2, the first middle layer jumper string 53 and the second middle layer jumper string 54 are respectively provided at the two protruding ends of the middle cross arm 3, the first lower layer jumper string 55 and the second lower layer jumper string 56 are respectively provided at the two protruding ends of the lower cross arm 4, the first phase line a and the second phase line b are respectively provided at the two ends of the middle cross arm 3, and the first phase line a is provided at the middle cross arm 3 or the tower body 1. , and the third phase line c between the second phase line b, and the fourth phase line d and the fifth phase line e are respectively set at the two ends of the lower cross arm 4, and the sixth phase line f is set between the fourth phase line d and the fifth phase line e on the lower cross arm 4 or the tower body 1, so that the first phase line a is jumped through the first upper jumper string 51, the second phase line b is jumped through the second upper jumper string 52, the third phase line c is jumped through the first middle jumper string 53, the fourth phase line d is jumped through the first lower jumper string 55, and the fifth phase line e is jumped through. The second middle layer jumper string 54 is jumped through, so that the sixth phase line f is jumped through through the second lower layer jumper string 56. Only three layers of cross arms are required on the entire tower body 1 to realize that the phase lines of the double circuit and the jumper strings that jump through the phase lines can maintain a safe distance, which greatly reduces the height of the tower body 1. At the same time, two of the phase lines of the double circuit are arranged on the tower body 1 or the cross arm is close to the middle of the tower body 1, and the other four phase lines are arranged at both ends of the cross arm, that is, three-phase conductors are arranged on each layer of cross arm, and are arranged on the tower body 1 or the cross arm is close to the tower body The two phase lines in the middle position are both jumpered through the jumper string suspended on the crossarm of the same layer. The three phase lines arranged at the end of the crossarm are jumpered through the jumper string suspended on the crossarm of the upper layer. The other phase line arranged at the end of the crossarm is jumpered through the jumper string suspended on the crossarm of the same layer, thereby achieving safe jumpering of all phase lines. Compared with the existing triangular arrangement of double-circuit tower poles, the crossarm length is greatly shortened. The double-circuit low tower of this embodiment can reduce the tower height and the line corridor width, and is particularly suitable for scenarios where both the tower height and the corridor width are limited.

[0044] Of the first, second, third, fourth, fifth, and sixth phases a, b, and c that form a double circuit, each phase c, d, and f are tripped through a jumper string hung on the crossarm on their own level, while the first, second, and fifth phases e are tripped through a jumper string hung on the crossarm on the previous level. That is, the third and sixth phases c and f, located in the middle, are both tripped through a jumper string hung on the crossarm on their own level.

[0045] To facilitate description and identification of the relative positions of each jumper string, this embodiment refers to the two opposite sides of the tower body 1 as the first side and the second side. The first upper jumper string 51, the first middle jumper string 53, and the first lower jumper string 55 are all located on the first side of the tower body 1, and the second upper jumper string 52, the second middle jumper string 54, and the second lower jumper string 56 are all located on the second side of the tower body 1. Each jumper string includes a jumper wire and a suspension insulator string connected to the crossarm. The jumper wire passes through the suspension insulator string to jump the phase line between the large and small sides of the tower body 1.

[0046] Because Figure 1 The conventional tower pole loop phase lines shown are all arranged vertically. Figure 2 The loop phase lines on the tower are arranged in a triangle. In order to facilitate the wiring of the double-circuit short tower of the present invention with conventional towers in front and behind, or towers with existing triangle wiring, the first phase line a, the third phase line c and the fourth phase line d can form a first loop, and the second phase line b, the fifth phase line e and the sixth phase line f can form a second loop (as shown in FIG. Figure 9 or the first phase line a, the fourth phase line d and the sixth phase line f form a first loop, and the second phase line b, the third phase line c and the fifth phase line e form a second loop (as shown); Figure 10 shown).

[0047] Preferably, in this embodiment, the third phase line c is connected to the tower body 1 , and the third phase line c is arranged below the middle cross arm 3 , and a preset distance is set between the third phase line c and the bottom of the middle cross arm 3 .

[0048] In this embodiment, the third phase line c is arranged at a position 1.1-1.8 m below the lower plane of the middle cross arm 3 to increase the distance between the first middle jumper string 53 for jumping the third phase line c and the tower body 1 .

[0049] The sixth phase line f can be installed on the tower body 1 or on the lower cross arm 4. In this embodiment, the sixth phase line f is preferably connected to the tower body 1 and installed above the lower cross arm 4 to increase the distance between the second lower jumper string 56 and the ground and the tower body 1.

[0050] Unlike conventional crossarms with ground wires, the upper crossarm 2 of this embodiment not only connects to the ground wire but also requires a jumper string for phase line jumpers. The top of the upper crossarm 2 of this embodiment is a first horizontal bracket 21, and the bottom of the upper crossarm 2 includes a first inclined bracket 22, a second horizontal bracket 23, and a second inclined bracket 24. The first inclined bracket 22, the second horizontal bracket 23, and the second inclined bracket 24 are connected in sequence. The first inclined bracket 22 is located near the tower body 1, and the distances between the first inclined bracket 22, the second inclined bracket 24, and the first horizontal bracket 21 gradually increase as they approach the tower body 1. In addition to providing traction for the ground wire and the jumper string and having good wind load resistance, the upper crossarm 2 of this structure also has a first upper jumper string 51 and a second upper jumper string 52 located at the location where the second inclined bracket 24 connects to the second horizontal bracket 23, which increases the safe distance between the first upper jumper string 51 and the second upper jumper string 52 and the upper crossarm 2. In this embodiment, the ground wires are arranged on the upper cross arm 2 , and one of the ground wires is located on the side of the first upper jumper string 51 away from the tower body 1 , and the other ground wire is located on the side of the second upper jumper string 52 away from the tower body 1 .

[0051] It should be noted that the inclined bracket described in this embodiment refers to a bracket on the cross arm that has a certain slope with the horizontal plane.

[0052] Combine Figure 7 and Figure 8 In this embodiment, the extended ends of the middle crossarm 3 and the lower crossarm 4 are preferably provided with jumper brackets 6. A third horizontal bracket 61 is provided at the bottom of the jumper bracket 6, and a fourth horizontal bracket 62 and a third inclined bracket 63 are provided at the top of the jumper bracket 6. The end of the jumper bracket 6 away from the tower body 1 is provided with a jumper hole for connecting to a jumper string. The third inclined bracket 63 is provided on the side of the fourth horizontal bracket 62 away from the tower body 1. The angle between the third horizontal bracket 61 and the third inclined bracket 63 is 15-45 degrees, forming a pointed bird's beak-like shape at the ends of the middle crossarm 3 and the lower crossarm 4. This increases the distance between the jumper and the tower body 1 while ensuring the stability of the crossarm structure.

[0053] A fifth horizontal bracket 41 is provided at the top of the lower crossarm 4. The distance from the bottom of the lower crossarm 4 to the fifth horizontal bracket 41 gradually increases toward the tower body 1, i.e., the lower crossarm 4 is configured in an inverted triangle shape. The fifth horizontal bracket 41 of the lower crossarm 4 is flush with the top surface of the fourth horizontal bracket 62 on the top of the jumper bracket 6. The fourth phase line d, the fifth phase line e, and the sixth phase line f are all connected to the fifth horizontal bracket 41, or the fourth phase line d and the fifth phase line e are connected to the fourth horizontal bracket 62 of the jumper bracket 6 on the lower crossarm 4. This structure of the lower crossarm 4 and its connection to the phase lines increases the distance of the phase lines arranged on the lower crossarm 4 from the ground by approximately 1 meter, helping to shorten the overall height of the tower.

[0054] The first upper jumper string 51, the second upper jumper string 52, the first middle jumper string 53, the second middle jumper string 54, the first lower jumper string 55, and the second lower jumper string 56 are all equipped with a rigid tube 50 for connecting to the suspension insulator string. The rigid tube 50 can be a steel pipe, etc., and is installed outside the jumper to reduce the deformation of the jumper and improve the electrical safety of the jumper. The suspension insulator string is used to connect to the upper crossarm 2, the middle crossarm 3, or the lower crossarm 4. For a 500KV double-circuit low tower, the length of the rigid tube 50 of the first upper jumper string 51, the second upper jumper string 52, and the second middle jumper string 54 is set to no less than 12m to increase the electrical distance between the jumper and the crossarm on the same layer. At the same time, to avoid excessive deflection, the jumpers for the phase lines on both sides of the tower body 1 in this embodiment are preferably arranged in a figure-eight shape.

[0055] The above disclosure is only a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A double-circuit short tower capable of reducing the width of a line corridor, characterized in that: The tower comprises a tower body, and an upper cross arm, a middle cross arm, and a lower cross arm arranged in sequence from top to bottom on the tower body, wherein the upper cross arm, the middle cross arm, and the lower cross arm all extend to opposite sides of the tower body; The two protruding ends of the upper cross arm are respectively provided with a first upper jumper string and a second upper jumper string, the two protruding ends of the middle cross arm are respectively provided with a first middle jumper string and a second middle jumper string, and the two protruding ends of the lower cross arm are respectively provided with a first lower jumper string and a second lower jumper string; The two ends of the middle cross arm are respectively provided with a first phase line and a second phase line, the first phase line is connected by the first upper jumper string, and the second phase line is connected by the second upper jumper string; The middle cross arm or the tower body is provided with a third phase line, the third phase line is provided between the first phase line and the second phase line, and the third phase line is connected by the first middle jumper string; The fourth phase line and the fifth phase line are respectively provided at the two ends of the lower cross arm. The fourth phase line is connected by the first lower jumper string, and the fifth phase line is connected by the second middle jumper string. The lower cross arm or the tower body is provided with a sixth phase line, the sixth phase line is provided between the fourth phase line and the fifth phase line, and the sixth phase line is connected by the second lower jumper string; The first middle-layer jumper string and the second lower-layer jumper string are respectively arranged on two opposite sides of the tower body.

2. The double-circuit short tower capable of reducing the width of the line corridor according to claim 1, characterized in that: The opposite sides of the tower body include a first side and a second side, the first upper jumper string, the first middle jumper string, and the first lower jumper string are all arranged on the first side of the tower body, and the second upper jumper string, the second middle jumper string, and the second lower jumper string are all arranged on the second side of the tower body.

3. The double-circuit short tower capable of reducing the width of the line corridor according to claim 2, characterized in that: The first phase line, the third phase line, and the fourth phase line form a first loop, and the second phase line, the fifth phase line, and the sixth phase line form a second loop.

4. The double-circuit short tower capable of reducing the width of the line corridor according to claim 2, characterized in that: The first phase line, the fourth phase line, and the sixth phase line form a first loop, and the second phase line, the third phase line, and the fifth phase line form a second loop.

5. The double-circuit short tower capable of reducing the width of the line corridor according to claim 1 or 2, characterized in that: The third phase line is connected to the tower body and is arranged below the middle cross arm. A preset distance is set between the third phase line and the bottom of the middle cross arm.

6. The double-circuit short tower capable of reducing the width of the line corridor according to claim 1 or 2, characterized in that: The sixth phase line is connected to the tower body, and the sixth phase line is arranged above the lower cross arm.

7. The double-circuit short tower capable of reducing the width of the line corridor according to claim 1 or 2, characterized in that: The top of the upper cross arm is provided with a first horizontal bracket, and the bottom of the upper cross arm includes a first inclined bracket, a second horizontal bracket, and a second inclined bracket, the first inclined bracket, the second horizontal bracket, and the second inclined bracket are connected in sequence, the first inclined bracket is arranged close to the tower body, and the distances between the first inclined bracket, the second inclined bracket and the first horizontal bracket gradually increase towards the direction close to the tower body; The first upper layer jumper string and the second upper layer jumper string are both arranged at a position where the second inclined bracket is connected to the second horizontal bracket.

8. The double-circuit short tower capable of reducing the width of the line corridor as claimed in claim 1, characterized in that: The protruding ends of the middle cross arm and the lower cross arm are both provided with jumper brackets, the bottom of the jumper bracket is provided with a third horizontal bracket, the top of the jumper bracket is provided with a fourth horizontal bracket and a third inclined bracket, the third inclined bracket is provided on the side of the fourth horizontal bracket away from the tower body, and the third horizontal bracket and the third inclined bracket form a preset angle.

9. The double-circuit short tower capable of reducing the width of the line corridor according to claim 8, characterized in that: A fifth horizontal support is provided on the top of the lower cross arm, and the distance from the bottom of the lower cross arm to the fifth horizontal support gradually increases toward the tower body, and the fourth phase line, the fifth phase line, and the sixth phase line are all connected to the fifth horizontal support; Alternatively, the fourth phase line and the fifth phase line are connected to the fourth horizontal bracket of the jumper bracket on the lower cross arm.

10. The double-circuit short tower capable of reducing the width of the line corridor according to claim 1, characterized in that: The first upper jumper string, the second upper jumper string, the first middle jumper string, the second middle jumper string, the first lower jumper string, and the second lower jumper string are all provided with rigid tubes for connecting to suspension insulator strings, and the suspension insulator strings are used to be connected to the upper crossarm, the middle crossarm or the lower crossarm.

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