Double-loop swallow-wing-shaped cross arm iron tower structure

Abstract

The utility model discloses a double-loop swallow-wing type cross arm iron tower structure which comprises a tower body and a tower head, an upper-layer cross arm, a middle-layer cross arm and a lower-layer cross arm are sequentially arranged on the tower head from top to bottom at intervals, and swallow-wing structures are symmetrically arranged at the ends of the upper-layer cross arm, the middle-layer cross arm and the lower-layer cross arm. Hanging points are arranged at the connecting positions of the ends of the swallow-wing structures and the tower head and the cross arms, an insulator string is hung between the two hanging points in a V shape, and the included angle between two wires for hanging the insulator string is 140 degrees. By adopting the swallow-wing-shaped cross arm iron tower, the insulator chain is hung between the swallow-wing structure and the tower head and below the cross arm in a V shape, a stable fixing structure and a safe distance are achieved, the problem that the insulator chain touches the tower body due to windage yaw in areas with strong wind is effectively solved, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model belongs to the field of overhead power transmission line engineering and relates to a double-circuit swallow-wing type cross-arm iron tower structure. Background Art

[0002] With the development of the national economy, the demand for electricity in human life and various infrastructure construction is increasing. Overhead transmission lines are still the mainstream mode of high-voltage power transmission. In areas with heavy wind loads, the wind deflection of insulators is greater for overhead transmission lines, and conventional towers do not take this special situation into consideration, which may cause the insulator string to hit the tower body. Utility Model Content

[0003] The utility model aims to provide a double-circuit swallow-wing type cross-arm iron tower structure to solve the potential safety hazard of insulator strings hitting the tower body due to large wind deviation.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a double-circuit swallow-wing type cross-arm iron tower structure, including a tower body and a tower head, on which an upper cross arm, a middle cross arm and a lower cross arm are arranged in sequence from top to bottom, and the ends of the upper cross arm, the middle cross arm and the lower cross arm are symmetrically provided with swallow-wing structures, and hanging points are respectively provided at the ends of each swallow-wing structure and at the connection between the tower head and each layer of cross arm, and the insulator string is suspended in a V shape between the two hanging points.

[0005] Preferably, the included angle between the two conductors of the suspension insulator string is 140°.

[0006] Preferably, the length of the upper crossarm is 8400mm, the length of the swallow-wing structure connected to the upper crossarm is 1742mm, the bottom end of the swallow-wing structure is flush with the bottom end of the upper crossarm, and the height of the upper crossarm is 1350mm.

[0007] Preferably, the length of the middle crossarm is 9000mm, the length of the swallow-wing structure connected to the middle crossarm is 1948mm, the bottom end of the swallow-wing structure is flush with the bottom end of the middle crossarm, and the height of the middle crossarm is 1450mm.

[0008] Preferably, the length of the above-mentioned lower cross arm is 9600mm, the length of the swallow-wing structure connected to the lower cross arm is 2052mm, the bottom end of the swallow-wing structure is flush with the bottom end of the lower cross arm, and the height of the lower cross arm is 1450mm.

[0009] Preferably, the spacing between the upper crossarm and the middle crossarm is 3050 mm, the spacing between the middle crossarm and the lower crossarm is 3100 mm, and the insulator string is located between the upper crossarm and the middle crossarm, and between the middle crossarm and the lower crossarm.

[0010] Preferably, a ground wire bracket is symmetrically provided at the top of the tower head, and the distance from the end of the ground wire bracket to the center line of the tower head is 3200 mm, and the distance to the upper cross arm is 1500 mm.

[0011] Compared with the prior art, the utility model has the beneficial effect that, by adopting a swallow-wing cross-arm iron tower, the insulator string is suspended in a V-shape between the swallow-wing structure and the tower head and below the cross-arm, which has a stable fixed structure and a safe distance, effectively solving the problem of the insulator string hitting the tower body due to wind deviation in windy areas, and reducing safety hazards. In addition, the swallow-wing cross-arm iron tower can effectively reduce the length and height of the cross-arm, and can also reduce the total height of the tower head, thereby reducing the steel consumption of the iron tower by more than 5%, controlling the investment in the transmission line; compared with ordinary iron towers, the gap is better, and the operation is safer and more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the swallow-wing type cross-arm tower structure. DETAILED DESCRIPTION

[0013] The present invention will be further explained below in conjunction with the accompanying drawings to facilitate better understanding by those skilled in the art.

[0014] Example 1

[0015] like Figure 1 As shown, a double-circuit swallow-wing type cross-arm iron tower structure comprises a tower body and a tower head located above the tower, on which an upper cross-arm 1, a middle cross-arm 2 and a lower cross-arm 3 are sequentially arranged from top to bottom, the center lines of the upper cross-arm 1, the middle cross-arm 2 and the lower cross-arm 3 are coaxial with the center line of the iron tower, and the ends of the upper cross-arm 1, the middle cross-arm 2 and the lower cross-arm 3 are symmetrically provided with swallow-wing structures 4, which are bent outward and downward from the ends of the cross-arms to form a swallow-wing shape with the cross-arms, and hanging points are respectively provided at the ends (bottom ends) of each swallow-wing structure 4 and at the connection between the tower head and each layer of cross-arms, and an insulator string 5 is suspended between the two hanging points in a V shape, and the angle between the two conductors of the suspended insulator string 5 is 140°, so as to ensure a safe distance between the insulator string 5 and the tower body.

[0016] A swallow-wing cross-arm iron tower is adopted, and the insulator string 5 is suspended in a V shape between the swallow-wing structure 4 and the tower head and below the cross-arm. It has a stable fixed structure and a safe distance, which effectively solves the problem of the insulator string hitting the tower body due to wind deviation in windy areas, thereby reducing safety hazards.

[0017] The length of the upper crossarm 1 is 8400mm, the length of the swallow-wing structure 4 connected to the upper crossarm 1 is 1742mm, the bottom of the swallow-wing structure 4 is flush with the bottom of the upper crossarm 1, and the height of the upper crossarm 1 is 1350mm. The length of the middle crossarm 2 is 9000mm, the length of the swallow-wing structure 4 connected to the middle crossarm 2 is 1948mm, the bottom of the swallow-wing structure 4 is flush with the bottom of the middle crossarm 2, and the height of the middle crossarm 2 is 1450mm. The length of the lower crossarm 3 is 9600mm, the length of the swallow-wing structure 4 connected to the lower crossarm 3 is 2052mm, the bottom of the swallow-wing structure 4 is flush with the bottom of the lower crossarm 3, and the height of the lower crossarm 3 is 1450mm. The spacing between the upper cross arm 1 and the middle cross arm 2 is 3050mm, the spacing between the middle cross arm 2 and the lower cross arm 3 is 3100mm, and the insulator string 5 is located between the upper cross arm 1 and the middle cross arm 2, and between the middle cross arm 2 and the lower cross arm 3. The top of the tower head is also symmetrically provided with a ground wire bracket 6, the distance from the end of the ground wire bracket 6 to the center line of the tower head is 3200mm, the distance to the upper cross arm 1 is 1500mm, and the total height of the tower head is 12300mm. Compared with ordinary towers, the swallow-wing cross arm tower has better clearance, safer operation, effectively reduces the length and height of the cross arm, and reduces the total height of the tower head, thereby reducing the steel consumption of the tower by more than 5%, and controlling the investment in transmission lines.

[0018] The above-mentioned embodiments are only for describing the preferred implementation of the utility model, and are not intended to limit the scope of the utility model. Without departing from the design spirit and principle of the utility model, various modifications and improvements made by those skilled in the art to the technical solution of the utility model shall fall within the protection scope determined by the claims of the utility model.

Claims

1. A double-circuit swallow-wing type cross-arm iron tower structure, comprising a tower body and a tower head, characterized in that: An upper cross arm (1), a middle cross arm (2) and a lower cross arm (3) are arranged in sequence from top to bottom on the tower head; the ends of the upper cross arm (1), the middle cross arm (2) and the lower cross arm (3) are symmetrically provided with a swallow-wing structure (4); the ends of each swallow-wing structure (4) and the connection between the tower head and each layer of the cross arm are respectively provided with a hanging point; and the insulator string (5) is suspended in a V shape between the two hanging points.

2. A double-circuit swallow-wing cross-arm tower structure according to claim 1, characterized in that: The included angle between the two conductors of the suspended insulator string (5) is 140°.

3. A double-circuit swallow-wing cross-arm iron tower structure according to claim 1, characterized in that: The length of the upper cross arm (1) is 8400 mm, the length of the swallow-wing structure (4) connected to the upper cross arm (1) is 1742 mm, the bottom end of the swallow-wing structure (4) is flush with the bottom end of the upper cross arm (1), and the height of the upper cross arm (1) is 1350 mm.

4. A double-circuit swallow-wing cross-arm tower structure according to claim 1, characterized in that: The length of the middle cross arm (2) is 9000 mm, the length of the swallow-wing structure (4) connected to the middle cross arm (2) is 1948 mm, the bottom end of the swallow-wing structure (4) is flush with the bottom end of the middle cross arm (2), and the height of the middle cross arm (2) is 1450 mm.

5. A double-circuit swallow-wing cross-arm iron tower structure according to claim 1, characterized in that: The length of the lower cross arm (3) is 9600 mm, the length of the swallow-wing structure (4) connected to the lower cross arm (3) is 2052 mm, the bottom end of the swallow-wing structure (4) is flush with the bottom end of the lower cross arm (3), and the height of the lower cross arm (3) is 1450 mm.

6. A double-circuit swallow-wing cross-arm iron tower structure according to claim 1, characterized in that: The distance between the upper cross arm (1) and the middle cross arm (2) is 3050 mm, the distance between the middle cross arm (2) and the lower cross arm (3) is 3100 mm, and the insulator string (5) is located between the upper cross arm (1) and the middle cross arm (2), and between the middle cross arm (2) and the lower cross arm (3).

7. A double-circuit swallow-wing cross-arm iron tower structure according to claim 1, characterized in that: A ground wire bracket (6) is symmetrically arranged at the top of the tower head. The distance from the end of the ground wire bracket (6) to the center line of the tower head is 3200 mm, and the distance to the upper cross arm (1) is 1500 mm.

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