CN204899376U - 330kV alternating current transmission 40's-60 two return circuits of X type angle tower - Google Patents

Abstract

The utility model discloses an X-type double-circuit corner tower with a 330kV AC power transmission of 40° to 60°, which comprises a tower body, a ground wire crossarm arranged on the top of the tower body, and a ground wire crossarm arranged sequentially from top to bottom. The upper conductor crossarm, the middle conductor crossarm and the lower conductor crossarm; the upper conductor crossarm, the middle conductor crossarm and the lower conductor crossarm are all connected to the tower body; the upper conductor crossarm, the middle conductor crossarm and the lower conductor crossarm The load includes two branches, which are respectively arranged on both sides of the lower part of the tower body. The lengths of the two branches are not equal. "The cross arm of the tower is shortened by about 2.0m, which can reduce the width of the line corridor, shorten the floor space, reduce the overall height of the iron tower, and reduce its weight. erection requirements.

Description

330kV AC transmission 40°～60° X-type double-circuit corner tower

technical field

The utility model relates to a high-voltage iron tower, in particular to an X-type double-circuit corner tower with a 330kV AC power transmission of 40° to 60°.

Background technique

In the existing technology, the design of 330kV voltage level double-circuit corner iron tower is more common, and the application is more, and the design technology is relatively mature. However, the existing 330kV voltage level double-circuit iron tower is heavy and expensive, especially in areas with severely restricted corridors. Traditional The double-circuit iron tower cannot be implemented.

Utility model content

The purpose of this utility model is to overcome the problems and deficiencies in the above-mentioned prior art, and provide an X-type double-circuit corner tower with a 330kV AC power transmission of 40° to 60°. The tower is light in weight, low in cost, and the required corridor width Smaller, able to meet the requirements for 330kV AC transmission lines.

In order to achieve the above object, the technical solution adopted by the utility model is:

It includes the tower body, the ground wire cross arm set on the top of the tower body for suspending the ground wire, and the upper wire cross arm, the middle wire cross arm and the middle wire cross arm arranged under the ground wire cross arm for suspending two-phase power transmission wires in sequence from top to bottom. The lower conductor cross arm; the upper conductor cross arm, the middle conductor cross arm and the lower conductor cross arm are all connected to the tower body, and the conductor cross arm includes two branches arranged on both sides of the lower part of the tower body. The lengths of the branches are not equal, and a jumper cross-arm is set on one side of the cross-arm of the middle conductor; There are ground wire hanging points on the top, wire hanging points on both sides of the upper and lower wire cross arms, and wire hanging points on the middle wire cross arm at the end of the cross arm.

The top opening width of the ground cross arm is 1/3 of the size of the connection with the tower body, the top opening widths on both sides of the upper conductor cross arm and the lower conductor cross arm are 1.8m and 1.2m respectively, and the middle conductor cross arm The top opening widths on both sides are 2.0m and 1.2m respectively, and the jumper crossarm is set on the outer corner side of the middle conductor crossarm, and the top opening width of the jumper crossarm is 1.6m.

The end of the jumper cross arm is provided with a jumper hole for adding a jumper.

The hanging point of the ground wire and the hanging point of the wire are both hanging board type hanging points.

The ground wire hanging point is set on the upper plane of the ground wire cross arm, and the distance between the hanging points on both sides and the central axis is 10.5m and 8.3m respectively;

The hanging points of the conductors on both sides of the upper conductor cross arm are respectively set at 9.0m and 6.8m from the center of the tower body;

The hanging points of the conductors on both sides of the cross arm of the lower conductor are respectively set at 9.0m and 7.0m from the center of the tower body;

The hanging points of the conductors on both sides of the center conductor cross arm are respectively set at 6.5m and 4.5m from the center of the tower body;

The jumper hole is 1.5m away from the wire hanging point of the middle wire cross arm.

The tower body has a slope change under the cross arm of the lower conductor; the distance between the slope change and the connection between the cross arm of the lower conductor and the tower body is 4.5m.

The total length of the ground wire cross-arm is 18.8m, the root height of the connection between the ground wire cross-arm and the tower body is 3.0m, the cross-arm end of the ground wire cross-arm is pointed, and the included angles on both sides are 18°, 23°;

The total length of the upper conductor cross arm is 15.8m, the height of the root of the connection between the upper conductor cross arm and the tower body is 3.0m, the end of the upper conductor cross arm is pointed, and the included angles on both sides are 21° and 28° respectively ;

The total length of the cross-arm of the medium conductor is 12.5m, and the cross-arm of jumper on one side is 1.5m. The included angles of the sides are 28° and 42°;

The total length of the cross arm of the down conductor is 16.0m, the root height of the connection between the cross arm of the down conductor and the tower body is 2.8m, the end of the cross arm of the down conductor is pointed, and the included angles on both sides are 21° and 28° respectively.

The layer spacing between the ground wire cross-arm and the upper wire cross-arm is 6.0m; the layer spacing between the upper wire cross-arm and the middle wire cross-arm is 9.5m; the middle wire cross-arm and the lower wire cross-arm The spacing is 9.0m.

The tower body is made of Q420 high-strength steel.

The transmission wires are all connected to the tower body with single-connected double-string fittings.

Compared with the prior art, the utility model has the following beneficial effects: in the structural arrangement of the iron tower, by shortening the cross-arm of the middle conductor and adding jumper cross-arms on both sides, the cross-arm of the middle conductor can be compared with the conventional "drum type". "The shortened tower reduces the corridor width of the line, compresses the corridor width, and reduces the amount of demolition in the transmission line project. At the same time, it avoids large-scale felling of trees and protects the ecological environment. Under the condition of satisfying the gap, the layer spacing is shortened by 2.0m It can reduce the overall height of the iron tower and reduce its weight by about 5.0%. To sum up, the application of this new type of iron tower can not only reduce the cost of the iron tower, but also effectively save space, and can meet the line erection requirements in severely restricted areas of the corridor.

Further, the wire hanging points of the utility model are respectively arranged at the bottom of the upper wire cross arm, the middle wire cross arm and the lower wire cross arm. Mechanical performance, to meet the requirements of the strength of the hanging wire node.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram one of tower leg structure of the present utility model;

Fig. 3 is a schematic diagram of tower leg structure II of the utility model;

Among them, 1. The tower body; 2. The ground wire cross arm; 3. The upper wire cross arm; 4. The middle wire cross arm; 5. The lower wire cross arm; ; 9, short tower legs; 10, long tower legs.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Referring to Fig. 1, the utility model structurally comprises a tower body 1, a ground wire cross arm 2 arranged on the top of the tower body 1 for suspending the ground wire, and a ground wire cross arm 2 sequentially arranged below the ground wire cross arm 2 from top to bottom. The upper conductor crossarm 3, the middle conductor crossarm 4 and the lower conductor crossarm 5 for suspending the two-phase transmission conductor;

The upper conductor cross arm 3, the middle conductor cross arm 4 and the lower conductor cross arm 5 all include two branches, which are arranged on the left and right sides of the lower part of the tower head of the tower body 1, but the left and right cross arms are not equal in length;

The length of the cross-arm 4 of the medium conductor is 2.0m lower than that of the conventional "drum-shaped" tower, which reduces the width of the line corridor by about 3.0m, compresses the width of the corridor, reduces the amount of demolition in the transmission line project, and avoids the destruction of trees. Large-scale felling protects the ecological environment, and a jumper crossarm is added on the left side of the middle conductor crossarm 4.

The ground wire cross arm 2 is arranged on the top of the tower body 1, and its bottom shape is trapezoidal, and the top opening width of the ground wire cross arm is about 1/3 of the size of the connection with the tower body, and extends horizontally to the left and right sides of the tower head. The ground wire hanging point is set on the upper plane of the ground wire cross arm 2, and the left and right sides are respectively 10.5m and 8.3m away from the central axis. , The ground wire protects the two circuits.

The upper conductor cross arm 3 is located below the ground conductor cross arm 2. The upper conductor cross arm 3 includes two branches, which are respectively located on the left and right sides of the lower part of the tower head. , and extend horizontally to the left and right sides of the tower head. The upper wire cross arm 3 is used to suspend two-phase power transmission wires and meet the requirements of electrical clearance. The total length of the upper conductor cross arm 3 is 15.8m, and the hanging points of the left and right conductors are respectively 9.0m and 6.8m away from the center of the tower body.

The middle conductor cross arm 4 is located below the upper conductor cross arm 3 . The center conductor cross arm 4 includes two branches, which are respectively located on the left and right sides of the lower part of the tower head and extend horizontally to the left and right sides of the tower head. 2.0m, 1.2m, the top opening width of jumper cross arm is 1.6m. The middle wire cross arm 4 is used to suspend the two-phase power transmission wire and meet the requirements of the electrical clearance. The total length of the middle conductor cross arm is 12.5m, of which the jumper cross arm is 1.5m, the left and right conductor hanging points are 6.5m and 4.5m away from the center of the tower body, and the jumper hole is 1.5m away from the conductor hanging point.

The lower conductor cross arm 5 is located below the middle conductor cross arm 4 . The lower conductor cross arm 5 includes two branches, which are respectively located on the left and right sides of the lower part of the tower head. The lower wire cross arm 5 is used to suspend the two-phase power transmission wires and meet the requirements of electrical clearance. The total length of the lower conductor cross arm 5 is 16.0m, and the left and right hanging points are respectively 6.5m and 4.5m from the center of the tower body.

The layer spacing between the ground wire crossarm and the upper conductor crossarm is 6.0m; the layer spacing between the upper conductor crossarm and the middle conductor crossarm is 9.5m; the distance between the middle conductor crossarm and the lower conductor crossarm is 9.0m.

The power transmission wires of the utility model are all connected to the tower body 1 by single-connected double-string fittings, and the distance between the double strings is 0.4m. The four hanging points are connected with the fittings, the structure layout is reasonable, and the force transmission is clear, which ensures the safe operation of the project.

The ground wire hanging point of the corner tower of the utility model is set on the top of the ground wire cross arm 2, and the wire hanging points are respectively set on the bottom of the upper wire cross arm 3, the middle wire cross arm 4 and the lower wire cross arm 5, and the hanging points are all in the form of hanging boards. , so as to avoid welding work, effectively strengthen the mechanical performance of the hanging point, and meet various requirements such as the strength of the hanging line node.

The distance between the slope change point 6 of the tower body 1 and the connection point 7 between the lower conductor cross arm 5 and the tower body 1 is 4.5m. Reasonable selection of the slope change point 6 can effectively save materials, and is convenient for processing and installation.

The main material of the tower body 1 is Q420 high-strength steel, and the rigidity of the main material changes according to the law from top to bottom, minimizing welding, facilitating construction and reducing tower weight.

Referring to Fig. 2 to Fig. 3, the bottom of the tower body 1 is connected with tower legs, and the tower legs are tower legs 8, short tower legs 9 or long tower legs 10, so as to adapt to different landforms. As for the lightning protection of towers, it should not be greater than 0° protection as required by the code, and further optimized to a negative protection angle.

The corner tower of the utility model, in the structural layout of the iron tower, shortens the cross-arm of the middle conductor and increases the cross-arm of the jumper, which is about 2.0m shorter than the conventional "drum-shaped" tower, which can shorten the floor space and reduce the width of the line corridor. The overall height is reduced to reduce its weight, which not only reduces the cost of the tower, but also effectively saves space, which can meet the line erection requirements in severely restricted areas of the corridor. The "hyperbolic" layout of the tower adopts a "hyperbolic" layout. The line cross arm can reduce the width of the line corridor, reduce the floor space, and reduce the overall height of the tower, thereby reducing the cost.

Claims (10)

1. an X-type double loop angle tower for 330kV ac transmission 40 ° ~ 60 °, is characterized in that: comprise tower body (1), be arranged on tower body (1) top for hanging the ground wire cross-arm (2) of ground wire and being successively set on ground wire cross-arm (2) below from top to down for hanging the upper conductor cross-arm (3) of two-phase transmission pressure, middle wire cross-arm (4) and lower wire cross-arm (5); Described upper conductor cross-arm (3), middle wire cross-arm (4) and lower wire cross-arm (5) are all connected with tower body (1), wire cross-arm includes the Liang Ge branch being arranged on both sides, tower body (1) tower head bottom, not etc., the side of middle wire cross-arm (4) does not arrange wire jumper cross-arm for two branch length; Described ground wire cross-arm (2), upper conductor cross-arm (3), middle wire cross-arm (4) and lower wire cross-arm (5) bottom shape are trapezoidal, ground wire cross-arm (2) top is provided with ground wire hanging point, upper conductor cross-arm (3) and lower wire cross-arm (5) two side bottom all arrange conducting wire hanging point, and middle wire cross-arm (4) arranges conducting wire hanging point at cross arm end.

2. the X-type double loop angle tower of 330kV ac transmission according to claim 1 40 ° ~ 60 °, it is characterized in that: the top opening of described ground wire cross-arm (2) is wide is and 1/3 of tower body (1) junction size, the top opening of upper conductor cross-arm (3) and lower wire cross-arm (5) both sides is wide is respectively 1.8m, 1.2m, the top opening of middle wire cross-arm (4) both sides is wide is respectively 2.0m, 1.2m, and wire jumper cross-arm is arranged on middle wire cross-arm (4) side, exterior angle, the wide 1.6m of wire jumper cross-arm top opening.

3. the X-type double loop angle tower of 330kV ac transmission according to claim 1 40 ° ~ 60 °, is characterized in that: described wire jumper cross arm end is provided with the jumper hole for increasing wire jumper.

4. the X-type double loop angle tower of 330kV ac transmission according to claim 3 40 ° ~ 60 °, is characterized in that: described ground wire hanging point and conducting wire hanging point are link plate type hanging point.

5. the X-type double loop angle tower of 330kV ac transmission according to claim 3 40 ° ~ 60 °, is characterized in that: described ground wire hanging point is arranged on the upper plane of ground wire cross-arm (2), and both sides hanging point is respectively 10.5m, 8.3m apart from axis;

The both sides conducting wire hanging point of upper conductor cross-arm (3) is separately positioned on apart from 9.0m, 6.8m place, tower body (1) center;

The both sides conducting wire hanging point of lower wire cross-arm (5) is separately positioned on apart from 9.0m, 7.0m place, tower body (1) center;

The both sides conducting wire hanging point of middle wire cross-arm (4) is separately positioned on apart from 6.5m, 4.5m place, tower body (1) center;

The conducting wire hanging point 1.5m of wire cross-arm (4) in jumper hole distance.

6. the X-type double loop angle tower of 330kV ac transmission according to claim 1 40 ° ~ 60 °, is characterized in that: described tower body (1) is formed in lower wire cross-arm (5) below and becomes slope place (6); Becoming slope place (6) apart from lower wire cross-arm (5) and tower body (1) junction (7) is 4.5m.

7. the X-type double loop angle tower of 330kV ac transmission according to claim 1 40 ° ~ 60 °, it is characterized in that: the overall length of described ground wire cross-arm (2) is 18.8m, ground wire cross-arm (2) and tower body (1) junction root height are 3.0m, the cross-arm termination of ground wire cross-arm (2) is pointed, and the angle of both sides is respectively 18 °, 23 °;

The overall length of upper conductor cross-arm (3) is 15.8m, upper conductor cross-arm (3) and tower body (1) junction root height are 3.0m, the cross-arm termination of upper conductor cross-arm (3) is pointed, and the angle of both sides is respectively 21 °, 28 °;

Middle wire cross-arm (4) overall length is 12.5m, wherein the wire jumper cross-arm of side is 1.5m, middle wire cross-arm (4) and tower body (1) junction root height are 2.7m, the cross-arm termination of middle wire cross-arm (4) is pointed, and the angle of both sides is 28 °, 42 °;

Lower wire cross-arm (5) overall length is 16.0m, lower wire cross-arm (5) and tower body (1) junction root height are 2.8m, the cross-arm termination of lower wire cross-arm (5) is pointed, and the angle of both sides is respectively 21 °, 28 °.

8. the X-type double loop angle tower of 330kV ac transmission according to claim 1 40 ° ~ 60 °, is characterized in that: the interlamellar spacing between described ground wire cross-arm (2) and upper conductor cross-arm (3) is 6.0m; Interlamellar spacing between upper conductor cross-arm (3) and middle wire cross-arm (4) is 9.5m; Spacing between middle wire cross-arm (4) and lower wire cross-arm (5) is 9.0m.

9. the X-type double loop angle tower of 330kV ac transmission according to claim 1 40 ° ~ 60 °, is characterized in that: described tower body (1) is the tower body adopting Q420 high-strength steel to make.

10. the X-type double loop angle tower of 330kV ac transmission according to claim 1 40 ° ~ 60 °, is characterized in that: transmission pressure all adopts simply connected two string gold utensil to be connected with tower body (1).