CN104763208A - 110kV dual-loop novel butterfly-shaped penetrating and spanning tower in high-altitude area - Google Patents

Abstract

The invention discloses a 110kV double-circuit new butterfly drilling tower in a high-altitude area, including a tower body, and a ground wire cross arm, an upper wire cross arm and a middle and lower wire cross arm connected to the tower body from top to bottom, and the ground wire The wire cross-arm, the upper wire cross-arm and the middle and lower wire cross-arm are distributed symmetrically along the vertical central axis of the tower body, and the two ends of the ground wire cross-arm are provided with ground wire hanging points, and the upper ground wire hanging points of the ground wire cross-arm are provided with upper Double-angle steel is used for jumper wires, the upper wire hanging points are set at both ends of the upper wire cross arm, the middle phase wire hanging points are set at both ends of the middle and lower wire cross arms, and the lower phase wires are set between the upper end point of the lower wire cross arm and the tower body Hanging point, and set the double angle steel for the middle wire jumper at the hanging point of the middle phase wire, set the double angle steel for the lower wire jumper at the hanging point of the lower phase wire, the hanging point of the upper wire, the hanging point of the middle phase wire and the lower phase wire The hanging points of the wires are distributed in a triangle. It has the advantages of wide application in the field, low height of the pole tower structure, simple installation and construction, convenient maintenance and good structural safety.

Description

110kV double circuit new butterfly drilling tower in high altitude area

technical field

The invention relates to the field of power transmission line equipment, in particular to a novel butterfly-shaped drilling tower with a double circuit of 110kV in high altitude areas.

Background technique

With the progress of my country's western development, the construction of power transmission grids in high-altitude areas in western my country has made great progress. There will inevitably be many crossovers between different voltage levels or between the same voltage levels, especially the widespread application of 110kV transmission lines. Sexuality, there will be 110kV transmission lines drilling through 110kV, 220kV and 500kV transmission lines.

At present, most of the new 110kV transmission lines are based on double circuits on the same tower, and the tower structure mainly adopts umbrella or drum structure. The umbrella-shaped or drum-shaped pole tower structure is equipped with four layers of cross-arms, including ground wire cross-arms, upper wire cross-arms, middle wire cross-arms, and lower wire cross-arms from top to bottom. Due to the layout of the vertically arranged ground wires, the tower head of the tower structure is relatively high, and it is often very difficult to drill through the transmission line. Therefore, measures such as bypassing 110kV transmission lines, partial transformation of double circuits into single circuits, or transformation of original line towers are usually adopted, resulting in complicated line technical schemes, difficult construction, high investment costs, convenient operation and maintenance, and even power outage construction.

Contents of the invention

The purpose of the present invention is to solve the above problems and propose a new type of 110kV double-circuit butterfly drilling tower in high-altitude areas, so as to realize wide application in the field, low tower structure height, simple installation and construction, convenient maintenance and good structural safety advantage.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A 110kV double-circuit new butterfly drilling tower in high-altitude areas, including a tower body, and a ground wire cross arm, an upper wire cross arm, and a middle and lower wire cross arm connected to the tower body from top to bottom. The pole, the upper wire cross arm and the middle and lower wire cross arm are symmetrically distributed along the vertical central axis of the tower body. The two ends of the ground wire cross arm are provided with ground wire hanging points, and the ground wire hanging points on the ground wire cross arm are Set the double angle steel for the upper conductor jumper, set the upper conductor hanging point at both ends of the upper conductor cross arm, set the middle phase conductor hanging point at both ends of the middle and lower conductor cross arm, and set the upper end point of the lower conductor cross arm and the tower body Set the hanging point of the lower phase wire between them, and set the double angle steel for the middle wire jumper at the hanging point of the middle phase wire, set the double angle steel for the lower wire jumper at the hanging point of the lower phase wire, the hanging point of the upper wire, the middle phase The hanging points of the wires and the hanging points of the lower phase wires are distributed in a triangle.

Preferably, the cross-arm of the ground wire and the cross-arm of the upper wire adopt a coplanar superimposed structure, and the cross-arm of the ground wire and the cross-arm of the upper wire are of an integral structure.

Preferably, the distance between the hanging point of the middle phase wire and the vertical central axis of the tower body is 3500mm, the distance between the hanging point of the lower phase wire and the hanging point of the middle phase wire is 4300mm, and the hanging point of the upper wire and the vertical axis of the tower body The distance to the central axis is 4300 mm, and the distance between the ground wire hanging point and the vertical central axis of the tower is 6800 mm.

Preferably, the vertical distance between the hanging point of the lower phase wire and the bottom of the tower body is 12m, the vertical distance between the hanging point of the lower phase wire and the hanging point of the upper wire is 3.8m, and the hanging point of the upper wire and the hanging point of the ground wire The vertical spacing is 2.3m.

The technical solution of the present invention has the following beneficial effects:

The technical scheme of the present invention adopts a new butterfly-shaped tower structure with three-phase conductors arranged in a triangle, and by effectively reducing the height of the tower hanging point structure, thereby reducing the height of the ground wire and conductors, and realizing that the transmission line meets the electrical safety clearance requirements of the high-voltage line. It has good drilling performance. It has the advantages of wide application in the field, low height of the tower structure, simple installation and construction, convenient maintenance and good structural safety.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a structural schematic diagram of a 110kV double-circuit novel butterfly drilling tower described in an embodiment of the present invention;

Fig. 2 is a schematic diagram of the side view structure of the 110kV double-circuit new butterfly drilling tower shown in Fig. 1;

Fig. 3 is a top view structural diagram of the 110kV double-circuit new butterfly drilling tower shown in Fig. 1 in the high-altitude area.

In conjunction with the accompanying drawings, the reference signs in the embodiments of the present invention are as follows:

1: Hanging point of the ground wire; 2: Hanging point of the upper wire; 3: Hanging point of the middle phase wire; 4: Hanging point of the lower phase wire; 6: Tower body; 7: Cross arm of the ground wire; 8: Cross arm of the upper wire; 9: Middle and lower wire cross arm; 10: ground wire; 11: upper wire; 12: middle and lower wire; 13: jumper insulator string; 14: wire insulator string; 15: jumper; 16: lower wire; 17: middle wire; 18: double-angle steel for upper conductor jumper; 19: double-angle steel for lower conductor jumper; 20: double-angle steel for middle conductor jumper.

Detailed ways

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

As shown in Figure 1, Figure 2 and Figure 3, a 110kV double-circuit new butterfly drilling tower in high altitude areas, including the tower body 6, and the ground wire crossarm 7 connected to the tower body 6 from top to bottom, the upper Conductor crossarm 8 and middle and lower conductor crossarm 9, ground wire crossarm 6, upper conductor crossarm 7 and middle and lower conductor crossarm 9 are symmetrically distributed along the vertical central axis of the tower body, and ground wire crossarm 7 is arranged at both ends. Line hanging point 1, and double angle steel 18 for upper wire jumper is set at the upper ground wire hanging point of the ground wire cross arm, the upper wire hanging point 2 is set at both ends of the upper wire cross arm 8, and the two ends of the middle and lower wire cross arm 9 Set the hanging point 3 of the middle phase wire, set the hanging point 4 of the lower phase wire between the upper end point of the crossarm of the lower wire and the tower body, and set the double angle steel 20 for the middle wire jumper at the hanging point 3 of the middle phase wire, and hang the lower phase wire Point 4 is provided with double angle steel 19 for the lower wire jumper, and the upper wire hanging point 2, the middle phase wire hanging point 3 and the lower phase wire hanging point 4 are distributed in a triangle. The dotted line in Fig. 1 is the vertical central axis.

The ground wire cross arm 7, the upper wire cross arm 8 and the middle and lower wire cross arm 9 are tower body truss structures composed of angle steel. The partition of the tower body adopts a rectangular or square form, and the tower body is arranged with a ground wire cross arm 7, an upper wire cross arm 8 and a middle and lower wire cross arm 9 from top to bottom.

The drill-through tower of this technical solution is planned to have a minimum height of 12m according to the distance between the wires and the ground in high-altitude areas, and the three-phase wires of the transmission line are arranged in a triangle, which effectively reduces the structural height of the tower. The cross-arm of the ground wire and the cross-arm of the upper wire are superimposed and connected to the structure of the tower body, effectively reducing the height of the ground wire frame.

The jumper jumper of the drilling tower in this technical scheme adopts the form of a hanging jumper string, and the hanging point of the jumper string of the upper wire is located on the double angle steel for the jumper of the upper wire set on the cross arm of the ground wire, which effectively ensures that the gap between the jumper wires is stable to the tower structure. electrical spacing. The hanging point position of the middle phase wire and the hanging point position of the lower phase wire are directly set with double angle steel for jumper hanging point.

Wherein, the ground wire cross arm 7 and the upper wire cross arm 8 adopt a coplanar superimposed structure, and the ground wire cross arm 7 and the upper wire cross arm 8 are of an integrated structure.

The distance between the hanging point 3 of the middle phase conductor and the vertical central axis of the tower body is 3500mm, the distance between the hanging point 4 of the lower phase conductor and the hanging point of the middle phase conductor is 4300mm, and the distance between the hanging point 2 of the upper conductor and the vertical central axis of the tower body is 4300mm, the distance between the ground wire hanging point 1 and the vertical central axis of the tower body is 6800 mm.

The vertical distance between the hanging point 4 of the lower phase conductor and the bottom of the tower body is 12m, the vertical distance between the hanging point 4 of the lower phase conductor and the hanging point 2 of the upper conductor is 3.8m, and the vertical distance between the hanging point 2 of the upper conductor and the hanging point 1 of the ground wire is 2.3m.

The ground wire cross arm 7 and the upper wire cross arm 8 of the drilling tower adopt a superimposed arrangement, and they are jointly connected to the tower body 6 structure to effectively reduce the height of the ground wire frame. The cross arm ground wire cross arm 7 and the upper wire cross arm 8 are coplanar design, Reduce the bending of the structure after welding, and make the structure more concise and reasonable.

The position S4 of the hanging point 4 of the middle phase conductor is determined as 3500mm according to the jumper gap circle; the position S3 of the hanging point 3 of the lower phase conductor is determined as 4300mm according to the distance between the conductors; the position S3 of the hanging point 2 of the upper conductor is determined according to the jumper gap circle and the ground wire The effective protection range of the upper wire is determined to be 4300 mm; the position S1 of the ground wire hanging point 1 is determined to be 6800 mm according to the -10° protection angle of the ground wire 10 to the lower wire 16.

According to the minimum ground-to-ground distance of transmission line conductors in high-altitude areas, the drill-through tower design minimum height H1 is 12m; the vertical phase-to-phase distance H2 of conductors is 3.8m, and the effective protection distance of ground wires to upper conductors is designed to be 2.3m. .

This technical solution is designed according to the planning and design of high-altitude areas, and is suitable for areas with an altitude of 1500m~2500m. All-round tower legs can be designed according to the site conditions of the tower position. Good security and other advantages.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still The technical solutions recorded in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (4)

1. the novel butterfly in 110kV double loop, a high altitude localities bores more tower, it is characterized in that, comprise tower body, and the ground wire cross-arm be connected with tower body from top to bottom, upper conductor cross-arm and middle lower wire cross-arm, described ground wire cross-arm, upper conductor cross-arm and middle lower wire cross-arm symmetrical along the vertical axis of tower body, the two ends of described ground wire cross-arm arrange ground wire hanging point, and ground wire hanging point place arranges upper conductor wire jumper double angle on described ground wire cross-arm, the two ends of described upper conductor cross-arm arrange upper conductor hanging point, the two ends of described middle lower wire cross-arm arrange middle phase conductor hanging point, lower phase conductor hanging point is set between lower wire cross-arm upper extreme point and tower body, and in middle phase conductor hanging point place is arranged wire wire jumper double angle, at lower phase conductor hanging point place, lower wire wire jumper double angle is set, described upper conductor hanging point, middle phase conductor hanging point and lower phase conductor hanging point are in triangular distribution.

2. the novel butterfly in 110kV double loop, high altitude localities according to claim 1 bores more tower, and it is characterized in that, described ground wire cross-arm and upper conductor cross-arm adopt coplanar iterative structure, and ground wire cross-arm and upper conductor cross-arm are structure as a whole.

3. the novel butterfly in 110kV double loop, high altitude localities according to claim 1 and 2 bores more tower, it is characterized in that, the spacing of described middle phase conductor hanging point and the vertical axis of tower body is 3500mm, the spacing of described lower phase conductor hanging point and middle phase conductor hanging point is 4300mm, the spacing of described upper conductor hanging point and the vertical axis of tower body is 4300mm, and the spacing of described ground wire hanging point and the vertical axis of tower body is 6800 mm.

4. the novel butterfly in 110kV double loop, high altitude localities according to claim 1 and 2 bores more tower, it is characterized in that, vertical interval bottom described lower phase conductor hanging point and tower body is 12m, the vertical interval of described lower phase conductor hanging point and upper conductor hanging point is 3.8m, and the vertical interval of described upper conductor hanging point and ground wire hanging point is 2.3m.