CN102383639A - Compactly structured pole tower - Google Patents

Abstract

The invention provides a pole tower with a compact structure, which includes a tower body, a wire cross arm and a ground wire cross arm. side, which is characterized in that: the wire cross arms on both sides of the tower are arranged in a staggered manner. Because the wire cross arms on both sides of the tower are arranged in a staggered manner, the horizontal length of the wire cross arms installed on the left and right sides of the tower can be shortened under the premise of meeting the safety distance between the wires, that is, the adjacent wires on the left and right sides of the tower body and the wires The distance between projections to the ground becomes smaller, the width of the required power corridor is reduced, and the land occupied by the power line corridor is saved; at the same time, the horizontal length of the conductor cross-arm is shortened, which also saves materials. The invention is particularly suitable for popularization and application on transmission lines with a voltage level of 110kV and above.

Description

Compact Structure Tower

technical field

The invention relates to a pole tower of a power transmission line, in particular to a pole tower with a compact structure.

Background technique

Towers are important equipment for transmission lines. my country's current 110kV and above voltage level transmission lines mostly use iron towers. The same-phase conductors of conventional double-circuit towers are located at the same level. In this way, the air gap between the two conductors is the horizontal distance between the two conductors.

The horizontal distance between two conductors at the same horizontal height on the transmission line tower directly affects the width of the transmission line corridor. Under certain weather conditions, the air gap of 110kV and above voltage transmission lines must reach a certain safety distance to ensure that the air between the two conductors will not be broken down. However, the same-phase conductors of conventional double-circuit towers are located at the same level, and the transmission line corridor has a large width and occupies a large area.

Patent No. 200420025908.X is a 220 kV four-circuit iron tower structure, which mainly uses four circuits. It is characterized in that the three-phase conductors of the same circuit are arranged vertically, and the conductors of different circuits are arranged horizontally on the cross arm. The four circuits are respectively hung Three or four lightning protection wires are hung on the three cross arms. The utility model has a simple and compact structure and reasonable arrangement; it can make full use of the space and reduce the construction cost.

But, the patent No. is 200420025908.X a kind of 220 kV four-circuit iron tower structure, the wire cross arm that determines the width of the transmission line corridor is still at the same level, can only reduce the height of the pole tower, and cannot shorten the wire cross arm The length, that is, the area occupied by the transmission line corridor cannot be saved.

my country's rapidly developing economy has an increasing demand for electricity. With the rapid growth of transmission line construction, due to the land occupation of power corridors, the cost of land acquisition and house demolition during the construction of power lines has increased year by year. Therefore, how to reduce power It is of great significance to the construction and development of my country's transmission lines to increase the width of the corridor and save the area occupied by the line corridor.

Contents of the invention

The object of the present invention is to provide a compact structure pole tower, which can reduce the width of the power corridor and save the land occupied by the power line corridor.

In order to achieve the above object, the compact structure pole tower of the present invention includes a tower body, a wire cross arm and a ground wire cross arm. The two sides of the tower body are characterized in that: the wire cross arms on both sides of the tower are arranged in a staggered manner.

Because the wire cross arms on both sides of the tower are arranged in a staggered manner, the horizontal length of the wire cross arms installed on the left and right sides of the tower can be shortened under the premise of meeting the safety distance between the wires, that is, the adjacent wires on the left and right sides of the tower body and the wires The distance between projections to the ground becomes smaller, the width of the required power corridor is reduced, and the land occupied by the power line corridor is saved; at the same time, the horizontal length of the conductor cross-arm is shortened, which also saves materials.

The pole tower with a compact structure is characterized in that: the included angle between the line connecting the suspension points of the wires on the cross arms of the two adjacent wires on the left and right and the tower body is 10° to 80°. If the angle between the suspension point of the two adjacent conductors on the cross arm and the tower body is too large, the reduced width of the power corridor will be small; if the angle is too small, the width of the reduced power corridor will be large, but the minimum In the case of the height above the ground, the height of the tower body will increase more.

The compact structure pole tower is characterized in that the tower body is made of composite materials. The use of composite materials can ensure that the safety requirements can still be met after the length of the cross arm is reduced.

The compact structure pole tower is characterized in that a silicone rubber shed is installed on the outer wall of the tower between the wire cross arms and between the wire cross arms and the ground wire cross arms. Install the silicone rubber umbrella skirt to ensure that the creepage distance can still meet the safety requirements after the length of the cross arm is reduced.

The compact structure pole tower of the present invention can reduce the width of the power corridor and save the occupied area of the power line corridor by using the compact structure pole tower.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the present invention.

Detailed ways

Description of the marks in Figure 1: ground wire cross arm 1, ground wire 2, wire 3, tower body 4, wire cross arm 5, and silicone rubber shed 6.

Referring to Fig. 1, the embodiment of compact structure pole tower of the present invention comprises tower body 4, wire cross arm 5 and ground wire cross arm 1, and ground wire cross arm 1 is installed on tower body 4 tops, and wire cross arm 5 is on the ground wire cross arm 1, the wire cross arm 5 is installed on both sides of the tower body 4, the wire cross arms 5 on both sides of the tower are arranged in a staggered manner, the ground wire 2 is suspended at both ends of the ground wire cross arm 1, and the wire 3 is suspended at the wire at the outer end of the wire cross arm 5 on the hanging point.

Because the wire cross arms 5 on both sides of the tower are arranged in a staggered manner, under the premise of satisfying the safety distance between the wires 3, the horizontal length of the wire cross arms 5 installed on the left and right sides of the tower can be shortened, that is, the left and right sides of the tower body 4 are aligned with each other. The distance between the adjacent wires 3 and the projection of the wires 3 to the ground becomes smaller, the required width of the power corridor is reduced, and the land occupied by the line corridor is saved; at the same time, the horizontal length of the wire cross arm 5 is shortened, which also saves materials.

The embodiment is a 110kV transmission line with a double-circuit composite material pole tower on the same tower. The tower body 4 is made of composite materials. The air gap distance D1 between the wire 2 and the electrodes of the upper right phase conductor 3 = 4.7m, the air gap distance between the ground wire 2 and the electrodes of the upper left phase conductor 3 D2 = 3m, the horizontal distance B of the conductors 3 on both sides of the tower body 4 = 3m, phase The vertical air gap distance C1=3.5m, the air gap distance C2=3.5m of the same-phase conductor 3. With this scheme, the gap distance between towers meets the design requirements of 110kV lines, and can meet the operation requirements of 110kV lines in terms of electrical performance. The horizontal projected spacing of conductors is reduced from 3.5m to 3m, reducing the width of line corridors.

If the angle between the connection line of the suspension points of the conductors 3 on the left and right adjacent cross-arms 5 and the tower body 4 is too large, the width of the reduced power corridor is small; if the angle is too small, the width of the reduced power corridor is large, but Under the condition that the minimum height above the ground is guaranteed, the height of the tower body 4 can be increased a lot.

In the embodiment, silicone rubber sheds 6 are installed on the outer wall of the tower body 4 between the wire cross arms 5 and between the wire cross arms 5 and the ground wire cross arms 1 . Install the silicone rubber umbrella skirt 6 to ensure that the creepage distance can still meet the safety requirements after the length of the cross arm is reduced.

The use of the compact structure pole tower of the invention can reduce the width of the power corridor and save the land occupied by the power line corridor. The promotion and application of the compact structure pole tower of the present invention has positive significance for reducing land acquisition, saving land resources and reducing the cost of transmission lines, and is especially suitable for popularization and application on transmission lines with voltage levels of 110kV and above.

Claims (4)

1. Compact structure pole tower, including tower body, wire cross arm and ground wire cross arm. It is characterized in that the wire cross arms on both sides of the tower are arranged in a staggered manner. 2. The pole tower with a compact structure according to claim 2, characterized in that: the angle between the line connecting the suspension points of the wires on the cross arm of the two adjacent wires on the left and right and the tower body is 10o to 80o. 3. The compact structure pole tower according to claim 2, characterized in that: the tower body is made of composite materials. 4. The compact structure pole tower according to claim 2, characterized in that: silicone rubber sheds are installed on the outer wall of the tower between the wire cross arms and between the wire cross arms and the ground wire cross arms.

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