CN203846844U - Double-circuit line joint use coordinated transposition post tower - Google Patents

Abstract

The utility model discloses a double-circuit line joint use coordinated transposition post tower which comprises a tower body. The double-circuit line joint use coordinated transposition post tower is characterized in that one side of the upper end of the tower body is provided with a first group of three-layer cross arms, the other side of the upper end of the tower body is provided with a second group of three-layer cross arms, and the distance between an upper layer of the second group of three-layer cross arms and a lower layer of the first group of three-layer cross arms is 4500-6000 mm. The double-circuit line joint use coordinated transposition post tower is safe in structure and low in fabricating cost; due to the facts that cable cross spanning is no longer adopted and a four-base-tower direct spanning is no longer adopted either, the engineering cost can be effectively reduced during double-circuit line joint use cross spanning and is a half of ordinary design engineering cost, and an occupied space is small.

Description

Erection of cross-transposition towers on the same pole for double-circuit lines

technical field

The utility model relates to an improvement of a pole tower of a double-circuit line, in particular to a cross-transposition pole tower erected on the same pole of a double-circuit line.

Background technique

At this stage, with the development of the economy, the national infrastructure power construction and high-voltage power grid have also developed rapidly. The power grid dotted across the land is interspersed, and the line corridors are becoming more and more tense. There are more and more double-circuit and multi-circuit lines on the same tower. For double-circuit lines on the same tower, due to the influence of scheduling, the erection of double-circuit lines on the same tower needs to be cross-transferred. The currently used double-circuit line pole tower, including the tower body, is provided with a first group of three-layer cross-arms on one side of the upper end of the tower body, and a second group of three-layer cross-arms is provided on the other side of the upper end of the tower body. The three-layer cross-arm and the second group of three-layer cross-arm are symmetrical. The shortcoming of this kind of double-circuit line tower is that it needs to use cable transposition when transposition. As shown in Figure 3, after using cable transposition, the project cost will increase greatly , and the addition of joints will bring safety hazards to operation and maintenance; if cables are not used, the poles and towers of single-circuit lines are used for cross-transposition. Since the structure of poles and towers of single-circuit lines includes the tower body, there is a There are two symmetrical cross-arms on the lower side of one cross-arm, so at least four-base pole towers are required to cross-transpose, as shown in Figure 4, since at least four-base pole towers are required, the occupancy The land area has been greatly increased, and the project cost is also high. It can be seen from the search that there is no such thing as a first set of three-layer cross-arms on the upper side of the tower body, and a second set of three-layer cross-arms on the other side of the upper end of the tower body lower than the first set of three-layer cross arms. Layer cross-arm cross transposition does not use cables, which solves the problem of high construction cost and increased joints when double-circuit line poles and towers are used for cable transposition, or high cost and occupied area caused by cross-transposition of four-base poles and towers for single-circuit lines. Coverage of large pole towers.

Contents of the invention

The purpose of the utility model is to provide a double-circuit line with low cost, no cable used when the double-circuit line is erected on the same pole to cross over, low engineering cost, no increase in joints, and no increase in floor space at the same time, and a simple structure. The pole erects the cross-transposition pole tower.

In order to achieve the above purpose, the technical solution adopted by the utility model is: the double-circuit line erects a cross transposition pole tower on the same pole, including the tower body, which is characterized in that: the upper end of the tower body is provided with a first group of three floors Cross arm; on the other side of the upper end of the tower, there is a second group of three-layer cross arms; the distance between the upper layer of the second group of three-layer cross arms and the lower layer of the first group of three-layer cross arms is 4500-6000mm; The length of the first group of upper cross arms of the first group of three-layer cross arms is 2500-3200mm, the length of the first group of middle cross arms is 3100-3900mm, and the length of the first group of lower cross arms is 2600-3400mm; The length of the second group of upper cross-arms of the second group of three-layer cross-arms described above is 3400-3900mm, the length of the second group of middle-level cross-arms is 4000-4500mm, and the length of the second group of lower cross-arms is 3400-3900mm.

The utility model is also implemented through the following measures: the top of the tower body is connected with a lightning rod through a flange.

The tower body adopts a four-tube tower, and its structure is a known technology, so it will not be described more. The four-tube tower can achieve the purpose of occupying a small area, and can be used in hills, flat land, urban areas, etc. It is characterized in that it combines The advantages of the double-return tower and the single-return overhead cross-span are realized.

The beneficial effect of the utility model is that: the double-circuit line is erected on the same pole with a cross transposition tower, the structure is safe to use, and the cost is low. When the pole erection line crosses, it can effectively reduce the project cost, which is half of the usual design project cost, and occupies a small area.

Description of drawings

Fig. 1 is a schematic front view of the structure of the utility model.

Fig. 2 is a schematic diagram of the application state of the line crossover of the present invention.

Fig. 3 shows a top view schematic diagram of the current double-circuit line pole tower adopting cable transposition.

Fig. 4 shows a top view schematic diagram of the cross-transposition erection of the current single-circuit line tower.

In the figure: 1. Tower body; 2. The first group of three-story cross arms; 21; The first group of upper cross arms; 22. The first group of middle-level cross arms; 23. The first group of lower cross arms; 3. The second group Three-layer cross arm; 31, the second group of upper cross arm; 32, the second group of middle cross arm; 33, the second group of lower cross arm; 4, lightning rod; 5, double circuit line tower; 6, single circuit line tower.

Detailed ways

Make the utility model with reference to Fig. 1. Fig. 1 shows an embodiment of a pole tower that satisfies the cross-span of a 110kV double-circuit line. The cross transposition pole tower is erected on the same pole of the double-circuit line, including a tower body 1, which is characterized in that: the upper end side of the tower body 1 is provided with a first group of three-layer cross arms 2, and a loop wire is hung; on the tower body 1 The other side of the upper end of the upper end is provided with a second group of three-layer cross-arm 3, and another loop wire is hung; the distance between the upper layer of the second group of three-layer cross-arm 3 and the lower floor of the first group of three-layer cross-arm 2 is 4500- 6000mm; the length of the first group of upper cross-arms 21 of the first group of three-layer cross-arms 2 is 2500-3200mm, the length of the first group of middle-level cross-arms 22 is 3100-3900mm, and the length of the first group of lower cross-arms 23 The length is 2600-3400mm; the length of the second group of upper cross-arms 31 of the second group of three-layer cross-arms 3 is 3400-3900mm, the length of the second group of middle-level cross-arms 32 is 4000-4500mm, the second group of lower The length of the cross arm 33 is 3400-3900mm; the length and line distance of each group and each layer of cross arms can be determined by adjusting the gear distance and voltage level; the function of each group and each layer of cross arms is mainly to carry the weight of the wire and meet the electrical distance requirements , consists of L80*8 angle steel.

As an improvement of the utility model: the top of the tower body 1 is connected to the lightning rod 4 through a flange.

Described tower body 1 adopts four-pipe tower, and its structure is known technology, so do not describe more, adopt four-pipe tower, can realize the purpose that footprint is small, can be used for hills, flat land, urban area etc., its characteristic is that It combines the advantages of double-return towers and single-return overhead cross-spans.

When using this new type of use, as shown in Figure 2, it is necessary to set up two base double circuit lines on the same pole to erect cross transposition towers A1 and A2 in the line, and two base double circuit lines to erect cross transposition pole towers A1 and A2 on the same pole. The directions of one group of three-layer cross-arms 2 and the second group of three-layer cross-arms 3 are opposite, and on the outside of the cross transposition towers A1 and A2 of the two-base double-circuit lines erected on the same pole, there are multi-base double-circuit line towers B1, B2, B3, B4, the line I on the cross arm of the double circuit line tower B1, B2 is connected to the double circuit line tower B3 through the second group of three-layer cross arm 3 of the cross transposition pole tower A1 and A2 erected on the same pole of the two base double circuit lines , the cross arm on the other side of B4 realizes the crossover; in the same way, the line II of the cross arm on the other side of the double-circuit line tower B1 and B2 is erected on the same pole of the two-base double-circuit line. A group of three-layer cross-arms 2 are connected to the cross-arms on one side of the double-circuit line pole towers B3 and B4 to realize the crossover. In this way, the cable crossover is no longer used, and the four-base tower is no longer used to directly cross over.

Fig. 3 has provided the current double-circuit line pole tower to adopt the cable transposition wiring top view schematic diagram, as can be seen from Fig. 3, the line II on one side on the double-circuit line pole tower 5 is connected to the other on the other double-circuit line pole tower 5 through the cable. Side Line II.

Fig. 4 shows a top view schematic diagram of the cross-transposition wiring of the current single-circuit line pole tower. It can be seen from Fig. 3 that the cross-transposition wiring is completed only by using the four-base single-circuit line pole tower 6 .

Claims (2)

1. Erection of cross-transposition pole towers on the same pole of the double-circuit line, including the tower body (1), characterized in that: the first group of three-layer cross arms (2) are arranged on the upper end side of the tower body (1); The other side of the upper end of the body (1) is provided with a second group of three-layer cross arms (3); the upper layer of the second group of three-layer cross arms (3) and the lower layer of the first group of three-layer cross arms (2) The distance is 4500-6000mm; the length of the first group of upper cross-arms (21) of the first group of three-layer cross-arms (2) is 2500-3200mm, and the length of the first group of middle-level cross-arms (22) is 3100- 3900mm, the length of the first group of lower cross arms (23) is 2600-3400mm; the length of the second group of upper cross arms (31) of the second group of three-layer cross arms (3) is 3400-3900mm, the second The length of the group middle level cross arm (32) is 4000-4500mm, and the length of the second group of lower level cross arm (33) is 3400-3900mm. 2. The cross transposition pole tower erected on the same pole for double-circuit lines according to claim 1, characterized in that: the top of the tower body (1) is connected to the lightning rod (4) through a flange.