CN103362343B - A kind of with tower six circuit pole tower - Google Patents

Abstract

The invention discloses a six-circuit pole tower with the same tower, which includes a tower head. The tower head is vertically arranged and distributed with left and right symmetrical five-layer cross arms from top to bottom. The first four layers of cross arms are elongated structures. 2-phase wires are hung on each side, and 1-phase wire is hung on each side of the fifth-layer cross-arm. Each phase has a voltage of 66KV. The three-phase on the same side of the fourth-layer cross-arm and the fifth-layer cross-arm is a circuit. The three phases on the same side of the first level cross arm, the second level cross arm and the third level cross arm are a circuit, and the three phases on the same side of the first level cross arm, the second level cross arm and the third level cross arm are One circuit, the ground wire support is arranged on the cross arm of the first layer, and the lightning protection ground wire is hung on the ground wire support. The invention can ensure the safe and reliable operation of the multi-circuit line, and is convenient for maintenance, construction and accident repair, can save a lot of line corridors, protect the environment, save engineering cost, and has great economic and social benefits.

Description

A six-circuit pole tower with the same tower

technical field

The invention relates to an electric power tower, in particular to a six-circuit tower with the same voltage level of 66KV.

Background technique

In areas with limited transmission line corridors, when multi-circuit transmission lines need to be built, if conventional single- and double-circuit erection methods are used, several line corridors are required, which will greatly increase the project cost, especially during the construction of the line. In terms of relocation compensation, the cost has increased too much. And compared with multiple circuits on the same tower, the erection of single and double circuits has no advantages in terms of land use efficiency and vegetation protection. The erection of single and double circuits on the same tower can no longer solve the growing contradiction between urban planning land use and the width of line corridors.

The patent "200920136718.8" discloses a tower based on six circuits on the same tower, which improves the power transmission capacity and saves land resources. However, the six circuits in this patent are circuits of different voltage levels, which do not have unity.

Contents of the invention

The purpose of the present invention is to provide a 66KV same-tower six-circuit tower with the same voltage level, which can effectively solve the above-mentioned existing problems.

The technical solution of the present invention is: a six-circuit pole tower with the same tower, including: tower head 1, tower head 1 is arranged vertically from top to bottom with left and right symmetrical five-layer cross arms, the first layer cross arms 2, the second layer The cross arm 3, the third layer cross arm 4 and the fourth layer cross arm 5 are elongated structures, the first layer cross arm 2, the second layer cross arm 3, the third layer cross arm 4 and the fourth layer cross arm 5 each layer 2-phase wires are hung on each side of the cross-arm, and 1-phase wire is hung on each side of the fifth-layer cross-arm 6, and each phase has a voltage of 66KV. The phase is a circuit, the three phases inside the same side of the first layer of cross arm 2, the second layer of cross arm 3 and the third layer of cross arm 4 are a circuit, the first layer of cross arm 2, the second layer of cross arm 3 and the third layer of cross arm Three-layer cross-arm 4 with the same side of the external three-phase is a circuit, the first layer of cross-arm 2 is provided with a ground wire support 7, and the ground wire support 7 is hung with a lightning protection ground wire. The cross arms on the upper four floors of the tower are lengthened, and the cross arms on the bottom floor are not lengthened, so the utilization rate of the corridor width has been greatly improved.

Preferably, the first-layer cross-arm 2 , the second-layer cross-arm 3 , the third-layer cross-arm 4 , the fourth-layer cross-arm 5 and the fifth-layer cross-arm 6 are all triangular cross-arms, and the structure bears clear force.

Preferably, the ground wire support 7 is an inverted triangular structure.

Preferably, the length of the bottom surface of the cross-arm 2 of the first layer is 14.6m, the length of the bottom surface of the cross-arm 3 of the second layer is 15.3m, the length of the bottom surface of the cross-arm 4 of the third layer is 16m, and the length of the bottom surface of the cross-arm 5 of the fourth layer is 16.7m. m, the length of the bottom of cross-arm 6 on the fifth layer is 10.4m; the vertical distance between the bottom of cross-arm 2 on the first layer and the bottom of cross-arm 3 on the second layer is 4.8m, the bottom of cross-arm 3 on the second layer and the bottom of cross-arm 4 on the third layer The vertical distance is 4.8m, the vertical distance between the bottom of cross-arm 4 on the third floor and the bottom of cross-arm 5 on the fourth floor is 4.8m, the vertical distance between the bottom of cross-arm 5 on the fourth floor and the bottom of cross-arm 6 on the fifth floor is 3.58m; The height of the layer cross arm 2 is 2.3m, and the height of the ground wire support 7 is 1.2m.

Preferably, the six-circuit pole tower on the same tower is a straight tower, and its insulator string is a V-shaped insulator string, which can effectively reduce the windage angle of the conductor, thereby reducing the length of the cross arm.

Preferably, the lightning protection ground wire is a GJ-50 steel strand or an OPGW optical cable.

Preferably, the type of the wire is LGJ-240/30 steel-cored aluminum stranded wire.

Preferably, the V-shaped insulator string adopts FXBW4-66/70 composite insulators, and the V angle is >90 degrees.

The invention can ensure the safe and reliable operation of the multi-circuit line, and is convenient for maintenance, construction and accident repair, can save a lot of line corridors, protect the environment, save engineering cost, and has great economic and social benefits.

Description of drawings

Fig. 1 is a structural schematic diagram of a six-circuit tower with the same tower according to the present invention.

Detailed ways

As shown in Figure 1, the new project of 66 kV terrane, ground dragon, and ground power transmission line in a certain place in Benxi area has a total length of 5.5km, and six circuits are erected on the same tower. The starting point is located at the 220 kV substation, and the end point is located at the branch tower of the 66 kV six-circuit branch. Passing through Hedigou Village, Damingshan Nature Reserve, etc., the route selection of the route has avoided the above-mentioned villages, passing through the periphery of the reserve, and the 66 kV Longmei line has been paralleled to connect to the branch tower of the six circuits.

The terrain along the line is roughly as follows: 90% is mountainous and 10% is hilly.

The six-circuit structure of the same tower erected is as follows: the tower head 1 is arranged vertically from top to bottom with five layers of symmetrical cross arms, the first layer of cross arms 2, the second layer of cross arms 3, the third layer of cross arms 4 and the third layer of cross arms. The four-layer cross-arm 5 is an elongated structure. The first-layer cross-arm 2, the second-layer cross-arm 3, the third-layer cross-arm 4, and the fourth-layer cross-arm 5 hang 2-phase wires on each side of each layer of cross-arm, and the fifth One phase wire is hung on each side of the horizontal arm 6, and each phase has a voltage of 66KV. The three phases on the same side of the fourth level cross arm 5 and the fifth level cross arm 6 form a circuit, and the first level cross arm 2, The inner three-phases on the same side of the second-layer cross-arm 3 and the third-layer cross-arm 4 are a circuit, and the external three-phases on the same side of the first-layer cross-arm 2 , the second-layer cross-arm 3 and the third-layer cross-arm 4 are One loop, the first floor cross arm 2 is provided with a ground wire support 7, and a lightning protection ground wire is hung on the ground wire support 7. The cross arms on the upper four floors of the tower are lengthened, and the cross arms on the bottom floor are not lengthened, so the utilization rate of the corridor width has been greatly improved.

The first-layer cross-arm 2 , the second-layer cross-arm 3 , the third-layer cross-arm 4 , the fourth-layer cross-arm 5 and the fifth-layer cross-arm 6 are all triangular cross-arms, and the structure bears clear force.

The ground wire support 7 is an inverted triangular structure.

The length of the bottom surface of the first horizontal arm 2 is 14.6m; The length of the bottom of cross-arm 6 is 10.4m; the vertical distance between the bottom of cross-arm 2 on the first layer and the bottom of cross-arm 3 on the second layer is 4.8m, and the vertical distance between the bottom of cross-arm 3 on the second layer and the bottom of cross-arm 4 on the third layer is 4.8m , the vertical distance between the bottom of cross-arm 4 on the third floor and the bottom of cross-arm 5 on the fourth floor is 4.8m, the vertical distance between the bottom of cross-arm 5 on the fourth floor and the bottom of cross-arm 6 on the fifth floor is 3.58m; The height is 2.3m, and the height of the ground wire support 7 is 1.2m.

The six-circuit pole tower of the same tower is a straight tower, and its insulator string is a V-shaped insulator string, which can effectively reduce the wind deflection angle of the conductor, thereby reducing the length of the cross arm.

The lightning protection ground wire is GJ-50 steel strand or OPGW optical cable.

The wire model is LGJ-240/30 steel-cored aluminum stranded wire.

The V-shaped insulator string adopts FXBW4-66/70 type composite insulator, and the V angle is > 90 degrees.

Compared with 6 single-circuit towers, the body investment of the same-tower six-circuit tower of the present invention is saved by 51%, and compared with three double-circuit towers, the body investment is saved by 43%. Three-phase V-string is used to reduce the line corridor by 4-6m; the layout of the tower head is more compact, which is suitable for urban crowded areas.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (5)

1. one kind with tower six circuit pole tower, comprise tower head (1), it is characterized in that, tower head (1) from top to bottom vertical arrangement is distributed with symmetrical five layers of cross-arm, first floor cross-arm (2), second layer cross-arm (3), third layer cross-arm (4) and the 4th layer of cross-arm (5) are elongate structure, first floor cross-arm (2), second layer cross-arm (3), on third layer cross-arm (4) and the 4th layer of cross-arm (5) every layer of cross-arm, every side hangs 2 phase conductors, the upper every side of layer 5 cross-arm (6) hangs 1 phase conductor, every voltage being all connected with 66KV mutually, the three-phase of the 4th layer of cross-arm (5) and layer 5 cross-arm (6) homonymy is a loop, first floor cross-arm (2), the three-phase of second layer cross-arm (3) and third layer cross-arm (4) homonymy inside is a loop, first floor cross-arm (2), the three-phase of second layer cross-arm (3) and third layer cross-arm (4) homonymy outside is a loop, first floor cross-arm (2) is provided with earth wire support (7) above, (7) hang with lightning protection ground wire to earth wire support, described first floor cross-arm (2), second layer cross-arm (3), third layer cross-arm (4), the 4th layer of cross-arm (5) and layer 5 cross-arm (6) are triangle cross-arm, described earth wire support (7) is inverted three-legged structure, described first floor cross-arm (2) bottom surface is long is 14.6m, second layer cross-arm (3) bottom surface is long is 15.3m, third layer cross-arm (4) bottom surface is long is 16m, 4th layer of cross-arm (5) bottom surface length is 16.7m, and layer 5 cross-arm (6) bottom surface is long is 10.4m, first floor cross-arm (2) bottom surface and second layer cross-arm (3) plane perpendicular spacing are 4.8m, second layer cross-arm (3) bottom surface and third layer cross-arm (4) plane perpendicular spacing are 4.8m, third layer cross-arm (4) bottom surface and the 4th layer of cross-arm (5) plane perpendicular spacing are 4.8m, and the 4th layer of cross-arm (5) bottom surface and layer 5 cross-arm (6) plane perpendicular spacing are 3.58m, the height of first floor cross-arm (2) is 2.3m, and the height of earth wire support (7) is 1.2m.

2. according to one according to claim 1 with tower six circuit pole tower, it is characterized in that, described same tower six circuit pole tower is a kind of tangent tower, and its insulator string is a kind of V-type insulator string.

3. according to one according to claim 2 with tower six circuit pole tower, it is characterized in that, described lightning protection ground wire is GJ-50 steel strand or OPGW optical cable.

4. according to one according to claim 3 with tower six circuit pole tower, it is characterized in that, described wire type is LGJ-240/30 steel-cored aluminium strand.

5. according to one according to claim 4 with tower six circuit pole tower, it is characterized in that, described V-type insulator string adopts FXBW4-66/70 type composite insulator, V angle > 90 degree.