CN105155902B - A kind of compact double circuit, which becomes, exhales high shaft tower - Google Patents

Abstract

The utility model relates to a compact dual-circuit call-changing high pole tower. It includes the tower body and the top ground wire cross arm. The top ground wire cross arm has one layer, and the two side cross arms are arranged perpendicular to the direction of the new line from the tower body. The body is perpendicular to the direction of the newly-built line, and the middle-level auxiliary cross-arm is arranged from the tower body perpendicular to the direction of the new line. Arrange cross arms on both sides in the direction, and the lower conductor cross arm has two layers in total, and each layer is arranged on both sides of the cross arms perpendicular to the direction of the new line from the tower body. The invention avoids the influence on the arrangement of adjacent tower conductors, and adopts a compact triangular arrangement for the drilled side conductors, which reduces the height of the conductors and ground wires to the ground, further optimizes the drilled scheme, and reduces the need for reconstruction of old lines, cables entering the ground, Possibility of single and double circuit conversion.

Description

A compact dual-circuit call-changing high pole tower

Technical field:

The invention relates to the technical field of high-voltage transmission lines, in particular to a compact double-circuit call-changing high pole tower.

Background technique:

Transmission line engineering construction is an important part of power grid construction, and plays the role of transmission, distribution, and voltage regulation in the power system. In view of the same principle of selection of transmission lines for transmission corridors, for the sake of reducing costs and reducing land occupation, Transmission lines are usually run in parallel. Affected by the location of new substations, newly built lines often intersect with existing transmission lines. According to the requirements of regulations, it is advisable to cross lines with lower voltage levels and drill through lines with higher voltage levels. Therefore, transmission lines should be crossed before drilling ( Or drilling first and then crossing) happened frequently.

In actual engineering, for the situation that the transmission line spans first and then drills (or drills first and then spans), due to the influence of terrain and site environment, it is often difficult to directly implement only one base tower, and usually the following methods are required:

1) By increasing the line with a higher voltage level or reducing the line with a lower voltage level, it will cause a power outage on the line and increase the cost of line construction.

2) The method of overhead spanning and cable drilling is adopted, but the cost of cable entry into the ground is relatively high, and it is not easy to inspect after the line is completed.

3) Changing the double circuit into a single circuit, and building a two-base single-circuit drill-through tower to achieve drill-through, which has the problems of large footprint and high construction cost.

To sum up, the construction of the above scheme is difficult and the comprehensive cost is high, which is not conducive to the implementation of the project.

Invention content:

The purpose of the present invention is to provide a compact dual-circuit call-changing high pole tower. The line spanning side conductors of the pole tower are arranged in a drum shape, which is the same as the conventional line layout, and the influence on the arrangement of adjacent tower conductors is avoided. The compact triangular arrangement method reduces the height of guide wires and ground wires to the ground, further optimizes the drilling and overrunning scheme, and reduces the possibility of reconstruction of old lines, cables entering the ground, and conversion of single and double circuits.

In order to solve the problems existing in the background technology, the present invention adopts the following technical solutions: it includes the tower body, the top ground wire cross arm, the upper layer wire cross arm is arranged under the top layer ground wire cross arm, and the middle layer auxiliary cross arm is arranged under the upper layer wire cross arm The lower ground wire cross arm is set under the auxiliary cross arm of the middle layer, the lower layer conductor cross arm is set under the lower ground wire cross arm, and the top ground wire cross arm has a total of one layer. The upper conductor cross-arm is divided into three layers, and each layer is arranged with two-side cross-arms from the tower body perpendicular to the direction of the newly-built line. There is a total of one layer of ground wire cross arms, and the two side cross arms are arranged perpendicular to the direction of the newly built line from the tower body.

The cross-arms of the upper layer of the upper layer are equipped with jumper strings with support tubes on both sides of the higher layer, and two post insulators are provided at the tips of the cross-arms on both sides of each layer of the lower two layers, one of which is vertical In the direction of the new line, the other is parallel to the direction of the new line and located on the side of the drilled line;

The auxiliary cross arm of the middle layer is provided with three post insulators at the tips of the cross arms on both sides of each layer, one of which is perpendicular to the direction of the new line, one is parallel to the direction of the new line and is located on the side of the drilled line, and the other is parallel to the The direction of the newly created line is located on the side of the crossing line;

The ground wire crossarm of the lower layer is provided with three post insulators on the crossarms on both sides of each layer, one of which is arranged at the tip of the crossarm and parallel to the direction of the new line, and the other two are respectively arranged on both sides of the middle of the crossarm and are Parallel to the direction of the new line;

The cross-arms of the lower layer conductors are provided with two post insulators on the cross-arms on both sides of each layer, one of which is arranged at the tip of the cross-arm and parallel to the direction of the newly-built line, and the other is arranged in the middle of the cross-arm across the side of the line and Parallel to the direction of the new line, a jumper string with a support tube is respectively arranged at the tip and middle of the cross arms on both sides of the lower floor.

The invention realizes double-circuit change-call high-drilling crossing through a base pole tower, reduces the probability of cross-circuit reconstruction, cable entry into the ground, and single-double circuit conversion in the project of spanning first and then drilling (or drilling first and then spanning), and avoids the possibility of crossing lines The power outage increases the reliability of the power grid, reduces the construction cost, and further reduces the distance between the ground conductor and the ground of the newly built line of the drilling overpass.

Description of drawings:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a wiring diagram of the present invention.

detailed description:

Referring to Figure 1-2, it includes a tower body 1, a top-level ground wire cross-arm 2, an upper-level conductor cross-arm 3 is arranged below the top-level ground wire cross-arm 3, a middle-level auxiliary cross-arm 4 is arranged under the upper-level wire cross-arm 3, and the middle-level auxiliary The lower ground wire cross arm 5 is set under the cross arm 4, the lower ground wire cross arm 6 is set under the lower ground wire cross arm 5, and the top ground wire cross arm 2 has a total of one layer, and the two sides of the tower body 1 are arranged perpendicular to the direction of the new line. The upper-level conductor cross-arm 3 is divided into three layers, and each layer is arranged with two-side cross-arms from the tower body 1 perpendicular to the direction of the newly-built line, and the middle-level auxiliary cross-arm 4 is arranged from the tower body perpendicular to the direction of the newly-built line. Bearer, the lower ground wire cross arm 5 is a total of one layer, and the cross arms on both sides are arranged perpendicular to the direction of the new line from the tower body 1. The direction is arranged on both sides of the crossarm. The length of the top-layer ground wire cross-arm 2 and the distance between the wire cross-arm and the wire cross-arm must meet the requirements for lightning protection and ground wire spacing. The upper-layer wire cross-arm 3, the middle-layer auxiliary cross-arm 4, and the lower-layer ground wire 5. The length and layer spacing of the lower conductor cross-arm 6 must meet the electrical requirements. The length and spacing of the upper-layer cross-arm 3 also need to refer to the layout of the cross-side line wires. The number of layers of the middle auxiliary cross-arm 4 is determined by the drill The height difference between the crossing point and the crossing point is determined. The higher the height difference is, the more layers there are in the auxiliary cross arm 4 of the middle layer. Lightning protection requirements.

The upper layer conductor cross arm 3 is provided with a jumper string 7 with support tubes on both sides of the upper layer, and two post insulators 8 are arranged at the tip of each side cross arm of the lower two layers, one of which is The post insulator 8 is perpendicular to the direction of the new line, and the other is parallel to the direction of the new line and located on one side of the drilled line.

The auxiliary cross-arm 4 in the middle layer is provided with three post insulators 8 at the tips of the cross-arms on both sides of each layer, one of the post insulators 8 is perpendicular to the direction of the new line, one is parallel to the direction of the new line and is located on the side of the drilled line, and the other One parallel to the direction of the new route and on the side of the crossing route.

The ground wire crossarm 5 of the lower layer is provided with three post insulators 8 on both sides of each layer, one of which is arranged at the tip of the crossarm and parallel to the direction of the new line, and the other two are respectively arranged on the two sides of the middle of the crossarm. side and parallel to the direction of the new line.

The lower conductor cross-arm 6 is provided with two post insulators 8 on both sides of each layer, one of which is arranged at the tip of the cross-arm and parallel to the direction of the new line, and the other is arranged in the middle of the cross-arm across the line. Side and parallel to the direction of the new line, a jumper string 7 with a support tube is respectively provided at the tip and middle of the cross arms on both sides of the lower floor.

The distance between the charged point of the post insulator 8, the distance between the charged point and the wire and the ground wire, and the distance between the charged point and the tower body should meet the electrical requirements.

The ground wire on the crossing side is suspended on the top ground wire cross arm 2, and the drilled side ground wire is suspended on the ground wire cross arm 5 on the lower layer. The number of ground wires is determined according to the requirements for lightning protection and ground wire spacing and hanging position.

Referring to Fig. 2, a compact dual-circuit call-changing high pole tower of the basic invention is built between the drilling line and the crossing line. Drilling side conductors are suspended at 6 positions of the lower conductor cross arm, drilled side ground wires are suspended at 5 positions of the lower ground conductor cross arm, and the upper phase conductors on the crossing side use the upper conductor cross arm 3 and jumpers with support tubes on the highest layer The string 7 and the upper layer conductor cross arm 3 are two layers below, the middle layer auxiliary cross arm 4, and the lower layer ground wire cross arm 5 are drilled through the support insulator 8 on one side of the line, connected to the upper phase conductor on the drilled side, and the middle phase conductor on the crossing side uses the upper conductor The middle layer of cross arm 3 is a post insulator 8 perpendicular to the direction of the newly built line, the upper layer of wire cross arm 3 is two layers below, the middle layer of auxiliary cross arm 4 is a post insulator 8 perpendicular to the direction of the newly built line, the lower layer of ground wire cross arm 5, and the lower layer of wire cross arm 6 The support insulator on one side of the line across the line 8, the lower layer conductor cross arm 6 The insulator string 7 with support tube on the lower layer cross arm is connected to the lower phase conductor on the drilled side away from the tower body, and the upper layer conductor is used for the lower phase conductor on the crossover side Cross arm 3 lowest level, middle level auxiliary cross arm 4, lower ground wire cross arm 5, lower level wire cross arm 6 spanning post insulator 8 on one side of the line, lower level wire cross arm 6 with support tube insulator on the lower level cross arm String 7 is connected to the lower phase wire near the tower body on the drilling side. After the implementation, the crossing wire is arranged in a drum shape, and the drilling wire is arranged in a triangular shape.

According to the requirements of lightning protection and distance between conductors and ground wires, when the ground wire needs to be reserved, the distance between the crossing side wire and the ground wire of the crossed line, and the distance between the drilled side ground wire and the drilled line wire must be met. When the ground wire is canceled , it is necessary to meet the spacing between the crossing side conductor and the ground wire of the crossed line, and the distance between the drilling side conductor and the drilled line conductor, and cancel the ground wire cross arm of the lower layer.

Claims (1)

1. a kind of compact double circuit, which becomes, exhales high shaft tower, it is characterised in that it includes tower body, top layer ground wire cross-arm, top layer ground wire Topping wire cross-arm is provided with below cross-arm, middle level auxiliary cross-arm is provided with below topping wire cross-arm, middle level is aided under cross-arm Setting lower floor of side ground wire cross-arm, layer conductor cross-arm under lower floor's ground wire cross-arm lower section is set, totally one layer of the top layer ground wire cross-arm, from Tower body arranges both sides cross-arm perpendicular to newly-built line direction, the topping wire cross-arm points three layers, each layer from tower body perpendicular to Newly-built line direction arranges both sides cross-arm, and the middle level aids in cross-arm from tower body perpendicular to newly-built line direction arranging multiplayer both sides Cross-arm, totally one layer of lower floor's ground wire cross-arm, both sides cross-arm, the lower layer conductor are arranged perpendicular to newly-built line direction from tower body Two layers totally of cross-arm, each layer arrange both sides cross-arm from tower body perpendicular to newly-built line direction；

The higher one layer of both sides cross-arm of topping wire cross-arm is provided with the jumper string with support tube, and two layers below Every layer of both sides cross-arm taper is provided with two support insulators, one of support insulator perpendicular to newly-built line direction, Another gets over circuit side parallel to newly-built line direction and positioned at boring；

The middle level auxiliary cross-arm is provided with three support insulators in each layer of both sides cross-arm taper, and one of pillar is exhausted For edge perpendicular to newly-built line direction, one is got over circuit side parallel to newly-built line direction and positioned at boring, another parallel to Newly-built line direction and it is located at span line side；

Lower floor's ground wire cross-arm is provided with three support insulators on each layer of both sides cross-arm, wherein there is one to be arranged on horizontal stroke Carry on a shoulder pole taper and parallel to newly-built line direction, two other is separately positioned on cross-arm on both sides of the middle and each parallel to newly-built circuit side To；

The lower layer conductor cross-arm is provided with two support insulators on each layer of both sides cross-arm, wherein there is one to be arranged on Cross-arm taper and parallel to newly-built line direction, another is arranged in the middle part of cross-arm span line side and parallel to newly-built line Road direction, a jumper string with support tube is each provided with respectively in the taper of relatively low one layer of both sides cross-arm and middle part.