CN111576978A

CN111576978A - Transmission line drilling tower

Info

Publication number: CN111576978A
Application number: CN202010260274.XA
Authority: CN
Inventors: 曹征领; 张翼; 沈根强; 王俊; 戴建华; 俞伟勇; 张鹏; 寿峰; 张志亮; 季世超
Original assignee: HUZHOU ELECTRIC POWER DESIGN INSTITUTE CO LTD; Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Current assignee: HUZHOU ELECTRIC POWER DESIGN INSTITUTE CO LTD; Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-08-25
Anticipated expiration: 2040-04-03
Also published as: CN111576978B

Abstract

The invention discloses a power transmission line drilling tower, which comprises a tower body fixed on a working surface and a compensation mechanism used for compensating the deviation of the tower body, wherein the tower body comprises a tower foot component and a truss erected on the tower foot component, the truss is horizontally arranged, and a plurality of wiring terminals used for fixing a power transmission line are arranged on the lower end surface of the truss.

Description

Transmission line drilling tower

Technical Field

The invention relates to a power transmission tower, in particular to a power transmission line crossing tower.

Background

At the present stage, with the development of cities, the channels of the power transmission lines are increasingly tense. In the process of designing and building a new circuit, the cross-over condition is difficult to avoid. In a practical situation, a large number of lines with high voltage levels, such as 500kV, are drilled by 110kV-220 kV. The prior design scheme mostly adopts the conventional tower type, and only reduces the tower type nominal height. For example, a "single-circuit tower for simultaneously solving the crossing and crossing requirements" disclosed in chinese patent document, which is published with the publication No. CN109469399A, a tower body is respectively provided with a ground wire cross arm, a second layer cross arm and a third layer cross arm from top to bottom, an upper middle phase suspension platform protruding outwards is arranged on the front side or the rear side of the upper part of the tower body, and a lower middle phase suspension platform protruding outwards is arranged on the same side of the lower part of the tower body; and a second left-side phase wire suspension point and a second right-side phase wire suspension point are respectively arranged at two ends of the second layer of cross arm, a third left-side phase wire suspension point and a third right-side phase wire suspension point are respectively arranged at two ends of the third layer of cross arm in a matched manner, a second middle phase suspension point is arranged on the upper middle phase suspension platform, and a third middle phase suspension point is arranged on the lower middle phase suspension platform. The design scheme has the major disadvantages that the natural growth height of buildings and plants below a line is difficult to ensure by reducing the conventional tower type with the high calling scale, and the wire crossing safety distance is difficult to meet even if the calling scale height is reduced in places with limit crossing gears.

Disclosure of Invention

The invention provides a power transmission line crossing tower, which aims to overcome the problems that the natural growth height of buildings and plants below a line is difficult to ensure by the conventional tower type with the reduced nominal height, and the crossing safety distance of a lead is difficult to meet even if the nominal height is reduced in places with limit crossing gears, so that the height from the ground is improved while an upper power transmission line is avoided.

In order to achieve the purpose, the invention adopts the following technical scheme:

a power transmission line drilling tower comprises a tower body fixed on a working face and a compensation mechanism used for compensating the deviation of the tower body, wherein the tower body comprises a tower foot component and a truss erected on the tower foot component, the truss is horizontally placed, a plurality of connecting terminals used for fixing the power transmission line are arranged on the lower end face of the truss, the tower foot component comprises a first tower foot and a second tower foot, the compensation mechanism comprises a gear, a rack group and a tension block, the gear is in sliding connection with the first tower foot, the rack group comprises a first rack and a second rack, the first rack and the second rack are respectively meshed with the gear, the tension block is fixedly connected with the second tower foot, a first inclined face is arranged at one end, close to the tension block, of the first rack, a second inclined face matched with the first inclined face is arranged at the corresponding position of the tension block, and a third inclined face is arranged at one end, close to the tension block, of the second rack, and a fourth inclined plane matched with the third inclined plane is arranged at the corresponding position of the tension block, and the second inclined plane and the fourth inclined plane are respectively positioned on two opposite end faces of the tension block. The effect of drilling over the tower is to reduce the ground clearance of the transmission line in a section of range, so that the transmission line in the section can avoid other transmission lines which cross. According to the tower body, the wiring terminals are horizontally arranged on the truss, so that a plurality of transmission lines originally at different heights can be at the same horizontal plane height, and the condition that the lowest transmission line is too close to the ground to cause that the safety height cannot be reached under the condition that the whole height of the tower body is reduced because the plurality of transmission lines are at different heights is avoided. The tower body collects the power transmission lines with different heights and is connected out through the wiring terminals with the same horizontal height, so that the tension torque of the power transmission lines on two sides of the tower body is different, and the power transmission lines at higher positions exist at the connecting ends of the tower body, so that the total torque is larger. In order to avoid the side inclination of the tower body caused by the pulling of the single side of the power transmission line, a compensation mechanism is arranged between the tower body and the working surface, so that the tower body can actively correct the single-side pulling force.

Preferably, the connection terminals are arranged at equal intervals in the horizontal direction of the truss. The situation that all positions of the truss along the length direction are subjected to the same tension of the power transmission line is guaranteed.

Preferably, a sliding rail device is arranged between the gear and the first tower leg, the sliding rail device comprises a sliding groove and a sliding block matched with the sliding groove, the sliding groove is fixedly connected with the first tower leg, the sliding block is rotatably connected with the gear through a rotating shaft, and a first spring for compressing is arranged between the sliding block and the sliding groove. The slide rail device is used for pressing the gear, the first rack and the second rack under the elastic force action of the first spring, so that when the tower body deviates, the gear can still rotate and drive the rack.

Preferably, the tension block is provided with a preformed groove for generating deformation. The reserve tank forms through cutting process at the pulling force piece surface, the effect of reserve tank provides the dodge space of reservation for the deformation of pulling force piece, when the skew takes place for the tower body, the change of angle also can take place thereupon for the pulling force piece, make the angle on second inclined plane and fourth inclined plane on it change, influence and first rack, the laminating between the second rack, this scheme reserves the dodge space at the pulling force piece middle part through the reserve tank, make when the pulling force piece changes, deformation takes place under the extrusion of first rack and second rack, make the second inclined plane, the fourth inclined plane still keep with first inclined plane, the laminating on third inclined plane.

Preferably, the first rack and the second rack are respectively provided with a second spring for pressing. The second spring provides the external force with the pulling force piece laminating for first rack, second rack respectively.

Preferably, the reserve groove is filled with rubber. Prevent the corrosion caused by foreign matters deposited in the reserve tank.

Preferably, the tension block is of an integrally formed structure.

Therefore, the invention has the following beneficial effects: (1) the wiring terminals are horizontally arranged on the truss, so that a plurality of transmission lines originally at different heights can be at the same horizontal plane height, and the condition that the lowest transmission line is too close to the ground to cause that the safety height cannot be reached under the condition that the whole height of the tower body is reduced because the plurality of transmission lines are at different heights is avoided; (2) a compensation mechanism is arranged between the tower body and the working face, so that the tower body can actively correct the single-side pulling force, and the invention is prevented from tilting when the tower body is pulled by the single side of the power transmission line.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is another schematic structure of the present invention.

Fig. 3 is a schematic view of the structure of the compensating mechanism of the present invention.

Fig. 4 is a sectional view at the gear of the present invention.

In the figure: 1. the device comprises a tower body 2, a power transmission line 3, a working face 4, a truss 5, a first tower foot 6, a second tower foot 7, a wiring terminal 8, a compensation mechanism 9, a gear 10, a first rack 11, a second rack 12, a tension block 13, a first inclined plane 14, a second inclined plane 15, a fourth inclined plane 16, a third inclined plane 17, a reserved groove 18, a second spring 19, a sliding block 20 and a first spring.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

Examples

In the embodiment shown in fig. 1, 2, 3, and 4, an electric transmission line 2 passes through a tower, and includes a tower body 1 fixed on a working surface 3 and a compensation mechanism 8 for compensating for the deviation of the tower body 1, the tower body 1 includes a tower leg assembly and a truss 4 erected on the tower leg assembly, the truss 4 is horizontally disposed, a plurality of connection terminals 7 for fixing the electric transmission line are disposed on the lower end surface of the truss 4 at equal intervals along the length direction, the tower leg assembly includes a plurality of first tower legs 5 and a same number of second tower legs 6, and the first tower legs 5 and the second tower legs 6 are divided into two groups and located at two ends of the truss 4 in the width direction. The compensating mechanism 8 comprises a gear 9, a rack set and a tension block 12, a sliding rail device is arranged between the gear 9 and the first tower leg 5, the sliding rail device comprises a sliding groove and a sliding block 19 matched with the sliding groove, the sliding groove is fixedly connected with the first tower leg 5, the sliding block 19 is rotatably connected with the gear 9 through a rotating shaft, and a first spring 20 used for compressing is arranged between the sliding block 19 and the sliding groove. The rack group comprises a first rack 10 and a second rack, the first rack 10 and the second rack are respectively connected with the corresponding frame bodies in a sliding mode, and the first rack 10 and the second rack can respectively keep the tight state of the first rack and the second rack, the first rack 10 and the second rack are respectively meshed with the gear 9, the tension block 12 is fixedly connected with the second tower foot 6, a first inclined surface 13 is arranged at one end, close to the tension block 12, of the first rack 10, a second inclined surface 14 matched with the first inclined surface 13 is arranged at the corresponding position of the tension block 12, a third inclined surface 16 is arranged at one end, close to the tension block 12, of the second rack, a fourth inclined surface 15 matched with the third inclined surface 16 is arranged at the corresponding position of the tension block 12, and the second inclined surface 14 and the fourth inclined surface 15 are respectively located on two opposite end faces of the tension block 12. Meanwhile, the tension block 12 is provided with a reserved groove 17 for generating deformation, the reserved groove 17 is formed by cutting the surface of the tension block 12, the reserved groove 17 is used for providing a reserved avoidance space for the deformation of the tension block 12, when the tower body 1 deviates, the tension block 12 can change the angle therewith, the angle of the second inclined surface 14 and the angle of the fourth inclined surface 15 on the tension block change, the influence is related to the first rack 10 and the attachment between the second racks, the avoidance space is reserved in the middle of the tension block 12 through the reserved groove 17 in the scheme, when the tension block 12 changes, the deformation is generated under the extrusion of the first rack 10 and the second rack, the second inclined surface 14 is related to the attachment of the fourth inclined surface 15, the first inclined surface 13 and the third inclined surface 16 are still maintained.

When the tower body 1 is under the action of the pulling force of the single-side power transmission line 2, the tower body 1 deviates towards one side of the first tower foot 5, the gear 9 rotates along with the tower foot in the deviation process, at the moment, the gear 9 and the sliding block 19 slide on the sliding groove, and the first and second racks are fixed in relative positions all the time under the action of the first spring 20. The gear 9 drives the first rack 10 and the second rack to move, the two racks respectively extrude the tension block 12 from two opposite ends at one end of the tension block 12, and the tension block 12 is pulled towards the opposite direction of the movement of the second tower foot 6 under the action of the inclined plane, so that the deviation of the tower body 1 is blocked.

Claims

1. A power transmission line drilling tower comprises a tower body fixed on a working face and a compensation mechanism used for compensating the deviation of the tower body, and is characterized in that the tower body comprises a tower foot component and a truss erected on the tower foot component, the truss is horizontally placed, a plurality of wiring terminals used for fixing a power transmission line are arranged on the lower end face of the truss, the tower foot component comprises a first tower foot and a second tower foot, the compensation mechanism comprises a gear, a rack group and a tension block, the gear is in sliding connection with the first tower foot, the rack group comprises a first rack and a second rack, the first rack and the second rack are respectively meshed with the gear, the tension block is fixedly connected with the second tower foot, a first inclined face is arranged at one end, close to the tension block, of the first rack, a second inclined face matched with the first inclined face is arranged at the corresponding position of the tension block, a third inclined face is arranged at one end, close to the tension block, of the, and a fourth inclined plane matched with the third inclined plane is arranged at the corresponding position of the tension block, and the second inclined plane and the fourth inclined plane are respectively positioned on two opposite end faces of the tension block.

2. The power transmission line climbing tower according to claim 1, wherein the connection terminals are arranged at equal intervals in the horizontal direction of the truss.

3. The power transmission line tower crossing according to claim 1, wherein a slide rail device is arranged between the gear and the first tower foot, the slide rail device comprises a sliding groove and a sliding block matched with the sliding groove, the sliding groove is fixedly connected with the first tower foot, the sliding block is rotatably connected with the gear through a rotating shaft, and a first spring for compressing is arranged between the sliding block and the sliding groove.

4. The power transmission line tower crossing according to claim 1, wherein the tension block is provided with a preformed groove for generating deformation.

5. The power transmission line climbing tower according to claim 1, wherein the first rack and the second rack are respectively provided with a second spring for pressing.

6. The power transmission line crossing tower according to claim 4, wherein the preformed groove is filled with rubber.

7. The power transmission line climbing tower according to any one of claims 1 to 6, wherein the tension block is of an integrally formed structure.