CN111576978A - A transmission line drilling over tower - Google Patents

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

A transmission line drilling over tower

technical field

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

Background technique

At this stage, with the development of the city, the transmission line channel is becoming more and more tense. In the process of designing and constructing new lines, it is difficult to avoid crossover situations. In reality, there are a large number of 110kV-220kV drilling over 500kV and other high-voltage lines. In the past design schemes, conventional towers were mostly used, but the height of the towers was reduced. For example, a "single-circuit iron tower that simultaneously solves drilling and crossing requirements" disclosed in Chinese patent documents, its bulletin number CN109469399A, the tower body is respectively provided with a ground wire cross-arm and a second-layer cross-arm from top to bottom. The arm and the third-layer cross arm are provided with a protruding upper middle-phase suspension platform on the front or rear side of the upper part of the tower body, and a supporting lower part is provided on the same side of the lower part of the tower body. A middle-phase suspension platform; a second left phase wire suspension point and a second right phase wire suspension point are respectively provided at both ends of the second-layer cross-arm, and the supporting points are respectively provided at both ends of the third-layer cross-arm There are a third left phase wire suspension point and a third right phase wire suspension point, a second middle phase suspension point is arranged on the upper middle phase suspension table, and a third middle phase suspension point is arranged on the lower middle phase suspension table. This design scheme has major drawbacks. First of all, the conventional tower type that reduces the call height is difficult to ensure the natural growth height of buildings and plants under the line. Secondly, in some places with extreme crossing gears, even if the call height is reduced, it is difficult to meet the safety of wire crossing. distance.

SUMMARY OF THE INVENTION

The present invention is to overcome the difficulty of ensuring the natural growth height of buildings and plants under the line in the conventional tower type with reduced call height, and secondly, even if the call height is reduced, it is difficult to meet the safety distance of conductor crossing in some places where the limit crosses the file. To solve the problem, provide a transmission line drilling over the tower to ensure that the height from the ground is increased while avoiding the transmission line above.

In order to achieve the above object, the present invention adopts the following technical solutions:

A power transmission line drilling tower, comprising a tower body fixed on a working surface and a compensation mechanism for compensating the deflection of the tower body, the tower body comprising a tower foot assembly and a truss erected on the tower foot assembly, the truss The truss is placed horizontally, and the lower end surface of the truss is provided with a number of terminals for fixing the transmission line, the tower foot assembly includes a first tower foot and a second tower foot, and the compensation mechanism includes a gear, a rack group and a tension block, The gear is slidably connected to the first tower foot, the rack group includes a first rack and a second rack, the first rack and the second rack are respectively meshed with the gear, and the tension block is connected to the second rack. The tower feet are fixedly connected, one end of the first rack close to the tension block is provided with a first inclined surface, the corresponding position of the tension block is provided with a second inclined surface matched with the first inclined surface, and one end of the second rack close to the tension block is provided with a third inclined surface and a fourth inclined surface matched with the third inclined surface is arranged at the corresponding position of the tension block, and the second inclined surface and the fourth inclined surface are respectively located on two opposite end surfaces of the tension block. The function of the drilling tower is to reduce the ground clearance of the transmission lines within a range, so that the transmission lines in this section can avoid other transmission lines that cross. In the tower body of the present invention, the terminals are arranged horizontally on the truss, so that several transmission lines originally at different heights can be at the same level, so as to avoid the overall height reduction of the tower body due to the fact that several transmission lines are at different heights In the case of , the transmission line at the bottom is too close to the ground, resulting in the situation that the safe height cannot be reached. Because the tower body in the present invention will collect transmission lines of different heights and connect them out through the terminals of the same horizontal height, resulting in different tensile moments of the transmission lines on both sides of the tower body, the access end exists due to the existence of Transmission line at a higher position, so the total torque is larger. In order to prevent the tower body from being pulled by one side of the transmission line, the invention invented the roll, and a compensation mechanism is arranged between the tower body and the working surface, so that the tower body can actively correct the pulling force on one side.

Preferably, the connection terminals are arranged at equal intervals along the horizontal direction of the truss. Ensure that the truss is subjected to the same tensile force of the transmission line everywhere along the length direction.

Preferably, a sliding rail device is provided between the gear and the first tower foot, the sliding rail device includes a sliding groove and a sliding block matched with the sliding groove, the sliding groove is fixedly connected with the first tower foot, and the The sliding block and the gear are rotatably connected by a rotating shaft, and a first spring for pressing is arranged between the sliding block and the chute. The function of the slide rail device is to press the gear with the first rack and the second rack under the elastic force of the first spring, so that when the tower body is offset, the gear can still rotate and drive the rack.

Preferably, the tension block is provided with a reserved groove for generating deformation. The reserved groove is formed by cutting on the surface of the tension block. The function of the reserved groove provides a reserved space for the deformation of the tension block. When the tower body is offset, the angle of the tension block will also change accordingly, making the The angle between the second inclined plane and the fourth inclined plane changes, which affects the fit between the first rack and the second rack. When the block is changed, deformation occurs under the extrusion of the first rack and the second rack, so that the second inclined surface and the fourth inclined surface still remain in contact with the first inclined surface and the third inclined surface.

Preferably, the first rack and the second rack are respectively provided with second springs for pressing. The second springs respectively provide the first rack and the second rack with an external force that fits with the tension block.

Preferably, the reserved groove is filled with rubber. Avoid corrosion caused by the accumulation of foreign matter in the reserved groove.

Preferably, the tension block is an integral molding structure.

Therefore, the present invention has the following beneficial effects: (1) The wiring terminals are arranged horizontally on the truss, so that several transmission lines originally at different heights can be at the same horizontal level, so as to avoid that the transmission lines are at different heights. When the overall height of the tower body is reduced, the transmission line at the lower end is too close to the ground, resulting in a situation where the safe height cannot be reached; (2) A compensation mechanism is set between the tower body and the working surface, so that the tower body can be unilateral The tension is automatically corrected to avoid the tower body being pulled by one side of the transmission line and causing roll.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is another structural schematic diagram of the present invention.

FIG. 3 is a schematic structural diagram of the compensation mechanism of the present invention.

Figure 4 is a sectional view of the gear of the present invention.

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

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

Example

In the embodiments shown in FIGS. 1 , 2 , 3 and 4 , a transmission line 2 is drilled over a tower, including a tower body 1 fixed on a working face 3 and a compensation device for compensating for the offset of the tower body 1 Mechanism 8, the tower body 1 includes a tower foot assembly and a truss 4 erected on the tower foot assembly, the truss 4 is placed horizontally, and the lower end surface of the truss 4 is provided with a number of terminals 7 for fixing transmission lines at equal intervals along the length direction, The tower foot assembly includes a number of first tower feet 5 and the same number of second tower feet 6 . The first tower feet 5 and the second tower feet 6 are divided into two groups located at both ends of the truss 4 in the width direction. The compensation mechanism 8 includes a gear 9, a rack group and a tension block 12. A sliding rail device is provided between the gear 9 and the first tower foot 5. The sliding rail device includes a sliding groove and a sliding block 19 matched with the sliding groove. The first tower foot 5 is fixedly connected, the sliding block 19 and the gear 9 are rotatably connected through a rotating shaft, and a first spring 20 for pressing is provided between the sliding block 19 and the chute. The rack set includes a first rack 10 and a second rack. The first rack 10 and the second rack are respectively slidably connected with their corresponding frame bodies, and also through their corresponding second springs 18, so that they can maintain The first rack 10 and the second rack are meshed with the gear 9 respectively, the tension block 12 is fixedly connected with the second tower foot 6, and the first rack 10 close to the tension block 12 is provided with a first rack. An inclined surface 13, the corresponding position of the tension block 12 is provided with a second inclined surface 14 that cooperates with the first inclined surface 13, the end of the second rack close to the tension block 12 is provided with a third inclined surface 16, and the corresponding position of the tension block 12 is provided with a third inclined surface 16. The fourth inclined surface 15 , the second inclined surface 14 and the fourth inclined surface 15 matched with the three inclined surfaces 16 are respectively located on two opposite end surfaces of the tension block 12 . At the same time, 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 function of the reserved groove 17 provides a reserved avoidance space for the deformation of the tension block 12. When the tower body 1 is offset, the angle of the tension block 12 will also change accordingly, so that the angle of the second inclined surface 14 and the fourth inclined surface 15 on it will change, which affects the relationship between the first rack 10 and the second rack. In this scheme, an escape space is reserved in the middle of the tension block 12 through the reserved groove 17, so that when the tension block 12 is changed, it will deform under the extrusion of the first rack 10 and the second rack, The second inclined surface 14 and the fourth inclined surface 15 are still kept in contact with the first inclined surface 13 and the third inclined surface 16 .

When the tower body 1 is subjected to the pulling force of the transmission line 2 on one side, the tower body 1 is offset to one side of the first tower foot 5. During the offset process, the gear 9 rotates with the tower foot. At this time, the gear 9 And the slider 19 slides on the chute, and under the action of the first spring 20 , the relative position of the first rack 10 and the second rack is always kept fixed. The gear 9 drives the first rack 10 and the second rack to move. At one end of the tension block 12, the two racks squeeze the tension block 12 from opposite ends, and under the action of the inclined plane, the tension block 12 is moved toward the second rack. The tower foot 6 is pulled in the opposite direction of movement, so that the deflection of the tower body 1 is blocked.

Claims (7)

1. a power transmission line drilling tower, comprising the tower body fixed on the working surface and the compensation mechanism in order to compensate the offset of the tower body, it is characterized in that the tower body comprises a tower foot assembly and a pylon mounted on the tower foot assembly. A truss, the truss is placed horizontally, the lower end surface of the truss is provided with a number of terminals for fixing power lines, the tower foot assembly includes a first tower foot and a second tower foot, and the compensation mechanism includes gears, racks A group and a tension block, the gear is slidably connected to the first tower foot, the rack group includes a first rack and a second rack, the first rack and the second rack are respectively meshed with the gear, the The tension block is fixedly connected with the second tower foot, the first rack is provided with a first inclined plane at one end close to the tension block, the corresponding position of the tension block is provided with a second inclined plane matched with the first inclined plane, and the second rack is close to one end of the tension block. A third inclined surface is provided, a fourth inclined surface matched with the third inclined surface is provided at a corresponding position of the tension block, and the second inclined surface and the fourth inclined surface are respectively located on two opposite end surfaces of the tension block. 2 . The power transmission line drilling tower according to claim 1 , wherein the connection terminals are arranged at equal intervals along the horizontal direction of the truss. 3 . 3. A power transmission line drilling tower according to claim 1, characterized in that a sliding rail device is arranged between the gear and the first tower foot, and the sliding rail device comprises a sliding groove and a sliding groove matched with the sliding groove. The sliding block is fixedly connected with the first tower foot, the sliding block and the gear are connected by rotation through the rotating shaft, and a first spring for pressing is arranged between the sliding block and the sliding groove. 4 . The power transmission line drilling tower according to claim 1 , wherein the tension block is provided with a reserved groove for generating deformation. 5 . 5 . The power transmission line drilling tower according to claim 1 , wherein the first rack and the second rack are respectively provided with second springs for compressing. 6 . 6 . The power transmission line drilling tower according to claim 4 , wherein the reserved groove is filled with rubber. 7 . 7. The power transmission line drilling tower according to any one of claims 1-6, characterized in that the tension block is an integrally formed structure.

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