CN211789589U - A new type of grounding device for transmission line towers - Google Patents

Abstract

The utility model belongs to the technical field of electric power systems, and discloses a novel grounding device for a transmission line tower. A first connecting pipe is fixed at both ends of a grounding pipe, the first connecting pipe is a right-angle connecting pipe; the grounding pipe is connected to the first part of the first connecting pipe. A square is formed; the middle part of the grounding pipe is sleeved with a second connecting pipe, one side of the second connecting pipe is provided with a tower grounding leg, and the other side is provided with a grounding main line. The utility model forms a square by connecting the grounding pipe and the first connecting pipe at the first position, the structure is simple, the field operation is simple, and the versatility is strong, which can meet the requirements of the reconstruction of the grounding device of the transmission line tower and the construction of new lines; The anti-rust layer is provided, which prolongs the service life; under the condition that the grounding main line is not very long and the impact coefficient is not too large, the grounding resistance of the tower grounding device can be reduced to below the required value, and the inductance effect of the utility model can be reduced. , Improve the lightning resistance performance and strong adaptability to soil.

Description

A new type of grounding device for transmission line towers

technical field

The utility model belongs to the technical field of electric power systems, in particular to a novel grounding device for transmission line towers.

Background technique

At present, the grounding system of the transmission line tower is very important to the lightning protection of the line. A good tower grounding device can smoothly introduce the lightning current into the ground when the line is struck by lightning. Reducing the grounding resistance of the tower grounding device is one of the main measures to improve the lightning resistance level of the line and reduce the trip rate of the line lightning strike. The grounding device of the tower generally adopts the radial grounding electrode or the continuous extending grounding electrode to reduce the grounding resistance of the grounding device. In the actual operation process, because the grounding body is buried in the ground, it is easy to corrode and rust, resulting in the failure of the grounding device and the failure of the cross-sectional area to meet the lightning protection requirements, so it must be reformed in time. At present, the commonly used reconstruction method is to excavate annular grounding trenches and radial grounding trenches around the tower, and then connect the annular grounding body and the horizontal grounding body by welding. Because most of the transmission line towers are located in the mountains, forests and hills, there is no construction power supply, and only the generator can be used to generate electricity to drive the electric welding machine to work. Generators and electric welding machines are bulky and heavy, and many people are often required to carry them during the handling process. This is easy to implement in flat areas with convenient transportation, but it is very difficult to implement in mountainous and forest areas, resulting in a serious waste of human resources and electric welding. Construction is very easy to cause fire, and various fire prevention measures are required. There are many safety precautions, and it is difficult to control the operation site. Moreover, in mountainous areas with high soil resistivity, in order to reduce the grounding resistance of the tower grounding device to below the required value, it is often necessary to use a very long elongated grounding electrode. When the length of the grounding electrode is too large, the grounding body itself will show obvious inductance effect, which will prevent the lightning current from flowing to the far end of the grounding body. The impact grounding resistance of the tower grounding device is the most accurate evaluation index for the discharge capacity of the tower grounding device. Due to the existence of the inductance effect, the resistance reduction method of continuously extending the grounding body will increase the impact coefficient of the tower grounding device. The power frequency grounding resistance of the grounding device can be reduced to a certain extent, but due to the increase of the impact coefficient, the impact grounding resistance will not necessarily decrease, and the leakage speed and leakage capacity will not necessarily increase. Even if its impact grounding resistance is also reduced, the strong inductance effect of the continuously elongated grounding body will make the grounding body not fully utilized, reducing the economy and practicability of the tower grounding device.

Through the above analysis, the existing problems and defects in the prior art are:

(1) The existing transmission line tower grounding device is easy to rust, and an electric welding machine needs to be used in the assembly process, and the use of electric welding machine brings fire hazards, etc., and the assembly and handling are inconvenient.

(2) The prior art tower grounding device has strong inductance effect, low lightning resistance and poor adaptability to soil.

Utility model content

In order to solve the problems existing in the prior art, the utility model provides a novel grounding device for a transmission line tower.

The utility model is realized in this way, a novel transmission line tower grounding device is provided with:

grounding pipe;

There are four grounding pipes in total, and the two ends are respectively fixed with a first connecting pipe through threads, and the first connecting pipe is a right-angle connecting pipe; the grounding pipe is connected with the first connecting pipe to form a square shape; the grounding pipe The middle part is sleeved with a second connecting pipe, one side of the second connecting pipe is provided with a pole tower grounding leg, and the other side is provided with a grounding main line.

The utility model forms a square by connecting the grounding pipe and the first connecting pipe at the first position, the structure is simple, the field operation is simple, and the versatility is strong, which can meet the requirements of the reconstruction of the grounding device of the transmission line tower and the construction of new lines; The anti-rust layer is provided, which prolongs the service life; under the condition that the grounding main line is not very long and the impact coefficient is not too large, the grounding resistance of the tower grounding device can be reduced to below the required value, and the inductance effect of the utility model can be reduced. , Improve the lightning resistance performance and strong adaptability to soil.

Further, a vertical ground wire is fixed on the lower side of the main ground wire, and branch ground wires are fixed on both sides.

The utility model can shorten the length of the main ground wire through the vertical ground wire and the branch ground wire.

Further, both ends of the first connecting pipe are provided with internal threads, both ends of the grounding pipe are provided with external threads, and the internal threads are connected with the external threads.

Further, an anti-rust layer is provided on the outside of the grounding pipe, the first connecting pipe, the second connecting pipe, the main grounding wire, the vertical grounding wire and the branch grounding wire, and an anti-corrosion layer is arranged on the outside of the main grounding wire, the vertical grounding wire and the branched grounding wire. .

Further, a through hole is formed in the middle of the second connecting pipe, the inner diameter of the through hole is the same as the diameter of the grounding pipe, and the grounding pipe penetrates through the second connecting pipe and is fixed by welding.

Combined with all the above technical solutions, the advantages and positive effects of the present utility model are as follows: the utility model forms a square shape by connecting the grounding pipe and the first connecting pipe at the first position, the structure is simple, the field operation is simple, and the versatility is strong, which can meet the requirements of power transmission lines. The requirements for the reconstruction of the grounding device of the pole and tower and the construction of new lines; and the outer side of each component of the utility model is provided with a rust-proof layer, which prolongs the service life; under the condition that the main grounding line is not very long and the impact coefficient is not too large, the pole and tower can be installed. The grounding resistance of the grounding device is reduced below the required value, the inductance effect of the utility model is reduced, the lightning resistance performance is improved, and the adaptability to soil is strong.

Description of drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following will briefly introduce the drawings that need to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic structural diagram of a novel transmission line tower grounding device provided by an embodiment of the present invention.

2 is a schematic structural diagram of a ground rod provided by an embodiment of the present invention;

3 is a schematic structural diagram of a first connecting pipe provided by an embodiment of the present invention;

4 is a schematic structural diagram of a second connecting pipe provided by an embodiment of the present invention.

In the figure: 1. Grounding pipe; 2. The first connecting pipe; 3. The second connecting pipe; 4. Vertical grounding wire; 5. Branch grounding wire; 6. Grounding main wire; 7. Internal thread; 8. External thread; 9 , Tower grounding legs; 10. Through holes.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clear, the present utility model will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

In view of the problems existing in the prior art, the present utility model provides a novel grounding device for a transmission line tower. The present utility model is described in detail below with reference to the accompanying drawings.

As shown in Figures 1 to 4, the new transmission line tower grounding device provided by the present utility model includes: grounding pipe 1, first connecting pipe 2, second connecting pipe 3, vertical grounding wire 4, branch grounding wire 5, main grounding wire 6. Internal thread 7, external thread 8, pole tower grounding leg 9, through hole 10.

There are four grounding pipes 1 in total, and the two ends are respectively fixed with a first connecting pipe 2 through threads, and the first connecting pipe 2 is a right-angle connecting pipe; the grounding pipe 1 is connected with the first connecting pipe 2 to form a square; A second connecting pipe 3 is connected, one side of the second connecting pipe 3 is provided with a tower grounding leg 9, and the other side is provided with a grounding main line 6.

The utility model forms a square shape by connecting the grounding pipe 1 and the first connecting pipe 2 at the first position, the structure is simple, the field operation is simple, and the versatility is strong, which can meet the requirements of the transformation of the grounding device of the transmission line and the construction of new lines; The outer sides are provided with anti-rust layers, which prolongs the service life; under the condition that the grounding main wire 6 is not very long and the impact coefficient is not too large, the grounding resistance of the tower grounding device can be reduced to below the required value, thereby reducing the utility model The inductance effect, improved lightning resistance and strong adaptability to soil.

Preferably, a vertical grounding wire 4 is fixed on the lower side of the main grounding wire 6 , and branch grounding wires 5 are fixed on both sides.

The utility model can shorten the length of the main ground wire 6 through the vertical ground wire 4 and the branch ground wire 5 .

Preferably, both ends of the first connecting pipe 2 are provided with internal threads 7 , and both ends of the grounding pipe 1 are provided with external threads 8 , and the internal threads 7 are connected with the external threads 8 .

Preferably, the grounding pipe 1, the first connecting pipe 2, the second connecting pipe 3, the main grounding wire 6, the vertical grounding wire 4 and the branch grounding wire 5 are provided with anti-rust layers, and the main grounding wire 6, the vertical grounding wire 4 and the branch grounding wire An anti-corrosion layer is provided on the outside of the line 5.

Preferably, a through hole 10 is formed in the middle of the second connecting pipe 3 , the inner diameter of the through hole 10 is the same as the diameter of the grounding pipe 1 , and the grounding pipe 1 penetrates through the second connecting pipe 3 and is fixed by welding.

The working principle of the utility model is as follows: the grounding pipe and the first link pipe are assembled and connected, the grounding device of the transmission line tower of the present utility model is buried in the ground, the earth is backfilled, and the grounding leg 9 of the tower is connected with the tower to complete the transformation. and construction.

The above description is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited to this. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims (5)

1. The utility model provides a novel transmission line shaft tower earthing device, its characterized in that, novel transmission line shaft tower earthing device is provided with:

a ground pipe;

the grounding pipes are provided with four grounding pipes, and first connecting pipes are fixed at two ends of the grounding pipes through threads respectively and are right-angle connecting pipes; the grounding pipe is connected with the first connecting pipe at the head to form a square shape; and a second connecting pipe is sleeved in the middle of the grounding pipe, one side of the second connecting pipe is provided with a tower grounding leg, and the other side of the second connecting pipe is provided with a grounding main line.

2. The novel grounding device for transmission line towers according to claim 1, wherein a vertical grounding wire is fixed on the lower side of the grounding main wire, and branch grounding wires are fixed on two sides of the grounding main wire.

3. The novel grounding device for the transmission line tower as claimed in claim 1, wherein internal threads are formed at two ends of the first connecting pipe, external threads are formed at two ends of the grounding pipe, and the internal threads are connected with the external threads in a matched manner.

4. The novel grounding device for the transmission line tower as claimed in claim 1, wherein an anti-rust layer is disposed on the outer sides of the grounding pipe, the first connecting pipe, the second connecting pipe, the grounding main line, the vertical grounding line and the branch grounding line, and an anti-corrosion layer is disposed on the outer sides of the grounding main line, the vertical grounding line and the branch grounding line.

5. The novel grounding device for the power transmission line tower as claimed in claim 1, wherein a through hole is formed in the middle of the second connecting pipe, the inner diameter of the through hole is consistent with the diameter of the grounding pipe, and the grounding pipe penetrates through the second connecting pipe and is fixed in a welding manner.

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