阅读说明：本技术 一种杆塔接地装置及其作业方法 (Tower grounding device and operation method thereof ) 是由 何泽燊 刘兴坤 孙焕腾 吴武忠 卢惠坛 张意明 谢永安 伍艳云 刘楷跃 彭志航 于 2021-09-22 设计创作，主要内容包括：本发明涉及一种杆塔接地装置及其作业方法,其中,杆塔接地装置包括安装孔、垂直接地极、连接杆和水平接地体,安装孔开设在输电线路杆塔的塔脚的一侧的地面内,安装孔与塔脚间隔,安装孔内沿竖直方向至少间隔设置两个垂直接地极,相邻两个垂直接地极通过连接杆连接,最上端的垂直接地极通过水平接地体与塔脚连接。该杆塔接地装置可以根据土壤的电阻率来设置安装孔内垂直接地极的数量,且增加垂直接地极的数量来减少接地电阻而不需增加开挖土壤的面积,其防雷效果好,占地面积小,还能降低安装杆塔接地装置的施工成本。此外,垂直接地极不需根据不同土壤的电阻率定制化生产,其能降低杆塔接地装置的生产成本。(The invention relates to a tower grounding device and an operation method thereof, wherein the tower grounding device comprises a mounting hole, vertical grounding electrodes, a connecting rod and a horizontal grounding body, the mounting hole is formed in the ground on one side of a tower foot of a power transmission line tower, the mounting hole is spaced from the tower foot, at least two vertical grounding electrodes are arranged in the mounting hole at intervals along the vertical direction, every two adjacent vertical grounding electrodes are connected through the connecting rod, and the uppermost vertical grounding electrode is connected with the tower foot through the horizontal grounding body. This shaft tower earthing device can set up the quantity of perpendicular earthing pole in the mounting hole according to the resistivity of soil, and increases the quantity of perpendicular earthing pole and reduces ground resistance and need not increase the area of excavation soil, and its lightning protection is effectual, and area is little, can also reduce the construction cost of installation shaft tower earthing device. In addition, the vertical grounding electrode does not need to be produced according to the resistivity of different soils in a customized mode, and the production cost of the tower grounding device can be reduced.)

1. The utility model provides a shaft tower earthing device, its characterized in that, includes mounting hole, perpendicular earthing pole, connecting rod and the horizontal grounding body, the mounting hole is seted up in the ground of one side of the tower foot of transmission line shaft tower, the mounting hole with the tower foot interval, set up two along vertical direction at least interval in the mounting hole perpendicular earthing pole, adjacent two the perpendicular earthing pole passes through the connecting rod is connected, and the top perpendicular earthing pole passes through the horizontal grounding body with the tower foot is connected.

2. The tower grounding device as claimed in claim 1, comprising a wire and a ten-thousand ohmmeter, wherein the ten-thousand ohmmeter is respectively connected to the bottommost vertical grounding electrode and the topmost vertical grounding electrode through the wire, and the ten-thousand ohmmeter is configured to detect an electrical conduction state between the vertical grounding electrodes located in the mounting holes.

3. The tower grounding device as claimed in claim 1, wherein the vertical grounding electrode is provided with a connecting hole, the connecting rod comprises a main body portion and two connecting portions, the two connecting portions are respectively fixed at two ends of the main body portion, the connecting portions are inserted into the connecting hole, and the connecting portions are gradually reduced towards one end far away from the main body portion.

4. The tower grounding device of claim 3, wherein the connecting holes are in interference fit with the connecting rods.

5. The tower grounding device as claimed in claim 1, wherein a threaded hole is formed at an end of the vertical grounding electrode, threads are formed at both ends of the connecting rod, and the end of the connecting rod is screwed into the threaded hole.

6. The tower grounding device of claim 1, wherein the horizontal grounding body is made of aluminum-copper-rare earth alloy; and/or the presence of a gas in the gas,

the vertical grounding electrode is made of aluminum-copper-rare earth alloy; and/or the presence of a gas in the gas,

the connecting rod is made of aluminum-copper-rare earth alloy.

7. The tower grounding device of claim 1, wherein the vertical grounding electrode is spaced from the tower foot by a distance of 0.5m to 1 m.

8. The tower grounding device of claim 1, wherein the outer side wall of the vertical grounding electrode is coated with a friction reducer.

9. The tower grounding device of claim 1, wherein the vertical grounding pole comprises a tubular body, and the outer side wall of the body is convexly provided with at least one extension.

10. An operation method of a tower grounding device, which is applied to the tower grounding device of any one of claims 1 to 9, and provides a vertical grounding electrode, a horizontal grounding body, a connecting rod, a lead and a kilohm meter, and further comprises the following steps:

s1, connecting one end of one lead with the end of the vertical grounding electrode;

s2, vertically driving the vertical grounding electrode into the ground;

s3, after the construction of one vertical grounding electrode is completed, inserting the connecting rod into the vertical grounding electrode for connection and fixation;

s4, sleeving the other vertical grounding electrode outside the connecting rod, and driving the vertical grounding electrode into the ground, wherein the number of the vertical grounding electrodes is added in the construction step until the grounding resistance of the tower grounding device meets the requirement;

s5, connecting the vertical grounding electrode positioned at the top with the tower leg through the horizontal grounding body;

s6, connecting the vertical grounding electrode positioned at the top with the other wire;

and S7, respectively connecting the two leads by using the kilohm table to detect the electric conduction state between the vertical grounding poles.

Technical Field

The invention relates to the technical field of power grid equipment, in particular to a tower grounding device and an operation method thereof.

Background

With the continuous development of the power industry, lightning accidents are increased, however, the grounding device is one of the main measures for lightning protection of the power transmission line, the grounding work of the power transmission line tower is well done to ensure the working efficiency, and the grounding device is very important for safe and stable operation of a power grid. At present, the earthing device of the transmission line tower mostly adopts radiation horizontal earthing, mainly depends on increasing the length of rays to realize reducing the earthing resistance of the tower, the length of the rays is increased along with the increase of the soil resistivity, so that the occupied area of the earthing device is increased, and the earthing device needs to dig a groove with a large area on the ground to install a horizontal earthing pole, if the earthing pole is influenced by the terrain factor, the construction cost is high, and the construction difficulty is large.

Disclosure of Invention

One object of an embodiment of the present invention is to: the tower grounding device is good in lightning protection effect and small in occupied area.

Another object of an embodiment of the present invention is to: the operation method of the tower grounding device is convenient to operate.

To achieve the purpose, the embodiment of the invention adopts the following technical scheme:

on the one hand, the utility model provides a shaft tower earthing device, including mounting hole, perpendicular earthing pole, connecting rod and horizontal grounding body, the mounting hole is seted up in the ground of one side of the tower foot of transmission line shaft tower, the mounting hole with the tower foot interval, set up two along vertical direction at least interval in the mounting hole perpendicular earthing pole, adjacent two perpendicular earthing pole passes through the connecting rod is connected, and the top perpendicular earthing pole passes through the horizontal grounding body with the tower foot is connected.

The tower grounding device comprises a wire and a ten thousand ohm meter, wherein the ten thousand ohm meter is respectively connected with the vertical grounding electrode at the bottommost end and the vertical grounding electrode at the topmost end through the wire, and the ten thousand ohm meter is used for detecting the electric conduction state between the vertical grounding electrodes in the mounting hole.

As a preferable scheme of the tower grounding device, the vertical grounding electrode is provided with a connecting hole, the connecting rod comprises a main body part and two connecting parts, the two connecting parts are respectively fixed at two ends of the main body part, the connecting parts are inserted into the connecting hole, and the connecting parts are gradually reduced towards one end far away from the main body part.

As the preferable scheme of the tower grounding device, the connecting holes and the connecting rod are in interference fit.

As a preferable scheme of the tower grounding device, a threaded hole is formed in the end portion of the vertical grounding electrode, threads are formed in the two ends of the connecting rod, and the end portion of the connecting rod is screwed in the threaded hole.

As a preferable scheme of the tower grounding device, the horizontal grounding body is made of aluminum-copper-rare earth alloy; and/or the presence of a gas in the gas,

the vertical grounding electrode is made of aluminum-copper-rare earth alloy; and/or the presence of a gas in the gas,

the connecting rod is made of aluminum-copper-rare earth alloy.

As a preferable scheme of the tower grounding device, the distance between the vertical grounding electrode and the tower foot is 0.5m-1 m.

As a preferable scheme of the tower grounding device, the outer side wall of the vertical grounding electrode is coated with a resistance reducing agent.

As a preferable scheme of the tower grounding device, the vertical grounding electrode comprises a tubular body, and at least one extension part is convexly arranged on the outer side wall of the body.

On the other hand, the operation method of the tower grounding device is provided, the vertical grounding electrode, the horizontal grounding body, the connecting rod, the lead and the ohmmeter are provided, and the method further comprises the following steps:

s1, connecting one end of one lead with the end of the vertical grounding electrode;

s2, vertically driving the vertical grounding electrode into the ground;

s3, after the construction of one vertical grounding electrode is completed, inserting the connecting rod into the vertical grounding electrode for connection and fixation;

s4, sleeving the other vertical grounding electrode outside the connecting rod, and driving the vertical grounding electrode into the ground, wherein the number of the vertical grounding electrodes is added in the construction step until the grounding resistance of the tower grounding device meets the requirement;

s5, connecting the vertical grounding electrode positioned at the top with the tower leg through the horizontal grounding body;

s6, connecting the vertical grounding electrode positioned at the top with the other wire;

and S7, respectively connecting two leads by using the kilohm table to detect the electric conduction state between the vertical grounding poles in the mounting hole.

The tower grounding device has the beneficial effects that: the installation holes are formed in the ground on one side of the tower foot of the power transmission line tower at intervals, two vertical grounding electrodes are arranged in the installation holes at intervals along the vertical direction at least, the two adjacent vertical grounding electrodes are connected through the connecting rod, the number of the vertical grounding electrodes in the installation holes can be set by an operator according to the resistivity of soil near the tower, the number of the vertical grounding electrodes in the installation holes is increased to reduce the grounding resistance without increasing the area for excavating the soil, therefore, the tower grounding device has a good lightning protection effect, the occupied area is small, and the construction cost for installing the tower grounding device can be reduced. In addition, the vertical grounding electrode does not need to be produced according to soil customization, and the production cost of the tower grounding device can be reduced.

The tower grounding device operation method has the beneficial effects that: the vertical grounding electrode is vertically driven, so that the area for excavating soil is reduced, and the construction efficiency is improved. In addition, the electric conduction condition between the vertical earth electrodes buried in the soil can be detected through the connection of the ohmmeter and the two leads, and the detection steps are simple and efficient.

Drawings

The invention is explained in more detail below with reference to the figures and examples.

Fig. 1 is a schematic structural diagram of a tower grounding device according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a connection structure of a vertical ground electrode and a connecting bar according to an embodiment of the invention.

Fig. 3 is a cross-sectional view of a vertical ground electrode and tie bar connection structure according to another embodiment of the present invention.

Fig. 4 is a cross-sectional view of a vertical ground electrode according to an embodiment of the invention.

In the figure:

100. a transmission line tower; 110. a tower foot;

1. a wire; 2. a vertical ground electrode; 21. connecting holes; 22. a body; 23. an extension portion; 24. a threaded hole; 3. a connecting rod; 31. a body portion; 32. a connecting portion; 4. a horizontal ground body; 5. a ten thousand ohm table.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 and 2, the tower grounding device of the present invention includes a mounting hole, vertical grounding electrodes 2, a connecting rod 3, and a horizontal grounding body 4, the mounting hole is opened in the ground on one side of a tower foot 110 of a power transmission tower 100, the mounting hole is spaced from the tower foot 110, at least two vertical grounding electrodes 2 are spaced in the mounting hole along the vertical direction, two adjacent vertical grounding electrodes 2 are connected by the connecting rod 3, and the uppermost vertical grounding electrode 2 is connected with the tower foot 110 by the horizontal grounding body 4. The operation personnel can set up the quantity of perpendicular earthing pole 2 in the mounting hole according to the resistivity of near soil of shaft tower, and two perpendicular earthing poles 2 are connected through connecting rod 3, increase the quantity of perpendicular earthing pole 2 in the mounting hole and reduce ground resistance and need not increase the area of excavating the soil, therefore, this shaft tower earthing device's lightning protection is effectual, area is little again, can also reduce the construction cost of installation shaft tower earthing device, reduce the excavation to soil, thereby reduce the destruction to the pole tower surrounding environment. In addition, the electrical resistivity of different soils can meet the grounding resistance by arranging different numbers of vertical grounding electrodes 2 in the mounting holes, so the vertical grounding electrodes 2 do not need to be produced in a customized manner according to the electrical resistivity of different soils, and the production cost of the tower grounding device can be reduced.

Preferably, the horizontal grounding body 4 is connected with the tower leg 110 by bolts, and the bolts can improve the mounting and dismounting efficiency of the horizontal grounding body 4. In other embodiments, argon arc welding may be used between the horizontal grounding body 4 and the tower foot 110, so that the horizontal grounding body 4 and the tower foot 110 are more firmly welded.

The vertical grounding electrode 2 of the tower grounding device is buried in soil, a plurality of vertical grounding electrodes 2 are possibly arranged in a mounting hole, the vertical grounding electrodes 2 are buried in deeper positions by the soil, and an operator cannot detect the electric conduction state of the vertical grounding electrode 2 covered by the soil when mounting or maintaining the vertical grounding electrode 2, so that the tower grounding device further comprises a lead 1 and a ten thousand ohm-meter 5, wherein the ten thousand ohm-meter 5 is respectively connected with the bottommost vertical grounding electrode 2 and the topmost vertical grounding electrode 2 through the lead 1, and if the ten thousand ohm-meter 5 detects that the resistance of the vertical grounding electrode 2 is infinite, the fact that effective connection is not formed between the vertical grounding electrode 2 and a connecting rod 3 or the vertical grounding electrode 2 is broken is proved; if the resistance value of the vertical grounding electrode 2 in the mounting hole is larger than the actual value through the detection of the ten-thousand-ohm meter 5, the connecting rod 3 and the vertical grounding electrode 2 are proved to be in virtual connection or the surface of the vertical grounding electrode 2 is proved to be seriously corroded. Of course, the ten-thousand-ohm meter 5 can be removed from the tower grounding device, and the lead 1 is connected with the ten-thousand-ohm meter 5 for detection when detection is needed.

In one embodiment, as shown in fig. 2, the vertical ground electrode 2 is provided with a connecting hole 21, the connecting rod 3 includes a main body portion 31 and two connecting portions 32, the two connecting portions 32 are respectively fixed at two ends of the main body portion 31, the connecting portions 32 are inserted into the connecting hole 21, and the connecting portions 32 are tapered toward one end away from the main body portion 31. When the vertical grounding electrode 2 is installed, the end, with the smaller diameter, of the outer wall of the connecting part 32 can be quickly inserted into the connecting hole 21, so that the installation efficiency of the vertical grounding electrode 2 is improved, and the construction is more convenient.

As the preferred scheme, the connecting hole 21 and the connecting rod 3 are in interference fit, the interference fit amount is between 0.1mm and 0.3mm, the connecting effect of the vertical grounding electrode 2 and the connecting rod 3 is the best when the interference fit amount is 0.2mm, the interference fit can avoid the influence on the conductive effect of the tower grounding device due to the gap between the connecting rod 3 and the vertical grounding electrode 2, and the connecting rod 3 and the vertical grounding electrode 2 can be connected more firmly.

In another embodiment, as shown in fig. 3, the end of the vertical grounding electrode 2 is provided with a threaded hole 24, the two ends of the connecting rod 3 are provided with threads, the end of the connecting rod 3 is screwed into the threaded hole 24, and the vertical grounding electrode 2 is connected with the connecting rod 3 through the threads, so that the structure is simple, the connection is firm, and the vertical grounding electrode 2 can be prevented from being separated from the connecting rod 3.

In this embodiment, the horizontal grounding body 4, the vertical grounding electrode 2 and the connecting rod 3 are all made of aluminum-copper-rare earth alloy, and the aluminum-copper-rare earth alloy material has good electrical property and corrosion resistance, and can prolong the service life and improve the conductivity of the tower grounding device. In other embodiments, the horizontal grounding body 4, the vertical grounding electrode 2 and the connecting rod 3 can also be made of graphene, galvanized steel, pure copper and other materials.

Preferably, the distance between the vertical grounding electrode 2 and the tower foot 110 is 0.5m-1m, so that the construction of operators is more convenient in the distance, and the vertical grounding electrode 2 has high conduction efficiency.

Preferably, the outer side wall of the vertical grounding electrode 2 is coated with a resistance reducing agent, the resistance reducing agent comprises fine graphite, bentonite, conductive cement and the like, the resistance reducing agent has good conductivity, the resistance reducing agent is coated outside the vertical grounding electrode 2, the vertical grounding electrode 2 can be in close contact with soil, a sufficiently large current flowing surface is formed, and the resistance reducing agent can permeate into surrounding soil, so that the resistivity of the surrounding soil is reduced.

Specifically, the vertical ground electrode 2 includes a tubular body 22, and at least one extension 23 is protrudingly provided on an outer side wall of the body 22. In this embodiment, as shown in fig. 4, three extending portions 23 are convexly disposed on the outer side wall of the body 22, two extending portions 23 are located on the same straight line, another extending portion 23 is located between the two extending portions 23, a rounded surface is disposed at a connection position of the extending portion 23 and the side wall of the body 22, the production and manufacturing of the vertical grounding electrode 2 are facilitated by the rounded surface, the side wall area of the vertical grounding electrode 2 can be increased by convexly disposing the three extending portions 23 on the body 22, and therefore the contact area of the vertical grounding electrode 2 and soil is increased to reduce the grounding resistance of the tower grounding device.

Specifically, the body 22 is integrally formed with the extension 23. In this embodiment, the body 22 and the extension portion 23 are integrally formed by a fusion casting and hot extrusion process, so that the vertical grounding electrode 2 has better electrical conductivity.

The tower grounding device operation method comprises the following steps:

s1, connecting one end of a lead 1 with the end of the vertical grounding electrode 2,

s2, vertically driving the vertical grounding electrode 2 into the ground;

s3, after the construction of one vertical grounding electrode 2 is completed, inserting the connecting rod 3 into the vertical grounding electrode 2 for connection and fixation

S4, sleeving the other vertical grounding electrode 2 outside the connecting rod 3, and driving the vertical grounding electrodes 2 into the ground, wherein the number of the vertical grounding electrodes 2 is added in the construction step until the grounding resistance of the tower grounding device meets the requirement;

s5, connecting the vertical grounding electrode 2 positioned at the top with the tower leg 110 through the horizontal grounding body 4;

s6, connecting the vertical grounding electrode 2 positioned at the top with another lead 1;

s7, using a ten thousand ohmmeter 5, two leads 1 are connected to each other, respectively, to detect the state of electrical conduction between the vertical ground electrodes 2.

In the embodiment, an operator firstly detects the resistivity of soil near the power transmission line tower 100 on site, then judges the installation number of the vertical grounding electrodes, then connects the lead 1 with the end of the vertical grounding electrode 2, drives the end of the vertical grounding electrode 2 connected with the lead 1 downwards into the ground through an electric pick tool, drives the vertical grounding electrode 2 into a specified position, inserts the connecting rod 3 into the vertical grounding electrode 2, uses the electric pick tool connecting rod to apply force until the connecting rod 3 is in interference fit with the vertical grounding electrode 2, then sleeves the other vertical grounding electrode 2 outside the connecting rod 3, drives the vertical grounding electrode 2 into the ground through an electric pick, adds the number of the vertical grounding electrodes 2 by using the construction steps until the grounding resistance meets the requirement, after the required vertical grounding electrodes 2 are all constructed, connects the vertical grounding electrode 2 positioned at the top with the tower foot 110 through the horizontal grounding body 4, meanwhile, another wire 1 is used to connect with the vertical grounding electrode 2 located at the top, and the ends of the two wires 1 far from the vertical grounding electrode 2 extend to the ground. The operation method of the tower grounding device reduces the step of excavating soil and improves the installation efficiency of the tower grounding device. Further, a ten thousand meter 5 is connected to the two leads 1, and the conductive state of the vertical earth electrode 2 buried in the soil can be detected by the ten thousand meter 5. If the resistance of the vertical grounding electrode 2 is infinite as detected by the ohmmeter 5, it is proved that no effective connection is formed between the vertical grounding electrode 2 and the connecting rod 3 or the vertical grounding electrode 2 is broken; if the resistance value of the vertical grounding electrode 2 in the mounting hole is detected to be larger than the actual value by the ten-thousand-ohm meter 5, the connecting rod 3 and the vertical grounding electrode 2 are proved to be in virtual connection or the surface of the vertical grounding electrode 2 is proved to be seriously corroded, the detection step is simple, and the detection efficiency is high.

In the description herein, it is to be understood that the terms "upper", "lower", and the like are used in a descriptive sense or positional relationship based on the orientation or positional relationship shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description herein, references to the term "an embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.