Grounding device suitable for multi-stone region

Abstract

The invention discloses a grounding device suitable for a multi-stone region, which comprises a grounding electrode, a vertical cylinder and a conical cylinder coaxially and slidably sleeved in the vertical cylinder, the lower port of the conical cylinder is larger than the upper port of the conical cylinder, and the grounding electrode comprises a vertical electrode column coaxially arranged in the conical cylinder. By arranging a coaxial separable structure of the vertical barrel and the upright conical barrel, a controllable resistance reducing agent forming space is formed in the multi-stone foundation. During construction, after a resistance reducing agent is poured into the conical barrel and solidified, low-resistance demolding is achieved through the structural characteristic that the resistance reducing agent is small in upper portion and large in lower portion and the gap which is gradually enlarged from bottom to top between the conical barrel and the vertical barrel. And then the vertical cylinder is smoothly pulled out, and the surrounding loess is backfilled from bottom to top and coated with the solidified resistance reducing agent to form the low-resistance grounding body in close contact with the soil. The structure effectively reduces the contact resistance and the soil resistivity, enlarges the equivalent diffusion area, and remarkably improves the grounding stability and the lightning protection performance.

Description

Technical Field

[0001] This invention relates to the field of grounding equipment technology, and in particular to a grounding device suitable for rocky areas. Background Technology

[0002] The following problems exist when constructing foundations in rocky areas during grounding construction: 1. Since the foundation soil mainly consists of stones and gravel with extremely high resistance, the horizontal grounding material is laid directly on the stones and gravel, which greatly reduces the lightning current dissipation effect. 2. If the foundation soil contains gravel, plant stalks, garbage, or other debris, and the grounding electrode is backfilled directly with this type of soil, it will result in a certain contact resistance during the current dissipation process of the grounding electrode, and the resistance reduction effect will be unsatisfactory. Summary of the Invention

[0003] To solve at least one of the above-mentioned technical problems, the present invention provides a grounding device suitable for rocky areas, which enables the electrodes to be vertically buried deep in the foundation soil and a resistance-reducing agent to be poured around the electrodes, thereby improving the grounding performance in rocky areas.

[0004] The technical solution adopted in this invention is to design a grounding device suitable for rocky areas, including a grounding electrode, a vertical cylinder and a conical cylinder coaxially slidably sleeved inside the vertical cylinder, wherein the lower port of the conical cylinder is larger than the upper port, and the grounding electrode includes a vertical electrode post coaxially disposed inside the conical cylinder.

[0005] In some embodiments, both the upper ends of the vertical cylinder and the conical cylinder are provided with lifting devices.

[0006] In some embodiments, the height of the vertical cylinder is greater than that of the conical cylinder.

[0007] In some embodiments, the upper port of the conical cylinder is closed by an end plate, which has a hole through which the vertical electrode post slides.

[0008] In some embodiments, the end plate is provided with a grouting pipe that communicates with the conical cylinder cavity for injecting a drag-reducing agent.

[0009] In some embodiments, the end plate is further provided with an air guide pipe for connecting a pneumatic control device, and the grouting pipe is provided with a control valve.

[0010] In some embodiments, an electric heating element is provided on the wall of the conical cylinder.

[0011] In some embodiments, the vertical electrode post is circumferentially distributed with support rods that support the inner wall of the conical cylinder.

[0012] In some embodiments, the end of the support rod is provided with a guide wheel that supports the inner wall of the conical cylinder.

[0013] In some embodiments, the support rod is inclined downwards, the support rod is rotatably connected to the vertical electrode post via a hinge, and a return spring is provided between the support rod and the vertical electrode post.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a coaxial, separable structure of a vertical cylindrical body and a square conical cylinder to create a controllable space for forming a resistance-reducing agent in rocky foundations. During construction, the resistance-reducing agent is poured into the conical cylinder and solidifies. Its "smaller at the top, larger at the bottom" structural characteristic and the gradually widening gap between it and the vertical cylinder allow for low-resistance demolding. Subsequently, the vertical cylinder is smoothly pulled out, and the solidified resistance-reducing agent is backfilled from bottom to top by surrounding loess, forming a low-resistance grounding electrode in close contact with the soil. This structure effectively reduces contact resistance and soil resistivity, expands the equivalent current dissipation area, and significantly improves grounding stability and lightning protection performance. The support rod, guide wheel, and end plate structure ensure coaxial positioning of the electrode post, improving molding accuracy. The grouting, air guiding, and heating devices further optimize the efficiency of resistance-reducing agent injection, demolding, and solidification, comprehensively improving construction reliability and engineering efficiency. Attached Figure Description

[0015] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings. To illustrate the details and facilitate understanding of its principles, the drawings are not necessarily to scale, and similar reference numerals may describe similar components in different views. The accompanying drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Wherein: Figure 1 This is a schematic diagram of the cross-section of the conical cylinder after the drag-reducing agent is injected, as shown in Example 1.

[0016] Figure 2 This is a schematic diagram of the cross-section when the conical cylinder is pulled upwards.

[0017] Figure 3 This is a schematic diagram of the cross-section when the vertical cylinder is pulled upwards.

[0018] Figure 4 This is a schematic diagram of the cross-section after the vertical electrode post is connected to the horizontal grounding electrode.

[0019] Figure 5 This is a schematic diagram of Example 2.

[0020] Figure 6 This is a schematic diagram of Example 3.

[0021] In the diagram, 1. Vertical cylinder; 2. Conical cylinder; 3. Vertical electrode post; 4. Horizontal grounding electrode; 5. Loess; 6. Pull ring; 7. Resistance reducing agent; 8. Support rod; 9. Guide wheel; 10. Return spring; 21. End plate; 11. Grouting pipe; 12. Air duct; 13. On / off control valve; 14. Electric heating element. Detailed Implementation

[0022] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments, and the following embodiments do not limit the invention covered by the claims. Furthermore, not all combinations of the features described in the embodiments are necessary for the inventive solution.

[0023] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0024] Example 1 like Figure 1 , 2As shown in Figures 3 and 4, a grounding device suitable for rocky areas includes a grounding electrode for connecting buildings or equipment. The grounding device also includes a vertical cylinder 1 and a conical cylinder 2 coaxially slidably fitted inside the vertical cylinder 1. The lower port of the conical cylinder 2 is larger than the upper port, that is, the conical cylinder 2 is in an upright position. Only the edge of the lower port of the conical cylinder 2 contacts the vertical cylinder 1. There is a gap between the conical cylinder 2 and the vertical cylinder 1 that gradually increases from bottom to top. The grounding electrode includes a vertical electrode post 3 coaxially arranged inside the conical cylinder 2. The vertical electrode post 3 can be made of steel bars or the like. During grounding construction, a trench can be dug in the foundation soil first. Then, several deep pits of similar height to the vertical cylinder 1 can be dug at certain intervals in the trench. The vertical cylinder 1 can then be placed vertically in the deep pits. The vertical electrode post 3 and the conical cylinder 2 can then be placed inside the vertical cylinder 1, with the vertical electrode post 3 located inside the conical cylinder 2. The vertical electrode post 3 and the conical cylinder 2 should be placed as relatively coaxially as possible, that is, the vertical electrode post 3 should be located on the axis of symmetry of the conical cylinder 2. Then, loess 5 should be filled into the deep pits around the vertical cylinder 1. After the filling is roughly level with the bottom of the trench, soil resistance reducing agent 7 should be poured into the conical cylinder 2. The resistance reducing agent 7 is a commonly used lightning protection product, used as an auxiliary material. It has good properties such as eliminating contact resistance, reducing soil resistivity, and increasing the effective cross-section of the grounding electrode. It is currently widely used in grounding projects. The drag-reducing agent 7 needs to be mixed with water in a certain proportion to form a paste, which is then poured into the cylinder. After it solidifies, the conical cylinder 2 is lifted upwards to move it out of the vertical cylinder 1. Because the conical cylinder 2 is smaller at the top and larger at the bottom, the solidified drag-reducing agent 7 will not generate significant upward resistance. After the conical cylinder 2 is removed, the vertical cylinder 1 is lifted upwards to move it out of the pit. At this time, because the solidified drag-reducing agent 7 is not in contact with the inner wall of the vertical cylinder 1, it will not generate resistance to its upward movement. Only the loess 5 in the outer pit exerts resistance on the outer wall of the vertical cylinder 1. The frictional resistance is generated, which is also conducive to the removal of the vertical cylinder 1. As the vertical cylinder 1 is removed, the loess 5 in the deep pit will fill the solidified resistance-reducing agent 7 from bottom to top. Then, the upper ends of the vertical electrode columns 3 in different deep pits can be electrically connected to the same horizontal grounding electrode 4 in the trench by welding or other means. The horizontal grounding electrode 4 is, for example, a zinc-clad steel round wire. The horizontal grounding electrode 4 is used to connect to the building or equipment that needs to be grounded. Then, the trench is filled with loess 5 to bury the horizontal grounding electrode 4, and then the original soil of the trench is buried on the buried loess 5.

[0025] Lifting devices, such as pull rings 6, can be provided at the upper ends of both the vertical cylinder 1 and the conical cylinder 2 to facilitate the pulling of equipment such as cranes.

[0026] The height of the vertical cylinder 1 is greater than that of the conical cylinder 2, so that the loess 5 in the deep pit outside the vertical cylinder 1 is higher than the solidified drag-reducing agent 7, thereby facilitating that after the vertical cylinder 1 is pulled out, the loess 5 is sufficient to fill the gap between the vertical cylinder 1 and the conical cylinder 2.

[0027] Example 2 like Figure 5 As shown, the vertical electrode post 3 is circumferentially distributed with support rods 8 that support the inner wall of the conical cylinder 2, so that the vertical electrode post 3 is located as close as possible to the central axis of the conical cylinder 2; the end of the support rod 8 is provided with a guide wheel 9 that supports the inner wall of the conical cylinder 2, so that the vertical electrode post 3 can move smoothly relative to the conical cylinder 2; the support rod 8 is inclined downwards, and the support rod 8 and the vertical electrode post 3 are rotatably connected by a hinge, and a return spring 10 is supported between the support rod 8 and the vertical electrode post 3, so that when the conical cylinder 2 is fitted on the support rod 8, the support rod 8 always supports the conical cylinder 2.

[0028] Example 3 like Figure 6 As shown, the upper port of the conical cylinder 2 is closed by an end plate 21. The end plate 21 is provided with a hole through which the vertical electrode post 3 slides. The hole is located on the central axis of the conical cylinder 2, that is, the upper port of the conical cylinder 2 is a closed port, which facilitates fixing the vertical electrode post 3 on the central axis of the conical cylinder 2.

[0029] Furthermore, the end plate 21 is provided with a grouting pipe 11 that is connected to inject the drag-reducing agent 7 into the inner cavity of the conical cylinder 2, so as to inject the drag-reducing agent 7 into the interior.

[0030] Furthermore, the end plate 21 may also be provided with an air guide pipe 12 for connecting to a pneumatic control device, and the grouting pipe 11 is provided with an on / off control valve 13. After the drag-reducing agent 7 is injected, the grouting pipe 11 can be closed by the on / off control valve 13, and then high-pressure air can be pumped into the conical cylinder 2 by a pneumatic control device such as an air pump, so that the conical cylinder 2 and the solidified drag-reducing agent 7 can be separated better and easier.

[0031] An electric heating element 14 can also be provided on the wall of the conical cylinder 2. For example, the conical cylinder 2 is made of a metal material with good thermal conductivity, and heating resistance wires or graphene heating films are embedded on or inside the conical cylinder 2 to increase the temperature of the conical cylinder 2, thereby facilitating the rapid solidification of the resistance reducing agent 7 and improving construction efficiency.

[0032] The specific embodiments described herein are merely illustrative examples illustrating the spirit of the invention. Those skilled in the art can make various modifications or additions to the described embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A grounding device suitable for rocky areas, comprising grounding electrodes, characterized in that, It also includes a vertical cylindrical body and a conical cylindrical body that is coaxially slidably sleeved inside the vertical cylindrical body. The lower port of the conical cylindrical body is larger than the upper port. The grounding electrode includes a vertical electrode post coaxially disposed inside the conical cylindrical body.

2. The grounding device for rocky areas according to claim 1, characterized in that, Both the vertical cylinder and the conical cylinder are equipped with lifting devices at their upper ends.

3. The grounding device for rocky areas according to claim 1, characterized in that, The vertical cylindrical body is taller than the conical cylindrical body.

4. The grounding device for rocky areas according to claim 1, characterized in that, The upper end of the conical cylinder is closed by an end plate, and the end plate is provided with a hole through which the vertical electrode post slides.

5. The grounding device for rocky areas according to claim 4, characterized in that, The end plate is provided with a grouting pipe that is connected to inject drag-reducing agent into the inner cavity of the conical cylinder.

6. The grounding device for rocky areas according to claim 5, characterized in that, The end plate is also provided with an air guide pipe for connecting to the air pressure control device, and the grouting pipe is provided with a control valve.

7. The grounding device for rocky areas according to claim 1, characterized in that, The vertical electrode post is circumferentially distributed with support rods that support the inner wall of the conical cylinder.

8. The grounding device for rocky areas according to claim 7, characterized in that, The end of the support rod is provided with a guide wheel that supports the inner wall of the conical cylinder.

9. The grounding device for rocky areas according to claim 7, characterized in that, The support rod is inclined downwards, and the support rod is rotatably connected to the vertical electrode post via a hinge. A return spring supports the support rod and the vertical electrode post.

10. The grounding device for rocky areas according to claim 1, characterized in that, An electric heating element is provided on the wall of the conical cylinder.

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