Movable grounding grid device for arid area

Abstract

The utility model discloses a movable grounding grid device for arid regions and belongs to the technical field of grounding structures. A movable grounding grid device for an arid area place comprises a foundation pit formed in the ground and a plurality of grounding electrode bodies, the grounding electrode bodies are connected together through a mounting frame, the grounding electrode bodies are erected and placed in the foundation pit through the mounting frame, the foundation pit is filled with a resistance reducing agent, the mounting frame comprises a central stand column, and the central stand column is arranged on the ground. Adjustable fixing plates corresponding to the grounding electrode bodies in number are fixedly arranged at the lower part of the central stand column, and one end of each adjustable fixing plate is fixedly connected with the central stand column; according to the utility model, the grounding electrode bodies can be conveniently placed in the foundation pit through the arranged mounting rack, then the grounding electrode bodies are not easy to topple when the resistance reducing agent and the backfill soil are filled, and the distance between the grounding electrode bodies can be ensured to be unchanged, so that the problem that a grounding grid is inconvenient to arrange in an arid region in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of grounding structures, in particular to a movable grounding grid device for arid areas. Background Technique

[0002] In the prior art, the grounding grid usually adopts a mesh structure laid with metal. By burying conductor grids or grounding grids underground, multiple grounding bodies are connected together and connected to the grounding point of the main equipment. The stability and controllability of the grounding resistance are improved by setting the shape, size and depth of the grid.

[0003] For the electrical grounding in arid areas and bedrock sites, due to the weak conductivity of the soil, the grounding resistance may not meet the specification requirements, the grounding of the equipment shell is ineffective, threatening the electrical safety. At the same time, the existing grounding flat iron mesh construction is more cumbersome, requiring welding and anti-corrosion in many places, occupying a large area, and some bedrocks need to be excavated to lay the grounding grid.

[0004] In view of the above problems, this application proposes a grounding grid structure suitable for arid areas that is easy to install. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem that it is inconvenient to set up a grounding grid in arid areas in the prior art, and a movable grounding grid device for arid areas is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A movable grounding grid device for arid areas includes a foundation pit dug on the ground and several grounding electrodes. The several grounding electrodes are connected together through a mounting frame. The grounding electrodes are erected and placed in the foundation pit through the mounting frame, and the foundation pit is filled with a resistance reducing agent.

[0008] Preferably, the mounting frame includes a central column. A plurality of adjustable fixing plates corresponding to the number of grounding electrodes are fixedly arranged at the lower part of the central column. One end of the adjustable fixing plate is fixedly connected to the central column, and a pipe clamp is arranged at the other end. The grounding electrode is connected to the adjustable fixing plate through the pipe clamp.

[0009] Preferably, the adjustable fixing plate includes a first fixing plate and a second fixing plate. The first fixing plate and the second fixing plate are fixedly connected by two bolts.

[0010] Preferably, the inner end of the first fixing plate is fixedly connected to the central column, and the outer end of the second fixing plate is fixedly connected to the pipe clamp.

[0011] Preferably, a connection frame is fixedly arranged at the lower part of the central column. The connection frame is located below the adjustable fixing plate. Graphite soft belts equal in number to the grounding electrodes are fixedly arranged on the connection frame. One end of each graphite soft belt is fixedly connected to the connection frame, and the other end is fixedly connected to the outer end of the second fixing plate.

[0012] Preferably, a lifting ring is fixedly arranged at the top of the central column.

[0013] Preferably, a lead wire is fixedly arranged at the upper part of the grounding electrode. The upper end of the lead wire is fixedly provided with a grounding busbar, and the grounding busbar protrudes above the ground.

[0014] Compared with the prior art, the present utility model provides a movable grounding grid device for arid areas, having the following beneficial effects.

[0015] 1. In the present utility model, the grounding electrodes can be conveniently placed into the foundation pit through the provided mounting frame. Then, when filling the resistance reducing agent and backfilling the soil, the grounding electrodes are not easily toppled, and the distance between the grounding electrodes can be ensured to remain unchanged, thus solving the problem that it is inconvenient to set up the grounding grid in arid areas in the prior art.

[0016] 2. In the present utility model, through the provided mounting frame, not only can the grounding electrodes be prevented from toppling and the distance between them be ensured, but also the bottom ends of the grounding electrodes do not need to be inserted into the bottom surface of the foundation pit, enabling the resistance reducing agent to cover the grounding electrodes as much as possible.

[0017] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent description; and to some extent, based on the study of the following text, they will be obvious to those skilled in the art; or, they can be learned from the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0019] Figure 2 It is a schematic diagram of the connection structure between the grounding electrode and the mounting frame in the present utility model.

[0020] Figure 3 It is a schematic diagram of the structure of the adjustable fixing plate and the graphite soft belt in the present utility model.

[0021] Figure 4 It is a disassembled structure schematic diagram of the adjusting fixing plate in the present utility model.

[0022] Figure 5 It is a schematic diagram of the structure of the connection frame in the present utility model.

[0023] In the figure:

[0024] 1. Foundation pit; 2. Hoisting ring; 3. Grounding busbar; 4. Lead wire; 5. Grounding electrode body; 6. Central column; 7. First fixing plate; 8. Second fixing plate; 9. Pipe clamp; 10. Graphite soft tape; 11. Bolt; 12. Connecting frame. Specific implementation manner

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] Refer to Figures 1-5 , a movable grounding grid device for arid area sites, including a foundation pit 1 dug on the ground and several grounding electrode bodies 5. The several grounding electrode bodies 5 are connected together through a mounting frame. The grounding electrode bodies 5 are erected and placed in the foundation pit 1 through the mounting frame, and the foundation pit 1 is filled with a resistance reducing agent.

[0027] In a specific embodiment of the present invention, the number of the grounding electrode bodies 5 is four. The foundation pit 1 can be excavated by an excavator or manually; the four grounding electrode bodies 5 are arranged in a state as shown in Figure 2 , and the distance between adjacent grounding electrode bodies 5 is the same.

[0028] During construction, first excavate a foundation pit 1, and then place the mounting frame and the grounding electrode bodies 5 mounted on the mounting frame into the foundation pit 1. Since the mounting frame connects the four grounding electrode bodies 5 together, the positions of the four grounding electrode bodies 5 will not change and it is not easy to tilt, which is convenient for subsequent filling of the resistance reducing agent and backfilling operation. After placing, fill the foundation pit 1 with the resistance reducing agent. A large amount of the resistance reducing agent can be filled, and then the upper part of the foundation pit 1 is backfilled with soil; or the resistance reducing agent can be coated on the grounding electrode bodies 5, and then the foundation pit 1 is backfilled with moist soil; or the resistance reducing agent and backfill soil can be filled alternately; after filling the foundation pit 1 with soil, the installation of the grounding grid is completed.

[0029] This solution is mainly applicable to the grounding grid layout in arid areas or with rock foundations. The resistance reducing agent is a mixture composed of fine graphite, bentonite, curing agent, lubricant, and conductive cement, which has extremely strong water absorption and water retention properties and good electrical conductivity. After using the resistance reducing agent around the grounding body, the resistance reducing agent will diffuse and penetrate around, enabling the grounding body to be more closely combined with the soil or rock foundation, which can greatly reduce the resistivity and improve the grounding effect, so as to achieve the purpose of reducing the grounding resistance value.

[0030] The grounding electrode body 5 can be selected from copper-clad grounding tubes, graphite grounding tubes, galvanized steel grounding tubes or steel pipes. At the same time, an anti-corrosion resistance reducing agent can be poured into the tube body to reduce the insulation of the tube body and make the conductivity of the grounding electrode body 5 better.

[0031] The mounting bracket includes a central column 6. At the lower part of the central column 6, adjustable fixing plates corresponding to the number of grounding electrodes 5 are fixedly arranged. One end of the adjustable fixing plate is fixedly connected to the central column 6, and the other end is provided with a pipe clamp 9. The grounding electrode 5 is connected to the adjustable fixing plate through the pipe clamp 9. The pipe clamp 9 is made of conductive metal and consists of two semi-circular plates. The two semi-circular plates jointly clamp the grounding electrode 5, and then the two semi-circular plates are fixed by bolts and nuts.

[0032] In this solution, four grounding electrodes 5 are provided, and correspondingly four adjustable fixing plates are also provided, and they are in one-to-one correspondence with the grounding electrodes 5, that is, one grounding electrode 5 is connected to the central column 6 through one adjustable fixing plate.

[0033] The adjustable fixing plate includes a first fixing plate 7 and a second fixing plate 8. The first fixing plate 7 and the second fixing plate 8 are fixedly connected by two bolts 11. Through holes are formed on both the first fixing plate 7 and the second fixing plate 8. When connecting, after the bolts 11 pass through the corresponding through holes on the first fixing plate 7 and the second fixing plate 8, the matching nuts are screwed on to fixedly connect the first fixing plate 7 and the second fixing plate 8. By using two bolts 11 for fixation, relative rotation between the first fixing plate 7 and the second fixing plate 8 can be prevented. By changing the bolts 11 passing through different through holes, the relative position between the first fixing plate 7 and the second fixing plate 8 can be changed, and then the maximum length formed by the first fixing plate 7 and the second fixing plate 8 can be adjusted, so that the distance between the grounding electrode 5 and the central column 6 can be changed, and then the distance between adjacent grounding electrodes 5 can be adjusted.

[0034] The inner end of the first fixing plate 7 is fixedly connected to the central column 6, and the outer end of the second fixing plate 8 is fixedly connected to the pipe clamp 9.

[0035] A connecting frame 12 is also fixedly arranged at the lower part of the central column 6. The connecting frame 12 is located below the adjustable fixing plate. Graphite soft tapes 10 with the same number as the grounding electrodes 5 are fixedly arranged on the connecting frame 12. One end of the graphite soft tape 10 is fixedly connected to the connecting frame 12, and the other end is fixedly connected to the outer end of the second fixing plate 8. One graphite soft tape 10 corresponds to one second fixing plate 8.

[0036] Both the connecting frame 12 and the second fixing plate 8 are made of conductive metal. Through the connecting frame 12 and the graphite soft tapes 10, the grounding electrodes 5 can be connected together. By using the excellent conductivity of the graphite soft tapes 10, the electric conductance on one grounding electrode 5 can be conducted to other grounding electrodes 5, thereby increasing the connection range with the land.

[0037] A lifting ring 2 is fixedly arranged at the top of the central column 6. By means of the provided lifting ring 2, the mounting frame and the grounding electrode body 5 can be hoisted into the foundation pit 1 by a hoisting mechanism during installation. The hoisting mechanism can be an excavator used for digging the pit. A steel wire rope is passed through the lifting ring 2 and then tied to the bucket of the excavator for hoisting. It can also be that two construction workers pass a steel pipe through the lifting ring 2 and then the two work together to place the mounting frame and the grounding electrode body 5 into the foundation pit 1.

[0038] A lead wire 4 is fixedly arranged on the upper part of the grounding electrode body 5. The upper end of the lead wire 4 is fixedly provided with a grounding bus 3. The grounding bus 3 protrudes from the ground. When backfilling with soil, just pay attention to leaving the grounding bus 3 protruding from the ground. The grounding bus 3 is used to connect the grounding wires of various electrical equipment.

[0039] This solution belongs to the application of replacing the grounding grid to achieve an effective resistance in arid underground areas. For electrical equipment such as water conservancy and hydropower, pumped-storage power project transformers, and distribution system cabinets located in arid regions, using this solution to replace the large-area grounding grid and being able to achieve the grounding resistance within the effective specification can reduce the large-area laying of the grounding grid and simply and effectively achieve the grounding resistance of the power consumption system within the specification value. This solution has a simple structure, fast construction, and is convenient for quickly and reasonably arranging for a certain construction power consumption site in arid areas. If the grounding grid is not used later, it can also be dug out and transferred again.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

[0041] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0042] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A movable grounding grid device for use in arid areas, comprising a foundation pit (1) opened on the ground and a plurality of grounding electrodes (5), characterized in that: A plurality of the grounding electrodes (5) are connected together via a mounting frame, and the grounding electrodes (5) are erected via the mounting frame and placed in a foundation pit (1), wherein the foundation pit (1) is filled with a resistance reducing agent.

2. The movable grounding grid device for arid areas according to claim 1 is characterized in that: The mounting frame comprises a central column (6), the lower part of which is fixedly provided with adjustable fixing plates corresponding to the number of grounding electrodes (5), one end of the adjustable fixing plate being fixedly connected to the central column (6), and the other end of the adjustable fixing plate being provided with a pipe clamp (9), and the grounding electrode (5) being connected to the adjustable fixing plate via the pipe clamp (9).

3. The movable grounding grid device for arid areas according to claim 2 is characterized in that: The adjustable fixing plate comprises a first fixing plate (7) and a second fixing plate (8), wherein the first fixing plate (7) and the second fixing plate (8) are fixedly connected via two bolts (11).

4. The movable grounding grid device for arid areas according to claim 3 is characterized in that: The inner end of the first fixing plate (7) is fixedly connected to the central column (6), and the outer end of the second fixing plate (8) is fixedly connected to the pipe clamp (9).

5. The movable grounding grid device for arid areas according to claim 3 is characterized in that: A connection frame (12) is also fixedly arranged at the lower part of the central column (6), and the connection frame (12) is located below the adjustable fixing plate. The connection frame (12) is fixedly arranged with the same number of graphite soft belts (10) as the grounding electrode body (5), and one end of the graphite soft belt (10) is fixedly connected to the connection frame (12), and the other end is fixedly connected to the outer end of the second fixing plate (8).

6. The movable grounding grid device for arid areas according to claim 2, characterized in that: A lifting ring (2) is fixedly provided on the top of the central column (6).

7. The movable grounding grid device for arid areas according to claim 1, characterized in that: A lead wire (4) is fixedly arranged on the upper part of the grounding electrode body (5), a grounding bar (3) is fixedly arranged on the upper end of the lead wire (4), and the grounding bar (3) is exposed to the ground.

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