Segmented continuous corrosion-resistant vertical grounding electrode

Abstract

A segmented continuous corrosion-resistant vertical grounding electrode relates to the technical field of power system grounding, and comprises a grounding electrode main body and a drill bit located at one end of the grounding electrode main body, the grounding electrode main body is formed by splicing a plurality of grounding electrode split bodies, and each grounding electrode split body comprises a grounding electrode main body. A first connecting piece and a second connecting piece are fixedly arranged at the two ends of the grounding electrode body respectively, a mounting shaft is coaxially arranged at the end, away from the grounding electrode body, of the first connecting piece, and a clamping groove is formed in the mounting shaft; a first blind hole for insertion of the mounting shaft is coaxially formed in the end, away from the grounding electrode body, of the second connecting piece, and a first clamping spring which can extend into the clamping groove and is used for fixing the mounting shaft in the first blind hole is arranged in the first blind hole. The mounting shaft is inserted into the first blind hole and is connected by the first snap spring, so that the joint between two adjacent grounding electrode bodies is prevented from loosening, and the performance of the grounding electrode is improved.

Description

Technical Field

[0001] This utility model relates to the field of power system grounding technology, specifically a segmented, continuous corrosion-resistant vertical grounding electrode. Background Technology

[0002] A good grounding electrode can reduce the probability of power system tripping due to lightning strikes, thus ensuring the safety of people moving near the grounding electrode. Due to the scarcity of urban construction land, some substations have to be built in areas with high soil resistivity. To reduce grounding resistance, deep-well grounding electrodes are often used. Specifically, a deep well is drilled, and then a vertical grounding electrode of equal depth and length is placed into the borehole, with the gaps filled with a low-resistivity material to effectively reduce grounding resistance. This method has a significant resistance reduction effect, but it requires deep well drilling, resulting in high investment costs, and is difficult to construct in urban areas. Furthermore, vertical grounding electrodes have a segmented structure, with a maximum single installation length exceeding 20 meters. This solves the grounding resistance reduction problem for power facilities in areas with limited excavation space to some extent. However, adjacent segments are connected by threads, and the impact and vibration during installation can easily loosen the connection, thus affecting the performance of the vertical grounding electrode. Utility Model Content

[0003] To address the problem of loose connections between adjacent grounding electrode sections during installation in existing technologies, this invention provides a segmented, continuous, corrosion-resistant vertical grounding electrode that prevents loosening at the connection between adjacent grounding electrode bodies, thereby improving its performance.

[0004] To achieve the above objectives, the specific solution adopted by this utility model is as follows: a segmented, continuous, corrosion-resistant vertical grounding electrode, comprising a grounding electrode body and a drill bit located at one end of the grounding electrode body. The grounding electrode body is formed by splicing multiple grounding electrode segments. Each grounding electrode segment includes a grounding electrode body. A first connecting member and a second connecting member are respectively fixedly provided at both ends of the grounding electrode body. The end of the first connecting member opposite to the grounding electrode body is coaxially provided with an installation shaft, and a slot is provided on the installation shaft. The end of the second connecting member opposite to the grounding electrode body is coaxially provided with a first blind hole for inserting the installation shaft, and a first retaining spring that can extend into the slot to fix the installation shaft in the first blind hole is provided in the first blind hole.

[0005] As an optimized solution for the above-mentioned segmented, continuous, corrosion-resistant vertical grounding electrode: the first connector has a first mounting groove coaxially formed at one end near the grounding electrode body, and the grounding electrode body is inserted into the first mounting groove and fixedly connected to the first connector; the second connector has a second mounting groove coaxially formed at one end near the grounding electrode body, and the grounding electrode body is inserted into the second mounting groove and fixedly connected to the second connector.

[0006] As another optimized solution for the segmented, continuous corrosion-resistant vertical grounding electrode mentioned above: an annular groove for accommodating the retaining ring is provided on the inner wall surrounding the first blind hole.

[0007] As another optimized solution for the above-mentioned segmented, continuous corrosion-resistant vertical grounding electrode: the outer wall of the mounting shaft is provided with knurling.

[0008] As another optimized solution for the above-mentioned segmented, continuous corrosion-resistant vertical grounding electrode: a sealing groove is provided around the outer side wall of the bottom end of the mounting shaft; a sealing ring is provided in the sealing groove.

[0009] As another optimized solution for the above-mentioned segmented, corrosion-resistant vertical grounding electrode, the sealing ring is made of rubber.

[0010] As another optimized solution for the above-mentioned segmented connection corrosion-resistant vertical grounding electrode: one end of the drill bit is tapered, and the other end of the drill bit is coaxially provided with a second blind hole, and the mounting shaft can be inserted into the second blind hole and fixed in the second blind hole.

[0011] As another optimized solution for the above-mentioned segmented, corrosion-resistant vertical grounding electrode: the second blind hole is provided with a second retaining ring that can extend into the retaining groove to fix the mounting shaft in the second blind hole.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1) This utility model provides a segmented, continuous, corrosion-resistant vertical grounding electrode. The two adjacent grounding electrode bodies are connected by inserting the mounting shaft of the first connector into the first blind hole of the second connector, and then using the first snap ring. The end of the first grounding electrode body is connected to a drill bit, which prevents the two adjacent grounding electrode bodies from loosening due to impact and vibration during the installation of the grounding electrode, thereby improving the stability of the grounding electrode.

[0014] 2) In this utility model, the mounting shaft is provided with knurling. The mounting shaft and the first blind hole with knurling interference fit can realize the rapid combination and tight connection of the grounding electrode, and increase the tensile strength of the connecting parts.

[0015] 3) In this utility model, a sealing groove is provided at the bottom end of the mounting shaft, and a sealing ring is provided in the sealing groove to play a sealing role. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the grounding electrode;

[0017] Figure 2 This is a cross-sectional view of the grounding electrode body;

[0018] Figure 3 This is a cross-sectional view of the drill bit;

[0019] Reference numerals: 1. Drill bit; 2. Grounding electrode body; 3. First connector; 4. Second connector; 5. Mounting shaft; 6. First blind hole; 7. First snap ring; 8. First mounting groove; 9. Second mounting groove; 10. Annular groove; 11. Slot; 12. Knurling; 13. Sealing groove; 14. Sealing ring; 15. Second blind hole; 16. Second snap ring. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art, such as how the grounding electrode body is fixed in the first mounting groove and the second mounting groove.

[0021] Example 1

[0022] like Figure 1 As shown, a segmented, continuous, corrosion-resistant vertical grounding electrode includes a grounding electrode body and a drill bit 1 located at one end of the grounding electrode body. The grounding electrode body is formed by splicing multiple grounding electrode segments. Each grounding electrode segment includes a grounding electrode body 2. The grounding electrode body 2 is made of stainless steel-clad composite material and is cylindrical in shape. A first connector 3 and a second connector 4 are fixedly provided at both ends of the grounding electrode body 2. Both the first connector 3 and the second connector 4 are made of stainless steel.

[0023] The first connector 3 has a first mounting groove 8 coaxially formed at one end near the grounding electrode body 2. The diameter of the first mounting groove 8 is equal to that of the grounding electrode body 2, and the grounding electrode body 2 is inserted into the first mounting groove 8 and fixedly connected to the first connector 3. In this embodiment, the connection method is hydraulic connection. The second connector 4 has a second mounting groove 9 coaxially formed at one end near the grounding electrode body 2. The diameter of the second mounting groove 8 is equal to that of the grounding electrode body 2, and the grounding electrode body 2 is inserted into the second mounting groove 9 and fixedly connected to the second connector 4. In this embodiment, the connection method is hydraulic connection.

[0024] The first connector 3 has a mounting shaft 5 coaxially disposed at one end opposite to the grounding electrode body 2. The diameter of the mounting shaft 5 is smaller than the diameter of the first connector 3. The shaft body of the mounting shaft 5 is cylindrical, and the top end of the shaft body is conical. The outer wall of the mounting shaft 5 is provided with knurling 12, which is a mesh pattern formed by two sets of diagonal lines in different directions. A groove 11 is provided around the axial direction of the mounting shaft 5. The second connector 4 has a first blind hole 6 coaxially disposed at one end opposite to the grounding electrode body 2 for inserting the mounting shaft 5. The size of the first blind hole 6 is equal to the size of the mounting shaft 5. An annular groove 10 is provided around the inner wall of the first blind hole 6, located near the opening of the first blind hole 6. A first retaining spring 7 is disposed in the first blind hole 6, which can extend into the groove 11 to fix the mounting shaft 5 in the first blind hole 6. The outer diameter of the first retaining spring 7 is larger than the diameter of the first blind hole 6, and the inner diameter of the first retaining spring 7 is smaller than the diameter of the first blind hole 6.

[0025] The drill bit 1 is made of cemented carbide. One end of the drill bit 1 is tapered, and the other end is cylindrical. A second blind hole 15 is coaxially formed along the drill bit 1. The inner diameter of the second blind hole 15 is smaller than the diameter of the cylindrical portion of the drill bit 1, and the depth of the second blind hole 15 is smaller than the length of the cylindrical portion of the drill bit 1. The second blind hole 15 is provided with a second retaining spring 16 that can extend into the retaining groove 11 to fix the mounting shaft 5 within the second blind hole 15. The second retaining spring 16 is located at the opening of the second blind hole 15. The mounting shaft 5 can be inserted into and fixed within the second blind hole 15. The drill bit 1 and the grounding electrode body 2 are fixedly connected through the second retaining spring 16.

[0026] The process of installing a grounding electrode: Insert one end of a grounding electrode body 2 with the mounting shaft 5 into the second blind hole 15 of the drill bit 1. The second retaining ring 16 of the second blind hole 15 is precisely engaged in the annular groove 10 of the mounting shaft 5. When a longer grounding electrode is required, insert one end of a grounding electrode body 2 with the mounting shaft 5 into one end of the first blind hole 6 of the grounding electrode body 2 which is fixedly connected to the drill bit 1, so that the two adjacent grounding electrodes are fixedly connected separately. Repeat this operation until the required length of the grounding electrode is reached.

[0027] Example 2

[0028] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in:

[0029] like Figure 2As shown, a sealing groove 13 is arranged around the outer wall of the bottom end of the mounting shaft 5. The cross-section of the sealing groove 13 is semi-circular. A sealing ring 14 is provided inside the sealing groove 13, and the sealing groove 13 and the sealing ring 14 are fixed together by adhesive. The sealing ring 14 is "O" shaped and made of rubber. The sealing ring 14 can prevent moisture and corrosive ions in the soil from entering the interior of the connector and causing corrosion, thereby avoiding the problem of degradation of the mechanical and electrical properties of the first connector 3 and the second connector 4 due to corrosion.

[0030] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A segmented, continuous, corrosion-resistant vertical grounding electrode, characterized in that: The device includes a grounding electrode body (2) and a drill bit (1) located at one end of the grounding electrode body. The grounding electrode body is formed by splicing multiple grounding electrode segments. The grounding electrode segments include the grounding electrode body (2). The grounding electrode body (2) is made of stainless steel-clad steel composite material. The grounding electrode body (2) is fixedly provided with a first connector (3) and a second connector (4) at its two ends. The first connector (3) is coaxially provided with an installation shaft (5) at one end away from the grounding electrode body (2), and a slot (11) is provided on the installation shaft (5). The second connector (4) is coaxially provided with a first blind hole (6) for the installation shaft (5) to be inserted at one end away from the grounding electrode body (2), and a first snap ring (7) is provided in the first blind hole (6) that can extend into the slot (11) to fix the installation shaft (5) in the first blind hole (6).

2. The segmented, continuous, corrosion-resistant vertical grounding electrode as described in claim 1, characterized in that: The first connector (3) has a first mounting groove (8) coaxially opened at one end near the grounding electrode body (2), and the grounding electrode body (2) is inserted into the first mounting groove (8) and fixedly connected to the first connector (3); the second connector (4) has a second mounting groove (9) coaxially opened at one end near the grounding electrode body (2), and the grounding electrode body (2) is inserted into the second mounting groove (9) and fixedly connected to the second connector (4).

3. The segmented, continuous, corrosion-resistant vertical grounding electrode as described in claim 1, characterized in that: An annular groove (10) for accommodating the first snap ring (7) is provided on the inner wall surrounding the first blind hole (6).

4. A segmented, continuous, corrosion-resistant vertical grounding electrode as described in claim 1, characterized in that: The outer wall of the mounting shaft (5) is provided with knurling (12).

5. A segmented, continuous, corrosion-resistant vertical grounding electrode as described in claim 1, characterized in that: A sealing groove (13) is provided around the outer wall of the bottom end of the mounting shaft (5); a sealing ring (14) is provided in the sealing groove (13).

6. A segmented, continuous, corrosion-resistant vertical grounding electrode as described in claim 5, characterized in that: The sealing ring (14) is made of rubber.

7. A segmented, continuous, corrosion-resistant vertical grounding electrode as described in claim 1, characterized in that: One end of the drill bit (1) is tapered, and the other end of the drill bit (1) is coaxially provided with a second blind hole (15). The mounting shaft (5) can be inserted into the second blind hole (15) and fixed in the second blind hole (15).

8. A segmented, continuous, corrosion-resistant vertical grounding electrode as described in claim 7, characterized in that: The second blind hole (15) is provided with a second retaining ring (16) that can extend into the retaining groove (11) for fixing the mounting shaft (5) in the second blind hole (15).

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