Split type grounding electrode and carbon fiber composite complete grounding device
By using a split grounding electrode and a complete set of carbon fiber composite grounding devices, a multi-dimensional conductive network is formed by combining graphite and carbon fiber. This solves the problems of difficult construction and low resistance reduction efficiency of traditional grounding devices in high-altitude areas, and achieves efficient grounding effect and convenient construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SIPING POWER SUPPLY COMPANY OF STATE GRID JILINSHENG ELECTRIC POWER SUPPLY
- Filing Date
- 2025-04-22
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional grounding devices are costly to construct in high-altitude areas and have low resistance reduction efficiency. In particular, they are difficult to effectively reduce the inductive effect of lightning impulse current in environments with high soil resistivity. Furthermore, traditional grounding materials cannot simultaneously solve the problems of corrosion, construction difficulties, and resistance reduction difficulties.
The system employs a split-type grounding electrode and a carbon fiber composite grounding device. By combining a solid graphite grounding rod with a copper movable hammer, it utilizes the high conductivity of carbon fiber and the excellent ionic conductivity of graphite to form a multi-dimensional conductive network. Combined with the detachable design of the movable hammer, it enables rapid connection and construction.
It improves the construction efficiency and resistance reduction effect of grounding devices, especially significantly improving the current dissipation efficiency in areas with high soil resistivity, simplifying the construction process and reducing project costs.
Smart Images
Figure CN224248963U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power equipment grounding technology, specifically to a split grounding electrode and a carbon fiber composite complete grounding device. Background Technology
[0002] Due to the special operating environment and the complexity of engineering systems, grounding systems have significant research value at both the theoretical and practical levels. However, influenced by multiple factors, grounding technology research exhibits significant complexity, especially in high-altitude areas such as Tibet, which face special working conditions such as extremely high soil resistivity, significant geological stratification (often alternating layers of permafrost and rock), and harsh corrosive environments. Traditional grounding engineering generally suffers from technical bottlenecks such as high construction costs and low resistance reduction efficiency.
[0003] Traditional grounding designs are often limited to horizontal grounding. In areas where resistance reduction is difficult, increasing the length of radial grounding electrodes is commonly used. However, increasing the length of radial grounding electrodes only has a limited effect on reducing power frequency grounding resistance. It creates a strong inductive effect for high-frequency lightning impulse currents, hindering their propagation along the horizontal grounding electrodes. Studies show that when the length of the horizontal grounding electrode exceeds 100m, further increases in length do not reduce impulse grounding impedance. Single grounding materials, such as galvanized steel, grounding modules, copper-clad steel, and graphite-based flexible grounding electrodes, struggle to simultaneously address issues like corrosion, construction difficulties, resistance reduction challenges due to high soil resistivity, difficulties in excavation-restricted construction, and high project costs. To address these problems with single grounding materials, many existing technologies combine individual grounding materials to form complete grounding systems, such as the complete grounding system described in Reference 1.
[0004] Reference 1: Chinese patent document with publication number CN216872276U
[0005] Reference 1 describes a complete grounding device, which includes a junction box and several grounding elements. The grounding elements are detachably connected through the junction box. The junction box has a channel that runs through it, and a pressure plate is provided inside the channel. Each grounding element has a connecting end that is inserted into the channel. Two connecting ends to be connected are respectively inserted into the channel. When two connecting ends are connected, the pressure plate presses them together. When two connecting ends are disassembled, the pressure plate loosens them. The grounding elements in the complete grounding device can be quickly assembled and their layout can be quickly changed, offering advantages such as flexible layout and ease of operation. Utility Model Content
[0006] The purpose of this utility model is to enrich the technical routes of complete grounding devices and provide a split grounding electrode and a carbon fiber composite complete grounding device.
[0007] To address the shortcomings of the aforementioned technical problems, the present invention adopts the following technical solution: a split-type grounding electrode, comprising a grounding tip and multiple solid graphite grounding rods, wherein the multiple solid graphite grounding rods are connected in series end to end, the grounding tip is connected to the head end of the frontmost solid graphite grounding rod, and a copper movable hammer head is connected to the tail end of the rearmost solid graphite grounding rod. The movable hammer head includes a first and a second threading channel arranged side by side, both of which are flat holes.
[0008] As a further optimization of the split grounding electrode of this utility model: the upper inner wall and the lower inner wall of the first and second threading channels are provided with protrusions, and the top contour of the protrusions is a smoothly transitioned curved surface.
[0009] As a further optimization of the split grounding electrode of this utility model: the upper inner wall of the first threading channel and the lower inner wall of the second threading channel are provided with spike-like protrusions.
[0010] As a further optimization of the split grounding electrode of this utility model: the middle of the inner wall of the first and second threading channels is provided with ribs.
[0011] As a further optimization of the split-type grounding electrode of this utility model: the material of the movable hammer head is pure copper or oxygen-free copper.
[0012] As a further optimization of the split-type grounding electrode of this utility model: a steel fixing seat is also provided at the tail of the solid graphite grounding rod at the last end. The upper end face of the fixing seat is provided with a fixing hole with internal thread, and the lower end face of the movable hammer is provided with a fixing post that can be screwed into the fixing hole.
[0013] As a further optimization of the split-type grounding electrode of this utility model: the fixing base is made of stainless steel, copper-clad steel or galvanized steel.
[0014] This utility model also provides a complete set of carbon fiber composite grounding devices, including a grounding down conductor, a carbon fiber composite graphite blanket, a carbon fiber composite graphite strip, a connector, and the above-mentioned split grounding electrode. The connector is used for the connection between carbon fiber composite graphite strips and the connection between the carbon fiber composite graphite strip and the grounding down conductor.
[0015] The grounding down conductor includes a connector and a down conductor body. The connector is located at one end of the down conductor body and is used to connect to the transmission tower. The outer wall of the down conductor body is provided with a graphene coating and an epoxy resin coating from the inside to the outside.
[0016] Both the carbon fiber composite graphite blanket and the carbon fiber composite graphite tape are woven from carbon fiber graphite threads, and the width and thickness of the carbon fiber composite graphite blanket are greater than those of the carbon fiber composite graphite tape.
[0017] As a further optimization of the carbon fiber composite grounding device of this utility model: the carbon fiber graphite wire is made by twisting narrow strips of carbon fiber graphite composite film into a wire, and the carbon fiber graphite composite film is made of expanded graphite and carbon fiber composite.
[0018] As a further optimization of the carbon fiber composite grounding device of this utility model: the connector is a wedge-shaped non-metallic clamp.
[0019] This invention has the following advantages: The grounding electrode of this invention has a detachable movable hammer head, which can be quickly connected to the graphite strip, making construction convenient. Combining this grounding electrode with carbon fiber composite graphite strip / blanket utilizes the high conductivity of carbon fiber and the excellent ionic conductivity of graphite to form a multi-dimensional conductive network, effectively improving current dissipation efficiency, and is especially suitable for areas with high soil resistivity. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of the split-type grounding electrode in Example 1;
[0021] Figure 2 This is a schematic diagram of the movable hammer head in the split-type grounding electrode of Example 1;
[0022] Figure 3 This is a schematic diagram of the movable hammer (connected to the graphite strip) in the split-type grounding electrode of Example 1;
[0023] Figure 4 This is a schematic diagram of the movable hammer head in the split-type grounding electrode of Example 1 (Form 1);
[0024] Figure 5 This is a schematic diagram of the movable hammer head in the split-type grounding electrode of Example 1 (Form 2);
[0025] Figure 6 This is a schematic diagram of the movable hammer head in the split-type grounding electrode of Example 1 (Form 3);
[0026] Figure 7 This is a schematic diagram of the complete grounding device in Example 2;
[0027] Figure 8 This is a schematic diagram showing the connection relationship between the graphite strips in the complete grounding device of Example 2;
[0028] Marked in the image:
[0029] 1. Sharp point that sinks into the ground;
[0030] 2. Graphite grounding rod;
[0031] 3. Movable hammerhead;
[0032] 301. First threading channel;
[0033] 302. Second threading channel;
[0034] 303. Protrusion;
[0035] 304, ribs;
[0036] 4. Fixture;
[0037] 5. Fixed column;
[0038] 6. Grounding down conductor;
[0039] 7. Carbon fiber composite graphite blanket;
[0040] 8. Carbon fiber composite graphite tape;
[0041] 9. Connector. Detailed Implementation
[0042] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.
[0043] <Example 1>
[0044] like Figure 1-3 As shown: A split-type grounding electrode includes a grounding tip 1 and multiple solid graphite grounding rods 2, which are connected in series end to end. The grounding tip 1 is connected to the head end of the foremost solid graphite grounding rod 2. A copper movable hammer head 3 (made of pure copper or oxygen-free copper) is connected to the tail end of the last solid graphite grounding rod 2. The movable hammer head 3 includes a first threading channel 301 and a second threading channel 302 arranged side by side, both of which are flat holes.
[0045] The structure of the solid graphite grounding rod 2 and the connection method between adjacent solid graphite grounding rods 2 are described in the applicant's patent (publication number CN 111555051 A), and will not be detailed here.
[0046] A steel fixing seat 4 (made of stainless steel, copper-clad steel, or galvanized steel) is also provided at the tail end of the solid graphite grounding rod 2. The steel fixing seat 4 is welded to the graphite grounding rod 2. The upper end face of the fixing seat 4 is provided with a fixing hole with internal thread, and the lower end face of the movable hammer head 3 is provided with a fixing post 5 that can be screwed into the fixing hole.
[0047] During construction, the grounding electrode is first inserted into the soil at the grounding location by hammering the fixing base 4, with 2 / 3 or half its length inserted. Then, the movable hammer head 3 is connected to the fixing base 4. The carbon fiber composite graphite strip 8 is first passed through the second threading channel 302, then bent and passed through the first threading channel 301. Finally, the movable hammer head 3 is hammered again. During the hammering process, because the movable hammer head 3 is made of copper (pure copper or oxygen-free copper), the first and second threading channels 301 and 302 deform during the hammering, squeezing the graphite strip tightly. When the entire grounding electrode is in the ground, the connection between the graphite strip and the grounding electrode is completed.
[0048] To achieve better compression of the graphite belt by the first threading channel 301 and the second threading channel 302 during deformation, the following three forms can be adopted:
[0049] like Figure 4 As shown, in Form 1, both the upper and lower inner walls of the first threading channel 301 and the second threading channel 302 are provided with protrusions 303, and the top contour of the protrusions 303 is a smoothly transitioned curved surface.
[0050] like Figure 5 As shown, in Form 2: the upper inner wall of the first threading channel 301 and the lower inner wall of the second threading channel 302 are provided with spike-like protrusions 303.
[0051] like Figure 6 As shown, Form 3: Ribs 304 are provided in the middle of the inner wall of the first threading channel 301 and the second threading channel 302.
[0052] The grounding electrode has a detachable movable hammer head that can be quickly connected to a graphite strip, making construction convenient.
[0053] <Example 2>
[0054] like Figure 7 and 8 As shown: A carbon fiber composite grounding device includes a grounding down conductor 6, a carbon fiber composite graphite blanket 7, a carbon fiber composite graphite strip 8, a connector 9, and the split grounding electrode 5 described in <Example 1>. The connector 9 is used for connecting the carbon fiber composite graphite strips 8 and for connecting the carbon fiber composite graphite strips 8 to the grounding down conductor 6. The connector 9 is a wedge-shaped non-metallic clamp. It should be noted that the applicant's patented product (publication number CN206585082U) can be used.
[0055] The grounding down conductor 6 includes a connector and a down conductor body. The connector is located at one end of the down conductor body and is used to connect to the transmission tower. The outer wall of the down conductor body is coated with a graphene coating and an epoxy resin coating from the inside out. The down conductor body is made of high-purity annealed copper-clad steel stranded wire, and the copper-steel metallurgical bond is achieved through a cold drawing process, which combines high conductivity (DC resistance ≤0.39Ω / km at 20℃) and mechanical strength. Then, a three-dimensional graphene coating and an epoxy resin coating are deposited on the outer wall of the down conductor body.
[0056] Both the carbon fiber composite graphite blanket 7 and the carbon fiber composite graphite tape 8 are woven from carbon fiber graphite threads. The width and thickness of the carbon fiber composite graphite blanket 7 are greater than those of the carbon fiber composite graphite tape 8. The carbon fiber graphite threads are made by twisting narrow strips of a carbon fiber graphite composite film, which is made of expanded graphite and carbon fiber. Both the carbon fiber composite graphite blanket 7 and the carbon fiber composite graphite tape 8 can be existing products.
[0057] The grounding electrode is combined with carbon fiber composite graphite tape / blanket, which utilizes the high conductivity of carbon fiber and the excellent ionic conductivity of graphite to form a multi-dimensional conductive network, effectively improving the current dissipation efficiency, and is especially suitable for areas with high soil resistivity.
[0058] This invention innovatively employs a technical solution combining carbon fiber composite graphite strip / blanket with a grounding module. Leveraging the high conductivity of carbon fiber and the excellent ionic conductivity of graphite, a multi-dimensional conductive network is constructed, enabling faster and more uniform current diffusion, thereby significantly improving current dissipation efficiency. In practical applications, the movable hammer head equipped with the grounding module allows for a quick and stable connection with the graphite strip, greatly simplifying the construction process and shortening the construction cycle.
[0059] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.
Claims
1. A split-type grounding electrode, comprising a grounding tip (1) and a plurality of solid graphite grounding rods (2), wherein the plurality of solid graphite grounding rods (2) are connected in series end to end, and the grounding tip (1) is connected to the head end of the foremost solid graphite grounding rod (2), characterized in that: The tail end of the solid graphite grounding rod (2) at the rear end is connected to a copper movable hammer head (3). The movable hammer head (3) includes a first threading channel (301) and a second threading channel (302) arranged side by side. Both the first threading channel (301) and the second threading channel (302) are flat holes.
2. The split-type grounding electrode as described in claim 1, characterized in that: The upper inner wall and the lower inner wall of the first threading channel (301) and the second threading channel (302) are provided with protrusions (303), and the top contour of the protrusions (303) is a smoothly transitioned curved surface.
3. A split-type grounding electrode as described in claim 1, characterized in that: The upper inner wall of the first threading channel (301) and the lower inner wall of the second threading channel (302) are provided with spike-like protrusions (303).
4. A split-type grounding electrode as described in claim 1, characterized in that: Ribs (304) are provided in the middle of the inner wall of the first threading channel (301) and the second threading channel (302).
5. A split-type grounding electrode as described in claim 1, characterized in that: The movable hammer (3) is made of pure copper or oxygen-free copper.
6. A split-type grounding electrode as described in claim 1, characterized in that: A steel fixing seat (4) is also provided at the tail of the solid graphite grounding rod (2) at the rear end. The upper end face of the fixing seat (4) is provided with a fixing hole with internal thread. The lower end face of the movable hammer (3) is provided with a fixing post (5) that can be screwed into the fixing hole.
7. A split-type grounding electrode as described in claim 6, characterized in that: The fixing base (4) is made of stainless steel, copper-clad steel or galvanized steel.
8. A carbon fiber composite grounding device, characterized in that: It includes a grounding down conductor (6), a carbon fiber composite graphite blanket (7), a carbon fiber composite graphite strip (8), a connector (9), and a split grounding electrode as described in any one of claims 1-7. The connector (9) is used for connecting the carbon fiber composite graphite strips (8) to each other and connecting the carbon fiber composite graphite strips (8) to the grounding down conductor (6). The grounding down conductor (6) includes a connector and a down conductor body. The connector is located at one end of the down conductor body and is used to connect with the transmission tower. The outer wall of the down conductor body is provided with a graphene coating and an epoxy resin coating from the inside to the outside. Both the carbon fiber composite graphite blanket (7) and the carbon fiber composite graphite strip (8) are woven from carbon fiber graphite threads. The width and thickness of the carbon fiber composite graphite blanket (7) are greater than those of the carbon fiber composite graphite strip (8).
9. The carbon fiber composite grounding device as described in claim 8, characterized in that: The carbon fiber graphite wire is made by twisting narrow strips of carbon fiber graphite composite film into a wire, and the carbon fiber graphite composite film is made of expanded graphite and carbon fiber.
10. The carbon fiber composite grounding device as described in claim 8, characterized in that: The connector (9) is a wedge-shaped non-metallic clamp.