Graphite grounding resistance reduction module

Abstract

The utility model discloses a graphite grounding resistance reduction module relates to graphite grounding resistance reduction module technical field, the utility model discloses a resistance reduction module main part, the inner chamber of resistance reduction module main part is provided with the metal frame, the top and bottom of metal frame all are fixedly connected with the connecting terminal, the outside of resistance reduction module main part is provided with the stress resistance component. The primary advantage of the utility model is that the stress resistance ability is improved obviously, can adapt to complex geological environment, and the bottom ground -inserting structure reduces the installation resistance, ensures the stable installation, and the core "semicircular groove and semicircular block" inlay design can convert the concentrated stress into interlayer sliding friction and displacement when the soil produces irregular stress because of uneven, settlement or temperature change, disperses to greater contact area, and through the self deformation adaptation soil, avoids the crack, the fragmentation of graphite material because of the compressive strength deficiency, guarantees the continuity of grounding passage, maintains the stability of grounding resistance.

Description

Technical Field

[0001] This utility model belongs to the technical field of graphite grounding resistance reduction modules, and in particular relates to a graphite grounding resistance reduction module. Background Technology

[0002] Grounding systems are a key component for the safe operation of power and communication facilities. Their core function is to effectively reduce grounding resistance and quickly conduct fault currents, lightning currents, etc., into the earth to avoid equipment damage or personal injury. Graphite grounding resistance reduction modules, as one of the mainstream grounding materials, have been widely replaced by traditional metal grounding electrodes (such as galvanized steel, copper rods, etc.) due to their excellent conductivity, corrosion resistance, environmental friendliness, and ease of construction. They are widely used in various grounding projects.

[0003] A Chinese patent application with publication number CN104538750B discloses a graphite-type grounding resistance reduction module, including a graphite body and electrodes connected to the graphite body. The graphite body is cylindrical, and its outer surface is formed by 8-12 inwardly concave arc surfaces. The graphite body has multiple through holes along its axial direction. With the arrangement of arc surfaces and through holes, the graphite-type grounding resistance reduction module of this invention can more effectively reduce grounding resistance, has high corrosion resistance, and has a wide range of applications.

[0004] Although this patent can effectively reduce grounding resistance and has high corrosion resistance, it still has the disadvantage of poor stress resistance. In geological environments with uneven soil (such as local clay and local sand and gravel) or large particles, the contact pressure distribution between the module and the soil is uneven, which can easily lead to local stress concentration at the particle protrusions. When the stress exceeds the compressive strength of the graphite material, the module is prone to cracking and breaking, which not only disrupts the continuity of the grounding path but may also cause a sharp increase in grounding resistance, resulting in the loss of grounding protection. In addition, traditional single-layer modules have poor thermal stability. Under the impact of large currents such as lightning strikes, local heat is difficult to dissipate quickly, which can easily cause the graphite material to carbonize due to high temperature, further reducing conductivity and shortening the module's service life.

[0005] To address these issues, we provide a graphite grounding resistance reduction module. Utility Model Content

[0006] The purpose of this utility model is to provide a graphite grounding resistance reduction module. By combining the main body of the resistance reduction module and the stress-resistant component, it solves the problem that the existing graphite grounding resistance reduction modules have poor stress resistance and are prone to cracking and breaking in geological environments with uneven soil (such as local clay and local sand and gravel) or large particles.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to a graphite grounding resistance reduction module, comprising a resistance reduction module body. A metal frame is provided within the inner cavity of the resistance reduction module body. Connection terminals are fixedly connected to the top and bottom of the metal frame. An anti-stress component is provided on the outer side of the resistance reduction module body. The anti-stress component includes an inner semi-circular groove formed on the surface of the resistance reduction module body. An inner semi-circular block is provided within the inner cavity of the inner semi-circular groove. An inner ring module is fixedly connected to the side of the inner semi-circular block away from the inner semi-circular groove. An outer semi-circular groove is formed on the surface of the inner ring module. An outer semi-circular block is provided within the inner cavity of the outer semi-circular groove. An outer ring module is fixedly connected to the side of the outer semi-circular block away from the outer semi-circular groove.

[0009] The present invention is further configured such that a protective shell is fixedly connected to the surface of the outer ring module, and the surface of the protective shell is provided with permeable holes. The protective shell can protect the surface of the outer ring module, prevent external force from damaging the outer ring module, and slow down the corrosion rate of the outer ring module. A certain gap is left between the protective shell and the outer ring module. During installation, conductive physical resistance-reducing backfill is installed in the gap. It reduces the contact resistance by tightly wrapping the outer ring module, and maintains the long-term moisture of the soil around the outer ring module by utilizing its excellent hygroscopic and moisture-retaining properties, thus stabilizing the grounding resistance.

[0010] The present invention is further configured such that a first flexible connecting strip is fixedly connected to the surface of the main body of the drag-reducing module. The side of the first flexible connecting strip away from the main body of the drag-reducing module is fixedly connected to the inner wall of the inner ring module. The material of the first flexible connecting strip is copper wire braided strip. This material can not only ensure a stable connection between the main body of the drag-reducing module and the inner ring module, but also further enhance the overall conductivity. Moreover, due to its flexibility, it can adapt to changes in soil shape and stress within a certain range. For example, when the soil undergoes slight or uneven settlement, the flexible connecting strip can bend and deform accordingly, avoiding loosening or breakage of the interlayer connection due to soil movement.

[0011] The present invention is further configured such that a second flexible connecting strip is fixedly connected to the surface of the inner ring module, and the side of the second flexible connecting strip away from the inner ring module is fixedly connected to the inner wall of the outer ring module. The material of the second flexible strip is copper wire braided strip. This material can not only ensure a stable connection between the inner ring resistance reduction module and the outer ring module, but also further enhance the overall conductivity. Moreover, due to its flexibility, it can adapt to changes in soil shape and stress within a certain range, thereby improving the stress resistance performance of the graphite grounding resistance reduction module.

[0012] The present invention is further configured such that a grounding ring is fixedly connected to the bottom of the outer ring module, and a conical rod is fixedly connected to the bottom of the grounding ring. The grounding structure composed of the grounding ring and the conical rod can be inserted into the soil more conveniently, making the graphite grounding resistance reduction module more stable when buried in the soil.

[0013] The present invention is further configured such that an anti-detachment ring is fixedly connected to the surface of the connecting terminal, the anti-detachment ring being made of the same material as the connecting terminal, and multiple anti-detachment rings are provided on the surface of the connecting terminal. The anti-detachment rings can increase the friction of the surface of the connecting terminal, making it easier to connect with the connecting lead and less prone to detachment.

[0014] The present invention is further configured such that a limiting plate is fixedly connected to the top of the main body of the resistance reduction module, and the tops of the inner ring module and the outer ring module are in contact with the bottom of the limiting plate. Multiple limiting plates can further improve the connection strength between the main body of the resistance reduction module, the inner ring module and the outer ring module, and the inner ring module and the outer ring module are movably connected to the limiting plate, which does not affect the overall stress resistance performance of the graphite grounding resistance reduction module.

[0015] The present invention has the following beneficial effects.

[0016] 1. The primary advantage of this utility model is its significantly improved stress resistance, enabling it to adapt to complex geological environments. Its bottom insertion structure reduces installation resistance and ensures stable installation. The core "semi-circular groove and semi-circular block" interlocking design can transform concentrated stress into interlayer sliding friction and displacement when the soil experiences irregular stress due to unevenness, settlement, or temperature changes. This disperses the stress to a larger contact area, allowing it to adapt to the soil through its own deformation. This prevents the graphite material from cracking or breaking due to insufficient compressive strength, ensuring the continuity of the grounding path and maintaining stable grounding resistance.

[0017] 2. Another advantage of this utility model is that thermal stability and service life are improved. During installation, conductive physical resistance-reducing backfill material is filled into the gap between the protective shell and the outer ring module and the soil around the module. This design helps to quickly dissipate local heat under the impact of large currents such as lightning strikes, reducing the carbonization of graphite materials caused by high temperature, thereby reducing the risk of decreased conductivity and extending the overall service life of the module. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional diagram of a graphite grounding resistance reduction module.

[0020] Figure 2 This is a bottom view schematic diagram of a graphite grounding resistance reduction module.

[0021] Figure 3 A graphite grounding resistance reduction module Figure 2 A magnified view of a portion of point A in the middle.

[0022] Figure 4 This is a schematic diagram of the grounding ring structure in a graphite grounding resistance reduction module.

[0023] Figure 5 This is a schematic diagram of the protective shell in a graphite grounding resistance reduction module.

[0024] In the attached diagram: 1. Resistance reduction module body; 2. Metal frame; 3. Connecting terminal; 4. Stress-resistant component; 401. Inner semi-circular groove; 402. Inner semi-circular block; 403. Inner ring module; 404. Outer semi-circular groove; 405. Outer semi-circular block; 406. Outer ring module; 5. Protective shell; 6. First flexible connecting strip; 7. Second flexible connecting strip; 8. Grounding ring; 9. Limiting plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Please see Figure 1-5 This utility model is a graphite grounding resistance reduction module, including a resistance reduction module body 1. A metal frame 2 is provided in the inner cavity of the resistance reduction module body 1. Connection terminals 3 are fixedly connected to the top and bottom of the metal frame 2. An anti-stress component 4 is provided on the outer side of the resistance reduction module body 1. The anti-stress component 4 includes an inner semi-circular groove 401, which is formed on the surface of the resistance reduction module body 1. An inner semi-circular block 402 is provided in the inner cavity of the inner semi-circular groove 401. An inner ring module 403 is fixedly connected to the side of the inner semi-circular block 402 away from the inner semi-circular groove 401. An outer semi-circular groove 404 is formed on the surface of the inner ring module 403. An outer semi-circular block 405 is provided in the inner cavity of the outer semi-circular groove 404. An outer ring module 406 is fixedly connected to the side of the outer semi-circular block 405 away from the outer semi-circular groove 404.

[0027] Specifically: the inner wall of the outer ring module 406 is provided with an outer semi-circular block 405, and the surface of the inner ring module 403 is provided with a corresponding outer semi-circular groove 404. The depth of the outer semi-circular groove 404 is slightly greater than that of the outer semi-circular block 405. The surface of the resistance reduction module body 1 is provided with an inner semi-circular groove 401, and the surface of the inner ring module 403 is provided with an inner semi-circular block 402. The depth of the inner semi-circular groove 401 is slightly greater than that of the inner semi-circular block 402. This interlocking method not only ensures a tight connection between layers, but also allows adjacent layers to have a certain degree of relative displacement when subjected to external force, thereby dispersing local stress. When the soil is uneven, such as with stones or stratification, the module can adapt to the soil shape through interlayer fine adjustment to avoid stress concentration. The multi-layer graphite structure itself has a redundant design. Even if a layer is broken by external force, other graphite layers can still maintain electrical connection through the first flexible connecting strip 6 and the second flexible connecting strip 7 to ensure that the current continues to be conducted.

[0028] A protective shell 5 is fixedly connected to the surface of the outer ring module 406. The surface of the protective shell 5 has permeable holes. A first flexible connecting strip 6 is fixedly connected to the surface of the drag-reducing module body 1. The side of the first flexible connecting strip 6 away from the drag-reducing module body 1 is fixedly connected to the inner wall of the inner ring module 403. A second flexible connecting strip 7 is fixedly connected to the surface of the inner ring module 403. The side of the second flexible connecting strip 7 away from the inner ring module 403 is fixedly connected to the inner wall of the outer ring module 406. A grounding ring 8 is fixedly connected to the bottom of the outer ring module 406. A tapered rod is fixedly connected to the bottom of the grounding ring 8. An anti-detachment ring is fixedly connected to the surface of the connecting terminal 3. The anti-detachment ring is made of the same material as the connecting terminal 3. A limiting plate 9 is fixedly connected to the top of the drag-reducing module body 1. The tops of both the inner ring module 403 and the outer ring module 406 are in contact with the bottom of the limiting plate 9.

[0029] Specifically: The protective shell 5 protects the surface of the outer ring module 406, preventing damage from external forces and slowing down corrosion. A gap is left between the protective shell 5 and the outer ring module 406. During installation, conductive physical resistance-reducing backfill is inserted into this gap. This backfill reduces contact resistance by tightly wrapping the outer ring module 406 and maintains long-term soil moisture around the outer ring module 406 using its excellent hygroscopic and moisture-retaining properties, thus stabilizing grounding resistance. The first flexible connecting strip 6 is made of copper wire braid. This material not only ensures a stable connection between the resistance-reducing module body 1 and the inner ring module 403 while further enhancing overall conductivity, but also, due to its flexibility, can adapt to changes in soil shape and stress within a certain range. For example, when slight or uneven soil settlement occurs, the flexible connecting strip can bend and deform accordingly, preventing loosening or breakage of the interlayer connection due to soil movement. The second flexible strip is made of copper wire braided strip. This material not only ensures a stable connection between the inner ring resistance reduction module and the outer ring module 406, but also enhances the overall conductivity. Due to its flexibility, it can adapt to changes in soil shape and stress within a certain range, thereby improving the stress resistance performance of the graphite grounding resistance reduction module. The insertion structure composed of the insertion ring 8 and the conical rod can be inserted into the soil more conveniently, making the graphite grounding resistance reduction module more stable when buried in the soil. Multiple anti-detachment rings are set on the surface of the connection terminal 3. The anti-detachment rings can increase the friction of the surface of the connection terminal 3, making it easier to connect with the connection lead and less likely to detach. Multiple limiting plates 9 can further improve the connection strength between the main body 1 of the resistance reduction module, the inner ring module 403 and the outer ring module 406. Both the inner ring module 403 and the outer ring module 406 are movably connected to the limiting plates 9, without affecting the overall stress resistance performance of the graphite grounding resistance reduction module.

[0030] The working principle of this utility model is as follows: The graphite grounding resistance reduction module is transported to the grounding construction point. Utilizing the insertion structure formed by the insertion ring 8 and the conical rod at the bottom of the graphite grounding resistance reduction module, it is pressed into the predetermined pit position mechanically or manually. The conical rod design reduces the initial embedding resistance, making installation more convenient and stable. After the graphite grounding resistance reduction module is placed, backfilling is performed. The key step is to fill the gap between the protective shell 5 and the outer ring module 406, and in the soil around the graphite grounding resistance reduction module, with conductive physical resistance-reducing backfill material. When irregular stress is generated in the soil due to uneven geological conditions, settlement, or temperature changes, the core stress-resistant component 4 of the graphite grounding resistance reduction module is activated, and stones or hard objects in the soil are dislodged. First, local pressure is generated on the outermost protective shell 5 or outer ring module 406. The pressure is transmitted to the outer ring module 406. Through the cooperation of the outer semi-circular block 405 with the outer semi-circular groove 404 on the inner ring module 403, and the cooperation of the inner semi-circular block 402 with the inner semi-circular groove 401 on the drag-reducing module body 1, a small relative rotation or translation between the layers is allowed. This "semi-circular groove and semi-circular block" interlocking design is similar to a "bearing" or "hinged" structure. It transforms the concentrated stress acting on a point into sliding friction and displacement between layers, thereby dispersing the stress to a larger contact area. It adapts to the shape of the soil through its own deformation, rather than rigidly resisting it, thus avoiding damage to the graphite material due to insufficient compressive strength.

[0031] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A graphite grounding resistance reduction module, comprising a resistance reduction module body (1), characterized in that: The inner cavity of the drag reduction module body (1) is provided with a metal frame (2), and the top and bottom of the metal frame (2) are fixedly connected with connection terminals (3). The outer side of the drag reduction module body (1) is provided with an anti-stress component (4). The stress-resistant component (4) includes an inner semi-circular groove (401), which is formed on the surface of the drag-reducing module body (1). An inner semi-circular block (402) is provided in the inner cavity of the inner semi-circular groove (401). An inner ring module (403) is fixedly connected to the side of the inner semi-circular block (402) away from the inner semi-circular groove (401). An outer semi-circular groove (404) is formed on the surface of the inner ring module (403). An outer semi-circular block (405) is provided in the inner cavity of the outer semi-circular groove (404). An outer ring module (406) is fixedly connected to the side of the outer semi-circular block (405) away from the outer semi-circular groove (404).

2. The graphite grounding resistance reduction module according to claim 1, characterized in that: The outer ring module (406) is fixedly connected to a protective shell (5), and the surface of the protective shell (5) is provided with permeation holes.

3. The graphite grounding resistance reduction module according to claim 1, characterized in that: The surface of the drag reduction module body (1) is fixedly connected to a first flexible connecting strip (6), and the side of the first flexible connecting strip (6) away from the drag reduction module body (1) is fixedly connected to the inner wall of the inner ring module (403).

4. The graphite grounding resistance reduction module according to claim 1, characterized in that: The inner ring module (403) is fixedly connected to a second flexible connecting strip (7), and the side of the second flexible connecting strip (7) away from the inner ring module (403) is fixedly connected to the inner wall of the outer ring module (406).

5. A graphite grounding resistance reduction module according to claim 1, characterized in that: The bottom of the outer ring module (406) is fixedly connected to a grounding ring (8), and the bottom of the grounding ring (8) is fixedly connected to a tapered rod.

6. The graphite grounding resistance reduction module of claim 1, wherein: An anti-detachment ring is fixedly connected to the surface of the connecting terminal (3), and the material of the anti-detachment ring is the same as that of the connecting terminal (3).

7. A graphite grounding resistance reduction module according to claim 1, characterized in that: The top of the main body (1) of the resistance reduction module is fixedly connected to a limiting plate (9), and the tops of the inner ring module (403) and the outer ring module (406) are in contact with the bottom of the limiting plate (9).

Images