Long-acting stable low-resistance nonmetal grounding electrode

Abstract

The invention discloses a long-acting stable low-resistance nonmetal grounding electrode, and relates to the technical field of nonmetal grounding electrodes, the long-acting stable low-resistance nonmetal grounding electrode comprises a grounding leading-out terminal, the two ends of the grounding leading-out terminal are fixedly connected with a grounding connector and a conductive core body respectively, and the conductive core body is sleeved with a sheath assembly. According to the long-acting stable low-resistance non-metal grounding electrode, the ultra-long service life is achieved through a multi-layer active protection system, the conductive core body is made of a non-corrosive graphite material, metal electrochemical corrosion is fundamentally avoided, and a main anti-corrosion layer is formed by adding graphene conductive plastic and external anti-corrosion paint to the sheath shell; a selective permeable membrane arranged outside the ion slow release bin blocks reverse osmosis of an external corrosive medium, gas-liquid double sealing of a grounding connection point is achieved through a double-wall Teflon heat shrinkable sleeve, and due to quadruple protection, the service life of the grounding electrode in saline-alkali acid soil is remarkably prolonged, and meanwhile the annual resistance fluctuation rate of the grounding electrode can be stabilized.

Description

Technical Field

[0001] The present invention relates to the technical field of non-metallic grounding electrodes, and in particular to a long-lasting, stable and low-resistance non-metallic grounding electrode. Background Art

[0002] The long-lasting, stable and low-resistance non-metallic grounding electrode is a kind of electrode that uses a highly conductive non-metallic material as the core conductor. Compared with the precious metal materials for electrical contact, it has the characteristics of corrosion resistance, aging resistance, and maintenance-free. During long-term use, it can keep the grounding resistance value stable below the design threshold. It is suitable for harsh environments such as high salinity, strong acid and alkali, and drought, and avoids the performance degradation of traditional metal grounding electrodes caused by electrochemical corrosion.

[0003] The long-lasting, stable, and low-resistance non-metallic grounding electrodes in the prior art are buried underground during actual use and are subjected to soil compression for a long time. Moreover, due to the shallow burial depth, there is a certain positional displacement after long-term use. When the soil environment is relatively harsh, the surface of the grounding electrode is easily scratched by hard stones in the soil when it is compressed by the soil and the underground position is relatively displaced, resulting in scratches and other problems, which in turn causes the graphite material to oxidize and peel off in an electrolytic environment, resulting in a decrease in conductivity, and leading to problems such as increased grounding resistance.

[0004] Therefore, in order to solve the above problems, a long-term stable low-resistance non-metallic grounding electrode is proposed. Summary of the Invention

[0005] In order to make up for the shortcomings of the existing technology, the non-metallic grounding electrode is buried underground and is compressed by the soil for a long time. Due to the shallow burial depth, there is a certain position deviation after long-term use. When the soil environment is relatively harsh, when it is compressed by the soil and the underground position is relatively offset, the surface of the grounding electrode is easily scratched by the hard stones in the soil, resulting in scratches and other problems, which in turn causes the graphite material to oxidize and peel off in the electrolytic environment, the conductivity decreases, and the grounding resistance increases. A long-lasting, stable and low-resistance non-metallic grounding electrode is proposed.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a long-lasting, stable and low-resistance non-metallic grounding electrode, including a grounding lead-out terminal, the two ends of the grounding lead-out terminal are respectively fixedly connected to a grounding connector and a conductive core, the outer shell of the conductive core is provided with a sheath assembly, and a maintenance assembly is installed at the end of the sheath assembly away from the grounding lead-out terminal. The conductive core is made of graphite material, and the sheath assembly includes an outer shell, a placement bin is provided inside the outer shell, the outer wall of the conductive core is tightly attached to the inner wall of the placement bin, and the outer shell is a composite conductive plastic with graphene conductive filler added.

[0007] Preferably, the conductive core and the shell are both triangular polyhedrons.

[0008] Preferably, an ion slow-release chamber is provided at the edge of the shell, and the interior of the ion slow-release chamber is filled with an ion slow-release material.

[0009] Preferably, an osmotic chamber is provided at the edge of the shell, a selective permeable membrane is provided inside the osmotic chamber, and the osmotic chamber is located outside the ion sustained-release chamber.

[0010] Preferably, the outside of the housing and the outside of the grounding lead terminal are both coated with anti-corrosion paint.

[0011] Preferably, the outer wall of the shell is provided with a plurality of micropores penetrating the shell, and the micropores penetrate the placement chamber, the ion slow-release chamber and the permeation chamber.

[0012] Preferably, the outer movable sleeve of the ground connector is provided with a heat shrink sleeve, and the heat shrink sleeve is made of double-wall Teflon material.

[0013] Preferably, the maintenance assembly includes a threaded column fixedly connected to the side of the shell away from the grounding lead-out terminal, the outer wall of the threaded column is sleeved with an end cover, and the inner wall of the end cover is plugged into the outer wall of the end of the shell away from the grounding lead-out terminal.

[0014] Preferably, the outer wall of the threaded column is threadedly connected to a threaded sleeve, and one end of the threaded sleeve close to the shell abuts against a side of the end cover away from the shell.

[0015] Preferably, a plurality of sealing rings are fixedly connected to the inner wall of the end cover, and the sealing rings are made of corrosion-resistant material.

[0016] Due to the adoption of the above technical solution, the present invention has the following technical advancements compared to the prior art:

[0017] 1. The present invention provides a long-lasting, stable, and low-resistance non-metallic grounding electrode, which achieves an ultra-long service life through a multi-layer active protection system. The conductive core is made of non-corrosive graphite material to fundamentally avoid metal electrochemical corrosion. The sheath shell is made of conductive plastic with graphene added and an external anti-corrosion coating to form the main anti-corrosion layer; the selective permeability membrane outside the ion release chamber blocks the reverse penetration of external corrosive media, and the grounding connection point is sealed by a double-walled Teflon heat shrink sleeve to achieve gas-liquid dual sealing. The four-layer protection significantly increases the service life of the grounding electrode in saline, alkaline, and acidic soils and can also stabilize the annual resistance fluctuation rate of the grounding electrode.

[0018] 2. The present invention provides a long-lasting, stable, and low-resistance non-metallic grounding electrode. Based on the coordinated design of a microporous channel network and an ion slow-release material, the active optimization of soil resistivity is achieved. The micropores penetrate the outer shell to connect the ion slow-release chamber and the soil, forming a three-dimensional channel for ion diffusion, which continuously releases conductive ions to improve the conductivity of the surrounding soil. The selective permeability membrane in the permeation chamber accurately controls the ion release rate and blocks the invasion of external pollutants, so that the grounding electrode can still maintain a low resistance in arid or high-resistivity soils. In addition, no artificial resistance-reducing agent maintenance is required during the rainy season, thereby reducing operation and maintenance costs.

[0019] 3. The present invention provides a long-lasting, stable, and low-resistance non-metallic grounding electrode. The detachable sealing system composed of the end cover and the threaded sleeve breaks through the maintenance bottleneck of the traditional grounding electrode. The sealing ring deforms under the axial pressure of the threaded sleeve to fill the gap and realize dynamic sealing. During maintenance, the threaded sleeve can be unscrewed to open the cover non-destructively, and the ion slow-release material can be easily replaced. Combined with the anti-soil extrusion properties of the triangular prism shell, the opening and closing structure is ensured to be intact within the annual use cycle, solving the problem of performance degradation caused by material depletion, thereby extending the service life of the grounding electrode and reducing its operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is an exploded schematic diagram of the overall structure of the present invention;

[0022] Figure 3 Schematic diagram of the cross-sectional structure of the casing of the present invention;

[0023] Figure 4 It is a schematic diagram of the end cover structure of the present invention.

[0024] In the figure: 1. Grounding lead-out terminal; 2. Conductive core; 3. Grounding connector; 4. Sheath assembly; 41. Housing; 42. Placement chamber; 43. Ion release chamber; 44. Permeation chamber; 45. Ion release material; 46. Selective permeability membrane; 47. Anti-corrosion coating; 48. Micropore; 49. Heat shrink sleeve; 5. Maintenance assembly; 51. Threaded column; 52. End cover; 53. Threaded sleeve; 54. Sealing ring. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] Specific examples are given below.

[0027] See also Figure 1 - Figure 4 The present invention provides a technical solution: a long-lasting, stable and low-resistance non-metallic grounding electrode, comprising a grounding lead-out terminal 1, wherein the two ends of the grounding lead-out terminal 1 are respectively fixedly connected to a grounding connector 3 and a conductive core 2, the outer shell of the conductive core 2 is provided with a sheath assembly 4, and a maintenance assembly 5 is installed at one end of the sheath assembly 4 away from the grounding lead-out terminal 1, the conductive core 2 is made of graphite material, the sheath assembly 4 comprises an outer shell 41, a placement bin 42 is provided inside the outer shell 41, the outer wall of the conductive core 2 is tightly attached to the inner wall of the placement bin 42, the outer shell 41 is a composite conductive plastic with graphene conductive filler added, the conductive core 2 is tightly embedded in the placement bin 42 of the sheath shell 41, significantly enhancing the ability to resist soil extrusion deformation, thereby improving the structural strength of the grounding electrode, and avoiding problems such as wear and scratching of the conductive core 2 caused by external soil factors, and at the same time, the conductive plastic with graphene filler added to the outer shell 41 can synergistically conduct electricity, thereby achieving the effect of reducing resistance.

[0028] like Figure 2 As shown, the conductive core 2 and the outer shell 41 are both triangular polyhedrons. The conductive core 2 is tightly embedded in the placement compartment 42 of the sheath outer shell 41. The two together constitute a triangular polyhedron structure, thereby greatly increasing the external surface area of the conductive core 2 and thereby improving the dispersion efficiency of the grounding electrode.

[0029] like Figure 2 and Figure 3 As shown, an ion release chamber 43 is opened at the edge of the shell 41, and the interior of the ion release chamber 43 is filled with ion release material 45. The ion release material 45 filled in the ion release chamber 43 at the edge continuously releases conductive ions to the surrounding soil through the micropores 48 penetrating the shell 41, effectively reducing the grounding resistance.

[0030] like Figure 2 and Figure 3 As shown, an infiltration chamber 44 is provided at the edge of the outer shell 41, and a selective permeation membrane 46 is provided inside the infiltration chamber 44. The infiltration chamber 44 is located outside the ion slow-release chamber 43. The selective permeation membrane 46 provided in the infiltration chamber 44 on the outer layer of the ion slow-release chamber 43 allows the conductive ions of the ion slow-release material 45 to seep out in a controlled manner, and more importantly, blocks the corrosive factors in the soil from reversely permeating into the ion slow-release chamber 43, thereby protecting the activity of the slow-release material and extending its service life.

[0031] like Figure 2 As shown, the outside of the shell 41 and the outside of the grounding lead terminal 1 are coated with anti-corrosion coating 47. The anti-corrosion coating 47 coated on the outside of the shell 41 and the grounding lead terminal 1 constitutes the main anti-corrosion layer, ensuring the long-term corrosion resistance of the overall structure in harsh soil environments.

[0032] like Figure 3 As shown, the outer wall of the shell 41 is provided with a number of micropores 48 that penetrate the shell 41. The micropores 48 penetrate the placement chamber 42, the ion release chamber 43 and the penetration chamber 44. The micropores 48 serve as a three-dimensional channel network that penetrates the placement chamber 42, the ion release chamber 43 and the penetration chamber 44 of the shell 41 to construct an efficient and controllable ion exchange path. The physical pore size limits the ion flow rate, and together realizes the "one-way intelligent release" of the ion release material 45, which not only avoids the material from failing due to external contamination, but also prevents the instantaneous excessive loss of ions, ensuring that the grounding system maintains low resistance and long life in harsh environments.

[0033] like Figure 2 As shown, the outer movable sleeve of the ground connector 3 is provided with a heat shrink sleeve 49. The heat shrink sleeve 49 is made of double-wall Teflon material. The heat shrink sleeve 49 is tightly wrapped around the outside of the ground connector 3 and serves as a key protective layer for the only exposed connection point between the ground electrode and the external wire. After heating and shrinking, it forms a seamless bond with the ground connector 3 and the wire interface, achieving a completely airtight and liquid-tight seal, completely blocking the intrusion path of moisture, oxygen and corrosive media in the soil, and fundamentally suppressing the occurrence of electrochemical corrosion.

[0034] like Figure 2 As shown, the maintenance component 5 includes a threaded column 51 fixedly connected to the side of the shell 41 away from the grounding lead-out terminal 1, and the outer wall of the threaded column 51 is sleeved with an end cover 52. The inner wall of the end cover 52 is plugged into the outer wall of the shell 41 at the end away from the grounding lead-out terminal 1. The inner wall of the end cover 52 is tightly fitted with the outer wall of the tail end of the shell 41 to form a physical sealing barrier, blocking soil moisture and corrosive media from axially invading the placement chamber 42 or the ion release chamber 43. At the same time, the non-through closed design of the end cover 52 completely isolates the tail end from being directly exposed to the soil environment, preventing this weak point from causing failure of the overall anti-corrosion system.

[0035] like Figure 2 As shown, the outer wall of the threaded column 51 is threadedly connected to a threaded sleeve 53, and the end of the threaded sleeve 53 close to the outer shell 41 is abutted against the side of the end cover 52 away from the outer shell 41. When maintenance is required, the threaded sleeve 53 can be unscrewed to open the end cover 52, and the ion slow-release material 45 can be easily replenished or replaced to ensure the long-term stability of the grounding resistance.

[0036] like Figure 4 As shown, the inner wall of the end cover 52 is fixedly connected with a plurality of sealing rings 54, which are made of corrosion-resistant material. The sealing rings 54 improve the sealing effect of the ion release chamber 43 and the permeation chamber 44. At the same time, their elastic deformation fills the microscopic gaps to form an adaptive dynamic seal, which effectively compensates for the deformation and displacement caused by temperature changes or soil extrusion.

[0037] The working principle of the present invention is as follows: when in use, the grounding connector 3 is sealed and connected to the external wire through the heat shrink sleeve 49, and the current is efficiently transmitted to the core graphite conductive core 2 through the grounding lead terminal 1. The conductive core 2 is tightly embedded in the placement chamber 42 of the sheath shell 41. The two together form a triangular polyhedron structure, which significantly enhances the ability to resist soil extrusion deformation and dispersion efficiency. The conductive plastic with graphene filler added to the shell 41 not only conducts electricity synergistically, but also the ion release material 45 filled in the ion release chamber 43 at its edge continuously releases conductive ions to the surrounding soil through the micropores 48 penetrating the shell 41, effectively reducing the grounding resistance. The selective permeation membrane 46 arranged in the permeation chamber 44 allows the conductive ions of the ion slow-release material 45 to penetrate in a controlled manner, and more importantly, blocks the corrosive factors in the soil from reversely penetrating into the ion slow-release chamber 43, thereby protecting the activity of the slow-release material and extending its service life. The anti-corrosion coating 47 coated on the outside of the shell 41 and the grounding lead terminal 1 constitutes the main anti-corrosion layer, which, combined with the corrosion-resistant sealing ring 54 on the inside of the end cover 52, ensures the long-term sealing and corrosion resistance of the overall structure in harsh soil environments. When maintenance is required, the end cover 52 can be opened by unscrewing the threaded sleeve 53, and the ion slow-release material 45 can be easily replenished or replaced to ensure the long-term stability of the grounding resistance.

[0038] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A long-lasting, stable, low-resistance non-metallic grounding electrode, comprising a grounding lead-out terminal (1), characterized in that: The two ends of the grounding lead-out terminal (1) are respectively fixedly connected to a grounding connector (3) and a conductive core (2); the outer shell of the conductive core (2) is provided with a sheath assembly (4); the end of the sheath assembly (4) away from the grounding lead-out terminal (1) is provided with a maintenance assembly (5); the conductive core (2) is made of graphite material; the sheath assembly (4) includes a shell (41); a placement chamber (42) is provided inside the shell (41); the outer wall of the conductive core (2) is tightly attached to the inner wall of the placement chamber (42); the shell (41) is a composite conductive plastic with graphene conductive filler added.

2. The long-lasting, stable, low-resistance non-metallic grounding electrode according to claim 1, characterized in that: The conductive core (2) and the outer shell (41) are both triangular polyhedrons.

3. The long-lasting, stable, low-resistance non-metallic grounding electrode according to claim 1, characterized in that: An ion slow-release chamber (43) is provided at the edge of the housing (41), and the interior of the ion slow-release chamber (43) is filled with an ion slow-release material (45).

4. The long-lasting, stable, low-resistance non-metallic grounding electrode according to claim 3, characterized in that: An osmotic chamber (44) is provided at the edge of the housing (41), a selective permeation membrane (46) is provided inside the osmotic chamber (44), and the osmotic chamber (44) is located outside the ion slow-release chamber (43).

5. The long-lasting, stable, low-resistance non-metallic grounding electrode according to claim 1, characterized in that: The exterior of the housing (41) and the exterior of the grounding lead terminal (1) are both coated with an anti-corrosion coating (47).

6. The long-lasting, stable, low-resistance non-metallic grounding electrode according to claim 4, characterized in that: The outer wall of the shell (41) is provided with a plurality of micropores (48) penetrating the shell (41), and the micropores (48) penetrate the placement chamber (42), the ion slow-release chamber (43) and the permeation chamber (44).

7. The long-lasting, stable, low-resistance non-metallic grounding electrode according to claim 1, characterized in that: The outer movable sleeve of the grounding connector (3) is provided with a heat shrink sleeve (49), and the heat shrink sleeve (49) is made of double-wall Teflon material.

8. The long-lasting, stable, low-resistance non-metallic grounding electrode according to claim 1, characterized in that: The maintenance assembly (5) comprises a threaded column (51) fixedly connected to a side of the housing (41) away from the grounding lead-out terminal (1); an outer wall of the threaded column (51) is sleeved with an end cover (52); an inner wall of the end cover (52) is plugged into an outer wall of the housing (41) at one end away from the grounding lead-out terminal (1).

9. The long-lasting, stable, low-resistance non-metallic grounding electrode according to claim 8, characterized in that: The outer wall of the threaded column (51) is threadedly connected to a threaded sleeve (53), and one end of the threaded sleeve (53) close to the outer shell (41) abuts against a side of the end cover (52) away from the outer shell (41).

10. The long-lasting, stable, low-resistance non-metallic grounding electrode according to claim 8, characterized in that: A plurality of sealing rings (54) are fixedly connected to the inner wall of the end cover (52), and the sealing rings (54) are made of corrosion-resistant material.

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