Contact area-expanding twist-formed steel strip earth electrode enabling rotary press-fit construction and rotary press-fit type forming steel strip earthing construction method using same
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-12-04
- Publication Date
- 2026-08-13
Smart Images
Figure KR2025020657_13082026_PF_FP_ABST
Abstract
Description
Twisted formed steel strip grounding electrode with enlarged contact area capable of rotary press-fit construction and rotary press-fit formed steel strip grounding construction method using the same
[0001] The present invention relates to a twist-formed steel strip grounding electrode with an enlarged contact area capable of rotary press-fit construction and a rotary press-fit type formed steel strip grounding construction method using the same. More specifically, it relates to a twist-formed steel strip grounding electrode with an enlarged contact area capable of rotary press-fit construction that is connected to electrical equipment to protect humans and animals, prevent damage or disaster to electrical facilities or structures, discharge overcurrent, leakage current, or static electricity to the ground without corrosion, and a rotary press-fit type formed steel strip grounding construction method using the same.
[0002] Grounding is a process designed to protect humans and animals in electrical facilities, prevent damage or disasters to electrical facilities or structures, and safely discharge overcurrents, leakage currents, and static electricity into the ground. Depending on the purpose and characteristics of the facilities, grounding can be classified into various forms, including system grounding, which connects the power system to the ground, as well as lightning grounding, equipment grounding, and protective grounding.
[0003] To implement the grounding described above, a grounding electrode is typically installed in the ground and connected to electrical equipment. At this time, the grounding electrode is usually of the grounding rod type, which facilitates grounding construction, and is installed in the ground using the series or parallel method. The series method involves connecting the grounding electrodes in series and burying them deeply; this is typically done by driving the grounding rods into the ground using a deep driving method, and multiple grounding rods can be coupled and installed according to the required grounding resistance value. Additionally, the parallel method involves installing multiple grounding rods spaced apart from each other so that each makes contact with the ground. Conventionally, copper-clad steel grounding rods, which consist of steel rods coated with copper sheathing, were frequently used for ease of construction. However, due to disadvantages such as reduced conductivity caused by the oxidation of the copper in the grounding rods, damage to the copper sheathing during driving-type construction, and the difficulty of burying more than two rods in a row, there was a demand for improved forms of grounding electrodes and construction methods.
[0004] Accordingly, Korean Published Patent Application No. 10-2023-0090670 discloses a grounding rod for utility poles, a construction device, and a construction method to solve the limitations of existing grounding rods. Referring to FIG. 1, Korean Published Patent Application No. 10-2023-0090670 is configured to allow a grounding rod made of pure copper material to be buried deeper by driving a grounding rod (2) formed in a straight pipe shape and made of pure copper material through a grounding rod construction device (1) including an excavation part (1a) and a driving part (1b) so that a grounding rod made of pure copper material can be buried deeper without excavation.
[0005] As mentioned above, grounding rods installed using the deep driving method frequently suffered damage during the construction process, leading to poor resistance values due to corrosion caused by oxidation. Conventionally, various solutions were attempted to resolve this issue, such as simple excavation and burial. However, simply excavating and burying grounding rods resulted in poor adhesion of the contact surface and required significant external force to drive them deep, making it difficult to prevent damage. Furthermore, when multiple grounding rods were connected to achieve deep burial, it was difficult to utilize the impact method.
[0006] The present invention was devised to solve the problems of the prior art. The objective of the present invention is to provide a contact-area enlarged twist-formed steel strip grounding electrode and a rotary press-in type grounding construction method using the same, which enables construction that prevents corrosion of the grounding electrode, penetrates the soil using a rotary press-in method different from conventional grounding construction, maximizes the contact area of the grounding electrode, and strengthens the adhesion of the contact surface to improve grounding performance.
[0007] To achieve the above-mentioned purpose, the present invention relates to a twist-formed steel strip grounding electrode with an enlarged contact area capable of rotary press-fitting installation connected to a grounding wire of an electrical facility, comprising: a shaft portion extending in the longitudinal direction; and a wing portion formed on the outer surface of the shaft portion and extending spirally along the longitudinal direction; wherein at least one of the wing portions is disposed on the outer surface of the shaft portion, and the shaft portion and the wing portion can be formed integrally such that the contact area is enlarged compared to a simple rod-type grounding electrode.
[0008] In addition, the contact area enlargement twist-formed steel strip grounding electrode according to the present invention may have a steel strip having a cross-section of a predetermined shape twist-formed so that the shaft portion and wing portion may be formed to enable rotational press-fit installation.
[0009] In addition, the above-mentioned steel band may be configured to have a cross-section of any one of various shapes, such as a 'Y' shape, a '+' shape, and a '*' shape.
[0010] In addition, the contact area enlargement twist-formed steel strip grounding electrode according to the present invention further comprises an excavation blade formed at the other end of the shaft portion, wherein one end of the shaft portion is connected to a grounding wire, and the excavation blade may be formed such that the center of the other end of the shaft portion protrudes.
[0011] In addition, the above-described contact area enlarged twist-formed steel strip grounding electrode and the rotary press-in type formed steel strip grounding construction method using the same may include a rotary press-in construction step in which the contact area enlarged twist-formed steel strip grounding electrode is pressed in while rotating to excavate the ground and buried so as not to corrode the grounding electrode.
[0012] In addition, the rotary press-fit type formed steel strip grounding construction method according to the present invention may further include a grounding wire connection step, in which, after the rotary press-fit construction step, a grounding wire of an electrical facility is connected to one end of the buried contact area enlarged twist formed steel strip grounding electrode.
[0013] In addition, in the grounding wire connection step, the grounding wire of the electrical equipment can be connected in various ways, such as by compressing and connecting the grounding wire of the electrical equipment to one end of the contact area-enlarged twist-formed steel band grounding electrode through a sleeve comprising a first hole to which the grounding wire is connected and a second hole to which the contact area-enlarged twist-formed steel band grounding electrode is connected, or by directly connecting the grounding wire by splicing.
[0014] The twist-formed steel strip grounding electrode with an enlarged contact area according to the present invention and the rotary press-fit type formed steel strip grounding construction method using the same, based on the above-described configuration, have the advantage of ensuring construction quality and preventing safety accidents in advance by preventing corrosion caused by damage to the grounding electrode during impact-type construction and damage to the grounding electrode caused by a hammer. Furthermore, they have the advantage of not only minimizing damage to the grounding electrode during impact-type construction but also increasing the adhesion of the grounding contact surface and eliminating corrosion of the grounding electrode, thereby satisfying the grounding resistance performance required on-site and enhancing stability.
[0015] The contact area enlarged twist-formed steel strip grounding electrode according to the present invention with the above-described configuration and the rotary press-fit type formed steel strip grounding construction method using the same have the advantage of resolving existing limitations and increasing efficiency by making the work more convenient through the construction of a rotary press-fit type formed steel strip grounding electrode without grounding electrode corrosion, which is differentiated from conventional grounding construction.
[0016] The twist-formed steel strip grounding electrode with an enlarged contact area according to the present invention and the rotary press-fit type formed steel strip grounding construction method using the same, based on the above-described configuration, not only maximize the contact area with the soil but also increase the adhesion of the grounding contact surface and prevent corrosion of the grounding electrode, resulting in excellent grounding performance and semi-permanent maintenance of the grounding facility. In addition, it has the advantage of enabling convenient construction according to site conditions by pre-configuring steel strip grounding electrodes of various lengths to allow for rotary press-fit construction.
[0017] FIG. 1 is a drawing illustrating a grounding rod and its installation device according to the prior art.
[0018] FIG. 2 is a drawing illustrating an electrical facility equipped with a contact area enlargement twist-formed steel strip grounding electrode according to the present invention.
[0019] FIG. 3 is a perspective view of a twist-formed steel strip grounding electrode with an enlarged contact area according to the present invention.
[0020] FIG. 4 is a cross-sectional view of a twist-formed steel strip grounding electrode with an enlarged contact area according to the present invention.
[0021] FIG. 5 is an exploded perspective view of a contact area enlarged twist-formed steel strip grounding electrode and a grounding wire according to the present invention.
[0022] FIG. 6 is a perspective view illustrating the installation of a grounding electrode with a twisted steel strip of various lengths to increase the contact area on a grounding wire.
[0023] FIGS. 7 and 8 are drawings illustrating cross-sections of steel strips of various shapes of a twist-formed steel strip grounding electrode with an enlarged contact area according to the present invention.
[0024] FIG. 9 is a diagram illustrating the twist forming process of a steel strip grounding electrode with an enlarged contact area twist forming process according to the present invention.
[0025] FIG. 10 is a front view illustrating a twist-formed steel strip grounding electrode with an enlarged contact area according to the present invention.
[0026] FIG. 11 is a front view illustrating an excavator blade machined on a twist-formed steel strip grounding electrode with an enlarged contact area according to the present invention.
[0027] FIG. 12 is a block diagram illustrating a rotary press-fit formed steel strip grounding construction method according to the present invention.
[0028] FIGS. 13 to 15 are schematic drawings illustrating a rotary press-fit type formed steel strip grounding construction method according to the present invention.
[0029] *Detailed explanation of the main symbols in the drawing*
[0030] 10: Increased contact area twist-formed steel strip grounding electrode
[0031] 11 : Kangdae
[0032] 12 : Strength
[0033] 20 : Electrical Equipment
[0034] 21 : Ground wire
[0035] 22 : Conduit
[0036] 30 : Sleeve
[0037] 31 : Sleeve body
[0038] 32 : First insertion hole
[0039] 33 : Second insertion hole
[0040] 40 : Actuator
[0041] 50 : Rotary press tool
[0042] 100 : shaft
[0043] 200 : Wing part
[0044] 300 : Excavator blade
[0045] With reference to the attached drawings, the contact area enlargement twist-formed steel strip grounding electrode according to the present invention and the construction method of a rotary press-fit type formed steel strip grounding electrode using the same will be described in detail below. The drawings presented below are provided as examples to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. Furthermore, throughout the specification, the same reference numerals indicate the same components.
[0046] Unless otherwise defined, technical and scientific terms used herein have the meanings commonly understood by those skilled in the art to which this invention pertains, and descriptions of known functions and configurations that could unnecessarily obscure the essence of the invention are omitted in the following description and accompanying drawings.
[0047] Furthermore, the terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.
[0048] FIGS. 2 to 6 relate to a contact area-enlarged twist-formed steel strip grounding electrode according to the present invention, FIG. 2 is a drawing showing an electrical facility with a contact area-enlarged twist-formed steel strip grounding electrode installed, FIG. 3 is a perspective view of a contact area-enlarged twist-formed steel strip grounding electrode, FIG. 4 is a plan cross-sectional view of a contact area-enlarged twist-formed steel strip grounding electrode, FIG. 5 is an exploded perspective view of a contact area-enlarged twist-formed steel strip grounding electrode and a grounding wire, and FIG. 6 is a perspective view showing contact area-enlarged twist-formed steel strip grounding electrodes of various lengths installed on a grounding wire.
[0049] Referring to FIGS. 2 and 3, the contact area enlargement twisted formed steel strip grounding electrode (10) according to the present invention can be installed on the ground and connected to an electric wire (21) of an electrical facility (20). At this time, the electrical facility (20) may refer to various facilities or devices such as a power distribution line, a power transmission line, or a lightning rod, and the electric wire (21) may be an extended lead wire that safely discharges leakage current or static electricity from the electrical facility (20) to the ground.
[0050] The contact area enlargement twist-formed steel strip grounding electrode (10) according to the present invention may include an axial portion (100) extended in the longitudinal direction and a wing portion (200) formed on the outer surface of the axial portion (100) and extending spirally along the longitudinal direction. In this case, the contact area enlargement twist-formed steel strip grounding electrode (10) according to the present invention may have the axial portion (100) and the wing portion (200) formed by twist-forming a steel strip having a cross-section of a predetermined shape.
[0051] Referring to FIG. 4, the cross-sectional surface of the shaft portion (100) may be circular or polygonal in shape, and a plurality of wing portions (200) may be spaced apart from each other along the outer surface of the shaft portion (100). At this time, the plurality of wing portions (200) may be spaced apart so as to extend in the direction in which a pair of wing portions (200) are oriented relative to the center of the shaft portion (100).
[0052] Referring to FIG. 5, the contact area enlargement twisted formed steel bar grounding electrode (10) according to the present invention may be connected directly to the grounding wire (21) or connected through a sleeve (30). Here, the sleeve (30) may be implemented in a form in which the contact area enlargement twisted formed steel bar grounding electrode (10) and the grounding wire (21) are arranged in a single hole, or may be implemented in a form in which a first insertion hole (32) and a second insertion hole (33) are formed in which the contact area enlargement twisted formed steel bar grounding electrode (10) and the grounding wire (21) are respectively arranged in the sleeve body (31). At this time, the sleeve body (31) may be composed of a conductive material such as copper. And the grounding wire (21) can be inserted into the grounding pipe (22) and connected to the sleeve (30), and the grounding wire (21) inserted into the sleeve (30) can be fixed by compression, and the grounding wire can be connected in various ways, such as by joining, depending on the site conditions.
[0053] The contact area enlargement twist formed steel strip grounding electrode (10) according to the present invention may further include an excavation blade (300) formed at the other end of the shaft portion (100), wherein one end of the shaft portion (100) is connected to a grounding wire (21). In this case, the excavation blade (300) may be formed such that the center of the other end of the shaft portion (100) protrudes.
[0054] Referring to FIG. 6, the contact area enlargement twisted formed steel bar grounding electrode (10) according to the present invention can be manufactured in advance in various lengths and utilized during on-site construction. For example, the contact area enlargement twisted formed steel bar grounding electrode (10) of different lengths, formed with a first length (L1) and a second length (L2), can be selected and utilized according to the grounding resistance value required at the site.
[0055] FIGS. 7 to 11 relate to a contact area enlarged twist-formed steel strip grounding electrode according to the present invention, FIGS. 7 and 8 show a steel strip before forming of the contact area enlarged twist-formed steel strip grounding electrode, FIG. 9 shows a twist-forming process to enable rotational press-fitting of the contact area enlarged twist-formed steel strip grounding electrode, FIG. 10 shows a front view showing the contact area enlarged twist-formed steel strip grounding electrode twist-formed to enable rotational press-fitting, and FIG. 11 shows a front view of the contact area enlarged twist-formed steel strip grounding electrode with an excavator blade machined thereon.
[0056] Referring to FIG. 7, the contact area enlargement twist formed steel bar grounding electrode (10) can be formed by processing a steel bar (11) extended along the longitudinal direction. At this time, the steel bar (11) can be implemented in a predetermined shape as shown in FIG. 7 (a) and (b), and as an example, the cross-sectional area can be formed in a 'cross' shape.
[0057] Referring to FIG. 8, the steel band (11) may have a cross-section of various shapes. FIG. 8 (a) illustrates that the cross-section of the steel band (11) is formed in a 'cross' shape and includes four wing sections (200). FIG. 8 (b) illustrates that the cross-section of the steel band (11) is formed in a 'Y' shape and includes three wing sections (200). Additionally, FIG. 8 (c) illustrates that the cross-section of the steel band (11) is formed in a '*' shape and includes six wing sections (200). In addition, the cross-section of the steel band (11) may be implemented in various shapes. Furthermore, as shown in FIG. 8 (d), it may be implemented in a form in which a longitudinally extended reinforcing member (12) is combined with the center of the steel band (11), and the center of the steel band (11) and the reinforcing member (12) may be formed as the shaft section (100).
[0058] Referring to FIG. 9, the steel bar (11) can be twisted in various ways to enable rotational press-fit construction and processed into the contact area enlarged twisted formed steel bar grounding electrode (10). FIG. 9 (a) illustrates that one end of the steel bar (11) is fixed and the other end of the steel bar (11) is connected to an actuator (40) to rotate it, thereby twisting the steel bar (11). FIG. 9 (b) illustrates that the steel bar (11) is twisted and processed by being drawn out by the actuator (40). In addition to this, the steel bar (11) can be processed through various forms of twist forming.
[0059] Referring to FIGS. 10 and 11, the steel bar (11) can be twist-formed to enable rotational press-fit construction and processed into the contact area enlargement twist-formed steel bar grounding electrode (10). At this time, an excavation blade (300) can be processed at the end of the contact area enlargement twist-formed steel bar grounding electrode (10). Here, the excavation blade (300) can be processed so that the center of the other end of the shaft portion (100) protrudes. At this time, the excavation blade (300) can form a predetermined angle (θ) based on the plane of the cross-sectional plane, and for example, the predetermined angle (θ) can be formed in various ways as needed.
[0060] FIGS. 12 to 15 relate to a rotary press-in type rotary steel strip grounding construction method using a twisted formed steel strip grounding electrode with an enlarged contact area according to the present invention, FIG. 12 shows a block diagram illustrating the rotary press-in type formed steel strip grounding construction method, and FIGS. 13 to 15 show diagrams illustrating the rotary press-in type formed steel strip grounding construction method.
[0061] Referring to FIG. 12, the rotary press-fit formed steel strip grounding construction method (S10) according to the present invention may include a work preparation step (S100), an excavation step (S150), a rotary press-fit construction step (S200), a grounding wire connection step (S300), and a finishing step (S400).
[0062] The above work preparation step (S100) may be a step of selecting the installation location of the contact area enlargement twist-formed steel bar grounding electrode (10) through site identification, selecting a contact area enlargement twist-formed steel bar grounding electrode (10) with a suitable length, and preparing related rotary press-fit tools, etc.
[0063] Referring to FIG. 13, in the rotary press-in construction step (S200) following the excavation step (S150), the contact area enlarged twist-formed steel strip grounding electrode (10) can be fixed to a rotary press-in tool (50) or installed by rotary press-in at a location pre-selected by the worker. At this time, the rotary press-in tool (50) can be configured in various forms depending on the construction site, and when installing the contact area enlarged twist-formed steel strip grounding electrode (10) on a power distribution line, an electric motor or an impact drill can be utilized. As described above, the rotary press-in tool (50) can vary depending on the site and can be defined as a device or equipment that transmits rotational force.
[0064] The above-described rotary press-fit construction may be a type of construction in which rotational force is applied to the shaft portion (100) of the contact area-enlarging twist-formed steel bar grounding electrode (10), and the contact area-enlarging twist-formed steel bar grounding electrode (10) rotates and press-fits around the center of the shaft portion (100). At this time, the excavating blade (300) of the contact area-enlarging twist-formed steel bar grounding electrode (10) digs into the soil of the ground, and the wing portion (200) excavates the soil as a whole, so that the contact area-enlarging twist-formed steel bar grounding electrode (10) can be rotary press-fitted and buried in the ground.
[0065] Conventionally, construction is performed by excavating concrete or asphalt using a drill bit and then embedding the grounding electrode by impact; however, this method has the high possibility of damage and corrosion to the grounding electrode and the problem of poor contact between the grounding electrode and the earth. Accordingly, the rotary press-in type formed steel strip grounding construction method (S10) according to the present invention allows for construction by rotary press-in of the contact area-enlarged twist formed steel strip grounding electrode (10) to the required depth, and has the significant advantages of not requiring additional connection assembly or impact, as well as high contact surface adhesion and no corrosion. In particular, the contact area-enlarged twist formed steel strip grounding electrode (10) according to the present invention is distinguished by the fact that the entire formed steel strip at both ends in the longitudinal direction can be configured in a spiral shape.
[0066] Referring to FIGS. 14 and 15, the grounding wire connection step (S300) may be a step of connecting a grounding wire (21) connected to the electrical equipment (20) to one end of the contact area-enlarged twist-formed steel bar grounding electrode (10). At this time, the grounding wire (21) may be directly joined to the contact area-enlarged twist-formed steel bar grounding electrode (10) or compressed and connected so as to be interconnected through the sleeve (30).
[0067] In addition, depending on site conditions, the grounding wire can be connected in various ways, such as by joining.
[0068] The above rotary press-fit construction step (S200) and the above ground wire connection step (S300) may be repeated depending on site conditions, thereby allowing a plurality of the above contact area enlarged twist-formed steel bar grounding electrodes (10) to be installed in a parallel manner. Subsequently, through the above finishing step (S400), construction may proceed by filling in the soil so that the above contact area enlarged twist-formed steel bar grounding electrodes (10) and ground wires (21) are not exposed outside the soil, and by performing site cleanup and finishing.
[0069] As described above, the present invention has been explained with specific details such as specific components and limited exemplary drawings; however, this is provided merely to aid in a more comprehensive understanding of the invention, and the invention is not limited to the embodiments described above. Those skilled in the art can make various modifications and variations from this description.
[0070] Accordingly, the scope of the present invention should not be limited to the described embodiments, and all things equivalent to or having equivalent variations to the claims set forth below, as well as the claims set forth below, shall be considered to fall within the scope of the concept of the present invention.
Claims
1. In a twist-formed steel strip grounding electrode with an enlarged contact area connected to a grounding wire of an electrical installation, A axial portion extended in the longitudinal direction; and A wing portion formed on the outer surface of the shaft portion and twisted along the longitudinal direction to extend spirally; Includes, At least one of the above-mentioned wing portions is disposed on the outer surface of the shaft portion, wherein A contact area enlarged twist-formed steel strip grounding electrode characterized by the shaft portion and wing portion being integrally formed.
2. In Paragraph 1, A contact area enlargement twist-formed steel strip grounding electrode characterized by a steel strip having a cross-section of a predetermined shape being twist-formed to enable rotational press-fit construction, thereby forming the shaft portion and wing portion.
3. In Paragraph 2, The above wing portion is composed of multiple parts, A contact area enlargement twist-formed steel strip grounding electrode characterized by being spaced apart from each other along the circumferential direction of the above-mentioned shaft.
4. In Paragraph 2, One end of the above shaft is connected to a ground wire, Excavation blade formed at the other end of the shaft portion; Includes more, The above excavator blade is, A contact area enlarged twist-formed steel strip grounding electrode characterized by having the center of the other end of the shaft portion formed to protrude.
5. In a rotary press-fit type formed steel strip grounding construction method using a twist-formed steel strip grounding electrode with an enlarged contact area according to any one of paragraphs 1 to 4, An excavation step for excavating the location and surroundings where the above-mentioned contact area enlarged twist-formed steel strip grounding electrode is to be buried; A rotary press-in construction step in which the above-mentioned contact area enlarged twist-formed steel strip grounding electrode is pressed and rotated by a rotary press-in tool while excavating the ground and burying it; A grounding wire connection step for connecting a grounding wire of an electrical facility to one end of the buried contact area enlarged twist-formed steel strip grounding electrode; A rotary press-fit formed steel strip grounding construction method characterized by including