Ground Clearance Upturn Method using Electric Pole Ground Clearance Upward Device with Steel Bands and Hexagonal Fastening Bolts

Abstract

The method of raising the ground height using the pole ground height raising device (1) of the present invention is characterized by the pole assembly (10) having a length (L) of the raising device wrapping around the end of the pole of a low-voltage pole (100) that needs to have its ground height (H) raised, being fixed by the first and second bands (20a, 20b), and the low-voltage power line (200) being wired by the first, second, third, and fourth racks (40a, 40b, 40c, 40d) which are connected to the fastening bolts (30) located in each of the first, second, third, and fourth fastening holes (13a, 13b, 13c, 13d), thereby enabling the reduction of investment costs by using a dual construction method of pole replacement and pole non-replacement using the ground height raising device, depending on the site conditions, at locations where there is a concern about insufficient ground height of the low-voltage power line at the installation site of the low-voltage pole.

Description

Technology Field

[0001] The present invention relates to a utility pole for low-voltage power lines, and more specifically, to a method for increasing the ground clearance using a pole ground clearance increasing device that can resolve insufficient ground clearance of low-voltage power lines without replacing the pole, depending on the site conditions. Background Technology

[0002] Generally, low-voltage utility poles installed on the ground have an appropriate ground clearance of about 10m.

[0003] Recently, due to the increase in communication facilities, communication lines are installed in a significant portion of low-voltage pole installation areas, and there is a need to replace 10m poles with 12m poles of higher specifications regardless of their condition in order to obtain an appropriate ground clearance, due to reasons such as the addition of three-phase low-voltage wires, the installation of new low-voltage cables dedicated to distributed power common transformers, and the addition of joints.

[0004] As a result, in densely populated rural residential areas, converting single-phase low-voltage power lines to three-phase requires increasing the span length and thus increasing the sag of the wires. Furthermore, due to the high density of housing, complaints regarding the replacement of utility poles occur, leading to reduced constructability and the need to raise the height by approximately 2 meters at numerous locations.

[0005] Furthermore, in densely populated rural residential areas, when installing two-stage dedicated distributed power cables below low-voltage power lines to exclusively supply private Power Purchase Agreements (PPAs) to homes, the ground clearance is insufficient, resulting in numerous locations requiring an elevation of approximately 2 meters, along with an increase in construction costs per kW (i.e., investment costs) during new designs. In this case, the aforementioned private PPA involves installing a significant amount of solar power generation on building rooftops or roofs—that is, on idle spaces—to sell all surplus electricity remaining after use to KEPCO.

[0006] Therefore, when supplying new utility poles, the increasing number of locations with insufficient ground clearance for low-voltage and service lines installed in alleyways of the old city inevitably leads to increased replacement costs for long utility poles. Prior art literature

[0007] Korean Utility Model Registration KR 20-0219450 (2001.01.29) The problem to be solved

[0008] Accordingly, the present invention, taking into account the above-mentioned points, aims to provide a method for raising the ground height of a utility pole using a ground height raising device, which enables investment cost reduction by diversifying the construction method according to site conditions to include not only pole replacement but also pole-free replacement using a ground height raising device, in locations where there is a concern about insufficient ground height of low-voltage power lines at low-voltage pole installation sites. means of solving the problem

[0009] The pole ground clearance raising device of the present invention for achieving the above-mentioned purpose comprises: a pole assembly that is coupled to the end of a low-voltage pole and raises the pole height by the length of the raising device; and a band that is fastened to a section of the pole joint length of the pole assembly, wherein the pole assembly is characterized by having a fastening hole formed in accordance with the position where a low-voltage power line is installed.

[0010] Preferably, the above-mentioned pole assembly is formed in a cylindrical shape that encloses the pole end.

[0011] Preferably, the pole assembly sets the pole joint length in the lower section, and the ratio of the upward device length to the pole joint length is set to 1:0.2.

[0012] Preferably, the pole assembly forms the fastening hole in the upper section of the pole joint length, a fastening bolt is fastened in the fastening hole, and a rack for attaching the low-voltage wire is installed on the fastening bolt.

[0013] Preferably, the band is composed of a first band and a second band that are spaced apart in the section of the aforementioned pole joint length.

[0014] *14 In addition, the pole ground clearance raising device of the present invention for achieving the above-mentioned purpose comprises: a pole assembly that is coupled to the end of a low-voltage pole and raises the pole height by the length of the raising device; a band that is fastened to the lower section of the pole assembly; a fastening bolt that is fastened to a fastening hole formed above the lower section of the pole assembly; and a rack that is fastened to the fastening bolt, wherein a low-voltage power line is installed on the rack.

[0015] Preferably, the cylindrical lower section of the pole assembly that surrounds the pole end is set to a pole joining length in which the first band and the second band of the band are joined at a distance, and the ratio of the upward device length to the pole joining length is set to 1:0.2.

[0016] Preferably, the above-mentioned pole assembly divides the fastening holes into first, second, third, and fourth fastening holes at bolt fastening intervals, and the fastening bolts are fastened to each of the first, second, third, and fourth fastening holes, and the racks are composed of first, second, third, and fourth racks according to the number of the first, second, third, and fourth fastening holes.

[0017] And the method for raising the ground height using the pole ground height raising device of the present invention to achieve the above-mentioned purpose comprises the steps of: confirming the installation location of the pole ground height raising device on a low-voltage pole selected to raise the pole ground height; covering the end of the pole of the low-voltage pole with the cylindrical pole assembly of the pole ground height raising device and fixing the pole assembly by fastening a band to the pole joint length that wraps around the end of the pole; fastening a fastening bolt into the fastening hole of the pole assembly and installing a rack on the fastening bolt; and installing a low-voltage power line on the rack.

[0018] Preferably, the pole ground clearance raising device sets a predetermined upward device fixing height from the final step bolt of the low-voltage pole to the installation position, and raises the pole ground clearance height of the low-voltage pole from 10m to 12m.

[0019] Preferably, the above-mentioned pole assembly is divided into first, second, third, and fourth fastening holes in which the fastening bolts are each fastened at bolt fastening intervals, and the rack is composed of first, second, third, and fourth racks according to the number of first, second, third, and fourth fastening holes, and the low-voltage wire is installed on each of the first, second, third, and fourth racks. Effects of the invention

[0020] The method for raising the ground clearance using the pole ground clearance raising device of the present invention provides tangible and intangible effects through the dual construction methods of pole replacement and non-replacement.

[0021] First, the tangible effect is achieved by excluding the cost of design changes, such as the installation or removal of low-voltage poles, from the problem of incurring investment costs by replacing 10m poles with 12m poles of higher specifications regardless of condition in order to obtain an appropriate ground clearance due to reasons such as the installation of low-voltage cables dedicated to low-voltage power common transformers, the addition of three-phase low-voltage power lines, and the addition of shared poles.

[0022] Secondly, the intangible effect is the securing of “constructability, economic efficiency, and safety” through the reduction of utility pole replacement work. The aforementioned constructability allows for convenient securing of ground clearance and reduction of work time without replacement by installing simple devices on existing poles. The aforementioned economic efficiency enables the maximization of investment cost savings by requiring only material and labor costs through the installation of upward-facing pole supports. Finally, the aforementioned safety is achieved by enhancing worker safety and efficiency during on-site construction through the simplification of work procedures by utilizing existing poles. Brief explanation of the drawing

[0023] FIG. 1 is a configuration diagram of a pole ground clearance raising device according to the present invention, FIG. 2 is a flowchart of a method for raising the ground clearance using a pole ground clearance raising device according to the present invention, and FIG. 3 is an example of a three-phase low-voltage power line construction and a two-stage line construction for a distributed power dedicated cable using a pole ground clearance raising device according to the present invention. Specific details for implementing the invention

[0024] Embodiments of the present invention will be described in detail below with reference to the attached illustrative drawings. Since these embodiments are merely examples and can be implemented in various different forms by those skilled in the art to which the present invention pertains, the embodiments described herein are not limited to the examples described herein.

[0025] Referring to FIG. 1, the pole ground clearance raising device (1) includes a pole assembly (10), a band (20), and a fastening bolt (30).

[0026] Through this, the above-described pole ground height raising device (1) fixes the cap-shaped pole assembly (10) to the top (i.e., the end of the pole) of the low-voltage pole (100) with a band (20) to raise the pole ground height (H) by the length (L) of the pole assembly (10) upward, and the height of the low-voltage pole (100) can be changed from a pole ground height of 10m to a pole ground height of 12m of a higher standard without replacing the 10m pole through the length (L) of the pole upward device of 2m.

[0027] Therefore, the above-mentioned utility pole ground clearance raising device (1) allows for the saving of investment costs that would otherwise be incurred when replacing a 10m utility pole with a 12m utility pole of a higher standard regardless of condition in order to obtain an appropriate ground clearance due to reasons such as the installation of a low-voltage cable dedicated to a low-voltage power supply three-phase addition distributed power common transformer or the addition of a joint.

[0028] Specifically, the above-mentioned pole assembly (10) is a cylindrical body (11) made of a single material that takes into account pole strength and safety factor, and has a cylindrical structure of a predetermined thickness, and a fastening hole (13) is drilled in the cylindrical body (11) through a fastening bolt (30) so that a rack (40) (see FIG. 3) can be installed on the pole assembly (10).

[0029] For example, the above-mentioned fastening hole (13) is composed of four first, second, third, and fourth fastening holes (13a, 13b, 13c, 13d), and the first, second, third, and fourth fastening holes (13a, 13b, 13c, 13d) are similarly formed as female screw holes in which a fastening bolt (30) is fastened, which are approximately “C” shaped (see FIG. 3) by pressing them against the cylindrical body (11). In this case, the number of the first, second, third, and fourth fastening holes (13a, 13b, 13c, 13d) may be changed according to the number of low-voltage wires (200), such as three or fewer or five or more.

[0030] Additionally, based on the upward device length (L) of the cylindrical body (11), a section of the total joint length (a) is set at the lower part of the cylindrical body, and a section of the bolt fastening interval (b) is set for the first fastening hole (13a) and the second fastening hole (13b), the second fastening hole (13b) and the third fastening hole (13c), and the third fastening hole (13c) and the fourth fastening hole (13d) at the upper part of the total joint length (a).

[0031] In particular, the above-described pole assembly (10) sets a pole joint length (a) from a position that is separated from the upper step bolt (110) of the low-voltage pole (100) by the step bolt spacing (h) and the final step bolt (120) installed above it by the upward device fixing height (K), and the pole joint length (a) wraps around the end portion of the pole at the pole ground height (H) excluding the upward device fixing height (K). In this case, the pole ground height (H) is 10m, the step bolt spacing (h) is 450mm, and the upward device fixing height (K) is 750mm.

[0032] For example, the ratio of the above upward device length (L), the above pole joint length (a), and the above bolt fastening spacing (b) is 1 (L) : 0.2 (a) : 0.15 (b), and numerically, the above upward device length (L) is about 2 m, the above pole joint length (a) is about 400 mm, and the above bolt fastening spacing (b) is about 300 mm.

[0033] And the above band (20) is applied to the section of the pole joint length (a) of the cylindrical body (11) that wraps around the end portion of the pole of the low-voltage pole (100) (i.e., the upper section of the upward device fixing height (K)), so that the pole assembly (10) can be fixed to the top of the low-voltage pole (100) by the band fixing force.

[0034] In particular, the above band (20) strengthens the fixing force with two first and second bands (20a, 20b) having the same structure, and the first and second bands (20a, 20b) are tied together at appropriate intervals along the section of the pole joint length (a). In this case, each of the first and second bands (20a, 20b) may be an iron band or a butterfly handle iron band, etc.

[0035] In addition, the above-mentioned fastening bolt (30) is fastened to each of the four first, second, third, and fourth fastening holes (13a, 13b, 13c, 13d) using a hexagonal bolt (e.g., M14) to be assembled with the cylindrical body (11), and allows a rack (40) (see FIG. 3) for installing a low-voltage power line (200) to be installed.

[0036] FIG. 2 is a flowchart of a method for raising the ground height using a pole ground height raising device according to the present invention, comprising the steps of: S1, selecting a low-voltage pole to be replaced; S2, confirming the installation location of the raising device on the low-voltage pole; S3, covering the raising device on the low-voltage pole and fixing it with a band; S4, fastening a bolt into the hole of the raising device; S5, installing a rack on the bolt; and S6, installing a low-voltage power line on the rack.

[0037] Referring to FIG. 3, the low-voltage pole (100) can be exemplified by a three-phase line with a large sag of wires due to the long span and high residential area during the construction of a three-phase low-voltage wire (200), or a two-stage line of a low-voltage wire (200) for a private PPA (Power Purchase Agreement) where the ground clearance is insufficient.

[0038] The above selection of low-voltage poles to be replaced (S1) is applied only to the long-length reinforcement of existing low-voltage poles (100) with a 10M CP pole, and is restricted in use for poles with a long span of 12m or more, a horizontal angle exceeding 10°, or extreme low-lying areas, taking into account pole strength and safety factor.

[0039] The confirmation of the upward device installation location (S2) on the above low-voltage utility pole is performed by a worker stepping on the footrest bolt of the low-voltage utility pole (100) and confirming the upward device fixing height (K) of 750mm from the final footrest bolt (120) of the upper footrest bolt (110).

[0040] The above upward device is placed over the low-voltage utility pole and fixed with a band (S3) by placing the lower part of the utility pole assembly (10) over the end portion of the low-voltage utility pole (100) and positioning it up to the upward device fixing height (K) of 750 mm, and then the first band (20a) and the second band (20b) are sequentially connected in the utility pole joining length (a) section of the utility pole assembly (10). In this case, the utility pole assembly (10) aligns the first, second, third, and fourth fastening holes (13a, 13b, 13c, 13d) in the direction in which the low-voltage power line (200) of the low-voltage utility pole (100) is installed.

[0041] The bolt fastening (S4) in the hole of the above-mentioned upward device is a process of fastening the pole assembly (10) and the fastening bolt (30), which is completed by fastening each of the four fastening bolts (30) to the four first, second, third, and fourth fastening holes (13a, 13b, 13c, 13d). Then, the rack installation (S5) on the bolt is completed by fastening four first, second, third, and fourth racks (40a, 40b, 40c, 40d) using each of the four fastening bolts (30) fastened to the first, second, third, and fourth fastening holes (13a, 13b, 13c, 13d). In this case, the number of fastening bolts (30) is adjusted to the number of low-voltage wires (200), so they can be fastened to a maximum of 4 and less than that, and the number of racks (40) is also installed in the same way as the number of fastening bolts (30).

[0042] Finally, the installation of low-voltage wires (S6) on the racks is completed by installing low-voltage wires (200) on each of the first, second, third, and fourth racks (40a, 40b, 40c, 40d).

[0043] As described above, the method of raising the ground height using the pole ground height raising device (1) according to the present embodiment is such that a pole assembly (10) of the length (L) of the raising device wraps around the end of a low-voltage pole (100) that needs to have its ground height (H) raised, and is fixed with first and second bands (20a, 20b), and a low-voltage wire (200) is wired through first, second, third, and fourth racks (40a, 40b, 40c, 40d) which are connected to fastening bolts (30) located in each of the first, second, third, and fourth fastening holes (13a, 13b, 13c, 13d). Through this, it is possible to reduce investment costs by diversifying the construction method to include not only pole replacement but also pole-free replacement using the ground height raising device, depending on the site conditions, at locations where there is a concern about insufficient ground height of low-voltage wires at the low-voltage pole installation site. Explanation of the symbols

[0044] 1 : Jeonju ground clearance raising device 10 : Pre-position assembly 11 : Cylindrical body 13: Fastening hole 13a, 13b, 13c, 13d: 1st, 2nd, 3rd, 4th fastening holes 20 : Band 20a, 20b: 1st and 2nd bands 30: Fastening bolt 40 : Rack 40a, 40b, 40c, 40d: 1st, 2nd, 3rd, 4th racks 100 : Low voltage utility pole 110: Top footrest bolt 120: Final footrest bolt 200 : Low voltage wire

Claims

Claim 1 A pole assembly that is coupled to the end of a low-voltage pole and raises the pole height by the length (L) of an upward device; a band that is fastened to the lower section of the pole assembly; and a fastening bolt that is fastened to a fastening hole formed at a bolt fastening interval (b) above the lower section of the pole assembly. and includes a rack fastened to the above-mentioned fastening bolt, and a low-voltage power line is installed on the rack; the pole assembly sets the pole joint length (a) in the lower section from a position located above the upper footrest bolt of the low-voltage pole at a footrest bolt spacing (h) and the final footrest bolt installed above it, and at an upward device fixing height (K); the ratio of the upward device length (L) to the pole joint length (a) of the pole assembly is 1:0.2; the pole assembly divides the fastening holes into first, second, third, and fourth fastening holes at bolt fastening intervals, and the fastening bolt is fastened to each of the first, second, third, and fourth fastening holes; the rack is composed of first, second, third, and fourth racks corresponding to the number of the first, second, third, and fourth fastening holes; the fastening bolt is a hexagonal bolt fastened to each of the first, second, third, and fourth fastening holes and assembled with the cylindrical body of the pole assembly; A utility pole ground clearance raising device with an iron band and a hexagonal fastening bolt, characterized in that the band strengthens the fixing force with two first and second bands having the same structure, and each of the first and second bands is an iron band or a butterfly handle iron band.

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