Indirect live-line crossarm extension arm, method for ensuring safe distances during indirect live-line work using the same, and indirect live-line uninterrupted power distribution method based on the method for ensuring safe distances during indirect live-line work.

Abstract

The present invention relates to an indirect live-line crossarm extension arm for performing uninterruptible power distribution work by indirect live-line work, and more specifically, to an indirect live-line uninterruptible power distribution work method based on the said indirect live-line work method, which enables workers to safely enter a power distribution line during indirect live-line work and maintain a safe working distance while performing indirect live-line work such as changing utility poles, replacing crossarms, replacing suspension insulators, replacing LP insulators, adjusting the separation, installing and removing LAs, installing new interceptor poles, replacing utility poles, installing and removing protective equipment, replacing jumper wires, replacing wires, inspecting individual lines, and installing and removing switches on one or more power distribution lines and their upper distribution lines.

Description

Technical Field

[0001] The present invention relates to a method for securing a safety distance for indirect live-line work on a distribution line in a live state, and a method for performing uninterruptible power distribution work via indirect live-line work based on the safety distance securing method. More specifically, the present invention relates to an extension arm for an indirect live-line crossarm, which secures a sufficient safety distance for indirect live-line work on one or more distribution lines, and in the state where the safety distance is secured, enables simple and safe execution of operations including utility pole modification, crossarm replacement, suspension insulator replacement, LP insulator replacement, separation distance adjustment, LA installation and removal, interruption pole new installation, utility pole replacement, protective equipment installation and removal, jumper wire replacement, electric wire replacement, line-specific inspection, and switch installation and removal on one or more distribution lines and their upper-stage distribution lines via indirect live-line work, and also relates to a safety distance securing method for indirect live-line work using the same, and an indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work.

Background Art

[0002] In recent years, along with the rapid increase in power demand, power facilities to cope with such demand have been continuously expanded. As power users' requirements for power quality rise, even momentary power outages become a subject of complaints, and the actual situation is that collective actions and lawsuit cases by power users aiming at compensation claims are increasing. Therefore, in order to supply high-quality power during distribution work, uninterruptible construction methods that perform construction without interrupting power supply have been implemented.

[0003] On the other hand, conventional distribution work by uninterruptible construction methods includes a mobile transformer vehicle method, a bypass jumper cable method, a construction switch method, and the like. However, in the bypass jumper cable method, with a cable vehicle, cables required for the work section, construction switches, a mobile transformer vehicle, a live-line bucket truck, and a full set of live-line work tools prepared, bypass cables and the like are installed via direct live-line work to bypass the power supply. After that, distribution line replacement, crossarm replacement and relocation work are carried out, and the bypass cables and the like are removed via direct live-line work, thereby completing the distribution work.

[0004] Furthermore, for power distribution lines with an electrical capacity exceeding 5,000 kW, the allowable capacity of existing cables used for the conventional bypass jumper cable method is 5,000 kW or less. Therefore, in order to reduce the capacity of the power distribution line to 5,000 kW or less, it is necessary to switch the power load to other power distribution lines. As a result, a great deal of time and labor costs are wasted, and serious problems arise in the operation of the power distribution line system.

[0005] Therefore, in recent years, indirect live-line work, which involves performing work indirectly using insulated tools such as live-line work sticks, has been utilized to solve the aforementioned problems.

[0006] However, while the aforementioned general indirect live-line work is very useful for working on a single circuit of a power distribution line, when there are one or more power distribution lines arranged above and below each other, it is difficult to ensure a sufficient safe clearance distance for indirect live-line work while working on the upper power distribution line, and there is a need to establish appropriate work methods.

[0007] Consequently, there were situations where work had to be carried out during power outages, and construction costs increased by 3 to 10 times. Furthermore, even when bypass cable construction was used to carry out work without power outages, there was a problem of frequent switchgear malfunctions during construction. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Korean Patent Publication No. 10-2010-0036065 [Patent Document 2] Korean Patent Registration No. 10-2161405 [Patent Document 3] Korean Patent Registration No. 10-2232560 [Overview of the project] [Problems that the invention aims to solve]

[0009] The present invention was devised to solve the aforementioned problems and aims to provide an indirect live-line crossarm extension arm for extending the crossarms of power distribution lines by indirect live-line work and ensuring a safe distance for indirect live-line work, a method for ensuring a safe distance for indirect live-line work using the same, and an indirect live-line uninterrupted power distribution method based on the method for ensuring a safe distance for indirect live-line work.

[0010] Another object of the present invention is to provide an indirect live-line crossarm extension arm that enables indirect live-line work such as changing utility poles, replacing crossarms, replacing suspension insulators, replacing LP insulators, adjusting the separation, installing and removing LAs, installing new interceptor poles, replacing utility poles, installing and removing protective equipment, replacing jumper wires, replacing electric wires, inspecting individual lines, and installing and removing switches for one or more distribution lines and their upper distribution lines, by ensuring a safe distance for indirect live-line work through the extension of crossarms and the movement of electric wires for one or more distribution lines above and below, thereby enabling workers to safely enter and maintain a safe working distance when performing indirect live-line work on distribution lines, as well as a method for ensuring a safe distance for indirect live-line work using the same, and an indirect live-line uninterrupted power distribution method based on the method for ensuring a safe distance for indirect live-line work. [Means for solving the problem]

[0011] To achieve the aforementioned objective, the indirect live-line crossarm extension arm of the present invention has a tubular connecting portion that is open forward and connected to the end of the crossarm of a utility pole; An extension formed by extending from the rear end of the aforementioned joint and having a plurality of mounting holes; and The connection portion includes mounting means that are provided on the connection portion and apply fixing force to fasten the connection portion to the arm,

[0012] The aforementioned mounting means is A support plate formed in a plate shape extending in the longitudinal direction from front to back, with spacers formed on all four sides in the middle section, a guide pin formed in the center of the rear end, a spring support pin formed in the middle section, and a horizontally elongated lever guide hole formed on the rear side of the spring support pin;

[0013] An operating plate that is housed between the spacers and slides back and forth, has a locking extension formed at its tip, a horizontal elongated spring guide groove formed through its front middle portion through which the spring support pin passes, a spring elastically provided on the spring support pin to provide forward movement force, and a guide pin guide groove formed at its rear end to house and guide the guide pin;

[0014] A pair of fasteners are provided on both sides in the width direction, each having its rear end axially coupled to the front of the support pin, with a pivot and release spring elastically provided to have an elastic force that opens the front, with pin fixing grooves formed on the opposing front sides, and locking grooves having rearward-expanding steps into which the locking extensions of the operating plates engage; and The support plate includes an operating lever that passes through a lever guide hole and is connected to the operating plate, and applies a backward movement force to the operating plate from the outside by indirect live-line work using a live-line work stick.

[0015] Furthermore, the method for ensuring a safe distance during indirect live-line work using an extension arm for indirect live-line crossarms involves performing indirect live-line work on one or more extra-high voltage distribution lines vertically using an extension arm for indirect live-line crossarms, and this method is: A preparatory step for moving to a power distribution line using a live-line bucket, carrying live-line work equipment such as a live-line work stick and an indirect live-line crossarm extension arm for extending crossarms; A crossarm extension process in which an indirect live-line crossarm extension arm is attached to one or both sides of a crossarm on a power distribution line by indirect live-line work using a live-line work stick and live-line work equipment; A work safety distance securing process that involves moving the power lines of the distribution line to the extension arm of the crossarm for indirect live-line work, thereby securing a safe distance for indirect live-line work; A wire restoration process in which the wires of the distribution line that have been moved to the extension arm for indirect live lines are moved back to the crossarm and restored; and This process includes a finishing step of removing live-line work equipment such as extension arms for indirect live-line crossarms using live-line work sticks and live-line work equipment.

[0016] Further, the indirect live-wire uninterruptible power distribution method based on the safety distance securing method for indirect live-wire work using the indirect live-wire crossarm extension arm implements indirect live-wire work on one or more extra-high voltage distribution lines arranged vertically by using the indirect live-wire crossarm extension arm, and this method includes: A work preparation step of carrying live-wire work equipment such as the indirect live-wire crossarm extension arm for crossarm extension, including a live-wire work stick, and moving to the distribution line using a live-wire bucket; A crossarm extension step of extending the crossarm by coupling the indirect live-wire crossarm extension arm to one side or both sides of the crossarm of the distribution line through indirect live-wire work using the live-wire work stick and the live-wire work equipment; A work safety distance securing step of moving the electric wire of the distribution line to the indirect live-wire crossarm extension arm to secure a safety distance for indirect live-wire work; A main work step in which a worker performs indirect live-wire work on the distribution line using the live-wire bucket after the safety distance for indirect live-wire work on the distribution line is secured; An electric wire restoration step of, in a state where the indirect live-wire work on the distribution line is completed, moving the electric wire of the distribution line that has been relocated to the indirect live-wire crossarm extension arm back to the crossarm for restoration; and A finishing step of removing the live-wire work equipment such as the indirect live-wire crossarm extension arm using the live-wire work stick and the live-wire work equipment.

Effects of the Invention

[0017] According to the present invention configured as described above, the following effects are achieved. According to the indirect live-wire crossarm extension arm of the present invention, the safety distance securing method for indirect live-wire work using the same, and the indirect live-wire uninterruptible power distribution method based on the safety distance securing method for indirect live-wire work, the safety distance for indirect live-wire work can be secured by extending the crossarm, and safe indirect live-wire work on distribution lines can be realized.

[0018] Furthermore, even when one or more power distribution lines are present in the vertical direction, with the safety distance for indirect live-line work secured by the extension of the crossarm and the movement of the electric wire, it is possible to safely and reliably perform various indirect live-line works on one or more power distribution lines and the upper-stage power distribution lines thereof, including utility pole modification, crossarm replacement, suspension insulator replacement, LP insulator replacement, separation distance adjustment, LA installation and removal, interrupting pole new installation, utility pole replacement, protective equipment installation and removal, jumper wire replacement, electric wire replacement, line-specific inspection, and switch installation and removal. [Modes for Carrying Out the Invention]

[0019] Terms or words used in the present specification and claims should not be construed as limited to their ordinary or dictionary meanings, and must be construed as meanings and concepts consistent with the technical idea of the present invention on the basis of the principle that the inventor may appropriately define the concept of the terms to describe the invention in the best possible manner.

[0020] Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and do not represent the entire technical idea of the present invention, so it should be understood that various equivalents and modifications that may replace them may exist at the time of the present application.

[0021] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0022] Figure 1 is a perspective view of the first embodiment of the indirect live-line crossarm extension arm of the present invention; Figure 2 is a cross-sectional view of the first embodiment of the indirect live-line crossarm extension arm of the present invention; Figure 3 is a perspective view of the second embodiment of the indirect live-line crossarm extension arm of the present invention; Figure 4 is a cross-sectional view of the second embodiment of the indirect live-line crossarm extension arm of the present invention; Figure 5 is a perspective view of the third embodiment of the indirect live-line crossarm extension arm of the present invention; Figure 6 is a cross-sectional view of the third embodiment of the indirect live-line crossarm extension arm of the present invention; Figure 7 is a perspective view of the main parts of the mounting means of the indirect live-line crossarm extension arm of the present invention; Figure 8 is an exploded perspective view of the main parts of the mounting means of the indirect live-line crossarm extension arm of the present invention; and Figure 9 is a cross-sectional view of the main parts of the indirect live-line crossarm extension arm of the present invention.

[0023] As shown in Figures 1 to 9, the indirect live-line crossarm extension arm 1 of the present invention includes a connecting portion 100, an extension portion 200, and a mounting means 300.

[0024] First, the connecting portion 100 is configured to be connectable to the end of a crossarm provided on a utility pole, in order to constitute the indirect live-line crossarm extension arm 1 of the present invention.

[0025] Therefore, the connecting portion 100 is formed in a tubular shape that is open to the front so that it can be connected to the arm, and is preferably formed in a rectangular tubular shape.

[0026] The extension portion 200 is formed as an extension to the rear end of the coupling portion 100 when constituting the indirect live-line crossarm extension arm 1 of the present invention, and is preferably configured to be extendable via a coupling structure.

[0027] In this case, the extension 200 is formed in a rectangular tubular shape, similar to a normal crossarm, and multiple mounting holes 210 are formed in the middle section, penetrating vertically or horizontally, allowing for the attachment of bolt shackles or the like for attaching LP insulators or suspension insulators.

[0028] The mounting means 300 is provided on the connecting portion 100 when forming the indirect live-line crossarm extension arm 1 of the present invention, and is configured to enable stable mounting and fixing by applying a fastening force when connecting the connecting portion 100 to the crossarm.

[0029] Therefore, the mounting means 300 first includes a support plate 310, and the support plate 310 is formed in the shape of a plate extending in the front-rear direction. In the present invention, the support plate 310 can be configured as a single member or a pair of members symmetrically spaced apart, depending on the first to third embodiments of the connecting portion 100 described later.

[0030] In this configuration, spacers 311 are formed to protrude from all four sides of the surface of the support plate 310, a guide pin 312 is formed to protrude from the center of the rear end of the support plate 310, and a spring support pin 313 is formed to protrude from the middle section. Furthermore, a horizontally elongated lever guide hole 314 extending in the front-rear direction is formed through the rear side of the spring support pin 313. When composed of a pair of support plates 310, these support plates can be connected so as to be spaced apart via the spacers 311, guide pin 312, and spring support pin 313.

[0031] Furthermore, the mounting means 300 includes an operating plate 320 configured to be guided by the support plate 310. The operating plate 320 is housed between the spacers 311 and is configured to be slidable in the front-rear direction.

[0032] In this case, the operating plate 320 includes a locking extension 321 that is formed as an extension on its tip side and is configured to restrict the expansion of the fasteners 330 and 330', which will be described later.

[0033] Furthermore, the operating plate 320 includes a horizontally elongated spring guide groove 322 formed through the front middle section, into which the spring support pin 313 is inserted at the rear. A spring 323 is elastically positioned between the spring support pin 313 and the spring guide groove 322, thereby providing a forward moving force to the operating plate 320.

[0034] Furthermore, the actuation plate 320 is formed in a rearward-opening shape and includes a guide pin guide groove 324 at its rear end, which houses and guides the guide pin 312. This allows the actuation plate 320 to slide stably along the guide groove.

[0035] Furthermore, the mounting means 300 includes a pair of fasteners 330, 330' on both sides in the width direction that expand or fold in response to the restrictive operation caused by the sliding of the operating plate 320, and apply a fastening force to the arm.

[0036] In this configuration, each fastener 330, 330' is rotatably connected at its rear end to the front side of the support plate 310 by an axis 331, and is configured to pivot in opposite directions in the width direction. Each fastener is also elastically provided with an opening spring 332, which has an elastic force in the direction that causes the front end to expand.

[0037] Each fastener 330, 330' includes a pin fixing groove 333 formed in a semi-circular shape on the front side facing each other, and a locking groove 334 formed on the rear side facing each other, into which the locking extension 321 of the operating plate 320 engages.

[0038] In this case, it is preferable that the locking groove 334 be configured to have a step. That is, by forming a step structure in which the front side is narrower and the rear side is wider, when the locking extension portion 321 of the operating plate 320 is located on the front side of the locking groove 334, the release spring 332 is compressed, the front ends of the fasteners 330 and 330' are folded inward, and the pin fixing groove 333 is closed. On the other hand, when the locking extension portion 321 is located on the rear side of the locking groove 334, the front ends of the fasteners 330 and 330' are expanded outward by the elastic force of the release spring 332, and the pin fixing groove 333 is opened.

[0039] Furthermore, the mounting means 300 includes an operating lever 340 for selectively restricting the sliding movement of the operating plate 320.

[0040] At this time, the operating lever 340 is connected to the operating plate 320 by passing through the lever guide hole 314 formed in the support plate 310.

[0041] Furthermore, the mounting means 300 includes an actuation plate 320 configured to be guided by a support plate 310. The actuation plate 320 is housed between spacers 311 and configured to slide in the front-rear direction. An actuation lever 340 protruding from the support plate can be operated externally using a standard live-line work stick.

[0042] Specifically, referring to Figure 10, by pulling the operating lever 340 of the mounting means 300 backward, the operating plate 320 moves backward in conjunction with it. At this time, the locking extension 321 of the operating plate 320 moves to the rear side of the locking groove 334, and the fasteners 330 and 330' pivot around the shaft 331 due to the elastic force of the release spring 332, and their front ends expand outward, opening the pin fixing groove 333. When the operating force acting on the operating lever 340 is released in this state, the operating lever becomes locked to the stepped portion of the locking groove 334, which has a stepped shape.

[0043] Subsequently, when a bolt for fixing a bracket, a fixing pin for an insulator, or a bolt shackle fixing pin (cotter pin), etc., which are normally provided on a bracket, is inserted into the opened pin fixing groove 333 and the pin fixing groove 333 is pressed, the fasteners 330 and 330' are expanded to a predetermined angle, the operating plate 320 moves forward due to the elastic restoring force of the spring 323, and the locking extension 321 is inserted into the locking groove 334. At this time, the pin fixing groove 333 is closed, and the bolt for fixing a bracket, the fixing pin for an insulator, or a bolt shackle fixing pin (cotter pin), etc., is engaged and securely fastened and fixed.

[0044] On the other hand, the indirect live-line crossarm extension arm 1 of the present invention can be configured to be extendable in various ways to pin-pole crossarms, built-in pole crossarms, or single built-in pole crossarms in power distribution lines, through various embodiments of the coupling portion 100.

[0045] First, the coupling portion 100 according to the first embodiment may include a coupling portion 110 for pin poles that can be applied to a crossarm provided on a pin pole of a power distribution line.

[0046] Therefore, referring to Figures 1 and 2, the pin column joint 110 includes a bracket insertion space 111 which is hollow inside and open to the front, allowing the pin column bracket to be inserted.

[0047] Furthermore, the pin post joint portion 110 is cut out to open forward and includes a bracket guide groove 112 formed on its upper surface to allow the bracket to enter the bracket insertion space 111.

[0048] Furthermore, the pin post coupling portion 110 is open to the front and includes a pair of fixing pin guide grooves 113 formed by cutouts in the middle of both sides, so as to accommodate fixing pins (not shown) and the like that are provided in conjunction with the pin post bracket.

[0049] Furthermore, the pin-post coupling portion 110 is formed such that the upper parts of both sides protrude forward with respect to the fixing pin guide groove 113 and are inclined downward at a predetermined angle, and when the pin-post coupling portion 110 is installed, it includes a pin-hooking portion 114 that is configured to be able to be hooked onto the fixing pin provided as described above.

[0050] The pin post joint 110 communicates with the bracket insertion space 111 and includes a work hole 115 formed through its bottom surface to allow tools and the like to enter.

[0051] Furthermore, the pin post coupling portion 110 further includes a mounting means housing 116 formed on one side to constitute the mounting means 300. In this case, the mounting means housing 116 is open to the front and includes a fixing pin guide groove 117 formed at the tip of one side corresponding to the fixing pin guide groove 113, and a lever through-hole 118 formed in the middle corresponding to the lever guide hole 314 of the support plate 310.

[0052] Accordingly, the mounting means 300 is configured such that the support plate 310 is fixed to the inner surface of the mounting means housing 116 so that the fasteners 330 and 330' are positioned forward when mounted, and one end of the release spring 332 is elastically provided behind the fasteners 330 and 330', while the other end is supported on the side surface of the mounting means housing 116, thereby providing an elastic force that expands the fasteners 330 and 330'.

[0053] Furthermore, when installed, the operating lever 340 is fixed to the operating plate 320 by passing through the lever through-hole 118 and the lever guide hole 314.

[0054] Therefore, when applying the configuration of the joint 100 to the joint 110 for a pin post, as shown in Figure 11, a separate fixing pin 25 for installing the indirect live-line crossarm extension arm 1 of the present invention can be provided by horizontally inserting it into the pin post crossarm 21a.

[0055] Then, the fixing pin 25 is connected to the pin column bracket 21a via the pin column connecting portion 110, and with the upper part of the fixing pin 25 supported by the pin hanging portion 114, the pin column bracket 21a is horizontally connected so that it fits into the bracket guide groove 112 formed at the top.

[0056] Accordingly, the fixing pin 25 is inserted into and engaged with the fixing pin guide groove 113, and the end of the pin post bracket 21a is inserted into the bracket insertion space 111. At this time, interference with the LP insulator 52 is prevented via the bracket guide groove 112 formed at the top, and the indirect live-line bracket extension arm 1 of the present invention can be connected to the pin post bracket 21a via this pin post coupling part 110. When connected in this manner, the extension part 200 protrudes horizontally, making it possible to extend the length of the pin post bracket 21a.

[0057] On the other hand, as mentioned above, when fastening and fixing the mounting means 300 when connecting the pin post joint 110, by operating the operating lever 340 with a live-line work stick as described above, the fixing pin 25 can be engaged with the fasteners 330 and 330' through the expansion or folding operation of the fasteners 330 and 330', thereby fastening and fixing.

[0058] Furthermore, the coupling portion 100 according to the second embodiment may include a coupling portion 120 for an internal pole that is configured to be applicable to the internal pole bracket of a power distribution line.

[0059] Therefore, referring to Figures 3 and 4, the internal column joint 120 first includes a bracket insertion space 121 that is open to the front and has a hollow interior, so that the internal column bracket can be inserted into it.

[0060] The internal column connection is notched to open forward and includes a pair of pin guide grooves 122 formed in the center of the upper and lower surfaces to guide the cotter pin of a bolt shackle (not shown) for installing a suspension insulator on the internal column bracket.

[0061] Furthermore, the joint for the internal column includes a pair of bolt guide grooves 123 formed on both sides, with the intermediate section open forward to accommodate bolts (not shown) for connecting the internal column brackets.

[0062] The internal column coupling further includes a mounting means housing 125 formed on one side to constitute the mounting means 300. In this case, the mounting means housing 125 is open to the front and includes a bolt guide groove 126 formed at the tip corresponding to the bolt guide groove 123, and an elongated lever through hole 127 formed in the middle corresponding to the lever guide hole 314 of the support plate 310.

[0063] Furthermore, the joint for the built-in column includes an inclined reinforcing portion 128 that protrudes from the other side so that it can be inserted and installed by passing inside the bolt shackle, which is normally formed by bending.

[0064] Accordingly, the mounting means 300 is configured such that when the fasteners 330 and 330' are positioned forward, the support plate 310 is fixed to the inner surface of the mounting means housing 125, and one end of the release spring 332 is elastically provided behind the fasteners 330 and 330', with the other end supported on the side surface of the mounting means housing 125, thereby providing an elastic force that expands the fasteners 330 and 330'.

[0065] The operating lever 340 is then fixed to the operating plate 320 by passing through the lever through-hole 127 and the lever guide hole 314 when installed.

[0066] Therefore, when applying the configuration of the joint 100 to the joint 120 for the internal column, as shown in Figure 12, the joint 120 for the internal column is connected to the internal column bracket 21b, and the end of the internal column bracket 21b is inserted horizontally into the bracket insertion space 121 of the joint 120 for the internal column.

[0067] At this time, the internal column joint 120 is guided by the cotter pin 26a of the bolt shackle 26 being housed in the pin guide grooves 122 formed on its upper and lower parts, and the inclined reinforcing part 128 formed on the other side is inserted inside the bolt shackle 26 and supported. The M bolts 27 that connect the internal column brackets 21b on both sides are housed in the bolt guide groove 123 and the bolt guide groove 126, so they can be installed without interfering with the bolt shackle 26 and the M bolts 27.

[0068] Accordingly, the indirect live-line crossarm extension arm 1 of the present invention can be connected to the internal pole crossarm 21b via the internal pole connection part 120. This connection allows the extension part 200 to protrude horizontally, thereby extending the length of the internal pole crossarm 21b.

[0069] On the other hand, when fastening and securing the mounting means 300 when connecting the internal column joint 120, as described above, by operating the operating lever 340 with a live-line work stick, the cotter pin 26a can be engaged with the fasteners 330 and 330' through the expansion or folding operation of the fasteners 330 and 330', thereby fastening and securing.

[0070] Furthermore, the coupling portion 100 according to the third embodiment may include a coupling portion 130 for a single integrated pole that is applicable to a single integrated pole crossarm for a power distribution line.

[0071] Therefore, referring to Figures 5 and 6, the single-integrated column connector 130 is first configured to have a diameter smaller than the diameter of the single-integrated column bracket so that it can be inserted into the single-integrated column bracket.

[0072] Furthermore, the joint for the single internal column is notched to open forward and includes a pair of pin guide grooves 131 formed in the center of the upper and lower surfaces to guide the cotter pin of a bolt shackle (not shown) for installing a suspension insulator on the crossarm for the single internal column.

[0073] Furthermore, the single-integrated column connector includes a lever through-hole 132 formed through the upper surface at a position behind the pin guide groove 131, corresponding to the lever guide hole 314.

[0074] Accordingly, the mounting means 300 is configured such that when the fasteners 330 and 330' are positioned forward, the support plate 310 is fixed to the upper inner part of the single internal column coupling 130, and one end of the release spring 332 is elastically provided behind the fasteners 330 and 330', with the other end supported on the side of the single internal column coupling 130, thereby providing an elastic force that expands the fasteners 330 and 330'.

[0075] Furthermore, when installed, the operating lever 340 is fixed to the operating plate 320 by passing through the lever through-hole 132 and the lever guide hole 314.

[0076] Therefore, when applying the configuration of the joint 100 as described above to the joint 130 for a single internal column, as shown in Figure 13, the joint 130 for a single internal column is connected to the bracket 21c for a single internal column, and the joint 130 for a single internal column is inserted horizontally into the end of the bracket 21c for a single internal column.

[0077] At this time, the single-piece internal column joint 130 accommodates and guides the cotter pin 26a of the bolt shackle 26 in the pin guide grooves 131 formed on its upper and lower parts.

[0078] Therefore, the indirect live-line crossarm extension arm 1 of the present invention can be connected to the single-integrated pole crossarm 21c via the single-integrated pole connection part 130. This connection allows the extension part 200 to protrude horizontally, thereby extending the length of the single-integrated pole crossarm 21c.

[0079] On the other hand, as mentioned above, when fastening and fixing the mounting means 300 when connecting the single internal column joint 130, it is possible to fasten and fix the cotter pin 26a to the fasteners 330 and 330' by operating the operating lever 340 with a live-line work stick, as mentioned above, through the expansion or folding operation of the fasteners 330 and 330'.

[0080] In this case, when extending using the single built-in pole joint 130 in the present invention, it is preferable to perform the extension work with the operating lever 340 facing downwards, as this allows for easy operation of the live-line work stick.

[0081] The following describes a method for ensuring a safe distance during indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, which has the configuration described above.

[0082] The method for ensuring a safe distance during indirect live-line work using the extension arm for indirect live-line crossarms of the present invention is implemented by performing indirect live-line work on one or more extra-high voltage distribution lines using the extension arm for indirect live-line crossarms.

[0083] Figure 14 is a flowchart showing the overall process of the safety distance securing method for indirect live-line work using the extension arm for indirect live-line work according to the present invention.

[0084] As shown in Figure 14, the method for ensuring a safe distance during indirect live-line work using the extension arm for indirect live-line crossarms of the present invention is used to perform indirect live-line work on one or more extra-high voltage distribution lines in the upper and lower circuits using the extension arm for indirect live-line crossarms. This method includes a work preparation step S110, a crossarm extension step S120, a work safety distance securing step S130, a wire restoration step S140, and a finishing step S150. By sequentially performing these steps, it is possible to ensure a safe distance during indirect live-line work on one or more extra-high voltage distribution lines in the upper and lower circuits.

[0085] First, the work preparation process S110 is performed.

[0086] When implementing the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, the necessary live-line work equipment will be carried to the power distribution line.

[0087] Referring to Figure 15, in the present invention, the worker moves to the power distribution line to be worked on using the live-line bucket 70 while carrying live-line work equipment such as a live-line extension arm 1 necessary for extending the crossarm, including a standard live-line work stick 80.

[0088] Subsequently, the arm extension process S120 is performed.

[0089] In implementing the method for ensuring a safe distance for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, the crossarms 20 of the power distribution line installed on the utility pole 10 are extended.

[0090] Referring to Figure 16, the live-line work stick 80 and other live-line work equipment can be used to indirectly connect the live-line extension arm 1 to one side of the crossarm 20 of the power distribution line. This extends the length of one side of the crossarm 20.

[0091] On the other hand, as shown in Figures 11 to 13, the crossarm 20 of the power distribution line to which the present invention is applied can, of course, be a pinned pole, an embedded pole, or a single-type embedded pole, depending on the type of pole.

[0092] Subsequently, the safety distance maintenance process S130 is carried out.

[0093] In implementing the method for ensuring a safe distance for indirect live-line work using the extension arm for indirect live-line work of the present invention, the safety distance for indirect live-line work on the power distribution line is ensured by relocating the power lines 30 of the power distribution line.

[0094] Referring to Figure 17, the electric wire 30 fixed to the crossarm 20 can be separated by indirect live-line work using a live-line work stick 80, and then moved and fixed to the live-line crossarm extension arm 1.

[0095] Therefore, as mentioned above, a safe distance necessary for indirect live-line work is ensured at the location of the existing power line 30 after it has been relocated.

[0096] Subsequently, the wire restoration process S140 is performed.

[0097] In implementing the safety distance securing method for indirect live-line work using the indirect live-line crossarm extension arm of the present invention, the power lines 30 of the distribution line that had been moved to the indirect live-line crossarm extension arm 1 are moved back to the original crossarm 20.

[0098] Referring to Figure 19, the electric wire 30 fixed to the indirect live-line crossarm extension arm 1 can be separated by indirect live-line work using the live-line work stick 80 and live-line work equipment, and then moved to and fixed to the crossarm 20.

[0099] After that, the finishing process S150 is performed.

[0100] When implementing the method for ensuring a safe distance for indirect live-line work using the extension arm for indirect live-line work of the present invention, as shown in Figure 20, once the electric wire 30 has returned to its original position as described above, the live-line work equipment such as the extension arm for indirect live-line work 1 can be removed using the live-line work stick 80 and live-line work equipment.

[0101] Therefore, according to the method for ensuring a safe distance for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, a safe distance for indirect live-line work can be secured in power distribution lines.

[0102] On the other hand, in the method for securing a safe distance for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, a safe distance for indirect live-line work for normal indirect live-line uninterrupted power distribution work is secured at the position of the power line 30 of the relocated distribution line through the work safety distance securing step S130. Referring to Figure 18, by securing this safe distance for indirect live-line work, it becomes possible to carry out various operations on the distribution line. As an example, various operations such as changing utility poles, replacing crossarms, replacing suspension insulators, replacing LP insulators, adjusting the separation, installing and removing LAs, installing new interceptor poles, replacing utility poles, installing and removing protective equipment, replacing jumper wires, replacing power lines, inspecting each line, and installing and removing switches can be carried out by indirect live-line work.

[0103] Furthermore, we will describe an indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance during indirect live-line work using the indirect live-line crossarm extension arm of the present invention having the configuration described above.

[0104] Figure 21 is a flowchart showing the overall process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention.

[0105] As shown in Figure 21, the indirect live-line uninterrupted power distribution method based on the indirect live-line work safety distance securing method using the indirect live-line crossarm extension arm of the present invention performs indirect live-line work on one or more extra-high voltage distribution lines using the indirect live-line crossarm extension arm, and this method includes: a work preparation step S210, a crossarm extension step S220, a work safety distance securing step S230, a main work step S240, a wire restoration step S250, and a finishing step S260.

[0106] First, the work preparation process S210 is performed.

[0107] When implementing the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, the necessary live-line work equipment will be carried to the power distribution line.

[0108] Referring to Figure 15, in the present invention, the worker moves to the power distribution line to be worked on using the live-line bucket 70 while carrying live-line work equipment such as a live-line extension arm 1 necessary for extending the crossarm, including a standard live-line work stick 80.

[0109] Subsequently, the arm extension process S220 is performed.

[0110] In implementing the indirect live-line uninterrupted power distribution method based on the indirect live-line work safety distance securing method using the extension arm for indirect live-line crossarms of the present invention, the crossarms 20 of the power distribution line installed on the utility pole 10 are extended.

[0111] Referring to Figure 16, the indirect live-line extension arm 1 can be attached to one side of the crossarm 20 of the power distribution line by performing indirect live-line work using the live-line work stick 80 and live-line work equipment. This extends the length of one side of the crossarm 20.

[0112] On the other hand, as shown in Figures 11 to 13, the crossarm 20 of the power distribution line to which the present invention is applied can of course be a pin-type crossarm, an integrated-type crossarm, or a single integrated-type crossarm, depending on the type of pole.

[0113] Subsequently, the safety distance maintenance process S230 is performed.

[0114] When implementing the indirect live-line uninterrupted power distribution method based on the method for ensuring a safe distance for indirect live-line work using the extension arm for indirect live-line work of the present invention, the power lines 30 of the distribution line are moved to ensure a safe distance for indirect live-line work on the distribution line.

[0115] Referring to Figure 17, the electric wire 30 fixed to the crossarm 20 can be separated by indirect live-line work using a live-line work stick 80, etc., and then moved to the live-line crossarm extension arm 1 and fixed therein.

[0116] Therefore, as described above, a safe distance for indirect live-line work is ensured at the location of the existing power line 30 that has been moved.

[0117] After that, the main work process S240 is performed.

[0118] In implementing the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, indirect live-line work is performed on the power distribution line.

[0119] Referring to Figure 18, in order to perform main work on one or more power distribution lines according to the present invention, the worker enters the line at a distance equal to the indirect live-line work safety distance secured using the live-line bucket 70, and then performs the main work on the power distribution line using live-line work equipment such as the live-line work stick 80.

[0120] Subsequently, the wire restoration process S250 is performed.

[0121] When implementing the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the indirect live-line crossarm extension arm of the present invention, once the main work is completed as described above, the power lines 30 of the distribution line that had been moved to the indirect live-line crossarm extension arm 1 should be moved back to the crossarm 20 to restore the original state.

[0122] Referring to Figure 19, the electric wire 30 fixed to the indirect live-line crossarm extension arm 1 can be separated by indirect live-line work using the live-line work stick 80 and live-line work equipment, and then moved to the crossarm 20 and fixed therein.

[0123] After that, the finishing process S260 is performed.

[0124] When implementing the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the indirect live-line crossarm extension arm of the present invention, as shown in Figure 20, once the power line 30 has been restored as described above, the live-line work equipment such as the indirect live-line crossarm extension arm 1 can be removed using the live-line work stick 80 and live-line work equipment.

[0125] Accordingly, in the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line work of the present invention, when working on one or more up and down distribution lines, a safety distance for indirect live-line work is secured on the distribution line, and the live-line bucket 70 enters while maintaining a distance equal to the secured safety distance. In this state, work can be performed by indirect live-line work.

[0126] Furthermore, the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the indirect live-line crossarm extension arm of the present invention is not limited to the work in the main work process S240, but is applicable to various tasks. For example, various tasks such as changing utility poles, replacing crossarms, replacing suspension insulators, replacing LP insulators, adjusting the separation, installing and removing LAs, installing new interceptor poles, replacing utility poles, installing and removing protective equipment, replacing jumper wires, replacing power lines, inspecting individual lines, installing and removing switches, etc., can be performed using indirect live-line work.

[0127] The following describes various embodiments of the work.

[0128] First, in the main work step S240 of the present invention, pole modification work can be performed to change the pin-type pole crossarm of the existing upper-level power distribution line to an internal pole crossarm.

[0129] At this time, the column replacement work is carried out as follows:

[0130] Referring to Figures 22 to 24, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0131] Subsequently, the wire 31 of the upper distribution line is separated from the LP insulator 52. When separating the wire 31 as described above, the wire 31 to be separated can be separated using a standard indirect live-line lift arm or the like.

[0132] Next, using live-line work equipment such as a standard live-line work stick, the pin-type pole crossarm 21a installed on the utility pole 10 can be removed by indirect live-line work, and a new built-in pole crossarm 21b can be installed in its place.

[0133] Subsequently, the separated electric wire 31 is installed on the internal pole bracket 21b. That is, with a standard tensioning machine (not shown) symmetrically installed on both sides of the installed internal pole bracket 21b, the electric wire 31 is gripped by the tensioning machine and fixed to the suspension insulator 51 provided on the internal pole bracket 21b.

[0134] Therefore, in the main work step S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and perform pole replacement work on the upper power distribution line.

[0135] Furthermore, the main work step S240 in the present invention can perform a crossarm replacement operation, which involves replacing an existing crossarm with a new one, when the existing upper power distribution line is a pin pole.

[0136] At this time, the crossarm replacement work is carried out as follows:

[0137] Referring to Figures 25 to 27, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0138] Subsequently, the power line wire 31 of the upper distribution line is separated from the LP insulator 52 and also separated from the existing crossarm 21. When separating the power line wire 31 as described above, the power line wire 31 to be separated can be separated using a standard indirect live-line lift arm or the like.

[0139] Next, using live-line work equipment such as a standard live-line work stick, the existing crossarm 21 installed on the utility pole 10 can be removed by indirect live-line work, and a new crossarm 21' can be installed in its place.

[0140] After that, the separated wire 31 is installed on the new crossarm 21', and then the wire is placed on the LP insulator 52 and secured.

[0141] Therefore, in the main work step S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and perform the crossarm replacement work on the upper power distribution line.

[0142] Furthermore, the main work step S240 in the present invention can also be used to perform suspension insulator replacement work, which involves replacing suspension insulators installed on existing upper power distribution lines.

[0143] At this time, the suspension insulator replacement work is carried out as follows:

[0144] Referring to Figures 28 to 31, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0145] Subsequently, a tensioning machine 60 is installed on the crossarm 21 of the upper distribution line. The tensioning machine 60 is installed symmetrically on both sides of the crossarm 21 along the longitudinal direction of the electric wire 31, and the electric wire 31 is gripped and fixed using the installed tensioning machine 60.

[0146] Subsequently, the suspension insulator 51 is removed, and the wire 31 is pulled using the tensioning machine 60 to release the tension applied to the suspension insulator 51 connecting the crossarm 21 and the wire 31, thereby returning it to a tension-free state.

[0147] Next, when replacing the suspension insulator 51, the existing suspension insulator 51 is removed by separating it from the crossarm 21 and the electric wire 31, and the new suspension insulator 51' is connected to its removal position.

[0148] After that, the tensioning machine 60 that is pulling the electric wire 31 is loosened to apply tension to the electric wire 31, and then the tensioning machine 60 can be separated from the crossarm 21 and the electric wire 31 and removed.

[0149] Therefore, in the main work step S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and perform the suspension insulator replacement work on the upper power distribution line.

[0150] Furthermore, the main work step S240 in the present invention can perform LP insulator replacement work, which involves replacing the LP insulators of existing upper-stage power distribution lines.

[0151] At this time, the LP insulator replacement work is carried out as follows.

[0152] Referring to Figures 32 to 34, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0153] Subsequently, the power line wire 31 of the upper distribution line is separated from the existing LP insulator 52. When separating the power line wire 31 as described above, the wire 31 to be separated can be separated using a standard indirect live-line lift arm or the like.

[0154] Next, using live-line work equipment such as a standard live-line work stick, the existing LP insulator 52 installed on the crossarm 21 can be separated and removed by indirect live-line work, and a new LP insulator 52' ​​can be installed in its place.

[0155] After that, the separated wire 31 can be installed on the new LP insulator 52'. Then, the wire 31 can be placed on the new LP insulator 52' ​​and secured.

[0156] Therefore, in the main work step S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and perform LP insulator replacement work on the upper power distribution line.

[0157] Furthermore, the main work step S240 in the present invention can perform a separation adjustment operation to adjust the separation of the wires in an existing upper power distribution line.

[0158] At this time, the adjustment of the degree of deviation is performed as follows.

[0159] Referring to Figures 35 to 38, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0160] After that, tensioners 60 can be installed on both sides of the crossarm 21 of the upper distribution line, and the wires 31 on both sides can be gripped and fixed using the tensioners 60.

[0161] Next, the tensioning machine 60 is operated to pull and loosen the wires, thereby adjusting the appropriate separation of the wires 31.

[0162] Next, the dead end clamp 31a of the electric wire 31 is detached, and the detached dead end clamp 31a is reattached to the position of the electric wire 31 where the separation angle has been adjusted, and the wire is reconnected.

[0163] Finally, the tensioning machine 60 that is pulling the electric wire 31 is loosened so that the correct tension is applied to the electric wire 31 whose separation angle has been adjusted, and then the tensioning machine 60 is separated from the crossarm 21 and the electric wire 31 and removed.

[0164] Therefore, in the main work process S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and safely and reliably perform the separation adjustment work on the upper power distribution line.

[0165] Furthermore, the main work step S240 in the present invention can be used to perform the installation work of a new lightning arrester (LA) on an existing upper power distribution line.

[0166] At this time, the LA installation work is carried out as follows:

[0167] Referring to Figures 39 and 40, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0168] Subsequently, an LA53 (lightning arrester) is installed on the crossarm 21 of the upper power distribution line. At this time, the LA53 to be installed can be lowered from above using the winch of the live-line bucket 70, and attached to the crossarm 21 by indirect live-line work using a live-line work stick 80, etc.

[0169] Next, the grounding wire 53a of the installed LA53 is connected to the utility pole grounding wire 53c, and the grounding wire 53a extending from the LA53 is connected to the grounding terminal of the utility pole grounding wire 53c provided on the utility pole 10.

[0170] Furthermore, the primary lead wire 53b of the installed LA53 is connected, insulation treatment (coating treatment) is performed on the point where the primary lead wire 53b is connected to the electric wire 31, and the primary lead wire 53b is then compressed and connected at the position after the treatment.

[0171] Therefore, in the main work process S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and reliably perform the LA installation work on the upper power distribution line using indirect live-line work.

[0172] Furthermore, the main work step S240 in the present invention can perform LA removal work, which involves removing existing LAs (lightning arresters) installed on existing upper power distribution lines.

[0173] At this time, the LA removal work will be carried out as follows:

[0174] Referring to Figures 41 and 42, the live-line bucket 70 is used to enter the upper power distribution line while ensuring a safe distance for indirect live-line work on the lower power distribution line.

[0175] After that, the primary lead wire 53b, which connects the existing LA53 and the power line 31 already installed on the crossarm 21 of the upper distribution line, can be separated by cutting it using a cutting tool such as a live-line work stick 80.

[0176] Next, the grounding wire 53a, which is connected to the existing LA53 utility pole grounding wire 53c already installed on the crossarm 21 of the upper distribution line, can be separated by cutting it using a live-line work stick 80 or the like.

[0177] Furthermore, the existing LA53 already installed on the crossarm 21 of the upper power distribution line is removed. At this time, the bolts and nuts fixed to the crossarm 21 are loosened, and the fixing force of the bracket (not shown) to which the existing LA53 is attached is released. Then, the LA53 is lifted up from above using the winch of the live-line bucket 70 or the like and removed.

[0178] Therefore, in the main work step S240 of the present invention, as described above, with a safe distance for indirect live-line work on the lower power distribution line secured, the worker can safely enter the upper power distribution line and perform the removal of the existing LA on the upper power distribution line as indirect live-line work.

[0179] Furthermore, the main work step S240 in the present invention can perform the installation of a new intervening pole by installing an intervening pole between existing utility poles and installing one or more existing power distribution lines.

[0180] At this time, the installation of the new column is carried out as follows.

[0181] Referring to Figures 43 to 45, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0182] Subsequently, the power lines 31 and overhead ground wire 32 of the upper distribution line are separated, and the power lines 31 and overhead ground wire 32 are lifted upwards using a standard indirect live-line lift arm or the like and moved to a safe position.

[0183] Next, just like in a normal utility pole installation project, a new intervening pole 11 should be installed between the existing utility poles 10.

[0184] Furthermore, the power lines 31 and overhead ground wires 32 that were raised above can be placed on the pole and overhead ground wire support base and installed on the newly installed splice pole 11.

[0185] Therefore, in the main work process S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and perform the installation of new splice poles for one or more power distribution lines by indirect live-line work.

[0186] Furthermore, the main work step S240 in the present invention can perform utility pole replacement work, which involves replacing utility poles for one or more existing power distribution lines.

[0187] At this time, the utility pole replacement work is carried out as follows:

[0188] Referring to Figures 46 to 49, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0189] Afterward, the electric wire 30 can be moved to a safe location using a standard indirect live-line lift arm or similar device.

[0190] Next, the existing utility pole 10, from which the power lines 30 and 31 are separated, is removed, and a new utility pole 10' is installed in the same manner as in a normal utility pole installation project.

[0191] Furthermore, the lower power distribution line wires 30 and the upper power distribution line wires 31 and overhead ground wire 32 that were raised above the newly installed utility pole 10' can be placed on top of it, and then the existing utility pole 10 that was removed can be removed.

[0192] Therefore, in the main work step S240 of the present invention, as described above, a safe distance for indirect live-line work on the lower power distribution line is secured, allowing workers to safely enter and perform utility pole replacement work on one or more power distribution lines.

[0193] Furthermore, the main work step S240 in the present invention allows for the installation of protective equipment, including protective pipes and protective insulating covers, on existing upper power distribution lines.

[0194] At this time, the protective equipment installation work is carried out as follows:

[0195] Referring to Figures 50 to 52, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0196] After that, either a standard protective device inserter 55a is installed, or a tip tool is attached to the live wire stick, and in the embodiment of the present invention, a standard protective device inserter 55a is attached to the electric wire 31 to be protected.

[0197] Next, one end of the protective device 55 is connected to the protective device inserter 55a, and the protective device inserter 55a is operated to install the protective device 55 so that it encloses the electric wire 31 from the tip of the protective device 55.

[0198] Furthermore, during the process of installing the protective device 55, a standard protective insulating cover 55' can also be installed on the LP insulator installed on the crossarm 21 by indirect live-line work using a live-line work stick or the like.

[0199] After the protective equipment 55 has been installed, the installed protective equipment inserter 55a can be removed.

[0200] Therefore, in the main work step S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and perform the installation of protective equipment on the upper power distribution line.

[0201] Furthermore, the main work step S240 in the present invention can perform the removal of protective equipment, including protective pipes and protective insulating covers, installed on existing upper power distribution lines.

[0202] At this time, the removal of protective equipment is carried out as follows:

[0203] Next, as shown in Figures 53 to 54, the worker enters the upper power distribution line using the live-line bucket 70, while ensuring a safe distance for indirect live-line work on the lower power distribution line.

[0204] Afterward, the protective equipment 55 and protective insulating cover 55' can be removed using a standard live-line work stick 80 or similar tool.

[0205] Therefore, in the main work process S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and perform the removal of protective equipment on the upper power distribution line.

[0206] Furthermore, the main work step S240 in the present invention can perform jumper wire replacement work, which involves replacing the jumper wires of existing upper-level power distribution lines.

[0207] At this time, the jumper wire replacement work is carried out as follows:

[0208] As shown in Figures 55 to 57, first, the worker enters the upper power distribution line using a live-line bucket 70, while ensuring a safe distance for indirect live-line work on the lower power distribution line.

[0209] After that, a bypass jumper cable 56a is installed, and the power lines 31 on both sides of the upper distribution line are bypassed using the bypass jumper cable 56a, with the utility pole 10 as the central point.

[0210] Next, the existing jumper wire 56 that connected the two power lines 31 on both sides should be separated and removed.

[0211] Furthermore, a new jumper wire 56' can be connected and installed in the location where the existing jumper wire 56 was removed, and after the work is completed, the bypass jumper cable 56a can be separated and removed.

[0212] Therefore, in the main work process S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and safely and reliably perform the jumper wire replacement work on the upper power distribution line.

[0213] Furthermore, the main work step S240 in the present invention can perform wire replacement work to replace the wires of existing upper-level power distribution lines.

[0214] At this time, the wire replacement work is carried out as follows:

[0215] Next, as shown in Figures 58 and 59, the worker enters the upper power distribution line using the live-line bucket 70 while ensuring a safe distance for indirect live-line work on the lower power distribution line.

[0216] After that, the old wire 31 can be separated from the LP insulator 52 or suspension insulator of the upper distribution line. In the embodiment of the present invention, the description will be given with the wire separated from the LP insulator 52.

[0217] Afterward, the separated old power lines can be moved to a safe place and then separated using a standard indirect live-line lift arm or similar device.

[0218] After that, the new wire 31' can be installed at the location where the old wire 31 was separated. Then, although not shown in the diagram, the new wire 31' can be fixed to the LP insulator 52 using normal connection and tensioning procedures.

[0219] Therefore, in the main work process S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and safely and reliably perform the wire replacement work on the upper power distribution line.

[0220] Furthermore, the main work process S240 in the present invention can perform line-by-line inspection work to inspect existing upper-level power distribution lines.

[0221] At this time, the track-by-track inspection work is carried out as follows:

[0222] Referring to Figure 60, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0223] Subsequently, a line-by-line inspection is conducted on the upper distribution lines. At this time, the inspection of the lines is not limited to this, and various inspections of the upper distribution lines may be conducted, such as the condition of the poles, the condition of various insulators, the separation of the power lines, the condition of the LA, the condition of the COS, the condition of the jumper wires, etc.

[0224] Therefore, in the main work step S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and perform line-by-line inspection work on the upper power distribution line.

[0225] Furthermore, the main work process S240 in the present invention can be used to install switches on existing upper power distribution lines.

[0226] At this time, the switch installation work is carried out as follows:

[0227] Referring to Figures 61 to 63, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0228] After that, a bypass jumper cable 56a is installed, and the power lines 31 on both sides of the upper distribution line are bypassed using the bypass jumper cable 56a, with the utility pole 10 as the central point.

[0229] After that, the existing jumper wire 56 connecting the two electric wires 31 can be disconnected, the switch 58 can be installed, and then the switch cable 58a can be used to connect to the two electric wires 31 on each side.

[0230] After that, the installed switch 58 is turned on, and the bypass jumper cable 56a is disconnected and removed.

[0231] Therefore, in the main work step S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and perform the switch installation work on the upper power distribution line.

[0232] Furthermore, the main work process S240 in the present invention can be used to remove switches from existing upper power distribution lines.

[0233] At this time, the removal of the switchgear is carried out as follows:

[0234] Referring to Figures 64 to 66, first, with a safe distance secured for indirect live-line work on the lower power distribution line, the live-line bucket 70 is used to enter the upper power distribution line.

[0235] After that, the power lines 31 on both sides of the utility pole 10 can be connected using bypass jumper cables 56a.

[0236] After that, the switch 58 can be shut off and the device removed from the utility pole 10.

[0237] After that, the two wires 31 on both sides are connected with a new jumper wire 56', and the bypass jumper cable 56a is separated from the two wires 31 on both sides and removed.

[0238] Therefore, in the main work step S240 of the present invention, as described above, with a safe distance secured for indirect live-line work on the lower power distribution line, the worker can safely enter the upper power distribution line and perform the switch removal work on the upper power distribution line.

[0239] On the other hand, although not shown in the figures, when implementing the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, the crossarms 21 provided on the upper and lower power distribution lines can be of various types, such as ordinary single crossarms, double crossarms, and single built-in pole crossarms, depending on the configuration in which the crossarms 21 are installed on the utility pole 10.

[0240] Furthermore, referring to Figure 67, the crossarm 21 can be applied to various pole configurations such as ordinary poles (a), cantilevered poles (b), and protruding poles (c), depending on the position where it is installed on the utility pole, and can be applied to ordinary pinned poles, anchored poles, or built-in poles depending on the type of pole.

[0241] As described above, the indirect live-line uninterrupted power distribution method based on the indirect live-line work safety distance securing method using the indirect live-line crossarm extension arm of the present invention enables indirect live-line work while securing a safety distance for indirect live-line work with respect to the distribution line when working on one or more distribution lines above and below, and in particular enables simpler and faster indirect live-line work, while also ensuring the safety of workers. [Industrial applicability]

[0242] The extension arm for indirect live-line crossarms of the present invention, the method for ensuring a safe distance for indirect live-line work using the same, and the indirect live-line uninterrupted power distribution method based on the method for ensuring a safe distance for indirect live-line work have the effect of enabling safe indirect live-line work on power distribution lines by ensuring a safe distance for indirect live-line work through the extension of the crossarms, and by entering one or more power distribution lines and their upper distribution lines with a safe distance for indirect live-line work ensured through the extension of the crossarms and the movement of the power lines for one or more power distribution lines above and below, and safely carrying out indirect live-line work such as changing utility poles, replacing crossarms, replacing suspension insulators, replacing LP insulators, adjusting the separation, installing and removing LAs, installing new interceptor poles, replacing utility poles, installing and removing protective equipment, replacing jumper wires, replacing power lines, inspecting each line, and installing and removing switches. [Brief explanation of the drawing]

[0243] [Figure 1] This is a perspective view of a first embodiment of the indirect live-line crossarm extension arm of the present invention. [Figure 2] This is a cross-sectional view of a first embodiment of the indirect live-line crossarm extension arm of the present invention. [Figure 3] This is a perspective view of a second embodiment of the indirect live-line crossarm extension arm of the present invention. [Figure 4] This is a cross-sectional view of a second embodiment of the indirect live-line crossarm extension arm of the present invention. [Figure 5] This is a perspective view of a third embodiment of the indirect live-line crossarm extension arm of the present invention. [Figure 6] This is a cross-sectional view of a third embodiment of the indirect live-line crossarm extension arm of the present invention. [Figure 7] This is a perspective view of the main coupling of the mounting means for the extension arm of the indirect live-line crossarm according to the present invention. [Figure 8] This is an exploded perspective view of the main part of the mounting means for the extension arm of the indirect live-line crossarm according to the present invention. [Figure 9] This is a cross-sectional view of the main part of the extension arm for indirect live-line crossarms of the present invention. [Figure 10] This figure shows the operating state of the mounting means for the indirect live-line crossarm extension arm of the present invention. [Figure 11] This is a diagram showing the usage state of the indirect live-line crossarm extension arm according to the present invention, according to the first embodiment. [Figure 12] This is a diagram showing the usage state of the indirect live-line crossarm extension arm according to the present invention, as per a second embodiment. [Figure 13] This is a diagram showing the usage state of the third embodiment of the indirect live-line crossarm extension arm of the present invention. [Figure 14] This flowchart shows the overall process of the safety distance securing method for indirect live-line work using the extension arm for indirect live-line work according to the present invention. [Figure 15] This is a schematic diagram showing the overall process of a safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, or an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 16] This is a schematic diagram showing the overall process of a safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, or an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 17] This is a schematic diagram showing the overall process of a safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, or an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 18] This is a schematic diagram showing the overall process of a safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, or an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 19] This is a schematic diagram showing the overall process of a safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, or an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 20] This is a schematic diagram showing the overall process of a safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, or an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 21] This flowchart shows the overall process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 22] This figure shows an embodiment of the pole replacement work for the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 23] This figure shows an embodiment of the pole replacement work for the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 24] This figure shows an embodiment of the pole replacement work for the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 25] This figure shows an embodiment of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, specifically for the replacement of pin-pole crossarms on upper power distribution lines during the main work process. [Figure 26] This figure shows an embodiment of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, specifically for the replacement of pin-pole crossarms on upper power distribution lines during the main work process. [Figure 27]This figure shows an embodiment of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, specifically for the replacement of pin-pole crossarms on upper power distribution lines during the main work process. [Figure 28] This figure shows an embodiment of the indirect live-line uninterrupted power distribution method, based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, for the replacement of suspension insulators on the upper power distribution line during the main work process. [Figure 29] This figure shows an embodiment of the indirect live-line uninterrupted power distribution method, based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, for the replacement of suspension insulators on the upper power distribution line during the main work process. [Figure 30] This figure shows an embodiment of the indirect live-line uninterrupted power distribution method, based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, for the replacement of suspension insulators on the upper power distribution line during the main work process. [Figure 31] This figure shows an embodiment of the indirect live-line uninterrupted power distribution method, based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, for the replacement of suspension insulators on the upper power distribution line during the main work process. [Figure 32] This figure shows an embodiment of the LP insulator replacement work on the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 33] This figure shows an embodiment of the LP insulator replacement work on the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 34] This figure shows an embodiment of the LP insulator replacement work on the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 35]This figure shows an embodiment of the operation for adjusting the separation of the upper distribution line during the main work process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 36] This figure shows an embodiment of the operation for adjusting the separation of the upper distribution line during the main work process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 37] This figure shows an embodiment of the operation for adjusting the separation of the upper distribution line during the main work process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 38] This figure shows an embodiment of the operation for adjusting the separation of the upper distribution line during the main work process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 39] This figure shows an embodiment of the LA installation work for the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 40] This figure shows an embodiment of the LA installation work for the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 41] This figure shows an embodiment of the LA removal work of the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 42] This figure shows an embodiment of the LA removal work of the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 43]This figure shows an embodiment of the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, for the installation of new poles for one or more power distribution lines during the main work process. [Figure 44] This figure shows an embodiment of the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, for the installation of new poles for one or more power distribution lines during the main work process. [Figure 45] This figure shows an embodiment of the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention, for the installation of new poles for one or more power distribution lines during the main work process. [Figure 46] This figure shows an embodiment for the replacement of utility poles for one or more distribution lines, during the main work process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 47] This figure shows an embodiment for the replacement of utility poles for one or more distribution lines, during the main work process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 48] This figure shows an embodiment for the replacement of utility poles for one or more distribution lines, during the main work process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 49] This figure shows an embodiment for the replacement of utility poles for one or more distribution lines, during the main work process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 50] This figure shows an embodiment of the installation of protective equipment on the upper power distribution line during the main work process of an indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 51]This figure shows an embodiment of the installation of protective equipment on the upper power distribution line during the main work process of an indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 52] This figure shows an embodiment of the installation of protective equipment on the upper power distribution line during the main work process of an indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 53] This figure shows an embodiment of the removal of protective equipment on the upper power distribution line during the main work process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 54] This figure shows an embodiment of the removal of protective equipment on the upper power distribution line during the main work process of an indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 55] This figure shows an embodiment of the jumper wire replacement work on the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 56] This figure shows an embodiment of the jumper wire replacement work on the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 57] This figure shows an embodiment of the jumper wire replacement work on the upper distribution line during the main work process of the indirect live-line uninterrupted power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 58] This figure shows an embodiment of the wire replacement work on an upper distribution line during the main work process of an indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the extension arm for indirect live-line crossarms of the present invention. [Figure 59]This is a diagram showing an embodiment for wire replacement work on the upper distribution line, during the main work steps of the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the crossarm extension arm for indirect live-line work of the present invention. [Figure 60] This is a diagram showing an embodiment for line-specific inspection work, during the main work steps of the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the crossarm extension arm for indirect live-line work of the present invention. [Figure 61] This is a diagram showing an embodiment for switch installation work on the upper distribution line, during the main work steps of the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the crossarm extension arm for indirect live-line work of the present invention. [Figure 62] This is a diagram showing an embodiment for switch installation work on the upper distribution line, during the main work steps of the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the crossarm extension arm for indirect live-line work of the present invention. [Figure 63] This is a diagram showing an embodiment for switch installation work on the upper distribution line, during the main work steps of the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the crossarm extension arm for indirect live-line work of the present invention. [Figure 64] This is a diagram showing an embodiment for switch removal work on the upper distribution line, during the main work steps of the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the crossarm extension arm for indirect live-line work of the present invention. [Figure 65] This is a diagram showing an embodiment for switch removal work on the upper distribution line, during the main work steps of the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the crossarm extension arm for indirect live-line work of the present invention. [Figure 66] This is a diagram showing an embodiment for switch removal work on the upper distribution line, during the main work steps of the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the crossarm extension arm for indirect live-line work of the present invention. [Figure 67] This is a schematic diagram showing the pole configuration in the indirect live-line uninterruptible power distribution method based on the safety distance securing method for indirect live-line work using the crossarm extension arm for indirect live-line work of the present invention.

Description of Symbols

[0244] 10: Electric pole, 10': New electric pole 11: Interruption pole 20: Crossarm, 21: Crossarm 21': New crossarm, 21a: Crossarm for pin pole 21b: Crossarm for built-in pole, 21c: Crossarm for single built-in pole 25: Fixing pin, 26: Bolt shackle 26a: Cotter pin, 27: M bolt 30: Electric wire, 31: Electric wire 31a: Dead end clamp, 32: Overhead ground wire 40: Insulating auxiliary arm for indirect live line work, 51: Suspension insulator 51': New suspension insulator, 52: LP insulator 52': New LP insulator, 53: LA 53a: Ground wire, 53b: Primary side lead wire 53c: Electric pole ground wire 55: Protective equipment, 55a: Protective equipment inserter 56: Jumper wire, 56a: Bypass jumper cable 56': New jumper wire, 58: Switch 58a: Switch cable, 60: Wire tensioner 70: Live line bucket, 80: Stick for live line work 100: Coupling portion, 110: Coupling portion for pin pole 111: Crossarm insertion space, 112: Crossarm guide groove 113: Fixing pin guide groove, 114: Pin hooking portion 115: Work hole, 116: Mounting means housing 117: Fixing pin guide groove, 118: Lever through long hole 120: Coupling portion for built-in pole, 121: Crossarm insertion space 122: Pin guide groove, 123: Bolt guide groove 125: Mounting means housing, 126: Bolt guide groove 127: Lever through long hole, 128: Inclined reinforcing portion 130: Coupling portion for single built-in pole, 131: Pin guide groove 132: Lever through-hole 200: Extension part, 210: Mounting hole 300: Mounting means, 310: Support plate 311: Spacer, 312: Guide pin 313: Spring support pin, 314: Lever guide hole 320: Actuation plate, 321: Locking extension part 322: Spring guide groove, 323: Spring 324: Guide pin guide groove, 330, 330': Fasteners 331: Shaft, 332: Open spring 333: Pin fixing groove, 334: Locking groove 340: Operating lever S110: Work preparation process, S120: Arm extension process S130: Work safety distance securing process, S140: Wire restoration process S150: Finishing process S210: Work preparation process, S220: Arm extension process S230: Work safety distance securing process, S240: Main work process S250: Wire restoration process, S260: Finishing process

Claims

1. A tubular connector 100 with one end open forward and connected to the end of the crossarm of a utility pole; An extension portion 200 is formed by extending from the rear end of the connecting portion 100 and has a plurality of mounting holes 210; and The connection portion 100 includes mounting means 300 that are provided on the connection portion 100 and apply fixing force to fasten the connection portion 100 to the arm, The mounting means 300 is: A plate-shaped support plate 310 that extends in the longitudinal direction from front to back and includes a plurality of spacers 311 formed on all four sides in the middle section, a guide pin 312 formed in the center of the rear end, a spring support pin 313 formed in the middle section, and a horizontally elongated lever guide hole 314 formed on the rear side of the spring support pin 313; An operating plate 320 is housed between the spacers 311 so as to slide back and forth, and includes a locking extension 321 formed at its tip, a horizontal elongated spring guide groove 322 formed through the front middle portion into which the spring support pin 313 is inserted, a spring 323 elastically provided on the spring support pin 313 to impart forward movement force, and a guide pin guide groove 324 formed at the rear end into which the guide pin 312 is housed and guided; A pair of fasteners 330, 330', which are connected on both sides in the width direction at the front end of the support plate 310, and whose rear ends are pivotably provided around the axis 331 of the support plate 310, and whose front ends expand by the elastic force of an elastically provided release spring 332, and which include a pin fixing groove 333 defined by opposing central inner surfaces and a locking groove 334 defined by opposing rear inner surfaces and having a rearward expanding step into which the locking extension portion 321 of the operating plate 320 engages; and An indirect live-line extension arm for a crossarm, characterized by including an operating lever 340 that passes through a lever guide hole 314 of the support plate 310 and is connected to the operating plate 320, and which applies a backward movement force to the operating plate 320 from the outside by indirect live-line work using a live-line work stick.

2. The joint 100 is: A pin pole connector 110 configured to be applicable to the crossarms for pin poles of power distribution lines; A bracket insertion space 111 is formed inside, open to the front, to allow insertion of a pin-post bracket; A notch is formed to open forward, and a bracket guide groove 112 is formed on the upper surface to guide the insertion of the bracket; A pair of fixing pin guide grooves 113 are formed in the middle of both sides so as to open forward; A pin-hanging portion 114 whose upper part protrudes forward and slopes downward, centered on the aforementioned fixing pin guide groove 113; A work hole 115 formed on the bottom surface so as to communicate with the arm insertion space 111; and The mounting means housing 116 is open to the front so that the mounting means 300 can be mounted, and includes a fixing pin guide groove 117 formed at the tip of one side corresponding to the fixing pin guide groove 113, and a lever through elongated hole 118 formed in the middle corresponding to the lever guide hole 314. The mounting means 300 is configured as follows: The indirect live-line crossarm extension arm according to claim 1, characterized in that the support plate 310 is fixed inside the mounting means housing 116 such that the fasteners 330, 330' are positioned forward when installed, the release spring 332 is elastically provided inside the mounting means housing 116, and the operating lever 340 is fixed to the operating plate 320 by passing through the lever through-hole 118 and the lever guide hole 314 when installed.

3. The joint 100 is: An internal pole connector 120 configured to be applicable to the internal pole crossarm of a power distribution line; A bracket insertion space 121 is formed inside, open to the front, to allow the insertion of a bracket for an internal column; Pin guide grooves 122 are formed on the upper and lower surfaces, with notches that open forward; A pair of bolt guide grooves 123 are formed in the middle of the front ends of both sides so as to open forward; Mounting means housing 125 having one side open forward so that the mounting means 300 can be mounted, and including a bolt guide groove 126 formed at the tip corresponding to the bolt guide groove 123, and a lever through-hole 127 formed in the middle corresponding to the lever guide hole 314; and It includes an inclined reinforcing portion 128 that is formed to protrude from the other side so as to pass between the bolt shackles and be inserted and installed, The mounting means 300 is configured as follows: The indirect live-line crossarm extension arm according to claim 1, characterized in that the support plate 310 is fixed inside the mounting means housing 125 such that the fasteners 330, 330' are positioned forward when installed, the release spring 332 is elastically provided inside the mounting means housing 125, and the operating lever 340 is fixed to the operating plate 320 by passing through the lever through-hole 127 and the lever guide hole 314 when installed.

4. The aforementioned joint 100 is: A single-integrated pole connector 130 configured to be applicable to a single-integrated pole crossarm for a power distribution line; The single-integrated column connecting portion 130 is configured to have a diameter smaller than the diameter of the single-integrated column bracket so that it can be inserted into the single-integrated column bracket. A pin guide groove 131 formed on the upper and lower surfaces, notched to open forward; and Behind the pin guide groove 131, a lever through-hole 132 is formed on the upper surface corresponding to the lever guide hole 314, The mounting means 300 is configured as follows: The indirect live-line crossarm extension arm according to claim 1, characterized in that the support plate 310 is fixed to the upper inner part of the single built-in column coupling portion 130 such that the fasteners 330, 330' are positioned forward when installed, the release spring 332 is elastically provided inside the coupling portion 100, and the operating lever 340 is fixed to the operating plate 320 by passing through the lever through-elongated hole 132 and the lever guide hole 314 when installed.

5. In a method for ensuring a safe distance for indirect live-line work using an indirect live-line crossarm extension arm, which is used to perform indirect live-line work on one or more extra-high voltage distribution lines vertically using an indirect live-line crossarm extension arm as described in any one of claims 1 to 4, this method is: Preparation step S110 involves carrying live-line work equipment, including a live-line work stick and an indirect live-line crossarm extension arm for extending the crossarm, and moving to the power distribution line using a live-line bucket; A crossarm extension process S120 involves extending a crossarm by connecting an indirect live-line crossarm extension arm to one or both sides of a crossarm on a power distribution line using a live-line work stick and live-line work equipment through indirect live-line work; Work safety distance securing process S130: Relocating the power lines of the distribution line to the extension arm for indirect live-line crossarms to secure a safe distance for indirect live-line work; The wire restoration process S140 involves restoring the wires of the distribution line, which had been moved to the extension arm for indirect live lines, by moving the crossarm back to their original position; and A construction method characterized by including a finishing step S150 in which live-line work equipment such as an extension arm for an indirect live-line crossarm is removed using a live-line work stick and live-line work equipment.

6. An indirect live-line uninterruptible power distribution method based on a method for ensuring a safe distance for indirect live-line work using an indirect live-line extension arm, which is used to perform indirect live-line work on one or more extra-high voltage distribution lines vertically using an indirect live-line extension arm as described in any one of claims 1 to 4, wherein this method is: Preparation step S210 involves carrying live-line work equipment, including a live-line work stick and an indirect live-line crossarm extension arm for extending the crossarm, and moving to the power distribution line using a live-line bucket; A crossarm extension process S220 involves extending a crossarm by connecting an indirect live-line crossarm extension arm to one or both sides of a crossarm on a power distribution line using a live-line work stick and live-line work equipment through indirect live-line work; Work safety distance securing process S230: Relocating the power lines of the distribution line to the extension arm for indirect live-line crossarms to secure a safe distance for indirect live-line work; Main work process S240: When a safe distance for indirect live-line work on a power distribution line is ensured, the worker performs indirect live-line work on the power distribution line using a live-line bucket; The wire restoration process S250 involves restoring the wires of the power distribution line, which had been moved to the extension arm for the indirect live-line crossarm, to the crossarm after the indirect live-line work on the power distribution line has been completed; and A construction method characterized by including a finishing step S260 in which live-line work equipment such as an extension arm for an indirect live-line crossarm is removed using a live-line work stick and live-line work equipment.

7. The main work process S240 involves changing the pin-type crossarms of the existing upper-level power distribution lines to built-in crossarms. The aforementioned column replacement work is carried out as follows: With a safe distance ensured for indirect live-line work on the lower power distribution line, a live-line bucket is used to enter the upper power distribution line, and the wires are separated from the LP insulators of the upper power distribution line. Remove the existing pin-type bracket and install a new built-in bracket. Tensioners are installed on both sides of the installed internal pole bracket, the electric wire is brought close to the tensioners, and both sides are gripped and fixed with the tensioners. An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms as described in 6, characterized in that the tensioning machine is removed after being connected and fixed to the suspension insulator.

8. The aforementioned main work process S240 involves replacing the existing crossarms of the upper power distribution line with new crossarms. The aforementioned bracket replacement work is carried out as follows: With a safe distance ensured for indirect live-line work on the lower power distribution line, a live-line bucket is used to enter the upper power distribution line, and the power lines of the upper power distribution line are separated from the existing crossarms. Remove the existing bracket and install a new one. An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms as described in 6, characterized in that the electric wire is placed on the newly installed crossarm and fixed in place.

9. The main work process S240 involves performing suspension insulator replacement work to replace the suspension insulators of the existing upper distribution line. The suspension insulator replacement procedure is carried out as follows: With a safe distance ensured for indirect live-line work on the lower power distribution line, a live-line bucket is used to enter the upper power distribution line, a tensioning machine is installed on the crossarm of the upper power distribution line, and the wire is gripped and secured using the tensioning machine. The tensioning machine that has been installed is pulled to release tension from the suspension insulator. In the aforementioned tension-free state, the existing suspension insulator is removed from the crossarm, and a new suspension insulator is installed in the position where it was removed. An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms according to claim 6, characterized in that the tensioning machine is loosened to release the tension applied to the electric wire, and then the tensioning machine is removed.

10. The main work process S240 involves performing LP insulator replacement work to replace the LP insulators of the existing upper distribution line. The LP insulator replacement procedure is carried out as follows: With a safe distance ensured for indirect live-line work on the lower distribution line, a live-line bucket is used to enter the upper distribution line and separate the wires fixed to the LP insulators of the upper distribution line. The existing LP insulators fixed to the crossarms were separated from the crossarms and removed. Install new LP insulators in the location where the existing LP insulators were removed. An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms according to claim 6, characterized in that an electric wire is placed on top of the new LP insulator and fixed.

11. The aforementioned main work process S240 involves performing a separation adjustment operation to adjust the separation of the wires in the existing upper distribution line. The aforementioned adjustment of the degree of deviation is performed as follows: With a safe distance ensured for indirect live-line work on the lower power distribution line, a live-line bucket is used to enter the upper power distribution line, a tensioning machine is installed on the crossarm of the upper power distribution line, and the wire is gripped and secured using the tensioning machine. By operating the tensioning machine to pull or loosen the fixed electric wire, the degree of separation is adjusted. The dead end clamp of the wire whose separation angle has been adjusted is detached, reinstalled in the position where the separation angle has been adjusted, and the wire whose separation angle has been adjusted is connected and fixed. An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms according to claim 6, characterized in that the tensioning machine is loosened to release the tension applied to the electric wire, and then the tensioning machine is removed.

12. The main work process S240 involves performing LA (lightning arrester) installation work, which involves installing LA on the existing upper power distribution line. The LA installation work described above is carried out as follows: With a safe distance secured for indirect live-line work on the lower distribution line, enter the upper distribution line using a live-line bucket and install the LA on the upper distribution line. The grounding wire of the installed LA is connected to the utility pole grounding wire. An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms according to claim 6, characterized in that the installed LA and the electric wire are connected by a primary-side lead wire.

13. The aforementioned main work process S240 involves removing existing lightning arresters (LAs) installed on existing upper power distribution lines, The aforementioned LA removal work will be carried out as follows: With a safe distance ensured for indirect live-line work on the lower distribution line, a live-line bucket is used to enter the upper distribution line, and the primary lead wire of the existing LA installed on the upper distribution line is separated. The existing grounding wire of the existing LA that connects the existing LA to the electric wire is separated, An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for an indirect live-line crossarm according to claim 6, characterized in that the fixing force of the existing LA is released from the crossarm and then separated from the crossarm.

14. The main work process S240 involves installing a new splice pole between existing utility poles and installing one or more existing power distribution lines. The aforementioned installation of the new pole is carried out as follows: With a safe distance ensured for indirect live-line work on the lower distribution line, a live-line bucket is used to enter the upper distribution line, and the power lines and overhead ground wires of the upper distribution line are separated and moved to a safe location. A new pole will be installed between the existing utility poles. Install the overhead ground wire support base and the pole on the newly constructed interposed pole. An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms according to claim 6, characterized in that the power lines are placed on the poles and overhead ground wire support bases of the newly installed intercepted poles.

15. The aforementioned main work process S240 involves replacing utility poles for one or more existing power distribution lines, The aforementioned utility pole replacement work is carried out as follows: With a safe distance ensured for indirect live-line work on the lower distribution line, a live-line bucket is used to enter the upper distribution line, and the power lines and overhead ground wires of the upper distribution line are separated and moved to a safe location. Install a new utility pole, The upper wires are connected and secured to the new utility pole by installing crossarms. The power lines of the lower distribution line are separated and moved to a safe location on the new utility pole. An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms according to claim 6, characterized in that after removing an existing utility pole, the power lines are connected and fixed to the new utility pole.

16. The aforementioned main work process S240 involves installing protective equipment on the existing upper power distribution line, The protective equipment installation work is carried out as follows: With a safe distance secured for indirect live-line work on the lower power distribution line, enter the upper power distribution line using a live-line bucket, install a protective equipment work mechanism on the upper power distribution line, or attach a tip tool to a live-line work stick, The protective equipment is installed so as to be covered with electric wires via the protective equipment work mechanism or the tip tool that has been installed, An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms according to claim 6, characterized in that the protective equipment work mechanism or the tip tool used is removed.

17. The aforementioned main work process S240 involves removing protective equipment installed on the existing upper power distribution line, The removal of the protective equipment is carried out as follows: An indirect live-line uninterrupted power distribution method based on the method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms as described in 6, characterized in that, while a safe distance for indirect live-line work on the lower power distribution line is secured, the worker enters the upper power distribution line using a live-line bucket and removes protective equipment by indirect live-line work using a live-line work stick or the like.

18. The aforementioned main work process S240 involves performing jumper wire replacement work to replace the jumper wires of the existing upper power distribution line. The jumper wire replacement procedure is carried out as follows: With a safe distance ensured for indirect live-line work on the lower power distribution line, a live-line bucket is used to enter the upper power distribution line, and the power lines on both sides of the upper power distribution line are connected with bypass jumper cables, centered on the utility pole. The existing jumper wires connecting and fixing the wires on both sides are separated and removed. An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms, as described in 6, characterized in that a new jumper wire is installed and connected at the location where the existing jumper wire was removed, and the bypass jumper cable is removed.

19. The aforementioned main work process S240 involves replacing the wires of the existing upper distribution line, The aforementioned wire replacement work is carried out as follows: With a safe distance ensured for indirect live-line work on the lower distribution line, a live-line bucket is used to enter the upper distribution line, and the old wires are separated from the LP insulators or suspension insulators of the upper distribution line. The separated old power lines were moved to the side using an indirect live-line lift arm. An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms according to claim 6, characterized in that a new electric wire is installed and fixed to the LP insulator or suspension insulator from which the old electric wire has been separated.

20. The aforementioned main work process S240 involves inspecting existing upper power distribution lines, and performing line-by-line inspection work. The aforementioned track-specific inspection work will be carried out as follows: An indirect live-line uninterrupted power distribution method based on the method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms as described in 6, characterized in that a safe distance for indirect live-line work on the lower power distribution line is ensured, and the upper power distribution line is then entered into using a live-line bucket to inspect the upper power distribution line.

21. The aforementioned main work process S240 involves installing a switch on an existing upper power distribution line, The switch installation work is carried out as follows: With a safe distance ensured for indirect live-line work on the lower power distribution line, a live-line bucket is used to enter the upper power distribution line, and the power lines on both sides of the upper power distribution line are connected with bypass jumper cables, centered on the utility pole. The existing jumper wires connecting and fixing the wires on both sides are separated, After installing the switch on the utility pole, the switch is closed, An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms as described in 6, characterized in that the aforementioned bypass jumper cable is removed.

22. The aforementioned main work process S240 involves removing the switches of the existing upper power distribution line, The removal of the aforementioned switch is carried out as follows: With a safe distance ensured for indirect live-line work on the lower power distribution line, a live-line bucket is used to enter the upper power distribution line, and the power lines on both sides of the upper power distribution line are connected with bypass jumper cables, centered on the utility pole. Remove the aforementioned switch from the utility pole, Connect new jumper wires to the aforementioned wires on both sides. An indirect live-line uninterrupted power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms as described in 6, characterized in that the aforementioned bypass jumper cable is removed.

23. The upper and lower power distribution lines to be worked on are: Depending on how the crossarm is installed on the utility pole, it can be a single crossarm, a double crossarm, or a single-type built-in pole crossarm. An indirect live-line uninterruptible power distribution method based on a method for ensuring a safe distance for indirect live-line work using an extension arm for indirect live-line crossarms as described in 6, characterized in that the crossarm is used as a pinned pole, a tension pole, and an embedded pole in the form of a normal pole, an overhanging pole, or an overhanging pole, depending on the position and pole method in which the crossarm is installed on the utility pole.

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