JP6329838B2 - Overhead power transmission line removal method and overhead power transmission line - Google Patents

Description

  The present invention relates to an overhead transmission line removal construction method for removing an overhead transmission line, and an overhead transmission line.

  In coastal areas and industrial areas, overhead transmission lines in which an anticorrosive agent (hereinafter also referred to as anticorrosive grease) is applied to the outer peripheral surface are used as anticorrosion measures. The anti-corrosion grease applied to the outer peripheral surface of the overhead power transmission line is in a solidified state as the oil content is removed with aging. For this reason, when removing the overhead power transmission line or when collecting the overhead power transmission line, the overhead power transmission line passes through the gold wheel, so that the solidified grease falls below the line.

  For such a problem, for example, Patent Document 1 proposes a method of wrapping a tape in a longitudinal direction from the vertical direction to the longitudinal direction with respect to the electric wire before removal.

JP 2008-236969 A

  As a case where an electric wire is removed, as described in Patent Document 1, there is a wrapping method in which two tapes are sandwiched in the longitudinal direction from the vertical direction. However, in the lapping method described in Patent Document 1, for example, as illustrated in FIG. 7, even when the tapes 501 and 502 and the electric wire 510 in which the anticorrosive agent is applied to the outer layer of the electric wire are overlapped, the gaps 520 and 530 are formed. I can do it. In addition, even if the tapes 501 and 502 and the electric wire 510 are bonded, the anticorrosive agent solidified from the gap by peeling off the bonded portion due to an impact such as when the electric wire passes through the metal wheel for the following reasons. May fall under the line.

  Generally, in an overhead power transmission line, an outer layer is covered with a plurality of layers of aluminum wire, and steel strands are twisted in an alternating direction for each layer on the inner layer. Thus, since each layer strand is twisted in the mutual direction for each layer, when the overhead power transmission line is removed, the overhead power transmission line itself rotates depending on the strand twisting direction of the overhead power transmission wire. In particular, when passing over a metal wheel, the twist of the overhead power transmission line rotates in the direction of laughing (laughs), and the anticorrosive agent on the surface of the electric wire and the anticorrosive agent inside the electric wire easily fall.

  On the other hand, in the lapping method described in Patent Document 1, only the pressing in the longitudinal direction is performed, and the force for pressing the rotating direction of the electric wire is very weak. For this reason, an electric wire rotates at the time of removal of an electric wire, and it is difficult to prevent such rotation. In addition, the lapping method described in Patent Document 1 has a structure in which two tapes are bonded in the longitudinal direction in the longitudinal direction, so if an impact is applied for some reason and the tape breaks, the longitudinal attachment Therefore, the tape is greatly peeled in the longitudinal direction and hangs down, and in some cases, it may be blown by the wind to cause a short circuit accident due to contact with the reverse line, a ground fault accident under the line, or sag down the line. There is a problem that there is a possibility. Furthermore, in the lapping method, since the tape width is wide and the shape after the tape is attached is not circular, there is a problem that the workability is significantly reduced in the removal work compared to the normal removal work.

  An object of the present invention has been made in view of the above-described problems, and a method for removing an overhead power transmission line capable of removing an overhead power transmission line while reliably preventing anticorrosives from being scattered, and overhead transmission. The purpose is to provide electric wires.

(First aspect)
The method for removing an overhead power transmission line according to the first aspect of the present invention is a method for removing an overhead power transmission line for removing the overhead power transmission line, wherein the first anticorrosive scattering prevention tape is attached to the overhead power transmission line. It has a step of winding in a direction opposite to the strand twisting direction of the outermost layer.

  According to the first aspect, by winding the anticorrosive scattering prevention tape in the direction opposite to the strand twisting direction of the outermost layer of the existing overhead power transmission line, the wire twist is rotated in the direction of loosening (laughing) It becomes possible to alleviate that the surface anticorrosive agent and the anticorrosive agent inside the electric wire easily fall, and the overhead power transmission line can be removed while reliably preventing the anticorrosive agent from scattering.

(Second aspect)
In the method for removing an overhead power transmission line according to the second aspect of the present invention, the second anticorrosive agent scattering prevention tape is disposed on the outer periphery of the overhead power transmission line around which the first corrosion inhibitor scattering prevention tape is wound. The method further includes a step of winding in the same direction as the strand twisting direction.

  According to the said 2nd aspect, it becomes possible to prevent the fracture | rupture of the said tape more reliably by making the tape for anticorrosive agent scattering prevention into a double winding structure.

(Third aspect)
In the method for removing an overhead power transmission line according to the third aspect of the present invention, the third anticorrosive agent scattering prevention tape is disposed on the outer periphery of the overhead power transmission line around which the second anticorrosive agent scattering prevention tape is wound. It has a step of winding in a direction opposite to the strand twisting direction.

  According to the said 3rd aspect, it becomes possible to prevent the said fracture | rupture of a tape more reliably by making anticorrosive agent scattering prevention tape into a triple winding structure. Moreover, the anticorrosive scattering prevention tape which has a different function can be combined by setting it as a triple winding structure. For example, by combining a waterproof tape and a fiber-containing tape, it is possible to achieve both waterproofness and enhanced strength at break.

(Fourth aspect)
According to a fourth aspect of the present invention, there is provided a method for removing an overhead power transmission line, wherein the overhead power transmission wire around which the third anticorrosive agent scattering prevention tape is wound is provided with one or more layers of the anticorrosive agent scattering prevention tape. It has a step of winding by changing the winding direction so as to be opposite to the winding direction of the anticorrosive scattering tape wound around the outermost periphery of the power transmission line.

  According to the said 4th aspect, it becomes possible to prevent the said fracture | rupture of a tape more reliably by making the tape for anticorrosive agent scattering prevention into the multilayered structure of 4 or more layers. Moreover, the freedom degree which combines the anticorrosive scattering prevention tape which has a different function by setting it as the multilayer winding structure more than quadruple can be raised. For example, the degree of freedom of combining a waterproof tape and a fiber-containing tape is increased, and the waterproofness and the strength at break can be further enhanced.

(Other aspects)
In any aspect of the present invention as described above, the invention of the method for removing an overhead power transmission line can be regarded as an invention of an overhead power transmission line.

  According to the present invention, the overhead power transmission line can be removed while reliably preventing the anticorrosive agent from scattering.

It is a figure which shows the overhead power transmission wire which wound the 1st anticorrosive agent scattering prevention tape. It is a figure which shows the aerial transmission line which wound the 2nd anticorrosive agent scattering prevention tape around the outer periphery of the aerial transmission line which wound the 1st anticorrosion agent scattering prevention tape. It is a figure which shows an example of the construction method which winds the anticorrosive agent scattering prevention tape around an overhead power transmission line. It is a figure which shows the other example of the construction method which winds the anticorrosive agent scattering prevention tape around an overhead power transmission line. It is a figure for demonstrating the structure of the tape winding machine which winds the anticorrosive agent scattering prevention tape. It is a figure which shows the overhead power transmission line which wound the 3rd anticorrosive agent scattering prevention tape around the outer periphery of the overhead power transmission line which wound the 2nd anticorrosion agent scattering prevention tape. It is a figure which shows the prior art example of the overhead power transmission line which wrapped the thing for anticorrosive agent scattering prevention.

  A mode for carrying out the present invention (hereinafter referred to as the present embodiment) will be described with a specific example. The present embodiment relates to a method for removing an overhead power transmission line that removes an overhead power transmission line coated with an anticorrosive agent or the like on the outer peripheral surface, and an overhead power transmission line.

(1) Overhead Transmission Line Removal Construction Method The overhead transmission line removal construction method according to the present embodiment includes, for example, a winding process of a first anticorrosive scattering prevention tape 11 as shown in FIG. A second anticorrosive agent scattering prevention tape 12 winding step as shown in FIG. In the present embodiment, the first anticorrosive scattering prevention tape 11 and the second anticorrosive scattering prevention tape 12 are self-adhesive tapes having a self-adhesion layer on one surface of the tape body, for example, It consists of a material mainly composed of butyl rubber. The self-bonding layer may be made of a self-bonding material whose main component is other than butyl rubber.

(1-1) Winding Step of First Anticorrosive Scattering Prevention Tape A winding step of the first anticorrosive scattering prevention tape 11 will be described with reference to FIG. FIG. 1A is a view of the overhead power transmission line 10 as viewed from the side, and FIG. 1B is a cross-sectional view of the overhead power transmission line 10. As shown in FIG. 1 (A), for example, the overhead power transmission line 10 is an aluminum layer in which an anticorrosive agent is applied to the entire outer peripheral surface, and the outermost layer 10a of the overhead power transmission line 10 is twisted in the S twist direction. Thus, when the outermost layer 10a is twisted in the S twist direction, the winding process of the first anticorrosive agent scattering prevention tape 11, as shown in FIG. That is, the first anticorrosive scattering prevention tape 11 is wound in the Z twist direction. When viewed from FIG. 1 (B), the outermost layer 10a of the overhead power transmission line 10 and the first anticorrosive agent scattering prevention tape 11 are brought into close contact with each other.

  According to the winding process as shown in FIG. 1, by winding the first anticorrosive scattering prevention tape 11 in the direction opposite to the strand twisting direction of the outermost layer 10 a of the existing overhead power transmission line 10, The torsional rigidity can be relaxed. More specifically, the wire is not twisted (rotated) when passing through the gold wheel, and the tape can be prevented from being broken. By preventing breakage of the tape in this manner, the overhead power transmission line can be removed while reliably preventing the anticorrosive agent from scattering.

(1-2) Step of winding second anticorrosive agent scattering preventing tape Next, the step of winding the second anticorrosive agent scattering preventing tape 12 will be described with reference to FIG. 2A is a view of the overhead power transmission line 10 as viewed from the side, and FIG. 2B is a cross-sectional view of the overhead power transmission line 10. As shown in FIG. 2 (A), the second anticorrosive agent scattering prevention tape 12 is wound around the outer periphery of the overhead power transmission line 10 around which the first anticorrosive agent scattering prevention tape 11 is wound. The anticorrosive scattering tape 12 is wound in the same direction as the strand twist direction of the outermost layer 10a of the overhead power transmission line 10, that is, in the S twist direction. When viewed from FIG. 2 (B), the first anticorrosive scattering prevention tape 11 and the second anticorrosive scattering prevention tape 12 are brought into close contact with each other. That is, it is set as the laminated structure which consists of the outermost layer 10a of the overhead power transmission line 10, the 1st anticorrosive agent scattering prevention tape 11, and the 2nd anticorrosive agent scattering prevention tape 12.

  According to the winding process as shown in FIG. 2, it is possible to more reliably prevent the tape from being broken by making the anticorrosive scattering prevention tape have a double winding structure.

(2) Example of winding work of anticorrosive scattering prevention tape (2-1) First winding work example As an example of the work of winding the anticorrosive scattering prevention tape around an overhead power transmission line, a first winding work example will be described. . Specifically, in the first winding work example, as shown in FIG. 3, two single-seaters are installed on one overhead wire 10. Then, when the tape winding direction X is used as a reference, a worker 61 riding on the front air hoist 51 uses the tape winder 71 to suspend the first anticorrosive scattering prevention tape 11 in the Z twist direction. Wrap around the transmission line 10. Subsequently, with respect to the winding direction X, the worker 62 riding on the rear hoisting machine 52 uses the tape winder 72 to attach the second anticorrosive scattering prevention tape 12 in the S twist direction to the overhead power transmission line. 10 is wound around.

  In the first wrapping work example shown in FIG. 3, the worker 61 riding on the front air hoist 51 is placed on the overhead power transmission line 10 in which the first anticorrosive scattering prevention tape 11 is wound around the power transmission line. Since the rear spacecraft 52 passes, there is an advantage that there is no possibility of dropping the anticorrosive applied to the entire outer peripheral surface of the overhead power transmission line.

  In addition, the worker 62 who rides on the rear hoister 52 has the tape winding device disposed rearward with respect to the winding direction X, and performs the winding operation in the backward direction using the tape winding device disposed on the rear side. Thus, the roller of the air hoist 52 does not pass over the overhead power transmission line 10 around which the first anticorrosive agent scattering prevention tape 11 is wound. Therefore, the first anticorrosive agent scattering prevention tape 11 is made of high quality. The second anticorrosive scattering prevention tape 12 can be wound around the overhead power transmission line 10 in the state.

  In addition, as a modification of the first winding work example, a method of winding with a two-seater spacecraft may be used instead of the single-seater spacecraft. In this case as well, the rearward direction of the winding direction relative to the winding direction of the tape, that is, the direction of the second worker may be either the front or the rear direction. However, the front worker in the winding direction, that is, the first worker may wind the tape on the front side in the traveling direction in order to prevent the anticorrosive agent from falling due to the passage of the air hoist. In addition, a worker on the back of a two-seater hoisting machine winds backward with respect to the tape winding direction, so that the first anticorrosive scattering tape is suspended on the overhead power transmission line. The second anticorrosive scatter prevention tape can be wound around the overhead power transmission line without passing through the rollers of the machine.

  As another modified example, after the anticorrosive scattering prevention tape is wound on a one-person riding machine, the anti-corrosion agent scatters in the opposite direction to the one-person riding machine behind the two-person riding machine. It is possible to keep the anticorrosive scattering prevention tape in higher quality by wrapping the prevention tape and making the anticorrosion scattering prevention tape into a two-layer structure without passing through a two-seater airborne machine. It becomes.

(2-2) Second Winding Work Example A second winding work example will be described as another example of the work for winding the anticorrosive scattering prevention tape around the overhead power transmission line. Specifically, in the second winding work example, as shown in FIG. 4, a single-seat aircraft 50 is attached to one overhead wire 10, and the Z twist direction with respect to the overhead power transmission wire 10. After the first anticorrosive scattering prevention tape 11 is wound, the second anticorrosive scattering prevention tape 12 is returned in the S twist direction again to the starting point where the first anticorrosive scattering prevention tape 11 is wound. Wrap. There is an advantage that there is no possibility of dropping an anticorrosive agent also by the 2nd example of winding work.

(3) About Tape Winder In the method for removing the overhead power transmission line according to the present embodiment, the first anticorrosive scattering prevention tape 11 is twisted in Z by using, for example, a tape winder 200 as shown in FIG. It can be wound around the overhead power transmission line 10 in the direction.

  That is, as shown in FIG. 5, the tape winder 200 includes a winder body 210, a tape support member 220, a tape supply member 230, and a winding pitch changing mechanism 240. Here, the winder body 210 moves in the axial direction of the overhead power transmission line, that is, the winding direction X, while rotating around the axis of the overhead power transmission line. The tape support member 210 supports the first anticorrosive agent scattering prevention tape 11 so as to be able to be wound around the overhead power transmission line 10 in the Z twist direction. The tape providing member 230 supplies the first anticorrosive agent scattering preventing tape 11 to the overhead power transmission line 10 according to the movement of the winder body 210. The winding pitch changing mechanism 240 includes at least two holding members 241 and 242 that press the outer peripheral surface of the overhead power transmission line 10 in the radial direction in order to change the winding pitch of the first anticorrosive agent scattering prevention tape 11. . Here, the clamping members 241 and 242 are roller members 241a and 242a that are in contact with the outer peripheral surface of the overhead power transmission line 10, and biasing members 241b that bias the roller members 241a and 242a in a direction close to the overhead power transmission line 10. 242b and angle changing members 241c and 242c for changing the shaft angle of the roller members 241a and 242a with respect to the axis of the overhead power transmission line 10.

  By using the tape winder having the configuration as shown in FIG. 5, the first anticorrosive scattering prevention tape 11 can be wound in the Z twist direction.

  Further, in order to wind the second anticorrosive scattering prevention tape around the overhead power transmission line 10 in the S twist direction, the first anticorrosive scattering prevention tape 11 and the tape supporting member 220 shown in FIG. By attaching the second anticorrosive scattering prevention tape 12 in the opposite direction, the second anticorrosive scattering prevention tape 11 can be wound around the overhead power transmission line 10 in the S twist direction.

  In addition, in the removal method of the overhead power transmission line according to the present embodiment, the first anticorrosive agent scattering prevention tape 11 and the second anticorrosive agent scattering prevention tape 12 are respectively applied to the twisting direction of the overhead power transmission line 10. As long as it is a tape winder that can be wound in the reverse direction and the same direction, not only the tape winder 200 as shown in FIG. 5 but also other structures can be used.

  In particular, the tape winder 200 as shown in FIG. 5 is preferable in that the winding pitch can be changed by changing the shaft angle of the roller members 241a and 242a by the angle changing members 241c and 242c. That is, the first and second anticorrosive scattering prevention tapes 11 and 12 are wound in the opposite directions and while being adjusted to the same winding pitch, thereby preventing the tape from breaking more reliably. Is possible.

(4) Modification The method for removing an overhead power transmission line according to the present invention is not limited to the double winding structure of the anticorrosive scattering prevention tape, such as the winding step shown in FIG. In the winding step shown in FIG. 6, a third anticorrosive scattering prevention tape 13 is further attached to the outer periphery of the overhead power transmission line 10 around which the second anticorrosive scattering prevention tape 12 is wound. You may wind in the reverse direction to the winding direction of the tape 12 for scattering prevention. Here, FIG. 6 (A) is a view of the overhead power transmission line 10 around which the third anticorrosive agent scattering prevention tape 13 is wound, and FIG. 6 (B) is the overhead power transmission line 10. FIG. By making the anticorrosive scatter preventing tape into a triple winding structure by the winding process shown in FIG. 6, it becomes possible to prevent the tape from breaking more reliably. Moreover, the anticorrosive scattering prevention tape having different functions can be combined by adopting a triple winding structure, for example, by combining a waterproof tape and a fiber-containing tape, both waterproofness and enhancement of breaking strength are achieved. be able to.

  Furthermore, the method for removing an overhead power transmission line according to the present invention includes a third layer of the anticorrosive agent scattering prevention tape wound around the overhead transmission line around which the anticorrosive agent scattering prevention tape is wound. You may wind by changing a winding direction so that it may become a reverse direction to the winding direction of the anticorrosive agent scattering prevention tape wound around the outer periphery. Specifically, the even-numbered (fourth and sixth anticorrosive agent prevention tapes) are in the same direction as the strand twisting direction, and the odd-numbered (fifth and seventh anticorrosion agent prevention tapes) are strand twisting. Wind in the opposite direction. Thus, by making the anticorrosive scattering prevention tape have a quadruple or more multilayer winding structure, it becomes possible to more reliably prevent the tape from being broken. In addition, it is possible to increase the degree of freedom of combining anticorrosive scattering prevention tapes having different functions by adopting a quadruple or more multi-layer winding structure. For example, the degree of freedom of combining a waterproof tape and a fiber-containing tape increases, Property and strength at break can be further enhanced.

DESCRIPTION OF SYMBOLS 10 Overhead power transmission line 10a Outermost layer 11 1st anticorrosive scattering prevention tape 12 2nd anticorrosive scattering prevention tape

Claims (8)

In the construction method for removing overhead power transmission lines that are formed by twisting strands and coated with anticorrosive on the outer peripheral surface ,
A method for removing an overhead power transmission line, comprising the step of winding the first anticorrosive scattering prevention tape in a direction opposite to the strand twisting direction of the outermost layer of the overhead power transmission line.   A step of winding the second anticorrosive agent scattering prevention tape in the same direction as the strand twisting direction on the outer periphery of the overhead power transmission line around which the first anticorrosive agent scattering prevention tape is wound. The method of removing an overhead power transmission line according to claim 1.   A step of winding the third anticorrosive agent scattering prevention tape in the direction opposite to the strand twisting direction around the outer periphery of the overhead power transmission line around which the second anticorrosive agent scattering prevention tape is wound. A method for removing the overhead power transmission line according to claim 2.   Winding of the anticorrosive scattering prevention tape wound around the outermost periphery of the overhead power transmission line with one or more layers of the anticorrosive scattering prevention tape wound around the overhead power transmission line around which the third anticorrosive scattering prevention tape is wound The method for removing an overhead power transmission line according to claim 3, further comprising a step of winding by changing a winding direction so as to be opposite to the direction. An overhead power transmission line in which an anticorrosive is applied to the outer peripheral surface,
During the removal work of the overhead power transmission line, the first anticorrosive scattering prevention tape is wound in the direction opposite to the strand twisting direction of the outermost layer of the overhead power transmission line ,
The overhead power transmission line, wherein the first anticorrosive scattering prevention tape is a self-adhesive tape having a self-adhesion layer on one surface of the tape body .   The second anticorrosive agent scattering prevention tape is wound around the outer periphery of the overhead power transmission line around which the first anticorrosive agent scattering prevention tape is wound in the same direction as the strand twisting direction. Item 6. The overhead power transmission line according to Item 5.   The third anticorrosive agent scattering prevention tape is wound around the outer periphery of the overhead power transmission line around which the second anticorrosive agent scattering prevention tape is wound, in the same direction as the strand twisting direction. Item 6. The overhead transmission line according to item 6.   Winding of the anticorrosive scattering prevention tape wound around the outermost periphery of the overhead power transmission line with one or more layers of the anticorrosive scattering prevention tape wound around the overhead power transmission line around which the third anticorrosive scattering prevention tape is wound The overhead power transmission line according to claim 7, wherein the overhead power transmission line is wound by changing a winding direction so as to be opposite to the direction.

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