JP2007116835A - Method of replacing overhead ground wire and hanging pulley device used in method of replacing overhead ground wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of replacing an overhead ground wire wherein it is unnecessary to use a self-propelled device for extending a snatch block by a pilot rope and invert a snatch block between a new overhead ground wire and an existing overhead ground wire, and it is possible to reduce of hours of work and save working labor; and a hanging pulley device used in a method for replacing an overhead ground wire. <P>SOLUTION: The method of replacing an overhead ground wire is for replacing an existing overhead ground wire strung between steel towers with a new one. The method includes the steps of installing a circle snatch block as a hanging pulley device on an existing overhead ground wire in a planned disposing position when the overhead transmission line is dead, and respectively fastening a pair of snatch block ropes extended from the circle snatch block to a pair of left and right main overhead transmission lines; reducing the tension of the existing overhead ground wire to hang the existing overhead ground wire from the overhead transmission lines; replacing the existing overhead ground wire with a new one; tensioning it after the new overhead ground wire is installed; and recovering the hanging pulley device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an overhead ground wire replacement method for replacing an existing overhead ground wire installed between a plurality of steel towers with a new overhead ground wire and a suspension pulley device used in the overhead ground wire replacement method. is there.

  Conventionally, when the existing overhead ground wire P suspended between the steel towers T1, T2, and T3 is replaced with the new overhead ground wire Q, the following method has been used.

  First, as shown in FIG. 9, the overhead power transmission line R located below the existing overhead ground wire P is brought into a stopped state.

  Next, an operator goes up to the steel tower T1, and arranges the self-propelled aircraft V on the existing overhead ground wire P. Further, following the self-propelled aircraft V, a nylon pilot rope L1 to which a plurality of single-wheel type gold wheels 13 are attached is disposed on the existing overhead ground wire P. And the self-propelled aircraft V and the front-end | tip part of pilot rope L1 are connected.

  After that, as shown in FIG. 10, the self-propelled aircraft V arranged on the erection ground line P is caused to travel, and the pilot rope L <b> 1 is stretched over the existing terrestrial ground line P via the plurality of single-wheeled gold wheels 13. Expand to alternate section.

  Next, as shown in FIG. 11, a plurality of suspension wheels 11 are arranged on the existing overhead ground wire P at the upper part of each steel tower T2.

  As shown in FIG. 12, the suspension wheel 11 is formed by attaching an upper metal wheel 11A and a lower metal wheel 11B to both ends of a string-like connecting member 12 having a predetermined length. Further, a predetermined rope stopper 12 </ b> A is provided at the center of the connecting member 12.

  Then, the upper gold wheel 11A of the connecting member 12 is set to the existing overhead ground wire P, and the plurality of suspension wheels 11 are suspended from the existing overhead ground wire P.

  As shown in FIG. 11, each suspension wheel 11 is connected by a coasting rope L2. Specifically, a single coasting rope L2 is passed through the rope stopper 12A of the connecting member 12 constituting the suspension wheel 11, and a predetermined portion of the coasting rope L2 is passed through the rope stopper 12A of each connecting member 12. It is fixed.

  A single wire rope L3 is placed on the lower metal wheel 11B of the plurality of suspension wheels 11.

  Then, as shown in FIG. 11, the rear end portion of the pilot rope L <b> 1 and the coasting rope L <b> 2 and the wire drawing rope L <b> 3 of the suspension wheel 11 are connected via the joint portion S.

  In this state, the pilot rope L1 is wound on the adjacent steel tower T1 (T3) side, and the plurality of suspension wheels 11 are developed along the existing overhead ground wire P, for example, at intervals of 20 to 30 m. As a result, the extension rope L3 is deployed in the entire re-extended section of the existing overhead ground wire P via the plurality of suspension wheels 11.

  Next, as shown in FIG. 13, on one steel tower T <b> 1 side, the newly installed overhead ground wire Q wound around the drum D and the end of the extension rope L <b> 3 are connected. Then, while using the existing overhead ground wire P as a support wire, on the other side of the steel tower T3, the winding rope L3 is wound up by the winding device E, and the new overhead ground wire Q is extended to the entire replacement section.

  After completion of the extension of the newly installed ground wire Q, the newly installed ground wire Q is temporarily secured to the steel towers T1 and T3 by using cam along, and a certain amount of tension is applied to the newly installed ground wire Q. At the same time, the existing overhead ground wire P is fixed to the steel towers T1 and T3 using the cam along, and then the tension of the existing overhead ground wire P is relaxed using the lever block.

  Then, as shown in FIG. 14, from the state where the new overhead ground wire Q is positioned below, with the existing overhead ground wire P positioned above as a support line, the new overhead ground wire Q is positioned above and the existing overhead ground wire Q is positioned below. In the state where the ground line P is located, the positions of the newly installed overhead ground line Q and the existing overhead ground line P are reversed. In addition, in the steel tower T2 located in the middle, the existing overhead ground wire P is mounted on the gold wheel attached to the upper end part of the steel tower T2.

  In this inverted state, the existing overhead ground wire P and the extension wire L3 are connected via the joint S on the other steel tower T1 side. And on the other steel tower 1 side, the wire drawing rope L3 is wound up by a predetermined winding device E. Then, the existing aerial ground wire P located below with the newly installed aerial ground wire Q as a support line is pulled and moved by the extension rope L3, and finally constructed between the steel towers T1, T2, and T3. The existing overhead ground wire P is removed.

  After the removal of the existing overhead ground wire P is completed, as shown in FIG. 15, the brake W is arranged on the new overhead ground wire Q at the upper part of each of the steel towers T1 and T3. Then, the extension wire L3 and the coasting rope L2 of the suspension wheel 11 are connected to the brake W, and the coasting rope L2 is wound on the adjacent steel tower T2 while the suspension wheel 11 is braked. To collect all the suspension wheels 11.

  On the other hand, conventionally, there is a hanging wheel apparatus used for overhead power transmission line replacement as disclosed in Patent Document 1.

  This suspension wheel apparatus includes left and right inclined rollers, horizontal rollers arranged horizontally in the vicinity of the lower ends thereof, a frame to which the lower ends of the inclined rollers and the horizontal rollers are respectively attached, and intervals provided at the left and right ends of the frames. It is connected via a suspension rope to a holding rope connection tool and a connection tool provided on the upper part of the support shaft of each inclined roller, and is suspended separately from two side-by-side overhead power transmission lines. It consists of two suspension wheels designed to generate a groove in the lower depression defined by the suspension rope and the inclined rope.

  Further, conventionally, there is another reconstructing method for overhead power transmission lines as disclosed in Patent Document 2.

This rehabilitation method installs a large number of reversing suspension wheels over the entire length of every two upper and lower strips of the existing overhead ground wire, and arranges the arrangement yoke mounting bracket for each balance yoke at both ends of the existing overhead ground wire to be replaced. After attaching the array yoke via the first, first remove the two existing overhead ground wires from the balance yoke, and then replace them with the new overhead ground wire by supporting them on the reversible suspension wheel. Attach both ends to the outer end of the array yoke, widen the distance between the new overhead ground wires, loosen the tension of the existing overhead ground wires in the upper two sections, reverse the suspension wheel, and hang down to the new overhead ground wire, The two existing overhead ground wires are supported by each suspension wheel and replaced with a new overhead ground wire, and then returned to the original position of the balance yoke and fixed.
JP 2005-168141 A JP 2003-125507 A

  However, the above-described method of replacing the existing overhead ground wire P with the new overhead ground wire Q has had the following adverse effects.

  In other words, in the conventional repositioning method, the pilot rope is placed on the existing overhead ground wire, so that it takes a predetermined time and labor to place the pilot rope, and the same effort is required to remove the pilot rope. It was not possible to efficiently replace the existing overhead ground wire suspended between them with the new overhead ground wire.

  In addition, the conventional repositioning method was implemented by hanging a hanging wheel on the existing overhead ground wire or the upper phase wire of one side of the line. In such a case, the self-propelled aircraft failed to deploy the pilot rope. Many problems such as this occurred. For example, if the self-propelled aircraft stopped halfway, an operator had to hang on the existing overhead ground line and repair the self-propelled aircraft.

  Furthermore, when extending a newly installed overhead ground wire, there is a possibility that the suspension wheel may get entangled when the joint portion passes. Moreover, the entangled state is very difficult to distinguish for track maintenance staff themselves.

  In addition, in order to use the self-propelled aircraft, it was necessary to perform the troublesome work of removing the hard snow ring etc. installed on the overhead ground wire in advance.

  In addition, there was an adverse effect that the suspension car and the existing overhead ground wire / new overhead ground wire were entangled in the middle.

  In addition to this, various problems have occurred due to excessive lifting when the extension of the newly installed overhead ground wire and the tension reduction of the existing overhead ground wire are repeated.

  Furthermore, since it takes time to reverse the existing overhead ground wire and the newly installed overhead ground wire, the work from installation to removal may not be completed in one day when there are many target spans. And, at night, when the tension of the existing overhead ground wire is relaxed while remaining in the middle of the relocation work, protection measures are taken to prevent the existing overhead ground wire from coming into contact with the transmission line due to the sideways wind. It was necessary.

  Moreover, it was necessary to prepare a set of a suspension wheel, a coasting rope, and a wire rope on the ground, and it took a considerable amount of time to prepare in advance.

  On the other hand, since the hanging wheel device disclosed in Patent Document 1 uses two hanging wheels, it is necessary to attach a pilot rope and a device for preventing sideways to the hanging wheel device itself in advance. .

  In addition, the conventional hanging wheel apparatus is used for re-covering while supporting a power transmission line by a combination of a frame and a horizontal roller / inclined roller, and a multi-conductor in the case of using two or more wires for one phase of the power transmission line. It was created for the subject. Therefore, the present invention is not applicable to the replacement of one imaginary ground wire.

  In addition, the other reconstructing method of the overhead power transmission line disclosed in Patent Document 2 suspends many suspension cars in a limited range of the armrest part of the steel tower, so the interval between the suspension cars becomes narrower, When the wind blows, there is a difficulty in causing a collision between wires. In addition, there is a risk that the electric wire is damaged by the collision phenomenon and noise is generated by the collision sound. Furthermore, during the redrawing work, there is a problem that it is easily affected by the wind because the slack of the electric wire is large and the rewinding work of the electric wire is easily interrupted due to the wind.

  Therefore, the present invention was created in view of the existing circumstances such as the above, and the use of a self-propelled aircraft for deploying a suspension car with a pilot rope, and the use of a new and existing overhead ground wire. There is no need to reverse the suspension wheel, and there is no entanglement caused by twisting of the suspension vehicle and the existing overhead ground wire. The contact between the overhead ground wire and the power transmission line at the time can be avoided, and the preliminary preparation of the suspension car, coasting rope, and extension line is not necessary, so that the working time can be shortened and the labor can be saved. An object of the present invention is to provide a suspension pulley device used in the ground wire replacement method and the overhead ground wire replacement method.

  The present invention is an aerial ground wire replacement method that replaces an existing aerial ground wire installed between a plurality of steel towers with a new aerial ground wire. Attach a circle pulley as a suspension pulley device at the position and attach a pair of suspension ropes extending from the circle pulley wheel to a pair of left and right main lines of the overhead power transmission line, Reduce the tension of the overhead ground wire, suspend the existing overhead ground wire from the overhead power transmission line, replace the existing overhead ground wire with the new overhead ground wire, and complete the extension of the new overhead ground wire Later, the above-mentioned problem was solved by comprising again the step of tensioning the newly installed overhead ground wire and the step of collecting the suspended pulley device.

  In addition, the suspension pulley device is attached by one worker on each of the two overhead power transmission lines at the top of each steel tower, and the circle gold wheel passing through the existing overhead ground wire is connected with a pair of suspension ropes. The above-mentioned problem was solved by comprising the step of coasting and the step of securing the suspension rope to each of the overhead power lines after moving the circle gold wheel to the planned position of placement.

  Further, the mounting process of the suspension pulley device includes a step of coasting a plurality of circle metal wheels passing through the existing overhead ground wire with a pair of suspension ropes, and a plurality of circle metal wheels moved to an arrangement planned position. The problem mentioned above was also solved by including the process of tying a suspension rope to each transmission line.

  In addition, the step of replacing the existing overhead ground wire with the new overhead ground wire includes the step of connecting the existing overhead ground wire and the new overhead ground wire via a joint portion, and winding the existing overhead ground wire with the overhead wire winch. The above-mentioned problem has been solved by including the step of extending the newly installed overhead ground wire at the same time that the existing overhead ground wire is removed.

  In addition, the step of recovering the suspended pulley device has solved the above-described problem by returning the suspended pulley device to the main line of the overhead power transmission line.

  On the other hand, the suspension pulley apparatus used in the overhead ground wire replacement method according to the present invention is a suspension pulley apparatus used to replace an existing overhead ground wire installed between a plurality of steel towers with a new overhead ground wire. A pair of suspension wheels that are circularly formed so as to be attached to the existing overhead ground wire, and a base end that is secured to the circle suspension wheel, and a distal end that is secured to each of the two overhead power transmission lines. By comprising a gold rope, the same problem as described above was solved.

  Moreover, the circle metal wheel solved the same problem as described above by connecting a plurality of rollers in a ring shape through bearings.

  Furthermore, the circle money wheel solved the same problem as described above by opening and closing a predetermined portion.

  Moreover, the circle metal wheel solved the same problem as described above, because one side of a pair of bearings supporting the roller can be rotated via a hinge, and the other side of the bearing is fixed by a clasp.

  According to the present invention, since it is not necessary to arrange the pilot rope on the existing overhead ground wire as in the conventional replacement method, the arrangement work of the pilot rope and the removal work can be omitted, and the existing overhead air suspended between the steel towers can be omitted. The work of replacing a ground wire with a newly installed overhead ground wire can be performed efficiently.

  In addition, the wire clamp can be smoothly passed by eliminating the entanglement caused by the twisting of the suspension wheel and the existing and newly installed overhead ground wire. Contact with the electric wire can also be avoided.

  Furthermore, since preparations such as a hanging wheel, a coasting rope, and a wire rope are not required, the working time can be shortened and the labor can be saved.

  In addition, it is possible to avoid troubles associated with the reversing work such as excessively lifting the newly installed overhead ground wire as in the conventional re-stripping method.

  In addition, even in a small-sized section or a section where the existing overhead ground line is deteriorated and the air hoist cannot be used, the work of replacing the existing overhead ground line with the new overhead ground line can be easily performed.

  In addition, the suspension pulley apparatus used in the overhead ground wire replacement method and the overhead ground wire replacement method according to the present invention can also be applied to replacement of predetermined wires.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  INDUSTRIAL APPLICABILITY The present invention is used in an overhead ground wire replacement method and an overhead ground wire replacement method for replacing an existing overhead ground wire P installed between a plurality of steel towers T1, T2, and T3 with a new overhead ground wire Q. This relates to the suspension pulley apparatus 1.

As shown in Fig. 1,
A. When the overhead power transmission line R is stopped, the circle gold wheel 2 of the suspension pulley device 1 is attached to the planned position of the existing overhead ground wire P, and the pair of hanging ropes 3A and 3B extended from the circle gold wheel 2 are suspended. An attachment step of the suspension pulley device 1 to be secured to a pair of left and right main lines of the transmission line R;
B. A step of reducing the tension of the existing overhead ground wire P and suspending the existing overhead ground wire P to the overhead power transmission line R;
C. Replacing the existing overhead ground wire P with the new overhead ground wire Q;
D. After completing the extension of the new overhead ground line Q, the process of tensioning the new overhead ground line Q again,
E. Collecting the suspension pulley device 1.

A. The mounting process of the suspension pulley device 1 includes:
a1. At the top of each tower T1, T2 and T3, one worker is set on each of the two overhead power transmission lines R at the same time, and the circle wheel 2 passing through the existing overhead ground line P is connected with a pair of suspension ropes 3A and 3B. The process of coasting,
a2. After the circle gold wheel 2 is moved to the arrangement plan position, the suspension ropes 3A and 3B are secured to each of the overhead power transmission lines P.

In addition, A. The mounting process of the suspension pulley device 1 includes:
aa1. A step of coasting a plurality of circle gold wheels 2 passing through the existing overhead ground wire P with a pair of hanging ropes 3A and 3B;
aa2. After moving the plurality of circle gold wheels 2 to the arrangement plan position, the process includes a step of securing the suspension ropes 3A and 3B to the overhead power transmission lines R, respectively.

In addition, C.I. The process of replacing the existing overhead ground wire P with the new overhead ground wire Q
c1. Connecting the existing overhead ground wire P and the newly installed overhead ground wire Q via the joint portion S;
c2. The process includes a step of winding the existing overhead ground wire P with the overhead wire winch, removing the existing overhead ground wire P, and simultaneously extending the new overhead ground wire Q.

  In addition, E.I. In the process of collecting the suspended pulley device 1, an operator starts again on the main line of the overhead power transmission line R, and the suspended pulley device 1 is collected.

  Below, the suspension pulley apparatus 1 used by an overhead ground wire replacement method is demonstrated.

  The suspension pulley apparatus 1 is used to replace an existing overhead ground wire P installed between a plurality of steel towers T1, T2, and T3 with a new overhead ground wire Q.

  The suspension pulley apparatus 1 includes a circle metal wheel 2 formed in an annular shape so as to be attached to an existing overhead ground wire P, and an overhead power transmission line R having a proximal end secured to the circle metal wheel 2 and having two ends. It consists of a pair of hanging ropes 3A and 3B secured to each.

  That is, as shown in FIG. 2 and FIG. 3A, the circle gold wheel 2 of the suspension pulley device 1 is connected to a drum-shaped roller 2A whose center is constricted in an arc shape via a bearing 2B. .

  In this example, for example, six rollers 2A are used to form an overall hexagonal ring so that the outer surfaces of the existing overhead ground wire P and the newly installed overhead ground wire Q are in contact with the respective rollers 2A. It is. Therefore, when the circle gold wheel 2 attached to the existing overhead ground wire P moves, the roller 2A rotates smoothly and the outer surface of the existing overhead ground wire P is not damaged. Similarly, when the existing aerial ground wire P and the new aerial ground wire Q supported by the circle gold wheel 2 are moved, the respective rollers 2A that are in contact with each other rotate smoothly so that the existing aerial ground wire P and the new aerial ground wire P are moved. The outer surface of the ground line Q is not damaged.

  As shown in FIGS. 2 and 3 (a), two eyebolts 2C arranged and fixed between a pair of bearings 2B supporting one roller 2A located above are fixed to two eyebolts 2C. The base ends of the hanging ropes 3A and 3B are secured. The ends of the suspension ropes 3A and 3B are respectively secured to the overhead transmission line R of the upper phase of the No. 1 line and the upper phase of the No. 2 line.

  Further, as shown in FIGS. 2 and 3 (b), the roller 2A located on the side opposite to the fixing portion of the eyebolt 2C can be opened and closed so that the existing overhead wire P can be inserted into the circle metal wheel 2. It has become. That is, one side of the pair of bearings 2 </ b> B supporting the roller 2 </ b> A positioned below is rotatable via the hinge portion 4. Further, the other side of the pair of bearings 2B is fixed in a closed state by the clasp portion 5.

  As shown in FIGS. 2 and 3B, the clasp portion 5 is provided with an annular locking groove portion 5b at the tip of a protrusion 5a whose one end is rotatably attached to the bearing 2B. The locking groove 5b is formed in a U-shaped engagement recessed from the end side surface of the locked piece 5c that is rotatable via the shaft 4a of the hinge 4 supporting the roller 2A. It is engaged with the mating groove 5d and fixed in the closed state.

  When the clasp portion 5 is opened, the rotary lever type handle 6 connected to the locked piece 5c is slightly rotated around the shaft portion 4a, and the locked piece 5c is locked from the locking groove portion 5b of the protrusion 5a. After the engagement groove 5d is removed, the locked piece 5c is rotated via the hinge portion 4.

  The bearing 2B at the open end of the roller 2A is formed with a mounting hole 7 for engaging with the adjacent counterpart bearing 2B.

  When the suspension pulley device 1 is used, both the No. 1 and No. 2 overhead transmission lines R installed so that the two strips are parallel to each other are stopped, and as shown in FIG. 4 to FIG. By attaching the ends of the pair of suspension ropes 3A and 3B to the overhead transmission line R of the phase and the upper phase of line 2 and attaching the circle metal wheel 2 to the existing overhead ground line P, the existing overhead ground line P Is supported from both sides by two overhead power transmission lines R, and the existing overhead ground wire P is replaced with the newly installed overhead ground wire Q.

  Next, the step of replacing the existing overhead ground wire P suspended between the steel towers T1, T2, and T3 with the newly installed overhead ground wire Q using the suspension pulley device 1 configured as described above will be described in detail. .

(A. Installation process of suspension pulley device)
In this process, in the stopped state of the overhead power transmission line R, the pair of suspension ropes 3A attached to the circle pulley 2 of the suspension pulley 1 at the planned position of the existing overhead ground wire P and extending from the circle suspension 2 -3B is secured to a pair of left and right main lines of the overhead power transmission line R, respectively.

  Specifically, first, as shown in FIG. 4, the overhead power transmission line R is brought into a stopped state. In addition, the existing overhead ground wire P is subjected to tension reduction in order to have the same degree of sag as when it was extended (at this time, the reversing operation is not performed). This tension reduction is performed by fixing the existing overhead ground wire P to the steel towers T1 and T3 using the cam along and then loosening the tension of the existing overhead ground wire P using the lever block.

  Then, the tension clamp and the suspension clamp of the existing overhead ground wire P are disassembled, and the suspension pulley device is attached to the existing overhead ground wire P in order to transfer to the suspension pulley device 1 above the steel towers T1, T2, and T3. 1 circle wheel 2 is attached.

  Specifically, as shown in FIG. 8 (a), for example, three circle wheels 2 of the suspension pulley device 1 are attached to the existing overhead ground wire P at positions close to the steel towers T1, T2, and T3.

  And as shown in Fig. 5 and Fig. 8 (a), in the upper part of each tower T1, T2, and T3, a suspension is attached to each of the left and right parallel phase 1 and phase 2 on the main line. , A tower worker rides on each of these airborne devices and travels together toward the next steel tower.

  At this time, one tower worker carries the hanging rope 3A secured to the circle wheel 2 and the other tower worker carries the hanging rope 3B and proceeds respectively.

  Therefore, the circle wheel 2 of the suspension pulley 1 attached to the existing overhead ground line P moves along the existing overhead ground line P as the tower worker advances.

  Then, as shown in FIGS. 5 and 8 (b), if the circle gold wheel 2 is moved to the planned position of the suspension pulley device 1 (for example, three equally spaced locations on the existing overhead ground line P), At that position, the ends of the suspension ropes 3A and 3B are secured to the upper phase of the No. 1 line and the upper phase of the No. 2 line at the horizontal position of the overhead transmission line R, respectively.

  In this state, as shown in FIG.8 (b), the existing overhead ground wire P is located above the pair of left and right main line upper lines.

(B. Step of reducing the tension of the existing overhead ground wire P and suspending the existing overhead ground wire P to the overhead power transmission line R)
Thereafter, as shown in FIG. 5, the tension of the existing overhead ground wire P is reduced. At this time, after fixing the existing overhead ground wire P to the steel towers T1 and T3 using the cam along, the tension of the existing overhead ground wire P is relaxed using the lever block.

  Then, as shown in FIG. 8 (c), the existing overhead ground wire P is positioned below the pair of left and right main lines, and the existing overhead ground wire P is suspended by the pair of left and right main lines. .

  That is, from the state where the overhead power transmission line R is located below with the existing overhead ground wire P positioned as a support line, the state where the existing overhead ground wire P is located below with the overhead power transmission line R located above as a support line In addition, the positions of the existing overhead ground wire P and the overhead power transmission line R are reversed.

  In addition, in the steel tower T2 located in the middle and T1 and T3 located in both ends, the existing overhead ground wire P is mounted on the gold wheel attached to the upper end part of the steel tower T1, T2, and T3.

(C. Process of replacing existing overhead ground wire P with newly installed overhead ground wire Q)
Thereafter, as shown in FIG. 6, the existing overhead ground wire P and the new overhead ground wire Q are connected via the joint portion S. The newly installed overhead ground wire Q is sent out toward the steel tower T2 from the one wound around the drum D installed in the vicinity of the steel tower T1.

  On the other hand, the existing overhead ground wire P is wound up by a predetermined winding device E on the other steel tower T3 side. Then, the existing overhead ground wire P suspended from the overhead power transmission line R located above via the circle metal wheel 2 of the suspension pulley 1 is moved to the steel tower T3 side and removed.

  Further, since the newly installed overhead ground line Q is connected to the existing overhead ground line P, as shown in FIG. 8D, the overhead power transmission line R located above is used as a support line, and the circle of the suspension pulley device 1 is used. The newly installed overhead ground wire Q is suspended through the gold wheel 2, and the newly installed overhead ground wire Q is extended between the steel towers T1, T2, and T3.

  At this time, since the existing overhead ground wire P and the newly installed overhead ground wire Q are transported so as to ride on the roller 2A of the circle metal wheel 2 in the suspension pulley 1, the outer surface thereof is not damaged. Moreover, the situation where the joint part S which connects the existing aerial ground wire P and the new aerial ground wire Q is caught, and the difficult snow ring attached to the existing aerial ground wire P can also be prevented.

(D. After completing the extension of the new overhead ground line Q, the process of tensioning the new overhead ground line Q again)
After that, when a predetermined tension is applied to the newly installed overhead ground wire Q using the cam-along lever block, the newly installed overhead ground wire Q is positioned above the pair of left and right main line overhead lines as shown in FIG. 8 (e). Will be.

  That is, the position of the newly installed overhead ground line Q is reversed from the state in which the newly installed overhead ground line Q is positioned below the pair of left and right main line overline positions to the state in which it is positioned above the pair of left and right main line above line positions.

(E. Process of collecting the suspension pulley device)
Then, after the completion of the extension of the newly installed overhead ground line Q, as shown in FIG. 7, again, as shown in FIG. Attach and the tower worker on this airborne device travels together toward the next steel tower while collecting the suspension pulley device 1.

  Finally, a predetermined tension is applied to the extended new ground wire Q, and the new ground wire Q is fixed between the steel towers T1, T2, and T3. That is, the new overhead ground wire Q is temporarily fastened to the steel towers T1 and T3 using cam along, and a certain amount of tension is applied to the new overhead ground wire Q using a lever block, and then between the steel towers T1, T2, and T3. Fix the new overhead ground line Q.

  INDUSTRIAL APPLICABILITY The present invention is used in an overhead ground wire replacement method and an overhead ground wire replacement method for replacing an existing overhead ground wire P installed between a plurality of steel towers T1, T2, and T3 with a new overhead ground wire Q. The hanging pulley device 1 can be widely used for various constructions.

It is explanatory drawing which showed each process of the overhead ground wire replacement method in this invention. It is a partially expanded front view which shows the structure of the suspension pulley apparatus used with the overhead ground wire replacement method in this invention. The structure of a suspension pulley apparatus is shown, (a) is a perspective view of the state which has closed the clasp part of a circle money wheel, (b) is the perspective view of the state which has open | released the clasp part of a circle money wheel It is. It is a side view which shows the state before implementation of the replacement of the existing overhead ground wire between steel towers. Move the circle pulley wheel of the suspension pulley device attached to the existing overhead ground line to the planned position, and at that position, suspend both sides of the first phase on the main line and the second phase on the main line of the overhead transmission line. It is a partially expanded side view which shows the state which tied the front-end | tip of the gold rope. It is a side view showing a state in which the tension of an existing overhead ground wire is reduced, the existing overhead ground wire is connected to the new overhead ground wire, and the existing overhead ground wire is removed and the new overhead ground wire is extended simultaneously . It is a side view which shows the state in which the tower worker is riding the air hoist and collect | recovering a suspension pulley apparatus. Explaining each process of the overhead ground wire replacement method, (a) At the position close to the steel tower, install a hoistor on each of the parallel phase 1 on the main line and the phase 2 on the main line. Schematic perspective view showing a state in which three circle pulleys of a suspension pulley device are attached to an existing overhead ground wire. (B) is a diagram showing a state where the suspension machine advances and the horizontal line of the overhead transmission line is at the planned position of the suspension pulley device. Schematic perspective view showing the state in which the tip of the suspension rope is secured to each of the upper phase of Line 1 and the upper phase of Line 2 in position, (c) is the tension of the existing overhead ground wire, Schematic perspective view showing a state in which an existing overhead ground line is suspended by a pair of left and right main lines and the line is located below a pair of left and right main lines, (d) supports an overhead power transmission line located above Line, and a new aerial via the circle pulley wheel of the suspension pulley A schematic perspective view showing a state in which a new overhead ground wire is extended between steel towers with the wire suspended, (e) gives a predetermined tension to the new overhead ground wire, and the new overhead ground wire is a pair of left and right main lines It is a schematic perspective view which shows the state located above an upper line position. It is a side view which shows the state before implementation of the replacement of the existing overhead ground wire in a conventional construction method. Side view showing a state in which a self-propelled aircraft that has been placed on an existing overhead ground wire is run and a pilot rope is deployed in the entire re-exposed section of an existing overhead ground wire via a plurality of single-wheeled gold wheels in a conventional construction method It is. In the conventional construction method, the rear end of the pilot rope and the coasting rope / extended wire rope of the suspension car are connected via a joint part, and the pilot rope is wound up to connect the suspension car to the entire tension of the existing overhead ground wire. It is a side view which shows the state arrange | positioned at a spare area. It is a front view which shows the structure of the hanging wheel used in the conventional construction method. In the conventional method, the newly installed overhead ground wire and the end of the extended rope are connected, the existing overhead ground wire is used as a support line, the extended rope is wound up, and the newly installed overhead ground wire is extended to the entire replacement section. It is a side view which shows the state which exists. In the conventional method, the existing overhead ground wire is located above and the existing overhead ground wire is located below, and the existing overhead ground wire and the extension rope are connected via the joint, and the extension rope is wound up and installed. It is a side view which shows the state which has removed the imaginary ground wire. Side view showing a state where all the suspension wheels are collected by winding the coasting rope while applying brakes to the suspension wheel and connecting the suspension wire and the suspension rope to the brake in the conventional method. It is.

Explanation of symbols

P: Existing overhead ground wire Q: New overhead ground wire R: Overhead power transmission line T1 ... Steel tower T2 ... Steel tower T3 ... Steel tower S ... Joint part 1 ... Suspension pulley 2 ... Circle metal wheel 2A ... Roller 2B ... Bearing 2C ... Eye bolt 3A ... Suspension rope 3B ... Suspension rope 4 ... Hinge part 4a ... Shaft part 5 ... Clasp part 5a ... Protrusion 5b ... Locking groove part 5c ... Locked piece 5d ... Engaging groove 6 ... Handle 7 ... Mounting hole V ... Self-propelled machine D ... Drum W ... Brake E ... Take-up device L1 ... Pilot rope L2 ... Laying rope L3 ... Rope wire 11 ... Suspension wheel 11A ... Upper gold wheel 11B ... Lower gold wheel 12 ... Connecting member 12A ... Rope stopper 13 ... single wheel type gold wheel

Claims (9)

  An overhead ground wire replacement method that replaces existing overhead ground wires installed between multiple steel towers with newly installed overhead ground wires, and suspended pulleys at the planned location of existing overhead ground wires when the overhead power transmission line is stopped The installation process of the suspension pulley device, which attaches the circle gold wheel that is the device and secures the pair of suspension ropes extending from the circle wire wheel to the pair of left and right main lines of the overhead power transmission line, and the existing overhead ground wire After the tension is lowered and the existing overhead ground wire is suspended from the overhead power transmission line, the existing overhead ground wire is replaced with a new overhead ground wire, and after the extension of the new overhead ground wire is completed, An aerial ground wire replacement method characterized by comprising a step of tensioning a newly installed overhead ground wire and a step of recovering a suspended pulley device.   In the suspension pulley installation process, one worker is simultaneously loaded on each of the two overhead power transmission lines at the top of each tower, and the circle gold wheel passing through the existing overhead ground line is coasted with a pair of suspension ropes. The overhead ground wire replacement method according to claim 1, comprising a step and a step of securing a suspension rope to each of the overhead power transmission lines after moving the circle gold wheel to the planned location of placement.   The step of attaching the suspension pulley device includes a step of coasting a plurality of circle metal wheels passing through an existing overhead ground wire with a pair of suspension ropes, and a plurality of circle metal wheels moved to a planned location, and then an overhead power transmission line The overhead ground wire replacement method according to claim 1, further comprising a step of securing a hanging rope to each of the two.   The step of replacing the existing overhead ground wire with a new overhead ground wire includes the step of connecting the existing overhead ground wire and the new overhead ground wire via a joint portion, winding the existing overhead ground wire with an overhead wire winch, The overhead ground wire replacement method according to any one of claims 1 to 3, including a step of removing the existing overhead ground wire and simultaneously extending the new overhead ground wire.   The overhead ground wire replacement method according to any one of claims 1 to 4, wherein the step of collecting the suspended pulley device is a method in which an operator starts again on the main line of the overhead power transmission line and collects the suspended pulley device. .   A suspension pulley device used to replace an existing overhead ground wire installed between a plurality of steel towers with a newly installed overhead ground wire, and a ring metal wheel formed in an annular shape so as to be attached to the existing overhead ground wire; , Used in overhead ground wire replacement method, characterized in that it consists of a pair of suspension ropes, the base end of which is secured to a circle metal wheel, and the distal end of which is secured to each of the two overhead power transmission lines Hanging pulley device.   The circle pulley is a suspension pulley device used in the overhead ground wire replacement method according to claim 6, wherein a plurality of rollers are connected in a ring shape through bearings.   The suspension pulley apparatus used in the overhead ground wire replacement method according to claim 6 or 7, wherein a predetermined part of the circle gold wheel can be opened and closed.   The suspension pulley apparatus according to claim 8, wherein the circle gold wheel is configured such that one side of a pair of bearings supporting a roller is rotatable via a hinge, and the other side of the bearing is fixed by a clasp.

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