JP2005333789A - Construction method of hanging sheave type line shifting by forming net - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inhibit dangling or rolling of an electric wire and enable safe working, when the electric wire (a ground wire, a power line) installed between paths of existing steel towers is shifted to a steel tower located sideways which is formed newly or temporarily. <P>SOLUTION: In a construction method of hanging sheave type line shifting by forming a net, support bus lines have support ropes and coupling ropes, comprising a light and tough Kevlar (R) and mounted to the predetermined number of the hanging sheave at regular intervals, are stretched between the new and old paths of source and destination steel towers from the existing steel tower into a V-shape, bridging ropes comprising Kevlar and coupling the hanging sheave mounted to the both coupling ropes are provided laterally between the both supporting ropes. The rope net is constituted by the hanging sheave are mounted separately via the bridge ropes, and the electric wire suspended through the bridging ropes is moved horizontally. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for transferring and replacing an electric wire (an overhead ground wire and a power line) stretched between existing steel towers to a new or temporary steel tower located on the side of the existing steel tower. The present invention relates to a relocation method that suppresses fluctuations in the sag of an electric wire that occurs during wiring.

  As a known technique related to the conventional transfer method, generally, the tip of the transfer wire to which the dividing line is connected after the wire stretched between both diameters in the transfer source steel tower is retained in the tower body and cut. As shown in FIG. 10, a Camalong is attached to the part and the electric wire is gripped, and two sets of semi-gold cars are connected to the Camalong, and the transfer wire rope fed from the transfer source and transfer destination tower is connected. In addition, there is a construction method in which an electric wire is transferred in the air by “exchange” of both wires.

  In addition, as shown in FIG. 11, a main wire is stretched between the transfer source tower and the transfer destination steel tower, a movable two-wheel pulley is hung on the wire, and the overhead wire gold wheel that suspends the electric wire on the pulley is provided. Move the two-wheel pulley of the suspended transfer device to the transfer destination and transfer the electric wire. First, the wires attached to the upper part of the tower are transferred to the lower part in order, and the upper line to the lower line are transferred. There is a “slide transfer method”.

In addition, as shown in FIG. 12, a wire is being transferred by a transport device in which a main rope stretched between the transfer source and the top of the transfer destination tower is hung, and a overhead wire wheel is hung on the main rope. In addition to transferring the main line to the underline without changing the main rope, it is also possible to transfer the work while adjusting the drooping of the hoist, as well as the construction equipment (arm material, overhead wire material) by the suspended transport device In other words, an “electric wire transfer method” is disclosed that can perform unloading and unloading operations of tools, etc.) in parallel.
JP-A-11-205928 JP 2003-180009 A

  However, the general construction method shown in FIG. 10 requires a delicate operation skill in the “exchange” of the two wire ropes drawn out from the transfer source and transfer destination towers in order to prevent the series of wires inserted with the dividing line from drooping. Since it is difficult to perform the transfer work safely unless it is a skilled person, there are problems in workability such as installation of protective scaffolding and nets as well as the installation of a large number of observers as security measures for the line.

  In addition, the “slide transfer method” using the transfer device of FIG. 11 is also a device that cannot displace the wire being transferred suspended on the overhead wire wheel vertically (in the vertical direction), so that the actual length of the wire is increased and supported. Since it is difficult to suppress the increase phenomenon of wire sag that occurs when the point height difference is large, the sag is controlled while the auxiliary wire rope fed from the transfer source and transfer destination towers is used to suppress sag. As measures to avoid the approach and contact with the overlying workpiece under the line of the cable to be inserted, safety measures such as the installation of a protective net or a scaffold under the line were necessary, and there was a problem in the safety of the work.

  In addition, in the “wire transfer method” using the carrier shown in FIG. 12, by using a carrier (carrier) to suppress the fluctuation (displacement in the vertical direction) of the sag of the wire during the transfer, Although the problem of "exchange" operation with auxiliary wires and underline security measures (construction of protection nets, scaffolding, etc.) has been solved, the displacement status of the wires being transferred is monitored, and the linkage work between the operation and operation with the winch is accurately performed. In addition, the transfer wire is moved while being displaced up and down in the state where the middle part of a series of long wires connected between the two diameters is suspended (supported at one point) by an overhead wire metal wheel. If a crosswind occurs during the transfer, it is expected that the swaying of the wires will be uneven and the sag of the diameters of the transferred wires will be uneven (the wires will flow and hang down between the long diameters). Although it is a perfect transfer method such as the possibility of approaching the workpiece There.

  The problem to be solved by the present invention is to investigate the countermeasures related to the sag of the wire during the transfer in the conventional transfer method, and to solve this drastically, and to protect the safety facility under the line In addition, in the unlikely event that a strong wind is generated during the transfer work, or if an unexpected situation such as a broken wire or an operational error occurs, the suspended wire will sway, slide or drop. This is to establish a construction method that can be transferred safely and surely without having to do so.

  As means for solving the above problems, (1) a rope for suspending an electric wire uses a light and strong kevlar. (2) After the electric wire is cut off at the main transfer tower and temporarily fixed, the electric wire is suspended (supported) on a suspension wheel suspended at equal intervals, and then transferred. (3) A bus bar (support rope, connecting rope, and suspension wheel) for supporting the electric wire is stretched between the diameters of the transfer tower and the transfer destination tower from the existing tower. (4) A bridge rope for connecting the suspension wheels suspended by the connection rope to the support ropes of both bus bars is installed horizontally. (5) A suspension net for linking the suspension wheel of both buses and the suspension wheel for suspending the electric wire by a bridge rope is formed. (6) Tensioning both supporting buses to relieve the horizontal tension of the electric wires suspended on the hanging wheel suspended at equal intervals. (7) Connect the wire fed from the transfer source tower and the transfer destination tower to the metal fitting for holding the electric wire, move the electric wire horizontally along the bridge rope, and draw it toward the transfer destination tower side. (8) The main technique is to connect the increment (secant) of the actual wire length on the transfer tower.

  Since the construction method of the present invention does not insert the dividing line before the transfer, and connects the required length of the electric wire at the transfer destination, the phenomenon of increasing the sag caused by the increase in the actual length of the electric wire accompanying the transfer is suppressed.

  A large number of suspension wheels suspended from the support bus between the two diameters and a suspension wheel for suspending the wires are arranged at equal intervals and the bridge ropes are linked so that the support distance of the wires is evenly distributed. (Between the short diameters), the horizontal tension of the electric wire is relaxed, and the drooping of the electric wire between the suspension wheels is suppressed (small sag).

  Because the net to be stretched between both diameters consists of a lightweight, tough Kevlar rope support bus (4) and a horizontal bridge rope (1), the load load between the spans Is small and has a dual protective role. Even if a problem such as a broken rope or a crosswind or an operation error occurs during the transfer of the wire, an unforeseen situation such as a sideways swing, drooping or slipping of the wire may occur. Because it does not occur, it is rich in safety.

  This eliminates the need for constructing temporary facilities such as protective scaffolds and protective nets to prevent contact and contact with laterally overworked workpieces below the line between the relocation spans, thereby reducing local environmental costs.

  The materials and tools used to form the suspension net are all conventional products, and it is economical and environmentally friendly because there is no need to make and use special materials and tools for this method. It has many advantages and effects, such as contributing to a significant reduction in total construction costs.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 2 to 5 show the outline of the technique and procedure of the transfer method of span cable in the overhead power transmission line. When transferring, the suspension of the installed cable at both ends of the transfer section and the transfer main tower After disconnecting and temporarily securing the wire at

  As shown in FIG. 2 (a), on the transfer main tower 2 side, a self-propelled machine is set on the wire 3 between the diameters on the existing tower 1 side, and the coasting rope 7 is connected to this, and the required number of suspension wheels 10 ( FIG. 6) is pulled to suspend the suspension wheel 10 between the diameters at equal intervals.

  As shown in FIG. 2 (b), the connecting rope 4 and the support rope 5 are connected to the suspension wheel 10 at the end of the coasting rope 7, and the required number of parallel metal wheels 8 (the annular metal wheel 9 in FIG. 9). Are connected in parallel to each other, and are attached to one annular metal wheel 9 with a connection rope 4 suspended from the electric wire 3 and supported on the other annular metal wheel 9 by a support rope 5. Is suspended at equal intervals between the diameters.

  As shown in FIG. 2C, the connection rope 4 and the support rope 5 connected to the end parallel metal wheel 8 suspended between the diameters are moved to the transfer steel tower 2 side, and the support rope is moved. -The loop 5 is stretched and fixed on the transfer tower 20 side, and the coasting rope 7 is connected to the terminal parallel metal wheel 8 on the transfer tower 2 side, and the required number of suspension cars 10 are connected thereto. Attached and suspended on the electric wire 3.

  As shown in FIG. 2 (d), the connecting rope 4 and the support rope 5 connected to the parallel gold wheel 8 suspended between the spans on the existing tower 1 side are pulled and moved while the gold wheel 8 is recovered. An annular metal wheel 9 attached to the connecting rope 4 is disposed between the diameters of the wire tip tower 20 via the support rope 5 and the coasting rope 7 via the wire 3 from the transfer main tower 2 side. A required number of suspension wheels 10 to be mounted on are suspended between the spans at equal intervals.

  As shown in FIG. 2 (e), the rope 4 connected to the terminal suspension wheel 10 on the transfer main tower 2 side while pulling the coasting rope 7 on the existing steel tower 1 side to collect the suspension wheel 4 And a supporting rope 5 are connected, and a parallel metal wheel 8 mounted on the wire 3 is hung on the electric wire 3, and the same number of metal wheels 8 are arranged at equal intervals between the diameters, and the supporting rope 5 is already provided. I get nervous at the tower 1.

  FIG. 2 (f) collects the parallel metal wheel 8 on the existing steel tower 1 side, connects the connecting rope 4 and the support rope 5 to the terminal metal wheel 8, and connects the required number of annular metal wheels 9 to this. After mounting at intervals and disposing the span, the support rope 5 is tensioned and fixed by the existing tower 1 and the transfer destination tower 20.

  As shown in FIG. 2 (g), each is attached to the connecting rope 4 via a support rope 5 stretched between both diameters of the existing steel tower 1, the transfer main tower 2 and the transfer destination steel tower 20. Annular wheel 9 is hung between both diameters at the required number and at equal intervals, and a support bus 55 comprising a support rope 5, a connecting rope 4, and an annular wheel 9 is stretched in a V shape. To do.

  As shown in FIG. 2 (h) and FIG. 3, the annular metal wheel 9 attached to the connecting rope 4 of the support bus 55 stretched between both diameters on the existing tower 1 side is connected and suspended from the electric wire 3. Since the bridge rope 6 connecting the supporting buses 55 through the right angle metal wheel 88 (the eight-shaped two-wheel metal wheel in which 92 annular metal wheels in FIG. The connecting ropes 4 are alternately drawn on the source 2 and the transfer destination tower 20 side.

  As shown in FIG. 2 (i), the supporting buses between the two diameters at the same number of bridge ropes 6 are drawn while pulling the connecting ropes 4 alternately on the transfer master tower 2 and the transfer destination tower 20 side. 55, the connecting rope 4 is fixed with a steel tower between both diameters, and the wire 3 is suspended by a right angle metal wheel 88 and supported by a Kevlar rope 5 comprising four wires. -Form a pnet.

  As shown in FIG. 4 and FIG. 2 (j), the tip of the electric wire 3 to be moved on the transfer main tower 2 side is held by a kamalong or clamp, and the electric wire 3 is suspended by the transfer wheel 11 for transfer. The electric wire 3 is moved horizontally through the bridge rope 6 by the mutual operation “exchange” of the wire 77 fed from the wire source 2 and the transfer destination steel tower 20.

  As for the transfer method for the multi-conductor transmission line, the suspension work of the suspension wheel 10 and the parallel suspension wheel 8 performed in (a) and (b) of the above (Example 1) is performed simultaneously on the two electric wires 3. For example, the suspending work of the suspension wheel 10 and the parallel metal wheel 8 drawn out from the transfer main tower 2 of (d) and (e) is omitted, and the support rod is transferred from the transfer main tower 2 of (f) following (c). If the annular gold wheel 9 attached to the loop 5 and the connecting rope 4 is disposed between the diameters, the same form as in (g) is obtained, and therefore the description regarding the subsequent steps is omitted.

The perspective view which shows the implementation aspect of the transfer method (net-type hanging type) of this invention. The technique aspect diagram which bridges a bridge rope between the bus-bars in the transfer method of this invention. The transfer electric wire suspension technique state figure by the bridge rope in the transfer method of this invention. The electric wire transfer technique mode diagram by the two-wheel metal wheel for transfer in the transfer method of this invention. (A)-(j) Explanatory drawing which shows the procedure of the technique in the transfer method of this invention. The front view of the hanging wheel used for the transfer method of the present invention. The side view and front view of the two-wheel metal wheel for transfer used for the transfer method of this invention. The front view of the right angle (8-shaped) gold wheel used for the transfer method of this invention. The front view and side view of a ring metal wheel used for the transfer method of the present invention. Fig. 2 is a diagram showing a state in which a wire is transferred by a "exchange" operation of a wire by a conventional transfer method. FIG. 3 is a diagram showing a state in which electric wires are transferred by a moving gold wheel device attached to a parent wire by a conventional transfer method. The perspective view which carries out an electric wire transfer by the carrier (carrier) hung on the main rope with the conventional transfer method.

Explanation of symbols

1 Existing steel tower 10 Suspension wheel (single wheel)
2 Transfer main tower 20 Transfer destination tower (new or temporary)
3 Electric wire 4 Connection loop (Kevlar)
5 Support Loop (Kevlar) 55 Support Bus (Kevlar, Article 2)
6 Bridge rope (Kevlar)
7 coasting rope (nylon) 77 wire (operation cord)
8 Parallel gold wheel (8-shaped, 2-wheel) 88 Right-angle gold wheel (8-shaped, 2-wheel)
9 Ring metal wheel

Claims (2)

In the construction method of moving an electric wire (single conductor) installed between the tower diameters of an existing transmission line to a new or temporary tower located on the side of the existing tower, the flow of the electric wire at both ends of the transfer section and the source of the transfer After preparatory work such as disconnecting and temporarily fixing the wires on the steel tower, set the self-propelled machine on the wire between the spans on the side of the transfer tower (a) -Connect the hooks and pull the required number of suspension wheels and suspend the suspension wheels between the spans at equal intervals. (B) A connecting rod consisting of a lightweight and strong kevlar on the suspended suspension wheels. -Connect the loop and the support rope, and connect to this with the required number of parallel 8-shaped wheels (two annular wheels are connected in parallel and connected to one side and attached to the wire and suspended on the other side. (C) A metal wheel that passes through a support rope, and is suspended at equal intervals between the diameters. (C) A chain connected to the suspended parallel metal wheel. The connection rope and the support rope are moved to the transfer destination tower, and the support rope is tightened and fixed on the transfer destination tower side, and the coasting rope is fixed to the terminal parallel wheel on the transfer tower side. (D) Attach the connecting rope and the support rope of the parallel metal wheel suspended on the existing steel tower side. While collecting the gold wheel, arrange the ring-shaped metal wheel attached to the connecting rope from the transfer destination tower via the support rope and the required number of suspension cars on the electric wire from the transfer main tower. (E) Attach the coasting lop on the existing tower side and collect the suspension car while collecting the suspension car. (F) Existing steel towers are suspended by suspending parallel metal wheels mounted on the wires, arranging the same number of gold wheels between the spans at equal intervals, and tensioning the support loops with the existing steel towers. On the side After collecting the bank car and connecting the connecting rope and the support rope to the terminal car, the required number of ring metal wheels are mounted at equal intervals and arranged in the span, and then the support rope is installed. -Tighten and fix the loop between the existing tower and the transfer main tower (g) via a support loop stretched between both diameters of the existing tower, the transfer source and the transfer destination tower,
The required number of annular gold wheels mounted on each connecting rope are hung between both diameters at equal intervals.
A support bus consisting of a support rope, a connection rope, and an annular metal wheel is stretched in a V-shape. (H) Attached to a connection loop of a support bus stretched between both diameters on the existing steel tower side. Bridge wheel that connects between the supporting buses through a right-angled eight-shaped metal wheel (a two-wheeled metal wheel connected at right angles, called a right-angled metal wheel) that connects the two metal wheels and hangs the wires. In order to place the loops (kevlar) at regular intervals, draw the connecting ropes alternately on the transfer source and transfer destination tower side. (I) Connect the connection ropes on the transfer source and transfer destination tower side. -The required number of bridge ropes while pulling alternately,
After laying on the supporting bus between the two diameters at equal intervals, the connecting rope is fixed with a steel tower between the two diameters, the electric wire is suspended by a gold wheel, and the kevlar rope that supports the four kevlar ropes is supported. Forming the net (j) Holding the tip of the wire to be transferred on the transfer tower side with a kamalong or clamp and suspending the wire with a 2-wheel metal wheel for transfer, the transfer source and transfer destination To move the wires horizontally through the bridge rope by the “exchange” (winch) of the wire delivered from the tower (k) After the transfer of the wires to the destination tower is completed, connect the support buses of both support buses Pull the cable back to the existing tower and remove the right angle metal wheel and the bridge rope from the electric wire to complete the relocation (single wire). (L) When repositioning the electric wire, With the old wires suspended, connect and replace the new wires Tsukin formula Utsurisen method by net-shaped set, wherein etc.. In the method of moving the electric wire (double conductor) installed between the steel tower diameters of the existing power transmission line to a new or temporary steel tower located on the side of the existing steel tower, the removal of the spacers and the relocation section After the preparatory work such as the flow of the electric wire at both ends of the steel tower and the disconnection of the electric wire at the transfer main tower and temporary fixing, (a) the span on the transfer main tower side Set a self-propelled machine on the electric wire (inside and outside), connect two coasting ropes to it, pull the required number of suspension wheels, and suspend the suspension wheels on the two wires at equal intervals ( b) Connect the Kevlar connecting rope and the supporting rope to each suspension wheel suspended from the electric wire,
(C) A connecting rope and a supporting rope connected to a terminal parallel metal wheel suspended from the inner and outer electric wires. The connection rope and the support rope outside are moved to the transfer destination tower side, and the support rope is tensioned and fixed at the transfer destination and the existing steel tower side, and the connection rope is connected to the end of the connection rope separately. (D) To the end parallel metal wheel suspended from the inner wire, the required number of annular metal wheels attached to this are arranged at equal intervals through the support loop. Of the connected ropes and support ropes, the support ropes were tensioned and fixed at the transfer source and the existing tower, and attached to the end of the linkage rope. Install the required number of annular metal wheels at equal intervals across the span via the support loop. (E) The existing steel tower will be installed between the diameters of the transfer source and transfer destination towers. Was consolidated Russia - attracted a flop,
A V-shaped support bus is stretched by arranging the required number of annular metal wheels suspended between two diameters via two support ropes that are tensioned and fixed between both diameters. (F) Tensioning between the two diameters on the existing steel tower side while pulling alternately the connecting rope attached to the ring metal wheel suspended between both diameters at the transfer source and transfer destination steel tower side The required number of bridge loops are connected at equal intervals to connect the annular metal wheels attached to the connected support bus connecting loops and connect them between the supporting buses through a right angle metal wheel suspended from the outer wire. (G) Necessary number of bridge ropes while pulling connection ropes alternately at the transfer source and transfer destination towers,
After laying between the support buses of both diameters at equal intervals, the connection rope is fixed with a steel tower between both diameters, the wire is suspended by a gold wheel, and the kevlar rope that supports the suspension is composed of four pieces. Forming a gold net (h) Hold the tip of the outer wire on the side of the transfer main tower with a kamalong or clamp, and suspend the wire with a two-wheeled metal wheel for transfer, and transfer source and transfer (I) After the transfer of the outer wires to the transfer tower has been completed, connect the two supporting bus bars after the wires have been transferred horizontally through the bridge rope. Alternately pull the rope back to the existing tower, remove the right angle metal wheel and the bridge rope from the electric wire, change the right angle metal wheel and the bridge rope to the inner wire, and then relocate them at the source and destination steel towers. After pulling the connecting rope alternately,
(J) Complete the transfer of the multiconductor by transferring the inner wire using the technique and procedure according to the above (f) to (h). A wire-type transfer method using a net configuration, in which an old wire is suspended on a wire net, and a new wire is connected and pulled out.

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