JP5597483B2 - Transfer method for existing large-diameter wires - Google Patents

Description

  This invention transfers the existing electric wire suspended on the steel tower, cuts it on the destination tower, and tightens each cut end and keeps it on the destination tower. The present invention relates to a method for transferring a large-diameter existing electric wire by the prefabricated and camares method.

  The normal transfer work is to attach a cam along (a jig used to grip the wire and pull it up to a predetermined slack) to the end of the existing wire, transfer the wire using the cam along, and tighten the wire. After determining the sag, cut the wire to the specified sag and tension, attach the clamp to the end of the wire, compress the clamp and attach one end to the armrest of the steel tower. Installation is completed.

However, if the transfer work of a 1520 mm ² thick wire adopted in recent years is carried out by the above-mentioned normal method, the tight tension becomes high, so the cam along that grips the wire at the time of tight connection is the rigidity of the wire. As a result, there is a possibility that the wire will rotate and will not return to its original state, and the wire of the electric wire may be damaged or cut near the cam along, which makes it difficult to transfer using the cam along.

  Normally, in the overhead wire method, as shown in Patent Document 1, the camares method adopted in the prefabricated overhead wire as a method that does not use cam-along (instead of cam-along, a camares fitting is attached to a special parallel clevis link at the end of the compression clamp However, it is necessary to cut the wire at an appropriate position in advance and perform clamp compression.

  A prefabricated overhead wire is a construction method that, as shown in Patent Document 2, an electric wire having a specified sag length is made on the ground in advance, and is simply attached to the insulator string to complete the wire drawing / tightening. It is. Specifically, the span length between the wire retainings and the height difference of the support points are measured in advance, and the wire length corresponding to each span is accurately calculated. On the basis of this calculation, either a measuring instrument with markings at the same time as the manufacture of the electric wire is carried to the site, or a measuring instrument is cut and the electric wire is cut, and a tension clamp is compressed and attached to both ends. Carry in.

  In the former case, at the overhead line site, the wire after the correction scale is cut at the time of wire drawing, and after the retaining clamp attached to the wire is compressed on the ground, the wire is drawn and attached to the insulator. In the latter case, after carrying in, the wire is extended to a predetermined section, and the tension clamps attached to both ends are peeled off and attached in series. The camares bracket is used when the retention clamp is attached to the chain.

Japanese Patent No. 3200559 JP-A-6-217430

However, in the transfer work of existing wires with a large diameter of 1520 mm ² or the like, there is a risk of damaging the wires when they are tightened as described above, so the cam along cannot be used and is wired in the air. Since it is in a state, like a prefabricated overhead wire, it is not possible to measure the length of the wire on the ground and cut it, compress the clamp, and attach the clamp to the wire cut end.

  In view of this, the present invention focuses on the Camares method adopted for prefabricated wires in order to ensure the transfer work of existing large-diameter wires, and the current support point position and wire shape (sag) are determined in advance. By measuring and calculating the actual length of the wire based on the measurement result, on-site measurement and prefabricated tower pre-fabrication in which the wire is cut and clamp compressed in advance on the tower to which the wire is transferred before the wire is connected, and the wire is connected using the Camares method. And it aims at providing the transfer method of the existing electric wire of a large diameter by the Kamares method.

The invention according to claim 1 is a transfer method in which a large-diameter electric wire supported between two steel towers is transferred to a new steel tower provided between the steel towers, and the new steel tower supports the electric wires. Measure the actual length of the wire including the slackness of the wire between the support points of the new tower from one of the towers, mark the location on the wire, and attach the tension clamp connected to one end of the wire to the other The tension clamp is separated from the insulators provided on the steel tower, and the tension clamp is connected to one end of a special parallel clevis link formed by standing two plates in parallel at the center of the horizontal yoke, and can be rotated only in the vertical direction. A semi-set is provided substantially horizontally between both ends of the horizontal yoke and both ends of the horizontally long horizontal yoke connected to the insulator of the one steel tower. The tension clamp, the special parallel clevis link and the horizontal yoke are Connected to prevent mutual rotation , Or feeding the semi set of wires, by pulling, feeding the wire to Utsurisen, shall be able to or緊線, while draws the wire between the towers, towers of the newly the wire On the scaffolding provided near the support point of the new steel tower, cut the marking part of the wire, attach a tension clamp to the cut end, and This is compressed and fixed, the tension clamp is attached to a newly installed steel tower, the semi-assembled wire is pulled from the steel tower to return the electric wire, and the wire is tightened. A transfer method for a large-diameter existing electric wire in which the tension clamp is attached to the insulator series.

  Further, the invention of claim 2 is the invention of claim 1, wherein the measurement of the actual length of the electric wire between the new steel tower from the one steel tower is carried out by removing the attachment of the electric wire, At the actual wire length prediction location starting from the steel tower, attach a plurality of measurement target hardware, measure the position of each measurement target hardware from the ground, only the measurement target hardware is mounted, The actual wire length from one steel tower between the steel towers was calculated based on the length from each measurement target hardware, and this was marked as a cutting position, and this was a transfer method for existing large-diameter electric wires.

According to the first aspect of the present invention, in the transfer work for existing wires with a large diameter of 1520 mm ² or the like, the wires are tightened by the Camares method, so that the wires with a large diameter can be easily connected without rotating. Moreover, after measuring the actual length of one of the existing wires from the one tower to the support point of the new tower and determining the cutting location of the wire, the wires were transferred to the new tower location, and the new tower Since the cutting and the compression of the tension clamp are performed above, the transfer work can be performed smoothly and easily.
In addition, the ends and cut ends of each steel tower of a large-diameter existing wire are connected with tension clamps, and the horizontal horizontal yokes are installed in both ends of the horizontal horizontal yoke via a special parallel clevis link and the steel tower insulator series. Since the electric wire is drawn out by a semi-assembled wire provided between both ends of the yoke or pulled and tightened, the electric wire does not always lose a fixed posture and is not twisted. This is a semi-assembled assembly in which a tension clamp, a special parallel clevis link and a horizontal yoke are connected so as not to rotate with each other, and a gold wheel is provided at each end of the horizontal yoke connected to the horizontal yoke. Therefore, even if a force that twists a rigid large-diameter electric wire with a tension clamp attached is generated, it is blocked by the horizontal semi-set configuration provided via the gold wheels at both ends of the horizontal yoke, I can't twist it. Therefore, it is possible to perform transfer and close without damaging or damaging the large-diameter wire.

  Further, according to the invention of claim 2, the attached items such as the SR ring (difficult snow ring) and CW (counterweight) are removed, and the current wire support point position and the slackness are confirmed in advance. Attach the target hardware for surveying near the calculated predicted cutting position of the wire, apply light from the ground to each of these target hardware for surveying, check the position of each target hardware for surveying from the reflected light, Since the actual length from one of the steel towers is confirmed in what direction from each of these surveying target hardwares, and this is used as a cutting point, the measurement is extremely accurate.

  The present invention relates to a transfer method in which a large-diameter existing electric wire supported between two steel towers is transferred to a new steel tower provided between the steel towers, and the new steel tower supports the electric wires. From the steel tower, measure the actual length of the wire including the slackness of the wire between the new steel tower support points, mark the location of the wire, and provide the steel tower with a tension clamp connected to one end of the wire. The tension clamp is separated from the string, and is held in the center of the horizontally long horizontal yoke, and a semi-set is provided between both ends of the horizontal yoke and both ends of the horizontal yoke provided in the insulator series. While drawing out and pulling the wire between the towers, the wire was transferred to the support point of the new tower, and the marking part of the wire was cut on the scaffolding provided near the support point of the new tower And tension at the cut end Mount the lamp, compress and fix it with a compressor, attach the tension clamp to the newly installed tower, pull the semi-set wire from the one tower, and return the wire, And it was set as the transfer method of the existing large diameter electric wire which tightens and attaches the said tension clamp to the insulator series of said one steel tower.

  Thereby, the existing large diameter electric wire can be safely and easily transferred to the new steel tower.

  Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view showing an overhead line situation of an existing steel tower and a new steel tower to which the transfer method of the present invention is applied, and FIG. 2 shows a state in which the target metal for surveying is attached to an electric wire in the transfer method of the present invention. Schematic explanatory diagram, FIG. 3 is a schematic explanatory diagram for marking a cut portion of an electric wire in the transfer method according to the present invention, and FIG. 4 is a side view showing a state in which the electric wire in the transfer method according to the present invention is supported on a bus by a suspension wheel. FIG. 5 is a plan view showing a busbar or electric wire tightening method in the transfer method of the present invention, FIG. 6 is a plan view showing a temporary holding state of the busbar in the transfer method of the present invention, and FIG. The schematic side view which shows the state which transfers the electric wire in a wire construction method to a new steel tower, FIG. 8 is the detailed drawing of FIG. 7, FIG. 9 is the state which retained the wire transferred in the wire construction method of this invention on the new steel tower FIG. 10 is a schematic side view showing FIG. 11 is a schematic plan view showing a state where a wire is cut and a tension clamp is compressed on this scaffold for a new steel tower in the transfer method of the present invention, and FIG. 12 is a transfer method of the present invention. It is a schematic side view which shows the state which completed.

First, as shown in FIG. 1, a transmission line (electric wire D) is supported over a plurality of steel towers T1 to T5. A new steel tower Tn is provided between the steel towers T2 and T3, and an electric wire D between the steel towers T2 and T3 is provided to branch the electric wire from the new steel tower Tn and supply electric power to the power consumers. Will be transferred to the new tower Tn. The electric wire D is a 1520 mm ² thick electric wire.

  When the new steel tower Tn is constructed, an operator rides on the air hoist and removes a snow ring attached to the outer periphery of the electric wire D or an attachment such as a counterweight, and either the steel tower T2 or the other steel tower Tn is removed. The distance from the tower T3 to the new tower Tn is calculated, and the distance corresponding to the distance from the current support point expected to be supported by the new tower Tn as shown in FIG. Attach the target hardware 1 for surveying in three places. As shown in FIG. 13, the surveying target hardware 1 has a plate body fixed to both ends of a U-bolt, and a target is provided on the plate body.

  Then, the wire sag and the distance between the support points in a state where there is no attachment on the wire D are measured, and the actual wire actual length is calculated. In addition, the distance between the steel towers T2 and T3 and the new steel tower Tn and the length of the wire including the slackness from the support point are measured, and the position of the measurement target hardware 1 is irradiated with light from the ground. A distance measuring instrument is used for surveying, and as shown in FIG. 3, calculating in which direction and how many cm from each surveying target hardware 1 is marked as a cut portion C.

  Then, as shown in FIG. 4, in order to suppress the drooping of the electric wire with low tension, the electric wire D to be transferred and the electric wire located above the electric wire D to be transferred are set as the bus D1, and the bus D1 and the electric wire The suspension wheel 2 is hung between the wire D and the electric wire D can be supported by the bus D1. In FIG. 1, the suspension wheel 2 is suspended from the tower T1 to the tower T5 except between the tower T2 and the tower T3.

  Then, the holding of the bus bar D1 of the tower T1 and the tower T5 is removed, and the other end of the special parallel clevis link 4 connected to the end of the tension clamp 3 is connected to the center of the horizontally long horizontal yoke 5 as shown in FIG. A gold wheel between the both ends of the horizontal yoke 5 and the ends of the horizontally long horizontal yoke 7 provided at the tip of the steel frame 6 supported by the steel tower T1 or T5. 8 is provided so that the horizontal yoke 5, the special parallel clevis link 4 and the tension clamp 3 do not rotate.

  Therefore, as shown in FIG. 1, the bus bar D1 is inserted between the steel towers T2 and T3 from the steel towers T1 and T5 side. For this purpose, the wires 8a of the semi-sets 8 are fed out. Thereafter, both ends of the bus D1 are temporarily secured as shown in FIG. In this temporary holding, the tension is adjusted by interposing a turnbuckle 9.

  On the other hand, the electric wire D suspended from the bus bar D1 is also removed from the insulator series of the steel tower T1 and the steel tower T5, and the special parallel connected to the end of the tension clamp 3 as shown in FIG. The other end of the clevis link 4 is connected to the central portion of the horizontally long horizontal yoke 5, and the horizontally long horizontal yoke 7 provided at both ends of the horizontal yoke 5 and the tip of the insulator 6 supported by the steel tower T 1 or T 5. A gold wheel is provided between both ends and the semi-assembly 8 is provided substantially horizontally so that the horizontal yoke 5, the special parallel clevis link 4 and the tension clamp 3 do not rotate. Then, the wire 8a of the semi-assembly 8 is drawn out, and the electric wire D is inserted between the steel tower T2 and the steel tower T3 as shown in FIG.

  In this manner, as shown in FIG. 7, the electric wire D is transferred to a newly installed steel tower Tn between the steel tower T2 and the steel tower T3. In this transfer, as shown in FIG. 8, the gold wheel 10 is placed on the electric wire D, and the gold wheel 10 is pulled downward by the wire 11 to be lowered.

  Then, as shown in FIG. 9, after the electric wire D is transferred to the new steel tower Tn, as shown in FIG. 10, the cam along 12 is hit on the electric wires D on both sides in the vicinity of the steel tower Tn. 13 is set, and a double protection cam along 14 is hit outside the cam along 12 and a double protection is provided with a wire 15. At that time, in order to prevent the rotation of the cam along 12, the screw anchor 16 may be driven into the ground and the wire 17 may be hung between the screw anchor 16 and the cam along 12.

  In this manner, the semi-wire 13 is wound, the electric wire D is played, and two cutting points of several centimeters are cut from each surveying target hardware 1 on the scaffold 18 (see FIG. 11) provided in the new steel tower Tn. Mark and cut at each marking location. Further, the tension clamps 3 are attached to the cut ends of the electric wires D, and as shown in FIG. 11, the tension clamps 3 are compressed by the compressor 19 placed on the scaffold 18, and the ends of the electric wires D are The tension clamps 3 are connected to the series 20 via yokes, which are fixed to the steel tower Tn. Thereafter, the semi-wire 13, the cam along 12 and 14, the wires 15 and 17, the screw anchor 16 and the like are removed.

  And in the said steel tower T1 and the steel tower T5, the wire 8a of each said semi-assembly 8 which has kept the electric wire D is wound up, and the electric wire D is returned to the steel tower T1 and the steel tower T5 side. Further, considering the slackness, the wire 8a of each semi-assembly 8 is wound up, and the tension clamp 3 at each end of the electric wire D is connected to the insulator 6 of the steel tower T1 and the steel tower T5 via the yoke 7. In this way, the transfer of the electric wire D to the steel tower Tn is completed as shown in FIG.

  FIG. 13 is a perspective view showing a state in which the surveying target metal fitting 1 is attached to the electric wire D. FIG. 14 is a perspective view showing the configuration of the horizontal yoke 5 and the special parallel clevis link 4 of FIG.

  As described above, the present invention is a method for transferring an existing large-diameter wire to a new steel tower, and the actual wire length including the slackness of the wire transferred from one steel tower to the support point of the new steel tower. , Mark the location of the wire, transfer the wire to the new steel tower, cut the wire on the scaffold of the new steel tower, compress the tension clamp with a compressor at the cut end, Since it is fixed and the electric wire is tightened using the Camares method, the work is easy and the existing electric wire is not damaged.

It is a schematic side view which shows the overhead wire condition of the existing steel tower and the new steel tower which apply the transfer method of this invention. It is a schematic explanatory drawing which shows the state which attached the target metal object for surveying in the wire transfer method of this invention to the electric wire. It is a schematic explanatory drawing which marks the cutting location of the electric wire in the transfer method of this invention. It is a side view which shows the state which supported the electric wire in the transfer method of this invention on the bus-bar with the suspension metal wheel. It is a top view which shows the bus-wire or electric wire tight-wire construction method in the transfer construction method of this invention. It is a top view which shows the temporary holding state of the bus-bar in the transfer method of this invention. It is a schematic side view which shows the state which transfers the electric wire to transfer in the transfer method of this invention to the newly installed steel tower. It is detail drawing which shows the state which transfers the electric wire to which it transfers in the transfer method of this invention to the new steel tower. It is a schematic side view which shows the state which fastened the transferred electric wire in the new steel tower in the transfer construction method of this invention. It is detail drawing of the state which fastened the transferred electric wire in the new construction tower in the transfer method of this invention. It is a schematic plan view which shows the state which cut | disconnects an electric wire and compresses a tension clamp to this with the scaffold of the new steel tower in the transfer method of this invention. It is a schematic side view which shows the state which the transfer method of this invention completed. It is a perspective view which shows the state which attached the target metal fitting for surveying to the electric wire in the transfer method of this invention. It is a perspective view which shows the structure of the horizontal yoke and special parallel clevis link of the wire-drawing tool used for the wire transfer method of this invention.

T1-T2 Steel tower Tn New steel tower D Electric wire D1 Bus C C Cut point
DESCRIPTION OF SYMBOLS 1 Surveying target metal fitting 2 Suspension wheel 3 Tensile clamp 4 Special parallel clevis link 5 Horizontal yoke 6 Insulator chain 7 Horizontal yoke 8 Semi assembly 9 Turnbuckle 10 Metal wheel 11 Wire 12 Cam along 13 Semi wire 14 Cam along 15 Wire 16 Screw anchor 17 Wire 18 Scaffolding 19 Compressor 20 Insulator chain

Claims (2)

In the transfer method of transferring a large-diameter electric wire supported between two steel towers to a new steel tower provided between the steel towers, and supporting the electric wires on a new steel tower,
From one steel tower, measure the actual length of the wire including the slackness of the wire between the new steel tower support points, mark the location on the wire, and attach the tension clamp connected to one end of the wire to the other steel tower. Separated from the chain
The tension clamp is connected to one end of a special parallel clevis link formed by standing two plates parallel to each other at the center of a horizontal yoke, and is rotatably connected only in the vertical direction.
A semi-set is provided approximately horizontally between both ends of the horizontal yoke and both ends of the horizontally long horizontal yoke connected to the insulator of the one steel tower. The tension clamp, the special parallel clevis link and the horizontal yoke are mutually connected. It is connected so as not to rotate, and by drawing out or pulling the semi-assembled wire, the wire to be transferred can be drawn out or tightened,
While draws the wire between the towers, and Utsurisen the electric wire supporting point portion of the steel tower of the new, on a scaffold provided near the support points locations of towers of the new, cut marking portion of the wire Then, a tension clamp is attached to the cut end, and this is compressed and fixed with a compressor, and the tension clamp is attached to a newly installed tower, and the semi-assembled wire is attached from the tower. A method of transferring a large-diameter existing electric wire, wherein the wire is returned by pulling and tightly connected, and the tension clamp is attached to the insulator series of the one steel tower. The measurement of the actual wire length between the new steel tower from the one steel tower removes the attachment of the electric wire, and a plurality of target hardwares for measurement are provided at the predicted actual wire length between the steel towers starting from one steel tower. , And measure the position of each measurement target hardware from the ground of the electric wire on which only the measurement target hardware is mounted, and measure the actual length of the electric wire from one steel tower between the steel towers for each measurement. The transfer method for a large-diameter existing electric wire according to claim 1 , wherein the method calculates the length from the target hardware and uses it as a cutting point for marking.

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