JP2009027822A - Suspended jumper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suspended jumper device to reduce distortion in a jumper wire and prevent a break of the wire. <P>SOLUTION: The suspended jumper device 7 electrically connects transmission lines 1 anchored to a steel tower arm 6 through a tension insulator chain 4 and having a horizontal angle by a jumper wire 9. A long rigid pipe 8 is suspended from the steel tower arm 6 through a jumper suspending device and both ends of the rigid pipe 8 are bent toward the steel tower arm. The jumper wire 9 is fixed along the rigid pipe 8. The rigid pipe 8 may be configured of a single pipe member or combination of a horizontal pipe 12 and bent pipes 13 provided at both ends of the horizontal pipe 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a jumper device in an overhead power transmission line, and more particularly to a suspended jumper device that electrically connects between transmission lines having a horizontal angle held by a steel tower arm via a tension-resistant insulator string.

  In the transmission line, in the tower where the horizontal angle of the transmission line is large, the jumper line on the outer curve side approaches the tower body, so it is necessary to ensure sufficient clearance between the jumper line and the transmission line tower. . As a jumper device that secures such a clearance, for example, configurations shown in Patent Documents 1 and 2 described below are known.

  Among these, the jumper device shown in Patent Document 1 has a jumper wire electrically connected to a transmission line stretched through a tension insulator on the left and right sides of the tower arm on the left and right sides of the tower arm. It is supported by using a jumper suspension device, a long rigid material is provided between both jumper suspension devices, and a jumper wire is fixed along the rigid material. By adopting such a configuration, it is possible to prevent the jumper wire from loosening.

  In addition, the jumper device disclosed in Patent Document 2 hangs a rigid horizontal member via a hanging rod on a metal fitting such as a yoke between a tension insulator and a transmission line, and the jumper wire is attached to the horizontal member. It is intended to be attached.

The present applicant also uses a jumper device 7 as shown in FIG. 6 for a transmission line tower provided at a location where the horizontal angle of the transmission line is large. Below the tower arm 6 projecting from the side, an intermediate portion is supported by a single-hanging device 10 hanging from the tower arm 6 and provided between the tension insulator 4 and the transmission line 1. A long rigid pipe 8 supported at both ends by a support device 11 suspended from the yoke 3 is suspended, and a jumper wire 9 connected to the power transmission line 1 is kept at a predetermined distance between the jumper wires. In this manner, the rigid pipe 8 is attached via the spacer 21.
JP 2004-32874 A Japanese Utility Model Publication No. 60-51725

  However, the above-described rigid material is composed of straight H-shaped steel, iron pipes, or the like, but in any jumper device, a steel tower in which the horizontal angle of the transmission line becomes large (for example, a steel tower with a horizontal angle exceeding 60 degrees) 7), since the bending angle of the jumper wire supported along the rigid member (rigid pipe 8) near the end of the rigid member increases as shown in FIG. There is a possibility that the distortion generated in each part becomes large and the strands of the jumper wire 9 are cut.

  This invention is made | formed in view of the situation which concerns, and makes it the main subject to provide the suspension type jumper apparatus which can reduce the distortion which generate | occur | produces in a jumper wire and can prevent the disconnection of a strand.

  The present applicant provides a curved portion toward the pylon side at the end of the rigid material because the distortion of the jumper wire increases when the jumper wire attached to the rigid material is greatly bent near the end of the rigid material. As a result, the inventors have obtained the knowledge that it becomes possible to reduce the stress strain, thereby completing the present invention.

  That is, the suspension type jumper device according to the present invention is configured such that the power transmission line having a horizontal angle that is fastened to the tower arm via the tension insulator series is electrically connected by the jumper line. A long rigid material is suspended via a jumper suspension device, and both ends of the rigid material are bent toward the tower arm side, and the jumper wire is fixed along the rigid material. It is characterized by.

  Therefore, since the end of the rigid material is curved toward the tower arm side, there is no sudden change in the angle of the jumper wire in the vicinity of the curved end, and it is possible to reduce stress strain on the jumper wire. It becomes.

Here, the curved end portions of the rigid member may be formed integrally or may be constituted by another detachable member. In particular, when it is constituted by another detachable member, it can be retrofitted to an existing linear rigid material, and versatility can be given.
In order to increase the durability of the jumper wire, an armor rod may be attached to the portion of the jumper wire along the curved ends of the rigid material.

As the above-mentioned rigid material, for example, it may be configured by a pipe-like member in order to reduce weight, and may be configured by combining a horizontal pipe and bent pipes provided at both ends of the horizontal pipe. Good.
Further, when the rigid material is constituted by a pipe-like member, both ends may be closed with lids in order to prevent entry of birds or foreign matters. In the case of providing such a lid, it is preferable to form a water drain opening for draining water that has entered the pipe.

  As described above, according to the present invention, both ends of the rigid member suspended from the tower arm via the jumper suspension device are bent toward the tower arm side, and the jumper wire is fixed along the rigid member. As a result, it is possible to reduce the bending angle of the jumper wire near the curved end of the rigid material to reduce the distortion generated in the jumper wire, and to prevent disconnection of the strands. Become.

  In addition, not only when the jumper wire or jumper support device is stationary, but also when the jumper wire or jumper support device shakes, such as when galloping or wind is swaying, the distortion generated in the jumper wire is reduced and the It becomes possible to suppress disconnection.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the accompanying drawings.

  In FIG. 1, a front view of a suspended jumper device is shown, and a horizontal transmission line 1 is connected to a tower arm 6 extending from a tower body 5 via a tension clamp 2, a yoke 3, and a tension insulator 4. It is stretched. The suspension-type jumper device 7 includes a long rigid pipe 8 and a flexible jumper wire 9 electrically connected to the power transmission line 1 through the retention clamp 2. The intermediate portion is supported by a cantilever 10 suspended from a tower arm 6 and both ends are suspended by a yoke 3 between a tension-resistant insulator string 4 and a power transmission line 1 via a support device 11. It is attached below the arm 6.

As shown in FIG. 2, the rigid pipe 8 is configured by combining a horizontal pipe 12 and bent pipes 13 provided at both ends of the horizontal pipe 12, and in this example, the horizontal pipe 12 And flange portions 12a and 13a are formed at both ends of each of the bent pipe 13 and the flange portion 12a of the horizontal pipe 12 and the flange portion 13a of the bent pipe 13 are brought into contact with each other, and the flange portions 12a and 13a are bolted to each other. It is fixed by. The bent pipe 13 is fixed to the horizontal pipe 12 so as to bend toward the steel tower, and the free end not connected to the horizontal pipe 12 is bolted to the flange portion 13b of the bent pipe 13 with a flat lid 14. It is blocked by doing.
Reference numeral 15 denotes a single hanger connecting bracket for connecting the single hanger 10, and reference numeral 16 denotes a support device connecting bracket for connecting the support device 11.

As shown in FIG. 3, the lid body 14 is provided so as to close almost the entire opening end of the rigid pipe 8 (bent pipe 13). In this example, the lower portion of the opening end is opened. The upper portion from a position slightly above the lower end of the inner edge of the rigid pipe 8 (bent pipe 13) is closed so as to be in a state of being removed, and a drain opening 17 is provided below the free end of the rigid pipe 8 (bent pipe 13). Is forming. The drainage opening 17 has a size sufficient to prevent the entry of birds and foreign objects and to discharge the intruded water.

  The jumper wire 9 connects the left and right power transmission lines 1, and each jumper wire 9 is a jumper between the power transmission line 1 and the rigid pipe 8 so that the jumper wires are held at a predetermined interval. In addition to being juxtaposed via the spacer 20, the rigid pipe 8 is attached via a pipe jumper spacer 21. In this example, pipe jumper spacers 21 are attached at substantially equal intervals in several places including the vicinity of both ends of the horizontal pipe 12, and jumper spacers 21 are attached in the vicinity of the distal ends of the respective bent pipes 13.

  Accordingly, the jumper wire 9 is fixed along the rigid pipe 8 as shown in FIG. 1B, so that the portion along the horizontal pipe 12 is fixed linearly and along the bent pipe 13. The portion is fixed in a curved manner according to the shape of the pipe. For this reason, it is possible to reduce the bending angle of the jumper wire 9 in the vicinity of the curved end portion of the rigid pipe 8 (near the end portion of the bent pipe 13). It becomes possible to prevent disconnection of the wire.

  Moreover, not only when the jumper wire 9 or the jumper device is stationary, but also when the jumper wire 9 or the jumper device is shaken, such as when galloping or wind is swaying, the distortion generated in the jumper wire 9 is reduced. It becomes possible to suppress the wire breakage.

  Furthermore, since the end opening of the bent pipe 13 is closed by the lid body 14, it becomes possible to prevent the entry of birds and foreign objects. For example, the bird creates a nest inside the pipe and the inside of the pipe corrodes. There is no fear of it. Further, since the drainage opening 17 is formed at the lower part of the free end of the bent pipe 13, even when water enters the pipe, it can be surely discharged and the water stays inside. Disappears. In particular, when the rigid pipe 8 is inclined or when the bent pipe 13 is slightly below the horizontal pipe 12 due to its own weight, the water in the pipe is effectively discharged. Is possible.

  In the above configuration example, the bent pipe 13 is bolted as a separate body from the horizontal pipe 12, but the horizontal pipe 12 and the bent pipe 13 are integrally formed as shown in FIG. However, it may be configured by a single rigid pipe, or may be used in a state where the end of the bent pipe 13 is opened by removing the lid 14. Further, the horizontal pipe 12 may be configured by connecting divided pipe members.

  Moreover, in the above-described configuration example, an example in which a long rigid material is configured by the rigid pipe 8 in order to reduce weight, but a long rigid material such as a solid cylindrical material or H-shaped steel is used. The both end portions may be curved toward the steel tower. Even in such a configuration, the curved portion to be bent toward the steel tower may be formed integrally or separately.

  Furthermore, as shown in FIG. 5, an armor rod 22 is attached to a portion of the jumper wire along the curved ends of the rigid pipe 8, that is, a portion of the jumper wire 9 along the bent pipe 13. Stress reduction or damage at this portion may be prevented, and the durability of the jumper wire 9 may be increased.

1A and 1B are views showing a suspension type jumper device according to the present invention, FIG. 1A is a front view thereof, and FIG. 1B is a partial view showing a periphery of a bent pipe when FIG. It is an enlarged plan view. FIG. 2 is a view showing an example of a rigid pipe used in the suspension type jumper device of the present invention, (a) is a front view showing the whole, and (b) is a view when (a) is viewed from above. It is an enlarged plan view showing the vicinity of a bent pipe. FIG. 3 is a front view showing a lid attached to the tip of the bent pipe. FIG. 4 is a view showing an example in which an armor rod is attached to a jumper wire along a bent pipe. FIG. 5 is a view showing another example of a rigid pipe used in the suspension type jumper device of the present invention, (a) is a front view showing the whole, and (b) is a view of (a) from above. It is an enlarged plan view which shows the vicinity of the front-end | tip part at the time. 6A and 6B are diagrams showing a conventional jumper device, in which FIG. 6A is a plan view thereof and FIG. 6B is a front view thereof. FIG. 7 is an enlarged plan view showing the vicinity of the tip portion of the rigid pipe of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission line 4 Tensile insulator series 6 Steel tower arm 7 Suspension type jumper device 8 Rigid pipe 9 Jumper wire 10 Single suspension device 12 Horizontal pipe 13 Curved pipe 14 Cover body 22 Armor rod

Claims (5)

In the suspension type jumper device that electrically connects between the transmission lines having a horizontal angle that is held by the tower arm via the tension insulator series by the jumper line,
A long rigid member is suspended from the tower arm via a jumper suspension device, and both ends of the rigid member are bent toward the tower arm side so that the jumper wire is fixed along the rigid member. A suspension type jumper device characterized by that. The suspension-type jumper device according to claim 1, wherein both ends of the rigid member curved are configured by separate members that can be attached and detached. The suspension type jumper device according to claim 1 or 2, wherein an armor rod is attached to a portion of the jumper wire along the curved both ends of the rigid member. The suspension type jumper according to claim 1, wherein the rigid member is constituted by a pipe-like member, and is configured by combining a horizontal pipe and bent pipes provided at both ends of the horizontal pipe. apparatus. The suspension type jumper device according to claim 1, wherein the rigid member is constituted by a pipe-like member, and both ends are closed by a lid.

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