JP4798509B2 - Suspended jumper device - Google Patents

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.

Since the distortion of the jumper wire increases when the jumper wire attached to the rigid material is greatly bent in the vicinity of the end portion of the rigid material, the applicant of the present application forms a curved portion toward the tower body side at the end portion of the rigid material. As a result, the inventors have found that it is possible to reduce the stress strain, and the present invention has been completed.

That is, the suspension type jumper device according to the present invention is configured in such a manner that the jumper wires electrically connect between the power transmission lines having a horizontal angle held by the tower arm extending from the tower body through the tension insulators. The intermediate part is suspended by the single suspension device suspended from the tower arm, and both ends are suspended by the support device suspended from between the tension-resistant insulator string and the transmission line, and both ends become free ends. The rigid material is provided, and both ends of the rigid material are configured by separate removable members curved toward the tower main body, and the jumper wires are fixed along the rigid material. It is said.

Therefore, since the end of the rigid material is curved toward the tower body , 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.
In addition, since both ends of the curved rigid material are made of detachable separate members, it can be retrofitted to an existing linear rigid material and can be versatile. Become.

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.
In addition, when the rigid material is constituted by a pipe-like member , both sides of the rigid material are used to prevent birds and foreign objects from entering, and to secure an opening for draining water that has entered the pipe. The open end may be closed by a lid with the lower part opened.

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 described above, according to the present invention, the intermediate portion is suspended from the steel tower arm via the jumper suspension device ( single suspension device ), and the support device is interposed between the tension insulator and the transmission line. A rigid material with both ends suspended is provided, both ends of this rigid material are made free ends, and both ends of the rigid material are curved toward the tower body side , and the jumper wire is fixed along this rigid material As a result, the bending angle of the jumper wire can be reduced in the vicinity of the curved end portion of the rigid member to reduce the distortion generated in the jumper wire, and the breakage of the strand can be prevented.

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.
Furthermore, since both ends of the rigid material are constituted by separate detachable members that are curved toward the tower main body side, it becomes possible to retrofit the existing linear rigid material and has versatility. It becomes possible to make it.

  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 pylon main body , and a free end not connected to the horizontal pipe 12 has a flat lid 14 bolted to a flange portion 13b of the bent pipe 13. It is blocked by stopping.
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 is formed to have a size sufficient to prevent 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 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 main body . Even in such a configuration, the curved portion to be bent toward the steel tower main body may be formed integrally or separately.

  Further, 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 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. FIG. 5 is a diagram showing an example in which an armor rod is attached to a jumper wire along a bent pipe. 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.

1 Transmission line 4 Tensile insulator
5 Steel tower body 6 Steel tower arm 7 Suspended jumper device 8 Rigid pipe 9 Jumper wire 10 Single suspension device 12 Horizontal pipe 13 Curved pipe 14 Lid 22 Armor rod

Claims (5)

In the suspension type jumper device that electrically connects between the transmission lines having a horizontal angle held by the tower arm extending from the tower body through the tension insulator series by the jumper line,
The intermediate part is suspended by the single suspension device suspended from the tower arm, and both ends are suspended by the support device suspended from between the tension-proof insulator string and the transmission line, and both ends are free ends. A rigid material is provided, and both ends of the rigid material are configured by separate removable members that are curved toward the tower main body, and the jumper wire is fixed along the rigid material. A suspended jumper device.   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. 3. The suspension type according to claim 2, wherein an intermediate portion of the horizontal pipe is suspended by the single suspension device and both ends of the horizontal pipe are suspended by the support device. Jumper device. The suspension type jumper device according to claim 2 or 3 , wherein the rigid material is closed by lids at the open ends on both sides with the lower part thereof open . The suspension type jumper device according to any one of claims 1 to 4, wherein an armor rod is attached to a portion of the jumper wire along both curved ends of the rigid member.

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