JP2011234515A - Pipe-type jumper divice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe-type jumper device that achieves its cost reduction by reducing the number of sizes of grasping metal fittings.SOLUTION: A pipe-type jumper device comprises a grasping metal fitting 25 that grasps two parallel pipe conductors 11, where a metal adapter 35 with its outside diameter matching an inside diameter of a pipe-grasping groove 29 of the grasping metal fitting 25 and its inside diameter matching an outside diameter of the pipe conductor 11 is interposed between the grasping metal fitting 25 and the pipe conductor 11, so that the grasping metal fitting 25 configured to grasp the pipe conductor with a certain outside diameter is used to grasp the pipe conductor 11 with smaller outside diameter than the certain outside diameter.

Description

  The present invention relates to a pipe-type jumper device for an overhead power transmission line.

  A conventional pipe-type jumper device is shown in FIG. The pipe-type jumper device electrically connects the overhead transmission line 9 that is secured to both sides of the arm 1 of the steel tower via the tension insulator series 3, the yoke 5, and the retaining clamp 7, respectively, and has a rigid pipe conductor. 11, a jumper wire 13 having flexibility, a rod-like suspension member 15 for suspending the pipe conductor 11, and the like (see Patent Documents 1 and 2).

  The pipe conductor 11 is composed of two aluminum pipes having a circular cross section arranged in parallel in the same horizontal plane. The number of jumper wires 13 is generally the same as the number of conductors of the overhead power transmission line 9 (four in the illustrated example), the upper end is connected to the retention clamp 7, and the lower end is connected to the end of the pipe conductor 11. The suspension member 15 has an upper end connected to the yoke 5 and a lower end connected to the vicinity of the end of the pipe conductor 11.

  The pipe conductor 11 is attached with a hanging metal fitting 17, a grounding metal fitting 19, a jumper horn 21, and a spacer 23. The suspension fitting 17 connects the pipe conductor 11 to the lower end of the suspension member 15, and is attached to a grasping fitting 25 that holds the two pipe conductors 11, as shown in FIG. The holding metal fitting 25 includes an upper metal fitting 27A and a lower metal fitting 27B each having a pipe holding groove 29, and a bolt nut 31 for tightening.

  The grounding metal 19 is for discharging the electric charge remaining on the transmission line or the like to the ground in the event of a power outage or the like, and this is also a gripping metal 25 as shown in FIG. 3 that holds the two pipe conductors 11. It is attached. The jumper horn 21 is for discharging a surge voltage in opposition to the earth side horn 33 attached to the tower arm 1, and this also holds the metal fitting 25 as shown in FIG. 3 for holding the two pipe conductors 11. Is attached. The spacer 23 holds the two pipe conductors 11 at a predetermined interval, and is composed of a holding fitting 25 as shown in FIG.

JP 2001-157347 A JP 2002-51442 A

  Aluminum pipes of various sizes with an outer diameter of 80 mm to 120 mm are used for the pipe conductor of the pipe type jumper device according to the current capacity. For this reason, conventionally, gripping metal fittings have been designed and manufactured for each outer diameter of the pipe conductor. However, since the gripping brackets are manufactured by casting or forging of steel or aluminum alloy, when the gripping brackets are manufactured for each outer diameter of the pipe conductor, a mold is prepared for each outer diameter of the pipe conductor and a small amount is produced. There is a problem that it is necessary and the cost becomes high.

  An object of the present invention is to reduce the cost of a pipe-type jumper device by reducing the types of sizes of gripping metal fittings.

  In order to achieve the above object, the present invention provides a pipe-type jumper device having a holding fitting for holding two parallel pipe conductors, using a holding fitting manufactured to hold a pipe conductor having an outer diameter. In order to grip a pipe conductor having a smaller outer diameter, an adapter whose outer diameter matches the inner diameter of the pipe gripping groove of the gripping bracket and whose inner diameter matches the outer diameter of the pipe conductor between the gripping metal fitting and the pipe conductor. A metal fitting is interposed.

  According to the present invention, since one size holding fitting manufactured to hold a pipe conductor having a certain outer diameter can be used to hold a pipe conductor having a smaller outer diameter, it is possible to hold one size holding fitting. Can be shared by pipe conductors having different outer diameters. For this reason, the kind of size of a holding | grip metal fitting can be reduced significantly and the cost reduction of a pipe type jumper apparatus can be aimed at.

The front view which shows the principal part of one Example of the pipe type jumper apparatus which concerns on this invention. The side view which shows an example of the conventional pipe type jumper apparatus. The front view which shows the principal part of the pipe type jumper apparatus of FIG.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. The overall configuration of the pipe-type jumper device is the same as that of the conventional example shown in FIG. FIG. 1 corresponds to FIG. 3 described above, and similarly to FIG. 3, 11 is a pipe conductor, 17 is a hanging metal fitting, 25 is a holding metal fitting for holding the pipe conductor 11, and 27A and 27B constitute a holding metal fitting 25. An upper metal fitting and a lower metal fitting 29 are pipe holding grooves of the holding metal fitting 25, and 31 is a bolt nut for fastening the upper metal fitting 27A and the lower metal fitting 27B and attaching the hanging metal fitting 17 to the holding metal fitting 25.

  This pipe-type jumper device is characterized in that the holding fitting 25 and the pipe conductor are used to hold the pipe conductor 11 having a smaller outer diameter by using the holding fitting 25 manufactured to hold a pipe conductor having a certain outer diameter. 11, an adapter fitting 35 having an outer diameter that matches the inner diameter of the pipe holding groove 29 of the holding fitting 25 and an inner diameter that matches the outer diameter of the pipe conductor 11 is interposed to hold a pipe conductor having a certain outer diameter. The pipe conductor 11 having a smaller outer diameter is gripped by the gripping metal fitting 25 manufactured as described above. The adapter fitting 35 is composed of a pair of semi-cylindrical members that are divided into two vertically.

  In this way, since one size of the holding fitting can be shared by pipe conductors having different outer diameters, the size types of the holding fitting can be greatly reduced. For example, when gripping a pipe conductor with an outer diameter of 90 mm using a gripping bracket manufactured to grip a pipe conductor with an outer diameter of 100 mm, an adapter bracket with an outer diameter of 100 mm and an inner diameter of 90 mm is interposed to If a 90 mm pipe conductor is gripped, a grip fitting for gripping a 90 mm outer diameter pipe conductor is not necessary. In this case, an adapter bracket is required separately. However, the adapter bracket is significantly smaller in size and simpler in shape than the gripping bracket, and thus is much cheaper than the gripping bracket. In this way, the size of the gripping metal can be reduced to one half of the conventional size simply by allowing one size of the gripping metal to be shared by, for example, two types of outer diameter pipe conductors.

  The upper half of the adapter fitting 35 is preferably fixed to the upper fitting 27A and the lower half to the lower fitting 27B by screwing or the like.

  Moreover, although the case where the suspension metal fitting 17 was attached to the holding metal fitting 25 was demonstrated in the said Example, when attaching a grounding metal fitting or a jumper horn etc. to a holding metal fitting, or the case where a spacer is comprised with a holding metal fitting, it is the same.

11: Pipe conductor 17: Hanging metal fitting 25: Holding metal fitting 27A: Upper metal fitting 27B: Lower metal fitting 29: Pipe holding groove 31: Bolt nut 35: Adapter metal fitting

Claims (1)

  In a pipe-type jumper device having a holding fitting for holding two parallel pipe conductors, a pipe conductor having a smaller outer diameter is held by using a holding fitting manufactured to hold a pipe conductor having an outer diameter. Therefore, an adapter fitting in which the outer diameter matches the inner diameter of the pipe holding groove of the holding fitting and the inner diameter matches the outer diameter of the pipe conductor is interposed between the holding fitting and the pipe conductor. Pipe type jumper device.

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