Railroad suspension stand for extension of median line in overhead earth wire and terrain and extension method

Abstract

To provide a railroad suspension stand for extension of a median line in overhead earth wire and a terrain and extension method in which a safety of a worker can be improved while improving a quality management performance of an electric wire by preventing an interference to a vertical material at a terrain and extension method in the overhead earth line.SOLUTION: A railroad suspension stand for extension of a median line in overhead earth wire attached to a top part of a tower, comprises: a column 2 that is provided at a lower part of a suspension stand, and is fixed to the top part of the tower; and a beam 3 connecting the column by bars extending horizontally so as to make the column four corners. The beams on front and rear surfaces of the suspension stand are provided with a hanger 31 for a wire-extending wheel, and a wire-extending wheel attached by the hanger is located at the center of the beam.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a wire extension trolley suspension frame for overhead ground wires and a re-laying method. [Background technology]

[0002] Conventionally, when replacing the center wire of an overhead ground wire that runs between steel towers for transmission lines, etc., a method has been used in which steel tower assembly bars are installed in two locations, one on the younger number side and one on the older number side, and a wire extension metal car is attached to extend the wire. During wire extension work, it is important to stretch the wire between the steel towers without damaging the wire or degrading its performance.

[0003] Regarding this construction method, a cable extension method has been proposed in which a metal wheel mounting fixture is attached to the main pillar material extending along the vertical direction of the steel tower, making it possible to minimize reinforcement of the steel tower (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent application No. 2020-260035 Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional wire-extending method and the wire-extending method described in Patent Document 1, the wire-extending pulley is attached to the vertical member of the steel tower via a pulley attachment. Therefore, in a suspension steel tower, the wire-extending pulley is in a vertical position, which makes it prone to lateral sway due to wind, etc., and can cause interference with the vertical member where the electric wire comes into contact, potentially damaging the electric wire. Furthermore, with the vertical member described in Patent Document 1, when workers actually work, there are sometimes limited locations for installing safety harness ropes, which may make it difficult to fully guarantee safety.

[0006] Therefore, the present invention aims to provide a suspension stand and replacement method for a center wire extension metal wheel in an overhead ground wire, characterized in that the attached extension metal wheel is located in the center of the connecting part rather than on the vertical member. [Means for solving the problem]

[0007] The present invention is a wire-extending iron hoisting stand for the center wire of an overhead ground wire attached to the top of a steel tower, comprising: a pillar provided at the bottom of the hoisting stand and fixed to the top of the steel tower; and a beam connecting the pillar with horizontally extending rods that form the pillars as its four corners, wherein the beams on the front and back of the hoisting stand are provided with hoisting devices for the wire-extending iron hoist, and the wire-extending iron hoist attached by the hoisting devices is located in the center of the beam.

[0008] In addition, the present invention is a metal wheel suspension stand for extending a center wire in an overhead ground wire, wherein the beam enables attachment of a safety belt rope for a worker.

[0009] The present invention also provides a method for re-laying the center wire of an overhead ground wire, characterized in that the above-mentioned overhead ground wire center wire extension metal wheel suspension frame is attached to the top of a steel tower. [Effects of the Invention]

[0010] When the suspension stand of the present invention is used, the position of the wire extension metal cart is not on the vertical member to which the pillar is fixed, but is located in the center of the beam connecting the vertical members of the steel tower, which makes it possible to prevent interference with the vertical members when replacing the center wire of the overhead ground wire, improving quality control of the electric wire.

[0011] Furthermore, by attaching a safety belt rope to the hoisting platform of the present invention, the safety belt rope is always attached to the worker in a position higher than the waist to ensure safety, thereby improving the safety of the worker. [Brief explanation of the drawings]

[0012] [Figure 1]FIG. 1 is a diagram illustrating an outline of a wire extension trolley suspension stand for a center wire in an overhead ground wire according to one embodiment of the present invention. [Figure 2] FIG. 1 is an overall front view of a center wire extension trolley suspension frame for an overhead ground wire according to an embodiment of the present invention. [Figure 3] FIG. 1 is an overall side view of a wire extension trolley suspension frame for a center wire in an overhead ground wire according to one embodiment of the present invention. [Figure 4] FIG. 2 is an overall top view of a wire extension trolley suspension stand for a center wire in an overhead ground wire according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] The configuration of a wire extension trolley hoist 1 for a center wire in an overhead ground wire according to an embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is a diagram illustrating an overview of a wire extension trolley hoist for a center wire in an overhead ground wire according to an embodiment of the present invention.

[0014] The steel tower 100 to which the present invention is applied is configured by connecting a plurality of pillars P, each formed of a tubular steel pipe that extends upward from the ground G and slopes upward toward the center C of the steel tower 100, with cross members, diagonal braces, etc. As shown in Figure 1, the suspension frame 1 is connected to the upper ends of the pillars P that extend in the vertical direction of the steel tower 100, and is fixed to the top of the steel tower 100 so that the extension direction of the wire faces the front and back.

[0015] The hoisting frame 1 is a frame formed of angle bars such as stainless steel, aluminum, or steel, and is used to fix metal wheels (hereinafter referred to as metal wheels) for extending the center wire (hereinafter referred to as center wire) of an overhead ground wire to the steel tower 100. The hoisting frame 1 is equipped with metal wheel suspending tools, and is capable of suspending the metal wheels. The metal wagon in this invention has one or more wheels over which the center wire is stretched, and is generally made of iron or aluminum alloy, or these materials lined with urethane rubber. The center wire is stretched over the wheels of the metal wagon, and by rotating the wheels, the center wire is extended between the steel tower 100 and another steel tower located next to it. This metal wagon typically weighs about 10 to 20 kg. The metal wagon suspended from the suspension frame 1 is not specific, and can be replaced as appropriate depending on the electric wire used and the construction content.

[0016] Next, the configuration of the suspension frame 1 will be described with reference to Figures 2, 3, and 4. Figures 2, 3, and 4 are an overall front view, an overall side view, and an overall top view, respectively, of a suspension frame for extending a center wire of an overhead ground wire according to one embodiment of the present invention. Note that arrows in the figures indicate directions within the figures and correspond to the following explanations.

[0017] As shown in Figure 2, the suspension frame 1 has four columns 2, four beams 3, and eight braces 4. Using these components, the suspension frame 1 has two pairs of different configurations for the front and back, and the right and left sides.

[0018] Four pillars 2 are installed in the extension direction of the support pillars P of the steel tower 100. At the pillars 2, the top of the support pillars P is joined to the suspension frame 1 with bolts, utilizing flange holes at the top of the steel tower 100. This serves to support the suspension frame 1 and maintains the stability of the suspension frame 1 at high altitudes.

[0019] As shown in Figure 4, the beam 3 is positioned horizontally relative to the support pillars P so that the four rods form a square shape with the pillars 2 as the four corners when viewed from the top of the suspension frame 1, connecting the pillars 2 together. In addition, the beams 3 on the front and back sides of the suspension frame 1 are equipped with iron wheel hangers 31 that can hang iron wheels for extending the center line. In addition, a safety rope for work can be attached to the beam 3.

[0020] The braces 4 are diagonal reinforcement members that reinforce the rectangular frame, and are provided to maintain the strength of the suspension base 1. The braces 4 are connected to different members depending on the direction of the suspension base 1 to which they are provided. As shown in FIG. 2, in the front and rear directions of the suspension frame 1, the brace 4 is joined obliquely downward from the beam 3 to the lower part of the column 2 so as to surround the iron wheel suspension device 31. As shown in FIG. 3, on the right and left side surfaces of the suspension frame 1, the braces 4 extend obliquely downward from the columns 2 toward the lower part of the opposite column 2, joining the columns 2 together.

[0021] When the suspension stand 1 of the present invention is used, the position of the pulley is not on the extension of the vertical members of the steel tower 100, but is located in the center of the beam 3, which is the intermediate part between the vertical members, making it possible to prevent interference with the vertical members when replacing the center wire, improving the quality control of the electric wire. Furthermore, by attaching a safety belt rope to the hoisting platform of the present invention, the safety belt rope is always attached to the worker at a position higher than the waist, thereby improving the safety of the worker.

[0022] Furthermore, because the line is extended directly above the support point of the center line, it is easy to transfer the center line to the metal car, and there is no need to change the metal car mounting position regardless of which line is stopped, so a secondary effect of improved workability can be expected.

[0023] The present invention also includes a method for re-laying the center wire of an overhead ground wire, characterized by attaching the above-mentioned center wire extension metal cart suspension frame using the suspension frame 1 to the top of the steel tower 100. In this method, because the suspension frame 1 is entirely made up of angle bars, there is no need for reinforcement with wires or the like that was previously required for vertical members.

[0024] The present invention is not limited to the above-described embodiment, and modifications and improvements within the scope of achieving the object of the present invention are included in the present invention. [Explanation of symbols]

[0025] 1: Hanging stand 2: Pillar 3: Beam 31: Gold wheel hanging device 4: Brace 100: Steel tower P: Prop C: Center of the tower G: Ground

Claims

1. A suspension stand for a wire extension metal cart for a center wire of an overhead ground wire attached to the top of a steel tower, A column provided at the bottom of the suspension frame and fixed to the top of the steel tower; A beam connecting the columns by horizontally extending rods that form the columns as four corners; Equipped with The beams at the front and rear of the suspension frame are provided with suspension devices for the wire pulling chain, A wire extension metal wheel suspension stand for a center wire of an overhead ground wire, characterized in that the wire extension metal wheel attached by the suspension device is located in the center of the beam.

2. 2. The overhead ground wire center wire extension metal trolley suspension stand according to claim 1, wherein the beam allows a worker's safety harness rope to be attached.

3. A method for re-laying a center wire in an overhead ground wire, comprising attaching the wire-extending metal wheel suspension frame for the center wire in the overhead ground wire according to claim 1 to the top of a steel tower.

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