JPH0427763B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is mainly used in the relining work of power distribution lines, and in light of the recent social situation, it is intended to perform the work efficiently without power outages. It was made by

(Conventional technology) Due to the recent increase in electricity demand, distribution line replacement work has been carried out in various places, but due to changes in social conditions, recent replacement work has required the use of computers, especially in urban and commercial areas. Due to the use of the line, it is not permissible to work on a power outage even for a moment, so a bypass is installed below the energized old line, and this bypass line is kept energized during the work to remove the old line and replace it with the new line. The construction method used is to remove the bypass line and move to the next construction span in sequence after the new line has been installed. In this case, if the construction is carried out in one span, the distance is about 30 meters, and even a slight sagging of the bypass line will not obstruct traffic, and there will be no problem of electrocution of passersby below, but it is necessary to install as many utility poles as possible. Ideally, the bypass line should be installed in all spans at once to increase efficiency, so for example, if 4 to 5 spans are to be constructed, a support line should be stretched across the entire length, and the bypass line should be installed on that support line. A construction method was devised that prevents the bypass line from sagging and makes it easier to store it at the end of the construction work, by suspending moving gold wheels holding metal wheels at predetermined intervals and moving them using tow ropes.

(Problem to be Solved by the Invention) However, if the movable gold wheel that slides sequentially over the telephone poles within the construction span while maintaining the predetermined intervals cannot pass over the utility poles, the construction span cannot be lengthened. However, since the purpose could not be achieved, the support wire was stretched between the first and last utility pole, the support wire was supported by the middle pole, and the structure as shown in Figures 6 and 7 was constructed so that the moving gold wheel could slide over it. Support hardware was used. However, the distribution poles are not all lined up in a straight line, and if this middle pole were to become the apex of the curve, the sliding mobile wheel could come off the support line W held by the support hardware. often seen.

(Means for Solving the Problem) Therefore, in the present invention, the support wire is always kept in a closed state in the movable metal wheel by using a supporting hardware that supports the support wire and a movable metal wheel corresponding thereto, and The present invention discloses a construction method that prevents derailment by crossing the support hardware in that state.

(Function) In order to establish the construction method of the present invention, the movable metal wheel B that passes through the support point and the intermediate support metal fitting HG that constitutes the corresponding support point are essential components.

The moving metal wheel B has a roller 1 sliding on the support line W.
A sliding plate provided on opposing surfaces of a plurality of sides 7 sandwiched by grooves 2 radially arranged in two rotary plates 3, 3' with a frame 9 supporting a frame 9 fixed at a predetermined interval. The bypass wire A is supported on a roller 5 which is freely supported between parts 8 and bridged between the lower parts of the frames 1 and 1' provided at both ends of the connecting shaft 6 of the rotary plates 3 and 3'. The intermediate support bracket HG has a U- or V-shaped support frame 1 that can be opened and closed at the bottom of the attachment part to the utility pole.
8, and the support line W is received at the U-shaped bottom of the two series of support frames 18, and the support frame 18 of the support fitting is received in one of the radial grooves of the movable metal wheel B.
Irrespective of the frame body having the roller suspended from the support line W, the two rotary plates that clamp it rotate to push out the support frame 18, and the support metal fitting HG
It is something that passes through.

Therefore, the extension of the bypass line A is completed by passing through the multi-span support rope support points of the present invention without derailing.

(Example) The present invention has a moving metal wheel B and an intermediate support fitting HG shown in FIGS. 4 and 5 as main components,
First, an intermediate support fitting HG is attached to the position below the old line of each utility pole P in the planned span, and each support line W is suspended from the bottom of the support frame 18.

In addition, the lead-in part is continued obliquely from the first pillar to the ground, and the terminal pillar is held back. The support wire W may be inserted into the bottom of the support frame 18 by opening the openable and closable support frame 18, or by inserting the tip thereof. The connecting rope 17 is connected to the line of the introduction section which has been prepared above.
The rollers 10 of the frame 9 of the mobile metal wheel group connected at predetermined intervals are each suspended, and the rollers 5 at the bottom are suspended.
The bypass line A is held on top. Pull the traction rope R through the final end pillar of the wire span and connect the bypass line A.
By connecting the tip of the metal wheel to the first movable metal wheel whose tip is fixed, and pulling it with an axle winch, etc., the group of movable metal wheels holding the bypass line A adjacent to the inclined line of the introduction part can be maintained at a predetermined interval. Climb up the introduction part and reach the intermediate support fitting HG. The support line W on which the mobile metal wheel group is suspended is supported by the bottom of the U-shaped support frame 18 of the intermediate support fitting HG, and the roller 10 of the mobile metal wheel B that has slid on the support line W is supported by the bottom of the U-shaped support frame 18 of the intermediate support fitting HG. The rotary plates 3, 3' that slidably support the support frame 18 receive the support frame 18 in their grooves 2, and while the support frame 18 passes by rotating, it always continues to slide on the support line W, and both rotations A bypass wire A is mounted on the lower wire receiving roller 5 supported by a shaft 4 passing through the plates 3, 3'.
Since the bypass line A is held, the bypass line A is extended in the same manner by passing through each intermediate support point of the support line W and reaching the end of the extension span. Thereafter, the bypass line A is held at both end pillars, connected to the old lines at both ends, and energized, and after the construction is completed, the connecting rope 17 and the bypass line A are wound up and collected.

(Effects of the Invention) As described above, by relining the distribution line using the construction method of the present invention, the movable metal wheel B does not derail at the supporting point W of the intermediate pillar, which was conventionally seen, and At the introduction part of the system, a group of movable gold wheels can be set up to hold the bypass line A, which not only reduces the chances of working at heights and prevents falls, but also has great economic effects such as labor savings during construction. It is.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of this method, Figure 2 is a front view of the moving metal wheel, Figure 3 is its right side view, Figure 4 is a left side view of the curved pillar passing through the intermediate support bracket, Figure 5 The figure is its front view, Figure 6 is a front view of the conventional product in use,
Figure 7 is its plan view. Symbols in the diagram: A...Bypass line, B...Moving metal wheel, H...Holding bracket, HG...Intermediate support bracket, R
...Tow rope, W...Support line, 1,1'...Frame, 2...Groove, 3,3'...Rotating plate, 4,6
...Shaft, 5...Bearing roller, 7...Side, 8...
Sliding part, 9... Frame, 10... Roller, 17...
...Connection rope, 18...Support frame.

Claims (1)

[Claims] 1. When replacing old and new distribution lines, support wires W are provided at an angle from the starting end of the line to the ground, and connected to this support line W is installed on each pillar from the starting end of the line to the final end. The support wire W is stretched through the bottom of the U- or V-shaped closing support frame 18 of the intermediate support fitting HG in a suspended state, and the support wire W is continuously stretched in the closed state over the entire length of the wire span. After setting, the moving metal wheel B group connected at a predetermined interval while holding the bypass line A is mounted on the support line W of the introduction part, and the head of the moving metal wheel B group and the R end of the towing rope are mounted. By connecting the tow rope R with a winch or the like under the terminal column, the movable metal wheels B group ascends the introduction part, and furthermore, the support line W intermediate support metal fitting HG, which is supported in a closed manner by the extension span column, is connected. After each movable metal wheel B sequentially passes through the closing support frame 18 and moves without derailing over multiple spans to the support line W anchoring point of the final end column, and is arranged at regular intervals,
Connect both ends of the held bypass line A to the old line and energize them. During this time, remove the old line in the span and replace it with the new line, then energize the new line and move the moving gold wheel B.
An uninterruptible replacement method for distribution lines, which is characterized by removing groups, support wires W, intermediate support metal fittings HG, etc.