JP4146554B2 - Method of handling a switch in a live state by indirect hot line work using a hot stick and a switch hanging tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present application relates to a repair work for a distribution line, and particularly to a switch hanging tool used when a re-covering work is performed in the vicinity of a line in a live line state.
[0002]
[Problems to be solved by the invention]
Along with the rapid changes in society, such as the spread of computers, the demand for power is increasing, and changes are also required in terms of equipment construction.
In other words, power outage work that has been relatively forgiven in the past has become unacceptable recently, and hot line work has been forced even in work to change to large capacity lines due to increased demand.
Against this backdrop, manipulators have started to develop and use live-line construction robots, but their use has not been widespread, and possible construction is also uniform in a fixed position such as wire connection work. It is limited to a typical thing. Therefore, switch installation / replacement, etc. is performed carefully so as not to touch the live line while using a work at a high altitude and climbing pole work. Not only is construction efficiency inferior, it also requires manpower. It was a dangerous work.
[0003]
[Prior art]
Conventionally, when a switch is replaced in the vicinity of a line in a live line state, much labor and danger are involved. Referring to Fig. 8, the low voltage power line, low piezoelectric light line, etc. at the bottom of the switch are protected by rubber pipes, the pin insulators, racks, and lead-in lines are protected by the edge cover, and then the temporary scaffold for the assistant is installed, Protecting the arm side high-voltage line octopus foot and installing temporary scaffolds for workers require considerable labor and time even from the preparatory stage, and the personnel are also the team leader, A worker, B worker (work on the pole) ), C worker (assistance for pole work), and D worker (ground work).
Therefore, not only the work efficiency was bad, but also the work was a risk.
[0004]
[Means for Solving the Problems]
In the present application, in order to solve the above-described problems, the suspension when replacing the switch is performed using a dedicated lifting tool, and the operation is performed from a position away from the live line by an insulated live line operation rod, so-called hot stick. Is.
[0005]
【Example】
Examples of the present application will be described in detail. In this application, the plate material is bent into a U-shape, and the plate material is bent into a U-shape at the center of the horizontal long frame 2 in which the long slot holes 1 and 1 are formed on both ends of the bottom piece. A short frame 3 provided with a hanging ring 4 and a hot stick gripping piece 5 and provided with a telescopic tube 6 which is extendable at the other end is arranged in a cross shape, and the long groove holes 1 and 1 of the long frame 2 are opened and closed. The fixing bolt K1 of the device K is inserted, and at the tip of the fixing bolt K1 is provided a gripping portion 71 that is gripped by a hot stick H at the center, and a shaft 72 that rotates inside the gripping portion 71 is provided. Screw a screw of different thickness on both ends of the shaft 72, screw one end of a special nut 7 formed by screwing nuts 73 and 74 to both ends of the shaft 72, and rotate the bolt 61 on the upper end of the telescopic cylinder 6. Then, the telescopic cylinder 6 is extended and the pressing plate 62 at the lower end of the telescopic cylinder 6 is pressed and fixed to the upper surface of the switch K.
As shown in FIG. 3, the telescopic cylinder 6 is formed by inserting an inner cylinder 64 into an outer cylinder 63 and screwing an upper portion into a bolt 61 screwed with a square screw. A long groove 65 is provided in the inner cylinder 64, A shaft 66 that fits into the long groove 65 is provided in the outer cylinder 63, and the inner cylinder 64 is expanded and contracted in the longitudinal direction by the rotation of the bolt 61.
The bolt 61 in which a square screw is threaded can withstand a large force and prevent loosening.
As shown in FIG. 4, the special nut 7 corresponds to the fixing bolt of the switch, and is a set of two each of millimeter screws M16 and M12 and inch screws W1 / 2 and W5 / 8. , M16 and M12.
[0006]
The method handled by the present application will be described. First, four nuts of the fixing bolt K1 on the switch K are loosened by a wrench attached to the tip of the hot stick for a predetermined length.
Then, the gripping piece 5 of the switch hanging tool is gripped by the hot stick H and is moved onto the switch K, and the long slot holes 1 and 1 of the horizontal long frame 2 are inserted into the fixing bolt K1. (Fig. 5)
Next, with one end nut of the exclusive nut 7 holding the center part with the hot stick H fitted to the end of the fixing bolt K1 inserted into the long slot holes 1,1, the other end of the other hot stick is inserted into the other end nut. Fit the wrench attached to and tighten to the specified amount.
Next, a wrench attached to the tip of the hot stick is fitted to the bolt 61 of the telescopic cylinder 6, the bolt 61 is rotated, the inner cylinder of the telescopic cylinder 6 is extended and lowered, and the pressing plate at the lower end of the telescopic cylinder 6 62 is pressed against the upper surface of the switch K.
This completes the installation of the hanging tool. (Figures 1 and 2)
The hanging ring 4 is previously hooked with a winch hook.
From this state, if the winch is rolled up, the switch K can be lifted in a horizontal state, and the distance previously slackened by a predetermined length becomes the gap between the upper part of the arm metal A, for attaching the upper arm metal The plate K2 is lowered and the mounting plate K2 can be removed from one of the fixing bolts K1 as shown in FIG. 7, so that one of the two fixing bolts K1 is tilted and moved laterally. Thus, the switch K can be removed from the arm metal A. And the switch K is suspended to the ground.
A ground worker removes the lifting tool of the switch that has been lowered to the ground, attaches it to a new switch, lifts it again, moves it to the arm A position, holds the arm bracket mounting plate K2 with a hot stick, and fixes one of them. Fits to the bolt K1.
Next, a wrench provided at the tip of the hot stick H is fitted to the bolt 61 of the telescopic cylinder 6, the bolt 61 is rotated, the inner cylinder 64 is contracted, and the pressing plate 62 is separated from the upper surface of the switch K. Then, the center of the exclusive nut 7 is gripped by the hot stick H, and a wrench provided at the tip of another hot stick is fitted to the other end nut, loosened and removed from the fixing bolt K1. Next, the holding piece 5 of the switch hanging tool inserted into the fixing bolt K1 is held by the hot stick H and removed from the fixing bolt K1.
Then, the nuts of the fixing bolt K1 of the switch K attached to the arm A are fitted with the wrench provided at the tip of the hot stick H and tightened and fixed to complete the installation. It can do work.
[0007]
【The invention's effect】
By using the switch hanging tool of the present application, all of the preparatory work such as low-voltage line protection on the pillar and the replacement work that has been done in the conventional hot-line construction can be omitted. Therefore, it is possible to perform safe work and to greatly shorten the work time. Conventionally, five workers were required, but in the present application, a total of one person who gets on a bucket car and operates the hot stick, and one person who replaces the switch on the ground. Since it can be performed by two people, it is possible to reduce the number of workers and, together with the shortening of the work time, it can contribute to the reduction of construction costs.
[Brief description of the drawings]
FIG. 1 is a front view of a hanging tool of the present application.
FIG. 2 is a right side view of the present hanging tool.
FIG. 3 is a front view of a part of the pressing cylinder of the present hanging tool cut away.
FIG. 4 is a cross-sectional view of a dedicated nut used for the hanging tool of the present application.
FIG. 5 is an explanatory diagram (left side view) of using the hanging tool of the present application.
FIG. 6 is an explanatory diagram (front view) of using the hanging tool of the present application.
FIG. 7 is a perspective view of the usage tool of the present application in use.
FIG. 8 is a column view showing an example of mounting of a switch.
[Explanation of symbols]
1 Long slot
2 Long frame
3 Short frame
4 Hanging ring
5 Grip piece
6 Telescopic tube
7 Dedicated nut
61 volts
62 Press plate
63 outer cylinder
64 inner cylinder
65 long groove
66 axes
71 Grip part
72 axes
73,74 Nut A Arm metal H Hot stick K Switch K1 Fixing bolt K2 Mounting plate

Claims (2)

Loosen the four nuts of the fixing bolt K1 of the switch K attached to the arm A with a wrench provided at the tip of the hot stick H for a predetermined length;
Holding the gripping piece 5 of the switch hanging tool with the hot stick H and inserting the long slot holes 1 and 1 of the horizontal long frame 2 into the fixing bolt K1 on the switch K;
One end nut of the exclusive nut 7 holding the center portion with the hot stick H is fitted to the tip end of the fixing bolt K1 fitted into the long groove hole 1,1, and the other end nut is provided at the tip of another hot stick H. Mating and tightening the wrench
Fitting a wrench provided at the tip of the hot stick H to the bolt 61 of the telescopic cylinder 6, rotating the bolt 61, extending the inner cylinder 64 and pressing the pressing plate 62 against the upper surface of the switch K;
Lift the suspension ring 4, remove the arm bracket mounting plate K2 from one fixing bolt K1 with a hot stick, remove the switch K from the arm bracket A, and use the switch K suspended from the switch K Removing and replacing with a new switch K,
A new switch K is lifted to the arm metal A position, the arm metal mounting plate K2 is gripped with a hot stick, fitted to one fixing bolt K1, and the hot stick H is attached to the bolt 61 of the telescopic cylinder 6. Fit the wrench provided at the tip, rotate the bolt 61, shrink the inner cylinder 64, release the pressing plate 62 from the upper surface of the switch K, hold the central part of the exclusive nut 7 with the hot stick H, and the other end nut A wrench provided at the tip of another hot stick, loosen and remove the special nut 7, hold the gripping piece 5 of the switch lifting tool with the hot stick H, and remove it from the fixing bolt K 1,
Hot wire by indirect hot wire operation using a hot stick comprising the steps of tightening and fixing four nuts of the fixing bolt K1 of the switch K attached to the arm A with a wrench provided at the tip of the hot stick H How to handle a switch in state. A short frame 3 is arranged in a cross shape in the center of a horizontal long frame 2 having long slot holes 1 and 1 formed at both ends, and a suspension ring 4 and a hot stick gripping piece 5 are provided at one end of the short frame 3. The other end portion is provided with an outer tube 63 of the telescopic tube 6, the inner tube 64 is fitted into the outer tube 63, and the upper portion of the inner tube 64 is screwed into a bolt 61 provided in the core portion of the outer tube 63. A suspension tool main body provided with a pressing plate 62 at the lower end of the inner cylinder 64;
A switch hanging tool comprising a dedicated nut 7 provided with a hot stick gripping portion 71 at the center, a shaft 72 rotatably provided in the gripping portion 71, and nuts 73 and 74 screwed to both ends of the shaft 72 .

Images