JPH0470852B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for attaching a snow-resistant ring, which is mainly used as a countermeasure against snow damage to power transmission lines, to an existing power transmission line or its ground line. .

(Prior Art and Problems) Countermeasures against snow damage on power transmission lines are essential when considering a stable supply of electric power, and each electric power company is also undertaking this work as a priority issue. However, this first targets large-diameter, high-capacity lines, and countermeasures tend to be delayed for small-diameter, especially single-conductor transmission lines less than 100 square mm. When installing anti-snow rings (hereinafter referred to simply as rings), which are mainly used to prevent snow damage, a method is used in which a flying craft is used to ride onto a power transmission line and the ring is installed on the line immediately after the flying ring has passed. It was because I was there. In other words, for large-diameter power lines, the weight of the spacecraft is 20 kg, and the weight of the worker is 75 kg.
Even if the weight of tools is 10 kg, a load of about 100 kg will only be applied to a wire with a tensile strength of 10 tons, but a small diameter transmission line of about 70 square mm will have a load of about 100 kg.
The load of Kg was a burden, and there was a risk of breakage on aging railway lines. In addition, in the case of single-conductor lines, the aerial vehicle used for construction has rollers at the front and back, and the worker sits parallel to the line between them, and the worker sits on the line in front of his/her chest. You have to keep both arms in a raised position behind the rear roller at all times, and the tools used to fix the ring on the line are used in a direction perpendicular to the line with the arms once stretched parallel to the line, which can cause fatigue. The work efficiency was extremely poor. Therefore, it has been considered to attach the ring to a robot using a lightweight self-propelled machine, but visual inspection is required to confirm and inspect the attachment, and this has not yet reached the stage of completion.

(Means for Solving the Problems) Therefore, in the present invention, in order to efficiently attach a ring to a small-diameter old power line by hovering work in a sustainable posture, existing small-diameter power transmission lines, Alternatively, install a new support line using a temporary arm at a predetermined position in the horizontal direction of the ground line, and carry out installation work by mounting an aerial vehicle that corresponds to the two horizontal lines. If it breaks, the spacecraft's rollers, which move in a closed manner on the support line, prevent it from falling to the ground.

(Example) First, a small-diameter Kevlar rope (registered trademark) is used as a pilot rope P to be extended from a steel tower T at one end to a steel tower at the other end using a self-propelled machine L mounted on an existing line C. When the pilot rope P reaches the other end of the steel tower, it is wound up and a large diameter support line K made of Kevlar rope (registered trademark) connected to the rear end is extended across the span. At predetermined intervals, metal wheels A to prevent sagging are suspended from line K at a certain length to maintain the distance from the support line, and workers on the tower at one end use these metal wheels A to connect existing lines C and G. The support wires K are inserted into the span and are suspended from the existing wires C and G of the span at predetermined intervals by metal wheels A. The support line K that has been extended is the spacecraft B which will be described later.
Perform tension lines horizontally at the distance between the left and right rollers. This horizontal separation distance is the overhang length of the temporary arm attached to any steel tower and the metal wheel A mentioned above.
This is approximately the same length as the rope used to hang the rope. As a result of the above, the two-strip spacecraft B as shown in Figures 3 and 4 is mounted on the two-strip line stretched horizontally by the existing lines C, G and the support line K, and the two-strip spacecraft B is mounted on the line stretched horizontally by the existing lines C, G and the support line K, and then exited from the tower. The construction work will be carried out there. In this spacecraft B, the roller on the support line side is mounted on the support line K in a closed manner by its frame. In the above configuration, the worker inside the spacecraft B attaches rings R at predetermined intervals to the existing lines C and G after the rollers have passed, but in the unlikely event that the existing lines C and G become obsolete or If the spacecraft B and the worker are severed due to damage and cannot be strong enough to support it, the spacecraft B will lean only on the support line K. The support line K, which is made of aluminum (registered trademark) etc., supports the load and prevents it from falling. As the spacecraft B moves, it reaches the metal wheel A (Fig. 5) that connects the two lines (K to C, G), loosen the butterfly bolt of the metal wheel A and open the metal wheel frame. Remove it from the existing lines C and G, and pass it under the roller section on the support line side of spacecraft B as shown in Figure 6, and the support line K side is the base point of the suspension cable of metal wheel A (tape after clipping). After that, the gold wheel A will be mounted on the existing lines C and G again. After reaching the other end of the steel tower and completing the installation work of the ring R as described above, the support wire K of the one end of the steel tower is unfastened and wound up from the other end of the steel tower.
The support wires K suspended from the existing wires C and G at predetermined intervals by the metal wheel A are wound up without sagging.

(Effects of the Invention) As described above, by using the construction method of the present invention, ring installation work can be carried out even on small-diameter power transmission lines without fear of falling due to line cutting, and in addition, in the unlikely event of line cutting, ring installation work can be carried out. When this occurs, the parallel ivy support lines are connected at specified intervals using metal wheels, which prevents the lines from hanging down to the ground and prevents vehicles, houses, etc. from passing on the ground. This will not cause any damage and will allow the line to be restored quickly.

[Brief explanation of the drawing]

Figure 1 is a procedure diagram of this construction method, Figure 2 is a perspective view of the state in use, Figure 3 is a front view of the spacecraft, Figure 4 is a right side view of the spacecraft, and Figure 5 is a perspective view of the metal wheel installation. , Fig. 6 is a diagram of the metal wheels passing through the roller section of the spacecraft, Fig. 7 is a perspective view of the anti-snow ring, Fig. 8 is a front view of the temporary arm for the tension type ground wire, Fig. 9 is FIG. 10 is a plan view of a tension-resistant arm reinforcing member, FIG. 11 is a left side view of a temporary arm for a suspension type power line, and FIG. 12 is a front view thereof. Codes in the diagram: A...Golden wheel, L...Self-propelled machine, B...
...Aircraft, P...Pilot rope, C...Existing line (power transmission line), R...Ring, G...Existing line (ground wire), T...Telephone tower, K...Support line, U... Temporary arm money.

Claims (1)

[Claims] 1 Single-conductor power transmission lines with a cross-sectional area of 100 square mm or less,
Or, in the work of installing anti-snow rings on ground wires, metal wheels suspended by hanging ropes of a predetermined length are arranged at regular intervals on the support wires, and the existing wires are inserted into the metal wheels on the steel tower.
A support line is installed almost parallel to the existing line at a predetermined position in the horizontal direction of the existing line, and the roller part of the spacecraft that moves on the support line is installed on the existing line and the support line. The snow ring is configured so that it can be mounted on the support line in a closed manner, and the anti-snow ring is installed while the spacecraft is moved between the towers. An installation method for an anti-snow ring that is characterized by supporting it on a metal wheel that prevents it from sagging and removing the support line.