JPH01138911A - Method for foreseeing access of protector to metal wheel - Google Patents

Abstract

PURPOSE:To conduct a wire extension work efficiently by detecting, through a receiver body provided at a metal wheel, the access to said metal wheel of an oscillator fitted to a wire in the position advanced by a specified distance in the direction of wire extension from a protector-fitting part. CONSTITUTION:The length of a wire 3 drawn out in the A direction from a wire drum D is read by a line length meter 4, and which protector 1; comes close to the metal wheel 2; of which steel tower 5; is predicted roughly. In the position advanced by a specified distance in the direction of wire extension from the region where said protector 1; is fitted to the wire 3, a magnetism generator 7 as a transmitter is fitted to the wire 3. Also, the frame 11 of said metal wheel 2 is fitted with a magnetic limit switch 8 as a receiving body. When said magnetism generator 7 comes close to a certain distance, the receiving body 8 detects it and the protector 1; correctly foresees the passage of the metal wheel. In this manner, a wire extension work over a wide range is performed efficiently by a small number of people, because the speed of a winding engine can be reduced with good timing and the metal wheel can be operated so as to pass through the protector easily.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for predicting the approach of a protector to a metal wheel, that is, a method for knowing in advance that a protector will approach a metal wheel.

In this specification, the term "protector" refers to a device used primarily to protect the joints of electric wires during power transmission line extension work, but it is also used to protect the joints of electric wires during power transmission line extension work, but it is also used to protect the joints of electric wires during transmission line extension work. It is also used in a broader sense, such as irregularly shaped parts of electric wires.

Furthermore, the term "electrical wire" shall be used to include wires, messenger wires, traction wires, etc. used in overhead line work.

<Prior art> Conventionally, for example, a guard was placed at each steel tower that needed to be monitored due to its large upper angle, and the guard visually monitored the approach of the protector to the metal wheel, and the guard was monitored by radio or radio. They contacted the drum field or engine field by phone or other means.

<Problem to be solved by the invention> However, the conventional method of manually predicting the approach of the protector's gold wheel has the disadvantage that it increases the number of workers, leading to an increase in costs, and it also requires difficult work in mountainous areas. Visual inspection in the environment is insufficient in that it cannot always be expected to make accurate predictions, and furthermore, it is difficult to expect to always accurately capture the prediction timing that should differ depending on the wire rolling speed. For example, prior to passing the protector, there is a system for operating the metal wheel or adjusting the wire drawing speed to make it easier for the protector to pass, and for measuring the wire drawing tension at all parts when passing the protector. In line extension work where preparations are frequently made in advance, more accurate prediction is required, so manual prediction is even more insufficient.

Means for Solving the Problem> In order to solve this problem, in the present invention, a transmitter attached to the electric wire at a predetermined distance ahead of the protector attachment part in the wire extension direction is moved as the electric wire advances. The gist is to predict the approach of the protector to the gold wheel by detecting the passage of the gold wheel with a receiver provided on the metal wheel [Claim (1)], and this prediction method also includes the following: [Claim (2)]
.

In other words, the transmitter attached to the wire passes through the receiving body installed on the metal wheel at a predetermined distance ahead of the protector attachment part in the wire running direction, that is, a distance determined according to the wire running speed. Since it is designed to predict the approach of the protector's gold wheel by detecting it at , it can always be predicted accurately and at the optimal timing. In addition, although there is no rough prediction of the approach of each protector to the metal wheel of each steel tower by measuring the length of the line, in other words, there is no accurate grasp of the approach distance, it is possible to know which protector is approaching the metal wheel of which steel tower. Since the combination of predictions that can make such a distinction is made, it is possible to identify the protector and predict its approach accurately and at the optimal timing.

<Example> Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 6.

The method for predicting the approach of the gold wheel of this protector is as follows:
The approach of the person to the gold wheel 21 is predicted by a combination of rough prediction and accurate prediction.

Although the rough prediction does not accurately grasp the approaching distance, the purpose of the rough prediction is to be able to distinguish which protector 11 is approaching the gold wheel 21 of which steel tower 51. This is done by measuring the length of the strip with a strip length meter 4 installed at the drum station to determine the forward distance of the protector 11.

Accurate prediction is performed by a combination of the magnetizing body 7 as a "sending body" and the magnetic limit switch 8 as a "receiving body". That is, while the metal wheel 2 is provided with a magnetic limit switch 8 on its frame 11 corresponding to the portion where the electric wire 3 passes (FIG. 2), the electric wire 3 is provided with a magnetic limit switch 8 in the wire extension direction ( A magnetizing body 7 is attached at a position ahead of the protector 11 by a certain distance determined according to the wire drawing speed in the direction of arrow A).
The passing of the metal wheel 21 is detected by the magnetic limit switch 8 prior to the passing of the metal wheel 21, and based on the accurate approach distance given by the attachment point of the magnet 7, the accurate approach state and the accurate passing timing are predicted. I have to. still,
The magnetic limit switch 8 is provided with an arm body 10 as shown by phantom lines in FIG. 2 on the metal wheel 2.
It is also possible to provide it.

As shown in FIGS. 3 and 4, the magnet 7 is a plastic magnet 12 embedded in a cover 13 made of plastic, specifically urethane, and is split into two. The electric wire 3 is fixed to the electric wire 3 using tape or wire using a groove 14 provided on the outer surface of the cover 13. In addition, 15 is a cover 13 for the magnet 12.
It is a lid to be embedded inside. The reason why the magnet 12 is embedded in the plastic cover 13 in this way is to prevent the electric wire 3 from being damaged.

The reason for using the combination of the magnetizing body 7 and the magnetic limit switch 8 as the combination of "emitter" and "receiver" is that various experiments have shown that this combination allows for the most accurate detection. However, it is of course possible to use other methods without departing from the spirit of the invention.

According to the method for predicting the approach of a gold wheel of a protector configured as described above, the protector 11 is, for example, protector 1. After specifying this protector 1. For example, approaching the gold wheel 2□ with a large upper angle can be predicted accurately and at the optimal timing. be able to accurately perform various tasks at the necessary timing, such as operating the wire, adjusting the wire drawing speed, and preparing in advance a system for measuring the wire drawing tension at the wire wheel portion when passing through the protector. become.

Kurou ■ Operation This is the operation of the metal wheel to reduce the resistance of the protector when passing through the protector, and it is possible to use the technique that was previously proposed by Ganto Toyama in Japanese Patent Application No. 62-215220.

This will be briefly explained below with reference to FIGS. 5 and 6.

The two gold wheels (gold wheel bodies) 101 are aligned in the direction of movement of the electric wire 102 (
Each wire cord 103 is connected in series in the direction of arrow A).
The metal wheel 101 on the front side in the direction of movement of the electric wire 102 is previously positioned lower than the metal wheel 101 on the forward side in the direction of movement by adjusting the lengths of the electric wires 102 with the expansion/contraction means 104.
), the protector 105 is on the metal wheel 101 on the front side in the direction of travel
After passing through, by adjusting the length of each hanging cord 103 using the expansion/contraction means 104, the metal wheel 101 on the forward side in the direction of travel is changed to the metal wheel 101 on the near side in the direction of travel.
1 (Fig. 6).

Therefore, in any case, the slope corresponding to the upper angle α that occurred in the case of the conventional one is
10.101, each gold wheel 10
When the protector 105 enters the 1.101, the "upper angle" can be set to approximately 0, and the resistance to passing through the metal wheel due to the rigidity of the protector 105 can be almost eliminated.

When the wire extension 1 cliff and straightening protector passes the wire wheel, the approach of the protector is communicated to the engine station, which in turn reduces the winding speed of the winch and makes the wire extension slower than normal. In addition, the degree of shock such as increased tension due to the passing of the protector's metal ring should be suppressed as much as possible.

Extended line! This method measures the partial wire stretching tension that occurs at the metal wheel when passing through the protector, and the measurement results can be recorded as the wire running history or used as preliminary data for the subsequent drawing of another layer of wire. It is also used as such.

As for the specific method, Ganto Toyama first applied for
293919 and Japanese Patent Application No. 63-102892 can be used, but for details, please refer to the specifications of each application. The method of predicting the approach of a gold wheel using this protector is directly related to the following tasks.

In other words, when the protector passes, the wire tension fluctuates more frequently in a short period of time than in normal conditions, so a system that can accurately capture these frequent fluctuations is based on the prediction of the approach of the protector. This is a task that you have to prepare in advance.

Specifically, in a wire stretching method using such a method of measuring wire tension or a method of predicting the approach of the gold wheel of this protector,
A data importer is installed for each necessary steel tower to import data such as wire extension tension data, gold wheel approach prediction data, etc.
The main processing unit sequentially calls each data import device to transmit data. Therefore, when it is predicted that the protector will approach the metal wheel, the main processing unit temporarily stops calling each data importer, and the remaining main processing unit calls are used to block the protector's ability. The concentration of calls per hour to the data acquisition device of the steel tower with the gold car approaching and passing makes the volume several times higher than normal, and the frequent tension of the line due to the passing of the protector. The goal is to be able to accurately capture fluctuations.

<Effects of the Invention> As explained above, the method for predicting the approach of a metal wheel of a protector according to the present invention is based on the method for predicting the approach of a metal wheel of a protector at a predetermined distance ahead in the wire running direction from the protector mounting part, that is, a distance ahead determined according to the wire running speed. The approach of the protector's metal wheel is predicted by detecting the passage of the transmitter attached to the wire at the site by the receiver installed on the metal wheel, so the prediction can always be made accurately and at the optimal timing. It is possible,
In addition, although there is no rough prediction of the approach of each protector to the metal wheel of each steel tower by measuring the length of the line, in other words, there is no accurate grasp of the approach distance, it is possible to predict which protector is approaching the metal wheel of which steel tower. Since predictions that can be distinguished are combined, it is possible to identify the protector and predict its approach accurately and at the optimal timing.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a line extension work using the method of predicting the approach of a metal wheel of a protector according to the present invention, Fig. 2 is an enlarged schematic side view of the part indicated by the arrow ■ in Fig. 1, and Fig. 3 is a schematic sectional view of the magnetizing body, FIG. 4 is a schematic sectional view taken along the arrow IV-IV line in FIG. 3, and FIGS. FIG. 11---Protector 2 i--------- Metal wheel 3--1--Wire 4--Single length total 5 i-------One steel tower 7-- −−・−Magnetic body (transmitter)

Claims (2)

[Claims] (1) A transmitter attached to the wire at a predetermined distance ahead of the protector attachment part in the wire extension direction passes through the wire wheel as the wire advances, using a receiver installed on the wire wheel. A method for predicting the approach of a protector's gold wheel by detecting the approach of the protector's gold wheel. (2) Approximate prediction of the approach of each tower to the gold wheel for each protector by measuring the length of the wire to be paid out with a length meter installed in the drum field, and the method according to claim (1). A method for predicting the approach of a protector's gold wheel by combining the method for predicting.