JP2600251B2 - Automatic wire extension system for electric wires - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is to continuously monitor a change in the extension sag of an electric wire in an extension line such as an overhead power transmission line, and to always optimize the sag. TECHNICAL FIELD The present invention relates to an automatic wire drawing system that enables wire drawing while being automatically controlled.

When [Prior Art and Problems] extended line overhead transmission line, as shown in FIG. 3, hanging beat gold vehicle 4,4 tower T ₁ through T ₃ to the overhead line, towers T ₁ side drum 1 and the extension line wheel 2 and tension meter 3, and overhead wire wheel 5 and pull winding winding winding machine wire 21 in the engine field provided in tower T ₃ side by winding wire 20 on drum field provided 6 are carried in.

First, a pull wire 21 is stretched on the wheel 4 of each tower, and an end of the electric wire 20 is connected to an end of the wire 21 via a wire fitting 22, and braking is applied by the wire wheel 2. Trolley 5
By pulling the wire 21 to be pulled, the pull wire 21 on the wheel 4 of each tower is replaced with the electric wire 20.

In the above-mentioned wire drawing work, if the wire drawing tension of the electric wire 20 is too large, the electric wire will be over-tensioned, causing the rotation of the wire and the resulting laughing of the strands, causing damage to the wire tower, the tower arm and the wire drawing car. However, an abnormal burden is imposed on the overhead vehicle, which is dangerous. If the wire tension is too small, the electric wire 20 may hang down and come into contact with the ground, possibly damaging the surface of the electric wire 20. In particular, in the case where a house H as shown in FIG. 3 exists immediately below the extension line, there is no possibility that the electric wire 20 contacts the house H and damages the house H from a short notice. I can't say. In order to prevent such a situation from occurring, extension work is carried out while maintaining close contact with the drum site and the engine site, but the distance between the drum site and the engine site is usually several kilometers. Therefore, the state of the electric wire during the extension is not always clear, and depending on the topography, the intermediate extension may not be visible at all.

In the above-described critical lateral over objects passing period is conventionally allowed to monitor the wire ground clearance h deployed special dedicated wardens M ₂ as shown in FIG. 3, the drum field worker M ₁ and the engine field had carried out an extended line while keep in touch by transceiver 7, 7 between the worker M _3. However, lifeguards M ₂ under adverse environment such as mountainous areas it takes a considerable amount of time to arrive at the site, during which time can not be avoided is that prolonged that much man-hours are forced to work waiting.

Furthermore, to say that stay in touch with wardens M _2, differences of nuance in the contact between human beings, obscured by misunderstanding of pronunciation, delay time for the re-confirmation by it, operation mistakes on that panic, procedure It is not an exaggeration to say that there is always a risk of a dangerous accident such as a mistake.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and eliminates the need for a supervisor to be placed in an extension section, so that the extension sag of the electric wire, that is, the amount of sag is always optimal. It is an object of the present invention to provide an automatic control wire drawing system capable of performing wire drawing with high reliability while automatically controlling the wire drawing.

[Summary of the Invention] The present invention is to dispose a speed sensor and a controller on an overhead vehicle and a railway vehicle which are directly related to the formation of the wire drawing sag, respectively, and control the two by mutually controlling the wire tension. While automatically controlling with high precision, an electric wire separation detection sensor capable of detecting the ground height of the electric wire is arranged in an important extended line section where it is necessary to arrange a dedicated monitoring person in the past, and the information of the separation detection sensor is transmitted to the overhead line. Another object of the present invention is to make the automatic control of the electric wire ground height more reliable by providing a structure capable of inputting to a control system of a car, a line drawing car, and a gold-wheeled car having a braking ability arranged on a necessary steel tower.

[Examples] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic explanatory view showing a configuration example of a tension control system of the automatic control extension system 100 according to the present invention, and the same reference numerals as those in FIG. 3 indicate the same configuration. The automatic control wire drawing system not including the slack control system in FIG. 1 is out of the scope of the present invention.

A predetermined winding speed is given to the winding power source 103 by the initial speed setting device 101 and the controller 102 for the overhead wire vehicle 5. The set speed is read by the overhead wire speed sensor 104 and displayed on the speed meter 106, while being converted into a signal by the controller 105 and input to the converter 110, and further input to the controller 111 via the converter 110. By controlling the optimum wire drawing speed with respect to the overhead wire speed in conjunction with the brake 112, the optimum wire drawing tension is automatically controlled. The wire drawing speed at that time is the speed sensor 113
Is displayed on the speedometer 114. further,
The tension automatically controlled at that time is detected by the tension meter 3 and displayed on the tension meter 116.

As described above, the entire electric wire is maintained at the calculated optimum tension. However, even if the tension detected by the tension meter 3 is constant, it cannot be said that the electric wire is at the optimum sag in all the extending sections. . This is because, depending on the span, the electric wire flows backward, whereby the sag increases abnormally only in the specific span, and the sagging of the electric wire occurs appropriately. In this case, the electric wire rises up between the adjacent spans between the sagged spans, and does not appear as a tension fluctuation when viewed from the whole extension tension.

Therefore, it is not sufficient to control the overhead line and the extension line and to control the extension tension. In the present invention, the critical span that could lead to serious accident when such wires sagging of or generated, established the wire spacing detection sensor 10 in place of the full-time watchman M ₂ in the conventional example, the The separation sensor 10 is connected to the converter 110 via a controller 108, and performs an automatic wire sag correcting operation in cooperation with the tension control system.

The distance sensor 10 needs to be configured to automatically detect the distance of the electric wire from the ground, convert the information into a signal, and input the signal to the entire control system. In particular,
Light or a radio wave may be emitted to an electric wire and the time until it is reflected may be measured. However, the method using the transmitting device 12 and the receivers 13 and 14 as shown in FIG. 1 enables more accurate ground clearance measurement.

That, in which the controllable calculator 11, to place the transmitter power supply unit 12 to tower T _1, the control arithmetic unit 11 and the transmitter power supply device
12 is connected by a control cable, and the electric wire 20 and the transmission power supply device 12 are connected by the same control cable.
Reference numerals 13 and 14 denote receivers. In this embodiment, two receivers are installed at a predetermined distance l. However, this receiver does not necessarily require two receivers. If one receiver can receive and accurately detect the phase of the aerial wave, even if one receiver is used, the separation distance is required. Can be measured. The two receivers 13 and 14 are connected to the control calculator 11 by control cables.

A command is sent from the control arithmetic unit 11 to the transmission power supply device 12 to continuously or intermittently load the electric wire 20 with, for example, a high-frequency impulse. Electric wire by the above high frequency impulse load
From 20, an aerial wave based on the impulse is transmitted. The aerial waves are received by the receivers 13 and 14. However, in this case, since it is desired to receive the aerial wave transmitted from the vicinity of the sag of the electric wire 20, the antennas of the receivers 13 and 14 selectively receive the aerial wave transmitted from the sag. It is desired to provide directivity for receiving. Such a directional antenna can be easily obtained as a common one.

Now, the time airwaves originating from the wire 20 is required to be received by the receiver 13 and t _1. The time required for the receiver 14 to receive by a fixed distance l from the receiver 13
The time required for the same aerial wave to propagate at t ₂ and the fixed distance 1 between the receivers 13 and 14 is t ₃ . If these t ₁ , t ₂ and t ₃ are input to the control calculator 11 and calculated, the ground clearance h0 at the sag bottom position of the electric wire 20 can be easily obtained instantaneously.

The detection result obtained as described above is converted into a signal by the controller 108 and input to the converter 110 to control the entire control system, and the result is displayed on the distance meter 109. As the wire separation distance increases, the tension increases, so the braking of the extension line is relaxed.In the opposite case, the braking of the extension line is added, so that the extension of the extension line is always optimal. Controlled.

The wire speed meter 106 already described, the distance meter 1
09. If the wire speed meter 114 and the tension meter 116 are collectively assembled in, for example, the engine field, it is possible for the worker M for the operation of the overhead contact vehicle to perform the wire drawing work while monitoring the entire system alone. It is.

FIG. 2 shows an embodiment of the automatic control extension system according to the present invention, and the same components as those in FIG. 1 are denoted by the same reference numerals.

In this embodiment, a separate 118 is installed as a converter in addition to the above-described 110, and the control system for the overhead contact vehicle and the control system for the extension vehicle are connected by the converter 118, while the tension sensor 115 of the tension meter 3 is newly added. Is also converted into a signal by the controller 117 and input to the converter 118. The control system including the converter 118 is referred to as a tension control system 100a, while the slack control system is separately provided.
Install 100b.

In the slack control system 100b, a wheel 4a installed on a steel tower
Is given braking capability. Such a braking wheel 4a detects when the above-mentioned partial sagging of the electric wire 20 is about to occur, and applies braking to prevent the sagging of the electric wire 20 or the running of the preceding stage. It is. For this control, as shown in FIG. 2, the controller 119 and the brake 12
0 and is also connected to the controller 105 of the overhead contact vehicle. Electrical wire
When the separation sensor 10 detects that the run-in has occurred on the wire 20, the braking command is issued to the gold wheel 4 a, while the winding command to increase the winding speed of the overhead wire car 5 is given, the dripping of the electric wire 20 is prevented. Is prevented. As the brake wheel 4a, a conventional wheel such as a caterpillar wheel or a wheel wheel with a brake can be used.

Incidentally, gold wheel 4b installed in the tower T ₂ in FIG. 2 is a backflow preventing gold vehicle electric wire 20 is rotatable in only one direction so that can not be reverse flow, the sag control laps than tower T ₁ side while preventing the system 100b, is intended to prevent sagging due to backflow from tower T ₂ side, it is desirable to installed in particularly critical lateral over objects pass span.

In addition, 3 'installed immediately before the overhead wire carriage 5 is a tension meter on the overhead wire carriage side, and is installed when it is necessary to control the tension with higher precision.

As described above, automatic control wire drawing with the optimum wire drawing sag is achieved, but in practice the wire drawing distance is very long, and the wire that is often generated at once at a time after the wire drawn by a metal wheel is drawn. Even if the running is detected and the braking of a line-carrying vehicle or the like is changed, if the slack occurs, it does not recover quickly. Therefore, it is preferable to provide a PID (proportional, integral, differentiating) circuit in the controller 108 so that a time constant change can be given. Moreover,
In order to synchronize the speed of the overhead wire 5 with the speed of the overhead wire 2, it is preferable that the controller 105 be provided with a tuning ratio setting device.

[Effects of the Invention] As described above, with the wire drawing system according to the present invention, the following excellent effects can be exhibited.

(1) Since the wire drawing sag is automatically corrected and controlled, the wire drawing speed is stable and high-speed operation can be performed.

(2) Since it is possible to reduce the number of full-time supervisors and workers who respond to them in all places, there is a great effect of saving labor and accompanying costs.

(3) There is no need to wait for the observer to arrive at the site, which can reduce man-hours.

(4) Since no human communication is required, there is no time delay for misidentification or reconfirmation, and it is possible to eliminate accidents caused by human misoperation.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a configuration example of a tension control system of an automatic control wire drawing system according to the present invention. FIG. 2 is an explanatory diagram showing an embodiment of the automatic control wire drawing system according to the present invention.
The figure is an explanatory view showing a conventional tension drawing state. 1: Drum, 2: Rolling car, 4: Gold car, 4a: Braking car, 5: Overhead car, 10: Electric wire separation sensor, 100: Automatic control system, 100a: Tension control system, 100b: Slack control system.

Claims (1)

(57) [Claims] An overhead vehicle (5) while braking by an extension vehicle (2).
In the tension drawing system in which the pulling wire is pulled and the electric wire 20 is drawn between the steel towers, the overhead wire vehicle 5
104 and the controller 102 are installed, and the extension speed sensor 113 and the controller 111 are installed on the extension line 2 so as to be mutually controllable with the overhead contact line side. An electric wire separation detecting sensor 10 and a controller 108 capable of detecting the distance of the electric wire from the ground are arranged in a certain wire extension section, and information obtained from the electric wire separation detecting sensor 10 is used for the overhead wire car 5 and the electric wire car 2. So that it can be input to the control mechanism,
A tension control system 10 configured to be able to control the operations of the extension line 2 and the overhead line vehicle 5 to the optimum extension speed based on the information.
a mechanism and a wheel car 4a having a braking ability and a controller 119 are arranged on a steel tower having an important side object such as the above-mentioned house, and a control system of the separation detection sensor 10 and the wheel car 4a is connected, and the electric wire A slack control system 100b mechanism configured to be able to brake the wheel 4a as necessary based on information obtained from the separation detection sensor 10 has a tension control system 100a mechanism and a slack control system 100b mechanism. An automatic wire-drawing system for electric wires that can be drawn while maintaining and controlling the wire drawing sag to the optimum condition by the cooperation of