JPS606857A - Self-running type rust detector - Google Patents

Abstract

PURPOSE:To perform labor-saving to rust inspecting operation by providing a driving motor for self-running to a device which detects the rust of a cable while suspended from the cable to be inspected. CONSTITUTION:The rust detector 1 has a couple of driving wheels 2a and 2b horizontally and is equipped with the driving motor 6 which drives those driving wheels 2a and 2b. The couple of driving wheels are tapered pulleys which decreasing in diameter toward one-side terminals of driving shafts 3a and 3b, and a rust detection coil 11 is suspended between the driving wheels with its contact head part 12 down in the perpendicular direction of the rust detector 1. A cable 17 to be inspected is inserted from an opening part 16 formed between an upper cover 14 and a lower cover 15, guided along a guide plate, and arranged at an insertion part formed right under the rust detection coil 11 and driving wheels 2a and 2b. The detection signal from the rust detection coil 11 is transmitted as an FM signal, and the driving motor 6 is operated remotely from the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a self-propelled rust detection device that can detect the state of rust on overhead wires on the ground.

[Technical Background of the Invention] Bare or insulated power transmission lines and distribution lines are susceptible to rust depending on the usage conditions and period of use.

Bare overhead wires can be visually inspected for photogenicity of culm rust, but coated wires cannot be inspected visually due to the presence of the coating, and inspection itself is difficult. However, it is difficult to quantitatively determine the extent to which rust has progressed.

As rust progresses, the structural strength of overhead wires decreases, increasing the risk of them being cut by strong winds.

[Problems with conventional technology] Determine the degree of rust occurrence! ■In order to understand the specifics, for example, it is possible to measure the conductivity, but it is possible to
There are various problems with the method of processing the button detection signal, the improvement of measurement accuracy, the method of determining the degree of rust occurrence, etc., and it has not yet been put into practical use.

Further, it is desirable to carry out this type of inspection while the cable is live, so that it is safe and easy to handle, and it is also necessary to eliminate the influence of the load current flowing through the cable.

For this reason, the present inventor faithfully captures the detection signal corresponding to the occurrence of rust and transmits it as an FM wave, receives this with a receiver on the ground, determines the degree of rust occurrence, and determines whether the wire is live or not. We have devised a precision detection device that can detect the degree of rust on cables under test without being affected by the load current.

This detection surface is structurally easy to attach to the overhead wire, and also prevents it from falling off from the overhead wire. - It runs smoothly and easily absorbs variations in the outer diameter of parts of the cable to be inspected, such as straight sleeves.

[Problems with Background Art] However, the above precision detection device has the following problems.

(1) Since the precision detection device is not equipped with a drive source for self-propulsion, in order to run it on the cable to be inspected, tie a rope to one end of the precision detection device and attach the rope to two utility poles. Workers must be pulled from either side of the river, which requires labor and time.

(2) In order for the operator to drag the precision detection device, the traveling speed of the rust detection device is constant lt1'', so from the finally obtained signal processing chart 1~, the non-complex part and the chain part are separated. It is difficult to accurately overturn the judgment.

3) Because the aerial transport rope hangs down, the rope itself shakes greatly when crossing a busy road or in strong winds, making it dangerous. be difficult.

(4) In addition to the data measurement worker, it requires a pulling/pulling worker, making it difficult to save labor.

(5) The contact between the precision detection coil for detecting the button detection signal and the cable under test is unstable, making it difficult to improve the precision of detection.

[Object of the Invention] The present invention has been made based on the above circumstances, and is a self-propelled vehicle capable of self-propelling the inspected Kuupluch without the need for a towing operator, and capable of detecting the state of a rusted cow with high accuracy. The object of the present invention is to provide a driving illusion detection device.

[Summary of the Invention J The present invention comprises: a pair of drive wheels running over a cable to be inspected; a drive motor driving the drive wheels via a power transmission mechanism; A self-propelled rust detection device having a precision detection coil for obtaining a button detection signal vertically disposed in contact with one surface of a couple to be inspected, the drive motor being remotely controlled from the ground. Accordingly, the precision detection device on the cable to be inspected is moved forward, stopped, and retreated. (
! 7ru J: Overturn 1 as a characteristic.

[Embodiments of the Invention] The principle of the precision detection device of the present invention is to generate an eddy current on the outer surface of the cable to be inspected, detect the resulting magnetic flux with a precision detection coil, rectify this button detection signal, It switches at a predetermined frequency, FM modulates it, and transmits it to the precision detection signal transmitter.
81, and obtain the button detection signal which is demodulated and rectified.
The high conductivity detection area has been expanded to enable determination of the degree of rust occurrence, but this book! The main part of Ming is the above rust detection! Since it is in the mechanical part of the device, a detailed explanation will be omitted.

1 to 8 show the first part of the precision detection device according to the present invention.
FIG. 9 is a diagram showing a second embodiment of the above device.

The first embodiment has a drive source for a drive vehicle that runs on the cable to be inspected, and a precision detection coil is arranged in the vertical direction to ensure contact between the pre-inspection wobble and the precision detection coil, and The present invention is characterized in that it is equipped with a pressing mechanism that forcibly presses the cable to be inspected toward the precision detection coil.

That is, in FIGS. 1 to 8, the rust detection device V!
11 is a drive wheel 2 in the horizontal direction of this device 1.
It has a and 2b.

The drive wheels 2a, 211 are fixed to drive shafts 3a, 3b supported by the frame 4, and the drive wheels 2a, 31
] Chain sprockets 1 to 5a and 5b are fixed to one end of the chain.

A drive motor 6 is installed at the lower part of the frame 4, and an output shaft 7 of the drive motor 6 is connected to a diesel engine block 1 to 8.
is fixed.

Chains brockets 1-5 of these V-drive cars 2a and 2b
a, 5b and drive motor 6 chain 2210971~
An endless boom 9 is stretched between the holes 8 and 8.

Therefore, -C, the driving force of the drive motor 6 is driven by the chains 1--8 through the endless chain 9.
Chain subs fixed to 113a and 3b [1 piece 1 to 5
a, 5b, and the driving wheel 2a.

2b will be driven at a predetermined speed.

The drive unit 6 uses, for example, a DC keyed motor and is driven by a battery 10.

In addition, in this embodiment, the drive wheels 2a, 2b have drive 1 FIJ shafts 3a, 3, as is clear from the tlQi plane view shown in FIG.
1+ and overlaps with a tapered pulley having a tapered angle θ whose diameter decreases toward one end.

Between the pair of driving wheels 2a and 2b, a precision detection coil 11 is vertically installed in the vertical direction of the precision detection device 1 with its contact head 12 facing downward.

Directly below the precision detection coil 11 and the drive wheels 2a and 2b, a cable insertion part 13 to be inspected is formed, and a cable is inserted into the insertion part 13 from the frontage part 1G formed between the upper cover 14 and the lower cover 15. The inserted cable 17 to be inspected is guided and placed along the guide plate 18.

A pair of fixed wheels 19a and 19b are rotatably fixed to the frame 4 to support the opposite side surface of the cable 11.

A suppressor type 2 is located approximately in the middle of the fixed wheels 19a and 19b.
0 is set ().

That is, during this pressing 20, the pressing roller 21 is rotatably fixed to one end of the swinging arm 22, and the swinging arm 2
The other end of 2 is swingably supported by a frame 23 (see FIG. 5) so as to form a predetermined angle with respect to a horizontal plane.

A pin 24 is inserted into the end of the swinging arm 22 directly below the pressure roller 21, and one end of a tension coil spring 25, 25 is pulled at both ends of the pin 24.
5. The other end of 25 is a flange 11a, 1 for removing the precision detection coil 11, as shown in FIG. 7 and FIG.
11+] Pull it to the tip of the bolt 26 (1
)&no.

Therefore, the swinging arm 22 has a tension spring 25
．． 2! The cable 17 to be inspected, which is drawn to the precision detection coil 11 side by
9a, 191) side.

Furthermore, the cable to be inspected 17 is equipped with a straight sleeve 17a having an outer diameter larger than the outer diameter of the cable.
When the precision detection device 1 passes through this linear sleeve 17a, the pressure roller 21 follows the outer diameter of the sleeve 17a and is pushed backward, and the swing arm 22 moves as shown in FIGS. 4 and 5. The position is vertically downward as shown by the chain line.

Even in the above case, since good contact with the fine detection coil 11 is maintained, no particular abnormality occurs in the generation of the desired fine detection signal.

Next, a mechanism for preventing separation of the device 1 from the cable to be inspected 17 will be explained.

That is, this 1 [removal prevention t
After being inserted, the front 1111 opening 16 is closed. To describe this in more detail, as shown in FIG. 6, one end of the tension coil spring 28 is fixed near the bent part of the hanger 27, and the other end is attached to the frame 4 and fixed to the spring retaining fitting 29. However, the hanging hand 27 is constantly pulled downward by the tensile force of the coil spring 28 f
Configure it so that it is

With the above configuration, the precision detection device 1 is attached to the cable to be inspected 17.
When the operator holds the hanging handle 27 and hangs the device 1, the device 1 will fall downward due to its own weight and an opening 16 will be formed between the upper cover 14 and the lower cover 15. It is formed.

Therefore, during this time, the above-mentioned equipment 'fi1 is mounted on the cable to be inspected 17 via the part 16, and the hand is placed on the cable 17 from the hanger 27.
! 1 llu, the hanger 2I is pushed down by the tensile force of the tension spring 28, and the tip 2 of the hanger 27 is pushed down.
7a and 27a close the opening 1G and serve as a mechanism for preventing 11112 from being inspected from the cable 17.

In addition, handles 29a are provided at both left and right ends of the precision detection device 1.
, 29b are fixed and enable position adjustment, manual running, etc. on the cable 11 to be inspected.

Next, a second embodiment of the present invention will be explained with reference to FIG.

In this embodiment, one driving vehicle 2a, . . .
211 is a V-shaped sliding width 200 having a substantially V-shaped groove in cross section. By using this ■ shape slider 200, the precision detection coil ( ) installed in line with the center axis (
Cf) Any good contact can be maintained, and even when passing over the linear sleeve 17a, the device 1 itself will not be shaken by simply moving in the vertical direction.

Furthermore, when using the above ■-shaped pulley 200 (J, as described above, good contact with the precision detection coil can be maintained,
It is not necessary to provide the pressing die 20 as in the first embodiment, and the configuration of the apparatus can be simplified.

In FIG. 9, the same parts as in the first embodiment are given the same reference numerals, and detailed explanation thereof will be omitted.

[Effect of explanation] The present invention is equipped with a self-propelled drive source that runs on the cable to be inspected as described above, and also maintains reliable contact with the precision detection coil, thereby saving labor in precision inspection work. At the same time, unlike manual movement of the pull rope cage, a constant running speed can be maintained using the drive motor, making it possible to accurately determine the non-rusted areas and chained areas from the final chart, which improves inspection accuracy. can be improved.

Furthermore, since there is no need for a pull rope to avoid running the precision detection device, inspection work can be carried out without any problems even when crossing roads with heavy traffic, and it can also be used in cases of strong winds. This has the effect of making it possible to avoid dangers such as getting caught.

[Brief explanation of drawings]

1 to 8 show the first part of the precision detection device according to the present invention.
FIG. 1 shows the entire hemogram, FIG. 2 shows a side view, FIG. 3 shows a partially cutaway front view, and FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 3, FIG. 5 is a cross-sectional view taken along the line B-B in FIG. 3, and FIG. 7 and 8 are a partially cutaway front view and a side view showing a press-type removal means, and FIG. 9 is a partially cutaway side view of a precision detection device showing a second embodiment of the present invention. It is a diagram. 1... Precise detection M same 2a, 2b... Drive vehicles 3a, 3
b... Drive shaft 4... Frame 5a, 5b... Chain block 1-6... Drive motor 7... Output shaft 8... Chain sprocket 9... Endless chain 10...・Battery 11...
・Precise detection coil 12...Contact head 13...Tested cable insertion part 14...Two-part cover 15...Lower cover 1G・
... Opening 17... Cable to be inspected 17a... Straight sleeve 18... Guide plates 19a, 19b.
・Fixed car 20 ・Suppressing 21 ・Press roller
22... Swinging arm 23... Frame 24...
Bin 25... tension coil spring 26... bolt 27... hanging hand 28... tension coil spring 29a, 291)... handle 2
00... V-type pulley application agent Gobu Doyama Kikuchi 1) Shin Akira Figure 1 Figure 2 Figure 7 Figure 4 Figure 1 Figure 5 Figure 6; i'77 Figure 8 Figure 9 Tokyo Metropolitan Government 1-5-7 Sakuragawa, Itabashi-ku

Claims (4)

[Claims] (1) A pair of drive cars running on the cable to be inspected,
A drive motor that drives this drive wheel via a power transmission mechanism, and a drive motor that is arranged between the pair of drive wheels and vertically in contact with the upper surface of the cable to be inspected! A self-propelled barge detection device comprising: 8 ft detection coils for obtaining precise detection signals. (2) The self-propelled rust detection device according to claim 1, wherein the drive wheel is a V-shaped pulley having a substantially V-shaped cross section. (3) A pair of drive wheels that run on the cable to be inspected, a drive motor that drives the drive wheels via a power transmission mechanism, and a pair of drive wheels that are arranged on a side surface of the cable to be inspected, and a drive motor that drives the drive wheels via a power transmission mechanism; a rotatable fixed wheel that supports the fixed wheel; a rotatable suppression wheel that is disposed on the opposite side of the fixed wheel and the cable to be inspected and suppresses the cable to be inspected with a predetermined pressure by elastic means; 9=J is disposed between the driving wheels of J, and is in contact with the upper surface of the cable to be inspected. - A self-propelled rust detection device characterized by: (4) The self-propelled rust detection device according to claim 3, wherein the drive wheel is a tapered pulley having a taper that widens toward the free end of the drive shaft.