JPS6360574B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a receiving device for detecting pulse current of an overhead power distribution line and searching for a ground fault point, and in particular, a receiving device that detects a pulse current of an overhead distribution line and detects a grounding fault point. This invention relates to a receiving device with improved characteristics.

[Prior art]

2. Description of the Related Art Conventionally, a rod-shaped receiving device 1 as shown in FIG. 1 has been used to detect ground fault points on overhead power distribution lines. The device 1 includes a hook-shaped detection section 2 that detects a magnetic field generated in the distribution line by a pulsed current, a receiving section 3 made of insulating pulp and having a built-in device for signal processing the detected pulsed current. Receiving section 3
The display section 4 is exposed on the lower surface of the display section 4 and displays the results of the signal processing. The area between the detection part 2 and the reception part 3 at the tip of the rod-shaped body protects the connecting cable that connects them to each other, and also insulates the reception part 3, the display part 4, and the accident point investigation worker from the high voltage current flowing through the overhead power distribution line. They are connected by a hollow insulating operating rod 5 to form a rod-shaped body as a whole. Furthermore, a hanging band 6 is provided so that it can be easily carried when going up and down to the telephone pole and when moving. FIG. 2 shows an example of a method for detecting a ground fault point using the above-mentioned receiving device. In the figure, it is assumed that a grounding fault occurs in the fault resistor 9 at a fault point 8 of the overhead power distribution line 7. A high voltage pulse is applied by a high voltage pulse generator 12 via a lead wire 11 between the overhead power distribution line 7 and the ground 10 in the power outage section due to the accident. The pulse current due to the high voltage pulse flows through the overhead distribution line 7, passes through the fault resistor 9 at the fault point 8, passes through the ground 10, and returns to the pulse generator 12 forming a circuit. Here, if the accident point detection worker 13 holding the receiving device 1 climbs up each utility pole 14 installed along the overhead power distribution line 7 one after another and confirms the magnetic field generated by the pulsed current, Accident point 8
As the magnetic field suddenly disappears, the accident point 8 can be easily discovered.

Figure 3 is a diagram of a high-voltage three-phase, three-wire, horizontally arranged, two-circuit co-frame. In the figure, the standard vertical distance l2 between the upper phase line 15 and the lower phase line 16 is 0.9 to 1.3 m. The receiving device 1 is as shown in the same figure.
The length l1 is such that fault detection can be carried out on the circuit line, and the fault point detection worker 13 can work at a certain distance from the overhead distribution line 7 through which high voltage current flows.
is made to be approximately 2m long.

However, the conventional receiving device 1 as described above
According to the above, the accident point detection worker 13 must carry and operate the receiving device 1, which is longer than the worker's height, when ascending or descending from the utility pole 14, when moving, or when storing it, which makes handling and operability difficult. It was very bad, and there were major problems with work safety.

[Summary of the invention]

The present invention has been made in order to eliminate the above-mentioned drawbacks, and by providing a bent part in the middle of the rod-shaped receiving device, an accident point investigation worker can easily hold the receiving device when ascending and descending from the utility pole, when moving, and when storing the device. It can be folded in the middle to make it compact and can be easily assembled into a rod-shaped body during operation, improving handling and operability and improving operational safety. This will be explained in detail below using examples.

[Embodiments of the invention]

4 to 6 are simplified configuration diagrams showing one embodiment of a receiving device according to the present invention. FIG. 4 shows the assembled state, FIG. 5 shows the bent state, and FIG. 6 is a sectional view of the bent portion in the assembled state. The hook-shaped detection part 20 is a hollow insulating operating rod 2
1 and a receiving section 22 composed of an insulating pipe.
The display section 23 is connected to the receiving section 22 . At the lower end of the insulating operating rod 21, a fixing pipe 25 having an inner diameter approximately matching the outer diameter of the tube housing pipe 24 and the upper end of the insulating pipe of the receiving section 22 is provided. One end of the expandable bellows-shaped flexible tube 26 is a tube storage pipe 24
The other end is fixed inside the tip of the receiving section 22 with a connector 24b. The hanging band 27 is connected to both ends of the receiving section 22 since the receiving device is foldable. Here, in this receiving device, as shown in FIGS. 4 and 6, the upper end of the receiving section 22 is fitted into the fixing pipe 25, so that the flexible tube 26 is stored in the tube storage pipe 24. By using the stretchable flexible tube 26 at the bending part, consideration is given so that the protection of the internal connection cable and the waterproofness of the entire receiving device are not impaired. In addition,
In this example, the length l3 in the assembled state is 2 m.
The length l4 in the folded state is 1.2 m.

The case where the ground failure point 8 shown in FIG. 2 is investigated using the receiving apparatus according to the present invention as described above will be described below.

The accident point investigation worker 13 pulled out the upper end of the receiving section 22 from the fixing pipe 25, climbed the telephone pole 14 with the receiving device bent as shown in FIG.
After determining the working position on the pole, as shown in FIGS. 4 and 6, the upper end of the receiving part 22 is fitted into the fixing pipe 25 and assembled into a rod-shaped body, and the magnetic field generated by the pulse current of the overhead distribution line 7 is After the inspection is completed, the receiver 22 is pulled out from the fixing pipe 25, returned to the bent state shown in FIG. In this way, along the overhead power distribution line 7 the high voltage pulse generator 8
If you investigate sequentially from the side, you can easily find the grounding accident point 8.
can be discovered.

In this embodiment, the receiving section 22 is constructed by being housed in an insulating pipe, but the shape may be a box-shaped container instead of a pipe-like shape. Although the length l4 in the bent state is 1.2 m, it can be changed by changing the length of the receiving section 22 in consideration of the type of overhead power distribution line 7 to be investigated.

〔Effect of the invention〕

As explained above, according to the receiving device according to the present invention, since a bending portion is provided in the middle of the rod-shaped receiving device so that it can be bent, accidents can occur in places with very poor working conditions such as on top of utility poles. For workers conducting point surveys, the length of the receiver can be made shorter than their own height when climbing and moving to utility poles to improve handling and operability, and by assembling and lengthening it at the time of surveying, it is possible to This has the effect of making it possible to search for circuit lines and to maintain a safe distance from high-voltage power lines.

[Brief explanation of the drawing]

Fig. 1 is a simplified configuration diagram showing an example of a conventional receiving device, Fig. 2 is a principle diagram showing a method of fault detection for overhead distribution lines, and Fig. 3 is a simplified configuration diagram showing an example of a pole installation for a two-circuit line. 4 to 6 are simplified configuration diagrams showing one embodiment of a receiving device according to the present invention. 20...Detection unit, 21...Insulating operation rod, 22
... Receiving section, 23 ... Display section, 24 ... Tube storage pipe, 25 ... Fixing pipe, 26 ...
Flexible tube, 27...hanging band.

Claims (1)

[Scope of Claims] 1. A receiving section that has a detection section at its tip that detects the pulsed current supplied to the distribution line, and that processes the detected pulsed current as a signal, and a display section that displays the signal-processed results. What is claimed is: 1. A receiving device comprising a rod-shaped body having a bending portion in the middle of the rod-shaped body. 2. The receiving device according to claim 1, wherein the bending portion is composed of a flexible tube that connects divided portions of the rod-shaped body to each other.