JPH0467920B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a defective insulator detector capable of detecting defective insulators in a power distribution line while the insulator is in energized use.

[Conventional technology]

If the distribution line insulators are penetrated internally by abnormal voltages caused by lightning surges, etc., or if leakage current begins to flow due to contamination, etc., it is difficult to detect these abnormalities, especially from the ground. That was extremely difficult.

There are methods to detect defective insulators using infrared photography and other methods that detect changes in temperature caused by insulator leakage current, but the measuring equipment is expensive, is affected by sunlight and temperature, and requires a certain amount of measurement technology, making it difficult to use on-site. There were restrictions on its use.

There are also voltage detection rods that use a telescoping rod, but in these, a reel is attached to the telescoping rod, and a conductive wire is attached to the outside of the telescoping rod to connect the detection part at the tip of the telescoping rod and the reel. Paying out and winding the conductor with a reel each time it is expanded or contracted is a hassle, and the wire may become loose during winding, get tangled, get caught on objects, break, etc. They were also heavy and not necessarily easy to use.

In addition, by linking the winding spring to the reel,
When the conductor is fed out, it is energized, and when it is wound up,
Some models are designed to be reeled in by the force of the animal, but with this structure, the length of the telescopic rod is at most 6 m.
If the length is 6m or more, if you pull out the telescopic rods one after another, the number of springs will gradually increase,
If the tension becomes too strong, the joint friction force at the connecting part of the telescopic rod will no longer be able to resist this force and the telescopic rod will be pulled back, so it is impossible to extend the telescopic rod over 6 m with the reel winding spring method. It was hot.

However, in order to detect defective insulators in power distribution lines on the ground, the length of a telescoping rod is approximately 10 m, so it has been impossible to do so with these conventional telescoping rods.

[Problem that the invention seeks to solve]

The present invention has the simplest structure, is easy to handle, and is capable of detecting defective insulators from the ground, which was not possible with the conventional manual reel winding type or reel winding spring type telescopic rod as described above. accurately,
Moreover, the present invention provides a lightweight and economical defective insulator detector that can detect defective insulators.

[Means for solving problems]

As shown in Figure 1, insulation that expands and contracts in the shape of a joint rod.
A thin conductor band 2 is provided longitudinally on the inner wall of each stage of the FRP pipe 1 and joined to the inner wall of the pipe, and its lower end 8 is folded back to the outer wall of the pipe and joined to the lower part of the outer wall of the pipe in a ring shape. A plurality of intermediates connected to the ring thin conductor band 3
As shown in Fig. 2, the connecting terminal 4 for connecting the detection terminal 7 is inserted into the FRP tube B, and the thin conductor band 2 inside the tube connects it to the ring thin conductor band 3 below the outer wall of the tube. As shown in FIG.
A terminal FRP tube C leads out to the outer wall of the tube 1 as a voltage terminal 5 and is connected to a voltmeter 6 provided on the outer wall of the tube, and a connecting terminal 4 of the FRP tube A at the tip end as shown in Fig. 4. As shown in Fig. 5, the connecting terminal 7 is connected to the connecting terminal 4 of the tip FRP tube A, and
This defective insulator detector has a structure in which the voltage detection terminal 7 and the ground G can be connected via the voltmeter 6 in the middle by drawing out B ₁ B ₂ ...Bn one after another from the FRP pipe C at hand.

In addition, in Figures 1 and 2, cuts 9 are provided in the folded parts of the thin conductor bands 2 at the lower ends of the tip FRP pipe A and the middle FRP pipe B, so that when the FRP pipes A and B are stored, the thin conductor bands 2. Prevent damage to the folded part.

Also, the thin conductor band 2 and the ring thin conductor band 3
For example, use copper ribbon to join FRP pipes A, B, and C.
When making FRP pipes, connect them as inserts, or
A thin copper conductor is bonded and integrated with an FRP pipe.

For example, the connecting terminal 4 of the FRP pipe A can be connected to the tip of the insulating FRP pipe 1 by making the base of the bolt into a truncated cone shape and inserting it into the FRP pipe A from below and protruding the threaded part. In order to connect the connecting terminal 4 and the thin conductor band 2 without being hooked to the part and coming off, as shown in FIG. Solder connection at the base of the screw part of the detection terminal 7.

By positioning the thin conductor band 2 of the intermediate FRP pipe B ₁ B ₂ ...Bn and the hand FRP pipe C within the insulated FRP pipe 1 as shown in Fig. 6, the insulated FRP When the tube 1 is pulled out, the contact area between the thin conductor band 2 and the ring thin conductor band 3 is covered with insulating FRP.
Since it is located inside the tube 1, the live part is not exposed and is safe.

As shown in FIGS. 4, 7, and 8, for example, the detection terminal 7 has a concave screw portion 10 at its base that is screwed into the connecting terminal 4, and an upper portion that has a hook shape that is hooked onto a arm 16 of a power distribution line, for example. A saddle-shaped covering 11 passes through the shaft of the hook portion and covers the curved portion in a saddle-like manner so as to be movable up and down, and further covers the concave screw portion 10 up to the connection portion with the connecting terminal 4. By covering with the insulating coating 12, the connecting portion can be insulated.

In this case, the saddle-shaped covering 11 covers the detection terminal 7 under its own weight, as shown in FIG.
As shown in the figure, the saddle-shaped covering 11 is a metal arm, and when pushed up, the detection terminal 7 comes into contact with the arm and detects the presence or absence of voltage.

As shown in Fig. 3, the local FRP tube C has a voltage terminal 5 led out from the thin conductor band 2 to the outside of the insulated FRP tube 1, and a voltmeter 6 installed outside the insulated FRP tube 1.
Connect to the terminal.

In addition, in Fig. 3, the voltmeter 6 is connected to the insulated FRP tube 1.
Although the case where the voltmeter is stuck is shown, a gripping metal fitting is attached to the voltmeter, and the voltmeter is held in a required position of the insulating FRP pipe 1 using this gripping metal fitting for use (not shown). It is also possible to do this.

In addition, as shown in FIG. 9, a thin conductor strip 2 on the voltage detection side is attached to the upper part of the inner wall of the insulated FRP tube 1, and a thin conductor strip 13 on the grounding side is separately attached below the strip 2 to the inner wall of the insulated FRP tube. A voltage terminal 5 is provided on the thin conductor strip 2 on the voltage detection side, and a voltmeter terminal 14 and a ground terminal 15 are provided on the top and bottom of the thin conductor strip 13 on the ground side, respectively, using insulated FRP.
It is also possible to have a structure of a hand FRP tube C in which the voltage terminal 5 and the voltmeter terminal 14 are led out from the tube 1 and connected to a voltmeter provided on the outer wall of the tube.

[Function] [Example] The defective insulator detector of the present invention has a tip FRP pipe A,
In both the intermediate FRP pipe B and the hand FRP pipe C, a thin conductor band 2 runs vertically inside the pipe and is joined to the inner wall of the pipe, and its lower end is folded back to the outside of the pipe and connected to the ring thin conductor band 3, so that each When the tube is fed out, as shown in FIG. 6, for example, the ring thin conductor band 3 of the intermediate FRP tube _B1 is brought into contact with the thin conductor band ₂ of the intermediate FRP tube B2. Moreover, ring thin conductor band 3
surrounds the outside and lower part of the intermediate FRP pipe B ₁ , so when the intermediate FRP pipes B ₁ and B ₂ are pulled out, the thin conductor band 2 and ring thin conductor are always connected regardless of their mutual positional relationship. The bands 3 are in contact and the thin conductor bands 2 in B ₁ and B ₂ are electrically connected.

Similarly, the thin conductor bands 2 in the tip FRP pipe A, the middle FRP pipe B, and the hand FRP pipe C are electrically connected by pulling out the FRP pipes one after another. .

Moreover, the thin conductor band 2 and the ring thin conductor band 3 are
For example, if a thin conductor with a thickness of about 0.1 mm and a width of about 10 mm is bonded to the tube wall, each tube can be pulled out and retracted without any problem, and under normal use conditions, there will be no wear and tear.

In addition, when carrying, there is an intermediate part in the FRP pipe C at hand.
The FRP pipe B and the tip FRP pipe A are all inserted in a joint rod shape, and after removing the detection terminal 7,
If you put a cap on the tip of tube C, you can use FRP at hand.
Each tube stored in the tube C can be easily carried without popping out during transportation.

The method of using the present invention is to remove the cap of the FRP pipe C at hand, pull out the FRP pipe A at the tip, screw the detection terminal 7 onto its connection terminal 4 using its concave screw part 10, and then, as shown in FIG. As shown, the intermediate FRP pipes B are pulled out one after another in order of B ₁ B ₂ B ₃ . . . Bn, and each joint is firmly joined.

Next, after connecting the grounding terminal of the voltmeter 6 to a grounding wire connected to the grounding terminal of a utility pole, for example, as shown in FIG. When hooked up, if there is a defective insulator, a circuit is formed from the wire to the defective insulator to the armband to the defective insulator detector to ground, and the voltage is indicated on the voltmeter.

Therefore, by measuring the voltage ranges of healthy insulators and defective insulators in advance and determining the respective ranges, it is possible to easily detect the presence or absence of defective insulators based on the voltage ranges.

In this case, if it cannot be determined on site which of the insulators attached to the cross arm is defective, for example, all three insulators are replaced and the determination is made later.

Next, in the case of the local FRP pipe C in which the voltage detection side thin conductor band 2 is provided on the upper part of the pipe inner wall and the ground side thin conductor band 13 is separately provided below it, the ground terminal 15 is connected to the local FRP pipe C. The grounding terminal is installed near the bottom of the tube, in case the grounding wire is above the person taking the measurement and would interfere with the measurement.

In addition, the saddle-shaped covering 11 shown in FIGS. 7 and 8 is used to insulate and protect the detection terminal 7 from being directly applied with high voltage even if the detection terminal 7 comes into contact with an electric wire. covers the detection terminal 7 with its own weight,
Even in the unlikely event that the detection terminal 7 comes into contact with an electric wire, the detection terminal 7 is protected from being directly applied with the high voltage of the electric wire. And, at the time of inspection, armband 16
As a result, the saddle-shaped covering 11 is pushed up and the detection terminal 7 comes into contact with the cross arm 16, thereby detecting the voltage due to the leakage current of the insulator. Although FIGS. 7 and 8 show a structure in which the saddle-shaped sheath 11 covers the detection terminal 7 by its own weight, the saddle-shaped sheath 11 may be given a certain amount of load or a spring may be used. Pull it toward the concave twisted part 10, and pull the hand FRP pipe C downward during inspection.
Further safety can be achieved by using a structure in which the saddle-shaped covering 11 is pushed up by the armrest and the detection terminal 7 is brought into contact with the armature 16.

In addition, even if the detection terminal 7 etc. is energized to high voltage, the live parts such as the thin conductor band 2 and the ring thin conductor band 3 are built into the insulated FRP tube 1, and the FRP tube itself will not be exposed to high voltage. It can withstand a lot of damage, so you can be doubly safe.

〔Effect of the invention〕

The defective insulator detector of the present invention is a joint rod-shaped insulator.
A thin conductor band 2 is built into the FRP tube 1 to form a voltage detection circuit, so the live parts are insulated.
It is covered with FRP pipe and is safe.

Since the lead wire does not exist outside the pipe, it will not get tangled, get caught on objects, or break, and there is no need for a lead wire winder.
It is simple and easy to use, there is no need to worry about the trouble of drawing out and winding up lead wires, and the inspection can be carried out by simply pulling out the insulating FRP tube 1 one after another, so it is very simple.

Further, since the structure is simple and compact without requiring a take-up reel, it is lightweight, easy to carry, easy to handle, and economical.

Furthermore, like infrared photographic detection, it has many features, such as being unaffected by weather conditions, requiring no skill for inspection, and being able to perform accurate measurements.

[Other Examples]

Thin conductor bands 2 are built into the insulated FRP pipe 1 in the form of a connecting rod of the present invention, and as the insulated FRP pipe 1 is pulled out, the thin conductor bands 2 are connected one after another to form a voltage detection circuit. This structure can also be applied to other measuring instruments such as voltage detectors that perform measurements from a remote location.

[Brief explanation of drawings]

Fig. 1 is an explanatory perspective view of the intermediate FRP pipe B of the present invention, Fig. 2 is an explanatory perspective view of the distal end FRP pipe A,
Figures 3 and 9 are explanatory perspective views of the same FRP pipe C, Figures 4, 7, and 8 are explanatory perspective views of the same detection terminal, and Figures 5 and 10 are explanatory perspective views of the same detection terminal. Fig. 6 is a perspective view for explaining the connection state of the insulated FRP pipe and thin conductor band of the present invention. 1 is an insulated FRP tube, 2 is a thin conductor band, 3 is a ring thin conductor band, 4 is a connection terminal, 5 is a voltage terminal, 6 is a voltmeter, 7 is a detection terminal, 8 is the lower end of the thin conductor band 2, 9
10 is a notch in the lower part of the insulating FRP tube 1, 10 is a concave screw part of the detection terminal, 11 is a saddle-shaped covering of the detection terminal 7, and 12
13 is a thin conductor band on the ground side of the hand FRP pipe C, and 14 is a thin conductor band 13 on the ground side.
voltmeter terminal, 15 is the ground terminal, and 16 is the arm.

Claims (1)

[Scope of Claims] 1. In an insulated FRP pipe that expands and contracts like a connecting rod, a thin conductor band is longitudinally joined to the inner wall of each stage of the FRP pipe, and its lower end is folded back to the outer wall of the pipe, and the lower end of the strip is folded back to the outer wall of the pipe. A plurality of intermediate FRP tubes are connected to a ring thin conductor strip joined in a ring shape, and a connection terminal for connecting a detection terminal is inserted at the tip, and the ring thin conductor below the outer wall of the tube is connected to the thin conductor strip inside the tube. A thin conductor band is longitudinally joined to the inner wall of the pipe, and the terminal of the thin conductor band is led out to the outer wall of the insulated FRP pipe as a voltage terminal, and the voltage terminal provided on the outer wall of the pipe is connected to the FRP pipe. Hand that is connected to the meter
Consists of an FRP tube and a detection terminal connected to the connection terminal of the tip FRP tube. After connecting the detection terminal to the connection terminal of the tip FRP tube,
A defective insulator detector characterized by a structure that allows connection between the detection terminal and ground via a voltmeter by pulling out each FRP tube in sequence. 2. In an insulated FRP pipe that expands and contracts like a connecting rod, a thin conductor band is longitudinally joined to the inner wall of each stage of the FRP pipe, and its lower end is folded back to the outside wall of the pipe and joined to the lower part of the outside wall in a ring shape. A plurality of intermediate FRP tubes are connected to ring thin conductor strips, and a connection terminal that connects a detection terminal is inserted into the tip, and the thin conductor strip inside the tube is connected to the ring thin conductor strip below the outer wall of the tube. A thin conductor strip on the voltage detection side is installed on the upper part of the inner wall of the pipe, and a thin conductor strip on the ground side is connected vertically below the FRP tube, and a voltage terminal is connected from the thin conductor strip on the voltage detection side to the ground side. A voltmeter terminal and a ground terminal are led out of the insulated FRP tube from the thin conductor strip at the top and bottom, respectively, and used as a voltage terminal, a voltmeter terminal, and a ground terminal.The voltage terminal and voltmeter terminal are installed on the outside wall of the tube. Hand that is connected to the meter
It consists of an FRP pipe and a hook-shaped detection terminal, which is covered with a saddle-shaped insulator that can move up and down, and which is connected to the connection terminal of the FRP pipe at the tip. After connecting the detection terminal to the connection terminal of the FRP pipe at the tip,
This defective insulator detector features a structure that allows connection between the detection terminal and ground via a voltmeter in the middle by pulling out each FRP tube from the local FRP tube.