JPH0575983B2 - - Google Patents

Description

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

[Conventional technology] When the insulators of power distribution lines are penetrated internally due to abnormal voltage caused by lightning surges, or when leakage current starts to flow due to damage etc., these abnormalities can be detected by
It is not easy to detect, especially from the ground.

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.

It is also possible to use a voltage detection rod using a retractable rod, but in these cases, a reel is attached to the hand of the retractable rod, and a conductor is attached to the outside of the retractable rod between the detection part at the tip of the retractable rod and the reel. It is a connected device, and it is a hassle to let out and wind up the conductor from the reel every time it is expanded or contracted.During the process of pulling out or winding up the wire, it can become sagged, tangled, or get caught on objects, causing wire breakage. In addition to this, they are not necessarily easy to use, as they are heavy, and from a safety standpoint, the conductor wires are exposed outside the tube, posing the risk of electric shock.

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 force of the springs will gradually increase and become excessively strong, and the frictional force of the connecting parts of the telescopic rods will not be able to resist this. In addition to pulling back the telescopic rod, by bending the FRP pipe due to tension, etc.
With the reel winding and springing type, it was difficult to make the telescopic rod longer than 6 m.

However, in order to detect defective insulators in power distribution lines on the ground, the length of a telescoping rod usually needs to be around 10 m, so it has been difficult to detect this problem with these conventional telescoping rods.

[Problem to be solved by the invention]

The present invention enables the detection of defective insulators from the ground with the simplest structure, which is safe and easy to handle, which was not possible with the conventional manual reel winding type or reel winding spring type telescopic rod. The object of the present invention is to provide a defective insulator detector that can detect defective insulators accurately, lightweight, and economically.

[Means to solve the problem]

As shown in Fig. 1, a plurality of insulated FRP pipes expand and contract in the shape of a connecting rod, and when expanded, the insulated FRP pipes 1 in each stage are connected and electrically connected one after another through the conductive FRP 2 on the inner wall. In the defective insulator detector consisting of tube 1, as shown in Figures 2 and 3,
The inner wall of the FRP pipe 1 near the top, excluding the upper insulating FRP band 3, is insulated as a conductive FRP 2 with a conductive FRP band 4 whose part is exposed on the outside surface of the pipe.
The conductivity of the hand FRP pipe C integrated into the FRP pipe 1
As shown in FIG. 3, a ring spring 6 that makes elastic contact with the conductive FRP band 4 is contained in an inner ring spring groove 5 on the outside of the FRP band 4, and a detector 7 and a ground terminal 8 are installed on the outside. As shown in FIG.
One terminal of the detector 7 is connected to the ring spring 6 by a lead wire 10, as shown in FIGS. 2 and 3.
, the other terminal is connected to the ground terminal 8 from the lead wire 11.
These are defective insulator detectors each having a structure in which they are embedded and connected in the detector mounting portion 9 (the connection of the lead wire to the detector is not shown in the drawing).

In FIG. 3, the grounding terminal 8 is provided on the opposite side of the detector mounting portion 9 from the detector 7, but it may be provided on any part of the detector mounting portion 9 depending on the convenience of use.

Then, the lead wire 11 is embedded in the detector mounting portion 9 using resin or the like.

Note that the ground terminal 8 can also be provided at an appropriate position outside the detector 7 itself.

In this case, the detector mounting portion 9 can be simplified since the ground terminal 8 and lead wire 11 can be omitted.

Next, as shown in FIG. 4, the intermediate FRP pipe B shown in FIG. The inner wall of the pipe up to the
Insulating as conductive FRP2 such as carbon fiber
It is composite molded integrally with the FRP pipe 1, and has a structure in which it is rolled out in several stages according to the required length, and when it is rolled out, the upper insulation
Conductive FRP band 4 of FRP1 (B ₁ ) and insulation at the bottom
The conductive FRP2 of FRP1 (B ₂ ) is in close contact,
Each conductive FRP 2 is electrically connected.

Similarly, each intermediate FRP pipe B ₁ , B ₂ , B ₃ ...・B _o
are connected one after another.

Further, the conductive FRP band 4 of B _o and the conductive FRP 2 of the hand FRP tube C are electrically connected in the same way.

Further, at the tip of the intermediate FRP tube _B1 , as shown in FIG.
are connected in the same way as intermediate FRP pipe B.

[Function] [Example] The defective insulator detector of the present invention has a tip FRP pipe A,
Insulated along with intermediate FRP pipe B and proximal FRP pipe C
The inner wall of the FRP tube becomes a conductive FRP tube, and when each FRP tube is pulled out without exposing the live parts on the surface, as shown in Figures 1 and 4,
The conductive FRP band 4 at the lower end of each tube and the distal end portion of the conductive FRP 2 on the inner wall of the next tube contact one after another with a wide cylindrical surface, and are securely connected.

Then, since the ring spring 6 is brought into elastic contact with the outer periphery of the conductive FRP band 4 of the hand FRP pipe C,
This ring spring 6 is attached to the conductive FRP band 4.
It is electrically connected reliably and reliably, and is further connected to the detector 7 by a lead wire 10.

Next, as shown in FIG. 3, the ground terminal 8 and the detector 7 are buried and connected in the detector mounting portion 9.

Thus, a detection circuit is constructed between the tip FRP tube A and the ground terminal 8 via the detector 7.

Moreover, the conductor part is built inside the insulating FRP pipe 1 and the detector mounting part 9, so it is safe without being exposed.

Furthermore, conductive FRP is resistant to abrasion and can withstand the friction caused by repeated use.

In addition, since the conductive FRP 2 is integrally formed on the inner wall of the insulating FRP pipe, it will not peel off.
When carrying, the intermediate FRP pipe B,
In addition, since the tip FRP tube A is all stored in a joint rod shape, it is easy to carry.

As shown in Fig. 1, the method of using the present invention is to connect the grounding terminal 8 to the grounding terminal of the utility pole, then pull out the tip FRP pipe A from the hand FRP pipe C, and
A hook-shaped detection terminal 12 is attached to its tip.

Next, the intermediate FRP pipes B are pulled out one after another in the _order of B ₁ B ₂ B ₃ .

After assembly, hold the FRP tube C at hand and hook the hook-shaped detection part 12 at the tip to the arm 13 of the utility pole supporting the insulator to be measured, as shown in FIG. If there is a defective insulator in the insulator, a circuit is formed from the electric wire to the defective insulator to the armband to the defective insulator detector to ground, and the detected voltage is indicated to the detector.

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 is difficult to visually determine which of the insulators attached to the cross arm 13 is defective, for example, replace all the insulators attached to the arm arm 13 and identify it after taking it home. .

Furthermore, if the hook-shaped detection section 12 is covered with a saddle-shaped insulator, even if the hook-shaped detection section 12 comes into contact with an electric wire, the high voltage of the electric wire will not be applied directly to the hook-shaped detection section 12. It is safe.

Furthermore, since the charging part is located at the tip of the FRP tube C at hand, and the part the inspector is grasping is sufficiently far away from the insulated FRP tube 1, it is possible to accidentally touch the hook-shaped detection part 12. Even if a worker touches a high-voltage line and is energized, there is no effect on the worker and safety can be ensured.

[Effects of the invention] The defective insulator detector of the present invention has a joint rod-shaped insulator.
The inner wall of FRP pipe 1 is made of conductive material such as carbon fiber.
The voltage detection circuit is integrally molded using FRP2 and is not exposed to the outside, and the hook-shaped detection part 12 is also covered with a saddle-shaped insulator, making it easy even if it comes into contact with a live part. is not energized.

Furthermore, the portion of the FRP pipe C at hand that the inspector grasps is sufficiently separated from the parts that are energized, such as the detector 7 and the ground terminal 8, so that it is safe.

Furthermore, the connection between the conductive FRP 2 and the detector 7 is made in elastic contact with the conductive FRP band 4 by the ring spring 6 in the ring spring groove 5 of the detector mounting part 9, so that the ring spring 6 is made of resin composite material. Regardless of the contact connection to the conductive FRP, the electrical contact can be made securely and with high reliability.

Normally, connecting lead wires to conductive FRP is unstable because it cannot be soldered, and if it is bonded using conductive adhesive, there is a risk of the adhesive peeling off during long-term use. However, in the present invention, on the outer periphery of the conductive FRP band 4,
Since the ring spring 6 always provides elastic contact, there is no risk of contact failure, and a highly reliable contact circuit can be constructed.

Furthermore, since there are no lead wires or the like outside the tube, there is no need to worry about them becoming tangled or getting caught on equipment, and there is no fear of wire breakage.

Furthermore, since a lead wire winder or the like is not required, the structure is simple and compact, lightweight, easy to carry, easy to handle, and economical.

In terms of workability, during inspection, defective insulators can be easily detected by simply pulling out the insulating FRP pipes 1 one after another and hooking the hook-shaped detection part 12 onto the cross arm 13.

Next, the conductive part is made of high-strength conductive FRP such as carbon fiber and is integrated into the insulating FRP tube, which increases the strength of the FRP tube and makes it easier to make the tube itself more compact. be.

In addition, the conductive part is FRP integrated with the insulated FRP pipe.
Since it is a pipe, there is no need to worry about it peeling off or breaking.

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

[Other Examples]

The inner wall of the insulating FRP pipe 1 in the shape of a connecting rod according to the present invention is integrally formed as a conductive FRP 2 to provide insulation.
As the FRP tube 1 is pulled out, the conductive parts inside the tube are connected one after another, and a voltage detection circuit is constructed within the insulator. This structure is also applicable to various types of testing equipment that perform measurements from remote locations. It can be done.

[Brief explanation of drawings]

Figures 1 and 5 are explanatory diagrams of the usage state of the present invention, Figure 2 is a partial cross-sectional diagram of the hand FRP pipe, Figure 3 is an explanatory diagram of the detector mounting part, and Figure 4 is an explanatory diagram of the intermediate FRP pipe. Connection state explanatory diagram. 1 is an insulating FRP tube, 2 is a conductive FRP, 3 is an upper insulating FRP band, 4 is a conductive FRP band, 5 is a ring spring groove, 6 is a ring spring, 7 is a detector, 8 is a ground terminal, 9 is a detection Gauge mounting part, 10,1
1 is a lead wire, 12 is a hook-shaped detection part, and 13 is an armrest.

Claims (1)

[Claims] 1. Expands and contracts into a joint rod shape, and when expanded, the insulation of each stage
In a defective insulator detector consisting of multiple insulated FRP pipes, in which the FRP pipes are connected one after another through conductive FRP on their inner walls, the upper insulation near the top of the insulated FRP pipe at hand is
The inside wall part of the pipe excluding the FRP band is made into a conductive FRP band with part of it exposed on the outside surface of the pipe.The outside of the conductive FRP band part of the hand FRP pipe is integrated into the insulating FRP pipe as conductive FRP. The above conductive FRP in the inner ring spring groove
The detector mounting part contains a ring spring that makes elastic contact with the strip, and the detector and ground terminal are installed on the outside. A method for detecting defective insulators, which is connected to a ring spring by a lead wire, the other terminal is connected to a ground terminal by a lead wire, and the lead wires connected to each terminal are buried in the detector mounting part. vessel.