JPH065045U - Defective insulator detector - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a defective insulator detector which is not likely to cause an error in quality judgment due to poor contact and is easy to use even when insulators have different sizes. [Structure] The fixed first arm 2 is attached to the tip of the insulating rod 1.
And a second arm 3 whose distance from the first arm can be changed. The contact at the tip of each arm is a U-shaped contact 10 in the first invention and a magnet contact in the second invention. An arc surface corresponding to the cap fitting 12 of the insulator 11 is formed on each of the contacts.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a defective insulator detector used for detecting a defective insulator having a low insulation on a steel tower.

[0002]

[Prior art]

 In the defective insulator detector, rod-shaped contacts are attached to the tip of a long insulating rod in two steps, and the operator operates the insulating rod to move these rod-shaped contacts up and down the individual insulators on the steel tower. It was made to contact the metal fittings of No.2 and measured the shared voltage or insulation resistance of each insulator. An example of the structure is described in Japanese Patent Application Laid-Open No. 2-192625 of the present applicant.

However, since such a defective insulator detector is manually operated on a steel tower where the scaffolding is unstable and the electric section cannot be approached, the two insulators at the tip of a long insulating rod are used. It is difficult to bring the rod-shaped contactor of the above into proper contact with the intended insulator, and vibration of the insulator device or hand vibration due to wind is transmitted to the rod-shaped contactor, resulting in poor contact between the contactor and the intended insulator. Therefore, there is a drawback that the measured value fluctuates during the time required to judge pass / fail. For this reason, a healthy insulator may be misdiagnosed as a defective insulator due to poor contact. Further, in the conventional defective insulator detector, since the distance between the upper and lower rod-shaped contactors is fixed, it is difficult to properly contact the two rod-shaped contactors with the intended insulator due to the difference in the size of the insulator. There was a case.

[0004]

[Problems to be solved by the device]

 The present invention solves the above-mentioned conventional problems and allows the contactor to make proper contact with the intended insulator, and there is no possibility of causing an error in the pass / fail judgment due to poor contact, and when the size of the insulator is different. It has been completed in order to provide a defective insulator detector that can be properly contacted.

[0005]

[Means for Solving the Problems]

 A first invention made in order to solve the above problem is to mount a fixed first arm and a second arm capable of changing the distance between the first arm and the end of an insulating rod. At the same time, a U-shaped contactor having an arc surface corresponding to the cap fitting of the insulator is attached to the tip of each arm. According to a second invention, a fixed first arm and a second arm capable of changing the distance between the first arm and the first arm are attached to the tip of the insulating rod, and the insulator is attached to the tip of each arm. It is characterized in that a magnetic contactor having an arc surface corresponding to the cap fitting is attached.

[0006]

[Action]

 The defective insulator detector of the first invention is one in which a U-shaped contactor having an arc surface corresponding to the cap metal of the insulator is attached to each arm at the tip of the insulating rod. By inserting these U-shaped contacts into the cap fittings of the insulator, it is possible to perform measurement without causing contact failure. In addition, the second defective insulator detector can also perform measurement without causing defective contact by adsorbing the magnet contact to the insulator cap fitting. Further, in any of the defective insulator detectors, the distance between the second arm and the first arm can be changed, so that it is possible to easily cope with different insulator sizes.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to illustrated embodiments. 1 to 4 show an embodiment of the first invention, in which 1 is an expandable insulating rod, 2 is a first arm fixed to the tip thereof, and 3 is a second arm. The first arm 2 is provided with a measuring capacitor 4 and a coil spring 5 as a vibration absorbing means in the middle thereof. The second arm 3 is attached to the support 6 at the tip of the insulating rod 1 via an auxiliary arm 7, and a spiral wrap 8 is interposed between the second arm 3 and the auxiliary arm 7. Thus, the distance between the first arm 2 and the second arm 3 can be freely changed. The second arm 3 is also provided with a coil spring 9 which is a vibration absorbing means. These coil springs 5 and 9 are made of a material that is excellent in weather resistance and durability and does not stretch even when used repeatedly.

At the tips of the first arm 2 and the second arm 3, a U-shaped contactor 10 made of steel having spring property is attached. As shown in FIG. 3, this U-shaped contactor 10 has an arc surface 13 corresponding to the outer circumference of the cap metal fitting 12 of the insulator 11, and its inner diameter is slightly smaller than the outer diameter of the cap metal fitting 12. Since it is made small, the elasticity can be used to surely fit the cap fitting 12 of the insulator 11.

In the defective insulator detector of the first invention constructed as described above, the worker holds the base portion of the insulator rod 1 in the same manner as the conventional detector, and the contactor at the tip of the insulator is held on the steel tower. The insulation is measured by contacting the cap fitting 12 of 11. However, in the present invention, since the U-shaped contactor 10 having the arc surface 13 corresponding to the cap fitting 12 of the insulator 11 is used as the contactor, the U-shaped contactor 10 faces the cap fitting 12. By pushing in, the U-shaped contactor 10 and the cap fitting 12 can be surely brought into contact with each other. In particular, if the first arm 2 and the second arm 3 are provided with vibration absorbing means composed of coil springs 5 and 9 as in the embodiment, the vibration of the insulator device and the vibration of the operator's hand due to the wind are U-shaped. Since it does not reach the linear contactor 10, no contact failure occurs. For this reason, it is possible to reliably read the measured value.

Further, in the defective insulator detector of the present invention, since the distance between the first arm 2 and the second arm 3 can be elastically changed, the U-shaped contactor 10 at the tip of one of the arms is first of all. Is engaged with the cap metal fitting 12 of the insulator 11, and then the insulating rod 1 is operated to open the other arm against the spiral spring 8 and the U-shaped contactor 10 at the tip thereof is connected to the other insulator 11 Can be engaged with the cap fitting 12 of FIG. Therefore, it can be easily used for various insulators of different sizes.

FIG. 5 to FIG. 7 show an embodiment of the second invention, in which the contacts at the tips of the first arm 2 and the second arm 3 are arcs corresponding to the cap fittings 12 of the insulator 11. It differs from the first device only in that a magnet contact 15 having a surface 14 is used. The magnet contactor 15 is attracted to the cast iron cap fitting 12 and the arcuate surface 14 can maintain a reliable contact, so that stable measurement can be performed as in the first invention. In any defective insulator detector of any of the inventions, the operator needs to operate the long insulating rod 1 on the steel tower, so the balance weight 16 should be attached to the rear end portion of the insulating rod 1. preferable.

[0012]

[Effect of device]

 As described above, since the defective insulator detector of the present invention can make the contactor contact the target insulator correctly by devising the contactor, it may cause an error in the pass / fail judgment due to the contact failure. There is no. Further, since the defective insulator detector of the present invention can change the distance between the first arm and the second arm, correct measurement can be easily performed even when the size of the insulator is different. Therefore, the present invention has an extremely large practical value as a defective insulator detector that solves the conventional problems.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the first invention.

FIG. 2 is a plan view showing an embodiment of the first invention.

FIG. 3 is a perspective view showing a contact of the first invention.

FIG. 4 is a front view showing a usage state of the first device.

FIG. 5 is a front view showing an embodiment of the second invention.

FIG. 6 is a perspective view showing a contact of the second invention.

FIG. 7 is a front view showing a usage state of the second invention.

[Explanation of symbols]

 1 Insulating Rod 2 First Arm 3 Second Arm 5 Coil Spring as Vibration Absorbing Means 8 Spiral Spring 9 Coil Spring as Vibration Absorbing Means 10 U-Shaped Contactor 11 Insulator 12 Cap Metal Fitting 13 Arc Surface 14 Arc Surface 15 Magnet contact

Claims (3)

[Scope of utility model registration request] 1. A fixed first arm and a second arm capable of changing a distance between the first arm and the first arm are attached to the tip of the insulating rod, and a cap metal fitting of an insulator is attached to the tip of each arm. A defective insulator detector characterized in that a U-shaped contactor having an arc surface corresponding to is attached. 2. A fixed first arm and a second arm whose distance between the first arm and the first arm can be changed are attached to the tip of the insulating rod, and a cap metal fitting of an insulator is attached to the tip of each arm. A defective insulator detector characterized in that a magnet contactor having an arc surface corresponding to is attached. 3. The defective insulator detector according to claim 1 or 2, wherein each arm is provided with a vibration absorbing means for preventing the vibration from the insulating rod from being transmitted to the tip portion.