JPS5919820A - Abnormality detecting device of electric instrument - Google Patents

Abstract

PURPOSE:To look straight at the displacement extent of a needle, and to simplify a resetting operation of the needle, by providing a coil spring for providing a resetting operation to a cylindrical needle to which the circumference of the center hole of a round plate spring whose circumference is fixed into a body is brought into engaged contact and is supported. CONSTITUTION:A detecting device is fitted at each gas section or at each fixed interval on the outside wall of a vessel for storing an electric instrument body. When vibration is generated in the outside wall due to abnormality of the inside of the electric instrument, a needle 19 vibrates in the same way as usual. The moving extent of the needle 19 can be seen directly from the outside of a cover 12. Paint, etc. are coated on a display part 19a so as to be easily visible, therefore, a state of operation can be seen with eyes. When resetting the needle 19, when the inside circumferential part of a plate spring 16 is separated from the needle by removing a cover holder 13 and the cover 12, and drawing up a resetting fork 20 which is brought into engaged contact with the lower face of the inside circumference of the plate spring 16, the needle 19 is pushed back downward by a resetting coil spring 21 and becomes its original state. In this way, the resetting operation can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an abnormality detection device for electrical equipment, and more specifically, the present invention relates to an abnormality detection device for electrical equipment. This invention relates to an abnormality detection device for electrical equipment that detects and displays information using vibrations propagating to an outer wall.

Conventionally, high-voltage equipment is housed together with insulating gas in a sealed container, and in electrical equipment that is used in combination with multiple equipment, if an abnormality occurs in one equipment, such as an internal discharge or an internal fault, it cannot be seen from the outside. This made it extremely difficult to detect abnormalities early. It has been found that vibrations are generated on the outer wall of the container when such an abnormality occurs, and a detection device that utilizes this vibration has been proposed. FIG. 1 shows a conventional detection device of this type.

In the figure, a limit switch 3 that outputs an electric signal to a lid connected by a threaded part la is provided on the upper part of a body l, and a cylindrical mover ψ having a circumferential groove G/a is housed inside the body. has been done. The pair of leaf springs 6, whose peripheries are clamped and fixed by the body/lid λ and the spacer S, have notches 6b radiating from the center hole 6a as shown in FIG. 2, and the diameter d of the center hole 6a. is smaller than the diameter of the movable ring, and the periphery of the center hole 6a is the circumferential groove Fa of the movable ring.
is in pressure contact with. The body l is fixed to the container 7 of the electrical equipment main body with bolts. With such a configuration, if an abnormality occurs in the electrical equipment inside the container 7 and the outer wall of the container 7 vibrates,
This vibration propagates through the leaf spring 6 from the body, causing the movable arm to vibrate. Since the diameter of the movable element l is larger than the inner diameter d of the center hole 6a of the leaf spring B, the leaf spring 6 is attached to the movable element at an angle θ/,
They are in contact with each other with θ. By keeping all the angles of the leaf springs 6 in the same direction, the movable element is narrowed by the leaf springs 6 and cannot move, that is, generate relative displacement, unless the leaf springs 6 are expanded. be. When this movable element l vibrates, as shown in Fig. 1, when it moves upward, if the force exceeds the force that expands the leaf spring t, it will move upward, and if a force in the opposite direction acts, it will be narrowed by the leaf spring 6, and the movable element l will move upward. It stops moving.

When such an operation is repeated, the movable element V moves upward little by little, and finally the limit switch 3 is pressed to switch the contact and output as a signal indicating an external construction error.

In this way, the detection device at the location where the abnormality has occurred is operated to notify the outside.

However, in the conventional device as described above, even if there is an operation immediately before switching the contact signal of the IJ Mitswitch J, it does not appear as a signal to the outside.

Furthermore, if this state is left as it is, there is a risk that an abnormal signal will be generated if it receives shocking vibration from the outside, so the mover ψ must be returned to its original position. For this reason, the trap has the body l and lid screwed into place.
It was necessary to take out the internal movable element, leaf spring 6, and spacer J and reassemble it, which had the drawback that the work was difficult depending on the position where it was attached to the electrical equipment. .

This invention is an attempt to eliminate the above-mentioned drawbacks of conventional devices, and is a method for detecting abnormalities in electrical equipment that allows the displacement of a movable element to be directly viewed from outside the device and facilitates the operation of returning the movable element to its original position. The purpose is to provide a device.

The present invention will be described below with reference to an embodiment shown in FIGS. 3, 1, and 5. In the figure, a transparent lid 12 is attached to the body // by screwing the lid holder /3 onto the threaded part /la and attaching it via a seal/da, so that the leaf spring /i inside the body l is not bent more than necessary. Holding plate/g fixed to spacer l left and body l/ with screw/7 and leaf spring 16
The surrounding area is clamped and fixed. The leaf spring 16 is shown in FIG. The upper end extends into the inside of the lid/2 and is an oak display end/9a, and a coil spring 2/ is inserted between the steps of the fork 20 and the mover 19 to return the mover/wa. ing. The lower end of the body // is connected to the bottom plate 21 by a screw 23 via a packing J, 2. A large number of circumferential grooves /qb are formed in the mover /9.

Next, the effects will be explained. This detection device is attached to the outer wall of the container housing the electrical equipment main body for each gas category or at regular intervals. When the outer wall vibrates due to an abnormality inside the electrical equipment, the mover vibrates in the same manner as in conventional devices. In this way, the amount of movement of the movable element 19 can be seen directly from the outside of the lid 12. Display section/9a
The parts are coated with paint to make them easier to see, so you can see the operating status with your own eyes. To return the movable element 19, remove the lid holder /3 and the lid /2, and remove the leaf spring /6.
When the inner circumference of the plate spring /q is separated from the mover /9 by pulling up the return fork -〇 that engages the lower surface of the inner circumference of the mover /q, the mover /q is pushed downward by the return coil spring 2/. It will be returned to its original state. In this way, the binding return operation can be simplified, and since many small circumferential grooves lqb are provided in the portion of the diameter D (>cl) of the movable element lq, the movable element /9 is free from external impact vibrations. It is difficult to move due to high frequency vibrations such as SOθH caused by internal abnormalities.
It operates on vibration at zt. Furthermore, since all components related to the operation of the components are arranged concentrically, the correct position of each component can be ensured by reducing the gap between the mating parts. Since it will be used outdoors, the connecting parts that communicate with the outside air are made to be airtight with packing/gums.

The mover/9 moves little by little while vibrating, and does not move all at once using a toggle spring. Also, unless a force greater than the force exerted by the leaf spring /6 acts on the mover /9, it will begin to move.
It can be changed depending on the relationship between the diameter d of the plate spring 6, the material of the plate spring 6, the plate thickness, the spring characteristics determined by the length 9 width, and the weight of the mover, and the optimum value can be set according to the target equipment. It is possible to put it into operation simply by attaching it to the outer wall of the container of electrical equipment.

According to the above-mentioned 5Vc, the present invention has the following advantages: the amount of displacement of the movable element can be directly observed from the outside, the returning operation of the movable element is simple, and the assembly is easy and the operation is stable.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a conventional device, FIG. 3 is a partial plan view, FIG. 3 is a vertical cross-sectional view of an embodiment of the present invention, and FIG. FIG. 5 is also a perspective view of the main part. //...body, //a...screw part, /2...lid, /3
・・Lid presser, /'/,,,7.2・・Patsukin, /S
... Sveza, //, ... Spring plate, /Aa ... Center hole,
/4b...notch, /7. ．． 2J...screw, 7g...presser plate, /9...mover, /9a--display end, /9b...
Circumferential groove, Co θ...Fork 1.2/...Coil/Z Ne,
211...Bottom plate. Figure 2, Figure 3, Figure 4, bCI, Figure 5, Procedural amendment (voluntary), Commissioner of the Patent Office, 1, Indication of the case 'M Gansho A; 7-13141
No. 411 No. 2, Name of the invention Abnormality detection device for electrical equipment 3, Representative to the person making the amendment Katayuni Kata 4, Agent 5, Subject of amendment (1) Column 6 for brief explanation of drawings in the specification, Amendment On page G of the contents specification cylinder, line 10, ``Figure 2 is the illustration'' is corrected to ``The diagram is the same.''

Claims (1)

[Scope of Claims] (1) A body, a circular leaf spring whose periphery is fixed in the body and has a center hole, and a periphery of the center hole of the leaf spring is engaged and supported, and the leaf spring is supported by a diameter of the center hole. a cylindrical movable member having a large diameter; a large number of circumferential grooves formed in the movable member; a at least partially transparent lid removably disposed on the upper end of the body; A display end that extends into the interior of the lid, a fork that engages with the lower surface of the plate spring to return the movable element, and a coil spring that provides a return action to the movable element. Abnormality detection device for electrical equipment. (,2) Claim 7 in which the mover, leaf spring, fork, display end, and lid are arranged concentrically with the body and assembled.
Abnormality detection device for electrical equipment as described in . (3) An abnormality detection device for an electrical device according to claim 1, comprising a bottom plate to which a body is connected via a packing. (Re) Abnormality detection device for electrical equipment as set forth in claim 1, in which an appropriate paint is applied to the display edge. (Left) A patent in which the lid is attached to the body by a lid holder that is screwed to the body through a gasket. An abnormality detection device for electrical equipment according to claim 1.