JPS5920647Y2 - vibration detection device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vibration detection device used for detecting internal discharge in gas-insulated electrical equipment.

When an abnormality such as an internal discharge or a flash fault occurs in a gas-insulated electrical device in which current-carrying parts are arranged through multiple containers, the system uses the fact that the containers vibrate, which is characteristic of electrical discharges and flash faults, to It has been proposed to attach a vibration detection device to each container to detect in which container an abnormality has occurred.

FIG. 1 shows a conventional vibration detection device mounted on a gas insulated electrical equipment enclosure.

In such a device, when an electric discharge occurs in the container 4 and the container 4 vibrates, this vibration is transmitted to the movable element 9 via the main body 1 and the elastic body 5, and the movable element 9 vibrates.

In this case, when the mover 9 swings toward the microswitch 8, the deflection of the support portion 5C increases and the frictional resistance between the elastic body 5 and the mover 9 decreases, so that the mover 9 swings toward the microswitch 8. When sliding and swinging away from the microswitch 8, the deflection of the support portion 5C becomes smaller and the elastic body 5 sinks into the mover 9, increasing the frictional resistance. It doesn't move.

As a result, the vibration causes the mover 9 to approach the microswitch 8 while sliding intermittently, and presses the push button 8a to activate the microswitch 8.

By the way, the conventional vibration detection device is configured to position the movable element 9 by bringing the end 9a of the movable element 9 into contact with the bottom surface 1b of the main body 1. Therefore, a large external impact force is applied to the container 4 and the main body. 1, a repulsive force is generated between the end portion 9a and the bottom surface 1b, and this repulsive force may cause the mover 9 to slide, causing the microswitch 8 to malfunction.

This invention was made in view of the above points, and the purpose is to provide a vibration detection device that does not have the above-mentioned drawbacks by configuring the movable element to be supported by the elastic body without contacting the main body. It is something.

2 to 4 show a vibration detection device according to an embodiment of this invention.

In the figure, 1 is a main body with a circular cross section and a hollow part 2.
It is fixed by bolts 3 to a container 4 that constitutes a gas-insulated electrical device.

5 is an elastic body formed in a disk shape as shown in FIG.
A hole 5a with a diameter d1 is provided in the center, and the hole 5a
Support part 5 is formed by a plurality of grooves 5b provided radially from
C is formed.

A spacer 6 maintains the distance between the elastic bodies 5 and is formed in a cylindrical shape.

Reference numeral 7 denotes a lid that is screwed onto a screw 1a provided on the main body 1, and fixes the elastic body 5 to the main body 1 by tightening.

A microswitch 8 is provided on the lid 7, and is provided with a push button 8a and a terminal 8b for outputting a signal to the outside.

Reference numeral 9 denotes a movable element that is fitted into the hole 5a of the elastic body 5 and supported in the hollow part 2 by the support part 5C of the elastic body 5, and has a cylindrical shape with a diameter d2 slightly larger than the diameter d1 of the hole 5a. It is formed by weights.

The outer periphery of the movable element 9 is provided with a positioning annular groove 9b into which the tip of the supporting portion 5C of the elastic body 5 located below is fitted.

Next, the work when assembling the vibration detection device will be explained.

In assembling, first the movable member 9 is inserted into the hole 5a of the elastic body 5, and the tip of the support portion 5C is fitted into the groove 9b.

Then, in this state, the movable element 9 and the elastic body 5 are inserted into the hollow part 2, and the spacer 6 is further inserted into the hollow part, and the movable element 9 is inserted into the hollow part 2.
and push the elastic body 5 below the hollow part 2.

Next, the elastic body 5 located above is fitted onto the movable body 9 and pushed into the hollow part 2.

Next, screw the lid 7 onto the screw 1a and tighten the elastic body 5.
Fix it to main body 1.

In the process of pushing the elastic body 5 into the hollow part 2, the elastic body 5
The support portion 5C is bent upward by the contact pressure with the movable element 9.

When the elastic body 5 is fixed, the tip of the support portion 5C of the elastic body 5 located on the lower side fits into the groove 9b as shown in FIG.

Further, the end portion 9a of the movable element 9 floats above the bottom surface 1b, and the movable element 9 is stopped at a predetermined position set in advance.

In the vibration detection device configured in this way, when the container 4 vibrates due to discharge and the vibration is transmitted to the movable element 9 via the elastic body 5, when the movable element 9 swings upward, the supporting part 5 first
The tip of C is removed from the recess 9b, and thereafter the mover 9 intermittently slides toward the microswitch 8 as in the conventional case.
Activate the micro switch 8.

In the vibration detection device configured in this way, the end 9a of the movable element 9 is raised above the bottom surface 1b of the main body 1, so that strong impact force is applied to the main body 1 due to collisions with objects, etc. However, there is no possibility that the impact force acts directly on the movable element 9 from the bottom surface 1b of the main body 1, causing the movable element 9 to slide and causing the microswitch 8 to malfunction.

The impact force is transmitted to the movable element 9 via the elastic body 5, but since the impact force is alleviated by the elastic body 5, the distance over which the movable element 9 slides becomes extremely small.

Furthermore, if the elastic body 5 is selected to have characteristics that reduce the influence of impact force applied to the movable element 9, malfunctions of the movable force 9 can be reduced.

In addition, when the movable element 9 slides due to vibration caused by discharge and operates the microswitch 8, the bottom surface 1b of the main body 1
The fact that the movable element 9 does not contact the end 9a of the movable element 9 means that the amount of sliding of the movable element 9 can be easily calculated from the characteristics of the vibration caused by the discharge and the characteristics of the elastic body 5, and the operating point of the microswitch 8 can be easily set. can be done.

In the above-mentioned embodiment of this invention, a configuration was described in which the microswitch 8 is actuated by the movable element 9, but this invention is not limited to this. A similar effect can be obtained even if the movable element is configured to protrude to the outside and is configured so that the occurrence of vibration can be detected by visually observing the sliding state of the movable element.

As described above, the vibration detection device of this invention is slidably supported by an elastic body provided on the main body, and the movable element, which slides in a predetermined direction when the main body vibrates, is supported so as not to come into contact with the main body. Therefore, there is no risk of the movable element malfunctioning due to the repulsive force between the main body and the movable element.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view showing a conventional vibration detection device, Figures 2-
FIG. 4 shows a vibration detection device according to an embodiment of this invention, FIG. 2 is a longitudinal sectional view thereof, and FIG.
FIG. 4 is a plan view showing the elastic body. In the figure, 1 is the main body, 2 is the hollow part, 4 is the container, 5 is the elastic body,
6 is a spacer, 7 is a lid, and 9 is a mover. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] An annular elastic body fixed to the inner periphery of the device main body and having a supporting portion formed by providing a groove around a hole in the center; A columnar movable element that slides in only one direction due to applied vibrations, and a detection body that is mounted on the apparatus main body facing the movable element and is activated when the amount of movement of the movable element reaches a predetermined value. A vibration detecting device, characterized in that a groove is provided on the outer periphery of the movable element in which the tip of the supporting part of the elastic body engages, and the movable element is supported by being floated from the bottom of the device main body. .