JPS62114Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an inter-electrode distance adjusting device that maintains the distance between the contacts fixed to the movable electrode rod and the fixed electrode rod of a vacuum shield cutoff valve at a desired distance. It is something.

When testing the pressure resistance and airtightness between contacts, which are the electrodes of conventional vacuum shutoff valves (hereinafter referred to as valves), the distance between the movable and fixed contacts is maintained at the desired distance. This is done in the following way. This method will be explained with reference to the drawings.

Figure 1 is an external view of the vacuum shutoff valve, Figure 2
The figure is a sectional view taken along line A--A in FIG. 1, showing a conventional method for opening a valve. In Figure 2, 2 is a cap, 3 is a bolt, 4 is a movable contact, 5 is a fixed contact, 6 is a movable electrode, 7 is a fixed electrode, 8 is a telescopic bellows, and 9 is a movable side. A movable contact 4 and a fixed contact 5, which slidably support the electrode rod 6 and are fixed to the movable electrode rod 6 and the fixed electrode rod 7, respectively, are provided so as to be brought into contact with each other at central positions. 2a is a hole drilled in the center of the cap 2, and 6a is a screw hole drilled in the upper end of the movable electrode rod 6 along the axis.

When the movable contact 4 and the fixed contact 5 of the valve 1 shown in FIG. In order to open the electrode according to the purpose of the test, a screw hole 6a is formed along the axis at the upper end of the movable electrode rod 6, and a screw hole 6a is formed along the axis of the upper end of the movable electrode rod 6. A cap 2 that covers the upper end portion of the movable electrode rod 6 and has a hole 2a in the center thereof opposite to the screw hole 6a is placed on the upper end surface, and the hole 2a of the cap 2
The bolt 3 is inserted and screwed into the screw hole 6a, the bolt 3 is rotated, and the bolt 3 is temporarily stopped at the point where rotational torque starts to be applied. When the bolt 3 is rotated by applying a tightening torque in such a state, an upward force is generated against the movable electrode rod 6, and the bellows 8
By overcoming the elasticity of , the movable contact 4 and the fixed contact 5 open.
In order to set the inter-electrode distance to a spacing that corresponds to the purpose of the test, the moving distance of the movable electrode rod 6 must be the same as the pitch between the bolt 3 and the screw in the screw hole 6a, that is, the distance between the bolts 3 and the screw hole 6a.
This is determined by the turning angle of the bolt 3, so this is done by managing the turning angle of the bolt 3. However, when the distance between the movable contact 4 and the fixed contact 5 is required to be long, the bolt 3 must be rotated several times to maintain the desired distance between the poles, resulting in poor workability. If the turning angle of the bolt 3 is not managed properly, the test results will lack reliability.

The present invention was made to improve the above-mentioned drawbacks, and in order to easily adjust the opening distance between the movable contact 4 and the fixed contact 5 of the valve 1, a To provide an adjusting device in which several types of adjusting fittings are prepared, and by using these adjusting fittings, the bolt 3 does not need to be rotated any number of rotations, and it is unnecessary to manage the rotation angle of the bolt 3. It is.

An embodiment of the present invention will be described below based on the drawings. Figure 3 is a cross-sectional view taken along the line A-A in Figure 1, showing an embodiment of the present invention in which the electrode is opened using an adjustment fitting in a valve, and Figure 4a is an embodiment of the invention. FIG. 2 is a plan view of an adjustment fitting according to an embodiment, and b is a side view thereof. In FIG. 3, the same reference numerals as in FIG. 2 indicate the same parts.

In FIG. 3, in order to open the distance between the movable side contact 4 and the fixed side contact 5 of the valve 1 according to the purpose of the test, a screw hole 6a is inserted in the upper end portion of the movable side electrode rod 6 along the axis. At the same time, a hole 2a that covers the upper end portion of the movable electrode rod 6 and that faces the screw hole 6a is bored in the upper end surface of the bearing 9 that slidably supports the movable electrode rod 6. The installed cap 2 is placed on the cap 2, and the bolt 3 is inserted into the hole 2a of the cap 2 and screwed into the screw hole 6a, and the bolt 3 is rotated and stopped once at the point where rotational torque starts to be applied. In this state, by pulling up the bolt 3 screwed into the screw hole 6a of the movable electrode rod 6, a gap is created between the head of the bolt 3 and the cap 2. By inserting a U-shaped adjustment fitting 10 made of a band plate having a width W as shown in FIG. 4, which corresponds to the purpose of The distance between the movable contact 4 and the fixed contact 5 can be maintained at a desired distance.

By testing the pressure resistance and airtightness of the valve using several types of adjustment fittings prepared in advance as described above, we were able to test the valve's pressure resistance and airtightness without having to turn the bolt at all, and without having to manage the turning angle of the bolt. It is necessary to improve the accuracy of the distance between poles, work efficiency, etc., and can be adapted to mass production systems, so its practical effects are extremely large.

[Brief explanation of the drawing]

Figure 1 is an external view of the vacuum shutoff valve, Figure 2
The figure is a sectional view taken along the line A-A in Figure 1 showing a conventional method for opening a valve, and Figure 3 is a sectional view showing an embodiment of the present invention in which an electrode is opened using an adjustment fitting in a valve. 1 is a sectional view taken along the line A-A in the poled state, FIG. 1... Valve, 2... Cap, 3... Bolt, 4... Movable side contact, 5... Fixed side contact, 6...
...Movable side electrode rod, 7...Fixed side electrode rod, 8...Bellows, 9...Bearing, 10...Adjustment fitting 2a...
Holes, 6a, 7a...screw holes.

Claims (1)

[Scope of utility model registration request] A screw hole is formed in the upper end of the movable electrode along the axis, and the screw hole is formed in the center of the upper end of the bearing that slidably supports the electrode. A cap with opposing holes is placed on the cap, a bolt is inserted into the hole of the cap and screwed into the screw hole, and a band having a desired width is placed between the head of the bolt and the cap. The distance between the contacts fixed to the movable electrode rod and the fixed electrode rod is maintained at a desired distance by inserting a U-shaped adjustment fitting made of a plate. A device for adjusting the distance between the poles of a vacuum shutoff valve.