JPH028397Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a discharge switch, and particularly to a discharge switch that can automatically adjust the electrode gap in accordance with the voltage applied between the electrodes of the discharge switch.

An example of a conventionally used discharge switch is shown in Fig. 1, and this discharge switch has electrodes 3 and 4 arranged opposite to each other on mounting plates 1 and 2 arranged opposite to each other. , an insulating rod 5 is arranged between both mounting plates 1 and 2, and the mounting plates 1 and 2 are made of an insulating or non-insulating material, and a trigger is provided at the center of one electrode 3. An electrode 6 is provided. It is assumed that the lead terminals of the electrodes 3 and 4 are provided individually. In the discharge switch having the above structure, the flash path characteristics between the electrodes are determined by the gap between the electrodes 3 and 4, and the discharge area is determined by the trigger signal.

By the way, in the above discharge switch, when trying to adjust the flash path characteristics between the electrodes, one of the mounting plates 2 is removed and a spacer is inserted between the mounting plate 2 and the electrode 4 to adjust the gap between the electrodes. The disadvantage is that the adjustment requires a great deal of effort.

On the other hand, there is a structure in which an insulating cylinder is used instead of the insulating rod 5 as described above, air, gas, etc. is sealed in the insulating cylinder 7, and the flash path characteristics between the electrodes are adjusted by adjusting the pressure. Discharge switches are also used, but they require a pressure source such as air or gas, which makes them expensive, makes it difficult to repair the electrodes, and requires pressure adjustment work. It has the following drawbacks.

This idea was made in view of the above, and its purpose is to provide a discharge switch that can automatically adjust the electrode gap depending on the voltage applied between the electrodes.

The discharge switch of this invention in accordance with the above purpose includes a fixed electrode mounting plate fixedly disposed on a base, and a fixed electrode mounting plate disposed opposite to the fixed electrode mounting plate. and a movable electrode mounting plate arranged so that the position can be adjusted in the direction of approaching and moving away from the fixed electrode, and the fixed electrode is mounted on the fixed electrode mounting plate, and the movable electrode is mounted on the movable electrode mounting plate, respectively. A plurality of movable electrode mounting plates are arranged between the base and the movable electrode mounting plate, each having a different stroke so that the gap between the two electrodes can be adjusted in a plurality of stages by selectively operating the movable electrode mounting plate. The present invention is characterized in that an electromagnetic solenoid is provided, a voltage detection means for detecting an applied voltage is provided, and a control means is provided for operating a predetermined electromagnetic solenoid in accordance with the detected voltage from the voltage detection means.

As a result of the above, the voltage applied between the electrodes is detected by the voltage detection means, and based on this detected voltage, the control means selects and operates a predetermined electromagnetic solenoid from among the plurality of electromagnetic solenoids. It becomes possible to automatically adjust the gap, that is, the flash characteristics, in multiple stages.

Next, specific embodiments of the discharge switch of this invention will be described in detail with reference to the drawings.

First, Fig. 2 shows an example of a discharge switch.
In the figure, reference numeral 11 denotes a base, on which a fixed electrode mounting plate 12 is fixed.
Reference numeral 13 denotes a movable electrode mounting plate, which is arranged opposite to the fixed electrode mounting plate 12, and is arranged so that its position can be adjusted in the vertical direction with respect to the fixed electrode mounting plate 12. The above fixed electrode mounting plate 12
The fixed electrode 14 is attached to the movable electrode mounting plate 1.
3, movable electrodes 15 are arranged facing each other. Reference numeral 16 denotes an electromagnetic solenoid as a position adjustment means disposed between the base 11 and the movable electrode mounting plate 13, and is used to move the movable electrode mounting plate 13 in the vertical direction and adjust its position. belongs to.

To explain the above in more detail, four guide rods 17 extend upward from the corners of the base 11, and an insulating rod 18 extends upward from the upper end of each guide rod 17. A fixed electrode mounting plate 12 is installed between the upper ends of the insulating rods 18 . The movable electrode mounting plate 13 has four insulating rods 19 extending downward from its back surface, and a plate 20 is attached to the lower end of the rod 19.
is attached. And the above movable electrode mounting plate 1
Through holes 21 and 22 are formed in the four corners of the movable electrode mounting plate 1 and the plate 20, respectively.
The insulating rod 18 is inserted into the through hole 21 of the plate 20, and the guide rod 17 is inserted into the through hole 22 of the plate 20.
is close to the fixed electrode mounting plate 12 in the vertical direction,
It is designed to allow people to defect. A compression spring 21 is attached around the guide rod 17, and the movable electrode mounting plate 13 is always pushed upward by the spring 21. In the case of the figure, the electromagnetic solenoid 16 as the position adjustment means is as follows.
It is composed of four pairs of electromagnetic solenoids 16a, 16b, 16c, and 16d with mutually different strokes, and each rod of each solenoid 16a...16d extends upward through a through hole provided in the plate 20. The tip portion engages with the upper surface of the plate 20. As a result, the electromagnetic solenoid 16a
...16d is selectively activated, the plate 20, that is, the movable electrode mounting plate 13, is lowered by a distance equal to the stroke of the actuated solenoids 16a...16d, and its position is adjusted so that the fixed electrode 14 and the movable electrode 15 are connected to each other. The gap length between them can be adjusted. In addition, 22 is the fixed electrode 14
The trigger electrode is located in the center of the

The above discharge switch is particularly suitable as a switch for impulse voltage and current generators mainly for low voltage (0 to 30 KV) and low current (0 to 20 KA). An example of a device using the following will be explained. As shown in FIG. 3, an AC power supply 23 is connected to the primary side of a transformer 25 via a voltage regulator 24. A rectifier 26, a charging resistor 27, and a capacitor 28 are connected to the secondary side of the transformer 25, and a load 30 is further connected between both terminals of the capacitor 28 via the discharge switch 29. Further, the output voltage of the voltage regulator 24 is detected by a detector 31 as a voltage detection means, and this detected voltage is input to a control means (not shown). Accordingly, the electromagnetic solenoids 16a...16d can be selectively operated. That is, when the detection voltage is low, the electromagnetic solenoids 16a...16d do not operate, and when the detection voltage reaches the first reference value, the solenoid 16a with the smallest stroke is operated, and the detection voltage further increases. When the second reference value is reached, solenoid 1 with a slightly larger stroke
6b, the solenoid 16a has a necessary stroke depending on the detected voltage.
16d is activated to lower the movable electrode mounting plate 13, the gap between the fixed electrode 14 and the movable electrode 15 is adjusted, and the flash path characteristics are adjusted. In this manner, in the discharge switch described above, it is possible to automatically adjust the electrode gap according to the detected voltage (and thus the voltage applied between the electrodes).

Although one embodiment of the discharge switch of this invention has been described above, the discharge switch of this invention is not limited to the above embodiment, and can be implemented with various modifications. For example, in the above,
Although an example is shown in which four pairs of electromagnetic solenoids 16a to 16d are arranged, the number and arrangement thereof can be variously changed as necessary. In addition, in the above, the movable electrode mounting plate 13 and the electromagnetic solenoid 1
Rod 19 and plate 20 between 6a...16d
However, various other structures can be adopted.

The discharge switch of this invention is constructed as described above, and therefore, according to the discharge switch of this invention, the electrode gap length can be automatically adjusted according to the voltage applied between the electrodes. becomes possible. Therefore, it is not necessary to perform adjustment work such as pressure adjustment and gap length adjustment as in the past, and other mechanisms such as a pressure source are not required, which is advantageous in that it is economical and easy to handle. Therefore, its practical value is great. In particular, the voltage applied between the electrodes is detected by the voltage detection means, and the control means selects and operates a predetermined electromagnetic solenoid from among a plurality of electromagnetic solenoids based on the detected voltage, so that the gap between the electrodes,
In other words, it becomes possible to automatically adjust the flash characteristics in multiple stages.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional discharge switch, Fig. 2 is a front view showing an embodiment of the discharge switch of this invention, and Fig. 3 is a circuit showing an embodiment of a discharge device using the above discharge switch. It is a diagram. 11...Base, 12...Fixed electrode mounting plate, 1
3...Movable electrode mounting plate, 14...Fixed electrode, 15
...Movable electrode, 16...Position adjustment means, 16a,
16b, 16c, 16d...electromagnetic solenoids.

Claims (1)

[Scope of utility model registration request] a fixed electrode mounting plate fixedly disposed with respect to the base; a fixed electrode mounting plate disposed opposite to the fixed electrode mounting plate and close to the fixed electrode mounting plate;
and a movable electrode mounting plate disposed so as to be adjustable in position in directions away from each other, and the fixed electrode is disposed on the fixed electrode mounting plate, and the movable electrode is disposed on the movable electrode mounting plate so as to face each other. A plurality of electromagnetic solenoids each having a different stroke are interposed between the base and the movable electrode mounting plate so that the gap between the two electrodes can be adjusted in multiple stages by selectively operating the base. 1. A discharge switch comprising: a voltage detecting means for detecting an applied voltage; and a control means for operating a predetermined electromagnetic solenoid in accordance with the detected voltage from the voltage detecting means.