JPH02215021A - Vacuum breaker - Google Patents

Abstract

PURPOSE:To reduce the number of parts and improve the reliability by providing a releasing mechanism and a locking mechanism at a shaft center of a vacuum valve. CONSTITUTION:If a reset electromagnetic coil is excited, a latch 19 pressed by the forward end of an insulation operating rod is rotated counterclockwise against a lock spring 20 about the center of a latch shaft 19a, and engagement with a roller 18 for maintaining the lock condition is released to be changed to the closed pole condition by means of a pole closing spring. In the meanwhile, a repulsive coil 13 is energized by current, a shortcircuit ring 14 gets down along the line of a shaft center B instantaneously by electromagnetic repulsion force against the pole closing spring, when a rod 12 integrated with a receiving plate 12 also gets down to rotate the latch 19 clockwise by pressure of a the lock spring 20 to be engaged with the lower end roller of the down-moved rod 12 for holding the pole opening condition. By thus disposing a releasing mechanism and a locking mechanism on the shalt line B of a vacuum valve 5, the constitution of the titled device is simplified, and the reliability is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vacuum circuit breaker using a vacuum valve, and in particular,
The present invention relates to a vacuum circuit breaker suitable for being mounted on an electric railway vehicle.

[Conventional technology]

As shown in FIG. 9, the conventional vacuum circuit breaker (vacuum opening/closing bag W) changes the direction of the opening force generated by a complicated drive mechanism section 100 via a plurality of links 101, and connects an insulating joint 10.
2, the vacuum valve 103 is opened.

The vacuum valve 103 has a structure in which only the vacuum valve 103 is covered by an integrally molded insulating support frame 104. Further, the drive mechanism section 100 is housed in a metal box 105.

Note that related devices of this type include, for example, Japanese Patent Publication No. 62-26529.

[Problem to be solved by the invention]

The above conventional technology uses a complicated link mechanism to configure the tripping mechanism that opens the vacuum valve and the locking mechanism that maintains the open state, which increases the number of parts, which reduces reliability. There was a problem.

An object of the present invention is to provide a vacuum circuit breaker that can reduce the number of parts and increase reliability.

[Means to solve the problem]

The above object is achieved by providing a tripping mechanism and a locking mechanism on the axis of the vacuum valve.

[Effect]

According to the above configuration, the arrangement is linear.

Since multiple bearings and complicated link mechanisms are no longer required,
Stroke loss in link mechanisms, etc. is reduced, and reliability can be improved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. A pair of insulating support plates 1 spaced apart on the left and right
and 2, and a fixed terminal support 3 is sandwiched on the upper part of the insulating support plate 1.2. One end of the connector 4 is fixed to the fixed terminal support 3, and the other end is connected to the insulating support plate 1,
It is fixed to another support 9a supported by 2 with bolts lla. The connector 4 also has a vacuum valve 5.
A fixed terminal portion (not shown) is firmly supported, and a movable connector 7 is connected to a movable terminal 5a of the vacuum valve 5. This movable connector 7 has sliders 6.6 on both sides.
It is slidably supported by a guide groove 8a of a support body 8 fixed to the insulating support plates 1 and 2. Further, a flexible conductor 9 is connected to the movable connector 7, and this flexible conductor 9 is connected to a support 10 fixed to the insulating support plate 1.2 by a terminal bolt 11.
It is tightened.

Further, a rod 12 is directly connected to the movable terminal 5a of the vacuum valve 5. A repulsion coil 13 and a shorting ring 14 are positioned through the rod 12. The repulsion coil 13 is supported by the insulating support plate 1.degree. 2, and the shorting ring 14 is supported by a plate 15, which is fixed to the rod 12. Furthermore, the rod 12 is connected to the vacuum valve 5.
The closed pole tll16 is inserted. This closing spring 16
Its upper end abuts against the plate 15, and its end abuts against a support 17 fixed to the insulating support plates 1, 2. The lower end of the rod 12 further passes through the support 17, and a roller 18 is pivotally supported on the axis B. A latch 19 is rotatably supported by a shaft 19a at a position facing the roller 18.

This shaft 19a is supported by the support 17.

Further, the latch 19 abuts one end of the lock spring 20 to maintain normal pressure on the roller 18 at all times. The other end of the lock spring 20 is supported by a support 21.

This support 21 is supported by the support 17. The stopper bolt 22 provided on this support body 21 is positioned when the latch 19 is in the unlocked state. 1 and 2 show a state in which the vacuum valve 5 is open. Therefore, the rod 12 is stopped by the elastic stopper 23.

The interlocking auxiliary contacts 24 and 25 are pressed by an operation plate 26 fixed to the latch 19. Next, the mechanism for achieving a closed state will be explained. Reset electromagnetic coil 27 .located substantially opposite the lower end of the rod 12 . Fixed iron core28. York 29. Movable iron core 30, return spring 31. The plunger-shaped electromagnetic drive unit composed of the insulated operating rod 32 is
It is supported by a support 33, and the support 32 is held between the insulating support plates 1.2.

Here, to explain the operation of the vacuum circuit breaker having the above configuration, when the reset electromagnetic coil 27 is excited, the movable core 30 rebels against the return spring 31 and is electromagnetically attracted to the fixed core 28 together with the insulated operating rod 32. Push the latch 19 with the tip of the insulated operating rod 32 (Fig. 2), press the latch 19
The roller 1 rotates counterclockwise around the latch shaft 19a against the lock spring 20 and maintains the locked state.
8 is disengaged, and the state is switched to the closed state by the force of the closing spring 16.

Firstly, in the closed state (see FIG. 6), which explains the mechanism of the high-speed open state, the repulsion coil 13 and the shorting ring 14 are close to each other. In this state, when the repulsion coil 13 is excited with a current of several 100 amperes to several 1000 amperes using the electric charge accumulated in a capacitor (not shown), the shorting ring 14 moves against the closing spring 16. It instantly descends on the line of axis B due to electromagnetic repulsion.

At this time, the receiver also lowers the rod 12 integrated with the plate 15,
The latch 19 is rotated clockwise by the pushing force of the lock spring 20 and engages with the roller 18 at the lower end of the rod 12 that has descended, thereby locking and maintaining the open state (FIG. 5).

According to the above embodiment, there is no complicated mechanism such as a link mechanism, and the tripping mechanism and locking mechanism are arranged on the axis, which simplifies the configuration of the device. Stroke loss due to minute deflection is eliminated, and the gap Gl of several millimeters shown in FIGS. 5 and 6 can be realized accurately and with a simple configuration, improving reliability.

In addition, since it has a so-called double-end support structure in which both ends of each component arranged on the axis are supported by a pair of insulating support plates 1 and 2, it has a mechanically rigid structure and is reliable in terms of the strength of the entire device. It has the effect of increasing sex.

Furthermore, 1. Since the movable terminal 5a of the vacuum valve 5 is opened at an extremely high speed, if the metal bellows (not shown) of the vacuum valve 5 is repeatedly displaced from the axis B, it will be mechanically damaged and destroyed. However, as shown in FIGS. 3 and 4, the thickness direction of the slider 6 and the outer circumferential direction of the slider 6 perpendicular to the thickness direction are slidably guided by the grooves 8a of the support body 8, respectively. As a result, by slidingly restraining the X direction and the Y direction as seen from the axis B, runout with respect to the axis B is suppressed, which has the effect of increasing reliability in terms of life.

In addition, the closing spring 16 in FIG. 1 has a large winding diameter, and by inserting the rod 12 through the center of the spring, the height and shape of the overall structure can be reduced, making it compact. It has the effect of increasing

Next, FIGS. 7 and 8 will be explained. The configurations shown in FIGS. 7 and 8 are the same as the configurations shown in FIGS. 5 and 6, except that the latch 19 is provided with an inclined protrusion.

That is, when the roller 18 provided at the lower end of the rod 12 descends, the inclined surface 19 of the protrusion 19b provided on the latch 19
The roller 18 comes into contact with the latch 19 and forcibly rotates the latch 19 clockwise. As a result, the latch 1, which is a movable object,
9° operation board 26. The interlocking auxiliary contacts 24 and 25 can be rotated without being affected by the inertial mass, and a very effective and reliable locking operation can be achieved when opening at high speed (opening time: 0.5 milliseconds). Further, it is of course necessary to provide a required gap G2 between the protrusion 19b and the outer periphery of the roller 18 and the inclined surface 19c so that the locking action does not mechanically interfere with the latch 19. Furthermore, it is also effective to form the protrusion 19b from an elastic body in order to prevent the interference.

As described above, according to the present invention, there is an effect that locking against high-speed contact opening can be performed more reliably.

In each of the embodiments described above, the closed pole is driven using electromagnetic force, but pneumatic pressure or hydraulic pressure may also be used as the driving source.

〔Effect of the invention〕

As explained above, according to the present invention, the number of parts can be reduced by 1°C.
A highly reliable vacuum circuit breaker can be provided.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a vacuum circuit breaker according to an embodiment of the present invention, and FIG. 2 is a partially cutaway right side view of FIG. 1. Fig. 3 is an enlarged vertical front view showing the vicinity of the slider in Fig. 1, Fig. 4 is an enlarged sectional view along line A-A in Fig. 3, and Fig. 5
6 and 6 are side views illustrating the operation of the main components of FIG. 2, and FIGS. 7 and 8 are side views showing other embodiments of the present invention corresponding to FIGS. 5 and 6, respectively. 9 are side views showing essential parts of a conventional vacuum switchgear. 1.2... Insulating support plate, 5... Vacuum valve, 6...
・Slider, 12... Rod, 13... Repulsion coil, 14... Short circuit ring, 16... Closing spring, 1
8...Roller, 19...Latch, 19b...Latch protrusion, 20...Reaction 1Ii2 Fig. 8...Support body 1.2...Insulating support plate 5...Vacuum Pulp 6... Slider 12... Rod 13... Repulsion coil 14... Short circuit ring 18... Roller 19... Latch Fig. 5 Fig. 6 1.2... Insulation support Plate 5...Vacuum pulp 6...Slider 8...Support 12...Rod 13...Repulsion coil 14...Short circuit ring 19...Lasochi

Claims (1)

[Scope of Claims] 1. A vacuum circuit breaker including a tripping mechanism for opening a vacuum valve and a locking mechanism for holding the vacuum valve in an open state, wherein the tripping mechanism is provided on the axis of the vacuum valve. A vacuum circuit breaker comprising a mechanism and the locking mechanism. 2. In a vacuum circuit breaker comprising a tripping mechanism for opening the vacuum valve via a rod provided on the axis of the vacuum valve, and a locking mechanism for holding the vacuum valve in the open state, the tripping mechanism A vacuum circuit breaker, characterized in that a mechanism is provided at a position where the rod passes through, and the locking mechanism is provided opposite to an end of the rod. 3. The vacuum circuit breaker according to claim 2, wherein the tripping mechanism includes an electromagnetic coil disposed around the rod, and a short circuit ring that receives the magnetic force of the electromagnetic coil to drive the rod. . 4. The vacuum circuit breaker according to claim 3, wherein the electromagnetic coil is a repulsion coil that generates repulsion force. 5. The locking mechanism includes a latch that engages with an engaging portion provided at the lower part of the rod, and a lock spring that maintains the engaged state of the latch, and that 3. The vacuum circuit breaker according to claim 2, further comprising a mechanism for driving the latch in the direction of the spring force of the lock spring. 6. The vacuum circuit breaker according to claim 5, wherein the fulcrum of the latch is provided on an extension of the rod. 7. The vacuum circuit breaker according to claim 1, 2, 3, 4, 5, or 6, wherein each of the parts is arranged between a pair of insulating support members. 8. The vacuum circuit breaker according to claim 7, further comprising a steady rest mechanism for the axis of the movable part of the vacuum valve.