JPH03250516A - vacuum circuit breaker - Google Patents

Abstract

PURPOSE:To preform fitting and removal of a vacuum interrupter easily by fixing together a fixing table and a fastening body on the fix side of interrupter, wherein a resilient piece is pinched by the two. CONSTITUTION:A resilient piece 20 pinched between a fixing table 3 and a fastening body 15 at the fix side terminal 9 of a vacuum interrupter 6 deflects when the fastening body 15 is squeezed, and enters into a gap formed between the fixing table 3 and supporting frames 1, 2 which admit fitting of the table 3 for fixation, and thus the two are fastened resiliently, and fixation is accomplished, Thereby the terminal 9 of the vacuum interrupter 6, a conductor 16 to be connected with it, and the fixing table 3 can be sucured to the supporting frames 1, 2 by the use of one fastening body. A stopper 30 to be engaged with a movable side terminal 10 of the interrupter 6 is kept removed when the interrupter 6 is fitted or removed, and thereby the screw coupling of the movable side terminal 0 can be fitted or removed by turning the interrupter 6 itself.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vacuum circuit breaker, and more particularly to a vacuum circuit breaker with an improved fixing structure for a vacuum interrupter.

[Conventional technology]

An example of a conventional vacuum circuit breaker will be explained with reference to FIGS. 9 and 10. A fixed stand 3. The movable conductor 16 and the operating part 5 are connected to the bolts 14, 32.3.
It is fixedly supported by 3. The vacuum interrupter 6 has a fixed contact 7 and a movable contact 8 opposing the fixed contact 7. Each contact is provided with terminals 9 and 10.

The movable contact 8 is supported by a bellows 11 and a guide 12 so as to be movable in an axial direction opposite to the fixed contact 7, and the solid contact is enclosed in a closed container 13 and the inside thereof is kept in a vacuum.

The vacuum interrupter 6 is fixed by fastening the terminal 9 and the conductor 4 on the fixed side to the fixing base 3 using a fastener (in this example, a hexagonal bolt) 1.
On the other hand, the terminal 1o on the movable side is fitted and fixed in the hole of the conductor 16, and the guide 12 is provided with a groove 29 as shown in FIG.
It is designed to stop the rotation.

A flexible conductor 17 and a connecting body 18 with the operating portion 5 are screwed into the movable terminal 10 and fixed with a lock nut 19.

The operating section 5 has a function of pressing or separating the movable contact 8 from the fixed contact 7 via the connecting body 18 and maintaining a predetermined gap G.

In the conventional vacuum circuit breaker configured in this way,
The procedure for replacing the vacuum interrupter 6 will be explained.

First, the external connection wiring (not shown) is removed from the fixed conductor 4.

Next, the fastener 15 is loosened and removed, and the conductor 4 is removed.

Furthermore, fixing bolts 14 between the fixing base 3 and the insulating support frames 1 and 2
, and pull out the fixing base 3 in a direction perpendicular to the plane of the drawing.

Next, the lock nuts 19 of the movable side terminals are loosened, the fixing bolts 32 of the movable side conductor 16 and the insulating support frames 1 and 2 are loosened, and the guide 12 of the vacuum interlude 6 is pulled out from the groove 29 of the conductor 16. When the vacuum interrupter 6 is rotated in the above state to release the screw connection between the movable terminal 8 and the connecting body 18, the vacuum interrupter 6 can be removed upward.

Next, install a new vacuum interrupter 6 in the reverse order of the above. At this time, the gap G between the contacts 7 and 8 at the time of opening is adjusted using the screw joint between the movable terminal 10 and the connecting body 18 so that the gap G between the contacts 7 and 8 becomes a predetermined value. After that, remove the vacuum interrupter 6 according to the above procedure until it can be rotated, and then adjust the interrupter 6 by turning it by the required fixed number of times. (Utility Model Application Publication No. 64-2334) [Problems to be Solved by the Invention] The above-mentioned conventional technology does not take into account the ease of attaching and detaching the vacuum interrupter when replacing it, and the problem is that the vacuum interrupter is removed from the main body. The problem with this was that a large number of screws and parts had to be removed.

One of the objects of the present invention is to provide a vacuum circuit breaker in which a vacuum interrupter can be easily attached and detached.

Another object of the present invention is to provide a vacuum circuit breaker whose contact gap and operating stroke can be easily adjusted.

(Means for solving problems) The present invention is one of the means for achieving the above object.

An elastic material is sandwiched between the fastening body on the fixed side of the vacuum interrupter and the fixing base to fix the two.

Further, a hole passing through the movable contact side of the vacuum interrupter is provided in the movable conductor, and a stopper that engages with the movable terminal of the vacuum interrupter is removably attached to the movable conductor.

Further, as one of the means for achieving the above-mentioned other object, the present invention provides a screw connection between the terminal side and the operation section side of the connecting body between the movable side terminal of the vacuum interrupter and the operation section, and these screws. This meant that the pinch was different.

[Effect]

The elastic body inserted between the fastening body of the fixed side terminal of the vacuum interrupter and the fixing base is bent by tightening the fastening body, and the gap created between the fixing base and the support frame that fits and fixes the elastic body. and elastically tighten and fix the two. This allows the fixed side terminal of the vacuum interrupter and the conductor connected to it.

The support frame and the fixing base can be fixed by tightening one fastener.

Furthermore, by removing the stopper that engages with the movable terminal of the vacuum interrupter when attaching or detaching the vacuum interrupter, the screw connection of the movable terminal can be attached or detached by rotating the vacuum interrupter itself.

Furthermore, the spacing between the movable terminal and the operating section changes by the difference in pinch due to the screws provided on both sides of the connecting body with different pitches, and the size can be adjusted as desired.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 8.

A fixed base 3, a movable side conductor 16, an operating section 5, etc. are fixedly supported between a pair of left and right insulating support frames 1 and 2. The vacuum interrupter 6 has a fixed contact 7 and a movable contact 8 opposing the fixed contact 7, and each contact is provided with terminals 9 and 10.

The movable contact 8 is supported by a bellows 11 and a guide 12 so as to be movable in an axial direction opposite to the fixed contact 7.
, 8 are enclosed in a closed container 13, and the inside is kept in vacuum.

A fastener 15 is attached to the fixed side terminal 9 of the vacuum interrupter 6.
is screwed in, and this fastening body 15 has a chevron-shaped elastic body 20. The fixed base 3. It passes through the fixed conductor 4. The outer end of the chevron-shaped elastic body 2o enters the gap provided between the insulating support frames 1, 2 and the fixing base 3, and tightens both by its elastic deflection.

The movable terminal 1o side of the vacuum interrupter 6 is fitted into a hole 16H provided in the conductor 16, and a detent stopper 30 as shown in FIG. 5 is removably attached to the conductor 16 with a screw 31.

The tip of this stopper 30 engages with the vacuum interrupter 6a and a notch 12 provided on the outer periphery of the guide 12.

Further, one end of a connecting body 18 passing through the flexible conductor 17 is screwed into the end of the movable terminal 1o. The other end of the connecting body 18 is also screwed into the operating section 5 to connect the operating section 5 and the movable terminal 10. The pitches of both of the connecting bodies 18 are different from each other.

The operating section 5 is used to press or separate the movable contact 8 from the fixed contact 7 via the connecting body 18.

Figure 2 shows the fastening body of the fixed side terminal 9 (in this example, a hexagonal bolt)
15 is shown in a relaxed state, and the chevron-shaped elastic body 20 recovers to its initial shape due to its own elasticity. One end of the fixed conductor 4 and the movable conductor 16 are connected to the fixed terminal 9 of the vacuum interrupter 6 and the flexible conductor 17, and the other end is bent into an L shape to connect external wiring 21A, 21B to the bolt 24 and nut 23. It has been concluded by.

A terminal block 22 is attached to the opposite side of the wiring connection surface of each conductor 4, 16, and a groove 26 provided in the insulating support frame 1, 2 is installed.
The protrusion 28 is fitted into and fixedly supported.

A square hole (or groove) 27 is provided on the contact surface side of the terminal block 22 with the conductors 4 and 16 to prevent the fastener (in this example, a hexagonal bolt) from rotating. Insert and secure the square bolt head or square nut into the groove (or groove) 27.

The procedure for replacing the vacuum interrupter 6 in the vacuum circuit breaker configured as described above will be explained.

First, the external connection wiring 21 is removed from the fixed conductor 4. Next, the fastener 15 screwed into the fixed terminal 9 is loosened and removed. At this time, the angle-shaped elastic body 20 returns to its shape as shown in FIG. 2, so that the fixed base 3° conductor 4 can be pulled out to the right in FIG.

Furthermore, when the stopper 30 is removed by loosening the screw 31, the vacuum interrupter 6 becomes rotatable around the screw center line of the movable terminal 10, so loosen the lock nut 19, turn the interrupter 6, and remove it from the connecting body 18. . After completing the above work, the vacuum interrupter 6 is removed, and since only five screws are required for removal, including the lock nut 19, removal is easy.

Next, install a new vacuum interrupter 6 in the reverse order of removal.

The procedure for adjusting the gap G between the contacts 7 and 8 when they are opened after reinstallation will be explained with reference to FIG. 8.

Lock nuts 19.1 on the movable terminal 10 side and the operating section S side
With 9A loosened, the lock 25 of the operating section 5 is released and the contact 8 is turned on. Contactor 7 of vacuum interrupter 6
, 8 cannot be directly measured, so it is measured by the stroke of the operating section 5. When the connecting body 18 is rotated in the above state, the distance between the screws on the movable side terminal 10 side of the connecting body 18 and the screw on the operating unit 5 side changes by the pitch difference between them, and the value of the gap G of the stopper 58 is adjusted to wR. can do. When the gap G reaches the predetermined size, the lock nut 19.
Tighten 19A, and the replacement work of the vacuum interrupter 6 is completed.

The above gap G can be adjusted by contact 7 while using the vacuum circuit breaker.
, 8 are worn out and the gap G becomes large, readjustment can be carried out in the same manner.

Note that in the above embodiment, the insulating support frames 1 and 2 that support the components are
Although the left and right parts were made into separate pieces, the effect remains the same even if both are molded into one piece.

Moreover, the effects of the present invention do not change even if the shape of the insulating support frames 1 and 2 is not plate-like but insulator-like or column-like.

Further, according to the above embodiment, the external arrangement g21A.

By providing the terminal block 22 with a locking groove or hole for a square bolt or square nut as a connection terminal with 21B,
One tightening tool is required for attaching and detaching wires to and from terminals, which improves work efficiency.

In addition, the terminal block 22 is supported in a fitting manner with the insulating support frames 1 and 2, and is fixed by the terminal conductors 4 and 16 to prevent removal, so that the terminal block 22 can be mounted without using fastening parts. Retention is achieved, reducing the number of parts and reducing assembly man-hours.
It has the effect of reducing screw machining costs.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the effects described below.

1. The elastic body provided between the fastening body of the fixed side terminal and the fixing base allows the terminal of the vacuum interrupter, the conductor connected to it, the fixing base, and the support frame to be fixed at the same time with one fastening body, making assembly easy. It is easy and requires fewer fastening parts.

2. The stopper to prevent co-rotation of the vacuum interrupter is
It can be attached and detached independently at any time, so when replacing the vacuum interrupter, simply remove the stopper.

The mounting screws of the movable side terminals can be removed by rotating the vacuum interrupter, and this can be easily done without the need to remove other supports or parts.

3. By configuring the screws on both sides of the connecting body that connects the movable side terminal and the operating section with different pitches, the distance between the movable side terminal and the operating section can be adjusted in the assembled state by turning the connecting body, and temporary assembly is possible. Readjustment becomes unnecessary.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the vacuum interrupter according to the present invention, FIG. 2 is a longitudinal sectional front view showing the fastener in the upper part of FIG. 1 in a relaxed state, and FIG. 3 is the vicinity of the vacuum interrupter in FIG. FIG. 4 is a rear view of FIG. 3, FIG. 5 is a cross-sectional view taken along the line ■-■ in FIG. 3, FIG. 6 is a plan view showing the terminal block, and FIG. The figure is a front view of FIG. 6, FIG. 8 is a longitudinal sectional front view showing the situation during gap adjustment of the vacuum circuit breaker according to the present invention, FIG. 9 is a longitudinal sectional front view showing the conventional vacuum breaker, and FIG. It is a diagram corresponding to FIG. 5 in the conventional art. 1.2...Insulating support frame, 3...Fixing stand, 4,16.
...Conductor, 5...Operation unit, 6...Vacuum interrupter, 7.1. Fixed contact, 8... Movable contact, 18...
・Connection body, 19° 19A...Lock nut, 20...
・Angle-shaped elastic body, 3° Diagram Diagram Diagram 8 Diagram Diagram

Claims (1)

[Scope of Claims] 1. The fixed contact side of a vacuum interrupter, in which a fixed contact and a movable contact are covered with a sealed container and maintained in a vacuum, is fixed to a fixed base via a fastening body, and this fixed base is connected to a pair of In the vacuum circuit breaker, the movable contact side of the vacuum interrupter and an operating section for driving the movable contact are respectively fixed to the pair of insulating supports, and the fixed base is fixed to the insulating supports. means for engaging and supporting the pair of insulating supports, and generating a crimping force at the engaging portion between the fixed base and the insulating supports by fastening the fastening body, and a movable contact of the vacuum interrupter. 1. A vacuum circuit breaker, characterized in that a child side thereof passes through a support supported by the insulating support. 2. between the vacuum interrupter and the insulating support;
3. The vacuum circuit breaker according to claim 2, further comprising a rotation stopping mechanism for said vacuum interrupter. 3. The rotation stopping mechanism includes a notch provided on the outer periphery of the vacuum interrupter and a stopper that engages with the notch, and the stopper is removably attached to a support that passes through the vacuum interrupter. The vacuum circuit breaker according to claim 2, characterized in that: 4. The vacuum circuit breaker according to claim 3, wherein the notch is provided at a lower part of the closed container. 5. The movable contact of the vacuum interrupter and the operating section are connected via a connecting body, and this connecting body has threaded portions with different pitches on both sides, and this threaded portion is connected to the movable contact and the operating portion. The vacuum circuit breaker according to claim 1, wherein the vacuum circuit breaker is screwed into the operating section. 6. The vacuum circuit breaker according to claim 1, wherein the support passing through the movable contact side of the vacuum interrupter is a conductor electrically connected to the movable contact. 7. A vacuum interrupter in which a fixed contact and a movable contact are covered with a sealed container to maintain a vacuum, a fixed base for fixing the vacuum interrupter, an operation unit for driving the movable contact, and fixing of the vacuum interrupter. In a vacuum circuit breaker comprising a stand and an insulating support that supports the operating section, support reinforcing means enhances the support function of the fixing stand to the insulating support when the vacuum interrupter is fixed to the fixing stand. A vacuum circuit breaker characterized by being provided with. 8. The support reinforcing means comprises a fastening body that fixes the vacuum interrupter to the fixing base, and a crimping tool that caulks the support portion of the fixing base to the insulating support body by fastening the fastening body. 7. The vacuum breaker according to 7. 9. A vacuum interrupter in which a fixed contact and a movable contact are covered with a sealed container to maintain a vacuum; a fixing base for fixing the fixed contact terminal on the upper part of the vacuum interrupter together with the first conductor by a fastening body; a second conductor that supports a position that guides the penetration of a movable contact terminal at a lower part of the vacuum interrupter; a flexible conductor that electrically contacts the movable contact terminal and the second conductor; and the movable contact. In the vacuum circuit breaker, the vacuum circuit breaker is equipped with an operating section that drives the holder, and a pair of insulating support plates that support the fixing base, the second conductor, and the operating section. A hook along the moving direction of the front movable contact is provided, an engagement groove for engaging the hook is provided on the other side, and a crimping means is provided for crimping the hook into the engagement groove, and A vacuum circuit breaker, characterized in that a lower part of the vacuum interrupter penetrates through the second conductor. 10. The hook is provided on the fixing base, the engagement groove is provided on the insulating support plate, and the crimping means is a chevron-shaped elastic body whose center portion is fixed by the fastening body. The vacuum circuit breaker according to claim 9.