JPH0313692B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a vacuum shield and disconnector that prevents mechanical deformation due to opening and closing operations.

(Prior art) In high-voltage breakers, especially vacuum breakers, the breakers are composed of a contact part that conducts the main circuit current and an operating device, and the driving force of the operating device operates the contacts of the contact part. Pressure is applied to maintain predetermined properties. Therefore, the connecting portion between the contact portion and the welding device must have a necessary and sufficient connecting force to prevent deformation due to the pressing force of the contact portion.

The structure of a conventional vacuum shield breaker will be explained with reference to FIGS. 1 and 2.

In FIG. 1, 101 is a base serving as a base for a bridge or disconnector, and a frame 102 is an insulating frame 10.
3 is fixed. An operating device 104 is attached to the frame 102, an upper conductor 105 and a lower conductor 106 are fixed to the insulating frame 103, and a vacuum valve 10, which serves as a shield and a cutout, is fixed to the upper conductor 105.
7 is installed. The movable shaft 107a of the vacuum valve 107 is connected to the lower conductor 106 via a flexible conductor 108, and current is passed through the upper conductor 105, the vacuum valve 107, the flexible conductor 108, and the lower conductor 106. Further, an insulated operating rod 109 is connected to the vacuum valve movable shaft 107a, and is connected to the operating device 104 via a connecting lever 110. Note that the connecting lever 110 is rotatably supported by the frame 102 by a pin 111. Further, the frame 102 and the insulating frame 103 are connected via a reinforcing plate 112. When an opening/closing operation signal is applied to the operating device 104, the driving force of the operating device 104 is transmitted to the insulated operating rod 109 and the vacuum valve movable shaft 107a via the lever 110.
It has a structure that opens and closes the contact part housed inside.

In FIG. 2, a frame 202 is fixed to a base serving as a base for a cutter 201 and an operating device 204, a support insulator 20, etc.
3a and 203b are attached, an upper conductor 205 is fixed to the supporting insulator 203a via a support 213a, and a lower conductor 206 is fixed to the supporting insulator 203b via a support 213b. A vacuum valve 207 is attached to the upper conductor 205, and the movable shaft 207a of the vacuum valve 207 is connected to the lower conductor 206 via a flexible conductor 208, and current flows through the upper conductor 205, the vacuum valve 207, the flexible conductor 208, and the lower conductor 206. Power is applied. Further, an insulated connecting rod 209 is connected to the vacuum valve movable shaft 207a and connected to the operating device 204 via a connecting lever 210. Note that the connecting lever 210 is rotatably supported by the frame 202 by a pin 211. Also, the upper conductor 20
5. The lower conductor 206 is connected to the insulating support rods 212a and 21
It is connected and fixed to the base 201 via 2b.
The operation of the above-mentioned shingle breaker is similar to that shown in FIG.

(Problem to be Solved by the Invention) In such a conventional vacuum shield disconnector shown in FIG. 1, when the vacuum valve 107 is closed, rigid force is generated around the insulated operating rod 109, The frame 102 and the insulating frame 103 are indicated by arrow A
There is a drawback that deformation in the direction causes insufficient pressing force at the contact portion, and in order to solve this problem, reinforcing methods have become complicated and expensive.

In addition, in the case of FIG. 2, when the circuit closing operation is performed as in the case of FIG. It was necessary to be strong and have sufficient insulation strength, and it was expensive.

An object of the present invention is to provide a vacuum shield and disconnector that prevents mechanical deformation due to opening and closing operations.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention includes a vacuum valve in an insulating frame independent of each phase, and connects the insulating frame to three parts via a connecting part. In a vacuum shield and disconnector having an integrated insulating frame and an operating device housed in the frame that applies a pressing force to the contact part of the vacuum valve when closing the circuit, the insulator is provided by protruding from the upper part of the back of the connecting part. A frame fixing part that fixes the frame to the frame, a vacuum valve fixing part that fixes the fixed shaft side of the vacuum valve above the insulating frame and applies a force based on the pressing force of the contact part, and a vacuum valve fixing part that is attached to the frame and is attached to the vacuum valve fixing part. A connecting part is integrally formed at the bottom of the back of the insulating frame so that both the acting force and the force in the opposite direction are received by the insulating frame, and the connecting part is connected to the movable shaft of the vacuum valve through the connecting part to control the driving force of the operating device up and down. It consists of a connecting lever that transmits the direction to the movable shaft of the vacuum valve.

(Function) In the structure configured as described above, the insulating frame is fixed to the frame by the frame fixing part, and the entire insulating frame receives contradictory forces based on the contact pressure forces generated at the vacuum valve fixing part and the connecting part. Mechanical deformation can be prevented.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 3 shows the overall structure of the vacuum shield breaker of the present invention, and FIG. 4 shows its details.

In FIGS. 3 and 4, 301 is a base to which a frame 302 is fixed. frame 302
includes an operating device 304 and an insulating frame 3 integrated with three phases.
03 is attached to the back. Insulation frame 3
03 is attached with an upper conductor 305 and a lower conductor 306, and a vacuum valve 307 is fixed to the insulating frame 303 via the upper conductor 305. The movable shaft 307a of the vacuum valve 307 is connected to the lower conductor 306 via a flexible conductor 308, and current is passed through the upper conductor 305, the vacuum valve 307, the flexible conductor 308, and the lower conductor 306. Further, an insulated operating rod 309 is connected to the vacuum valve movable shaft 307a and connected to the operating device 304 via a connecting lever 310.

The connecting lever 310 is connected to the connecting portion 303ha at the lower back of the insulating frame 303 by means of a pin 311.
Mounting hole 303fa provided in 303hb, 303hc,
An insulated operating rod 309 that is rotatably supported by 303fb and 303fc and reverses the driving force of the operating device 304;
It is transmitted to the vacuum valve movable shaft 307a.

Further, FIGS. 5, 6, and 7 are diagrams showing details of the insulating frame 303.

The insulating frame 303 is an insulating frame 303a, 303
b, 303c, and connecting portions 303j, 3
03k, the three phases are integrally connected and molded. In addition, frame fixing parts 303d and 303e are provided in the interphase connection parts 303j and 303k, respectively, and these frame fixing parts and mounting holes 303ia, 303ib, and 303ic provided in the connection part at the lower back of the insulating frame are connected to each other.
The insulating frame 303 is attached and fixed to the frame 302 by. Furthermore, insulating frames 303a, 303
The vacuum valves inserted through the openings b and 303c are fixed by vacuum valve fixing parts 303ga, 303gb, and 303gc provided above the respective insulating frames.

Next, the operation of the present invention will be explained.

Now, when the opening/closing operation signal is applied to the operating device 304, the driving force of the operating device 304 is applied to the connecting lever 310.
It is reversed and transferred to the insulated operating rod 309 and the vacuum valve movable shaft 307a to open and close the contact portion housed in the vacuum valve 307, thereby opening and closing the main circuit current.

At this time, the wipe spring 312 provided in the operating device 304 causes the connecting lever 310 and the insulated operating rod 3 to
A contact pressing force is applied to the contact point of the vacuum valve 307 via the contact point 09. This contact pressure force is applied to the vacuum valve fixing parts 303ga, 303gb of the vacuum valve 307,
303gc and connecting parts 303ha, 303hb, 303
A repulsive force (contradictory force) is generated between the mounting holes 303fa, 303fb, and 303fc of the hc, and the insulating frame 303a,
This becomes a force that deforms 303b and 303c. However, the insulating frames 303a, 303b, and 303c are molded independently for each phase and support the repulsive force on the surfaces surrounding the vacuum valve 307 on three sides, so that deformation is reduced. Additionally, since each phase is supported independently, the force is one-third of the force required when all three phases support the repulsive force together, further reducing deformation. Furthermore, the mounting hole 303
Since the insulating frame 303 is fixed to the frame 302 with ia, 303ib, and 303ic, the mounting hole 303
Deformations near fa, 303fb, and 303fc are also reduced.

[Effects of the Invention] As described above, the present invention fixes the insulating frame to the frame using the frame fixing portion and the connecting portion, and
Since the vacuum valve fixing part and connecting part are provided on the insulating frame, the insulating frame receives the pressing force of the contact part from the operating device transmitted by the connecting lever, which improves rigidity in all directions and prevents mechanical deformation. be able to. Furthermore, since a double insulator is interposed between the phases, the dielectric strength is improved.

[Brief explanation of the drawing]

1 and 2 are side views showing a conventional vacuum shield disconnector, and FIG. 3 is a diagram of a vacuum shield disconnector according to an embodiment of the present invention, in which a is a side view, b is a back view, and FIG. Figure 4 is a detailed side view of the vacuum shield disconnector according to the present invention;
In the figures, a is a plan view, b is a side view, c is a front view, and FIGS. 6 and 7 are perspective views of the insulating frame of FIG. 303...Insulating frame, 303d, 303e
...Frame fixing part, 303fa, 303fb, 30
3fc...Mounting hole, 303ga, 303gb, 303
gc...Vacuum valve fixing part, 307...Vacuum valve, 310...Connection lever, 303ha, 303
hb, 303hc...Connection part, 303ia, 303ib,
303ic...Mounting hole.

Claims (1)

[Claims] 1. A vacuum valve is provided in an insulating frame independent of each phase, and an insulating frame in which the insulating frame is integrated into three phases via a connection part, and a pressing force of the contact part of the vacuum valve when the circuit is closed. A vacuum shield disconnector having an operating device housed in a frame, comprising: a frame fixing part protruding from the upper rear surface of the connection part and fixing the insulating frame to the frame; and an upper part of the insulating frame. a vacuum valve fixing part that fixes the fixed shaft side of the vacuum valve and applies a force based on the pressing force of the contact part, and a force that is attached to the frame and acts in a direction opposite to the force that acts on the vacuum valve fixing part. a connecting portion integrally molded on the lower back side of the insulating frame so as to receive both ends of the vacuum valve in the insulating frame; A vacuum shield disconnector having a connecting lever that transmits transmission to a valve movable shaft.