JPS6229847B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operating device for a shroud breaker, and more particularly, to an operating device for a shredder breaker, and more particularly, to
The present invention relates to a device that performs a tripping operation.

Conventionally, the sheath breakers have been operated by various means to insert and trip the sheath breakers, one of which is
There is an electric spring method in which a spring for closing operation is stored with an electric motor, and this spring is released in response to a closing command to perform the closing operation. A latch mechanism must be provided separately, which complicates the structure and increases costs.
There are also pneumatic operating devices such as air cylinders that operate both the closing and tripping operations using compressed air, but these devices require a mechanical latch mechanism to maintain the closed state. At the same time, there were problems such as unstable tripping operation characteristics.

The present invention has been made in view of the above-mentioned problems, and its purpose is to stabilize the tripping operation characteristics by performing the tripping operation using a tripping spring that is charged during the closing operation. , the closing operation is performed by a pneumatic operating device operated by compressed air, the compressed air supplied during the closing operation is used to maintain the closing state, and a mechanical latch mechanism is omitted, simplifying and reducing costs. An object of the present invention is to provide an operating device that is designed to be down. Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a partially cutaway front view of a shingle breaker 1 equipped with a device according to the present invention.
is a frame 3 supported by a plurality of legs 2
It also includes a plurality of shingles 4 erected on the frame 3 and an operating device 5 provided on the frame 3 for inserting and pulling out the shingles 4.

A plurality of support insulator tubes 6 are erected on the frame 3 via cylindrical mounting brackets 7, which are appropriately spaced apart from each other. An operating rod 8 whose lower end protrudes into the frame 3 is inserted into the axial center of each support tube 6 so as to be able to move up and down, and the upper end of the operation rod 8 is provided on the support tube 6. It is also connected to the movable rod 14 of the section 4. That is, in this embodiment, each sheath section 4 is shown by taking a vacuum sheath disconnector as an example, and is constituted by a vacuum valve 9, a sheath insulator tube 10, and the like. Inside the vacuum valve 9, there are provided a fixed rod 12 having a fixed contact 11 fixed to its lower end, and a movable rod 14 having a movable contact 13 fixed to the fixed contact 11, which can freely move toward and away from the fixed contact 11. Note that 15 is a shield attached to the inner peripheral surface of the vacuum valve 9, and 16 is a bellows for maintaining airtightness within the vacuum valve 9.

Inside the horizontally extending hollow frame 3, there is installed an operating device 5 for synchronously performing the closing and tripping operations of the respective sheath sections 4. The operating device 5 includes a tripping spring 17 that performs a tripping operation using energy stored during a closing operation, a pneumatic operating device 18 such as an air cylinder for performing a closing operation, and a pneumatic operating device 18 that supplies compressed air. an air tank 19 to which air is supplied from an air supply source such as an air compressor (not shown) so as to maintain a constant pressure;
a switching valve 38 provided in a pipe connecting the air tank 19 and the pneumatic operating device 18; one of the three operating rods 8; a tripping spring 17;
It is constructed by a link mechanism etc. that connects the three parts of the pneumatic operating device 18. That is, at positions corresponding to each of the operating rods 8 in the frame 3, the central portions of a suitable number of dogleg-shaped bell cranks 21 constituting a part of the link mechanism are rotated via horizontal support shafts 22, respectively. One end of each bell crank 21 is pivotally connected to the operating rod 8 at its lower end. The other end of each bell crank 21 is pivotally connected to a connecting rod 23 that is swingable within the frame 3 and extends horizontally. One end of the connecting rod 23 (the left end in FIG. 1) is
It protrudes into the ammunition chamber 24 arranged in parallel to the frame 3, and has a disc-shaped ammunition locking member 25 at its tip.
is installed. The above-described tripping spring 17 is elastically mounted between the bullet locking member 25 and the side wall of the frame 3.

One end of the bell crank 21 is connected to the operating rod 8.
At its tip, there is an output link 2 whose lower end is pivotably connected to the frame 3 and whose central portion is bendable.
The upper end of 6 is pivotally connected. One end of a connecting link 27 is pivotally connected near the center of the output link 26, and the other end of this connecting link 27 is pivotally connected to the tip of a piston rod 28 of the pneumatic operating device 18. The pneumatic operating device 18 extends in the same direction as the aforementioned connecting rod 23, and the inside of its casing is connected to the piston rod 28 by a piston 29 to which the piston rod 28 is integrally attached.
It is divided into a first chamber 30a on the side and a second chamber 30b filled with compressed air from the air tank 19. The first chamber 30a is always in communication with the outside air, and a pipe line 31 is connected to the second chamber 30b. They are connected via a switch valve 38 which can be switched freely and is cut off by demagnetizing the electromagnet during a tripping operation. The inside of the casing of the switching valve 38 is divided into a first chamber 41, a second chamber 40, and a third chamber 42 from the left in the figure by a pair of spools 39 that are slidably fitted. Since a piston chamber 43 is provided which is partitioned by a piston 44 having a diameter larger than that of the spool 39, the third chamber 42 is composed of a small diameter portion and a large diameter portion. This piston 44 and the pair of spools 3
9 are integrally connected to each other via a rod 45 that passes through their respective shaft centers, and the rod 45
Both ends of the casing are slidably inserted through the casing. A stopper part 46 is integrally formed on the first chamber 41 side of the spool 39 to restrict leftward movement of the spool 39 during a tripping operation, and a stopper part 46 is integrally formed on the bottom side of the piston chamber 43. is equipped with a cylindrical stopper member 47 that restricts movement of the piston 44 and the like to the right during the closing operation.

The first chamber 41 of the switching valve 38 communicates with the pipe line 31 via a pipe line 48. Further, near the junction between the third chamber 42 and the piston chamber 43, a port 42a is provided which is constantly in communication with the outside air.
The air tank 19 is connected to the second chamber 40 of the switching valve 38 via a conduit 37 so as to constantly supply compressed air, and the piston chamber 43 is connected to an electromagnetic switching valve 50 with 3 ports and 2 positions. Squeezed pipe 49
It is connected to the conduit 37 by. This electromagnetic switching valve 50 is energized by a tripping command and switched to supply compressed air to the piston chamber 43, and is demagnetized as soon as the tripping operation is completed, cutting off the branched pipe line 49 and supplying compressed air to the piston chamber 43. 4
3 to communicate with the outside air.

With the above configuration, in order to perform the closing operation, the electromagnet of the switching valve 38, which is in the on/off state as shown in FIG. 2, is energized, the spool 39 is moved to the right, and the air The tank 19 is communicated with the second chamber 30b of the pneumatic operating device 18 via the conduit 37, the second chamber 40 of the gate valve 38, and the conduit 31, and compressed air is transferred from the air tank 19 to the second chamber 30b of the pneumatic operating device 18. It is supplied into the chamber 30b. Then,
The piston 29 and the piston rod 28 move to the left as shown in FIG. 1, and the output link 26 is pushed near its center via the connecting link 27.
The upper edge of moves upward. Therefore, connecting rod 2
The bell cranks 21 connected through the bell cranks 3 rotate in the counterclockwise direction in FIG. Even if the magnet is de-energized, it is maintained in the closed state (described later). At this time, the rotation of each bell crank 21 causes the connecting rod 23 to move rightward in FIG. and stored power. At this time, compressed air is simultaneously supplied into the first chamber 41 of the switching valve 38 via a pipe line 48 branched from the pipe line 31, and the spool 39 receives a force that presses it to the right in FIG. Therefore, even if the closing command is terminated, the closing state (the state in which the pipe line 37 and the pipe line 31 are in communication) is maintained. In addition, the electromagnetic switching valve 50
is demagnetized at the time of the closing operation, the pipe line 49 is cut off, and the piston chamber 43 is communicated with the outside air.

Next, in order to perform a tripping operation, the electromagnetic switching valve 50 is energized and compressed air is supplied from the conduit 49 to the piston chamber 43. Since the piston 44 has a larger diameter than the spool 39 and has a larger pressure receiving area, the spool 39 is moved to the left in FIG. 1 and stopped at the position shown in FIG. 31, and the air in the second chamber 30b of the pneumatic operating device 18 is
and is discharged into the outside air through the third chamber 42 of the switching valve 38. Therefore, each sheath section 4 is tripped as described above by releasing the tripping spring 17, which is loaded at the time of the closing operation. Note that the air in the second chamber 41 of the switching valve 38 flows through the pipe line 48 and the pipe line 3.
1 and the third chamber 42 of the switching valve 38 to be released into the atmosphere.

As explained above, according to the present invention, the switching valve 3
Since the first chamber 41 of No. 8 communicates with the conduit 31,
Even if the switching valve 38 is de-energized, the pneumatic operating device 1
The second chamber 30b of No. 8 remains in communication with the air tank 19, and the closed state is maintained. That is, no expensive mechanical latching mechanism is required.
In addition, the breaker is operated by the releasing force of the tripping spring stored during the closing operation, and the tripping operation characteristics are stabilized.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway structural diagram showing the operation device of the breaker according to the present invention in the closed state, and FIG. 2 shows the operating device in the disconnected state. It is a structural diagram of the main part. 3... Frame, 4... Sheath section, 8... Operating rod, 17... Trip spring, 18... Pneumatic operating device, 19... Air tank, 21... Bell crank, 23... Connection rod , 28... Piston rod, 30a... First chamber, 30b... Second chamber,
31, 37, 48...Pipeline, 38...Switching valve, 3
9... Spool, 40... Second chamber, 41... First
Chamber, 42...Third chamber, 43...Piston chamber, 44
... Piston, 45 ... Rod, 50 ... Solenoid switching valve.

Claims (1)

[Claims] 1. The intermediate portions of a plurality of dogleg-shaped bell cranks 21 are rotatably provided in the frame 3, and one end of each bell crank 21 is placed upright on the frame 3. The other end of each of the bell cranks 21 is pivotally connected to a connecting rod 23 which is swingable and extends horizontally, and one end of the connecting rod 23 is provided with a broken portion of each of the arms. 4 is provided with a tripping spring 17 that can be freely operated by tripping, and one end of one of the bell cranks 21 is provided extending from the pivot point of the operating rod 8, and the tip of each of the bell cranks 21 is provided with a tripping spring 17 that can be freely operated. The tip of the piston rod 28 of the pneumatic operating device 18 for closing the part 4 is connected via a link mechanism,
The first chamber 30a on the rod side of the pneumatic operating device 18
is opened to the atmosphere, and the second chamber 30b is closed to the switching valve 3.
Air tank 1 is connected to air tank 1 by pipes 31 and 37 via
9, and the switching valve 38 is connected to the pipe line in order by a movable rod 45, a pair of spools 39, 39, and a piston 44 having a larger outer diameter than the pair of spools 39, 39. A first pipe communicating with the pipe line 31 via a pipe line 48 branched from the pipe line 31
A second chamber that allows communication between the chamber 41 and the conduits 31 and 37
a chamber 40 and a third chamber 4 in which the pipe line 31 can be opened to the atmosphere;
2 and a piston chamber 43 which communicates with the conduit 37 via a 3-port, 2-position electromagnetic switching valve 50.