JPS6340336B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a return device for a valve that controls compressible fluid in the operation mechanism of a shield disconnector, and is an attempt to make the device compact and simple, and to operate quickly and reliably. be.

Conventionally, the return device after the control valve has been removed has typically been achieved by, for example, controlling the air in a separately provided piston or cylinder. In this case, the structure is complicated, and since control is performed by an air system, there is a drawback that adjustment of the diaphragm, etc. is required. The present invention has been made in view of this point.

FIG. 1 shows a combination of a cylinder and an operating mechanism control valve according to the present invention.

In the figure, reference numeral 1 denotes an operating rod, the tip of which is connected to a piston 33 and a contact of a disconnector (not shown). A cam lever 4 rotates around a pin 6, and is connected to an operating rod 1 through a link 3 through pins 2 and 5, forming a return device for the valve stem press locking device. A roller lever 7 rotates around a pin 8, and rollers 10 and 12 are attached by pins 9 and 11. 13 is a latch that can be rotated around pin 14. Reference numeral 15 is a return spring that presses the latch 13, and constitutes a valve stem pressing locking device. 16 is an electromagnet, and 7 is a rod of the electromagnet, which constitutes a lock release device. 18 is a control valve chamber containing a control valve, and 19 is a cylindrical valve that controls compressible fluid.
20 is an O-ring that prevents leakage of compressible fluid. Reference numeral 21 denotes a valve rod for moving the cylindrical valve 19, which is provided so as to protrude from the control valve chamber. 22 is a discharge hole in the cylindrical valve 19, 23 is a compression drive spring that pushes up the valve stem 21, and 24 is an annular convex portion at the bottom of the cylindrical valve 19 that contacts the gasket 25. 26 is 19
When the cylindrical valve 19 moves upwardly, the end at the top of the cylindrical valve closes the exhaust hole 27 in the control valve chamber 18. Reference numeral 28 is a pressurized compressible fluid reservoir connected to an external tank (not shown). 29 is a hole provided in the upper plate 32 through which compressible fluid flows into or out of the space 30. 31 is a cylinder, 32 is an upper plate, and 33 is a piston.

Next, the operation will be explained.

FIG. 1 shows the state before operation, in which the piston 33 is located on the side of the upper plate 32 where the control valve chamber 18 is located. The roller lever 7 has a roller 12 and a valve stem 2.
1 are in contact with each other and try to rotate about the pin 8 by the drive spring 23, but the rotation is stopped by the engagement with the latch 13. The cylindrical valve 19 is held down by the roller lever 7, and the convex portion 24 is pressed against the gasket 25 to prevent compressible fluid from entering the space 30 from the air chamber 28. Now, as shown in FIG. 2, when a signal enters the electromagnet 16, the rod 17 moves upward and closes the latch 13. When the latch 13 rotates in the direction of arrow A around the pin 14, it is disengaged from the roller lever 7, and the roller lever 7 can now rotate around the pin 8 (in the direction B), and the valve stem 21 is pushed upward by the drive spring 23, and the roller lever 7 rotates in the direction of arrow B in FIG.
The cylindrical valve 19 at the lower end of the valve stem also rises upward together with the valve stem 21. Upon upward movement, the upper end 26 of the cylindrical valve 19 closes the outlet hole 27 of the control valve chamber 18 so that compressible fluid flows from the plenum chamber 28 through the hole 29 into the space 30 . The piston 33 is forced by the pressure of the compressible fluid and moves downward. As shown in FIG. 3, when the piston 33 comes near the other end, the link 3 attached to the operating rod 1 connected to the piston 33 via the pin 2 also moves, and the link 3 attached via the link 3 and the pin 5 moves. The cam lever 4 shown in FIG. 3 rotates in the direction of arrow C in FIG. Cam lever 4
When the roller 1 rotates, the roller 1 on the roller lever 7
0, and when the cam lever 7 rotates in the direction of arrow C, the roller lever 7 rotates around the pin 8 in the direction of arrow B' in the opposite direction to the direction B in FIG. pushes the valve stem 21 downward. The cylindrical valve 19 is moved downward by the movement of the valve stem 21. When the piston reaches its final position, the cylindrical valve 19 stops against the seal 25 on the top plate 32, as shown in FIG. At the same time, the roller lever 7 engages the latch 13, which is about to return to its original position by the return spring 15, when the signal from the electromagnet 16 is cut off and the rod 17 returns.
When the cylindrical valve 19 hits the packing 25, the compressible fluid stops flowing into the space 30, and at the same time, the compressible fluid in the space 30 is passed through the hole 29 and discharged from the discharge hole 22 inside the cylindrical valve 19 into the control valve chamber. The gas is discharged to the outside through the discharge hole 27 at 18 as shown by arrow D, and the pressure inside the cylinder 31 is quickly lowered.

Next, to move from FIG. 3 to FIG. 1, the piston 33 is moved upward by the same device mounted on the opposite side or by another drive source. At this time, space 30
The compressible fluid inside the hole 29 is compressed.
Since it passes through the inside of the cylindrical valve 19 and exits through the discharge hole 27, it does not affect the operation. Further, the operating rod 1 moves upward together with the piston 33, and the cam lever 4 connected to the link 3 moves to the third position.
Rotate in the opposite direction to the direction of arrow C in the figure. The roller lever 7 tries to rotate in the direction of arrow B in FIG. 2 by the drive spring 23 via the valve stem 21, but is stopped by the engagement with the latch 13. Therefore, the valve stem 21 does not move, and the cylindrical valve 19 also does not move, so the compressible fluid does not enter the space 30 and the operation ends.

According to the present invention, the operation of the operating rod 1 that directly transmits the operation of the piston is used to close the cylindrical valve 19 that controls the compressible fluid completely mechanically, and the operation of the operation rod 1 that directly transmits the operation of the piston is performed. Since the cylindrical valve 19 can be moved directly by simply removing the cylindrical valve 19, the structure is simplified and the operation is reliable and reliable. Furthermore, pin 2, pin 6, pin 8, pin 14
are in the same plane, and the operations of the electromagnet 16, cylindrical valve 19, and operating rod 1 are parallel, so the control valve can be placed in a small space on the upper plate 32, making it extremely compact. . As described above, if this control valve is used, the operation can be reliably transmitted through the movement of the piston, the valve can be opened and closed at high speed, and the piston can quickly reciprocate.

[Brief explanation of the drawing]

1, 2, and 3 are sectional views of essential parts showing an example of the device of the present invention combined with a cylinder, in which FIG. 1 shows the state before operation, FIG.
The figure shows the state when the operation is completed. In the figure, 1 is an operating rod, 4 is a cam lever, 7 is a roller lever, 13 is a latch, 16 is an electromagnet, 19 is a cylindrical valve, 21 is a valve stem, 23 is a drive spring that moves the valve stem, 31 is a cylinder, and 33 is a It's a piston. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A cylindrical valve whose axial center is arranged parallel to the axis of the piston in a path for guiding the compressible fluid to a cylinder housing the piston of a breaker operating mechanism driven by a compressible fluid, this cylindrical valve a control valve chamber having a control valve chamber therein, a valve stem connected to the cylindrical valve and whose tip protrudes from the control valve chamber, a driving spring that biases the valve stem so as to be able to move the cylindrical valve to open the passage; A locking device for pressing the valve stem consisting of a roller lever that contacts the tip of the rod and a latch that locks the roller lever in the closed position of the cylindrical valve, a locking and releasing device that operates the latch, and a locking device that operates the latch; Operation of a cylindrical disconnector, which is connected to an operating rod to which the movement is transmitted, and is provided with a cam lever that can come into contact with the roller lever as the piston moves and move the cylindrical valve to a closed position via the roller lever. Control valve device for mechanisms.