JPS6139896Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention ensures the safety of the plant by closing the emergency shutoff valve using the force of a coil spring, etc. upon receiving a detection signal that detects an emergency situation. The present invention also relates to an opening/closing device for an emergency shutoff valve that can be easily returned to its original state.

[Prior Art] Conventional emergency shutoff valves require an operating source such as pressurized air or hydraulic pressure for their operation.

[Problem that the invention attempts to solve]

Therefore, the conventional emergency shutoff valve has a complicated structure, and has the problem that its function as an emergency shutoff valve is impaired due to a failure or erroneous operation of its operating source.

Another problem with conventional emergency shutoff valves is that once they are activated, it takes time and effort to return them to their original positions.

[Means for solving problems]

The present invention relates to an emergency shutoff valve opening/closing device that utilizes the force of a coil spring to reliably operate the emergency shutoff valve and to easily return to its original position. a solenoid 1 which is connected and has a plunger 4 protruding to one side; and a solenoid 1 located at an extended length of the plunger 4;
The first cam 3 is biased by a spring in the direction of the plunger 4, and the slope formed on one end surface is in contact with the tip of the plunger 4. The first cam 3 is integrated with the first piston 8 enclosed in the vertical cylinder 14. a first piston rod 6 which is biased downward by a spring and whose portion is locked to the upper surface of the first cam 3 to prevent its descent; and a second cam which is integral with the first piston rod 6. 1
6, and is integrated with the second piston 21 which is encircled within the horizontal cylinder 17, and the tip thereof is connected to the second cam 1.
A second piston rod 20 is provided with a protruding force by a spring so as to press against the side surface of the valve. An operating piece 31 configured to close and open the emergency shutoff valve 29 by rotating the valve 30.
and raising the first piston 8 against the spring,
and the second piston 21 is moved against the spring to the second cam 1.
The plunger 4 is provided with means capable of supplying high-pressure air into the vertical cylinder 14 and the horizontal cylinder 17 in order to move it in a direction away from the plunger 4, and when an emergency is detected and the solenoid 1 is energized, the plunger 4 protrudes. The first cam 3 is moved so that the first piston rod 6 is lowered and the second cam 16 is moved toward the second piston rod 20.
This causes the second piston rod 20 to protrude, rotate the operating piece 31, close the emergency shutoff valve 29, and supply high pressure air into the vertical cylinder 14 and the horizontal cylinder 17. 1 piston rod 6
is raised and released from the first cam 3, so that the plunger 4 of the solenoid 1 is retracted to its original position, and the second piston rod 20 moves in a direction away from the second cam 16, and is activated by the actuating piece 31. The relative positions of each of the above elements are determined so that the emergency shutoff valve 29 is opened.

〔Example〕

Hereinafter, a description will be given based on an embodiment shown in the accompanying drawings.

FIG. 1 shows an embodiment of the emergency shutoff valve of the present invention when it is opened.

Reference numeral 1 denotes a solenoid fixed to the outside of a rectangular housing 2, and this solenoid 1 is electrically connected to an emergency sensing device (not shown) such as a seismometer or a fire alarm. .

Reference numeral 3 denotes a first cam having a trapezoidal shape with an obliquely notched right end surface, on which the tip of the plunger 4 of the solenoid 1 that penetrates the right wall of the housing 2 comes into contact; A coil spring 5 is compressed between the cam 3 and the left wall of the housing 2.

Reference numeral 6 denotes a first piston rod that extends vertically and is inserted into a circular hole 7 bored at the lower end of the housing 2, and the upper surface of the first piston 8 connected to the lower end and the lower wall of the housing 2 are connected to each other. It is biased downward by a coil spring 9 that is compressed between. A locking piece 10 is protruded from the front surface of the upper end of the first piston rod 6, and the locking piece 10 is in contact with the upper surface of the cam 3.

Reference numeral 11 denotes a return lever pivotally attached to the upper end of a short rod 12 that projects upward from the upper end of the first piston rod 6.

Reference numeral 13 denotes a connecting rod fixed to the lower surface of the first piston 8. The rod 13 is fixed to the lower wall of the casing 2 and connects to the vertical cylinder 14 that houses the first piston 8 and the coil spring 9. A second cam 16 having an inverted L-shape is fixed to the lower end of the circular hole 15 formed in the lower wall.

17 is an almost cylindrical horizontal cylinder whose lower surface on the right end bulges downward; the horizontal cylinder 17
A circular hole 18 is bored in the center of the right end wall, and a screw hole 19 is bored in the center of the left end wall.

Reference numeral 20 designates a second piston rod having a second piston 21 connected to its left end that slides within the horizontal cylinder 17, and the piston rod 20 is compressed between the second piston 21 and the left end wall of the horizontal cylinder 17. is biased rightward by the coil spring 22,
A pressing piece 23 fixed to the right end of the second piston rod 20 presses the left side surface of the second cam 16.

A cylindrical guide tube 24 projects leftward from the center of the left side surface of the second piston 21, and its left end is bent inward to form a locking piece 25.

26 has an enlarged diameter flange 26a at the right end fitted into the guide tube 24, and a left end fitted into the screw hole 1.
9 and protrudes to the left of the horizontal cylinder 17, and is movable in the left-right direction by rotating a handle 27 fixed to the left end of the screw shaft.

Reference numeral 28 denotes a pin protruding forward at approximately the center of the second piston rod 20 in the length direction. It fits into the fork.

32 is the lower part of the lower box 14 and the horizontal cylinder 17
A supply source of high-pressure air to be supplied into the interior, 33 is a two-way cock, and 34 is a conduit.

When the sensing device detects an emergency situation and the solenoid 1 is energized, the plunger 4 extends and the first
Push the cam 3 to the left against the bias of the coil spring 5.

Therefore, the locking piece 10 on the first piston rod 6 supported by the first cam 3 is pushed downward by the coil spring 9 and comes into contact with the plunger 4.

Then, the cam 1 along with the first piston rod 6
6 is lowered, and the second piston rod 20, which had been prevented from moving to the right by the cam 16, moves to the right by the force of the coil spring 22.

Due to the pin 28 moving together with the second piston rod 20, the actuating piece 31 is rotated clockwise.
Immediately and reliably close the emergency shutoff valve 29 (FIG. 2).

Next, the procedure for returning the above-mentioned device to its original position after the emergency situation has been resolved will be explained based on FIG. 2.

The cock 33 is opened and high pressure air in the air supply source 32 is supplied to the lower chamber of the vertical cylinder 14 and the right side of the horizontal cylinder 17 through the conduits 34, 34.

Then, the second piston 21 is moved by the coil spring 22
The first piston 8 moves to the left against the coil spring 9, and moves upward against the coil spring 9.

When the locking piece 10 moves upward together with the first piston 8, the first cam 3, which had been prevented from moving to the right by the locking piece 10, moves to the right due to the force of the coil spring 5, and Pull into position and return.

Manual recovery is also possible. In this case, turn the handle 27, move the screw shaft 26 to the left, and insert the enlarged diameter flange 26a at the right end of the screw shaft 26 into the guide tube 24.
After engaging, the guide tube 24 and the second piston rod 20 are moved to the left together with the screw shaft 26 (imaginary line in FIG. 2). As a result, the emergency shutoff valve 29 is opened.

Subsequently, when the first piston rod 6 is pulled up against the coil spring 9 using the return lever 11,
The locking piece 10 is separated from the inclined surface of the first cam 3 and
Cam 3 moves to the right.

Thereafter, when the handle 27 is rotated in the opposite direction, the entire device returns to its original position.

[Effect of idea]

As mentioned above, the present invention uses a coil spring or the like to close the emergency shutoff valve.
Operation is reliable and emergency situations can be dealt with appropriately.

In addition, the coil spring or the like can be easily returned to its original position by simply applying an external force in the opposite direction, so that the operation does not take much time.

Return to the original position is achieved by supplying compressed air to open the shutoff valve, allowing remote control.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing when an emergency shutoff valve equipped with an embodiment of the device of the present invention is opened, and FIG. 2 is a schematic diagram showing the same when it is closed. 1... Solenoid, 2... Housing, 3... First cam, 4... Plunger, 5... Coil spring, 6
...First piston rod, 7 ... Circular hole, 8 ... First piston, 9 ... Coil spring, 10 ... Locking piece, 11 ... Return lever, 12 ... Rod, 13
...Connection rod, 14...Vertical cylinder, 15
... circular hole, 16 ... second cam, 17 ... horizontal cylinder, 18 ... circular hole, 19 ... screw hole, 20 ...
Second piston rod, 21...Second piston, 2
2... Coil spring, 23... Pressing piece, 24... Guide cylinder, 25... Locking piece, 26... Spiral shaft, 26a
...Expanded diameter flange, 27...Handle, 28...Pin, 29...Emergency shutoff valve, 30...Valve shaft, 31...
... Actuation piece, 32 ... Air supply source, 33 ... Two-way cock, 34 ... Conduit.

Claims (1)

[Scope of Claim for Utility Model Registration] A solenoid 1 electrically connected to an emergency situation sensing device and having a plunger 4 protruding to one side;
The first cam 3 is biased by a spring in the direction of the plunger 4, and the slope formed on one end surface is in contact with the tip of the plunger 4. The first cam 3 is integrated with the first piston 8 enclosed in the vertical cylinder 14. a first piston rod 6 which is biased downward by a spring and whose portion is locked to the upper surface of the first cam 3 to prevent its descent; and a second cam which is integral with the first piston rod 6. 1
6, and is integrated with the second piston 21 ringed in the horizontal cylinder 17, and the tip thereof is connected to the second cam 1.
A second piston rod 20 is provided with a protruding force by a spring so as to press against the side surface of the valve. An operating piece 31 configured to close and open the emergency shutoff valve 29 by rotating the valve 30.
and raising the first piston 8 against the spring,
and the second piston 21 is moved against the spring to the second cam 1.
The plunger 4 is provided with means capable of supplying high-pressure air into the vertical cylinder 14 and the horizontal cylinder 17 in order to move it in a direction away from the plunger 4, and when an emergency is detected and the solenoid 1 is energized, the plunger 4 protrudes. The first cam 3 is moved so that the first piston rod 6 is lowered and the second cam 16 is moved toward the second piston rod 20.
This causes the second piston rod 20 to protrude, rotate the operating piece 31, close the emergency shutoff valve 29, and supply high pressure air into the vertical cylinder 14 and the horizontal cylinder 17. 1 piston rod 6
is raised and released from the first cam 3, so that the plunger 4 of the solenoid 1 is retracted to its original position, and the second piston rod 20 moves in a direction away from the second cam 16, and is activated by the actuating piece 31. An opening/closing device for an emergency shutoff valve, in which the relative positions of each of the above-mentioned elements are determined so that the emergency shutoff valve 29 is opened.