JPS5832065Y2 - Stop valve opening/closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an apparatus for slowly opening a stop valve in a working flow path such as a high-pressure gas and rapidly opening the stop valve.

Conventionally, stop valves have been either opened and closed slowly by a motor valve, etc., as disclosed in Japanese Patent Publication No. 38-2184, or rapidly opened and closed by a solenoid valve, but in the former case, accidents and power outages occurred. In the latter case, the valve cannot be closed quickly in an emergency, which is a major drawback in terms of safety.In the latter case, the valve cannot be opened slowly, so high-pressure gas such as helium can suddenly flow into fluid equipment such as expansion engines, heat exchangers, etc. This not only hinders the smooth operation of these devices, but also poses a risk of damaging these devices.

Therefore, the present invention aims to eliminate the above-mentioned drawbacks of the conventional valve opening/closing device, which opens the valve slowly and closes the valve rapidly, and which rotates the pinion for opening and closing the stop valve. A piston to which a rack is fixed is slidably fitted into a cylinder, and a pressure spring is built into the piston to force the piston to slide slowly in the valve opening direction and rapidly to slide in the valve closing direction. A round hole for supplying piston working fluid is connected to the cylinder, and when the piston is sliding slowly, a small amount of fluid is supplied into the cylinder through the orifice, and when the piston is sliding rapidly, a small amount of fluid is supplied into the cylinder through the orifice. Attach a valve body that allows a large amount of fluid to be discharged from the cylinder through the peripheral flow path, and slowly open the stop valve.
It is characterized by a structure that allows the valve to close quickly.

Hereinafter, embodiments of the present invention will be described based on the drawings. In FIGS. 1 and 2, which show two modes of operation of the valve of the present invention, a valve body 1 has small diameter end portions 2 formed with splines. .2' and a large-diameter disk portion 3, and both end portions 2,
2' is slidably fitted into a round hole 4' of the flange 4 and a round hole 5' of the valve seat 5, respectively, and the disc part 3 is fitted into a storage chamber 6 which has a slightly larger diameter and allows lateral movement. It is stored.

The end face of the flange 4 has several curved pieces 7 as shown in FIG.
is provided, so that the disc portion 3 of the valve body 1 does not come into close contact with the flange 4, and a fluid passage is always formed.

On the other hand, an O-ring 8 is provided on the right side of the disc portion 3 to prevent fluid from leaking when it comes into contact with the valve seat 5.

Note that the spline may be provided on at least one of the end portions 2 and 2', and the curved piece 7 may be provided on the disc portion 3.

The shape is not limited to that shown in FIG. 3, but may be any shape as long as it can prevent the disk portion 3 and the flange 4 from coming into close contact with each other and form a fluid flow path.

The valve body 1 is normally pushed to the right by the spring 9, so if the left side of the valve body 1 is under high pressure, the fluid flows through the flow path 10 provided in the valve body 1 as shown by the arrow in FIG. Only a small amount flows through the orifice 11.

The flow rate can be adjusted as appropriate by adjusting the diameter of the orifice 11.

However, when the right side of the valve body 1 becomes high pressure, the valve body 1 is pushed to the left and comes into contact with the curved piece 7, but as shown in FIG. formed,
Since there are no orifices in this flow path, a much higher fluid flow rate is achieved than through the central flow path where an orifice is present.

When the differential pressure disappears, the valve body 1 is automatically returned to its original position by the spring 9.

FIGS. 4 and 5 show an opening/closing device for a stop valve (for example, a ball valve) of the present invention using the above-mentioned valve.

A joint 12 is attached to the left end of the flange 4, from which pressure fluid is introduced and discharged.

A cylinder 13 is attached to the right side of the valve seat 5, a rack 16 is fixed to a piston 15 containing a pressure spring 14, and the rack 16 rotates a pinion 17 to open and close a stop valve 18.

The flange 19 is provided with an air inlet/outlet 20 so as not to interfere with the movement of the piston 15.

Now, FIG. 6 shows a more specific usage example of the stop valve opening/closing device shown in FIG. 4.

When the switch 21 is turned on, the three-way solenoid valve 22 opens the pipe a,
l) to communicate with each other.

There, the high pressure gas HG is guided to the joint 12, but in this case, as shown in FIG. 1, the high pressure gas HG only flows through the orifice 11 of the valve body 1.
The degree of increase in pressure on the left side of No. 5 is extremely gradual.

The piston 15 is therefore pushed to the right for removal, and this movement causes the stop valve 18 to open via the rack 16 and pinion 17.

Since the stop valve 18 also opens slowly, gas filling into the high-pressure gas equipment 23 is performed extremely slowly, preventing sudden pressurization and allowing safe operation.

Conversely, if the switch 21 is turned off, the conduit S is connected to the conduit C and is released to the low pressure gas LG.

Therefore, the cylinder 1 is compressed by the spring 14.
The gas in the valve body 3 causes the valve body 1 to be in the state shown in FIG. 2, and the gas quickly flows out through the periphery of the valve body 1.

Therefore, the return of the piston 15 is carried out rapidly, the stop valve 18 is quickly shut off, and pressurization of the fluid device is stopped.

As described above, according to the present invention, it is possible to provide a stop valve with the desirable functions of gradual opening and sudden closing, which do not cause shock to fluid equipment, and also to use the working fluid itself as a medium to generate electrical power. It can also be combined with remote control, and because both ends of the small diameter spline are slidably fitted into round holes, the central disc part can slide smoothly inside the storage chamber without swinging. The splines form a fluid flow path to ensure fluid supply and discharge, and the slow valve opening allows the working fluid to smoothly flow into the fluid equipment during operation, preventing sudden pressurization. This ensures safe operation, and the rapid valve closing allows the supply of working fluid to be immediately stopped in the event of a power outage or other abnormality, thereby stopping the operation of fluid equipment and preventing accidents and equipment damage. It has excellent effects such as being able to prevent accidents from occurring, and also has the features of a simple and inexpensive structure.

[Brief explanation of drawings]

1 and 2 are longitudinal sectional views showing two modes of operation of the valve, FIG. 3 is a perspective view of the flange end face, and FIG. 4 is a longitudinal sectional view of a stop valve opening/closing device using the valve of the present invention. Fifth
The figure is a left side view thereof, and FIG. 6 is a diagram showing a specific usage example of the stop valve opening/closing device of FIG. 4. 1... Valve body, 2, 2'... Both ends, 3... Disc part, 6... Storage chamber, 7
... Song piece, 10 ... Channel, 11 ...
...Onofisu, 13...Cylinder, 15.
... Piston, 16 ... Rack, 17.
...Pinion.

Claims (1)

[Scope of utility model registration request] A valve body having both small-diameter end portions with splines formed on at least one side and a large-diameter central disk portion, a flow path having an orifice extending through the valve body in the axial direction, and a sliding portion between the two end portions. a disc part storage chamber having a round hole that can be fitted into the disc part, has a slightly larger diameter than the disc part, and allows the disc part to move in the axial direction; one end wall surface of the storage chamber; and the disc part. a curved piece provided on one of the end surfaces to prevent these surfaces from coming into close contact; a cylinder communicating with the round hole on the orifice side of the valve body; and a piston having a built-in pressing spring that slides inside the cylinder. , a stop valve opening/closing device comprising a rack fixed to the piston and a stop valve opening/closing pinion meshing with the rack.