JP3840317B2 - Air operated valve with manual mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air operated valve with a manual mechanism capable of opening and closing a valve for controlling a fluid flow manually and by air pressure.
[0002]
[Prior art]
In a conventional fluid apparatus that includes an air operated valve and performs fluid control by remote operation, a manual device such as a manual valve or a manual pump that manually controls the flow of fluid is provided in addition to the air operated valve. Examples of such a fluid device include those described in JP-A-59-110903. Therefore, the manual device published in the publication will be briefly described. FIG. 5 is a cross-sectional view showing a manual pump described in the publication.
The piston 101 is manually operated by a pump handle 102, and a seed 103 is connected to a shaft 105 of the piston 101 and pivots around a poppet pin 106. The stopper 107 is engaged with the sheath 103 by the protrusion 108. This maintains the piston 101 in the upright position when not in use.
[0003]
Therefore, for example, when an operator pushes the handle 102 downward, air is drawn out to the upper space of the piston 101 through the vent holes 111 and 112, and the upper space 114 of the small lockout pin 113 is in a state where the pressure is considerably reduced. It is burned. The small lockout pin 113 is sucked and pulled up by the downward movement of the piston 101. Accordingly, the poppet 115 is seated on the seat, and the hydraulic fluid filled in the lower piston chamber 116 flows from the port 117 to the passage 118, opens the check valve 119, and flows to the output port 120.
[0004]
[Problems to be solved by the invention]
However, if a conventional manual device such as a valve or a pump is provided with a manual valve or the like and an air operated valve, as shown in FIG. This is not preferable for fluid control that requires high purity.
Further, it is not preferable in that the installation space for the valve is increased and the cost for the valve is increased.
Furthermore, since the manual opening and closing and the on-off valve that can be remotely operated by air are separate, in the case of a manual device, the operator must attach to the manual device to perform the opening and closing operation, It was inconvenient.
[0005]
Therefore, in the present invention, there is provided an air operated valve with a manual mechanism capable of realizing a low cost with a small liquid pool and a small installation area by using only one manual valve and an air operated valve in order to solve such problems. For the purpose.
[0006]
[Means for Solving the Problems]
An air operated valve with a manual mechanism according to the present invention includes a valve body formed with a valve seat in a communication hole that communicates an input port and an output port, a piston that moves coaxially with the valve seat, and the piston in the valve seat direction. A piston cylinder integrally formed on the valve body, a piston rod protruding from the axial center of the piston, and a piston rod fixed to the lower end of the piston rod. A diaphragm valve body that contacts and separates from the valve seat by vertical movement, and an opening / closing operation that is pivotally supported by an upper end portion of the piston rod penetrating the piston cylinder so that the diaphragm valve body is separated from the valve seat. And a knob.
[0007]
Therefore, in the case of remote control, air pressure is applied to the piston urged by the urging member, and the diaphragm valve element fixed to the piston rod is opened away from the valve seat when the piston rises. Further, when the piston energized by the urging member is lowered by removing the air that pressurizes the piston, the diaphragm valve element fixed to the piston rod comes into contact with the valve seat and closes.
On the other hand, in the case of manual operation, the diaphragm valve body is opened away from the valve seat by rotating the open / close knob to raise the piston rod. Further, the piston rod is lowered by rotating the open / close knob in the reverse direction, and the diaphragm valve body is brought into contact with the valve seat to close the valve.
Therefore, in the air operated valve with a manual mechanism of the present invention, as a manual valve, an air operated valve, and one valve, it is possible to realize a low cost with a small liquid pool and a small installation area.
[0008]
In the air operated valve with a manual mechanism of the present invention, the open / close knob is rotated to lift the piston rod by lever, and the open / close knob is rotated while the diaphragm valve body is separated from the valve seat. It has a stopper for stopping.
Therefore, after the valve is manually opened, the valve open state can be maintained unless the stopper of the opening / closing knob is released from the stopper.
[0009]
In the air operated valve with a manual mechanism of the present invention, the opening / closing knob is rotated to lift the piston rod by lever to separate the diaphragm valve body from the valve seat, and then apply air pressure to the piston. By raising the piston rod, the balance between the opening / closing knob and the piston rod is lost, and the opening / closing of the valve is switched to the air operation.
Therefore, after opening the valve by manual opening / closing which rotates the open / close knob, the valve can be closed again by remote operation by air operation, so that forgetting to close is prevented and handling is simplified.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of an air operated valve with a manual mechanism according to the present invention will be described in detail. 1 to 3 are sectional views showing an embodiment of an air operated valve with a manual mechanism. FIG. 1 is a valve closing state, FIG. 2 is a valve opening operation by remote operation, and FIG. The time of valve was shown.
The air operated valve with a manual mechanism of the present embodiment is configured by integrating a valve body 1, a cylinder 2 and a cover 3. In the valve body 1, an input port 11 and an output port 12 communicate with each other through a valve hole 14 that forms a valve seat 13. The valve hole 14 is directly connected to the output port 12 side and protrudes upward, and an input path 15 that is outside and communicates with the input port 11 is opened above the valve body 1.
[0011]
A diaphragm valve body 16 that contacts and separates from the valve seat 13 is sandwiched and fixed between the valve body 1 and the cylinder 2 that are integrally fixed. Therefore, the valve body 1 and the cylinder 2 are hermetically partitioned by the diaphragm valve body 16, and the fluid flowing in the valve body 1 does not leak to the cylinder 2 side.
The cylinder 2 constitutes an airtight container closed by the cover 3 and is loaded with a piston 21 that slides therein. The piston 21 divides the space in the cylinder 2 into two upper and lower chambers, and an operation port 23 communicates with the pressurizing chamber 22 below. On the other hand, a spring 24 that urges the piston 21 downward is loaded above the piston 21.
[0012]
Further, the piston 21 integrally has piston rods 25 and 26 projecting downward and upward on its axis, and penetrates through holes 27 and 31 formed in the cylinder 2 and the cover 3, respectively. Yes. The piston rods 25 and 26 are inserted into the through holes 27 and 31 via O-rings and are configured to slide in an airtight manner. The piston rods 25 and 26 are formed integrally with the piston 21, but may be separate members penetrating the piston 21.
The piston rod 25 projecting downward extends to the valve body 1 side, and a diaphragm valve body 16 is fixed to the tip thereof. On the other hand, the piston rod 26 projecting upward extends through the cover 3, and an open / close knob 41 as shown is pivotally supported.
[0013]
The opening / closing knob 41 having a predetermined length is pivotally supported by a rotating shaft 42 penetrating a point biased to one end, and a curved guide surface 41a is formed on the short piece side (left side in the drawing). The guide surface 41a is in sliding contact with the top surface of the cover 3 by the rotation of the opening / closing knob 41 (see FIG. 3).
A stopper 32 is formed on the cover 3 located on the short side of the open / close knob 41. A hole 33 is formed in the cover 3, and the stopper 32 formed so as not to come out of the hole 33 is urged upward by a spring 34. The stopper 32 protruding from the hole 33 is formed with a notch 32a on which the corner 41b of the opening / closing knob 41 is hooked (see FIG. 3).
[0014]
The air operated valve with a manual mechanism according to the present embodiment configured as described above operates as follows.
First, when the opening / closing knob 41 is not operated and air is not inserted into the pressurizing chamber 21, the piston 21 is urged downward by a spring 24 as shown in FIG. The valve seat 13 is in contact with the valve seat 13. Therefore, the fluid flowing in from the input port 11 flows through the input path 15 but does not pass through the valve hole 14 blocked by the diaphragm valve body 16 and does not flow to the output port 12 side.
Therefore, when the valve is opened, particularly when remotely operated, air is supplied from the operation port 23 by a compressor (not shown). Therefore, the piston 21 slides on the cylinder 2 due to the air pressure in the pressurizing chamber 22 and rises against the urging force of the spring 24.
[0015]
As the piston 21 rises, the piston rods 25 and 26 also rise, and the diaphragm valve body 16 fixed to the piston rod 25 also rises to separate from the valve seat 13. Accordingly, a flow path space is formed between the valve seat 13 and the diaphragm valve body 16, and the input port 11, the input path 15, the valve hole 14, and the output port 12 communicate with each other, so that the supplied fluid is discharged.
On the other hand, the opening / closing knob 41 pivotally supported by the piston rod 26 penetrating the cover 3 is tilted with the position of the fulcrum pivotally supported by the rotating shaft 42 as shown in FIG. It only becomes.
[0016]
And when closing a valve by remote operation, the air supplied in the pressurization room 22 is extracted, and it decompresses. If the air pressure in the pressurizing chamber that urges the piston 21 upward is reduced, the piston 21 is pushed down by the urging force of the spring 24 fitted upward. Therefore, the diaphragm valve body 16 at the lower end of the piston rod 25 also descends and comes into contact with the valve seat 13, so that the flow path is shut off and the flow of fluid is stopped.
[0017]
Next, when the valve is opened manually, the open / close knob 41 is rotated counterclockwise from the closed state of FIG. Then, the rotation of the opening / closing knob 41 that was initially rotating around the rotation shaft 42 is restricted by the guide surface 41 a coming into contact with the top surface of the cover 3. The opening / closing knob 41 whose rotation is restricted tries to continue to rotate counterclockwise with the contact point of the guide surface 41a in contact with the cover 3 as a fulcrum. However, the opening / closing knob 41 pivotally supported by the piston rod 26 rotates only when the piston rod 26 moves only in the axial direction, so that the guide surface 41a slides on the top surface of the cover 3, and The position rises. And when it rotated to the position shown in FIG. 3, the corner | angular part 41b of the opening / closing knob 41 is hooked on the notch 32a of the stopper 32, and is latched.
[0018]
By rotating the opening / closing knob 41 in this way, the piston rod 26 is lifted by the lever action, and similarly, the piston 21 and the piston rod 25 are also lifted. Therefore, when the diaphragm valve body 16 is separated from the valve seat 13, a flow space is created between the valve seat 13 and the diaphragm valve body 16, and the input port 11, the input path 15, the valve hole 14, and the output port 12 are provided. Since it communicates, the supplied fluid is discharged.
On the other hand, when the valve is closed manually, the corner portion 41b of the opening / closing knob 41 is removed from the notch 32a of the stopper 32, and the piston 21 is biased by the lever operation of the opening / closing knob 41 sliding the guide surface 41a and the biasing force of the spring 24. As a result, the diaphragm valve body 16 comes into contact with the valve seat 13 and the valve is shut off.
[0019]
Further, a case will be described in which the valve is manually closed from the opened state as described above. As shown in FIG. 3, the open / close knob 41 is rotated counterclockwise to open the valve, and then air is supplied from the operation port 23 into the pressurizing chamber 22. When the valve is opened manually, the space between the piston 21 and the cover 3 has room as shown in FIG. 3, so that the piston 21 can be further raised by the air pressure. When the piston 21 is raised by the air pressure, the piston rod 26 is also raised, and the position of the rotary shaft 42 of the opening / closing knob 41 is raised.
On the other hand, as can be seen from FIG. 3, the manually opened state is maintained by a balance between the downward biasing force of the spring 24 and the moment applied to the rotating shaft 42 of the opening / closing knob 41 engaged with the stopper 32. . Therefore, when the piston 21 is raised by the air pressure, the rotation shaft 42 of the rotary knob 41 is raised, so that the corner portion 41 b is detached from the stopper 32. Then, the open / close knob 41 rotates clockwise to a state as shown in FIG. 2, and at that timing, the air in the pressurizing chamber 22 is again extracted and depressurized to lower the piston 21. Accordingly, the diaphragm valve body 16 to which the piston rod 25 is fixed contacts the valve seat 13 and is closed.
[0020]
Therefore, the air operated valve with a manual mechanism according to the present embodiment is configured so that the valve can be opened and closed by a manual operation and a remote operation with a single valve. The liquid pool was reduced by reducing the flow path in the device, which was easy to collect liquid because it was equipped with an operation valve.
In addition, the cost associated with the valve device could be reduced by using one valve.
Further, since the valve can be closed again by air operation after the valve is manually opened by the opening / closing knob 41, the handling thereof is very simple.
[0021]
Note that the air operated valve with a manual mechanism of the present invention is not limited to that of the above-described embodiment, and various modifications can be made without departing from the spirit thereof.
For example, in the above embodiment, the open / close knob 41 is locked to the stopper 32 to maintain the valve open state. However, if the open / close knob 51 having the shape shown in FIG. 4 is used, the stopper is not required. Can do. That is, the open / close knob 51 is rotated counterclockwise, and the piston 53 and the piston rod 54 are raised by lever with the guide surface 51 in contact with the top surface of the cover 52 as a fulcrum. The valve opening state is maintained by raising the opening / closing knob 51 vertically and bringing the locking surface 51b into contact with the top surface of the cover 52.
[0022]
【The invention's effect】
The present invention relates to a valve body having a valve seat formed in a communication hole that communicates an input port and an output port, a piston that moves coaxially with the valve seat, and a biasing member that biases the piston in the valve seat direction. A piston cylinder formed integrally with the valve body, a piston rod projecting from the axial center of the piston, and fixed to the lower end of the piston rod so as to contact and separate from the valve seat by the vertical movement of the piston rod A diaphragm valve body, and an opening / closing knob that is pivotally supported by an upper end of a piston rod penetrating the piston cylinder and separates the piston rod from the valve seat by lever, so that a manual valve and an air operated valve are provided. It is possible to provide a low-cost air-operated valve with a manual mechanism that has a small liquid pool and a small installation area.
[0023]
Further, the present invention has a stopper for locking the rotation of the opening / closing knob in a state where the piston rod is lifted by rotating the opening / closing knob and the diaphragm valve body is separated from the valve seat. After opening, it is possible to provide an air operated valve with a manual mechanism that can maintain the valve opening state unless the stopper of the opening / closing knob is released from the stopper.
In addition, the present invention increases the piston rod by rotating the open / close knob to separate the diaphragm valve body from the valve seat, and then applies air pressure to the piston to further raise the piston rod, thereby Since the balance with the rod is broken and the valve is opened / closed to air operated, the valve can be opened and closed manually by rotating the open / close knob, and then the valve can be closed again remotely by air operation. It has become possible to provide an air operated valve with a manual mechanism that is prevented from being forgotten and easy to handle.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an air operated valve with a manual mechanism according to an embodiment of the present invention when the valve is closed.
FIG. 2 is a sectional view showing an embodiment of the air operated valve with a manual mechanism according to the present invention when the valve is opened by remote operation.
FIG. 3 is a cross-sectional view of the air operated valve with a manual mechanism according to an embodiment of the present invention when the valve is opened by manual operation.
FIG. 4 is a sectional view showing another embodiment of the air operated valve with a manual mechanism when the valve is closed.
FIG. 5 is a cross-sectional view showing a conventional manual device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Valve body 2 Cylinder 3 Cover 13 Valve seat 14 Valve hole 16 Diaphragm valve body 21 Piston 24 Spring 25, 26 Piston rod 32 Stopper 41 Opening / closing knob

Claims (1)

A valve body in which a valve seat is formed in a communication hole communicating the input port and the output port;
A piston cylinder that is formed integrally with the valve body, and includes a piston that moves coaxially with the valve seat, and a biasing member that biases the piston in the valve seat direction;
A piston rod protruding from the axial center of the piston;
A diaphragm valve body fixed to the lower end of the piston rod and contacting and separating from the valve seat by the vertical movement of the piston rod;
An opening / closing knob that is pivotally supported by an upper end portion of the piston rod penetrating the piston cylinder, and causes the diaphragm valve body to separate the piston rod from the valve seat;
A stopper formed with a notch for rotating the opening / closing knob to lift the piston rod by lever and hooking and locking the corner of the opening / closing knob in a state where the diaphragm valve body is separated from the valve seat. And
After the diaphragm valve body is separated from the valve seat by operating the opening / closing knob, air pressure is applied to the piston, the piston rod is further lifted, and the locking of the opening / closing knob by the stopper is released. An air operated valve with a manual mechanism, wherein the opening and closing of the valve is switched from the operation by the opening / closing knob to the air operated .

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