JPH0762505B2 - Valve opening indicator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve opening indicating device for externally confirming how open a valve body of a valve device for controlling various fluids.

[0002]

2. Description of the Related Art Conventionally, in a valve device for fluid control,
There is a difficulty in protruding the shaft of the valve body to the outside of the valve device,
Further, when the protrusion is made, the adjustment of the change of the pressure receiving area becomes complicated, so that there is no reliable method for visually confirming the opening degree of the valve body from the outside of the valve device.

[0003]

When displaying the movement of the valve body inside the valve device to the outside, a member protruding from a part of the valve body is pulled out to the outside of the valve device and physically displayed. Alternatively, there are two types of methods in which the operation of the valve body is electrically detected and displayed externally.

In the former case, it is necessary to draw out a member integrated with the valve body to the outside in a liquid-tight manner, so that structural difficulties are expected, and the member integrated with the valve body is an extension portion such as a valve rod. Therefore, if it is pulled out to the outside, there is a risk of giving unnecessary resistance to the valve rod, which is important for raising and lowering the valve body.

In addition, a moving member of the valve body is brought into contact with an appropriate position of the valve body of the valve device by the action of a spring or the like, without using a member integrated with the valve body, which is separately installed. Although it is conceivable that the display will be displayed, in a valve device that requires delicate adjustment with respect to the fluid pressure, it is not desirable to design a separate spring or the like to affect the valve body.

The latter is used for a valve device used for water supply, for example, even if a device which can achieve the purpose is obtained, the service life of electrical parts is insufficient, or the manufacturing cost is too high. It is a technology that is not familiar with, and it is difficult to put it into practical use.

[0007]

In the present invention, an opening degree indicating device, which is formed separately from the valve body of the valve device, is screwed and fixed to the valve device for use.

The driving force of the opening indicating device according to the present invention includes:
The pressure of the fluid supplied to the primary side of the valve device itself is used, and when the pressure of the fluid rises, the display unit of the opening degree indicating device moves.

A part of the display unit of the opening degree indicating device is brought into contact with the movable part of the valve device to which it is attached, and a part of the display unit that moves with the increase in the pressure of the fluid is always It abuts the movable part and follows it.

As the movable portion of such a valve device, the valve rod end portion of the valve body or the like is suitable. Thereby, the opening degree can be instructed in a form in which the display unit of the opening degree instruction device follows the movement of the valve body.

Therefore, the opening degree indicating device is composed of a cylinder and a piston, and one end of the piston shaft is brought into contact with the movable portion of the valve device.

The pressure water supplied to the primary side of the valve device is supplied to the first chamber of the cylinder divided into two parts by fitting the piston through the water conduit.

The second chamber of the cylinder, which is divided into two by fitting the piston, is opened to the atmosphere or hermetically seals the fluid (gas) (see FIG. 6).

Further, when the inside of the cylinder is made visible at least partially, the device of the present invention is completed. (This basic configuration is shown in FIG. 5)

In the device of the present invention, which is screwed and fixed to the valve device, for example, when the valve body of the valve device is in the completely closed position, the tip of the piston shaft is brought into contact with the valve rod of the valve body and stopped. .

When the pressure of the fluid supplied to the primary side of the valve device changes, the movable part of the valve device itself begins to move, and the fluid flows from the water conduit into the first chamber of the cylinder, causing the piston to move. It will push and push it towards the second chamber of the cylinder.

The pressed piston moves while releasing the air in the second chamber of the cylinder into the atmosphere or compressing the gas sealed in the second chamber, and the piston moves from the outside of the cylinder. The movement will be visible.

During this time, the piston shaft has its tip abutted against the valve rod of the valve device, and the piston also moves with the movement of the valve rod. Therefore, the amount of movement of the piston causes the valve rod or valve body to move. The amount of movement can be confirmed from the outside.

When the valve tie moves toward the closing direction and the pressure of the water supplied to the primary side of the valve device decreases, the pressure of the water supplied to the first chamber of the cylinder via the water conduit also decreases,
According to the movement of the valve body in the closing direction, the Biston shaft corresponding to it is pushed, the second chamber of the cylinder is pushed back to the starting position while inhaling the atmosphere, and the closing degree of the valve body or the degree of closing is outside. Visible from.

In the type in which the gas is hermetically sealed in the second chamber of the cylinder, when the pressure of the water in the first chamber is reduced, the gas in the second chamber of the cylinder, which has been compressed, expands to move the piston. At the same time as pushing back, the valve rod of the valve device pushes against the abutting piston shaft, so that the piston moves to return to the starting position.

In the case of a gas-tight seal in the second chamber of the cylinder, it is desirable for the device of the present invention to seal a compressible fluid, especially a gas.

[0022]

First Embodiment The first embodiment shown in FIGS. 1 to 4 is an actual product according to the present invention.

In FIG. 1, reference numeral 1 denotes a cylinder screwed to a valve device B in a liquid-tight manner, and a piston 2 is slidably fitted in an inner cavity 1a of the cylinder.

A piston shaft 3 and a display shaft 4 are provided on the piston 2 so as to project in the sliding direction thereof. The piston shaft 3 extends leftward in the drawing and penetrates the wall surface of the cylinder 1 to form a valve device. The tip is exposed inside B.

The display shaft 4 extends from the piston 2 to the right in the figure, penetrates the lid 5 that closes one end of the cylinder 1, and is a hollow display tube screwed to the outer surface of the lid 5. 6 has been inserted.

The display cylinder 6 is made of a transparent, semi-transparent or partially transparent material so that the display shaft 4 inserted into the internal display chamber 7 can be visually recognized from the outside. ing.

The inner end of the lid 5 screwed to the cylinder 1 has a space 1b in which a part of the inner cavity 1a of the cylinder 1 opens.
Is formed.

Reference numeral 8 is a water conduit having one end opening toward the inside of the valve device B and the other end opening into the space 1b.

The inner cavity 1a of the cylinder 1 is divided by the fitted piston 2 into a first chamber 9 (right side of the piston 2 in the figure) and a second chamber 10 (left side of the piston 2 in the figure). The first chamber 9 opens into the void 1b.

The second chamber 10 has a piston 2 and a display shaft 4.
It is connected to a display chamber 7 installed inside the display cylinder 6 by a conduction path 11 continuously formed in the display cylinder 6.

A display cap 12 is fixed to the tip of the display shaft 4 inside the display chamber 7. Display cap 1
2 is preferably made of a synthetic resin colored in a color with high visibility, but it is also possible to directly color the tip of the display shaft 4 instead.

In FIG. 1, the fluid supplied to the valve device B reaches the water conduit 8 of the cylinder 1, the gap 1b and the first chamber 9, and the second chamber 10 and the display chamber 7 are the atmosphere. There is an opening inside.

The tip of the piston shaft 3 is in contact with the shaft S of the movable part M inside the valve device B, and FIGS. 1, 2 and 3 show a state in which the valve of the valve device B is completely closed. Shows.

FIG. 2 shows a state in which the opening degree indicating device of the present invention is attached to the name "automatic valve" issued by the applicant of the present application in the past.

In this automatic valve, a main valve d is installed in a partition wall c separating the primary side a and the secondary side b in the main body V, a sub valve e is installed in a part of the main valve d, and a secondary valve e is installed. A pressing rod S that presses and opens the sub valve e and the main valve d projects from the piston M in the cylinder f installed on the side b.

By the piston M, the first chamber g and the second chamber h
The fluid taken out from the branch port i on the primary side a is supplied to the first chamber of the cylinder f divided into two parts through a valve or the like (not shown), and the fluid taken out from the first chamber g is supplied to an orifice or the like (not shown). The fluid taken out from the second chamber h is discharged to the junction j on the secondary side b.

In this automatic valve, the difference in internal pressure between the first chamber g and the second chamber h of the cylinder f is utilized to allow the gradual movement of the piston M and the auxiliary valve e and the main valve d. Gradual opening and closing is achieved.

In FIG. 2, the opening degree indicating device according to the present invention is screwed and fixed through a bottom plate (valve device B in the present invention) facing a piston (movable part M in the present invention) of a main body V of an automatic valve. Has been done.

The end of the piston shaft 3 of the device of the present invention is in contact with the tip of the pressing rod (the shaft S of the movable part M of the present invention) of the piston (the movable part M of the present invention) of the automatic valve.

The details of the opening degree indicating device of the present invention in the state bear in which the main valve d and the sub valve e of the automatic valve shown in FIG.
As shown in Figure 1 and FIG.

When the fluid is supplied to the first chamber g of the cylinder f of the automatic valve, the pressure in the first chamber g increases, and the pressure is increased by the water conduit 8 formed in the cylinder 1 of the device of the present invention. It is transmitted to the space 1b and the first chamber 9 of the inner cavity 1a of the cylinder 1.

When the pressure in the first chamber 9 increases, the piston 2 of the device of the present invention is pushed to the left in FIGS. 1 to 3,
The piston 2 discharges the air in the second chamber 10 of the inner cavity 1a of the cylinder 1 into the atmosphere.

Since the second chamber 10 and the display chamber 7 of the display cylinder 6 are connected by the conducting passage 11 formed in the display shaft 4 of the piston 2, the above-mentioned leftward movement of the piston 2 causes the display chamber to move. The air is released from 7, and the tip of the piston shaft 2 continues until it comes into contact with the shaft S of the movable portion M of the valve device B.

As a result, the tip of the piston shaft 3 is always in contact with the shaft S of the movable portion M of the valve device B and moves in a manner following the movement of the shaft S. By visually observing the movement amount, the movement amount of the movable portion M of the valve device B can be confirmed.

An example of the state in which the movement of the valve is displayed is shown in FIG. 4, in which the piston shaft 3 abutting on the shaft S of the movable portion M which has largely moved to the left and the movement in the display cylinder 6 have been moved. Display axis 4
It is shown.

The valve body of the valve device B is closed by lowering the pressure of the fluid supplied to the valve device B and moving the movable part M to the right in FIG. The pressure applied to the first chamber 9 of the inner cavity 1a of the valve 1 is also reduced as in the valve device B. When the movable part M pushes the tip of the piston shaft 3 to the right in the figure, the piston 2 moves to the cylinder 1
The second chamber 10 moves while inhaling the atmosphere and returns to the starting position in FIG.

In the meantime, the shaft S of the movable part M of the valve device B is always in contact with the piston shaft 3 of the piston 2 and returns to the state shown in FIGS. 3 and 1.

As described above, in the device of the present invention, the pressure of the fluid supplied to the valve device B is guided to one side of the piston 2 of the device of the present invention, and the pressure of the fluid rises, so that the piston 2
It is possible to move the piston 2 while releasing the air existing on the other side into the atmosphere, and always secure the movement of the piston 2 corresponding to the pressure change of the fluid in the valve device B.

[0049]

[Second Embodiment] The second embodiment is shown in FIG. 5, but the display shaft 4 and the display cylinder 6 shown in the first embodiment are not provided in this embodiment. Along with that,
There is no hole through which the display shaft 4 penetrates in the lid body 5,
The lid 5 only closes the inner cavity 1a of the cylinder 1 leaving a gap 1b.

The operation is exactly the same as in the first embodiment, the pressure of the fluid in the valve device B is applied to the first chamber 9 via the water conduit 8 and the gap 1b, and the air in the second chamber 10 is applied to the cylinder. It is released into the atmosphere via the conducting path 11 drilled in 1, which causes the piston 2 to move.

In this second embodiment, the cylinder 1
The whole or a part of is formed of a transparent or semi-transparent material, and the opening is read by installing a colored portion on the piston 2 in the cylinder 1.

[0052]

[Third Embodiment] The third embodiment is shown in FIG.
The second chamber 10 of the sealed inner cavity 1a of the cylinder 1 is filled with a compressible fluid (for example, gas).

When the pressure of the fluid supplied to the valve device B increases, the pressure in the first chamber 9 also increases, and the piston 2 moves leftward in the drawing while compressing the fluid in the second chamber 10. .

Since the tip of the piston shaft 3 of this embodiment is in contact with the shaft S of the valve device B as in the other embodiments, the movement of the piston shaft 3 to the left in the figure follows the shaft S. However, when the pressure of the fluid supplied to the valve device B decreases, the compressed fluid in the second chamber 10 expands, and the repulsive force of the fluid expands the piston 2 to the right in the figure. Movement is encouraged.

Also in the third embodiment, the cylinder 1 is wholly or partially transparent and semi-transparent, as in the first embodiment.

In the third embodiment, the piston 2 is given some automatic return force.

[0057]

As described above, according to the present invention, the valve device B
Since the change in the pressure of the fluid supplied to the device can be used as a drive source of the device of the present invention, and thereby the movement of the movable part M of the valve device B can be traced, without applying unnecessary pressure to the movable part M, There is an effect that the opening degree of the valve element in the valve device B can be displayed smoothly.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of the device of the present invention.

FIG. 2 is a cross-sectional view showing a state in which the embodiment shown in FIG. 1 is installed in a valve device.

3 is a cross-sectional view similar to FIG. 1 with a scale changed when the valve body of the valve device is in the closed position.

FIG. 4 is a cross-sectional view in the case where the valve body of the valve device is in the open position, according to the same display scale as in FIG.

FIG. 5 is a sectional view showing a second embodiment.

FIG. 6 is a sectional view showing a third embodiment.

[Explanation of symbols]

 1 Cylinder 1a Lumen 1b Gap 2 Piston 3 Piston shaft 4 Display shaft 5 Lid 6 Display cylinder 7 Display chamber 8 Water conduit 9 First chamber 10 Second chamber 11 Conductor 12 Display cap B Valve device (or bottom plate) M Movable part (or piston) S Shaft (or push rod) V Main body of valve device a Primary side b Secondary side c Partition wall d Main valve f Sub valve g First chamber h Second chamber i Branch port j Joint port

Claims (5)

[Claims] 1. A cylinder screwed through a main body of a valve device of a type in which a valve rod moves linearly according to opening and closing of a valve, and a piston shaft fitted in the cylinder and penetrating a wall surface of the cylinder. First of the cylinder bore divided into two by the piston and the piston that receives the pressure water supplied from the primary side of the valve device by the water conduit .
And the second chamber , the piston shaft passes through the second chamber of the cylinder bore and is constantly in contact with the valve rod of the valve device, and the piston or part of the piston shaft is A valve opening indicating device characterized by being visible. 2. The valve opening degree indicating device according to claim 1, wherein the second chamber of the cylinder bore is opened to the atmosphere through a communication path. 3. A second chamber of the cylinder bore is sealed.
The valve opening degree indicating device according to claim 1, wherein: 4. The valve opening indicating device according to claim 1, wherein the piston having a piston shaft has a display shaft, and the display shaft penetrates the cylinder and projects to the outside. 5. A second chamber having a cylinder axis as a display axis is in the atmosphere.
5. The valve opening degree indicating device according to claim 4, further comprising a communication path for opening to the .