JPH02139391A - Liquid supply apparatus - Google Patents

Abstract

PURPOSE:To supply a large amount of liquid with a single control in a short time and with accuracy by providing a structure wherein a large valve part is energized away from a valve opening and closing piston and a working shaft, when moved to the side of the piston, pushes the large valve up. CONSTITUTION:As a valve opening and closing piston 23 of a control part 20 rises, a vertically movable shaft 26, a connecting body 43 and a working shaft 44 are moved upward. By some upward movement of this working shaft 44, a small valve part 48 is disengaged from the inner surface of a large valve part 52, whereby the liquid supplied from a supply hole 45 is carried out to the outside from the small valve through a water passing hole 53. Since, in this condition, the large valve part 52 is biased into close contact with a large valve hole 46 by the resiliency of a large valve opening and closing spring 56, there is no escape of the liquid from the large valve. Further upward movement of the working shaft 44 makes an intermediate projection 49 move upward against the resiliency of a valve opening and closing spring 30 and the aforesaid spring 56. The upward movement of the intermediate projection 49 makes a valve cylinder 50 move upward to disengage the large valve part 52 of the valve cylinder 50 from the large valve hole 46 to open the same and, therefore, the liquid flows out from the large valve as well as the small valve.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] Undeveloped IJI relates to a liquid supply device, and more particularly to a liquid supply device suitable for supplying a predetermined amount of liquid in a short period of time.

[Prior Art] Various valves have been conventionally provided as devices for supplying a predetermined amount of liquid.

In this way, the valve controls the passage of liquid by opening and closing the valve. Also, in such a valve,
Generally, a combination of the opening amount and opening time of the valve has been used as a means for controlling the supply of liquid.

On the other hand, among the various demands on valves, it is not possible to supply liquid to a predetermined large valve in an extremely short period of time.
There was a point.

Here, for example, the predetermined amount is 1. For example, when mixing various chemicals or compounds to create a mixture, even the amount of liquid dripping from a closed valve may be a problem.

Regarding time, for example, when mixing various chemicals or compounds in a large valve, if some of these chemicals or compounds contain volatile substances, even the supply time of the liquid may be was considered a problem.

In particular, when mixing a wide variety of fragrances to create a mixed fragrance, two requirements are required: extremely strict control of the supply amount and large-volume supply in a short period of time.

[Problems to be solved by the invention] However, with the valves that have been provided in the past, trying to control the supply amount extremely strictly requires a long supply time, and conversely, trying to shorten the supply time is difficult. This made it impossible to strictly control the supply amount.

It is also possible to combine a large-diameter valve and a small-diameter valve, supplying liquid up to a certain amount from the large-diameter valve, and use the small-diameter valve to precisely adjust the supply amount. In addition to being difficult to control the valves, liquid dripping from the large-diameter valves also caused irregularities in the supply.

Therefore, the present invention facilitates control by supplying liquid by a single control means, and provides a ceiling and a small valve that are opened and closed by a single control. It is an object of the present invention to provide a liquid supply device which can supply a liquid to a supply circuit in a short time and which can control the supply amount very precisely by adjusting the supply amount by opening only a small valve.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the invention according to claim 1 includes a control section and a valve section, the control section is provided with a valve opening/closing piston, and the valve section is provided with a valve opening/closing piston. The part is provided with a moving hole that communicates with the liquid supply hole, and in this moving hole, an operating shaft that is linked to the operation of the valve opening/closing piston, and a small valve section provided at the tip of the operating shaft,
A small valve part is installed inside, and the tip of the small valve part collides with the inner surface to form a small valve, and a tapered large valve part whose outer surface is a ceiling is provided. The valve opening/closing piston is biased toward the valve opening/closing piston side, and the operating shaft is formed so as to push up the ceiling when the operating shaft moves toward the valve opening/closing piston side.

In addition to the configuration of the invention as claimed in claim 1, the invention as claimed in claim 2 provides a ceiling stopping piston in the control section, and the valve opening/closing piston can only move by a length that does not open the ceiling due to movement of the operating shaft. It was created in such a way that it cannot be done.

[Operation] When the valve opening/closing piston of the control section moves upward, the operating shaft simultaneously moves upward.

During such movement of the working shaft, a small valve portion provided at the lower end of the working shaft is opened and liquid is supplied from the small valve while the working shaft is only slightly raised.

Further, as the operating shaft is subsequently raised, the large valve portion is opened, and liquid is supplied from the large valve from the ceiling.

Therefore, the small valve and the ceiling are sequentially opened only by movement of the operating shaft.

Further, when the valve is closed, when the five operating shafts are lowered, the ceiling is first closed, and then the operating shaft is further lowered, thereby closing the small valves.

In addition, the large valve part and the small valve part are formed on the same axis,
In addition, since the small valve part is formed inside the large valve part, even if liquid remains at the tip of the large valve part that is first closed, this liquid will fall off by the small valve part that is subsequently closed.
No dripping will occur after occlusion.

[Example] An embodiment of the present invention will be described below along with illustrated examples.

In the embodiment shown in the figure, the liquid supply device according to the present invention includes a control section 20 fixed to a base IO, and a valve section 40 that supplies liquid under the control of this control section 20.

The control unit 20 includes a valve opening/closing piston 23 which is moved by compressed air from a valve opening/closing boat 22 and a Tayu stop 1-piston which is moved by compressed air from a ceiling stop port 24 in a control body 21 fixed to a base 10. 25 is installed inside.

The valve opening/closing piston 23 is inserted into the control body with the lower moving shaft 26 protruding from the bottom of the control body 21 and the upper shaft 28 positioned in the communication hole 27 communicating with the Tayu stop piston 25 side. The valve opening/closing port 22 is inserted into the valve opening/closing piston hole 29 of 21.
It is moved by compressed air from Further, when compressed air is not supplied from the valve opening/closing boat 22, the valve opening/closing boat 22 is biased toward the valve portion 40 by the elastic force of the valve opening/closing spring 30 mounted in the control body 21.

The ceiling stop piston 25 is inserted into the ceiling stop piston hole 32 of the control body 21 with the lower shaft 31 positioned in the communication hole 27.
The inside is moved by compressed air from the Tayu stop boat 24. The control body 21 corresponding to the upper part of the ceiling stop piston hole 32 has a large stop piston stopper for regulating the upper limit position of the ceiling stop piston 25.
33 is the provision.

Further, the valve opening/closing piston hole 29 and the ceiling stop piston hole 32 of the control body 21 are provided with air escape holes 34 for the movement of the valve opening/closing piston 23 or the ceiling stopping piston 25.

The upper shaft 28 of the valve opening/closing piston 23 and the lower shaft 31 of the ceiling stopping piston 25 are such that the ceiling stopping piston 25 is positioned at the lowest end due to the supply of compressed air from the ceiling stopping port 24, and the valve opening/closing piston 23 is also located at the lowest end. The length is such that there is a slight gap between the lower end of the -1-shaft 28 of the valve opening/closing piston 23 and the upper end of the lower shaft 31 of the ceiling stop piston 25 when the valve opening/closing piston 23 is positioned at the lowest end due to the elastic force of the valve opening/closing spring 30. is formed.

In the valve section 40, an operating shaft 44 fixed to the L lower moving shaft 26 of the control section 20 by a connecting body 43 can freely move up and down in a moving hole 42 formed in a valve main body 41 fixed to the base 10. It is set up so that

The moving hole 42 is bored so that its axes coincide with the vertical driving wheel 26 and the operating shaft 44, and a supply hole 45 for supplying liquid into the moving hole 42 is communicated with the moving hole 42 in the middle thereof. Also, the action axis 4
The vertical movement shaft 26 side of this moving hole 42 from which the shaft 4 protrudes is sealed in a manner yL in which one working shaft 44 can freely move forward and backward. Further, a large valve hole 46 is bored on the opposite side of the operating shaft 44 to the 1-'F moving shaft 26.

The operating shaft 44 has a flange portion 47 circumferentially disposed in the middle thereof, and a tip portion thereof is formed as a small valve portion 48 having a tapered shape.

The operating shaft 44 also includes a vertical movement shaft 2 of the flange portion 47.
The flange portion 4 is connected to the 6 side by the large valve opening/closing spring 56.
The intermediate piece 49 biased towards the 7 side is a;J! You can wear it as loosely as you like. Further, a valve t350 that houses the flange portion 47 of the operating shaft 44 and the small valve portion 48 is fixed to the intermediate piece 49.

Here, the distance between the upper end of the flange portion 47 and the lower end of the intermediate piece 49 is such that the ceiling stop piston 25 is located at the lowest end due to the supply of compressed air from the ceiling stop port 24, and the valve opening/closing piston 23 also has a valve opening/closing spring. The upper shaft 2 of the valve opening/closing piston 23 when positioned at the lowest end due to the elastic force of 30
8 and the upper end of the lower shaft 31 of the ceiling stop piston 25, or is set to be slightly longer.

Further, the valve cylinder 50 is formed in a shape in which a large valve part 52 having a tapered cylindrical shape is connected to the tip of a cylindrical part 51, and the inside and outside of the cylindrical part 51 are connected to each other so that liquid can flow therethrough. A water passage hole 53 is provided for this purpose. Further, the large valve part 52 has its outer periphery in close contact with the large valve hole 46 formed in the valve main body 41 to form a ceiling, and the small valve part 48 at the tip of the operating shaft 44 is located inside the cylinder of the large valve part 52. are in close contact to form a small valve.

In addition, on the vertical movement shaft 26 side of the movement hole 42 of the valve body 41,
A shaft presser 54 is fixed for moving the operating shaft 44 forward and backward in a sealed state, and on the large valve hole 46 side of the moving hole 42, there is a shaft holder 54 for holding a gasket 60 that brings the large valve hole 46 and the large valve portion 52 into close contact. The seal presser 55 is fixed.

Furthermore, a large number of gaskets 60 are used in both the control section 20 and the valve section 40 for air sealing or liquid sealing.

Next, the operation of the liquid supply bag according to the embodiment shown in the figure will be explained.

Further, this operation description starts from the case where the control section 20 is in the state shown in the figure.

In this state, it is assumed that a predetermined liquid is supplied from the supply hole 45 of the valve portion 40, and the inside of the transfer hole 42 is filled with the liquid.

Also, at this time, the large valve part 52 is in close contact with the large valve hole 46 by the large valve opening/closing spring 56, and the small valve part 48 is in close contact with the inner surface of the large valve part 52 by the valve opening/closing spring 30.
The liquid inside the moving hole 42 will not leak to the outside.

If compressed air is sent to the valve opening/closing port 22 in this state,
The pressure of the compressed air causes the valve opening/closing piston 23 to rise against the elastic force of the valve opening/closing spring 30. Further, as the valve opening/closing piston 23 rises, the air above the valve opening/closing piston 23 in the valve opening/closing piston hole 29 exits from the relief hole 34 .

With such hFl of the valve opening/closing piston 23, the vertical driving wheel 26, the connecting body 43, and the operating shaft 44 rise.

At this time, the operating shaft 44 first rises slightly against the elastic force of the valve opening/closing spring 30.

This slight rise of the operating shaft 44 causes the small valve part 48 to separate from the inner surface of the large jt part 52, and the liquid supplied from the supply hole 45 flows out from the small valve through the water passage hole 53. . This situation again! In E.

Since the large valve portion 52 is brought into close contact with the large valve hole 46 by the elastic force of the large valve opening/closing spring 56, there is no outflow of liquid from the large pot.

When the working shaft 44 further rises, the flange portion 47 of the working shaft 44 eventually comes into contact with the intermediate piece 49. Therefore, the upper axis of the action shaft 44 after that resists the elastic force of the valve opening/closing spring 30 and the large valve opening/closing spring 56 and ascends the intermediate piece 49 as well. It will be necessary to do so.

When the intermediate frame 49 rises in this way, the intermediate frame 4
The valve cylinder 50 fixed at 9 will also rise. Valve cylinder 50
When the valve rises, the large valve part 52 of the valve cylinder 50 separates from the large valve hole 46, and the ceiling opens, so that not only the small valve but also
Liquid also leaks from the ceiling.

Note that when the valve opening/closing piston 23 rises in this manner, the upper shaft 28 also rises within the communication hole 27. On the other hand, since the bottom @31 of the ceiling stop piston 25 is located in the communication hole 27, the rising upper shaft 28 can rise until it collides with the lower shaft 31. That is, the valve opening/closing piston 23 is able to rise within a range until the upper shaft 28 collides with the lower shaft 31, allowing the liquid to flow out.

Further, the lifting distance of the valve opening/closing piston 23 can be adjusted by adjusting the ceiling stopping piston stopper 33 by moving the ceiling stopping piston stopper 33 forward or backward.

Furthermore, if compressed air is being fed from the Tayu stop port 24 at this time, the ceiling stop piston 25 will be lowered, and the lower @31 will also be lowered at the same time. When the lower shaft 31 is lowered F in this way, the lower shaft 31 and the upper shaft 28
Since the distance between the valve opening and closing piston 23 becomes narrower, the valve opening/closing piston 23 cannot rise, although slightly. Also at this time, the lower shaft 31
The distance between -L axis 28 is
If the distance between the valve and the intermediate piece 49 is made to match, or slightly shorter, when compressed air is fed into the large valve stop boat 24, only the small valve can be opened, and the ceiling cannot be opened. .

At this time, even if compressed air of the same pressure is supplied to the large stop boat 24 and the valve opening/closing port 22, the ceiling stopping piston is The downward force of the valve opening/closing piston 25 is greater than the upward force of the valve opening/closing piston 23. Therefore, when compressed air of the same pressure is fed into the large stop boat 24 and the valve opening/closing port 22, the upper shaft 28 will not rise further after the upper shaft 28 collides with the lower shaft 31.

Therefore, if compressed air is fed into the valve opening/closing port 22 while the compressed air is being fed into the ceiling stop port 24 in this way, only the small valve will be opened.

As mentioned above, if compressed air is sent to the valve opening/closing port 22 and the liquid is flowing out with not only the small valve but also the ceiling open, the amount of liquid flowing out will eventually reach a predetermined value. That will happen.

In this embodiment, compressed air is fed into the ceiling stop boat 24 just before the liquid level reaches a predetermined value. Then, the ceiling stop piston 25 descends, and the lower part 31 fixed to the ceiling stop piston 25 pushes down the upper shaft 28 of the valve opening/closing piston 23, which is rising.

When the upper shaft 28 is pushed down in this way, the vertical drive wheel 26
, the operating shaft 44 is held down via the connecting body 43. However, between the upper shaft 28 and the lower shaft 31, the ceiling stop piston 25 is located at the lowest end due to the supply of compressed air from the ceiling stop boat 24, and the valve opening/closing piston 23 is also located at the lowest end due to the force of one stroke of the valve opening/closing spring 30. The length is such that there is a slight gap between the lower end of the upper shaft 28 of the valve opening/closing piston 23 and the upper end of the lower shaft 31 of the ceiling stop piston 25 when the valve opening/closing piston 23 is located at the lower end. Therefore, when the valve opening/closing piston is pushed down by the ceiling stop piston 25, the large valve part 52 is closed by the descending operating shaft 44, but the small valve part 4
8 is still in an open state.

In this situation, the ceiling remains closed and only the small valve is open, allowing a small amount of liquid to flow out.

Then, the supply of compressed air to the valve opening/closing port 22 is stopped. Then, the elastic force of the valve opening/closing spring 30 causes the vertical driving wheel 2 to move.
6 is lowered, and the small valve part 48 comes into pressure contact with the inside of the large valve part 52, closing the small valve and completely stopping the outflow of liquid.

In addition, even if liquid remains in the form of drops inside the large valve part 52 when the large valve part 52 is closed, the remaining liquid drips due to the small valve part 48 being closed, and the liquid does not drip after that. It is.

In this embodiment, not only can the liquid from the large valve flow out in a short time by opening the ceiling, but also the amount of liquid flowing out can be adjusted by the amount of outflow from the small valve after the ceiling is closed. Therefore, strict control of the amount of liquid supplied can be performed.

Further, since the opening j'A control of the ceiling and the 74% valve can be performed only by vertical movement of the operating shaft 44, control is extremely easy.

Furthermore, in the above explanation, compressed air is supplied to the ceiling stop port 24 and the supply of compressed air to the valve opening/closing port 22 is cut off after a predetermined period of time has passed. After entering the valve, compressed air may be intermittently supplied to the valve opening/closing port 22 to cause a predetermined amount of liquid to flow out from the small valve. After compressed air is supplied to the stop boat 24, it is also possible to intermittently supply compressed air to the valve opening/closing port 22 to cause a predetermined amount of liquid to flow out from the small valve.

Furthermore, in the embodiment, the valve opening/closing piston hole 29 and the large jt stopping piston hole 32 of the control main body 21 are provided with air escape holes 34 for the movement of the valve opening/closing piston 23 or the ceiling stopping piston 25, respectively. Although it has been explained that the hole 34 is bored in one place, the valve opening/closing piston hole 29 is provided in one place.
It is also possible to communicate with the ceiling stopping piston hole 32.

Furthermore, in the embodiment, the ceiling stop port 24 and the valve opening/closing port 2
Even if compressed air of the same pressure is fed into the ceiling stop 1 piston 25, the downward force of the ceiling stop 1 piston 25 is greater than the downward force of the valve opening/closing piston 25 due to the partial pressure of the area of the vertical movement shaft 26 and the elastic force of the valve opening/closing spring 30. Although it has been explained that it is larger than the lifting force of Ichihi, if the vertical drive wheels 26 are made thicker, the downward force of the ceiling stop piston 25 becomes even stronger than the upward force of the valve opening/closing piston 23, and the large valve occlusion becomes incomplete. never become,
Of course, it is also possible to completely close the large valve by making the pressure supplied to the ceiling stop boat 24 higher than the pressure supplied to the valve opening/closing port 22.

Further, in the above embodiment, the distance between the upper end of the flange portion 47 and the lower end of the intermediate piece 49 is such that the large-angle stop piston 25 is located at the lowest end due to the supply of compressed air to the ceiling stop boat 24, and the valve opening/closing piston 23 is also the valve opening/closing spring 3
The distance is set to be equal to or slightly longer than the distance between the lower end of the upper shaft 28 of the valve opening/closing piston 23 and the upper end of the lower shaft 31 of the large-angle stop piston 25 when the valve opening/closing piston 23 is positioned at the lowest end with an elastic force of 0. For example, without providing the large-angle stop piston 25, it is possible to place boats for controlling the valve opening/closing piston 23 above and below the valve opening/closing piston hole 29. By controlling the supply of compressed air to the upper and lower boats, the operating shaft 4
This is because the movement of 4 can also be controlled.

[Effects of the Invention] As explained above, the present invention facilitates control by supplying liquid by a single control means,
A large valve and a small valve that open and close with a single control are provided, and by opening the large valve and small valve, the liquid from the large valve can be supplied in a short time, and the supply amount can be adjusted by opening only the small valve, making it extremely This allows for strict control of the supply amount.

[Brief explanation of the drawing]

The drawing is a sectional view showing an embodiment of the present invention. 10...Base 20...Control unit 21...
・Control body 22... Valve opening/closing boat 23...
Valve opening/closing piston 24...Ceiling stop boat 25...
Large angle stop piston 26... Vertical driving wheel 27... Communication hole 28...
・Upper shaft 29...Valve opening/closing piston hole 30・
... Valve opening/closing spring 31 ... Lower shaft 32 ... Ceiling stop piston hole 33 ... Large angle stop piston stow/par 34 ... Relief hole 40 ... Valve part 41 ... Valve part body
42...Movement hole 43...Connection body 44
...Action shaft 45...Supply hole 46...Large valve hole 48...Small valve part 50...Valve cylinder 52...Large valve part 54...Shaft retainer 47...Flange part 49...Intermediate piece 5z...Cylinder part 53...Water hole 55...Packing holder 56...Large valve opening/closing spring 60...Packing \

Claims (1)

[Scope of Claims] 1. Formed of a control part and a valve part, the control part is provided with a valve opening/closing piston, the valve part is provided with a moving hole communicating with a liquid supply hole, and in this moving hole, A working shaft linked to the operation of the valve opening/closing piston, a small valve part provided at the tip of this working shaft, and a small valve part internally,
and a small valve portion at the tip abuts against the inner surface to form a small valve, and a tapered large valve portion whose outer surface is a large valve, biasing the large valve portion toward the side opposite to the valve opening/closing piston, A liquid supply device characterized in that the operating shaft is formed so as to push up the large valve when the operating shaft moves toward the valve opening/closing piston. 2. The liquid supply device according to claim 1, wherein the control section is provided with a large valve stop piston, and the valve opening/closing piston is formed so that it can only move by a length that does not open the large valve due to movement of the operating shaft.