JPS5813365Y2 - Liquid suction automatic control device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic liquid suction control device suitable for uniformizing the level of liquid filled in a container such as a pin and for removing liquid from the container.

Conventionally, when filling a fixed amount of liquid into a large number of containers, one has to either keep the filling amount per unit time constant and regulate the filling time, or reduce the amount of liquid injected a little before reaching a certain amount. The liquid level was injected one at a time, and the liquid level was detected using a special liquid level detection means such as a photoelectric device, and the amount was controlled at a constant level.

However, such a filling method has disadvantages in that the amount of liquid filled becomes uneven and that filling takes time.

In addition, with this method, if for some reason you fill in too much liquid, or if it becomes necessary to drain the filled liquid out of the container, you can lower the liquid level or drain it out of the container without requiring human intervention. It has the disadvantage that it cannot be discharged and is time consuming.

An object of the present invention is to provide an automatic liquid suction control device that can very easily adjust the level and discharge the liquid to the outside of the container when filling the container.

Hereinafter, specific examples of the present invention will be explained in detail with reference to the drawings.

In the figure, 1 is a container pre-filled with liquid, 2 is a liquid suction automatic control device which is a main part of the present invention, 3 is a vacuum tank for storing the sucked liquid and keeping the suction pressure constant; 4 is a vacuum pump for suctioning.

The automatic liquid suction control device 2 includes a liquid suction pipe 5 and a liquid level detection vibro, the lower portions of both pipes 5 and 6 are both inserted into the container 1, and a suction port 6 of the liquid level detection vibro.
a is installed to match the liquid level to be detected, and accordingly, the suction port 5a of the liquid suction pipe 5 is installed at the same liquid level or lower.

In addition to these pipes 5.6, the liquid suction automatic control device 2 includes a liquid level detection/valve driving device 7, a valve device 8 driven by this device 7, and a starting valve device 9 for starting this device 7. It is configured with.

The liquid level detection/valve driving device 7 has a case 10 partitioned by a diaphragm 11 into an atmospheric pressure chamber 12 and a container communication chamber 13.

The atmospheric pressure chamber 12 has an atmospheric communication hole 14 formed in the case 10.
The diaphragm 11 is communicated with the outside so that atmospheric pressure acts on one surface of the diaphragm 11.

The upper end side of the liquid level detection vibro is inserted into the container communication chamber 13 through the case 10 in an airtight manner.

There is an orifice 1 in the liquid level detection vibro in the container communication chamber 13.
5 is formed.

The valve device 8 includes a cylindrical case 16 that is integrated with a case 10, and the inside of the case 16 is partitioned by three seals 17, 18, and 19 into two valve chambers, namely, a container communication valve chamber 20 and a tank communication valve chamber 21. is formed.

The seal 17 partitions the tank communication valve chamber 21 and the container communication chamber 13 of the liquid level detection/valve driving device 7, the seal 18 partitions the adjacent valve chambers 20 and 21, and the seal 19
partitions between the valve chamber 20 and the outside.

A rod-shaped valve body 22 is provided that slides through the centers of these three seals 17, 18, and 19, and one end of this valve body 22 is fixed to the diaphragm 11.
It is designed to be driven by the movement of the

The center of the valve body 22 is a communicating portion 23 having a smaller diameter than other portions.

A spring receiver 24 is fixed to the other end of the case 16, and a spring 25 is interposed between the spring receiver 24 and the end of the valve body 22.

The upper end of the liquid suction pipe 5 passes through the case 16 in an airtight manner and is connected to the container communication valve chamber 20 .

The tank communication valve chamber 21 is connected to the decompression tank 3 through a pipe 26 .

The container communication chamber 13 of the liquid level detection/valve driving device 7 and the decompression tank 3 are also connected through a pipe 27, and the starting valve device 9 is connected in the middle of the pipe 27.

When pilot air is supplied through the pipe 28, the starting valve device 9 is pushed by the pressure to connect the piping 27, and when the pilot air is no longer supplied, it is pushed by the pressure 29.
It is formed as a two-way valve that returns to its original position and closes the pipe 27.

Next, the operation of adjusting the liquid level in the container 1 to a predetermined level using the automatic liquid suction control device 2 will be described.

The container 1 is filled with liquid to a predetermined level or higher in advance.

In addition, the suction port 6a of the liquid level detection vibro is matched with the liquid level of the container 1 to be set, and the suction port 6a of the liquid suction pipe 5 is
A is installed below that liquid level.

In this state, when pilot air is supplied to the starter valve device 9 for about one second, the pipe 27 is opened and the container communication chamber 13 of the liquid level detection/valve drive device 7 is communicated with the decompression tank 3 .

Since the pressure reduction tank 3 has been previously reduced to a predetermined pressure by the vacuum pump 4, the container communication chamber 1 of the liquid level detection/valve drive device 7
3 is depressurized below atmospheric pressure.

As a result, the pressure balance between the atmospheric pressure chamber 12 and the container communication chamber 13 is disrupted, and when the resulting downward force becomes greater than the force urged upward by the spring 25, the diaphragm 11 is stretched toward the container communication chamber 13. put out.

Due to the pressure drop in the container communication chamber 13, some of the liquid in the container 1 is sucked up into the container communication chamber 13 via the liquid level detection vibro.

This liquid passes through an orifice 15 provided in the liquid level detection vibro while the starter valve device 9 is open.

Due to the flow resistance generated at this time, the amount of liquid flowing into the container communication chamber 13 is extremely small, which prevents the pressure within the container communication chamber 13 from increasing even when the starter valve device 9 is closed.

A portion of the liquid that has flowed into the container communication chamber 13 is transferred to the starting valve device 9.
While it is open, the water is discharged to the vacuum tank 3 via the pipe 27.

When the diaphragm 11 extends toward the container communication chamber 13, the valve body 22 of the valve device 8 is driven, and the communication portion 2 of the valve body 22 is driven.
3 is moved to the location of the seal 18, so that the container communication valve chamber 20 and the tank communication valve chamber 21 are communicated, and the container 1 is communicated with the reduced pressure tank 3.

As a result, the liquid in the container 1 is sucked up by the liquid suction pipe 5 and discharged into the decompression tank 3 via the valve device 8, and the liquid level in the container 1 gradually decreases.

After about one second, the starting valve device 9 is closed, and the container communication chamber 13 of the liquid level detection/valve driving device 7 is cut off from the pressure reducing tank 3.

After that, the liquid level in the container 1 is determined by the suction port 6a of the liquid level detection vibro.
When it matches, the vibro starts sucking air, and the container communication chamber 13 of the liquid level detection/valve driving device 7 is communicated with the atmosphere.

Therefore, the pressure in the container communication chamber 13 rises to atmospheric pressure.

Since the starting valve device 9 is closed at this time, the container communication chamber 13 is not depressurized by the decompression tank 3.

When the container communication chamber 13 reaches atmospheric pressure, the spring 25 pushes the valve body 22
is pushed up, the communication part 23 moves to the tank communication valve chamber 21 side, the space between the container communication valve chamber 21 and the tank communication valve chamber 21 is closed, and the suction of liquid is stopped.

Therefore, the liquid level in the container 1 is set at a predetermined level.

The work of adjusting the liquid level to a predetermined level in this way can be done in a short time without the need for careful attention by the automatic liquid suction control device 2.

In addition, according to such a liquid suction automatic control device 2,
It is possible to draw out a certain amount of liquid from the container 1 or all of it.

As explained above, the liquid suction automatic control device of the present invention makes it much easier to match the liquid level in a container to a predetermined level compared to the conventional method of matching the liquid level to a predetermined level by pouring liquid. This can be done in a short time and without the need for caution, and furthermore, by appropriately positioning the liquid suction pipe and the liquid level detection pipe, all the liquid after injection can be discharged out of the container.

In addition, the present invention provides a method for quickly and reliably sucking out liquids by using the automatic liquid sucking control device as many times as the capacity of the containers when it is necessary to simultaneously discharge liquids filled in a large number of containers. If one of the containers completes the suction operation first, the automatic liquid suction control device connected to that container will automatically operate and close the space between the container communication valve chamber and the tank communication valve chamber, thereby wasting the atmosphere. is not sucked into the vacuum tank, improving work efficiency.

In addition, this method of sucking up the liquid and adjusting it to a predetermined level eliminates the need for a special liquid level detection device using a photoelectric device, etc., and the liquid level can be detected simply with a pipe, which is very practical. It is beneficial for

[Brief explanation of the drawing]

The drawing is a sectional view showing an example of the automatic liquid suction control device according to the present invention in a state of use. 1... Container, 2... Liquid suction automatic control device, 3... Decompression tank, 4... Vacuum pump, 5... Liquid Suction pipe, 6...
...Liquid level detection pipe, 5a. 6a...Suction port, 7...Liquid level detection and valve drive device, 8...Valve device, 9...Start valve device, 10... ...Case, 11...Diaphragm, 12...Atmospheric pressure chamber, 13...
・Container communication chamber, 14... Atmosphere communication hole, 15...
... Orifice, 16 ... Case, 17,
18, 19... Seal, 20... Container communication valve chamber, 21... Tasik communication valve chamber, 22...
... Valve body, 23 ... Communication part, 25 ...
...splash.

Claims (1)

[Scope of utility model registration request] a liquid level detection pipe whose lower part is inserted into the container with the suction port aligned with a predetermined level in the container filled with liquid;
A liquid suction pipe whose lower part is inserted into the container so that the suction port is located below the position of the suction port of the liquid level detection pipe, and an atmospheric pressure chamber and a container communication chamber in the case are separated by a diaphragm. a liquid level detection and valve driving device in which the atmospheric pressure chamber is communicated with the outside and the container communication chamber is connected in communication with the container through the liquid level detection pipe; and a liquid level detection and valve driving device which is connected in communication with the container through the liquid suction pipe. A valve device is configured such that a container communication valve chamber and a tank communication valve chamber connected to a pressure reducing tank are communicated with each other by a valve body driven by the diaphragm, and the communication is interrupted by a valve body driven by the diaphragm. 1. A liquid suction automatic control device comprising: a starting valve device that connects a container communication chamber of a position detection/valve drive device with the decompression tank to reduce pressure in the container communication chamber.