JPH08285658A - Quantitative extracting device - Google Patents

Abstract

PURPOSE: To provide a quantitative extracting device, by which a fixed quantity can be extracted, regardless of the properties of a liquid such as the specific gravity, viscosity and so on, the temperature and the storage quantity. CONSTITUTION: A control device 38 first closes a valve 36-1 and opens a valve 36-1 to force a liquid 32 to flow from a storage tank 31 into an intermediate receptacle 42, and then closes the valve 36-1 and opens the valve 36-2 to extract a fixed quantity of a liquid 32 filled in the intermediate receptacle 42. The temperature of the liquid 32 is kept uniform by a temperature control device 35 disposed in the periphery of the storage tank 31 and an agitator 39 disposed at the bottom in the storage tank 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quantitative dispensing device capable of accurately dispensing a fixed quantity of any liquid having different properties.

[0002]

2. Description of the Related Art FIG. 2 is a schematic configuration diagram showing a first configuration example of a conventional liquid quantitative dispensing device. In FIG. 2, the liquid 2 is stored in the tank 1. At the bottom of the tank 1, the central portion is inclined downward to form a spout 3, and the liquid 2 is spouted into the container 4 from the tip 3a. A flow meter 5 and a valve 6 are attached to the spout 3 from the tank 1 to the tip 3a. The measurement results of the flow meter 5 are integrated by the integrator 7, and the integration result of the integrator 7 is input to the controller 8. Further, the valve 6 is a controller 8
It is opened and closed by a motor (not shown) whose rotation is controlled by.

When the controller 8 receives the fixed amount dispensing instruction, the motor opens the valve 6 to start the dispensing of the liquid 2.
The flow meter 5 measures the flow rate of the liquid 2 at this time, and the integrator 7 integrates the flow rate of the liquid 2 (flow rate per hour) measured by the flow meter 5. The controller 8 closes the valve 6 by the motor when the flow rate of the liquid 2 integrated by the integrator 7 reaches a predetermined amount. As a result, a fixed amount of liquid
Is poured out.

FIG. 3 is a schematic configuration diagram showing a second configuration example of a conventional fixed-volume dispensing device. In FIG. 3, the spout 3
A weight sensor 9 is installed immediately below the tip 3a of the container 3 and the container 4 is placed thereon. The signal of the weight sensor 9 is input to the weight measuring device 10, and the measurement result of the weight measuring device 10 is input to the controller 8. In the example shown in FIG. 3, the specific gravity of the liquid 2 in the tank 1 is measured in advance, and the weight at a fixed amount (liquid amount) is obtained.

When the controller 8 receives the quantitative dispensing instruction, the motor opens the valve 6 by the motor. The weighing machine 10 is a container 4
The weight of the liquid 2 poured into the inside is measured, and when this weight reaches a predetermined amount, the controller 8 closes the valve 6 by the motor. As a result, a fixed amount of the liquid 2 is poured into the container 4.

FIG. 4 is a schematic configuration diagram showing a third configuration example of a conventional quantitative dispensing device. In the example shown in FIG. 4, the flow rate of the liquid 2 poured out from the tip 3a of the spout 3 per unit time is measured in advance. Also, the time required for quantitative dispensing is obtained from the flow rate per unit time. The controller 8 opens the valve 6 by the motor when receiving the quantitative dispensing instruction. After that, the controller 8 measures the time after the valve 6 is opened by the timer 11, and when the time calculated in advance is reached, the valve 6 is closed by the motor. As a result, a fixed amount of the liquid 2 is poured into the container 4.

[0007]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the case of soup or oil, the flow velocity of the liquid 2 passing through the valve 6 changes depending on the amount of the liquid 2 stored in the tank 1, and the specific gravity and the viscosity change depending on the temperature of the liquid 2. Therefore, the conventional method described above has a problem that it is difficult to accurately dispense a fixed amount. Further, when the liquid 2 stored in the tank 1 was replaced with another liquid having a different property, there was a problem that the specific gravity and the time required for pouring had to be measured again. Further, in the case where the liquid 2 contains a fixed substance such as powder or granules, the conventional fixed-volume dispensing device cannot handle it. The present invention has been made under such a background, and provides a constant-volume dispensing device capable of dispensing a fixed amount regardless of properties such as specific gravity and viscosity of liquid, temperature and storage amount. It is an object.

[0008]

In order to solve the above-mentioned problems, in the invention according to claim 1, a storage tank for storing a liquid and a first tank provided at the bottom of the storage tank are provided. A valve, a metering container attached to the lower part of the first valve, and a second container provided on the bottom of the metering container.
And a valve.

According to the second aspect of the invention,
A storage tank for storing a liquid, a first valve provided at the bottom of the storage tank, a metering container attached to the lower part of the first valve, and a second valve provided at the bottom of the metering container. A valve and control means for controlling the open / closed state of the first and second valves, wherein the control means opens the first valve to fill the metering container with the liquid, and The second valve is opened after closing the valve.

Further, in the invention described in claim 3,
The quantitative dispensing apparatus according to claim 1 or 2, further comprising: temperature control means provided around the storage tank, and stirring means provided at least at a bottom portion of the storage tank. It is characterized by

[0011]

According to the present invention, the control means first causes the liquid to flow from the storage tank into the metering container by closing the second valve and opening the first valve, and then closing the first valve. By opening the second valve, the fixed amount of liquid filled in the fixed amount container is poured out. Further, the temperature of the liquid is kept uniform by the temperature control means provided around the storage tank and the stirring means provided at the bottom or the like in the storage tank.

[0012]

EXAMPLES Examples of the present invention will be described below.
FIG. 1 is a schematic configuration diagram showing the configuration of a constant volume dispensing device 30 according to an embodiment of the present invention. A. Configuration The configuration of this embodiment will be described below. 31 in FIG.
Is a storage tank, and the liquid 32 is stored in the storage tank 31.
Are stored. In the present embodiment, an example will be described in which a liquid having a high viscosity such as soup is stored in the tank 31 as the liquid 32 and is applied to a device that dispenses a fixed amount of the liquid 32.

A temperature controller 35 is attached around the storage tank 31 so as to surround it. The temperature controller 35 heats or cools the liquid 32 stored in the storage tank 31, but in the present embodiment, one having a built-in heating wire heater is used as an example. An appropriately adjusted current is supplied to the temperature controller 35 under the control of a controller 38, which will be described later, to keep the liquid 32 at an appropriate temperature.

Reference numeral 37 denotes a temperature sensor such as a thermistor attached to the bottom of the storage tank 31. The signal from this temperature sensor is input to the controller 38. Controller 38
Controls the current flowing through the heating wire heater built in the temperature controller 35 based on the temperature of the liquid 32 measured by the temperature sensor 37 to keep the temperature of the liquid 32 constant at all times.

Reference numeral 39 denotes an agitator such as a propeller attached to the bottom of the storage tank 31, which is rotationally driven by a motor or the like (not shown) to agitate the liquid 32. 40 is
It is also a water level sensor attached to the bottom of the storage tank 31. In the water level sensor 40 of this embodiment, the electrical contact is turned on when the float having buoyancy with respect to the liquid 32 descends. The water level signal detected by the water level sensor 40 is input to the controller 38. The water level sensor 40 is mounted in the storage tank 31 at substantially the same height as the stirrer 39.

The bottom portion of the storage tank 31 described above has a central portion inclined downward, and a valve 36-1 is provided at the central portion.
Is attached. In the valve 36-1 of this embodiment,
A ball valve is used, and the valve 36-1 has a structure opened and closed by a motor 41-1. The motor 41-1 is rotated / stopped and its rotation direction is controlled by the controller 38. An intermediate container 42, which will be described later, is attached to the lower portion of the valve 36-1.
A valve 36-2, which is similar to the valve 36-1, is attached to the bottom of 2. This valve 36-1 is also opened and closed by the motor 41-2 controlled by the controller 38.

The intermediate container 42 has, for example, a cylindrical shape, and when both the valve 36-1 and the valve 36-2 are closed, the volume in the intermediate container 42 during this period becomes a predetermined fixed amount. Has been formed. A spout 33 is formed below the valve 36-2, from which the liquid 32 is spouted into the container 34.

B. Operation The operation of this embodiment will be described below. The controller 38 constantly controls the current flowing through the heating wire heater built in the temperature controller 35 so that the temperature of the liquid 32 measured by the temperature sensor 37 becomes a preset predetermined temperature. At the same time, the stirrer 39 is rotationally driven by a motor (not shown) or the like to stir the liquid 32 in the storage tank 31. Therefore, the liquid 32 in the storage tank 31
Has a uniform temperature, specific gravity or viscosity.

When the controller 38 receives an instruction to dispense a fixed amount, first, the motor 36-1 is rotated and the valve 36-1 is opened while the valve 36-2 is closed. As a result, the liquid 32 stored in the storage tank 31 gradually flows into the intermediate container 42. The controller 38 rotates the motor 41-1 and closes the valve 36-1 when a predetermined time set in advance has elapsed after opening the valve 36-1. The time for opening the valve 36-1 varies depending on the property of the liquid 32 stored in the storage tank 31. Therefore, the time required from when the valve 36-1 is opened until the inside of the intermediate container 42 is filled with the liquid 32 is measured in advance, and a time with a sufficient margin is set.

Next, the controller 38 opens the valve 36-2 by rotating the motor 41-2 while keeping the valve 36-1 closed. As a result, the liquid 32 in the intermediate container 42 is poured into the container 34 from the spout 33. As described above, the intermediate container 42 is once filled with the liquid 32.
The capacity in 2 is a predetermined fixed amount. Therefore, a fixed amount of the liquid 32 is poured into the container 34.

After the valve 36-2 is opened, the controller 38 rotates the motor 41-2 in the direction opposite to the conventional direction and closes the valve 36-2 after a predetermined time has elapsed. This time for opening the valve 36-2 is the same as the above-mentioned valve 3
Since it is the same as the opening time of 6-1, the description is omitted.

When the liquid level of the liquid 32 in the storage tank 31 drops below the position of the water level sensor 40, the stirrer 39 idles and the temperature controller 35 becomes difficult to control (for example, the heating wire). It is heated by the heater and becomes extremely hot. Furthermore, the liquid 32 flowing into the intermediate container 42
Since the pressure of No. 2 decreases, the flow velocity decreases, and it becomes impossible to fill the inside of the intermediate container 42 with the liquid 32 within a predetermined time. Therefore, the controller 38 stops the normal quantitative dispensing process when the electrical contact of the water level sensor 40 is turned on. In addition, a warning device using light or sound (not shown) notifies the lowering of the water level and prompts the replenishment of the liquid 32 into the storage tank 31.

In this way, a fixed amount of the liquid 32 is easily poured into the container 34. Further, even when the liquid 32 contains a solid substance such as a powder or a granular body, or even when the liquid has a large specific gravity or a great change in temperature, it is possible to accurately dispense a fixed amount.

The intermediate container 42 of this embodiment has been described by taking a cylindrical shape as an example, but the shape is not limited to this and may be, for example, a prismatic shape. Further, as the intermediate container 42, one that is formed of two tubular bodies that are partially overlapped with each other and that is slidable, and that the total length is variable, or part or all have a bellows structure. If the one with a variable horizontal cross-sectional area is used, it becomes a structure that makes it possible to change the pouring amount very easily. In this case, a variable resistor that slides simultaneously with a part of the intermediate container 42 is attached, and the controller 38 should open the valve 36-1 or the valve 36-2 described above based on the resistance value of the variable resistor. It is also possible to determine the time.

The temperature controller 35 of the present embodiment has shown an example of the constitution in which the liquid 32 is only heated by the heating wire heater, but has a thin pipe, for example, and has a structure in which hot water or cold water is made to flow appropriately. Then, the temperature of the liquid 32 can be effectively controlled. Also, storage tank 3
The structure may be such that a stirrer is also provided in the upper part of the inside of 1, to effectively stir the liquid 32 and make its temperature uniform.

[0026]

As described above, according to the present invention, the control means first closes the second valve and opens the first valve to cause the liquid to flow from the storage tank into the fixed quantity container, Then, by closing the first valve and opening the second valve, the fixed amount of liquid filled in the fixed amount container is poured out. In addition, since the temperature of the liquid is kept uniform by the temperature control means provided around the storage tank and the stirring means provided at the bottom of the storage tank, the properties such as the specific gravity and viscosity of the liquid, the temperature and the storage It is possible to obtain an effect that it is possible to realize a fixed-quantity dispensing device capable of dispensing a fixed amount regardless of the amount.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a first configuration example of a conventional quantitative dispensing device.

FIG. 3 is a schematic configuration diagram showing a second configuration example of a conventional quantitative dispensing device.

FIG. 4 is a schematic configuration diagram showing a third configuration example of a conventional quantitative dispensing device.

[Explanation of symbols]

 30 quantitative dispensing device 31 storage tank 32 liquid 33 spout 34 container 35 temperature controller 36-1, 36-2 valve 37 temperature sensor 38 controller 39 stirrer 40 water level sensor 41-1, 41-2 motor 42 intermediate container

Claims (3)

[Claims] 1. A storage tank for storing a liquid, a first valve provided at the bottom of the storage tank, a metering container attached to the lower part of the first valve, and a bottom part of the metering container. And a second valve provided therein. 2. A storage tank for storing a liquid, a first valve provided at the bottom of the storage tank, a metering container attached to the lower portion of the first valve, and a bottom part of the metering container. And a control means for controlling the open / closed state of the first and second valves, wherein the control means opens the first valve and fills the fixed quantity container with the liquid. A fixed-volume dispensing device characterized in that the second valve is opened after the first valve is closed. 3. The temperature control means provided around the storage tank, and the stirring means provided at least at the bottom of the storage tank. The quantitative dispensing device described in Crab.