JPH0490836A - Method and device for mass filling and mixing - Google Patents

Abstract

PURPOSE:To contrive a rapid and accurate filling irrespective of operating atmosphere by a method wherein the raw liq. from a plurality of raw liq. tanks is measured by a mass flowmeter, the raw liq. is fed at a point at which the measured value of each mass flowmeter is stabilized while it is being circulated to the raw liq. tank under control and the liquids are subsequently mixed and filled. CONSTITUTION:The pH value of each raw liq. to be treated is registered in a computer 22, a separate record card for the filled amt. of each raw liq. to be treated is set in a card reader 18 and a changeover switch 25 is switched to a plurality of filling positions. When a switch is turned on, the pH value of each raw liq. is fed from each pH meter 3 into the computer 22 to judge whether or not it is a proper raw liq. The filled amt. of each raw liq. is fed from the card reader 18 into the computer 22 to be displayed thereon. When a control valve 6 is released after confirmation of such amt., a circulation of each raw liq. is produced under control through a mass flowmeter 5, the control valve 6 and a three-way valve 7 to each raw liq. tank 1. Each raw liq. is sent into a static mixer 9 simultaneously with its flow set at a constant predetermined rate and by the switching of the three-way valve 7 and the time control of each two-way valve 8. The already filled container is recorded by a printer.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a mass-fill mixing method and apparatus using a mass flow meter.

b. Conventional Technology In food, cosmetics, medicine, chemical industry, and other fields, devices for filling and mixing liquid products are used. Currently, devices for filling a predetermined amount of liquid include a volumetric type that uses the volume of the liquid, a level type that uses the level inside the filled container, and an air pressure type that uses air pressure.
A gravimetric method that uses the weight of the fluid is generally used.

C1 Problems to be Solved by the Invention However, the method using the volumetric method has a drawback in that the liquid to be handled is affected by changes in various conditions such as temperature, viscosity, and pressure.

Furthermore, in the case of the level type or air pressure type, in addition to the changes in each of the conditions described above, there is also variation in the shape of the tare bag containing the liquid, making it difficult to fill an accurate amount.

Furthermore, even with the above-mentioned weight method, which is said to be relatively accurate, it is necessary to zero-correct the tare weight and take a stabilization time for this purpose, and the measurement is affected by vibrations, shocks, wind pressure, and other factors. There are drawbacks.

In addition, the above-mentioned methods are not necessarily suitable for cases such as water adhesion during washing, simultaneous mixing and filling of a plurality of raw materials, and filling and mixing of a wide variety of products in small quantities.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a mixing and filling method and apparatus that solve the above-mentioned problems.

d. Means for Solving the Problems In accordance with the above object, the present invention measures the stock solution flowing out from a plurality of stock solution tanks with a mass flow meter connected to each stock solution tank,
Based on this measured value, the control valves installed downstream of the mass flowmeters are controlled to control the flow rate of each mass flowmeter, and the stock solution is returned to the stock solution tank from the three-way valves installed downstream of the control valves. In advance, when the measured values of each of the mass flowmeters stabilized at a predetermined value, the three-way valves were switched to send the stock solution downstream, mix it, and fill it into a container, thereby solving the problem.

Further, the present invention provides a plurality of stock solution tanks, each of which is connected with a delivery pipe for the stock solution, and each of the delivery pipes is equipped with a PH needle, a mass flow meter, various control valves, and a mixer for mixing each measured stock solution. The above-mentioned problem was solved by providing a computer-controlled mass filling mixing device.

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

FIG. 1 is an explanatory diagram of the present invention when a plurality of stock solutions having different physical properties are measured and mixed in different amounts and filled.

Reference numeral 1 denotes a stock solution tank, which is composed of a plurality of stock solution tanks IA to IE, each of which stores a different stock solution A to E.

Pipes 2 for delivering the respective stock solutions are arranged downstream of each of the stock solution tanks J, and are each comprised of pipes 2A to 2E.

The following instruments are connected to each of the pipes 28 to 2E. (Additional notes A to H for each meter will be omitted below.) In other words, 3 is a PM meter, 5 is a mass flow meter,
6 is a control valve, 7 is a three-way valve, 8 is a two-way valve, 9 is a static mixer that collects each of the pipes 2A to 2E and is provided at its end; 10 is a container filled with the mixed liquid from the static mixer 9; 11 is! ! This is a conveyor that transports the placed filling container 10 to a predetermined position.

The three-way valve 7 is connected to a conduit 12 for refluxing the stock solution from each of the pipes 2A to 2E through the tank 12a for stock solution at the top.

The mass flowmeter 5 is a measuring device that measures mass, which is an absolute quantity, based on the following principle. In other words, the Coriolis force in physics and Newton's first law F(force)-m(
The basic principle is mass) x α (acceleration). Figure 2(a)
, (b) shows an example of the structure of a mass flowmeter, in which a pair of S-shaped pipes 101 and 102 are arranged at a predetermined interval, and two predetermined locations of both pipes 101 and 102 are excited by magnetic force. , the same [i[a+, Q>l. When a liquid of a certain mass (m) flows through the vibrating S-shaped pipe at a certain flow velocity (V), an acceleration (α) acts in a direction perpendicular to the direction of the flow. As a result, Coriolis force (Fc) is generated. This force is pipe 101.10
They are located upstream and downstream of 2 and are basically the same size but opposite in direction. Then, due to this Coriolis force (FO), a deflection phenomenon proportional to the mass flow I occurs in the S-shaped pipe 101, 102. By detecting the time difference in values (phase difference φ, see Figure 3), this is captured as a signal proportional to the mass flow rate, and this is output electrically.1
5 is a converter for that purpose.

The mass flowmeter 5 also includes a converter 15 and a preset counter 16. Card reader 1st, printer J9.
A computer 22 is connected in series. Reference numeral 17 denotes a flow rate indicator IJ4 meter, which is interposed between the control valve 6 and the converter 15. Reference numeral 25 denotes a changeover switch for single filling and multiple filling, which is connected to each two-way valve 14 of the pipe line 13 branched for mold filling and the two-way valve 8, and the other end is connected to the two-way valve 8. It is connected to the counter 16. Further, the P)I total 3 is connected to a computer 22.

The operation will be described below in the case of mixing and filling a plurality of stock solutions. First, prior to operation, the pH value of each stock solution to be processed is registered in the computer 22.

Further, a card is set in the card reader 18, which records the filling amount of each stock solution for each product to be processed.

In addition, the changeover switch 25 is switched to the multiple filling side.
.

By turning on the switch, first the PH of each stock solution (i is the PH
A total of 3 liquids are input into the computer 22 and it is determined whether or not they are appropriate stock solutions. If the stock solution is appropriate, the filling amount of each stock solution to be processed is input to the computer 22 from the card reader IB, and a display as shown in Table 1, for example, is displayed on the screen of the computer 22.

Table 1 Next, after the operator acknowledges this display content, the control valve 6
When the undiluted solution is opened, each stock solution passes through the respective mass flow meter 5, and further passes through the control valve 6 and the three-way valve 7, and the stock solution begins to be circulated to each stock solution tank by the pump 12a.

Here, a control valve is set so that each stock solution is sent to the static mixer 9 at the same time without being affected by the difference in piping resistance of each stock solution line or the difference in the filling amount of stock solution, and so that uniform mixing can be achieved here. Adjust the opening degree of 6. That is, the flow rate signal of the stock solution passing through the mass flow meter 5 is sent from the converter 15 to the control valve 6 via the flow rate indicator controller 17, the opening degree of the control valve 6 is controlled, and the specified constant flow rate is stabilized. After confirming that the
At the same time, the downstream side is opened and the stock solution is sent to the static mixer 9tll.

In this case, the two-way valve 8 is naturally opened. In this way, the delivery of the stock solutions to the static mixer 9 side is time-controlled for each stock solution, so that each stock solution is sent to the static mixer 9 at the same time.

In this way, each stock solution corresponding to the filling amount determined for each stock solution is collected in the static mixer 9, mixed, and filled into the container 10, which is filled with a mixed solution having the specifications shown in Table 1 above. The container is sent out as a product from the conveyor 11.

At the same time, the printer 19 prints out the filled amount of the product in the container, and this data is input into the computer 22 to create daily accounting policy data.

Further, the first filling liquid is not used because it is expected that air bubbles may be mixed in.

Note that it is also possible to prepare a predetermined stock solution using the powder by providing means for supplying the powder to the stock solution tank and a stirrer in the stock solution tank.

When selecting only one of the stock solutions A-H to fill the mold, switch the selector switch 25 to the mold filling side, keep the two-way valve 8 closed, and use the three-way valve instead. 14, and a response valve and mass flowmeter 5 connected to a specific stock solution tank 1 in the same manner as in the case of multiple filling.

In addition, if you do not use the recording card for the undiluted solution or if you use it together, turn on the preset counter 16.
You can enter the required data manually.

e. Effects of the Invention As described above, according to the mass filling mixing method and apparatus according to the present invention, changes in process conditions such as temperature and pressure on the liquid to be treated, and effects of physical properties such as the type of liquid and density viscosity can be avoided. The amount of filling can be measured instantaneously using mass, which is an absolute amount that is not affected by the amount of liquid, and can be mixed and filled continuously. Therefore, the filling process can be performed quickly and accurately regardless of the environment and atmosphere in which the device is installed and used.

In addition, it is possible to simultaneously mix and fill multiple liquid materials, etc., accurately by mass, without being affected by the weight or shape of the tare bag or container containing the liquid to be processed, reducing work time and increasing productivity. can be improved.

Also, the weaknesses of the weight method are vibration, shock, and wind pressure.

Since it is not affected by contact, there is no need to cancel or stabilize the weight of tares, containers, etc., and mixing and filling can be done in a short time. In particular, when filling by weight using a load cell, or when filling a small amount, the vibrations, shocks, etc.
Due to the disadvantages of wind pressure and contact, the turntable method has been used to cover the number of throughputs, but the device of the present invention allows filling in a short time, so even a straight line method that does not take up much space can fill a considerable number of times. Processing is possible.

Furthermore, since the device according to the present invention can set the filling amount in a wide range and arbitrarily, by pasting a bar code on the filling containers supplied on the conveyor that registers the filling amount suitable for each container, Automatically identifies various containers and filling amounts, allowing for random filling.

[Brief explanation of drawings]

Fig. 1 is a diagram explaining the configuration and operation of the mass filling device according to the present invention, Fig. 2 is a diagram explaining the principle of the mass flowmeter, and Fig. 3 is a phase difference depending on time of the sensor output provided in the mass flowmeter. FIG. l...Standard solution tank, 3...PH meter, 4.
...Control valve, 5.Mass flow meter, 6.Control valve, 7.
...Three-way valve, 8.14...Two-way valve, 9.
・Static mixer

Claims (1)

[Claims] 1) A mass flowmeter connected to each of the stock solution tanks measures the stock solution flowing out from a plurality of stock solution tanks, and controls a control valve provided downstream of each mass flowmeter based on the measured value. , while controlling the flow rate of each mass flowmeter, the stock solution is returned to the stock solution tank from a three-way valve provided downstream of this control valve, and when the measured value of each mass flowmeter stabilizes at a predetermined value. A mass filling mixing method characterized in that each of the three-way valves is switched to send the stock solution downstream, mix it, and fill it into a container. 2) A delivery pipe for the stock solution is connected to each of the plurality of stock solution tanks, and each delivery pipe is equipped with a PH meter, a mass flow meter, various control valves, and a mixer for mixing each measured stock solution. , a mass filling mixing device characterized in that these devices are controlled by a computer. 3) A control valve and a three-way valve are provided in series at the outlet of a mass flowmeter that measures the stock solution, and a control circuit for controlling the opening degree of this control valve is provided between this control valve and the mass flowmeter, and the 3. The mass filling mixing device according to claim 2, wherein the three-way valve is provided with a reflux line to the stock solution tank.