JPH06226069A - Automatic metering and compounding device - Google Patents

Abstract

PURPOSE:To greatly improve treatment efficiency by constituting the above device in such a manner that processes for mixing plural kinds of liquids can simultaneously and parallel be executed and to reduce running costs by arranging storage tanks for the liquids to be mixed higher than the liquid level of a compounding tank. CONSTITUTION:Electronic metering instruments 21 to 2L are disposed into the plural storage tanks 11 to 1L for housing the liquids to be mixed respectively. On the other hand, the compounding tank 3 to mix various kinds of the fluids sent from the respective storage tanks is installed in the position of the liquid level lower than the liquid levels in the respective storage tanks. Liquid feed pipes 41 to 4L for feeding the liquids at liquid level differences are disposed between the respective storage tanks and the compounding tank 3. The opening and closing of these control valves are controlled by comparing the present value signals of the weights of the respective liquids outputted from the electronic metering instruments 21 to 2L and the desired compounding values of the respective liquids which are previously set by a controller 6. Consequently, plural kinds of the liquids are automatically and exactly taken out and are compounded at a high speed. In addition, the running costs are reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic metering and dispensing apparatus for liquids capable of automatically extracting a predetermined amount of a plurality of kinds of liquids and preparing the liquids. It is a new device that can be mixed.

[0002]

2. Description of the Related Art Recently, as a technique for measuring and extracting a plurality of types of liquids, a "quantity extracting method for liquids" described in JP-A-4-76422 has been proposed. This liquid metering-out technology measures the amount of liquid taken out from a container that holds the liquid as a change in weight with an electronic meter,
While automatically repeating the opening / closing operation of the valve based on the measured value, the amount of change in the weight of the liquid in the container is taken out to a certain ratio of the target value as a step, and by repeating this step, the target is gradually changed. It is said that there is a merit that when a plurality of types of liquids are taken out and mixed, the mixing ratio can be arbitrarily changed and accurate measurement can be performed.

Considering the case where three kinds of liquids are weighed and mixed according to the above conventional technique, first, the first liquid w ₁ is weighed by a designated amount K _{1 and} stored in a container. In this case, the measurement of the designated value K ₁ is detected by the measuring instrument based on the weight P of the empty container. Next, the second liquid w ₂ is weighed by the designated amount K ₂ and filled in the container. The designated value K _{2 in} this case is measured by using (P + K ₁ ) as an initial value. Finally, the third liquid is weighed by the designated amount K ₃ and added to the container to finish the weighing.

However, assuming that the time required for measuring the liquids w ₁ , w ₂ , w ₃ is T ₁ , T ₂ , T ₃ , respectively, the time required for taking out and measuring these three types of liquids is T = It becomes T ₁ + T ₂ + T ₃ .

However, in this conventional technique, in order to ensure the measurement accuracy, a measurement process of a plurality of steps, for example, two steps, is taken for taking out each liquid. That is, for a specified amount K _i , first, the 95% liquid amount K ′ _i is measured, the valve opening time t _i is calculated from the required time t _ia based on the calculation formula shown in the formula, and the remaining amount (K _i The measurement of −K ′ _i ) is controlled by the valve opening time t _i . t _i = {(K _i −K ′ _i ) / K _i } × {95/100} × t _ia (i = 1 to 3)

Further, according to the above-mentioned conventional technique, even after the valve is opened / closed, the residual liquid adhering to the inside of the liquid drops from the pouring port of the liquid delivery pipe even after the valve is opened / closed. Dripping occurs. This dripping is a residual liquid drop amount per opening / closing (ΔK). Then, in this case, the residual liquid drop amount (ΔK) is determined by the relationship between the time lag of opening and closing the valve, the volume of the pipe from the valve, the liquid dripping time due to the liquid viscosity and the measuring time width.

Therefore, in the above conventional method,
The measurement accuracy must be restricted by the residual liquid drop amount (ΔK), and in order to ensure the predetermined measurement accuracy, the valve opening / closing control must be performed in multiple steps for measuring one type of liquid. I had to do it.

Further, when the residual liquid drop, which is (ΔK) in step opening / closing, that is, the complete ending time of the liquid drop is (Δt), a valve opening / closing operation interval (waiting time) of (Δt) per time is required. It will be.

For these reasons, the above-mentioned conventional "liquid quantitative extraction method" has a great merit that the mixing ratio can be arbitrarily changed when plural kinds of liquids are extracted and mixed, and moreover, accurate measurement can be performed. However, there was still a problem to be solved in terms of dripping.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the conventional technique of dispensing a plurality of types of liquids in fixed amounts and mixing them. A technical problem is to provide a practical new device that can be accurately and quickly taken out and compounded.

Further, another technical problem of the present invention is that the consumption amount of liquid feeding energy is small, a plurality of kinds of liquids can be prepared in an energy saving manner, and economical operation is possible at a low running cost. Another object of the present invention is to provide a liquid automatic metering and blending device.

Further, another technical problem of the present invention is that the amount of liquid to be sent to the blending tank is not disturbed by the dripping due to the residual liquid, and each amount of liquid is measured with high accuracy for blending. An object of the present invention is to provide a highly accurate automatic liquid metering and blending device.

[0013]

Means adopted for solving the technical problems Means adopted by the inventor for solving the above technical problems will be described with reference to the accompanying drawings.

That is, according to the present invention, plural kinds of liquids W ₁ · W
₂ ... Multiple storage tanks containing W _n separately 1 ₁ 1 ₂ ...
.. 1 _n ; and a plurality of electronic scales 2 ₁ , 2 _2, ... 2 _n for measuring the weight of each liquid stored in these storage tanks and outputting the current weight value signal of each liquid; than said respective reservoir and the preparation tank 3 disposed at the position of the low liquid level; disposed between the preparation tank 3 and the reservoir ₁ 1 · 1 ₂ ···· 1 _n of the each two A plurality of liquid feed pipes 4 ₁ , 4 _2, ... 4 _n that enable the liquid to move from each storage tank to the mixing tank due to the difference in the liquid level of the tanks; A plurality of control valves 5 ₁ , 5 _2, ..., 5 _n for controlling the opening and closing of liquid movement from the storage tank to the mixing tank
Receiving the current value signal of the weight of each liquid output from each electronic measuring device, calculating and measuring the liquid feed amount of each liquid to the mixing tank, and instructing each of the control valves based on the measured value. The point is that the controller 6 that sends signals is organically linked and integrated, and by integrating these technical means, various kinds of required liquids are stored in the storage tanks 1 ₁ 1 ₂ ...
.. An automatic metering and dispensing device for liquids that can accurately take out appropriate amounts from 1 _n into the blending tank 3 and realize the blending was realized.

[0015]

[Operation] In the device of the present invention, each storage tank 1 ₁
・ 1 ₂ ··· 1 _n of liquids of a predetermined type required for preparation are prepared, and then the weight of each liquid contained in each storage tank is designated by a designated weight value (designated value). −
Electrons to be reduced to a liquid feed tube bottoms weight values) meter 2 ₁ - 2
The control valves 5 ₁ , 5 _2, ..., 5 _n to the mixing tank 3 are opened while being monitored by the controller 6 via ₂ ... 2 _n . Therefore, in the device of the present invention, the mixing tank 3 is
Because from the reservoir 1 ₁ · 1 ₂ · · · · 1 _n have been position establishment of low liquid level there is drop, reservoir 1 occurs siphoning
Each liquid moves unpowered from ₁ · 1 ₂ ··· 1 _n to the mixing tank 3 unpowered.

Each storage tank 1 ₁ 1 ₂ ... 1 _n
When the controller 6 detects that the weight of each liquid in the above has decreased to the designated weight value, the control valve 5 ₁ , 5 _2, ... 5 _n connected to the achieved storage tank is closed. Send a command signal to stop the liquid movement immediately. In this case, the low-viscosity liquid W is stored in the storage tank 1 _{L.
When L} is accommodated, the controller 6 has a program for opening the control valve 5 _L of the liquid feed pipe 4 _{L when} all the control valves 5 ₁ , 5 _{2 for the} low viscosity liquid are closed. , The control valve 5 ₁ , 5 _2, ...
.. The residual liquid in the liquid supply pipes 4 ₁ , 4 _2, ... Downstream is discharged into the mixing tank 3 together with the low-viscosity liquid W _L.

By the way, since the series of operations in the apparatus of the present invention are performed in parallel for each liquid,
The total preparation time will be equal to the liquid delivery time for the maximum amount of liquid used.

[0018]

The present invention will be described in more detail below with reference to the embodiments shown in the accompanying drawings.

[Embodiment] First, the embodiment shown in FIG. 1 is shown as an apparatus for mixing one type of liquid W ₁ and one type of low viscosity liquid W _L , and the overall configuration is simple. Therefore, it is convenient to explain the operation principle of the present invention.

In FIG. 1, symbol M is a mother liquor tank; symbol P is a pump for pumping mother liquor from the mother liquor tank; V is a control valve provided on the discharge side of the pump P; symbol ₁₁ is a first liquid (for example, ink). Stock solution) Reservoir containing W ₁ ; code 1
_L is a low viscosity liquid (e.g., dilution water) reservoir for containing the W _L, reference numeral 2 ₁ · 2 _L electronic meter; numeral 3 is placed in the position of the reservoir 1 ₁ and 1 _L than low liquid level A mixing tank,
Reference numeral 4 ₁ is a siphon liquid feed pipe arranged from the storage tank 1 ₁ to the blending tank 3; Reference numeral 4 _L is placed from the storage tank 1 _L to the blending tank 3 near the outlet of the liquid feed pipe 4 _1. siphon liquid flue of communicating with a low viscosity fluid; code 5 ₁ · 5 _L is the liquid flue 4
The solenoid-operated control valve which is interposed in ₁ · 4 _L; code Le
Liquid level measuring device is installed in the storage tank 1 in _1, reference numeral 6 denotes a personal computer (manufactured by Yokogawa Electric Corporation: YEWMAC 520) a controller consisting of the electronic meter 2 ₁ · 2 _L and the liquid level measuring device Liquid W ₁ or low viscosity liquid W output from Le
The weight current value signal of _L and the liquid level current value signal in the storage tank 1 ₁ are calculated and analyzed, and the pump P and control valve V · 5 ₁
・ Send the necessary command signals to 5 _L and perform the necessary operations. In this embodiment, the siphon liquid feed pipes 4 ₁ and 4 _L are inserted into the storage tanks 1 ₁ and 1 _{L so} that a load is not applied to the storage tanks 1 ₁ and 1 _L.

When the ink stock solution W ₁ and the dilution water W _L are prepared by the mixing apparatus of the embodiment shown in FIG. 1 to produce an ink having a required concentration, the controller 6 is operated to change the ink stock solution W ₁ into the mother liquor. sent into the reservoir 1 ₁ by driving the pump P from the tank M. When the ink stock solution of the required amount in the storage tank 1 ₁ accumulates the value of the liquid level current value signal output from the liquid level meter Le reaches a certain value, the pump P is stopped controller 6 issues a command signal ,And,
The control valve V is closed.

Next, the controller 6 sends an opening command signal to the control valve 5 ₁ . Then, since there is a height difference between the storage tank 1 ₁ and the mixing tank 3, the undiluted ink solution W ₁ in the storage tank 1 ₁ travels through the liquid feed pipe 4 _{1 due} to the siphon phenomenon and is liquidless to the mixing tank 3. Will be sent. On the other hand, the electronic meter 2 ₁ during liquid feed of the ink stock solution W _1, counts the amount of decrease in the ink stock solution by weight in the storage tank 1 _1, and outputs to the controller 6 so as the weight current value signal. Then, when the ink stock solution W ₁ has decreased by a predetermined amount K ₁ , the controller 6 outputs a closing command signal to close the control valve 5 ₁ .

Subsequently, the controller 6 outputs an opening command signal to open the control valve 5 _L, and dilutes the diluted water W _L in the reservoir 1 _L through the liquid feed pipe 4 _L using the siphon phenomenon to prepare the mixing tank 3 _L. Send it to. Then, this time, since the liquid feed tube 4 _L communicates with the near outlet of Ekiokukan 4 _1, the ink stock solution W ₁ remaining in the discharge port near the liquid feed tube 4 ₁ dilution water W _L It is washed out cleanly and poured into the mixing tank 3. Therefore, it is not necessary to take any measures against errors due to residual liquid or liquid dripping as in the conventional case.

The liquid delivery control of the dilution water W _L is the same as in the case of the ink stock solution W ₁ , and the electronic measuring device 2 is used.
_{While L} is feeding the dilution water W _L , the reduction amount of the dilution water weight in the storage tank 1 _L is counted, and this is output to the controller 6 as a current weight value signal. Then, when the dilution water W _L decreases by a predetermined amount, the controller 6 outputs a closing command signal to close the control valve 5 _L.

Incidentally, in order to make sure, in this embodiment, since the liquid feed pipes 4 ₁ and 4 ₂ have a mechanism which does not apply a load, the liquid in the storage tanks 1 ₁ and 1 _L There will be no error in the double measurement. However, for example, the storage tank 1
Taking ₁ as an example, the liquid feed pipe 4 in the reservoir 1 ₁
Increase in volume of the ink stock solution W ₁ according to the _first volume causes an error in the light of the Archimedes' principle.

Therefore, FIG. 2 shows a cross section of the insertion portion of the cylindrical liquid feed pipe 4 ₁ . In FIG. 2, 2r the inner diameter of the liquid feed tube 4 _1, d the thickness of the liquid feed tube and a liquid medium and high liquid feed tube h, and the specific gravity of the ink stock solution W ₁ [rho, in the embodiment Ekiokukan 4 ₁
Since the ink stock solution W ₁ is filled in the inside, the liquid weight Δ corresponding to the volume of the liquid feed pipe 4 _{1 in} the liquid is increased by a value corresponding to Δ = πρ (r + d) ² h. Become. Now, the weight value at the time of starting the weight count is K1 _S , the liquid height of the liquid delivery pipe at the start of the weight count is h1 _S , and the weight value of only the ink stock solution W ₁ at the start of the weight count is W1 _S (K1 _S Minus the liquid amount in the liquid feed pipe), the weight value at the end of the weight count is K1 _e , the liquid height h1 _e of the liquid feed pipe at the end of the weight count, and the ink stock solution W at the end of the weight count. ₁ only the weight value and W1 _e, also the substantial weight value of the ink stock solution W ₁ a (real weight value of the ink stock solution W ₁ fed into the preparation tank 3) and W1 _g, the weight count start point The weight value is K1 _S = W1 _S + πρ (r + d) ² h1 _S ..... The weight value at the end of the weight count is K1 _e = W1 _e + πρ (r + d) ² h1 _e ...・ ・ ・ ・ ・ ・ ・Then, from the above formula, the weight value W1 _S of the ink stock solution at the time of starting the weight count = K1 _S −πρ (r + d) ² h1 _S ... Is derived, and the weight value of the ink stock solution at the end of the weight counting is W1 _e = K1 _e −πρ (r + d) ² h1 _e ... ... is guided. On the other hand, for the actual weight value of the ink stock solution W ₁ , the following formula is established, and thus W 1 _g = W 1 _S −W 1 _e・ ・ ・ By substituting the above equations and equations into the equations and rearranging, the following equations are obtained. W1 _g = K1 _S −K1 _e −πρ (r + d) ² (h1 _S −h1 _e ) ...

Therefore, when rigorous mixing is performed so that the weight value Δ of the liquid corresponding to the volume of the liquid feed pipe 4 _{1 in} the liquid cannot be ignored, the liquid level current value signal sent by the liquid level measuring device Le is sent. Based on the above, the controller 6 may correct the weight value Δ and sequentially update the predetermined value K1. In this case, if the volume of the liquid level measuring device Le causes an error in the weight measurement, an ultrasonic liquid level measuring device for measuring the position of the liquid surface by the ultrasonic feedback signal may be used. In addition, since the size of the liquid feed pipe 4 _{1 and} the size of the storage tank 1 ₁ are constant, the liquid level measuring device Le is not indispensable and the calculation of the above formula can be predicted in advance.

[Examples] Next, using the apparatus of the example shown in FIG. 3, three kinds of raw material liquids W ₁ , W ₂ , W
An example of mixing ₃ and one type of low-viscosity liquid (diluting liquid) W _L will be described. In this embodiment, the controller 6 is the distributed function body 6 ₁ , 6 ₂ , 6 ₃ and 6 _L.
Was made to correspond to each of the liquids W ₁ , W ₂ , W _3, and W _L to facilitate understanding.

In FIG. 3, symbols M _{1, 2, 3} and M _L are mother liquor tanks; symbols P _{1, 2, 3} and P _L are pumps for pumping the mother liquor from the respective mother liquor tanks; V _{1, 2, 3} And V _L are control valves provided on the discharge side of the pump P; symbols 1 _{1, 2 and 3}
Is a storage tank containing the liquids W _{1, 2, 3} as raw materials; code 1 _L
Is a storage tank containing a low-viscosity liquid (for example, a diluting liquid) W _L , reference numerals 2 _{1, 2 and 3} and 2 _L are electronic scales; reference numeral 3 is higher than the storage tanks 1 _{1, 2 and 3} and 1 _L blending tank installed in the position of the low liquid level, reference numeral 4 _{1, 2, 3} siphon liquid disposed in preparation tank 3 from each of the reservoir 1 _{1, 2 and 3} flue; reference numeral 4 _L is the reservoir A siphon liquid feed pipe for low viscosity liquid, which is arranged from 1 _L to the mixing tank 3 and communicated with the vicinity of each outlet of the liquid feed pipes 4 _{1, 2 and 3} ; reference numerals 5 _{1, 2 and 3} and 5 _{L 1 ・ 2 ・ 3} is a control valve installed in the liquid feed pipes 4 _{1 ・ 2 ・ 3} and 4 _L ; reference symbol Le is a liquid installed in each storage tank 1 _{1 ・ 2 ・ 3} and 1 _L Position measuring instrument; reference numerals 6 _{1, 2 and 3} and 6 _L are controller distributed function bodies composed of personal computers (YEWMAC 520 manufactured by Yokogawa Electric), and the electronic measuring instruments 2 _{1, 2 and 3} and 2 _L and liquid Position measuring instrument Le or The liquid level current value signal in the liquid W _{1, 2, 3} or low-viscosity liquid W _L of the weight current value signal and reservoir 1 _{1, 2, 3} and reservoir 1 _L which is et calculates and outputs the analysis, the Pump P _{1, 2, 3,} and P _L , control valve V _{1, 2, 3,} and V _L , 5
_It sends necessary command signals to _{1, 2, 3} , 5 _{L1, 2, 3} and performs necessary operations for these.

However, the liquid feeding mechanism and the control relationship in this embodiment are a combination of a plurality of the above-mentioned embodiments, and are substantially the same, so duplicate description will be omitted. In this embodiment, the storage tank 1
Low viscosity liquid feeding of the liquid W _L from _L to preparation tank 3, the joined gate from all feedstock liquid W1 _{1, 2 and 3} is completed with the liquid flue 4 _{1, 2, 3} outlets Do all at once.

Therefore, the processing time for preparing three kinds of raw material liquids W ₁ , W ₂ , W ₃ and one kind of low-viscosity liquid (diluting liquid) W _L using the apparatus of this embodiment will be described. First, each of the compounding amounts of the raw material liquids W ₁ · W ₂ · W ₃ and the low-viscosity liquid, that is, the diluting liquid W _L is set to K ₁ · K
₂・ K ₃・ K ₄ Assuming that the discharge amount of each liquid per unit time immediately before the mixing tank is δ, the raw material liquid W ₁ ·
The liquid feeding time of W ₂ and W ₃ is as follows. T ₁ = K ₁ / δ ···· T ₂ = K ₂ / δ ···· T ₃ = K ₃ / δ

Thus, the raw material liquids W ₁ , W ₂ , W ₃
Since the liquid transfer from the storage tank to the preparation tank is performed in parallel,
As shown in FIG. 4, the required liquid feeding time is T ₁ = T ₁ · T
_The maximum value of ₂ · T ₃ (the liquid raw material W ₃ in the example of FIG. 4) is defined. That is, it is as follows. T ′ = max (T ₁ , T ₂ , T ₃ ) = T ₃ ...

By the way, in the above case using the apparatus of this embodiment, the liquid feed of the diluting liquid W _L is started when the liquid feed of the raw material liquids W ₁ , W ₂ , W ₃ is completed. Assuming that the liquid feeding time of the diluted liquid W _L is T ₄ , T ₄ = K ₄ / 3δ .................., and the total mixing time T is T = T ₃ + T ₄

In the apparatus of this embodiment, the controller dispersion function body 6 _L is used for confirming the completion of the liquid feed of the raw material liquids W ₁ , W ₂ , W _{3 by} the other dispersion function bodies 6 _{1, 2, 3.} It is a system that monitors by the signal output from. Therefore, in the example of FIG. 4, the liquid feed of the low-viscosity liquid W _L (diluting liquid) is started after all the liquid feeds of the raw material liquids W _{1, 2, and 3} are completed, but more processing is performed. When you want to shorten the time, as shown in Fig. 5, each liquid W ₁ · W ₂ · W
Among _3, it is also effective to open a control valve 5 _L of liquid feed tube 4 _L of low-viscosity liquid W _L sequentially from the flow path but completing the liquid delivery to feed the low-viscosity liquid W _L.

[0035] That is, the amount K ₁ feedstock liquid W _1, trying magnitude relation of the amount K ₃ of the amount K ₂ and the raw material liquid W ₃ feedstock liquid W ₂ is to be K ₁ <K ₂ <K ₃ . Then, when the feed liquid from the storage tank 1 ₁ to preparation tank 3 is completed, open the control valve 5 _L1 shown in FIG. 3 low-viscosity liquid W _L
Is poured from the storage tank 1 _L into the mixing tank 3 at a rate of δ per unit time.

[0036] Next, reservoir 1 if ₂ from feed liquid feedstock liquid W ₂ to preparation tank 3 has been finished, the control valve 5 _L2 is open low-viscosity liquid W _L is 2δ per unit time from the storage tank 1 _L becomes a rate of being poured into preparation tank 3, and further, if the liquid feedstock liquid W ₃ from the reservoir 1 ₃ to preparation tank 3 feed is completed, the low-viscosity liquid control valve 5 _L3 opens W _L is poured into the mixing tank 3 from the storage tank 1 _{L at} a rate of 3δ per unit time. As a result, the total processing time T is
The formula is as follows. T = (K ₁ + K ₂ + K ₃ + K ₄ ) / 3δ ... T = (T ₁ + T ₂ + T ₃ ) / 3 + T ₄ · · · · · · was Isuzu and, K _4> 2K ₃ - a (K ₁ + K _3). Ta,
Since the condition of K ₄ > 2K ₃ − (K ₁ + K ₂ ) does not always hold, it may be necessary to actually adjust the liquid feeding timing of the low viscosity liquid W _L in FIG. 5 slightly.

The specific configuration of the present invention is generally the same as in the above embodiment.
As illustrated in and, the present invention is
It is by no means limited to the examples, but rather the "claims
Appropriate design changes are possible within the range described in
For example, the controller is described in the above embodiment.
Controller distribution function 6 for simplification_1/2/3・ 6
_LHowever, it is of course possible to process with a single PC.
And it is necessary to handle liquids with high viscosity.
In the case of
Insert a pump between the control valve and control them.
To shorten the liquid delivery time by controlling with a roller
Can also be said to be an optional additional design change.

Further, in the case that requires preparation accuracy of the liquid in the present invention, as shown in FIG. 6, the liquid feed tube 4 ₁
・ 4 ₂・ 4 ₃・ ・ ・ ・ Multiple branch pipes 4'having different diameters on the discharge end side
_1, 4 _'2, 4' ₃ ... provided, these branch pipes 4 _'1,
4 _'2, 4' ₃ each control valve 5 to ... _'1, 5' _2, 5 _'3 ....
In addition, a branch pipe is also provided at the discharge end of the liquid feed pipe 4 _{L for} the low-viscosity liquid W _L , and control valves 5 ′ _L1 , 5 ′ _L2 , 5 ′ _L3 are also provided for the branch pipes of these liquid feed pipes 4 _L. by adding ..., depending on the amount and the required accuracy, the controller 6 _{1, 2, 3 -----,} and 6
_A design change such that the control valve can be controlled to be opened and closed by _L to enable a skillful flow path operation naturally belongs to the technical scope of the present invention.

Further, when the precision of the mixing ratio of the low-viscosity liquid is not required, as shown in FIG. 7, the storage tank 1 _L and the electronic measuring device 2 _L in the embodiment of FIG. 3 are omitted. It may be replaced with the liquid delivery metering pump Q controlled by the controller distributed function body 6 _L , and such design changes naturally belong to the technical scope of the present invention.

Further, the liquid to be treated has a relatively low viscosity and no residual liquid remains in the liquid feed pipes 4 ₁ , 4 _2, ... 4 _n ,
Further, when it is not necessary to consider an error due to liquid dripping or the like, as shown in FIG. 8, it is not necessary to combine the low-viscosity liquid W _L in the liquid feed pipe for cleaning, and thus the low-viscosity liquid W _L
When the supply mechanism, the merging mechanism, and its control mechanism can be omitted, and the liquid feed pipes 4 ₁ , 4 _2, ..., 4 _n are siphon pipes, and it is difficult to feed high-viscosity liquid It is also possible to appropriately add a liquid feeding assist pump (not shown) to the above, and it must be said that such a design change belongs to the technical scope of the present invention.

[0041]

As described above in detail with reference to the embodiments, according to the device of the present invention, the mixing process of a plurality of kinds of liquids can be executed in parallel at the same time. Since it is determined by the maximum value of the liquid feed time in the used liquid, not by the added value of, it is possible to expect a significant improvement in the processing efficiency as compared with the case of using the conventional device.

Further, in the apparatus of the present invention, since the storage tank for the liquids to be mixed is arranged at a higher liquid level than the mixing tank, no power is required to transfer the liquid from the storage tank to the mixing tank, thus saving energy. The running cost will be cheaper in accordance with the request.

Further, in the apparatus of the present invention, when the siphon liquid feed pipe is used as the flow passage of the liquid from the storage tank to the mixing tank, the weight of the liquid feed pipe does not have to be added to the storage tank, so that electronic weighing is possible. There is no error in the liquid weight measurement by the instrument,
A highly accurate blending process can be realized.

Further, according to the apparatus of the present invention, even if the liquid to be mixed has a high viscosity, the low viscosity liquid is made to flow to the discharge end of the liquid feed pipe after discharging the high viscosity liquid, and the inside of the discharge side pipe Since all the residual liquid adhered to the can be sent to the mixing tank, there is no concern that residual liquid will remain in the pipe and a mixing error will occur as in the past, and it is possible to realize highly accurate liquid mixing. is there.

Further, according to the device of the present invention, as described above, since each component is cleverly systematized so that the controller can automatically manage the liquid, the unmanned preparation of the liquid is also possible, which is large. The labor saving effect can be achieved.

As described above, according to the present invention, it is possible to solve the problems that have been limited in the conventional apparatus of this type, and to surprisingly quickly and accurately prepare a plurality of kinds of liquids with high precision. It is possible, and the practical and economic merits obtained by this are extremely great, and its industrial utility value is extremely high.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of an automatic weighing and blending device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional explanatory view of an insertion portion of a liquid feed pipe in the liquid of the storage tank of the embodiment.

FIG. 3 is a block circuit diagram of an automatic weighing and blending device as an embodiment of the present invention.

FIG. 4 is a time chart in liquid preparation according to an example.

FIG. 5 is a time chart of liquid preparation when another control is performed according to the embodiment.

FIG. 6 is a block circuit diagram of an automatic weighing and blending device showing a modified example of the embodiment.

FIG. 7 is a block circuit diagram of an automatic weighing and blending device showing another modified example of the embodiment.

FIG. 8 is a block circuit diagram showing still another modification of the embodiment.

[Explanation of symbols]

1 ₁ - 1 ₂ · · · · 1 _L · · · · 1 _n storage tank, 2 ₁ - ₂ 2 · · · · 2 _L · · · · 2 _n electronic measuring instrument, 3 mixing bath, 4 _1, 4 ₂・ ・ ・ ・ 4 _L・ ・ ・ ・ 4 _n liquid feed pipe, 5 ₁・ 5 ₂・ ・ ・ ・ 5 _L・ ・ ・ ・ 5 _n control valve, 6 controller, 6 ₁・ 6 ₂・ ・ ・ ・ 6 _L ··· 6 _n controller dispersion function body, C mixed solution, M stock solution tank, P pump, W ₁ · W ₂ · W ₃ ··· W _n liquid W _L low viscosity liquid.

Claims (3)

[Claims] 1. A device for extracting a predetermined amount of a plurality of types of liquids W ₁ , W _2, ... W _n , respectively, and preparing the liquids, and a plurality of storage tanks 1 ₁ , 1 1 containing the respective liquids separately. ₂ ... 1 _n
A plurality of electronic scales 2 ₁ , 2 _2, ... 2 _n for measuring the weight of each liquid stored in these storage tanks and outputting a current weight value signal of each liquid; A mixing tank 3 arranged at a lower liquid level than that; a liquid level of both tanks arranged between this mixing tank 3 and each of the storage tanks 1 ₁ 1 ₂ ... 1 _n. A plurality of liquid feed pipes 4 ₁ , 4 _2, ..., 4 _n that enable liquid transfer from each storage tank to the mixing bath due to the difference; A plurality of control valves 5 ₁ , 5 _2, ..., 5 _n for controlling opening and closing of liquid movement to the tank;
Receiving the current value signal of the weight of each liquid output from each electronic measuring device, the liquid feed amount of each liquid to the mixing tank is calculated and measured, and a command signal is sent to each of the control valves based on each measured value. An automatic liquid metering and blending device, characterized in that it includes a controller 6 for delivery. 2. Each of the liquid feed pipes arranged between the mixing tank and each of the storage tanks is a siphon liquid feed pipe that enables liquid movement by a siphon phenomenon, and these siphon liquid feed pipes 2. An automatic liquid metering and blending device according to claim 1, wherein each of the storage tanks is inserted into the liquid without applying a load. 3. A plurality of types of liquids are taken out, a predetermined amount of each is taken out and fed into a mixing tank, and at least one low-viscosity liquid is fed into the mixing tank by a predetermined amount through a liquid feed pipe for each liquid, an apparatus for formulating the blending tank to the respective liquid and low-viscosity liquid with washout the inside of the liquid feed tube, a plurality of reservoir 1 for containing the respective liquids separately ₁ · 1 ₂ · · · · 1 _n And; a plurality of electronic measuring instruments 2 ₁ , 2 _2, ... 2 that measure the weight of each liquid stored in these storage tanks and output the current weight value signal of each liquid.
_n ; the mixing tank 3 arranged at a lower liquid level than each of the storage tanks; this mixing tank 3 and each of the storage tanks 1 ₁ 1 ₂
.... A plurality of liquid feed pipes 4 arranged between 1 _n and enabling liquid movement from each storage tank to the mixing tank due to difference in liquid level between both tanks
₁・ 4 ₂・ ・ ・ ・ 4 _n and these liquid feeding pipes 4 ₁・ 4 ₂・ ・ ・ ・
4 _n of liquid feed pipes 4 _L communicating with the discharge side to the blending tank 3 side and feeding at least one low viscosity liquid to feed the low viscosity liquid into the blending tank; intervening in each of these liquid feed pipes, A plurality of control valves 5 ₁ , 5 _2, ... 5 _n and 5 _L for controlling the opening and closing of the movement of each liquid to the mixing tank; and the current weight value signal of each liquid output by each electronic measuring instrument. An automatic liquid controller, comprising: a controller 6 for receiving and calculating the liquid feed amount of each liquid to the mixing tank, and sending a command signal to each of the control valves based on each measured value. Measuring and blending equipment.