JPH0226533B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention provides a method for storing fluids such as dyes, chemicals, pigments, surfactants, natural/synthetic polymer materials, water, oil, air, gas, etc. in advance from a plurality of tanks. This invention relates to an automatic blending device for measuring a predetermined amount of fluid such as dyes and chemicals into containers. (Prior art) In general, systems and devices for blending fluids such as dyes and chemicals are characterized by high-mix, low-volume production. Therefore, accurate measurement of the flow rate is required to ensure uniform quality, and a reduction in the time required for preparation is required to improve productivity, as well as a reduction in work. be done. However, in conventional fluid blending devices, the feed flow rate is measured using an electronic scale, etc., which tends to cause measurement errors and makes it difficult to perform accurate measurements. The workability was poor as it required zero point correction, and it was extremely difficult to shorten the weighing time. If there is a measurement error like this, the accuracy of the proportion of the preparation amount will decrease, for example,
Taking the preparation of dyes as an example, there have been problems such as the color of the preparation becomes poor and the product becomes defective. In addition, there have traditionally been high-precision measuring meters such as electromagnetic flowmeters and gear flowmeters, which automatically measure liquids such as dyes in batches, but in order to mix many types of dyes, it is necessary to Measuring each liquid takes time and reduces productivity. Particularly in the case of dyes, etc., the concentration must be kept constant, but as a characteristic of dyes, condensation and precipitation tend to occur, and in such cases, there has been a problem that accurate mixing becomes impossible. (Object of the Invention) The present invention has been made in view of the various problems of the conventional art described above. An object of the present invention is to provide an automatic fluid dispensing device that enables accurate preparation of fluids. (Structure of the Invention) In the present invention, piping is arranged from a plurality of tanks individually storing fluids such as dyes and chemicals to one preparation container, and a preset amount of fluid is measured and each Dye charged from tank into container 1,
This is an automatic blending device for fluids such as chemicals, in which each pipe is provided with a pump at an appropriate position on its upstream side and a manifold at an appropriate position on its downstream side, and a first branch path and a second branch path are provided between the pump and the manifold. is formed,
A first flow meter that measures a large flow rate to a small flow rate is interposed in the first branch path, a second flow meter that measures a minute flow rate is installed in the second branch path, and the second flow meter that measures a minute flow rate is installed in the second branch path. A return pipe is provided from the downstream side of each of the first and second flowmeters to the tank side where the pipe is installed via a three-way switching valve, and the above-mentioned A pump flow rate switching valve that variably returns a part of the fluid sent from the pump to the tank side is provided, and a piping for supplying hot water or water is connected to the manifold, and a third valve is installed in the middle of this piping.
A flow meter and a solenoid valve are installed to set and output the amount of charge from each tank, and according to this amount of charge, the pump flow rate switching valve in each pipe is switched and one of the first or second branch paths is switched. The three-way switching valve is switched and opened, the flow rate of the fluid to be sent is measured by a flow meter installed in the opened branch passage, and after the measurement, the three-way switching valve is switched and the circulation passage is opened. The apparatus is equipped with a control device that opens and closes the electromagnetic valve in order to charge a predetermined amount of hot water or water through the manifold. That is, according to this configuration, one of the flow meters installed in the branch path of each pipe is selected according to the amount of preparation from each tank, and the pump flow rate switching valve selects the amount suitable for the flow meter. Fluid is sent and the set amount of preparation is measured. After measuring the set charge amount, the fluid sent from the pump circulates through the circulation path, and hot water or water is charged into the downstream container via the manifold. In this way, the set fluid is charged from each tank into one container in parallel. (Example) An automatic dye blending apparatus according to an example of the present invention will be described below with reference to FIG. In Figure 1, 1 is a dye tank prepared for each type of dye, and 2 is a dye container in which the dye from each of the plurality of dye tanks 1 and warm water from a separate tank are mixed and charged. The dye tank 1 and the dye container 2 are connected by a pipe 3, and a pump 4 is installed on the upstream side of the pipe 3.
A manifold 5 is provided on the downstream side to collect the dye and hot water. Further, the piping between the pump 4 and the manifold 5 is branched into a plurality of branch pipes 3a and 3b, and one branch pipe 3a
An electromagnetic flowmeter 6 for measuring a large flow rate to a small flow rate is installed in the branch pipe 3b, and a gear flowmeter 7 for measuring a minute flow rate is installed in the other branch pipe 3b. Furthermore, a reflux pipe 9 is provided which returns from the downstream piping of the electromagnetic flowmeter 6 and the gear flowmeter 7 to the dye tank 1 via three-way switching valves 8, 8, respectively. Also,
Pipes 10 for supplying hot water or water from separate tanks (not shown) are connected to each of the manifolds 5, and an electromagnetic flowmeter 11 is interposed at the confluence on the upstream side of the piping 10. A solenoid valve 12 is provided immediately before each manifold 5 on the downstream side. Then, the electromagnetic flow rate of the pipe 3 (including the pipe 3c) leading from the dye tank 1 to the dye container 2 via the pump 4, the electromagnetic flowmeter 6, the gear flowmeter 7, and the manifold 5 (including the pipe 3c) and the pipe 10 connected to the manifold 5. On the downstream side of the total 11, a large number of sets are provided depending on the type of dye to be charged. 13 is a microprocessor (CPU) which has a memory in which the amounts of a large number of dyes to be prepared are stored in advance, and into which detected flow rates from the electromagnetic flowmeter 6, gear flowmeter 7, etc. are input; 14 is a sequencer; ,
These constitute a control device, and the microprocessor 13 determines the flow rate of either the electromagnetic flowmeter 6 or the gear flowmeter 7 according to the amount of dye to be charged via the sequencer 14. The detection level of the pump 4 is switched between large flow rate and medium and small flow rate, and in conjunction with this switching, the pump 4
The pump flow rate of the dye tank 1 is switched between high and low, and furthermore, the solenoid valve 12 is controlled to open and close so that a predetermined amount of warm water or water is charged after the preparation of a predetermined flow rate of dye is completed, and the three-way switching valve 8 is switched. It is controlled so that a circulation path consisting of the pump 4, the branch pipe 3a or 3b, and the reflux pipe 9 is configured. Reference numeral 15 denotes a bypass pipe provided between the downstream side of the pump 4 and the dye tank 1. A solenoid valve 16 is interposed in this bypass pipe 15. Opening and closing of this solenoid valve 16 bypasses the pump flow rate and increases the pump capacity. It is now possible to switch between high and low levels. 17 is a dye stirrer provided in the dye tank 1, 18 is a level meter for detecting the level of the dye in the dye tank 1, and 19 is a check valve provided in the middle of the piping. The operation of the above configuration will be explained. Based on the amount of each type of dye stored in the memory of the microprocessor 13, the dyes are sent out through the pipe 3 by the pump 4.
The flow rate is measured by either the electromagnetic flowmeter 6 or the gear flowmeter 7, and is charged into the dye container 2 through the manifold 5 and the pipe 3c between the manifold 5 and the dye container 2. When the flow rate detected by these flowmeters reaches a preset charge amount, the three-way switching valve 8 switches to the reflux pipe 9 side, and the pump 4, flowmeter 6 or 7, on the way from the dye tank 1 to the pipe 3, A circulation path consisting of a valve 8 and a reflux pipe 9 is formed, and in this circulation path, the dye on the way to the pipe 3 is circulated without stopping its flow, so that the dye does not coagulate or precipitate. Prevented. At the same time, the solenoid valve 12 is opened, and hot water or water is supplied to the manifold 5 through the pipe 10, and further this hot water or water is supplied into the dye container 2 through the pipe 3c. In this way, hot water or water is supplied to the pipe 3c downstream of the manifold 5 after the dye has been charged at a predetermined flow rate.
The inside is cleaned, and therefore the dye aggregates in the pipe 3c.
There is no precipitation, and when the next dye is mixed in a different amount, it is prevented from being affected by the previous dye mix, and the color of the mix is maintained well. . In addition, when the amount of dye to be charged is relatively large, it is first measured using the electromagnetic flowmeter 6, and the electromagnetic valve 16 provided in the bypass pipe 15 of the pump 4 is closed to eliminate the bypass of the pump flow rate. The pump flow rate is increased to increase the flow rate per unit time for measurement, and after a predetermined flow rate is detected, the solenoid valve 16 is opened to form a bypass flow for the pump 4, thereby lowering the pump flow rate. In this state, the electromagnetic flowmeter 6 is used to measure the predetermined amount, and then the gear flowmeter 7 is used to measure the amount in stages. It is possible to measure accurately in a short time. FIG. 2 shows the relationship between the set amount, the amount charged, and the measuring time when various dyes are prepared using the automatic blending device of the present invention. In this example, the blends are dye A to dye F.
, warm water, and glue, and the appropriate pump flow rate per unit time is determined based on the set amount and preparation amount of each. For example, for dyes with a small preparation amount, the flow rate per unit time is lowered and the metering time is relatively short. This is done by taking a long time for accurate measurement. Also,
After the preparation of various dyes is completed, hot water is metered and supplied. Note that the glue is separately supplied to the dye container 2 from a separate tank (not shown). In this way, in the past, one liquid had to be measured one by one, but according to the present invention, it is possible to measure many types of liquid at the same time, and as mentioned above, the pump flow rate can be adjusted to high or low using the pressure feeding method using the pump. Since the measurement time is switched to , the measurement time can be shortened. In addition, in the above description of the embodiment, in order to switch the pump flow rate, the bypass pipe 15 and the electromagnetic valve 16 are used, but the capacity of the pump 4 itself may be switched. Figure 3 shows a test system diagram for measuring measurement variations when a minute flow rate is taken in the automatic blending device of the present invention, where the same numbers as above indicate the same parts, and 20 sets the intake amount. A batch counter 21 is a balance for measuring the weight of the container 2. This test system shows that the dye stored in tank 1 is a disperse dye (yellow, specific gravity is greater than 1).
Using the gear flowmeter 7 as the flowmeter and using the quantitative signal from the batch counter 20 in the same manner as above, the test results were measured when the flow rate per unit time was 0.34 and 3.8 for a set flow rate of 10 ml. was as follows.

[Table] It can be seen that the variation range is extremely small even when measuring extremely small amounts, and therefore it is possible to accurately measure flow rates down to extremely small flow rates. (Effects of the Invention) As described above, according to the present invention, the amount of preparation can be appropriately measured in the middle of each piping from a plurality of tanks storing fluids such as various dyes and chemicals to one container. In addition to providing a flow meter that can be selected depending on the size, a pump flow rate switching valve is used to send fluid at an amount suitable for measurement by the flow meter, so it can handle many types of fluids with different proportions, from large flow rates to minute flow rates. They can be prepared at the same time, and therefore the measuring time can be greatly shortened and accurate preparation is possible. In addition, after the preparation is complete, fluids such as dyes and chemicals are constantly circulated between the flow meter and the tank via the circulation pipe, which prevents the fluid from coagulating, settling, or separating in the piping. This allows fluid to be supplied in a stable state at all times, ensuring stable quality. Furthermore, after the parallel preparation of dyes and chemicals is completed, hot water or water is charged downstream from the manifold, which cleans the piping from the manifold to the container and eliminates clogging and residual liquid. It is possible to avoid the influence on the next preparation due to this.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the automatic blending device for fluids such as dyes and chemicals of the present invention, and Fig. 2 shows the set amounts of various liquids when preparing using the synchronized blending device. FIG. 3 is a diagram illustrating the effects of the amount of preparation and measuring time, and is a test system diagram when conducting a quantitative uptake test in the synchronization device. 1... Dye tank (tank), 2... Dye container (container), 3... Piping, 3a, 3b... Branch pipe, 3
c... Piping, 4... Pump, 5... Manifold, 6... Electromagnetic flow meter, 7... Gear flow meter, 8...
...Three-way switching valve, 9...Recirculation pipe, 10...Piping, 1
1... Electromagnetic flowmeter, 12... Solenoid valve, 13... Microprocessor (control device), 14... Sequencer.

Claims (1)

[Claims] 1. Piping is arranged from multiple tanks each containing fluids such as dyes and chemicals to one container, and a preset amount of fluid is measured and charged from each tank into one container. , an automatic blending device for fluids such as chemicals, in which each pipe is provided with a pump at a suitable position on its upstream side and a manifold at a suitable position on its downstream side, and a first branch path and a second branch line are provided between the pump and the manifold. A path is formed, a first flowmeter that measures a large flow rate to a small flow rate is interposed in the first branch path, and a second flow meter that measures a minute flow rate is installed in the second branch path. interposed, and the first and second
A return pipe is provided from the downstream side of each of the flowmeters to the tank side where the pipe is installed via a three-way switching valve, and the fluid sent from the pump to the upstream side of the first and second flowmeters is provided. A pump flow rate switching valve that variably returns a part of the water to the tank side is provided, and a piping for supplying hot water or water is connected to the manifold, and a third flow meter and a solenoid valve are connected in the middle of this piping. The system sets and outputs the charging amount from each tank, and switches the pump flow rate switching valve in each pipe according to the charging amount, and also switches the three-way switching valve on one of the first or second branch passages. The flow rate of the fluid sent is measured by a flow meter installed in the opened branch path, and after the measurement, the three-way switching valve is switched to open the circulation path and hot water or water is supplied by the manifold. An automatic mixing device for fluids such as dyes and chemicals, which is equipped with a control device that opens and closes the above-mentioned solenoid valve to dispense only a fixed amount.