JPH0947121A - Chemical mixing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chemical mixing apparatus having plural chemical tanks and capable of automatically selecting the chemicals to be mixed depending on purpose. SOLUTION: A chemical supplying line 4 for mixing chemicals is connected to a main tube 1, and plural chemical tanks 10a, 10b, 10c, which contain solutions of chemicals to be supplied, are attached on the chemical supplying line 4. A liquid-supplying line 20 from each chemical tank is connected to the upstream side of a chemical solution booster pump 5 through an automatic chemical selection valve 9, which is controlled by a controller 11. The chemicals to be mixed from the plural chemical tanks 10a, 10b, 10c and mixing ratios of the chemicals are inputted to the controller 11 by a setter 12, and thus, the opening and shutting of the automatic chemical selection valve 9 by the controller 11 are enabled to select a liquid-supplying line 20 and the selected chemical tank is connected to the chemical liquid supplying line 4. In the chemical supplying line 4, the flow rate of each chemical is adjusted by a chemical flow rate adjusting valve 7 so that mixing ratios match the specified mixing ratios and the chemicals are mixed into the main tube 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drug solution mixing device used in an automatic irrigation system or the like, and more specifically, to a compound liquid selection function capable of automatically selecting a drug solution to be mixed according to the purpose. The present invention relates to a chemical mixing device.

[0002]

2. Description of the Related Art A chemical liquid mixing device contributes to healthy growth of plants by mixing liquid fertilizer, insect repellent chemical liquid and the like into irrigation water in a timely and appropriate manner according to a watering program and cultivation conditions. In the conventional chemical liquid mixing apparatus, it is general that only one chemical liquid tank is provided for one chemical liquid supply line.

[0003]

[Problems to be Solved by the Invention] In order to grow plants soundly, it is necessary to irrigate liquids such as liquid fertilizers and insect repellents for different purposes. In addition, there are many kinds of mixed chemicals depending on the kind of plant, the growth stage, and the cultivation conditions as well as the purpose. In the conventional chemical liquid mixing apparatus, when changing the mixed chemical liquid, the operator had to replace the contents of the chemical liquid tank or switch the supply line to the chemical liquid tank to be changed.

Further, in an automatic irrigation system or the like, when dividing plants of different plant types, growth stages and cultivation conditions into lines and managing them at the same time, it is necessary to select a mixed chemical solution suitable for each line and irrigate it. It In the conventional automatic irrigation system using the chemical mixing device, detailed program irrigation by each system could not be performed.

The present invention has been made in view of the above problems of the prior art, and provides a chemical liquid mixing device which is provided with a plurality of chemical liquid tanks and can automatically select a chemical liquid to be mixed according to the purpose. The purpose is to

[0006]

Means for Solving the Problems The constitution of the present invention in a chemical liquid mixing apparatus having a multiple liquid selection function that achieves the above object is
A main pipe flow meter and a chemical liquid supply line for mixing a chemical liquid into the main pipe are connected to the main pipe, and a pressurizing pump and a chemical liquid flow meter and a chemical liquid flow rate adjusting valve are installed on the downstream side of the pressurizing pump, and the main pipe is connected to the main pipe. The controller is provided with a setting device for inputting the ratio of the flow rate of the chemical liquid to the flow rate of the chemical liquid mixed into the controller, and the flow rate of the chemical liquid mixed is automatically adjusted to a predetermined flow rate by the controller. In the chemical liquid mixing device for adjusting, a plurality of chemical liquid tanks for the chemical liquid to be supplied are provided, and liquid supply lines from the respective chemical liquid tanks are connected to the upstream side of the pressurizing pump via the chemical liquid selection automatic valve, and the chemical liquid selection automatic valve Is configured so that the liquid supply line from the chemical liquid tank can be automatically selected by being controlled by the control device.

The above-mentioned automatic valve may be provided in a liquid supply line from each chemical liquid tank and connected to a pressurizing pump, or an automatic three-way switching valve may be provided at a branch point to each liquid supply line.

In the present invention, by inputting the chemical liquid mixed from a plurality of chemical liquid tanks provided by the setting device and the mixing ratio of the chemical liquid to the control device, the control device opens and closes the automatic valve to select the liquid supply line. Then, the inputted chemical liquid tank is connected to the chemical liquid supply line. In the chemical liquid supply line, the chemical liquid flow rate is adjusted by a chemical liquid flow rate control valve installed so that the mixture ratio is set, and the chemical liquid is mixed into the main pipe.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A chemical liquid mixing device having a function of selecting a multiple liquid according to the present invention will be described below with reference to the drawings showing an embodiment, but it goes without saying that the present invention is not limited to this embodiment. .

FIG. 1 shows an embodiment in which the present invention is used in an automatic liquid fertilizer-mixed irrigation system. In the figure, 1 is a water source 17
It is a main pipe that is piped from a to a irrigation area connected to a main pipe pump 2 that pumps water 17 under pressure, a main pipe flow meter 3 is connected to the main pipe 1, and a chemical liquid supply line for mixing liquid fertilizer 10 on the downstream side thereof. 4 is connected. The main pipe flow meter 3 is connected to the control device 11, detects the flow rate of the water 17 pumped by the main pipe pump 2 from the water source 17 a, and sends the detection signal to the control device 11. The chemical liquid supply line 4 receives the output signal from the control device 11 to adjust the flow rate of the chemical liquid supply line 4, and detects the flow rate of the chemical liquid supply line 4 and sends the detection signal to the control device 11. The chemical liquid flow meter 6, the chemical liquid pressurizing pump 5 driven by the controller 11, and the strainer 8 are connected to the chemical liquid supply line connecting point 1
9, the upstream side of the strainer 8 is branched into a plurality of chemical liquid tanks 10a, 10b, 10c containing different liquid fertilizers, and a liquid supply line 20 from the branch point to the chemical liquid tanks 10a, 10b, 10c is provided. A chemical liquid selection automatic valve 9 that opens and closes in response to an output signal from the control device 11 is provided. Plants with different types and stages of development are located in the terminal irrigation areas.
A, 15b, and 15c are cultivated, and are divided into a plurality of lines by a branch pipe 16 at the end of the main pipe, and an automatic irrigation valve 13 and an irrigation pipe 14 are provided for each line.

Next, the operation of mixing liquid fertilizer according to this embodiment will be described. The water 17 pumped from the water source 17a by the main pipe pump 2 is mixed with the liquid fertilizer 10 at the connection point 19 with the chemical liquid supply line 4 of the main pipe 1 to become the liquid fertilizer diluted water 18, which is used for irrigation at the terminal irrigation site of the main pipe 1. By opening and closing the automatic valve 13, the irrigation pipe 14 is connected to the plants 15a, 15b, 15
Irrigation is applied to c individually or simultaneously. The liquid fertilizer 10 to be mixed has its flow rate adjusted by the chemical liquid flow rate adjusting valve 7 so that the liquid fertilizer pressurized by the chemical liquid pressurizing pump 5 has the dilution ratio set by the setting device 12. At that time, the control device 11 takes in the detected flow rate signal of the main pipe flow meter 3 and the detected signal of the chemical liquid flow meter 6, calculates and obtains the actually measured dilution ratio, and the setter 1
Compared with the set dilution ratio input from 2, when the measured dilution ratio is larger than the set dilution ratio, an open signal is sent to the chemical liquid flow control valve 7, and when it is smaller, a close signal is sent to the chemical liquid flow control valve 7. The flow rate is adjusted by sending it to get closer to the set dilution ratio. Next, the double liquid selection function according to the present invention will be described. In addition to the dilution ratio from the setting device 12, the control device 11 has a mixing start time, a mixing amount, a plurality of chemical liquid tanks 10a,
It is programmed by inputting which liquid fertilizer among 10b and 10c to which system. The control device 11 opens and closes the chemical liquid selection automatic valve 9 so that the liquid fertilizer is mixed as stored in the program, and selects the liquid supply line 20. Further, the control device 11 opens and closes the automatic irrigation valve 13 so that the selected liquid fertilizer is irrigated to the system stored in the program, and selects the system for irrigation. With this function, not only selective irrigation of liquid fertilizer for each system but also selective irrigation of mixed liquid fertilizer for all systems, system-specific irrigation of water 17 alone, and many program irrigations are possible.

FIG. 2 is a schematic view showing another embodiment of the present invention. The difference from FIG. 1 is that instead of the chemical liquid selection automatic valve 9, the liquid supply line 2 receives an output signal from the control device 11.
An automatic flow rate adjusting valve 9a for adjusting the flow rate of 0 is provided. The automatic flow rate control valve 9a includes a controller 11 and a setter 12
By programming the types and ratios of the liquid fertilizers simultaneously mixed in the plurality of chemical liquid tanks 10a, 10b, 10c, the controller 11 receives output signals so that the liquid fertilizers simultaneously mixed have respective mixing ratios. The degree is adjusted. With this function, a plurality of liquid fertilizers can be supplied at a programmed ratio and simultaneously mixed into the main pipe 1.
The operation is the same as in FIG.

FIG. 3 is a schematic view showing another embodiment of the present invention. The point different from FIG. 1 is that two liquid fertilizers are selected, and each liquid supply line 20 is not provided with a chemical liquid selection automatic valve 9, but an automatic three-way switching valve 21 is provided at a branch point to the liquid supply line 20. , One of the automatic three-way switching valves 21 is connected to a chemical solution supply line 4 in which a strainer 8, a chemical solution pressurizing pump 5, a chemical solution flow meter 6, and a chemical solution flow rate adjusting valve 7 are provided in order, and the other is two types of chemical solution tanks 10a and 10b. Respectively connected to. The automatic three-way switching valve 21 is controlled by the controller 11. The operation is the same as in FIG.

[0014]

As is apparent from the above description, the present invention can automatically select a chemical solution to be mixed from a chemical solution tank provided with a plurality of chemical solutions, so that the problems of the prior art can be solved, and different chemical solutions for different systems can be mixed. Therefore, detailed program watering suitable for healthy plant growth can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic view showing an automatic liquid fertilizer-mixed irrigation system using a chemical liquid mixing device according to one embodiment of the present invention.

FIG. 2 is a schematic diagram showing an automatic liquid fertilizer-mixing irrigation system using a chemical liquid mixing device according to another embodiment of the present invention.

FIG. 3 is a schematic diagram showing an automatic liquid fertilizer-mixing irrigation system using a chemical liquid mixing device according to still another embodiment of the present invention.

[Explanation of symbols]

 1 ... Main pipe 2 ... Main pipe pump 3 ... Main pipe flow meter 4 ... Chemical liquid supply line 5 ... Chemical liquid pressurizing pump 6 ... Chemical liquid flow meter 7 ... Chemical liquid flow control valve 8 ... Strainer 9 ... Chemical liquid selection automatic valve 9a ... Automatic flow control valve 10 ... liquid fertilizer 10a, 10b, 10c ... chemical liquid tank 11 ... control device 12 ... setting device 13 ... automatic irrigation valve 14 ... irrigation pipe 15a, 15b, 15c ... plant 16 ... branch pipe 17 ... water 17a ... water source 18 ... liquid fertilizer dilution water 19 ... Chemical supply line connection point 20 ... Liquid supply line 21 ... Automatic three-way switching valve

Claims (4)

[Claims] 1. A main pipe flowmeter and a chemical liquid supply line for mixing a chemical liquid are connected to the main pipe, and a pressurizing pump and a chemical liquid flowmeter and a chemical liquid flow control valve are provided downstream of the chemical liquid supply line. Along with the installation, a setting device for inputting the ratio of the flow rate of the main pipe and the flow rate of the chemical liquid mixed into it to the control device is provided.
In a chemical liquid mixing device that automatically adjusts the chemical liquid flow rate control valve so that the flow rate of the chemical liquid to be mixed becomes a predetermined flow rate by the control device, a plurality of chemical liquid tanks of the chemical liquid to be supplied are provided, and the chemical liquid tanks are supplied from each chemical liquid tank. A liquid line is connected to the upstream side of the pressurizing pump via a chemical liquid selection automatic valve, and the chemical liquid selection automatic valve is controlled by the control device so that the liquid supply line from the chemical liquid tank can be automatically selected. The chemical liquid mixing device characterized in that 2. The chemical liquid mixing device according to claim 1, wherein the chemical liquid selection automatic valve is an automatic opening / closing valve provided in each of the liquid supply lines. 3. The chemical liquid mixing device according to claim 1, wherein the chemical liquid selection automatic valve is an automatic flow rate control valve provided in each of the liquid supply lines. 4. The automatic three-way switching, wherein the chemical liquid selection automatic valve is provided between a liquid supply line from the chemical liquid tank and the pressure pump, and switches communication between the liquid supply line and the pressure pump. The chemical liquid mixing device according to claim 1, which is a valve.