JP3242556B2 - Automatic liquid mixing device for irrigation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical liquid mixing device used for an automatic irrigation system and the like, and more particularly, to a multi-liquid selection function for automatically selecting a mixed chemical according to purpose. The present invention relates to a chemical mixing device.

[0002]

2. Description of the Related Art A chemical mixing apparatus is adapted to mix liquid fertilizers, insect repellents and the like into water for irrigation in a timely and appropriate manner according to a watering program and cultivation conditions, thereby contributing to healthy plant growth. In a conventional chemical mixing apparatus, it is general that only one chemical tank is provided for one chemical supply line.

[0003]

In order to grow plants in a healthy manner, it is necessary to irrigate chemical liquids having different purposes, such as liquid fertilizers and pesticidal chemicals. There are many types of mixed chemicals depending not only on the purpose but also on the type of plant, the growth stage, and the cultivation conditions. In the conventional chemical mixing apparatus, when changing the mixed chemical, the operator has to replace the contents of the chemical tank or switch the supply line to the chemical tank to be changed.

Further, in an automatic watering system or the like, when plants having different plant types, growing stages and cultivation conditions are divided into strains and managed at the same time, it is necessary to select a suitable mixed chemical solution for each strain and to water them. You. In a conventional automatic irrigation system using a conventional chemical mixing device, it was not possible to perform a fine program irrigation by these systems.

The present invention has been made in view of the above-mentioned problems of the prior art, and has an automatic irrigation system in which a plurality of chemical tanks are provided so that a chemical to be mixed can be automatically selected according to the purpose.
And to provide a use chemical contamination device.

[0006]

According to the present invention, there is provided a chemical mixing apparatus having a double liquid selection function which achieves the above object.
The main pipe is connected to a main pipe flow meter and a chemical liquid supply line for mixing a chemical liquid into the main pipe. The chemical liquid supply line is provided with a pressurizing pump and a chemical liquid flow meter and a chemical liquid flow rate control valve downstream thereof, and A controller for inputting the ratio of the flow rate of the chemical solution to the flow rate of the chemical solution mixed therein to the control device, and the control device automatically controls the flow rate of the mixed chemical solution to a predetermined flow rate by the control device. In the automatic irrigation liquid mixing device for adjusting the pressure, a plurality of liquid tanks for supplying the liquid are provided, and a liquid supply line from each liquid tank is connected to the upstream side of the pressurizing pump via a liquid selection automatic valve, The selection automatic valve is controlled by the control device, and is configured to automatically select a liquid supply line from the chemical solution tank.

The above-mentioned automatic valves may be respectively provided in liquid supply lines from the respective chemical liquid tanks and connected to a pressure pump, or an automatic three-way switching valve may be provided at a branch point to each liquid supply line.

In the present invention, the control device inputs and outputs 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, so that the control device opens and closes the automatic valve to select the liquid supply line. Then, the inputted chemical tank is connected to the chemical supply line. In the chemical liquid supply line, the chemical liquid flow rate is adjusted by the installed chemical liquid flow rate adjusting valve so as to have a set mixing ratio, and the chemical liquid is mixed into the main pipe.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a chemical mixing apparatus having a double liquid selecting function according to the present invention will be described with reference to the drawings showing an embodiment thereof, 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 mixing and irrigation system. In the figure, 1 is a water source 17
a main pipe which is connected to an irrigation site connected to a main pipe pump 2 for pumping water 17 from a. A main pipe flow meter 3 is connected to the main pipe 1 and a chemical solution supply line for mixing a liquid fertilizer 10 downstream thereof. 4 are connected. The main pipe flow meter 3 is connected to the control device 11 and has a function of detecting the flow rate of the water 17 pressure-fed by the main pipe pump 2 from the water source 17a and transmitting a detection signal to the control device 11. The chemical supply line 4 receives an output signal from the control device 11 to adjust the flow rate of the chemical supply line 4, detects the flow rate of the chemical supply line 4, and sends the detection signal to the control device 11. The chemical solution flow meter 6, the chemical solution pressurizing pump 5 driven by the control device 11, and the strainer 8 are connected to the chemical solution supply line connection point 1
9, the upstream side of the strainer 8 branches into a plurality of chemical tanks 10a, 10b, and 10c containing different liquid fertilizers. An automatic chemical liquid selection valve 9 that opens and closes in response to an output signal from the control device 11 is provided. Plants of different types and growth stages are located in the terminal irrigation area.
a, 15b, and 15c are cultivated, are divided into a plurality of systems by a branch pipe 16 at one end of the main pipe, and an automatic watering valve 13 and a watering pipe 14 are provided for each system.

Next, the operation of the present embodiment for mixing liquid fertilizer will be described. The water 17 pumped by the main pipe pump 2 from the water source 17a is mixed with the liquid fertilizer 10 at a connection point 19 of the main pipe 1 with the chemical solution supply line 4 to become a liquid fertilizer dilution water 18 and is used for irrigation at the terminal irrigation site of the main pipe 1. By opening and closing the automatic valve 13, the plants 15a, 15b, 15
Watering is performed individually or simultaneously on c. The flow rate of the mixed liquid fertilizer 10 is adjusted by the chemical liquid flow rate control valve 7 so that the liquid fertilizer 10 pressurized by the chemical liquid pressurizing pump 5 has a dilution ratio set by the setting device 12. At this time, the control device 11 takes in the detected flow rate signal of the main pipe flow meter 3 and the detection signal of the chemical solution flow meter 6, calculates and calculates the actually measured dilution ratio, and sets the setting value.
Compared with the set dilution ratio input from Step 2, if the actually measured dilution ratio is larger than the set dilution ratio, an open signal is sent to the chemical solution flow control valve 7; The flow rate is adjusted so that it is sent and approaches the set dilution ratio. Next, the multiple liquid selection function according to the present invention will be described. In the control device 11, in addition to the dilution ratio from the setting device 12, the mixing start time, the mixing amount, the plurality of chemical solution tanks 10a,
Which liquid fertilizer is to be irrigated into which system out of 10b and 10c is input and programmed. 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 watering valve 13 so that the selected liquid fertilizer is irrigated by the system stored in the program, and selects the system to be irrigated. This function enables not only the selective irrigation of the liquid fertilizer for each system, but also the selective irrigation of the mixed fertilizer for all the systems, the irrigation by the system using only the water 17, and the many irrigation programs.

FIG. 2 is a schematic diagram showing another embodiment of the present invention. The difference from FIG. 1 is that the liquid supply line 2 receives an output signal from the control device 11 instead of the chemical liquid selection automatic valve 9.
An automatic flow control valve 9a for adjusting the flow rate of 0 is provided. The automatic flow control valve 9a is provided with a setting device 12
By programming the types and ratios of liquid fertilizers that are simultaneously mixed among the plurality of chemical solution tanks 10a, 10b, and 10c, the control device 11 receives the output signal so that the liquid fertilizers that are simultaneously mixed have the respective mixing ratios, and is opened. Degree adjustment is performed. With this function, a plurality of liquid fertilizers can be supplied at a programmed ratio and mixed into the main pipe 1 at the same time.
The operation is the same as that of FIG.

FIG. 3 is a schematic diagram showing another embodiment of the present invention. 1 is different from FIG. 1 in that two kinds of liquid fertilizers are selected and an automatic three-way switching valve 21 is provided at a branch point to the liquid supply line 20 instead of providing a chemical liquid selection automatic valve 9 in each liquid supply line 20. , One of the automatic three-way switching valves 21 is connected to the chemical supply line 4 in which a strainer 8, a chemical pressurizing pump 5, a chemical flow meter 6, and a chemical flow control valve 7 are sequentially provided, and the other is two types of chemical tanks 10a and 10b. Connected to each other. The automatic three-way switching valve 21 is controlled by the control device 11. The operation is the same as that of FIG.

[0014]

As apparent from the above description, the present invention solves the problems of the prior art because different chemicals can be automatically selected from a plurality of chemical tanks provided with different chemicals. And a detailed program irrigation suitable for healthy plant growth is possible.

[Brief description of the drawings]

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main pipe 2 ... Main pipe pump 3 ... Main pipe flow meter 4 ... Chemical liquid supply line 5 ... Chemical liquid pressurization 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 fertilizers 10a, 10b, 10c ... Drug tank 11 ... Control device 12 ... Setting device 13 ... Automatic valve for irrigation 14 ... Irrigation pipes 15a, 15b, 15c ... Plant 16 ... Branch pipe 17 ... Water 17a ... Water source 18 ... Liquid fertilizer dilution water 19 ... chemical liquid supply line connection point 20 ... liquid supply line 21 ... automatic three-way switching valve

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-253695 (JP, A) JP-A-7-16030 (JP, A) JP-A-4-106213 (JP, A) 53455 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01C 23/00-23/04 A01G 25/00 A01M 7/00

Claims (4)

(57) [Claims] A main pipe is connected to a main pipe flow meter and a chemical liquid supply line for mixing a chemical liquid into the main pipe. The chemical liquid supply line is provided with a pressurizing pump and a chemical liquid flow meter and a chemical liquid flow control valve downstream thereof. Along with the setting, a setting device for inputting the ratio of the flow rate of the main pipe and the flow rate of the chemical solution mixed into the main pipe to the control device is provided,
Automatic irrigation for automatically adjusting the chemical liquid flow rate control valve so that the flow rate of the mixed chemical liquid becomes a predetermined flow rate by the control device.
In the chemical solution mixing device, a plurality of chemical solution tanks for supplying a chemical solution are provided, and a liquid supply line from each of the chemical solution tanks is connected to an upstream side of the pressurizing pump via a chemical solution selection automatic valve, and the chemical solution selection automatic valve A chemical mixing device for automatic irrigation characterized by being controlled by a control device and configured to automatically select a liquid supply line from a chemical solution tank. 2. The chemical liquid mixing device for automatic irrigation 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 mixing device for automatic irrigation according to claim 1, wherein the chemical liquid selection automatic valve is an automatic flow control valve provided in each of the liquid supply lines. 4. The automatic three-way switching device, wherein the automatic liquid medicine selection valve is provided between a liquid supply line from the liquid medicine tank and the pressure pump, and switches communication between the liquid supply line and the pressure pump. The chemical mixing device for automatic irrigation according to claim 1, which is a valve.