JPS596190B2 - Continuous mixing device for pesticide liquid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for continuously mixing agrochemical liquids, ie, fertilizers, pesticidal liquids, etc., into pipelines for irrigation of rice fields and fields.

Conventionally, there are various types of mixing devices as described below, but each of them has its own problems.

In other words, (c) The batch method is the most primitive method, in which the stock solution and water are each weighed and poured into a mixing tank for agricultural chemicals, etc., and after stirring, the mixture is sucked and sprayed using a pump. requires considerable labor, requires large equipment, and cannot be supplied continuously.

(2) For those that use the differential pressure of the main water pressure to measure the mixing of pesticide liquid, increase the pump capacity or increase the diameter of the main line in order to set the differential pressure in the main line. Something must be done to reduce pressure loss.

Furthermore, if this is installed as is in existing equipment, the discharge pressure of the end sprinkler will drop, and uniform spraying cannot be expected, making it virtually impossible to use. (3) Types that use compressed air to measure the mixing of agricultural chemical liquid require compressed air to be the power source for injecting the agricultural chemical liquid into the main line, so compressed air equipment is especially required and equipment costs are high. increase The present invention was developed in view of the above circumstances, and includes a chemical liquid measuring tank that is opened on the suction side of a pump installed in the main line, so that the chemical liquid is sucked in proportion to the negative pressure caused by the suction of the pump. , the medicinal solution is supplied with an accurately measured amount by the medicinal solution measuring tank, and despite its relatively simple structure, it is possible to continuously mix in an accurately measured amount of the medicinal solution at a constant rate. It was devised in such a way.

This will be explained with reference to the diagram.

Reference numeral 1 denotes the primary side water suction pipe of the pump 3 which is introduced into the water source.

Reference numeral 2 denotes a flow meter installed in the primary water suction pipe 1, which measures the amount of suction into the water suction pipe 1 and transmits a pulse signal every time the suction amount reaches a certain volume.

4 is a secondary discharge pipe of the pump 3.

Reference numeral 5 denotes a chemical solution tank, and its chemical solution supply pipe 6 is attached via a solenoid valve T to a measuring tank 8 installed below the tank.

The chemical solution delivery injection pipe 9 of the metering tank 8 is attached to the primary side suction pipe 1 of the pump 3 via an electromagnetic valve 10 and a manual valve 11. 12 is a liquid level detector installed in the measuring tank 8; 13
is a ventilation pipe.

The flowmeter 2 and the solenoid valves 7 and 10 are connected by wires 14 and 15, respectively, and when the flowmeter 2 detects a certain volume, the pulse signal emitted by the flowmeter 2 causes the solenoid valves 7 and 10 to The opening operation is performed.

Further, the liquid level detector 12 and the electromagnetic valves 7, 10 are connected by wires 16, 17, respectively, and the electromagnetic valves 7, 10 are closed when the liquid level detector 12 detects a constant liquid level. The flow meter 2 may be provided in the secondary discharge pipe 4 depending on the case.

A measuring tank in which two 8', 8 bamboos are arranged side by side is similar in that each has a solenoid valve 7', 1', etc., but the manual valve 11 may be one common valve.

The action and effect will be explained.

When water is sucked from the water source by driving the pump 3, the flow meter 2 is activated and generates a pulse signal at every constant flow rate.

The first pulse signal causes the solenoid valve 7 to open, and the chemical liquid in the chemical liquid tank 5 flows down into the metering tank 8 via the supply pipe 6. The liquid level in the tank gradually rises, and when it reaches a certain height, the liquid level detector 12 is activated to close the solenoid valve 7, and the liquid level in the metering tank 8 remains unchanged. Next, when the second pulse signal is emitted by the flow meter 2, this opens the solenoid valve 10, and the measured amount of the chemical solution in the tank 8 is discharged by the suction negative pressure of the pump 3. The water is sucked into the water suction pipe 1. When the liquid level in the tank 8 gradually decreases, the liquid level detector 12 is activated again and the solenoid valve 10 is closed. Thereafter, this process is repeated to continuously mix the chemical solution. Note that the flow meter 2 is usually installed on the primary side of the pump 3, since the pressure loss is small, but if there is a concern about a decrease in suction pressure, it may be installed on the secondary side.

Furthermore, in order to alleviate the intermittent injection of the drug solution, the manual valve 11 of the injection pipe 9 is throttled to lengthen the injection time and reduce the interruption section.

Alternatively, this can be done by arranging a plurality of metering tanks 8' in parallel as shown in FIG. In the device of the present invention, as described above, mixing of the chemical liquid is carried out by the suction force on the primary side of the pump.
There is no need to seek another power source, and since it is unrelated to main water pressure, there is no need to increase the pump capacity or thicken the pipe diameter, and the overall configuration is extremely simplified. , and can be easily installed in existing equipment.

By installing a metering tank, this metering tank is automatically controlled by a flowmeter installed on the primary side of the pump, and the chemical solution measured in the metering tank is automatically controlled at each constant flow rate of water measured by the flowmeter. Since it is supplied into the primary water suction pipe, it is possible to continuously mix in precisely measured chemical solutions, making it possible to continuously spray the spray liquid at a constant concentration, and also to limit the spray area. It can be carried out without receiving any damage.

[Brief explanation of drawings]

FIG. 1 is a side view of the entire device, and FIG. 2 is a side view of another embodiment. 1...Primary side water suction pipe, 2...Flowmeter,
3...Pump, 4...Secondary side discharge pipe,
5... Chemical tank, 7... Solenoid valve, 8
...Measuring tank, 9...Medicine liquid delivery injection pipe, 10...Solenoid valve, 12...Liquid level detector.

Claims (1)

[Claims] 1. A measuring tank is connected to the chemical liquid tank via a solenoid valve, and a chemical liquid delivery injection pipe of the measuring tank is connected to the chemical liquid tank via a solenoid valve.
A flowmeter is attached to the primary side suction pipe of the pump, and a flowmeter is installed on the primary side suction pipe or secondary side discharge pipe of the pump, and a liquid level detector is installed on the measuring tank. A continuous mixing device for pesticide liquid, which controls the opening and closing of each of the electromagnetic valves, and supplies the measured chemical liquid in the metering tank into the primary water suction pipe at every constant flow rate of water measured by a flow meter.