JP4633535B2 - Metering spray device - Google Patents

Description

The present invention relates to an apparatus for measuring a chemical solution and spraying a predetermined amount of the chemical solution.

In the metering spray, a metering means and a spraying means are required. For example, Patent Document 1 has a pump / motor (motor) as metering means and a compressed air source / nozzle as spraying means. According to the technique of Patent Document 1, an electric motor (motor) and a compressed air source are indispensable as two different driving sources, so that the configuration of the apparatus is complicated, and special control of the electric motor (motor) for measurement is performed. (Rotation amount control) is required.

JP 2000-42456 A

Accordingly, an object of the present invention is to make it possible to measure a chemical solution by using a compressed air source as a drive source of a spray nozzle, thereby omitting a metering electric motor (motor).

Under the above-mentioned problems, the present invention connects the chemical tank (2) to the measuring tank (4) of the sealed chemical liquid (3) by the first solenoid valve (11), so that the measuring tank (4) The upper part and the lower part are connected to two input ports of the second electromagnetic valve (12) for switching, and one output port of the second electromagnetic valve (12) is connected to the chemical liquid intake port (6) of the spray nozzle (5). And the compressed air source (10) is connected to the compressed air intake port (7) of the spray nozzle (5) by the third solenoid valve (13), and the chemical solution ( A level sensor (8) for detecting the measurement level of 3) is connected to a controller (14) for operating a solenoid valve to constitute a metering spray device (1).

The controller (14) for operating the solenoid valve opens the first solenoid valve (11) and switches the second solenoid valve (12) when measuring the chemical solution (3), and then switches the third solenoid valve (13). By opening and spraying compressed air (9) from the spray nozzle (5), the chemical liquid (3) in the chemical liquid tank (2) is discharged by the negative pressure generated in the spray nozzle (5). When the metering level of the chemical solution (3) in the meter tank (4) is detected by the level sensor (8), the first solenoid valve (11) is closed by the controller (14), and the second solenoid valve is By switching (12), the drawing of the chemical liquid (3) into the measuring tank (4) is stopped, and after this time, the measured chemical liquid (3) is generated by the negative pressure generated in the spray nozzle (5). ) Into the spray nozzle (5) 5) spraying the predetermined amount of chemical liquid (3) from.

The controller (14) measures and sprays the chemical liquid (3) at a predetermined cycle by the time operation control function. The first solenoid valve (11) is composed of a solenoid valve that can be opened to the atmosphere, and the second solenoid valve (12) is composed of a three-way valve that switches connection to the meter tank (4).

According to the present invention, when the chemical liquid (3) in the chemical liquid tank (2) is drawn into the measuring instrument tank (4) when measuring the chemical liquid (3), the compressed liquid (9) causes the chemical liquid (3) to enter the spray nozzle (5). Since the generated negative pressure is used, it is not necessary to control the electric motor (motor) and the amount of rotation thereof, the configuration is simplified correspondingly, and the apparatus is inexpensive.

When the controller (14) measures and sprays the chemical liquid (3) at a predetermined cycle, pest control in a warehouse, a food factory, an underground space, or the like can be automated. When the first solenoid valve (11) is composed of a solenoid valve that can be opened to the atmosphere, and the second solenoid valve (12) is composed of a three-way valve that switches connection to the measuring tank (4), Configuration is simplified.

FIG. 1 shows a metering spray device 1 according to the present invention. The metering spray device 1 has a chemical tank 2 connected to a sealed measuring tank 4 of a chemical liquid 3 by a first electromagnetic valve 11 and two input ports of a second electromagnetic valve 12 for switching the upper and lower connections of the measuring tank 4. And one output port of the second solenoid valve 12 is connected to the chemical liquid intake port 6 of the spray nozzle 5, and the compressed air source 10 is connected to the air filter 15, the third solenoid valve 13 and the spray nozzle 5. A decompression mechanism 18 is connected to the compressed air intake port 7 of the spray nozzle 5, and a level sensor 8 for detecting the measurement level of the chemical 3 at the position of the measuring tank 4 is connected to the controller 14 for operating the electromagnetic valve. ,It is configured.

The first electromagnetic valve 11 is constituted by an electromagnetic valve that can be opened to the atmosphere, and the second electromagnetic valve 12 is constituted by a three-way valve that switches connection to the upper and lower pipes of the measuring tank 4. The level sensor 8 is incorporated in the measuring tank 4 and includes, for example, a float 16 with a magnet and a reed switch 17 whose height can be adjusted inside the measuring tank 4.

The spray nozzle 5 is incorporated in the glass container 20 together with the insect attracting lamp 19, and the nozzle spray port faces the outside of the glass container 20. Further, as described above, the controller 14 controls the switching and opening / closing of the first electromagnetic valve 11, the second electromagnetic valve 12, and the third electromagnetic valve 13 by the time operation control function, and measures and sprays the chemical solution 3 in a predetermined manner. For this purpose, the operation is performed in response to a signal from the reed switch 17 of the level sensor 8 and a signal from the drip sensor 21 disposed at the nozzle spray port of the spray nozzle 5.

The controller 14 illuminates the insect lamp 19 to invite a pest near the insect lamp 19 and performs measurement / spraying of the chemical solution 3 at predetermined intervals by the time operation control function. As shown in FIG. 1, the controller 14 opens the first electromagnetic valve 11 to measure the chemical solution 3 so that the chemical solution 3 in the chemical solution tank 2 can be drawn into the meter tank 4, and then the second The solenoid valve 12 is switched to open the chemical liquid intake port 6 of the spray nozzle 5 to the upper space of the meter tank 4, and then the third solenoid valve 13 is opened to spray the compressed air 9 of the compressed air source 10. It sprays from the nozzle spraying opening of the nozzle 5.

Injection of compressed air 9 from the nozzle spray port of the spray nozzle 5 At this time, a negative pressure is generated in the spray nozzle 5 according to the principle of spraying, and this negative pressure is supplied into the chemical liquid tank 2 via the chemical liquid intake port 6. Therefore, the chemical liquid 3 in the chemical liquid tank 2 is drawn into the measuring tank 4 by vacuum suction and gradually increases. When the chemical liquid 3 in the measuring tank 4 reaches a predetermined measuring level, the level sensor 8 sends a signal to the controller 14. In this way, a predetermined amount of the chemical liquid 3 is supplied into the measuring tank 4 and the measuring operation of the chemical liquid 3 is finished.

After the completion of the metering operation, the controller 14 closes the first electromagnetic valve 11, disconnects the chemical tank 2 and the meter tank 4, stops the drawing of the chemical 3 into the meter tank 4, and after this time By the negative pressure generated in the spray nozzle 5, the measurable chemical solution 3 inside is pulled from the bottom of the measuring tank 4 into the spray nozzle 5, and a predetermined amount of the chemical solution 3 is sprayed from the spray nozzle of the spray nozzle 5. As a spray, exterminate the pests.

At the time of this spraying operation, the inside of the measuring tank 4 is opened to the atmosphere by the closed first electromagnetic valve 11, so that the measuring liquid in the measuring tank 4 decreases as the chemical liquid 3 in the measuring tank 4 decreases. The interior is replaced by air. The spraying of the chemical solution 3 is continued until the chemical solution 3 in the measuring tank 4 is exhausted. The progress of spraying can be detected by a change in the signal from the dropping sensor 21.

In addition, the 1st solenoid valve 11 and the 2nd solenoid valve 12 can each be comprised by combining two simple solenoid on-off valves. Such a configuration increases the number of solenoid valves and complicates the control, which is advantageous in implementing the configuration shown in FIG. 1 for the first solenoid valve 11 and the second solenoid valve 12.

The present invention can be used not only to control pests but also to spray other chemicals such as agricultural chemicals. One or more spray nozzles 5 are provided depending on the application.

It is a piping lineblock diagram of fixed-quantity spraying device 1 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Metering spray apparatus 2 Chemical liquid tank 3 Chemical liquid 4 Metering tank 5 Spray nozzle 6 Chemical liquid intake port 7 Chemical liquid intake port 8 Level sensor 9 Compressed air 10 Compressed air source 11 First electromagnetic valve 12 Second electromagnetic valve 13 3 Solenoid valve 14 Controller 15 Air filter 16 Float with magnet 17 Reed switch 18 Depressurization mechanism 19 Insect lamp 20 Glass device 21 Drip sensor

Claims (4)

The chemical tank (2) is connected to the measuring tank (4) of the sealed chemical liquid (3) by the first electromagnetic valve (11), and the upper and lower parts of the measuring tank (4) are switched to the second electromagnetic valve. (12) is connected to the two input ports, and one output port of the second solenoid valve (12) is connected to the chemical liquid intake port (6) of the spray nozzle (5) and the compressed air source (10). Is connected to the compressed air intake port (7) of the spray nozzle (5) by a third solenoid valve (13), and a level sensor (3) for detecting the measurement level of the chemical (3) at the position of the measuring tank (4). 8) is connected to the controller (14) for operating the solenoid valve,
When the chemical solution (3) is measured, the first electromagnetic valve (11) is opened, the second electromagnetic valve (12) is switched, the third electromagnetic valve (13) is opened, and the compressed air (9) is opened from the spray nozzle (5). ), The chemical liquid (3) in the chemical liquid tank (2) is drawn into the measuring tank (4) by the negative pressure generated in the spray nozzle (5), and the measuring liquid in the measuring tank (4) When the metering level of the chemical solution (3) is detected by the level sensor (8), the controller (14) closes the first solenoid valve (11) and switches the second solenoid valve (12), so that the meter tank ( 4) Stop the drawing of the chemical liquid (3) into the inside, and after this point, the negative pressure generated in the spray nozzle (5) draws the measured chemical liquid (3) into the spray nozzle (5) and sprays it. A predetermined amount of chemical (3) is ejected from the nozzle (5). Metered dose device, characterized in that it (1). The metering spray device (1) according to claim 1, wherein the metering / spraying of the chemical liquid (3) is executed at a predetermined cycle by the time operation control function of the controller (14). The metering spray device (1) according to claim 1, wherein the first solenoid valve (11) is constituted by a solenoid valve that can be opened to the atmosphere. The metering spray device (1) according to claim 1, characterized in that the second electromagnetic valve (12) is constituted by a three-way valve for switching connection to the measuring tank (4).

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