JPH0454502B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention involves transferring a medicinal solution prepared from a medicinal agent, water, etc. in a mixing tank to a spraying tank, and then force-feeding it to a nozzle by a pump means and spraying it. This invention relates to improvement of a chemical spraying device.

[Prior Art] A conventional chemical spraying device of this type, for example, as shown in FIG.
and a line e to the spray nozzle d via pump means c.
An operator inserts a chemical solution in which a chemical is mixed with water or the like in a separate mixing tank into a spraying tank a through a container f, and a pump means c
The liquid is fed under pressure to the nozzle d. Alternatively, as shown in FIGS. 7 and 8, the chemical solution is mixed in another mixing tank g, and then pumped through a jet pump h (shown in FIG. 7) or other pump means i (shown in FIG. 8).
It is also possible to have a configuration in which the water is transferred to the spraying tank a.

[Problems to be Solved by the Invention] However, when the chemical solution is inserted into the spraying tank a using the container f as shown in FIG. There are problems such as causing fatigue, and
In the case of the device shown in the figure, the jet pump h is used, which makes the device large, and the jet pump h is not used during spraying, which is uneconomical and increases manufacturing costs. In this case, other pumping means are used, resulting in problems such as a large-sized device.

[Means for Solving the Problems] This invention has been made in view of the above-mentioned circumstances, and its outline includes a pump means, a mixing tank,
A chemical spraying device comprising a spraying tank, a switching valve, and a nozzle, wherein the switching valve has 5 ports and 2 positions, and a first port of the switching valve is communicated with an inlet of the pump means, and a second port of the switching valve is connected to an inlet of the pump means. The port communicates with the mixing tank via a check valve that is opened only in the direction of the second port, the third port communicates with the spraying tank, and the fourth port communicates with the discharge port of the pump means. The spraying nozzles can be communicated with each other via a switching means, and the fifth port is communicated with the spraying tank via a check valve that is opened only in the direction of the spraying tank, and the switching valve is in the first position. The first port and the second port and the fourth port and the fifth port are connected to each other, and the third port is closed, and further, by selecting the switching means, the mixing tank is connected to the mixing tank via the pump means. The switching means is connected to a dispersion tank, and at the second position of the switching valve, the third port and the first port are communicated, and the second port, the fourth port, and the fifth port are respectively closed. By selection,
By communicating the spraying tank with the nozzle through a pump means, the drawbacks of the conventional device are overcome, and by switching the switching valve and selecting the switching means, the mixing tank is communicated with the mixing tank by the pump means. A large amount of chemical solution can be safely inserted into the spraying tank in a short period of time, and the pump means and piping used in this case can be used as is for spraying work, making it even more convenient. The objective is to provide a safe and economical chemical spraying device.

[Embodiment] An embodiment of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a schematic piping diagram showing a chemical spraying device of the present invention, and FIGS. 3 and 4 are partial cross-sectional views of the same device in similar states. A mixing tank 1 used to make a chemical solution, a spraying tank 2 used to store the chemical solution made in the mixing tank 1 before spraying, a switching valve 3 with 5 ports and 2 positions, and a pump means. A reciprocating pump 4, switching means 5a, 5b, a nozzle 6, etc. are provided. The first port 31 of the switching valve 3 is communicated with the suction port 41 of the reciprocating pump 4 through a conduit 7, and the second port 32 is provided with a check valve 8 that is opened only in the direction of this port 32. The third port 33 is connected to the mixing tank 1 through the pipe line 9, the third port 33 is connected to the spraying tank 2 via the pipe line 10, and the fourth port 34 is connected to the spraying valve 5a, which is a switching means, and the pump. The reciprocating pump 4
communicates with the discharge port 42 and the spraying nozzle 6,
The fifth port 35 is connected to the spraying tank 2 through the pipe line 14 in which a check valve 13 that opens only in the direction of the spraying tank 2 is installed, and the pipe line 10 communicating with the spraying tank 2. communicated.

The first position of the switching valve 3 is set to the state shown in FIGS. 1, 3, and 4 by rotating the spool 36, and the first port 31 and the second
Port 32, fourth port 34 and fifth port 35
are communicated with each other, and the third port 33 is closed. In addition, by closing the spraying valve 5a or the pump source valve 5b, the nozzle 6 direction is closed and the fourth port 34 and the discharge port 42 of the reciprocating pump 4 are communicated, as indicated by the arrow in the figure. As shown, the medicinal solution mixed with medicine, water, etc. in the mixing tank 1 is transferred to the pipe line 9, the second port 32, the first port 31, the pipe line 7, the reciprocating pump 4, the pipe line 11, and the fourth port. 34, fifth port 35, pipe line 14 and pipe line 1
0 to the spray tank 2. At this time, the fourth port 34 and the fifth port 35
A portion 37a having a smaller cross-sectional area than the others is formed in the passage 37 that communicates with the first port 31 and the second port 32, and a communication passage 39 that communicates with the passage 38 that communicates the first port 31 and the second port 32 is formed. It is shaped like an ejector pump (jet pump), and the suction action from the mixing tank 1 is made stronger.

As shown in FIGS. 2 and 5, the second position of the switching valve 3 is a position where the spool 36 of the switching valve 3 is rotated approximately 90 degrees from the first position, and the first port 31 and the third port 33 is connected, and the other port 3
2, 34, and 35 are each closed. Then, both valves 5a and 5b are opened, and the discharge port 42 of the reciprocating pump 4 is opened in the direction of the nozzle 6, so that the chemical solution stored in the spraying tank 2 is routed through the pipe as shown by the arrow in the figure. 10, 3rd port 33, 1st
Port 31, line 7, reciprocating pump 4 and line 11
It can be force-fed to the nozzle 6 through the nozzle 6 and sprayed from the nozzle 6.

[Effects of the Invention] As described above, the chemical liquid spraying device according to the present invention can easily transfer the chemical liquid in the mixing tank to the spraying tank using the reciprocating pump by switching the switching valve and selecting the switching means. Furthermore, since the ejector action is utilized in this case, a large amount can be transferred in a short period of time. At the time of spraying, the reciprocating pump, piping, etc. used to forcefully feed the chemical solution into the spray tank can be used as they are, so it has effects such as being more economical. More specifically, compared to the case where the reciprocating pump alone replenishes the chemical solution in the tank, the same reciprocating pump can replenish the tank with 4 to 5 times the amount of the reciprocating pump suction amount of the drug solution in the same time.

[Brief explanation of the drawing]

FIG. 1 is a schematic piping diagram showing a chemical spraying device of the present invention, FIGS. 2 and 5 are schematic piping diagrams and partial sectional views showing the device in a different state from the first diagram, and FIGS. 4 is a partial cross-sectional view of the device in the state shown in FIG. 1, FIG. 6, FIG. 7, and FIG.
The figure is a schematic piping diagram showing a conventional device. In the figure, 1... mixing tank, 2...
Spraying tank, 3... switching valve, 31... first port, 32... second port, 33... third port,
34...Fourth port, 35...Fifth port, 36
... Spool, 37, 38 ... Passage, 37a ...
Portion with small cross-sectional area, 39...Communication path, 4...
... Reciprocating pump (pump means), 41 ... Suction port,
42...Discharge port, 5a...Spraying valve (switching means), 5b...Pump source valve (switching means), 6...
... Nozzle, 7, 9, 10, 11, 14... Pipe line,
8, 13...This is a check valve.

Claims (1)

[Claims] 1. Pump means, mixing tank, spraying tank,
The chemical spraying device includes a switching valve and a nozzle, wherein the switching valve has 5 ports and 2 positions, and the first port of the switching valve communicates with the suction port of the pump means, and the second port communicates with the inlet of the pump means. It communicates with the mixing tank through a check valve that is open only in the direction of the two ports, the third port communicates with the spraying tank, and the fourth port connects with the discharge port of the pump means and the spraying nozzle. The fifth port is connected to the spraying tank via a check valve that is opened only in the direction of the spraying tank, and when the switching valve is in the first position, the first The port and the second port and the fourth port and the fifth port are communicated with each other, and the third port is closed, and further, by selecting the switching means, water is transferred from the mixing tank to the spraying tank via the pump means. and a third valve in the second position of the switching valve.
The port and the first port are communicated with each other, and the second port, the fourth port, and the fifth port are respectively closed, and further, by selecting the switching means, the spraying tank is communicated with the nozzle via the pump means. chemical spraying equipment. 2. In the first position of the switching valve, a portion having a small cross-sectional area is provided in the passage communicating the fourth port and the fifth port, and the portion having a small cross-sectional area and the first port are connected to each other. 2. A chemical solution dispersion device according to claim 1, wherein the parts are connected by a communication passage, and the part having a small cross-sectional area is shaped like an ejector pump.