JPS6365970A - Motor-driven sprayer - Google Patents

Abstract

PURPOSE:To keep the concn. of the chemical liquid in a tank constant by appropriately stirring said chemical liquid, by providing a bypass part to the outflow pipe of a chemical liquid supply pump and suspending the bypass pipe communicating with the bypass part to be bottom surface of the chemical liquid tank. CONSTITUTION:The scattering work of a chemical liquid is performed while the spraying from a nozzle is occasionally stopped by appropriately releasing the pressing of an operation button. When the spraying of the chemical liquid is stopped, the water pressure in a horizontal pipe 12a rises and, therefore, a valve body 12e rises against the spring force of a spring 12g and a valve port 12d is opened and the chemical liquid sent from a pump 8 under pressure is refluxed to a chemical liquid tank 2 through an upright pipe 12b, a reflex pipe 12c and a bypass pipe 16 to be forcibly injected toward the bottom surface of the tank 2 from the jet orifice 16a provided at the lower end of the bypass pipe 16. Since a convection is generated in the chemical liquid within the tank by the jet stream to stirr the chemical liquid, the chemical agent settled on the bottom surface of the tank is mixed and the chemical liquid is always held to predetermined concn.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an electric sprayer, and in an electric sprayer in which the sprayer is connected to a pump for supplying a chemical solution via a bypass section, By suspending a bypass pipe near the bottom of the chemical liquid tank and immersing its lower end into the chemical liquid, and forming a spout for the bypass liquid at least at the lower end of the bypass, the bypass pipe is spouted from the spout. The liquid is used to stir the chemical liquid in the chemical liquid tank.

[Conventional technology and problems]

Electric sprayers used for gardening etc. store a chemical solution mixed with a desired chemical in a chemical solution tank, suck up the chemical solution with a pump and send it to the sprayer, and direct it to flowers, trees, etc. from the nozzle at the tip of the spray rod. It is designed to be dispersed.

Examples of the above-mentioned chemicals include insecticides and drug spreading agents, but since these types of chemicals generally have a higher specific gravity than water, they gradually settle over time, and some of them settle at the bottom of the chemical solution tank. Therefore, the concentration of the chemical solution sprayed from the sprayer changes over time, which has the disadvantage that the spraying effect of the chemical solution also varies.

[Means for solving problems]

The present invention has been made in consideration of the above points, and includes a chemical liquid tank, a chemical liquid feeding pump driven by a motor, and a sprayer connected to the pump via a bypass section. In the electric sprayer, the chemical liquid is returned to the chemical liquid tank through the bypass part and the bypass pipe connected to the bypass part when spraying is stopped, and the bypass pipe is made to hang down near the bottom of the chemical liquid tank, and the lower end thereof The bypass pipe is immersed in the chemical liquid, and a bypass liquid spout is formed at least at the lower end of the bypass pipe.

(Function) By doing this, when the spraying of the chemical solution is stopped, the bypass liquid is vigorously jetted into the chemical solution from the above-mentioned spout, forcibly creating convection and stirring the chemical solution, preventing sedimentation of the drug, and also preventing the chemical solution tank from filling up. The drug that has settled on the bottom is floated to the surface and mixed into the drug solution again.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an electric sprayer according to the present invention,
This electric sprayer 1 consists of a box-shaped chemical liquid tank 2 and a cover case 3 that is detachably attached to the chemical liquid tank 2. 4 is a plywood board provided on the chemical tank 2, and a pedestal 5.6 is fixedly installed in the center of the upper surface of the pedestal 4, and a motor 7 and a motor 7 are mounted on each pedestal 5, 6, respectively.
A chemical liquid feeding pump 8 driven by is installed. Reference numeral 10 denotes a liquid supply pipe that is vertically installed in the pump 8, and its lower end extends to near the bottom of the chemical liquid tank 2, and the liquid medicine is sucked through the liquid suction port 10a opened at the lower end (see also Figure 2). (See also). Reference numeral 9 denotes a gripping opening formed in the upper part of the cover case 3; 18 denotes a power supply cord; one end of the cord 18 extends outside the cover case 3; an outlet 19 is connected to the tip; The other end is connected to the motor 7 via a switch 11 provided on the upper surface of the cover case 3.

Reference numeral 12 denotes a bypass section connected to the outflow pipe 13 of the pump 8, and the bypass section 12 has a horizontal pipe 12a attached to the outflow pipe 13 at its rear end, and a bypass section 12 that is erected above the horizontal pipe 12a. It consists of a standpipe 12b and a reflux pipe 12c branching laterally from the standpipe 12b. Each tube 12a~
12c are in communication with each other, but a valve body 13e is located in the valve hole 12d opened at the connecting portion between the horizontal pipe 12a and the vertical pipe 12b.
is installed. A cap 1 is attached to the tip of the standpipe 12b.
2f is removably screwed on, and a coil spring 1 is provided between the upper surface of the valve body 12e and the upper surface of the cap 12f.
2g is interposed, and the spring force of the spring 12g forces the valve body 12e downward, that is, toward the valve seat 12h. Also, by changing the screwing depth of the cap 12f,
The strength with which the valve body 12e is pressed against the valve seat 12h can be adjusted.

14 is a liquid supply hose connected to the tip of the horizontal pipe 12a, and the hose 14 extends outside the cover case 3.
A sprayer 15 is connected to its tip. 15a is a nozzle attached to the tip of the sprayer 15, and 15b is an operation button.When the operation button 15b is pressed, the chemical liquid is ejected from the nozzle 15a, and when the pressure is released, the chemical liquid nozzle 1
The ejection from 5a is stopped.

16 is a bypass pipe connected to the reflux pipe 12c, and the bypass pipe 16 is connected to the opening 1 formed in the base plate 4.
7 and hangs down near the bottom of the chemical liquid tank 2, and its lower end is immersed in the chemical liquid, and the bypass liquid spout 16a formed at the lower end is located directly above the bottom of the chemical liquid tank 2. ing. The lower end of the bypass pipe 16 is tapered in diameter, so the spout 16a has a small diameter, and the bypass liquid flowing down the bypass pipe 16 flows from the spout 16a to the bottom of the chemical tank 2. It erupts violently towards you.

This device has the above-mentioned configuration, and the handling operation will be explained next.

To spray a chemical, a desired chemical is mixed into water to a predetermined concentration, and a chemical is poured into the chemical tank 2, the spray rod 15 is held, and the switch 11 is turned on.

Then, the motor 7 is driven and the pump 8 starts operating, and the chemical liquid in the chemical liquid tank 2 is sucked into the liquid suction pipe 10 from the liquid suction port 10a, and then sent to the spray pipe 15 through the horizontal pipe 12a and the hose 14. and is ejected from the nozzle 15a. Then, while operating the spray rod 15, the chemical solution is sprayed onto trees and the like. The spraying work of the chemical solution is carried out by releasing the pressure on the operation button 15b as appropriate and stopping the spray from the nozzle 15a from time to time. When the spraying of the chemical solution is stopped, the internal water pressure of the horizontal pipe 12a increases, and the valve body 12e Spring 1 due to its internal water pressure
The valve hole 12d opens against the spring force of 2g, and the chemical liquid pumped from the pump 8 enters the upright pipe 12b and then the reflux pipe 12c.

It flows back into the chemical liquid tank 2 through the bypass pipe 16, and is vigorously ejected from the spout 16a at the lower end of the bypass pipe 16 toward the bottom surface of the chemical liquid tank 2.

By the way, as mentioned above, the specific gravity of this type of drug mixed into the drug solution is generally higher than water, and therefore, as time passes, the drug in the drug solution tends to gradually settle to the bottom of the drug solution tank 2. When the spraying of the chemical liquid from the nozzle 15a is stopped as shown in FIG. The drug is generated and agitated, and the drug that had been precipitated on the bottom of the drug solution tank 2 also floats up and is mixed into the drug solution. By the bypass liquid returned from the bypass pipe 16 in this way,
By appropriately stirring the chemical liquid in the chemical liquid tank 2, the concentration of the chemical liquid can be maintained at approximately a predetermined concentration, and it is possible to suppress temporal changes in the concentration of the chemical liquid sprayed from the nozzle 15a.

(Other Embodiments) FIG. 3 shows another embodiment of the present invention, with 20
is a bypass pipe connected to the bypass section 12,
It hangs down close to the bottom of the chemical liquid tank 2, and its lower end is immersed in the chemical liquid. 20a is the bypass pipe 20
This is a bypass liquid spout formed in the bypass pipe 2.
A plurality of them are formed at predetermined intervals from the approximate center to the lower end of the 0.

In such a configuration, the bypass liquid that is returned to the bypass pipe 20 when spraying from the nozzle 15a is stopped flows through each spout 2.
It sprays forcefully into the chemical solution from 0a and stirs the chemical solution, but
By forming a plurality of jet ports 20a as described above, the stirring effect can be further improved.

FIG. 4 shows still another embodiment of the present invention,
Reference numeral 30 designates a bypass pipe similar to the bypass pipe 20 shown in FIG. 3, and has a plurality of jet ports 30a formed therein. 31
is an annular float that is loosely fitted into the bypass pipe 30 so as to be movable up and down, and a somewhat long closed pipe 32 is attached to the inner peripheral surface of the float 31. The closed pipe 32 has a spout 30a.
However, the blocking pipe 32 is also the bypass pipe 3.
0, and as the level of the chemical solution rises and falls,
It moves up and down along the bypass pipe 30 together with the float 31. 33 is a protruding body attached to the lower end of the bypass pipe 30 to prevent the float 31 from being removed.

In the above configuration, when the liquid level is high and the float 31 is at position a, all of the jet ports 30a are exposed.
The bypass liquid is ejected from all the ejection ports 30a. As the chemical solution spreads and the liquid level drops slightly and the float 31 descends to position b, the upper two spout ports 30a close to the closed pipe 32.
covered and obstructed by these spouts 3
The chemical liquid is not ejected from 0a, and the bypass liquid is ejected only from the lower two ejection ports 30a immersed in the liquid, thereby stirring the chemical liquid.

When the chemical liquid dispersion further progresses and the chemical liquid in the chemical liquid tank 2 decreases, and the float 31 descends to the C position, the lower three spout ports 30a are blocked by the blocking pipe 32 and the bypass liquid cannot be spouted, but the top The spout 30a is the closed pipe 3
2, and the bypass liquid is ejected from the ejection port 30a.

FIG. 5 shows still another embodiment of the present invention,
Reference numeral 40 denotes a bypass pipe connected to the bypass section 12, and branch pipes 41 and 42 are horizontally branched into two branches and connected to the lower end of the bypass pipe immersed in the chemical solution.
．． A plurality of spout ports 43 are provided on the upper and lower surfaces of the 42, respectively.
44 is formed. In the configuration, the bypass liquid is ejected from each ejection port 43, 44, and the bypass liquid ejected from the ejection port 43 on the upper surface side is particularly effective in stirring the chemical solution, and is ejected from the ejection port 44 on the lower surface side. The bypass liquid is especially effective in floating the medicine that settles on the bottom of the medicine tank 2.

As is clear from the above examples, the shape and number of jet ports formed in the bypass pipe should be arbitrarily determined, and various shapes and structures of the bypass pipe can be considered. A bypass liquid spout is formed at least at the lower end of the bypass pipe whose lower end hangs down close to the bottom of the chemical liquid tank and is immersed in the chemical liquid, and the bypass liquid is vigorously jetted from the spout to effectively stir the chemical liquid. Just do it.

〔effect〕

As explained above, the present invention provides the following advantages:
A chemical liquid supply pump 8 driven by the pump 8
In the electric sprayer l, which has a sprayer 15 connected to via a bypass part 12, a bypass pipe 16 communicating with the bypass part 12 is suspended close to the bottom of the chemical solution tank 2, and the bypass pipe 16 is Since the bypass liquid spout 16a is formed at least at the lower end, the chemical liquid in the chemical tank 2 is transferred to the spout 16a.
The concentration of the chemical solution can be maintained at a substantially constant level by being appropriately agitated by the bypass liquid that is vigorously jetted out from a.

[BRIEF DESCRIPTION OF THE DRAWINGS] The figures show embodiments of the present invention, in which Fig. 1 is a perspective view of an electric sprayer, Fig. 2 is a side view of main parts, Fig. 3, Fig. 4, and Fig. 5. The figures are side views of essential parts of other embodiments of the present invention. DESCRIPTION OF SYMBOLS 1... Electric sprayer, 2... Chemical solution tank, 7... Motor, 8... Chemical solution feeding pump, 12... Bypass part, 15... Sprayer, 16, 20.30.40 ...
Bypass pipe, 16a, 20a, 30a, 43.44...
- Spout. Applicant Kyushu Hitachi Maxell Co., Ltd. Representative Seigo Sato

Claims (1)

[Claims] In an electric sprayer 1 having a chemical liquid tank 2, a chemical liquid feeding pump 8 driven by a motor 7, and a spray rod 15 connected to the pump 8 via a bypass part 12, a bypass connected to the bypass part 12 is provided. An electric sprayer characterized in that a pipe 16 hangs down close to the bottom surface of the chemical liquid tank 2, and a bypass liquid spout 16a is formed at least at the lower end of the bypass pipe 16.