JPH0748968B2 - Agricultural spraying equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an agricultural spraying device for disinfecting agricultural products placed in a greenhouse, and more specifically, by connecting a spraying nozzle to a chemical liquid source and an air pump,
The present invention relates to an agricultural spraying device in which a chemical liquid is sprayed by compressed air sent from the air pump.

[0002]

2. Description of the Related Art In general, the spray nozzle of this type of agricultural spraying device has a chemical liquid ejection port communicating with a chemical liquid source and a larger diameter than the chemical liquid ejection port as disclosed in Japanese Utility Model Publication No. 59-6903. An air outlet communicating with the pump is provided, and the chemical liquid outlet and the air outlet are concentric with each other, and the compressed air pressure-fed from the air pump is ejected from the air outlet, and the ejection output of the compressed air The negative pressure is applied to the chemical liquid jet by the above, and the chemical liquid is sucked from the chemical liquid source to the chemical liquid jet port and jetted from the chemical liquid jet port, and the jetted chemical liquid is rapidly expanded of the compressed air jetted from the air jet port. Is atomized and sprayed.

By the way, the atomizing device as described above is usually equipped with
A chemical solution such as an emulsion or a wettable powder is used after diluting it at a predetermined ratio. However, when a wettable powder is used, a precipitate is easily generated, and when a plurality of chemical solutions are mixed and used. , Solids are produced by chemical or physical changes,
These solids and precipitates are accumulated on the inner side of the chemical liquid ejection port, the chemical liquid ejection port is clogged, and the ejection amount of the chemical liquid is reduced. When the spray nozzle is clogged in this way, it is not possible to spray a predetermined amount of chemical liquid set according to the size of the greenhouse or the cultivation situation in the greenhouse, and the disinfecting effect becomes insufficient and pests Since there is a problem of causing the generation, a spraying device for eliminating the clogging has been proposed as disclosed in Japanese Patent Laid-Open No. 3-12251. In this conventional spraying device, a lid that closes an air ejection port of the spraying nozzle is provided on the front side of the general spraying nozzle described above, and a closed position and a spray of a chemical liquid sprayed forward from the spraying nozzle. A fluid pressure cylinder for moving the lid to a closed position and a retracted position is provided so as to be movable to a retracted position outside the region, and the fluid pressure cylinder is provided with an air supply source via a switching valve. When the spray nozzle is clogged, the fluid pressure cylinder and the switching valve are operated, the lid is moved to the closed position, the air ejection port of the spray nozzle is closed, and the spray nozzle is connected. The clogging of the spray nozzle is eliminated by causing the compressed air supplied therein to flow into the chemical liquid ejection port and discharging the compressed air from the liquid absorption passage communicating with the chemical liquid ejection port to the chemical liquid source.

[0004]

However, according to this conventional device , the lid is kept in the state of spraying the chemical liquid without stopping the spraying of the chemical liquid.
It moves your body and eliminates clogging.
This lid is located just in front of the chemical spray outlet and the spray area for the chemical.
It is possible to move to a retracted position outside the area.
Therefore, when the clogging is cleared, this lid is used to spray the chemical solution.
Do not enter the fog area and move within the spray area.
It Therefore, the liquid medicine adheres to the lid like water droplets,
There is a problem that the liquid chemical in the form of water drops may fall off.
Do not allow the lid to collide with the propellant in the position just in front of the mouth.
Therefore, the compressed air that is sprayed from this air
The problem of not being atomized and scattered in all directions and falling like a flutter
There is a problem. Also, it said lid, because you have to eliminate the clogging of the spray nozzle with a fluid pressure cylinder and the switching valve to move the lid body and a closed position and a retracted position, and the lid, the fluid pressure Cylinder and switching valve are required,
Not only is the structure complicated and the cost is high, but the size and weight of the entire device are large.

The present invention has been made in view of the above points.
The purpose is to have a simple structure without dropping the drug solution.
The clogging in the liquid ejection port can be eliminated , and the number of parts
The point is to make it possible to make a simple structure with few .

[0006]

In order to achieve the above object, the present invention comprises a chemical liquid ejection port 31 and an air ejection port 34 having a diameter larger than that of the chemical liquid ejection port 31, and these chemical liquid ejection ports 3 are provided.
1 and the air jet 34 are concentric, and pressure is applied from the air pump.
The compressed air to be sent is ejected from the air ejection port 34 ,
A negative pressure is applied to the chemical liquid outlet 31 by the output of the compressed air.
And suck the drug solution from the drug solution source to the drug solution ejection port 31.
A spray nozzle 3 formed so as to eject from the chemical solution ejection port 31.
An agricultural spraying device comprising: a spray nozzle, wherein the chemical spray nozzles are provided in front of the spray nozzles 31 and 34 of the spray nozzle 3 and at positions outside the spray region of the chemical sprayed toward the front. 31 is opened toward the air outlet 34
When the compressed air supply to the
Compressed air is injectable into the inside of this chemical liquid ejection port 31
An air injection pipe 9 for eliminating clogging inside is provided, and this air injection pipe 9 is connected to an air supply source through an opening / closing mechanism 8.

Further, the air injection pipe 9 is preferably connected to the air pressure supply pipe 6 of the air pump which pressure-compresses the compressed air to the air ejection port 34 of the spray nozzle 3.

Further, the spray nozzle 3 is provided with a chemical solution jet port 3
Nozzle body 3a having a cylindrical shape and a nozzle body 3a
Bottomed cylindrical housing 3b having a larger diameter inner cavity portion 33
From the tip of the housing 3b
1 toward the outer peripheral portion, and at the tip end thereof, the chemical liquid ejection port 31
It is formed by a lid portion 3c having a larger diameter air ejection port 34, and an air introduction port 35 penetrating in a radial direction from the inner cavity portion 33 is provided on the outer peripheral surface of the housing 3b on the bottom side thereof. Compressed air introduced into the inner cavity portion 33 from the air introduction port 35 is introduced into the cavity portion 33 by the air ejection port 34.
It is preferable to provide a revolving surface 36 for revolving in a spiral shape toward.

Further, the clogging elimination operation for shutting off the compressed air supply to the air jet port 34 and supplying the compressed air to the air jet pipe 9 and the compressed air feed to the air jet pipe 9 are cut off. Further, the opening / closing mechanism 8 is provided with an operating section that electrically performs a chemical liquid spraying operation of supplying compressed air to the air ejection port 34.
Alternatively, a timer 10 for switching the opening / closing mechanism 8 from the chemical liquid spraying operation to the clogging elimination operation at regular intervals may be used.

Further, the detection means 12 for detecting the clogging of the chemical liquid jet 31 is provided, and the compressed air supply to the air jet 34 is cut off, and the compressed air is supplied to the air jet pipe 9. An opening / closing mechanism 8 including an operation section that electrically performs a canceling operation and a chemical liquid spraying operation that shuts off the compressed air supply to the air injection pipe 9 and supplies the compressed air to the air ejection port 34; Based on the detection result of the detection means 12, the operation switching instruction means 1 for giving the opening / closing mechanism 8 an operation instruction for switching from the chemical liquid spraying operation to the clogging elimination operation.
3 and 3 may be used.

[0011]

When the chemical liquid ejection port 31 of the spray nozzle 3 is clogged, the opening / closing mechanism 8 is operated to supply compressed air from the air supply source to the air injection pipe 9, so that the air injection pipe 9 It is possible to inject compressed air toward the chemical liquid ejection port 31. Therefore, the compressed air is compressed from the air injection pipe 9 toward the chemical liquid ejection port 31 with the supply of the compressed air to the air ejection port 34 cut off. By injecting air, this compressed air can be made to invade into the chemical liquid ejection port 31, and the compressed air can return precipitates accumulated on the inner side of the chemical liquid ejection port 31 to the chemical liquid source. The clogging can be eliminated. In addition, the air injection pipe 9,
It is arranged at a position outside the spray region of the chemical liquid sprayed from the spray nozzle 3 to shut off the supply of compressed air to the air ejection port 34.
When cutting off, compressed air can enter the chemical solution outlet 31
Injection is performed to eliminate the clogging in the chemical solution outlet 31.
Therefore, at the time of clearing the clogging, the liquid chemical is put in the air injection pipe 9.
Can be prevented from sticking and the chemical liquid can be prevented from falling off.
You can Further, the air injection pipe 9 and the opening / closing mechanism 8
Since it is possible to eliminate clogging with a simple configuration that only has and
Therefore, open the lid as described above to clear the clogging.
The cost can be greatly reduced compared to the conventional example in which it was turned off.
In addition, the entire device can be made compact and lightweight.
You can do it.

Further, when the air injection pipe 9 is connected to the air pressure supply pipe 6 of the air pump for pressure-compressing the compressed air to the air ejection port 34 of the spray nozzle 3, an air pump for atomization can be used. Compressed air can be easily supplied to the air injection pipe 9 even when there is no other air supply source than the air pump for another purpose.

Further, a cylindrical nozzle body 3a having the chemical liquid ejection port 31, a bottomed cylindrical housing 3b having an inner cavity portion 33 having a diameter larger than that of the nozzle body 3a, and a tip portion of the housing 3b. To the outer peripheral portion of the chemical liquid ejection port 31 and a lid portion 3c having an air ejection port 34 having a diameter larger than that of the chemical liquid ejection port 31 at the tip thereof to form a spray nozzle 3 and the bottom side of the housing 3b. The outer peripheral surface is provided with an air inlet port 35 penetrating from the inner cavity portion 33 in the radial direction, and the compressed air introduced from the air inlet port 35 into the inner cavity portion 33 is blown into the inner cavity portion 33. When the swirl surface 36 that swirls spirally toward the outlet 34 is provided, the spread of the compressed air ejected from the air ejection port 34 can be restricted and the ejection angle can be made substantially constant. It is possible to make the spray area of the chemical liquid sprayed from the spray nozzle substantially constant, and to easily dispose the air injection pipe 9 at a position outside the spray area and on the center line of the chemical spray port 31. It is easy to inject the compressed air toward the center of the above, and by swirling as described above, the negative pressure at the chemical liquid ejection port 31 generated by the injection of the compressed air from the air ejection port 34 can be made constant. The amount of the drug solution sucked into the drug solution ejection port 31 can be made constant, and atomization of the drug solution can be equalized.

Further, the clogging elimination operation for shutting off the compressed air supply to the air ejection port 34 and supplying the compressed air to the air injection pipe 9 and the compressed air supply to the air injection pipe 9, Further, the opening / closing mechanism 8 is provided with an operating section that electrically performs a chemical liquid spraying operation of supplying compressed air to the air ejection port 34.
When the opening / closing mechanism 8 and the timer 10 for switching from the chemical liquid spraying operation to the clogging elimination operation at regular time intervals are used, compressed air can be injected from the air injection pipe 9 at regular time intervals. Further, the chemical liquid ejection port 31 can be regularly cleaned, and clogging at the chemical liquid ejection port 31 can be eliminated.

Further, the detecting means 12 for detecting the clogging of the chemical liquid jet 31 and the compressed air supply to the air jet 34 and the clogging elimination operation for supplying the compressed air to the air jet pipe 9. And an opening / closing mechanism 8 having an operation section for electrically cutting off the supply of compressed air to the air injection pipe 9 and electrically supplying a compressed air to the air ejection port 34, and the detection means. When the opening / closing mechanism 8 is provided with the operation switching instruction means 13 for giving an operation instruction for switching from the chemical liquid spraying operation to the clogging elimination operation based on the detection result of 12, when the clogging occurs, the clogging is eliminated. It is possible to detect it automatically, and it is possible to automatically and efficiently eliminate this clogging.

[0016]

EXAMPLES The agricultural spraying apparatus shown in FIG. 1 is mainly installed in a greenhouse to disinfect agricultural crops cultivated in the greenhouse, and has an air inlet (not shown) at one end, It has an air outlet 1a at the other end and a fan (not shown) inside.
A spray nozzle 3 is mounted through a nozzle case 2 having a front surface opening inside the air outlet 1a of a cylindrical casing 1 in which the spray nozzle 3 is positioned in front of the spray outlets 31 and 34 described later. However, these spouts 31, 34
An air injection pipe 9 for injecting compressed air backward is provided, and the chemical liquid in the chemical liquid tank 4 arranged below the casing 1 is sprayed from the spray nozzle 3 to reverse the compressed air from the air injection pipe 9. The jetting is adapted to eliminate the clogging at the jet outlet 31.

The spray nozzle 3 is, as shown in FIG.
A nozzle body 3a having a cylindrical shape having a narrowed portion 32 on the inner side of the chemical liquid ejection port 31 and the chemical liquid ejection port 31, and the nozzle body 3
a bottomed cylindrical housing 3 having an inner diameter 33 larger than a
b, from the tip of the housing 3b toward the outer peripheral portion of the chemical solution jet 31 and at the tip thereof, the chemical solution jet 3
1 and a lid portion 3c having an air ejection port 34 having a diameter larger than 1. The lid 3c is screwed to the outer periphery of the front end portion of the housing 3b so that the chemical liquid ejection port 31 and the air ejection port 34 are concentric. In addition, an air inlet port 35 penetrating from the inner cavity portion 33 in the radial direction is provided on the outer peripheral surface of the housing 3b on the bottom side, and as shown in FIG. A swirl surface 36 that swirls the compressed air introduced into the cavity 33 toward the air ejection port 34 in a spiral shape.
Is provided.

The nozzle body 3a is connected to the liquid suction pipe 5
Via the air inlet port 35 of the housing 3b to the air pump 7 via the air pressure feed pipe 6, and the jetting force of the compressed air jetted from the air jetting port 34 A negative pressure is applied to the chemical liquid ejection port 31, a chemical liquid is sucked from the liquid suction pipe 5 to the chemical liquid ejection port 31, and is ejected from the chemical liquid ejection port 31.
Although the outer end of the air ejection port 34 has a conical diameter, the shape is not limited to that. Further, the chemical liquid ejection port 31 may be retracted inward with respect to the outer end of the air ejection port 34, or may be slightly projected outward.

On the other hand, inside the air outlet 1a of the casing 1, below the spray nozzle 3, an opening / closing mechanism 8 consisting of a switching valve 8a having three ports is arranged, the first port of which is the air outlet. The second port of the pump 7 is communicated with the air introduction port 35 of the spray nozzle 3,
The air injection pipe 9 is attached to the port.

The air injection pipe 9 is formed, for example, in a substantially J shape, and the air injection pipe 9 is directed forward and forward with respect to the ejection ports 31 and 34 of the spray nozzle 3. Position outside the spray area
The air toward the chemical solution outlet 31,
When the compressed air supply to the ejection port 34 is cut off, the chemical liquid
Compressed air is injected into the spout 31 so that the chemical liquid
To be able to eliminate the clogging in the spout 31
Place it . Although the air injection pipe 9 is formed by bending a metal pipe, it may be formed of synthetic resin or the like.

Next, the operation of the spraying device configured as described above will be described.

For example, when disinfecting a crop cultivated in a greenhouse, when the air pump 7 is driven, compressed air pressure-fed by the air pump 7 is switched from the air pressure feed pipe 6 to a switching valve 8.
a and the air outlet 34 through the inner cavity 33 of the spray nozzle 3.
The chemical liquid jet 31 is negatively pressured by the jetting force of the compressed air, and the chemical liquid in the chemical liquid tank 4 is sucked from the liquid suction pipe 5 to the chemical liquid jet 31 to be discharged from the chemical liquid jet 31. Ejection, and the ejected chemical liquid is the air ejection port 3
The compressed air jetted out from the nozzle 4 is atomized by the rapid expansion and sprayed forward from the opening of the nozzle case 2. Then, the spray particles are diffused by the air blown from the fan and blown away.

During this spraying operation, as shown in FIG. 5, when the chemical liquid jet 31 is clogged and the chemical liquid jetting amount is reduced, and the spraying state is deteriorated or cannot be sprayed, a visual check is performed. And the switching valve 8a is switched by a manual operation, and the first port of the switching valve 8a is switched to the third port.
The air is communicated with the port, and by this switching, compressed air is supplied from the air pump 7 to the air injection pipe 9 and is injected toward the chemical liquid outlet 31. At this time, the second port of the switching valve 8a is blocked, compressed air is not supplied from the air pump 7 to the air ejection port 34, and the chemical liquid in the tank 4 is not sucked into the chemical liquid ejection port 31. The compressed air injected from the air injection pipe 9 can be made to enter the chemical solution outlet 31, and the intruded compressed air can return the sediment accumulated in the chemical solution outlet 31 to the tank 4. It is possible to eliminate clogging.

Further, since the air injection pipe 9 is arranged at a position outside the spraying area H of the chemical liquid sprayed from the spraying nozzle 3 as shown in FIG. 1, it is sprayed from the spraying nozzle 3. It is possible to prevent the chemical solution from adhering to the air injection pipe 9 to the extent that it becomes a water drop, and to prevent chemical damage due to dripping of the chemical solution.

Further, a swirl surface 36 is provided on the inner cavity portion 33 of the spray nozzle 3 so that the compressed air supplied to the inner cavity portion 33 is swirled in a spiral shape toward the air ejection port 34. Since the spread of the compressed air ejected from the air ejection port 34 can be regulated and the ejection angle can be made substantially constant, the spray area H of the chemical liquid sprayed from the spray nozzle 3 can be made substantially constant. . As a result,
At a position outside the spray area H of the air injection pipe 9,
In addition, the compressed air can be easily arranged at the center line of the chemical liquid ejection port 31, and the compressed air can be more easily ejected toward the center of the chemical liquid ejection port 31. In addition, the compressed air can be ejected by swirling as described above. Since the negative pressure at the chemical liquid ejection port 31 generated by the injection from the outlet 34 can be made constant, the amount of the chemical liquid sucked into the chemical liquid ejection port 31 can be made constant and the atomization of the chemical liquid can be made uniform.

When the chemical solution jet 31 starts to be clogged, the flow velocity of the sucked chemical solution changes and the chemical solution jet 3
Since the ejection amount from 1 becomes unstable, the air ejection port 3
Although the chemical solution easily adheres to the expanded diameter portion of 4, the adhered chemical solution can also be blown off by the compressed air from the air injection pipe 9.

After the clogging is eliminated,
The switching valve 8a is manually operated to switch the switching valve 8a.
to connect the first port of a to the second port,
By this switching, compressed air is supplied from the air pump 7 to the air ejection port 34, and the chemical liquid can be sprayed by ejecting the compressed air from the air ejection port 34. At this time, since the third port of the switching valve 8a is shut off, compressed air is not supplied to the air injection pipe 9.

In the embodiment described above, it is visually confirmed that the spraying nozzle 3 is clogged and the spraying state is deteriorated, or that the spraying is not possible, and the switching valve 8a is switched by manual operation. Although the clogging is eliminated, the switching valve 8a may be switched at other constant intervals to regularly clean the suction passage of the spray nozzle 3. That is, the opening / closing mechanism 8 shuts off the supply of compressed air to the air ejection port 34 and supplies compressed air to the air injection pipe 9, and a compressed air supply to the air injection pipe 9. And an electromagnetic switching valve provided with an operating section for electrically performing a chemical liquid spraying operation for supplying compressed air to the air jet port 34, and this electromagnetic switching valve is operated from the chemical liquid spraying operation at regular intervals. The timer 10 for switching to the clogging elimination operation is used. In this case, for example, as shown in FIG. 1, a timer unit 11 incorporating a timer 10 is provided inside the casing 1 so that the clogging elimination operation interval can be set from the outside.

As described above, when the timer 10 is used, the chemical solution ejection port 31 can be regularly cleaned and clogging of the chemical solution ejection port 31 can be prevented.

In addition to using the timer as described above,
Detection means 12 for detecting clogging of the spray nozzle 3
And an operation switching instructing means 13 for giving an operation instruction for switching from the chemical spraying operation to the clogging elimination operation to the electromagnetic switching valve based on the detection result of the detecting means 12, and the opening / closing mechanism is instructed by the instructing means 13. 8 may be switched to the clogging elimination operation.

As the detecting means 12, for example, a light reflection sensor having a light emitting element and a light receiving element is used, and the sensor is an air outlet 1a of the casing 1 as shown in FIG.
Is disposed toward the spray path of the chemical solution sprayed from the chemical solution jet 31 and the clogging is caused by the spray state, such as when the chemical solution is not jetted from the chemical jet 31 or the jet amount is small. The operation switching instructing means 13 gives an operation instruction to the electromagnetic switching valve to switch to the clogging elimination operation based on the detection result of the sensor to switch the electromagnetic switching valve.
The supply of the compressed air to the air ejection port 34 is cut off, the compressed air is supplied to the air injection pipe 9, and the compressed air is ejected from the air ejection pipe 9 toward the chemical liquid ejection port 31. The clogging as shown in FIG. 5 is eliminated. still,
The detection means 12 may be a detector such as a light transmission sensor or an infrared sensor in addition to the light reflection sensor.

The operation switching instruction means 13 is shown in FIG.
As shown in FIG. 3, a controller 13a incorporating a CPU is used, and an operation switch SW1, a stop switch SW2, a motor switch SW3 for driving the fan, and a switch S of the air pump 7 are provided on the input side of the controller 13a.
W4 is connected to the sensor of the detection means 11, and the fan motor, the air pump 7 and the electromagnetic switching valves of the switching mechanism 8 are connected to the output side of the controller 13a.

In the above construction, the detecting means 1
When the clogging is detected by 2, the switching instruction is output to the electromagnetic switching valve based on the detection result.
After the clogging elimination operation by switching the electromagnetic switching valve is completed after a predetermined time (several seconds), the presence or absence of clogging is detected again, and when the clogging remains, the clogging elimination operation is repeatedly executed. It has become so.

Then, this repeated clogging elimination operation is counted by the counter, and when the number of operations of this counter exceeds a predetermined set number, the clogging is not eliminated and the chemical liquid in the chemical liquid tank 4 is exhausted. It is determined that the air pump 7 and the fan motor are stopped because the air pump 7 and the fan motor are stopped.

Next, the operation of the spraying device equipped with the operation switching instruction means 13 will be described with reference to the flow chart shown in FIG.

In the description of FIG. 8, the switching of the electromagnetic switching valve from the spraying operation side to the clogging elimination operation side is zero.
The N operation is performed, and the switching from the clogging elimination operation side to the spray operation side is the 0FF operation.

At the time of start, first, the fan motor is started in step S1, the air-pump 7 is started in step S3 after a predetermined timing set by the timer in step S2, and the opening / closing mechanism 8 operates 0FF in step S4. Compressed air is supplied from the air pump 7 to the air ejection port 34 of the spray nozzle 3 to perform a spraying operation.

Then, in step S5, it is judged whether or not the detecting means 12 detects clogging. If the result is NO, that is, if the detecting means 12 does not detect clogging, the procedure returns to step S4. After that, the determination in step S5 is repeated, and the spraying operation is continued. If YES in step S5, that is, if clogging is detected, the opening / closing mechanism 8 is switched from the 0FF state to the 0N operation in step S6, and the air pump 7 causes the air ejection port 3 to operate.
The supply of compressed air to No. 4 is cut off, the compressed air is supplied from the air pump 7 to the air injection pipe 9, and the compressed air is injected from the air injection pipe 9 toward the chemical liquid ejection port 31. Therefore, the clogging of the chemical liquid ejection port 31 as shown in FIG. 5 can be eliminated.

Next, after several seconds set by the timer in step S7, the opening / closing mechanism 8 is switched from 0N state to 0FF operation in step S8.
The supply of compressed air from the air pump 7 to the air injection pipe 9 is cut off, and the air ejection port 34 from the air pump 7 is cut off.
Compressed air is supplied to the spraying work and the spraying work is started, and the number of operations i of the opening / closing mechanism 8 is counted in step S9.

Then, in step S10, it is judged again whether or not the detection means 12 has detected clogging.
If the clogging is not detected, that is, if the clogging can be eliminated by injecting compressed air from the air injection pipe 9 to the chemical liquid outlet 31 of the spray nozzle 3 by the operation of the opening / closing mechanism 8, the opening / closing operation is performed in step S11. The number of operations i of the mechanism 8 is reset, the process returns to step S4, the spraying work is continuously performed, and the above-described control of steps S5 to S10 is performed. Therefore, since the spraying work can be continued while automatically eliminating the clogging in the spraying nozzle 3, the spraying work can be performed until the chemical liquid in the chemical liquid tank 4 is exhausted.

If the result of step S10 is NO, that is, if clogging is detected, step S1 is performed.
In 2, the switching operation number i of the opening / closing mechanism 8 is compared with a preset target number N.

In this comparison, if the operation number i is less than the set number N, the process returns to step S6, and the operation number is added once in step S9 where the control of steps S6 to S8 is repeated as described above. It On the other hand, in the comparison in step S12,
When the operation number i of the opening / closing mechanism 8 is performed N times or more, that is, the setting number of times or more, that is, the chemical liquid cannot be sprayed from the spray nozzle 3 even if the opening / closing mechanism 8 is repeatedly switched, and clogging is detected. If it is repeated, it is determined that the abnormal state in which the clogging is not eliminated or the state where the chemical liquid in the chemical liquid tank 4 is exhausted, the driving of the air pump 7 is stopped in step S13, and the timer is set in step S14. Step S15 after predetermined timing
Then, the drive of the fan motor is stopped, and the spraying work is completed.

With the above configuration, when the chemical spraying operation is performed in the greenhouse by the automatic unmanned system, when the spray nozzle 3 is clogged, the predetermined chemical amount within the predetermined time is sprayed. However, even if the worker knows that the above-mentioned clogging has occurred, the disinfection effect is insufficient and the disinfection effect is insufficient. From the viewpoint of safety, an operator cannot enter the greenhouse and perform maintenance until a certain time has elapsed after the end of the above procedure, but the detection means 12 causes the chemical liquid ejection port 31
In the case of automatically detecting the clogging, the clogging can be automatically eliminated by the compressed air injection from the air injection pipe 9.

Although one air injection pipe 9 is provided in the embodiment described above, a plurality of air injection pipes 9 may be provided. In this case, for example, above and below the spray nozzle 3,
Alternatively, it can be provided on the left and right sides.

Further, in the above description, the opening / closing mechanism 8 consisting of one switching valve 8a is interposed in the air pressure feeding pipe 6 of the air pump 7 which pressure feeds the compressed air to the air ejection port 34. A branch pipe communicating with the air injection pipe 9 may be provided in the air pressure feeding pipe 6 of No. 7, and an opening / closing mechanism 8 including an opening / closing valve may be provided in the branch pipe and the air pressure feeding pipe 6. The air injection pipe 9 is connected to an air pressure supply pipe of an air supply source provided separately from the air pump 7, and the air pump 7 and the air pressure supply pipe of the air supply source are provided with opening / closing mechanisms each including an opening / closing valve. Good. Further, in this case, the air pressure feeding pipe 6 of the air pump 7 is not provided with an on-off valve, but only the air pressure feeding pipe of the air supply source is provided with an on-off valve, and this on-off valve is operated to operate the compressed air from the air injection pipe 9. When injecting, the drive of the air pump 7 may be stopped to shut off the pressure feed of the compressed air to the air ejection port 34.

[0046]

As described above , according to the agricultural spraying device of the present invention, the compressed air is supplied to the air ejection port 34.
And then inject compressed air from the air injection pipe 9 in the front
That is, whether the chemical solution jet 31 and the air jet 34 are
The medicine and compressed air should not be ejected from the
Is the air injection pipe 9 arranged at a position outside the spray area of the liquid?
To inject compressed air into the chemical solution outlet 31
Is it possible to eliminate the clogging in the chemical solution outlet 31?
When the clogging is cleared, the chemical liquid adheres to the air injection pipe 9.
Can be prevented, and the dripping of chemical liquid can be eliminated.
Of. Moreover, the air injection pipe 9 and the opening / closing mechanism 8 are provided.
Is it possible to eliminate the clogging with a simple structure that only requires
Then, open and close the lid as described above to eliminate clogging.
The cost can be greatly reduced compared to the conventional example.
In addition, the entire device can be made compact and lightweight.
It is.

When the air injection pipe 9 is connected to the air pumping pipe 6 of the air pump for sending compressed air to the air ejection port 34 of the spray nozzle 3, an air pump for spraying can be used. Compressed air can be easily supplied to the air injection pipe 9 even when there is no other air supply source than the air pump for another purpose.

Further, a cylindrical nozzle body 3a having the chemical liquid ejection port 31, a bottomed cylindrical housing 3b having an inner cavity portion 33 having a diameter larger than that of the nozzle body 3a, and a tip portion of the housing 3b. To the outer peripheral portion of the chemical liquid ejection port 31 and a lid portion 3c having an air ejection port 34 having a diameter larger than that of the chemical liquid ejection port 31 at the tip thereof to form a spray nozzle 3 and the bottom side of the housing 3b. The outer peripheral surface is provided with an air inlet port 35 penetrating from the inner cavity portion 33 in the radial direction, and the compressed air introduced from the air inlet port 35 into the inner cavity portion 33 is blown into the inner cavity portion 33. When the swirl surface 36 that swirls spirally toward the outlet 34 is provided, the spread of the compressed air ejected from the air ejection port 34 can be restricted and the ejection angle can be made substantially constant. It is possible to make the spray area of the chemical liquid sprayed from the spray nozzle substantially constant, and to easily dispose the air injection pipe 9 at a position outside the spray area and on the center line of the chemical spray port 31. It is easy to inject the compressed air toward the center of the above, and by swirling as described above, the negative pressure at the chemical liquid ejection port 31 generated by the injection of the compressed air from the air ejection port 34 can be made constant. The amount of the drug solution sucked into the drug solution ejection port 31 can be made constant, and atomization of the drug solution can be equalized.

The compressed air supply to the air ejection port 34 is cut off, and the clogging elimination operation for supplying the compressed air to the air injection pipe 9 and the compressed air supply to the air injection pipe 9 are cut off. Further, the opening / closing mechanism 8 is provided with an operating section that electrically performs a chemical liquid spraying operation of supplying compressed air to the air ejection port 34.
When the opening / closing mechanism 8 and the timer 10 for switching from the chemical liquid spraying operation to the clogging elimination operation at regular time intervals are used, compressed air can be injected from the air injection pipe 9 at regular time intervals. Further, the chemical liquid ejection port 31 can be regularly cleaned, and clogging at the chemical liquid ejection port 31 can be eliminated.

The detecting means 12 for detecting the clogging of the chemical liquid jet 31 and the compressed air supply to the air jet 34 and the clogging elimination operation for supplying the compressed air to the air jet pipe 9. And an opening / closing mechanism 8 having an operation section for electrically cutting off the supply of compressed air to the air injection pipe 9 and electrically supplying a compressed air to the air ejection port 34, and the detection means. When the opening / closing mechanism 8 is provided with the operation switching instruction means 13 for giving an operation instruction for switching from the chemical liquid spraying operation to the clogging elimination operation based on the detection result of 12, when the clogging occurs, the clogging is eliminated. It is possible to detect it automatically, and it is possible to automatically and efficiently eliminate this clogging.

[Brief description of drawings]

FIG. 1 is a partial sectional view in which a part of a spraying device of the present invention is omitted.

FIG. 2 is a sectional view of a spray nozzle.

FIG. 3 is a perspective view in which a part of the spray nozzle is omitted.

FIG. 4 is an explanatory diagram for clearing clogging.

FIG. 5 is an explanatory diagram when clogging occurs.

FIG. 6 is a partial cross-sectional view showing an example in which an operation switching instruction means is provided.

FIG. 7 is a control block diagram of the same.

FIG. 8 is a flowchart of the same.

[Explanation of symbols]

 3 Spray Nozzle 3a Nozzle Main Body 3b Housing 3c Lid 31 Chemical Solution Jet 33 Lumen 34 Air Jet 36 Swirling Surface 7 Air Pump 8 Opening / Closing Mechanism 9 Air Jet 10 Timer 12 Detecting Means 13 Operation Switching Instructing Means

Claims (5)

[Claims] 1. A chemical jet (31) and the chemical jet (3).
1) An air ejection port (34) having a larger diameter than the above is provided, and the chemical liquid ejection port (31) and the air ejection port (34) are concentric with each other, and compressed air pressure-fed from an air pump is supplied to the air ejection port. (34) is ejected, and by the ejection force of this compressed air
A negative pressure is applied to the chemical solution jet port (31), and the chemical solution is supplied from the chemical solution source.
The chemical liquid is sucked into the liquid jet port (31) and the chemical liquid jet port (3
1) An agricultural spraying device having a spray nozzle (3) ejected from the spray nozzle (3), the spray nozzle (3) being forward and forward of each of the jet outlets (31) (34). The air jet is opened at a position outside the spray area of the chemical liquid to be sprayed, toward the chemical liquid outlet (31).
When interrupting the compressed air supply to the mouth (34), the penetrated capable injects compressed air into the chemical spout (31) in
An air injection pipe (9) for eliminating clogging in the chemical liquid ejection port (31) is provided, and the air injection pipe (9) is connected to an air supply source through an opening / closing mechanism (8). Agricultural spray device. 2. The air jet pipe (9) is connected to an air pump pipe (6) of an air pump for sending compressed air to the air jet port (34) of the spray nozzle (3). Agricultural spray device. 3. A spray nozzle (3) is provided with a chemical liquid ejection port (31).
A cylindrical nozzle body (3a) having a bottom, a bottomed cylindrical housing (3b) having an inner diameter part (33) having a diameter larger than that of the nozzle body (3a), and a tip part of this housing (3b) To the outer peripheral portion of the chemical liquid ejection port (31) and a lid portion (3c) having an air ejection port (34) having a diameter larger than that of the chemical liquid ejection port (31) at its tip, and the housing (3b). ) Is provided with an air introduction port (35) radially penetrating from the inner cavity portion (33) on the bottom side outer peripheral surface thereof, and the inner cavity portion (33) is formed from the air introduction port (35) to the inner cavity portion. A swirling surface (3) for spirally swirling the compressed air introduced into the portion (33) toward the air ejection port (34).
6. The agricultural spraying device according to claim 1, which is provided with 6). 4. An opening / closing mechanism (8) shuts off the supply of compressed air to an air ejection port (34) and supplies compressed air to an air injection pipe (9), and an operation for eliminating the clogging. The opening / closing mechanism (8) is fixed while the operation unit for electrically shutting off the compressed air supply to the pipe (9) and electrically performing the chemical liquid spraying operation for supplying the compressed air to the air ejection port (34) is provided. The agricultural spraying device according to claim 1, further comprising a timer (10) for switching from the chemical liquid spraying operation to the clogging elimination operation every time. 5. A detection means (12) for detecting clogging of a chemical liquid ejection port (31) is provided, and an opening / closing mechanism (8) shuts off compressed air supply to the air ejection port (34), The operation for eliminating the clogging for supplying compressed air to the injection pipe (9) and the supply of compressed air to the air injection pipe (9) are shut off, and
The opening / closing mechanism (8) is provided with an operating section for electrically performing a chemical liquid spraying operation for supplying compressed air to the air ejection port (34), and based on the detection result of the detection means (12).
The agricultural spraying apparatus according to claim 1, further comprising operation switching instructing means (13) for giving an operation instruction to switch from the chemical liquid spraying operation to the clogging elimination operation.