JP3877045B2 - Electrostatic application spreader - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a static electricity application type sprayer that imparts an electric charge to a sprayed chemical solution such as an agricultural chemical so that the chemical solution can sufficiently adhere to a cultivated plant or the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an electrostatic application spreader including an electrostatic application electrode for applying an electric charge to spray from the spray nozzle is provided in front of the spray nozzle. According to the electrostatic application type sprayer, since the electric charge is applied to the spray from the spray nozzle, the adherence to crops having a polarity opposite to that of the spray particles such as a chemical solution is improved. Certainty can be increased.
[0003]
In the conventional electrostatic application spreader, spray control from the spray nozzle, and control of power supply to the electrostatic application electrode, a cock as a spray control operation member, and an electric switch, respectively It came to operate independently.
[0004]
[Problems to be solved by the invention]
However, according to the conventional configuration, the switching operation of the cock and the switching operation of the electric switch have to be performed separately, so that the operability is poor. In addition, forgetting to perform the switching operation of the electric switch that should be performed in response to the switching operation of the cock, no electric charge is applied to the spray particles, or power supply to the electrostatic application electrode continues even after spraying is stopped. There were also problems such as being uneconomical and unexpected accidents due to electric shock.
[0005]
The present invention has been made in view of the circumstances as described above, and can perform control of spraying from the spray nozzle and control of power supply to the electrostatic application electrode with a single operation. In addition, the present invention intends to provide an electrostatic application type spreader that is free from the harmful effects caused by forgetting to switch the electric switch.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problem, the electrostatic application type sprayer according to the present invention described in claim 1 is an electrostatic application type sprayer that applies the electric charge from the electrostatic application electrode to the spray from the spray nozzle and performs the spraying. And an interlock switch that automatically controls power supply to the electrostatic application electrode in conjunction with operation of a spray control member that controls spray from the spray nozzle.
[0007]
In the electrostatic application spreader, when the spray control member is operated in order to control the spray from the spray nozzle, the interlock switch is operated in conjunction with this operation to supply power to the electrostatic application electrode. Is also automatically controlled. As described above, according to the present invention, the power supply to the electrostatic application electrode is also controlled in conjunction with the spray control operation from the spray nozzle. Therefore, it is necessary to perform these operations separately as in the past. Disappears. Therefore, the operability is improved, and there is an effect that there is no adverse effect caused by forgetting to perform the power supply control operation to the electrostatic application electrode as in the conventional case.
[0008]
According to a second aspect of the present invention, there is provided an electrostatic application spreader according to the first aspect of the present invention, wherein the spray nozzle and the electrostatic application electrode are associated with each other and a plurality of sets are provided. The interlocking switch is provided corresponding to each of the application electrodes, and each of the interlocking switches automatically supplies power to the electrostatic application electrode corresponding to the spray nozzle whose spraying is controlled by operation of the spray control member. It is something that is controlled to
[0009]
In this case, among the plurality of spray nozzles, only the power supply to the electrostatic application electrode corresponding to the nozzle whose spray is controlled by the operation of the spray control member is controlled by the interlock switch corresponding to the electrostatic application electrode. Automatically controlled. Thus, for example, if spraying from a nozzle that does not require spraying is stopped from among the plurality of spray nozzles, only power supply to the electrostatic application electrode corresponding to the nozzle is automatically stopped. It becomes. That is, if necessary, the number of spray nozzles involved in spraying can be changed, and even in that case, there is no need to separately perform power supply control operations to the plurality of electrostatically applied electrodes, and the operability is improved. There is.
[0010]
According to a third aspect of the present invention, there is provided an electrostatic application spreader according to the first aspect of the present invention, wherein the spray nozzle and the electrostatic application electrode are associated with each other in plural, The spray control member is provided corresponding to each, the interlock switch is provided corresponding to each of the spray control members, and the electrostatic application electrode is provided corresponding to each of the interlock switches.
[0011]
In this case, when one of the spray control members is operated, the spray from the spray nozzle corresponding thereto is controlled, and the corresponding interlocking switch is activated, and the electrostatic switch corresponding to the interlocking switch is operated. The power supply to the application electrode is automatically controlled.
[0012]
According to a fourth aspect of the present invention, there is provided the electrostatic application type sprayer according to the first, second, or third aspect, wherein the interlocking switch is provided with the electrostatic application according to the spray pressure from the spray nozzle. It is a pressure switch that automatically controls the power supply to the electrodes.
[0013]
That is, as the interlocking switch, for example, a contact type switch is employed, which contacts a cock lever that is turned to switch a cock as an example of the spray control member, and opens and closes the contact. However, if the pressure switch is used as in the case of claim 4, the wiring can be managed rationally, and spraying from the spray nozzle can be performed. It is also possible to easily stop the power supply to the electrostatic application electrode at an appropriate timing before it completely stops, which is preferable.
[0014]
The electrostatic application type sprayer according to the present invention as set forth in claim 5 is the electrostatic application type sprayer that applies the electric charge from the electrostatic application electrode to the chemical liquid sprayed from the spray nozzle and performs the spraying. A pressure switch that detects that the pressure of the chemical solution supplied to the nozzle has dropped below a set value and shuts off the power supply to the electrostatic application electrode is provided.
[0015]
In this case, when the pressure of the chemical solution supplied to the spray nozzle falls below a set value, the pressure switch is activated to automatically shut off the power supply to the electrostatic application electrode. For this reason, there is no problem that only the power supply to the electrostatic application electrode is sustained when the spraying operation of the chemical solution is temporarily interrupted.
[0016]
The electrostatic application spreader according to a sixth aspect of the present invention is the main cock according to the fifth aspect, wherein the pressure switch is interposed in a pipe from the chemical solution supply pump to the spray nozzle. The pressure of the chemical liquid supplied from the chemical liquid supply pump through the main cock is detected on the downstream side. In this way, when the supply pressure of the chemical liquid to the spray nozzle becomes a set level or less, the power supply to the electrostatic application electrode can be stopped by a single pressure switch, which is preferable.
[0017]
The electrostatic application spreader according to the present invention described in claim 7 is the electrostatic applicator according to claim 6, wherein the main cock has a single inlet connected to a pipe from the chemical liquid supply pump, One outlet is connected to a pipe leading to the injection nozzle, and the other outlet is a three-way cock connected to a pipe leading to the chemical liquid tank. This is more preferable because the supply pressure of the chemical liquid to the spray nozzle can be adjusted to the optimum value while controlling the return amount of the chemical liquid to the chemical liquid tank.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.
[0019]
FIG. 1 is a system diagram showing a hydraulic system and an electrical system of the electrostatic application spreader according to the first embodiment of the present invention.
[0020]
In the electrostatic application spreader S1 shown in FIG. 1, the hydraulic system includes a chemical tank 2 for storing a chemical liquid 1 such as an agrochemical, and a chemical supply pump 4 for inhaling the chemical liquid from the chemical tank 2 through an intake pipe 3. A three-way cock 6 as a main cock that supplies the chemical pressurized by the pump 4 to a plurality of spray nozzles 5 arranged along the length direction of one light alloy spraying boom 22; It is equipped with. The three-way cock 6 acts as a spray control member that controls spray from the spray nozzle 5.
[0021]
A single inlet 6 a of the three-way cock 6 is connected to the pump 4 via a discharge pipe 7. One outlet 6b of the three-way cock 6 is arranged along the spray pipe 13, the hose 9 connected to the spray pipe 13, and the one spraying boom 22 connected to the hose 9. It is connected to each spray nozzle 5 via a nozzle pipe 10 made of a provided metal pipe or the like. Further, the other outlet 6 c of the three-way cock 6 is led into the chemical liquid tank 2 through a return pipe 8. The three-way cock 6 operates such that when the one outlet 6b is opened, the other outlet 6c is closed.
[0022]
Further, a pressure regulating valve 11 that is opened between the pump 4 and the return pipe 8 when the discharge pressure of the pump 4 exceeds a set value is interposed. In FIG. 1, reference numeral 12 denotes a strainer that is provided at an end of the suction pipe 3 connected to the pump 4 and filters dust and the like mixed in the chemical solution 1.
[0023]
On the other hand, the electric system includes a battery 14 as a DC power source that is convenient to carry, a main power switch 15 connected to the battery 14, a pressure switch 16 connected in series to the main power switch 15, and the main power switch 15. Corresponding to each of the booster circuit 17 connected to the battery 14 via the power switch 15 and the pressure switch 16, and connected to the output side of the booster circuit 17 via the high voltage cable 18 and the spray nozzle 5. And an electrostatic application electrode 19 arranged at least.
[0024]
Here, the pressure switch 16 acts as an interlocking switch that automatically controls power supply to the electrostatic application electrode 19 in conjunction with the switching operation of the three-way cock 6. That is, the pressure switch 16 operates by introducing the pressure on the one outlet 6b side of the three-way cock 6, that is, the pressure at the connecting portion between the hose 9 and the spray pipe 13 in FIG. The pressure switch 16 closes (ON) when the pressure of the chemical solution 1 rises on the one outlet 6b side of the three-way cock 6 and reaches a set level, and opens below this set level (OFF). It works as follows. In the electric circuit, when both the main power switch 15 and the pressure switch 16 are turned on, a high voltage boosted by the booster circuit 17 is applied to the electrostatic application electrode 19.
[0025]
FIG. 2 shows an example of a related structure between the spray nozzle 5 and the electrostatic application electrode 19. In the same figure, the spray nozzle 5 and the electrostatic application electrode 19 are fixed to the mounting plate 21 as a set, and are arranged adjacent to each other. Thereby, with respect to the chemical | medical solution injected from the said spray nozzle 5, the electric charge can be efficiently provided to the atomized chemical | medical solution with the high voltage which the said electrostatic provision electrode 19 generate | occur | produces. In addition, the said electrostatic provision electrode 19 makes the form which the front-end | tip of the electrode rod 19b protruded slightly from the front-end | tip part of the electrode holder 19a which consists of an insulating material, and is made into the form which a human body cannot touch as much as possible. Further, the electrode rod 19b faces the side of the chemical spray sprayed from the spray nozzle 5 in a state where it can be easily drained by the oblique cut surface 19c of the electrode holder 19a.
[0026]
Next, the operation will be described. When spraying a chemical using the electrostatic application spreader S1 according to the present embodiment, first, a power source such as a motor or an engine (not shown) is driven to operate the pump 4, The main power switch 15 is turned on. By the operation of the pump 4, the chemical liquid 1 in the chemical liquid tank 2 passes through the suction pipe 3, the pump 4, the discharge pipe 7, the other outlet 6 c of the three-way cock 6, and the return pipe 8. , Returned to the chemical solution tank 2.
[0027]
Next, at the timing when the discharge pressure of the pump 4 seems to be stable, the three-way cock 6 is switched, and the one outlet 6b of the three-way cock 6 is opened. As a result, the chemical solution 1 discharged from the pump 4 is simultaneously supplied to all the spray nozzles 5 through the spray pipe 13, the hose 9 and the nozzle pipe 10, and is supplied from the plurality of spray nozzles 5. The chemical is injected.
[0028]
The pressure switch 16 monitors the pressure on the one outlet 6b side of the three-way cock 6, and when this pressure exceeds a set value, that is, when the spray pressure reaches a predetermined value, an appropriate spraying of the chemical solution is performed. Is first closed and turned on. As a result, the power of the battery 14 is supplied to the booster circuit 17 via the main power switch 15 and the pressure switch 16, and a DC high voltage of about 10 kV boosted by the booster circuit 17 is supplied to each of the static voltages. Applied to the electricity applying electrode 19. The electric charge generated by each of the electrostatic application electrodes 19 is applied to a chemical solution sprayed from each of the spray nozzles 5 corresponding to each of the electrostatic application electrodes 19, and this spray chemical solution is effective for cultivated plants such as vegetables. Will adhere. Thereby, the extermination and sterilization of the pest attached to the cultivated plant can be reliably performed.
[0029]
On the other hand, in order to temporarily stop the spraying of the chemical liquid, when the three-way cock 6 is switched in the direction of the return pipe 8 and the supply of the chemical liquid 1 to the spray nozzle 5 is stopped, the three-way In conjunction with the switching operation of the cock 6, the pressure on the one outlet 6b side of the three-way cock 6, that is, the pressure in the spray pipe 13 decreases. When this pressure falls below a set value, the pressure switch 16 monitoring this pressure is automatically opened and turned OFF, and the power supply from the battery 14 to the booster circuit 17 is cut off. For this reason, application of a high voltage from the booster circuit 17 to the electrostatic application electrode 19 is automatically cut off.
[0030]
As described above, according to the electrostatic application type spreader S1, the operator does not need to separately perform an operation for opening and closing the electric circuit when the three-way cock 6 is switched.
[0031]
In addition, since the electric circuit is never forgotten to open and close, the spraying operation may be mistakenly performed without applying electric charges to the spray particles, or conversely, the electrostatic operation may be performed while spraying is stopped. There is no case where only the supply of power to the application electrode is sustained. Therefore, the spraying operation can be performed reliably, and there are effects such as good economic efficiency and high safety.
[0032]
Further, by adopting a pressure switch as the interlocking switch, the supply of electric power to the electrostatic application electrode 19 is automatically cut off in accordance with a decrease in the spray pressure from the spray nozzle 5, so that the electrostatic application It is also possible to minimize the wetness of the electrode 5.
[0033]
As the interlock switch, in addition to the pressure switch, other types of switches such as an inexpensive contact type switch can also be employed. In this case, for example, the contact-type switch is disposed close to a cock lever 6d as a switching operation member of the three-way cock 6, and the cock lever 6d is moved in a direction to start spraying from the spray nozzle 5. By rotating, the cock lever 6d comes into contact with the contact-type switch so that the switch is automatically turned on, and the cock lever 6 is stopped in the direction to stop spraying from the spray nozzle 5. By rotating 6d, the cock lever 6d is separated from the contact-type switch so that the switch is automatically turned off.
[0034]
Next, another embodiment of the present invention will be described with reference to FIG.
[0035]
FIG. 3 is a system diagram showing a hydraulic system and an electrical system of the electrostatic application spreader according to the second embodiment of the present invention. In the figure, the same or equivalent elements as those in the electrostatic application spreader S1 according to the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
[0036]
The electrostatic application spreader S2 according to the second embodiment includes a plurality of groups (two groups and three groups in the example of FIG. 3) of the spray nozzle 5 and the electrostatic application electrode 19 similar to the above. The present invention is applied to a spreader in which a group that performs spraying and a group that does not perform spraying can be arbitrarily selected from the plurality of groups of spray nozzles 5.
[0037]
In other words, the electrostatic application spreader S2 according to the present embodiment includes a plurality of (three in the example of FIG. 3) spraying booms 22, 22, 22 that are relatively telescopic or foldable with respect to each other. The mutually corresponding combinations of the spray nozzle 5 and the electrostatic application electrode 19 form a group along the length direction of the nozzle pipes 10 respectively disposed along the two spraying booms 22, 22, 22. Arranged. If necessary, spraying from the spray nozzle 5 group of the nozzle pipe 10 of the spraying boom 22 that is not required to be sprayed, which is so-called stoppage, can be stopped and linked to the spray stop operation. Thus, only the power supply to the electrostatic application electrode 19 group corresponding to the spray nozzle 5 group in which the spraying is stopped is automatically stopped.
[0038]
In the hydraulic system in FIG. 3, one outlet 6b of the three-way cock 6 similar to that in the first embodiment has three outlet control members connected in parallel to the one outlet 6b. The nozzle pipes 10, 10, 10 communicate with each other via the opening / closing cocks 30, 30, 30. That is, the same spray pipe 13 is connected to the one outlet 6 b of the three-way cock 6, and the spray pipe 13 is branched into three corresponding to the number of the nozzle pipes 10. . Each branch pipe 31 communicates with each nozzle pipe 10 via the opening / closing cock 30 and the hose 9.
[0039]
On the other hand, the electric system in FIG. 3 is connected in parallel to the battery 14 similar to the first embodiment, the main power switch 15 connected to the battery 14, and the main power switch 15. The three pressure switches 16, 16, 16 are disposed corresponding to the pressure switches 16, 16, 16, respectively, and are connected to the main power switch 15 and the pressure switches 16, 16, 16 through the main power switch 15. The booster circuits 17, 17, and 17 connected to the battery 14 are connected to the output side of the booster circuits 17, 17, and 17 via the high voltage cable 18 and are arranged corresponding to the spray nozzles 5 respectively. The electrostatic application electrode 19 provided.
[0040]
In the present embodiment, the pressure switches 16, 16, 16 automatically supply power to the electrostatic application electrodes 19 of the groups in conjunction with opening / closing operations of the opening / closing cocks 30, 30, 30. Acts as an interlocking switch to control automatically. That is, the pressure switches 16, 16, 16 monitor the pressure downstream of the open / close cocks 30, 30, 30, and the chemical solution 1 is downstream of the open / close cocks 30, 30, 30. When the pressure rises and reaches a set value, it is closed (ON), and below this set value, it opens (OFF). In the electric circuit, when the main power switch 15 is in an ON state, the electrostatic application electrode 19 group corresponding to the pressure switch 16 that is turned ON is supplied with a high voltage from each of the booster circuits 17, 17, 17. Is applied.
[0041]
In the above configuration, when the three-way cock 6 is switched to the spray side and all of the opening / closing cocks 30, 30, 30 are opened, the spray nozzle 5 group of all the nozzle pipes 10, 10, 10 is opened. When spraying is started and the hydraulic pressure on the downstream side of the open / close cocks 30, 30, 30 exceeds a predetermined value, the pressure switches 16, 16, 16 are turned on, and all the spray nozzles 5 are turned on. A high voltage is applied to the corresponding electrostatic application electrode 19. Thereby, an electric charge is given to the spray from the spray nozzle 5 and adhesion of spray particles to the cultivated crop is improved.
[0042]
Here, for example, in order to stop spraying from the spray nozzle 5 group corresponding to one of the spraying booms 22, 22, 22 due to reasons such as narrowing the spray width, the spray nozzle 5 group corresponds. When the opening / closing cock 30 is closed, the pressure switch 16 corresponding to the opening / closing cock 30 is turned OFF when the hydraulic pressure downstream of the opening / closing cock 30 becomes a predetermined value or less. The power supply to the static electricity applying electrode 19 group corresponding to the pressure switch 16 is stopped. Therefore, the operability is good and there is no room for occurrence of a situation in which only the power supply for applying the electric charge is continued even though the spraying is stopped.
[0043]
Needless to say, as in the case of the first embodiment, a contact-type switch or the like can be adopted as the interlock switch instead of the pressure switch. In this case, the opening / closing operation lever 32 as an operation member of each of the cocks 30, 30, 30 is brought into contact with each of the opening / closing cocks 30, 30, 30 so that the contact is opened / closed. A contact switch may be provided.
[0044]
Further, as in the first and second embodiments, when the pressure switch 16 is used as the interlocking switch, the pressure switch 16 is incorporated into the booster circuit 17 disposed close to the electrostatic application electrode 19. Can be rationally arranged, and the wiring can be appropriately handled.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a system diagram showing an electrostatic application spreader according to a first embodiment of the present invention.
2 is a view showing a related structure of a spray nozzle and an electrostatic application electrode in FIG. 1. FIG.
FIG. 3 is a system diagram showing an electrostatic application spreader according to a second embodiment of the present invention.
[Explanation of symbols]
4 Chemical liquid supply pump 5 Spray nozzle 6 Three-way cock (main cock, spray control member)
6a Main cock inlet 6b Main cock one outlet 6c Main cock other outlet 7 Discharge pipe 8 Return pipe 9 Hose (pipe)
10 Nozzle piping 13 Spraying piping 16 Pressure switch (interlocking switch)
19 Electrostatic application electrode 30 Opening / closing cock (spray control member)
S1, S2 Electrostatic application spreader

Claims (7)

An electrostatic application type sprayer (S1, S2) that applies a charge from an electrostatic application electrode (19) to a spray from the spray nozzle (5) and sprays the spray from the spray nozzle (5). An electrostatic application spray comprising an interlocking switch (16) that automatically controls power supply to the electrostatic application electrode (19) in conjunction with the operation of the spray control member (6, 30) for controlling Machine. The spray nozzle (5) and the electrostatic application electrode (19) correspond to each other and include a plurality of sets, and the interlocking switch (16) corresponds to each of the electrostatic application electrodes (19), Each interlock switch (16) automatically controls power supply to the electrostatic application electrode (19) corresponding to the spray nozzle (5) whose spray is controlled by operation of the spray control member (30). The electrostatic applicator according to claim 1, which is a thing. A plurality of sets of the spray nozzle (5) and the electrostatic application electrode (19) are provided so as to correspond to each other, and the spray control member (30) is provided corresponding to each of the spray nozzles (5). 2. The interlock switch (16) corresponding to each of the members (30), and the electrostatic application electrode (19) corresponding to each of the interlock switches (16). Electrostatic application spreader. The said interlocking switch is a pressure switch (16) which controls automatically the electric power supply to the said electrostatic provision electrode (19) according to the spray pressure from the said spray nozzle (5). 3. The electrostatic spraying device according to 3. In the electrostatic application type sprayer (S1, S2) for applying the spray from the electrostatic application electrode (19) to the chemical sprayed from the spray nozzle (5), the chemical liquid is supplied to the spray nozzle (5). An electrostatic application type sprayer comprising a pressure switch (16) for detecting that the pressure of the chemical liquid has dropped below a set value and shutting off the power supply to the electrostatic application electrode (19). . The pressure switch (16) is located downstream of the main cock (6) interposed in a pipe (7, 13, 9, 10) extending from the chemical solution supply pump (4) to the spray nozzle (5). The electrostatic application type sprayer according to claim 5, wherein the pressure of the chemical liquid supplied from the chemical liquid supply pump (4) through the main cock (6) is detected. The main cock has a single inlet (6a) connected to the pipe (7) from the chemical liquid supply pump (4) and one outlet (6b) connected to the spray nozzle (5) (13 , 9, 10), and the other outlet (6c) is a three-way cock (6) connected to a pipe (8) leading to the chemical tank (2). Electricity spreader.

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