JP2013201933A - Liquid agent spraying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To locally effectively spray a liquid agent depending on a crop growth condition in a field in a liquid agent spraying apparatus for spraying a liquid agent while moving in the field.SOLUTION: A liquid agent spraying apparatus 1 includes a first tank 2, a second tank 3, a spray nozzle 4, a first pump 5, a suction channel 10 for connecting the first tank 2 to the suction side of the first pump 5, a force feed channel 11 for connecting the force feed side of the first pump 5 to the spray nozzle 4, a second liquid supply route 20 that is connected to the joining part 17 of the suction channel 10 and supplies a second liquid W2 of the second tank 3 to the suction channel 10, a second pump 6 provided on the second liquid supply route 20, a control part 7 that controls the flow rate of the force feed channel 11 at a set flow rate and controls the mixing ratio of a first liquid W1 to the second liquid W2 at a set ratio and a local spray switch 8 for driving the second pump 6 at a set number of revolutions in order to locally mix and spray the second liquid W2 in a set concentration.

Description

  The present invention relates to a liquid agent spraying device for spraying a liquid agent to crops in a field.

  The chemical liquid mixing and spraying device described in Patent Document 1 below includes a pressure pump, a water storage section that stores water, a water absorption path that communicates the water storage section and the suction side of the pressure pump, and a chemical liquid storage that stores the chemical liquid. A chemical solution supply path that connects the chemical solution storage section and the middle of the water absorption path, and a spray path that communicates with the discharge side of the pressure feed pump, and the chemical supply path contains the chemical liquid in the chemical storage section as a water absorption path. A chemical supply pump for forcibly supplying is provided. Such a chemical liquid mixing and spraying device can spray the diluted chemical liquid diluted to a desired concentration by mixing the chemical liquid in the chemical liquid storage section with the water sucked into the water absorption path from the water storage section.

JP 2008-125433 A

  2. Description of the Related Art Some working machines such as a boom sprayer that sprays a chemical while moving in a field perform work by mounting the above-described chemical liquid mixing and spraying device on a traveling machine body. At this time, according to the chemical liquid mixing and spraying device described above, it is possible to spray the chemical liquid having an arbitrary dilution factor by changing the flow rate of the chemical liquid supply pump. However, in this prior art, the concentration of the chemical solution sprayed on the field is sprayed at a constant concentration after changing the dilution factor, and it is not assumed that the dilution factor is appropriately changed during spraying.

  On the other hand, crops in the field are not necessarily in a uniform growth state throughout the field, and crops that are poorly grown due to disease or the like may locally exist in the field. In such a case, for example, if a chemical solution with a constant dilution concentration is sprayed over the entire field, a sufficient control effect may not be obtained for a crop in which disease is progressing. Dispersing high-priced chemicals throughout the field can provide a sufficient control effect for crops that are suffering from disease.However, overspreading expensive chemicals increases costs and affects the surrounding environment. Will also be concerned.

  In other words, when there is a local growth failure as described above when spraying chemicals or the like while moving in the field, crops with poor growth are more likely to be distributed than the chemical solution is evenly distributed throughout the field. It is more efficient to intensively spray a liquid agent such as a highly effective chemical solution in a local area where there is. However, since the conventional liquid agent spraying device cannot perform such local spraying, there is a problem that the liquid agent spraying is economical and effective and has little influence on the surrounding environment.

  An object of the present invention is to cope with such a problem. For example, in a liquid agent spraying apparatus that sprays a liquid agent while moving in the field, it is effective locally depending on the state of crop growth in the field. That can be sprayed with high liquidity, and even when using expensive liquids, by spraying locally on the area where the liquid is to be sprayed, it is possible to spray liquids with high economic efficiency, and the control effect It is an object of the present invention to be able to reduce the influence on the surrounding environment by allowing a high-priced liquid agent to be sprayed locally at a necessary location.

  In order to achieve such an object, the liquid agent spraying device according to the present invention comprises at least the following configuration.

  A liquid agent spraying device that is mounted on a traveling machine body and sprays a liquid agent while moving, a first tank storing a first liquid, a second tank storing a second liquid, and the first liquid or A spray nozzle unit that sprays a liquid agent composed of a mixture of the first liquid and the second liquid, a first pump that pumps the liquid agent to the spray nozzle unit, and suction of the first tank and the first pump A suction channel connecting the side, a pressure feeding channel connecting the pumping side of the first pump and the spray nozzle unit, and a junction of the suction channel, the second liquid in the second tank is While controlling the flow rate of the 2nd liquid supply path supplied to a suction flow path, the 2nd pump which is provided in the 2nd liquid supply path and sends the 2nd liquid to the confluence | merging part, and the said pressure supply flow path to setting flow volume The mixing ratio of the first liquid and the second liquid is controlled to a set ratio And control unit, in order to mix sprayed at nominal concentrations locally the second liquid, liquid sprayer, characterized in that it comprises a local scatter switch for driving the second pump at the set rotational speed.

  In the present invention having such features, for example, in normal spraying, a driver who performs spraying with the first liquid (or a liquid obtained by mixing the first liquid with the second liquid at a low concentration) and controls the traveling body is provided. When it is confirmed that there are local crop growth defects in the field, the local spray switch is operated when the traveling aircraft approaches the local area, so that the second growth area is locally generated. Liquid can be sprayed at a set concentration. The 2nd liquid here selects the optimal agricultural chemical, fertilizer, etc. which an operator desires according to the growth condition of a crop.

  According to this, it becomes possible to spray the second liquid locally while spraying the first liquid over the entire field, and spraying the expensive chemical solution only in necessary places, or crops in the field Depending on the growth situation, it is possible to perform effective liquid spraying locally, and it is possible to perform effective and economical liquid spraying. Moreover, since the liquid agent with a high control effect can be locally spread | diffused to a required location, the influence on surrounding environment can be decreased.

It is explanatory drawing which showed the whole piping structure of the liquid agent spraying apparatus which concerns on one Embodiment of this invention. It is explanatory drawing which showed the function of the liquid agent spraying device which concerns on embodiment of this invention. It is explanatory drawing which showed the operation example of the control part in the liquid agent spraying apparatus which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an overall piping configuration of a liquid agent spraying apparatus according to an embodiment of the present invention. The liquid agent spraying device 1 is mounted on a traveling machine body (not shown) and sprays the liquid agent while moving. The liquid spraying apparatus 1 according to the embodiment of the present invention can be applied to a boom sprayer or the like that is mounted on a traveling machine such as an agricultural tractor and sprays a control liquid (chemical solution) or liquid fertilizer while moving in the field. However, it is not particularly limited to this.

  The liquid spraying device 1 includes a first tank 2, a second tank 3, a spray nozzle unit 4, a first pump 5, a second pump 6, and a control unit 7. The first tank 2 stores the first liquid W1, and the second tank 3 stores the second liquid W2 different from the first liquid W1. The spray nozzle unit 4 includes one or a plurality of spray nozzles (for example, boom nozzles) 4A, 4B, and 4C, and is a liquid agent composed of the first liquid W1 or a mixed liquid of the first liquid W1 and the second liquid W2. To disperse.

  The first pump 5 pressure-feeds the liquid agent described above to the spray nozzle portion 4, and the first tank 2 and the suction side of the first pump 5 are connected by a suction flow path 10. Further, the pumping side of the first pump 5 and the spray nozzle portion 4 are connected by a pumping flow path 11. In the illustrated example, a three-way valve 12 is provided in the pressure feed passage 11, the first outlet 12 </ b> A of the three-way valve 12 is communicated with the spray nozzle unit 4, and the second outlet 12 </ b> B of the three-way valve 12 is refluxed. It is connected to the path 13. One end of the annular flow path 13 is connected to the second outlet 12 </ b> B of the three-way valve 12, and the other end is connected to the connecting portion 14 of the suction flow path 10. Circulate. In addition, the annular flow path 13 is connected to the upstream side of the three-way valve 12 in the pressure feed flow path 11 via the adjustment valve 15. A flow rate sensor 16 is provided in the pressure flow path 11.

  The second tank 3 is connected to the merging portion 17 of the suction flow path 10 via the second liquid supply path 20. As a result, the second liquid supply path 20 supplies the second liquid W2 in the second tank 3 to the merging portion 17 of the suction flow path 10. A second pump 6 is provided in the second liquid supply path 20, and the second liquid W <b> 2 is sent to the junction 17 by the second pump 6. The second pump 6 is driven by a drive unit (drive motor) 6A. The suction flow path 10 includes a first check valve 18 on the downstream side of the merging portion 17 and a second check valve 19 on the upstream side of the merging portion 17.

  The control unit 7 controls the flow rate of the pumping flow path 11 to the set flow rate, and controls the mixing ratio of the first liquid W1 and the second liquid W2 to the set ratio. The mixing ratio here includes the case where only the first liquid W1 is present and the mixing ratio of the second liquid W2 is zero. Specifically, the control unit 7 controls the rotational speed of the drive unit 6A that drives the second pump 6 based on the flow rate detected by the flow rate sensor 16. The setting of the spraying flow rate and the mixing ratio by the control unit 7 is a pre-setting that is performed before the spraying operation. Uniform spraying is performed under the set conditions.

  On the other hand, the liquid agent spraying device 1 includes a local spraying switch 8 that drives the second pump 6 at a set rotational speed in order to locally mix and spray the second liquid W2 at a set concentration. The local spraying switch 8 is a switch that allows the operator of the traveling machine body to operate the driving of the second pump 6 among the operations of the control unit 7 provided behind the traveling machine body, preferably the traveling machine body. Equipped to the operation unit. When the local spraying switch 8 is operated, the second pump 6 is rotationally driven at the set rotational speed, and the second liquid W2 is supplied to the joining portion 17 with a predetermined supply amount.

  FIG. 2 is an explanatory diagram showing functions of the liquid spraying device according to the embodiment of the present invention. The liquid agent spraying device 1 is mounted on the traveling machine body T and sprays the liquid agent on a farm field or the like while traveling. When the operator M who controls the traveling machine body T finds that the crop is not growing properly during the spraying operation in the field, the operator M operates the local spraying switch 8 provided in the control unit T1 of the traveling machine body T. Then, a liquid agent in which a predetermined amount of the second liquid W2 is locally mixed with the growth failure region S is sprayed.

  In the spraying work using a boom sprayer or the like, the working speed of the traveling machine body T is about 3 km / h≈0.8 m / s, so if the pilot M finds the growth failure area S ahead of L = 8 m, the local spraying switch 8 is operated, about 10 s after the switch operation, the liquid spraying device 1 reaches the growth failure region S, and during this time, the second liquid W2 supplied from the second tank 3 is actually sprayed by the spray nozzle unit. 4 need to be sprayed. Accordingly, the local spray switch 8 is operated so that the time from when the local spray switch 8 is operated until the second liquid W2 is sprayed from the spray nozzle unit 4 at the set concentration is within a set time (for example, 10 s). The rotation speed of the second pump 6 is set. In the actual spraying operation, it takes some time until the second liquid supply path 20 is filled with the second liquid W2. Therefore, the second liquid W2 is temporarily ejected before the spraying operation, so that the second liquid is supplied. It is preferable that the supply path 20 be filled with the second liquid W2.

  FIG. 3 is an explanatory diagram showing an operation example of the control unit in the liquid agent spraying apparatus according to the embodiment of the present invention. In the example shown in FIG. 3A, the spraying flow rate of the liquid agent is controlled to be constant, the second pump 6 is stopped during normal time (when the local spraying switch 8 is turned off), and the local spraying switch 8 is turned on. To Ts2, the second pump 6 is driven at the set rotational speed n0. In this example, normally, only the first liquid W1 stored in the first tank 2 is sprayed, and a liquid mixture obtained by mixing the first liquid W1 and the second liquid W2 is sprayed during the period when the local spray switch 8 is operated. To do. According to this, since the relatively expensive second liquid W2 can be sprayed limited to the necessary portions, economical and effective liquid spraying becomes possible.

  In the example shown in FIG. 3 (b), the spraying flow rate of the liquid agent is controlled to be constant, and the second pump 6 is operated at the first set rotational speed n1 with a low rotational speed during normal times (when the local spraying switch 8 is off). The rotational speed of the second pump 6 is switched to a second set rotational speed n2 higher than n1 between Ts1 and Ts2 when the local spray switch 8 is turned on. In this example, a liquid agent whose mixing ratio of the second liquid W2 is lower than the set concentration is normally sprayed, and a liquid agent having a mixing ratio of the second liquid W2 is sprayed during the period when the local spraying switch 8 is operated. According to this, the 1st liquid stored in the 1st tank 2 is made into water (fresh water), the dilution concentration of the 2nd liquid W2 is made low normally, and the 2nd liquid W2 is spread | dispersed by a set density | concentration to a required location. be able to.

  In the example shown in FIG. 3C, in the normal time (when the local spraying switch 8 is off), the spraying flow rate of the liquid agent is controlled to a constant value q1, and the second pump 6 is set to the first set rotational speed with a low rotational speed. During the period from Ts1 to Ts2 when the local spraying switch 8 is turned on by rotating at n1, the spraying flow rate of the liquid agent is decreased to a value q2 lower than the constant value q1, and the rotation speed of the second pump 6 is increased to a value higher than n1. Switch to 2 setting rotation speed n2. In this example, the liquid agent having a low mixing ratio of the second liquid W2 is normally sprayed, and the liquid agent having a high mixing ratio of the second liquid W2 can be sprayed during the period when the local spraying switch 8 is operated.

  Thus, according to the embodiment of the present invention, for example, in the liquid agent spraying apparatus 1 that sprays the liquid agent while moving in the field, it is possible to perform effective liquid spraying locally depending on the state of crop growth in the field. Even when an expensive liquid agent is used, highly economical liquid agent spraying can be performed by performing local spraying on a region where the liquid agent is to be sprayed. Moreover, the influence on the surrounding environment can be reduced by allowing the liquid agent having a high control effect to be locally sprayed on the necessary portions.

1: liquid agent spraying device, 2: first tank, 3: second tank, 4: spray nozzle part,
5: 1st pump, 6: 2nd pump, 6A: Drive part (drive motor),
7: Control unit, 8: Local spray switch,
10: suction channel, 11: pressure feed channel,
12: Three-way valve, 12A: First outlet, 12B: Second outlet,
13: Ring channel, 14: Connection part,
15: Regulating valve, 16: Flow sensor, 17: Joint flow path,
18: first check valve, 19: second check valve, 20: second liquid supply path,
W1: first liquid, W2: second liquid,
T: traveling body, T1: operation unit, M: pilot, S: poor growth area

Claims (6)

A liquid spraying device (1) that is mounted on a traveling machine body (T) and sprays liquid while moving,
A first tank (2) in which the first liquid (W1) is stored;
A second tank (3) in which the second liquid (W2) is stored;
A spray nozzle part (4) for spraying the liquid composed of the first liquid (W1) or a mixture of the first liquid (W1) and the second liquid (W2);
A first pump (5) for pumping the liquid agent to the spray nozzle part (4);
A suction flow path (10) connecting the suction side of the first tank (2) and the first pump (5);
A pumping flow path (11) connecting the pumping side of the first pump (2) and the spray nozzle part (4);
A second liquid supply channel (20) connected to the junction (17) of the suction channel (10) and supplying the second liquid (W2) of the second tank (3) to the suction channel (10). When,
A second pump (6) provided in the second liquid supply path (20) and sending the second liquid (W2) to the junction (17);
A control unit (7) for controlling the flow rate of the pumping flow path (11) to a set flow rate and controlling the mixing ratio of the first liquid (W1) and the second liquid (W2) to a set ratio;
In order to locally mix and spray the second liquid (W2) at a set concentration, the liquid spray includes a local spray switch (8) that drives the second pump (6) at a set rotational speed. apparatus.   The local spray switch so that the time from when the local spray switch (8) is operated until the second liquid (W2) is sprayed from the spray nozzle part (4) at a set concentration is within a set time. The liquid agent spraying device according to claim 1, wherein the number of rotations of the second pump (6) when (8) is operated is set.   The liquid spraying device according to claim 1, wherein the local spraying switch (8) is provided in a control unit (T1) of the traveling machine body (T).   The control unit (7) stops the second pump (6) when the local spray switch (8) is turned off, and sets the second pump (6) by turning on the local spray switch (8). The liquid spraying device according to any one of claims 1 to 3, wherein the liquid spraying device is driven at a rotational speed.   The controller (7) rotates and drives the second pump (6) at a first set rotational speed when the local spray switch (8) is turned off, and the second spray switch (8) is turned on to turn on the second pump. The liquid agent spraying device according to any one of claims 1 to 3, wherein the rotation speed of the pump (6) is switched to a second set rotation speed that is higher than the first set rotation speed.   The said control part (7) reduces the flow volume of the liquid agent which flows through the said pressure-feed flow path (11) by operation of the said local spray switch (8), The liquid agent spraying apparatus of Claim 5 characterized by the above-mentioned.

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