JP2008125434A - Traveling type chemical liquid-mixing and spraying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traveling type chemical liquid-mixing and spraying apparatus which can accurately, simply and easily spray a chemical liquid in an undiluted liquid state as such or a diluted chemical liquid diluted in a volume of, for example, ≥1,000 times, and is excellent in chemical liquid spraying workability. <P>SOLUTION: This traveling type chemical liquid-mixing and spraying apparatus is characterized by disposing a chemical liquid supply pump 7 for forcibly supplying a chemical liquid of a chemical liquid storage portion 30 into a water suction route 2 in a chemical liquid supply route 3, disposing flow route-switching devices 50a to 50c capable of being switched to chemical liquid spray operation-switching positions for allowing flows from the spray routes 4a to 4c to returning nozzles to stop flows from the spray routes to the returning routes, or to chemical liquid spray stop operation-switching positions for stopping flows to the spray nozzles to allow flows from the spray routes to the returning routes, in connection portions between the returning routes 5a and the spraying routes 4a to 4c, and controlling the supply volumes of the chemical liquid with the chemical liquid supply pump 7 on the basis of the operations of the flow route-switching devices 50a to 50c, with a controller 70. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a traveling type chemical liquid mixing and distributing apparatus for mixing a drug with an aqueous solution and distributing a diluted chemical liquid to a crop or soil while traveling in a field or the like.

  In general, this kind of chemical liquid mixing and distributing device is composed of a pressure feed pump, a merging portion communicating with the suction port of the pressure feeding pump, a chemical liquid supply path communicating the merging portion and the chemical liquid tank, and a merging portion and the water tank. And a spray passage communicating with the discharge port of the pressure pump.

  In addition, a nozzle is provided at the tip of the spraying path via an open / close cock, and a first orifice is interposed in the water absorption path and a second orifice is interposed in the chemical solution supply path.

  The orifice diameter of the first orifice and the orifice diameter of the second orifice are set according to the desired mixing ratio of the chemical solution and water, that is, the dilution factor.

  In the above-described chemical liquid mixing and distributing apparatus, when the pressure pump is started and the open / close cock is opened, the chemical liquid is stored in the chemical liquid supply path and the water tank is stored in the water tank due to the negative pressure generated on the suction side of the pressure pump. In this case, the chemical solution and water are mixed at a mixing ratio set by the orifice diameter of the first orifice and the orifice diameter of the second orifice. It is done. And the diluted chemical | medical agent liquid is spread | dispersed on a field etc. from a nozzle through a spraying path.

  By the way, in the above chemical solution mixing and distributing apparatus, as described above, the dilution rate of the diluted chemical solution is determined by the difference in the orifice diameters of both orifices provided in the water absorption channel and the chemical solution supply channel. For example, if the orifice diameter of the second orifice on the side of the chemical solution supply path is to be made smaller to be 1000 times or more, there is a limit naturally, that is, if the orifice diameter is made too small, so-called clogging is likely to occur. Only adjusting the orifice diameter is enough to distribute a dilute solution with a dilution ratio of several hundred times. Therefore, if the drug is used as it is, it is difficult to obtain a dilute solution diluted 1000 times, for example. is there.

  Therefore, when preparing and distributing a chemical solution diluted about 1000 to 2000 times with the above chemical solution distribution apparatus, for example, a chemical solution diluted about 10 times is prepared, and this chemical solution is added to an aqueous solution as needed. By mixing, for example, a desired diluted chemical solution diluted 1000 times is distributed.

  Therefore, in the above chemical solution mixing and distributing apparatus, for example, it is necessary to prepare a chemical solution diluted about 10 times in advance, and not only the workability of the distribution is poor, but also the management of the dilution rate of the diluted chemical solution to be distributed is time-consuming. In some cases, it may lead to the distribution of a dilute solution with the wrong dilution rate.

Further, in the above-described conventional chemical liquid mixing and distributing apparatus, it is difficult to change the dilution factor of the diluted chemical liquid to be distributed during the distribution operation.
JP 11-76906 A

  The present invention has been developed in view of the above circumstances, and the object is to distribute a diluted chemical solution that is diluted 1000 times or more accurately and easily and easily, even though the chemical solution is used as a stock solution. In addition, another object of the present invention is to provide a traveling type liquid chemical mixing and distributing apparatus that is excellent in workability of chemical liquid spraying.

In order to achieve the above object, the invention described in claim 1
In a traveling chemical solution distribution device in which a nozzle for chemical solution distribution is attached to the airframe and the chemical solution is distributed from the nozzle to the object to be distributed,
In the aircraft that can run,
A pump that can be driven and controlled by a controller;
A water absorption path that communicates a water storage section that stores water and the suction side of the pressure pump, a chemical liquid supply path that communicates a chemical liquid storage section that stores chemical liquid and the middle of the water absorption path, and a discharge side of the pressure pump A plurality of distribution paths, and a reflux path that connects each distribution path and the water absorption path, and the nozzle is provided at a terminal portion of the distribution path, while the chemical supply path includes a chemical storage section. A chemical supply pump for forcibly supplying the chemical to the water absorption path is provided;
The connecting portion between each reflux path and the distribution path is a chemical solution distribution operation switching position that allows the flow from the distribution path to the nozzle for distribution and prevents the flow from the distribution path to the return path; and A flow path switching device capable of switching to a chemical liquid distribution stop operation switching position that prevents the flow to the nozzle for distribution and allows the flow from the distribution path to the reflux path;
The controller is configured to control the supply amount of the chemical solution by the chemical solution supply pump based on the operation of the flow path switching unit.

  According to a second aspect of the present invention, in the traveling type chemical liquid mixing and distributing apparatus according to the first aspect, the discharge amount of the pressure pump increases as the traveling speed of the airframe increases. It is what.

  According to the first aspect of the present invention, since a predetermined amount of chemical liquid is forcibly supplied to the water absorption passage by the chemical liquid supply pump, the chemical liquid can be used as it is, and a conventional so-called negative pressure type chemical liquid can be used. Of course, it is possible to distribute a diluted chemical solution diluted 1000 times or more, for example, more easily and more easily than the mixing and distributing apparatus, and by switching the flow path with the flow path switching device, for example, from a single distribution path. Even if the distribution of the diluted chemical solution is stopped, it is possible to stably distribute the diluted chemical solution at a preset magnification rate from other distribution channels, and by setting a plurality of types of dilution magnifications in advance in the controller, It is also possible for the operator to select a desired dilution rate during the distribution work.

  Further, according to the invention described in claim 2, in addition to the effect of the invention described in claim 1, it is possible to stably distribute a predetermined amount of the diluted drug solution to the object to be distributed regardless of the traveling speed of the aircraft. I can do it.

  1 to 3 show an example of a traveling chemical liquid mixing and distributing apparatus used for distributing chemicals in a field or the like.

This traveling chemical solution mixing and distributing device is for distributing a diluted chemical solution mixed at a predetermined dilution rate to crops or soil while traveling on a running wheel in a field or the like, for example. Basically,
A pumping pump 1 driven in conjunction with a traveling engine 11 of the airframe 10;
A water absorption path 2 that communicates the suction side of the pressure pump 1 and a water tank 20 as a water reservoir;
A chemical solution supply path 3 that communicates the chemical solution tank 30 for storing the chemical solution and the middle of the water absorption path 2;
Three distribution channels 4a to 4c communicating with the discharge side of the pressure pump 1;
Reflux paths 5 a to 5 c are provided to connect the middle of the distribution paths 4 a to 4 c and the downstream side of the connection portion between the water absorption path 2 and the chemical solution supply path 3, and these components are mounted on the body 10.

  In the embodiment shown in the figure, the end portions of the distribution paths 4a to 4c are held by the booms 12 extending horizontally from the sides of the machine body 10, and diluted chemical solutions are applied to the end sections of the distribution paths 4a to 4c. Each of the five nozzles 41 is mainly provided for spraying in a mist form.

  As the rotational speed of the traveling engine 11 increases and the traveling speed of the airframe 10 sequentially increases, the pumping pump 1 increases its discharge amount.

  In addition, the connecting portion between the distribution paths 4a to 4c and the reflux paths 5a to 5c allows the flow from the distribution paths 4a to 4c to the nozzle 41 and prevents the flow from the distribution path 4 to the reflux path 5 Flow path switchers 50a to 50c constituted by manual cocks that can be switched to a switching position, or a chemical liquid distribution stop operation switching position that prevents the flow from the distribution path 4 to the reflux path 5 while preventing the flow to the nozzle 41. It is intervened.

  The switching operation of the flow path switching devices 50 a to 50 c configured by the manual cock can be performed in the cab 13 of the machine body 10.

  Detectors 51a to 51c that detect the switching positions are incorporated in the flow channel switching devices 50a to 50c, respectively, and the flow channel switching devices 50a to 50c are each set to a "chemical solution distribution operation switching position" or by these detectors 51a to 51c. Switching to the “chemical solution stop operation switching position” is detected.

  Further, in the above chemical solution mixing and distributing apparatus, the water flow from the water tank 20 in the water absorption path 2 toward the pressure feed pump 1 is allowed on the upstream side of the connection section with the reflux path 5 in the water absorption path 2. A check valve 6 is provided to prevent the flow of water from the pressure pump 1 toward the water tank 20.

  Further, a motor-driven chemical solution supply pump 7 for forcibly supplying the chemical solution in the chemical solution tank 30 to the water absorption channel 2 is provided in the middle of the chemical solution supply channel 3. Control is performed by a controller 70 on which a microcomputer is mounted.

  As the chemical solution supply pump 7, a tube pump excellent in flow rate accuracy capable of accurately feeding a small amount of flow rate is used, and a battery 14 mounted on the machine body 10 is used as a power source.

  The controller 70 controls the supply amount of the chemical solution from the chemical solution supply pump 7 based on the operation of the flow path switching devices 50a to 50c. Specifically, the flow channel switching devices 50a to 50c. On the basis of the output signals from the detectors 51a to 51c incorporated in the switch, when each of the flow path switching devices 50a to 50c is switched to the “chemical solution distribution switching position”, the switching devices 50a to 50c are provided. While controlling the drive of the chemical solution supply pump 7 so that the amount of the chemical solution corresponding to the discharge amount of the diluted chemical solution from each of the distribution channels 4a to 4b is supplied, each of the flow channel switching devices 50a to 50c is set to “chemical solution distribution stop operation switching position ”Is switched to the distribution channels 4a to 4b provided with the switching devices 50a to 50c. In other words, in the flow path switching devices 50a to 50c, the chemical liquid supply pump is supplied so that the chemical liquid in an amount corresponding to the chemical liquid distribution amount in the distribution path that is the “chemical liquid distribution operation switching position” is supplied. 7 is controlled.

  Further, the controller 70 can change the flow rate of the chemical solution supply pump 7 so as to obtain a diluted chemical solution having a plurality of dilution factors (for example, dilution factors such as 1000 times, 1200 times, and 1500 times), and the dilution selected by the operator. An amount of chemical liquid corresponding to the magnification can be sent out to the water absorption path 2.

  Further, the controller 70 also detects the discharge amount of the pressure feed pump 1, so that the supply amount of the chemical solution by the chemical solution supply pump 7 increases as the traveling speed of the machine body 10 increases and the discharge amount of the pressure feed pump 1 increases. The chemical solution supply pump 7 is controlled.

  In the traveling type chemical liquid mixing and distribution apparatus having the above configuration, first, the controller 70 is turned on to set the controller 70 so as to obtain a diluted chemical liquid having a dilution factor of 1000 times, for example, and then the pump pump 1 is driven. At the same time, when the channel switching devices 50a to 50c of the distribution channels 4a to 4c are switched to the “chemical solution distribution operation switching position”, the water in the water tank 20 flows through the water absorption channel 2 via the pressure feed pump 1, while the chemical solution When the supply pump 7 is driven, the chemical liquid in the chemical liquid tank 30 is forcibly fed into the water absorption path 2 and mixed with the water flowing through the water absorption path 2, and the diluted liquid diluted 1000 times is shown in FIG. As shown in FIG. 2, it is distributed from the nozzle 42 via each distribution path 4a-4c, At this time, the supply amount of the chemical solution by the chemical solution supply pump 7 is controlled by the controller 70 at any time. Than is.

  That is, when all the distribution paths 4a to 4c are open, the driving of the chemical supply pump 7 is controlled so that the amount of the chemical corresponding to the amount of the diluted chemical distributed from these three distribution paths 4a to 4c is supplied. As shown in FIG. 3, for example, when the flow path switch 50a is switched to the “chemical solution distribution stop operation switching position”, the flow path within the distribution path 4a in which the flow path switch 50a is provided. The diluted chemical solution is returned to the water absorption channel 2 through the reflux channel 5a, and then sucked into the pressure pump 1 again. At the same time, the chemical solution is supplied to the distribution channel 4a in which the switch 50a is provided. Since the controller 70 controls the driving of the chemical solution supply pump 7 so that the amount of the chemical solution corresponding to the amount of the diluted chemical solution distributed from the open distribution channels 4b and 4c is stopped. is there.

  Further, even when the traveling speed of the machine body 10 is increased, for example, when the chemical solution is distributed, the discharge amount of the pressure feed pump 1 is increased and the supply amount of the chemical solution by the chemical solution supply pump 7 is also increased. A predetermined amount of chemical solution having a predetermined dilution rate can be distributed.

  Thus, even if one or two of the distribution paths 4a to 4c are closed, there is no problem that the dilution rate of the diluted chemical solution to be distributed changes carelessly.

  On the other hand, when the flow path switching devices 50a to 50c are switched to the “chemical solution distribution stop operation switching position” and all the distribution paths 4a to 4c are closed, all the return paths 5a to 5c are distributed to the distribution paths 4a to 4a. The dilute chemical solution in the distribution channels 4a to 4c is returned to the water absorption channel 2 through the reflux channels 5a to 5c and then sucked into the pumping pump 1 again. 1 circulates in a closed circuit composed of downstream areas of the distribution channels 4a to 4c, the reflux channels 5a to 5c, and the water absorption channel 2, thereby preventing the water in the water tank 20 from being fed into the water absorption channel 2 and the chemical supply pump 7 is stopped by the control of the controller 70, and the supply of the chemical solution to the water absorption path 2 is also interrupted.

  In the embodiment shown in FIGS. 1 to 3, the water is stored in advance in the water tank 20 and the water in the water tank 20 is sequentially sent to the water absorption path 2. However, as shown in FIG. In addition to the tank 20, for example, a pumping hose 21 and a pumping pump 22 are provided as a pumping path for pumping water collected in a paddy field, and the water tank 20 is arbitrarily supplied with the pumping hose 21 and the pumping pump 22. You may make it pump up.

  And by adopting the above configuration, for example, water used in paddy fields and water flowing through agricultural waterways can be used effectively, and the water tank 20 mounted on the body 10 can be downsized, and as a result The airframe 10 can also be reduced in size.

The schematic block diagram which shows one Embodiment of the traveling type chemical | medical solution mixing and spreading apparatus concerning this invention. Explanatory drawing which shows one Embodiment of the traveling type chemical | medical solution mixing and spreading apparatus concerning this invention. Explanatory drawing which shows one Embodiment of the traveling type chemical | medical solution mixing and spreading apparatus concerning this invention. Explanatory drawing of the principal part which shows another embodiment of the traveling type chemical | medical solution mixing distribution apparatus concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pumping pump 10 Airframe 11 Engine for driving | running | working 2 Water absorption path 20 Water tank (water storage part)
3 Chemical liquid supply path 30 Chemical liquid tank (chemical liquid storage part)
4a 撒 distribution path 4b 撒 distribution path 4c 撒 distribution path 41 nozzle 5a reflux path 5b reflux path 5c reflux path 50a channel switching unit 50b channel switching unit 50c channel switching unit 7 chemical solution supply pump 70 controller

Claims (2)

  In a travelable chemical liquid distribution device in which a chemical liquid distribution nozzle is attached to the machine body and the chemical liquid is distributed to the object to be distributed from the nozzle, the travelable body includes a pressure feed pump that can be driven and controlled by a controller. A water absorption path that connects the water storage section that stores water and the suction side of the pressure pump, a chemical liquid supply path that connects the chemical storage section that stores chemical liquid and the middle of the water absorption path, and a discharge side of the pressure pump A plurality of communication channels and a return channel that connects each distribution channel and the water absorption channel are provided, and the nozzle is provided at a terminal portion of the distribution channel, while a chemical solution storage unit is provided in the chemical solution supply channel Is provided with a chemical liquid supply pump for forcibly supplying the chemical liquid to the water absorption path, and allows a flow from the distribution path to the distribution nozzle at a connection portion between each of the reflux paths and the distribution path. The return from the distribution route A flow path that can be switched to a chemical liquid distribution operation switching position that blocks the flow to the path and a chemical liquid distribution stop operation switching position that blocks the flow to the distribution nozzle and allows the flow from the distribution path to the return path. A traveling type chemical solution distribution apparatus, characterized in that a switching device is provided, and the controller controls the supply amount of the chemical solution by the chemical solution supply pump based on the operation of the flow path switching device.   2. The traveling type chemical liquid mixing and distributing apparatus according to claim 1, wherein the discharge amount of the pressure feed pump increases as the traveling speed of the airframe increases.

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