JP2011205983A - Chemical-spreading vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chemical-spreading vehicle exhibiting excellent attaching ability and/or reaching ability in addition to the inhibition of the occurrence of drift phenomena.SOLUTION: The chemical-spreading vehicle 1 is equipped with an air passage 5 communicating an air-sucking opening 6 installed in the rear part of a vehicle body 2 carrying a chemical tank 3, with air-jetting openings 7 opened at a part in the perimeter direction of the vehicle body of from one side of a vehicle body 2 through the upper side to the other side. A blower 9 is arranged in the air passage 5, and a plurality of nozzles A, B is arranged in line in the air-jetting openings 7 so that each of the droplet-jetting direction may be radially outward. As the nozzles, gas-unmixing type nozzles B and gas-mixing type nozzles A are used, and the gas-mixing type nozzles A and the gas-unmixing type nozzles B in a mixed state are arranged in the perimeter direction of the vehicle body.

Description

  TECHNICAL FIELD The present invention relates to a chemical solution sprayer that mounts a chemical solution tank and sprays a chemical solution from a nozzle onto agricultural products.

  Conventionally, this type of chemical solution spraying vehicle is commonly referred to as a speed sprayer (SS), and for example, one described in Patent Document 1 below is known. This chemical spray vehicle has an air suction port provided at the rear of the vehicle body on which a chemical solution tank is mounted, and an air outlet opening in the circumferential direction of the vehicle body from one side of the vehicle body to the other side. A ventilation passage is provided, and a blower is provided in the ventilation passage, and a plurality of nozzles are arranged at the air outlet in the circumferential direction of the vehicle body with each droplet ejection direction being radially outward perpendicular to the vehicle body traveling direction. ing. For each of the plurality of nozzles, a conventional nozzle C as shown in FIGS. 13 and 14A is used. Such a conventional nozzle C adopts a non-mixed structure in which no gas is mixed with the chemical liquid, and sprays relatively fine spray droplets as a hollow cone spray pattern R at a high speed. It is accelerated and discharged by air blowing. Therefore, it is said that this chemical spray vehicle is excellent in both the adhesion performance of the scale that allows spray droplets to adhere to the entire crop and the reachability of the scale for spraying spray droplets as far as possible from the chemical spray vehicle.

  However, since the conventional nozzle C injects only the liquid from the injection port, the diameter of the sprayed spray droplet is extremely small, for example, 100 μm or less. For this reason, spray droplets tend to float in the air, spray droplets fly on the wind, reach the distance by the so-called drift phenomenon, and spray unnecessarily on the adjacent vegetable garden where certain chemical spraying is prohibited There is a risk of being. In order to prevent such inconveniences, it was necessary to spray the chemical liquid with a reduced injection amount, and it was necessary to spray the chemical liquid with low workability.

JP 2000-51754 A

  Therefore, a drift reduction nozzle D as shown in FIG. The drift reduction nozzle D has an air-mixing structure, and coarse particles having an average spray particle size of about 200 to 300 μm are jetted as a hollow cone spray pattern S at a low speed. According to this chemical spray vehicle, coarse particles are sprayed from the drift reduction nozzle D at a low speed, and this is accelerated and released by the blowing of the chemical spray vehicle, so that the drift phenomenon is unlikely to occur. However, both the adhesion performance and reachability are significantly inferior to those of the conventional nozzle C, and there is a problem that it lacks practicality.

  The present invention has been made in view of the above-described conventional problems, and in addition to being able to suppress the occurrence of a drift phenomenon, it is an object of the present invention to provide a chemical spray vehicle that has excellent adhesion performance and / or reachability. To do.

  In order to achieve the above object, a chemical spray vehicle according to the present invention includes an air suction port provided at a rear portion of a vehicle body equipped with a chemical solution tank, and a vehicle body periphery extending from one side of the vehicle body to the other side through the upper side. A ventilation passage that communicates with the air outlet opening in the direction portion, a blower is provided in the ventilation passage, and a plurality of nozzles are arranged in the air outlet around the vehicle body with their respective droplet ejection directions radially outward. In the chemical spray vehicle arranged in the direction, as the nozzle, a nozzle body having a liquid guide path therein, a nozzle plate provided at the tip of the liquid guide path and having a nozzle hole, and the other end of the liquid guide path A non-mixing type nozzle that includes a connection port portion that is formed and connected to a liquid guide pipe from a chemical tank, and that ejects liquid droplets from the nozzle port in a flat spray pattern when viewed in the axial direction of the nozzle port, and the inside A nozzle body with a liquid guide channel on the tip and the tip of the liquid guide channel Formed on the nozzle body between the injection plate and the connection port portion, the connection port portion formed at the other end of the liquid introduction path and connected to the liquid introduction pipe from the chemical liquid tank. An air intake port for taking air into the liquid guide path, and using an air-mixing nozzle that ejects liquid droplets from the nozzle port in a flat spray pattern when viewed in the axial direction of the nozzle port, and The non-air-mixing nozzle is arranged in a mixed manner in the vehicle body circumferential direction.

  Further, in the above configuration, the droplet ejection direction of the non-air-mixing nozzle is set to be a direction inclined backward in the vehicle body traveling direction with respect to the droplet ejection direction of the air-mixing nozzle.

  In each configuration described above, the mixed-type nozzle and the non-mixed nozzle are arranged so that the major axis direction of the flat shape of the spray pattern of the droplets ejected from the mixed-type nozzle and the non-mixed-type nozzle faces the vehicle body circumferential direction. Each of the pneumatic nozzles is arranged.

  Further, in each of the above-described configurations, the mixed air nozzle and the non-air mixed nozzle are alternately arranged in the vehicle body circumferential direction.

  According to the chemical spray vehicle according to the present invention, the non-mixing type nozzle that ejects liquid droplets from the nozzle holes with a flat spray pattern and the mixed gas nozzle that ejects liquid droplets from the nozzle holes with a flat spray pattern are arranged around the vehicle body. Since they are mixedly arranged in the direction, the low-speed large droplets from the air-mixing nozzle are accelerated by the air blown from the chemical liquid spraying vehicle and discharged from the air outlet. In addition, high-speed medium droplets ejected from the non-air-mixing nozzle are also accelerated by the air blown by the chemical liquid spraying vehicle and discharged from the air outlet. Therefore, adhesion performance and / or reachability are increased. On the other hand, the medium droplets from the non-air-mixing nozzle are mixed with the large droplets from the air-mixing nozzle and are easily increased in size, thereby producing the effect of suppressing the occurrence of the drift phenomenon.

  In addition, in the case where the droplet ejection direction of the non-air-mixing nozzle is inclined backward in the vehicle body traveling direction with respect to the droplet ejection direction of the air-mixing nozzle, the droplets ejected from the air-mixing nozzle are air Since the liquid droplets ejected from the air outlet to the right direction in the vehicle traveling direction and ejected from the non-mixed nozzles are ejected backward in the vehicle body traveling direction, the liquid droplets ejected from each nozzle are related to the vehicle traveling direction. Dispersed without overlapping each other. When the spraying ranges of these non-overlapping droplets are summed up, a wide range of spraying is performed in the vehicle traveling direction comparable to conventional nozzles and drift reduction nozzles. Further, since the medium droplets from the non-air-mixing type nozzle are discharged without being sufficiently accelerated by the air blown by the chemical solution spraying wheel, the occurrence of the drift phenomenon can be suppressed.

  Then, the air-mixing nozzle and the non-air-mixing nozzle are arranged so that the major axis direction of the flat shape of the spray pattern of the droplets ejected from the air-mixing nozzle and the non-air-mixing nozzle is directed to the vehicle body circumferential direction. In this case, it becomes easy to shift the droplet ejection direction of different nozzles in the vehicle body traveling direction. Thereby, it is possible to further avoid the overlapping of the spray patterns with respect to the traveling direction of the vehicle body, and to spread a wide range in the traveling direction of the vehicle body without impairing the characteristics of the droplets ejected from each nozzle.

  Further, in the case where the air-mixing nozzle and the non-air-mixing nozzle are alternately arranged in the vehicle body circumferential direction, the spraying can be performed while the mixture of the spray patterns from each nozzle is made uniform.

It is a side view of the chemical | medical solution dispersion truck which concerns on Embodiment 1 of this invention. It is a rear view of the said chemical | medical solution dispersion wheel. The air-mixing type nozzle used for the said chemical | medical solution dispersion wheel is shown, (a) is a plane sectional view, (b) is a front view. The non-air-mixing type nozzle used for the said chemical | medical solution dispersion wheel is shown, (a) is a plane sectional view, (b) is a front view. It is a plane aspect figure which shows the operation | movement aspect of the said chemical | medical solution dispersion wheel. It is a figure which shows the result of the adhesion performance test by the liquid dispersion | distribution of the chemical | medical solution dispersion truck of the said Embodiment 1, and the chemical | medical solution dispersion truck of the comparative example 1. FIG. It is a figure which shows the result of the drift test by the liquid dispersion | distribution of the chemical | medical solution dispersion truck of the said Embodiment 1, and the chemical | medical solution dispersion truck of the comparative example 1. It is a figure which shows the covering area rate of the liquid adhering to each part of a test subject's body by the liquid dispersion | distribution of the chemical | medical solution dispersion truck of the said Embodiment 1 and the chemical | medical solution dispersion truck of the comparative example 1. FIG. The non-air mixing type nozzle used for Embodiment 2, 4, 5 of this invention is shown, (a) is a plane sectional view, (b) is a front view. (A)-(d) is a plane | planar aspect figure which each shows the operation | movement aspect of the chemical | medical solution dispersion vehicle which concerns on Embodiment 2-5. The mixed-type nozzle used for Embodiment 4 and 5 of this invention is shown, (a) is a plane sectional view, (b) is a front view. It is a rear view of the chemical | medical solution dispersion truck which concerns on Embodiment 6 of this invention. The conventional nozzle used for the chemical | medical solution dispersion vehicle of the comparative example 1 is shown, (a) is a plane sectional view, (b) is a front view. (A)-(d) is a plane | planar aspect figure which each shows the operation | movement aspect of the chemical | medical solution dispersion vehicle which concerns on Comparative Examples 1-4.

Embodiments of the present invention will be described with reference to the drawings. The embodiment described below is merely an example embodying the present invention, and does not limit the technical scope of the present invention.
[Embodiment 1].
FIG. 1 is a side view of a chemical spray vehicle according to Embodiment 1 of the present invention, and FIG. 2 is a rear view of the chemical spray vehicle.
In each of the drawings, the chemical liquid spraying vehicle 1 according to the first embodiment has a chemical liquid tank 3 mounted at a substantially central portion in the front and rear of a vehicle body 2 having four wheels, for example. An engine 11 is mounted behind the chemical liquid tank 3. The rear portion of the casing of the vehicle body 2 is connected to a cone-shaped wind guide member 10 that narrows backward. The wind guide member 10 is formed with a shaft hole (not shown) for passing the drive shaft 12 of the engine 11. A blower 9 is attached to the tip of the drive shaft 12 protruding rearward from the wind guide member 10. An outer peripheral case 4 is provided around the wind guide member 10 and the blower 9, and a ventilation path 5 is formed between the outer peripheral surface of the wind guide member 10 and the tip of the blower 9 and the inner peripheral surface of the outer case 4.

An air outlet 7 is provided between the front peripheral edge of the outer case 4 and the wind guide member 10. That is, the air outlet 7 is opened in the vehicle body circumferential direction from one side 15A of the vehicle body 2 to the other side 15B through the upper 15C. A central opening on the rear side of the outer case 4 is an air suction port 6, and the air suction port 6 is covered with a ventilation cover 8 so as to allow ventilation. Therefore, the air inlet 6 and the air outlet 7 communicate with each other via the ventilation path 5. The chemical liquid tank 3 is connected to the suction side of the pump 14 that sends the chemical liquid, and the discharge side of the pump 14 is connected to one end of the liquid guide pipe 13. The other end portion of the liquid guide pipe 13 is connected to a liquid guide pipe 16 having an arc shape in rear view provided in the air outlet 7. A plurality of liquid guide pipes 25, 25, 25,... Are branched and connected to the liquid guide pipe 16 at appropriate intervals in the circumferential direction. An air-mixing nozzle A or a non-air-mixing nozzle B is connected to the tip of each liquid guide tube 25. These air-mixing nozzles A and non-air-mixing nozzles B are alternately arranged in the vehicle body circumferential direction. The chemical spray vehicle 1 has a traveling speed of, for example, about 1 to 19 km / h, and an air flow rate of, for example, about 300 to 900 m ³ / min.

  As shown in FIG. 3, the air-mixing nozzle A includes a nozzle body 20 in which a liquid guide path 19 extends vertically, a disc-shaped injection plate 22 provided at the tip of the liquid guide path 19, and a liquid guide path. 19 is formed in the other end of the connection port 23 communicating with the liquid guide pipe 25 and the nozzle body 20 between the jet plate 22 and the connection port part 23 to take in air into the liquid guide path 19. And an inlet 35. The nozzle plate 22 has a nozzle hole 21 at the center of the disk. The jet plate 22 is fixed to the tip of the nozzle body 20 by a cap 34 with an O-ring 33 interposed therebetween. An orifice member 32 having an opening 30 is attached to the end of the liquid guide path 19. The connection port portion 23 of the nozzle body 20 is inserted into the opening on one end side of the joint member 24 together with the packing 27 and the two-hole packing 28, and is fixed by the cap 26. An air intake port 35 for taking a gas such as air into the liquid guide path 19 is formed on the inner wall of the nozzle body 20 on the outlet side of the orifice member 32 in the liquid guide path 19. A packing 29 is inserted into the opening on the other end side of the joint member 24 to connect the liquid introduction pipe 25.

  The air-mixing nozzle A has a fan shape (spray angle: about 30 to 45 °, see FIG. 2) when viewed in a direction perpendicular to the longitudinal direction of the bulge portion of the jet plate 22 and the axis Z of the nozzle 21. As a spray pattern P having a flat shape (see FIG. 3B) when viewed in the direction, droplets such as agrochemical liquid are ejected from the nozzle 21. The air-mixing nozzle A is a type in which a gas is mixed into the chemical liquid and injected in the middle of the nozzle main body 20, and the chemical liquid is linearly injected onto the center line (indicated by a one-dot chain line Z) of the nozzle main body 20. . The air-mixing nozzle A has a chemical spray amount of, for example, about 2 to 5 L / min, an in-use spray pressure of, for example, about 1.0 to 2.0 MPa, and an aeration amount of, for example, about 0 of the spray chemical amount. It is .2 to 1.5 times, and the application amount in the orchard or the like is, for example, 300 to 500 L / 10 are (spreading width of about 4 to 5 m, working speed of about 0.5 to 0.8 m / s). Whereas the conventional nozzle C (see FIG. 13) for a chemical spray vehicle sprays fine spray particles having an average spray particle size of about 90 to 100 μm, the air-mixing nozzle A has its air-mixing method and jet Coarse spray particles having an average spray particle size of about 300 to 400 μm are ejected by the coarse particle spray generation mechanism including the characteristic structure of the plate 22 and the characteristic shape of the nozzle hole 21. The air-mixing nozzle A is attached to the liquid guide tube 25 of the chemical liquid spraying vehicle 1 so that the droplet ejection direction is outward in the direction orthogonal to the vehicle body traveling direction (arrow Y direction).

  As shown in FIG. 4, the non-air-mixing nozzle B includes a nozzle body 20A having a liquid guide path 19A therein, a nozzle plate 22A provided at the tip of the liquid guide path 19A and having a nozzle 21A, and a liquid guide path. A connection port portion 23 formed at the other end of 19A and communicating with the liquid guide tube 25 is provided. The tip of the nozzle body 20A is formed by bending 15 degrees from the axis of the joint member 24 (shown by a one-dot chain line G). An orifice member 32A having an opening 30A is inserted into a large-diameter opening formed at the base of the nozzle body 20A and sealed by an O-ring 31. The other components are the same as those used for the mixed air nozzle A described above.

  The nozzle body 20A of the non-air-mixing nozzle B has a droplet ejection direction backward (in the direction of the arrow Y) with respect to the droplet ejection direction of the air-mixing nozzle A (outward in the direction perpendicular to the arrow Y). And attached to the liquid guide pipe 25 of the chemical liquid dispersion wheel 1 so as to be inclined by 15 degrees, for example. The non-air-mixing nozzle B has a fan shape (spray angle: about 30 to 45 °, see FIG. 2) when viewed in a direction perpendicular to the longitudinal direction of the bulge portion of the jet plate 22A, and the axial center of the nozzle 21A. As a spray pattern Q having a flat shape (see FIG. 4B) as viewed in the Z direction, droplets such as agrochemical liquid are ejected from the nozzle 21A. In the non-air-blown nozzle B, the chemical spray amount, the spray pressure during use, and the spray amount in the orchard etc. are substantially the same as in the case of the air-mix nozzle A. This non-air-mixing nozzle B has an average spray particle size of about 200 to 300 μm (air-mixing) due to the non-air-mixing method, the coarse particle spray generation mechanism comprising the characteristic structure of the injection plate 22A and the characteristic shape of the injection hole 21A. Coarse spray particles that are slightly finer than the case of the type nozzle A are sprayed.

  The mixed type nozzle A and the non-mixed type nozzle B are arranged so that the major axis direction (indicated by the arrow W) of the flat shape of the spray patterns P and Q of the droplets ejected from the respective nozzles is along the circumferential direction of the vehicle body. The However, these nozzles A and B are respectively arranged so that the longitudinal direction of the bulges of the jet plates 22 and 22A is inclined by 10 degrees from the longitudinal direction of the vehicle body (indicated by the arrow F). Thus, the spray patterns P and Q from the adjacent nozzles A and B are parallel to each other so as not to interfere with each other.

  The operation of the chemical liquid spraying vehicle 1 configured as described above will be described below. As shown in FIG. 5, the chemical solution spray vehicle 1 is used for a chemical spraying operation in an orchard or the like. In this case, the air-fueled nozzle A that injects spray droplets having a large particle diameter as a spray pattern P in a direction perpendicular to the vehicle body traveling direction, and the vehicle body travels by using spray droplets having a slightly smaller particle diameter than the spray pattern P as a spray pattern Q. .. Are alternately mounted in the circumferential direction of the vehicle body on the liquid guide pipes 25, 25, 25,.... In this case, a lot of very coarse particles having a spray average particle diameter of about 300 to 400 μm are ejected from the air-mixing nozzle A. On the other hand, a large amount of coarse particles having a spray average particle diameter of about 200 to 300 μm are ejected from the non-air-mixing nozzle B. In FIG. 5, for ease of understanding, spray patterns P and Q are shown only on the left side of the vehicle body 2 one by one. However, in actuality, spray patterns P, Q, P, Q, P, Q,. Needless to say,... Appears from one side 15A of the vehicle body 2 to the other side 15B via the upper side 15C. The same applies to FIGS. 10 and 14 described later.

According to the chemical liquid spraying vehicle 1 of the first embodiment, the large particles (P) of the low-speed spray from the air-mixing nozzle A are accelerated by the air blown from the chemical liquid spraying vehicle 1 and sideways from the entire circumference of the air outlet 7. To be released. On the other hand, since the medium particles (Q) of the high-speed spray from the non-air-mixing nozzle B are sprayed obliquely rearward, they are released without being sufficiently accelerated by the blowing of the chemical liquid spraying vehicle 1. For this reason, drift of the high-speed medium particles from the non-mixing nozzle B is suppressed, and adhesion and reachability are stabilized. The spread of the spray can cover a wide range in the vehicle body traveling direction corresponding to the later-described conventional nozzle C and drift reduction nozzle D by adding the spray areas of the two types of spray patterns P and Q together. The property is improved.
In this combination, even when the blower 9 of the chemical solution spraying vehicle 1 has a relatively low air volume, large particles of the low-speed spray from the low-reachability mixed-type nozzle A are accelerated by blowing, while the non-mixed-type nozzle B High-speed medium particles from are not accelerated by blowing. Therefore, the elements in which adhesion, reachability, and drift conflict are in an appropriate balance, and the structure having the highest adhesion performance among those capable of suppressing drift. That is, it can be said that the chemical solution spray vehicle 1 of the first embodiment is the most excellent configuration among all the embodiments.

Then, the chemical | medical solution dispersion | distribution vehicle 1 of Embodiment 1 was used, and the spraying chemical | medical solution adhesion performance test, the drift test, the worker exposure test, and the prevention | control effect test were done. The chemical spray vehicle 1 was diverted from a commercial vehicle (product number A-α602 manufactured by Maruyama Seisakusho Co., Ltd., tank capacity 600 L, variable in the range of air volume 300 to 600 m ³ / min). As a comparative example, a conventional chemical spraying vehicle (tank capacity 1000 L, air flow 740 m ³ / min and two-stage switching of 490 m ³ / min) mounted with a conventional nozzle C, which will be described in detail later, is used as a control machine as Comparative Example 1 Using. The set spray rate was 450 L / 10 ares (effective spray width 5 m, spray speed 0.7 m / s), which is the practice of the local field.

"Adhesion test":
In the canopy apple orchard at the Iwate Agricultural Research Center, within the crown of the measurement tree (1 tree) in the test area (5m between trees x 5m between rows x 45m x 3 rows, tree height approx. 4m, variety: Fuji) Water sensitive paper is placed at a total of 16 locations at a height of 0.5 m, 1.5 m, 2.5 m, and 3.5 m from the ground, and 0.5 m away from the center of the trunk. Horizontal top / bottom and vertical left / right surfaces were installed as water adhesion surfaces. In the test, fresh water was sprayed from both sides of all three target trees, water sensitive paper was collected immediately after spraying, and the droplet adhesion status was visually indexed and tabulated based on the standard adhesion index.
As shown in FIG. 6, the adhesion index by the chemical spray vehicle 1 of the first embodiment is almost the same level as when the chemical spray vehicle of Comparative Example 1 is used even at a low air volume of 300 to 500 m ³ / min. It was confirmed that the same level of adhesion performance could be secured.

"Drift test":
Three measurement rows (with a space of 5 m or more) were installed in which water sensitive paper was arranged on a straight line at intervals of 5 m in the leeward direction at a distance of 10 to 30 m from the spray field boundary in the leeward direction. After spraying on the whole tree rows, the coverage area ratio of the adhered liquid spots relative to the entire area of the test surface was measured by image processing from the collected water sensitive paper.
According to the chemical solution spraying vehicle 1 of the first embodiment, as shown in FIG. 7, the drift can be suppressed to approximately half or less when the chemical solution spraying vehicle of Comparative Example 1 is used at any distance. Thus, it turns out that the chemical | medical solution dispersion vehicle 1 of Embodiment 1 is excellent in both adhesion performance and the drift reduction effect.

"Worker exposure":
Sensation collected after spraying and applying water-sensitive paper to each measurement point on the top of the operator's head, face (front edge of hat), back of head (back edge of hat), left shoulder, right shoulder, back, abdomen, left knee, and right knee. The coverage area ratio of the adhesion liquid spots with respect to the whole test surface area was measured from water paper.
According to the chemical spray vehicle 1 of the first embodiment, as shown in FIG. 8, the coverage ratio of the adhesion liquid spots on the water-sensitive paper at the exposed measurement site is suppressed to less than half that in the case of the chemical spray vehicle of Comparative Example 1. In addition, it was confirmed that the use of the chemical solution disperser 1 according to Embodiment 1 can also suppress the worker exposure.

"Control effect test":
In the garden, the chemical spray vehicle 1 of the first embodiment is installed with three test zones with an air volume of 600 m ³ / min, 500 m ³ / min, and 300 m ³ / min. These three test zones and the chemical spray vehicle of Comparative Example 1 are installed. In the local customary control zone using the mitochondrion, the control effect against the spider mite was investigated by the two spraying of the acaricide (the second spraying was performed one month after the first one).
The control effect by the acaricide spraying using the chemical spray vehicle 1 of the first embodiment is almost the same as the case of using the chemical spray vehicle of Comparative Example 1 with almost 1 head / leaf or less, although the occurrence condition is small. . In particular, the control effect under the condition of an air volume of 500 m ³ / min by the chemical spray vehicle 1 is not much different from the case of using the chemical spray vehicle (the air volume of 740 m ³ / min) of Comparative Example 1 and is controlled even at a low air flow rate. The effect was maintained.

[Embodiment 2].
In the first embodiment, the non-air mixture type nozzle B inclined backward from the direction orthogonal to the vehicle body traveling direction is used. However, the present invention is not limited to this, and the non-air mixture type nozzle B is used. In other words, for example, the non-mixing nozzle B1 shown in FIG. 9 can be used. This non-air-mixing nozzle B1 is non-air-mixing except that the nozzle body 20B is formed in a straight line and has a straight liquid introduction path 19, and the orifice member 32A and the O-ring 31 are omitted. The configuration of the type nozzle B is the same. Further, the spray pattern from the non-mixing nozzle B1 is almost the same as the spray pattern Q from the non-mixing nozzle B, and is perpendicular to the vehicle body running direction (arrow Y direction) as shown in FIG. It is jetted outward. In this case, a large amount of coarse particles having a spray average particle diameter of about 200 to 300 μm are ejected from the non-air mixture type nozzle B1 adopting a non-air mixture type structure.

  According to the chemical solution spraying vehicle 1 of the second embodiment, large particles from the mixed-type nozzle A that is a low-speed spray with a mixed-type structure and a non-mixed-type nozzle B1 that is a high-speed spray with a non-mixed type structure. The middle particles overlap, and are accelerated by the air blown from the chemical solution spraying vehicle 1 and discharged laterally from the entire circumference of the air outlet 7. Therefore, the high-speed medium particles from the non-mixing nozzle B1 are sufficiently accelerated, so that the adhesion and reachability are excellent. However, the accelerated medium particles tend to drift. Further, the spread of the spray is somewhat narrower in the vehicle body traveling direction than the cone-type spray pattern R (FIG. 14A) from the conventional nozzle C.

[Embodiment 3].
As shown in FIG. 10 (b), the chemical solution spraying vehicle 1 of Embodiment 3 inverts all non-air-mixing nozzles B, B, B,. Except for being attached to 25, 25, 25,..., The configuration is the same as in the first embodiment.
According to the chemical liquid spraying vehicle 1 of the third embodiment, the large particles of the low-speed spray from the air-mixing nozzle A are accelerated by the air blown by the chemical liquid spraying vehicle and discharged from the entire circumference of the air outlet 7 to the side. . On the other hand, since the medium particles of the high-speed spray from the non-mixing nozzle B are sprayed diagonally forward from the entire circumference of the air outlet 7, the air is not sufficiently accelerated by the air blown by the chemical spray vehicle 1, and the chemical spray is further performed. Air resistance due to the air flow accompanying the traveling of the vehicle 1 is received. For this reason, the high-speed intermediate particles from the non-mixing nozzle B are suppressed from drifting, but reachability is impaired and the spread of the spray is also reduced. For this reason, adhesion and reachability are somewhat inferior to those of the first embodiment.

[Embodiment 4].
In the first to third embodiments, an example in which the mixed air nozzle A is used as the mixed air nozzle has been shown. However, in the present invention, instead of the mixed air nozzle A, for example, FIG. 11 and FIG. It is also possible to use the air-mixing nozzle A1 shown. The air-mixing nozzle A1 is formed such that the tip of the nozzle body 20A is inclined 15 degrees from the axis G of the joint member 24. Accordingly, the axis Z of the liquid guide channel 19A is also from the axis G of the joint member 24. Tilt 15 degrees. Other configurations are the same as those of the second embodiment. A lot of very coarse particles having a spray average particle diameter of about 300 to 400 μm are ejected from the air-mixing nozzle A1.
Therefore, according to the chemical liquid spraying vehicle 1 of the fourth embodiment, the large particles of the low-speed spray from the air-mixing nozzle A1 are sprayed obliquely rearward, so that they are released without being sufficiently accelerated by the blowing of the chemical liquid spraying vehicle. Is done. On the other hand, the middle particles of the high-speed spray from the non-air-mixing nozzle B1 are sufficiently accelerated by the air blown by the chemical solution spraying vehicle and discharged sideways from the entire circumference of the air outlet 7. For this reason, large particles of the low-speed spray from the air-mixing nozzle A1 are less likely to drift, but are somewhat inferior in reachability as compared with the first embodiment. In addition, the high-speed medium particles from the non-mixing nozzle B are sufficiently accelerated and reachability is increased, but somewhat drift is likely to occur as compared with the first embodiment.

[Embodiment 5].
As shown in FIG. 10 (d), the chemical spray vehicle 1 of the fifth embodiment is configured to invert all the air-fuel mixture type nozzles A1, A1, A1,. , 25, 25,..., Except that they are configured in the same manner as in the fourth embodiment.
Therefore, according to the chemical spray vehicle 1 of the fifth embodiment, the large particles of the low-speed spray from the air-mixing nozzle A1 are sprayed obliquely forward, so that they are not sufficiently accelerated by the blowing of the chemical spray vehicle, In addition, it is subject to resistance from the airflow associated with the traveling of the chemical spray vehicle. On the other hand, the medium particles of the high-speed spray from the non-air-mixing nozzle B are sufficiently accelerated by the air blown by the chemical solution spraying wheel and discharged sideways from the entire circumference of the air outlet 7. For this reason, large particles of the low-speed spray from the air-mixing nozzle A1 are less likely to drift, but the reachability is inferior and the spread of the spray is also reduced. For this reason, compared with Embodiment 1, adhesion and reachability are somewhat inferior. Further, the high-speed medium particles of the non-mixing nozzle B ”are sufficiently accelerated and reachability is increased, but somewhat drift is likely to occur as compared with the first embodiment.

[Comparative Example 1].
FIG. 13 shows a conventional nozzle C that has been used in a chemical solution sprayer. This conventional nozzle C has a non-mixed structure, and a nozzle plate 73 having a nozzle hole 74 is fixed together with an O-ring 33 at the tip of a nozzle main body 72 having a liquid introduction path inside, and the nozzle main body 72 has A joint member 75 attached to the other end is connected to the liquid guide pipe 25 by a cap 26. In the nozzle main body 72, a liquid swiveling member 76 that rotates the chemical liquid flowing in the liquid introduction path and sends it to the nozzle hole 74 is provided. The shaft center of the nozzle hole 74 is oriented in a direction perpendicular to the traveling direction of the vehicle body in a state where it is attached to the chemical spraying wheel. From this conventional nozzle C, spray droplets are ejected from the nozzle hole 74 in a so-called cone-shaped spray pattern R having a hollow cone shape. The spray average particle diameter is about 90 to 100 μm, and there are many relatively fine particles.
Therefore, according to the chemical liquid spraying vehicle of the first embodiment, fine particles are sprayed at high speed from the conventional nozzle C having a non-mixed structure, and further accelerated by the air blown by the chemical liquid spraying vehicle, from the entire circumference of the air outlet 7. Released to the side. For this reason, both adhesion and reachability are excellent, but a large amount of drift is likely to occur.

[Comparative Example 2].
As shown in FIG. 14B, this comparative example 2 is a comparative example, except that all the conventional nozzles C, C, C,... Are replaced with drift reduction nozzles D, D, D,. 1 is configured in the same manner. These drift reduction nozzles D have an air-mixing structure, and mainly spray coarse particles having an average spray particle size of about 200 to 300 μm at a low speed with a so-called cone-shaped spray pattern S.
Therefore, according to the chemical solution spraying vehicle of Comparative Example 2, coarse particles are sprayed at a low speed from the drift reducing nozzle D having the mixed gas structure, and this is accelerated by the air blown by the chemical solution spraying vehicle, and from the entire circumference of the air outlet 7. Released to the side. For this reason, drift does not easily occur, but both adhesion and reachability are inferior to those of the conventional nozzle C.

[Comparative Example 3].
In Comparative Example 3, as shown in FIG. 14 (c), all the conventional nozzles C, C, C,... Are replaced with the above-described mixed-type nozzles A, A, A,. Other than that, the configuration is the same as that of Comparative Example 1.
Therefore, according to the chemical liquid spraying vehicle of Comparative Example 3, very coarse particles are sprayed at a low speed from the mixed gas type nozzle A having the mixed gas structure, and this is accelerated by the air blown by the chemical liquid spraying vehicle, and the air outlet 7 is discharged sideways from the entire circumference. For this reason, drift does not easily occur, but the reachability of the chemical solution is poor. Compared with the drift reduction nozzle D, which is a cone-shaped spray pattern S, the air-mixing nozzle A has a fan-shaped spray pattern P, so that the spray density is high and the speed is slightly high, so that reachability is superior. . However, the air-fueled nozzle A may have poor adhesion because the spread of spray is narrow in the vehicle body traveling direction. Therefore, compared with the conventional nozzle C, both adhesion and reachability are inferior.

[Comparative Example 4].
In this comparative example 4, as shown in FIG. 14 (d), all the conventional nozzles C, C, C,... Were replaced with the non-mixing nozzles B, B, B,. Except for this, the configuration is the same as in Comparative Example 1.
Therefore, according to the chemical spray vehicle of Comparative Example 4, coarse particles are sprayed at high speed from the non-mixed nozzle B having a non-mixed structure, and this is only slightly accelerated by the blowing of the chemical spray vehicle. It is discharged obliquely backward from the entire circumference of the air outlet 7. For this reason, drift hardly occurs, but the reachability is excellent because the spraying speed is high. However, since the spread of the spray is narrower in the traveling direction than the cone-shaped spray pattern R and spray pattern S, the adhesion is poor.

[Embodiment 6].
As shown in FIG. 12, the chemical spray vehicle 1 of the sixth embodiment is provided with a plurality of wind direction plate units 40, 40, 40,... Outside the nozzles N, N, N,. Except for this, the configuration is the same as in the first to fifth embodiments. Each nozzle N is any one of the mixed air nozzles A and A1 or the non-air mixed nozzles B and B1 described above. Each wind direction plate unit 40, a pivot shaft 41 attached to the vehicle body 2, a wind direction plate 42 that is rotatably supported by the pivot shaft 41 and swings in the left-right direction, and drives the wind direction plate 42 to swing. And a drive source 43 such as a motor. Furthermore, the control apparatus 44 which drives the drive source 43 of each wind direction board unit 40 and controls the rocking | swiveling angle of each wind direction board 42 separately is provided.

According to the chemical solution spray vehicle 1 of the sixth embodiment, the control device 44 adjusts the swing angle of the wind direction plate 42 of each wind direction plate unit 40. For example, consider a case where the spraying operation is performed while traveling between the outermost tree row 45A and the second tree row 45B from the outside in the garden. In this case, the control device 44 drives each wind direction plate 42 of the wind direction plate units 40, 40, 40 on the left side in the vehicle traveling direction, for example, so as to be inclined sideways. As a result, a large amount of air is sent from the air outlet 7 to the second row of trees 45B vigorously, and the chemical solution can be reliably sprayed. On the other hand, the control device 44 drives each wind direction plate 42 of the wind direction plate units 40, 40, 40 on the right side in the vehicle traveling direction to stand in the vertical direction. Thereby, very weak ventilation is sent toward the outermost tree row 45A, or the ventilation is stopped by closing the air outlet 7. Therefore, even when another person's garden is in the adjacent land outside the tree line 45A, it is possible to solve the problem that the chemical solution reaches the other person's garden. That is, various modes of spraying work can be freely selected with good applicability.
In this embodiment, an example is shown in which three wind direction plates 42 are provided at the left and right side positions of the nozzles N, N, N,..., But the number of installed wind direction plates 42 is not limited to the above. Moreover, you may arrange | position the wind direction plates 42, 42, 42 ... in the upper position of a nozzle N, N, N, ... row | line | column. In the above description, the swing angle of each wind direction plate 42 is individually controlled. However, the wind direction plates 42, 42, 42... Are grouped, and the wind direction plates 42, 42, 42,. -May be swung in the same control form.

  In the first to sixth embodiments described above, the mixed-type nozzles and the non-mixed-type nozzles are alternately arranged in the vehicle body circumferential direction. However, in the present invention, these are not necessarily arranged alternately. Alternatively, it may be “mixed” in the vehicle body circumferential direction. In the “mixing” as a mode in which such an air-mixing nozzle and a non-air-mixing nozzle are arranged in the circumferential direction of the vehicle body, for example, two air-mixing nozzles are arranged, and then 2 non-air-mixing nozzles are arranged. A mode is also included in which a single air-mixing nozzle and a non-air-mixing nozzle are arranged next. Of course, “alternating” is a concept included in “mixed”.

DESCRIPTION OF SYMBOLS 1 Chemical liquid dispersion | distribution vehicle 2 Car body 3 Chemical liquid tank 5 Ventilation path 6 Air inlet 7 Air blower outlet 9 Blower 15A One side 15B Other side 15C Upper 19, 19A Liquid guide path 20, 20A, 20B Nozzle main body 21, 21A Nozzle 22 , 22A Spray plate 23 Connection port 24 Joint member 25 Liquid introduction pipe 35 Air intake port A, A1 Mixed air nozzle B, B1 Non-air mixed nozzle G Dash-dotted line P Spray pattern Q Spray pattern W Arrow Y Arrow Z Axis

Claims (4)

Provided with an air passage that communicates an air inlet provided at the rear of the vehicle body equipped with a chemical tank and an air outlet opening in the circumferential direction of the vehicle body from one side of the vehicle body to the other side In the chemical spray vehicle in which a blower is provided in the ventilation path, and a plurality of nozzles are arranged in the circumferential direction of the vehicle body with the plurality of nozzles radially outward at the air outlet,
As the nozzle,
Nozzle body having a liquid guide path therein, a nozzle plate provided at the tip of the liquid guide path and having a nozzle hole, and a connection port formed at the other end of the liquid guide path and connected to the liquid guide pipe from the chemical tank A non-air-mixing nozzle that ejects liquid droplets from the nozzle hole in a flat spray pattern as viewed in the axial direction of the nozzle hole,
and,
Nozzle body having a liquid guide path therein, a nozzle plate provided at the tip of the liquid guide path and having a nozzle hole, and a connection port formed at the other end of the liquid guide path and connected to the liquid guide pipe from the chemical tank And an air intake portion that is formed in the nozzle body between the nozzle plate and the connection port portion and takes air into the liquid guide path, and drops in a flat spray pattern as viewed in the axial direction of the nozzle port Using an air-mixing nozzle that spouts out the nozzle,
A non-air-mixing nozzle and the air-mixing nozzle are arranged so as to be mixed in the vehicle body circumferential direction. 2. The chemical solution spraying according to claim 1, wherein the liquid droplet ejection direction of the non-air mixture type nozzle is set to be a direction inclined backward in the vehicle body traveling direction with respect to the liquid droplet ejection direction of the air mixture type nozzle. car. The mixed-type nozzle and the non-mixed-type nozzle are respectively arranged so that the major axis direction of the flat shape of the spray pattern of the droplets ejected from the mixed-type nozzle and the non-mixed-type nozzle faces the vehicle body circumferential direction. The medicinal solution spraying vehicle according to claim 1 or 2, characterized in that. 4. The chemical spray vehicle according to claim 1, wherein the mixed air nozzle and the non-air mixed nozzle are alternately arranged in a circumferential direction of the vehicle body. 5.

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