JPH01171668A - Spreader of pharmaceutical for agriculture - Google Patents

Abstract

PURPOSE:To perform uniform spreading in a large spreading width by forming the end part of the discharge port side of a cylindrical casing member into a specified shape sand providing nozzles to the outer peripheral part thereof at proper intervals toward the flow direction of wind from the discharge port. CONSTITUTION:The wind generated with a blower 58 is advanced along the inner surfaces of cylindrical casing members 44, 48 and throttled because of the tapered shape of the end part of a discharge port side and accelerated and thereafter discharged through the discharge port 70. On the other hand, pharmaceutical is jetted in an atomized state through the nozzles 76 provided to the outer peripheral parts of the cylindrical casing members 44, 48 and carried while riding on the wind sent through the discharge port 70. Therein since the upper end part of the discharge port 70 is projected longer than the lower end part and also this discharge port is formed into a cutting edge face cut slantly for the center line of the members 44, 48 the wind of the upper part is throttled to the central direction and also directed to the lower end and nearly continuously lowered and therefore wide spread is performed in nearly uniform distribution.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to large-scale pest control of rice fields, etc. (spraying width of about 100 m)
The present invention relates to an agricultural chemical spraying device used for agricultural chemicals, etc., and specifically relates to an improvement of the ventilation section of an agricultural chemical spraying device.

[Conventional technology]

Figures 10 to 20 show large-scale control of rice fields, etc. (spraying agreement L).
Regarding the conventional agricultural chemical spraying device used in the agricultural chemical spraying device (see the figure below), the conventional technology will be described with reference to these figures.

FIG. 10 is a schematic plan view of a blowing section 10a whose end on the discharge port side has a first shape example, and FIG. 11 is a schematic plan view of the blowing section 10a of FIG.
It is a figure which looked at the discharge port 16 of a in the centerline direction of the ventilation part 10a. The blowing section 10a has a substantially cylindrical fan casing 1.
2, and an inlet 14 and an outlet 16 are formed at both ends of the fan casing 12, respectively. The movable blade 18 and the stator blade 20 are arranged in the fan casing 12 so that the movable blade 18 is closer to the suction port 14 than the stator blade 20, and the rotation of the rotor blade 18 as a blower causes the fan casing to move from the suction port 14. Air is drawn into the fan casing 12, rectified by the stator blades 20, and discharged from the discharge port 16 to the outside of the fan casing 12.The discharge port 16 has a cut surface substantially perpendicular to the centerline of the fan casing 12. It has a circular shape.

FIG. 12 is a schematic plan view of a blower lOb whose end on the outlet side has a second shape example, and FIG. 13 is a schematic plan view of the blower 10 of FIG. 12.
It is a figure which looked at the discharge port 16 of b in the center line direction of the ventilation part 10b. The discharge side casing 22 is connected to the downstream end of the fan casing 1z so that its center line coincides with the center line of the fan casing 12, and has a truncated conical shape that constricts toward the discharge port 16.

The discharge port 16 has a circular cut surface that is substantially perpendicular to the center line of the fan casing 12 and the discharge side casing 22.

FIG. 14 is a schematic plan view of the blowing section 10c whose end on the discharge port side has a third shape example, and FIG. 15 is a schematic plan view of the blowing section 10c shown in FIG.
It is a figure which looked at the discharge port 16 of c in the center line direction of the ventilation part 10c. The projecting portion 24 is formed at the lower part of the discharge side casing 22 so as to project downward, and opens at the discharge port 16, so that the discharge port 16 has a lower protrusion.

Figures 16 and 17 show the blower section 1 of an agricultural chemical spraying device.
An example of how the nozzle 28 is attached at 0a is shown.

In FIG. 16, an annular nozzle pipe 26 extending around one circumference is arranged inside the fan casing 12 in the vicinity of the discharge port 16, and a plurality of nozzles 28 are arranged in the annular nozzle pipe 26 at equal intervals in the circumferential direction. attached and directed toward the discharge port 16.

In FIG. 17, an annular nozzle pipe 30 extending circumferentially is fixed to the outer periphery of the end of the fan casing 12 on the side of the outlet 16 in the vicinity of the outlet 16, and a plurality of nozzles 32 are arranged in the circumferential direction. They are attached to the annular nozzle pipe 30 at equal intervals and are directed toward the discharge port 16.

[Problem that the invention seeks to solve]

Figures 18, 19, and 20 are Figure 10, respectively.
14 is a graph showing the relationship between the distance from the discharge port 16 and the amount of chemical liquid dropped by the air blower in FIGS. 12 and 14. FIG.

In the blowing section 10a of FIG. 10, the air emitted from the discharge port 16 is diffused in a direction away from the center line of the blowing section 10a, so as shown in FIG. It becomes shorter.

In the blowing section 10b of FIG. 12, the air is constricted by the tapered discharge side casing 22, so the diffusion of the air coming out of the discharge port 16 is suppressed, but as shown in FIG.
The medicinal solution does not fall into the area near the inlet 14. Further, when the wind from the discharge port 16 uniformly decelerates due to the resistance of the outside air, and the wind speed decreases to a predetermined value.

Since the chemical liquid falls to the ground surface, the falling chemical liquid concentrates in the range B far from the discharge port 16, and the uniformity of the dispersion is poor.

In the blowing section 10c of FIG. 14, the amount of the chemical solution falling into the area near the discharge port 16 increases due to the addition of the overhanging portion 24, compared to the blowing section 10b of FIG. 12, but as shown in A of FIG. There is a weak part of the wind where the wind is
As shown in Figure 0, the amount of the chemical solution falling in the middle range C is smaller than in the nearer and farther ranges D, and the distribution density of the drug solution becomes uneven.

In FIG. 16, the annular nozzle pipe 26 and the nozzle 28 are connected to the rotor blade 1.
8, the wind resistance decreases, and the reach of the chemical solution decreases. This resistance increases as the number of nozzles 28 increases.

When the diameter of the sprayed chemical particles increases, the weight of the sprayed particles increases, making it impossible for them to travel sufficiently with the wind.

For example, in the case of a reach-type nozzle with a large hole in the spray plate, the distance that can be reached without being conveyed by wind is limited to 25 m, and even if conveyed by the wind of a blower, It can only extend 5 to 10 meters at most. Therefore, it is necessary to reduce the pore diameter of the spray plate in order to reduce the diameter of the spray particles, but if the pore diameter of the spray plate is made smaller, the number of nozzles required to secure the necessary spray flow rate increases accordingly. For example, the moving speed of the agricultural chemical spraying device is 1.5km/h, the spraying width is Loom, and the spraying amount is 100Q/h.
For large-scale pest control in the case of 10 a, the required total flow rate of chemical spray from all nozzles would be 187 Q/min.

Therefore, it is disadvantageous that the number of attached nozzles is small.

In FIG. 17, the annular nozzle pipe 30 and the nozzle 32 are connected to the rotor blade 1.
However, since the circumference of the discharge port 16 is short, there is a limit to the number of nozzles 32 that can be attached.

The purpose of this invention is to solve the problems mentioned above, and to increase the scattering width,
To provide an agricultural chemical spraying device capable of uniformly spraying a chemical solution and capable of attaching many nozzles.

[Means for solving problems]

Six cylindrical casing members (44
, 48) have an inlet (50) and an outlet (50) at both ends, respectively.
A six blower (58) having a blower (70) is disposed within the cylindrical casing member (44, 48) and has a suction port (50).
The air sucked in from the outlet is sent to the outlet (70). The discharge port side end of the cylindrical casing member (44, 48) is connected to the discharge port (70
), and the discharge port (70) has a cut surface whose upper end protrudes relative to the lower end and is oblique to the center line of the cylindrical casing member (44, 48). Ru. The nozzles (76) are disposed at appropriate intervals along the periphery of the discharge port (70) at the outer periphery of the discharge port side end facing in the direction in which the air flows from the discharge port (70).

[Effect]

The air generated by the blower (58) travels along the inner surface of the cylindrical casing member (44, 4111) and is throttled due to the tapered end of the cylindrical casing member (44, 48) on the outlet side. The speed is increased, and then the discharge port (70)
It is discharged from. The chemical liquid is supplied to the cylindrical casing member (44,
48) is ejected in the form of a spray from a nozzle (76) on the outer periphery, and is carried by the wind from the discharge port (70).

Since the upper end of the discharge port (70) protrudes from the lower end, the upper air at the discharge port (70) is constricted toward the center line of the cylindrical casing member (44, 48), and the upward wind is Diffusion is suppressed.

The discharge port (70) is connected to the cylindrical casing member (44, 48)
Since the cut surface is diagonal to the center line of the outlet (70), the air is not restricted to the lower side of the outlet (70).
Air is discharged from the discharge port (70), and the wind speed at the discharge port (70) decreases almost continuously from the upper end to the lower end of the discharge port (70). When the velocity at the discharge port (70) is low, it is quickly decelerated to a certain value due to resistance with the outside air. Therefore, the distance over which a certain partial burst of wind from the outlet (70) is decelerated to a predetermined value due to the resistance of the outside air is distributed almost evenly over a range from near the outlet (70) to far away.

〔Example〕

Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.

FIGS. 5 and 6 are a side view and a rear view of the agricultural chemical spraying device 36 as a whole. Agricultural chemical spray equipment vi
36 is 1. For example, large-scale control of rice fields, etc. (approximately Loom spray width)
), and is installed on agricultural tractors, trucks, water tankers, etc. as self-propelled carts. Turntable 38
is arranged facing upward and is rotatable around a vertical line by means of a predetermined drive means. pair of arms 4
0.40 is fixed to the side of the rotary table 38 at the lower end and protrudes upward in an inverted "8" shape. The blower section 42 is
The arm 40 is disposed between the upper ends of the arm 40.
．． 40 is rotatably connected to the upper end thereof. A telescopic hydraulic cylinder 43 has one arm 4 at its upper and lower ends.
0 and the outside of the blower section 42 so as to be rotatable. The direction of the blower section 42 is adjusted by the rotation of the five-turn table 38, and the arm 40.
The angle of inclination can be adjusted by rotating around the horizontal line connecting the upper ends of 40. Note that during the spraying of the chemical solution, the blowing section 42 is directed laterally with respect to the traveling direction of the agricultural chemical spraying device 36.

FIG. 7 is a detailed longitudinal cross-sectional view of the blower section 42 with the distal end side of the discharge side casing 48 omitted, and FIG. 8 is a cross-sectional view taken along the line ■-■ in FIG. 7. The cylindrical casing outer cylinder 44 is connected to a bell mouth 46 and a discharge side casing 48 at both ends in the axial direction, and the suction port 50 is connected to the bell mouth 46.
is formed. The hydraulic motor 52 is disposed within a casing inner cylinder 54 that is substantially concentric with the casing outer cylinder 44, is fixed to a circumferential fixed plate 55 that projects inward from the inner surface of the casing inner cylinder 54, and is connected to hydraulic piping. Hydraulic pressure is supplied and discharged from the outside of the blower section 42 via 56 . Moving blade 58
is the casing inner cylinder 54 inside the casing outer cylinder 44
is arranged on the bell mouth 46 side adjacent to the hydraulic motor 5.
It is fixed to the output shaft of No.2. The hemispherical hub 60 is
The center portion of the moving blade 58 is covered from the suction port 50 side. The stationary blade 62 is integrally formed on the outer peripheral surface of the casing inner cylinder 54.
and rectifies the wind from the motor 'R58.

FIG. 9 is a hydraulic circuit diagram for driving the hydraulic motor 52. The prime mover 64 consists of an engine, an electric motor, etc.
The hydraulic pump 66 is driven, and the hydraulic piping 56 is connected to the hydraulic motor 5.
2 and a hydraulic pump 66, the hydraulic medium circulates in a fixed direction within the hydraulic piping 56. Hydraulic motor 52 rotates rotor blades 58 using hydraulic pressure supplied from hydraulic pump 66 .

FIG. 1 is a longitudinal cross-sectional view of the entire blowing section 42. As shown in FIG. The discharge side casing 48 is connected to the downstream end of the casing outer cylinder 44 so that its center line coincides with that of the casing outer cylinder 44, and has a tapered shape that tapers toward the distal end, and has a discharge lower end at the distal end. 0 is formed.

FIG. 2 shows a cut surface of the discharge side casing 48 forming the discharge lower 0. As shown in FIG. The discharge side casing 48 has a circular bottom surface 12
The discharge lower 0 has a cut surface oblique to the center line of the discharge side casing 48 .

Returning to FIG. 1, the discharge lower 0 is oblique with respect to the center line of the casing outer cylinder 44 and the discharge side casing 48.

The upper end side protrudes from the lower end side. The annular nozzle pipe 74 extends annularly along the circumference of the discharge lower 0 on the outer peripheral side of the edge of the discharge lower casing 48 on the discharge lower 0 side. The plurality of nozzles 76 are attached to the annular nozzle pipe 74 at appropriate intervals along the circumference of the annular nozzle pipe 74.
It is directed towards the wind from the sky.

Each nozzle 76 has a spray plate with a small diameter hole therein, is supplied with a chemical liquid through the annular nozzle pipe 74, and ejects the chemical liquid as a small diameter spray. Nozzle 76 installed on the upper side
The angle with respect to the center line of the discharge side casing 48 becomes larger as the discharge side casing 48 increases, so that the sprayed chemical liquid from each nozzle 76 is made to enter the wind discharged from the discharge lower 0 at a constant angle.

The operation of the illustrated embodiment will be explained.

The wind generated by the rotor blades 58 as a blower travels along the inner surface of the casing outer cylinder 44 and the discharge side casing 48, is narrowed due to the tapered shape of the discharge side casing 48, and is increased in speed. , is discharged from discharge lower 0. The chemical liquid is ejected in the form of a spray from a nozzle 76 located on the outer periphery of the casing outer cylinder 44 and the discharge side casing 48, and is conveyed by the wind from the discharge lower 0.

The upper end of the discharge lower 0 protrudes from the lower end, so
The upper air at the discharge lower 0 flows through the cylindrical casing member (4
4, 48), and the upward diffusion of the wind is suppressed.

Since the discharge lower 0 has a cut surface cut diagonally with respect to the center line of the discharge side casing 48, the wind is not restricted to the lower side of the discharge lower 0, and is discharged from the discharge lower 0. The wind speed at the discharge lower 0 decreases almost continuously from the upper end to the lower end of the discharge lower 0. When the velocity at discharge lower 0 is low, it is quickly decelerated to a certain value due to resistance with the outside air. Therefore, the distance over which a certain portion of the wind from the discharge lower 0 is decelerated to a predetermined value due to the resistance of the outside air is distributed almost evenly over a range from near the discharge lower 0 to far away.

FIG. 3 shows a modification of the shape of the discharge side casing 48 shown in FIGS. 1 and 2. In FIG. The projecting portion 78 projects downward and is provided at the lower part of the discharge side casing 48b, and opens at the tip as a lower protrusion 80 of the discharge lower 0.

The lower protrusion 80 also sends an appropriate amount of wind to the ground surface area immediately adjacent to the discharge lower 0, ensuring that the chemical solution is sprayed in that area. The discharge lower 0 has a cut surface including the cut surface of the lower protrusion 80, which is a plane oblique to the center line of the discharge side casing 48b.

FIG. 4 is a longitudinal cross-sectional view of the entire blowing section 42 to which the reaching type nozzle device 82 is attached. The reach-type nozzle device 82 is attached to the lower part of the blower section 42 near the lower end of the discharge lower 0, and has a plurality of nozzles 84.

Nozzle 84 has a larger nozzle hole than nozzle 76.

The nozzles 84 on the proximal end side are directed downward, and the most advanced nozzles 84 are directed almost horizontally, and the jet from each nozzle 84 reaches the ground surface by the spray power without relying on the wind from the discharge lower 0. . Since the spraying of the chemical liquid in the ground range near the discharge lower 0 is ensured by the reaching type nozzle device 82, the spraying range of the chemical liquid by the wind from the discharge lower 0 must be specified to be a range farther than the spraying range by the reaching type nozzle device 82. This makes it possible to increase the overall dispersion width. Further, since the crops in the area where the chemical solution is sprayed by the reaching type nozzle device 82 are not exposed to the wind from the discharge lower 0, wind damage can be prevented.

〔Effect of the invention〕

As described above, according to the present invention, the end of the cylindrical casing member on the side of the discharge port is formed in a tapered shape constricting toward the discharge port, and the discharge port has an upper end protruding from a lower end and a cylindrical shape. The cut surface is oblique to the center line of the shaped casing member. Therefore, the wind inside the discharge port side end of the cylindrical casing member is more constricted and discharged from the discharge port as it is on the upper side, and the velocity distribution of the wind at the discharge port decreases almost continuously from the upper end to the lower end. Become something. As a result, the distance at which the wind from the discharge port is decelerated to a predetermined value due to the resistance of the outside air is distributed almost evenly from near the discharge port to far away, and the air is carried and dispersed by such wind. The amount of chemical liquid also becomes uniform over a range from near the ejection port to far away.

The area near the outlet is hit by slow-moving wind from the bottom of the outlet, i.e., weak wind.

Wind damage to crops is suppressed.

The upper end of the discharge port side end protrudes from the lower end, and the wind from the discharge port is prevented from spreading upward, thereby increasing the spray width.

Since the nozzle is disposed outside the cylindrical casing member, there is no resistance to the wind generated by the blower, and strong wind can be discharged from the discharge port.

The discharge port has a cut surface that is oblique to the center line of the conical cylindrical casing member.

The circumference of the discharge port increases. Since the nozzles are arranged along the circumference of the discharge port at the outer periphery of the discharge port side end, the total number of nozzles that can be attached increases. therefore,
Even when a nozzle with a small hole diameter is used to improve the reach of the spray, the necessary spray flow rate can be ensured.

In this invention, since the speed of the wind discharged from the lower part of the discharge port is low, the wind force hitting the crops near the discharge port is weakened, and wind damage can be suppressed.

[Brief explanation of the drawing]

1 to 9 relate to an embodiment in which the present invention is applied to an agricultural chemical spraying device used for large-scale pest control of rice fields, etc., and FIG. 1 is a longitudinal sectional view of the entire blowing section. ° Figure 2 is a schematic perspective view of the discharge side casing showing the cut surface of the discharge side casing that forms the discharge port, and Figure 3 is the
Figures 4 and 2 are views showing modified examples of the shape of the discharge side casing, Figure 4 is a vertical cross-sectional view of the entire blowing section with the reaching type nozzle device attached, and Figures 5 and 6 are agricultural chemical spraying. A side view of the entire device and a view from the rear; FIG. 7 is a detailed longitudinal cross-sectional view of the blower section with the distal end side of the discharge side casing omitted;
Figure 8 is a sectional view taken along the line ■-■ in Figure 7, Figure 9 is a hydraulic circuit diagram for driving the hydraulic motor, and Figures 10 to 20.
The figure relates to the prior art, and in Figure 10, the end on the discharge port side is the first
FIG. 11 is a schematic plan view of a blowing section having an example of the shape of
A view of the outlet of the ventilation section in Figure 0 viewed in the direction of the center line of the ventilation section,
FIG. 12 is a schematic plan view of a blowing section in which the end on the side of the discharge port has a second shape example, FIG. 13 is a view of the discharge port of the blowing section shown in FIG. FIG. 14 is a schematic plan view of a blowing section with a third shape example at the end on the side of the outlet; FIG. 15 is a diagram of the outlet of the blowing section shown in FIG. Figures 17 and 17 are diagrams showing examples of how to install a nozzle in the blower section of an agricultural chemical spraying device, Figure 18, and Figure 1.
FIG. 9 and FIG. 20 are graphs showing the relationship between the distance from the discharge port of the blower section of FIG. 10, FIG. 12, and FIG. 14, respectively, and the amount of chemical solution dropped. 44...Casing outer cylinder (cylindrical casing member), 4
8...Discharge side casing (i-shaped casing member), 5
0... Suction port, 58... Moving blade (blower), 70...
・Discharge port, 76... nozzle. Fig. 1 44...Casing outer surface (cylindrical casing member) 48
...Discharge side casing member (cylindrical casing member) 5
o...Suction port 58...Dynamic N (blower) 7o...Discharge port Aro...Nozzle Figure 2 Figure 4 Figure 6 Figure 7 Figure 8 Figure 9 Figure 5.6 Figure 10 Figure 11 1'1 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17

Claims (2)

[Claims] (1) A cylindrical casing member (44, 48) has an inlet (50) and an outlet (70) at both ends, and a blower (58) is disposed within the cylindrical casing member (44, 48). The cylindrical casing member (
44, 48) are tapered toward the discharge port (70), and the discharge port (70) is
The upper end protrudes from the lower end and has a cut surface oblique to the center line of the cylindrical casing member (44, 48), and the nozzle (76) prevents air from flowing from the discharge port (70). An agricultural chemical dispersing device characterized in that the agricultural chemicals are disposed at appropriate intervals along the periphery of the discharge port (70) on the outer periphery of the discharge port side end facing in the direction in which the discharge port (70) flows. (2) The discharge port (70) has a lower protrusion (80) projecting downward.
Agricultural chemical spraying device as described in Section 1.