JPH09289813A - Feeding device for powdery and granular agent applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeding device for a powdery and granular agent applicator, capable of eliminating difficulty in feeding of the agnet caused by a space part at an outlet part formed by a bridge phenomenon resulting from a backflow to a housing tank of pressure wind for sending the gent to a spraying column and pressing back of the agent delivered from the housing tank in spraying the agent from an opening at the bottom of the spraying column on the ground side by sending the powdery and granular agent from the housing tank to the spraying column by the pressure wind under pressure. SOLUTION: A powdery and granular agent is dropped from a housing tank 1 through a feeding tool 2 to a lower chamber 3. In order to transport the agent to a central guide column 4, wind produced by a blower 5 is partially sent through a front wind route pipe 6 to the lower chamber 3. In a wind pressure applicator for connecting the lower chamber 3 to the central guide column 4 by a transporting wind route pipe 7, the lower end part of an air route pipe 8 is extended to the vicinity of the upper part of the feeding tool 2 to give the objective feeding device for a powdery and granular agent applicator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feeding device for a powder / granule spraying machine. This invention, when spraying the powder and granules on the surface of the field with a spraying tube of a certain width, attempts to pressure-feed the powder and granules by utilizing wind pressure, and this wind pressure is efficiently transferred to the downstream side of the powder and granules. It is something that is often used.

[0002]

2. Description of the Related Art A conventional dusting agent spraying apparatus utilizing wind pressure is disclosed in Japanese Utility Model Laid-Open No. 5-7087.
As shown in Japanese Patent Publication, the medicine stored in the medicine tank is
The fertilizer hose on the downstream side is sprayed on the field surface by the pressured air of the blower, and when the pressured air for drug blowing flows back into the drug tank, a hollow part may occur at the lower part of the drug tank, causing uneven spraying, It was necessary to improve the sealing performance around the medicine feeding section under the medicine tank.

[0003]

SUMMARY OF THE INVENTION The present invention is to solve such a problem of the conventional device, and has taken the following technical means. That is, the powder and granules are dropped from the tank 1 for storing the powder and granules into the lower chamber 3 through the feeding device 2. In order to blow the powder and granules to the central guide cylinder 4, a blower 5 is blown. A part of the air is blown to the lower chamber 3 via the front air passage pipe 6 and the lower air chamber 3 and the central guide tube 4 are connected by the conveying air passage pipe 7 to the upper vicinity of the feeding tool 2. The lower end of the air passage pipe 8 is faced to the feeding device of the powder / granule sprayer.

[0004]

[Example] The illustrated example is a powder / granule spraying machine 10 for spraying a powdery / granular powder which is detachably attached to the rear part of a mobile agricultural machine 9, and the powder / granular powder is formed from powder such as fertilizer or disinfectant. Made of solid material, the powdered fertilizer and drug particles in the powdered powder sprayer 10 are
It is intended to be sprayed at a constant density on the field surface.

Embodiments of the present invention will be described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to them unless otherwise specified. , Are merely illustrative examples. Front and rear wheels 11 in front of and behind the mobile agricultural machine 9,
12 is attached to the seat 1, which is moved forward or backward through a gear shift lever and an accelerator device (not shown) by an operation of a driver sitting on a seat 13 provided above and in front of the rear wheel 12.
3 By steering the steering wheel 14 provided in front of the mobile agricultural machine 1
9 changes direction to right and left and advances.

The front and rear wheels 11 and 12 are connected by a main frame 15, and the powder / granule sprayer 10 is mounted on the rear portion of the main frame 15. The powder and granule spreader 10 includes a tank 1 in the upper center in the left-right direction and left and right stand frames 16 and 1 for supporting the tank 1.
6, a case 17 in which a blower 5 provided in the rear portion of the tank 1 is internally provided, and a spray tube 18 whose width is freely changeable in the lateral direction at the rear end. The stand frames 16 and 16 are provided on the main frame 15 above the rear wheel 12. It is placed and fixed on the section.

As shown in the figure, the tank 1 is a storage box whose lower part is squeezed into a taper shape, and an opening / closing lid 19 for putting a powder or granular material is provided on the upper part, and an electric motor 2 is provided on the lower part of the taper shape.
A shaft mounting case 25 containing two left and right feeding tools 2 and 2 mounted on a drive shaft 21 which is driven and rotated at 0 is attached, and the lower portion thereof is covered with a lower cap 26 having left and right lower chambers 3 and 3. There is.

Front and rear openings 22, 22.23, 23 for inflow and outflow of wind are provided in front and rear of the lower cap 26, and the front air passage pipe 6 having a round cross section is provided at each opening.
And the end of the elastic material pipe, which is the transport air duct pipe 7, is fixed. Hereinafter, in the case where the configuration is not limited, the cross section of the air passage or the passage of the granular material is round in order to reduce the resistance. Front opening 22
The cross section of is narrowed by a squeezing tool 24, and the rear ends of the front air passage pipes 6 and 6 whose front ends are connected to the intakes 27, 27 provided in the case 17 of the blower 5 are attached to the front opening 22,
A part of the wind generated by the blower 5 is supplied to the lower chambers 3, 3. At the intake 27, the measured wind speed is 45 to 50 m /
A pressure blast of about a second is supplied.

Left and right opening / closing shutters 28 and 29 are separately provided above the left and right feeding tools 2 in the shaft mounting case 25, and the operating shaft 30 is operated to perform the opening / closing operation on the upper portion of the feeding tool 2. , It is decided to supply or stop the powder and granules stored in the tank 1. The tank 1 contains about 180 kg of powder and granules.
Since it acts on 9, the feeding device 2 before storing the powder and granules
The left and right shutters 28 and 29 that open and close the upper part of
Adjusting to “open” or “closed” and deciding whether to apply full width or one side will facilitate the subsequent spraying work. The left and right feeding tools 2 and 2 are arranged side by side in the left-right direction. Both of them can be driven simultaneously or one of them can be rotated by a cutting operation, and in the case of one-sided drive, only one side (either left or right half) corresponding to the entire spraying width of the spraying cylinder 3 is sprayed.

Above the abutting portions of the left and right feeding tools 2 and 2, the operation shafts 30 and 3 of the left and right shutters 28 and 29 are opened.
The air passage pipe 8 which is an air bleeding pipe is provided above 0.
The lower end portion of the air passage pipe 8 communicates with the left and right lower chambers 3 and 3 regardless of whether the opening / closing shutters 28 and 29 are operated.

The feeding tool 2 has holding grooves 32, 32. . . A rotating roll provided with a large number of
Protrusions 33, 33. . . The portion is made of an elastic material, and a small gap is provided between the portion and the inner wall surface of the shaft mounting case 25 so as to be rotatable. The powdery granules located in the holding groove 32 of the feeding tool 2 in the lower part of the tank 1 are sent to the lower chamber 3 by the rotation of the feeding tool 2, and a part of the pressure wind generated by the rotation of the blower 5 is part of the front air passage pipe. 6 through the front opening 22 to the lower chamber 3. This pressure wind is squeezed by the squeezing tool 24 at the front opening 22 of the lower cap 26, and then the lower cap 2
6 from the rear opening 23 to the central guide tube 4 through the conveying air passage pipe 7. At this time, the powdery granules in the lower chamber 3 are simultaneously conveyed to the central guide cylinder 4 through the conveying air passage pipe 7.

During transportation of the powder and granules, if the powder and granules become clogged in the conveying air passage pipe 7 due to insufficient wind force, residue from the previous work, large amount of moistening, etc., pressure blast will be generated. Act on 3. When the internal pressure of the lower chamber 3 rises, the pressure blast enters from the lower end opening of the air passage pipe 8 and is discharged from the upper opening of the air passage pipe 8, so that the upper opening of the air passage pipe 8 is powdered as shown in the figure. When the opening is formed in the vicinity of the upper part of the granules, the compressed air acting on the lower chamber 3 at the lower tapered portion of the tank 1 does not lift up the powder granules in the tank 1 and prevents a bridge state. Further, when the powder and granules in the tank 1 are very heavy, a large amount of compressed air acts on the conveying air passage pipe 7 to clog the powder and granules, resulting in a problem that it takes time for maintenance.

Next, a detailed description will be given of the blower 5 section for generating a pressure blast. The blower 5 is driven by a PTO shaft, which is an external power take-out device of the mobile agricultural machine 9, on the drive shaft 34 in a clockwise direction indicated by an arrow "d" in the rear view. Then, due to the rotational centrifugal force of the blower 5, the outside air is sucked through the intake port 35 opened in the central portion of the back surface, passes through the main air passage 31 and the central guide cylinder 4
In addition, most of the pressure wind can be supplied, and a part of the pressure wind can be supplied to the lower portion through the front air passage pipe 6 from the intake port 27 that is opened in the direction orthogonal to the front wall surface of the case 17 as described above. Supplying to chamber 3. A disc-shaped throttle valve 36 is provided at the inlet portion of the main air passage 31 so that the amount of pressure blast supplied from the main air passage 31 to the central guide tube 4 can be adjusted. 3
Reference numeral 7 denotes an adjusting lever, which engages and adjusts the lever shaft with the uneven portion of the positioning plate 38 to change the swing angle of the shaft 39 and adjust the position of the throttle valve 36. The main air duct 31 is supplied with pressure wind with a measured wind speed of about 25 to 30 m / sec.

The inner diameter of the main air passage 31 is about the same as the inner diameter of the central guide tube 4, and the inner diameters of the front air passage pipe 6 and the conveying air passage pipe are about 1/3. Next, the central guide tube 4
The powder-granular agent-dispersing structure around will be described. As described above, the powder / granule sprayer 10 has the stand frames 16 and 16 provided on the left and right sides of the tank 1 mounted and fixed on the main frame 15 above the rear wheel 12. A central guide tube 4 attached to a support frame 40 that integrally projects rearward
On the left and right sides of the left and right side spraying cylinders 41, 41, respectively, in a spraying work state in which the lateral spraying cylinders 41, 41 are aligned in the horizontal direction, or the side spraying cylinders 41, 41 are moved upward from the end of the central guide cylinder 4. It is possible to change to a storage state in which it is folded forward, and the central guide cylinder 4 and the left and right side spray cylinders 41, 41 are used for the spray cylinder 1.
Make up eight.

As described above, the spraying cylinder 18 is composed of the central guide cylinder 4 close to the width of the mobile agricultural machine 9 and the left and right side spraying cylinders 41, 41 which fold upward or forward and are extended straight at the rear of the machine. At the time of spraying work, the spray cylinder 18 has about 6
Even though the width is about 7m, the spraying width of powder is 10
Spread over about m, and the left and right side spreading cylinders 41, 41
The vehicle is allowed to travel on the road with a narrow width of about 1.2 m when traveling and traveling on the road when not in operation, which is folded by the rotating portion.

A fixed distance is provided between the left and right edges of the central guide tube 4 and the inner ends of the left and right side spray tubes 41, 41, and this interval is integrally connected and engaged by bellows tubes 42, 42 made of an elastic material. End fittings 44, 44 of the support fitting 43 also serving as a tightening ring
The part fixes the engagement. A support metal fitting 43 having a joint 45 is provided on the outer periphery of the bellows pipe 42 between the inner ends of the left and right lateral distribution cylinders 41 with respect to the central guide cylinder 4, and one end is attached to the support frame 40 side and the other end is attached to the side. The electric expansion / contraction tool 46 such as a rotary screw attached to the side spraying cylinder 41 side is extended / contracted to change the posture of the side spraying cylinder 41 between the stored state and the spraying work state. The part is called a rotating part.

The central guide tube 4 is a resin agent molded product, and the left and right end edge surfaces have a round shape, and the middle portion has a mounting plane of a constant width on the rear wall side in the traveling direction. The portion has a chevron-shaped guide protrusion 47 that gently projects forward. A main airflow passage opening is opened on the front wall surface side of the guide protrusion 47, and a rounded end edge surface portion of the main airflow passage 31 is abutted to this opening to integrally engage the two with a rubber ring, and a tightening ring (not shown). The engagement is fixed by.

Further, the main air passage 31 is the main air passage receiving portion, and the air passage is divided into left and right by a partition plate 48. The partition plate 48 bends the tip end thereof to the side with a large air volume due to the internal shape of the cylinder in order to divide the compressed air flowing in the direction of the arrow "a" of the main air passage 31 into two, and divides the left and right air volume into approximately two halves. It is attached to the inner wall surface above or below the central guide tube 4 via fasteners in a detachable and replaceable manner.

On the downstream side of the main air passage 31 which is divided into left and right by a partition plate 48, resistance plates 49, 4 having a V-shaped tip and having a constant width are provided.
9 are attached to the above-mentioned mounting plane of the central guide tube 4 via fasteners such as bolts and nuts, and the respective conveying air duct pipes 7 are provided on the front wall surface inside the central guide tube 4 located within this fixed width. , 7 are opened, and the conveying air passage pipe 7 and the conveying air passage are engaged with a small-diameter rubber ring, and the engagement is fixed with a tightening ring (not shown). Further, the inner diameter of the central guide tube 4 is set so that the operator's hands and fingers can be inserted therein, so that the work of attaching the partition plate 48 and the resistance plate 49 can be facilitated.

Since the left and right side spreading cylinders 41, 41 are symmetrical, the structure of the right side spreading cylinder 41 will be described below. It is composed of a cylinder 41a and an outer cylinder 41b, which are engaged with each other and clamped and held by a tightening ring 50. The inner cylinder 41a has an inner diameter smaller than that of the edge of the central guide cylinder 4, and the main conveying wind "a" of the granular material is narrowed to be stronger.
A first injection port 51 is provided on the lower wall side of a. Reference numeral 52 denotes a discharge amount control device, which can change and adjust the discharge amount of the granular material by adjusting the opening degree of the injection port 51. However, if there is no significant change in the diameter or the specific gravity of the granular material, the adjustment is not necessary. is there.

A guide pipe 53 is integrally provided so as to project downward from the injection port 51. The tip of the guide pipe 53 is connected to the joint 4 of the support fitting 43 that covers the outside of the bellows pipe 42.
5 It extends to the vicinity of the lower part, and when the bellows pipe 42 is straightened in the spraying work state posture, a certain angle is applied so that the granular material is sprayed from the tip of the guide pipe 53 toward the lower side of the central guide cylinder 4. θ is provided. In addition, guide pipe 5
3 Since the tip portion is located in the vicinity of the joint 45 of the support fitting 43, when the side spraying cylinder 41 is in the stored state by the rotating portion, this tip portion is prevented from largely protruding rearward, Improves safety and damage when driving.

In the outer cylinder 41b of the side spray cylinder 41, about 4 to 5 spray holes 54, 5 are formed on the lower wall surface with appropriate intervals.
4. . . . A plurality of openings are opened, and the discharge amount restricting tool 52 is adjustably attached to the spray hole 54. The outer cylinder 41b is a straight pipe, and a scattering regulation cover 55 is attached to the outer opening to regulate the scattering of the powdery granules laterally to about 2 m from the side end. During the spraying work, the spray holes 54, 54. . . From
The powder and granules are dropped and sprayed on the surface of the field while the powder and granules are being sent to the left and right tip sides by the wind speed of the wind moving in the direction of the arrow "C".

Each of the spray holes 54, 54. . . Emission control tools 52, 52. . The distribution density of the powder and granules on the field surface is adjusted by adjusting each of the above. FIG.
Is a partial explanatory view of the electric circuit. When the rotation of the blower 5 in the case 17 is detected by the rotation sensor 56 and the rotation of the blower 5 becomes, for example, 3,000 rotations or less, CP
By turning off the electric motor 20 that drives and rotates the drive shaft 21 that drives the feeding tool 2 via a controller such as U57, when the manual switch 58 is turned on, the blower 5 flows in the direction of the arrow "b". It is prevented that the powdery or granular material is clogged in the transport air duct pipe 7 that transports the powdery or granular material from the lower chamber 3 of the feeding device 2 to the transport wind receiving port of the central guide tube 4. At this time, although not shown, activating an alarming tool such as a blinking lamp for alarm or a buzzer has a further effect on forgetting spraying. 59 is a battery.

With respect to the powder and granules in the tank 1, a part of the rotating wind of the blower 5 reaches the lower chambers 3 and 3 of the feeding tools 2 and 2 from the front air passage pipes 6 and 6, and the rotation of the blower 5 is constant. For example, when the manual switch 58 is turned “on” in the case of 3,000 revolutions or more, the electric motor 20 rotates and the drive shaft 21
To rotate the powder and granules into the lower chamber 3. The powdery granules are blown to the carrying wind receiving port of the central guide cylinder 4 through the carrying wind pipes 7, 7.

On the other hand, most of the rotating airflow of the blower 5 reaches the main air passage inlet through the main air passage 31 when the throttle valve 36 is fully opened, as shown by the arrow "a", and is divided by the partition plate 48 to the left and right. It is divided into two on the side spreading cylinders 41, 41 side. The main wind divided into the left and right flows to the lateral spraying cylinders 41, 41 side while being further divided into upper and lower sides by the resistance plate 49. At this time, the above-mentioned carrier wind receiving port is provided at a constant width interval portion of the resistance plate 49. Therefore, the powdery or granular material is easily ejected to the negative pressure portion of the resistance plate 49 at a constant width interval portion with a small resistance and is delivered to the downstream side.

The bellows pipe 42 is pressure-fed by the divided main wind.
The powdered granules that have passed through reach the first injection port 51 provided on the lower wall side of the inner cylinder 41a, and the discharge amount is restricted by the discharge amount restricting tool 52, and the guide pipe 53 is guided from the first injection port 51 portion. After that, it is obliquely sprayed from the lower part of the central guide tube 4 to the field surface below the rotating part. The remaining powdery granules are sprayed downwards onto the field surface through the spray holes 54, 54 opened at appropriate intervals on the lower wall surface of the outer cylinder 41b on the downstream side, and the powdery granules remaining at the end are regulated to be scattered. The cover 55 scatters laterally downward. At this time, if the specific gravity or size of the powder or granules changes, the direction or amount of the powder or granules to be sprayed or scattered will easily change, so that the throttle valve 36
The amount of compressed air supplied to the main air passage 31 is adjusted by adjusting the opening / closing amount of the air conditioner to stabilize the spraying and scattering.

[0027]

As described above, according to the present invention, the powdery granules are dropped from the tank 1 for storing the powdery granules into the lower chamber 3 via the feeding device 2, and the powdery granules are fed into the central guide tube. 4, a part of the wind generated by the blower 5 is blown to the lower chamber 3 via the front air passage pipe 6, and the lower chamber 3 and the central guide tube 4 are connected by the conveying air passage pipe 7. In the wind pressure spreader, since the lower end portion of the air passage pipe 8 is made to face the upper vicinity of the feeding tool 2, the bridge prevention device of the powder / granule sprayer is configured, so that the powder / granule is transported. The powder granules become clogged in the conveying air passage pipe 7 due to insufficient wind power, residue from the previous work, large amount of moistening, etc., and pressure blast acts on the lower chamber 3 to cause internal pressure of the lower chamber 3. Even if the air passage rises, pressure wind flows from the lower end opening of the air passage pipe 8 and the upper opening of the air passage pipe 8 Since the compressed air that acts on the lower chamber 3 does not lift the powder and granules in the tank 1 at the lower tapered portion of the tank 1 because it is discharged from the tank 1, the supply of the powder and granules is not interrupted, so It is possible to reduce the discontinuity of the spraying, and to reduce the possibility that it takes time to perform maintenance by clogging the transport air duct pipe 7 with the powder or granules.

[Brief description of drawings]

FIG. 1 is an overall side view of an essential part, with a partial cross section.

FIG. 2 is an enlarged side sectional view of an essential part of FIG.

FIG. 3 is a rear cross-sectional view of FIG.

FIG. 4 is an overall side view with a partial cross section.

FIG. 5 is an overall rear view.

FIG. 6 is a rear perspective view of the entire main part.

FIG. 7 is a rear view of FIG.

FIG. 8 is an enlarged rear cross-sectional view of the main part of FIG.

9 is a view on arrow A in FIG.

FIG. 10 is an enlarged rear cross-sectional view of the main part of FIG.

11 is an enlarged plan sectional view of a main part of FIG.

FIG. 12 is a partial explanatory diagram of an electric circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank 2 Feeding tool 3 Lower chamber 4 Central guide tube 5 Blower 6 Front air passage pipe 7 Transport air passage pipe 8 Air passage pipe

Claims (1)

[Claims] 1. A feeding device 2 from a tank 1 for storing a powdery or granular material.
The powder and granules are dropped into the lower chamber 3 through the air passage, and in order to blow the powder and granules to the central guide cylinder 4, a part of the blast of the blower 5 is passed through the front air passage pipe 6 to the lower chamber. In the wind pressure spreader in which the lower chamber 3 and the central guide tube 4 are connected to each other by the transfer air passage pipe 7, the lower end portion of the air passage pipe 8 faces the upper vicinity of the feeding tool 2. The feeding device of the powder and granules spreader.