JP2717998B2 - Spray spout - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying jet of a power sprayer such as a backpack power sprayer for spraying powdery and granular powders such as chemicals, fertilizers, and seeds, and more particularly to various powdery and granular powders. The present invention relates to a spraying jet that can perform uniform spraying.

[0002]

2. Description of the Related Art In a backpack power spreader, a spray tube has a plurality of injection holes formed in a line in a longitudinal direction, and a base end side thereof is connected to a backpack power spreader main body and conveyed by a carrier wind. Pour powdery and granular powders such as drugs, fertilizers and seeds,
The guide portion is caused to collide with the powdery and granular sprays, changes the direction of the powdery and granular sprays toward the nozzles, and ejects the powders from the respective nozzles. It is preferable that the spraying density of the powdery and granular spray from the spraying tip is uniform in the longitudinal direction of the spraying tip, but the dimensions and the inclination angle of the nozzle and the guide portion are set according to the powdery and granular spraying agent having a predetermined particle size. In this case, when powdery or granular powders having different particle diameters or the like are used, there is a problem that uneven distribution is generated.

In the spraying jet disclosed in Japanese Utility Model Laid-Open Publication No. 3-98952, a spraying jet is provided with a guide portion which collides with a powdery and granular spraying material which is conveyed by a conveying wind in the spraying jet and changes its direction toward the jet orifice. The amount of protrusion into the inside can be adjusted in a plurality of stages, and the amount of protrusion of the guide portion is changed in accordance with the particle size or the like, thereby preventing uneven spraying in the longitudinal direction of the spray nozzle.

[0004]

Problems to be Solved by the Invention 3-98952
In the spraying nozzle disclosed in Japanese Patent Application Laid-Open No. H11-157, the structure is complicated because the amount of protrusion of the powdery and granular spraying agent into the spraying nozzle can be adjusted in a plurality of stages.

[0005] An object of the present invention is to provide a spraying jet head capable of achieving uniform spraying for various powdery and granular spraying agents with a simple structure.

[0006]

The present invention will be described with reference to the drawings corresponding to the embodiments. In the spraying jet (36) of the present invention, the jet pipes (42, 44, 46) guide the powdery and granular spraying agent (24) conveyed by the conveying wind in the longitudinal direction,
A plurality of spraying part rows (48a-d) set in accordance with the type of the powdery and granular spraying agent (24) are provided in the circumferential direction. Each spraying part row (48a-d) is provided in correspondence with each of the plurality of nozzles (50) drilled in the nozzle pipes (42, 44, 46) in a line in the longitudinal direction, and each nozzle (50). And a guide portion (52) that can be switched to an inner protruding position and an outer protruding position protruding in and out of the injection tubes (42, 44, 46) by deformation. The inwardly projecting position is set such that the powdered and granular powder (24) is turned toward the nozzle (50) by collision with the guide portion (52).

[0007]

According to the present invention, the spraying part rows (48a-d) are selected according to the kind of the particle size of the powdery and granular spraying agent (24) sprayed from the spraying jet (36). In the selected spraying part row (48c), the guide part (52) is pushed into the injection pipes (42, 44, 46) and is switched to the inwardly projecting position by deformation. Unselected sprayer rows (48a, b,
In d), the guide part (52) is pulled out of the injection pipes (42, 44, 46) and is switched to the outside projecting position by deformation. The selected spraying part row (48c) is located substantially on the lower surface side of the injection pipes (42, 44, 46) such that the injection port (50) faces the object to be sprayed. The powdery and granular spray (24) is transported by the transport wind, introduced into the jet pipes (42, 44, 46), and guided to the guides (52) of the spraying row (48c) which is located at the inwardly projecting position. It collides and changes its direction toward the nozzle (50), and squirts toward the object to be sprayed through the nozzle (50). In the non-selected spraying part rows (48a, b, d), the guide part (52) is in the outwardly projecting position, and the powdery and granular spraying agent (2
4) does not collide with the guide part (52) of the spraying part row (48a, b, d),
The collision function of the guide portion (52) that is ejected from the ejection port (50) by being caused to collide with the powdery granule (24) is invalidated.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 8 is a vertical sectional view of the backpack power spreader 10. The backpack power spreader 10 includes an impeller 12 driven by an engine to generate pressurized air. Fan case 14,
A pressurized air passage 16 that accommodates the impeller 12 therein and extends in a spiral shape around the impeller 12 and gradually increases in diameter is formed, and the pressurized air passage 16 is a pressurized air outlet 18 of a fan case 14.
Has been reached. The curved pipe 20 is rotatably connected to the pressurized air outlet 18 at the upper end, and the direction of the downstream side can be freely changed in a substantially horizontal angle range.

The spray tank 22 is disposed above the fan case 14 and stores therein a powdery and granular spray 24 such as a medicine, a fertilizer, or a seed. The shutter case 26 is interposed between the fan case 14 and the sprinkle object tank 22 in the vertical direction, and the shutter 28 is disposed in the shutter case 26,
The spreader tank is rotatably supported by a shutter case 26 and the opening is adjusted by a shutter lever (not shown).
The discharge flow rate of the powdery granular material 24 from the powder 22 is adjusted. The shutter cover 30 is disposed in the spreadable article tank 22 so as to separate from the shutter 28 and cover the upper part of the shutter 28. The discharge pipe 32 extends to a downstream area in the pressurized air passage 16 and opens below the shutter 28 and near the pressurized air outlet 18 at upstream and downstream ends, respectively. The bellows tube 34 has flexibility and is fitted to the outer peripheral sides of the bent tube 20 and the spraying jet head 36 at both ends, and is fastened and fixed thereto by hose bands 38 and 40.

FIG. 1 is a longitudinal sectional view of the spraying jet head 36, and FIG. 2 is a view of the spraying jet head 36 viewed from the tip side. The spraying jet head 36 includes three jet tubes 42, 44, 46 that are adjacently connected to each other detachably at their ends and extend substantially linearly as a whole, and that the bellows tube 34
Provided from the side, the injection tubes 42, 44, 46 are made of a soft material such as resin. The spraying part rows 48a-d are located at 90 ° intervals in the circumferential direction of the injection pipes 42, 44, 46, and are arranged in a row at appropriate intervals in the longitudinal direction of the injection pipes 42, 44, 46. Perforated spout
50 and a gutter-like guide portion 52 provided at each injection port 50.

FIG. 5 is a perspective view of the injection tube 42, and FIGS. 6 and 7 are vertical cross-sectional views of the gutter-like guide portion 52 of the injection tube 42 at the outside projecting position and the inside projecting position, respectively. 5 to 7 show the injection port 50 and the gutter-like guide portion 52 of the injection pipe 42,
The configurations of the injection ports 50 and the gutter-shaped guide portions 52 of the 4 and 46 are also the same.
The gutter-shaped guide portion 52 can be switched between an inner protruding position and an outer protruding position that pass through the injection port 50 and protrude in and out of the injection tube 42 by a snap action-like deformation. The gutter-shaped guide portion 52 has a
Opening toward the upstream end of the injection tube 42, having an arcuate cross section, and gradually decreasing the cross-sectional area toward the downstream end of the injection tube 42, It is inclined toward.

FIG. 3 is an enlarged vertical sectional view of the base end side of the injection tube 42,
FIG. 4 is an enlarged view of the injection tube 42 as viewed from the base end. Spout 44
Although the enlarged cross-sectional view and the view from the base end of 46 are omitted, the configuration and operation except for dimensions and the like are almost the same as those of the injection tube 42. The gutter-shaped guide 52 of the spraying part row 48c is pushed into the injection pipe 42,
The position is switched to the inner protruding position, and the gutter-like guide portions 52 of the other spraying unit rows 48a, b, d are drawn out of the injection pipe 42 and are switched to the outer protruding position. The powdered and granular powder 24 flows in the jet pipe 42 in the longitudinal direction from the base end to the tip end, collides with the gutter-shaped guide portion 52 at the inwardly protruding position, changes direction, and is discharged from the jet port 50 to the jet pipe.
It is gushing out of 42. Spraying unit rows 48a-d are powdered and granular
The spraying parts are provided so as to correspond to the four types, and when spraying the powdery and granular spraying agent 24 of the corresponding type, the respective spraying parts are so arranged that the spraying density becomes uniform in the longitudinal direction of the spraying jet head 36. Column
At 48a-d, the shape, size, and interval of the injection port 50 (the interval is equal regardless of the spraying unit rows 48a-d in the embodiment), and the protrusion amount and inclination of the gutter-like guide portion 52 at the inside projecting position Angles, heights, width dimensions, and the like are set.
The application section rows 48a-d correspond to, for example, fertilizers having a large particle size, a medium particle size, a small particle size, and a fine particle size, respectively.

The operation of the embodiment will be described. Spray spout
The spraying unit rows 48a-d are selected according to the type of the powdery and granular spraying agent 24 to be sprayed from 36, such as the particle size. For example, when the powdery and granular dusting agent 24 is a fertilizer having a small particle size, the spraying part row 48c is selected, and in the spraying part row 48c, the gutter-like guide 52 is provided with the jet pipes 42, 44, 4
It is pushed into 6 and is switched to the inside protruding position by deformation. In the non-selected spraying part rows 48a, b, d, the gutter-like guide part 52 is drawn out of the injection pipes 42, 44, 46, and is switched to the outer protruding position by deformation. In addition, the application line
The injection tube 4 is positioned so that 48c is almost on the lower surface side of the injection tubes 42, 44, 46.
The rotational positions of 2, 44 and 46 are changed and fitted and fixed to the downstream end of the bellows tube 34.

The pressurized air is generated in the pressurized air passage 16 by the rotation of the impeller 12, and is turned into a wind to convey the powdery and granular spraying agent 24 in the sprayed article tank 22 to the spraying jet head 36. Granular powder 24
Flows from the proximal end to the distal end in the injection tubes 42, 44, 46, and the injection tube 4
The powdery and granular spray 24 flowing along the wall surfaces of the injection pipes 42, 44, 46 in the lower portion of the spray pipes 42, 44, 46 collides with the gutter-like guides 52 of the spraying row 48c on the way, and the nozzle 50 Change direction to the spout 50
From the jet pipes 42, 44, 46. Spraying unit rows 48a, b,
In d, the gutter-like guide portion 52 is at the outwardly protruding position, and the powdery and granular spraying agent 24 flowing through the jet pipes 42, 44, 46 is sprayed by the spraying portion rows 48a,
No collision occurs with the gutter-shaped guides 52 of b and d, and the function of the gutter-shaped guide 52 is invalidated. The size of the nozzle 50 of the spraying part row 48c and the angle of the gutter-shaped guide part 52, etc., when the powdery and granular spraying agent 24 of small particle size is ejected from each nozzle 50 of the spraying part row 48c, the spraying tip 3
6 is set so as to be evenly spread in the longitudinal direction, so that the powdered and granular spray agent 24 is actually evenly spread in the longitudinal direction of the spraying jet head 36.

In the preferred embodiment, the spray tip 36 has three jet tubes 42,
44 and 46 are provided, but four or more injection tubes may be provided. Although the embodiment is about the backpack power sprayer 10, the spraying jet of the present invention is a power sprayer mounted on a bogie or the like.
It is applicable to other power spreaders.

[0016]

According to the present invention, the spray nozzle comprises a plurality of rows of spraying parts set in accordance with the type of the powdery granular material, and the spraying part row is selected in accordance with the type of the powdery granular material. Then, the guide portion of the selected spraying part row is switched to the inner protruding position, and the powdery and granular spraying agent is ejected from each of the nozzles of the selected spraying part row. Therefore, the structure is simplified, and the powdery and granular spraying agent is evenly distributed in the longitudinal direction of the spraying nozzle regardless of the type, compared to the structure in which the protrusion of the guide portion into the jet tube is adjusted to suppress uneven spraying. Can be sprayed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a spray jet.

FIG. 2 is a view of a spraying jet head as viewed from a tip end side.

FIG. 3 is an enlarged longitudinal sectional view of a base end portion side of a jet tube.

FIG. 4 is an enlarged view of the injection tube viewed from a base end portion.

FIG. 5 is a perspective view of a jet tube.

FIG. 6 is a vertical cross-sectional view of a gutter-like guide portion of the injection tube at an outer protruding position.

FIG. 7 is a vertical cross-sectional view of a gutter-like guide portion of an injection tube at an inwardly projecting position.

FIG. 8 is a vertical sectional view of the backpack power spreader.

[Explanation of symbols]

 Reference Signs List 24 powder-granular dispersing agent 36 dispersing spray head 42,44,46 spray tube 48a-d spraying part row 50 spout 52 gutter-shaped guide part (guide part)

Claims (1)

(57) [Claims] An injection pipe (42, 44, 46) guides a powdery and granular spray (24) conveyed by a conveying wind in a longitudinal direction,
A plurality of spraying unit rows (48a-d) set in accordance with the type of the powdery and granular spraying agent (24) are provided in the circumferential direction, and each of the spraying unit rows is provided.
(48a-d) are provided in correspondence with the plurality of nozzles (50) drilled in the injection pipes (42, 44, 46) in a line in the longitudinal direction, and the nozzles (50). A guide portion (52) that can be switched by deformation to an inner protruding position and an outer protruding position protruding in and out of the jet pipe (42, 44, 46), and the inner protruding position is
A spraying spray head, which is set so that the powdery and granular spraying agent (24) is turned toward the spray port (50) by collision with the guide portion (52).