JPH0837951A - Sprinkling head of liquid applicator - Google Patents

Abstract

PURPOSE:To provide a sprinkling head for a liquid applicator appropriately modified in perforation pattern so as to enable water to be nearly uniformly sprinkled over the whole sprinkling area of any shape and size with reduced amount of water to be used and also capable of reducing the number of sprinklers to be set up compared to the case with conventional sprinkles. CONSTITUTION:A sprinkling head 1 is so designed that a hemispherical part 1a is formed nearly hemispherically in an upward convex fashion and there are plural perforations 2.... These perforations 2... are situated, in a plan view viewed from the top 3 of the surface of the hemispherical part 1a, within band- like areas 5.5 nearly parallel with the imaginary straight line 8p passing through the top 3. The band-like areas 5.5 stand within an elevation of 0-85 deg.C to the center on the sprinkling head cross-sectional view rectangular to the imaginary straight line 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid spraying head of a liquid spraying device for spraying a liquid.

[0002]

2. Description of the Related Art Conventionally, for example, irrigation of fields, vegetable gardens, vinyl greenhouses, orchards, parks and gardens where lawns and flowers have been planted, or watering roads, etc. A sprinkler is known as a water sprinkler used in the.

Generally, a sprinkler sprays water from a nozzle (hole) formed in a sprinkler head (hereinafter referred to as a head) rotatably provided at the center of a sprinkler region where water is desired to be sprinkled. In addition, the water sprayed from the nozzles is applied to the blades attached to the head, and the impact force causes the head to rotate in a certain direction to spray water concentrically over a wide range.

[0004]

However, in the sprinkler head which is the above-mentioned conventional sprinkler, the sprinkler region has a concentric circle shape (donut type) centering on the sprinkler. Therefore, for example, in the case where the sprinkling area for which sprinkling is desired is a rectangle such as a rectangle or a square, water cannot be sprinkled at the corners of these areas. In addition, for example, when watering various vegetables and flowers planted in ridges, or trees that are linearly planted, irrigate areas such as ridges, between trees and trees that do not require watering. As a result, the amount of water used increases. That is, the amount of wasted water increases. Further, the sprinkler has a problem that it cannot spray water in the vicinity of the sprinkler, although it can spray water over a wide range.

In order to prevent the non-sprinkling area from occurring, a plurality of sprinklers must be installed so that the sprinkling areas partially overlap each other.
Another problem is that the sprinkler cannot be installed efficiently.

Therefore, there is a need for a head capable of spraying liquid almost uniformly over the entire surface of a spraying area of any shape and size, that is, a spraying head of a liquid spraying device.

[0007]

According to a first aspect of the present invention, there is provided a liquid sprinkling head of a liquid sprinkling device, which is provided on a rising pipe of the liquid sprinkling device in order to solve the above problems. Then, the sprinkling head is formed in a substantially hemispherical shape that is convex upward, and has a plurality of holes that can disperse the liquid in the dispersal region, and the hole has a substantially hemispherical surface on the top thereof. In a plan view seen from the side, it is characterized in that it is formed in a band-shaped region formed substantially parallel to an imaginary straight line passing through the apex.

In order to solve the above-mentioned problems, the liquid sprinkling head of the liquid sprinkling device according to a second aspect of the present invention is the liquid sprinkling head of the liquid sprinkling device according to the first aspect, wherein the band-shaped region is At least one is formed on each side of the virtual straight line.

In order to solve the above-mentioned problems, the liquid sprinkling head of the liquid sprinkling device according to a third aspect of the present invention is the liquid sprinkling head of the liquid sprinkling device according to the first or second aspect, wherein the strip-shaped region is In the sectional view of the sprinkling head that passes through the top and is perpendicular to the virtual straight line, the elevation angle with respect to the center of the hemisphere is formed within the range of 0 ° to 85 °.

[0010]

According to the structure of claim 1, the plurality of holes of the sprinkling head are substantially parallel to an imaginary straight line passing through the apex in a plan view of the approximately hemispherical surface seen from the apex side. It is provided in the band-shaped region to be formed. Therefore, the flight distance of the liquid can be freely set by the hole drilling position on the hemispherical surface, and for example, by appropriately changing the formation pattern of the band-shaped region, the shape and size of the spray region can be changed. It is possible to spray the liquid accordingly.

As a result, it becomes possible to spray the liquid almost uniformly over the entire surface of the spraying area having an arbitrary shape and size. Further, since the holes are formed in the band-shaped area, the liquid is not sprayed to the area that does not require spraying. Therefore, the amount of liquid used can be reduced. That is, the amount of wasted liquid can be reduced. Furthermore, since it can be installed efficiently, the number of liquid spraying devices arranged in the entire spraying region can be reduced as compared with the sprinkler.

According to the structure of claim 2, at least one strip-shaped region is formed on each side of the virtual straight line. Therefore, for example, in the case where the spraying area is divided into two locations, by installing a liquid spraying device between both spraying areas, the liquid can be sprayed simultaneously to both spraying areas with one spray head. It becomes possible to do.

According to the third aspect of the present invention, the strip-shaped region is formed within an elevation angle range of 0 ° to 85 ° with respect to the center of the hemisphere in a cross sectional view of the sprinkling head that passes through the apex and is perpendicular to the virtual straight line. Has been done. The larger the elevation angle, the smaller the impact on the surface of the spraying area due to the sprayed droplets. Therefore, the liquid can be gently sprayed on the spraying area without causing the liquid droplets to bounce off. On the other hand, when the liquid spraying device is used for under-tree irrigation in the cultivation of fruit trees such as grapes, it is suitable that the belt-shaped region has a small elevation angle and is formed within a range of 0 ° to 60 °. Is preferred. In this case, by appropriately changing the diameter of the hole to make it smaller, it is possible to reduce the impact on the surface of the spray area caused by the sprayed droplets.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to FIGS. In the following description, the case where the liquid sprayed by the liquid spraying device is water, that is, the case where the liquid spraying device is used as a water spraying device will be taken as an example. Further, in the following description, as will be described in detail later, the case where the strip-shaped regions are formed one on each side of the virtual straight line will be described as an example.

As shown in FIG. 4, a water sprinkler as a liquid sprinkler according to this embodiment includes a rising pipe 11 for introducing water from a water pipe 10. The rising pipe 11 is erected at an arbitrary position on the soil or the like (spraying area) where watering is desired. At the upper end of the rising pipe 11,
A sprinkling head (sprinkling head) 1 is detachably attached via an attachment jig 12. The mounting jig 12
Has a threaded portion (female screw) (not shown) corresponding to a threaded portion 1b (described later) of the sprinkling head 1.

As shown in FIGS. 1 and 2, the sprinkling head 1
Is a hemispherical portion 1a formed in a substantially hemispherical shape that is convex upward, and a screw portion (male screw) 1b for attaching to the attachment jig 12.
And a connecting portion 1c connecting the hemispherical portion 1a and the screw portion 1b. In the present invention, the term “generally hemispherical” means that the shape of the longitudinal cross section of the hemispherical portion 1a (the cut surface in the direction perpendicular to the paper surface in FIG. 1) is a substantially semicircular arc shape or a substantially semielliptical arc shape. And

The connecting portion 1c is formed so that the shape of the sprinkling head 1 when viewed from above (FIG. 1) is, for example, a regular octagon so that the sprinkling head 1 main body can be easily attached to and detached from the mounting jig 12. Has been formed. A plurality of holes 2 ... Can be sprinkled on the soil or the like in the hemispherical portion 1a. The number of the holes 2 ... Is not particularly limited. Further, the size of the watering head 1 is not particularly limited.

The holes 2, ... Are plan views of the surface (generally hemispherical surface) of the hemispherical portion 1a viewed from the top portion 3 side (that is, FIG. 1).
, A virtual straight line 8 passing through the top portion 3 (in the figure, for convenience,
This imaginary straight line is indicated by a chain double-dashed line) and is formed in the band-shaped regions 5 formed substantially parallel to the phantom line. That is, the holes 2 ... Are bored in the strip-shaped regions 5 formed on both sides of the virtual straight line 8. Band-shaped area 5 above
Is 2 substantially parallel to the virtual straight line 8 in the plan view.
It is formed between virtual straight lines 9a and 9b (for the sake of convenience, these virtual straight lines are indicated by two-dot chain lines in the figure).

As shown in FIG. 3, the above-mentioned strip-shaped region 5, that is, the virtual straight lines 9a and 9b, is a cross-sectional view of the watering head (that is, FIG. 3) which passes through the top portion 3 and is perpendicular to the virtual straight line 8. , Are formed so as to satisfy the following conditions.

That is, the virtual straight line 9a close to the apex 3 has an elevation angle α with respect to the center (or the center of symmetry) O of the hemispherical portion 1a.
Are provided so as to satisfy the condition of 15 ° ≦ α ≦ 85 °. Further, the virtual straight line 9b far from the top portion 3 is provided such that the elevation angle β with respect to the center O satisfies the condition of 0 ° ≦ β ≦ 60 °. And elevation angle β <elevation angle α
Is. Therefore, the belt-shaped region 5 is formed such that the elevation angle with respect to the center O is within the range of 0 ° to 85 °. More preferably, the belt-shaped region 5 is formed such that the elevation angle is within the range of 15 ° to 85 °.

By forming the strip-shaped regions 5, 5 so as to satisfy the above-mentioned conditions, for example, when watering various vegetables and flowers planted in ridges or trees planted in a straight line, Also, it is not necessary to irrigate areas that do not require irrigation, such as between trees. Therefore, the amount of water used is reduced. That is, the amount of wasted water can be reduced. In addition, the elevation angle is 15 ° to 85 °
Within the range, the impact of the water droplets sprayed on the surface of soil or the like becomes smaller. Therefore, it is possible to spray water more gently without causing water droplets to bounce off. In addition, the above-mentioned elevation angle is, specifically,
For example, it may be set as appropriate according to the size of the soil or the like, the distance from the rising pipe 11 to the desired watering area, the diameter of the holes 2 ,.

Holes 2 formed in the above-mentioned belt-like regions 5
Are bored so that the diameter thereof increases with increasing distance from the top portion 3. However, these holes 2 ... May be drilled so that the diameters thereof gradually increase with increasing distance from the top portion 3, and some adjacent holes 2 ... Are drilled so that their diameters are equal to each other. It may have been done.

The pattern of the strip-shaped regions 5 and 5 in the water sprinkling head 1 shown in FIG. 1, that is, the drilling pattern of the holes 2 ...
An example is shown in which the shape of the watering area for which watering is desired is a rectangle, that is, a band shape. Therefore, the drilling pattern of the holes 2 ... Is not limited to the pattern illustrated in FIG. The reason for setting the diameters of the holes 2 ... As described above will be described later.

The material of the sprinkling head 1 is not particularly limited, but a material excellent in weather resistance, impact resistance, chemical resistance, etc. is preferable, and for example, metal, synthetic resin, synthetic rubber are preferable. is there. Examples of the metal include stainless steel. Examples of the synthetic resin include high density polyethylene, medium and low density polyethylene, polypropylene, polyvinyl chloride, polyolefin such as ethylene-vinyl acetate copolymer, and acrylonitrile-butadiene styrene resin (A
BS resin), engineering plastics, various reinforced plastics, and the like. These materials are appropriately selected depending on, for example, the application of the watering head 1, that is, the watering device.

The method for producing the sprinkling head 1 is not particularly limited, but a method that is inexpensive and excellent in mass productivity is preferable. For example, when the material is metal, a press working method is preferable, and When the material is synthetic resin or synthetic rubber, the injection molding method is suitable.

The method for forming the holes 2 is not particularly limited, but a method that is inexpensive and excellent in mass productivity is preferable, and so-called laser perforation or drill perforation is preferable.

The riser pipe 11 can be fixed to any position such as soil, but the positions of the holes 2 ... In the hemispherical portion 1a and the hole 2 ... It is preferably fixed to the central part or the corner part of soil or the like.

In general, it has been known that the water droplets fly in the air under a drag force proportional to the square of the velocity. Therefore, if the water pressure and the diameter of the hole 2 are constant, the water droplets sprayed from the hole 2 are: It flies farthest when the elevation angle of hole 2 is set to about 30 °. In addition, since the water droplets diffuse as the flight distance increases, the water spray area increases. That is, when the water pressure and the diameter of the hole 2 are constant, the water spraying area becomes smaller as the elevation angle of the hole 2 becomes larger, so that the water spraying amount per unit area increases. Therefore, in order to make the amount of water sprayed per unit area substantially constant in the entire water spray region, for example, the diameter of the hole 2 drilled at a position away from the top 3, that is, the diameter of the hole 2 having a small elevation angle is set to the top 3. It is necessary to make it larger than the diameter of the hole 2 drilled at the approaching position, that is, the hole 2 having a large elevation angle.

The diameter of the holes 2 ... Is not particularly limited, but is preferably 0.1 mm or more and 2 mm or less. By forming the diameter of the holes 2 ... In the above size, the water droplets sprinkled from the holes 2 ... Are reduced and the impact of the water droplets on the surface of soil or the like is further reduced. Therefore, it is possible to spray water more gently without causing water droplets to bounce off. Hole 2 ...
If the diameter is smaller than 0.1 mm, the water droplets sprinkled from the holes 2 will be small, and the rate of atomization will increase, so it will not fly too far. Moreover, since the amount of water sprayed per unit area becomes small, it becomes impossible to sufficiently spray water by soil or the like. On the other hand, when the diameter of the holes 2 is larger than 2 mm, the water droplets become large, so that the impact of the water droplets on the surface of the soil or the like becomes larger, and the water droplets bounce off and the water is sprayed more gently. It gets harder.

The diameter of the holes 2 ... In this embodiment is set to 0.4 mm to 0.8 mm, for example. Of course, the drilling patterns of the holes 2 ... And the diameters of the respective holes 2 ... Are not limited to the drilling patterns and the diameters illustrated above.

The water pressure applied to the water sprinkling head 1, that is, the holes 2 is not particularly limited. For example, water pipe 1
If directly connected to 0 in general water pipe, said water pressure becomes approximately 1kg / cm ² ~2kg / cm ² approximately. The water pressure is within a predetermined range, for example, 1 kg / cm ^{2 to} 5 kg / cm ² , preferably 1 kg / cm ² to
The water pressure applied to the holes 2 may be appropriately adjusted by using a pump, a pressure reducing valve, a water stopcock, etc., which can be arbitrarily changed within the range of ² kg / cm ² .

As described above, the water sprinkling head 1 of the water sprinkling apparatus according to this embodiment has the hemispherical portion 1a formed in a substantially hemispherical shape having an upward convex shape and has a plurality of holes 2. The hole 2 ...
In the plan view of the surface of the hemispherical portion 1a viewed from the top portion 3 side, the holes are formed in the belt-like regions 5 formed substantially parallel to the virtual straight line 8 passing through the top portion 3.

Therefore, the flight distance of the water drop can be freely set at the position where the holes 2 are formed. Further, for example, by appropriately changing the formation pattern of the band-shaped regions 5, 5, that is, the drilling pattern of the holes 2, it is possible to spray water according to the shape and size of the soil or the like. As a result, it becomes possible to sprinkle water substantially uniformly over the entire surface of the water sprinkling region of any shape and size. In addition, the band-shaped area 5
Since the holes 2 ... Are bored in the inside 5, the water is not sprayed to the area that does not require water spraying. Therefore, the amount of water used can be reduced. That is, the amount of wasted water can be reduced. Furthermore, since it can be installed efficiently, the number of sprinklers arranged in the entire sprinkler area can be reduced as compared with the sprinkler.

Further, in the water sprinkling head 1 of the water sprinkling apparatus according to this embodiment, the strip regions 5, 5 are formed on both sides of the virtual straight line 8 one by one. Therefore, for example, when the watering area is divided into two locations, by installing a watering device, that is, the rising pipe 11 between both watering areas, one watering head 1 can be used for both watering areas. It is possible to spray water at the same time.

Further, in the water sprinkling head 1 of the water sprinkling apparatus according to the present embodiment, in the water sprinkling head sectional view in which the belt-shaped regions 5 and 5 pass through the top portion 3 and are perpendicular to the virtual straight line 8, the elevation angle with respect to the center O. Are formed within the range of 15 ° to 85 °, and the diameter of the holes 2 ... Is set to 0.4 mm to 0.8 mm.
Therefore, the impact of the water drops on the surface of the soil or the like is reduced. Therefore, it is possible to gently spray water without causing water droplets to bounce off. Therefore, the watering by the watering head 1 does not cause a possibility that the seeded seeds flow out or the roots are exposed to hinder the growth of the plant.

Next, the amount of water sprayed by the water spray head 1 according to this embodiment will be described with reference to a specific example. It should be noted that there are two sprinkling areas for which water sprinkling is desired, and these sprinkling areas are rectangular with a predetermined area, and a rising pipe 11 is erected at a predetermined position between both sprinkling areas, and the sprinkling areas are set in these sprinkling areas. We assumed the case of watering without water. Therefore, the belt-shaped regions 5 and 5
The formation pattern, that is, the perforation pattern and diameter of the holes 2 are set to the above-described perforation pattern and diameter (FIG. 1). Then, the diameter of the hemispherical portion 1a of the watering head 1 is set to 5
cm, water volume about 14 L / min., water pressure on hole 2 ... about 2 kg
/ cm ² .

The amount of water sprinkled is measured by arranging a measuring box in a box shape on the soil.
After water was sprinkled from the water sprinkling head 1 for 1 hour, the amount of water accumulated in each of the measurement boxes was measured. As shown in FIG. 5, the water sprinkling amount measured under the above conditions is shown in the graph with the horizontal axis representing the distance from the rising pipe 11 and the vertical axis representing the water sprinkling amount. Watering head 1
The amount of water sprinkled in was (a).

On the other hand, the water sprinkling amount was also measured for a sprinkler which is a conventional water sprinkling device. The water pressure applied to the sprinkler head (hereinafter referred to as the head) of the sprinkler, the amount of water, and the like were the same as those of the sprinkler head 1. In addition, the opening area of the nozzle of the head is such that the holes 2 ...
Was set to be equal to the total opening area of The amount of water sprayed from the head was curve (b).

As is clear from the above graph, it can be seen that the water sprinkling head 1 can sprinkle water almost uniformly over the entire surface of the water sprinkling region. On the other hand, it can be seen that the head cannot uniformly spray water.

In this embodiment, the water sprinkling head 1 capable of sprinkling water in a rectangular water sprinkling area has been taken as an example. However, the sprinkling head 1 can sprinkle water, that is, the soil. Of course, the shape is not limited to the rectangle illustrated above, and may be any shape such as a square, another polygon, a circle, an ellipse, or the like. Also,
The size of soil that can be sprinkled can also be any size. The combination of the hole 2 ...
It may be appropriately changed depending on the shape of the soil, the amount of water sprinkled, and the like.

In the present embodiment, the sprinkling head 1 capable of simultaneously sprinkling water in two sprinkling areas has been taken as an example, but the number of points that can be sprinkled simultaneously by the sprinkling head 1 is, of course, The present invention is not limited to the above two locations. That is, for example, when water is sprayed simultaneously on three water spray regions, three strip-shaped regions may be formed. Therefore,
The number of band-shaped regions formed is not limited to the two illustrated above. However, for example, when watering various vegetables and flowers planted in the ridges, or trees that are linearly planted, at least one strip-shaped region is formed on both sides of the virtual straight line 8. Is preferred. When a plurality of strip-shaped regions are formed, the relative positional relationship of these strip-shaped regions is not particularly limited.

The watering device having the watering head 1 having the above-mentioned structure is, for example, a field for cultivating various vegetables and flowers in the open field, a vegetable garden, a vinyl house, an orchard, a park or a garden where lawns and flowers are planted. It is preferably used for irrigation or water sprinkling on roads.

In the above embodiment, the case where the liquid sprinkling device is used as the water sprinkling device has been described as an example, but the liquid sprinkled by the liquid sprinkling device according to the present invention is, of course, the above water. It is not limited to. For example, by using the liquid spraying device for agriculture, horticulture, and the like, it is possible to preferably spray agricultural chemicals such as insecticides and fungicides, liquid fertilizers, and the like. In addition, by spraying water, the liquid spraying device can be used as a salt damage control device or a frost damage control device for tea fields.

[0044]

As described above, the liquid spraying head of the liquid spraying device according to the first aspect of the present invention is the liquid spraying head provided on the rising pipe of the liquid spraying device. The part is formed in a substantially hemispherical shape that is convex upward, and has a plurality of holes that can disperse liquid in the dispersal region, and the hole is a plan view of the substantially hemispherical surface viewed from the top side thereof. , Is formed in a band-shaped region formed substantially parallel to an imaginary straight line passing through the apex.

As a result, it becomes possible to spray the liquid substantially uniformly over the entire surface of the spraying area having an arbitrary shape and size. Further, since the holes are formed in the band-shaped area, the liquid is not sprayed to the area that does not require spraying. Therefore, the amount of liquid used can be reduced. That is, the amount of wasted liquid can be reduced. Furthermore, since it can be efficiently installed, there is an effect that the number of the liquid spraying devices arranged in the entire spraying region can be reduced as compared with the sprinkler.

In the liquid spraying head of the liquid spraying device according to the second aspect of the present invention, as described above, at least one strip-shaped region is formed on each side of the virtual straight line.

Thus, for example, when the spraying area is divided into two areas, by installing a liquid spraying device between both spraying areas, one spraying head can simultaneously cover both spraying areas. The liquid can be sprayed.

As described above, in the liquid sprinkling head of the liquid sprinkling apparatus according to the third aspect of the present invention, in the liquid sprinkling head cross-sectional view which passes through the top portion and is perpendicular to the virtual straight line, The elevation angle with respect to the center of the hemisphere is formed within the range of 0 ° to 85 °.

As a result, the same effect as described above can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a sprinkling head as a sprinkling head in an embodiment of the present invention.

FIG. 2 is a front view of the watering head.

FIG. 3 is a cross-sectional view of a main part of the water spraying head, for explaining the formation position of the band-shaped region in the watering head.

FIG. 4 is a schematic front view of a water sprinkler as a liquid sprinkler having the water sprinkling head.

FIG. 5 is a graph showing a watering amount in a watering area of the watering head.

[Explanation of symbols]

 1 Water sprinkling head (sprinkling head) 1a Hemisphere 2 Hole 3 Top 5 Band-shaped area 8 Virtual straight line 9a ・ 9b Virtual straight line 11 Rise pipe 12 Mounting jig O Center (center of hemisphere) α ・ β Elevation angle

Claims (3)

[Claims] 1. A sprinkling head provided on a rising pipe of a liquid sprinkling device, wherein the sprinkling head is formed in a substantially hemispherical shape that is convex upward, and is capable of spraying a liquid in a spraying area. In the plan view of the substantially hemispherical surface viewed from the top side, the holes are formed in a band-shaped region formed substantially parallel to an imaginary straight line passing through the top. The spray head of the liquid spraying device. 2. The sprinkling head of a liquid sprinkling apparatus according to claim 1, wherein at least one strip-shaped region is formed on each side of the virtual straight line. 3. The strip-shaped region is formed such that an elevation angle with respect to the center of the hemisphere is within a range of 0 ° to 85 ° in a cross-sectional view of a sprinkling head that passes through the top and is perpendicular to the virtual straight line. The spray head of the liquid spray device according to claim 1 or 2.