DESC:FLUID SPRAY SYSTEM WITH ORIFICES

TECHNICAL FIELD
[001] The present disclosure described herein, in general, relates to irrigation systems more particularly to fluid spray tubing systems used for irrigation having orifice holes.

BACKGROUND
[002] A Spray tube is an irrigation tube made of polyethylene in which plurality of orifice holes are provided on the wall/periphery or circumference of the spray tube. These orifice holes are provided at different locations on the circumference. Holes are made either in single plane or in multiple planes (at different locations). A set of such orifice holes are repeated throughout the length of the spray tube. During irrigation, water is sprayed through these orifice holes in the form of jets to obtain uniform distribution. Further the spray from the spray tube may overlap with another tubing placed parallel at a specified distance to create intricate pattern of water distribution.

SUMMARY
[003] This summary is provided to introduce concepts related to a spray tube and the concepts are further described below in the detailed description. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.

[004] In one aspect of the present disclosure, a spray system is disclosed. The spray system comprises a plurality of spray tubes positioned in a pattern, wherein each spray tube comprises: a plurality of orifices of a plurality of geometries, placed at a plurality of predetermined locations on a periphery of the spray tube, wherein the plurality of spray tubes (2.1, 2.4, 2.5) is placed at a uniform or variable spacing with each other for a length to obtain at least one predetermined wetting patterns.

[005] In another aspect of the present disclosure, a spray system is disclosed. The spray system comprises a plurality of spray tubes positioned in a pattern, wherein each spray tube comprises: a set of orifices of a geometry placed at a predetermined locations on a periphery of the spray tube, wherein the plurality of spray tubes is placed at a uniform or variable spacing with each other for a length to obtain at least one predetermined wetting patterns.

[006] In yet another aspect of the present disclosure, a spray tube is disclosed. The spray tube comprises a plurality of orifice holes, that are configured to have a plurality of geometries of a same shape or different shapes, wherein a fluid jet spreads irrigating fluid such as water, on a larger surface area. Further the plurality of orifices having the specific geometries are placed at pre-determined locations on a periphery of the spray tube to obtain uniform distribution of water.

BRIEF DESCRIPTION OF THE DRAWINGS
[007] Figure 1 illustrates an exemplary of prior art
[008] Figure 2 illustrates a plurality of spray tubes in accordance with the present disclosure.
[009] Figure 3 illustrates an exemplary embodiment of the orifice in accordance with the present disclosure.
[0010] Figure 4 illustrates an exemplary embodiment of the orifice geometry in accordance with the present disclosure.
[0011] Figure 5 illustrates an exemplary embodiment of the orifice geometry in accordance with the present disclosure.
[0012] Figure 6 illustrates an exemplary embodiment of the orifice geometries in accordance with the present disclosure.
[0013] Figure 7 illustrates an exemplary embodiment of the position of the orifice in accordance with the present disclosure.
[0014] Figure 8 illustrates an exemplary embodiment of the position of the orifice in accordance with the present disclosure.
[0015] Figure 9 illustrates an exemplary embodiment of the position of the orifice in accordance with the present disclosure.
[0016] Figure 10 illustrates an exemplary spray trajectory in accordance with the present disclosure.
[0017] Figure 11 illustrates an exemplary position of spray tube in accordance with the present disclosure.

DETAILED DESCRIPTION
[0018] The present disclosure discloses a spray tube comprising a plurality orifices. The geometries of holes of the plurality of orifices are made such that the fluid particles of the fluid jet from the spray tube are spread on a larger surface area. The plurality of orifices may be positioned at a plurality of pre-determined locations on a periphery of the spray tube. The positions of the plurality of orifices are determined such that the spray jet of the fluid exiting from the plurality of the orifices obtains a uniform distribution of irrigating fluid such as water when a plurality of spray tubes are placed substantially parallel to each other and a liquid jet is spread on the same ground surface. The irrigating fluid may be, but is not limited to, water or other aqueous solutions. An effective diameter of these geometries of orifices may be maintained to obtain a fairly low flow rate to achieve longer running lengths for a pressure drop of 20 percent of the inlet pressure of the spray tube as compared to the conventional spray tubes.

[0019] In a known prior art as described in figure 1, a spray tube has around seven orifice holes positioned at a distance of 40 mm to 50 mm. Orifice hole diameter is ranging between 0.4 mm to 0.7 mm. Out of seven holes, three holes are positioned on one side of the tube, one hole is at the centre of the tube and remaining three holes are positioned on the other side of the tube. Limitations of this prior art are: (1) holes are in circular shape due to which water is not evenly dispersed on the ground, (2) all the seven holes are of same size and delivers more water at particular space, (3) spacing between the holes is about 40 to 50 mm and hence emits more water in smaller stretch, and resulting to risks non uniform application rate resulting in non-uniform crop growth or even crop damage, (4) due to higher flow, running length for 20 % head variation is less as compared to present invention.

[0020] Referring to Figure 2, illustrates a spray system (2), wherein plurality of spray tubes are positioned in a defined pattern. The exemplary embodiment as illustrated has a plurality of orifices/holes on the plurality of spray tubes, wherein the plurality of orifices/holes have geometry usually circular and is made using either a laser drilling, mechanical drilling or by any other suitable method of drilling or punching.

[0021] Further in accordance with the Figure 2, the plurality of spray tubes (2.1, 2.4 and 2.5) may be placed at a spacing, for example for 20 mm within each other for a length, of 3 meters. Further points 2.3 and 2.7 illustrate a wetting patterns of fluid jet spray obtained from hole no. 1 and hole no. 4 from plurality of orifices/holes, whereas point 2.2 and 2.6 illustrate a wetting patterns of fluid jet spray obtained from hole no. 2 and hole no. 3 respectively.

[0022] The present disclosure discloses geometries and position of orifice holes such that they may obstructs partially and breaks the fluid jet to spread the water/fluid particles on a larger surface area. Further the position of these orifices/holes may affect the uniform distribution of irrigating fluid. Further the effective diameter of these geometries of orifices may be maintained to obtain fairly low flow to achieve longer running lengths for a pressure drop of 20 percentage of pressure at the inlet of the spray tube as compared to conventional spray tubes.

[0023] Referring to Figure 3 illustrates Orifice holes in accordance with the present disclosure. The orifice geometry as illustrated may be made from joining of two adjacent circular holes. The two circular holes may have a diameter A and diameter B with centrally connected channel having width C. The diameter A and B of circular holes can vary from 0.2mm to 1 mm. More specifically, diameter A and B of circular holes can be between 0.3 to 0.6mm. Width C of centrally connected channel can be 0.2 mm to 0.9mm. More specifically, width C of centrally connected channel can be 0.2mm to 0.5 mm. Centre to centre distance between two circular holes A and B can varies from 0.2 mm to 2.5 mm.

[0024] Further Figure 4 illustrates various geometry for the orifice. In accordance with the orifice as illustrated in Figure 4, a flap type of obstruction is provided in oval shaped orifice to break the jet of water/fluid. An oval shape having major diameter of H and Minor diameter of G. Major diameter H ranges between 0.2mm to 0.5 mm more preferably 0.3 mm to 0.45 mm. Minor diameter G ranges between 0.1 mm to 0.5 mm more preferably 0.2 mm to 0.4 mm. This oval shaped orifice further described to have a polygonal flap to create obstruction to the jet stream so that water/fluid will spread over larger surface area. The geometry described in exemplary embodiment is of triangular shape having an apex angle of E. The polygonal flaps are positioned on both ends of major diameter H in such a way that the distance between apex or one end of polygonal obstruction and end of major diameter is F. Value of F ranges between 0.1mm to 0.5 mm

[0025] Referring to Figure 5 illustrates Orifice holes in accordance with the present disclosure. The orifice geometry as illustrated may be made Oval kind of shape. The major axis of hole is of dimension “n” which is in between 0.4 to 0.6 mm. The minor axis of “m” which is between 0.2 to 0.4 mm.

[0026] Figure 6 illustrates different possible geometries of orifice. The possible geometries may comprise a circular shape, an oval shape, and a polygonal shape. As shown in figure 6, the possible geometries may be a circular, a triangular, a rectangular, a hexagon and star shapes.

[0027] Figure 7 and Figure 8 illustrate location of the plurality of orifices on a spray tube in accordance with the present disclosure. In accordance with the present disclosure a set maybe a group of orifice holes. A set can have a single orifice hole or plurality of the holes positioned in such a way to achieve uniform spreading. Further as illustrated in the present disclosure a set of four orifice holes maybe provided or configured to achieve uniform distribution with minimum flow rate per set. This set may further comprise of two subsets. As described in figure 7, subset 1 may be represented by orifice hole no.1 and 2 may be maintained on one side of the tubes centre whereas as described in figure 8, subset 2 may comprise of orifice hole 3 and 4 and can be located on other side of the centre of the tube. Combination of effective hole diameter in any subset is such that orifice hole with larger effective diameter shall provide water/fluid spreading over a larger surface area and orifice hole with smaller effective hole diameter shall provide water/fluid spreading over comparatively smaller surface area.

[0028] Position of the orifice hole depends on diameter of the tubing. For example, in present disclosure referring to figure. 9 and figure. 10 for 20mm outside diameter tubing with wall thickness of 200 micron, first orifice hole is positioned at an angle, a , of 40 +/- 10 degrees to horizontal axis passing through centre of the tube to cover longer distance of throw. Second orifice hole is positioned at an angle, ß, of 70 +/- 10 degrees to horizontal axis passing through centre of the tube to cover nearer area. Third orifice hole is positioned at an angle of O, of 110 +/- 10 degrees to horizontal axis passing through centre of the tube. Fourth orifice hole is positioned at an angle of ?, of 150 +/- 10 degrees to horizontal axis passing through centre of the tube. Effective diameter of first and fourth (hole no. 1 and hole no. 4) orifice hole shall be maintained between 0.4 to 0.8 mm more preferably between 0.5 to 0.6mm and effective diameter of second and third orifice hole (hole no. 2 and hole no. 3) shall be maintained between 0.2 to 0.6mm more preferably 0.3 to 0.5 mm to achieve optimum results. Effective diameter means diameter of an imaginary circle having an area equal to summation of areas of orifices at a given hole position.

[0029] In an exemplary embodiment of the present disclosure spacing between orifice holes is adjusted in such a way to achieve uniform coverage of water/fluid spreading. For example, in a present invention, referring to fig. 8, for 20mm outside diameter tubing, spacing, ‘X’, between orifice hole no. 1 and 2 of subset no. 1 is adjusted to 140mm to achieve uniform coverage of spreading. Value of ‘X’ can vary between 40 to 200 mm. Similarly referring to figure 8, spacing, ‘Y’, between orifice hole no. 3 and 4 of subset no.2 is adjusted to 140mm. Value of ‘Y’ can vary between 40 to 200 mm. Spacing between two orifice holes in any subset can be between 40 mm to 200 mm, more preferably between 120 to 160 mm.

[0030] Further the spacing between spray tubing also plays important role. Any two-spray tubing running parallel with similar set of orifice holes across the length of tubing’s shall be placed at a distance, ‘Z’, as illustrated in Figure 11. Value of ‘Z’ can vary between 1.5 to 4.5 m. More preferably distance ‘Z’ shall be between 2.5 to 3.5 m to achieve high distribution uniformity.

[0031] In another embodiment of the present disclosure, a spray tube, comprising: a plurality of orifices of a plurality of geometries, placed at a plurality of pre-determined locations on a periphery of the spray tube, wherein the plurality of orifices of the plurality of geometries, are configured to obstruct partially and break a fluid jet to spread an irrigating fluid, such as water, to a large surface area.

[0032] The effective diameter of the plurality these geometries of orifices, is maintained to obtain a low flow rate in longer running lengths. The effective diameter of the plurality these geometries of orifices, is maintained for a pressure drop of at least 20 percentage of pressure at an inlet of the spray tube.

[0033] The plurality of geometries comprise a circular shape, an oval shape, and a polygonal shape.

[0034] The oval shape geometry is made from joining of at least two adjacent circular holes.

[0035] The plurality of orifices placed at a plurality of pre-determined locations on a periphery of the spray tube at a pre-determined angle based on a diameter of the spray tubing.

[0036] Each orifice comprises a flap to create an obstruction to the fluid jet.

[0037] The flap has a polygonal shape. The flap is positioned on both ends of major diameter of the geometry of the orifice.

[0038] A spacing between orifices adjusted to form a uniform coverage of spreading.

[0039] In another embodiment of the present disclosure, a spray tube, comprising: a set of orifices of a geometry placed at a predetermined locations on periphery of the spray tube.

[0040] In one implementation of the present disclosure, the set of orifices comprises at least one orifice. In another implementation of the present disclosure, the set of orifices comprises a plurality of orifices.

[0041] The set of orifices comprise at least two sub sets. The at least two sub sets comprise a plurality of orifices placed at a first side of centre of the spray tube. The at least two sub sets comprise a plurality of orifices placed at a second side of centre of the spray tube.

[0042] In another embodiment of the present disclosure, a spray system comprising a plurality of spray tubes positioned in a pattern or a pre-defined pattern, wherein each spray tube comprises: a plurality of orifices of a plurality of geometries, placed at a plurality of predetermined locations on a periphery of the spray tube.

[0043] The plurality of spray tubes is placed at a uniform or a variable spacing with each other for a length to obtain one or more predetermined wetting patterns. The plurality of spray tubes with similar set of orifices positioned, across the entire length of spray tubing, are placed substantially parallel with a uniform distancing “Z” to each other and fluid jet is spread on the same ground surface. The predetermined wetting patterns comprise a shape selected from an oval and a circular shape.

[0044] The present disclosure discloses geometries of orifice holes made in such a way that the geometries distracts the water jet to spread the water particles on a larger surface area. Further, locations of these geometries of orifices are designed in such a way that the set of orifice holes can obtain uniform distribution of water. The effective diameter of these geometries of orifices are maintained to obtain fairly low flow to achieve longer running lengths for a lower pressure drop across the tube as compare to conventional spray tubes.

[0045] The above description along with the accompanying drawings is intended to disclose and describe the preferred embodiments of the invention in sufficient detail to enable those skilled in the art to practice the invention. It should not be interpreted as limiting the scope of the invention. Those skilled in the art to which the invention relates will appreciate that many variations of the exemplary implementations and other implementations exist within the scope of the claimed invention. Various changes in the form and detail may be made therein without departing from its spirit and scope. Similarly, various aspects of the present invention may be advantageously practiced by incorporating all features or certain sub-combinations of the features.

,CLAIMS:WE CLAIM:
1. A spray system (2), comprising:
a plurality of spray tubes (2.1, 2.4, 2.5) positioned in a pattern, wherein each spray tube comprises:
a plurality of orifices of a plurality of geometries, placed at a plurality of predetermined locations on a periphery of the spray tube;
wherein the plurality of spray tubes (2.1, 2.4, 2.5) is placed at a uniform or variable spacing with each other for a length to obtain at least one predetermined wetting patterns (2.2, 2.3, 2.6, 2.7).

2. The spray system as claimed in claim 1, wherein the plurality of spray tubes (2.1, 2.4, 2.5) are placed substantially parallel with a uniform distancing “Z” to each other and a fluid jet is spread on the same ground surface.

3. The spray system as claimed in claim 1, wherein the predetermined wetting patterns (2.2, 2.3, 2.6, 2.7) comprise a shape selected from an oval and a circular shape.

4. The spray system as claimed in claim 1, wherein the plurality of orifices are configured to obstruct partially and break a fluid jet to spread irrigating fluid to a large surface area.

5. The spray system as claimed in claim 1, wherein a plurality of geometries comprise a circular shape, an oval shape, and a polygonal shape.

6. The spray system as claimed in claim 5, wherein the oval shape geometry is made from joining of at least two adjacent circular holes.

7. The spray system as claimed in claim 1, wherein the plurality of orifices are placed at a plurality of pre-determined locations on a periphery of the spray tube at a pre-determined angle based on a diameter of the spray tubing.

8. The spray system as claimed in claim 1, wherein each orifice comprises a flap to create an obstruction to a fluid jet.

9. The spray system as claimed in claim 8, wherein the flap has a polygonal shape.

10. The spray system as claimed in claim 8, wherein the flap is positioned on both ends of a major diameter of the geometry of the orifice.

11. The spray system as claimed in claim 1, wherein a spacing between the plurality of orifices is adjusted to obtain a uniform coverage of spreading of irritating fluid.

12. The spray system as claimed in claim 1, wherein an effective diameter of the plurality these geometries of orifices, is maintained to obtain a low flow rate in longer running lengths.

13. The spray system as claimed in claim 1, wherein an effective diameter of the plurality these geometries of orifices, is maintained for a pressure drop of at least 20 percentage of pressure at an inlet of the spray tube.

14. A spray system, comprising:
a plurality of spray tubes positioned in a pattern, wherein each spray tube comprises:
a set of orifices of a geometry placed at a predetermined locations on a periphery of the spray tube;
wherein the plurality of spray tubes is placed at a uniform or variable spacing with each other for a length to obtain at least one predetermined wetting patterns.

15. The spray system as claimed in claim 14, wherein the set of orifices comprises at least one orifice or a plurality of orifices.

16. The spray system as claimed in claim 14, wherein the set of orifices comprise at least two sub sets.

17. The spray system as claimed in claim 14, wherein at least two sub sets comprise a plurality of orifices placed at a first side of centre of the spray tube.

18. The spray system as claimed in claim 14, wherein at least two sub sets comprise a plurality of orifices placed at a second side of centre of the spray tube.