Drip-irrigating dripper and drip irrigation device

Patent metadata

Field	Value
Publication number	US-9258950-B2
Application number	US-201314425666-A
Country	US
Kind code	B2
Filing date	Sep 5, 2013
Priority date	Sep 6, 2012
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

A dripper obtained by incorporating together a first member and second member, which are both resin moldings. The first member is on the side into which an irrigating solution flows, and the second member is on the side from which the irrigating solution is discharged. The dripper has an inflow part having a low-pressure stop filter function, and/or a diaphragm part for narrowing a flow path by elevating the hydraulic pressure of the irrigating solution. The dripper makes it possible to stabilize the amount of irrigating solution discharged, irrespective of the hydraulic pressure of the irrigating solution, and also makes it possible to reduce costs.

First claim

The invention claimed is:

1. A drip irrigation dripper for controlling an ejection amount of irrigation liquid, having flowed from an inflow part, from an ejection port to eject the irrigation liquid, the drip irrigation dripper comprising:
a first member integrally formed of a resin material and composing one part on the inflow part side of the drip irrigation dripper; and
a second member integrally formed of a resin material and composing the other part on the ejection port side of the drip irrigation dripper, the second member being fixed to the first member,
wherein:
the first member includes:
a first plate-like part having a first inner surface to be brought into close contact with the second member and a first outer surface at a side opposite to the first inner surface,
a first protrusion part being protruded from the first outer surface toward a side opposite to the second member and having the inflow part at a tip portion of the first protrusion part,
a first guide channel formed from the inflow part to the first inner surface and guiding the irrigation liquid having flowed from the inflow part toward the first inner surface, and
a pressure reduction channel part for forming, between the first inner surface and the second member, a pressure reduction channel connected continuously to a terminal of an inner surface of the first guide channel and allowing the irrigation liquid having been guided by the first guide channel to flow toward the ejection port while reducing a pressure of the irrigation liquid; and
the second member includes:
a second plate-like part having a second inner surface to be brought into close contact with the first inner surface and forming the pressure reduction channel together with the pressure reduction channel part and a second outer surface at a side opposite to the second inner surface,
a second guide channel formed from a terminal position of the pressure reduction channel at the second inner surface to the ejection port and for guiding the irrigation liquid of which pressure is reduced by the pressure reduction channel to the ejection port, and
a diaphragm part formed at a terminal of the first guide channel to form a part of an inner surface of the second guide channel and being to be deformed toward the second guide channel upon receiving a liquid pressure of the irrigation liquid having been guided by the first guide channel to regulate a width of the second guide channel to be smaller as the liquid pressure is increased.

2. The drip irrigation dripper according to claim 1 , wherein the diaphragm part includes:
a dome-shaped center wall part curved to be protruded toward the first member;
a peripheral wall part connected to an outer peripheral end of the center wall part to surround the center wall part and being inclined toward the first member as being outward from the center wall part in a radial direction of the center wall part when viewed in a plan view; and wherein
a connection part, between the center wall part and the peripheral wall part, is configured to regulate the width of the second guide channel.

3. The drip irrigation dripper according to claim 2 , wherein an end edge portion on the connection part side of each of the center wall part and the peripheral wall part has a thinner wall thickness than the connection part and portions other than the end edge portion of the center wall part.

4. The drip irrigation dripper according to claim 1 , wherein a starting end of the second guide channel is disposed in the vicinity of the diaphragm part.

5. The drip irrigation dripper according to claim 1 , wherein the ejection port opens to the second outer surface.

6. The drip irrigation dripper according to claim 1 , wherein the ejection port is formed at a tip portion of a second protrusion part protruded from the second outer surface toward a side opposite to the first member.

7. A drip irrigation apparatus comprising:
the drip irrigation dripper according to claim 1 ; and
a flow tube through which the irrigation liquid flows,
wherein:
when the first protrusion part of the drip irrigation dripper is inserted into a tube wall or an opening of the flow tube, the irrigation liquid in the flows tube to flow into a channel of the drip irrigation dripper from the inflow part.

8. A drip irrigation dripper for controlling an ejection amount of irrigation liquid, having flowed from an inflow part, from an ejection port to eject the irrigation liquid, the drip irrigation dripper comprising:
a plate-like body having a first outer surface on the inflow part side of the drip irrigation dripper and a second outer surface on the ejection port side at a side opposite to the first outer surface;
a first protrusion part being protruded from the first outer surface toward a side opposite to the second outer surface and having the inflow part at a tip portion of the first protrusion part;
a first guide channel formed from the inflow part into the plate-like body and guiding the irrigation liquid having flowed from the inflow part into the plate-like body;
a pressure reduction channel formed to be connected to a terminal of the first guide channel to allow the irrigation liquid having been guided by the first guide channel to flow toward the ejection port while reducing a pressure of the irrigation liquid; and
a second guide channel formed from a position connected to a terminal of the pressure reduction channel inside the plate-like body to the ejection port disposed on the second outer surface side of the drip irrigation dripper and for guiding the irrigation liquid of which pressure is reduced by the pressure reduction channel to the ejection port, wherein:
the inflow part has hydrophobicity and prevents the irrigation liquid having a liquid pressure less than a predetermined liquid pressure from flowing into the inflow part.

9. The drip irrigation dripper according to claim 8 , wherein:
the inflow part includes a substrate part that partially shields a starting end of the first guide channel,
the substrate part includes a plurality of inflow ports extending through the substrate part, and
at least a surface on a side, of the substrate part, opposite to the first guide channel has hydrophobicity.

10. The drip irrigation dripper according to claim 9 , wherein an inner peripheral surface of each of the inflow ports also has hydrophobicity.

11. The drip irrigation dripper according to claim 9 , wherein the inflow part comprises a hydrophobic material having hydrophobicity.

12. The drip irrigation dripper according to claim 9 , wherein the inflow part includes hydrophobic coating having hydrophobicity.

13. The drip irrigation dripper according to claim 11 , wherein the inflow part has, on a hydrophobic surface, an irregular shape that reinforces the hydrophobicity.

14. The drip irrigation dripper according to claim 8 , further comprising:
a diaphragm part formed at the terminal of the first guide channel to form a part of an inner surface of the second guide channel and being to be deformed toward the second guide channel upon receiving the liquid pressure of the irrigation liquid having been guided by the first guide channel, the diaphragm part being for regulating a width of the second guide channel to be smaller as the liquid pressure is increased.

15. The drip irrigation dripper according to claim 14 , comprising:
a first member integrally formed of a resin material and composing one part on the inflow part side of the drip irrigation dripper; and
a second member integrally formed of a resin material and composing the other part on the ejection port sid

Assignees

• Enplas Corp

Inventors

• Kidachi Masahiro

Classifications

• B05B1/14

  with multiple outlet openings (B05B1/02, B05B1/26 take precedence); with strainers in or outside the outlet opening · CPC title

• A01G25/023 Primary

  Dispensing fittings for drip irrigation, e.g. drippers · CPC title

• B05B1/02

  designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, {or having an outlet of particular shape}(B05B1/26, B05B1/28, B05B1/34 take precedence) · CPC title

• B05B1/3006

  the controlling element being actuated by the pressure of the fluid to be sprayed (B05B1/323 takes precedence; single-unit outlet valves actuated by the pressure of the fluid to be sprayed B05B11/0062) · CPC title

• B05B15/00

  Details of spraying plant or spraying apparatus not otherwise provided for; Accessories · CPC title