Emitter and drip irrigation tube

Patent metadata

Field	Value
Publication number	US-2021037726-A1
Application number	US-201916963867-A
Country	US
Kind code	A1
Filing date	Jan 18, 2019
Priority date	Jan 23, 2018
Publication date	Feb 11, 2021
Grant date	—

Abstract

An emitter provided with: a water intake part that communicates with the interior of a tube when the emitter is joined to the tube; a pressure-reducing flow channel part for forming a pressure-reducing flow channel; a flow rate adjustment part for adjusting the flow rate of the irrigation liquid in accordance with the pressure of the irrigation liquid inside the tube; and a discharge part that faces a discharge opening. The flow rate adjustment part has: a base; an accommodation part that accommodates the base; a communication hole that opens to the base and communicates with the discharge part; and a diaphragm part that is flexible and is disposed so as to be separated from the base, the diaphragm part approaching the base when the pressure of the irrigation liquid inside the tube is received.

First claim

1 . An emitter configured to be joined on an inner wall surface of a tube configured to carry irrigation liquid at a position corresponding to a discharging port configured to communicate between inside and outside of the tube, the emitter being configured to quantitatively discharge the irrigation liquid in the tube to the outside of the tube from the discharging port, the emitter comprising:
an intake part configured to communicate with the inside of the tube when the emitter is joined to the tube; a pressure reducing channel part communicated with the intake part and configured to form a pressure reducing channel, the pressure reducing channel being configured to carry the irrigation liquid while reducing a pressure of the irrigation liquid; a flow rate adjusting part communicated with the pressure reducing channel part and configured to adjust a flow rate of the irrigation liquid in accordance with a pressure of the irrigation liquid in the tube; and a discharging part communicated with the flow rate adjusting part and configured to face the discharging port when the emitter is joined to the tube, wherein the flow rate adjusting part includes:
a base,
a housing part configured to house the base,
a communication hole that opens at the base and communicates with the discharging part, and
a diaphragm part having flexibility and disposed away from the base, the diaphragm part being configured to approach the base when the pressure of the irrigation liquid in the tube is exerted on the diaphragm part,
wherein the diaphragm part is provided as one part integrated with the intake part and the pressure reducing channel part, and wherein the base is a member provided separately from the diaphragm part, the intake part and the pressure reducing channel part.

2 . The emitter according to claim 1 , wherein, of the base and the housing part, at least the base includes a clearance formation part configured to form a clearance between the base and the diaphragm part when the pressure of the irrigation liquid in the tube is not exerted on the diaphragm part.

3 . The emitter according to claim 2 , wherein the clearance formation part includes
a first locking part formed in the housing part; and a second locking part formed in the base and configured to be locked with the first locking part.

4 . The emitter according to claim 2 , wherein the clearance formation part includes a tapered part formed in a side surface of the base and having a diameter that decreases toward the diaphragm part.

5 . The emitter according to claim 2 , wherein the clearance formation part includes
a first screw part formed in the housing part; and a second screw part formed in a side surface of the base and configured to be threadedly engaged with the first screw part.

6 . The emitter according to claim 5 , wherein the base includes a holding part configured for holding the base when the base is housed in the housing part.

7 . A drip irrigation tube comprising:
a tube including a discharging port configured to discharge irrigation liquid; and the emitter according to claim 1 that is joined at a position corresponding to the discharging port of an inner wall surface of the tube.

Assignees

• Enplas Corp

Inventors

• Yanagisawa kazuma
• Ono Koki

Classifications

• A01G25/006

  Tubular drip irrigation dispensers mounted coaxially within water feeding tubes · CPC title

• A01G25/023 Primary

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

• A01G25/06

  Watering arrangements making use of perforated pipe-lines located in the soil · CPC title

• A01G27/00

  Self-acting watering devices, e.g. for flower-pots · CPC title

• A01G25/02

  Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation · CPC title