Abstract:
An emitter is arranged inside a tube and has: an emitter main body that is constituted by a resin molded body that has at least a recessed part and a through hole; and a flexible film that is joined to at least one surface of the emitter main body and that forms a flow path by closing off the recessed part and an opening part of at least one part the through hole. The emitter has a discharge amount adjusting part that is for making adjustments in accordance with the water pressure inside the tube. When the pressure of an irrigation liquid that is inside the tube is at or above a set value, the film slackens, and the discharge amount adjusting part narrows the flow path of the liquid and reduces flow rate.
Abstract:
A dripper (120) comprises a dripper main body (121) and a movable unit (122). The moveable unit (122) forms the ceiling of a pressure reducing flow path (125) that reduces the pressure of a liquid flowing in the dripper (120), and the moveable unit advances and retracts in accordance with the pressure of the fluid in a tube (110). If the pressure is high, the height of the pressure reducing flow path (125) becomes lower and the flow rate of the liquid in the dripper (120) is thereby restricted. As a result, the flow rate of liquid discharged from a through hole (130) in the tube (110) can be maintained at a substantially constant rate regardless of the aforementioned pressure.
Abstract:
A dripper for drip irrigation according to the present invention comprises a first member and a second member that are formed integrally from a resin material, and includes an inter-member flow passage formed between the members. The first member is provided with a first plate and a pipe that guides an irrigation liquid, which flows in from an inflow part, to the inter-member flow passage. The second member is provided with a second plate and a discharge port. The first member is further provided with a flow regulation valve that regulates the flow of the irrigation liquid, and the second member is provided with a flow-volume control valve that controls the flow volume of the irrigation liquid.
Abstract:
An emitter forms a flow path that runs to a discharge part from a water collecting part for receiving an irrigation liquid in a tube. The flow path includes a flow rate control part which includes: an end surface including a concave inclined surface that faces a film for receiving the pressure of the liquid inside the tube; a hole that opens at the center of the flow volume control part and connects to the discharge part; and a groove crossing the inclined surface and running to the hole. When the film adheres to the inclined surface as a result of the pressure of the irrigation liquid inside the tube, the flow volume of the irrigation liquid inside the emitter is controlled so as to be a volume that can pass through the groove.
Abstract:
In the present invention, the pressure reducing flow path reduces the pressure of an irrigation liquid, and guides the irrigation liquid to the flow-rate decreasing part. The bypass flow path guides the irrigation liquid to the flow path opening/closing part in a state where the pressure of the irrigation liquid is maintained at a pressure higher than that of the irrigation liquid that has passed through the pressure reducing flow path. When the pressure of the irrigation liquid is lower than a first pressure, the irrigation liquid passes through the pressure reducing flow path and the bypass flow path to be guided to the discharge part. When the pressure of the irrigation liquid is a second pressure or higher, the irrigation liquid passes through the pressure reducing flow path to be guided to the discharge part.
Abstract:
This emitter (120) includes a channel which spans to a recessed section (252), from an intake path (221) for receiving an irrigation liquid inside a tube. The channel includes an aperture (243) which is closed by a lid (244) disposed so as to not be in contact with a film (300). A groove is formed at the periphery of the aperture (243). When the film (300) is pressed as a result of the pressure of the irrigation liquid inside the tube, and the lid (244) closes the aperture (243), the flow rate of the irrigation liquid inside the emitter (120) is controlled so as to be the amount capable of passing through the groove. This flow-rate control continues until the pressure difference in the channel between a side upstream with respect to the lid (244) and a side downstream with respect to the lid (244) has been sufficiently reduced.
Abstract:
Provided is an emitter (120) comprising a flow path that leads from an intake path (221) for taking in irrigation liquid that is within a tube to a recessed section (252). The flow path comprises opening/closing sections (248) that are arranged with a gap (249) therebetween. The gap (249) communicates with a discharge section. When the opening/closing sections (248) are pushed by the pressure of the irrigation fluid within a recessed section (242), the tip sections of each of the opening/closing sections (248) are brought into contact and one part of the gap (249) is blocked. The flow rate of the irrigation fluid within the emitter (120) is controlled by the remaining amount of said irrigation fluid that is capable of passing through the gap (249).
Abstract:
An emitter (120) is arranged inside a tube and is constituted by a resin molded body that has at least a recessed part and a through hole. The emitter (120) has a screen part, an intake volume adjusting part, a pressure reducing part, a discharge volume adjusting part, and a discharge part. The screen part is constituted by a slit (301) and a recessed part that intersects the slit (301) when seen in plan view. The discharge part includes an infiltration preventing part that is for preventing the infiltration of foreign matter from the discharge opening of the tube.
Abstract:
The drip irrigation tube (100) comprises a tube (110), drippers (120), and guides (140). With respect to individual discharge openings (130), the guides (140) are disposed on both sides of the discharge opening (130) in the longitudinal direction of the tube (110). The guides (140) protrude from the outer circumferential surface of the tube (110). The guides (140) intercept the flow of liquid from the discharge openings (130) in the longitudinal direction and guide same vertically downward. The liquid is dripped on the soil from the discharge openings (130) or the vicinity of the discharge openings (130).