WO2014097638A1 - 点滴灌漑用ドリッパおよびこれを備えた点滴灌漑装置 - Google Patents
点滴灌漑用ドリッパおよびこれを備えた点滴灌漑装置 Download PDFInfo
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- WO2014097638A1 WO2014097638A1 PCT/JP2013/007480 JP2013007480W WO2014097638A1 WO 2014097638 A1 WO2014097638 A1 WO 2014097638A1 JP 2013007480 W JP2013007480 W JP 2013007480W WO 2014097638 A1 WO2014097638 A1 WO 2014097638A1
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- drip irrigation
- groove
- irrigation dripper
- dripper
- longitudinal direction
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- 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
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- 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
- A01G25/023—Dispensing fittings for drip irrigation, e.g. drippers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
- B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
- B05B15/658—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits the spraying apparatus or its outlet axis being perpendicular to the flow conduit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
Definitions
- the present invention relates to a drip irrigation dripper and a drip irrigation apparatus having the drip irrigation, and more particularly to a drip irrigation dripper suitable for plant growth and a drip irrigation apparatus having the drip irrigation apparatus.
- drip irrigation systems have been used as a means of supplying irrigation liquids such as water and liquid fertilizers to plants grown on soil such as farmland and planting.
- this drip irrigation system is a pump that draws water from a water source, a filter, a liquid fertilizer mixing device (chemical addition device if necessary), a backflow prevention device, a main pipe, and a long pipe connected to the end of the main pipe It has a drip irrigation tube.
- the drip irrigation tube is laid on the soil where the plant is grown.
- the drip irrigation tube has a predetermined discharge amount (per unit time) of irrigation liquid in the tube body from a plurality of discharge ports drilled at predetermined intervals along the longitudinal direction of the long tube body.
- irrigation liquid is slowly supplied to the soil outside the drip irrigation tube (ie, drip irrigation) by discharging at a discharge rate.
- this drip irrigation tube By using this drip irrigation tube, not only can water and fertilizer be saved, but water can be supplied at a moderate supply rate. In addition, oxygen necessary for plant roots can be secured in the soil. Thereby, the growing state of the plant can be managed well.
- the drip irrigation tube incorporates a plurality of drip irrigation drippers corresponding to each discharge port for controlling the discharge amount of the irrigation liquid per unit time from each discharge port.
- the water flowing through the tube body is allowed to flow into the drip irrigation dripper through the inlet, and then the depressurization flow path (labyrinth) inside the drip irrigation dripper is circulated to reduce the pressure. After performing, it discharges from the discharge port connected to the downstream of the pressure-reduction channel.
- drip irrigation drippers are equipped with a so-called differential pressure control mechanism (pressure correction function).
- This kind of drip irrigation dripper is, for example, like a drip irrigation dripper (emitter unit) described in Patent Document 1, a film having elasticity like a diaphragm (for example, silicone rubber) and an inflow side member. It has a three-body structure that is sandwiched between members on the discharge side.
- this kind of drip irrigation dripper is for irrigation between the drip irrigation dripper installed on the upstream side (high pressure side) and the drip irrigation dripper installed on the downstream side (low pressure side) in the tube body.
- the drip irrigation dripper described in Patent Document 1 has high performance, it requires a large number of parts, and thus becomes large (particularly, high height).
- this drip irrigation dripper is arranged in the tube main body, the area occupancy ratio of the drip irrigation dripper with respect to the cross section of the flow path in the tube main body increases.
- the upstream drip irrigation dripper lies on the flow path, so that it passes through the upstream drip irrigation dripper and is discharged from the downstream drip irrigation dripper to the outside. It becomes a big obstacle for the liquid for use and obstructs the distribution, resulting in a large pressure loss.
- An object of the present invention is to provide a drip irrigation dripper capable of effectively reducing pressure loss and appropriately performing long-distance irrigation, and a drip irrigation apparatus provided with the drip irrigation dripper.
- the drip irrigation dripper is an ejection port for the irrigation liquid on the inner peripheral surface of a long flow pipe through which the irrigation liquid is circulated and penetrates the inner peripheral surface and the outer peripheral surface of the flow pipe.
- a drip irrigation dripper that performs drip irrigation by discharging the irrigation liquid from the discharge port, the bottom surface being joined to the inner peripheral surface of the flow pipe, and the opposite of the bottom surface
- An inflow that is formed in a plate shape elongated in the longitudinal direction of the flow pipe having an upper surface on the side and is arranged on the upper surface, and causes the irrigation liquid in the flow pipe to flow into the flow path of the drip irrigation dripper body
- a discharge for controlling the discharge amount of the irrigation liquid discharged from the discharge port through the flow path disposed at a downstream position on the flow path of the drip irrigation dripper body with respect to the inflow portion
- On the top surface with a quantity control unit A first groove portion that is recessed from one end in the longitudinal direction to the other end side in the longitudinal direction, and the groove width and depth of the
- first groove portion may be formed in a wedge shape.
- the first groove portion may be formed in a shape such that the groove depth gradually increases toward the center portion in the groove width direction.
- first groove portion may be formed in a shape such that a center line in the groove width direction has an inclination with respect to the longitudinal direction.
- a filter structure for suppressing entry of foreign matter into the flow path may be formed in the first groove portion.
- the upper surface further includes a second groove portion that is recessed from the other end in the longitudinal direction to one end side in the longitudinal direction, and the second groove portion has a groove width toward the one end side. Further, it may be formed in a shape such that the groove depth gradually decreases.
- the second groove may be formed in a wedge shape.
- the second groove portion may be formed in a shape such that the groove depth gradually increases toward the center portion in the groove width direction.
- the second groove portion may be formed in a shape such that a center line in the groove width direction has an inclination with respect to the longitudinal direction.
- the upper surface further includes a second groove portion that is recessed from the other end in the longitudinal direction to one end side in the longitudinal direction, and the second groove portion has a groove width toward the one end side.
- the groove depth may be gradually reduced, and the center line in the groove width direction may be formed in parallel to the center line of the first groove portion.
- a filter structure for suppressing entry of foreign matter into the flow path may be formed in the second groove portion.
- the drip irrigation apparatus according to the present invention is arranged at a position corresponding to a long circulation pipe for circulating the irrigation liquid and the discharge port of the irrigation liquid penetrating the inner peripheral surface and the outer peripheral surface of the flow pipe.
- the drip irrigation dripper according to the present invention is provided.
- the first groove portion may be disposed on the upstream side in the flow direction of the irrigation liquid in the flow pipe on the upper surface.
- the first groove portion can reduce the flow resistance of the drip irrigation dripper with respect to the irrigation liquid that circulates in the distribution pipe, thereby increasing the straightness of the irrigation liquid.
- the pressure loss can be reduced and long-distance irrigation can be performed appropriately.
- the straightness of the irrigation liquid can be further improved by optimizing the shape of the first groove. Further, since the flow of the irrigation liquid flowing on the first groove portion can be concentrated on the central side in the width direction and rectification can be performed along this central portion, the straightness of the irrigation liquid is further improved. be able to.
- the spiral groove of the irrigation liquid can be generated in the channel pipe by the first groove portion, a flow of the irrigation liquid that hardly receives resistance by the drip irrigation dripper is formed as much as possible. Can be more effectively mitigated. Moreover, the flushing effect of the filter structure by the irrigation liquid which distribute
- the flow of the irrigation liquid flowing on the second groove can be concentrated on the central side in the width direction and rectification can be performed along this central portion.
- the straightness of the liquid for use can be further improved.
- the spiral groove of the irrigation liquid can be generated in the channel pipe by the second groove portion, so that the irrigation liquid is less susceptible to resistance by the drip irrigation dripper as much as possible.
- the pressure loss can be more effectively mitigated.
- the spiral vortex flow can be maintained over a long distance, so that over a long distance Pressure loss can be effectively reduced.
- circulates on the 2nd groove part at high speed can be show
- the flow resistance of the drip irrigation dripper to the irrigation liquid flowing in the distribution pipe can be reduced and the straightness of the irrigation liquid can be increased, the pressure loss of the irrigation liquid can be reduced, Distance irrigation can be performed appropriately.
- the desired effect can be reliably achieved by appropriately functioning the first groove portion.
- pressure loss can be effectively reduced, and long-distance irrigation can be performed appropriately.
- FIG. 1 is a schematic overhead perspective view showing a drip irrigation dripper according to Embodiment 1 of the present invention.
- FIG. 2 is a plan view of the drip irrigation dripper shown in FIG.
- FIG. 3 is a schematic cross-sectional view showing a drip irrigation tube as the drip irrigation apparatus according to the first embodiment.
- FIG. 4 is a schematic overhead perspective view showing a drip irrigation dripper according to Embodiment 2 of the present invention.
- FIG. 5 is a plan view of the drip irrigation dripper shown in FIG.
- FIG. 6 is a schematic cross-sectional view of a drip irrigation tube of a drip irrigation dripper according to Embodiment 2 of the present invention.
- FIG. 7 is an explanatory diagram for explaining the operation and effect of the second embodiment.
- FIG. 1 is a schematic overhead perspective view showing a drip irrigation dripper according to Embodiment 1 of the present invention.
- FIG. 2 is a plan view of the drip irrigation dripper shown in FIG.
- FIG. 3 is a schematic cross-
- FIG. 8 is a schematic overhead perspective view showing a drip irrigation dripper according to Embodiment 3 of the present invention.
- FIG. 9 is a plan view of the drip irrigation dripper shown in FIG.
- FIG. 10 is an explanatory diagram for explaining the function and effect of the drip irrigation dripper according to the third embodiment.
- FIG. 11 is a schematic overhead perspective view showing a drip irrigation dripper according to a modification of the third embodiment.
- FIG. 12 is a plan view of the drip irrigation dripper shown in FIG.
- FIG. 13 is a perspective view showing the main part of another embodiment of the present invention.
- Embodiment 1 The drip irrigation dripper according to Embodiment 1 of the present invention will be described below with reference to FIGS.
- FIG. 1 is a schematic overhead perspective view of a drip irrigation dripper 1 according to Embodiment 1 of the present invention.
- FIG. 2 is a plan view of the drip irrigation dripper 1 shown in FIG.
- FIG. 3 is a schematic cross-sectional view showing the drip irrigation tube 2 as the drip irrigation apparatus according to the first embodiment.
- the drip irrigation tube 2 includes a long, substantially cylindrical tube body 3 as a distribution pipe for circulating the irrigation liquid, and a drip irrigation built in the tube body 3. And a dripper 1 for use.
- the drip irrigation dripper 1 is on the inner peripheral surface 31 of the tube main body 3 and passes through the inner peripheral surface 31 and the outer peripheral surface 32 of the tube main body 3. It arrange
- the drip irrigation dripper 1 controls the discharge amount of the irrigation liquid from the corresponding discharge port 33 per unit time.
- FIG. 3 for convenience, one drip irrigation dripper 1 and one discharge port 33 are shown. However, actually, a plurality of drip irrigation drippers 1 and a plurality of discharge ports 33 are arranged in the longitudinal direction of the tube body 3. They are arranged at predetermined intervals along the direction.
- the left side of the flow path in the tube body 3 is the upstream (water source) side, and the right side is the downstream side.
- the appearance of the drip irrigation dripper (drip irrigation dripper main body) 1 is formed in a substantially rectangular parallelepiped plate shape elongated in the longitudinal direction of the tube main body 3. .
- the drip irrigation dripper 1 has a rough outer shape by a bottom surface 11, a top surface 12 opposite to the bottom surface 11, and a side surface 13 connecting the bottom surface 11 and the top surface 12. It is composed.
- the materials of the drip irrigation dripper 1 and the tube body 3 are not particularly limited.
- the material of the drip irrigation dripper 1 is a resin such as polypropylene
- the material of the tube body 3 is a resin such as polyethylene having a lower melting point than that of the drip irrigation dripper 1.
- the manufacturing method of the tube main body 3 is not specifically limited.
- the tube body 3 can be formed by extrusion.
- the drip irrigation dripper 1 is joined to the inner peripheral surface 31 of the tube body 3 at the bottom surface 11.
- the drip irrigation dripper 1 formed by extrusion molding and the inner peripheral surface 31 of the tube body 3 are joined by placing the drip irrigation dripper 1 on the inner peripheral surface 31 of the tube body 3 before curing.
- the tube body 3 may be completed simultaneously with the curing.
- FIGS. 1 to 3 an inflow for allowing the irrigation liquid in the tube body 3 to flow into the channel 4 inside the drip irrigation dripper 1 on the upper surface 12 of the drip irrigation dripper 1.
- Part 5 is arranged.
- a discharge that controls the discharge amount of the irrigation liquid discharged from the discharge port 33 through the flow path 4 is positioned downstream of the inflow portion 5 on the flow path 4.
- a quantity control unit 6 is arranged.
- the flow path 4 may be constituted by the drip irrigation dripper 1 alone, or may be constituted by the drip irrigation dripper 1 and the inner peripheral surface 31 of the tube body 3.
- the inflow portion 5 has a single or a plurality of inflow ports formed on the upper surface 12 so as to communicate the outside of the drip irrigation dripper 1 (the flow path in the tube body 3) and the flow path 4. It may be provided.
- the discharge amount control unit 6 forms a decompression channel (a part of the channel 4) for allowing the irrigation liquid flowing from the inflow unit 5 to flow while reducing the pressure toward the discharge port 33. May have a part. Furthermore, the discharge amount control unit 6 is arranged so as to be exposed to the hydraulic pressure of the irrigation liquid, and the higher the hydraulic pressure, the larger the deformation to the discharge port 33 side, and the discharge port 33 or the flow immediately before the discharge port 33. You may have the diaphragm part formed so that the shielding amount of the path
- Patent Document 1 irrigation water is allowed to flow from the housing inlet (inflow part) into the restriction channel (decompression channel) to reduce the pressure, and the irrigated water after depressurization flows from the housing outlet toward the discharge port.
- a configuration is disclosed in which inflow and outflow control is performed by a membrane (diaphragm portion).
- Japanese Patent Application No. 2012-118551 prior to the present application discloses a drip irrigation dripper that has an inflow portion, a decompression flow path portion, and a diaphragm portion and is integrally formed of a resin material. Further, Japanese Patent Application No.
- 2012-216575 discloses a drip irrigation dripper that has an inflow control section (inflow section), a decompression flow path section, and a flow rate control section and is integrally formed of a resin material. These disclosed techniques may be adopted as means for embodying the flow path 4, the inflow part 5, and the discharge amount control part 6 of the drip irrigation dripper 1 of the present embodiment.
- the first groove 121 has a groove width (dimension in the X direction) and a groove depth (Z) as it goes to the other end side in the longitudinal direction of the upper surface 12. It is formed in a wedge shape (in other words, a triangular pyramid shape) such that the dimension in the direction is gradually reduced.
- the first groove 121 is formed such that the groove depth gradually increases toward the center in the groove width direction.
- the planar view shape (FIG. 2) of the 1st groove part 121 is an isosceles triangle shape.
- a filter structure 123 for suppressing entry of foreign matter into the flow path 4 is formed on the upper surface 12 including the first groove 121.
- the filter structure 123 has a plurality of convex portions 1231.
- the plurality of convex portions 1231 are long in the width direction (X direction) of the upper surface 12 and have a predetermined height (dimension in the Z direction).
- the plurality of convex portions 1231 are arranged at predetermined intervals in the longitudinal direction of the upper surface 12.
- the drip irrigation dripper 1 of the first embodiment a part of the irrigation liquid flowing in the tube body 3 flows into the flow path 4 of the drip irrigation dripper 1 from the inflow portion 5 to control the discharge amount.
- the discharge amount is controlled by the unit 6 and discharged from the discharge port 33 to the outside of the drip irrigation tube 2.
- the irrigation liquid that does not flow into the drip irrigation dripper 1 flows on the upper surface 12 of the drip irrigation dripper 1 and flows toward the downstream side of the tube body 3.
- the irrigation liquid passing over the first groove 121 effectively reduces the resistance of the drip irrigation dripper 1 against the irrigation liquid by the first groove 121.
- the flow is concentrated on the central portion side in the width direction of the first groove portion 121 and rectification is performed along the central portion, high straightness toward the downstream side of the tube body 3 can be exhibited. In other words, the pressure loss of the irrigation liquid by the drip irrigation dripper 1 is effectively mitigated by the first groove 121.
- the filter structure 123 on the first groove 121 can be flushed by the irrigation liquid. Therefore, the performance deterioration of the drip irrigation dripper 1 can be suppressed.
- the pressure loss may be further alleviated by forming a portion of the side surface 13 in a predetermined range on the upper surface 12 side on the curved surface 131.
- FIG. 4 is a schematic overhead perspective view showing a drip irrigation dripper according to Embodiment 2 of the present invention.
- FIG. 5 is a plan view of the drip irrigation dripper shown in FIG.
- FIG. 6 is a schematic cross-sectional view of a drip irrigation tube of a drip irrigation dripper according to Embodiment 2 of the present invention.
- the drip irrigation dripper 1 according to the second embodiment has a second recess formed on the upper surface 12 in addition to the configuration of the drip irrigation dripper 1 according to the first embodiment.
- a groove 122 is provided.
- the second groove 122 is formed from the other end (right end in FIG. 5) in the longitudinal direction (Y direction) of the upper surface 12 to one end in the longitudinal direction (left end in FIG. 5). ) Side.
- an end portion on one end side in the longitudinal direction of the second groove portion 122 is located on the other end side in the longitudinal direction with respect to a central portion in the longitudinal direction of the upper surface 12.
- the first groove 121 is formed from one end to the other end in the longitudinal direction of the upper surface 12 as in the first embodiment.
- the second groove 122 has a groove width (dimension in the X direction) and a groove depth (in the Z direction) toward the one end side in the longitudinal direction of the upper surface 12. It is formed in a wedge shape (in other words, a triangular pyramid shape) in which the dimension is gradually reduced.
- the second groove part 122 is formed in a shape such that the groove depth gradually increases toward the center part in the groove width direction.
- the center line in the groove width direction of the second groove part 122 (see the dashed line part in FIG. 5) is parallel to the longitudinal direction of the upper surface 12.
- the planar view shape (FIG. 5) of the 2nd groove part 122 is an isosceles triangle shape. Note that the shape of the second groove 122 may be the same as the shape of the first groove 121. As shown in FIG. 5, the center line of the second groove part 122 may be arranged on the same straight line as the center line of the first groove part 121 (dashed line straight part).
- the drip irrigation dripper 1 of the second embodiment As shown in FIG. 7, the drip irrigation dripper 1 is incorporated in the tube body 3 in the state reversed in the longitudinal direction from the configuration shown in FIG. Even in the case of (misassembled), the second groove 122 can exhibit a function of improving the straightness of the irrigation liquid instead of the first groove 121.
- the drip irrigation dripper 1 according to the second embodiment has a configuration capable of absorbing manufacturing errors, it is possible to improve manufacturing ease and yield.
- FIG. 8 is a schematic overhead perspective view showing a drip irrigation dripper according to Embodiment 3 of the present invention.
- FIG. 9 is a plan view of the drip irrigation dripper shown in FIG.
- FIG. 10 is an explanatory diagram for explaining the function and effect of the drip irrigation dripper according to the third embodiment.
- the difference between the drip irrigation dripper 1 according to the third embodiment and the drip irrigation dripper 1 according to the first embodiment is that the center line of the first groove 121 (see FIG. 9 (see the broken line portion 9) is a point having an inclination with respect to the longitudinal direction (Y direction) of the upper surface 12.
- the first groove 121 forms a flow of irrigation liquid inclined with respect to the longitudinal direction of the tube body 3, so that this flow is a spiral vortex. It can progress in the tube main body 3 toward the downstream side.
- Such a spiral vortex is less susceptible to resistance by the drip irrigation dripper 1 than the linear flow, and therefore the pressure loss can be more effectively reduced.
- each drip irrigation dripper 1 in the tube body 3 is provided with the same inclined first groove 121, the spiral vortex flow can be maintained and the pressure loss can be more effectively reduced. be able to.
- FIG. 11 is a schematic overhead perspective view showing a drip irrigation dripper according to a modification of the third embodiment.
- FIG. 12 is a plan view of the drip irrigation dripper shown in FIG.
- the configuration in the second embodiment can also be applied to the drip irrigation dripper 1 according to the second embodiment, as shown in FIGS. 11 and 12.
- the first groove 121 and the second groove 122 may be formed so that their center lines are parallel to each other.
- the spiral vortex can be maintained for a longer distance by the cooperation of the first groove 121 and the second groove 122 of the plurality of drip irrigation drippers in the tube main body 3. Loss can be more effectively reduced.
- the inflow portion 5 may be formed on the first groove portion 121 or the second groove portion 122.
- the filter structure 123 on the first groove 121 and the second groove 122 may be provided as necessary.
- FIG. 13 is a perspective view showing the main part of another embodiment of the present invention. As shown in FIG. 13, the first groove 121 and the second groove 122 may be formed in a substantially semiconical shape.
- the present invention it is possible to easily provide a dripper capable of dripping the liquid at an appropriate speed depending on the pressure of the liquid to be dripped. Therefore, the spread of the dripper to technical fields that require long-term dripping, such as drip irrigation and durability tests, and further development of the technical field are expected.
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Abstract
Description
以下、図1~図3を参照して、本発明の実施の形態1に係る点滴灌漑用ドリッパについて説明する。
図1は、本発明の実施の形態1に係る点滴灌漑用ドリッパ1の概略俯瞰斜視図である。図2は、図1に示す点滴灌漑用ドリッパ1の平面図である。図3は、実施の形態1に係る点滴灌漑装置としての点滴灌水チューブ2を示す概略断面図である。
また、図1~図3に示されるように、点滴灌漑用ドリッパ1の上面12上には、チューブ本体3内の灌漑用液体を点滴灌漑用ドリッパ1の内部の流路4内に流入させる流入部5が配置されている。さらに、図3に示されるように、流入部5に対して流路4上における下流側の位置には、流路4を経て吐出口33から吐出される灌漑用液体の吐出量を制御する吐出量制御部6が配置されている。
さらに、図1~図3に示されるように、上面12上には、上面12の長手方向(Y方向)における一端(図2における左端)から長手方向における他端(図2における右端)側に亘って、第1溝部121が凹入形成されている。ただし、上面12の長手方向における一端は、図3に示されるように、チューブ本体3内の灌漑用液体の流通方向における上流側の端部である。また、第1溝部121の長手方向における他端側の端部は、上面12の長手方向における中央部よりも長手方向における一端側に位置されている。
さらにまた、図1~図3に示されるように、第1溝部121を含む上面12上には、流路4内への異物の侵入を抑制するためのフィルタ構造123が形成されている。
実施の形態1の点滴灌漑用ドリッパ1によれば、チューブ本体3内を流通する灌漑用液体の一部は、流入部5から点滴灌漑用ドリッパ1の流路4内に流入し、吐出量制御部6によって吐出量を制御されて吐出口33から点滴灌水チューブ2の外部に吐出される。
次に、図4~図7を参照して、本発明の実施形態2に係る点滴灌漑用ドリッパ1ついて説明する。
図4は、本発明の実施の形態2に係る点滴灌漑用ドリッパを示す概略俯瞰斜視図である。図5は、図4に示す点滴灌漑用ドリッパの平面図である。図6は、本発明の実施の形態2に係る点滴灌漑用ドリッパの点滴灌水チューブの概略断面図である。
図4~図6に示されるように、実施の形態2における点滴灌漑用ドリッパ1は、実施の形態1の点滴灌漑用ドリッパ1の構成に加えて、上面12上に凹入形成された第2溝部122を有する。
実施の形態2の点滴灌漑用ドリッパ1によれば、仮に、図7に示すように、点滴灌漑用ドリッパ1を図6に示した構成と長手方向において逆転した状態でチューブ本体3内に組み込んだ(誤組した)場合においても、第1溝部121に替わって、第2溝部122が、灌漑用液体の直進性を高める機能を発揮することができる。
次に、図8~図10を参照して、本発明の実施の形態3に係る点滴灌漑用ドリッパ1について説明する。
図8は、本発明の実施の形態3に係る点滴灌漑用ドリッパを示す概略俯瞰斜視図である。図9は、図8に示す点滴灌漑用ドリッパの平面図である。図10は、実施の形態3に係る点滴灌漑用ドリッパの作用および効果を説明するための説明図である。
本実施形態によれば、図10に示されるように、第1溝部121が、チューブ本体3の長手方向に対して傾斜した灌漑用液体の流れを形成することによって、この流れが、螺旋渦流となってチューブ本体3内を下流側に向かって進行することができる。このような螺旋渦流は、直線流に比べて点滴灌漑用ドリッパ1による抵抗を受け難いので、圧力損失を更に有効に緩和することができる。
図11は、実施の形態3の変形例に係る点滴灌漑用ドリッパを示す概略俯瞰斜視図である。図12は、図11に示す点滴灌漑用ドリッパの平面図である。
3 チューブ本体
4 流路
5 流入部
6 吐出量制御部
11 底面
12 上面
31 内周面
33 吐出口
121 第1溝部
122 第2溝部
Claims (13)
- 灌漑用液体を流通させる長尺な流通管の内周面上であって、前記流通管の内周面と外周面とを貫通する前記灌漑用液体の吐出口に対応する位置に配置され、前記吐出口から前記灌漑用液体を吐出させることにより点滴灌漑を行う点滴灌漑用ドリッパであって、
前記流通管の内周面に接合される底面および前記底面と反対側の上面を有する前記流通管の長手方向に長尺な板状に形成され、
前記上面上に配置され、前記流通管内の前記灌漑用液体を点滴灌漑用ドリッパ本体の流路内に流入させる流入部と、
前記流入部に対して前記点滴灌漑用ドリッパ本体の流路上における下流側の位置に配置され、前記流路を経て前記吐出口から吐出される前記灌漑用液体の吐出量を制御する吐出量制御部と、
前記上面上に、前記長手方向における一端から前記長手方向における他端側に亘って凹入形成された第1溝部と
を備え、
前記第1溝部は、前記他端側に向かうにしたがって溝幅および溝深さが漸減するような形状に形成されている、
点滴灌漑用ドリッパ。 - 前記第1溝部は、楔形状に形成されている、請求項1に記載の点滴灌漑用ドリッパ。
- 前記第1溝部は、溝幅方向における中央部に向かうにしたがって溝深さが漸増するような形状に形成されている、請求項2に記載の点滴灌漑用ドリッパ。
- 前記第1溝部は、溝幅方向における中心線が、前記長手方向に対して傾きを有するような形状に形成されている、請求項3に記載の点滴灌漑用ドリッパ。
- 前記第1溝部に、前記流路内への異物の侵入を抑制するためのフィルタ構造が形成されている、請求項1に記載の点滴灌漑用ドリッパ。
- 前記上面上に、前記長手方向における他端から前記長手方向における一端側に亘って凹入形成された第2溝部をさらに備え、
前記第2溝部は、前記一端側に向かうにしたがって溝幅および溝深さが漸減するような形状に形成されている、
請求項1~5のいずれか一項に記載の点滴灌漑用ドリッパ。 - 前記第2溝部は、楔形状に形成されている、請求項6に記載の点滴灌漑用ドリッパ。
- 前記第2溝部は、溝幅方向における中央部に向かうにしたがって溝深さが漸増するような形状に形成されている、請求項7に記載の点滴灌漑用ドリッパ。
- 前記第2溝部は、溝幅方向における中心線が、前記長手方向に対して傾きを有するような形状に形成されている、請求項8に記載の点滴灌漑用ドリッパ。
- 前記上面上に、前記長手方向における他端から前記長手方向における一端側に亘って凹入形成された第2溝部をさらに備え、
前記第2溝部は、前記一端側に向かうにしたがって溝幅および溝深さが漸減するように形成されているとともに、溝幅方向における中心線が、前記第1溝部の中心線に平行に形成されている、
請求項4に記載の点滴灌漑用ドリッパ。 - 前記第2溝部に、前記流路内への異物の侵入を抑制するためのフィルタ構造が形成されている、請求項6に記載の点滴灌漑用ドリッパ。
- 灌漑用液体を流通させる長尺な流通管と、
前記流通管の内周面と外周面とを貫通する前記灌漑用液体の吐出口に対応する位置に配置された、請求項1~11のいずれか一項に記載の点滴灌漑用ドリッパと
を備える、
点滴灌漑装置。 - 前記点滴灌漑用ドリッパは、請求項1~5のいずれか一項に記載の点滴灌漑用ドリッパであり、
前記第1溝部は、前記上面上における前記流通管内の灌漑用液体の流通方向の上流端側に配置されている、
請求項12に記載の点滴灌漑装置。
Priority Applications (6)
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JP2014552945A JP6251186B2 (ja) | 2012-12-20 | 2013-12-19 | 点滴灌漑用ドリッパおよびこれを備えた点滴灌漑装置 |
CN201380065361.8A CN104853593B (zh) | 2012-12-20 | 2013-12-19 | 滴灌用滴头以及具备该滴灌用滴头的滴灌装置 |
US14/653,358 US9883639B2 (en) | 2012-12-20 | 2013-12-19 | Drip-irrigation emitter and drip-irrigation device provided therewith |
EP13864026.3A EP2936974B1 (en) | 2012-12-20 | 2013-12-19 | Drip-irrigation emitter and drip-irrigation device provided therewith |
ES13864026.3T ES2672197T3 (es) | 2012-12-20 | 2013-12-19 | Emisor de riego por goteo y dispositivo de riego por goteo dotado del mismo |
IL239547A IL239547B (en) | 2012-12-20 | 2015-06-18 | An exhaust component for drip irrigation and a drip irrigation device that includes this exhaust component |
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JP2012278353 | 2012-12-20 | ||
JP2012-278353 | 2012-12-20 |
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US (1) | US9883639B2 (ja) |
EP (1) | EP2936974B1 (ja) |
JP (1) | JP6251186B2 (ja) |
CN (1) | CN104853593B (ja) |
ES (1) | ES2672197T3 (ja) |
IL (1) | IL239547B (ja) |
WO (1) | WO2014097638A1 (ja) |
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WO2016136695A1 (ja) * | 2015-02-25 | 2016-09-01 | 株式会社エンプラス | エミッタおよび点滴灌漑用チューブ |
CN109429662A (zh) * | 2018-11-27 | 2019-03-08 | 长安大学 | 一种具有水肥耦合功能的滴灌系统 |
WO2019059186A1 (ja) * | 2017-09-21 | 2019-03-28 | 株式会社エンプラス | エミッタおよび点滴灌漑用チューブ |
US10362740B2 (en) | 2015-02-25 | 2019-07-30 | Enplas Corporation | Emitter and drip irrigation tube |
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JP6639212B2 (ja) * | 2015-12-09 | 2020-02-05 | 株式会社エンプラス | エミッタおよび点滴灌漑用チューブ |
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Also Published As
Publication number | Publication date |
---|---|
US9883639B2 (en) | 2018-02-06 |
EP2936974A4 (en) | 2016-07-13 |
EP2936974A1 (en) | 2015-10-28 |
IL239547B (en) | 2020-08-31 |
US20160183482A1 (en) | 2016-06-30 |
ES2672197T3 (es) | 2018-06-13 |
JPWO2014097638A1 (ja) | 2017-01-12 |
EP2936974B1 (en) | 2018-04-11 |
CN104853593B (zh) | 2017-05-17 |
CN104853593A (zh) | 2015-08-19 |
JP6251186B2 (ja) | 2017-12-20 |
IL239547A0 (en) | 2015-08-31 |
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