WO2021045032A1 - Goutteur et tube d'irrigation goutte à goutte - Google Patents

Goutteur et tube d'irrigation goutte à goutte Download PDF

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Publication number
WO2021045032A1
WO2021045032A1 PCT/JP2020/033001 JP2020033001W WO2021045032A1 WO 2021045032 A1 WO2021045032 A1 WO 2021045032A1 JP 2020033001 W JP2020033001 W JP 2020033001W WO 2021045032 A1 WO2021045032 A1 WO 2021045032A1
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Prior art keywords
flow path
emitter
irrigation liquid
hole
tube
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PCT/JP2020/033001
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English (en)
Japanese (ja)
Inventor
好貴 小野
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株式会社エンプラス
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Publication of WO2021045032A1 publication Critical patent/WO2021045032A1/fr

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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
    • 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
    • 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 an emitter and a drip irrigation tube having the emitter.
  • the drip irrigation method has been known as one of the plant cultivation methods.
  • the drip irrigation method is a method in which a drip irrigation tube is placed on the soil in which a plant is planted, and an irrigation liquid such as water or liquid fertilizer is dropped from the drip irrigation tube to the soil.
  • an irrigation liquid such as water or liquid fertilizer is dropped from the drip irrigation tube to the soil.
  • the drip irrigation method has attracted particular attention because it can minimize the consumption of irrigation liquid.
  • a drip irrigation tube usually has a tube having a plurality of through holes for discharging the irrigation liquid and a plurality of emitters (also referred to as “drippers") for discharging the irrigation liquid from each through hole. .. Further, as the type of the emitter, an emitter used by joining to the inner wall surface of the tube (see, for example, Patent Document 1) and an emitter used by piercing the tube from the outside are known.
  • FIG. 1 is a perspective view showing the configuration of an emitter 1 used by joining to the inner surface of a conduit, which is described in Patent Document 1.
  • the emitter 1 includes an intake port 3 for taking in the irrigation liquid, a discharge port 4 for discharging the irrigation liquid, and a flow path 2 connecting them.
  • the flow path 2 has a plurality of convex portions 5 that alternately project from both sides of the side surface of the flow path 2 in the flow direction of the irrigation liquid.
  • the emitter 1 is made of a plastic material.
  • the emitter 1 described in Patent Document 1 is used in a state where the surface on which the flow path 2 is formed is joined to the inner surface of the tube.
  • the drip irrigation tube using the emitter 1 described in Patent Document 1 can supply the irrigation liquid at a desired flow rate, and foreign matter such as sand grains and precipitates accumulates in the flow path 2 and becomes clogged. It is said that it can suppress irrigation.
  • the present invention has been made in view of this point, and an object of the present invention is to provide an emitter and a drip irrigation tube capable of suppressing the accumulation of foreign matter in the flow path.
  • the irrigation liquid in the tube is discharged to the discharge port.
  • It is an emitter for quantitatively discharging from the tube to the outside of the tube, and is arranged so as to face the discharge port and a water intake portion including a first through hole for taking in the irrigation liquid. It has a discharge part for discharging the liquid, a flow path for connecting the water intake part and the discharge part, and a flow path for flowing the irrigation liquid, and the flow path is taken in from the first through hole.
  • the emitter further has a second through hole that opens to the outside and the decompression flow path, and the irrigation flowing through the decompression flow path.
  • the flow direction of the liquid for irrigation and the flow direction of the liquid for irrigation flowing into the decompression flow path from the second through hole are non-parallel.
  • the drip irrigation tube of the present invention comprises a tube having a discharge port for discharging an irrigation liquid and an emitter according to the present invention joined at a position corresponding to the discharge port on the inner wall surface of the tube.
  • an emitter and a drip irrigation tube capable of suppressing the accumulation of foreign matter in the flow path.
  • FIG. 1 is a diagram showing a configuration of a conventional emitter.
  • FIG. 2 is a diagram showing a configuration of a drip irrigation tube according to the first embodiment.
  • 3A to 3C are diagrams showing the configuration of the emitter according to the first embodiment.
  • FIG. 4 is a cross-sectional view of the emitter according to the first embodiment.
  • FIG. 5 is a cross-sectional view of the emitter according to the first embodiment.
  • FIG. 6 is a diagram showing a configuration of a drip irrigation tube according to the second embodiment.
  • 7A to 7C are diagrams showing the configuration of the emitter according to the second embodiment.
  • FIG. 8 is a partially enlarged perspective view of the decompression flow path of the emitter according to the second embodiment.
  • 9A and 9B are cross-sectional views of the emitter according to the second embodiment.
  • 10A to 10C are partially enlarged views of the decompression flow path of the emitter according to the modified example.
  • 11A and 11B are partially enlarged views of the decompression flow path of the emitter according to the modified example.
  • FIG. 2 is a cross-sectional view of the drip irrigation tube 100 according to the first embodiment in the major axis direction. As shown in FIG. 2, the drip irrigation tube 100 has a tube 110 and an emitter 120.
  • the tube 110 is a pipe for flowing an irrigation liquid.
  • the material of the tube 110 is not particularly limited.
  • the material of the tube 110 is polyethylene.
  • a plurality of discharge ports 112 for discharging the irrigation liquid at predetermined intervals (for example, 200 to 500 mm) in the axial direction of the tube 110 are formed on the tube wall of the tube 110.
  • the diameter of the opening of the discharge port 112 is not particularly limited as long as the irrigation liquid can be discharged. In the present embodiment, the diameter of the opening of the discharge port 112 is 1.5 mm.
  • Emitters 120 (described later) are joined to positions corresponding to discharge ports 112 on the inner wall surface of the tube 110.
  • the cross-sectional shape and cross-sectional area perpendicular to the axial direction of the tube 110 are not particularly limited as long as the emitter 120 can be arranged inside the tube 110.
  • FIG. 3A is a plan view of the emitter 120 according to the first embodiment
  • FIG. 3B is a bottom view of the emitter 120
  • FIG. 3C is a right side view of the emitter 120.
  • FIG. 4 is a cross-sectional view taken along the line AA shown in FIG. 3A.
  • FIG. 5 is a cross-sectional view taken along the line BB shown in FIG. 3A.
  • the emitter 120 is joined to the inner wall surface of the tube 110 through which the irrigation liquid is circulated, at a position corresponding to the discharge port 112 communicating with the inside and outside of the tube 110 (see FIG. 2). As shown in FIGS. 3A and 3B, the emitter 120 is arranged facing the water intake 130 including the first through hole 131 for taking in the irrigation liquid and the discharge port 112 of the drip irrigation tube 100. It has a discharge unit 140 for discharging the irrigation liquid, and a flow path 150 for connecting the water intake unit 130 and the discharge unit 140 and circulating the irrigation liquid taken in from the water intake unit 130 to the discharge unit 140.
  • the flow path 150 is a decompression flow path 151 for reducing the pressure of the irrigation liquid taken in from the first through hole 131, and a flow rate for adjusting the flow rate of the irrigation liquid decompressed in the decompression flow path 151. It has a reduction portion 160 and. Further, the emitter 120 further has a second through hole 152 that opens to the outside and the decompression flow path 151.
  • the “outside” means a space outside the emitter 120, and when the emitter 120 is joined to the inner wall surface of the tube 110, it means a space inside the tube 110 through which the irrigation liquid flows.
  • the emitter 120 is manufactured by accommodating the inner member 124 in the accommodating portion of the emitter main body 123.
  • the emitter body 123 includes a water intake unit 130 and a part of the flow path 150 (mainly the decompression flow path 151).
  • the inner member 124 includes a discharge portion 140 and a part of the flow path 150.
  • the flow rate reducing portion 160 is composed of a flow rate reducing recess 161 and a diaphragm 162 (described later) of the emitter body 123, a pedestal 163, a flow rate reducing through hole 164, and a connecting groove 165 of the inner member 124.
  • the water intake unit 130 is arranged on the surface 121 of the emitter 120 along the major axis direction.
  • the water intake unit 130 has a plurality of first through holes 131 and a water intake side screen unit 132. Further, in the present embodiment, the opening 153 of the second through hole 152 is also arranged in the water intake portion 130 (water intake side screen portion 132).
  • the first through hole 131 is formed on the bottom surface of the water intake recess 133.
  • the shape and number of the first through holes 131 are not particularly limited as long as the irrigation liquid taken into the water intake recess 133 can be taken into the emitter 120.
  • the first through hole 131 is two elongated holes formed on the bottom surface of the water intake recess 133 along the major axis direction of the emitter 120. Since each elongated hole is partially covered by a plurality of ridges 134, the first through hole 131 appears to be divided into a large number of through holes when viewed from the front side (see FIG. 3B). ).
  • the water intake side screen portion 132 prevents foreign matter in the irrigation liquid taken into the emitter 120 from entering the water intake recess 133.
  • the water intake side screen portion 132 is open to the inside of the tube 110 and has a water intake recess 133 and a plurality of ridges 134.
  • the water intake recess 133 is a recess formed on the surface 121 of the emitter.
  • the depth of the water intake recess 133 is not particularly limited, and is appropriately set depending on the size of the emitter 120.
  • a plurality of ridges 134 are formed on the bottom surface of the water intake recess 133, and a first through hole 131 is formed on the bottom surface of the water intake recess 133. Further, an opening 153 of the second through hole 152 is arranged on the bottom surface of the water intake recess 133 (see FIGS. 3A and 4).
  • the size of the opening 153 of the second through hole 152 arranged in the water intake recess 133 is particularly limited as long as the irrigation liquid can be taken in to the extent that foreign matter accumulated in the decompression flow path 151 can be removed. Not done. Further, the number and shape of the openings 153 of the second through hole 152 are also not particularly limited.
  • the plurality of ridges 134 are arranged on the bottom surface of the water intake recess 133.
  • the arrangement and number of the ridges 134 are not particularly limited as long as the water intake unit 130 can take in the irrigation liquid from the opening side of the water intake recess 133 and prevent foreign matter from entering the irrigation liquid.
  • the plurality of ridges 134 are arranged so that the long axis direction of the ridges 134 is along the short axis direction of the emitter 120.
  • the distance between the adjacent ridges 134 is not particularly limited as long as the above-mentioned function can be exhibited. Further, in FIG. 3A, as seen in the center of the water intake portion 130, the plurality of ridges 134 may be fused with each other.
  • the irrigation liquid that has flowed through the tube 110 is mainly taken into the emitter 120 from the first through hole 131 while the water intake side screen portion 132 prevents foreign matter from entering the water intake recess 133.
  • the irrigation liquid taken in from the first through hole 131 of the water intake unit 130 is guided to the decompression flow path 151.
  • the decompression flow path 151 reduces the pressure of the irrigation liquid taken in from the first through hole 131.
  • the decompression flow path 151 has a plurality of protrusions for reducing the pressure of the irrigation liquid.
  • the number and shape of the plurality of protrusions arranged in the decompression flow path 151 are not particularly limited as long as the pressure of the irrigation liquid taken in from the first through hole 131 can be reduced.
  • the decompression flow path 151 has a plurality of convex portions 155 that alternately project from two side surfaces 154 facing each other in the flow direction of the irrigation liquid (indicated by an arrow in FIG. 3B).
  • the opening 156 of the second through hole 152 is arranged in the decompression flow path 151 (see FIGS. 3B and 4).
  • the decompression flow path 151 is formed on the back surface 122 of the emitter 120 along the major axis direction of the emitter 120.
  • a flow rate reducing unit 160 is connected to the downstream end of the decompression flow path 151.
  • the decompression flow path 151 is formed by joining the back surface 122 of the emitter and the inner wall surface of the tube 110. The irrigation liquid taken in from the water intake unit 130 flows to the flow rate reduction unit 160 through the decompression flow path 151.
  • the decompression flow path 151 has two side surfaces 154 facing each other and a bottom surface.
  • the "bottom surface of the decompression flow path 151" means a surface different from the two side surfaces 154 and facing the inner wall surface of the tube 110 when the emitter 120 is joined to the inner wall surface of the tube 110. ..
  • the two side surfaces 154 facing each other have a plurality of convex portions 155, respectively.
  • the convex portion 155 arranged on the side surface of one side surface 154 and the convex portion 155 arranged on the other side surface 154 indicate the flow direction of the irrigation liquid in the decompression flow path 151 (indicated by an arrow in FIG. 3B). ) Are alternately arranged (see FIG. 3B).
  • the shape of the convex portion 155 is not particularly limited, and may be a substantially square columnar shape or a substantially triangular columnar shape. From the viewpoint of making it difficult for foreign matter to be deposited in the decompression flow path 151, the shape of the convex portion 155 is preferably a substantially triangular columnar shape. Further, from the viewpoint of making it difficult for foreign matter to be deposited in the decompression flow path 151, the convex portion 155 is arranged so that its tip does not exceed the center line L of the decompression flow path 151 when viewed in a plan view. Is preferable (see FIG. 3B).
  • the opening 156 of the second through hole 152 is arranged in the decompression flow path 151.
  • the flow direction of the irrigation liquid flowing through the decompression flow path 151 is not parallel to the flow direction of the irrigation liquid flowing from the second through hole 152 into the decompression flow path 151.
  • the opening 156 of the second through hole 152 is arranged on the bottom surface of the decompression flow path 151.
  • the position of the opening 156 of the second through hole 152 is not particularly limited, but is preferably between two adjacent convex portions 155 protruding from one side surface 154 of the two side surface 154.
  • the opening 156 of the second through hole 152 is located between two convex portions 155 protruding from one side surface 154 in the flow direction of the irrigation liquid, and the other side surface of the two side surface 154. It is more preferable that the irrigation liquid is arranged on the upstream side in the flow direction of the irrigation liquid rather than the convex portion 155 protruding from the irrigation liquid.
  • the irrigation liquid taken in from the opening 153 on the intake portion 130 side of the second through hole 152 is guided to the opening 156 through the second through hole 152 (see FIGS. 3B and 4).
  • the flow rate reducing unit 160 is connected to the downstream end of the decompression flow path 151, and sends the irrigation liquid to the discharge unit 140 while reducing the flow rate of the irrigation liquid according to the pressure of the irrigation liquid in the tube 110. ..
  • the configuration of the flow rate reducing unit 160 is not particularly limited as long as it can exhibit the above-mentioned functions.
  • the flow rate reducing portion 160 includes a flow rate reducing recess 161, a diaphragm 162, a pedestal 163, a flow rate reducing through hole 164, a connecting groove 165, and a pedestal support portion. It has 166 and.
  • the flow rate reducing recess 161 and the diaphragm 162 are provided in the emitter body 123, and the pedestal 163, the flow rate reducing through hole 164, the connecting groove 165, and the pedestal support portion 166 are provided in the inner member 124.
  • the diaphragm 162 and the pedestal 163 face each other, and the flow rate reducing portion 160 is configured.
  • the flow rate of the irrigation liquid is controlled by deforming the diaphragm 162 according to the pressure of the irrigation liquid in the tube 110.
  • the flow rate reduction recess 161 is a recess connected to the downstream end of the decompression flow path 151.
  • a diaphragm 162 is arranged between the flow rate reducing recess 161 and the space inside the tube 110. Therefore, the irrigation liquid that has flowed into the flow rate reducing recess 161 does not flow out into the tube 110.
  • the pedestal 163 is arranged so as to face the diaphragm 162.
  • the flow rate reduction through hole 164 has an opening in the pedestal 163, and is provided so as to communicate the flow rate reduction recess 161 and the discharge portion 140.
  • the diaphragm 162 is arranged so as not to contact the pedestal 163 when the pressure in the tube 110 is low, and to bend and contact the pedestal 163 when the pressure in the tube 110 is high.
  • the opening on the pedestal 163 side of the flow rate reducing through hole 164 is arranged at a position where the diaphragm 162 is closed when it comes into contact with the pedestal 163.
  • the connecting groove 165 is formed in the pedestal 163 so that the irrigation liquid in the flow rate reducing recess 161 can flow into the flow rate reducing through hole 164 even if the diaphragm 162 closes the opening of the flow rate reducing through hole 164. It is a groove that has been made.
  • the pedestal support portion 166 is arranged on the back side of the pedestal 163 and comes into contact with the inner wall surface of the tube 110 when the emitter 120 is joined to the inner wall surface of the tube 110.
  • the pedestal support portion 166 supports the pedestal 163 so that the pedestal 163 does not bend even if the diaphragm 162 presses the pedestal 163.
  • the discharge portion 140 is a recess arranged on the back surface 122 of the emitter 120, and is connected to the downstream end of the flow rate reduction portion 160.
  • the emitter 120 is joined to the inner wall surface of the tube 110 so that the discharge portion 140 faces the discharge port 112 of the tube 110 (see FIG. 2).
  • the discharge unit 140 sends the irrigation liquid whose flow rate is controlled by the flow rate reduction unit 160 to the discharge port 112 of the tube 110.
  • the configuration of the discharge unit 140 is not particularly limited as long as it can exhibit the above-mentioned functions.
  • the plan-view shape of the discharge unit 140 is not particularly limited, and is, for example, a substantially rectangular shape.
  • the emitter 120 may be made of a flexible material or a non-flexible material. Since the diaphragm 162 is preferably flexible, the emitter body 123 including the diaphragm 162 is preferably made of a flexible material. Examples of materials constituting the emitter 120 include high-density polyethylene, polypropylene, polystyrene, polyacetal and the like. In this embodiment, the material constituting the emitter 120 is, for example, high density polyethylene.
  • the irrigation liquid is sent into the tube 110.
  • irrigation liquids include water, liquid fertilizers, pesticides and mixtures thereof.
  • the pressure of the irrigation liquid sent to the drip irrigation tube 100 is preferably 0.1 MPa or less so that the drip irrigation method can be easily introduced and the tube 110 and the emitter 120 are prevented from being damaged. ..
  • the irrigation liquid in the tube 110 is taken into the emitter 120 from the water intake 130. Specifically, the irrigation liquid in the tube 110 enters the water intake recess 133 through the gap between the adjacent protrusions 134 and passes through the first through hole 131. At this time, since the water intake unit 130 has a water intake side screen unit 132 (gap between adjacent ridges 134), foreign matter in the irrigation liquid can be removed to some extent.
  • the irrigation liquid taken in from the water intake unit 130 reaches the flow rate reduction unit 160 after being decompressed in the decompression flow path 151. Further, the irrigation liquid taken in from the opening 153 on the intake portion 130 side of the second through hole 152 flows into the decompression flow path 151 through the second through hole 152. As a result, clogging due to foreign matter in the decompression flow path 151 can be suppressed.
  • the flow rate of the irrigation liquid is controlled by deforming the diaphragm 162 and changing the distance between the diaphragm 162 and the pedestal 163 according to the pressure of the irrigation liquid in the tube 110.
  • the irrigation liquid that has flowed from the flow rate reducing unit 160 into the discharge unit 140 is discharged from the discharge port 112 of the tube 110 to the outside of the tube 110.
  • the irrigation liquid flows directly from the second through hole 152 into the decompression flow path 151, so that the flow of the irrigation liquid in the decompression flow path 151 becomes complicated. , It is possible to suppress the accumulation of foreign matter in the decompression flow path 151 (particularly, the region between the two convex portions 155 where foreign matter is likely to accumulate). Therefore, the emitter 120 according to the present embodiment can be used for a long period of time without flushing by flowing a high-pressure water stream through the decompression flow path 151.
  • the irrigation liquid is taken into the emitter 120 not only from the first through hole 131 but also from the second through hole 152, the number and size of the first through holes 131 are increased. It can also be made smaller.
  • the opening 153 on the outer side of the second through hole 152 is arranged in the water intake portion 130
  • the position of the opening 153 of the second through hole 152 is determined.
  • the opening 153 of the second through hole 152 may be arranged in a region other than the intake portion 130 of the front surface 121 of the emitter 120, or on the side surface of the emitter 120 (a surface other than the front surface 121 and the back surface 122). It may be arranged.
  • the emitter 200 according to the second embodiment is different from the emitter 120 according to the first embodiment only in the position of the second through hole 210 that opens to the outside and the decompression flow path 151. Therefore, the same configuration as that of the emitter 120 according to the first embodiment is designated by the same reference numerals, and the description thereof will be omitted.
  • FIG. 6 is a cross-sectional view of the drip irrigation tube 100 according to the second embodiment in the major axis direction. As shown in FIG. 6, the drip irrigation tube 100 has a tube 110 and an emitter 200.
  • FIG. 7A is a plan view of the emitter 200 according to the present embodiment
  • FIG. 7B is a bottom view of the emitter 200
  • FIG. 7C is a right side view of the emitter 200.
  • FIG. 8 is a partially enlarged perspective view of the decompression flow path 151.
  • 9A is a cross-sectional view taken along the line CC of FIG. 7A
  • FIG. 9B is a cross-sectional view taken along the line DD of FIG. 7A.
  • the emitter 200 is joined to the inner wall surface of the tube 110 through which the irrigation liquid is circulated, at a position corresponding to the discharge port 112 communicating with the inside and outside of the tube 110 (see FIG. 6). As shown in FIGS. 7A and 7B, the emitter 200 is arranged to face the water intake 130 including the first through hole 131 for taking in the irrigation liquid and the discharge port 112 of the drip irrigation tube 100. It has a discharge unit 140 for discharging the irrigation liquid, and a flow path 150 for connecting the water intake unit 130 and the discharge unit 140 and circulating the irrigation liquid taken in from the water intake unit 130 to the discharge unit 140.
  • the flow path 150 is a decompression flow path 151 for reducing the pressure of the irrigation liquid taken in from the first through hole 131, and a flow rate for adjusting the flow rate of the irrigation liquid decompressed in the decompression flow path 151. It has a reduction portion 160 and. Further, the emitter 200 further has a second through hole 210 that opens to the outside and the decompression flow path 151.
  • the emitter 200 is also manufactured by accommodating the inner member 124 in the accommodating portion of the emitter main body 123.
  • the emitter body 123 includes a water intake unit 130 and a part of the flow path 150 (mainly the decompression flow path 151).
  • the inner member 124 includes a discharge portion 140 and a part of the flow path 150.
  • the flow rate reducing portion 160 is composed of a flow rate reducing recess 161 and a diaphragm 162 (described later) of the emitter body 123, a pedestal 163, a flow rate reducing through hole 164, and a connecting groove 165 of the inner member 124.
  • the water intake unit 130 is arranged on the surface 220 of the emitter 200 along the major axis direction.
  • the water intake unit 130 has a plurality of first through holes 131 and a water intake side screen unit 132. Further, in the present embodiment, the opening portion 211 of the second through hole 210 is also arranged in the water intake portion 130 (water intake side screen portion 132).
  • the size of the opening 211 of the second through hole 210 is not particularly limited as long as the irrigation liquid can be taken in to the extent that foreign matter accumulated in the decompression flow path 151 can be removed. Further, the number and shape of the openings 211 of the second through hole 210 are also not particularly limited.
  • the decompression flow path 151 has a plurality of convex portions 155 that alternately project from two side surfaces facing each other in the flow direction of the irrigation liquid (indicated by an arrow in FIG. 7B), and is formed from the first through hole 131. Reduce the pressure of the irrigation liquid taken in.
  • the opening 212 of the second through hole 210 is arranged in the decompression flow path 151 (see FIGS. 8, 9A and 9B).
  • the decompression flow path 151 is formed on the back surface 230 of the emitter 200 along the major axis direction of the emitter 200.
  • a flow rate reducing unit 160 is connected to the downstream end of the decompression flow path 151.
  • the decompression flow path 151 is formed by joining the back surface 230 of the emitter and the inner wall surface of the tube 110. The irrigation liquid taken in from the water intake unit 130 flows to the flow rate reduction unit 160 through the decompression flow path 151.
  • the decompression flow path 151 has two side surfaces 154 facing each other and a bottom surface.
  • the two side surfaces 154 facing each other have a plurality of convex portions 155, respectively.
  • the convex portion 155 arranged on one side surface 154 and the convex portion 155 arranged on the other side surface 154 are in the flow direction of the irrigation liquid in the decompression flow path 151 (indicated by an arrow in FIG. 7B). They are arranged alternately (see FIG. 7B).
  • the opening 212 of the second through hole 210 is arranged in the decompression flow path 151.
  • the flow direction of the irrigation liquid flowing through the decompression flow path 151 is not parallel to the flow direction of the irrigation liquid flowing from the second through hole 210 into the decompression flow path 151.
  • the opening 212 of the second through hole 210 is arranged on the surface of the convex portion 155.
  • the position of the opening 212 of the second through hole 210 is not particularly limited, but is preferably between two adjacent convex portions 155 protruding from one side surface 154 of the two side surfaces 154.
  • the opening 212 of the second through hole 210 is located between two convex portions 155 protruding from one side surface 154 in the flow direction of the irrigation liquid, and the other side surface of the two side surface 154. It is more preferable that the irrigation liquid is arranged on the upstream side in the flow direction of the irrigation liquid rather than the convex portion 155 protruding from the irrigation liquid. That is, as shown in FIG. 8, it is preferable that the opening 212 of the second through hole 210 is arranged on the surface of the convex portion 155 facing the downstream side.
  • the opening 212 of the second through hole 210 is arranged in the vicinity of the base end portion of the convex portion 155 on the surface of the convex portion 155.
  • the irrigation liquid taken in from the opening 211 on the intake portion 130 side of the second through hole 210 is guided to the opening 212 through the second through hole 210 (see FIG. 9B).
  • the emitter 200 according to the present embodiment also has the same effect as the emitter 100 according to the first embodiment.
  • the emitters 120 and 200 having the decompression flow path 151 having a plurality of convex portions 155 alternately protruding from the two side surfaces 154 facing each other have been described, but the emitter according to the present invention includes the emitters 120 and 200.
  • the configuration of the decompression flow path 151 is not particularly limited as long as the pressure of the irrigation liquid taken in from the first through hole 131 can be depressurized.
  • FIGS. 11A and 11B are diagrams showing a modified example of the decompression flow path 151.
  • 10A and 10B are partially enlarged bottom views of the decompression flow path 151 of the emitter according to the modified example, and FIG.
  • 10C is a partially enlarged cross section of the decompression flow path 151 of the emitter according to the modified example of FIG. 10B. It is a figure. 11A and 11B are partially enlarged bottom views of the decompression flow path 151 of the emitter according to the modified example.
  • the decompression flow path 151 may have a plurality of columnar convex portions 155 protruding from the bottom surface 157 toward the inner wall surface of the tube 110.
  • a plurality of prismatic convex portions 155 may be provided so as to project from the bottom surface 157 of the decompression flow path 151 toward the inner wall surface of the tube 110.
  • it may have a pair of convex portions 155 projecting from two side surfaces 154 facing each other so as to face each other.
  • FIG. 11A it may have a pair of convex portions 155 projecting from two side surfaces 154 facing each other so as to face each other.
  • the decompression flow path 151 may have a plurality of pairs of convex portions 155 projecting from two side surfaces 154 facing each other so as to face each other. Also in the decompression flow path 151 shown in FIGS. 10A to 10C and 11A and 11B, an opening (not shown) of the second through hole is arranged at a place where foreign matter that has entered the flow path is likely to accumulate.
  • an emitter and a drip irrigation tube capable of suppressing the accumulation of foreign matter in the flow path.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental Sciences (AREA)
  • Soil Sciences (AREA)
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  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

Ce goutteur comprend : une partie d'admission d'eau comprenant un premier trou traversant pour introduire un liquide d'irrigation ; une partie d'évacuation qui est disposée de façon à faire face à un orifice d'évacuation et évacue le liquide d'irrigation ; et un trajet d'écoulement qui relie la partie d'admission d'eau et la partie d'évacuation et à travers lequel s'écoule le liquide d'irrigation. Le trajet d'écoulement comprend, dans la direction de l'écoulement du liquide d'irrigation, un trajet d'écoulement à réduction de pression pour réduire la pression du liquide d'irrigation introduit par le premier trou traversant. Le goutteur a en outre un second trou traversant débouchant sur l'extérieur et sur le trajet d'écoulement à réduction de pression. La direction de l'écoulement du liquide d'irrigation s'écoulant dans le trajet d'écoulement à réduction de pression n'est pas parallèle à la direction de l'écoulement du liquide d'irrigation s'écoulant dans le trajet d'écoulement à réduction de pression à partir du second trou traversant.
PCT/JP2020/033001 2019-09-04 2020-09-01 Goutteur et tube d'irrigation goutte à goutte WO2021045032A1 (fr)

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JP2019161473A JP2021036835A (ja) 2019-09-04 2019-09-04 エミッタおよび点滴灌漑用チューブ

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150041563A1 (en) * 2013-08-12 2015-02-12 Rain Bird Corporation Elastomeric emitter and methods relating to same
JP2019129784A (ja) * 2018-02-01 2019-08-08 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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150041563A1 (en) * 2013-08-12 2015-02-12 Rain Bird Corporation Elastomeric emitter and methods relating to same
JP2019129784A (ja) * 2018-02-01 2019-08-08 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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