CN108812221B - Pressure compensation water dropper - Google Patents
Pressure compensation water dropper Download PDFInfo
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- CN108812221B CN108812221B CN201810741592.0A CN201810741592A CN108812221B CN 108812221 B CN108812221 B CN 108812221B CN 201810741592 A CN201810741592 A CN 201810741592A CN 108812221 B CN108812221 B CN 108812221B
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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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Abstract
The invention discloses a pressure compensation water dropper, wherein the surface of a U-shaped flow channel energy dissipation tooth is a concave curved surface; the middle part of the bottom surface of the pressure compensation chamber is a circular bulge, the surface of the pressure compensation chamber is a convex curved surface, and the lower part of the pressure compensation chamber is a plane. The surface of the circular bulge is the surface of the water outlet groove. The outlet of the water outlet groove is deepest and is communicated with the water outlet hole, and the depth of the water outlet groove is continuously reduced from the outlet side of the water outlet groove to the flat groove at the inlet side of the water outlet groove. The elastic membrane is driven by the pressure difference delta P between the upper water pressure Pa and the lower water pressure Pb to bend and deform, and the contact peak of the elastic membrane and the curved edge of the opening surface of the water outlet groove forms the minimum water passing section of the water outlet groove. The pressure compensation dripper changes the minimum water passing depth of the water outlet groove by two modes of driving the elastic membrane-the contact peak displacement of the curved edge of the water outlet groove opening surface and pressing the elastic membrane into the water outlet groove by the water pressure difference delta P between the upper part and the lower part of the elastic membrane, thereby realizing the flow pressure compensation of the dripper and greatly improving the anti-blocking performance of the dripper.
Description
Technical Field
The invention belongs to the field of intersection of water-saving irrigation and mechanical manufacturing, relates to a pressure compensation water dropper, and particularly relates to a water dropper cover structure, a U-shaped flow channel energy dissipation tooth structure, a pressure compensation chamber and a water outlet groove structure.
Background
In the water-saving irrigation technology, the drip irrigation has the obvious advantages of water saving, yield increase, high efficiency and the like, and is widely applied to the production of crops such as fruit trees, vegetables, flowers, medicinal materials and the like. The water dropper is the core component of the drip irrigation system, and the performance of the water dropper plays a decisive role in the popularization, application and use effect of the whole drip irrigation system. Among them, the clogging of the dripper is a worldwide problem in the development of the drip irrigation technology, which not only affects the irrigation uniformity, increases the maintenance cost, but also affects the service life of the drip irrigation system.
The pressure compensation dripper is little influenced by the change of working pressure, has good irrigation uniformity, and has relatively good self-flushing function and anti-blocking performance. The structure of the pressure compensation water dropper generally comprises a flow passage, a pressure compensation chamber, a pressure compensation water outlet groove and an elastic diaphragm. The path of water flow passing through the pressure compensation dripper is that the water flow enters the dripper from a capillary through a dripper water inlet and then enters the flow channel through a flow channel water inlet, and the pressure of the water flow is gradually reduced and the flow speed is gradually reduced during the water flow passes through the flow channel containing the energy dissipation teeth, and then the water flow flows out of a flow channel outlet and enters a pressure compensation chamber; and finally, the drippers flow out of the pressure compensation water outlet groove. The pressure compensation dripper blockage can occur at the water inlet of the flow passage, between the energy dissipation teeth of the flow passage and at the outlet of the pressure compensation water outlet groove, and one or more blockage(s) can cause the dripper blockage, the water outlet quantity reduction and even the flow quantity is 0.
The new generation of typical pressure compensation dripper has the structural layout that the flow channel is laterally arranged on the outer wall of the dripper pressure compensation chamber, the bottom surface of the flow channel is cylindrical, the roots of one set of energy dissipation teeth are connected with the upper boundary of the flow channel, and the roots of the other set of energy dissipation teeth are connected with the lower boundary of the flow channel. After the bottom surface of the flow channel is flattened, two boundary lines of the flow channel are straight lines, namely the flow channel is in a linear structure. The flow state and energy dissipation effect of water flow passing through the flow passage are similar to those of a planar linear flow passage. The linear flow passage can greatly improve the anti-blocking capacity of the water inlet of the flow passage and the flow passage. Meanwhile, the linear flow channel has good energy dissipation effect, can effectively reduce the flow state index, and is favorable for improving the anti-blocking capability of the dripper pressure compensation water outlet groove. Taking a dripper with the Netafim flow rate of 4.4L/h as an example, the largest particle diameter of the dripper which can pass through the flow passage structure is larger than 120 mu m, and a filter screen with the aperture not larger than 120 meshes is required. The blockage of the dripper is usually generated at the outlet of the pressure compensation water outlet groove. After the drip irrigation system is closed and water supply is stopped, the blockage condition of the outlet of the water outlet groove can be discharged through self-flushing.
So far, no patent and research report about the structure of the pressure compensation water outlet tank improved by the pressure compensation water dropper is seen.
Disclosure of Invention
The invention discloses a pressure compensation water dropper, and particularly relates to a cover body structure, a U-shaped flow channel energy dissipation tooth structure, a pressure compensation chamber and a water outlet groove structure.
The pressure compensation dripper cover body structure is characterized in that the circular plug on the upper surface of the cover body is an inclined plane, the top end is sharp, no hole needs to be punched during installation, and the plug can be directly inserted into a capillary. The annular convex edge of the water inlet hole is arranged at the inner side of the cover body and is used for preventing the dripper from siphoning into soil. The Z-shaped convex edge at the middle part of the inner side of the cover body divides the pressure chamber of the inner cavity of the dripper base into two parts, prevents sundries in water in the pressure chamber at one side of the pressure compensation chamber from entering the pressure chamber at one side of the runner, and guides water flow to the water inlet of the U-shaped runner through the gap of the elastic membrane; the arc-shaped convex edges at the two ends of the inner side of the cover body are attached to the arc-shaped side walls at the two ends of the inner cavity of the dripper base, and the assembly positioning is realized.
In the embodiment, a U-shaped flow passage is adopted, and the energy dissipation teeth are of symmetrical triangular structures and are distributed in the flow passage at equal intervals. The energy dissipation tooth structure is characterized in that the surface of the energy dissipation tooth is a concave curved surface. For convenience of expression, the concave curved surface of the energy-dissipating tooth is divided into a section I, a section II and a section III in sequence from the root to the tipThe descending speed of the concave curved surface is expressed by the percentage of the descending amplitude D of the depth to the corresponding changing amplitude D of the horizontal distance. Section I concave curve descent speed (d)1/D1) 45% -90%, section II concave curve descending speed (d)2/D2) 20% -50%, section III concave curve descending speed (d)3/D3)0～25％。
The pressure compensation chamber of the pressure compensation dripper is positioned on one side of the inner cavity of the dripper base and is characterized in that the middle of the bottom surface of the pressure compensation chamber is a circular bulge, the surface of the pressure compensation chamber is a convex curved surface, and the lower part of the pressure compensation chamber is a plane. The surface of the circular bulge is the surface of the water outlet groove.
The invention relates to a water outlet tank of a pressure compensation dripper, which is characterized in that: the outlet of the water outlet groove is deepest and is communicated with the water outlet hole; the depth of the water outlet groove is continuously reduced from the outlet to the inlet side flat groove section. The depth of the flat groove section of the water outlet groove is not changed.
The surface of the water outlet groove is characterized in that one side of the outlet is a convex curved surface, and one side of the inlet is a plane. For convenience of description, the outlet channel surface is divided into section I, section II and section III in that order from the outlet to the inlet. The falling speed of the curved edge of the outlet groove opening surface is respectively expressed by the percentage of the height falling amplitude h to the corresponding horizontal distance change amplitude D. The falling speed (h) of the curved edge of the surface of the trough in the surface section I of the trough of this embodiment1/D1) 0-35%, when the falling speed of the curved edge of the notch surface of the section I is 0, the section I is a plane, namely the top surface of the circular protrusion is a plane; outlet trough surface section II trough surface curve edge descending speed (h)2/D2) 30% -75%; outlet channel surface section III channel surface curve edge descending speed (h)3/D3)0, i.e. the surface section III of the outlet channel is a plane.
The bottom surface of the water outlet groove is characterized in that: the bottom surface of one side of the outlet of the water outlet groove is a downward inclined surface and is communicated with the water outlet hole; the bottom surface of one side of the inlet of the water outlet groove is a plane and is communicated with the pressure compensation chamber. The included angle alpha between the inclined plane of the bottom surface of the water outlet groove and the plane extension surface ranges from 0 degree to 35 degrees. When alpha is 0 degree, the whole bottom surface of the water outlet groove is a plane. In addition, the bottom plane of the inlet side of the water outlet groove can also be inclined downwards to the inlet, namely the bottom plane of the inlet side of the water outlet groove can also be an inclined plane, and the inlet is deep.
Drawings
Fig. 1 is a schematic view of the components of a pressure compensated dripper of the invention.
Fig. 2 is a bottom view of the inside of the pressure compensating dripper cover.
Fig. 3 is a longitudinal cross-sectional view of the pressure compensating dripper assembly of the present invention.
Figure 4 is a cross-sectional view of the U-shaped flow channel of the pressure compensation dripper along the central line of the energy dissipation tooth.
Fig. 5 is a schematic diagram showing the principle of the change of the size of the space between the elastic diaphragm and the concave curved surface of the flow channel energy dissipation tooth.
Fig. 6 is a longitudinal cross-sectional view of the pressure compensating chamber of the pressure compensating dripper of the invention taken along the centerline of the outflow channel.
Fig. 7 is a schematic view of the pressure compensation principle of the pressure compensation chamber of the pressure compensation dripper of the invention.
FIG. 8 is a longitudinal cross-sectional view of the pressure compensation chamber of the outlet channel of the prototype taken along the centerline of the outlet channel.
Detailed Description
As shown in fig. 1, the pressure compensation dripper disclosed by the invention is composed of a cover body 1, an elastic diaphragm 5 and a dripper base 7. The upper part of the round plug 2 on the upper surface of the cover body 1 is an inclined plane 3, the top end is sharp, punching is not needed during installation, and the plug 2 can be directly inserted into a capillary. Referring to fig. 2 and 3, the annular rib 17 around the water inlet 4 on the inner side of the cap prevents the dripper from siphoning into the soil. The Z-shaped convex edge 18 at the middle part of the inner side of the cover body divides the pressure chamber of the inner cavity of the dripper base into two parts, prevents impurities in water in the pressure chamber 20 from entering the pressure chamber 21, and guides water flow to pass through the elastic diaphragm gap 6 to the water inlet 9 of the U-shaped flow passage; the arc-shaped convex edges 19 at the two ends of the inner side of the cover body are attached to the arc-shaped side walls at the two ends of the inner cavity 8 of the dripper base, and the function of the assembly positioning is realized.
As shown in fig. 1 and 3, the elastic membrane 5 is disposed on the surfaces of the U-shaped flow channel 10 and the pressure compensation chamber 13, and the gap 6 on one longitudinal side of the elastic membrane corresponds to the water inlet 9 of the U-shaped flow channel. The elastic membrane 5, the U-shaped flow channel 10 and the pressure compensation chamber water outlet groove 15 jointly implement the pressure compensation function of the dripper, and the stable flow of the dripper is kept.
Referring to fig. 1 and 4, the pressure compensation dripper is designed by adopting a U-shaped flow passage 10, and energy dissipation teeth 11 are of symmetrical triangular structures and are distributed in the flow passage at equal intervals. The energy dissipation tooth 11 is characterized in that the surface 12 thereof is a concave curved surface. For the sake of convenience, the concave curved surface 12 of the dissipator surface is divided into a section I, a section II and a section III in sequence from the dissipator root 24 to the tip 23, the speed of descent of the concave curved surface being expressed in percentage terms of the ratio of the extent of depth descent D to the corresponding extent of change D in the horizontal distance, respectively. The descending speed (d) of the concave curved surface of the energy dissipation tooth surface section I of the embodiment1/D1) 45% -90%, section II concave curve descending speed (d)2/D2) 20% -50%, section III concave curve descending speed (d)3/D3)0～25％。
Referring to fig. 1, 4 and 5, the elastic diaphragm 5 is disposed on the surface of the U-shaped flow channel 10. The water flow through the U-shaped channel 10 has two flow regime characteristics: when water flows through the space 22 between the concave curved surface 12 on the surface of the energy dissipation tooth and the bottom surface 25 of the flow channel, the direction of the water flow is changed continuously, but the size of the cross section of the water flow is not changed; when water flows through the space between the concave curved surface 12 on the surface of the energy dissipation tooth and the elastic diaphragm 5, the direction of the water flow is kept unchanged, but the size of the water passing section is changed due to the change of the deformation and downward bending amplitude of the elastic diaphragm 12. The magnitude of the downward bending of the elastic diaphragm 5 depends on the elastic diaphragm return force F and the pressure difference ap between the upper hydraulic pressure Pa and the lower hydraulic pressure Pb of the elastic diaphragm. When the difference delta P between the water pressure of the elastic membrane and the water pressure of the water on the elastic membrane is larger than the resilience force F of the elastic membrane, the elastic membrane 5 bends downwards, and the water passing section between the elastic membrane and the concave curved surface 12 of the tooth surface is reduced along with the downward bending. Under the condition that the dripper is unobstructed, along with the increase of the water supply pressure of a drip irrigation system, the water pressure Pa above the elastic membrane 5, the water pressure Pb below the elastic membrane 5 and the pressure difference delta P between the water pressures increase, the elastic membrane 5 is gradually bent towards the concave curved surface 12 on the surface of the energy dissipation tooth, and the water passing section between the elastic membrane 5 and the energy dissipation tooth is gradually reduced.
Referring to fig. 5, under the condition of specific water supply pressure and dripper flow, the water pressures Pa and Pb above and below the diaphragm remain unchanged, the pressure difference Δ P and the resilience force F of the elastic diaphragm are in a certain equilibrium state, and the downward bending degree of the elastic diaphragm 5 and the size of the water passing section between the concave curved surface 12 of the tooth surface remain unchanged. However, when the water outlet groove 15 is blocked and the water outlet amount is reduced, the water pressure Pa above the elastic diaphragm is approximately unchanged, and the water pressure Pb below the elastic diaphragm is increased, so that the pressure difference Δ P between the upper part and the lower part of the elastic diaphragm is reduced, the elastic diaphragm 5 rebounds upwards under the action of the rebound force F, and the water passing gap between the elastic diaphragm 5 and the concave curved surface 12 on the surface of the energy dissipation tooth is increased. The upward rebound amplitude of the elastic membrane 5 depends on the blockage of the water outlet groove 15 and the degree of water yield reduction, the larger the water yield reduction amplitude is, the smaller the pressure difference delta P between the upper part and the lower part of the elastic membrane is, and the larger the upward rebound amplitude of the elastic membrane 5 is under the action of the rebound force F. When the water outlet groove 15 is completely blocked and the water outlet amount of the dripper is 0, the upper water pressure Pa and the lower water pressure Pb of the elastic membrane are equal, the pressure difference delta P is 0, and the elastic membrane 5 is completely restored to a straight state under the action of the resilience force F.
As shown in fig. 1 and 6, the pressure compensation chamber 13 of the present embodiment is located on one side of the inner cavity 8 of the base of the dripper, and is characterized in that the bottom surface 29 of the pressure compensation chamber has a central circular protrusion 14, a convex curved surface on the surface, and a flat surface on the lower part. The round convex surface is the surface of the water outlet groove.
As shown in fig. 6, the outlet channel 15 of the pressure compensation dripper of the present invention is characterized in that the outlet thereof is deepest and is communicated with the water outlet; the depth of the outlet channel 15 decreases from the outlet to the flat channel 26. The outlet channel land section 26 has a constant depth.
As shown in FIG. 6, the surface of the exit channel 15 is characterized by a convex curvature on the exit side and a flat surface on the entrance side. For convenience of description, the outlet channel surface is divided into section I, section II and section III in that order from the outlet to the inlet. The falling speed of the curved edge of the outlet groove opening surface is respectively expressed by the percentage of the height falling amplitude h to the corresponding horizontal distance change amplitude D. The falling speed (h) of the curved edge of the surface of the groove opening of the surface section I of the water outlet groove 15 of the present embodiment1/D1) 0-35%, when the falling speed of the curved edge of the notch surface of the section I is 0, the section I is a plane, namely the top surface 31 of the circular protrusion is a plane (figure 8); outlet trough surface section II trough surface curve edge descending speed (h)2/D2) 30% -75%; water outlet groove meterFace segment III notch face ramp descent speed (h)3/D3)0, i.e. the surface section III of the outlet channel is a plane.
As shown in FIG. 6, the bottom surface of the outlet channel 15 is characterized in that: the bottom surface 27 at one side of the outlet of the water outlet groove is an inclined surface and is communicated with the water outlet hole 16; the bottom surface 26 at the inlet side of the water outlet groove is a plane and is communicated with the pressure compensation chamber 13. The included angle alpha between the inclined plane 27 of the bottom surface of the water outlet groove and the extension plane of the bottom surface 26 of the water outlet groove ranges from 0 degree to 35 degrees. When alpha is 0 degrees, the bottom slope 27 of the water outlet groove is a plane, i.e. the whole bottom of the water outlet groove is a plane (fig. 8). In addition, the bottom surface plane 26 of the outlet channel may also be inclined downward toward the inlet, i.e., the bottom surface is an inclined surface and the inlet is deep.
The principle of pressure compensation. As shown in fig. 7 and 8, when the pressure of the water supplied to the drip irrigation system increases to a certain extent, the elastic diaphragm 5 on the surface of the pressure compensation chamber 13 is deformed from a flat state to be bent downward and pressed to the circular convex top surface 31 in the middle of the bottom surface 29 of the pressure compensation chamber. As the water supply pressure increases, the elastic diaphragm 5 is further bent downward from the circular protrusion top surface 31, and the contact surface with the convex curved surface of the circular protrusion 14 increases. The contact points of the outer edges of the contact surfaces with the outlet channel curved edge 28 are referred to as the elastomeric membrane-outlet channel curved edge contact peaks 30. At the contact peak 30, the clearance formed by the elastic membrane 5 and the curved edge 28 of the outlet groove opening surface is the minimum water passing clearance of the outlet groove 15, and the depth of the outlet groove at the contact peak 30 is the water passing depth of the outlet groove 15. Under the condition that the dripper is unobstructed, the water pressure Pa above the elastic membrane 5, the water pressure Pb below the elastic membrane 5 and the differential pressure delta P of the water pressure Pa are increased along with the increase of the water supply pressure of the drip irrigation system. When the pressure difference delta P is larger than the resilience force F of the elastic membrane, the contact peak 30 of the curved edge of the opening surface of the elastic membrane and the water outlet groove is driven to further downwards extend, and the water passing depth of the water outlet groove 15 is further reduced, so that the flow of the water outlet groove is kept stable. However, as the water supply pressure and the difference Δ P between the water pressure on the elastic diaphragm 5 and the water pressure on the elastic diaphragm 5 further increase, when the elastic diaphragm-outlet channel opening curved edge contact peak 30 extends to the outlet channel opening curved edge horizontal section (outlet channel surface section III), the outlet channel water passing depth is reduced in such a manner that the elastic diaphragm 5 is pressed into the outlet channel, and the flow rate is kept stable.
Anti-clogging principle. Under the conditions of specific water supply pressure and smooth drippers, the upper water pressure Pa and the lower water pressure Pb of the elastic membrane 5 are kept unchanged, the pressure difference delta P and the resilience force F of the elastic membrane are in a balanced state, the contact peak 30 of the curved edge of the opening surface of the elastic membrane and the water outlet groove is positioned at a certain specific position, and the water passing depth and the water flow rate of the water outlet groove are kept unchanged. However, when the impurity particles with a particle size larger than the outlet channel water passing depth reach the curved ridge contact peak 30 of the outlet channel mouth surface, the outlet channel water passing section is partially blocked, the water yield is reduced, the water pressure Pb below the elastic membrane is increased, and the water pressure Pa above the elastic membrane is approximately unchanged, so the water pressure difference Δ P between the upper and lower sides of the elastic membrane is reduced, the elastic membrane 5 rebounds upwards under the action of the rebound force F, the curved ridge contact peak 30 of the outlet channel mouth surface of the elastic membrane moves upwards, the outlet channel 15 water passing depth is increased, and the blocking object is discharged. Then, the water outlet groove 15 is restored to be smooth, the water pressure Pb below the elastic membrane and the pressure difference delta P between the upper part and the lower part of the elastic membrane are restored to the original values, and the contact peak 30 of the elastic membrane and the curved edge of the water outlet groove mouth surface is restored to the original position. The extent of the rebound of the elastic membrane 5 and the increase of the water passing depth of the water outlet groove 15 depends on the extent of the blockage of the water passing section of the water outlet groove 15 and the decrease of the flow rate of the water. The larger the blocked area of the water outlet section of the water outlet groove is, the more the water outlet amount is reduced, the smaller the pressure difference delta P between the upper part and the lower part of the elastic membrane is, and the larger the rebound amplitude of the elastic membrane 5 and the increase amplitude of the water outlet depth of the water outlet groove 15 are under the action of the rebound force F. Under the condition of 100Kpa water supply pressure in a laboratory, the maximum increase amplitude (potential) of the water passing depth of the water outlet groove 15 of the pressure compensation dripper is about 50% of the water passing depth of the water outlet groove 15 when the water passing depth is smooth.
Claims (10)
1. A pressure compensation dripper comprises a cover body (1), a dripper base (7) and an elastic diaphragm (5) arranged between the cover body (1) and the dripper base (7);
the method is characterized in that: the cover body (1) is provided with a water inlet hole (4), and the middle part of the inner side of the cover body (1) is provided with a convex edge (18);
a pressure chamber enclosed by the lower surface of the cover body (1), the upper surface of the elastic membrane (5) and the inner cavity wall of the dripper base (7) is divided into a first pressure chamber (20) and a second pressure chamber (21) by a rib (18);
the first pressure chamber (20) is communicated with the water inlet hole (4);
a U-shaped flow channel (10) and a pressure compensation chamber (13) are arranged in a cavity enclosed by the lower surface of the elastic membrane (5) and the inner cavity wall of the dripper base (7); the pressure compensation chamber (13) is communicated with the U-shaped flow channel (10);
the elastic membrane (5) is arranged on the surfaces of the pressure compensation chamber (13) and the U-shaped flow channel (10), and a gap (6) on one side of the elastic membrane (5) corresponds to a water inlet (9) of the U-shaped flow channel (10);
a plurality of energy dissipation teeth (11) are distributed in the U-shaped flow channel (10), and the upper surfaces (12) of the energy dissipation teeth (11) are concave curved surfaces;
the middle part of the bottom surface (29) of the pressure compensation chamber is provided with a circular bulge (14), the upper part of the surface of the circular bulge (14) is a convex curved surface, and the lower part of the surface of the circular bulge is a plane; the water outlet hole (16) is positioned in the middle of the circular bulge (14); the round bulge (14) is provided with a water outlet groove (15).
2. The pressure compensating dripper of claim 1, wherein:
the bottom surface (27) at one side of the outlet of the water outlet groove (15) is an inclined surface and is communicated with the water outlet hole (16); the bottom surface (26) at one side of the inlet of the water outlet groove (15) is a plane and is communicated with the pressure compensation chamber (13).
3. The pressure compensating dripper of claim 1, wherein:
the bottom surface (27) at one side of the outlet of the water outlet groove (15) is an inclined surface and is communicated with the water outlet hole (16); the bottom surface (26) at the inlet side of the water outlet groove (15) is an inclined surface, and the bottom surface (26) at the inlet side of the water outlet groove (15) is inclined downwards from the inlet and is communicated with the pressure compensation chamber (13).
4. The pressure compensating dripper of claim 2, wherein:
the bottom surface (27) at the outlet side of the water outlet groove is a downward inclined surface, and the included angle alpha between the bottom surface (27) at the outlet side of the water outlet groove and the extended surface of the bottom surface (26) at the inlet side of the water outlet groove ranges from 0 degree to 35 degrees.
5. The pressure compensating dripper of claim 4, wherein:
the water outlet groove (15) leads the surface of the water outlet groove from the outlet to the inletSequentially dividing the section into a section I, a section II and a section III; respectively by height descent h1、h2、h3With a corresponding horizontal distance variation amplitude D1、D2、D3The percentage of the ratio represents the falling speed of the curved edge of the water outlet groove opening surface of the section I, the section II and the section III;
wherein, the falling speed h of the curved edge of the section I notch surface1/D10-35% propanoid;
section II notch surface curved edge descending speed h2/D2From 30% to 75% propanoid;
section III notch face curved edge descending speed h3/D3Is 0.
6. The pressure compensating dripper of claim 1, wherein:
the energy dissipation tooth (11) divides the concave curved surface (12) on the surface of the energy dissipation tooth into a section I, a section II and a section III from the tooth root to the tooth tip in sequence, and the depth descending range d is respectively used1、d2、d3With a corresponding horizontal distance variation amplitude D1、D2、D3The percentage of the ratio represents the descending speed of the concave curved surface;
wherein, the descending speed d of the concave curved surface of the section I1/D145-90% propanoid;
section II concave curve descent speed d2/D220% to 50% propanoid;
section III concave curve descent speed d3/D30-25% w.
7. The pressure compensating dripper of claim 1, wherein:
the upper surface of the cover body (1) is provided with a circular plug (2), the circular plug (2) is an inclined plane, and the top end of the circular plug is sharp;
a water inlet (4) is arranged in the round plug (2);
the water inlet hole (4) at the inner side of the cover body (1) is provided with an annular convex rib (17).
8. The pressure compensating dripper of claim 7, wherein: the arc-shaped convex edges (19) at the two ends of the inner side of the cover body (1) are attached to the arc-shaped side walls at the two ends of the inner cavity of the dripper base (7).
9. The pressure compensating dripper of claim 1, wherein: the rib (18) is a Z-shaped rib.
10. The pressure compensating dripper of claim 1, wherein: the energy dissipation teeth (11) are triangular-like energy dissipation teeth, and a plurality of triangular-like energy dissipation teeth are distributed in the flow channel at equal intervals.
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| CN201810741592.0A CN108812221B (en) | 2018-07-06 | 2018-07-06 | Pressure compensation water dropper |
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| CN201810741592.0A CN108812221B (en) | 2018-07-06 | 2018-07-06 | Pressure compensation water dropper |
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| CN110419418B (en) * | 2019-07-16 | 2022-03-08 | 三峡大学 | Single-ellipse double-throwing streamline type emitter plug and installation method thereof |
| CN111053021A (en) * | 2019-12-26 | 2020-04-24 | 秦春明 | Drip irrigation pipe with anti-blocking function and processing method thereof |
| CN111066641B (en) * | 2020-01-13 | 2023-06-20 | 上海华维可控农业科技集团股份有限公司 | Pressure compensation type drip irrigation belt |
| CN114847130B (en) * | 2022-05-26 | 2023-12-19 | 河南省景观规划设计研究院有限公司 | Water-saving drip irrigation device capable of evenly discharging water |
| CN116267540B (en) * | 2023-03-01 | 2024-04-26 | 西北农林科技大学 | Digital variable irrigation group control method |
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| GB2484924A (en) * | 2010-10-25 | 2012-05-02 | Amirim Products Dev & Patents Ltd | An on line drip irrigation emitter having an inlet filtering dvice |
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2018
- 2018-07-06 CN CN201810741592.0A patent/CN108812221B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204929868U (en) * | 2015-09-02 | 2016-01-06 | 沈阳远大智能高科农业有限公司 | A kind of pressure compensation antidrip water dropper |
| CN205694737U (en) * | 2016-04-18 | 2016-11-23 | 青岛新大成塑料机械有限公司 | Inserted-blade type water dropper and drip irrigation zone in miniature anti-stifled single hole |
| CN206641120U (en) * | 2017-04-14 | 2017-11-17 | 海南顺禾节水科技有限公司 | A kind of pressure compensating emitter |
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| CN108812221A (en) | 2018-11-16 |
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