CN110367090B - Streamline plug-in pressure compensation irrigator - Google Patents
Streamline plug-in pressure compensation irrigator Download PDFInfo
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- CN110367090B CN110367090B CN201910755320.0A CN201910755320A CN110367090B CN 110367090 B CN110367090 B CN 110367090B CN 201910755320 A CN201910755320 A CN 201910755320A CN 110367090 B CN110367090 B CN 110367090B
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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
Abstract
A streamlined plug-in pressure compensation irrigator comprises an irrigator plug with a dripper water inlet, wherein the lower part of the irrigator plug is sequentially connected with a cavity shell and a water outlet outer cavity from top to bottom, a base is arranged in the cavity shell, a dripper cavity is arranged between the upper surface of the base and the cavity shell, an elastic gasket is arranged in the dripper cavity, a gasket hole communicated with the water inlet of a compensation flow channel is formed in the elastic gasket, a labyrinth flow channel is arranged between the side surface of the base and the inner wall of the cavity shell, and the water inlet of the dripper is communicated with the water outlet of the water outlet outer cavity after being communicated with the labyrinth flow channel through the gasket hole, the water inlet of the compensation flow channel and a pressure compensation channel formed in the base. The streamline plug-in pressure compensation irrigator provided by the invention can solve the problem of head loss caused by sudden change of the cross section shape of the capillary at the plug bulge, furthest reduces the shape resistance of the plug part of the irrigator, and has simple geometric shape and excellent hydrodynamic property.
Description
Technical Field
The invention relates to the field of micro-irrigation emitter design, in particular to a streamline insertion type pressure compensation emitter.
Background
Drip irrigation is widely applied as an efficient water-saving irrigation technology, and an insertion type irrigator is widely applied due to the advantages of simple installation, convenient maintenance and strong adaptability. Because the plug part of the plug-in type irrigator is inserted into the capillary, a bulge can be formed in the pipeline, and the bulge of the plug causes the shape of the section of the capillary to be suddenly changed, so that the local head loss is generated, and the low-pressure drip irrigation is obviously a hot technology in the drip irrigation field due to the energy-saving quality-improving effect of the low-pressure drip irrigation. However, the low-pressure drip irrigation operation pressure is low, and how to reduce the water head loss of a pipe network to the maximum under the low-pressure condition, improve the irrigation uniformity and reduce the blockage problem of a dripper becomes the key of the low-pressure drip irrigation development.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a streamline plug-in type pressure compensation emitter, which can solve the problem of head loss caused by sudden change of the cross section shape of a capillary at the protrusion of a plug, furthest reduce the shape resistance of the plug part of the emitter, and has simple geometric shape and excellent hydrodynamic property.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a streamlined plug-in pressure compensation irrigator comprises an irrigator plug with a dripper water inlet, wherein the lower part of the irrigator plug is sequentially connected with a cavity shell and a water outlet outer cavity from top to bottom, a base is arranged in the cavity shell, a dripper cavity is arranged between the upper surface of the base and the cavity shell, an elastic gasket is arranged in the dripper cavity, a gasket hole communicated with a compensation flow channel water inlet is formed in the elastic gasket, a labyrinth flow channel is arranged between the side surface of the base and the inner wall of the cavity shell, and the dripper water inlet is communicated with the dripper water outlet of the water outlet outer cavity after being communicated with the labyrinth flow channel through the gasket hole, the compensation flow channel water inlet and a pressure compensation flow channel formed in the base.
The irrigator plug comprises a plug inverted cone, and the lower part of the plug inverted cone is connected with a plug taper neck.
The irrigator plug is a single-ellipse double-parabolic streamline irrigator plug or a single-ellipse double-circular streamline irrigator plug.
When the irrigator plug is a single-ellipse double-throw streamline irrigator plug, the cross-section streamline of the plug inverted cone and the plug taper neck is a single-ellipse double-throw streamline curve, the water-facing section of the single-ellipse double-throw streamline curve is an ellipse curve, and the water-removing section of the single-ellipse double-throw streamline curve is formed by connecting two sections of parabola curves.
When the irrigator plug is a single-ellipse double-circle streamline type irrigator plug, the cross-sectional streamline of the inverted cone and the tapered neck of the plug is a single-ellipse double-circle streamline type curve, the water-incoming section of the single-ellipse double-circle streamline type curve is an elliptic curve, and the water-outgoing section of the single-ellipse double-circle streamline type curve is formed by connecting two sections of circular curves.
The inner wall of the cavity shell is provided with a support ring, the upper surface of the elastic gasket is matched with the support ring, and a gasket hole of the elastic gasket is communicated with the water inlet of the water dropper through the support ring.
The pressure compensation flow channel leads to the side wall of the base from the center of the base and is communicated with the inlet of the labyrinth flow channel.
The labyrinth flow passage is in a rectangular tooth shape, and the outlet of the labyrinth flow passage is communicated with the water outlet of the water dropper through the base outflow passage.
The design principle of the streamline plug-in type pressure compensation irrigator provided by the invention is as follows:
weak resistance principle: the plug part of the plug-in type irrigator needs to go deep into the capillary, a bulge can be formed in the pipeline, and the bulge of the plug causes the shape of the section of the capillary to change suddenly, so that the local head loss is generated. When water flow of the drip irrigation pipe flows through the plug, the water flow is transversely extruded and separated at the water-facing section of the plug, and the water flow separation is smoother because the water-facing section of the streamline plug is changed into an elliptic curve from a traditional circular curve, the range of a pressure blocking area formed in front of the water-facing section is smaller, and the pressure is lower. The water flow enters the flow removal section after passing through the water inlet section, and the water flow is not separated from the side wall in the flow removal section but flows down along the side wall. The downstream of the plug does not have a negative pressure vortex area, so that the shape resistance of the capillary water flow at the convex part of the plug is reduced, and the local head loss of the emitter plug is reduced.
Anti-clogging principle: the shape of the plug of the emitter is changed from a non-streamline shape to a streamline shape, so that the water flow near the protrusion of the plug is changed from violent rolling to smooth rolling, solid particles in the water flow are changed from gathering near the plug to flowing downwards, the probability that the solid particles enter the emitter is reduced, and the risk of blocking the emitter is reduced.
Pressure compensation principle: the base is provided with a pressure compensation flow passage, and when pressurized water flows into the dripper cavity, the elastic gasket extrudes the compensation flow passage downwards under the action of pressure, so that the water passing area of the compensation flow passage is reduced. But the flow velocity is increased due to the increase of the pressure, and the area of the cross section of the water is reduced, so that the actual total amount of the water passing is kept relatively stable, and the pressure compensation effect is realized.
The streamline inserted pressure compensation irrigator provided by the invention has a simple geometric shape and excellent hydrodynamic characteristics. When water flows through the plug, the water flow cannot be separated in advance on the side wall of the plug, and the tail part of the plug is free of a negative pressure vortex region, so that the shape resistance of capillary water flow at the convex part of the plug is reduced, the local head loss of the irrigator is reduced, the conveying distance of the water flow in the capillary is increased, the laying length of the capillary is increased, and the irrigation uniformity and the irrigation area are increased under the same condition. The shape of the plug of the emitter is changed from a non-streamline shape to a streamline shape, so that the water flow at the convex part of the plug is changed from violent rolling to smooth and smooth, solid particles in the water flow are changed from gathering near the plug to flowing downwards, the probability that the solid particles enter the emitter is reduced, and the risk of blocking the emitter is reduced. The irrigator has the pressure compensation function, can reduce the resistance of the dripper no matter on a sloping field or a flat ground, prolongs the laying length of the capillary and improves the irrigation uniformity.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is an isometric view of the present invention;
FIG. 3 is a schematic diagram illustrating the creation of a plug back taper for an emitter plug in accordance with an embodiment of the present invention;
FIG. 4 is a graph of a first single-ellipse double-parabolic curve for an emitter plug according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating the generation of a plug back taper of a second emitter plug according to an embodiment of the present invention;
FIG. 6 is a graph of a second single-ellipse dual-circle streamline curve for a second emitter plug according to an embodiment of the present invention;
FIG. 7 is a diagram of the water flow streamlines in the vicinity of a three-stream emitter plug according to an embodiment of the present invention;
FIG. 8 is a diagram of the distribution of water flow lines near the plug of a three-cone emitter in accordance with an embodiment of the present invention;
FIG. 9 is a water turbulence intensity distribution diagram near a plug of a tri-linear emitter in accordance with an embodiment of the present invention;
FIG. 10 is a diagram showing the turbulence intensity distribution of water flow near the three-cone emitter plug according to the embodiment of the present invention.
Detailed Description
Example one
As shown in fig. 1 and 2, a streamlined plug-in pressure compensation emitter comprises an emitter plug 1 with an emitter water inlet 2, the lower portion of the emitter plug 1 is sequentially connected with a cavity shell 12 and an outer water outlet cavity 16 from top to bottom, a base 10 is arranged in the cavity shell 12, an emitter cavity 14 is arranged between the upper surface of the base 10 and the cavity shell 12, an elastic gasket 5 is arranged in the emitter cavity 14, a gasket hole communicated with a compensation flow channel water inlet 6 is formed in the elastic gasket 5, a labyrinth flow channel 11 is arranged between the side surface of the base 10 and the inner wall of the cavity shell 12, and the emitter water inlet 2 is communicated with the labyrinth flow channel 11 through the gasket hole, the compensation flow channel water inlet 6 and a pressure compensation flow channel 7 formed in the base 10 and then communicated with an emitter water outlet 15 of the outer water outlet 16.
The irrigator plug 1 comprises a plug inverted cone 3, and the lower part of the plug inverted cone 3 is connected with a plug taper neck 4.
The irrigator plug 1 is a single-ellipse double-throw streamline irrigator plug, the cross-sectional streamline of the plug inverted cone 3 and the plug taper neck 4 is a single-ellipse double-throw streamline curve, the water-facing section of the single-ellipse double-throw streamline curve is an ellipse curve, and the water-removing section of the single-ellipse double-throw streamline curve is formed by connecting two sections of parabola curves.
The detailed technical scheme of the emitter plug 1 is as follows:
a single-ellipse double-throw streamline irrigator plug comprises a plug inverted cone 3, wherein a plug water inlet is formed in the upper end face of the plug inverted cone 3, the lower surface of the plug inverted cone 3 is communicated with a plug taper neck 4, the cross section contour line of the plug inverted cone 3 is a single-ellipse double-throw streamline curve, the plane space area defined by a second single-ellipse double-throw streamline curve 18 on the upper end face of the plug inverted cone 3 is the minimum, and the plane space area defined by a first single-ellipse double-throw streamline curve 19 on the lower end face of the plug inverted cone is the maximum; the cross section contour line of the plug taper neck 4 is a single-ellipse double-throw streamline curve, and the plane space areas enclosed by the plug taper neck single-ellipse double-throw streamline curves on the upper end face and the lower end face are the same.
As shown in fig. 3:
the plug back taper 3 is obtained by the following steps:
step 1: a first single-ellipse double-parabolic streamline curve 19 is obtained through mathematical expression combination;
step 2: setting a rectangular coordinate system by taking a central point O of the first single-ellipse double-parabolic streamline curve 19 as a datum point, reducing the first single-ellipse double-parabolic streamline curve 19 by n times, wherein n is more than 0 and less than 1 to obtain a second single-ellipse double-parabolic streamline curve 18, and setting the central point of the second single-ellipse double-parabolic streamline curve 18 as O';
and step 3: vertically moving a second single-ellipse double-parabolic streamline curve 18 upwards for a distance h to connect central points OO' of the two curves;
and 4, step 4: and taking the second single-ellipse double-parabolic streamline curve 18 as the upper end surface of the plug back taper 3, taking the first single-ellipse double-parabolic streamline curve 19 as the lower end surface of the plug back taper 3, taking the central point OO' of the two curves as a path, and obtaining the plug back taper 3 through lofting.
The plug neck 4 is obtained by the following steps:
step 1: a first single-ellipse double-parabolic streamline curve 19 is obtained through mathematical expression combination;
step 2: and setting a rectangular coordinate system by taking a central point O of the first single-ellipse double-parabolic streamline curve 19 as a datum point, reducing the first single-ellipse double-parabolic streamline curve 19 by m times, wherein m is more than or equal to 0.6 and less than or equal to 0.8 to obtain a plug taper neck single-ellipse double-parabolic streamline curve, and vertically stretching the plug taper neck single-ellipse double-parabolic streamline curve to obtain a plug taper neck 4.
As shown in fig. 4, two axes perpendicular to each other and having intersection points of O points are set in a plane where the first single-ellipse double-parabolic streamline curve 19 is located, wherein the horizontal axis is an X axis, and the vertical axis is a Y axis, which is an XOY rectangular coordinate system, and the intersection points of the first single-ellipse double-parabolic streamline curve 19 and the XOY rectangular coordinate system are respectively defined as 1,2,3, and 4 points; wherein:
the first single-ellipse double-parabolic streamline curve 19 is a single-ellipse double-parabolic streamline curve formed by connecting the head and the tail of the water-facing section curve 1-2-3 and the flow-removing section curve 1-4-3;
the water-facing section curve 1-2-3 is an elliptic curve;
the defluidizing section curve 1-4-3 is formed by connecting a parabolic curve 1-4 and a parabolic curve 3-4.
The equation of the curve 1-2-3 of the water-facing section is as follows:
a2y2+b2x2＝a2b2
where a is the ellipse major semi-axis, unit: mm; b is the ellipse minor semi-axis, unit: mm; the value range of a is as follows: a is more than or equal to 1 and less than or equal to 10; the value range of b is as follows: b is more than or equal to 1 and less than or equal to 8; a is more than or equal to b; x is the abscissa of any point of the ellipse, and y is the ordinate of any point of the ellipse; -a ≦ x ≦ 0, -b ≦ y ≦ b.
The equations for the parabolic curves 1-4 are:
y＝k2x2+b
in the formula, b is the distance from the vertex of the parabolic curve 1-4 to the origin of coordinates, and is also an ellipse minor semi-axis, unit: mm; k is a radical of2Coefficient for determining the shape and opening direction of the parabola 1-4, k2The value range is as follows: -1. ltoreq. k2Less than or equal to-0.01; x is the abscissa of any point of the parabolic 1-4 equation, y is the ordinate of any point of the parabolic 1-4 equation, x is greater than or equal to 0, and y is greater than or equal to 0.
The parabolic curve 3-4 equation is:
y＝k1x2-b
in the formula, b is the distance from the vertex of the parabolic curve 3-4 to the origin of coordinates, and is also an ellipse minor semi-axis, unit: mm; k is a radical of1Coefficient for determining the shape and opening direction of parabola 3-4, k1The value range is as follows: k is more than or equal to 0.011Less than or equal to 1; x is the abscissa of any point of the parabola 3-4 equation, y is the ordinate of any point of the parabola 3-4 equation, x is more than or equal to 0, and y is less than or equal to 0.
The inner wall of the cavity shell 12 is provided with a supporting ring 13, the upper surface of the elastic gasket 5 is matched with the supporting ring 13, and a gasket hole of the elastic gasket 5 is communicated with the water inlet 2 of the water dropper through the supporting ring 13.
The pressure compensating flow passage 7 is opened from the center of the base 10 to the side wall of the base 10 and communicates with the labyrinth flow passage inlet 8 of the labyrinth flow passage 11.
The labyrinth flow passage 11 is a labyrinth flow passage in the form of a rectangular tooth flow passage, and the outlet of the labyrinth flow passage is communicated with the water outlet 15 of the dripper through the base outflow passage 9.
Example two
As shown in fig. 1 and 2, a streamlined plug-in pressure compensation emitter comprises an emitter plug 1 with an emitter water inlet 2, the lower portion of the emitter plug 1 is sequentially connected with a cavity shell 12 and an outer water outlet cavity 16 from top to bottom, a base 10 is arranged in the cavity shell 12, an emitter cavity 14 is arranged between the upper surface of the base 10 and the cavity shell 12, an elastic gasket 5 is arranged in the emitter cavity 14, a gasket hole communicated with a compensation flow channel water inlet 6 is formed in the elastic gasket 5, a labyrinth flow channel 11 is arranged between the side surface of the base 10 and the inner wall of the cavity shell 12, and the emitter water inlet 2 is communicated with the labyrinth flow channel 11 through the gasket hole, the compensation flow channel water inlet 6 and a pressure compensation flow channel 7 formed in the base 10 and then communicated with an emitter water outlet 15 of the outer water outlet 16.
The irrigator plug 1 comprises a plug inverted cone 3, and the lower part of the plug inverted cone 3 is connected with a plug taper neck 4.
The irrigation emitter plug 1 is a single-ellipse double-circle streamline type irrigation emitter plug, cross-sectional streamlines of a plug inverted cone 3 and a plug taper neck 4 of the irrigation emitter plug are single-ellipse double-circle streamline curves, a water-incoming section of the single-ellipse double-circle streamline curves is an elliptic curve, and a water-outgoing section of the single-ellipse double-circle streamline curves is formed by connecting two sections of circular curves.
The detailed technical scheme of the emitter plug 1 is as follows:
a single-ellipse double-circle streamline type irrigator plug comprises a plug inverted cone 3, wherein a plug water inlet is formed in the upper end face of the plug inverted cone 3, the lower surface of the plug inverted cone 3 is communicated with a plug taper neck 4, the cross section contour line of the plug inverted cone 3 is a single-ellipse double-circle streamline type curve, the area of a plane space enclosed by a first single-ellipse double-circle streamline type curve 17 of the upper end face is the minimum, and the area of a plane space enclosed by a second single-ellipse double-circle streamline type curve 20 of the lower end face is the maximum; the cross section contour line of the plug taper neck 4 is a single-ellipse double-circle streamline curve, and the plane space areas enclosed by the single-ellipse double-circle streamline curves of the plug taper necks of the upper end face and the lower end face are the same.
As shown in fig. 5:
the plug back taper 3 is obtained by the following steps:
step 1: a second single-ellipse double-circle streamline curve 20 is obtained through mathematical expression combination;
step 2: setting a rectangular coordinate system by taking the central point A of the second single-ellipse double-circle streamline curve 20 as a datum point, reducing the second single-ellipse double-circle streamline curve 20 by n times, wherein n is more than 0 and less than 1 to obtain a first single-ellipse double-circle streamline curve 17, and setting the central point of the first single-ellipse double-circle streamline curve 17 as A';
and step 3: vertically moving a first single-ellipse double-circle streamline curve 17 upwards for a distance h to connect the central points AA' of the two curves;
and 4, step 4: the first single-ellipse double-circle streamline curve 17 is used as the upper end face of the plug back taper 3, the second single-ellipse double-circle streamline curve 20 is used as the lower end face of the plug back taper 3, the central point AA' of the two curves is used as a path, and the plug back taper 3 is obtained through lofting.
The plug neck 4 is obtained by the following steps:
step 1: a second single-ellipse double-circle streamline curve 20 is obtained through mathematical expression combination;
step 2: and setting a rectangular coordinate system by taking the central point A of the second single-ellipse double-circle streamline curve 20 as a reference point, reducing the second single-ellipse double-circle streamline curve 20 by m times, wherein m is more than or equal to 0.6 and less than or equal to 0.8 to obtain a plug taper neck single-ellipse double-circle streamline curve, and vertically stretching the plug taper neck single-ellipse double-circle streamline curve to obtain a plug taper neck 7 of the single-ellipse double-circle streamline emitter.
As shown in fig. 6:
two mutually perpendicular axes with intersection points of A points are set in a plane where the second single-ellipse double-circular streamline curve 20 is located, wherein the horizontal axis is an X axis, the vertical axis is a Y axis, and the X axis is an XOY rectangular coordinate system, and the intersection points of the second single-ellipse double-circular streamline curve 20 and the XAY rectangular coordinate system are respectively defined as 1 ', 2', 3 'and 4'; wherein:
the second single-ellipse double-circle streamline curve 20 is a single-ellipse double-circle streamline curve formed by connecting the head and the tail of the water-facing section curve 1 '-2' -3 'and the flow-removing section curve 1' -4 '-3';
the curve 1 ' -2 ' -3 ' of the water-facing section is an elliptic curve;
the curve 1 ' -4 ' -3 ' of the defluidizing section is formed by connecting a circular curve 1 ' -4 ' and a circular curve 3 ' -4 '.
The equation of the curve 1 ' -2 ' -3 ' of the water-facing section is as follows:
a2y2+b2x2＝a2b2
where a is the ellipse major semi-axis, unit: mm; b is the ellipse minor semi-axis, unit: mm; the value range of a is as follows: a is more than or equal to 1 and less than or equal to 10; b is greater than or equal to 1 and less than or equal to 8; a is more than or equal to b; x is the abscissa of any point of the ellipse, and y is the ordinate of any point of the ellipse; -a ≦ x ≦ 0, -b ≦ y ≦ b.
The equation for the circular curve 1 '-4' is:
x2+(y+R-b)2＝R2
where b is the semi-axis of the minor axis of the ellipse, in units: mm; r is the circle radius, unit: mm, R value range is: r is more than or equal to 2 and less than or equal to 20; r > b; x is the abscissa of any point of the 1-4 circular equation, y is the ordinate of any point of the 1-4 circular equation, x is more than or equal to 0, and y is more than or equal to 0.
The equation for the circular curve 3 '-4' is:
x2+(y-R+b)2＝R2
where b is the minor semi-axis of the ellipse, unit: mm; r is the circle radius, unit: mm, R value range is: r is more than or equal to 2 and less than or equal to 20; r is more than b; x is the abscissa of any point of the 3-4 circular equation, y is the ordinate of any point of the 3-4 circular equation, x is more than or equal to 0, and y is less than or equal to 0.
The inner wall of the cavity shell 12 is provided with a supporting ring 13, the upper surface of the elastic gasket 5 is matched with the supporting ring 13, and a gasket hole of the elastic gasket 5 is communicated with the water inlet 2 of the water dropper through the supporting ring 13.
The pressure compensating flow passage 7 is opened from the center of the base 10 to the side wall of the base 10 and communicates with the labyrinth flow passage inlet 8 of the labyrinth flow passage 11.
The labyrinth flow passage 11 is a labyrinth flow passage in the form of a rectangular tooth flow passage, and the outlet of the labyrinth flow passage is communicated with the water outlet 15 of the dripper through the base outflow passage 9.
The elastic pad 5 used in the first and second embodiments is preferably an elastic pad made of silicone material.
EXAMPLE III
Figures 7 and 8 show the water flow streamline distribution near the streamlined emitter plug and the conical emitter plug, and it can be seen from figures 7 and 8 that the water flow distribution of the streamlined emitter plug is more uniform. The distribution difference of the two plugs at low speed regions is not obvious near the upstream surface of the plug, and the flow speed of the streamline-shaped douche plug is slightly smaller than that of the cone-shaped douche plug. The flow velocity distribution difference of the two plugs is obvious near the plug flow-out section, water flow is not separated from the side wall all the time after flowing through the streamline plug, and almost no low-speed vortex area appears near the plug flow-out section. For the conical emitter plug, after the water flow reaches the flow removal section, the water flow is separated from the side wall of the plug, and an obvious low-speed vortex region appears at the downstream of the flow removal section, so that the local head loss of the conical emitter plug is increased. FIGS. 9 and 10 show turbulence intensity distribution diagrams of water flows near the streamline-shaped emitter plug and the cone-shaped emitter plug, and it can be seen from FIGS. 9 and 10 that the cone-shaped emitter plug has stronger turbulence intensity and wider distribution range than the vicinity of the defluidizing section of the streamline-shaped emitter plug, the capillary water flow consumes more energy, and the local head loss of the drippers is larger.
In order to test the anti-blocking performance of the streamline dripper, two types of douches are arranged on a test platform to carry out short-period intermittent irrigation tests. Selecting natural dry soil, sieving with 200 mesh sieve to obtain sand sample with diameter less than 0.076mm, placing the sand sample into water, and preparing sand-containing water with concentration of 0.5g/L for irrigation test. The final emitter flow was measured and compared to the initial flow by 10 minutes per fill, 30 minutes off, 10 repetitions. The test results are shown in table 1, and the flow change of the invention is smaller than that of the conical insertion type pressure compensation irrigator from table 1, which shows that the invention has certain anti-blocking effect.
TABLE 1 comparison of anti-clogging performance of streamline inserted pressure compensation irrigator and conical inserted pressure compensation irrigator
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (4)
1. A streamlined plug-in pressure compensated emitter comprising an emitter plug (1) with a emitter water inlet (2), characterized in that: the lower part of the emitter plug (1) is sequentially connected with a cavity shell (12) and an outer water outlet cavity (16) from top to bottom, a base (10) is arranged in the cavity shell (12), a dripper cavity (14) is arranged between the upper surface of the base (10) and the cavity shell (12), an elastic gasket (5) is arranged in the dripper cavity (14), a gasket hole communicated with a compensation flow channel water inlet (6) is formed in the elastic gasket (5), a labyrinth flow channel (11) is arranged between the side surface of the base (10) and the inner wall of the cavity shell (12), and a dripper water inlet (2) is communicated with the labyrinth flow channel (11) through the gasket hole, the compensation flow channel water inlet (6) and a pressure compensation flow channel (7) formed in the base (10) and then communicated with a dripper water outlet (15) of the outer water outlet cavity (16);
the irrigator plug (1) comprises a plug inverted cone (3), and the lower part of the plug inverted cone (3) is connected with a plug taper neck (4);
the irrigator plug (1) is a single-ellipse double-polishing streamline irrigator plug or the irrigator plug (1) is a single-ellipse double-circle streamline irrigator plug;
when the irrigator plug (1) is a single-ellipse double-throw streamline irrigator plug, the cross section streamline of the plug inverted cone (3) and the plug taper neck (4) is a single-ellipse double-throw streamline curve, the water-facing section of the single-ellipse double-throw streamline curve is an elliptic curve, and the water-removing section of the single-ellipse double-throw streamline curve is formed by connecting two sections of parabola curves;
when the irrigator plug (1) is a single-ellipse double-circle streamline type irrigator plug, the cross section streamline of the plug inverted cone (3) and the plug taper neck (4) is a single-ellipse double-circle streamline type curve, the water-facing section of the single-ellipse double-circle streamline type curve is an elliptic curve, and the water-removing section of the single-ellipse double-circle streamline type curve is formed by connecting two sections of circular curves.
2. The streamlined inserted pressure compensating emitter of claim 1, wherein: the inner wall of the cavity shell (12) is provided with a support ring (13), the upper surface of the elastic gasket (5) is matched with the support ring (13), and a gasket hole of the elastic gasket (5) is communicated with the water inlet (2) of the dripper through the support ring (13).
3. The streamlined inserted pressure compensating emitter of claim 1, wherein: the pressure compensation flow channel (7) leads to the side wall of the base (10) from the center of the base (10) and is communicated with a labyrinth flow channel inlet (8) of the labyrinth flow channel (11).
4. The streamlined inserted pressure compensating emitter of claim 1, wherein: the labyrinth flow passage (11) is a labyrinth flow passage in a rectangular tooth shape, and the outlet of the labyrinth flow passage is communicated with the water outlet (15) of the dripper through the base outflow passage (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910755320.0A CN110367090B (en) | 2019-08-15 | 2019-08-15 | Streamline plug-in pressure compensation irrigator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910755320.0A CN110367090B (en) | 2019-08-15 | 2019-08-15 | Streamline plug-in pressure compensation irrigator |
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| CN115067183B (en) * | 2022-07-06 | 2023-03-10 | 中国农业科学院农业环境与可持续发展研究所 | Self-flushing variable irrigator and application thereof |
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| CN2773420Y (en) * | 2004-12-27 | 2006-04-19 | 上海上龙阀门厂 | Valve clack with guiding cap |
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| CN102527532B (en) * | 2012-01-11 | 2014-05-14 | 西北农林科技大学 | High-flow pressure-compensated drip irrigation emitter |
| KR101962256B1 (en) * | 2017-08-28 | 2019-03-26 | 주식회사 남경 | Drip emitter |
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| CN2484738Y (en) * | 2001-06-19 | 2002-04-10 | 郑耀泉 | Multi-opening shunt device with pressure compensation |
| CN2773420Y (en) * | 2004-12-27 | 2006-04-19 | 上海上龙阀门厂 | Valve clack with guiding cap |
| CN201292996Y (en) * | 2008-11-18 | 2009-08-19 | 河南省电力勘测设计院 | Diversion pier |
| CN202374798U (en) * | 2011-12-14 | 2012-08-15 | 杭州奥特普灌溉设备有限公司 | Pressure compensation type emitter |
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