CN109673482B - Drip irrigation emitter and drip irrigation belt - Google Patents
Drip irrigation emitter and drip irrigation belt Download PDFInfo
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- CN109673482B CN109673482B CN201910145054.XA CN201910145054A CN109673482B CN 109673482 B CN109673482 B CN 109673482B CN 201910145054 A CN201910145054 A CN 201910145054A CN 109673482 B CN109673482 B CN 109673482B
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- 238000003973 irrigation Methods 0.000 title claims abstract description 116
- 230000002262 irrigation Effects 0.000 title claims abstract description 116
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 178
- 238000003860 storage Methods 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 8
- 230000007704 transition Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
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- 230000010349 pulsation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000003621 irrigation water Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 239000004698 Polyethylene Substances 0.000 description 1
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Classifications
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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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- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Environmental Sciences (AREA)
- Nozzles (AREA)
Abstract
The embodiment of the application provides a drip irrigation emitter and drip irrigation zone, relates to drip irrigation equipment technical field. The drip emitter includes a drip body including oppositely disposed first and second faces. The arc bend has been seted up to first face, and the same edge of drip irrigation main part is extended to the both ends of arc bend, and the arc bend is by the first installation department that has first cambered surface and the second installation department interval setting that has the second cambered surface form, and first cambered surface and second cambered surface are protruding towards same direction, and when rivers flow along the arc extension direction of arc bend, the velocity of water flow through first cambered surface is greater than the velocity of water flow through the second cambered surface. The second surface is provided with a window groove, a runner structure and a water storage groove, a water inlet of the runner structure is communicated with the window groove, and a water outlet of the runner structure is communicated with the water storage groove. The drip irrigation main body is also provided with a water inlet window communicated with the arc-shaped bend and the window groove, and the water inlet window is arranged close to the first cambered surface. The drip irrigation emitter has better anti-blocking performance.
Description
Technical Field
The application relates to the technical field of drip irrigation equipment, in particular to a drip irrigation emitter and a drip irrigation zone.
Background
Drip emitters are one of the most critical components of a drip irrigation system, and are used for forming head loss, and pressure water flows enter the drip emitters to dissipate energy, so that the pressure water flows are stably and uniformly dripped into soil at low flow rate. The water outlet flow of the drip irrigation emitter is very small, the flow of a single drip irrigation emitter is generally only 1-8L/h, the structural parameter size of the flow channel inside the drip emitter and the water outlet hole are very small, and the size of the water outlet hole is generally only about 0.7-1.1mm, so that the drip irrigation emitter is very easy to be blocked by physical particles entering the flow channel. The quality of the anti-blocking performance of the emitter has a great influence on the irrigation uniformity of the drip irrigation system and the service life of the system.
Disclosure of Invention
An aim of the embodiment of the application is to provide a drip irrigation emitter and drip irrigation zone, and aims to solve the problem that the existing drip irrigation emitter is easy to be blocked.
In a first aspect, embodiments of the present application provide a drip emitter comprising a drip emitter body including oppositely disposed first and second faces. The arc bend has been seted up to first face, and the same edge of drip irrigation main part is extended to the both ends of arc bend, and the arc bend is by the first installation department that has first cambered surface and the second installation department interval setting that has the second cambered surface form, and first cambered surface and second cambered surface are protruding towards same direction, and when rivers flow along the arc extension direction of arc bend, the velocity of water flow through first cambered surface is greater than the velocity of water flow through the second cambered surface. The second surface is provided with a window groove, a runner structure and a water storage groove, a water inlet of the runner structure is communicated with the window groove, and a water outlet of the runner structure is communicated with the water storage groove. The drip irrigation main body is also provided with a water inlet window communicated with the arc-shaped bend and the window groove, and the water inlet window is arranged close to the first cambered surface.
In the above implementation process, when the water flow passes through the arc bend, the water flow flows along the arc extending direction of the arc bend, and due to the inertia effect, the water flow generates centrifugal force in the arc bend, and the centrifugal force of the water flow passing through the first cambered surface is larger than that of the water flow passing through the second cambered surface, namely, the water flow speed passing through the first cambered surface is larger than that passing through the second cambered surface, which means that the sand carrying capacity of the water flow passing through the first cambered surface is stronger. The water inlet window is the only channel communicated with the flow channel structure and the arc bend, and because the water inlet window is close to the first cambered surface, and the sand carrying capacity of the water flow passing through the first cambered surface is strong, the probability of sand sedimentation and entering the water inlet window is reduced, so that the probability of sand entering the flow channel structure is reduced, and the anti-blocking performance of the drip irrigation emitter is improved.
In one possible embodiment, the flow channel structure is composed of a plurality of flow sections, each flow section is tooth-shaped, each flow section comprises a first straight line section, a second straight line section and a third straight line section which are sequentially communicated along the water flow direction, the axes of the first straight line section and the second straight line section are vertically arranged, the third straight line section and the axis of the second straight line section form an acute angle, the joint of the first straight line section and the second straight line section is an arc transition structure, and the joint of the second straight line section and the third straight line section is an arc transition structure.
In the implementation process, the flow passage structure increases the area of the low-speed area and improves the minimum turbulent energy value of the low-speed area, so that the fluid speed of the low-speed area passing through the flow passage structure is increased, sand accumulation and blockage are not easy to occur, and the anti-blockage performance of the drip irrigation emitter is obviously improved.
In one possible embodiment, the ratio of tooth height, tooth bottom spacing, tooth spacing, base angle arc length and base angle radius of the flow channel structure is 0.8-1:0.85-1.05:1.3-1.6:0.28-0.35: the tooth bottom angle beta of each flow section is 115-120 degrees and is 0.15-0.2.
In the implementation process, the flow channel structure is determined by tooth height h, tooth bottom distance a, tooth bottom angle beta, bottom angle radius r, bottom angle arc length b and tooth distance c, and the range of turbulent energy in the low-speed area of the flow channel structure in the scheme is 0.404-1.438 m 2 s -2 Compared with the minimum turbulent energy of the arc tooth type flow channel structure, the minimum turbulent energy of the arc tooth type flow channel structure is greatly increased, so that the anti-blocking performance of the drip irrigation emitter is improved.
In one possible embodiment, the flow channel structure is composed of a plurality of flow channels which are arranged in parallel and communicated in sequence, each flow channel comprises a water inlet end and a water outlet end which are oppositely arranged, and the water inlet ends and the water outlet ends of two flow channels which are adjacently arranged are arranged on the same side of the flow channel structure.
In the implementation process, the flow path of water flow can be increased through the flow channel structure, the energy dissipation effect of the water flow is more obvious, and the accumulation and blockage of the granulating are less likely to happen.
In one possible embodiment, two flow channels adjacently arranged are connected by an arc segment, the direction of the water inlet end pointing to the water outlet end is a preset direction, and the arc segment protrudes along the preset direction.
In the implementation process, when water flows through the water outlet end of the flow channel to the water inlet end of the adjacent flow channel, the water needs to pass through the arc section, and the arc section is beneficial to the flow of water flow and avoids the deposition of sand grains.
In one possible embodiment, the water inlet window includes a plurality of water inlet channels spaced along an edge of the first arcuate surface.
In the implementation process, water flow is convenient to enter the window groove through the plurality of water inlet channels.
In one possible embodiment, the radii of the arcs of the first and second arcs are equal, or the center of the first arc is the same as the center of the second arc.
In the implementation process, the arc bend formed by the first cambered surface and the second cambered surface with the same arc radius and the arc bend formed by the first cambered surface and the second cambered surface with the same circle center can reduce sand deposition and reduce the probability of sand entering the water inlet window.
In one possible embodiment, the two ends of the curved bend extend to a first edge of the drip irrigation body, the second mounting portion has a second edge disposed on the same side of the first face as the first edge, a gap is provided between the second edge and the first edge to form a mounting slot for mating with a snap-fit of a mounting device to mount the drip emitter.
In the implementation process, the clamping piece of the mounting equipment is clamped with the mounting groove of the drip irrigation emitter, and the drip irrigation emitter can be conveyed and mounted.
In one possible embodiment, the first face is provided with a jacking hole, which is a blind hole.
In the implementation process, when the formed drip irrigation emitter is required to be taken out of the die, the drip irrigation emitter is supported in the jacking hole by the support rod, and the drip irrigation emitter is taken out.
In a second aspect, the embodiment of the application provides a drip tape, including drip irrigation pipe and foretell drip irrigation emitter, drip irrigation emitter installs in the inside of drip irrigation pipe, and the inner wall sealing connection of second face and drip irrigation pipe, and the through-hole has been seted up to the position that the drip irrigation pipe corresponds the catch basin, and the through-hole is used for arranging the water in the catch basin to the external world.
In the implementation process, when irrigation water in the drip irrigation pipe passes through the arc-shaped bend on the first surface of the drip irrigation emitter at a certain speed, the water flow speed passing through the water inlet window is high, and sand carrying capacity is high, so that the probability that sand grains deposit and enter the drip irrigation main body is reduced, and the possibility of blocking the drip irrigation emitter is reduced. After the water flow enters the water inlet window, the window groove on the second surface is communicated with the water inlet window, so that the water flow and sand grains passing through the water inlet window can enter the window groove and reach the flow channel structure, enter the water storage groove through the water outlet of the flow channel structure and drop into the field from the through hole.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a drip irrigation emitter according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of the first side of the drip emitter of FIG. 1;
FIG. 3 is a schematic view of the structure of the second face of the drip emitter of FIG. 1;
FIG. 4 is a schematic view of a portion of the flow channel structure of FIG. 3;
FIG. 5 is a schematic view of a portion of the flow channel structure of FIG. 3;
FIG. 6 is a flow turbulence energy diagram of a flow channel structure according to an embodiment of the present disclosure;
FIG. 7 is a simulated motion profile of a single grit in a conventional arcuate toothed flow channel structure;
FIG. 8 is a simulated motion profile of a flow channel structure provided by an embodiment of the present application for a single grit.
Icon: 100-drip irrigation emitter; 110-a drip irrigation body; 101-a first side; 102-a second side; 103—a first edge; 111-arc curve; 12-a first mounting portion; 121-a first cambered surface; 13-a second mounting portion; 131-a second cambered surface; 132-a second edge; 14-window slots; 15-a runner structure; 151-a first line segment; 152-a second straight line segment; 153-third straight line segment; 150-flow channels; 1501-a water inlet end; 1502-water outlet end; 1503-arc segment; 16-a water storage tank; 17-a water inlet window; 171-a water inlet channel; 18-mounting slots; 19-jacking holes.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "left," "right," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or a third "may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally formed, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Applicant has found in research on improving anti-clogging performance of drip emitters that the stagnant zone of flow (low velocity zone) is a direct cause of emitter clogging. Some studies have taken the basic idea of eliminating swirl and stagnation areas in the flow channels, in which no swirl is present, all of the flow channels are the main flow areas, but the swirl is not without any effect. The role of swirl is two: first, the vortex can increase the energy consumption in the flow channel; second, the vortex is the source of the lifting force of the sand inside the flow channel. The fluid in the labyrinth flow channel is turbulent, the force acting on the particles is changed frequently due to the pulsation property of the turbulent flow, and the particles continuously rotate and subside in the vortex instead of stably sinking beyond a certain direction due to the rotation action of the vortex; meanwhile, the speed and the direction of turbulent flow pulsation are continuously changed, so that the stress of the particles is continuously changed, and acceleration and deceleration processes are formed due to the stress when the particles sink. Therefore, it is sometimes necessary to increase the turbulence level to prevent precipitation, rather than completely eliminate the vortex. Other studies have suggested that vortices may be used to prevent sedimentation, allowing the vortices to move from the inlet to the outlet, bringing sand directly out of the flow path.
Based on this, the embodiment of the present application provides a drip irrigation emitter 100, which aims to solve the problem that the existing drip irrigation emitter 100 is easily blocked.
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a drip emitter 100 according to an embodiment of the present application. The drip emitter 100 includes a drip body 110, and the drip body 110 is illustratively generally rectangular parallelepiped-shaped. It is understood that the outer shape of the drip irrigation body 110 may be configured in other shapes, such as an elongated shape, a trapezoid shape, etc., and the outer shape of the drip irrigation body 110 is not particularly limited in the embodiments of the present application.
The drip irrigation body 110 includes oppositely disposed first and second faces 101, 102. Referring to fig. 1 and 2, the first surface 101 is provided with an arc bend 111, and two ends of the arc bend 111 extend to the same edge of the drip irrigation body 110. That is, as shown in fig. 2, both ends of the curved bend 111 extend to the first edge 103 of the drip irrigation body 110, and the first edge 103 is the bottom edge of the drip irrigation body 110. The curved bend 111 is formed by a first mounting portion 12 having a first curved surface 121 and a second mounting portion 13 having a second curved surface 131 being arranged at intervals, as shown in fig. 2, wherein the first mounting portion 12 is arranged above the second mounting portion 13, and the first curved surface 121 and the second curved surface 131 together define the curved bend 111. The first and second arc surfaces 121 and 131 are convex in the same direction, and as shown in fig. 2, the first and second arc surfaces 121 and 131 are convex toward the top end of the drip irrigation body 110.
As can be seen from river curve theory, when the water flow passes through the arc curve 111, the water flow flows along the arc extending direction of the arc curve 111, and due to the inertia effect, the water flow generates a centrifugal force in the arc curve 111, the first arc surface 121 is an outer arc relative to the second arc surface 131, and the centrifugal force of the water flow passing through the outer arc surface (i.e. the first arc surface 121) is greater than that of the water flow passing through the second arc surface 131. The flow velocity and sand content of the water flow in the arc bend 111 are unevenly distributed due to the action of the centrifugal force, and the flow velocity of the water flow passing through the first cambered surface 121 is greater than the flow velocity of the water flow passing through the second cambered surface 131, namely, the sand carrying capacity of the water flow passing through the first cambered surface 121 is stronger. In one possible embodiment, the arc radii of the first arc 121 and the second arc 131 are equal. In one possible embodiment, the center of the first arc surface 121 is the same as the center of the second arc surface 131, that is, the center of the first arc surface 121 and the center of the second arc surface 131 are the same. Illustratively, the arc radii of the first arc surface 121 and the second arc surface 131 are 30 to 45mm.
Referring to fig. 1 and 3, the second surface 102 is provided with a window groove 14, a flow channel structure 15 and a water storage groove 16, a water inlet of the flow channel structure 15 is communicated with the window groove 14, and a water outlet of the flow channel structure 15 is communicated with the water storage groove 16. Illustratively, the window channel 14 is disposed along the length of the drip irrigation body 110 and the reservoir 16 is disposed at the left end of the second face 102. The drip irrigation main body 110 is further provided with a water inlet window 17 communicated with the arc-shaped bend 111 and the window groove 14, and the water inlet window 17 is arranged close to the first cambered surface 121.
The water inlet window 17 is the only channel for communicating the flow channel structure 15 and the arc bend 111, and because the water inlet window 17 is close to the first cambered surface 121 and the sand carrying capacity of the water flow passing through the first cambered surface 121 is strong, the probability of sand sedimentation and entering the water inlet window 17 is reduced, thereby reducing the probability of sand entering the flow channel structure 15 and improving the anti-blocking performance of the drip irrigation emitter 100. Illustratively, the water inlet window 17 includes a plurality of water inlet channels 171, the plurality of water inlet channels 171 being spaced along an edge of the first arc 121. Water flow into the window slots 14 is facilitated by a plurality of water inlet channels 171. It should be noted that, the plurality of water inlet channels 171 herein refers to two or more water inlet channels 171, and when two or more water inlet channels 171 are provided, the plurality of water inlet channels 171 are uniformly distributed at intervals. It is understood that only one water inlet channel 171 may be provided. In the present embodiment, 6 to 20 water inlet channels 171 are provided, the water inlet channels 171 are elongated, the length of the water inlet channels 171 (the width direction of the drip irrigation body 110) is 0.67 to 0.85mm, and the width (the length direction of the drip irrigation body 110) is 0.38 to 0.5mm.
The water flow passes through the arc-shaped bend 111 at a certain speed, and the speed of the water flow passing through the first arc-shaped surface 121 is higher, that is, the water flow passing through the water inlet window 17 is higher, the sand carrying capacity is stronger, and the probability of sand sedimentation and entering the flow channel structure 15 is reduced. The water flow enters the window groove 14 through the water inlet window 17, the window groove 14 is communicated with the runner structure 15, and then the water flow enters the runner structure 15 through the window groove 14 and then flows to the water storage groove 16.
When the drip irrigation emitter 100 is specifically used, the drip irrigation emitter 100 is installed into a drip irrigation pipe through a drip irrigation belt production line, and the second face 102 of the drip irrigation emitter 100 is adhered to the inner pipe wall of the drip irrigation pipe in a hot-melting patch mode, so that the sealing combination of the second face 102 of the drip irrigation emitter 100 and the pipe wall of the drip irrigation pipe is ensured. And the drip irrigation pipe is perforated at the corresponding position of the water storage groove 16 by the perforating device to obtain a through hole, the through hole is communicated with the water storage groove 16 and the outside, and water flowing to the water storage groove 16 through the flow passage structure 15 is dripped into the field through the through hole, so that the field crops are drip-irrigated. Illustratively, the drip irrigation pipe is a plastic material, such as polyethylene or polypropylene, or the like.
Further, referring to fig. 1 and 2, the second mounting portion 13 has a second edge 132, the second edge 132 and the first edge 103 are disposed on the same side of the first surface 101, that is, on the bottom side of the first surface 101, and a gap is formed between the second edge 132 and the first edge 103 to form a mounting groove 18, and the mounting groove 18 is used to cooperate with a clamping member of a mounting device to mount the drip emitter 100.
Illustratively, the first edge 103 of the drip irrigation body 110 is disposed straight and the second edge 132 of the second mounting portion 13 is also disposed straight. In use, the mounting device's clip engages the mounting groove 18 of the drip emitter 100, and the drip emitter 100 can be transported and mounted.
In addition, the drip emitter 100 of the present embodiment is processed by a mold, in order to facilitate taking out the formed drip emitter 100 from the mold, the first surface 101 of the drip emitter 100 is provided with a top supporting hole 19, and the top supporting hole 19 is a blind hole, that is, the top supporting hole 19 is not communicated with the first surface 101 and the second surface 102. When the formed drip emitter 100 is required to be taken out of the die, the drip emitter 100 is taken out by being supported in the jacking holes 19 by the support rods. Illustratively, the plurality of top supporting holes 19 of the present embodiment are provided, and the plurality of top supporting holes 19 are uniformly spaced along the length direction of the drip irrigation main body 110, so that the drip irrigation main body 110 is uniformly stressed, and the structural integrity of the drip irrigation emitter 100 is ensured. Illustratively, the jacking apertures 19 are cylindrical or conical in shape.
In one possible embodiment, the flow channel structure 15 is formed by a plurality of flow segments, referring to fig. 3 to 5, the flow segments are sequentially communicated, each flow segment is tooth-shaped, each flow segment includes a first straight line segment 151, a second straight line segment 152 and a third straight line segment 153 that are sequentially communicated along the water flow direction, the axes of the first straight line segment 151 and the second straight line segment 152 are vertically arranged, the third straight line segment 153 forms an acute angle with the axis of the second straight line segment 152, the connection part of the first straight line segment 151 and the second straight line segment 152 is an arc-shaped transition structure, and the connection part of the second straight line segment 152 and the third straight line segment 153 is an arc-shaped transition structure. In addition, the third straight line 153 of the flow section and the first straight line 151 of the adjacent flow section are also arc-shaped transition structures.
The area of the low-speed area a is increased (compared with an arc tooth type flow passage structure) by the flow passage structure 15, and the minimum turbulence energy value of the low-speed area a is improved, so that more energy is extracted from the time-sharing flow of the fluid in the low-speed area a of the flow passage structure 15, the speed is increased, sand grains are less likely to be accumulated and blocked, and the anti-blocking performance of the drip irrigation emitter 100 is obviously improved.
With continued reference to fig. 3, in one possible embodiment, the flow channel structure 15 is composed of a plurality of flow channels 150 arranged in parallel and sequentially connected, each flow channel 150 includes a water inlet end 1501 and a water outlet end 1502 arranged opposite to each other, and the water inlet ends 1501 and the water outlet ends 1502 of the two flow channels 150 arranged adjacently are arranged on the same side of the flow channel structure 15. That is, along the direction in which the top end of the flow channel structure 15 points to the bottom end, the water inlet end 1501 of the first flow channel is on the same side (on the left side of the drip irrigation body 110) as the water outlet end 1502 of the second flow channel, the water inlet end 1501 of the second flow channel is on the same side (on the right side of the drip irrigation body 110) as the water outlet end 1502 of the third flow channel, and so on. Such a flow channel structure 15 can increase the flow path of the water flow, and the energy dissipation effect of the water flow is more obvious and the accumulation and blockage of the particles are less likely to happen. It is understood that only one flow channel 150 may be provided in the flow channel structure 15.
Further, two flow channels 150 adjacently arranged are connected through a circular arc section 1503, the direction in which the water inlet end 1501 points to the water outlet end 1502 is a preset direction, and the circular arc section 1503 protrudes along the preset direction. The two flow channels 150 are connected through the circular arc section 1503, and the circular arc section 1503 protrudes along the direction of the water inlet end 1501 pointing to the water outlet end 1502, so that water needs to pass through the circular arc section 1503 when flowing through the water outlet end 1502 of the flow channel 150 to the water inlet end 1501 of the adjacent flow channel 150, the circular arc section 1503 is beneficial to the flowing of the water flow, and sand sedimentation is avoided.
In this embodiment, two flow channels 150 are disposed in parallel, along the direction of the top end of the flow channel structure 15 pointing to the bottom end, the water inlet end 1501 of the first flow channel is located at the left side of the drip irrigation main body 110, the water outlet end 1502 of the first flow channel is located at the right side of the drip irrigation main body 110, and the water inlet of the first flow channel is communicated with the window slot 14. The water outlet 1502 of the first flow channel is connected to the water inlet 1501 of the second flow channel by a circular arc segment 1503, the circular arc segment 1503 projects toward the right end of the drip irrigation body 110, the water inlet 1501 of the second flow channel is also disposed on the right side of the drip irrigation body 110, the water outlet 1502 of the second flow channel is disposed on the left side of the drip irrigation body 110, and the water outlet 1502 of the second flow channel has a water outlet which is connected to the water reservoir 16.
In addition, referring to fig. 5, the flow channel structure 15 of the present embodiment is determined by tooth height h, tooth bottom distance a, tooth bottom angle β, bottom angle radius r, bottom angle arc length b and tooth pitch c. Illustratively, the ratio of tooth height h, tooth bottom distance a, tooth distance c, base angle arc length b, and base angle radius r of the runner structure 15 is 0.8-1:0.85-1.05:1.3-1.6:0.28-0.35: the tooth bottom angle beta of each flow section is 115-120 degrees and is 0.15-0.2. Illustratively, the tooth height h is 0.8-1.0 mm, the tooth bottom distance a is 0.85-1.05 mm, the base angle radius r is 0.15-0.2 mm, the base angle arc length b is 0.28-0.35 mm, and the tooth distance c is 1.3-1.6 mm.
Referring to fig. 6, fig. 6 is a flow turbulence energy diagram of the flow channel structure 15 (in the case of two flow channels 150), and it can be seen from the diagram that the turbulence energy in the low-speed region a of the flow channel structure 15 of the present embodiment ranges from 0.404 m to 1.438m 2 ·s -2 Compared with the existing arc tooth type runner structure, the structure is improved by 52% -200% at the highest. And the turbulence energy in the low-speed area A is uniformly distributed, and when sand grains enter the low-speed area A, the sand grains can move under the carrying action of turbulence, so that deposition is not easy to form.
The applicant has analyzed and simulated the motion trail of a single sand grain in the existing arc tooth type flow channel structure and the flow channel structure 15 of the application by a numerical simulation means, and the results are shown in fig. 7 and 8 respectively, wherein different colors represent different residence times, and red represents longer residence time. The number of turnover turns after sand particles enter the low-speed area in the arc tooth type runner structure is more, the migration time of the sand particles in the runner structure is certainly increased, and the blocking probability of the douche is increased. This is also demonstrated from fig. 7, where the migration time of sand in the low velocity zone is red and yellow, demonstrating that the scalloped flow path structure increases the migration time of sand within the flow path structure, increasing the chance of clogging the emitter. As can be seen from fig. 8, the sand particles completely enter the low-speed region a only 1 time in the flow channel structure 15 in the embodiment of the present application, and escape from the vortex region after one cycle of irregular movement, and the path length of the sand particle track of the arc tooth type flow channel structure is further reduced, which indicates that the flow channel structure 15 in the embodiment is favorable for separating the sand particles from the vortex region, and greatly improves the anti-blocking performance of the drip irrigation emitter 100.
The embodiment also provides a drip tape, which comprises a drip irrigation pipe and the drip irrigation emitter 100, wherein the drip irrigation emitter 100 is arranged inside the drip irrigation pipe, the second surface 102 is in sealing connection with the inner wall of the drip irrigation pipe, the drip irrigation pipe is provided with a through hole corresponding to the position of the water storage groove 16, and the through hole is used for discharging water in the water storage groove 16 to the outside.
In a specific implementation, the drip irrigation emitter 100 is installed into a drip irrigation pipe through a drip irrigation belt production line, and the second face 102 of the drip irrigation emitter 100 is adhered to the inner pipe wall of the drip irrigation pipe in a hot-melt patch mode, so that the sealing combination of the second face 102 of the drip irrigation emitter 100 and the pipe wall of the drip irrigation pipe is ensured. The drip irrigation pipe is perforated by a perforating device at a position corresponding to the water storage tank 16 to obtain a through hole, and the through hole communicates the water storage tank 16 with the outside, thereby completing the installation of the drip irrigation emitter 100. In actual irrigation engineering, when irrigation water in the drip irrigation pipe passes through the arc-shaped bend 111 of the first face 101 of the drip irrigation emitter 100 at a certain speed, the water flow speed passing through the first arc-shaped face 121 is high, that is, the water flow speed passing through the water inlet window 17 is high, sand carrying capacity is high, so that the probability of sand sedimentation and entering the drip irrigation main body 110 is reduced, and the possibility of blockage of the drip irrigation emitter 100 is reduced. If sand particles carried in the water flow enter the water inlet window 17 along with the water flow, because the window grooves 14 of the second surface 102 and the water inlet window 17 of the first surface 101 are communicated with each other, the water flow and sand particles passing through the water inlet window 17 enter the window grooves 14 and reach the flow channel structure 15, and the sand particles do irregular curve motion along with the water flow in the flow channel structure 15. The flow velocity of water in the main flow area is high, and sand grains are not easy to deposit to form sediment; after sand enters the low-speed area, the flow channel structure 15 increases the turbulence energy value of the low-speed area, ensures that the sand entering the low-speed area can move at a high speed, is not easy to form sediment in the low-speed area, and finally enters the main flow area along with the continuous change of the speed and the direction of turbulence pulsation of the low-speed area, enters the water storage tank 16 through the water outlet and is dripped into the field from the through hole. The drip irrigation emitter 100 of the embodiment of the present application improves the anti-clogging performance of the drip irrigation emitter 100 through the action of the arc-shaped bend 111 and the flow channel structure 15.
The foregoing description of the exemplary embodiments of the invention is merely illustrative of the invention and is not intended to be limiting, since various modifications and changes in the invention will occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A drip emitter, comprising a drip body including oppositely disposed first and second faces;
the first surface is provided with an arc bend, two ends of the arc bend extend to the same edge of the drip irrigation main body, the arc bend is formed by arranging a first installation part with a first cambered surface and a second installation part with a second cambered surface at intervals, the first cambered surface and the second cambered surface are convex towards the same direction, and when water flows along the arc extending direction of the arc bend, the water flow speed passing through the first cambered surface is higher than the water flow speed passing through the second cambered surface;
the second surface is provided with a window groove, a runner structure and a water storage groove, a water inlet of the runner structure is communicated with the window groove, and a water outlet of the runner structure is communicated with the water storage groove;
the drip irrigation main body is also provided with a water inlet window communicated with the arc-shaped bend and the window groove, and the water inlet window is arranged close to the first cambered surface;
the flow channel structure consists of a plurality of flow sections, each flow section is tooth-shaped, each flow section comprises a first straight line section, a second straight line section and a third straight line section which are sequentially communicated along the water flow direction, the axes of the first straight line section and the second straight line section are vertically arranged, the third straight line section and the axis of the second straight line section form an acute angle, the joint of the first straight line section and the second straight line section is of an arc transition structure, and the joint of the second straight line section and the third straight line section is of an arc transition structure;
the ratio of tooth height, tooth bottom distance, tooth distance, base angle arc length and base angle radius of the flow channel structure is 0.8-1:0.85-1.05:1.3-1.6:0.28-0.35: 0.15-0.2, wherein the tooth bottom angle beta of each flow section is 115-120 degrees;
the flow channel structure consists of a plurality of flow channels which are arranged in parallel and are communicated in sequence, each flow channel comprises a water inlet end and a water outlet end which are oppositely arranged, and the water inlet ends and the water outlet ends of two adjacent flow channels are arranged on the same side of the flow channel structure;
two flow channels which are adjacently arranged are connected through an arc section, the direction of the water inlet end pointing to the water outlet end is a preset direction, and the arc section protrudes along the preset direction;
the both ends of arc bend extend to the first edge of drip irrigation main part, the second installation department has the second edge, the second edge with first edge sets up the same side of first face, the second edge with have the clearance between the first edge in order to form the mounting groove, the mounting groove is used for cooperating with the joint spare of erection equipment in order to install drip irrigation emitter.
2. The drip emitter of claim 1, wherein the water inlet window includes a plurality of water inlet channels spaced along an edge of the first arcuate surface.
3. The drip emitter of claim 1, wherein the first and second arcuate surfaces have equal arc radii or the first arcuate surface has a center that is the same as the center of the second arcuate surface.
4. The drip emitter of claim 1, wherein said first face is provided with a jacking hole, said jacking hole being a blind hole.
5. The drip irrigation tape is characterized by comprising a drip irrigation pipe and the drip irrigation emitter according to any one of claims 1-4, wherein the drip irrigation emitter is arranged inside the drip irrigation pipe, the second surface is in sealing connection with the inner wall of the drip irrigation pipe, a through hole is formed in the position, corresponding to the water storage groove, of the drip irrigation pipe, and the through hole is used for discharging water in the water storage groove to the outside.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910145054.XA CN109673482B (en) | 2019-02-26 | 2019-02-26 | Drip irrigation emitter and drip irrigation belt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910145054.XA CN109673482B (en) | 2019-02-26 | 2019-02-26 | Drip irrigation emitter and drip irrigation belt |
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| CN109673482A CN109673482A (en) | 2019-04-26 |
| CN109673482B true CN109673482B (en) | 2024-02-23 |
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| CN201910145054.XA Active CN109673482B (en) | 2019-02-26 | 2019-02-26 | Drip irrigation emitter and drip irrigation belt |
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| CN112931157B (en) * | 2021-03-09 | 2022-04-01 | 石河子大学 | Drip irrigation emitter and drip irrigation system |
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| CN102577912A (en) * | 2012-03-21 | 2012-07-18 | 江苏大学 | Special-shaped streaming trickle irrigation device |
| CN103651053A (en) * | 2013-12-12 | 2014-03-26 | 中国农业大学 | Small high-blocking-resistant drip irrigation emitter |
| CN104488665A (en) * | 2014-12-08 | 2015-04-08 | 西安交通大学 | Karman vortex street shaped runner and drip irrigation emitter comprising same |
| CN205922306U (en) * | 2016-08-24 | 2017-02-08 | 陕西杨凌锦川管业科技有限公司 | A built -in type paster runner for drip irrigation |
| CN205922307U (en) * | 2016-08-24 | 2017-02-08 | 陕西杨凌锦川管业科技有限公司 | Built -in type paster runner drip emitter |
| CN209660107U (en) * | 2019-02-26 | 2019-11-22 | 中国农业科学院农业环境与可持续发展研究所 | A kind of drip emitter and drip irrigation zone |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10631473B2 (en) * | 2013-08-12 | 2020-04-28 | Rain Bird Corporation | Elastomeric emitter and methods relating to same |
| WO2018140772A1 (en) * | 2017-01-27 | 2018-08-02 | Rain Bird Corporation | Pressure compensation members, emitters, drip line and methods relating to same |
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2019
- 2019-02-26 CN CN201910145054.XA patent/CN109673482B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102577912A (en) * | 2012-03-21 | 2012-07-18 | 江苏大学 | Special-shaped streaming trickle irrigation device |
| CN103651053A (en) * | 2013-12-12 | 2014-03-26 | 中国农业大学 | Small high-blocking-resistant drip irrigation emitter |
| CN104488665A (en) * | 2014-12-08 | 2015-04-08 | 西安交通大学 | Karman vortex street shaped runner and drip irrigation emitter comprising same |
| CN205922306U (en) * | 2016-08-24 | 2017-02-08 | 陕西杨凌锦川管业科技有限公司 | A built -in type paster runner for drip irrigation |
| CN205922307U (en) * | 2016-08-24 | 2017-02-08 | 陕西杨凌锦川管业科技有限公司 | Built -in type paster runner drip emitter |
| CN209660107U (en) * | 2019-02-26 | 2019-11-22 | 中国农业科学院农业环境与可持续发展研究所 | A kind of drip emitter and drip irrigation zone |
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| CN109673482A (en) | 2019-04-26 |
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Effective date of registration: 20240108 Address after: 102, Building 14, Zone 2, Zhonghai No. 9 Mansion, No. 98 Fengbao Road, Fengtai District, Beijing, 100841 Applicant after: BEIJING NEW WATER TECHNOLOGY Co.,Ltd. Address before: 100000 No. 12 South Main Street, Haidian District, Beijing, Zhongguancun Applicant before: INSTITUTE OF ENVIRONMENT AND SUSTAINABLE DEVELOPMENT IN AGRICULTURE, CHINESE ACADEMY OF AGRICULTURAL SCIENCES |
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