CN105359932A - Emitter channel structure - Google Patents
Emitter channel structure Download PDFInfo
- Publication number
- CN105359932A CN105359932A CN201510537839.3A CN201510537839A CN105359932A CN 105359932 A CN105359932 A CN 105359932A CN 201510537839 A CN201510537839 A CN 201510537839A CN 105359932 A CN105359932 A CN 105359932A
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- CN
- China
- Prior art keywords
- flow
- channel
- runner
- emitter
- channel structure
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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
Abstract
Provided is an emitter channel structure, comprising a water inlet, a water outlet, and a channel. The water inlet and the water outlet are respectively arranged on two ends of the channel. The channel is internally distributed with a plurality of tetrahedral columns. Netted channels are formed among the tetrahedral columns. Liquid impacts intersections of different branches in the channel, and energy is consumed. Since the longitudinal section of the channel is provided with flowing channels which have characteristics of abrupt expansion and abrupt contraction and flowing-around, and form sudden contraction, sudden expansion, and flowing around the columns, overhasty variation occurs to boundary layer flow, to promote the boundary layer flow to separate from a boundary, and a separation point is formed. Under the separation point, flow separates from the boundary, and forms a flow zone with no dependence. One side of the flow zone is positive flow, and the other side is closed circulation. The circulation formed by separation of the flow and the boundary can drive sediment and other substances, and relieves a blocking problem, meanwhile the circulation impacts the boundary of the channel, and head loss is increased, thereby having efficient energy dissipation effect and being beneficial for reducing flow stance index of an emitter. Drip is more uniform.
Description
Technical field
The present invention relates to the technical field of soil irrigation, is a kind of emitter flow channel structure specifically.
Background technology
Drip irrigation is one of internationally recognized a kind of efficient water-saving irrigation technology, has significantly to pour water evenly, high-efficiency water-saving joint fertilizer, increasing both production and income, be convenient to the advantages such as management, by countries in the world extensive use.Water dropper is the core component of drip irrigation technique, whether water dropper design rationally determines the service life of the quality of drip irrigation, management cost and drip irrigation system, the key technology of water dropper design makes pressure flow pass through inner runner energy dissipating, makes waterflow stabilization, instills soil uniformly.The factor such as structure, size of runner determines it and goes out to flow the hydraulic performance such as stability, anti-stifled ability.The structure of existing drip irrigation emitter runner is mostly based on the runner of various tooth-shape structure form, improves, then develop the drip irrigation emitter based on flow path of gear profile to the version, specification etc. of domestic and international existing runner.Emitter flow channel version presents the situation of the flow path of gear profile of single-mode substantially, constrains the diversification development and application of drip irrigation emitter product, is difficult to the development of adaptation drip irrigation technique and applies.
In addition, the size of water dropper design pressure affects the physical dimension of emitter flow channel, is related to the requirement to filter quality, directly affects the configuration of filter plant.Therefore, strictly speaking, the investment of filter plant also becomes positive correlation with pressure size.In summary, whether pressure is a most key factor to the investment of drip irrigation system.Under low-pressure drip irrigation condition, not only can reduce design standard and the manufacturing cost of system equipment, also have effect that is energy-conservation and reduction running cost simultaneously, there are the potentiality significantly reducing drip irrigation system cost.At present, minute-pressure water saving water dropper all adopts the version of normal pressure lower flow channel, under minute-pressure condition, for reaching effect of energy dissipation, usually adopt the unit number increasing labyrinth flow-path, or it is long-pending to reduce cross section of fluid channel, this just causes the raising of manufacturing cost, also increases blocking probability simultaneously.
Therefore, at current international and domestic grain security, water resource contradiction under the new situation, high energy dissipating minute-pressure drip irrigation emitter is developed to the development promoting drip irrigation technique, significant.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of emitter flow channel structure.
The technical scheme that the present invention takes for the technical problem existed in solution known technology is:
Emitter flow channel structure of the present invention, comprises water inlet, delivery port and runner, and water inlet and delivery port are separately positioned on the two ends of runner, and in runner, distribution arranges multiple four sides cylinder.
The present invention can also adopt following technical measures:
The setting direction of described four sides cylinder is vertical with the flow direction of liquid in runner.
The setting direction of described each four sides cylinder is parallel to each other.
Described four sides cylinder is evenly arranged along flow direction by row, and forms netted runner between the cylinder of four sides.
In adjacent column, each four sides cylinder is staggered.
There is a seamed edge in the cylinder of each four sides just to the direction that liquid stream is come, the side plane of these seamed edge both sides and flow direction oblique, also have a seamed edge towards the direction of liquid diffluence simultaneously.
The cross section of described four sides cylinder is rhombus.
The advantage that the present invention has and good effect are:
In emitter flow channel structure of the present invention, arrangement arranges multiple four sides cylinder, and forms netted runner between the cylinder of four sides, and liquid is formed in intersection of runner inner different branch and impacts, and consumes energy; Because the longitudinal section of runner has sudden enlargement and reduces suddenly and have the characteristic of streaming, form the flow channels of sudden contraction, sudden expansion, flow past cylinder, there is too urgent change in boundary layer current, impels boundary layer current to be separated with border, forms burble point.Below burble point, current depart from border, form the stream band without depending on.The side of stream band is for just to flow, and opposite side is circulation around circuit.Just flow with circulation on there is larger transverse direction stream gradient and corresponding shearing stress, this current gradient and shearing stress, drive circulation movement.And the circulation produced because of current and boundary separation, can drive the materials such as silt, alleviate blockage problem, meanwhile, ring current shock flow path boundary, increases the loss of flood peak, has efficient effect of energy dissipation, is conducive to the flow stance index reducing water dropper, drips more even.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of emitter flow channel structure of the present invention;
Fig. 2 is pressure flow graph of a relation in emitter flow channel structure of the present invention;
Fig. 3 is flowpath pressure distribution map in emitter flow channel structure of the present invention;
Fig. 4 is runner speed vector figure in emitter flow channel structure of the present invention.
Embodiment
Below in conjunction with drawings and Examples, technical scheme is specifically described.
As shown in Figure 1, emitter flow channel structure of the present invention, comprise water inlet 1, delivery port 4 and runner 2, water inlet and delivery port are separately positioned on the two ends of runner, and in runner, distribution arranges multiple four sides cylinder 3.
The setting direction of four sides cylinder is vertical with the flow direction of liquid in runner, thus the liquid in runner is impacted with cylinder front, four sides.
The setting direction of each four sides cylinder is parallel to each other.
Four sides cylinder is evenly arranged along flow direction by row, and forms netted runner between the cylinder of four sides.
In adjacent column, each four sides cylinder is staggered, and the liquid between adjacent two row four sides cylinders is flowed gently by runner.
There is a seamed edge in the cylinder of each four sides just to the direction that liquid stream is come, the side plane of these seamed edge both sides and flow direction oblique, also have a seamed edge towards the direction of liquid diffluence simultaneously.
The cross section of four sides cylinder is rhombus, and cross section is that rhombus four sides cylinder is only a kind of embodiment.
When irrigating, liquid in emitter flow channel structure is water, current enter from the water inlet of runner, because water inlet is also provided with multiple four sides cylinder, thus define multiple water inlet, and multiple water inlet can alleviate blockage problem, when flowing through first row four sides cylinder, fluid is formed in the tail end runner intersection of four sides cylinder and impacts, and reaches the object of energy ezpenditure; Current are after impacting, and after then walking around secondary series four sides cylinder again, shunt again, current sudden enlargement, too urgent change occurs boundary layer current, impels boundary layer current to be separated with border, forms burble point.Below burble point, current depart from border, form the stream band without depending on.The side of stream band is for just to flow, and opposite side is circulation around circuit.Circulation not only can drive the materials such as silt, alleviates blockage problem, and meanwhile, ring current shock flow path boundary, increases the loss of flood peak, have efficient effect of energy dissipation, is conducive to the flow stance index reducing water dropper, drips more even.
Current are after the cylinder of first row four sides, and current are by after sudden enlargement, and the flow channels again through reducing suddenly, through secondary series four sides cylinder, from then on start another energy dissipation of taking turns, circulation is gone down successively, finally reaches the object of evenly pouring water.
As shown in Figure 2, adopt Fluent to carry out numerical simulation to the netted runner of this water dropper, obtain flow field and the pressure-plotting of runner, illustrate mechanism of energy dissipation and the hydraulic performance thereof of runner further.Under tunnel inlets arranges different pressures condition, obtain runner flow at various pressures, simulate pressure flow matched curve figure and the relational expression of this water dropper according to this series data, flow stance index is 0.531, and runner flow-shape is full turbulent flow.Under minute-pressure (below 5m head) condition, the water flow of water dropper is 1.60L/h, and under meeting minute-pressure condition, water yield is less than the requirement of 2.0L/h.
As shown in Figure 3, in runner, pressure evenly reduces along import to Way out, and this just for providing theoretical foundation by the series of channels of increase and decrease unit number design different flow on basis of the present invention.
As shown in Figure 4, the speed vector figure of runner shows the flow regime of current in runner, differentiate the region that flow velocity is higher and flow velocity is lower, significantly find out that current are by after sudden enlargement, flow channels again through reducing suddenly, fluid forms high-velocity flow in the tail end runner intersection of four sides cylinder, reaches the object of energy ezpenditure after impact, the mechanism of energy dissipation of simultaneous verification runner and effect of energy dissipation.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention with preferred embodiment openly as above, but, and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, certainly the technology contents of announcement can be utilized to make a little change or modification, become the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all belong in the scope of technical solution of the present invention.
Claims (7)
1. an emitter flow channel structure, comprises water inlet, delivery port and runner, and water inlet and delivery port are separately positioned on the two ends of runner, it is characterized in that: in runner, distribution arranges multiple four sides cylinder.
2. emitter flow channel structure according to claim 1, is characterized in that: the setting direction of four sides cylinder is vertical with the flow direction of liquid in runner.
3. emitter flow channel structure according to claim 1 and 2, is characterized in that: the setting direction of each four sides cylinder is parallel to each other.
4. emitter flow channel structure according to claim 1 and 2, is characterized in that: four sides cylinder is evenly arranged along flow direction by row, and forms netted runner between the cylinder of four sides.
5. emitter flow channel structure according to claim 4, is characterized in that: in adjacent column, each four sides cylinder is staggered.
6. the emitter flow channel structure according to claim 1 or 4, it is characterized in that: have a seamed edge in the cylinder of each four sides just to the direction that liquid stream is come, the side plane of these seamed edge both sides and flow direction oblique, also have a seamed edge towards the direction of liquid diffluence simultaneously.
7. emitter flow channel structure according to claim 1, is characterized in that: the cross section of four sides cylinder is rhombus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510537839.3A CN105359932A (en) | 2015-08-28 | 2015-08-28 | Emitter channel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510537839.3A CN105359932A (en) | 2015-08-28 | 2015-08-28 | Emitter channel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105359932A true CN105359932A (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510537839.3A Pending CN105359932A (en) | 2015-08-28 | 2015-08-28 | Emitter channel structure |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4281798A (en) * | 1978-09-07 | 1981-08-04 | Noam Lemelstrich | Drip or trickle emitter |
| CN1454459A (en) * | 2002-04-29 | 2003-11-12 | 中国农业大学 | Drip irrigator |
| US20060186228A1 (en) * | 2005-02-23 | 2006-08-24 | Belford James W | Irrigation dripper and pipe |
| CN201216100Y (en) * | 2008-05-09 | 2009-04-08 | 华中科技大学 | Single-wing double-channel circumferential motion micropressure drip irrigation belt |
| CN101422758A (en) * | 2008-12-02 | 2009-05-06 | 江苏大学 | Triangular circulation drip irrigator flow passage |
| WO2015023624A1 (en) * | 2013-08-12 | 2015-02-19 | Rain Bird Corporation | Elastomeric emitter and methods relating to same |
-
2015
- 2015-08-28 CN CN201510537839.3A patent/CN105359932A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4281798A (en) * | 1978-09-07 | 1981-08-04 | Noam Lemelstrich | Drip or trickle emitter |
| CN1454459A (en) * | 2002-04-29 | 2003-11-12 | 中国农业大学 | Drip irrigator |
| US20060186228A1 (en) * | 2005-02-23 | 2006-08-24 | Belford James W | Irrigation dripper and pipe |
| CN201216100Y (en) * | 2008-05-09 | 2009-04-08 | 华中科技大学 | Single-wing double-channel circumferential motion micropressure drip irrigation belt |
| CN101422758A (en) * | 2008-12-02 | 2009-05-06 | 江苏大学 | Triangular circulation drip irrigator flow passage |
| WO2015023624A1 (en) * | 2013-08-12 | 2015-02-19 | Rain Bird Corporation | Elastomeric emitter and methods relating to same |
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Application publication date: 20160302 |