CN107318593B - Combined press force compensating douche between a kind of washable pipe - Google Patents
Combined press force compensating douche between a kind of washable pipe Download PDFInfo
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- CN107318593B CN107318593B CN201710722588.5A CN201710722588A CN107318593B CN 107318593 B CN107318593 B CN 107318593B CN 201710722588 A CN201710722588 A CN 201710722588A CN 107318593 B CN107318593 B CN 107318593B
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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
Abstract
The present invention relates to Combined press force compensating douches between a kind of washable pipe, including emitter body, pressure-compensated film, water outlet ring cavity and movable screwed pipe；Fixed screw is set in one end of emitter body, is connected through a screw thread movable screwed pipe in the other end of emitter body；It is disposed with the first labyrinth flow-path on the outer wall for the emitter body being located between fixed screw and movable screwed pipe, the whole story of the first labyrinth flow-path is the water inlet communicated with the inside of emitter body；Water outlet ring cavity is arranged in the outside of the emitter body between fixed screw and movable screwed pipe；Pressure-compensated film ring is located between water outlet ring cavity and emitter body and both ends are limited in fixed screw and movable screwed pipe；Second labyrinth flow-path is set on the inner wall of water outlet ring cavity, and the end of the second labyrinth flow-path is the water outlet communicated with the outside of water outlet ring cavity；The film flowing hole of connection the first labyrinth flow-path and the second labyrinth flow-path is provided on pressure-compensated film.
Description
Technical field
The present invention relates to Combined press force compensating douches between a kind of washable pipe, belong to agricultural irrigation technology.
Background technique
China faces severe shortage of water resources problem, and agricultural irrigation, which is used as, uses water rich and influential family, and imbalance between supply and demand is outstanding day by day, and
Agricultural irrigation water effective rate of utilization is low, and water-saving irrigation is come into being.Trickle irrigation is the highest slight irrigation mode of current water saving efficiency, water
Utilization rate may be up to 95% or more, be an important technique measure for ensureing China's agricultural sustainable development.Douche is entire
The core and key component of drip irrigation system, the anti-blockage capability and aging effects of the superiority and inferiority of structure to uniformity of pouring water, system
It is very big.There are many kinds of douches used in drip irrigation system, and pressure compensation douche is one of the type being widely used.Pressure
Compensation douche is a kind of adjustment effect realization constant current water outlet that can compensate gasket by internal pressure within the scope of certain pressure
Trickle irrigation end equipment, have many advantages, such as compensation performance is good, pour water uniformly, laying length is long, wide adaptation range, especially suitable for
Hypsography is larger, system pressure is unbalanced and the longer situation of hollow billet.Generally for preferable hydraulic performance is guaranteed, pressure is mended
The general very little of inner flow passage size of douche is repaid, existing labyrinth flow-path and pressure-compensated structure combine currently on the market
Pressure-compensated douche, channel size is also easy to produce blocking mostly between 0.7~1.5mm, and flow is less than normal, be not suitable for
It is irrigated in mountainous region economic forest.Moreover, the pressure-compensated douche currently existed, although having certain pressure compensation
Can and the good uniformity, but its compensate section it is smaller, apply in mountainous region gravity irrigation compensate section can not be with mountainous region height difference
It is adapted with complicated landform, the high advantage of its uniformity of irrigation water appilcation cannot be played, it is poor to result in the douche uniformity, irrigates effect
The bad defect of fruit.Therefore, solving the problems such as douche easily blocks, flow is small and compensation performance is poor has particularly important meaning
Justice.
The common blocking mode of douche mainly has physical clogging, electroless Ni-P-C-O plating, toxicity bioassay etc., generally most with physical clogging
It is common.The effective ways for solving the physical clogging as caused by sand grain be increase its import and channel size, but increase into
Mouth and channel size will sacrifice the part hydraulic performance of runner.Application No. is 201610532350.1 Chinese patent applications to disclose
A kind of compensation drip emitter, is optimized design to douche inside cavity structure, improves irrigation efficiency and water
The utilization rate of resource, but the adjustable range of its flow is smaller, is not able to satisfy the requirement of big flow irrigation, and structural shape is on pipe
Outlet type when more complicated applied to landform mountainous region, assembles time-consuming and laborious.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide Combined press force compensating douche between a kind of washable pipe, it should
Douche can solve the problems, such as the anti-clogging of douche in the case where not changing channel size, to not influence the waterpower of douche
Performance.
To achieve the above object, the invention adopts the following technical scheme: Combined press force compensating fills between a kind of washable pipe
Hydrophone, it is characterised in that: including emitter body, pressure-compensated film, water outlet ring cavity and movable screwed pipe；In the douche
Fixed screw is arranged in one end of main body, is connected through a screw thread the movable screwed pipe in the other end of the emitter body；In place
It is disposed with the first labyrinth flow-path on the outer wall of the emitter body between the fixed screw and movable screwed pipe, described the
The whole story of one labyrinth flow-path is the water inlet communicated with the inside of the emitter body；The water outlet ring cavity is arranged in institute
State the outside of the emitter body between fixed screw and movable screwed pipe；The pressure-compensated film ring goes out described in being located at
Between water ring chamber and the emitter body and both ends are limited in fixed screw and movable screwed pipe；In the inner wall of the water outlet ring cavity
The second labyrinth flow-path of upper setting, the end of second labyrinth flow-path are the water outlet communicated with the outside of the water outlet ring cavity；
The film flowing hole of connection the first labyrinth flow-path and the second labyrinth flow-path is provided on the pressure-compensated film.
The emitter body is hollow cylindrical structure, and the hollow cylindrical structure is arranged in first labyrinth flow-path
On outer wall；First labyrinth flow-path and the second labyrinth flow-path are tooth-shape labyrinth runner.
The fixed screw and movable screwed pipe are connected through a screw thread hollow billet respectively.
The end of second labyrinth flow-path is provided with adjusting ring cavity, the center for adjusting ring cavity is provided with circle
Ring convex platform, the water outlet are located at the hollow part of the circle convex platform；Through slot is provided on the side wall of the circle convex platform.
The water outlet ring cavity is the hollow cylindrical structure that both ends bore is big, middle part bore is small, wherein heavy caliber part is used for
The water outlet ring cavity is located between the fixed screw and movable screwed pipe, the internal diameter of osculum path portion and the pressure compensation
The outer diameter of formula film is equal.The section flow surface of the area and the first labyrinth flow-path of the film flowing hole, the second labyrinth flow-path
Product is identical.
It is offered on the emitter body multiple for saving the groove of material.
Filtering grid is provided on the water inlet.
The height of the circle convex platform is less than the height for adjusting ring cavity.
The parameter of the tooth-shape labyrinth runner meets following geometrical relationships:
F=0.7776w+0.0307, n=-181.64w2+ 390.9w-70.51, a=-0.7857w2+1.6753w+
0.3852
In formula, w is width of flow path；F is local loosening；A is the facewidth；N is flow passage unit number.
The invention adopts the above technical scheme, which has the following advantages: 1 present invention realizes emitter body and pressure
Compensation type film, the separation for being discharged ring cavity have disassembly, advantage easy to clean, can be with therefore when runner blocks
Emitter body is taken out from water outlet ring cavity, is respectively washed pressure-compensated film and emitter body, grasps by rotary moveable screwed pipe
Make simply, to make the available very good solution of douche blockage problem, the raising of performance of anti-blockage is able to extend making for douche
With the time limit, the use cost of trickle irrigation is substantially reduced.It is 2, of the invention on the basis of outlet type pressure compensation douche structure on pipe,
Formula pressure compensation douche between the pipe that proposition labyrinth flow-path and pressure-compensated structure combine, wherein emitter body inner cavity
It can be used as hollow billet overcurrent, outer wall arranges labyrinth flow-path, makes full use of the structural advantage of column type douche, while utilizing screw thread knot
Structure realizes the separation of hollow billet and douche, changes the design concept of douche Yu hollow billet integral type.3, the present invention is in conventional pressure
On the basis of the gland of force compensating douche, the water outlet ring cavity of hollow cylindrical structure is proposed, plays the role of fixed film, together
Shi Qi inner wall arranges labyrinth flow-path and adjusts ring cavity, the deformable area after increasing pressure-compensated film stress, greatly
Pressure compensation section is increased greatly.4, in use, pressure-compensated film can be sent out according to the variation for carrying out water pressure
Raw different degrees of deformation, uses the second labyrinth flow-path on water ring chamber and adjusting ring cavity is crossed water depth and sent out with the variation of pressure
Raw to change, fluid motion is voluntarily adjusted with pressure-compensated deformation of thin membrane interaction convection current road water outlet uninterrupted,
Realize water outlet constant discharging.5, douche is first mounted on to the side of hollow billet, then in field when present invention assembling douche
Between when being installed, hollow billet is placed on corresponding position, staff only need to by the hollow billet side for not installing douche with connect
The screwed pipe of the douche of hollow billet carries out screwing up connection, to greatly reduce installation workload.6, each component part of the present invention
It is all independent part, it is a certain when destructing serious partially, it is only necessary to which that replacement damages part, changes conventional cylindrical labyrinth type douche
The production theory of disposable products realizes seriation, the standardization of such New-style Emitter.7, the present invention is discharged ring cavity, pours water
Device main body can put into batch production, and the structure by changing labyrinth flow-path meets flow different in agricultural production from size
Demand.8, water outlet lower end of the present invention is a circle convex platform, is equipped on the outside of circle convex platform and adjusts ring cavity, and the height of boss, which is less than, to be adjusted
The height for saving ring cavity prevents film deflection at adjusting ring cavity excessive, and circle convex platform is equipped with through slot, prevents film from blocking out
The mouth of a river hinders to flow out.9, the present invention can meet the irrigation requirement within the scope of certain flow, and uniformity of irrigation water appilcation is high, be suitable for various mountains
The significantly regional agricultural production trickle irrigation of variation in water pressure and small flow irrigate situation in the aqueducts such as ground, hills, the scope of application compared with
Extensively.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural schematic diagram of emitter body of the present invention；
Fig. 3 is the structural schematic diagram of movable screwed pipe of the invention；
Fig. 4 is the scheme of installation of pressure-compensated film and emitter body of the present invention；
Fig. 5 is the schematic cross-sectional view of present invention water outlet ring cavity；
Fig. 6 be in Fig. 5 A-A to half-section diagram；
Fig. 7 is the half-section diagram of B-B direction in Fig. 5；Wherein, what 1. corresponding line indicated is first stage pressure-compensated
The also undeformed schematic diagram of film, 2. what corresponding line indicated is the schematic diagram after second stage deformation of thin membrane, at this point, runner mistake
Water area reduces, and douche plays pressure compensation effect；
Fig. 8 is the structural schematic diagram of hollow billet of the present invention；
Fig. 9 is the geometrical model schematic diagram of (first/second) labyrinth flow-path of the invention；
Figure 10 is the curve relation figure that width of flow path w changes with average water head loss coefficient f；
Figure 11 is the curve relation figure of flow passage unit number n Yu width of flow path w；
Figure 12 is the curve relation figure of facewidth a Yu width of flow path w.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in figures 1-4, the present invention includes emitter body 1, pressure-compensated film 2, water outlet ring cavity 3 and movable screw
Pipe 4.Fixed screw 5 is set in one end of emitter body 1, is connected through a screw thread movable screw in the other end of emitter body 1
Pipe 4.It is disposed with the first labyrinth flow-path 6 on the outer wall for the emitter body 1 being located between fixed screw 5 and movable screwed pipe 4, the
The whole story of one labyrinth flow-path 6 is the water inlet 7 communicated with the inside of emitter body 1.Water outlet ring cavity 3 is arranged in fixed spiral shell
The outside of emitter body 1 between pipe 5 and movable screwed pipe 4.2 ring of pressure-compensated film is located at water outlet ring cavity 3 and douche
Between main body 1 and both ends are limited in fixed screw 5 and movable screwed pipe 4.Second labyrinth flow-path is set on the inner wall of water outlet ring cavity 3
8, the end of the second labyrinth flow-path 8 is the water outlet 9 communicated with the outside of water outlet ring cavity 3.It is arranged on pressure-compensated film 2
There is the film flowing hole 10 of connection the first labyrinth flow-path 6 and the second labyrinth flow-path 8.
Further, emitter body 1 is hollow cylindrical structure, and hollow cylindrical structure is arranged in the first labyrinth flow-path 6
On outer wall.First labyrinth flow-path 6 and the second labyrinth flow-path 8 are tooth-shape labyrinth runner.
Further, it as shown in Fig. 5~7, is provided in the end of the second labyrinth flow-path 8 and adjusts ring cavity 12, adjust ring cavity
12 center is provided with circle convex platform 13, and water outlet 9 is located at the hollow part of circle convex platform 13.The height of circle convex platform 13
Less than the height for adjusting ring cavity 12, prevent the deformation at adjusting 12 position of ring cavity of pressure-compensated film 2 excessive.In circle convex platform
It is provided with through slot 14 on 13 side wall, blocks water outlet 9 after preventing pressure-compensated film 2 from deforming and hinders to flow out.
Further, fixed screw 5 and movable screwed pipe 4 are connect by screw thread with hollow billet 11 (as shown in Figure 8) respectively.
Further, water outlet ring cavity 3 is the hollow cylindrical structure that both ends bore is big, middle part bore is small, wherein heavy caliber portion
Divide and is located between fixed screw 5 and movable screwed pipe 4 for ring cavity 3 will to be discharged, the internal diameter and pressure-compensated of osculum path portion
The outer diameter of film 2 is equal, so that the second labyrinth flow-path 8 is sealed by pressure-compensated film 2.
Further, the section flow surface of the area of film flowing hole 10 and the first labyrinth flow-path 6, the second labyrinth flow-path 8
Product is identical, so as to avoid having an impact water flow hydraulic performance because area of passage changes.
Further, it is offered on emitter body 1 multiple for saving the groove 15 of material.
Further, filtering grid is provided on water inlet 7, it can be with the impurity in filtering irrigation water to reduce blocking.
The operation principle of the present invention is that: water flow enters the first labyrinth flow-path 6 of emitter body 1 from water inlet 7, through pressure
The film flowing hole 10 of compensation type film 2 enters the second labyrinth flow-path 8 of water outlet ring cavity 3, then through water outlet 3 middle position of ring cavity
The collection waters for adjusting ring cavity 12 reaches the water outlet 9 on top.With the continuous variation of intake pressure, under pressure-compensated film 2
By the impact of hydraulic pressure, deformation occurs in portion, leads to second labyrinth flow-path 8 on 2 top of pressure-compensated film and adjusts ring cavity 12
Corresponding change occurs for the cross-section of river, is discharged 8 internal pressure of the second labyrinth flow-path on ring cavity 3 and adjusts 12 internal pressure of ring cavity hair
The raw extruding for changing renitency compensation type film 2 in turn adjusts douche flow by the way that this interaction is common, uses
Water is more evenly.Under normal pressure, the second labyrinth flow-path 8 being discharged on 3 inner wall of ring cavity and the face for crossing water section for adjusting ring cavity 12
Product is maximum, and the outlet of douche normally goes out to flow, and as the pressure increases, pressure-compensated film 2 raises upward, at this time pressure compensation
Formula film 2 squeezes the second labyrinth flow-path 8 and adjusts ring cavity 12, blocks a part of runner exit section, the second labyrinth flow-path 8 and tune
Section 12 water-outlet area of ring cavity changes, and influences the fluid in runner in turn.Intake pressure and on water outlet ring cavity 3 second at this time
8 internal pressure of labyrinth flow-path adjusts 12 internal pressure of ring cavity to film mutual extrusion, and collective effect reduces the second labyrinth flow-path 8
With adjusting 12 discharge area of ring cavity, flow reduces therewith, this to substantially increase by the compensation way for changing discharge section area
Pressure compensation section, improves the water outlet uniformity of mountainous region trickle irrigation, while also improving degree of regulation and reliability.
The present invention realizes emitter body 1 and pressure-compensated film 2, the separation for being discharged ring cavity 3, disassembly, cleaning side
Just, therefore when runner blocks, emitter body 1 can be taken out from water outlet ring cavity 3 with rotary moveable screwed pipe 4, it is clear respectively
Pressure-compensated film 2 and emitter body 1 are washed, it is easy to operate, make the available very good solution of douche blockage problem, resists
The raising of plugging performance is able to extend the service life of douche, substantially reduces the use cost of trickle irrigation.
The present invention also does to study the structure of tooth-shape labyrinth runner, does the parameter of tooth-shape labyrinth flow passage structure to limit
It is fixed, to reach by increasing width of flow path, to reduce runner blocking frequency, flow passage unit number is reduced, project cost is reduced
Purpose.As shown in figure 9, by plane geometry model it can be concluded that width of flow path and the geometry that the facewidth, tooth are high, bottom of the tooth is away between close
System:
Wherein meet following relationship between the facewidth and tooth height and tooth angle:
Runner discharge area A can be indicated before not deforming are as follows:
A=d × w (3)
Runner water flow Q can be indicated are as follows:
In formula: w is width of flow path, mm；H is that tooth is high, mm；A is the facewidth, mm；B is bottom of the tooth away from mm；θ is tooth angle, °；d
For flow channel depth, mm；A is cross section of fluid channel area, m2；Q is runner water flow, L/h；For the average speed of fluid, m ﹒ s-1。
It from performance of anti-blockage and is produced into originally, biggish runner discharge area and shorter flow channel length help to mention
The performance of anti-blockage and reduction cost of high douche, while can satisfy the big flow demand of pressure compensation douche, still
Increase width of flow path, reduction flow passage unit number can reduce the effect of energy dissipation of runner, and therefore, the present invention proposes wide in increase runner
While degree, reduction flow passage unit number, increase average water head loss coefficient, so that increasing runner discharge area, reducing runner
Unit number can't weaken the effect of energy dissipation of runner.
In view of water flow can be ignored by the frictional head loss in runner, the present invention only examines in calculating process
Consider local head loss, it is long by runner for identical flow channel shape since local loosening is only related with flow channel shape
It spends for the local head loss of distribution, the pressure loss evenly distributes in length, meets linear superposition rule, therefore
Can be discrete by entire head loss and be evenly distributed in entire runner, and come by Darcy-Weisbach formula (7) close
Like the head loss of expression runner.Further, since the 90% of head loss occurs at tooth tip structure, therefore, the present invention is being counted
Assume that local loosening is only related with runner corner α during calculating, according to existing local head loss's empirical coefficient
Table (is shown in Table 1), and discovery local loosening f and runner corner α meet relational expression:
F=0.7 × 10-4×α2.1441 (5)
In view of water flow will be by the runner corner α of two equal angulars, therefore by a tooth form labyrinth flow-path unit
α=90 °-θ/2 is substituted into formula (5), local loosening f is obtained and angle between teeth θ meets relational expression:
F=1.4 × 10-4×(90°-θ/2)2.1441 (6)
In formula: H is head loss, m；F is local loosening, related with runner corner, looks into local head loss
Empirical coefficient table (table 1) is known；α is runner corner, °；N is flow passage unit number；liFor single flow passage unit flow channel length, mm；D
For hydraulic diameter, mm；G is acceleration of gravity, takes 9.81m/s2。
Formula (1), (3) and formula (6)~(9) are substituted into formula (4), are obtained:
From formula (10), it can be seen that, the relationship between flow Q and width of flow path w, flow passage unit number n is extremely complex,
Therefore the present invention proposes to utilize the geometrical relationship between runner geometric parameter under the premise of guaranteeing that runner water flow Q is constant
The relationship between flow passage unit number n and width of flow path w is roughly analyzed with hydraulic formula.
In the case where not considering deformation of thin membrane, it is assumed that water inlet working head is 10m, and Serial regulation geometric parameter makes
Average water head loss coefficient f increases and approximately linear increase with width of flow path w, at this time flow passage unit number n and width of flow path w
Relationship meet the parabolic relation curve that Open Side Down, while the variation of facewidth a also shows this rule, obtains result such as
Shown in Figure 10~12.By fitting, obtained formula is respectively f=0.7776w+0.0307, n=-181.64w2+390.9w-
70.51 a=-0.7857w2The coefficient of+1.6753w+0.3852, these relational expressions can change with the variation of concrete condition,
But the changing rule of these parameters will not become.Calculated result is shown in Table 2,3, by taking circumferential edge as an example, when width of flow path w is greater than
When 1.10mm, average water head loss coefficient f continues to increase, and flow passage unit number n starts to reduce, in actual production operation, according to
It according to the changing rule between the parameters obtained herein, is specifically designed, obtains wide runner, the pressure of few flow passage unit is mended
Repay douche.
1 local head loss's empirical coefficient table of table
2 runner discharge area computational chart of table
3 runner mean flow rate of table, water flow computational chart
The present invention is only illustrated with above-described embodiment, and structure, setting position and its connection of each component are all can have
Changed, based on the technical solution of the present invention, improvement that all principles according to the present invention carry out individual part and equivalent
Transformation, should not exclude except protection scope of the present invention.
Claims (8)
1. Combined press force compensating douche between a kind of washable pipe, it is characterised in that: including emitter body, pressure-compensated
Film, water outlet ring cavity and movable screwed pipe；Fixed screw is set in one end of the emitter body, in the emitter body
The other end is connected through a screw thread the movable screwed pipe；In the douche master being located between the fixed screw and movable screwed pipe
The first labyrinth flow-path is disposed on the outer wall of body, the whole story of first labyrinth flow-path is the inside phase with the emitter body
Logical water inlet；The water outlet ring cavity is arranged in the emitter body between the fixed screw and movable screwed pipe
It is external；The pressure-compensated film ring is located between the water outlet ring cavity and the emitter body and both ends are limited in fixation
Screwed pipe and movable screwed pipe；The second labyrinth flow-path, the end of second labyrinth flow-path are set on the inner wall of the water outlet ring cavity
For the water outlet communicated with the outside of the water outlet ring cavity；The first labyrinth flow of connection is provided on the pressure-compensated film
The film flowing hole in road and the second labyrinth flow-path；
The end of second labyrinth flow-path is provided with adjusting ring cavity, it is convex that the center for adjusting ring cavity is provided with annulus
Platform, the water outlet are located at the hollow part of the circle convex platform；Through slot is provided on the side wall of the circle convex platform；
The water outlet ring cavity is the hollow cylindrical structure that both ends bore is big, middle part bore is small, wherein heavy caliber part is used for institute
It states water outlet ring cavity to be located between the fixed screw and movable screwed pipe, the internal diameter of osculum path portion and the pressure-compensated are thin
The outer diameter of film is equal.
2. Combined press force compensating douche between a kind of washable pipe as described in claim 1, it is characterised in that: described to pour water
Device main body is hollow cylindrical structure, and first labyrinth flow-path is arranged on the outer wall of the hollow cylindrical structure；Described first
Labyrinth flow-path and the second labyrinth flow-path are tooth-shape labyrinth runner.
3. Combined press force compensating douche between a kind of washable pipe as described in claim 1, it is characterised in that: the fixation
Screwed pipe and movable screwed pipe are connected through a screw thread hollow billet respectively.
4. Combined press force compensating douche between a kind of washable pipe as described in claim 1, it is characterised in that: the film
The area of flowing hole is identical as the first labyrinth flow-path, the section discharge area of the second labyrinth flow-path.
5. Combined press force compensating douche between a kind of washable pipe as described in claim 1, it is characterised in that: in the filling
It is offered on water machine body multiple for saving the groove of material.
6. Combined press force compensating douche between a kind of washable pipe as described in claim 1, it is characterised in that: it is described into
Filtering grid is provided on the mouth of a river.
7. Combined press force compensating douche between a kind of washable pipe as described in claim 1, it is characterised in that: the annulus
The height of boss is less than the height for adjusting ring cavity.
8. Combined press force compensating douche between a kind of washable pipe as claimed in claim 2, it is characterised in that: the flute profile
The parameter of labyrinth flow-path meets following geometrical relationships:
F=0.7776w+0.0307, n=-181.64w2+ 390.9w-70.51, a=-0.7857w2+1.6753w+0.3852
In formula, w is width of flow path；F is local loosening；A is the facewidth；N is flow passage unit number.
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| CN201710722588.5A CN107318593B (en) | 2017-08-22 | 2017-08-22 | Combined press force compensating douche between a kind of washable pipe |
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| CN107318593B true CN107318593B (en) | 2019-11-29 |
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| CN108935016A (en) * | 2018-09-11 | 2018-12-07 | 中国农业大学 | A kind of flow regulator for drip irrigation |
| CN111527856B (en) * | 2020-05-28 | 2021-06-25 | 安徽省益丰生态农业科技有限公司 | Drip irrigation device for integrating water and fertilizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100527943C (en) * | 2006-12-18 | 2009-08-19 | 西安交通大学 | A pressure compensation douche quick development method |
| CN102389866B (en) * | 2011-07-21 | 2013-11-20 | 西北农林科技大学 | Backwash-type fountain root-irrigation irrigator |
| CN102550368B (en) * | 2011-12-12 | 2013-06-26 | 西北农林科技大学 | Underground pressure bubbler root irrigation device |
| CN203505210U (en) * | 2013-10-30 | 2014-04-02 | 库尔勒润业工贸有限公司 | Inlayed-cylinder pressure compensation type drip irrigation pipe |
| CN204291926U (en) * | 2014-11-25 | 2015-04-29 | 新疆西部节水科技股份有限公司 | Interior edge paster pressure compensated drip device |
| CN106096179B (en) * | 2016-06-24 | 2018-07-24 | 中国农业大学 | Drip emitter flow passage structure design method and its fractal runner drip emitter product |
| CN106171843B (en) * | 2016-07-07 | 2019-05-21 | 中国农业大学 | A kind of anti-clogging pressure compensation douche of the uniform self-regulated of rate of discharge |
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