CN108812218B - Pressure compensation micro-sprinkling irrigation water device - Google Patents

Pressure compensation micro-sprinkling irrigation water device Download PDF

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Publication number
CN108812218B
CN108812218B CN201810728735.4A CN201810728735A CN108812218B CN 108812218 B CN108812218 B CN 108812218B CN 201810728735 A CN201810728735 A CN 201810728735A CN 108812218 B CN108812218 B CN 108812218B
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pressure compensation
cavity
spray
micro
compensation cavity
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CN108812218A (en
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张中华
吴小李
吕名礼
李华
张冬菊
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Shanghai Huawei Controllable Agricultural Technology Group Co ltd
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Huawei Water Saving Technology Group Co ltd
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00Watering gardens, fields, sports grounds or the like
    • A01G25/02Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation

Abstract

The invention discloses a pressure compensation micro-sprinkler irrigation device, which comprises a pressure compensation micro-sprinkler adapter and a rotary micro-sprinkler head arranged on the pressure compensation micro-sprinkler adapter. The pressure compensation micro-spray adapter is internally provided with a water pressure compensation system consisting of a lower pressure compensation cavity, an upper pressure compensation cavity, a rear pressure compensation cavity, a pressure compensation table and a pressure compensation chip, wherein the rotary micro-spray head comprises a spray nozzle, a frame and a spray disc, the rotary micro-spray head 1 can spray in 360-degree rotation, the spray radius is 2-6 m, and the flow is 40-200L/h. When the spray disc works, water ejects the spray disc, water is sprayed out, and when the spray disc stops working, the spray disc automatically falls down to coincide with the plane of the spray nozzle, so that the spray disc is in a closed state, and insects and impurities are prevented from entering the spray disc. The invention always ensures the consistency of flow no matter how the pressure changes within a certain pressure difference range, and can ensure the consistency of water and nutrients obtained by crops.

Description

Pressure compensation micro-sprinkling irrigation water device
Technical Field
The invention relates to the field of micro-sprinkler irrigation, in particular to a pressure compensation micro-sprinkler irrigation device.
Background
In the implementation process, the irrigation pipeline is paved according to the plant spacing of crops, the length of a single branch pipe can reach hundreds of meters or hundreds of meters, and the micro-spray head is connected with the irrigation branch pipe to take water and is arranged near the crops for spraying. The disadvantage of this approach is that: the inlet end and the tail end of the pipeline with hundreds of meters can cause great pressure difference due to water gap loss, and the common flow of the common micro-spray head is in direct proportion to the pressure, so that the larger the pressure is, the larger the flow is, the condition that the water quantity obtained by front crops is inconsistent with the water quantity obtained by the middle and the tail ends and the nutrients are inconsistent can be caused, and the crop yield and the quality are further affected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a pressure compensation micro-sprinkler, which can always ensure the consistency of flow regardless of pressure change within a certain pressure difference range, thereby ensuring that crops acquire consistency of moisture and nutrient.
The technical problems solved by the invention can be realized by adopting the following technical scheme:
a pressure compensation micro-spray water device comprises a pressure compensation micro-spray adapter and a rotary micro-spray head arranged on the pressure compensation micro-spray adapter;
the interior of the pressure compensation micro-spray adapter is a cavity, a pressure compensation table is arranged in the cavity, a pressure compensation chip is arranged on the pressure compensation table, the pressure compensation chip and the inner wall of one side of the pressure compensation micro-spray adapter form an upper pressure compensation cavity, the pressure compensation chip and the inner side of the pressure compensation table form a pressure compensation cavity, the inner wall of the other side of the pressure compensation micro-spray adapter forms a rear pressure compensation cavity, and the upper pressure compensation cavity and the cavity below the pressure compensation chip are arranged as a lower pressure compensation cavity;
the water inlet end of the lower pressure compensation cavity is communicated with a capillary tube interface positioned at the bottom of the pressure compensation micro-spray adapter, the water outlet end of the lower pressure compensation cavity is respectively communicated with an upper pressure compensation cavity and a pressure compensation cavity, a pressure compensation auxiliary channel is arranged on the pressure compensation table, the pressure compensation cavity is communicated with a rear pressure compensation cavity through the pressure compensation auxiliary channel, the water outlet of the rear pressure compensation cavity is communicated with a turbulence cavity positioned at the top of the pressure compensation micro-spray adapter, and the water outlet of the turbulence cavity is communicated with the rotary micro-spray head.
Further, the rotary micro-spray head comprises a spray nozzle, a frame arranged above the spray nozzle and a spray disc movably connected with the frame, a water inlet of the spray nozzle is communicated with the turbulent flow cavity, a water outlet of the spray nozzle is communicated with a flow channel of the spray disc, and the angle of the flow channel is tangential to the circumference.
Further, the pressure compensation process of the pressure compensation micro-spray adapter is as follows:
1) After the pressurized water enters the lower pressure compensation cavity through the capillary tube interface, one part of the pressurized water enters the upper pressure compensation cavity through the flow passage, and the other part of the pressurized water enters the pressure compensation cavity through the through hole;
2) Because the sectional area of the flow channel of the lower pressure compensation cavity communicated with the upper pressure compensation cavity is larger than the sectional area of the through hole, the water inlet speed of the lower pressure compensation cavity is larger than the water inlet speed of the pressure compensation cavity, so that the water pressure in the upper pressure compensation cavity is larger than the water pressure in the pressure compensation cavity, and a pressure compensation chip positioned between the upper pressure compensation cavity and the pressure compensation cavity can be greatly deformed towards the direction of the pressure compensation table under the action of water pressure difference;
3) After the upper pressure compensation cavity and the pressure compensation cavity are filled with water, the upper pressure compensation cavity and the pressure compensation cavity are communicated with each other, so that the water pressures of the upper pressure compensation cavity and the pressure compensation cavity tend to be consistent, and the deformation of the pressure compensation chip can be recovered;
4) In the process, part of pressure water in the pressure compensation cavity can enter the rear pressure compensation cavity through the pressure compensation auxiliary channel, so that the water pressure of the pressure compensation cavity is slightly smaller than that of the upper pressure compensation cavity, and the pressure compensation chip can be deformed to a small extent finally.
Further, the main body of the back pressure compensation cavity is of a W-shaped structure, the water inlet of the back pressure compensation cavity is positioned in the middle of the W-shaped structure, and the water outlet of the back pressure compensation cavity is positioned at two ends of the W-shaped structure.
Further, the pressure compensation micro-spray adapter comprises a shell and a body, wherein a group of symmetrically distributed grooves are formed in the opening of the shell, locking bosses matched with the grooves are arranged on the body, and the shell and the body are fixedly connected through a clamping structure formed by the grooves and the locking bosses.
Furthermore, a plurality of guide ribs are arranged on the conical surface of the turbulent flow cavity.
Further, the caliber of the water inlet of the nozzle is larger than that of the water outlet of the nozzle, and the water inlet is used for providing a flow passage for high-speed water flow to impact the spray disc.
Compared with the prior art, the invention has the beneficial effects that:
the water pressure compensation system consisting of the lower pressure compensation cavity, the upper pressure compensation cavity, the rear pressure compensation cavity, the pressure compensation table and the pressure compensation chip is adopted, so that the consistency of flow is always ensured no matter how the pressure changes within a certain pressure difference range, and the consistency of water and nutrients of crops can be ensured.
Drawings
Fig. 1 is a schematic structural view of a pressure compensating micro-spray emitter according to the present invention.
FIG. 2 is a schematic cross-sectional view of a pressure compensated micro-sprinkler according to the present invention.
FIG. 3 is a cross-sectional view of a rotary micro-spray head according to the present invention.
Fig. 4 is a schematic structural diagram of a rotary micro-spray head according to the present invention.
Fig. 5 is a cross-sectional view of a pressure compensated micro-spray adapter according to the present invention.
Fig. 6 is a schematic diagram illustrating deformation of the pressure compensation chip according to the present invention.
Fig. 7 is a schematic view of a housing of a pressure compensated micro-spray adapter according to the present invention.
Fig. 8 is a schematic diagram of a pressure compensated micro-spray adapter according to the present invention.
Fig. 9 is an exploded view of the pressure compensated micro-spray adapter according to the present invention.
Fig. 10 is a schematic diagram of an assembled structure of the pressure compensating micro-spray adapter according to the present invention.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Referring to fig. 1 to 10, the pressure compensation micro-sprinkler irrigation device comprises a rotary micro-sprinkler head 1 and a pressure compensation micro-sprinkler adapter 2.
The rotary micro-spray head 1 comprises a spray nozzle 3, a frame 4 positioned above the spray nozzle, and a spray disk 5 movably connected with the frame 4, wherein a water inlet of the spray nozzle 3 is communicated with the turbulent flow cavity 20, a water outlet of the spray nozzle 3 is communicated with a flow passage 40 of the spray disk 5, and an angle of the flow passage 40 is tangential to the circumference. The rotary micro-spray head 1 can perform 360-degree rotary spraying, the spraying radius is 2-6 meters, and the flow is 40-200L/h. When the spray disc 5 works, water ejects the spray disc, water is sprayed out, and when the spray disc stops working, the spray disc 5 automatically falls down to coincide with the plane of the spray nozzle 3, so that the spray disc reaches a closed state, and insects and impurities are prevented from entering the spray disc.
The flow channel 40 of the spray disk 5 is an irregular inclined surface, and the outlet angle is tangential to the circumference. The rotary upright post at the bottom of the spray disc 5 is inserted into the position 41 of the frame, the inner diameter is larger than that of the rotary upright post of the spray disc, one end of the upright post 42 which is 2-4 mm deeper than that of the upright post is inserted into the fixed position of the frame, and the other end is inserted into the soil, so that the rotary micro-spray head 1 works in a standing mode; the stable flow through the pressure compensation micro-spray adapter is injected onto the flow channel 40 of the spray disc 5 at high speed through the water outlet 21 of the spray nozzle 3, so as to drive the spray disc 5 to rotate, and a micro-spray effect is formed. When in operation, the spray disc 5 ascends to work, and when not in operation, the spray disc falls down to achieve the insect prevention effect.
The invention can obtain different flow specifications from 20L/h to 400L/h by changing the size of the aperture of the water outlet 21 and the size of the pressure compensation auxiliary channel 16.
The pressure compensating micro-spray adapter 2 comprises a housing 7 and a body 8; the housing 7 is generally cylindrical and has through holes of different diameters therein, and the mouth has two symmetrically arranged grooves 30 which cooperate with locking bosses 31 provided on the body 8. The inner hole of the body 8 is in conformity with the outer diameter of the portion into which the housing 7 is inserted, forming a sealed state. A mounting groove 11 for placing the sealing ring 9 is provided between the housing 7 and the body 8.
The interior of the pressure compensation micro-spray adapter 2 is a cavity, a pressure compensation table 15 is arranged in the cavity, a pressure compensation chip 10 is arranged on the pressure compensation table 15, an upper pressure compensation cavity 12 is formed by the pressure compensation chip 10 and the inner wall of one side of the pressure compensation micro-spray adapter 2, a pressure compensation cavity 13 is formed by the pressure compensation chip 10 and the inner pressure compensation table 15, a rear pressure compensation cavity 18 is formed by the pressure compensation table 15 and the inner wall of the other side of the pressure compensation micro-spray adapter 2, and the cavity below the upper pressure compensation cavity 12 and the pressure compensation chip 10 is set as a lower pressure compensation cavity 17;
the water inlet end of the lower pressure compensation cavity 17 is communicated with the capillary tube interface 6 positioned at the bottom of the pressure compensation micro-spray adapter 2, the water outlet end of the lower pressure compensation cavity 17 is respectively communicated with the upper pressure compensation cavity 12 and the pressure compensation cavity 13, a pressure compensation auxiliary channel 16 is arranged on the pressure compensation table 15, the pressure compensation cavity 13 is communicated with a rear pressure compensation cavity 18 through the pressure compensation auxiliary channel 16, the water outlet of the rear pressure compensation cavity 18 is communicated with a turbulence cavity 20 positioned at the top of the pressure compensation micro-spray adapter 2, and the water outlet of the turbulence cavity 20 is communicated with the rotary micro-spray head 1.
In each of the above components, the inner diameter of the capillary interface 6 is 2mm, and the outside is a cone.
The pressure compensation table 15 is positioned on the body 8, and has a cylindrical boss with a diameter of 4-6 MM and a height of 2MM, and is provided with a pressure compensation auxiliary channel 16 in the center, wherein the diameter of the pressure compensation auxiliary channel 16 is 1-3 MM.
The pressure compensation auxiliary channel 16 is positioned on the plane of the pressure compensation table 15, has the width of 0.5-1 mm, has the length consistent with the diameter of the pressure compensation table 15, and has the depth of 0.3-1 mm.
The pressure compensation chip 10 is an elastic chip with a waist-shaped structure, has a thickness of 1.2mm, is positioned on the pressure compensation placing table 19, separates the upper pressure compensation cavity 12 from the pressure compensation cavity 13, and ensures the peripheral sealing.
The upper pressure compensation chamber 12 is a chamber formed by the outer surface of the pressure compensation sheet 10 and the inner wall of the housing 7, and is communicated with the lower pressure compensation 17 through a flow channel.
The pressure compensation chamber 13 is located between the upper pressure compensation chamber 12, the lower pressure compensation chamber 17, and the rear pressure compensation chamber 18. The pressure compensation chamber 13 communicates with the lower pressure compensation chamber 17 through the through hole 14, and the pressure compensation chamber 13 communicates with the rear pressure compensation chamber 18 through the pressure compensation sub-passage 16.
The pressure compensation chamber 17 penetrates the upper and lower parts of the body 8, and a part of the pressure compensation chamber is arranged below the pressure compensation chamber in parallel with the rear pressure compensation chamber 18.
The back pressure compensating chamber 18 has a W-shaped flow path, and water flows from the pressure compensating auxiliary channel 16 in the middle of the pressure compensating table 15 into the center of the inverted W-shaped flow path, and then flows out from the two sides v to the turbulence chamber 20.
The pressure compensation-chip placing stage 19 is 2mm higher in horizontal height than the 15 pressure compensation stage.
The turbulent flow cavity 20 is provided with 8 regularly distributed flow guide ribs on the conical surface thereof, and the steady flow water is rapidly guided and injected into the water outlet 21 of the nozzle 3.
The diameter of the water outlet 21 of the nozzle 3 is 0.5-1.4 mm, the inlet is large, the outlet is small, so that the flow speed of water flow is fast, and a high-speed small water column is formed to be injected into the flow channel of the nozzle disc to provide the rotating force of the nozzle disc.
The pressure compensation process of the invention is as follows:
1) After the pressurized water enters the lower pressure compensation cavity 17 through the capillary tube interface 6, one part of the pressurized water enters the upper pressure compensation cavity 12 through the flow passage, and the other part of the pressurized water enters the pressure compensation cavity 13 through the through hole 14;
2) Because the cross-sectional area of the flow channel of the lower pressure compensation cavity 17 communicated with the upper pressure compensation cavity 12 is larger than the cross-sectional area of the through hole 14, the water inlet speed of the lower pressure compensation cavity 17 is larger than the water inlet speed of the pressure compensation cavity 13, so that the water pressure in the upper pressure compensation cavity 12 is larger than the water pressure in the pressure compensation cavity 13, and the pressure compensation chip 10 positioned between the upper pressure compensation cavity 12 and the pressure compensation cavity 13 deforms to a large extent in the direction of the pressure compensation table 15 under the action of the water pressure difference;
3) After the upper pressure compensation cavity 12 and the pressure compensation cavity 13 are filled with water, the upper pressure compensation cavity 12 and the pressure compensation cavity 13 are communicated with each other, so that the water pressures of the upper pressure compensation cavity 12 and the pressure compensation cavity 13 tend to be consistent, and the deformation of the pressure compensation chip 10 can be recovered;
4) In the above process, part of the pressure water in the pressure compensation chamber 13 enters the rear pressure compensation chamber 18 through the pressure compensation auxiliary channel 16, so that the water pressure of the pressure compensation chamber 13 is slightly smaller than that of the upper pressure compensation chamber 12, and the pressure compensation chip 10 can maintain small deformation finally.
In a certain small pressure range (5-200 kPa), water flow can only enter the rear pressure compensation cavity 18 through the complete pressure compensation auxiliary channel 16, and in a 0.5-2 kPa range, the relative energy of 0.5kPa at the time of 2kPa is counteracted through the design of a w-shaped runner, so that the stability of flow is maintained;
when the pressure is within a relatively large pressure range (200-400 Pa), the pressure compensation chip 10 is beyond the conventional deformation law and bears huge abnormal deformation, particularly, the position where the pressure difference at the pressure compensation auxiliary channel 16 is large, the deformation position of the pressure compensation chip 10 is partially entered into the pressure compensation auxiliary channel 16 along with the pressure increase, and the cross section area and the volume in the pressure compensation auxiliary channel 16 are changed, so that the matching of the cross section areas of different pressure compensation auxiliary channels 16 under different relative high pressures with the high pressure and the high flow rate is achieved, and finally, the consistency of the flow is also achieved.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. The pressure compensation micro-spray water device is characterized by comprising a pressure compensation micro-spray adapter (2) and a rotary micro-spray head (1) arranged on the pressure compensation micro-spray adapter (2);
the interior of the pressure compensation micro-spray adapter (2) is a cavity, a pressure compensation table (15) is arranged in the cavity, a pressure compensation chip (10) is arranged on the pressure compensation table (15), an upper pressure compensation cavity (12) is formed by the pressure compensation chip (10) and the inner wall of one side of the pressure compensation micro-spray adapter (2), a pressure compensation cavity (13) is formed by the pressure compensation chip (10) and the pressure compensation table (15) on the inner side, a rear pressure compensation cavity (18) is formed by the pressure compensation table (15) and the inner wall of the other side of the pressure compensation micro-spray adapter (2), and the cavities below the upper pressure compensation cavity (12) and the pressure compensation chip (10) are formed into a lower pressure compensation cavity (17);
the water inlet end of the lower pressure compensation cavity (17) is communicated with a capillary tube interface (6) positioned at the bottom of the pressure compensation micro-spray adapter (2), the water outlet end of the lower pressure compensation cavity (17) is respectively communicated with an upper pressure compensation cavity (12) and a pressure compensation cavity (13), a pressure compensation auxiliary channel (16) is arranged on the pressure compensation table (15), the pressure compensation cavity (13) is communicated with a rear pressure compensation cavity (18) through the pressure compensation auxiliary channel (16), the water outlet of the rear pressure compensation cavity (18) is communicated with a turbulence cavity (20) positioned at the top of the pressure compensation micro-spray adapter (2), the water outlet of the turbulence cavity (20) is communicated with the rotary micro-spray head (1),
the rotary micro-spray head (1) comprises a spray nozzle (3), a frame (4) positioned above the spray nozzle and a spray disc (5) movably connected with the frame (4), a water inlet of the spray nozzle (3) is communicated with a turbulent flow cavity (20), a water outlet of the spray nozzle (3) is communicated with a flow channel (40) of the spray disc (5), the angle of the flow channel (40) is tangential to the circumference,
the pressure compensation process of the pressure compensation micro-spray adapter (2) is as follows:
1) after the pressurized water enters the lower pressure compensation cavity (17) through the capillary tube interface (6), one part of the pressurized water enters the upper pressure compensation cavity (12) through the flow passage, and the other part of the pressurized water enters the pressure compensation cavity (13) through the through hole (14);
2) Because the cross-sectional area of the flow channel of the lower pressure compensation cavity (17) communicated with the upper pressure compensation cavity (12) is larger than that of the through hole (14), the water inlet speed of the lower pressure compensation cavity (17) is larger than that of the pressure compensation cavity (13), so that the water pressure in the upper pressure compensation cavity (12) is larger than that in the pressure compensation cavity (13), and the pressure compensation chip (10) positioned between the upper pressure compensation cavity (12) and the pressure compensation cavity (13) deforms to a large extent in the direction of the pressure compensation table (15) under the action of the water pressure difference;
3) After the upper pressure compensation cavity (12) and the pressure compensation cavity (13) are filled with water, the upper pressure compensation cavity (12) and the pressure compensation cavity (13) are communicated with each other, so that the water pressures of the upper pressure compensation cavity (12) and the pressure compensation cavity (13) tend to be consistent, and the deformation of the pressure compensation chip (10) can be recovered;
4) In the process, part of pressure water in the pressure compensation cavity (13) can enter the rear pressure compensation cavity (18) through the pressure compensation auxiliary channel (16), so that the water pressure of the pressure compensation cavity (13) is slightly smaller than that of the upper pressure compensation cavity (12), the pressure compensation chip (10) can be kept deformed to a small extent finally,
the main body of the back pressure compensation cavity (18) is of a W-shaped structure, the water inlet of the back pressure compensation cavity (18) is positioned in the middle of the W-shaped structure, the water outlet of the back pressure compensation cavity (18) is positioned at two ends of the W-shaped structure,
the pressure compensation chip (10) is an elastic chip with a waist-shaped structure and is positioned on the pressure compensation placing table (19) to separate the upper pressure compensation cavity (12) from the pressure compensation cavity (13) and ensure the peripheral sealing,
the upper pressure compensation cavity (12) is a cavity formed by the outer surface of the pressure compensation sheet (10) and the inner wall of the shell (7) and is communicated with the lower pressure compensation (17) through a flow channel;
the pressure compensation cavity (13) is positioned between the upper pressure compensation cavity (12), the lower pressure compensation cavity (17) and the rear pressure compensation cavity (18), the pressure compensation cavity (13) is communicated with the lower pressure compensation cavity (17) through a through hole (14), the pressure compensation cavity (13) is communicated with the rear pressure compensation cavity (18) through a pressure compensation auxiliary channel (16),
the pressure compensation cavity (17) penetrates through the upper part and the lower part of the body (8), and a part of the pressure compensation cavity and the rear pressure compensation cavity (18) are distributed below the pressure compensation cavity in parallel;
the main body of the rear pressure compensation cavity (18) is in a W-shaped flow channel shape, and water flow enters the center of the inverted W-shaped flow channel from the pressure compensation auxiliary channel (16) in the middle of the pressure compensation table (15) and then flows out from the two sides v to enter the turbulence cavity (20).
2. The pressure compensation micro-spray water heater according to claim 1, wherein the pressure compensation micro-spray adapter (2) comprises a shell (7) and a body (8), a group of symmetrically distributed grooves (30) are formed in the opening of the shell (7), locking bosses (31) matched with the grooves (30) are formed in the body (8), and the shell (7) and the body (8) are fixedly connected through a clamping structure formed by the grooves (30) and the locking bosses (31).
3. Pressure compensating micro-sprinkler according to claim 1, characterized in that a number of flow guiding ribs are provided on the conical surface of the turbulence chamber (20).
4. Pressure compensated micro-sprinkler according to claim 1, characterized in that the aperture of the water inlet of the nozzle (3) is larger than the aperture of the water outlet of the nozzle (3) for providing a flow channel (40) for high-speed water flow impinging on the sprinkler disc (5).
CN201810728735.4A 2018-07-05 2018-07-05 Pressure compensation micro-sprinkling irrigation water device Active CN108812218B (en)

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CN108812218B true CN108812218B (en) 2023-09-15

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CN102527532A (en) * 2012-01-11 2012-07-04 西北农林科技大学 High-flow pressure-compensated drip irrigation emitter
CN202876972U (en) * 2012-11-08 2013-04-17 大庆达华灌溉设备有限公司 Drip irrigation dripping head
CN202823683U (en) * 2012-11-08 2013-03-27 大庆达华灌溉设备有限公司 Multi-point drip irrigation emitter
CN103053387A (en) * 2013-01-11 2013-04-24 中国农业大学 Capillary inlet flow regulator
CN103062466A (en) * 2013-01-11 2013-04-24 李光永 Micro-irrigation capillary pipe inlet flow adjuster
CN105307778A (en) * 2013-02-08 2016-02-03 雨鸟公司 Sprinkler with brake assembly
CN103240199A (en) * 2013-04-11 2013-08-14 王思源 Dripless pressure-stabilized sprinkler
CN204929868U (en) * 2015-09-02 2016-01-06 沈阳远大智能高科农业有限公司 A kind of pressure compensation antidrip water dropper
CN206808289U (en) * 2017-03-01 2017-12-29 上海华维节水灌溉股份有限公司 A kind of pressure-compensating water dropper with self-cleaning function
CN107442309A (en) * 2017-10-11 2017-12-08 河海大学 A kind of double branch support rotating mini sprinklers
CN207491707U (en) * 2017-10-22 2018-06-15 新疆天业节水灌溉股份有限公司 A kind of flow adjustable pressure compensation type emitter
CN208624275U (en) * 2018-07-05 2019-03-22 华维节水科技集团股份有限公司 A kind of pressure compensation microspray irrigation hydrophone

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