CN109169198B - Multilayer sand screen package pipe and multilayer sand screen package pipe irrigation system - Google Patents
Multilayer sand screen package pipe and multilayer sand screen package pipe irrigation system Download PDFInfo
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- CN109169198B CN109169198B CN201810939865.2A CN201810939865A CN109169198B CN 109169198 B CN109169198 B CN 109169198B CN 201810939865 A CN201810939865 A CN 201810939865A CN 109169198 B CN109169198 B CN 109169198B
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- 239000004576 sand Substances 0.000 title claims abstract description 257
- 230000002262 irrigation Effects 0.000 title claims abstract description 96
- 238000003973 irrigation Methods 0.000 title claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 230000008595 infiltration Effects 0.000 claims abstract description 26
- 238000001764 infiltration Methods 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000001914 filtration Methods 0.000 claims description 15
- 210000001503 joint Anatomy 0.000 claims description 11
- 239000012466 permeate Substances 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003621 irrigation water Substances 0.000 abstract 5
- 239000000835 fiber Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- -1 and meanwhile Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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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
- A01G25/06—Watering arrangements making use of perforated pipe-lines located in the soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/04—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls
- B01D24/08—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls the filtering material being supported by at least two pervious coaxial walls
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cultivation Of Plants (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to the technical field of high-efficiency water-using agricultural water conservation, in particular to a multilayer sand screen coated pipe and a multilayer sand screen coated pipe irrigation system, which comprise an infiltration irrigation water pipe, wherein an infiltration hole is formed in the infiltration irrigation water pipe, a coarse sand layer, a medium sand layer and a fine sand layer with the sand grain diameters sequentially reduced are sequentially arranged around the infiltration irrigation water pipe outwards, the coarse sand layer and the medium sand layer are separated by a first sand screen, the medium sand layer and the fine sand layer are separated by a second sand screen, a third sand screen is arranged outside the fine sand layer, an end sealing plate is sleeved at the end part of the infiltration irrigation water pipe, and is respectively and vertically connected with the infiltration irrigation water pipe, the first sand screen, the second sand screen and the third sand screen, the flow rate of water flow is controllable, the water in the water pipe is uniformly infiltrated and irrigated towards the periphery, the infiltration irrigation efficiency is high, and the anti-blocking effect is good.
Description
Technical Field
The invention relates to the technical field of high-efficiency water-using agricultural water conservation, in particular to a multilayer sand screen coated pipe and a multilayer sand screen coated pipe irrigation system.
Background
The infiltrating irrigation is a kind of underground micro irrigation, which is to transport water by low pressure pipeline, then to penetrate water into soil at fixed time and quantity according to the growth water demand of crops by irrigation device (microporous infiltrating irrigation pipe) buried in the active layer of crop root system. Therefore, infiltrating irrigation can be seen as a special form of drip irrigation, also known as subsurface drip irrigation. Compared with other irrigation technologies, the infiltrating irrigation technology has the advantages of water saving, land saving, labor saving, low energy consumption and the like, and becomes a main measure in the water-saving irrigation technology. However, in the instant of stopping the existing infiltrating irrigation pipeline at every time, the pipeline can form a reverse suck-back problem, negative pressure formed by the reverse suck-back can cause slurry at a seepage port of the branch pipe to be sucked into the branch pipe, and the seepage port of the branch pipe is blocked after drying, so that further use is influenced.
Based on the above, the invention patent with application number 201710247208.7 discloses a multi-core infiltrating irrigation system and a multi-core infiltrating irrigation belt, which solves the problem of back suction and blockage of branch pipes, but the multi-core infiltrating irrigation belt in the invention patent slowly permeates through the water storage property of fibers, firstly, the water permeation speed is slow due to the infiltration of the fibers, the water pressure is reduced when reaching the tail end of the fibers, the permeation speed is slower, and the requirement of crop irrigation on water cannot be met; secondly, the flow velocity of the water subjected to infiltration irrigation through the fibers is uncontrollable, only one water seepage velocity can be kept all the time, and the infiltration irrigation velocity cannot be adjusted according to the soil environment.
Disclosure of Invention
Aiming at the defects and problems of the existing irrigation system, the invention provides a multilayer sand screen coated pipe and a multilayer sand screen coated pipe irrigation system.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a multilayer sand net bag pipe, includes filtration irrigation center delivery pipe, it has the seepage hole to open on the filtration irrigation center delivery pipe, outwards has set gradually the coarse sand layer that sand grain diameter reduces in proper order, well sand layer and fine sand layer around filtration irrigation center delivery pipe, separate through first sand screen between coarse sand layer and the well sand layer, separate through the second sand screen between well sand layer and the fine sand layer, be provided with the third sand screen outside the fine sand layer, the mesh diameter of first sand screen is less than the sand grain diameter of well sand layer, the mesh diameter of second sand screen, third sand screen all is less than the sand grain diameter of fine sand layer, the water inlet pipe joint is connected to the head end of filtration irrigation center delivery pipe, and the tail end cover is equipped with the end shrouding, and the end shrouding is connected with filtration irrigation center delivery pipe, first sand screen, second sand screen, third sand screen perpendicularly respectively.
Foretell a multilayer sand net drape pipe, the seepage hole evenly sets up in the both sides of filtration irrigation center delivery pipe.
The end sealing plate is coaxially provided with three annular grooves, and the end parts of the first sand net, the second sand net and the third sand net are respectively clamped in the three annular grooves.
The end parts of the infiltrating irrigation central water supply pipes are respectively provided with a butt-joint sleeve head, two adjacent infiltrating irrigation central water supply pipes are connected through the butt-joint sleeve heads, and the butt-joint sleeve heads are also provided with fixing belts.
Foretell multilayer sand screen package pipe, the outside upper end of third sand screen is provided with the sunshade, the sunshade is the arc cover of laminating with third filter screen upper portion.
Foretell multilayer sand screen package pipe, the outside cover of third sand screen is equipped with the floor, the bilateral symmetry of floor is provided with the floor and oozes the seam.
A multilayer sand net bag pipe irrigation system is characterized in that water stored in a water storage tank passes through a filtering device and then sequentially passes through a main pipe and a plurality of branch pipes to be irrigated in a seepage mode into a stratum, valves are arranged on relevant pipelines of the main pipe and the branch pipes, the branch pipes are multilayer sand net bag pipes, each multilayer sand net bag pipe comprises an infiltration irrigation center water supply pipe, seepage holes are formed in the infiltration irrigation center water supply pipe, a coarse sand layer, a medium sand layer and a fine sand layer, the diameters of sand grains of the coarse sand layer and the medium sand layer are sequentially reduced outwards around the infiltration irrigation center water supply pipe, the coarse sand layer and the medium sand layer are separated through a first sand net, the medium sand layer and the fine sand layer are separated through a second sand net, a third sand net is arranged outside the fine sand layer, the diameter of meshes of the first sand net is smaller than that of the medium sand layer, the diameters of meshes of the second sand net and the third sand net are smaller than that of the fine sand layer, and the head end of the infiltration irrigation, the tail end part is sleeved with an end sealing plate which is respectively and vertically connected with the infiltrating irrigation central water supply pipe, the first sand screen, the second sand screen and the third sand screen.
The main pipe is connected with the multilayer sand net bag pipe through the short branch pipe, the short branch pipe is uniformly provided with holes, butt joint sleeves are sleeved at the holes, and the infiltrating irrigation center water supply pipe is hermetically connected with the short branch pipe through the butt joint sleeves.
Foretell a multilayer sand screen package pipe irrigation system, the delivery port upside of cistern bottom is provided with the coarse filter device, and the delivery port of cistern is in proper order through valve and filter back and be responsible for the intercommunication.
The invention has the beneficial effects that: according to the multilayer sand net bag pipe and the multilayer sand net bag pipe irrigation system, the coarse sand layer, the middle sand layer and the fine sand layer are sequentially arranged around the central water supply pipe of the infiltrating irrigation, the coarse sand layer, the middle sand layer and the fine sand layer respectively form the water storage layer, the water passing layer and the outermost seepage layer, water in the central water supply pipe of the infiltrating irrigation smoothly passes through the water storage layer, the water passing layer and the outermost seepage layer from inside to outside, no blockage occurs, the water flow speed is high, and the infiltrating irrigation efficiency is high; the sand layers are annularly distributed around the water supply pipe at the center of the infiltrating irrigation, the gaps of the sand layers are more and uniform, compared with the structure that water outlets are arranged at two sides of a water outlet pipe at present, the infiltrating irrigation device drains water through the gaps of the sand layers, the surface area of the infiltrating irrigation is very large, the water outlets on the surface of the infiltrating irrigation are small and dense, the water outlet area is large and slow, the uniform infiltrating irrigation of the water flow in the water pipe to the periphery can be ensured, and the infiltrating irrigation effect is good; meanwhile, compared with the fiber layer infiltrating irrigation technology, the infiltrating irrigation central water supply pipe pressure-increasing device overcomes the defect that the infiltrating irrigation flow velocity cannot be changed during infiltrating irrigation through the fiber layer, can increase the flow velocity by pressurizing the infiltrating irrigation central water supply pipe, reduces the flow velocity by depressurizing the infiltrating irrigation central water supply pipe, can adjust the water flow velocity of the infiltrating irrigation central water supply pipe at any time, realizes controllable flow velocity, adapts to the requirements of different weather conditions, different soil environments and different crop growth on water, and has wide practicability; in addition, the sand layer is not easy to be blocked by soil due to the self characteristics of the sand layer, the phenomenon that the branch pipe is blocked by reverse suck-back of mud at a seepage port due to negative pressure formed by a pipeline at the moment of stopping at each time is effectively avoided, and the multilayer sand-net coated pipe has good mud blocking prevention performance.
Drawings
FIG. 1 is a schematic structural diagram of a multi-layer sand-net coated pipe of the invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 is a schematic structural view of an end closure plate;
FIG. 4 is a schematic cross-sectional view showing the structure of example 2;
FIG. 5 is a schematic structural view of example 3 of the present invention;
FIG. 6 is a schematic view of a multi-layer sand screen pipe-wrapped irrigation system according to the present invention;
in the figure: 1-infiltrating irrigation central water supply pipe, 2-seepage hole, 3-coarse sand layer, 4-medium sand layer, 5-fine sand layer, 6-first sand net, 7-second sand net, 8-third sand net, 9-end sealing plate, 10-annular groove, 11-butt joint sleeve head, 12-fixing band, 13-sun shade, 14-main pipe, 15-valve, 16-filter, 17-short branch pipe, 18-butt joint sleeve pipe, 19-multi-rib seepage seam and 20-rib plate.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example 1: a multi-layer sand net coated pipe comprises an infiltrating irrigation central water supply pipe 1, seepage holes 2 are uniformly formed in two sides of the infiltrating irrigation central water supply pipe 1, water flows flow out of the seepage holes 2, a coarse sand layer 3, a medium sand layer 4 and a fine sand layer 5 are sequentially arranged outwards around the pipe wall of the infiltrating irrigation central water supply pipe 1, the sand diameters of the coarse sand layer, the medium sand layer and the fine sand layer are sequentially reduced, the coarse sand layer 3 and the medium sand layer 4 are separated through a first sand net 6, the medium sand layer 4 and the fine sand layer 5 are separated through a second sand net 7, a third sand net 8 is arranged outside the fine sand layer 5, the mesh diameter of the first sand net 6 is smaller than that of the medium sand layer 4, sand of the medium sand layer 4 is prevented from entering the coarse sand layer 3, the mesh diameters of the second sand net 7 and the third sand net 8 are both smaller than that of the fine sand layer 5, sand layer 5 is prevented from entering the medium sand layer 4, and fine sand in the third sand 8 is also prevented from leaking outside, the water storage layer is formed by larger gaps among sand grains in the coarse sand layer 3 and can store more water, the water permeable layer is formed by smaller gaps among the sand grains in the medium sand layer 4 and mainly has the main function of allowing water in the water storage layer to pass through, the sand grains in the fine sand layer 5 have the smallest diameter, so that the outermost water permeable layer is formed by the smallest gaps among the sand grains, water can permeate into soil after water permeates through the fine sand layer, and the water outlet area is large due to the small and dense gaps in the fine sand layer 5, so that water in the water pipe can be uniformly infiltrated all around, and the infiltration irrigation effect is good; an end sealing plate 9 is sleeved at the end part of the infiltrating irrigation central water supply pipe 1, the end sealing plate 9 is an annular flexible plate with certain support and bending performance, the central thread of the end sealing plate is installed on the pipe wall of the infiltrating irrigation central water supply pipe, the end sealing plate 9 is respectively and vertically connected with the infiltrating irrigation central water supply pipe 1, the first sand screen 6, the second sand screen 7 and the third sand screen 8, in the embodiment, three annular grooves 10 are formed in the end sealing plate 9 by taking the central position as an axis, and correspond to the positions of the first sand screen, the second sand screen and the third sand screen respectively, so that the end parts of the first sand screen 6, the second sand screen 7 and the third sand screen 8 can be respectively arranged in the three annular grooves, and the annular grooves 10 are used for clamping sand in the sand screens and preventing sand from leaking outwards; the end of the central water supply pipe 1 for filtration irrigation is extended out beyond the end sealing plate 9, the end of the central water supply pipe 1 for filtration irrigation is sleeved with a butt-joint sleeve head 11, two adjacent central water supply pipes are connected through the butt-joint sleeve head 11, and a fixing belt 12 is tied on the butt-joint sleeve head 11 for reinforcement.
Example 2: the multilayer sand-coated pipe of the present embodiment will be described centering on the difference from embodiment 1;
as shown in fig. 4, the sun shade 13 is installed at the upper end of the outside of the third sand net 8, the sun shade is an arc-shaped shade attached to the upper portion of the third sand net, two sides of the sun shade 13 are welded or fixed to the third sand net 8 through iron wires, the sun shade is used for reducing direct evaporation of water, and meanwhile, water flow can be prevented from being sprayed out from the upper end of the fine sand layer when water pressure is too high.
Example 3: the multilayer sand-coated pipe of the present embodiment will be described centering on the difference from embodiment 1;
as shown in fig. 5, the third sand screen 8 is externally sleeved with a ribbed plate 20, ribbed plate infiltration seams 19 are symmetrically arranged on two sides of the ribbed plate 20, and the multi-ribbed infiltration seams 19 have a directional infiltration function and infiltrate into plant root regions on two sides of the multi-layer sand screen coated pipe.
Example 4: the multilayer sand net pipe-wrapped irrigation system of the present embodiment is mainly explained with the difference from embodiment 1;
a multilayer sand net bag irrigation system is disclosed, as shown in figure 6, the water stored in the water storage tank passes through a filter device and then sequentially passes through a main pipe 14 and a plurality of branch pipes to infiltrate and irrigate into the ground, valves 15 are arranged on the relevant pipelines of the main pipe and the branch pipes, wherein the branch pipes are multilayer sand net bag pipes of the invention, the multilayer sand net bag pipes comprise an infiltration irrigation central water supply pipe 1, seepage holes 2 are uniformly arranged on two sides of the infiltration irrigation central water supply pipe 1, a coarse sand layer 3, a medium sand layer 4 and a fine sand layer 5 with sequentially reduced sand grain diameters are sequentially arranged around the infiltration irrigation central water supply pipe 1, the coarse sand layer is separated from the medium sand layer through a first sand net 6, the medium sand layer is separated from the fine sand layer through a second sand net 7, a third sand net 8 is arranged outside the fine sand layer, the mesh diameter of the first sand net is smaller than that of the medium sand layer, the mesh diameters of the second sand net and the third sand net are smaller than that of the fine sand layer, the end part of the filtration irrigation central water supply pipe is sleeved with an end sealing plate 9, and the end sealing plate is respectively and vertically connected with the filtration irrigation central water supply pipe, the first sand net, the second sand net and the third sand net.
Wherein, the main pipe 14 is connected with the multilayer sand net bag pipe through a short branch pipe 17, the short branch pipe 17 is uniformly provided with holes, and the holes are sleeved with butt joint sleeves 18, the butt joint sleeves are three-way pipes, and the infiltrating irrigation center water supply pipe 1 is hermetically connected with the short branch pipe 17 through the butt joint sleeves 18.
In addition, a rough filtering device is arranged on the upper side of a water outlet at the bottom of the reservoir, and the water outlet of the reservoir is communicated with the main pipe 14 after sequentially passing through a valve 15 and a filter 16.
Claims (7)
1. The utility model provides a multilayer sand screen package pipe which characterized in that: the infiltrating irrigation central water supply pipe comprises an infiltrating irrigation central water supply pipe, seepage holes are formed in the side wall of the infiltrating irrigation central water supply pipe, the seepage holes are uniformly arranged on two sides of the infiltrating irrigation central water supply pipe, a coarse sand layer, a medium sand layer and a fine sand layer which are sequentially reduced in sand grain diameter are sequentially arranged from an inner layer to an outer layer around the infiltrating irrigation central water supply pipe, the coarse sand layer and the medium sand layer are separated by a first sand net, the medium sand layer and the fine sand layer are separated by a second sand net, a third sand net is arranged outside the fine sand layer, the mesh diameter of the first sand net is smaller than that of the medium sand layer, the mesh diameters of the second sand net and the third sand net are smaller than that of the fine sand layer, so that a water storage layer is formed by larger gaps among sand grains, more water can be stored, the sand diameter of the medium sand layer is relatively smaller, so that a water passing layer is formed by smaller gaps among the sand grains, and the main function of allowing water, the diameter of sand grains in the fine sand layer is the smallest, so that the gaps among the sand grains are the smallest to form the outermost water seepage layer, and water can permeate into soil after water flow permeates through the fine sand layer; the third sand net is externally sleeved with a ribbed plate, ribbed plate seepage seams are symmetrically arranged on two sides of the ribbed plate, the head end of the infiltrating irrigation central water supply pipe is connected with a water inlet pipe joint, the tail end of the infiltrating irrigation central water supply pipe is sleeved with an end sealing plate, and the end sealing plate is respectively and vertically connected with the infiltrating irrigation central water supply pipe, the first sand net, the second sand net and the third sand net.
2. The sand screen pipe of claim 1, wherein: the end sealing plate is coaxially provided with three annular grooves, and the end parts of the first sand net, the second sand net and the third sand net are respectively clamped in the three annular grooves.
3. The sand screen pipe of claim 1, wherein: the end parts of the filtration irrigation central water supply pipes are respectively provided with a butt-joint sleeve joint, two adjacent filtration irrigation central water supply pipes are connected through the butt-joint sleeve joints, and the butt-joint sleeve joints are also provided with fixing belts.
4. The sand screen pipe of claim 1, wherein: the upper end of the outside of the third sand screen is provided with a sunshade which is an arc-shaped cover attached to the upper part of the third sand screen.
5. The utility model provides a multilayer sand net bag pipe irrigation system, the water storage in the cistern passes through filter equipment back in proper order through being responsible for and many spinal branchs pipe to the infiltration irrigation in the stratum, is provided with valve, its characterized in that on being responsible for and the relevant pipeline of multi-branch pipe: the branch pipe is a multilayer sand net bag pipe which comprises an infiltration irrigation central water supply pipe, seepage holes are formed in the side wall of the infiltration irrigation central water supply pipe and are uniformly arranged on two sides of the infiltration irrigation central water supply pipe, a coarse sand layer, a medium sand layer and a fine sand layer are sequentially arranged around the infiltration irrigation central water supply pipe from the inner layer to the outer layer, the sand diameters of the coarse sand layer and the medium sand layer are sequentially reduced, the coarse sand layer and the medium sand layer are separated by a first sand net, the medium sand layer and the fine sand layer are separated by a second sand net, a third sand net is arranged outside the fine sand layer, the mesh diameter of the first sand net is smaller than that of the medium sand layer, the mesh diameters of the second sand net and the third sand net are smaller than that of the fine sand layer, so that a water storage layer is formed by larger gaps among the sand grains, more water can be stored, the sand diameter of the medium sand layer is relatively smaller, and a water passing layer is formed by smaller gaps among the sand grains, the main function is to allow water in the water storage layer to pass through, and the diameter of sand grains in the fine sand layer is the smallest, so that the gaps among the sand grains are the smallest to form the outermost water seepage layer, and water can permeate into soil after water flow permeates through the fine sand layer; the third sand net is externally sleeved with a ribbed plate, ribbed plate seepage seams are symmetrically arranged on two sides of the ribbed plate, the head end of the infiltrating irrigation central water supply pipe is connected with a water inlet pipe joint, the tail end of the infiltrating irrigation central water supply pipe is sleeved with an end sealing plate, and the end sealing plate is respectively and vertically connected with the infiltrating irrigation central water supply pipe, the first sand net, the second sand net and the third sand net.
6. The system according to claim 5, wherein: the main pipe is connected with the multilayer sand net bag pipe through a short branch pipe, holes are uniformly formed in the short branch pipe, a butt joint sleeve is sleeved at the holes, and the infiltrating irrigation center water supply pipe is connected with the short branch pipe in a sealing mode through the butt joint sleeve.
7. The system according to claim 5, wherein: the delivery port upside of cistern bottom is provided with the coarse filtration device, and the delivery port of cistern is in proper order through valve and filter back with be responsible for the intercommunication.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810939865.2A CN109169198B (en) | 2018-08-17 | 2018-08-17 | Multilayer sand screen package pipe and multilayer sand screen package pipe irrigation system |
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| CN201810939865.2A CN109169198B (en) | 2018-08-17 | 2018-08-17 | Multilayer sand screen package pipe and multilayer sand screen package pipe irrigation system |
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| CN109169198B true CN109169198B (en) | 2021-01-19 |
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| CN112145435A (en) * | 2020-10-12 | 2020-12-29 | 辽宁工程技术大学 | Screw air compressor waste heat recovery recycles device |
| CN112470770B (en) * | 2020-11-25 | 2022-04-05 | 济南市第二农业科学研究院(济南市现代农业科技成果综合应用示范基地) | Ginger seedling cultivation device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2419819Y (en) * | 2000-05-19 | 2001-02-21 | 杨荣华 | Infiltrating irrigation water pipe for farm |
| CN200945386Y (en) * | 2006-08-02 | 2007-09-12 | 叶乃慈 | Water purification filtering device |
| CN100512628C (en) * | 2006-09-29 | 2009-07-15 | 太原理工大学 | Clogproof filtration irrigation composite tube buried ground and technological process |
| CN205511294U (en) * | 2015-12-31 | 2016-08-31 | 瑞泽生物科技(苏州)有限公司 | Special core nest of tubes of processing apparatus of agricultural irrigation water prefaceization |
| CN107021529A (en) * | 2017-04-06 | 2017-08-08 | 刘斌 | A kind of high pressure resistant filter core of high intensity |
| CN107094593B (en) * | 2017-04-17 | 2018-04-06 | 华北水利水电大学 | Multicore infiltrating irrigation system and multicore infiltrating irrigation band |
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