CN113274785B - Immersion type suspension solid matter enrichment flow guide cover device - Google Patents
Immersion type suspension solid matter enrichment flow guide cover device Download PDFInfo
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- CN113274785B CN113274785B CN202110548234.XA CN202110548234A CN113274785B CN 113274785 B CN113274785 B CN 113274785B CN 202110548234 A CN202110548234 A CN 202110548234A CN 113274785 B CN113274785 B CN 113274785B
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- air guide
- guide sleeve
- solid matter
- suspended solid
- water outlet
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- 239000007787 solid Substances 0.000 title claims abstract description 62
- 239000000725 suspension Substances 0.000 title claims abstract description 6
- 238000007654 immersion Methods 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000002861 polymer material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 241000251468 Actinopterygii Species 0.000 description 18
- 238000009360 aquaculture Methods 0.000 description 5
- 244000144974 aquaculture Species 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- 239000011343 solid material Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 241000196252 Ulva Species 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 241000242583 Scyphozoa Species 0.000 description 2
- 208000034699 Vitreous floaters Diseases 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention provides an immersed suspension solid matter enrichment air guide sleeve device, and relates to engineering equipment and the field of fluid machinery. The immersed suspended solid matter enrichment flow guide cover device comprises a flow guide cover, wherein the flow guide cover is arranged at the input end of suspended solid matter treatment equipment in a flow field in accordance with the flow field direction, and the cross section of the flow guide cover is gradually reduced from a feed port to a discharge port to form a horn shape; the annular water outlet screen is arranged annularly and surrounds a feed inlet of the suspended solid matter treatment equipment, one end of the annular water outlet screen is fixed on the suspended solid matter treatment equipment, and the other end of the annular water outlet screen is connected with the connecting flange; and the connecting flange is used for connecting the annular water outlet screen and the discharge hole of the air guide sleeve. The immersed suspended solid matter enrichment air guide sleeve device has a siphon effect on suspended solid matters, so that the suspended solid matters can automatically and rapidly reach the feed inlet of solid matter treatment equipment connected with the discharge outlet of the air guide sleeve, and further treatment of the suspended solid matters is facilitated.
Description
Technical Field
The invention relates to a flow guide cover, in particular to an immersed suspended solid matter enrichment flow guide cover device, and belongs to the technical field of engineering equipment of fluid machinery.
Background
In production practice, there is a great need to collect, separate and further process solid matter suspended in a fluid. There are many ways, most commonly with various screening processes, but less commonly with continuous collection processes by immersion in a fluid. For the purpose of enriching solid substances, the inlet of such a device immersed in a fluid is usually large, while the outlet is small, and is connected to a material processing device through a small outlet.
Such an arrangement poses a serious problem in that the solid matter is easily retained at a narrow discharge port, so that the processing apparatus cannot normally operate at all. The fundamental reason is that the flow field is not smooth, but is not caused by material blockage. The main function of the material processing equipment is to process solid materials, and the fluid passing capacity is limited, so that the material processing equipment almost becomes a dead angle of a flow field at a narrow discharge port, and the flowability is poor, so that the material is retained at the dead angle, and the aim of smoothly processing the solid materials by the submerged equipment cannot be achieved.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the problems and provide an immersion type suspended solid matter enrichment air guide sleeve device to solve the problems that suspended solid matters are difficult to collect and limited in passing capacity, so that materials are retained and cannot be smoothly treated in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: an immersed suspended solid matter enrichment air guide sleeve device, comprising:
the flow guide cover is arranged at the input end of the suspended solid substance treatment equipment in the flow field, and the cross section of the flow guide cover is gradually reduced from the feed inlet to the discharge outlet to form a trumpet shape; the annular water outlet screen is arranged in an annular shape, and one end of the annular water outlet screen is arranged at a feed inlet of the suspended solid matter treatment equipment in a surrounding manner;
and the connecting flange is used for connecting the annular water outlet screen and the discharge hole of the air guide sleeve, and the other end of the annular water outlet screen is detachably connected with the connecting flange.
Preferably, the ratio of the mesh aperture of the annular water outlet screen to the average diameter of the suspended solid matter is not more than 0.2: 1.
Preferably, the material of the air guide sleeve is water-tight stainless steel or other corrosion-resistant polymer materials, and the diameter of the section of the discharge hole of the air guide sleeve is more than 2 times of the average diameter of the suspended solid substance.
Preferably, the inside of the air guide sleeve is provided with a smooth surface.
Preferably, the diameter of the flow guide cover is gradually reduced from the feed inlet to the discharge outlet, and the ratio of the cross-sectional area of the feed inlet to the cross-sectional area of the discharge outlet of the flow guide cover is greater than or equal to 10: 1.
the method for placing the immersed suspended solid matter enrichment air guide sleeve is characterized in that the air guide sleeve is arranged in a way of following the direction of a flow field, a feed inlet with a larger sectional area faces the incoming flow direction, and a discharge outlet with a smaller sectional area faces the outgoing direction of flow field fluid.
The invention provides an immersed suspension solid matter enrichment air guide sleeve device, which has the following beneficial effects:
1. according to the immersed type suspended solid matter enrichment air guide sleeve device, the sectional area of a discharge hole of an air guide sleeve is far smaller than that of a feed hole of the air guide sleeve, and an annular water outlet screen is connected to the discharge hole of the air guide sleeve, so that the smoothness of a flow field is guaranteed, pressure difference is formed at the relatively narrow position of the discharge hole throat, flow lines at the position of the discharge hole throat of the air guide sleeve are dense, the flow speed is high, a low-pressure area of the flow field relative to the position of the feed hole of the air guide sleeve is formed, a siphon effect is formed on suspended solid matters, the suspended solid matters can automatically and rapidly reach solid matter treatment equipment at the connection position of the discharge hole of the air guide sleeve, and further treatment of the suspended solid matters is facilitated.
2. The immersed suspended solid matter enrichment air guide sleeve device can automatically concentrate suspended solid matters in the air guide sleeve device by utilizing the fluid kinetic energy of the flow field, and the suspended solid matters are conveyed to the discharge port end of the air guide sleeve from the feed port end of the air guide sleeve and are smoothly treated by subsequent suspended solid matter treatment equipment. The device has the advantages of simplicity, high efficiency, no blockage and the like, and solves the problems that suspended solid substances in a flow field are difficult to collect, are easy to be retained and cannot smoothly reach treatment equipment.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 2. a pod; 3. a connecting flange; 4. and an annular water outlet screen.
Detailed Description
The embodiment of the invention provides an immersed suspension solid matter enrichment air guide sleeve device.
Please refer to fig. 1, which includes:
the flow guide cover 2 is arranged at the input end of the suspended solid substance treatment equipment in the flow field, and the cross section of the flow guide cover is gradually reduced from the feed inlet to the discharge outlet to form a trumpet shape; the device comprises an annular water outlet screen 4, wherein the annular water outlet screen 4 is arranged in an annular shape, and one end of the annular water outlet screen 4 is arranged around a feed port of the suspended solid matter treatment equipment;
and the connecting flange 3 is used for connecting the annular water outlet screen 4 with the discharge hole of the air guide sleeve 2, and the other end of the annular water outlet screen 4 is detachably connected with the connecting flange 3.
Preferably, the ratio of the mesh aperture of the annular water outlet screen 4 to the average diameter of the suspended solid matters is not more than 0.2: 1.
Preferably, the material of the air guide sleeve 2 is water-tight stainless steel or other corrosion-resistant polymer materials, and the diameter of the section of the discharge hole of the air guide sleeve 2 is more than 2 times of the average diameter of the suspended solid matter.
Preferably, the inside of the air guide sleeve 2 is provided with a smooth surface.
Preferably, the diameter of the air guide sleeve 2 is gradually reduced from the inlet to the outlet, and the ratio of the inlet cross-sectional area to the outlet cross-sectional area of the air guide sleeve 2 is greater than or equal to 10: 1.
a method for placing an immersed suspended solid matter enrichment air guide sleeve is characterized in that the air guide sleeve 2 is arranged in a mode of following the direction of a flow field, a feed inlet with a larger sectional area faces the incoming flow direction, and a discharge outlet with a smaller sectional area faces the outgoing direction of flow field fluid.
The working principle is as follows: the sectional area of the feed inlet of the air guide sleeve 2 is far larger than that of the discharge outlet of the air guide sleeve 2, the discharge outlet of the air guide sleeve 2 is subsequently connected with specific suspended solid matter treatment equipment, and an annular water outlet screen 4 is arranged on the periphery of the connection part of the discharge outlet of the air guide sleeve 2 and the suspended solid matter treatment equipment so as to keep the flow field smooth. Therefore, pressure difference is formed at two ends of the feed port and the discharge port of the air guide sleeve 2 due to different flow velocities, the flow velocity at the narrow throat part at the discharge port of the air guide sleeve 2 is larger, a relatively low-pressure siphon effect is generated, and suspended solid substances can be smoothly conveyed to the discharge port of the air guide sleeve 2 from the feed port of the air guide sleeve 2 and are treated by subsequently connected solid substance treatment equipment. The problem of material gathering and conveying in the flow field is solved, and the solid materials can automatically and smoothly reach the feeding port of the solid material processing equipment by utilizing the self action of the flow field, so that the function of automatically and continuously processing the materials by the equipment is realized.
In the process, the arrangement mode of the air guide sleeve 2 is set in a way of following the flow field direction, the feed inlet with larger sectional area faces the incoming flow direction, the discharge outlet direction is the going direction of flow field fluid, the diameter of the section of the discharge outlet of the air guide sleeve 2 is larger than 2d if the average diameter of the suspended solid matter is d, and the aperture of the annular water outlet screen 4 is smaller than 0.2 d. The suspended solid substances can not escape out through the annular water outlet screen 4 connected between the discharge port of the air guide sleeve 2 and the solid substance treatment equipment, so that the suspended solid substances are completely treated by the solid substance treatment equipment, but the smoothness of a flow field is guaranteed.
The invention can automatically concentrate the suspended solid matters in the flow field by utilizing the fluid kinetic energy of the flow field, automatically convey the suspended solid matters to the discharge port end of the air guide sleeve 2 from the feed port end of the air guide sleeve 2, and smoothly treat the suspended solid matters by subsequent treatment equipment. The device has the advantages of simplicity, high efficiency, no blockage and the like, and solves the problem that suspended solid substances in a flow field cannot smoothly reach treatment equipment.
Example 1
In the sea area where a certain industrial seawater cold source water taking channel is located, a plurality of marine organism outbreaks including jellyfishes, enteromorpha and the like occur routinely every year, wherein the enteromorpha is small in size and has an average diameter of about 2 cm. The cold source management party in the seawater industry adopts an intercepting bag net to intercept the fulminant marine organisms, adopts an underwater shredder to process the fulminant marine organisms such as the intercepted and gathered jellyfish, enteromorpha and the like at the bag of the intercepting net, and then carries out suction treatment. The result shows that marine organisms in the intercepting net bag can not smoothly reach the inlet of the underwater shredder, and no effective processing result exists. A stainless steel punching plate with the aperture of 0.4 cm is made into an annular water outlet screen 4 around a working toothed roller of the underwater shredder, and is assisted to be reinforced and fixed by stainless steel bars. Finally, a cubic cage with the size of 20 cm multiplied by 40 cm multiplied by 50 cm is formed, the side surface of the cubic cage is an annular water outlet screen 4 with two stainless steel punching plates with the size of 20 cm multiplied by 40 cm and 20 cm multiplied by 50 cm, one end of the annular water outlet screen is a shredder feed inlet with the size of 40 cm multiplied by 50 cm, and the other end of the annular water outlet screen is connected to the main body of the underwater shredder. The feeding hole of the shredder with the size of 40 cm multiplied by 50 cm is used as the section of the discharging hole of the air guide sleeve 2, the air guide sleeve 2 in a frustum shape is manufactured in an expanding mode, the section size of the feeding hole of the air guide sleeve 2 is 2 m multiplied by 2 m, and the distance between the feeding hole of the air guide sleeve 2 and the discharging hole is 1.8 m. The whole air guide sleeve 2 is made of stainless steel and reinforced and fixed by stainless steel bars. The air guide sleeve 2 and the underwater shredder are integrally installed on an underwater platform, and a feed inlet of the air guide sleeve 2 is connected with a tail bag opening of the marine organism intercepting bag net. Therefore, under the action of natural ocean current, floaters such as accumulated marine organisms and the like are intercepted by the intercepting bag net, and due to the fact that pressure difference is formed between the feeding hole and the discharging hole of the air guide sleeve 2, the floaters are automatically conveyed to the inlet of the underwater shredder to be further smoothly shredded, and the problem that the underwater shredder cannot effectively work is solved perfectly.
Example 2
In certain fishing trawl operation, a fish suction pump connected to the tail of the trawl is used for continuous fishing operation, the suction force of the fish suction pump is extremely limited, and most of the fishing objects have the capacity of active swimming escape, so that the fishing efficiency is low, and the escape coefficient is too high. According to the actual situation, the diameter of the inlet of the fish sucking pump is 20 cm, and the average carcass diameter of the caught object is 8 cm. An annular water outlet screen 4 with the length exceeding 1.5 cm of the inlet of the fish suction pump is manufactured around the inlet of the fish suction pump by adopting a stainless steel punching plate with the aperture of 1 cm, and is reinforced and fixed by steel bars. One end of the annular water outlet screen 4 is fixedly connected to the fish pump main body, the other end of the annular water outlet screen is connected to the connecting flange 3 with the caliber of 20 cm, and the distance between the connecting flange 3 and the inlet of the fish pump is 1.5 cm so as to keep water flow smooth. The connecting flange 3 is used as a discharge hole of the air guide sleeve 2, the air guide sleeve 2 which is a cone is enlarged, the diameter of a feed hole of the air guide sleeve 2 is 2.5 meters, the distance between the feed hole and the discharge hole of the air guide sleeve 2 is 2 meters, and the air guide sleeve is suspended by buoyancy materials and is connected to a net bag of a fishery trawl. The whole air guide sleeve is made of stainless steel materials and reinforced and fixed by steel bars. Therefore, in the fishing trawl operation process, due to the Venturi effect between the feed inlet and the discharge outlet of the preposed air guide sleeve of the fish suction pump, the flow velocity of the annular water outlet screen at the discharge outlet of the air guide sleeve is increased and is greatly higher than the escape velocity of a caught object, so that the catching operation efficiency is greatly improved, and the escape loss of the caught object is reduced.
Example 3
The deepwater aquaculture net cage for certain marine fishes adopts a fish suction pump to catch live fishes so as to avoid hindering the normal operation of production. However, the suction force of the fish suction pump is very limited, and the floating escape capacity of the net cage aquaculture fishery is very strong, so the fishing efficiency is not high, and the escape rate is relatively high. According to actual conditions, the diameter of an inlet of the fish suction pump is 15 cm, and the average carcass diameter of a caught object is 7 cm. A stainless steel hole punching plate with the aperture of 1.5 cm is adopted to manufacture a cone annular water outlet screen 4, the diameter of one end of the cone annular water outlet screen 4 is 15 cm, the cone annular water outlet screen is connected to an inlet of a fish suction pump through a connecting flange 3, the other end of the cone annular water outlet screen is connected to the connecting flange 3 with the diameter of 25 cm, the distance between the connecting flanges 3 at the two ends is 20 cm, and the cone annular water outlet screen 4 is reinforced and fixed by steel bars. A connecting flange 3 at the end of 25 cm of an annular water outlet screen 4 is used as a discharge hole of a guide cover 2, the guide cover 2 which is a cone is enlarged, the diameter of a feed inlet of the guide cover 2 is 2.5 meters, and the distance between the feed inlet and the discharge hole of the guide cover 2 is 2 meters. The whole of the air guide sleeve 2 is made of stainless steel materials and reinforced and fixed by steel bars. According to the actual situation of the sea field of the deepwater aquaculture net cage, the aquaculture net cage is opened on one side of the downstream of the sea field, the diameter of the opening is 2.5 meters, the opening is closely combined with the feed inlet of the guide cover 2, and the fish suction pump with the guide cover 2 is integrally arranged at the opening of the deepwater aquaculture net cage in a floating mode. Therefore, in the process of catching the live fish in the deep-water net cage, under the action of a natural flow field, due to the pressure difference between the feed inlet and the discharge outlet of the air guide sleeve 2 arranged in front of the fish suction pump, the local flow velocity of the annular water outlet screen 4 at the annular water outlet of the discharge outlet of the air guide sleeve 2 is increased and is far higher than the escape velocity of the net cage culture object, so that the working efficiency of catching the live fish in the deep-water net cage culture is well ensured, and the escape rate of the culture object is reduced.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides an submergence formula suspension solid matter enrichment kuppe device which characterized in that includes:
the flow guide cover (2) is arranged at the input end of the suspended solid substance treatment equipment in the flow field, and the cross section of the flow guide cover is gradually reduced from the feed inlet to the discharge outlet to form a trumpet shape; the device comprises an annular water outlet screen (4), wherein the annular water outlet screen (4) is arranged in an annular shape, and one end of the annular water outlet screen (4) is arranged at a feed inlet of the suspended solid matter treatment equipment in a surrounding manner;
the connecting flange (3) is used for connecting the annular water outlet screen (4) with a discharge hole of the air guide sleeve (2), and the other end of the annular water outlet screen (4) is detachably connected with the connecting flange (3);
the material of the air guide sleeve (2) is water-tight stainless steel or a corrosion-resistant polymer material, and the diameter of the section of a discharge hole of the air guide sleeve (2) is more than 2 times of the average diameter of the suspended solid matter; the inside of the air guide sleeve (2) is provided with a smooth surface.
2. The submerged suspended solid matter enrichment air guide sleeve device according to claim 1, characterized in that: the ratio of the mesh aperture of the annular water outlet screen (4) to the average diameter of the suspended solid matter is not more than 0.2: 1.
3. The submerged suspended solid matter enrichment air guide sleeve device according to claim 1, characterized in that: the diameter of the flow guide cover (2) is gradually reduced from the feed inlet to the discharge outlet, and the ratio of the cross section area of the feed inlet to the cross section area of the discharge outlet of the flow guide cover (2) is more than or equal to 10: 1.
4. the method for placing the submerged suspended solid matter enrichment dome as recited in any one of claims 1 to 3, wherein: the arrangement mode of the air guide sleeve (2) is arranged in a way of following the flow field direction, the feed inlet with larger sectional area faces the incoming flow direction, and the discharge outlet with smaller sectional area faces the outgoing direction of the flow field fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110548234.XA CN113274785B (en) | 2021-05-19 | 2021-05-19 | Immersion type suspension solid matter enrichment flow guide cover device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110548234.XA CN113274785B (en) | 2021-05-19 | 2021-05-19 | Immersion type suspension solid matter enrichment flow guide cover device |
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| CN113274785A CN113274785A (en) | 2021-08-20 |
| CN113274785B true CN113274785B (en) | 2022-05-20 |
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| CN202110548234.XA Active CN113274785B (en) | 2021-05-19 | 2021-05-19 | Immersion type suspension solid matter enrichment flow guide cover device |
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| CN114797249B (en) * | 2022-06-08 | 2023-02-07 | 大连理工大学 | Suspension material is collected with seesaw formula feed arrangement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE4213847C2 (en) * | 1991-04-25 | 1996-10-17 | Branko Dipl Ing Klasnic | Device for the mechanical cleaning of liquids in channels or in containers |
| CN203962224U (en) * | 2014-07-25 | 2014-11-26 | 宁波市海通汽车配件有限公司 | Novel automobile air-strainer |
| CN105409894B (en) * | 2015-12-15 | 2018-10-02 | 中国科学院深海科学与工程研究所 | A kind of anti-escape trap of abyssal benthos |
| US20180160657A1 (en) * | 2016-12-12 | 2018-06-14 | Peter B. Lindgren | Sea lice fish pump |
| CN207848032U (en) * | 2018-01-22 | 2018-09-11 | 山东心传矿山机电设备有限公司 | A kind of flow guiding head of kuppe |
| CN208863388U (en) * | 2018-09-14 | 2019-05-17 | 浙江省淡水水产研究所 | A kind of drift fish-egg, larva and juvenile investigate netting gear |
| CN209941641U (en) * | 2019-04-26 | 2020-01-14 | 贵州师范大学 | River surface garbage collection device |
| CN211171868U (en) * | 2019-11-29 | 2020-08-04 | 中国电建集团成都勘测设计研究院有限公司 | Fish passing facility for stream |
| CN110965536A (en) * | 2019-12-20 | 2020-04-07 | 大连理工大学 | Fixed water area gathering floater automatic processing suction clearing device |
| CN111226875A (en) * | 2020-04-03 | 2020-06-05 | 山东省海洋资源与环境研究院 | Box type fishing device |
| CN212772264U (en) * | 2020-05-22 | 2021-03-23 | 漳州市保毅路辉网络科技有限公司 | Water surface floating garbage collecting device |
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