CN111543382B - Pipeline oxygenation circulating device for fishery culture water body - Google Patents

Pipeline oxygenation circulating device for fishery culture water body Download PDF

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Publication number
CN111543382B
CN111543382B CN202010601442.7A CN202010601442A CN111543382B CN 111543382 B CN111543382 B CN 111543382B CN 202010601442 A CN202010601442 A CN 202010601442A CN 111543382 B CN111543382 B CN 111543382B
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pipe
water
electromagnetic valve
venturi
aeration
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CN111543382A (en
Inventor
宋城业
谭帅
肖卫华
王辉
谢思璇
李芊芊
陈婷
孟志雄
吴友杰
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Hunan Agricultural University
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Hunan Agricultural University
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K63/00Receptacles for live fish, e.g. aquaria; Terraria
    • A01K63/04Arrangements for treating water specially adapted to receptacles for live fish
    • A01K63/042Introducing gases into the water, e.g. aerators, air pumps

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Farming Of Fish And Shellfish (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

The invention discloses a pipeline oxygenation circulating device for a fishery aquaculture water body, which comprises a submersible pump positioned in a aquaculture pond and a central controller, wherein a dissolved oxygen sensor and an ultraviolet sterilization lamp are installed in the aquaculture pond, the dissolved oxygen sensor and the ultraviolet sterilization lamp are electrically connected with the central controller, the submersible pump is connected with a water conduit, the water conduit is connected with a first water conduit, a first electromagnetic valve is installed on the first water conduit, and the first water conduit is connected with a Venturi aerator pipe. The improved venturi aeration pipe and the impeller vortex pipe are adopted in the scheme, the aeration efficiency of the culture water body can be improved, meanwhile, an electronic signal transmitted by the dissolved oxygen sensor is transmitted to the central controller, the device is controlled to be a system, the reaction speed and the reliability of the device on water body treatment are improved, in addition, each component of the device is independent, the disassembly and the daily maintenance are convenient, and the device has higher flexibility.

Description

Pipeline oxygenation circulating device for fishery culture water body
Technical Field
The invention relates to the technical field of fishery cultivation, in particular to a pipeline oxygenation circulating device for a fishery cultivation water body.
Background
In recent years, in order to meet the demands of farmers for high yield and high profits, the fishery cultivation mode gradually tends to be closed type high-density cultivation. Because of the overlarge culture density, the content of dissolved oxygen in the water is often low, so that fish metabolites cannot be separated and degraded in time, a large number of plankton and anaerobic bacteria are bred, and the water pollution problems such as water eutrophication are caused. It is particularly important how to increase the dissolved oxygen content of a water body in a limited space.
In the prior art, although the oxygenation equipment is commonly adopted to achieve the effect of increasing the dissolved oxygen content of the water body, most of the equipment has the defects of strong power, long oxygenation time, high operation cost, high energy consumption and the like, and most of the equipment is placed in the water body of the culture pond and is not easy to maintain.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a pipeline oxygenation circulating device for a fishery aquaculture water body.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a pipeline oxygenation circulating device for fishery aquaculture water, is including being located the immersible pump of breeding the pond, still includes central controller, install dissolved oxygen sensor and sterilamp in the breed pond, and dissolved oxygen sensor and sterilamp all are connected with central controller electricity, immersible pump connection has the water conduit, the water conduit is connected with first raceway, and installs first solenoid valve on the first raceway, first raceway is connected with venturi aeration pipe, venturi aeration pipe passes through the latex tube and is connected with the air pump, install the aeration head in the venturi aeration pipe, intensive round hole has been seted up to the aeration head, venturi aeration pipe is connected with the second raceway, the second raceway is connected with impeller vortex, install two impellers in the impeller vortex pipe, impeller vortex pipe and third raceway are connected, the third raceway is connected with outlet conduit and circulation pipeline through the tee bend, the second solenoid valve is installed to the end of outlet conduit, install the third solenoid valve on the circulation pipeline, it is last to breed the third solenoid valve, the fourth solenoid valve is all installed to the fourth solenoid valve, the fourth solenoid valve is connected with the fourth solenoid valve, fourth solenoid valve is installed to the fourth solenoid valve in the side of the pond.
Further, the outside of immersible pump parcel has metal filter screen.
Further, the venturi aeration pipe is connected with the first water pipe through reducing joints with the sizes of 25mm and 50mm, the venturi aeration pipe is connected with the second water pipe through reducing joints with the sizes of 25mm and 50mm, the impeller vortex pipe is connected with the second water pipe through reducing joints with the sizes of 25mm and 50mm, and the impeller vortex pipe is connected with the third water pipe with the outer diameter of 25 mm.
Further, the aeration head is conical.
Further, the distance between the two impellers is 50mm.
Compared with the prior art, the invention has the beneficial effects that:
The improved venturi aeration pipe and the impeller vortex pipe are adopted in the scheme, the aeration efficiency of the culture water body can be improved, meanwhile, an electronic signal transmitted by the dissolved oxygen sensor is transmitted to the central controller, the device is controlled to be a system, the reaction speed and the reliability of the device on water body treatment are improved, in addition, each component of the device is independent, the disassembly and the daily maintenance are convenient, and the device has higher flexibility.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
FIG. 1 is a schematic diagram of the overall structure of a pipeline oxygenation circulation device for a fishery aquaculture water body according to the present invention;
FIG. 2 is a schematic view of the internal structure of the venturi aeration tube of FIG. 1;
fig. 3 is a schematic view showing the internal structure of the impeller scroll of fig. 1.
In the figure: 1a culture pond, 2 submersible pumps, 3 metal filter screens, 4 water diversion pipes, 5a first electromagnetic valve, 6a first water pipe, 7a Venturi aerator pipe, 701 a latex pipe, 702 an aerator, 8 an air pump, 9 a second water pipe, 10 an impeller vortex pipe, 1001 an impeller, 11a third water pipe, 12 a second electromagnetic valve, 13 a water outlet pipe, 14 a third electromagnetic valve, 15 a circulating pipe, 16a central controller, 17 a dissolved oxygen sensor, 18 an ultraviolet sterilization lamp, 19 a fourth electromagnetic valve and 20 a clear water pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-3, a pipeline oxygenation circulating device for a fishery aquaculture water body comprises a submersible pump 2 positioned in a aquaculture pond 1 and further comprises a central controller 16, wherein a dissolved oxygen sensor 17 and an ultraviolet germicidal lamp 18 are installed in the aquaculture pond 1, the dissolved oxygen sensor 17 and the ultraviolet germicidal lamp 18 are electrically connected with the central controller 16, the submersible pump 2 is connected with a water conduit 4, the water conduit 4 is connected with a first water conduit 6, a first electromagnetic valve 5 is installed on the first water conduit 6, the first water conduit 6 is connected with a venturi aerator pipe 7, the venturi aerator pipe 7 is connected with an air pump 8 through a latex pipe 701, an aeration head 702 is installed in the venturi aerator pipe 7, the aeration head 702 is provided with dense round holes, the venturi aerator pipe 7 is connected with a second water conduit 9, the second water conduit 9 is connected with an impeller vortex 10, two impellers 1001 are installed in the impeller vortex 10 and are connected with a third water conduit 11, the third water conduit 11 is connected with a water outlet pipe 13 and a circulating pipeline 15 through a third water conduit 13, the tail end of the water outlet pipe 13 is provided with a second electromagnetic valve 12, the third electromagnetic valve 14 is installed on the tail end of the water conduit 13 and the circulating pipeline is connected with the fourth electromagnetic valve 20, the third electromagnetic valve 20 is installed on the tail end of the third water conduit 12 and the third electromagnetic valve 20 is connected with the fourth electromagnetic valve 20, the fourth electromagnetic valve 20 is installed on the tail end of the third electromagnetic valve 1 and the third electromagnetic valve 20 is connected with the third electromagnetic valve 20, and the fourth electromagnetic valve 20 is installed on the tail end of the third electromagnetic valve 12 is connected with the third electromagnetic valve 20, and the fourth electromagnetic valve 20 is installed in the fourth electromagnetic valve 12, and the clean water pipeline is installed in the fourth electromagnetic valve is installed in the clean water pipeline is in the water tank is.
Further, the outer side of the submersible pump 2 is wrapped with a metal filter screen 3.
Further, the venturi aerator pipe 7 is connected with the first water pipe 6 through reducing joints with the sizes of 25mm and 50mm, the venturi aerator pipe 7 is connected with the second water pipe 9 through reducing joints with the sizes of 25mm and 50mm, the impeller vortex tube 10 is connected with the second water pipe 9 through reducing joints with the sizes of 25mm and 50mm, and the impeller vortex tube 10 is connected with the third water pipe 11 with the outer diameter of 25 mm.
Further, aeration head 702 is conical.
Further, the pitch of the two impellers 1001 is 50mm.
The water body circulation in the culture pond 1 provides power for the operation of the whole device through the submerged pump 2, and the submerged pump outside is provided with a 2mm metal filter screen 3, is about 2-3mm apart from the submerged pump 2, and is connected with the iron wire, so as to filter water body impurities, prevent the impurities from entering the device, and ensure the safe operation of the whole device.
The water diversion pipe 4 is connected with the submerged pump 2, extracts the water body of the culture pond 1, enters the improved Venturi aeration pipe 7 through the first water pipe 6, and a first electromagnetic valve 5 is arranged between the water diversion pipe 4 and the first water pipe 6.
The center of the improved Venturi aerator pipe 7 is connected with the air pump 8 through a latex pipe 701 with the inner diameter of 5mm, and two ends of the improved Venturi aerator pipe 7 are connected with reducing joints with the diameters of 25mm and 50mm to connect the first water pipe 6 and the second water pipe 9. The improved Venturi aeration pipe 7 is internally provided with an aeration head 702 which is conical, the diameter of the bottom surface is 50mm, the height is 30mm, circular holes with the size of 1mm are uniformly distributed, air and the aquaculture water are fully mixed through the reducing at two ends of a pipeline, the outflow of the small holes and the aeration effect of an air pump, and the dissolved oxygen content of the water is improved by increasing the contact area of gas and water flow.
The water inlet of the impeller vortex 10 is connected with the water delivery pipe 29 through a reducing joint of 25mm and 50mm, and the water outlet of the impeller vortex 10 is connected with the third water delivery pipe 11 with the outer diameter of 25 mm. Wherein the impeller scroll 10 is provided with two sets of impellers 1001 spaced 50mm apart. The impeller 1001 is driven to rotate under the action of water flow, so that the water body and the air are further uniformly mixed, and the aeration efficiency is improved.
The third water delivery pipe 11 is connected with the water outlet pipe 13 and the circulating pipe 15 through a constant diameter tee joint. Wherein, the tail end of the circulating pipeline 15 is positioned at the upper part of the culture pond, so that the circulating flow of the pipeline water flow is ensured. The outlet pipe 13 and the circulation pipe 15 are provided with a second solenoid valve 12 and a third solenoid valve 14, respectively.
The central controller 16 is connected with the first electromagnetic valve 5, the second electromagnetic valve 12, the third electromagnetic valve 14, the submersible pump 2, the air pump 8 and the dissolved oxygen sensor 17 through wires so as to control the opening and closing of all the components. The central controller 16 is mainly composed of a singlechip, a relay and a matched program. The dissolved oxygen content in the water body is monitored by the dissolved oxygen sensor 17, and data is fed back to the central controller 16 in real time, so that the first electromagnetic valve 5, the second electromagnetic valve 12 and the third electromagnetic valve 14 are controlled, and the water flow rate in the device is regulated.
The ultraviolet sterilizing lamp 18 is arranged at the side of the culture pond 1 and 20cm away from the bottom, and has the sterilizing effect on the water body.
The capacity of the culture pond is 5m 3, the submersible pump adopts 220v1.5KW submersible pump, the flow is 5m 3/h, and the lift is 35m.
The water delivery pipe 16, the second water delivery pipe 9, the third water delivery pipe 11, the water delivery pipe 13 and the circulating pipe 15 are all PVC pipes with the outer diameter of 25 mm.
The working principle of the scheme is as follows: the dissolved oxygen content of the water body of the culture pond 1 is collected through the dissolved oxygen sensor 17 and fed back to the central controller 16, and whether the device is started or not is identified. When the oxygen sensor 17 detects that the dissolved oxygen content of the water body is lower than the artificial design value, the submersible pump 2, the first electromagnetic valve 5 and the third electromagnetic valve 14 are started, the water body in the culture pond 1 passes through the water conduit 4, and enters the device to be aerated through the improved Venturi aerator pipe 7 connected with the air pump 8 and the impeller vortex tube 10.
When the device operates, the submersible pump 2, the first electromagnetic valve 5 and the third electromagnetic valve 14 are opened through the central controller 16, the second electromagnetic valve 12 is closed, and if the device water body continuously and circularly operates for 1h, the air pump 8 is closed to reduce the operation cost of the device when the dissolved oxygen content in the water body of the culture pond 1 reaches the required dissolved oxygen content of the culture water body; if the dissolved oxygen content in the aquaculture water still does not reach the required dissolved oxygen content of the aquaculture water after the device water continuously and circularly runs for 1h, the second electromagnetic valve 12 is opened, the air pump 8 and the third electromagnetic valve 14 are closed, the aquaculture pond 1 water is discharged through the water outlet pipeline 13, the fourth electromagnetic valve 19 is opened, and clean water is injected into the aquaculture pond 1 through the clean water pipe 20.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (3)

1. The utility model provides a pipeline oxygenation circulating device for fishery aquaculture water, includes immersible pump (2) that are arranged in breed pond (1), characterized in that still includes central controller (16), install dissolved oxygen sensor (17) and sterilamp (18) in breed pond (1), and dissolved oxygen sensor (17) and sterilamp (18) all are connected with central controller (16) electricity, immersible pump (2) are connected with water conduit (4), water conduit (4) are connected with first raceway (6), and install first solenoid valve (5) on first raceway (6), first raceway (6) are connected with venturi aeration pipe (7), venturi aeration pipe (7) are connected with air pump (8) through latex tube (701), install aeration head (702) in venturi aeration pipe (7), intensive round hole has been seted up to aeration head (702), aeration pipe (7) are connected with second raceway (9), second raceway (9) are connected with water conduit (10), install in venturi impeller (10) and swirl impeller (10), the third water conveying pipe (11) is connected with a water outlet pipe (13) and a circulating pipe (15) through a tee joint, a second electromagnetic valve (12) is arranged at the tail end of the water outlet pipe (13), a third electromagnetic valve (14) is arranged on the circulating pipe (15), the tail end of the circulating pipe (15) extends into the culture pond (1), a clear water pipe (20) is arranged on the upper side of the culture pond (1), a fourth electromagnetic valve (19) is arranged on the clear water pipe (20), and the air pump (8), the first electromagnetic valve (5), the second electromagnetic valve (12), the third electromagnetic valve (14) and the fourth electromagnetic valve (19) are all electrically connected with the central controller (16);
The venturi aeration pipe (7) is connected with the first water conveying pipe (6) through reducing joints with the sizes of 25mm and 50mm, the venturi aeration pipe (7) is connected with the second water conveying pipe (9) through reducing joints with the sizes of 25mm and 50mm, the impeller vortex tube (10) is connected with the second water conveying pipe (9) through reducing joints with the sizes of 25mm and 50mm, and the impeller vortex tube (10) is connected with the third water conveying pipe (11) with the outer diameter of 25 mm;
the aeration head (702) is conical.
2. The pipeline oxygenation circulating device for the fishery aquaculture water body according to claim 1, wherein the outer side of the submersible pump (2) is wrapped with a metal filter screen (3).
3. A pipe oxygenation circulation device for a body of aquaculture water according to claim 1, wherein the distance between two of said impellers (1001) is 50mm.
CN202010601442.7A 2020-06-28 2020-06-28 Pipeline oxygenation circulating device for fishery culture water body Active CN111543382B (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100013496A (en) * 2008-07-31 2010-02-10 윤영화 Water purifying device
KR20120002681A (en) * 2010-07-01 2012-01-09 주식회사환경과생명 Ventury tube type nano bubble proceded water generator
CN203313907U (en) * 2013-07-14 2013-12-04 青岛七好营养科技有限公司 Oxygen and water mixing device for improving dissolved oxygen concentration in water in recirculating aquaculture
CN103585905A (en) * 2013-11-22 2014-02-19 湖南农业大学 Circular micro-bubble generating device
WO2014145661A1 (en) * 2013-03-15 2014-09-18 Pentair Water Pool And Spa, Inc. Dissolved oxygen control system for aquaculture
CN104430138A (en) * 2014-12-26 2015-03-25 天全润兆鲟业有限公司 Water body oxygen aeration technology and device thereof
CN107337285A (en) * 2017-07-10 2017-11-10 湖南农业大学 Equipment for increasing oxygen content of water
CN109090015A (en) * 2018-10-18 2018-12-28 广州优昙钵生物科技有限公司 One seed shrimp breeding tank surface layer water treatment system
KR20200024424A (en) * 2018-08-28 2020-03-09 주식회사 비오엘연구소 Dissolved oxygen aquaponics fog culture system
CN212279493U (en) * 2020-06-28 2021-01-05 湖南农业大学 A pipeline oxygenation circulating device for fishery aquaculture water

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI586266B (en) * 2016-06-17 2017-06-11 元智大學 Aquaculture system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100013496A (en) * 2008-07-31 2010-02-10 윤영화 Water purifying device
KR20120002681A (en) * 2010-07-01 2012-01-09 주식회사환경과생명 Ventury tube type nano bubble proceded water generator
WO2014145661A1 (en) * 2013-03-15 2014-09-18 Pentair Water Pool And Spa, Inc. Dissolved oxygen control system for aquaculture
CN203313907U (en) * 2013-07-14 2013-12-04 青岛七好营养科技有限公司 Oxygen and water mixing device for improving dissolved oxygen concentration in water in recirculating aquaculture
CN103585905A (en) * 2013-11-22 2014-02-19 湖南农业大学 Circular micro-bubble generating device
CN104430138A (en) * 2014-12-26 2015-03-25 天全润兆鲟业有限公司 Water body oxygen aeration technology and device thereof
CN107337285A (en) * 2017-07-10 2017-11-10 湖南农业大学 Equipment for increasing oxygen content of water
KR20200024424A (en) * 2018-08-28 2020-03-09 주식회사 비오엘연구소 Dissolved oxygen aquaponics fog culture system
CN109090015A (en) * 2018-10-18 2018-12-28 广州优昙钵生物科技有限公司 One seed shrimp breeding tank surface layer water treatment system
CN212279493U (en) * 2020-06-28 2021-01-05 湖南农业大学 A pipeline oxygenation circulating device for fishery aquaculture water

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