CN110980974B - 360-Degree intelligent wave raft type aeration and oxygenation device and aeration and oxygenation method thereof - Google Patents
360-Degree intelligent wave raft type aeration and oxygenation device and aeration and oxygenation method thereof Download PDFInfo
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- CN110980974B CN110980974B CN201911230521.5A CN201911230521A CN110980974B CN 110980974 B CN110980974 B CN 110980974B CN 201911230521 A CN201911230521 A CN 201911230521A CN 110980974 B CN110980974 B CN 110980974B
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- 238000005273 aeration Methods 0.000 title claims abstract description 56
- 238000006213 oxygenation reaction Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 230000009471 action Effects 0.000 claims abstract description 5
- 238000003860 storage Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 abstract description 9
- 239000001301 oxygen Substances 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 description 7
- 238000005276 aerator Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 206010021143 Hypoxia Diseases 0.000 description 5
- 238000009395 breeding Methods 0.000 description 5
- 230000001488 breeding effect Effects 0.000 description 5
- 230000007954 hypoxia Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 241000630524 Taractes rubescens Species 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 231100000518 lethal Toxicity 0.000 description 1
- 230000001665 lethal effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 230000035485 pulse pressure Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention discloses a 360-degree intelligent wave raft type aeration oxygenation device and an aeration oxygenation method thereof, wherein the device comprises a horizontal connecting plate, two opposite ends of the horizontal connecting plate are respectively hinged with a pitching raft plate, two air cylinders are fixedly arranged at the bottom of the horizontal connecting plate, a one-way air inlet valve and a one-way air outlet valve are arranged in an air inlet pipe and an air outlet pipe of each air cylinder, and piston rods of the two air cylinders are respectively fixedly arranged at the bottoms of the pitching rafts adjacent to the two air cylinders; the 360-degree intelligent wave raft type aeration and oxygenation device and the aeration and oxygenation method thereof disclosed by the invention can automatically and intermittently aerate and oxygenate a water body only by wave action, thereby increasing the dissolved oxygen content in the water body, and the device does not need to consume electric energy or fossil energy, and is environment-friendly and pollution-free.
Description
Technical Field
The invention belongs to the field of water oxygenation equipment, and particularly relates to a 360-degree intelligent wave raft type aeration oxygenation device and an aeration oxygenation method thereof.
Background
Molecular oxygen dissolved in water is called dissolved oxygen, and is one of important indexes for representing self-cleaning ability of water environment and water body. The too low concentration of dissolved oxygen can cause death of marine organisms such as fish, pollute water quality and cause serious ecological environment problems. Since the mid twentieth century, water hypoxia has become an environmental ecological problem facing the global sea area. The average dissolved oxygen concentration in the global sea area has been reduced by about 2% over the last 50 years. The world's sea area has developed more than 400 "ecological dead zones" due to hypoxia, such as the bolo sea, black sea, gulf of mexico and part of the sea area of the eastern sea of china, and the like, and the coverage area has exceeded 2.45×10 5km2. Even more serious, the number of anoxic sea areas in coastal areas is also growing at an exponential rate of 5.54% per year, and future global sea area anoxic conditions are expected to be further exacerbated.
In the traditional breeding industry, the problem of seawater hypoxia is not obvious due to low breeding density. With the advent of modern intensive breeding, the requirements on the breeding density and the product quality are continuously increased, and seawater hypoxia has become one of the important reasons for limiting the expansion of the breeding scale and improving the economic benefit. Taking cage golden pomfret cultivation as an example: the dissolved oxygen is lower than 3 mg/L to be a lethal point, so that golden pomfret is in a good growth state, the dissolved oxygen is kept above 5 mg/L, and the golden pomfret can grow rapidly above 9 mg/L. The "dead zone" of the bald sea is a region where 2.64×10 5 t of carbon is lost each year because of the long-term persistent hypoxia, accounting for 30% of the total primary productivity of the entire bald sea, resulting in a total reduction of fishery production of up to 1.06×10 5 t. The Chinese ocean pasture is in the construction acceleration period, 86 national ocean pasture demonstration areas covering four large sea areas of Bohai sea, yellow sea, east sea and south sea are constructed, 178 national ocean pasture demonstration areas are planned to be constructed in 2025, and the national ocean pasture scientific development is led.
At present, the oxygen increasing purpose of the water body is mainly realized by adopting physical, chemical, biological and other methods at home and abroad. The common aerator mainly comprises an air compressor, an impeller aerator, a waterwheel aerator, a water spraying aerator and the like, but the devices have the problems of high energy consumption, high noise, low economic benefit and the like.
Disclosure of Invention
The invention aims to solve the technical problem of providing a 360-degree intelligent wave raft type aeration and oxygenation device and an aeration and oxygenation method thereof.
The invention adopts the following technical scheme:
An intelligent wave raft type aeration and oxygenation device with 360 degrees, which is improved in that: the device comprises a horizontal connecting plate, wherein two opposite ends of the horizontal connecting plate are respectively hinged with a pitching raft plate, two air cylinders are fixedly arranged at the bottom of the horizontal connecting plate, a one-way air inlet valve and a one-way air outlet valve are arranged in an air inlet pipe and an air outlet pipe of each air cylinder, and piston rods of the two air cylinders are respectively fixedly arranged at the bottoms of the pitching rafts adjacent to the two air cylinders; a square frame is arranged at the top of a horizontal connecting plate and fixedly attached to a water surface facility through a bracket, an FD motor is respectively arranged at the tops of two transverse frames of the square frame, power output shafts of the two FD motors are vertically downward, a first ball screw which is vertically downward is fixedly arranged on the output shaft of the FD motor at the top, a screw shaft of the first ball screw penetrates through the transverse frame at the top of the square frame, a bearing is fixedly arranged on a nut of the first ball screw, a plate collecting bracket with a vertical section of a Pi shape is fixedly arranged on the bearing, the plate collecting bracket can rotate in the square frame around the bearing, guide wheels are respectively arranged at the bottoms of two sides of the plate collecting bracket, and the two guide wheels are respectively pressed at two ends of the horizontal connecting plate, which are hinged with a pitching raft plate; the vertical downward second ball screw is fixedly arranged on the output shaft of the bottom FD motor, the screw shaft of the second ball screw penetrates through the bottom transverse frame of the square frame and the horizontal connecting plate, the bottom of the second ball screw is fixedly provided with a bearing, the bearing is provided with a fixed block, the top of the fixed block is fixedly connected with the bottom of the horizontal connecting plate through a connecting rod, in addition, two opposite side surfaces of the fixed block are respectively provided with a direction-adjusting tail wing, the nut of the second ball screw is fixedly provided with a bearing, and the horizontal connecting plate is fixedly connected with the bearing.
Further, the pitching raft is a light pitching raft.
Further, the vertical section of the inflator is arc-shaped.
Further, the square frame is attached to the cultivation net cage, and air outlets of the two air cylinder air outlet pipes are arranged in the cultivation net cage.
Further, a float switch is mounted on the mullion of the square frame.
Further, the FD motor and the control circuit are powered by a storage battery, and the storage battery is charged by a solar panel.
Further, the number of the connecting rods is two, and the connecting rods are respectively positioned at two sides of the second ball screw shaft.
Further, the top FD motor and the bottom FD motor are located opposite to each other in the vertical direction, and the screw shaft of the first ball screw and the screw shaft of the second ball screw are located opposite to each other in the vertical direction.
Further, the length of the rod of the steering tail wing is equal to half of the length of the horizontal connecting plate, and a tail rudder is arranged at the tail part of the steering tail wing, and the area of the tail rudder is 75% of that of the pitching raft.
An aeration and oxygenation method, which uses the device, is improved in that: after the device is installed in place and started, the bottom FD motor is started to drive the screw shaft of the second ball screw to rotate, the screw nut slides along the screw shaft to adjust the height of the horizontal connecting plate, so that the pitching raft at the two ends of the horizontal connecting plate partially stretches into water, and the bottom FD motor is closed after the pitching raft partially exposes out of the water surface, the pitching raft drives the piston rod to reciprocate under the action of waves, air enters the air cylinder through the one-way air inlet valve through the air inlet pipe when the piston rod is pulled out, air is discharged through the one-way air outlet valve through the air outlet pipe when the piston rod is pressed in, and intermittent air suction from the atmosphere and intermittent air aeration to the water body are completed; when the direction-adjusting tail wing is not collinear with the incident direction of the waves, the direction-adjusting tail wing can drive the fixed block to rotate around the screw shaft of the second ball screw under the pushing of the waves, the fixed block drives the horizontal connecting plate to rotate around the screw shaft of the second ball screw, the horizontal connecting plate drives the plate collecting support to rotate around the screw shaft of the first ball screw, and the rotation of the fixed block, the horizontal connecting plate and the plate collecting support are synchronous until the direction-adjusting tail wing is collinear with the incident wave direction of the water flow, and the rotation is stopped, so that the pitching raft plates at the two ends of the horizontal connecting plate face the incident waves; when the wave height exceeds a set value, the top FD motor is started to drive the screw shaft of the first ball screw to rotate, the screw nuts slide down along the screw shaft to enable the collecting plate support to move downwards, the guide wheels at two sides of the collecting plate support slide down along the pitching raft plates opposite to the screw shaft, the pitching raft plates at two ends of the horizontal connecting plate are closed after being retracted, the bottom FD motor is started to drive the screw shaft of the second ball screw to rotate, the screw nuts slide down along the screw shaft to enable the horizontal connecting plate to sink into the water for a certain depth, the bottom FD motor is closed for wave avoidance self-protection, when the wave height falls below the set value, the screw nuts slide down along the screw shaft to adjust the height of the horizontal connecting plate, the pitching raft plates at two ends of the horizontal connecting plate extend into the water, the pitching raft plates at two ends are partially exposed out of the water, the bottom FD motor is started to drive the screw shaft of the first ball screw shafts to rotate, the screw nuts slide up along the screw shaft to enable the collecting plate support to move up, the guide wheels at two sides of the collecting plate support slide down along the opposite to the pitching raft plates, and the two ends of the horizontal connecting plate support are normally closed after the pitching raft plates are opened.
The beneficial effects of the invention are as follows:
The 360-degree intelligent wave raft type aeration oxygenation device and the aeration oxygenation method thereof can automatically and intermittently aerate and oxygenate a water body only by wave action, so that the dissolved oxygen content in the water body is increased, electric energy or fossil energy is not required to be consumed, the environment is protected, no pollution is caused, and the problem that the current oxygen supply device consumes large energy can be solved. The direction-adjusting tail wing drives the horizontal connecting plate to automatically turn 360 degrees along with the change of the incident wave direction, so that the pitching raft plates at the two ends of the horizontal connecting plate can always face the incident wave, and the aeration efficiency is maximized. Under severe wave conditions, the plate collecting support is firstly moved downwards so as to collect the pitching raft, then the horizontal connecting plate is submerged into the water for a certain depth to avoid waves and self-protection, the safety of the device is ensured, after the working wave conditions are recovered, the horizontal connecting plate is lifted out of the water surface and then the pitching raft is released, and the device continues to normally operate.
The 360-degree intelligent wave raft type aeration oxygenation device and the aeration oxygenation method thereof disclosed by the invention can be applied to the aspects of aquiculture in anoxic sea areas, marine environment protection and improvement, coast and near-shore structure safety protection and the like, can be widely applied to deep sea cage culture and artificial island reef projects besides general intensive culture, have the advantages of intelligence, energy conservation, environmental protection, economy, high efficiency and the like compared with the traditional oxygenation device, and are favorable for realizing the coordinated development of marine environment protection and fishery economy, and have wide application prospects.
Drawings
FIG. 1 is a schematic view showing the structure of a device according to embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the aeration and oxygenation system in the apparatus disclosed in embodiment 1 of the invention;
FIG. 3 is a schematic diagram of the intelligent lifting system in the apparatus according to embodiment 1 of the present invention;
FIG. 4 is a schematic view of a 360 steering system in the apparatus of example 1 of the present invention;
FIG. 5 is a schematic plan view of an apparatus according to embodiment 1 of the present invention for performing an indoor physical model test;
FIG. 6a is a graph of average aeration flow versus wave period for the device disclosed in example 1 of the present invention at a raft aspect ratio of 0.75 and an aeration depth of 0.1 m;
FIG. 6b is a graph of average aeration flow versus wave period for the device disclosed in example 1 of the present invention at a raft aspect ratio of 1.25 and an aeration depth of 0.4 m;
FIG. 6c is a graph of average aeration flow versus wave period for the device disclosed in example 1 of the present invention at a wave height of 0.12m and an aeration depth of 0.1 m;
FIG. 7 is a numerical modeling diagram of a pitch raft of the disclosed apparatus of example 1 of the present invention;
FIG. 8 is a graph showing simulated values of displacement versus measured values of a pitch raft of the apparatus of example 1 of the present invention;
Fig. 9 is a graph showing the relationship between the pressure of the pitch raft and the cyclic variation of the wave according to the embodiment 1 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Embodiment 1, as shown in fig. 1, the embodiment discloses a 360-degree intelligent wave raft type aeration and oxygenation device, which comprises an aeration and oxygenation system 2 consisting of a horizontal connecting plate, a pitching raft plate, a piston rod and an air cylinder; the intelligent lifting system 1 consists of two FD motors, a first ball screw, a plate collecting bracket, a second ball screw and a control circuit; and the 360-degree steering system 3 consists of a fixed block, a connecting rod and a steering tail wing.
Specifically, as shown in fig. 2, the device comprises a horizontal connecting plate 21, two opposite ends of the horizontal connecting plate are respectively hinged with a pitching raft plate 22, two air cylinders 23 are fixedly arranged at the bottom of the horizontal connecting plate, a one-way air inlet valve and a one-way air outlet valve are arranged in an air inlet pipe 24 and an air outlet pipe 25 of each air cylinder, and piston rods 231 of the two air cylinders are respectively fixedly arranged at the bottoms of the pitching raft plates 22 adjacent to the two air cylinders; a square frame 10 is arranged at the top of a horizontal connecting plate and fixedly attached to a water surface facility through a bracket, an FD motor is respectively arranged at the tops of two transverse frames of the square frame, power output shafts of the two FD motors are vertically downward, as shown in figure 3, a first ball screw 12 which is vertically downward is fixedly arranged on the output shaft of the FD motor 11 at the top, the screw shaft of the first ball screw passes through the top transverse frame of the square frame, the bottom of the first ball screw is close to the FD motor on the transverse frame at the bottom of the square frame, a bearing is fixedly arranged on a nut 13 of the first ball screw, a plate collecting bracket 14 with a n-shaped vertical section is fixedly arranged on the bearing, the plate collecting bracket can rotate in the square frame around the bearing, guide wheels 15 are respectively arranged at the bottoms of two sides of the plate collecting bracket, and the two guide wheels are respectively pressed at two ends of the horizontal connecting plate, which are hinged with a pitching raft plate; the output shaft of the bottom FD motor 16 is fixedly provided with a second ball screw 17 which is vertically downward, the screw shaft of the second ball screw passes through the bottom transverse frame of the square frame and the horizontal connecting plate, as shown in fig. 4, the bottom of the second ball screw 17 is fixedly provided with a bearing 31, the bearing is provided with a fixed block 32, the top of the fixed block and the bottom of the horizontal connecting plate are fixedly connected through a connecting rod 33, in addition, two opposite side surfaces of the fixed block are respectively provided with a steering tail wing 34, the screw 18 of the second ball screw is fixedly provided with a bearing, and the horizontal connecting plate is fixedly connected with the bearing.
In this embodiment, the pitch raft is a lightweight pitch raft. The vertical section of the inflator is arc-shaped. The square frame is attached to the cultivation net cage, and air outlets of the two air cylinder air outlet pipes are arranged in the cultivation net cage. Or a plurality of the devices can be simultaneously attached on the same culture net cage. And a float switch is arranged on a vertical frame of the square frame, if the wave beats the float switch, the wave height is judged to exceed a set value, and the device performs wave avoiding self-protection. The FD motor and the control circuit are powered by a storage battery, and the storage battery is charged by a solar panel. The number of the connecting rods is two, and the connecting rods are respectively positioned at two sides of the second ball screw shaft. The top FD motor and the bottom FD motor are positioned opposite to each other in the vertical direction, and the screw shaft of the first ball screw and the screw shaft of the second ball screw are positioned opposite to each other in the vertical direction. The length of the rod of the steering tail wing is equal to half of the length of the horizontal connecting plate, and a tail rudder is arranged at the tail part of the steering tail wing, and the area of the tail rudder is 75% of that of the pitching raft.
The embodiment also discloses an aeration oxygenation method, which comprises the steps of using the device, after the device is installed in place and started, starting a bottom FD motor to drive a screw shaft of a second ball screw to rotate, sliding along the screw shaft through a screw nut to adjust the height of a horizontal connecting plate, enabling a pitching raft plate at two ends of the horizontal connecting plate to extend into water, closing the bottom FD motor after the pitching raft plate is partially exposed out of the water surface, driving a piston rod to reciprocate under the action of waves and buoyancy force exerted on the pitching raft plate, enabling air to enter an air cylinder through a one-way air inlet valve when the piston rod is pulled out, enabling air to be discharged through an air outlet pipe when the piston rod is pressed in, and thus finishing intermittent air suction from the atmosphere and intermittent aeration oxygenation to the water body; when the direction-adjusting tail wing is not collinear with the incident direction of the waves, the direction-adjusting tail wing can drive the fixed block to rotate around the screw shaft of the second ball screw under the pushing of the waves, the fixed block drives the horizontal connecting plate to rotate around the screw shaft of the second ball screw, the horizontal connecting plate drives the plate collecting support to rotate around the screw shaft of the first ball screw, and the rotation of the fixed block, the horizontal connecting plate and the plate collecting support are synchronous until the direction-adjusting tail wing is collinear with the incident wave direction of the water flow, and the rotation is stopped, so that the pitching raft plates at the two ends of the horizontal connecting plate face the incident waves; when the wave height exceeds a set value, the top FD motor is started to drive the screw shaft of the first ball screw to rotate, the screw shafts slide downwards to enable the collecting plate support to move downwards through the screw nuts, the guide wheels on two sides of the collecting plate support slide downwards along the opposite pitching raft plates, the pitching raft plates at two ends of the horizontal connecting plate are closed after being collected (the horizontal connecting plate is conveniently sunk into a stable water layer in the next step, the pitching raft plates are prevented from being damaged due to overlarge waves), the bottom FD motor is started to drive the screw shaft of the second ball screw to rotate, the screw nuts slide downwards along the screw shafts to enable the horizontal connecting plate to sink into the water for a certain depth, the wave avoiding self-protection is carried out, when the wave height falls below the set value, the screw nuts slide along the screw shafts to adjust the height of the horizontal connecting plate, the pitching raft plates at two ends extend into the water, the bottom FD motor is closed after the horizontal connecting plate is partially exposed out of the water, the bottom FD motor is started to drive the screw shafts of the first ball screw shafts to rotate, the screw shafts on the screw nuts slide downwards along the screw shafts to enable the horizontal connecting plate support to move downwards along the screw shafts, and the two sides of the collecting plate support slide along the screw shafts to normally, and the guide wheels at two ends of the corresponding to be closed after the collecting plate support slide along the screw shafts.
The device was subjected to an indoor physical model test according to the arrangement of fig. 5:
Four devices with different raft aspect ratios are manufactured, and physical model test researches are carried out by combining typical wave parameters, and specific working conditions are shown in the following table. Wherein the aeration depth h is the vertical distance from the aeration port to the still water surface.
Test parameter table (Water depth d=0.6m)
| Period T(s) | Wave height H (m) | Aeration depth h (m) | Raft length c (m) | Raft width d (m) | Raft plate length-width ratio a |
| 1.2 | 0.08 | 0.1 | 0.375 | 0.5 | 0.75 |
| 1.5 | 0.10 | 0.2 | 0.500 | 0.5 | 1.00 |
| 1.8 | 0.12 | 0.3 | 0.625 | 0.5 | 1.25 |
| 2.1 | 0.14 | 0.4 | 0.750 | 0.5 | 1.50 |
| 2.4 | 0.16 | 0.5 |
In experimental observation, wave height is observed in real time by utilizing a BG-2 wave height instrument (precision is 1 mm), wave pressure borne by a pitching raft plate is observed in real time by utilizing a pulse pressure sensor (precision is 0.1 Pa), angle change of the pitching raft plate is observed in real time by utilizing an HVS-120T inclination angle sensor (precision is 0.001 DEG), and the change process of air suction and air entrainment flow is observed in real time by utilizing an MF5700 gas mass flowmeter (precision is 0.001m 3).
As can be seen from analysis of test data, the devices with the aspect ratios of 0.75, 1, 1.25 and 1.5 respectively reach the maximum aeration flow rate under the conditions of aeration depth of 0.1m, wave height of 0.16m and period of 1.2s, and the aeration flow rates are 16.00L/min, 10.67L/min, 11.33L/min and 10.00L/min respectively.
The average aeration flow versus wave period is shown in figures 6a, 6b, 6 c. As the wave period increases, the average aeration flow rate substantially tends to decrease. It is noted that in the vicinity of t=2.1 s in fig. 6a, the secondary peak occurs in the average aeration flow, probably because the self-oscillation period of the device is similar to the wave period. It can also be seen from fig. 6a, 6b, and 6c that the smaller the aeration depth, the larger the incident wave height and the larger the aeration flow rate. Under the condition of a certain aeration depth and a certain incident wave height, the aeration flow of the device with a smaller raft length-width ratio is larger.
According to related data, the power consumption of the common YL-1.5 type impeller aerator is 1.5kW, and the average aeration capacity is about 2.3kg/h; the device does not consume electricity in the aeration and oxygenation process, and the average oxygenation capacity of the device is about 0.4kg/H when a=0.75, h=0.1 m, h=0.16 m and t=1.2 s. Assuming that the total oxygenation amount is equal (the impeller aerator works for 4 hours and the device works for 23 hours), the device can save electricity by about 6 kW.h each day, and the device can save 4.8 yuan of electricity charge each day by calculating the industrial electricity charge per kilowatt of the Qingdao in Shandong province, and assuming that the device works for 11 months a year, the device can be expected to save electricity by 1980 kW.h and save 1584 yuan of electricity charge.
And carrying out hydrodynamic analysis by using AQWA-LINE module of ANSYS software to finally obtain the data such as the motion displacement of the pitching raft, the transverse force and vertical force values of the wave acting on the device, the motion moment at the hinge joint and the like. Figure 7 is a numerical modeling of a pitch raft of the device, four devices were validated and pitch raft pressures were calculated for two wave conditions, with the calculated parameters being shown in the following table.
Calculation parameter table (water depth d=0.6m, h=0.16m, h=0.1 m)
| Period T(s) | Raft board c (m) | Raft width d (m) | Raft plate length-width ratio a |
| 1.2 | 0.375 | 0.5 | 0.75 |
| 2.4 | 0.500 | 0.5 | 1.00 |
| 0.625 | 0.5 | 1.25 | |
| 0.750 | 0.5 | 1.50 |
Fig. 8 shows that at a=1.0, h=0.1, t=1.2 s, h=0.16 m, the numerical simulation and test measurement curves substantially agree, verifying that the displacement simulation and measurement are substantially agree, representing that the parameters set for the numerical simulation are correct. The relationship of pressure magnitude with the periodic variation of the wave is shown in fig. 9 when h=0.1, t=1.2 s, and h=0.16 m. The pitch raft length-width ratio is 0.75, the average pressure of the wave-facing surface of the front pitch raft is the largest at each peak, and the pitch raft length-width ratios are 1, 1.25 and 1.5 respectively.
According to numerical simulation calculation analysis, the smaller the length-width ratio of the raft is, the closer to the vertical state when the pitching raft is placed on the still water surface is, and the larger the fluctuation pressure acting on the pitching raft is, which is consistent with the physical test result. The device with smaller length-width ratio has larger average aeration flow and larger wave force, which puts higher demands on the structure and material performance of the device.
Claims (8)
1. The application method of the 360-degree intelligent wave raft type aeration oxygenation device is characterized by comprising the following steps of: after the device is installed in place and started, the bottom FD motor is started to drive the screw shaft of the second ball screw to rotate, the screw nut slides along the screw shaft to adjust the height of the horizontal connecting plate, so that the pitching raft at the two ends of the horizontal connecting plate partially stretches into water, and the bottom FD motor is closed after the pitching raft partially exposes out of the water surface, the pitching raft drives the piston rod to reciprocate under the action of waves, air enters the air cylinder through the one-way air inlet valve through the air inlet pipe when the piston rod is pulled out, air is discharged through the one-way air outlet valve through the air outlet pipe when the piston rod is pressed in, and intermittent air suction from the atmosphere and intermittent air aeration to the water body are completed; when the direction-adjusting tail wing is not collinear with the incident direction of the waves, the direction-adjusting tail wing can drive the fixed block to rotate around the screw shaft of the second ball screw under the pushing of the waves, the fixed block drives the horizontal connecting plate to rotate around the screw shaft of the second ball screw, the horizontal connecting plate drives the plate collecting support to rotate around the screw shaft of the first ball screw, and the rotation of the fixed block, the horizontal connecting plate and the plate collecting support are synchronous until the direction-adjusting tail wing is collinear with the incident wave direction of the water flow, and the rotation is stopped, so that the pitching raft plates at the two ends of the horizontal connecting plate face the incident waves; when the wave height exceeds a set value, firstly starting a top FD motor to drive a screw shaft of a first ball screw to rotate, sliding down along the screw shaft by a screw nut to enable a collecting plate support to move downwards, enabling guide wheels at two sides of the collecting plate support to extend into water along opposite pitching raft plates, closing the top FD motor after the pitching raft plates at two ends of a horizontal connecting plate are retracted, starting the bottom FD motor to drive the screw shaft of a second ball screw to rotate, enabling the horizontal connecting plate to sink into water for a certain depth by sliding down along the screw shaft to enable the horizontal connecting plate to close the bottom FD motor, carrying out wave avoidance self-protection, when the wave height falls below the set value, firstly starting the bottom FD motor to drive the screw shaft of the second ball screw to rotate, enabling the screw nut to slide along the screw shaft to adjust the height of the horizontal connecting plate, enabling the pitching raft plates at two ends of the horizontal connecting plate to extend into water, enabling the parts of the pitching raft plates to be exposed out of the water, then starting the top FD motor to drive the screw shaft of the first ball screw shaft to rotate, sliding up along the screw shaft to enable the collecting plate support to move up along the screw shaft, enabling the guide wheels at two sides of the collecting plate support to slide down along the opposite pitching raft plates, and normally closing the top of the horizontal connecting plate after the pitching raft plates are opened;
The device comprises a horizontal connecting plate, wherein two opposite ends of the horizontal connecting plate are respectively hinged with a pitching raft plate, two air cylinders are fixedly arranged at the bottom of the horizontal connecting plate, a one-way air inlet valve and a one-way air outlet valve are arranged in an air inlet pipe and an air outlet pipe of each air cylinder, and piston rods of the two air cylinders are respectively fixedly arranged at the bottoms of the pitching rafts adjacent to the two air cylinders; a square frame is arranged at the top of a horizontal connecting plate and fixedly attached to a water surface facility through a bracket, an FD motor is respectively arranged at the tops of two transverse frames of the square frame, power output shafts of the two FD motors are vertically downward, a first ball screw which is vertically downward is fixedly arranged on the output shaft of the FD motor at the top, a screw shaft of the first ball screw penetrates through the transverse frame at the top of the square frame, a bearing is fixedly arranged on a nut of the first ball screw, a plate collecting bracket with a vertical section of a Pi shape is fixedly arranged on the bearing, the plate collecting bracket can rotate in the square frame around the bearing, guide wheels are respectively arranged at the bottoms of two sides of the plate collecting bracket, and the two guide wheels are respectively pressed at two ends of the horizontal connecting plate, which are hinged with a pitching raft plate; the output shaft of the bottom FD motor is fixedly provided with a second ball screw which is vertically downward, the screw shaft of the second ball screw passes through the bottom transverse frame of the square frame and the horizontal connecting plate, the bottom of the second ball screw is fixedly provided with a bearing, the bearing is provided with a fixed block, the top of the fixed block is fixedly connected with the bottom of the horizontal connecting plate through a connecting rod, in addition, two opposite side surfaces of the fixed block are respectively provided with a direction-adjusting tail wing, the screw nut of the second ball screw is fixedly provided with a bearing, and the horizontal connecting plate is fixedly connected with the bearing;
The length of the rod of the steering tail wing is equal to half of the length of the horizontal connecting plate, and a tail rudder is arranged at the tail part of the steering tail wing, and the area of the tail rudder is 75% of that of the pitching raft.
2. The method for using the 360-degree intelligent wave raft type aeration and oxygenation device according to claim 1, wherein the method comprises the following steps: the pitching raft is a light pitching raft.
3. The method for using the 360-degree intelligent wave raft type aeration and oxygenation device according to claim 1, wherein the method comprises the following steps: the vertical section of the inflator is arc-shaped.
4. The method for using the 360-degree intelligent wave raft type aeration and oxygenation device according to claim 1, wherein the method comprises the following steps: the square frame is attached to the cultivation net cage, and air outlets of the two air cylinder air outlet pipes are arranged in the cultivation net cage.
5. The method for using the 360-degree intelligent wave raft type aeration and oxygenation device according to claim 1, wherein the method comprises the following steps: a float switch is arranged on a vertical frame of the square frame.
6. The method for using the 360-degree intelligent wave raft type aeration and oxygenation device according to claim 1, wherein the method comprises the following steps: the FD motor and the control circuit are powered by a storage battery, and the storage battery is charged by a solar panel.
7. The method for using the 360-degree intelligent wave raft type aeration and oxygenation device according to claim 1, wherein the method comprises the following steps: the number of the connecting rods is two, and the connecting rods are respectively positioned at two sides of the second ball screw shaft.
8. The method for using the 360-degree intelligent wave raft type aeration and oxygenation device according to claim 1, wherein the method comprises the following steps: the top FD motor and the bottom FD motor are positioned opposite to each other in the vertical direction, and the screw shaft of the first ball screw and the screw shaft of the second ball screw are positioned opposite to each other in the vertical direction.
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| JPH0612765U (en) * | 1992-07-20 | 1994-02-18 | 三菱重工業株式会社 | Mooring type wave pumping equipment |
| CN103739062A (en) * | 2014-01-20 | 2014-04-23 | 尹则高 | Wave floater-type automatic aeration and oxygenation device |
| CN104381189A (en) * | 2014-10-09 | 2015-03-04 | 长沙理工大学 | Wave energy oxygen supply device utilizing horizontal-movement float |
| CN110410263A (en) * | 2019-07-18 | 2019-11-05 | 中国海洋大学 | Heaving float-type power generation oxygen-increasing device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0612765U (en) * | 1992-07-20 | 1994-02-18 | 三菱重工業株式会社 | Mooring type wave pumping equipment |
| CN103739062A (en) * | 2014-01-20 | 2014-04-23 | 尹则高 | Wave floater-type automatic aeration and oxygenation device |
| CN104381189A (en) * | 2014-10-09 | 2015-03-04 | 长沙理工大学 | Wave energy oxygen supply device utilizing horizontal-movement float |
| CN110410263A (en) * | 2019-07-18 | 2019-11-05 | 中国海洋大学 | Heaving float-type power generation oxygen-increasing device and method |
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