CN110980974A - 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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- 238000005273 aeration Methods 0.000 title claims abstract description 47
- 238000006213 oxygenation reaction Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 230000009471 action Effects 0.000 claims abstract description 5
- 238000009360 aquaculture Methods 0.000 claims description 13
- 244000144974 aquaculture Species 0.000 claims description 13
- 230000001360 synchronised effect Effects 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 abstract description 16
- 239000001301 oxygen Substances 0.000 abstract description 16
- 239000007789 gas Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 206010021143 Hypoxia Diseases 0.000 description 5
- 238000005276 aerator Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 241000630524 Taractes rubescens Species 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000007954 hypoxia Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035485 pulse pressure Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
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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
- 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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- 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 and oxygenation device and an aeration and oxygenation method thereof, wherein the device comprises a horizontal connecting plate, two opposite ends of the horizontal connecting plate are respectively hinged with a longitudinal rocking raft plate, two air cylinders are fixedly installed at the bottom of the horizontal connecting plate, one-way air inlet valves and one-way air outlet valves are installed in air inlet pipes and air outlet pipes of the air cylinders, and piston rods of the two air cylinders are respectively and fixedly installed at the bottoms of the longitudinal rocking raft plates adjacent to the air inlet pipes; the 360-degree intelligent wave raft type aeration and oxygenation device and the aeration and oxygenation method thereof can automatically and intermittently aerate and oxygenate water only by wave action, so that the content of dissolved oxygen in the water is increased, electric energy or fossil energy is not required to be consumed, and the device is environment-friendly and pollution-free.
Description
Technical Field
The invention belongs to the field of water body oxygen increasing equipment, and particularly relates to a 360-degree intelligent wave raft type aeration oxygen increasing device and an aeration oxygen increasing method thereof in the field.
Background
Molecular oxygen dissolved in water is called dissolved oxygen and is one of important indexes for representing the self-purification capacity of water environment and water body. The death of marine organisms such as fish and the like can be caused by too low concentration of dissolved oxygen, the water quality is polluted, and the serious ecological environment problem is caused. Since the middle of the twentieth century, water hypoxia has become an environmental and ecological problem facing the sea areas all over the world. Over the last 50 years, the average dissolved oxygen concentration in the global sea has decreased by about 2%. More than 400 'ecological dead zones' are formed in the world sea area due to oxygen deficiency, such as the parts of the sea areas of the Boragic sea, the black sea, the gulf of Mexico and the east sea of China, and the like, and the coverage area exceeds 2.45 multiplied by 105km2. Even more seriously, the number of anoxic sea areas in coastal areas is still growing at an exponential rate of 5.54% per year, and the global anoxic sea area situation is expected to be further exacerbated in the future.
In the traditional aquaculture industry, the problem of seawater oxygen deficiency is not obvious due to low aquaculture density. With the emergence of modern intensive aquaculture, the requirements on aquaculture density and product quality are continuously increased, and seawater hypoxia becomes one of the important reasons for limiting the expansion of aquaculture scale and improving economic benefits. Taking cage golden pomfret culture as an example: if the dissolved oxygen is less than 3 mg/L, the dead point is caused, and the golden pomfret is in good growth state, the dissolved oxygen should be kept above 5 mg/L, and above 9 mg/L, the golden pomfret can grow rapidly. Of the sea of BoragicThe "death area" has 2.64X 10 carbon losses per year due to prolonged continuous hypoxia5t, accounts for 30% of the total primary productivity of the whole wave sea, and causes the total yield reduction of fishery to reach 1.06 multiplied by 105t. The China marine ranch is in the accelerated construction period, 86 national-level marine ranch demonstration areas covering Bohai sea, yellow sea, east sea and south sea are built, 178 national-level marine ranch demonstration areas are planned to be built in 2025, and the national marine ranch scientific development is led.
At present, the aim of increasing oxygen to the water body is mainly realized at home and abroad by adopting physical, chemical, biological and other methods. The conventional aerator is mainly provided with an air compressor, an impeller aerator, a waterwheel aerator, a water-jet aerator and the like, but the conventional aerator has 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:
a360 intelligent wave raft formula aeration oxygenation device of degree, its improvement lies in: 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 installed at the bottom of the horizontal connecting plate, one-way air inlet valves are installed in air inlet pipes of the air cylinders, one-way air outlet valves are installed in air outlet pipes of the air cylinders, and piston rods of the two air cylinders are respectively and fixedly installed at the bottoms of the pitching raft plates adjacent to the air inlet pipes; the top of a horizontal connecting plate is provided with a square frame which is fixedly attached to a water surface facility through a support, the tops of two transverse frames of the square frame are respectively provided with an FD motor, power output shafts of the two FD motors are vertically downward, an output shaft of the top FD motor is fixedly provided with a first ball screw which is vertically downward, a screw shaft of the first ball screw penetrates 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 the screw nut of the first ball screw, a plate collecting support with a vertical cross section in a Pi shape is fixedly arranged on the bearing, the plate collecting support can rotate in the square frame around a bearing, the bottoms of two sides of the plate collecting support are respectively provided with a guide wheel, and the two guide wheels are respectively pressed at two ends of the horizontal connecting plate, which are hinged with a longitudinal raft; the output shaft of the FD motor at the bottom is fixedly provided with a vertically downward second ball screw, the screw shaft of the second ball screw penetrates through the bottom transverse frame and the horizontal connecting plate of the square frame, the bottom of the second ball screw is fixedly provided with a bearing, a fixed block is arranged on the bearing, 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 of the second ball screw is fixedly provided with the bearing, and the horizontal connecting plate is fixedly connected with the bearing.
Furthermore, the pitching raft is a light pitching raft.
Further, the vertical cross section of the inflator is arc-shaped.
Furthermore, the square frame is attached to the aquaculture net cage, and air outlets of air outlet pipes of the two air cylinders are arranged and are thrown into the aquaculture net cage.
Furthermore, a float switch is arranged on a vertical frame of the square frame.
Furthermore, the FD motor and the control circuit are powered by a storage battery, and the storage battery is charged by a solar cell panel.
Furthermore, the number of the connecting rods is two, and the two connecting rods are respectively positioned on two sides of the second ball screw shaft.
Further, the top FD motor and the bottom FD motor are opposite in position in the vertical direction, and the screw shaft of the first ball screw and the screw shaft of the second ball screw are opposite in position in the vertical direction.
Furthermore, the length of the rod of the steering tail wing is equal to half of the length of the horizontal connecting plate, a tail rudder is installed at the tail part of the steering tail wing, and the area of the tail rudder is 75 percent of that of the pitching raft.
The improvement of the aeration and oxygenation method using the device is 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 height of the horizontal connecting plate is adjusted by sliding the screw nut along the screw shaft, so that the part of the longitudinal raft plates at the two ends of the horizontal connecting plate extends into water, and the part of the longitudinal raft plates is exposed out of the water surface, then the bottom FD motor is closed, the longitudinal raft plates drive the piston rods to reciprocate under the action of waves, air enters the air cylinders through the air inlet pipes by virtue of the one-way air inlet valves when the piston rods are pulled out, and the air is discharged through the air outlet pipes by virtue of the one-way air outlet valves when the piston rods are pressed in, so that intermittent air suction from; when the direction-adjustable tail wing is not collinear with the incident direction of the waves, the direction-adjustable tail wing can drive the fixing block to rotate around the screw shaft of the second ball screw under the pushing of the waves, the fixing block drives the horizontal connecting plate to rotate around the screw shaft of the second ball screw, the horizontal connecting plate drives the plate-retracting bracket to rotate around the screw shaft of the first ball screw, the rotation of the fixing block, the rotation of the horizontal connecting plate and the plate-retracting bracket are synchronous, the rotation is stopped until the direction-adjustable tail wing is collinear with the incident wave direction of the water flow, and the longitudinal rocking rafts at the two ends of the horizontal connecting plate are opposite to 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 a nut down along the screw shaft to enable a plate-retracting bracket to move downwards, sliding guide wheels on two sides of the plate-retracting bracket down along a pitching raft opposite to the nut, retracting the pitching rafts on two ends of a horizontal connecting plate, closing the top FD motor, then starting a bottom FD motor to drive a screw shaft of a second ball screw to rotate, sinking the horizontal connecting plate to a certain depth under water through sliding the nut down along the screw shaft, closing the bottom FD motor to avoid waves, when the wave height is reduced below the set value, firstly starting the bottom FD motor to drive the screw shaft of the second ball screw to rotate, adjusting the height of the horizontal connecting plate through sliding the nut along the screw shaft, enabling the pitching rafts on two ends of the horizontal connecting plate to partially extend into the water and partially expose out of the water surface, closing the bottom FD motor, then starting the top FD motor to drive the screw shaft of the first ball screw to rotate, and the plate folding support is moved upwards by sliding a nut of the plate folding support along a screw shaft, guide wheels on two sides of the plate folding support slide along the longitudinal rocking rafts opposite to the guide wheels, and the top FD motors are closed after the longitudinal rocking rafts at two ends of the horizontal connecting plate are released, so that the normal operation is recovered.
The invention has the beneficial effects that:
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 the water body only under the 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 device is environment-friendly and pollution-free, and the problem that the conventional oxygen supply device consumes a large amount of energy can be solved. The direction-adjusting tail wing drives the horizontal connecting plate to automatically turn 360 degrees along with the change of incident wave direction, so that the pitching rafts at the two ends of the horizontal connecting plate can always face the incident waves, and the aeration efficiency is maximized. Under the condition of severe wave conditions, the plate retracting support is moved downwards so as to retract the longitudinal raft, then the horizontal connecting plate is sunk to a certain depth under water to carry out wave-avoiding 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, then the longitudinal raft is released, and the device continues to operate normally.
The 360-degree intelligent wave raft type aeration and oxygenation device and the aeration and oxygenation method thereof disclosed by the invention can be applied to the aspects of aquaculture in anoxic sea areas, marine environment protection and improvement, safety protection of coastal structures and near-shore structures and the like, can be widely applied to deep sea cage culture and artificial island 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, are favorable for realizing the coordination development of marine environment protection and fishery economy, and have wide application prospects.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus disclosed in embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram of an aeration and oxygenation system in the apparatus disclosed in embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram of an intelligent lifting system in the device disclosed in embodiment 1 of the present invention;
FIG. 4 is a schematic structural view of a 360 DEG steering system in the apparatus disclosed in embodiment 1 of the present invention;
FIG. 5 is a schematic plan view of an apparatus for indoor physical model test according to example 1 of the present invention;
FIG. 6a is a graph of average aeration flow rate versus wave period for a raft of aspect ratio 0.75 and aeration depth 0.1m for the device disclosed in example 1 of the present invention;
FIG. 6b is a graph of the average aeration flow rate versus the wave period for a raft of length to width ratio of 1.25 and aeration depth of 0.4m for the device disclosed in example 1 of the present invention;
FIG. 6c is a graph of average aeration flow rate versus wave period for a 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 of a pitch raft of the apparatus disclosed in example 1 of the present invention;
fig. 8 is a verification plot of the displacement simulation values and the measured values of the pitching rafts of the apparatus disclosed in example 1 of the present invention;
fig. 9 is a graph of the relationship of the pressure of the pitching raft of the apparatus disclosed in embodiment 1 of the present invention varying periodically with the wave.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Embodiment 1, as shown in fig. 1, this embodiment discloses a 360 ° intelligent wave raft type aeration and oxygenation device, which includes an aeration and oxygenation system 2 composed 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; a 360-degree steering system 3 consisting of a fixed block, a connecting rod and a direction-adjusting tail wing.
Specifically, as shown in fig. 2, the device comprises a horizontal connecting plate 21, a piece of pitching raft 22 is hinged at each of two opposite ends of the horizontal connecting plate, two air cylinders 23 are fixedly installed at the bottom of the horizontal connecting plate, a one-way air inlet valve is installed in an air inlet pipe 24 of each air cylinder, a one-way air outlet valve is installed in an air outlet pipe 25 of each air cylinder, and piston rods 231 of the two air cylinders are respectively and fixedly installed at the bottoms of the pitching rafts 22 adjacent to the two air cylinders; the top of a horizontal connecting plate is provided with a square frame 10 which is fixedly attached to a water surface facility through a support, the tops of two transverse frames of the square frame are respectively provided with an FD motor, power output shafts of the two FD motors are vertically downward, as shown in figure 3, an output shaft of a top FD motor 11 is fixedly provided with a first ball screw 12 which is vertically downward, a screw shaft of the first ball screw penetrates through the top transverse frame of the square frame, the bottom of the first ball screw is close to the FD motors on the transverse frame at the bottom of the square frame, a bearing is fixedly arranged on a screw nut 13 of the first ball screw, a plate collecting support 14 with a vertical section being n-shaped is fixedly arranged on the bearing, the plate collecting support can rotate in the square frame around the shaft, the bottoms of two sides of the plate collecting support are respectively provided with a guide wheel 15, and the two guide wheels are respectively pressed at two ends of the horizontal connecting plate, which are hinged with a pitching raft; a vertically downward second ball screw 17 is fixedly mounted on an output shaft of the bottom FD motor 16, a screw shaft of the second ball screw passes through a bottom horizontal frame and a horizontal connecting plate of the square frame, as shown in fig. 4, a bearing 31 is fixedly mounted at the bottom of the second ball screw 17, a fixed block 32 is mounted on the bearing, the top of the fixed block and the bottom of the horizontal connecting plate are fixedly connected through a connecting rod 33, a direction-adjusting tail wing 34 is respectively mounted on two opposite side surfaces of the fixed block, a bearing is fixedly mounted on a screw nut 18 of the second ball screw, and the horizontal connecting plate is fixedly connected with the bearing.
In this embodiment, the pitching raft is a lightweight pitching raft. The vertical section of the inflator is arc-shaped. The square frame is attached to the aquaculture net cage, and the air outlets of the air outlet pipes of the two air cylinders are all thrown into the aquaculture net cage. Also can be attached to a plurality of the devices on the same aquaculture net cage. A float switch is arranged on a vertical frame of the square frame, if the float switch is hit by a wave, the wave height is judged to exceed a set value, and the device carries out 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 cell panel. The number of the connecting rods is two, and the two connecting rods are respectively positioned on two sides of the second ball screw shaft. The top FD motor and the bottom FD motor are opposite in position in the vertical direction, and the screw shaft of the first ball screw is opposite in position in the vertical direction with the screw shaft of the second ball screw. The length of the rod of the steering tail wing is equal to half of the length of the horizontal connecting plate, and the tail rudder is arranged at the tail part of the steering tail wing and has the area of 75 percent of that of the pitching raft.
The embodiment also discloses an aeration and oxygenation method, the device is used, 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 height of the horizontal connecting plate is adjusted by sliding the screw nut along the screw shaft, the part of the longitudinal raft plates at the two ends of the horizontal connecting plate extends into the water, the part of the longitudinal raft plates is exposed out of the water surface, the bottom FD motor is closed, the longitudinal raft plates drive the piston rods to reciprocate under the action of waves and buoyancy force borne by the longitudinal raft plates, air enters the air cylinders through the air inlet pipes by the one-way air inlet valves when the piston rods are pulled out, and the air is discharged through the air outlet pipes by the one-way air outlet valves when the piston rods are pressed in, so that intermittent air suction from the; when the direction-adjustable tail wing is not collinear with the incident direction of the waves, the direction-adjustable tail wing can drive the fixing block to rotate around the screw shaft of the second ball screw under the pushing of the waves, the fixing block drives the horizontal connecting plate to rotate around the screw shaft of the second ball screw, the horizontal connecting plate drives the plate-retracting bracket to rotate around the screw shaft of the first ball screw, the rotation of the fixing block, the rotation of the horizontal connecting plate and the plate-retracting bracket are synchronous, the rotation is stopped until the direction-adjustable tail wing is collinear with the incident wave direction of the water flow, and the longitudinal rocking rafts at the two ends of the horizontal connecting plate are opposite to 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 nut slides down along the screw shaft to enable the plate collecting support to move downwards, the guide wheels on two sides of the plate collecting support slide down along the pitching rafts opposite to the guide wheels, the pitching rafts at two ends of the horizontal connecting plate are collected, the top FD motor is closed (the horizontal connecting plate is conveniently sunk into a relatively stable water layer in the next step to prevent the waves from being too large to damage the pitching rafts), the bottom FD motor is started to drive the screw shaft of the second ball screw to rotate, the nut slides down along the screw shaft to enable the horizontal connecting plate to sink to a certain depth under water, the bottom FD motor is closed to avoid waves, when the wave height is reduced below the set value, the bottom FD motor is started to drive the screw shaft of the second ball screw to rotate, the height of the horizontal connecting plate is adjusted by sliding the nut along the screw shaft, the portions of the pitching rafts at two ends of the horizontal connecting plate extend into water, and the bottom FD motor is driven, And after part of the FD motor is exposed out of the water surface, the top FD motor is closed, the screw shaft of the first ball screw is driven to rotate by starting the top FD motor, the plate folding support is moved upwards by the screw nut along the screw shaft, the guide wheels on two sides of the plate folding support are moved upwards along the pitching rafts opposite to the guide wheels, the top FD motor is closed after the pitching rafts at two ends of the horizontal connecting plate are released, and the normal operation is recovered.
The apparatus was subjected to an indoor physical model test according to the arrangement of fig. 5:
four devices with different length-width ratios of the raft are manufactured, typical wave parameters are combined, physical model test research is carried out, and specific working conditions are shown in the table. Wherein the aeration depth h is the vertical distance from the aeration port to the hydrostatic surface.
Test parameter table (depth d is 0.6m)
| Period T(s) | Wave height H (m) | Aeration depth h (m) | Raft board length c (m) | Raft board width d (m) | Length-width ratio a of raft board |
| 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 the experimental observation, BG-2 type wave height instrument (with the precision of 1mm) is used for observing the wave height in real time, a pulse pressure sensor (with the precision of 0.1Pa) is used for observing the wave pressure applied to the pitching raft in real time, an HVS-120T inclination angle sensor (with the precision of 0.001 degree) is used for observing the angle change of the pitching raft in real time, and an MF5700 gas mass flow meter (with the precision of 0.001m3) is used for observing the change process of the air suction and doping flow in real time.
Analysis of experimental data shows that the gas doping flow of the devices with the aspect ratios of 0.75, 1, 1.25 and 1.5 respectively reaches the maximum under the conditions of the gas doping depth of 0.1m, the wave height of 0.16m and the period of 1.2s wave, and respectively reaches 16.00L/min, 10.67L/min, 11.33L/min and 10.00L/min.
The average dopant gas flow rate versus wave period is shown in fig. 6a, 6b, 6 c. The average entrainment flow rate substantially shows a decreasing trend as the wave period increases. It is noted that in fig. 6a, when T is about 2.1s, the average doping gas flow rate has a secondary peak, probably because the natural oscillation period of the device is close to the wave period. It can also be seen from fig. 6a, 6b and 6c that the smaller the aeration depth, the greater the incident wave height, and the greater the aeration flow rate. Under the condition of certain aeration depth and incident wave height, the aeration flow of the device with the small length-width ratio of the raft is larger.
According to related data, the power consumption power of a common YL-1.5 impeller type oxygen increasing machine is 1.5kW, and the average oxygen increasing capacity is about 2.3 kg/h; the device consumes no electricity in the aeration and oxygenation process, and the average oxygenation capacity of the device is about 0.4kg/H when a is 0.75, H is 0.1m, H is 0.16m and T is 1.2 s. Assuming that the total oxygen increasing amount is equal (the impeller type oxygen increasing machine works for 4h, the device works for 23h), the device can save electricity by about 6 kW.h every day, calculated by the power consumption of the Qingdao industry in Shandong per kilowatt of 0.8 yuan, the device can save electricity by 4.8 yuan a day, assuming that the device works for 11 months in a year, the device can be expected to save electricity by 1980 kW.h, and save electricity by 1584 yuan.
And carrying out hydrodynamic analysis by using an AQWA-LINE module of ANSYS software to finally obtain data such as the motion displacement of the pitching raft, the numerical values of transverse force and vertical force of waves acting on the device, the motion moment of the hinged part and the like. Fig. 7 is a numerical modeling diagram of the device pitch rafts, four devices were validated and pitch raft pressures were calculated for two wave conditions, with the calculation parameters given in the table below.
Calculation parameter table (depth of water d 0.6m, H0.16 m, H0.1 m)
| Period T(s) | Raft plate c (m) | Raft board width d (m) | Length-width ratio a of raft board |
| 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 when a is 1.0, H is 0.1m, T is 1.2s, and H is 0.16m, the curves of the numerical simulation values and the test measurement values substantially match, and it is verified that the displacement simulation values and the measurement values substantially match, which represents that the set parameters of the numerical simulation are correct. When H is 0.1m, T is 1.2s, and H is 0.16m, the relationship between the pressure level and the periodic variation of the wave is shown in fig. 9. The length-width ratio of the longitudinal rafts is 0.75, each peak value of the average pressure intensity of the wave-facing surface of the longitudinal rafts in the front row is the largest, and the length-width ratios of the longitudinal rafts are 1, 1.25 and 1.5 respectively.
The length-width ratio of the raft is smaller, the longitudinal raft is closer to a vertical state when standing still on a still water surface, the fluctuation pressure acting on the longitudinal raft is larger, and the fluctuation pressure is consistent with the physical test result. The device with small length-width ratio has larger average doping gas flow and larger wave force, which puts higher requirements on the structure and material performance of the device.
Claims (10)
1. The utility model provides a 360 intelligence wave raft formula aeration oxygenation device which characterized in that: 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 installed at the bottom of the horizontal connecting plate, one-way air inlet valves are installed in air inlet pipes of the air cylinders, one-way air outlet valves are installed in air outlet pipes of the air cylinders, and piston rods of the two air cylinders are respectively and fixedly installed at the bottoms of the pitching raft plates adjacent to the air inlet pipes; the top of a horizontal connecting plate is provided with a square frame which is fixedly attached to a water surface facility through a support, the tops of two transverse frames of the square frame are respectively provided with an FD motor, power output shafts of the two FD motors are vertically downward, an output shaft of the top FD motor is fixedly provided with a first ball screw which is vertically downward, a screw shaft of the first ball screw penetrates 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 the screw nut of the first ball screw, a plate collecting support with a vertical cross section in a Pi shape is fixedly arranged on the bearing, the plate collecting support can rotate in the square frame around a bearing, the bottoms of two sides of the plate collecting support are respectively provided with a guide wheel, and the two guide wheels are respectively pressed at two ends of the horizontal connecting plate, which are hinged with a longitudinal raft; the output shaft of the FD motor at the bottom is fixedly provided with a vertically downward second ball screw, the screw shaft of the second ball screw penetrates through the bottom transverse frame and the horizontal connecting plate of the square frame, the bottom of the second ball screw is fixedly provided with a bearing, a fixed block is arranged on the bearing, 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 of the second ball screw is fixedly provided with the bearing, and the horizontal connecting plate is fixedly connected with the bearing.
2. The 360 ° intelligent wave raft aeration oxygenation device of claim 1, wherein: the longitudinal raft is a light longitudinal raft.
3. The 360 ° intelligent wave raft aeration oxygenation device of claim 1, wherein: the vertical section of the inflator is arc-shaped.
4. The 360 ° intelligent wave raft aeration oxygenation device of claim 1, wherein: the square frame is attached to the aquaculture net cage, and the air outlets of the air outlet pipes of the two air cylinders are all thrown into the aquaculture net cage.
5. The 360 ° intelligent wave raft aeration oxygenation device of claim 1, wherein: a float switch is arranged on a vertical frame of the square frame.
6. The 360 ° intelligent wave raft aeration oxygenation device of claim 1, wherein: the FD motor and the control circuit are powered by a storage battery, and the storage battery is charged by a solar cell panel.
7. The 360 ° intelligent wave raft aeration oxygenation device of claim 1, wherein: the number of the connecting rods is two, and the two connecting rods are respectively positioned on two sides of the second ball screw shaft.
8. The 360 ° intelligent wave raft aeration oxygenation device of claim 1, wherein: the top FD motor and the bottom FD motor are opposite in position in the vertical direction, and the screw shaft of the first ball screw is opposite in position in the vertical direction with the screw shaft of the second ball screw.
9. The 360 ° intelligent wave raft aeration oxygenation device of claim 1, wherein: the length of the rod of the steering tail wing is equal to half of the length of the horizontal connecting plate, and the tail rudder is arranged at the tail part of the steering tail wing and has the area of 75 percent of that of the pitching raft.
10. An aeration and oxygenation method using the device of claim 1, wherein: 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 height of the horizontal connecting plate is adjusted by sliding the screw nut along the screw shaft, so that the part of the longitudinal raft plates at the two ends of the horizontal connecting plate extends into water, and the part of the longitudinal raft plates is exposed out of the water surface, then the bottom FD motor is closed, the longitudinal raft plates drive the piston rods to reciprocate under the action of waves, air enters the air cylinders through the air inlet pipes by virtue of the one-way air inlet valves when the piston rods are pulled out, and the air is discharged through the air outlet pipes by virtue of the one-way air outlet valves when the piston rods are pressed in, so that intermittent air suction from; when the direction-adjustable tail wing is not collinear with the incident direction of the waves, the direction-adjustable tail wing can drive the fixing block to rotate around the screw shaft of the second ball screw under the pushing of the waves, the fixing block drives the horizontal connecting plate to rotate around the screw shaft of the second ball screw, the horizontal connecting plate drives the plate-retracting bracket to rotate around the screw shaft of the first ball screw, the rotation of the fixing block, the rotation of the horizontal connecting plate and the plate-retracting bracket are synchronous, the rotation is stopped until the direction-adjustable tail wing is collinear with the incident wave direction of the water flow, and the longitudinal rocking rafts at the two ends of the horizontal connecting plate are opposite to 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 a nut down along the screw shaft to enable a plate-retracting bracket to move downwards, sliding guide wheels on two sides of the plate-retracting bracket down along a pitching raft opposite to the nut, retracting the pitching rafts on two ends of a horizontal connecting plate, closing the top FD motor, then starting a bottom FD motor to drive a screw shaft of a second ball screw to rotate, sinking the horizontal connecting plate to a certain depth under water through sliding the nut down along the screw shaft, closing the bottom FD motor to avoid waves, when the wave height is reduced below the set value, firstly starting the bottom FD motor to drive the screw shaft of the second ball screw to rotate, adjusting the height of the horizontal connecting plate through sliding the nut along the screw shaft, enabling the pitching rafts on two ends of the horizontal connecting plate to partially extend into the water and partially expose out of the water surface, closing the bottom FD motor, then starting the top FD motor to drive the screw shaft of the first ball screw to rotate, and the plate folding support is moved upwards by sliding a nut of the plate folding support along a screw shaft, guide wheels on two sides of the plate folding support slide along the longitudinal rocking rafts opposite to the guide wheels, and the top FD motors are closed after the longitudinal rocking rafts at two ends of the horizontal connecting plate are released, so that the normal operation is recovered.
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| CN201911230521.5A CN110980974B (en) | 2019-12-05 | 2019-12-05 | 360-Degree intelligent wave raft type aeration and oxygenation device and aeration and oxygenation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113016704A (en) * | 2021-03-12 | 2021-06-25 | 中国海洋大学 | Self-propelled aeration oxygenation ship based on OWC principle and oxygenation method thereof |
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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 |
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| CN113016704A (en) * | 2021-03-12 | 2021-06-25 | 中国海洋大学 | Self-propelled aeration oxygenation ship based on OWC principle and oxygenation method thereof |
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