39 results about "Bubble curtain" patented technology

The invention relates to an environment-friendly blasting compaction method for treating a soft foundation, which is characterized in that: the environment-friendly blasting compaction method for constructing a dike starts with blasting shock wave energy and a transmission medium, reduces the blasting shock wave energy, changes the blasting influence transfer pathway and blocks the transmission medium of the shock wave; microsecond blasting is preferred; a construction method of combining the microsecond blasting with an exposed beach blasting is utilized when the blasting vibration influence area is in the range of low-tide dike head silt packets; and a construction method of combining the microsecond blasting with an air bubble curtain is utilized when the blasting vibration influence area is in the range of seawater in the lowest tide. The environment-friendly blasting compaction method for treating the soft foundation has the good effects of reducing the energy generated by the blasting compaction, blocking the transfer pathway of the blasting shock wave, reducing the powerful shock wave, the intense vibration and the noise generated by the blasting to the minimum and realizing blasting compaction environmental-friendliness construction.

The invention discloses an acoustic driving and protecting method for sousa chinensis in the construction sea area. The acoustic driving and protecting method for sousa chinensis in the construction sea area is studied out through the measurement on the sousa chinensis bioacoustics characters, sousa chinensis habitat background noise and construction project noise. The method mainly comprises a sound wall driving method, a noise driving method, an acoustic instrument driving method and a bubble curtain protecting method. The method can be used for driving the sousa chinensis in the oceaneering construction areas and fishery activity water areas, and the sousa chinensis is prevented from being hurt and killed by mistake in the engineering construction and fishery activities.

The invention discloses a snow-proof external sun-shading system applied to a Venlo type multi-span glass greenhouse. An aluminum foil bubble curtain with a sun-shading rate of 70 percent is adopted, and moves along the direction of a ridge. Double-layer plastic-coated [PE/PET/PA (polyethylene/polyethylene terephthalate/polyamide)] steel wire ropes with supporting and windproof functions are adopted, and are fixedly arranged on a metal structural net rack on the roof of the greenhouse at transverse intervals of 30 to 100cm which are determined by the material of the curtain. The metal structural net rack is fixedly arranged on roof gutters, and is higher than roof glass. The aluminum foil bubble curtain for sun shading is driven to move by a pulling roller. The aluminum foil bubble curtain can be reeled under the transmission of the pulling roller according to the magnitude of snowfall on snowy days, snow on the curtain can be transmitted to the ground on the outer side of the greenhouse at a certain time interval, the snow bearing time of the curtain can be set in advance, and the curtain returns to the roof to continue bearing the snow, so that pressure of snow loads on the roof of the greenhouse is greatly reduced (by over 80 percent). The external sun-shading system has the functions of regulating the illuminance, reducing the temperature, preserving heat and reducing the influence of natural disasters such as hailstones and blizzards; the accumulated snow on the roof can be removed in a timing way, so that a lightweight material can be selected for the steel structural design of the greenhouse, and the construction cost is lowered.

The invention relates to a bubble curtain generating device for protecting aquatic animals and a method thereof. The bubble curtain generating device comprises an air supply system formed by an air compressor and an air tank, and exhaust pipes which are connected with the air tank and are arranged in a water area at the outer side of an intake, wherein one end of each exhaust pipe close to the air tank is provided with a control system, and exhaust holes are arranged in the exhaust pipes at intervals. Two rows or more rows of exhaust pipes can be arranged, a protecting frame is arranged outside each exhaust pipe, and a lower water box is arranged at the tail end of each exhaust pipe. The control system has continuous / pulsed / intermittent air supply methods. The design method comprises the following steps of determining a layout range and the overall shape of a water bottom, designing the control system, selecting the air compressor and the air tank and the like. The device provided by the invention has the advantages of simple structure, easiness in installation, convenience in use and obvious effects. The compressed air generated by the air compressor is stored into an air storage tank, the air supply pressure and the air supply amount are adjusted by the control system, and the air is exhausted by the exhaust pipes arranged at the water bottom of the water area at the outer side of the intake to generate a bubble curtain in water to prevent fish from swimming forwards, thereby effectively preventing the fish from being sucked into the intake to cause deaths.

The invention discloses an experiment device and method for testing approach behavior of fishes on a bubble curtain and lamplight. The experiment device comprises an experiment water groove, wherein the inner part of the experiment water groove is separated into a plurality of channels with a U-shaped section through a plurality of flow splitting piers; a bubble pipe is arranged at the bottom of the experiment water groove; a flashing lamp belt is mounted on a vertical side wall of each channel; the bubble pipe is connected with an air supply pump through an air conveying pipe; an interceptingnet and a rectifying grid are arranged at the front end of the experiment water groove. The experiment device can be used for researching physiological response mechanisms of the fishes on a couplingeffect of various different factors and is applied to researches of basic ethology of the fishes.

Method and apparatus for producing a bubble curtain with a diversity of bubble diameters for purposes such as suppressing surface-related multiple reflections in marine seismic surveys. Bubble generating elements are used that combine porous wall material with discrete holes.

The invention relates to a novel pile driving noise reduction device. The novel pile driving noise reduction device comprises a noise reduction mechanism, an underwater air bag which is arranged on the speed reduction mechanism and from top to bottom and a ballast device arranged on the second end of the noise reduction mechanism. The speed reduction mechanism is of a cone structure with a large opening in one end and a small opening in the other end, the underwater air bag provides buoyancy for the cone structure, the large opening end of the cone structure is connected with the ballast device, the speed reduction mechanism comprises a high-pressure pipe which is spirally circled, a high-pressure rubber pipe circles from the small end of the noise reduction mechanism and extends to the large opening end of the noise reduction mechanism, multiple air holes are formed along the side wall of the high-pressure pipe, the high-pressure pipe is connected with an air compressor, and elastic small balls are arranged on the side wall of the noise reduction mechanism. The noise reduction device forms a bubble curtain, meanwhile, the curtain and the elastic small balls jointly form the noisereduction mechanism, and the noise reduction effect is achieved,

The invention relates to a bubble curtain contamination discharging system and a control method. The bubble curtain contamination discharging system involves a bubble curtain generating pipe with exhaust holes, a high-pressure gas supplying device for conveying high-pressure gas to the bubble curtain generating pipe, a first collecting module for collecting gas velocity at the exhaust holes, a second collecting module for collecting water velocity, a control module electrically connected with the first collecting module and the second collecting module, and an adjusting module for adjusting the flow of the high-pressure gas, wherein the adjusting module is electrically connected with the control module. In the operation process, the first collecting module and the second collecting moduleacquire the gas emission speed at the exhaust holes and the water velocity in real time, the control module processes collected data and controls the adjusting module to work, and the system can realize the real-time monitoring function, so that the control of the system is more accurate, the gas emission speed of the bubble curtain generating pipe can be adjusted according to the water velocity with different sizes, and the system is suitable for contamination discharge blocking operation in environments of ocean current or river speed with different sizes.

The invention discloses an air curtain noise reduction device for an offshore wind power farm. The air curtain noise reduction device comprises a bubble curtain arranged in the mode of surrounding theinner side of a steel pipe pile, and an aquiculture area is located in the bubble curtain; the bubble curtain is connected with the steel pipe pile; and the bubble curtain comprises an inner-layer waterproof layer and an outer-layer waterproof layer, a hollow structure is formed between the inner-layer waterproof layer and the outer-layer waterproof layer, a bubble generating device is arranged between the inner-layer waterproof layer and the outer-layer waterproof layer, and the bubble generating device is located on the lower part of the bubble curtain. According to the air curtain noise reduction device provided by the invention, shock absorption and noise reduction can be achieved, and oxygen can be continuously supplied to the aquiculture area to improve the living condition of fishschools.

The invention relates to a medicine application method for seawater net cage fish culture. An adopted medicine application device comprises a net cage, an adjustable bubble curtain netting device provided with a plurality of air distribution pipes located at the bottom of the inner side of the net cage, a medicine distribution ring provided with a medicine tank and located at the bottom of the net cage, a medicine supply device of a spiral medicine distribution pipe with the lower end communicating with the medicine distribution ring and a rotation driving device. The medicine application method comprises the following steps that (1), compressed air is sprayed out from a plurality of air distribution pipes at the bottom of the inner side of the net cage to form a bubble curtain net; (2), the air distribution pipes move towards the inner side to shrink the bubble curtain net, and fishes are driven to swim towards the inner side to be concentrated; and (3), medicine in the medicine tank of the medicine supply device is sprayed out from the spiral medicine distribution pipe and the medicine distribution ring to be applied to the fish, the rotation driving device drives the spiral medicine distribution pipe and the medicine distribution ring to rotate, the medicine is evenly distributed, the bubble curtain net prevents the medicine from flowing out, the concentration of the medicine in seawater on the inner side of the bubble curtain net is increased, and the medicine using amount is reduced. The medicine application method for seawater net cage fish culture is good in fish disease treatment effect.

The invention discloses a controllable net-free fish box, and relates to aquaculture. The controllable net-free fish box is provided with a base, a gas guide tube, a tubular gas source, a sound velocity gradient pore plate, an underwater loudspeaker and a rod-shaped support, wherein a circle of groove is formed in the periphery of the base and is used for placing a heavy object, so that the whole body is fixed at the water bottom of a breeding site; the tubular gas source is uniformly paved in the base, and the sound velocity gradient pore plate is arranged at the top of the base; the gas guide tube is arranged on the base and is used for connecting the tubular gas source with an external gas pump so as to generate nanobubbles; the nanobubbles form a bubble curtain under the action of the sound velocity gradient pore plate to surround an culture area; the underwater loudspeaker is nested on the sound wave rod-shaped support; the rod-shaped support is nested in the groove at the bottom of the base and penetrates through the sound velocity gradient pore plate to extend upwards, so that the underwater loudspeaker is arranged in the bubble curtain. Physics and acoustics are combined, and different-frequency sound wave isolation of the bubble curtain and the loudspeaker is utilized at the water bottom of the breeding site to replace a fishing net fence of a traditional net cage, so that net-free breeding is achieved.

The invention relates to an air bubble curtain generating device used for blocking deepwater blasting shock waves and a using method thereof. The air bubble curtain generating device is formed by connecting 1-5 high-pressure gas generating-releasing devices (1) through a connecting tube (2) and a gas injecting tube (3) or is formed by directly connecting the 1-5 high-pressure gas generating-releasing devices (1) to the gas injecting tube (3). Liquid-state gas (12) is filled in a housing of each high-pressure gas generating-releasing device, wherein the two ends of a resistance wire (11) in thehousing are correspondingly connected with ends of two guide wires (5) through two copper columns (8), the other ends of the two guide wires (5) are connected with a power supply (4) through a sealing cover (6), the high-pressure gas connecting tube at the outer side of the sealed end of the housing (13) communicates with a cavity of the housing (13), and a counter bore at a through hole of the cavity is equipped with a fixed-pressure energy-release sheet (15). The air bubble curtain generating device is simple in structure, is low in cost, is easy to operate, and has a more remarkable blocking effect, on blasting shock waves, under an a deep water environment, especially an ultra-deep water environment.

The invention provides a bottom blowing ventilation submersed nozzle. The bottom blowing ventilation submersed nozzle comprises a nozzle body and a nozzle lining composited on the inner wall of the nozzle body; a side hole is formed in the lower portion of the nozzle body, a cylindrical ventilation part is arranged on the bottom of the side hole, and is connected to an air chamber through an air way, the air chamber is communicated with an argon pipeline through an outer connection port, the outer connection port is horizontally arranged, the air way is located between the nozzle body and thenozzle lining, when the nozzle is used, argon with a certain pressure and flow is input into the nozzle air chamber through an argon blowing pipeline and is conveyed to the nozzle bottom ventilation part through the air way, an argon bubble curtain is formed on the bottom of the side hole, the argon bubbles can carry inclusions like aluminium oxide to rise to the position above the liquid face inmolten steel, deposition of the inclusions in the molten steel on the bottom of the side hole can be avoided, aluminium oxide inclusions are prevented from entering a casting blank, the casting blankinclusions can be reduced, and the casting blank quality is improved.

The invention relates to a bubble curtain multipurpose experiment table device comprising an experimental pool, a bubble curtain generating device and an auxiliary device; the experimental pool is anexperimental system area, the bubble curtain generating device comprises an air compressor, a rubber pipe and a perforated stainless steel pipe, and a bubble curtain generated by the perforated stainless steel pipe divides the experimental pool into a left area A and a right area B; the auxiliary device comprises various instruments and auxiliary equipment which is used for simulating real industrial and natural processes; the instruments comprise a computer-assisted radioactive particle tracking instrument, a laser Doppler wind speed measuring instrument, a particle image speed measuring instrument, a sewage turbidity meter, electrical resistivity imaging equipment, a blasting shock wave detector, a pressure sensor and an electrically conducting probe, and the auxiliary equipment comprises a stirring device, an LED background lamp, transverse water flow control equipment, a water suction pump and a wave manufacturing device. According to the invention, the complex dynamic process in the gas-liquid two-phase flow can be observed in detail, and the research on multiple mechanisms of the gas-liquid two-phase flow can be realized.

The invention relates to a bubble curtain sewerage system and a bubble curtain generation pipe. A pipe body of the bubble curtain generation pipe is provided with a plurality of exhaust holes at intervals in the own axis direction, the openings of the exhaust holes face the water surface, one end of the bubble curtain generation pipe is an air inlet end, the other end of the bubble curtain generation pipe is sealed, the air inlet end is used for accessing high-pressure gas, and the spacing between adjacent two exhaust holes decreases from the air inlet end to the other end. The spacing betweenadjacent two exhaust holes decreases from the air inlet end to the other end to improve the uniformity of the flow at the outlets of the exhaust holes, so that the gas flow velocity at each exhaust hole is approximately the same, so that a generated bubble curtain forms a uniform diaphragm to strengthen the disturbance of fluid in the flow direction, strengthen the exchange process of the fluid quality and energy, and the blocking effect is improved.

The invention belongs to the field of marine engineering vibration and noise, and provides an array truncated conical shell bubble curtain underwater piling noise reduction device, which includes a truncated conical shell, inner and outer ring pipes containing air holes, inner and outer standpipes, and an external air compressor , the truncated conical shell is connected with the inner and outer ring pipes through hooks, the inner and outer ring pipes are fixedly connected with the inner and outer vertical pipes through threaded four-way pipes, and the external air compressor is located in the whole The top of the structure is connected to the uppermost ends of the inner and outer vertical pipes through flexible pipes. The device of the present invention guides the propagation of sound waves obliquely through the conical shell in the low frequency band, effectively directional radiates sound waves with longer wavelengths, utilizes the irregularity of sea surface waves, and increases the sound wave propagation path to transmit and consume sound energy to the sea surface of the far sea; In the mid-to-high frequency band, the double-layer bubble curtain produced by the air holes along the inner and outer sides of the conical shell performs resonance absorption and diffuse scattering, effectively reducing noise pollution.

The invention discloses an ocean platform piling bubble curtain noise reduction amount calculation and analysis method. Comprising three calculation methods, namely an air curtain layer noise reduction amount calculation method under normal sound wave incidence, an underwater air curtain bubble curtain low-frequency finite element fluid-solid coupling analysis calculation method and a full-band acoustic analysis calculation method based on a statistical energy analysis method. The influence of various parameters of the air curtain on the noise reduction amount and the noise reduction amount of the bubble curtain under low frequency and high frequency are quantitatively calculated, and the problems that in the prior art, a mode of measuring noise distribution through a detection device with a certain distance from a piling noise source is large in data acquisition difficulty, high in measurement cost, long in period, narrow in applicability and the like are solved. Meanwhile, the quantitative calculation method can also be used for guiding optimization design and analysis of a bubble curtain noise reduction system.

The invention discloses a bubble curtain/foam board composite noise reduction method for underwater sound absorption and noise reduction. The method comprises the following steps: enabling bubbles to move upwards between two opposite porous surfaces of two foam boards to form a bubble curtain, and realizing the combination of bubble curtain noise reduction and foam material noise reduction. By means of the porous surface of the foam board, bubbles can be continuously refined through collision of the foam board and the foam board in the bubble rising process, and therefore the sound absorption and noise reduction effects of the bubble curtain are further enhanced; and the foam plate can support the bubble curtain, the influence of airflow and water flow on the bubble curtain is weakened, and the noise reduction effect is stabilized.