57 results about "Bubble curtain" patented technology

The invention belongs to the technical field of hydroacoustic detection, and particularly relates to a high-precision multi-beam sonar with echo noise suppression, the high-precision multi-beam sonar comprises a sonar detector, a transducer and a heater, the transducer is arranged in the middle of the inner side of the sonar detector, and the heater is arranged in the sonar detector. The sonar detector converts electric energy into a sound wave signal through a transducer by arranging the flow guide cover, the honeycomb damping shell, the silica gel damping agent filling layer, the reflection energy absorption frame, the variable-diameter reflection hole and the active isolation mechanism, and the sound wave signal is propagated in water. When sound waves rebound after encountering obstacles and being reflected, the honeycomb damping shell converts sound energy into heat energy through viscous friction of the silica gel damping agent filling layer in the honeycomb damping shell, and the honeycomb structure prolongs the noise propagation time through multiple reflection paths. The active isolation mechanism guides gas in a high-pressure helium tank through a micro air pump and enables the gas to be sprayed out of an air spraying hole, a bubble curtain with the diameter smaller than 1 mm is continuously manufactured to form an impedance abrupt change layer, and the influence of noise is further reduced.

The invention relates to the technical field of data processing, and discloses a hydropower station fish gathering system inlet flow field adaptability optimization method and system. The method comprises the following steps: grading target fishes according to swimming speed and body length, setting a flow velocity adaptation threshold value, monitoring a flow field through an acoustic Doppler current meter, fusing data by using a Kalman filtering algorithm, calculating a fish rheotaxis index, and carrying out matching analysis to evaluate the adaptability of the flow field, according to the evaluation result, the flow guide pier and the microbubble curtain are controlled to conduct multi-stage linkage regulation and control, and a fuzzy PID control algorithm is adopted to achieve self-adaptive flow field control with the fish hydrotaxis index as a feedback signal. The problem that flow field optimization lacks fish behavior response feedback and multi-device coordination control in the prior art is solved, and the biological adaptability and the regulation and control precision of the inlet flow field of the fish gathering system are improved.

The invention belongs to the field of water conservancy projects, and particularly relates to a concrete dam body anti-icing air blowing structure which comprises a disc-shaped spiral air pipe, a plurality of spokes, an internal thread air cap, a turbulent flow component, a floating raft component and a reciprocating pneumatic device.The concrete dam body anti-icing air blowing structure adopts three core designs of disc-shaped spiral air pipe airflow optimization, multi-stage turbulent flow linkage and floating raft self-adaptive adjustment; a bubble curtain generated by the disc-shaped spiral air pipe bursts on the surface layer of the water body; meanwhile, the spoiler swings to disperse the water to multiple sides, and surface water flow movement is accelerated; vertical vortexes are generated in combination with movement of the water rolling wheels to promote heat exchange of upper and lower water layers and destroy an ice layer crystallization environment; the inhibition effect on ice layer crystallization is improved through multi-directional disturbance and heat exchange of the horizontal layer and the vertical layer; the problems of uneven airflow, insufficient disturbance, poor adaptability and the like in a traditional anti-icing technology are solved, and the efficient, energy-saving and long-service-life dam body anti-icing effect is achieved.

The invention belongs to the technical field of fish blocking bubble curtain devices, and particularly relates to a fish blocking bubble curtain generating device which comprises a bubble curtain device, the bubble curtain device comprises a fish blocking display curtain and a first top plate, a waterproof function box is fixedly installed at the bottom of the fish blocking display curtain, and a plurality of transparent partition plates are fixedly installed in the fish blocking display curtain; a component groove is formed in the inner top of the waterproof function box, an oxygen pipe I and a waterproof strip are mounted in the component groove, a plurality of stroboscope lamps are fixedly mounted on the upper side of the waterproof strip, and a plurality of groups of rising bubbles are formed in the fish blocking display screen through oxygen; fish and other organisms observe rising bubbles in the fish blocking display screen through vision, the purpose of blocking the fish from entering the water intake is achieved, meanwhile, the stroboscope lamp is powered on to act and emit light flashing according to frequency, the fish is driven through changes of light intensity or light color within a short time, and the fish is prevented from entering the water intake position.

The invention discloses a needle head bubble generator device and a sound insulation measurement method, which can reduce noise propagation by generating a bubble curtain in a needle head device and utilizing the sound absorption characteristic of the bubble curtain. The method mainly comprises the following steps: determining parameters of a needle device, and constructing a bubble curtain model of the needle device; a high-speed camera is used for shooting clear pictures of the bubbles, and an edge detection algorithm is used for solving a bubble diameter distribution rule; the emission frequency is changed, and sound insulation optimization is carried out on the resonance radius of the bubble curtain; the layer number and the inflation flow of the needle head device are changed, and sound insulation optimization is carried out on the volume concentration of the bubble curtain. The method has the advantages of being easy and convenient to operate, wide in application range, remarkable in noise reduction effect and the like, and has application value for various underwater noise control occasions.

The present invention discloses a protective device for structures adjacent to underwater blasting, comprising a receiving structure, a first elastic member, a box assembly and a bubble curtain device, wherein the receiving structure is used to connect with a protected main body, and the receiving structure has a receiving portion arranged in a crisscross pattern, a plurality of first elastic members are arranged on the side of the receiving portion away from the protected main body, the box assembly is arranged in front of the receiving structure, and the box assembly abuts against the first elastic member, and the bubble curtain device is arranged on the side of the box assembly away from the receiving structure. During underwater blasting, the bubble curtain device can reduce the shock wave of the blasting, the box assembly can block the remaining shock wave and flying rocks, and the first elastic member and the receiving structure can buffer the vibration and increase the force-bearing area of ​​the protected main body, thereby reducing the impact on the protected main body and improving the protection effect.

The invention discloses a calculation method and application of an underwater random bubble curtain pressure value simulation model. The method comprises the following steps: firstly, establishing a bubble generation model based on random characteristics, and realizing random distribution of bubble positions and sizes through an MATLAB program and a randperm function; then, a fluid and bubble dynamics bidirectional coupling model is constructed, and pressure field association is established by keeping grid sizes consistent; generating a grid by adopting an SALE method, and combining the bubble model, the target plate model and the fluid model through open and import commands; and finally, carrying out numerical calculation by adopting an LS-DYNA solver, iteratively adjusting parameters based on an optimization algorithm, and outputting a pressure value simulation result. According to the method, full-process automatic modeling is realized, the efficiency is improved by more than 50%, million unit-level large-scale calculation is supported, the model precision is high, the universality is high, and the method can be widely applied to simulation analysis and device optimization of underwater noise reduction, antifouling and oxygenation scenes.

The invention relates to the technical field of intelligent automatic grading, in particular to an automatic grading fishing method and system for perches based on living body dynamic perception. The method comprises the following steps: acquiring multi-source perch state sensing data, and based on the multi-source perch state sensing data, performing cross-modal fusion analysis of living body behaviors and physiological appearances according to preset body shape reference parameters to obtain a body shape-stress fusion evaluation information set; based on this, analyzing the matching relationship between the perch body type state, the stress state and the grading fishing target pool, and generating a perch differentiation grading guide strategy set; on the basis, dynamic flow direction regulation and control are carried out through a bubble curtain, the stress perch individuals are drained to the redundant pool, after the stress states of the stress perch individuals are relieved through anti-stress treatment in the redundant pool, secondary flow guide distribution is carried out on the stress perch individuals according to body type evaluation, and a perch automatic grading catching log is output. And the automation level and the sorting accuracy of aquaculture grading fishing are improved.

The invention relates to a multi-layer composite protection and energy dissipation system for an island reef to resist underwater explosion and an installation method. The multi-layer composite protection and energy dissipation system comprises an island reef body; the energy dissipation layer is annularly arranged on the periphery of the sea island reef disc body at intervals of a preset space and comprises an elastic energy absorption part and an energy dispersion framework, the elastic energy absorption part is arranged on the outer side of the energy dissipation layer, and the energy dispersion framework is arranged on the inner side of the energy dissipation layer and fixedly connected with the elastic energy absorption part; the active energy dissipation layer is annularly arranged between the energy dissipation layer and the sea island reef plate body and comprises an early warning system and a plurality of bubble generating devices, the early warning system is associated with the bubble generating devices, and the early warning system is suitable for monitoring underwater explosion signals and triggering the bubble generating devices to release bubbles to form a bubble curtain; the bubble curtain is adapted to dissipate residual energy through the energy dissipation layer. The system has the outstanding characteristics of multi-layer energy absorption, intelligent monitoring and active defense, can be widely applied to protection of the bottom of the sea island reef disc, and effectively resists impact of underwater explosion on the sea island foundation.

The invention discloses an underwater blasting shock wave energy absorption device based on bubble energy release, belongs to the technical field of underwater blasting protection, and solves the problem that an existing gas curtain energy absorption device is insufficient in energy absorption effect due to the fact that turbulent vortex generated after bubble collapse is not utilized. According to the invention, the plurality of spherical bubble diffusers and the plurality of nozzles which are vertically distributed on the L-shaped base form a layered bubble regulation and control system, and the nozzles generate high-speed millimeter-level bubbles to disturb a micron-level bubble curtain wall of the spherical diffusers above; the speed difference of bubbles in a high-speed millimeter-level bubble and micron-level bubble curtain wall is utilized to cause instability of a shearing layer and generate multi-scale vortexes, local speed gradient and vortex interference are formed, the effect is that wake flow vortexes of the high-speed millimeter-level bubbles guide large-scale energy dissipation, meanwhile, the turbulence intensity in the bubble curtain wall is enhanced, and the energy consumption is reduced. And finally, kinetic energy is efficiently converted into heat energy through viscous dissipation, and the energy absorption rate is increased.

Apparatus for generating a uniform bubble curtain in open bodies of water with an irregular bottom, comprising a compressor and an air or gas distributor-controller device, main and secondary feed ducts and a series and staggered arrangement of diffuser duct segments connected to the secondary feed ducts. Bubble curtain generating apparatus for open water bodies of irregular bottom, generating a uniform bubble curtain and comprising: an air or gas compressor, a main feed duct for compressed air or gas connected to the compressor outlet; a distributor-controller device for compressed air or gas connected to the main feed duct, multiple secondary feed ducts connected to the distributor-controller device for compressed air or gas and a series and staggered arrangement of multiple straight and horizontal segments of diffuser duct, fixed at a certain depth above the bottom of the open water body by supports. The diffuser duct segments are independently connected to corresponding secondary feed ducts and have micro-perforations for the release of ascending bubbles of compressed air or gas in the open water body. The compressed air or gas distributor-controller device comprises means for regulating the pressure and flow rate of air or gas of each diffuser duct segment according to the depth at which it is located and its distance relative to the compressed air or gas distributor-controller device.

The invention belongs to the technical field of water outlet equipment, and discloses a water outlet device which is characterized in that a shell is provided with an inner cavity; the water inlet piece is mounted in the inner cavity, and a plurality of water inlet channels are formed in the water inlet piece; the water passing piece is installed in the inner cavity and located on the downstream side of the water inlet piece, a negative pressure cavity is defined between the water inlet piece and the water passing piece, an air inlet cavity is defined between the peripheral wall of the water passing piece and the shell, a plurality of water passing channels, a plurality of air return holes and a plurality of air inlet through holes are formed in the water passing piece, and the water inlet channels and the water passing channels are in one-to-one alignment. The air inlet through holes are distributed in the peripheral side of the area where the water passing channels are located, and at least part of the air return holes are located between the air inlet through holes and the water passing channels. The cutting assembly is installed in the inner cavity and located on the downstream side of the water passing piece. When water pressure fluctuates and water in the negative pressure cavity tries to leak outwards from the air inlet through hole, the bubble curtain can disturb water flow flowing towards the direction of the air inlet through hole in the negative pressure cavity, the resistance to the water flow is increased, and the water is effectively prevented from leaking outwards from the air inlet through hole.

The present application relates to the technical field of wastewater treatment, and particularly relates to a curtain type air floatation machine for industrial wastewater treatment, characterized by comprising a ring-shaped bin, a gas floatation channel is vertically arranged in the ring-shaped bin, the gas floatation channel is used for conveying wastewater downward, and a plurality of flow guide plates are staggered arranged in the gas floatation channel; the wastewater flowing downward and the bubbles floating upward are guided and treated through the plurality of flow guide plates, so that the bubbles can form a bubble curtain at the edge of each flow guide plate, and thus the wastewater can be subjected to air floatation treatment when passing through each flow guide plate, so that the wastewater is subjected to continuous air floatation impurity removal work, the wastewater purification effect is improved, and meanwhile, the bubbles can be fully utilized when passing through each flow guide plate, so that the air floatation effect is improved.

Provided is a floating oil recovery treatment device that can increase the recovery efficiency of floating oil while suppressing the spread of the oil without directly contacting the floating oil. The floating oil recovery treatment device is configured to have a bubble curtain generating mechanism and an injector device (40), generate a bubble curtain into the water using a self-dispersing gas pipe (30) to non-contactingly capture floating oil, and spray high-speed water toward the floating oil layer by the injector device (40) to recover the oil-water mixed fluid in a state in which the recovery ratio of the floating oil is high.

The invention discloses a suspended sediment diffusion control device for ocean engineering, and relates to the technical field of ocean construction. The device comprises a silt collecting tank, a silt capturing module, a separation and deposition module and an intelligent regulation and control module, a main body of the silt capturing module is a barrel with two open ends, a bubble curtain generator is arranged in the barrel, the side face of the barrel is connected with a rotational flow cavity of the separation and deposition module, the lower portion of the rotational flow cavity communicates with a conical cavity, and the conical cavity is located above the silt collecting tank. The sediment capturing module generates a bubble barrier by using a bubble curtain generator, and quickly captures suspended sediment to the cylinder; the separation and deposition module is used for separating the captured suspended silt by utilizing the centrifugal force of a rotational flow cavity, and collecting the suspended silt into a silt collecting tank through a conical cavity; the control system can flexibly adjust the moving direction of the device according to feedback and quickly respond to tide or ocean current changes, so that the device is located at the optimal sediment intercepting position. The device can effectively control diffusion of suspended sediment and reduce the influence of ocean construction on the ocean environment.

The invention discloses a fish blocking facility testing platform, method and device, a medium and a program product, and belongs to the technical field of automatic testing, and the platform comprises a fish blocking facility module which comprises a bubble curtain module and an electric grid module; the automatic testing module is used for starting at least one fish blocking facility module so as to carry out automatic testing; the data acquisition module is used for acquiring test data in an automatic test process; and the quantitative evaluation module is used for carrying out quantitative evaluation on the fish blocking effect of the opened fish blocking facility module according to the test data. The bubble curtain module and the electric grid module are simultaneously integrated on the fish blocking facility test platform to perform comparison test on the same platform, so that multi-technology synergistic effect research can be realized, the test comprehensiveness of the fish blocking facility is improved, the fish blocking effect of the fish blocking facility is accurately measured, and the use experience of a user is effectively improved.

A water and power generating system is disclosed, comprising at least one renewable energy generator, at least one submerged or floating desalination apparatus configured to be at least partially powered by the renewable energy generator, a controller, a desalinated water output conduit, and an electrical power output. The controller is configured to dynamically adjust the operation of the desalination apparatus in response to variations in available renewable energy and fluctuating demands for desalinated water and electrical power. Also disclosed is a water desalination system comprising a docking platform with a substantially tubular housing, mooring attachments, and ballast for vertical orientation. The docking platform may be connected to multiple floating desalination buoys. The platform may further include electrical and water distribution hubs for interconnection with the buoys and shore-based infrastructure. The desalination buoys may incorporate intake bubble curtain devices and brine dispersal systems to enhance intake quality and manage brine discharge.

The invention provides a fish-sand collaborative filtering experiment device and method for a water turbine, and belongs to the technical field of hydraulic machinery experiments.The fish-sand collaborative filtering experiment device comprises a water turbine model used for simulating the water turbine, a volute of the water turbine model is fixedly welded to a water guide pipe, and the water guide pipe is fixedly welded to the terminal of a water outlet of a fine filtering mechanism; the coarse screening mechanism and the fine filtering mechanism are fixedly connected, the escape channel is formed in the left end of the upstream face of a water inlet of the coarse screening mechanism, the secondary flushing mechanism is fixedly installed above the fine filtering mechanism, the fine filtering mechanism is fixedly installed in an inner limiting groove of the coarse screening mechanism, and the optical fish luring device and the bubble curtain generator are fixedly installed above the escape channel. The optical fish luring device is matched with the bubble curtain generator, and fishes moving on the surface layer are guided to pass through the fish guide gate while sand and stone are intercepted. Sediment interception and fish protection processes can be effectively simulated in a laboratory, key test data are collected, safe and efficient operation of the water turbine is achieved, and ecological damage is reduced.

The present application relates to the technical field of environmental protection equipment, in particular to a kind of domestic waste residual wastewater treatment equipment, including wastewater treatment tower, inlet pipe, overflow pipe, slag discharge channel and exhaust bubble structure, the wastewater treatment tower is vertical, inlet pipe is installed at the top of wastewater treatment tower, overflow pipe is installed at the top of wastewater treatment tower, wastewater enters wastewater treatment tower from inlet pipe and flows downward, then is discharged through overflow pipe;By design, wastewater flows vertically in S shape in wastewater treatment tower, which can conveniently make wastewater pass through bubble curtain formed by the floating bubbles discharged by exhaust bubble structure in horizontal direction multiple times, conveniently make wastewater and bubbles form multiple intersection type air floatation effect, increase the contact time of wastewater and bubbles, improve the adsorption efficiency of bubbles on suspended impurities, and reduce the waste of bubbles.

A system is provided having a bubble curtain comprising a pipe arranged with holes in respective pipe walls. Compressed air applied onto the pipe generates bubbles of the bubble curtain upwelling colder water from below a seawater surface. A position of the pipe below the seawater surface is a function of a defined target temperature of the cooled seawater surface.

The invention relates to a sonar system (20) for detecting a bubble curtain of spatially extended, delimited inhomogeneities (22) in the water (22), comprising an active sonar (28) and a signal processing unit (30). The active sonar (28) is designed to emit a waterborne sound signal (32) and to receive waterborne sound with reflections (34) of the emitted waterborne sound signal (32) and to convert the waterborne sound into a corresponding electrical signal (36). The signal processing unit (30) is designed to form a working signal on the basis of the electrical signal (36), to detect reverberation of the emitted waterborne sound signal in the working signal and, on the basis of one or more properties of the reverberation of the inhomogeneities, to detect the inhomogeneities, to sense reverberation of the emitted waterborne sound signal (32) in the working signal and, on the basis of properties of the reverberation, to detect the bubble curtain (22). The active sonar (28) is preferably arranged on the bow or laterally on the watercraft.

A sonar system (20) for detecting a bubble curtain of spatially extended, bounded inhomogeneities (22) in water (22) is disclosed, comprising an active sonar (28) and a signal processing unit (30). The active sonar (28) is configured to emit an underwater acoustic signal (32) and to receive underwater acoustics with reflections (34) of the emitted underwater acoustic signal (32) and convert them into a corresponding electrical signal (36). The signal processing unit (30) is configured to generate a working signal based on the electrical signal (36), to detect a reverberation of the emitted underwater acoustic signal in the working signal, and, based on one or more properties of the reverberation of the inhomogeneities, to detect the inhomogeneities, to detect a reverberation of the emitted underwater acoustic signal (32) in the working signal, and, based on properties of the reverberation, to detect the bubble curtain (22).The active sonar (28) is preferably located on the bow or on the side of the watercraft.

The invention provides a bubble curtain device based on gas pressure feedback, which comprises a gas distribution pipe with one end of a closed structure, the other end of the gas distribution pipe is connected with a gas pump through a gas delivery pipe, and a plurality of flow control units are mounted on the gas distribution pipe along the length extension direction; the flow control unit comprises a body, a plurality of first hole channels are formed in the body, the first ends of the first hole channels extend to the top end of the body, the second ends of the first hole channels penetrate through the side wall of an inner cavity of the body, an elastic unit is fixedly installed at the top of the inner cavity, and a sliding block installed in the inner cavity in a sliding mode is arranged below the elastic unit. The sliding block is of a cylindrical structure with a cover plate at the top, and a plurality of air guide grooves matched with the first hole channels to work are formed in the side wall of the sliding block. According to the invention, flow deviation caused by pressure fluctuation at different positions on the gas distribution pipe is effectively compensated, so that the flow of gas discharged by each flow control unit is approximately constant.

The present application relates to the technical field of water treatment equipment, in particular to a machine tool cooling water treatment equipment, which comprises a water tank, an air inlet pipe installed at the bottom of the water tank and a rotating drum installed at the lower side inside the water tank, a gas diffusion mechanism is arranged around the rotating drum, the air inlet pipe is communicated with the gas diffusion mechanism, the gas diffusion mechanism can diffuse the air discharged from the air inlet pipe into water and form micro bubbles, the rotating drum rotates in the water tank, a plurality of water outlets are formed on the outer wall of the rotating drum, and a fan plate is arranged on the outer wall of the rotating drum; the impurities in the water are subjected to adsorption air floatation treatment by means of the bubble curtain formed by the bubbles, so that the pneumatic filtering effect of the impurities is realized, the phenomenon of blockage in the traditional filtering mode is avoided, and since the bubbles can also have adsorption effect on the tiny particle impurities, the filtering effect is strong, the treatment effect of the cooling water is improved, and meanwhile, the mode will not affect the flowability of the water, so that the rapid and cyclic utilization of the cooling water is ensured.

The utility model discloses a bubble curtain generating device for blocking shock waves in deepwater blasting. The bubble curtain generating device comprises a gas generating device, a connecting pipe, a gas spraying pipe and a lead weight, the upper end of the connecting pipe is connected with the exhaust port, and the lower end of the connecting pipe is connected with the upper end of the gas spraying pipe; the outer wall of the gas ejector pipe is provided with gas release holes, and the lower end of the gas ejector pipe is connected with a lead weight through a connecting rope. The device has the effects that when a plurality of the device are used, a formed bubble curtain can block shock waves generated by blasting of a deepwater blasting point to a certain extent, and aquatic organisms, ship bodies, other buildings and the like needing to be protected around the blasting point can be protected as much as possible; compared with the prior art that a longer connecting pipe is needed to conduct gas and an air compressor with higher power is needed, the device is low in use cost, the lead weight is arranged to straighten the gas spraying pipe downwards, so that when the device is placed at the preset depth near a deepwater blasting point, the device is good in placement stability and not prone to displacement, and the service life of the device is prolonged. And deep-water blasting shock waves are tightly blocked.

The invention relates to the technical field of underwater ship engineering, in particular to an installation and design method of an underwater bubble generating device based on full coverage of a cabin section, and discloses the installation and design method of the underwater bubble generating device based on full coverage of the cabin section. Comprising the following steps: determining a bubble volume at the end moment of a bubble expansion stage based on a classical two-stage model for generating bubbles in still water; the radius of bubbles generated in the transverse water flow is determined based on the reduction proportion of the bubble volume in the transverse flow and the bubble volume at the end moment of the bubble expansion stage in the still water; the rising speed of the bubbles in the water is determined based on an instantaneous steady-state rising speed model of the large bubbles in the water; the rising time of the bubbles in the water is determined based on the rising speed of the bubbles in the water; establishing a rectangular coordinate system on the ship body based on a space coordinate system to determine an X axis, a Y axis and a Z axis; by utilizing the scattering and absorbing effects of the bubble curtain in water on the sound waves, the propagation energy of the sound waves in water can be greatly attenuated, so that the distance of positioning and tracking the ship by utilizing the sound waves is reduced.

The utility model discloses an underwater bubble curtain generating device which comprises two sets of bubble curtain generating pipes arranged in parallel and two sets of supporting frames arranged in parallel, a plurality of sets of bubble holes are evenly formed in the surfaces of the bubble curtain generating pipes, and the bubble holes are located in the same straight line. The arrangement direction of the bubble curtain generating pipes is the same as that of the supporting frame, the bubble curtain generating pipes are arranged above the supporting frame, and the two sets of bubble curtain generating pipes are symmetrical along the central axis in the arrangement direction. Hose connectors used for being externally connected with hoses are formed in one ends of the two sets of bubble curtain generating pipes, and the bubble curtain generating pipes are connected with an air compressor through the hose connectors and the external hoses in sequence. The spraying direction of the air outlet holes can be changed, bubbles of the double rows of air outlet holes are converged, and the problem that the air outlet amount of a single row of bubble holes is too low due to insufficient supply of an air compressor caused by too long laid pipelines is solved.

The utility model relates to the technical field of water conservancy projects, and discloses an underwater bubble curtain sediment intercepting device which comprises a fixing plate, the top wall of the fixing plate is fixedly connected with an air compressor, a flow meter is fixedly installed on the left side of the bottom of the air compressor, and the bottom end of the flow meter is communicated with a conveying pipe. The rear end of the conveying pipe is fixedly connected with a valve, the rear end of the valve communicates with a connecting pipe, the rear end of the connecting pipe communicates with a connecting shell, the top wall of the connecting shell communicates with a plurality of spraying pipes at equal intervals, the bottom of the connecting shell is fixedly connected with a base, and the left side and the right side of the top of the base are each provided with a limiting assembly. According to the utility model, high-pressure airflow passes through a plurality of spray pipes to output bubbles, so that the bubbles which are continuously released can change a surrounding flow field, vertical circulation is formed on two sides of a bubble curtain by continuous aeration, silt is limited on one side of muddy water under the action of the circulation, and further ship navigation is prevented from being hindered.

The application discloses a facility for assisting anadromous fishes to enter a fishway inlet and a method thereof, relates to the technical field of fish passing facilities, and is a technology for smoothly guiding fishes to enter a fishway inlet in a wide range. The facility for assisting anadromous fishes to enter a fishway inlet comprises a plurality of fan ring units, an air compressor, a control center, fixed piles and a flow regulating unit, the fan ring units are gradually enlarged one by one in a radial manner from the fishway inlet to the downstream of a river, and each fan ring unit is composed of a fan ring, a fish attracting device, a sensor and a bubble curtain device. The bubble curtain device is arranged along the outer side of the fan ring, the air compressor is connected with the bubble curtain device through a pipeline, and the control center is in communication connection with the fish attracting device, the sensor, the bubble curtain device and the air compressor. The application has the advantages of comprehensively attracting fishes by sound and light, is favorable for long-distance discovery of anadromous fishes and smooth arrival of the fishes at the fishway inlet, and has important significance for protecting fish resources and promoting water ecological civilization construction.

The invention provides a pile casing noise reduction device for underwater piling in an ecological sensitive area. The pile casing noise reduction device comprises a double-layer pile casing, a rubber hose, a sound absorbing material and an external air compressor. The rubber hose is spirally coiled on the inner wall of the double-layer pile casing, and the rubber hose is spirally arranged in the axial direction of the double-layer pile casing; the double-layer pile casing comprises an inner-layer pile casing and an outer-layer pile casing, and a gap between the inner-layer pile casing and the outer-layer pile casing is filled with a sound absorbing material; the rubber hose comprises a connecting end, the connecting end extends out of the double-layer pile casing and is connected with the external air compressor, and the rubber hose coiled in the double-layer pile casing is provided with air holes; the external air compressor conveys air to the rubber hose through the connecting end, then the rubber hose generates a bubble curtain through the air holes, and the multiple noise reduction device integrating the bubble curtain and the pile casing structure is provided to solve the problems of bubble drifting, poor bubble stability and low noise reduction efficiency in the prior art.