73 results about "Bernoulli's principle" patented technology

The invention relates to the technical field of numerical control milling machines, and discloses a high-precision numerical control milling machine based on a self-adaptive adjusting system.The high-precision numerical control milling machine comprises a supporting rack, a mounting frame is fixedly connected to one side of the top of the supporting rack, a connecting frame is mounted on the outer side of the mounting frame, and a main shaft is movably connected to a through hole in the top of the connecting frame through a bearing; a driving rotary disc is fixedly connected to the top end of the main shaft, a driving block is fixedly connected to the external eccentric position of the driving rotary disc, and a movable frame is slidably connected to the outer surface of the driving rotary disc. By applying the Bernoulli principle and based on the inherent characteristics of fluid, chip collection and main shaft machining loads are dynamically balanced in the machining process, the machining precision and surface quality are remarkably improved, the chip adhesion rate of the tool and the surface of a workpiece is greatly reduced, and the service life of the tool is remarkably prolonged. By optimizing the airflow distribution of the scrap suction pipeline, the problems of airflow dead angles and reentrainment of dust easily caused by traditional fixed dust removal are effectively avoided.

A flow velocity measuring tube, a main control module, a communication module and a lithium battery are all installed on a sinking frame, the sinking frame sinks into a riverbed and enables the flow velocity measuring tube to be in the water flow direction, and the flow velocity measuring tube is a reducer tube and comprises a first tube part and a second tube part; the pipe diameter of the first pipe part is larger than that of the second pipe part in the water flow direction, pressure sensors are arranged in the circumferential direction of the first pipe part and the circumferential direction of the second pipe part, the lithium battery provides electric energy for the pressure sensors, the main control module and the communication module, and the floating body floats on the water surface and is fixed to the sinking frame through a connecting rope. The communication module and the pressure sensor are connected with the main control module. Based on the Bernoulli principle, high-precision simultaneous measurement of the flow velocity and the water level of the river is realized by adopting a differential pressure measurement mode. The sensor is simple in design structure, clear in principle, free of interference and stable in data.

The invention discloses a speed measuring device for gas vortex flow and a using method thereof. The speed measuring device comprises a pitot tube, a measuring point position control mechanism, a vortex tube and an equipment support. The pitot tube is clamped at the bottom of the measuring point position control mechanism and inserted into the vortex tube, the measuring point position control mechanism is located above the vortex tube and fixed to the top of the equipment support, and the vortex tube is fixed to the bottom of the equipment support. Based on the Seebeck effect and the Bernoulli principle, the speed and direction of gas vortex flow in the vortex tube are measured through a backrest type pitot tube made of two hollow tubes made of different metal materials. According to the invention, the density difference of central and peripheral gases caused by pressure and temperature gradient in vortex flow is considered, and the speed measurement points are continuously and accurately moved through the measurement point position control mechanism, so that the interference of multi-measurement-point arrangement on a flow field is avoided, and the measurement cost is reduced while the measurement precision of the gas vortex flow speed is improved; the application prospect is wide.

The invention provides a downburst maximum horizontal wind speed diagnosis method and system. The method comprises the steps that the vertical speed and the jet radius of downburst vertical jet airflow in a high-voltage transmission corridor area are obtained; constructing a downburst impingement jet model based on the Bernoulli principle, and obtaining a static pressure difference parameter; establishing a momentum equation based on a momentum conservation law and the static pressure difference parameter; a mass conservation equation is established based on the jet radius and the mass conservation law, and the horizontal flow thickness is obtained; obtaining a diagnosis model formula of the maximum horizontal wind speed according to the horizontal flow thickness and the momentum equation; and determining an efficiency coefficient according to the turbulence energy loss, correcting the diagnosis model formula based on the efficiency coefficient, and obtaining a corrected diagnosis formula of the maximum horizontal wind speed, thereby realizing accurate estimation of the downburst maximum horizontal wind speed, and providing key dynamic support for disaster prevention and reduction of power grid facilities.

A large-scale, modular, wind power generating structure and system involving a toroidal or ovoidal shaped wind amplification structure / module that can be stacked vertically to form a tower that passively accelerates a wind flow that moves around each of the modules due to the Bernoulli Principle. Each amplification level includes a plurality of vertical axis wind turbine and generator assemblies, fairings, and vanes that form a synergistic system wherein the efficiency of the vertical axis turbine and generator assemblies and the amount of energy that can be produced per module are substantially improved compared to the turbine assemblies operating outside the integrated and amplified wind system.

The application discloses a kind of pharmaceutical container sorting device and production system, for sorting pharmaceutical container, including the rotating mechanism of symmetrical distribution, rotating mechanism is synchronous rotation or synchronous stop under working condition, rotating mechanism is evenly distributed with the accommodation structure of circumferential along the periphery, container at sorting station is between the accommodation structure of two rotating mechanisms, rotating mechanism is provided with the gas path connecting structure connected to accommodation structure, pharmaceutical container sorting device further includes the gas supply mechanism of being connected with gas source and being arranged close to rotating mechanism, gas supply mechanism is used to provide compressed gas to accommodation structure through gas path connecting structure selectively.This sorting device realizes container sorting based on Bernoulli principle by compressed air blowing, and the pressure of compressed air can reach four to six atmospheres, so the sealing requirement is lower, even if there is air leakage, there is still enough suction to avoid the problem of broken bottle, and slightly air leakage can greatly reduce the processing and assembly difficulty.

The invention relates to the technical field of climate adjusting devices, in particular to a Bernoulli principle climate adjusting device which comprises a base, trusses and an office area are arranged at the top of the base, power generation mechanisms are arranged in the trusses, an iron ball wind damper mechanism is installed between the trusses, and a water spraying mechanism is installed at the top of the base. The power generation mechanism comprises a straight barrel, a stable cross beam is fixedly connected into the inner wall of the straight barrel, and a fan is fixedly connected to the bottom of the stable cross beam. According to the climate adjusting device, by means of the Bernoulli principle, through cooperation of the power generation body mechanism and an iron ball wind resistance device, air flow can be effectively promoted, and peripheral wind power generation equipment is driven to operate; meanwhile, the ground surface temperature is adjusted, heat energy generated by power generation and power utilization is reduced, electric energy is saved, the water spraying mechanism can reduce radiation of sunlight to the ground surface through water spraying, dust can be taken away in the air rising process, and the environment quality is improved.

The invention discloses a heat recovery device of an artificial climate chamber refrigerating system, and relates to the technical field of heat recovery. The heat recovery device of the refrigeration system of the phytotron comprises a refrigeration device, a discharge port is formed in the outer wall of the refrigeration device, and a guide mechanism is fixedly connected to the outer wall of the refrigeration device. According to the heat recovery device for the refrigerating system of the phytotron, by means of the special structural design of the bent pipe and the application of the Bernoulli principle, it is ensured that impurities carried by gas can smoothly flow into the impurity box under the pushing of pulse airflow through the pressure difference formed at the exhaust hole, and in the long-term operation process, even if the gas contains many impurity particles, the impurities can still flow into the impurity box. Impurities such as dust and greasy dirt are removed, deposition of the impurities in the bent pipe and a follow-up heat recovery component is reduced, the problem that an airflow channel is blocked due to impurity accumulation is solved, stable operation of the device is guaranteed, and the equipment maintenance cost and downtime caused by blocking are reduced.

The invention relates to the technical field of chemical synthesis, and discloses an automatic sampling device in a chemical synthesis process, the automatic sampling device comprises a reaction furnace body, the inner side of the reaction furnace body is fixedly provided with two fixed cylinders, the interiors of the fixed cylinders are slidably connected with pistons, the outer sides of the pistons are fixedly connected with movable rods, and the movable rods are fixedly connected with the fixed cylinders. And the outer surface of the fixing barrel sequentially communicates with an air inlet pipe and a conveying pipe, first one-way valves are installed in the conveying pipe and the air inlet pipe correspondingly, and one end of the conveying pipe communicates with a mounting pipe. The sampling mechanism is arranged on the side surface of the reaction furnace, and a driving disc is used for driving a hinge rod to reciprocate, so that a piston reciprocates along the interior of a fixed cylinder, and gas is generated in a conveying pipe. The liquid in the reaction furnace is collected into the collecting bottle according to the Bernoulli principle, so that the sampling efficiency is remarkably improved, the sampling time is shortened, meanwhile, the interference to the internal environment of the reaction furnace is reduced, and the continuity and stability of the reaction process are ensured.

The invention discloses a Bernoulli principle-based 3D uniform temperature plate, which comprises a body, a steam cavity is arranged in the body, the steam cavity is divided into a core area and a non-core area, a communication unit is arranged on the body, a steam channel is arranged in the communication unit, and two ends of the steam channel are respectively communicated with the core area and the non-core area of the steam cavity. One end, corresponding to the core area, of the steam channel is venturi-shaped along the main stream direction of steam. The communicating units are arranged between the adjacent steam channels, a local low-pressure area is generated by utilizing the gradually-shrinking-gradually-expanding cross section during transverse migration of steam, a suction / drainage effect is formed on main stream steam, an effective flowing path is shortened, the total steam pressure drop is remarkably reduced, the total thermal resistance of the 3D uniform-temperature plate can be reduced by 20% or above, the in-plane temperature uniformity is improved, and the service life of the 3D uniform-temperature plate is prolonged. The method is suitable for high-heat-flux scenes such as communication equipment and AI computing terminals.

The invention belongs to the technical field of range hoods, and discloses a novel range hood, which comprises a conical fan pipe, an exhaust fume collecting hood and an oil collecting cavity, and the conical fan pipe comprises a coanda effect, a venturi tube effect and a Bernoulli principle. According to the range hood, airflow separation loss is reduced through the coanda effect, the conical pipe is combined with the double diagonal flow fans, airflow speed and pressure distribution are optimized through the Venturi pipe effect, working points of the serial diagonal flow fans are accurately matched, and compared with a traditional range hood, the range hood has the advantage that the oil smoke adsorption and conveying efficiency is remarkably improved. Oil molecules are efficiently separated through rotational flow of the oil collecting cavity by means of centrifugal force, centralized collection of oil stains is achieved by matching with the design of the oil discharging pipe, and oil-smoke separation efficiency is improved. The connecting assembly achieves stable assembly of the functional modules, the integrity of the system is ensured, convenience is provided for disassembly and cleaning of the diagonal flow fan, the conical pipe and other components, practicability and maintenance convenience are both considered, and actual application and operation are facilitated.

The utility model discloses a pipeline flow velocity control structure convenient to fill, which relates to the technical field of pipeline flow velocity control and comprises a pipeline, a horn mouth is mounted on the bottom wall of the pipeline in a penetrating manner, an anti-slip connector is mounted at the bottom end of the horn mouth, a valve component is mounted at one end of the pipeline, and a valve is mounted at the other end of the pipeline. The valve assembly comprises a guide pipe installed at one end of the pipeline through a bolt, a rotating shaft is installed on the inner side of the guide pipe, a control motor is installed at the top of the guide pipe, and the output end of the control motor is connected with the top end of the rotating shaft. The trumpet-shaped nozzles are installed at the bottom of the pipeline, the trumpet-shaped nozzles are large in upper portion and small in lower portion, fluid is guided to move, according to the Bernoulli principle, due to the fact that the trumpet-shaped nozzles are large in upper portion and small in lower portion, the flow speed of the upper portion is low, but the flow speed of the fluid is increased after the fluid enters the small-diameter portion. Therefore, the fluid can be quickly output and filled.

The invention relates to a system consisting of two reservoirs with cuboid structures, a water pump integrated with a temperature control function and a plurality of pipelines. A height-adjustable cylindrical overflow pipeline is arranged in the center of the bottom face of the reservoir, a water inlet and a water pipe channel are arranged at the position, close to the bottom, of the side face of the reservoir, and different calibers can be switched to meet different flow speed adjusting requirements. And the water pipe channel of the upstream reservoir is connected with a water pump integrated with temperature control, and is connected with the downstream reservoir after passing through the cooling module. The device has the technical effects that in the operation process, the liquid level height is controlled by adjusting the overflow pipelines of the upstream and downstream reservoirs, so that the liquid flow rate during operation of the device is determined. And the pressure intensity at the module can be influenced by adjusting the liquid level height difference. According to the Bernoulli principle, it is ensured that the static pressure and the flow speed at the modules can be independently adjusted.

The present invention relates to the technical field related to ventilation systems, and discloses a marine silencer ventilation duct, which separates the suspended ventilation duct from a hull fastener by the principle of magnetic suspension, thereby cutting off the transmission path of vibration. Meanwhile, adjacent suspended ventilation ducts are also separated by magnetic force, so that there is no direct contact between adjacent suspended ventilation ducts, thereby cutting off the transmission path of vibration along the suspended ventilation duct, thereby reducing the noise generated by vibration. In addition, adjacent suspended ventilation ducts are also one-way sealed by a one-way sealing ring, so that the air flow inside the suspended ventilation duct will not leak out of the duct. Meanwhile, the setting of the conical plate utilizes the Bernoulli principle, and generates negative pressure on the inner side of the gap between adjacent suspended ventilation ducts. The negative pressure is utilized to suck external air into the suspended ventilation duct, thereby cleverly realizing the interaction of air inside and outside the duct, thereby enhancing the ventilation capacity of the ventilation system.

The application belongs to the technical field of semiconductor and discloses a multifunctional semiconductor cavity type processing equipment, which comprises a bearing mechanism, the bearing mechanism comprises a shell, opposite sides of the shell are fixedly connected with communication ports penetrating through the side walls, a first venturi, a second venturi and a third venturi are fixedly connected in sequence from left to right between the two communication ports, and the throats of the first venturi, the second venturi and the third venturi are fixedly connected with vertical pipelines in communication with the interiors thereof. In the application, when a liquid pump drives the liquid in the first venturi, the second venturi and the third venturi to flow, according to Bernoulli's principle, the liquid levels in the three vertical pipelines will drop by different heights, at this time, the center disc, the first supporting ring and the second supporting ring are arranged in an ascending ladder shape from inside to outside, at this time, wafers of different sizes will fall into supporting areas of different heights, so that the wafers of different sizes are stably supported.

The present invention discloses a velocity measurement device for gas vortex flow and a method of using the device, including a pitot tube, a measuring point position control mechanism, a vortex tube and an equipment bracket. The pitot tube is clamped at the bottom of the measuring point position control mechanism and inserted into the vortex tube, the measuring point position control mechanism is located above the vortex tube and fixed at the top of the equipment bracket, and the vortex tube is fixed at the bottom of the equipment bracket. Based on the Seebeck effect and the Bernoulli principle, a back-type pitot tube made of two hollow tubes of different metal materials is used to measure the velocity magnitude and direction of the gas vortex flow in the vortex tube. The present invention takes into account the difference in gas density between the center and the periphery caused by the pressure and temperature gradient in the vortex flow, and uses the measuring point position control mechanism to continuously and accurately move the velocity measurement point to avoid the interference of multiple measuring points on the flow field, thereby reducing the test cost while improving the measurement accuracy of the gas vortex flow velocity, and has broad application prospects.

To provide a substrate processing device capable of efficiently processing a substrate.SOLUTION: Fixing pins 33 support a substrate W at a position higher than a top surface 32a of a plate 32. Air outlets 34 blow out air upward from the top surface 32a of the plate 32. A blowout adjustment part 40 adjusts the flow rate of the air blown out by the air outlets 34. Thus, attraction force corresponding to the Bernoulli's principle acts on the substrate W supported by the fixing pins 33. Tactile sensors 33c detect force N received from the substrate W when the attraction force corresponding to the Bernoulli's principle acts on the substrate W supported by the fixing pins 33. A control part 18 changes the flow rate of the air blown out by the air outlets 34 on the basis of information of the force N received from the substrate W detected by the tactile sensors 33c.SELECTED DRAWING: Figure 5

The utility model discloses a high-pressure jet vacuum valve which comprises a valve body and an afflux pipe, the valve body is provided with a liquid inlet section, a communication chamber, a jet section and a liquid outlet section which are communicated in sequence, liquid is input from the liquid inlet section and enters a liquid inlet pipe, and due to the fact that the inner diameter of the liquid inlet pipe is reduced, the liquid is jetted out from the liquid inlet pipe at a high speed and enters the jet section. Local vacuum is formed in the communicating chamber, so that the liquid in the converging pipe is sucked under the action of negative pressure, and the mixed liquid is output from the liquid outlet section. The utility model further provides a metal working fluid circulating system, which utilizes the high-pressure jet vacuum valve, adopts the Bernoulli principle, conveys the metal working fluid to purification equipment, sucks away the metal working fluid at a cutter of the machining equipment, improves the circulating efficiency of the metal working fluid, and saves energy consumption at the same time. The utility model further provides a metal working fluid circulating system comprising the high-pressure jet vacuum valve.

The utility model relates to the technical field of gas flow meters, and discloses a fluid flow measuring device which comprises a differential pressure sensor mounting base, a differential pressure sensor packaging block is mounted at the top of the differential pressure sensor mounting base, and two first fluororubber sealing rings are mounted in the differential pressure sensor mounting base. The top of the differential pressure sensor packaging block is provided with a differential pressure sensor mainboard, the top of the differential pressure sensor mainboard is provided with four cross recess flat head screws, and the interior of the differential pressure sensor packaging block is provided with a second fluororubber sealing ring. According to the fluid flow measuring device, the pressure difference flow sensor is based on the Bernoulli principle and the continuity equation, when fluid flows through a throttling device (such as a pore plate and a Venturi tube), the flow speed can change due to the change of the cross section area, so that the pressure difference is generated, and the pressure difference and the flow speed of the fluid form a curve; and the flow of the fluid can be calculated by measuring the pressure difference.

The utility model relates to a wafer suction cup based on the Bernoulli principle, and belongs to the technical field of wafer production equipment. In the wafer suction cup based on the Bernoulli principle, the annular groove of the rotating disc and the annular sealing ring on the framework form an annular air channel together, and air flows out from the air channel, passes through the middle ventilation column, the ventilation pipe and the annular groove and flows out from the air spraying opening. A middle ventilation column, a ventilation pipe, an annular groove and an air spraying opening can guarantee that the cross sectional areas of the air channels are consistent only by guaranteeing the machining precision, and the pressure of air sprayed out of the whole rotating disc is consistent. Gas is limited in the components, so that liquid can be prevented from being sucked back to corrode other components. Meanwhile, the middle ventilation column, the ventilation pipe and the annular groove are of a flat structure, and the overall height of the suction cup is reduced. Moreover, the framework is arranged to fix the annular sealing ring and the breather pipe in a matched mode, so that overall assembly is convenient, and component position positioning is accurate.

The teaching toy based on the Bernoulli principle comprises a handle, a motor, a power source, a wing wheel and an annular sheet, the motor and the power source are respectively arranged in the handle, the motor is powered by the power source, a power switch is installed on the handle, the output end of the motor is connected with the wing wheel, and a plurality of flow guide grooves are formed in the surface of the wing wheel. The inner diameter of the annular sheet is larger than the outer diameter of the middle of the wing wheel, after the motor is started, the wing wheel drives surrounding air to flow, the air pressure intensity of the periphery of the middle of the wing wheel is minimum, and the annular sheet is suspended on the outer side of the middle of the wing wheel and rotates around the middle of the wing wheel. The teaching toy based on the Bernoulli principle integrates interestingness, scientificity, intuition and heuristic into a whole, the Bernoulli principle can be visually displayed, and students can complete demonstration operation by themselves and feel the Bernoulli principle by themselves.

The invention relates to the technical field of control quality detection, and discloses an air quality detection alarm method and device.The detection alarm device comprises a fixed bottom plate, two mechanical gas collection assemblies, a gas collection module, a gas collection module and a control module, and an air quality sensor is installed in the middle of the top of the fixed bottom plate; the two mechanical gas collection assemblies are oppositely installed on the two sides of the top of the fixed bottom plate. According to the air quality detection and alarm method and device, through the Bernoulli principle and under the linkage effect of a pressing plate structure, a rotating plate is made to be in a reciprocating rotating state, so that the air bag is stretched and compressed, airflow is made to continuously enter and exit from the interior of the air bag, the latest airflow is intercepted to enter the interior of the air bag, and the air quality detection and alarm effect is improved. The timeliness of intercepting the airflow is guaranteed, an inlet and an outlet of the opening and closing structure are blocked through the end socket assembly after the airflow is intercepted, meanwhile, the channel is automatically blocked through the stop block, and interception of abnormal gas is achieved.

The utility model belongs to the field of teaching experiment equipment, and particularly relates to a fluid measurement experiment device. Comprising an induced draft fan used for driving air to flow so that the air can obtain the flowing speed; the frequency converter is used for changing the rotating speed of the induced draft fan and further changing the air flowing speed, namely air speed; the ventilation pipeline is used for providing a specified path for flowing air, the two different ventilation pipelines are applied, and the variable-diameter pipeline can obtain different flow speeds under the same flow through measurement according to different circulation sections; and the other pipe is a transparent square pipe, so that students can measure and calculate the wind speed and the flow according to the Bernoulli principle. The pitot tube measurement system is used for being inserted into the ventilation pipeline for parameter measurement, and the reference measurement mechanism is used for verifying measurement data.

The utility model discloses a double-air-port bending type bladeless fan. The fan comprises a base, a main body table, an air inlet, an electric wire, a brushless electric fan, an integrated air channel and other main parts. After being accelerated by the brushless electric fan, airflow enters the streamline air channel and is exhausted through the two air outlets. Due to the contraction design of the streamline flow guide plate and the air channel, different flow speeds are formed when air flow passes through the two air outlets, and therefore the fitting degree of the air flow and an air channel frame is enhanced through the Bernoulli principle and the Coanda principle, air flow disturbance is reduced, and the stability of wind power output is improved. The fan adopts the bladeless design, noise is effectively reduced, potential safety hazards are eliminated, meanwhile, the fan is attractive in appearance due to the integrated air channel design, and the fan is suitable for families, offices and other places and has the high mute effect and safety.

The invention provides an underwater vehicle docking device and docking method, and belongs to the field of underwater equipment.The underwater vehicle docking device comprises a base, a barrel, a locking piece and a liquid medium conveying assembly; a barrel and a liquid medium conveying assembly are arranged on the base; a liquid spraying flat opening is formed in the inner wall of the cylinder body, the liquid spraying flat opening is axially arranged around the cylinder body, the liquid spraying flat opening sprays annular liquid flow in the axial direction of the cylinder body, and the underwater vehicle is guided to enter the cylinder body through the annular liquid flow; the locking piece is used for locking the underwater vehicle entering the cylinder body; the liquid medium conveying assembly is used for conveying water into the barrel wall of the barrel. By utilizing the Coanda effect and the Bernoulli principle, annular liquid flow is jetted through the barrel structure, and a stable flow field can be formed in the barrel and in the surrounding environment under the action of the annular liquid flow, so that the underwater vehicle is not interfered by a disordered flow field in a water body environment when being close to the barrel for butt joint; and under the guide of the annular liquid flow, the liquid enters the cylinder body without deviation and collision.

The present invention provides a gas relay based on flow rate tripping. When a serious fault occurs in a transformer, the transformer oil surges. Since the arc length of the arc-shaped shell is greater than the straight-line length of the elastic wave plate, the oil flow velocity on the upper surface of the flow rate switch structure is greater than the oil flow velocity on its lower surface. According to Bernoulli's principle, the oil flow pressure on the upper surface of the flow rate switch structure is less than the oil flow pressure on its lower surface. The oil flow pressure difference between the upper and lower surfaces of the flow rate switch structure causes the elastic wave plate to deform upward, driving the linear displacement component to move upward to trigger the alarm switch action, sending a trip signal, and shutting down the transformer. The flow rate switch structure does not rely on the preload force of a spring or a magnet, but directly drives the elastic wave plate to deform through the oil flow pressure difference, thereby driving the linear displacement component to move upward to trigger the alarm switch action, avoiding the problem caused by preload force drift, and improving the measurement accuracy and reliability of the gas relay in heavy gas signals.

A wind turbine of a multi-ply panel of cylindrical shape has an inclined fixed channel (1) made of reinforced concrete and in the form of a straight line or a curve, which functions like a funnel and is built in a panel (8) (Fig. II). A vertical shaft (5) (Figure I) of the sheet (3) (Figure III) is located above the bearing (6) (Figure 2) and extends to the top panel. The plates and the pieces on the shaft (figure III) of each layer should be fixed (figure III) by means of a mesh (4) with a hollow section. Depending on the study, the piece is in a semi-circular or other semi-elliptical shape and is parallel to the shaft. Advantages-disadvantages: i. A stable construction made of reinforced concrete; ii, the wind speed is increased according to the Bernoulli principle; iii. Utilizing a low speed and a high speed; iv. Creating an artificial tornado inside the wind turbine; v, the construction is simple, and high-tech is not needed; and vi, the system can run in any wind direction. And no disadvantage exists.

The invention discloses a flow guide type pile foundation scouring protection method and device, and relates to the field of ocean engineering and hydraulic engineering. Comprising the following steps: S1, analyzing a flow field to obtain hydrological characteristic data of a sea area; s2, according to hydrological characteristic data, carrying out preliminary design on the key set size of the protection device; the structure comprises a main flow guide plate and a lateral flow guide plate, a flow guide protection device designed according to the Bernoulli principle is utilized, destructive descending water flow is converted into constructive sediment conveying water flow through multi-stage flow field regulation and control, and sediment is induced to deposit in a specific area around a pile while scouring is weakened. The flow separation phenomenon caused by pressure gradient sudden change when water flow flows through the surface of the main flow guide plate can be effectively avoided, the sand-containing water flow can be guided to stably enter and flow out of a protection area, and the conveying direction of sand can be better controlled.

The invention provides a wind speed measuring device, which relates to the technical field of wind speed measurement, and comprises a mounting seat, a stand column is fixedly mounted on the mounting seat, a wind indicator is rotatably mounted on the stand column, the stand column is perpendicular to the wind indicator, an air inlet barrel is fixedly mounted on the wind indicator, the air inlet barrel is parallel to the wind indicator, and a narrow barrel section is fixedly mounted in the air inlet barrel. A vertical pipe is fixedly installed on the air inlet barrel, the bottom end of the vertical pipe penetrates through the air inlet barrel to be communicated with the middle section of the narrow barrel section, and an air speed measuring mechanism is installed in the vertical pipe. According to the wind speed measuring device, through the arrangement of the mounting base, the stand column, the wind indicator, the air inlet barrel, the narrow barrel section, the vertical pipe, the wind speed measuring mechanism and the rainproof structure, the wind speed can be detected through the Bernoulli principle, when wind blows into the vertical pipe and the narrow barrel section, the difference between the air pressure in the narrow barrel section and the air pressure at the top end of the vertical pipe is changed, the wind speed is accurately measured, and the measurement accuracy is improved. In the testing process, rainwater enters the air inlet barrel and can be blown out by wind, and interference of the rainwater on the measuring result is reduced.