558 results about "Wind flow" patented technology

The invention relates to the technical field of mine mining, and discloses an underground multi-parameter environment monitoring method, which comprises the following steps of: acquiring equipment pose, vibration spectrum and environment parameters in real time through a multi-source sensor, performing space-time alignment, filtering noise reduction and feature extraction on original data, outputting a standardized state vector, and performing data processing on the standardized state vector; fusing the pose data, the vibration signals and the environmental parameters under a unified space-time reference to construct a multi-dimensional feature matrix; and carrying out dimension reduction and redundant information elimination by adopting principal component analysis, and outputting a fused equipment state vector. According to the method, through real-time fusion of the equipment pose and the airflow dynamic state, the ventilation equipment is cooperatively regulated and controlled, the interference of mechanical vibration on the gas monitoring precision is eliminated and the reliability of gas concentration detection is guaranteed based on coupling modeling of vibration spectrum and pose drift and intelligent compensation of sensor reading errors, and through space correlation analysis and dynamic air volume optimization, the gas concentration detection accuracy is improved. Wind speed sudden drop caused by tramcar passing is actively eliminated, and roadway global continuous monitoring is achieved.

The invention discloses a fan blade diagnosis method and system based on voiceprint perception, and relates to the technical field of intelligent monitoring of wind power equipment, and the method comprises the steps: carrying out frequency domain compensation processing, stripping environment wind noise components, and generating a pure voiceprint signal based on a wind flow characteristic parameter set; based on the pure voiceprint signal, identifying a sensitive acoustic frequency band of the fan blade, exciting a sound wave phase synergistic effect in the sensitive acoustic frequency band, and generating an enhanced voiceprint signal; quantifying the internal damage depth of the fan blade material according to the enhanced voiceprint signal, and calculating a sound energy flow disorder degree index; according to the sound energy flow disorder degree index, the blade health state of the fan is judged through a multi-dimensional acoustic characteristic state space mapping mechanism, and a three-dimensional health assessment report is generated; through a physical level wind noise stripping technology, a transfer function matrix is generated based on vortex interference modeling and sound wave-airflow phase offset correction, frequency domain energy reweighted decoupling is realized, and environmental wind noise is accurately stripped in a strong turbulence environment.

The invention belongs to the technical field of gas detection, particularly relates to a harmful gas concentration detection device for environmental monitoring, and solves the problems of insufficient airflow control and insufficient detection precision in the prior art. The spiral air flow guide plate, the servo motor and other structures are arranged, the air flow guide plate is designed to be of a right-handed spiral structure, gas enters the barrel in a laminar flow state through a gradually-shrunk channel of the air flow guide plate, turbulence interference is effectively reduced, and the air flow guide effect is improved. The rotating circular plate drives the sliding straight block to move in the radial direction through the inner spiral limiting block, the organ moving block is driven to form a dynamic sealing cavity, sucked airflow is compressed to a detection area, the collision frequency of target gas molecules and the detection assembly is remarkably improved, and therefore the capturing capacity of the device for trace gas is enhanced.

The invention relates to the technical field of coal mine underground dust prevention and control, in particular to a coal mine dust concentration over-limit spraying and dust-settling device and a control system thereof.The coal mine dust concentration over-limit spraying and dust-settling device comprises a dust sensing array composed of a plurality of dust concentration sensors arranged in a spatially separated mode, a main sensor arranged close to a dust generation source, and a dust concentration sensor arranged close to the dust generation source, the at least two auxiliary sensors are sequentially arranged at a set interval; the wind speed sensing unit is mounted in a preset range of the upwind direction of the main sensor and is used for synchronously capturing real-time wind speed; the partition spraying actuator comprises independent spraying units corresponding to the positions of the sensors, and each unit is provided with a quick-response electromagnetic valve and an atomizing nozzle; the multi-source information fusion controller is connected with the dust sensing array, the wind speed sensing unit and the partition spraying actuator through an industrial field bus; through dynamic threshold setting, dust diffusion path monitoring and prediction interception technologies, the problems of response lag and excessive spraying of a traditional fixed threshold system are solved.

The invention belongs to the technical field of compression resistance detection, and particularly relates to a scientific research file cabinet compression resistance detection device which comprises a frame, a supporting frame is fixedly mounted in the frame, a first telescopic rod is fixedly mounted at the top of the frame, a pressure sensor is arranged at the bottom of a supporting plate, and the pressure sensor is fixedly connected with a pressure applying plate. And an adjusting mechanism used for adjusting the position of the pressing block is arranged in the sliding groove, a limiting mechanism used for limiting the scientific research file cabinet is arranged in the frame, and a storage assembly used for storing chippings is arranged in the frame. According to the device for detecting the compression resistance of the scientific research file cabinet, chippings can be conveniently stored through the fan and the storage box, the detection accuracy is improved, when the surface of the scientific research file cabinet is damaged, the chippings fall into the storage box to be collected, the fan works to generate wind power flowing, the wind power can flow to the top of the scientific research file cabinet, and the scientific research file cabinet is cleaned; impurities adsorbed by the cabinet body are removed and stored, so that the accuracy of compression resistance detection can be ensured.

The utility model discloses an air-to-air heat exchanger and an energy storage converter, a shell of the air-to-air heat exchanger defines an air inlet area, a heat exchange area and an air outlet area which are sequentially arranged in the vertical direction, an air port for internal circulation ventilation corresponds to the heat exchanger area, and an air port for external circulation ventilation corresponds to the air inlet area and the air outlet area. The heat exchange core body is correspondingly arranged in the heat exchange area, so that the outer circulation air channel in the heat exchange core body is arranged in a straight-through mode in the vertical direction, and the situation that dust in outer circulation low protection air flow is accumulated at the corner of the outer circulation air channel of the heat exchange core body after being used for a long time, and consequently the efficiency of the heat exchanger is reduced is avoided. The energy storage converter comprises the air-air heat exchanger. The heat exchange efficiency is high, and the dust accumulation risk of the heat exchanger is reduced.

The invention provides a CFD optimization-based air volume matching and linkage control method and system for a smoke prevention and exhaust system of an underground powerhouse, and belongs to the technical field of underground smoke exhaust systems. The method comprises the following steps: performing physical modeling according to an actual underground powerhouse, and performing grid division, solver selection, boundary condition setting and airflow field change simulation to obtain an initial airflow field; cFD is adopted to simulate temperature changes, smoke concentration changes and airflow changes in different fire scenes, wind flow and smoke flow in the underground powerhouse are analyzed, the defects of an existing system are evaluated, and smoke exhaust pipeline arrangement and fan configuration are optimized according to the defects; the airflow change in the fire environment is dynamically calculated by combining the real-time monitoring system and the CFD, and the air volume of the pressurized air supply system, the smoke exhaust system and the air supplement system is adjusted. Efficient linkage of the system is achieved, while personnel evacuation safety is guaranteed, the smoke exhaust efficiency and the emergency response capacity are improved, energy consumption is reduced, and the dual goals of energy saving and efficiency improvement are achieved.

The invention provides a mining inspection method and system based on ventilation parameter monitoring, and relates to the technical field of data processing. The method comprises the following steps: constructing a mine tunnel three-dimensional model according to mine tunnel structure information, and generating an optimal inspection path based on the mine tunnel three-dimensional model and distribution characteristics of a monitoring area; the inspection robot is controlled to conduct autonomous inspection based on the optimal inspection path, and mine ventilation parameters collected by the inspection robot are received; according to roadway section information acquired by the inspection robot, mine ventilation parameters corresponding to all wind measurement points in the section are determined, a wind flow distribution feature map is generated, and a ventilation abnormal area is recognized based on the feature map; and constructing a ventilation parameter time sequence model corresponding to the preset wind measurement point based on the mine ventilation parameters, performing ventilation parameter prediction by using the time sequence model, and determining a potential risk area according to a prediction result. According to the technical scheme, the accuracy and comprehensiveness of mine ventilation monitoring can be improved.

This invention relates to the field of mining technology and discloses a method for multi-parameter environmental monitoring underground. The method includes the following steps: real-time acquisition of equipment pose, vibration spectrum, and environmental parameters through multi-source sensors; spatiotemporal alignment, filtering and noise reduction, and feature extraction of the raw data; outputting a standardized state vector; fusing pose data, vibration signals, and environmental parameters under a unified spatiotemporal reference to construct a multi-dimensional feature matrix; and using principal component analysis to reduce dimensionality and remove redundant information, outputting the fused equipment state vector. This invention achieves real-time fusion of equipment pose and airflow dynamics, collaboratively controlling ventilation equipment. Based on coupled modeling of vibration spectrum and pose drift, it intelligently compensates for sensor reading errors, eliminates the interference of mechanical vibration on gas monitoring accuracy, and ensures the reliability of gas concentration detection. Through spatial correlation analysis and dynamic airflow optimization, it proactively eliminates sudden drops in wind speed caused by mine car passage, achieving continuous monitoring throughout the roadway.

The invention relates to the technical field of desertification control, and discloses a desert ecological management scheme selection method, device, equipment and medium, the selection method comprises the following steps: constructing a plurality of desert ecological management schemes, and aiming at each desert ecological management scheme, setting different types of sand body barriers in sequence to form a composite sand body barrier; performing sand flow field simulation based on the geographic information of the desert area, and determining an average wind speed without a sand barrier; performing wind-sand flow field simulation on the desert area provided with the composite sand barrier to obtain an average wind speed after the sand barrier is arranged; and determining a wind speed reduction rate based on the average wind speed without the sand barrier and the average wind speed after the sand barrier is arranged, and screening out a target desert ecological management scheme with protection efficiency according to the wind speed reduction rate. According to the technical scheme, a comprehensive treatment scheme can be accurately selected, and wind prevention and sand fixation, soil improvement, plant recovery and efficient utilization of water resources are achieved.

The invention relates to the technical field of new energy resource evaluation, in particular to a wind and light resource dynamic evaluation method and system based on multi-source remote sensing data, and the method comprises the following steps: inputting a region remote sensing image, calculating a boundary confidence coefficient, generating an interference classification identifier, reconstructing a resource prediction output value, predicting a trend analysis result, and evaluating a development suitability level. And generating a regional resource evaluation result. According to the invention, effective quantification of boundary stability and data confidence is realized through cooperative judgment of a remote sensing image boundary structure and reflected light intensity distribution, fine identification of wind flow offset and area shielding is carried out based on a terrain gradient and a wind direction included angle, and wind speed radiation data is accurately interpolated according to a space grid connection combination and a neighborhood change trend. And meanwhile, climate factors and resource change trends are accurately coupled, and actual path connectivity is determined in combination with terrain and land attributes, so that the spatial suitability and development accuracy of wind and light resources are effectively improved.

The invention provides an intelligent blower temperature and wind speed adaptive control method and system, and relates to the field of intelligent control, and the method comprises the steps: collecting temperature, humidity and wind speed, and constructing a local feature map based on feature vectors; a dynamic evaporation thermodynamic model is established according to the local feature map and used for calculating the evaporation rate of each area, and then the energy requirement for achieving the needed drying effect of each area is calculated according to the evaporation rate; a competitive sensing type wind energy mapping model is established to map energy requirements into control signals used for controlling air outlet parameters, namely wind cavity control signals, and regional self-adaptive adjustment of wind temperature and wind speed in space is achieved; actual air flow output collected in real time is compared with an air cavity control signal, and a feedback difference mechanism is constructed to conduct iterative correction on the dynamic evaporation thermodynamic model and the energy requirement; the physical state change in the hair drying process can be perceived in real time, and dynamic balance can be realized by integrating the use habit and comfort perception of the user.

This application relates to the technical field of fully automated water surface robots, and provides a performance unmanned boat, including a hull; a mounting frame fixed to the hull; a screen fixed to the mounting frame and located on the top side of the hull, the screen having a ventilation structure; and a float fixed to the hull and located on the side of the hull. The performance unmanned boat provided by this application uses a screen with a ventilation structure and a float in conjunction with the hull. The ventilation structure reduces the screen's resistance to natural wind flow, reducing the external force exerted on the screen by natural wind. Simultaneously, the float increases the hull's support points on the water surface, enhancing the hull's resistance to wind and waves. This effectively solves the technical problem of unmanned boats carrying large screens easily capsizing when navigating on water, improving the stability of the performance unmanned boat on water, ensuring the smooth completion of performance tasks, and enabling the performance unmanned boat to meet the requirements of cultural and publicity purposes.

The invention relates to the technical field of industrial data processing, in particular to an intelligent safety accident early warning method and system based on risk assessment, and the method comprises the steps: obtaining a mining operation event, extracting response situations before and after the operation event, checking the response situations with a reference response template, and judging a disturbance response according to the deviation degree; a ventilation network model is constructed, and when it is detected that a monitoring point is abnormal, management traceability is carried out along a traversal upstream path in combination with an air volume distribution proportion; predicting the propagation trajectory of the abnormal gas along the wind flow path and the time of reaching a downstream node based on the ventilation network model, and obtaining spatial correlation analysis; analyzing the disturbance response and the spatial correlation, calculating a coupling risk increment, and outputting a comprehensive risk value; judging the critical degree grade of the comprehensive risk value time series data; and determining a scheduling level according to the combination of the comprehensive risk value level and the critical degree level, when the critical index indicates to evolve to a dangerous state, improving the scheduling level in advance, and generating a differentiated resource scheduling suggestion in combination with the propagation trajectory.

The invention belongs to the technical field of rotating wheel dehumidifiers, and discloses a temperature and humidity decoupling heat pump type rotating wheel dehumidifier which comprises a machine body, a plurality of partition plates are fixedly connected to the middle of the machine body, a double-layer rotating wheel shell is rotationally connected between a pair of partition plates, and the rotating directions of the two layers are opposite. Through cooperation of rotating blades, tooth pull rods, guide folding plates and other structures, the pair of rotating blades is opened, silica gel layers are exposed, meanwhile, the guide folding plates rotationally connected to the rotating blades can be folded in a sliding mode, funnel-shaped guiding is formed on the two sides of an air inlet of a semicircular connecting pipe, and during air inlet, the situation that the wind power is insufficient when fresh air penetrates through the silica gel layers is avoided; the conditions that the air outlet efficiency is low and the range of a transition area is increased are avoided, airflow turbulence in the semicircular connecting pipe is reduced, the application flexibility of the device is improved, two silica gel layers in the double-layer rotating wheel shell are arranged to be in a wave shape and a honeycomb shape correspondingly, the double-layer rotating wheel shell rotates in the opposite directions in the working process, fresh air entering the device is disturbed conveniently, and the dehumidification effect is enhanced.

The invention discloses an intelligent control method and system applied to a marine floating target, and the method comprises the steps: collecting target ship information and marine environment data in real time through a multi-mode sensor array, and carrying out the time-space alignment and fusion processing, and obtaining an environment state vector; based on the ship kinematics principle, wind and flow disturbance force is decomposed into resultant force and moment vectors under a ship body coordinate system; evaluating the danger degree of the current navigation environment through the dynamic risk index, carrying out navigation risk intelligent grading, and triggering a grading control strategy; a self-adaptive controller is designed based on the Lyapunov stability theory, anti-interference dynamic adjustment is carried out on the target ship, and track deviation caused by environmental interference is eliminated; when an obstacle or a high-risk sea condition is detected, intelligent obstacle avoidance and path re-planning are carried out, and an optimized path for avoiding the obstacle or a surge area is generated in real time; and calculating the minimum safety distance based on the ship dynamics model, and implementing a graded braking strategy to perform dynamic safety braking on the target ship.

The invention discloses a wind turbine group wake flow control method based on radar wind measurement, and the method comprises the following steps: S1, radar wind measurement: installing laser wind measurement radars on cabins of an upstream wind turbine generator and a downstream wind turbine generator, and enabling the laser wind measurement radars to collect wind direction data in real time; and S2, multi-machine radar data fusion and whole wind flow field reconstruction are carried out, radar wind measurement data of upstream and downstream wind turbine generators are synchronously collected, a three-dimensional wind flow field of a wind direction area of the wind power plant is reconstructed, and the three-dimensional wind flow field outputs whole-field unified wind field indexes as wake flow model input data. The method has the advantage of being good in control effect, and solves the problems that when wake flow of an existing wind turbine group is controlled, self-adaptive adjustment is inconvenient to carry out on upstream and downstream wind turbine units according to radar wind measurement data, so that upstream and downstream fans are lack of cooperation, the wake flow control efficiency is affected, and the power generation benefits of the upstream and downstream fan groups are reduced.

The present invention discloses a mooring stabilization method and device for ship berthing. The method comprises: obtaining external environmental parameters and ship parameters; obtaining relative position information between the ship and the dock, and determining the position of the ship in the wind flow based on the relative position information; determining the desired distance between each mooring pile, the desired distance between the ship and the shore, and the desired length of each cable based on the external environmental parameters, the ship parameters, and the position of the ship in the wind flow; obtaining the ship's roll angular velocity and the ship-turning torque due to environmental factors, and transmitting these to a mooring stabilization device for the mooring stabilization device to assist the ship in mooring. The present invention combines the current external environmental conditions of the ship with its own parameters to determine the desired distance between each mooring pile, the desired distance between the ship and the shore, and the desired length of each cable under different wind flow conditions, thereby accurately controlling the ship's mooring state, ensuring the safety and economic benefits of the ship during mooring, and can be widely used in the fields of ship berthing and ship mooring.

The cold region tunnel anti-freezing system comprises a tunnel body, the two ends of the tunnel body extend outwards to be provided with arched open cut tunnels, the open cut tunnels are erected on the ground, and the open cut tunnels and the ground define a part to form a channel; the at least two groups of exhaust systems are arranged on the open cut tunnel along the trend of the channel at intervals, and the exhaust systems are communicated with the outside of the open cut tunnel and the channel; the monitoring system comprises an out-hole detection module arranged outside the channel and an in-hole detection module arranged at the entrance of the tunnel body; and the main controller is arranged in the tunnel body and is in signal connection with the outside-tunnel detection module, the inside-tunnel detection module and the exhaust system. The open cut tunnel outside the tunnel and the exhaust system are combined together, the exhaust system is installed on the open cut tunnel, when cold air intrudes into the tunnel, the cold air can be exhausted through the exhaust system on the open cut tunnel, the cold air is effectively intercepted, and the risk of freezing injury of the tunnel in the cold region can be remarkably reduced.

The utility model discloses a whirlwind type dust collection system and cleaning robot, the dust collection system includes dust collection mouth, dust collection box, separator and negative pressure generator, its separator can form spiral wind current, utilize centrifugal force to separate garbage from the wind current and collect in the dust collection box, thus can replace the filter screen, reduce use cost.

The invention belongs to the technical field of medical instruments, and particularly relates to a guide wire insertion guiding device for cardiovascular surgery, which comprises a frame, a handle fixedly connected to the side surface of the frame, driving wheels symmetrically arranged on a strip-shaped frame, driven wheels rotationally arranged on the strip-shaped frame in an array manner, and a driving motor arranged in the strip-shaped frame, a driven mechanism is arranged in the strip-shaped frame, a ventilation pipe is fixedly arranged in the driven wheel, a connecting cylinder is movably connected to the bottom end of the ventilation pipe, a communicating pipe is fixedly connected to the bottom of the connecting cylinder, and a flow dividing pipe is arranged in the strip-shaped frame. According to the guide wire insertion guiding device for the cardiovascular surgery, the temperature of a guide wire can be conveniently adjusted by adopting an electric heating block and a driven wheel, the machine works to generate wind flowing, the electric heating block works to heat a shunt tube, and when wind flows in the shunt tube, the driven wheel and the guide wire are heated; the temperature of the guide wire is close to that of a human body, and adaptability of the guide wire insertion guiding device for cardiovascular surgery is improved.

The embodiment of the invention relates to the technical field of wind field simulation, and discloses a tree canopy wind field assessment method based on wind environment simulation, comprising: acquiring a three-dimensional data model of a to-be-assessed target environment; hydrodynamic simulation is executed to simulate wind field distribution when wind flows through the three-dimensional data model, and the tree model of the at least one tree is configured to be a porous medium model in the wind field simulation; obtaining a result based on wind field analog simulation; and determining a risk assessment result for the corresponding tree according to the wind load response index. According to the wind field evaluation method in the embodiment of the invention, at least one wind load response index, such as wind speed, pressure, wind load and the like, related to the corresponding tree is calculated according to a wind field simulation result. The quantified indexes can visually reflect the wind action condition of the tree in the wind field, the mechanical response of the tree in different wind environments can be deeply known, and a specific numerical basis is provided for evaluating the wind resistance of the tree.

The present invention relates to a plain region wind turbine arrangement method based on a Web application system, comprising the following steps: (1) determining a prevailing wind direction; (2) setting parameters; (3) determining the position of a first wind turbine; (4) carrying out quincunx arrangement; and (5) completing the arrangement of wind turbines in the whole region. In the present invention, a computer algorithm and GIS technology are used, so that a large amount of terrain data can be processed and analyzed, and a region with high wind speed and stable wind flow can be rapidly recognized to determine an optimal arrangement position for wind turbine arrangement, thereby significantly improving the efficiency and quality of wind turbine arrangement.

The invention relates to the technical field of wind power generation, in particular to a vertical shaft barrel type wind power generation device. Comprising a generator, an input shaft of the generator is connected with a rotating shaft, a plurality of barrels of hollow structures are arranged outside the rotating shaft in the height direction, a plurality of ventilation holes penetrate through the side walls of the barrels, the barrels are fixed to the rotating shaft, and the rotating shaft is located on the central axis of the barrels; and the generator is connected with the support frame. The ventilation holes are formed in the side wall of the barrel body of the hollow structure, when external air flow acts on the barrel body, air enters the barrel body or flows out of the barrel body through the ventilation holes, so that pressure difference is formed inside and outside the barrel body, rotating driving force is generated, the driving force enables the barrel body to drive the rotating shaft to rotate, and then the generator is driven to output electric energy; the device has the advantages of simple structure, low manufacturing cost, high adaptability and the like; and the designed barrel body structure has a relatively low starting wind speed requirement due to a relatively large wind receiving area and an internal pressure difference mechanism.

The invention discloses an intelligent cooperative control system for mine breathing effect wind pressure adjustment and mining-following wind resistance. Comprising a mine multi-parameter intelligent feedback wind pressure regulation and control method, a roadway top cavity multi-channel wind flow regulation and control mechanism and a mining-following sliding closed wind shielding device. According to dynamic sensing of multi-source environmental parameters, including coal face air flow pressure, overlying goaf static pressure and overflow CO concentration, a breathing effect intensity index HBI is calculated, and based on the HBI and a pressure difference direction, linear mapping is conducted on the target opening degree of an openable and closable tuyere assembly, and a dynamic regulation and control instruction is generated; a regulation and control instruction acts on the roadway top cavity multi-channel airflow regulation and control mechanism, the mechanism integrates a direct flow channel, a Z-shaped airflow channel and a pressurization channel, and intelligent regulation of airflow distribution and ventilation pressure intensity is achieved. The mining-following sliding airtight wind shielding device comprises a sliding guide rail assembly, a reel type folding airtight structure and a double-layer flexible branch bin air bag airtight assembly and synchronously slides along with advancing of the working face, and dynamic airtight and isolation compensation of the goaf is achieved.

The utility model relates to the technical field of fans, in particular to an energy-saving fan with an active heat dissipation function, the energy-saving fan comprises a hood, a motor and a heat dissipation fan, a controller is arranged on one side of the exterior of the hood, four supports are mounted in the hood through bolts, the motor is mounted in the supports, the heat dissipation fan is mounted at one end of the motor, and the heat dissipation fan is mounted at the other end of the motor. The air blowing direction of the heat dissipation fan and the air blowing direction of the fan are elaborately set to be consistent, a strong air flow superimposed effect is formed through synchronous starting, air force generated by the heat dissipation fan directly acts on the motor, the air speed is increased, and the heat dissipation effect is remarkably enhanced. By means of the design, under the same power, the draught fan can provide higher wind power output, meanwhile, the temperature of the motor is more effectively reduced, and the overall performance of the draught fan is improved through the optimal design of the support component.

This invention discloses an intelligent airflow control device and method for combined axial and radial airflow control at a tunneling face. The device includes an axial diameter opening and closing mechanism, an axial horizontal deflection mechanism, a radial air distribution adjustment mechanism, a telescopic and fixed air duct mechanism, and a load-bearing support mechanism. The method includes the following steps: 1. Installing the intelligent airflow control device for combined axial and radial airflow control at the tunneling face; 2. Fully unfolding and hanging the telescopic air duct; 3. Optimizing the flow field distribution through axial and radial airflow distribution; 4. Unloading the telescopic air duct. This invention can adjust the airflow ratio of the axial and radial outlets for different distances from the face and roadway conditions. Based on the tunneling face conditions, it coordinately adjusts the axial airflow angle, the size of the axial outlet, and the size of the radial outlet in real time. Through combined axial and radial adjustment, the airflow at the tunneling face has both axial pushing force and radial diffusion force, thereby optimizing the flow field distribution, improving dust control, and eliminating dust accumulation dead zones.

The application provides a wind guide device and a ventilation system, comprising a base, a lifting rod, an angle adjusting mechanism and a wind guide plate. The base fixes the wind guide device in the air supply channel, the lifting rod is fixedly connected with the base, the angle adjusting mechanism is fixedly connected with the lifting rod, and the wind guide plate is rotationally connected with the angle adjusting mechanism. The lifting rod can adjust the height of the wind guide plate, and the angle adjusting mechanism can adjust the orientation of the wind guide plate. By adjusting the height and orientation of the wind guide plate, the wind guide plate can guide part of the air flow in the air supply channel to the working point located in the pillar construction area, and the part of the air flow will directly impact the dirty air accumulated at the working point, so as to strongly wash and dilute the dirty air. The diluted dirty air will be dispersed away from the working point under the double actions of air flow dispersion and natural diffusion, and finally flow into the air supply channel and be discharged, so that the ventilation effect at the working point is improved, the dirty air accumulation problem is solved, the occupational health and personal safety of the workers are ensured, and the safety hidden danger is eliminated.

Conventional saponius-type wind turbines are large because the generator is connected to the lower part of the turbine's rotating shaft; the goal is to make them more compact. Furthermore, it prevents rainwater, snow, or fallen leaves from accumulating in various parts of the wind turbine. A small, lightweight wind turbine and wind power generation device that can generate stable torque and electromotive force even when wind direction and speed change rapidly, and can utilize wind from all directions, including horizontal, vertical, and oblique directions, to generate rotational torque. [Solution] A vertical-axis wind turbine comprising a bucket having a roughly hemispherical paddle section at the top and a semi-cylindrical bucket section at the body, arranged horizontally offset along the plane of a cylinder cut in half vertically, such that wind flowing into the concave side of one bucket flows into the concave side of the other bucket, and a wind power generation device equipped with a generator inside the bucket.

The utility model discloses a 3D printer wind field structure and 3D printer, the 3D printer wind field structure comprises a molding chamber, the side wall of the molding chamber is respectively provided with an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are both communicated with the molding chamber, the air inlet pipe is internally connected with a plurality of pore plates, the pore plates are provided with a plurality of wind holes, and the wind holes are communicated with the molding chamber. The multiple pore plates are arranged at intervals in the air flow direction, and the air holes in every two adjacent pore plates are formed in a staggered mode. The 3D printer comprises the 3D printer wind field structure. The utility model has the beneficial effects that inert gas airflow can conveniently pass through the air holes on each pore plate after entering the air inlet pipe, and the air holes on the two adjacent pore plates are arranged in a staggered manner, so that the airflow is conveniently homogenized once after passing through the air plate once, the airflow is gradually homogenized, the uneven discharge caused by uneven airflow is prevented, and the discharge quality is improved. Flaws, edge warping, faults and the like are caused on the surface of a printed object.