692 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 dynamic response calculation method of a pure float type photovoltaic array, so as to reduce calculation time and cost. Comprising the following steps: determining a minimum repetitive module of the pure float type photovoltaic array; determining a numerical value equivalent body of the pure float type photovoltaic array, and constructing and simplifying a numerical value equivalent body three-dimensional digital model; according to the working condition and the environment load of the pure float type photovoltaic array and the simplified numerical equivalent three-dimensional digital model, establishing an optimal numerical equivalent simulation model, and calculating a hydrodynamic coefficient and a wind and flow force coefficient of a single optimal numerical equivalent simulation model; connection structures and mechanical parameters between numerical equivalent bodies are determined, and a numerical model under the overall size of the array is established; and performing time domain numerical simulation under a corresponding working condition to obtain a motion response result. According to the method, the concept of the minimum repetition module and the numerical equivalent is introduced, the large pure float type photovoltaic array can be calculated quickly, the calculation efficiency is improved, and the calculation cost is reduced.

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 relates to a vertical axis wind-flow energy power generation platform and an operation method thereof.The vertical axis wind-flow energy power generation platform comprises a platform body, an adjustable gearbox, a vertical axis fan and a vertical axis water turbine, and the platform body comprises a main stand column and a plurality of auxiliary stand columns; the adjustable gearbox is arranged in the main stand column; the vertical shaft fan comprises a fan shaft and a plurality of fan blades; the vertical shaft water turbine comprises a water turbine shaft and a plurality of water turbine blades; a fan shaft is connected with one end of the adjustable gearbox, and a water turbine shaft is connected with the other end of the adjustable gearbox; the transmission ratio gamma is adjusted through the adjustable gearbox, gamma = n wind / n flow, n wind is the rotating speed of the vertical axis fan, and n flow is the rotating speed of the vertical axis water turbine; and the rotating directions of the vertical shaft fan and the vertical shaft water turbine are opposite. Functional coupling of the vertical-axis fan and the vertical-axis water turbine is achieved by adjusting the transmission ratio of the adjustable gearbox, the vertical-axis fan and the vertical-axis water turbine are combined into a whole, and offshore wind energy and tidal current energy can be developed at the same time.

The invention discloses energy-saving high-pressure cleaning equipment for square and rectangular pipes, and relates to the technical field of high-pressure cleaning, the energy-saving high-pressure cleaning equipment comprises a main body frame, a cleaning module is mounted above the main body frame, a rotational flow collaborative cleaning mechanism is arranged in the cleaning module, and the rotational flow collaborative cleaning mechanism is used for changing a water flow mode to ensure internal and external water flow collaborative high-pressure cleaning; the introduced air conveying bin only surrounds the outmost periphery of the nozzle, air flow flows along spiral water flow on the outmost periphery of the nozzle after being discharged in a vertical flowing mode, through the design, the peripheral water flow obtains additional momentum under the action of wind power, and then the momentum is transmitted to the internal water flow through collision among fluid molecules; according to the process, redistribution of energy is achieved, energy of internal water flow is supplemented, and water flow impact force borne by the peripheral square and rectangular pipes and the internal square and rectangular pipes is more balanced through the effect of wind power on the peripheral water flow and transmission of the energy to the internal water flow.

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 an adjustable computer heat dissipation device and a heat dissipation method.The adjustable computer heat dissipation device comprises a computer mainframe box, a heat dissipation module, an adjusting module and a controller, the heat dissipation module is fixedly connected with an installation assembly, the heat dissipation module comprises fan blades and cooling fins, the fan blades are electrically connected with a driving part, and the driving part is connected with the installation assembly; the adjusting module comprises a replacement plate, a heat dissipation cavity is formed in the replacement plate, a plurality of air flow pipelines are installed in the heat dissipation cavity, the outer side walls of the air flow pipelines are sleeved with deformable rings, energy storage cavities are formed between the air flow pipelines and the deformable rings, and through holes are formed in one ends of the air flow pipelines; the controller is in signal connection with a monitoring assembly, and the controller adjusts the power of the driving part according to real-time temperature data monitored by the monitoring assembly. Compared with the prior art, the detachable and adjustable design enables the heat dissipation equipment to easily adapt to computer mainframe boxes of different models and specifications, and the heat dissipation performance can be automatically adjusted according to temperature and wind speed data monitored in real time.

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.

The invention relates to the technical field of air purification, in particular to distributed air purification equipment which comprises a purification settling box, a round air inlet is formed in the front side face of the purification settling box, an axial flow fan is fixedly installed on the outer side of the round air inlet of the purification settling box, and a connecting box is fixedly installed on the rear side face of the purification settling box. A connecting box is fixedly installed at the upper end of the purification settling box, a filter box is fixedly installed at the rear end of the connecting box, a drainage plate is fixedly connected to the upper end of an inner cavity of the purification settling box, and partition plates are fixedly connected to the two ends of the drainage plate in a bilateral symmetry mode. At the moment, air drives impurities to sequentially flow through a purification settling box, a connecting box and a filtering box and finally flow out along an air outlet in the rear side face of the connecting box; and through cooperation of the precipitation purification mechanism and the filtering mechanism, air can be well purified, and the air purification quality is greatly 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.

Systems, devices, and methods for generating a first wind model, wherein the first wind model is based on at least one or more key parameters; generating a second wind model, wherein the second wind model is based on a secondary wind measurement device, from at least one of: a second stationary anemometer, an aerial-based data from an onboard anemometer, a control-system derived wind vector during a flight of an unmanned aerial vehicle, and a third-party meteorological data service; adjusting the second wind model based on a comparison of two or more altitudes; and adjusting the one or more key parameters to achieve a solution convergence, where the solution convergence is achieved when at least one of: a determined error between a received wind data and the second wind model is minimized to within an accepted tolerance range and a number of minimization attempts exceeds a threshold.

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 invention provides a wind flow field simulation method and device for a wind driven generator. The wind flow field simulation method comprises the steps of obtaining fan data of the wind driven generator in a running state and mesoscale meteorological simulation data of a wind power plant where the wind driven generator is located; based on the fan data and the mesoscale meteorological simulation data, the acting force of the wind driven generator on the CFD flow field is calculated to serve as an additional source item of a preset turbulence model, the additional source item can reflect the acting force of the wind flow field acting on an impeller of the wind driven generator in the running state, and the preset turbulence model is used for CFD flow field simulation; cFD flow field simulation data is calculated based on boundary conditions for CFD flow field simulation and a predetermined turbulence model including additional source terms to reflect a wind flow field around the wind turbine, the boundary conditions being determined based on the mesoscale meteorological simulation data. The method achieves the unsteady simulation of the air flow field of a multi-spatial-scale operation fan, and achieves the more real and accurate inversion of the air flow field of the operation fan.

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 invention discloses a low-wind-resistance grading spinning type dust primary purification device, and relates to the technical field of ventilation and dedusting, the low-wind-resistance grading spinning type dust primary purification device comprises a dedusting device body, the upper part of the dedusting device body is provided with an air inlet pipe, the lower part of the air inlet pipe is connected with an air inlet diverging body through a flange, and the air inlet diverging body is connected with a wind flow spinning mechanism; the airflow spinning mechanism is connected with the dust removal device body, a dust grading mechanism is arranged in the dust removal device body, an air collecting and exhausting mechanism is arranged on the lower portion of the dust grading mechanism, and a dust cleaning mechanism is arranged on the lower portion of the air collecting and exhausting mechanism. By adopting the low-wind-resistance grading spinning type primary dust purification device, large-particle dust in dust can be effectively reduced, the dust removal burden of various efficient dust removers is reduced, the working efficiency of the efficient dust removers is improved, the operation cost of ventilation and dust removal is reduced, and meanwhile the device has the advantages of being simple in structure, convenient to install, wide in application range and high in practicability. And the working state is stable.

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 belongs to the technical field of low-voltage coils, and particularly relates to a dry-type transformer low-voltage coil which comprises a first supporting frame, supporting plates are installed in the first supporting frame in an array mode, coil bodies are installed on the supporting plates in a surrounding mode, and a second supporting frame is fixedly installed at the bottoms of the supporting plates. And a flowing groove is formed in the first supporting frame, an air inlet head is fixedly installed on the flowing groove, and a heat dissipation groove is fixedly installed in the supporting plate. The cooling efficiency of the low-voltage coil of the dry-type transformer is improved conveniently through the installed cooling grooves, when the low-voltage coil of the dry-type transformer is cooled, the ventilation assembly conveys wind to flow, the wind flows into the flowing grooves through the air inlet heads, then the wind flows into the cooling grooves, and the cooling efficiency of the low-voltage coil of the dry-type transformer is improved. And when the wind power flows, heat is carried, and after the wind power carrying the heat flows into the collecting groove, the wind power flows to the outside through the exhaust head, so that the heat dissipation efficiency is improved.

The invention provides a prediction method and system for a temperature field in a high-ground-temperature tunnel, and belongs to the technical field of tunnel construction.The prediction method comprises the steps that S1, an initial value of the high-ground-temperature tunnel is obtained; s2, building a surrounding rock tunnel model; s3, the surrounding rock tunnel model is set to be in a non-uniform temperature field, and the initial value of the high-ground-temperature tunnel is substituted into the surrounding rock tunnel model to initialize the model; s4, the air flow temperature is set in the initialization model; setting underground seepage water in the initialized model by adopting a Darcy law so as to form a coupling tunnel model after coupling of the surrounding rock, the underground seepage water and the wind current; and S5, predicting a temperature field in the high-ground-temperature tunnel by using the coupling tunnel model. According to the invention, the coupling of surrounding rock, underground seepage water and wind flow is realized, the temperature field distribution in the high-ground-temperature tunnel is simulated, and the potential risk existing in the high-ground-temperature tunnel construction can be predicted according to the simulated temperature field.

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.