3684 results about "Dust fall" patented technology

The invention relates to a method, device and equipment for controlling energy conservation of a clean room with an AI algorithm, and the method comprises the steps: collecting real-time environment parameters and equipment power consumption data through a temperature and humidity sensor, a cleanliness monitor, a dust falling particle catcher and an intelligent electric meter which are disposed in the clean room; associating the real-time environment parameters and the equipment electricity consumption data with production scheduling information to generate a dynamic regulation and control strategy; based on the real-time environment parameters, the equipment electricity consumption data, the dynamic regulation and control strategy and historical energy consumption data, a start-stop strategy of the fan filter unit is calculated through a deep learning model, and the start-stop strategy comprises a three-gear hierarchical regulation and control strategy for an alternating current type FFU. And the voltage and the rotating speed of the fan FFU are dynamically adjusted according to the direct current type FFU, so that intelligent linkage of production requirements and environment control is achieved, and the purposes of reducing cost and increasing efficiency are achieved.

The invention discloses an efficient thin seam coaling roller for a coal mining machine and a using method, and relates to the field of coal mining equipment. A thin seam efficient coaling roller for a coal mining machine comprises a coal mining spiral roller which is fixedly installed at the power output end of a driving rocker arm of the coal mining machine through a fixing bolt; the mounting cover is fixedly mounted at the position, close to the coal mining spiral drum, of the coal mining machine driving rocker arm; while the coal mining spiral drum rotates to mine coal, water spraying at the rocker arm of the coal mining machine, water spraying at the cutting tooth seat and mist curtains sprayed by the wide-angle fan-shaped atomizing nozzles work cooperatively, the dust falling effect is enhanced, a water mist cover is rapidly formed under the assistance of the mounting cover, and the water mist cover can effectively isolate coal dust inside, so that the dust falling effect is improved. And the coal dust diffusion is greatly reduced, the body health of miners is guaranteed, the occupational health risk is reduced, the abrasion of the coal dust to equipment is reduced, the service life of the equipment is prolonged, the maintenance frequency and cost of the equipment are reduced, and the comprehensive benefits of coal mining operation are improved.

The invention discloses a construction site dust fall and pollution prevention and control method and system based on multi-modal perception, and relates to the technical field of construction management, and the method comprises the steps: collecting PM data at a boundary in real time through a boundary monitoring device preset at the boundary of a construction site, and meanwhile, using an unmanned plane carrying the monitoring device to monitor the PM data at the boundary; performing flight monitoring on the interior of the construction site according to a preset route, and collecting PM data of different areas of the site; performing preliminary analysis on the multi-modal sensing data in real time by using an edge calculation module, and identifying dust abnormal conditions; and the data processing center analyzes a current pollution scene of the construction site, matches an optimal dust falling strategy for the current pollution scene, controls surrounding dust falling equipment to perform dust falling operation, constructs a self-organizing communication network among the dust falling equipment, and adjusts a dust falling operation plan by using dust falling feedback information. According to the invention, real-time data collected by the boundary monitoring equipment and the unmanned aerial vehicle are fused, and environment parameters and construction working conditions are combined, so that precise regulation and control of the dust falling equipment are realized.

The invention provides automatic dust suppressant spraying equipment for building interior construction, and belongs to the field of environmental protection treatment. Comprising a fixing plate, a connecting plate is arranged at the front end of the fixing plate, a round block is arranged at the front end of the connecting plate, a spray head is fixedly connected to the front end of the round block, a hose is fixedly connected to the outer surface of the round block, and a position reciprocating assembly used for reciprocating the position of the spray head is arranged on the fixing plate. The position reciprocating assembly enables the nozzle to perform left-right reciprocating motion for spraying, the angle reciprocating assembly is synchronously started to perform up-down reciprocating motion on the angle of the nozzle, so that the dust suppressant can cover a higher area and a lower area, and the position reciprocating assembly is matched to realize omnibearing coverage of a target area; the dust suppressant can be evenly sprayed to all corners, the wind power is monitored through the monitoring assembly, the device can conveniently carry out dust falling treatment on dust in the air in time, and therefore the dust suppression effect is improved.

The invention discloses a BIM-based bridge high pier construction safety monitoring method and system, and relates to the technical field of BIM, a dust concentration prediction vector P is calculated through an environment feature set T, high-precision prediction of dust diffusion concentration is realized, and the dust distribution condition of a construction site is more prospective. Then, according to the scheme, the dust fall parameter set D is formulated in combination with the dynamic change of the dust concentration, the dynamic dust fall strategy is executed, the spraying scheme can be adjusted according to the real-time environment, the dust fall efficiency is effectively improved, and the problems of water resource waste and uneven coverage existing in a traditional spraying mode are solved. Besides, through a feedback mechanism of a dust concentration error D, an environment safety index ZS is calculated and compared with a preset construction area trigger threshold ST, iterative optimization of a dust fall parameter set D is achieved, it is ensured that the construction environment is always in a controllable range, and potential safety hazards caused by excessive dust are avoided.

The utility model belongs to the field of meteorological chromatographic instruments, and particularly relates to a drying and filtering device of a meteorological chromatographic instrument, which comprises a bottom plate, two sides of the top of the bottom plate are respectively and fixedly connected with a collecting box and an instrument body, the top of the inner cavity of the collecting box is fixedly connected with a sealing assembly, and the top of the collecting box is communicated with a filtering box; by arranging the cleaning mechanism, after a motor in the cleaning mechanism is started, a brush plate can be driven to move up and down in a reciprocating mode through cooperation of a mechanical structure to clean the surface of the filter plate, the surface of the filter plate is prevented from being blocked by dust, the gas flowing efficiency is improved, and meanwhile when the brush plate moves to the lowermost portion, a pressing rod can be driven to extrude a sealing assembly; according to the gas chromatograph, the sealing assembly is removed from the communicating position of the filtering box and the collecting box, so that the cleaned dust falls into the collecting box, the manual cleaning process is omitted, the dust can be conveniently collected, and the problems that in the prior art, a gas chromatograph cannot be rapidly cleaned, and impurities are inconvenient to discharge are solved.

The invention relates to the technical field of tunnel ventilation and environmental protection, in particular to an efficient and energy-saving tunnel ventilation and dust removal integrated system. Data analysis and decision making; ventilation control; dust removal operation; and sewage treatment. The intelligent sensing module is installed in the tunnel, environment parameters of different positions can be accurately obtained in real time and transmitted to the central control system, the efficient and energy-saving draught fan is selected, the frequency conversion and speed regulation device is installed, energy consumption is reduced, and by arranging the air filtering device and the dust falling device, the dust falling efficiency is improved. The dust collection device and the dust blocking device arranged at the tunnel portal effectively control the air environment quality in the tunnel, sewage purification and cyclic utilization are achieved through sewage treatment, and the system is high in intelligent degree, can be flexibly adjusted according to the actual situation and is suitable for popularization and application. The problems that a traditional ventilation and dust removal mode is high in energy consumption, poor in effect, lack of intelligent control and the like are effectively solved, the health of constructors is guaranteed, and pollution to the surrounding environment is reduced.

An aluminum ash pickling device, which relates to the technical field of pickling devices, and comprises a pickling tower (1); and a filtering mechanism comprises a filter screen (8), a rotating shaft (9), a cleaning brush (10) and a rotating disc (11). By means of the filter screen (8), when an induced draft fan (4) drives waste gas to an air intake pipe (2), the waste gas is filtered by the filter screen (8) before entering the pickling tower (1); and under the action of the induced draft fan (4), wind power generated by the waste gas pushes the rotating disc (11) to drive the rotating shaft (9) to rotate, the rotating shaft (9) drives the cleaning brush (10) to rotate, the cleaning brush (10) agitates dust on a surface of the filter screen (8) during rotation, and at this point, the dust is loosened and comes off the surface of the filter screen (8), thus reducing the probability of the filter screen (8) being blocked, and preventing the circulation of the waste gas from being affected. When the wind power is small, the dust falls downward into a collecting box (12), a rotating cover (14) is rotated to release the connection between the rotating cover (14) and an external thread (13), and at this point, the dust accumulated in the collecting box (12) flows downward, such that a worker can collect the dust, thus preventing a small amount of aluminum ash from entering the pickling tower (1) along with the induced draft fan (4) and mixing with an agent which would otherwise impair the treatment efficiency of ammonia gas.

The invention relates to the technical field of construction site dust fall, in particular to a BIM cooperative construction site dust fall spraying device dynamic optimization and construction application system which comprises an environment sensing module, a spraying decision module, an execution regulation and control module and an abnormal response module. The system collects environment parameters through a sensor network to generate a dynamic environment portrait, optimizes a spraying coverage scheme in combination with a BIM model, monitors and adjusts the spraying effect in real time through a closed-loop regulation and control mechanism, and detects abnormal accumulation points to generate a strengthening instruction. According to the invention, precision, dynamic and energy-saving dust fall of the construction site can be realized, the construction environment quality is improved, and the resource consumption is reduced.

The invention relates to the technical field of constructional engineering, in particular to a tunnel construction safety monitoring and automatic spraying dust fall method, which comprises the following steps: acquiring sensing data of a construction area, the sensing data at least comprising dust concentration data, humidity data and airflow data at each detection position; according to the dust concentration data, determining a high dust concentration area and predicted dust concentration data of the high dust concentration area at a future moment; according to the dust concentration data, the predicted dust concentration data, the current position of a spraying device and the position of the high-dust-concentration area, the humidity data and the airflow data are combined, and spraying control logic is determined; according to the spraying control logic, a spraying device is controlled to spray water to the high-dust-concentration area for dust falling. By monitoring the sensing data of the construction area and processing the sensing data to determine the appropriate spraying control logic, the dust falling effect is effectively improved.

The invention provides a road and bridge pavement construction device, and relates to the technical field of pavement polishing, the road and bridge pavement construction device comprises a mobile vehicle and two polishing mechanisms, the polishing mechanisms are slidably connected to the mobile vehicle, the two polishing mechanisms are symmetrically arranged on the mobile vehicle, and the two polishing mechanisms are connected through a distance adjusting mechanism; a gear type reciprocating mechanism, a piston type water spraying mechanism and a dust collection mechanism are arranged on the moving vehicle, the gear type reciprocating mechanism is in sliding connection with the moving vehicle and connected with the two polishing mechanisms through belt wheel mechanisms, the piston type water spraying mechanism is fixedly connected with the gear type reciprocating mechanism, and the dust collection mechanism communicates with the piston type water spraying mechanism. The gear type reciprocating mechanism drives the grinding mechanisms, the piston type water spraying mechanism and the dust suction mechanism to operate, the distance between the two grinding mechanisms can be conveniently adjusted through the distance adjusting mechanism, atomized water is sprayed out through the piston type water spraying mechanism, dust falling is conducted on dust, and the dust, without dust falling, of the atomized water is sucked through the dust suction mechanism.

The invention discloses a laser welding tool for automatic machining of an electronic throttle valve, and relates to the technical field of laser welding tools, the laser welding tool comprises a fixed bottom plate, the top end of the fixed bottom plate is provided with an ash falling opening, the middle position of the top end of the fixed bottom plate is provided with a mounting frame, and the front end and the rear end of the top of the fixed bottom plate are both provided with threaded rods; a fan is installed in the middle of the bottom end of the installation frame, and an adjusting mechanism used for adjusting the blowing angle of the fan is arranged on the side of the installation frame. According to the laser welding tool for automatic machining of the electronic throttle valve, a movable block can synchronously drive a movable plate to move when moving, and the movable plate can push a workpiece to the middle position when moving, so that the workpiece to be machined is finally located in the middle position of the top end of a fixed bottom plate; and meanwhile, the clamping plates arranged on the inner sides of the moving plates can buffer and clamp the workpieces through elasticity, so that the workpieces have movement allowance when being clamped, and the surfaces of the workpieces are prevented from being damaged.

The invention relates to the technical field of highway engineering, and discloses an environment-friendly dust falling device for highway engineering construction, which comprises a vehicle body, a box body is fixedly connected to the top of the vehicle body, a lifting plate is arranged above the box body, and a dust falling mechanism is arranged on the box body. The dust falling mechanism comprises a water tank, a submersible pump, a folding pipe, a hollow pipe, a first motor, a connecting pipe, a three-way pipe and an atomizing nozzle, the water tank is fixedly connected to the top of the inner wall of the box body, and the submersible pump is arranged at the bottom of the inner wall of the water tank. An electromagnet can be driven to move according to the wind direction of a construction site by arranging a wind indicator, an atomizing nozzle can be driven to rotate according to the wind direction of the site by arranging a first motor, a hollow pipe, a rotating disc, a clamping base, the electromagnet, a spring and a magnet block, the atomizing nozzle is opposite to the wind direction, and therefore water mist sprayed by the atomizing nozzle can make better contact with dust; therefore, the dust falling effect of the construction site is improved.

The invention discloses an intelligent dust fall device for a building construction site, and belongs to the technical field of dust removal equipment.The intelligent dust fall device for the building construction site comprises a dust fall mounting box, a detachable water flow pushing mechanism is mounted on one side of the dust fall mounting box, and a linkage mechanism is arranged below the dust fall mounting box; a spraying adjustable mechanism is arranged below the linkage mechanism; a torrent mounting plate is fixedly mounted in the dust fall mounting box, and a plurality of groups of circulating grooves are uniformly and fixedly connected to the circumference of the lower end of the dust fall mounting box; a mounting column is fixedly mounted at the lower end of the spraying adjustable mechanism, a supporting frame is fixedly connected to one side of the mounting column, and reinforcing ribs are fixedly connected to the supporting frame. By arranging the spraying adjustable mechanism, water mist generated by the atomizing nozzle is pushed to be more uniformly diffused all around, the dust falling coverage range is expanded, and by designing the air spraying pipelines with different angles, the collision opportunity of dust and the water mist is increased, and the probability that the dust is adsorbed by the water mist is improved.

The utility model discloses a plate compactor with a dust falling function, and relates to the technical field of plate compactors, the plate compactor with the dust falling function comprises a compactor body, and a filter mechanism comprises a connecting frame, a mounting hole and a filter screen. At the moment, the connecting frame is slidably connected to the exterior of the rammer body, the dust suction nozzle enters the interior of the mounting hole, one end of the mounting plate is attached to the exterior of the connecting frame, the other end of the mounting plate is aligned to the threaded hole, the fixing bolt is rotated to be in threaded connection with the interior of the threaded groove to fix the fixing plate, and the connecting frame is fixed at the moment; when the plate compactor works, dust is sucked into the dust collector through the dust suction nozzle, the harm of the dust to workers is reduced while the dust falling function is started, and when the dust suction nozzle sucks the dust, the filter screen blocks large-size solid particles to prevent the large-size solid particles from entering the dust suction nozzle to block the dust suction pipeline. And the maintenance difficulty of workers is reduced.

The invention discloses an efficient wet-type cyclone dust collector with dust falling and carbon sequestration functions. The efficient wet-type cyclone dust collector comprises a dust collection chamber with a closed structure, a microorganism culture chamber, a water purification chamber and a sewage chamber, the front end and the rear end of the dust removal chamber communicate with the outside through an air inlet pipe and an air outlet pipe correspondingly, and an axial flow fan and a cyclone separator are fixedly arranged in the dust removal chamber. A microorganism culture tank is arranged in the microorganism culture chamber and comprises a liquid inlet, a liquid outlet, a stirring mechanism and a cleaning mechanism. According to the efficient wet-type cyclone dust collector with the dust falling and carbon sequestration functions, through mutual cooperation of all the parts, a microbial dust removal technology is integrated on the basis of an existing wet-type dust removal technology, energy consumption can be reduced, the dust treatment effect can be improved, greenhouse gases such as carbon dioxide can be captured and fixed, and the dust falling and carbon sequestration functions are achieved. Therefore, air pollution is reduced, the comprehensive energy utilization efficiency of the dust removal system can be improved, and a more environment-friendly and energy-saving solution is provided for the industrial production process.

The invention discloses a filter bag dust removal framework, and relates to the technical field of dust removal equipment, the filter bag dust removal framework comprises a bottom plate, a framework body and a fixing mechanism, multiple groups of first vibration mechanisms are mounted on the framework body, a soot blowing mechanism is mounted in the framework body, and the soot blowing mechanism comprises a first motor, a reciprocating lead screw and a first guide rod; a moving plate is in threaded connection with the reciprocating lead screw, and the moving plate is in sliding connection with the first guide rod; a connecting plate is arranged on the moving plate, an annular pipe is fixedly connected to the top of the connecting plate, a plurality of air spraying pipes are sequentially communicated with the annular pipe in the circumferential direction of the annular pipe, a draught fan is installed on the top of the connecting plate, and an air inlet of the draught fan is communicated with a filtering piece; an inlet is formed in the bottom plate, first through holes are formed in the inner walls of the two sides of the inlet correspondingly, an adsorption plate is slidably connected into each first through hole, the two adsorption plates are combined to seal the inlet, driving assemblies are installed in the first through holes, and processing mechanisms are installed on the adsorption plates. Dust falling into the framework body can be conveniently treated.

The embodiment of the invention provides an air purifier, a filter screen cleaning method of the air purifier and a medium. The air purifier comprises a filter screen. The first scraping and sweeping device is arranged on the outer side of the filter screen and used for scraping and sweeping the outer side of the filter screen; the ultrasonic device is used for emitting ultrasonic waves to the filter screen, so that the filter screen generates ultrasonic vibration; the second scraping and sweeping device is arranged on the inner side of the filter screen and used for scraping and sweeping the inner side of the filter screen; the dust suction device is used for sucking dust falling from the filter screen; the water spraying device is used for spraying water vapor to the filter screen; and the drying device is used for drying the filter screen after the water spraying device sprays the water vapor to the filter screen. Bidirectional physical cleaning is formed through the first scraping and sweeping device on the outer side and the second scraping and sweeping device on the inner side, dust in the deep layer of the filter screen is loosened and falls off in combination with ultrasonic vibration, the cleaning efficiency is remarkably improved, drying is conducted through the drying device, microorganisms are prevented from breeding in the humid environment, meanwhile, the filtering efficiency of the filter screen is prevented from being affected, and the service life of the filter screen is prolonged.

The utility model provides a spraying dust settling machine which comprises a water tank and a fixing pipe, a top plate and a partition plate are fixedly connected in the water tank respectively, one side of the top plate is fixedly connected with the partition plate, a mixing mechanism connected with the top plate is arranged on one side of the partition plate, and a filtering mechanism is arranged in the water tank located on the other side of the partition plate. The fixed pipe is fixedly installed in the middle of the bottom plate on one side of the water tank, the surface of the movable pipe is movably sleeved with the sleeve, the interior of the sleeve communicates with the movable pipe, and the surface of the fixed pipe is sleeved with the adjusting mechanism. The water tank is used for storing a water source when the spraying dust falling machine is used, water source mixing is achieved in the water tank, the filtering mechanism is arranged for filtering large impurities in the water source, the baffle is arranged for cleaning after being used for a long time, and water source discharging is achieved through cooperation of the fixed pipe and the movable pipe; and the spraying angle can be adjusted by arranging the sleeve, the spraying range is adjusted through rotation of the movable pipe, and the use convenience of the spraying dust falling machine is improved.

The invention discloses automatic stone grinding and dust removing equipment integrating negative pressure adsorption and filtration, and relates to the field of stone grinding, the automatic stone grinding and dust removing equipment comprises a cutting machine, a grinding mechanism and a machining supporting platform, the cutting machine is used for cutting stone, a stone outlet is formed in the cutting machine, and the cut stone is discharged from the stone outlet; the machining supporting platform is arranged at the bottom of the stone outlet and used for bearing the stone, and the grinding mechanism is used for grinding the stone on the machining supporting platform. When stone is placed on the machining supporting platform, the machining supporting platform is provided with a part of suction holes not covered by the stone, and when a negative pressure fan is started in the grinding process of the stone, the negative pressure fan can suck dust into the machining supporting platform, so that the dust falling effect is achieved, and the dust falling problem is solved from a cutting source.

The invention relates to the field of building construction equipment, in particular to dust falling equipment for building construction and a using method thereof.The dust falling equipment comprises a machine base, a mounting frame is arranged at the top of the machine base, an air duct is hinged to the upper end of the mounting frame, and a draught fan is fixedly installed in the air duct. According to the dust falling equipment for building construction, through cooperation of the adjusting mechanism, the nozzles and the transmission mechanism on the supporting structure, the spraying paths of the nozzles can be changed, the radial spraying diameter between the multiple nozzles is increased, and therefore the spraying range and the coverage area are enlarged; through cooperation of the adjusting mechanism and the contraction assembly, the radial diameter at the air duct end can be increased along with deflection of the nozzle, so that the spraying range of the nozzle can be further improved, the radial distance at the air duct end is reduced along with deflection and gathering of the nozzle, dispersion of water mist can be reduced when the dust falling device carries out centralized dust falling on a certain position, and the dust falling efficiency is improved. Therefore, the adaptability of the equipment to different working conditions is improved.

The utility model relates to an anti-blocking heat-tracing-free ash removal device for a dust remover ash bucket of a thermal power plant, which comprises a box body, the lower surface of the box body is fixedly communicated with a dust remover ash bucket main body, a smooth component is arranged on the inner wall of the dust remover ash bucket main body, an anti-blocking mechanism is arranged in the dust remover ash bucket main body, and the dust remover ash bucket main body is fixedly communicated with the box body. An ash outlet is fixed at the bottom end of the dust remover ash bucket main body, and four supporting legs are fixed on the lower surface of the box body. According to the anti-blocking heat-tracing-free dust removal device for the dust remover ash bucket of the thermal power plant, the motor is started, the nozzle faces the bottom of the dust remover ash bucket body, then the blowing device is started, air enters the hose through the connecting pipe and then is sprayed to the bottom of the dust remover ash bucket body through the nozzle, dust falls off, and the dust remover ash bucket is prevented from being blocked through the materials in the smooth assembly. The inner wall of the inner cavity of the dust remover ash bucket main body is waterproof and anti-adhesion, and the probability that dust is attached to the inner wall of the inner cavity of the dust remover ash bucket main body is greatly reduced.

The invention provides a rainwater and wastewater recycling system for a construction site, and relates to the technical field of rainwater collection, the rainwater and wastewater recycling system comprises an underground water well, a water collecting tank is arranged at the upper end of the underground water well, a center shaft is installed at the circle center of the underground water well, and the water collecting tank is rotatably installed on the surface of the center shaft through a bearing; an unfolding assembly is arranged at the top of the water collecting tank, the water spraying rods can be unfolded and folded through the unfolding assembly, in the unfolding state, the plastic cloth between the two water spraying rods can be unfolded to form an umbrella-shaped structure, and rainwater flows into the water collecting tank through the surfaces of the different plastic cloth; impurities and soil in rainwater are filtered in the space formed by the interlayers in the water collecting tank, then the rainwater is collected by the underground water well, when the water spraying rod is folded, the rainwater collected in the underground water well can serve as dust falling spraying water to be conveyed to the water spraying rod, rainwater collection and recycling are achieved, and the device is convenient to install and suitable for a construction site.

The invention relates to efficient and energy-saving waste gas washing equipment. Comprising a washing tower cylinder and a gas inlet cylinder, and a waste liquid collecting box is fixedly connected to the bottom of the gas inlet cylinder; a plurality of rotational flow cylinders are connected between the washing tower cylinder and the air inlet cylinder, and a rotational flow plate and a dust falling assembly are mounted in each rotational flow cylinder; at least two filler supporting plates are fixedly connected in the washing tower cylinder, and each filler supporting plate is elastically connected with a filler cover plate; a spraying structure is arranged above each filler cover plate; the device further comprises a recycling and liquid feeding mechanism; a plurality of filler inlets and a plurality of filler outlets are formed in the washing tower drum; a valve plate device and a discharging slide way are mounted on each filler supporting plate; each filler cover plate is provided with a switching mechanism, the device further comprises a spline shaft movably connected with each switching mechanism, and the spline shaft is fixedly connected with a plurality of stirring and disturbing mechanisms; the device further comprises a rotary driving assembly and a reciprocating driving assembly. The filler can be disturbed regularly, the filler is loosened and prevented from caking under the condition that compaction is guaranteed, the filler can be rapidly replaced, the working efficiency is high, and the waste gas treatment effect is good.

The utility model relates to the field of ore grinding equipment, in particular to ore grinding equipment with a dust falling structure, which comprises a bottom plate, supporting legs, a grinding box, a feeding pipe, a discharging pipe, a coaxial reversing assembly, a crushing and grinding assembly and a dust removing assembly, through cooperative work of the coaxial reversing assembly, the crushing and grinding assembly and the dust removal assembly, the integrated process of ore crushing, fine grinding and efficient dust removal is achieved, through combined operation of the coaxial reversing assembly, the crushing and grinding assembly and the dust removal assembly, the stability in the crushing and grinding process is guaranteed, the crushing effect is improved through reverse rotation, and the crushing efficiency is improved. The dust removal assembly removes dust generated in the whole process, cleanness of the working environment and health of operators are maintained, environmental pollution is effectively reduced, in addition, when the two rotating shafts rotate, the first crushing blade and the second crushing blade can cut ore in the opposite directions, and therefore strong shearing force is generated, and the crushing efficiency is improved. Therefore, the ore can be crushed more effectively and further refined.

The invention relates to the field of air dust falling equipment, in particular to an environment-friendly building construction dust falling treatment device which comprises a machine shell fixedly installed on a movable seat, the top of the machine shell is rotationally communicated with an air inlet pipe, and a driving part for driving the air inlet pipe to rotate is arranged on the machine shell; the fan is fixedly installed on the upper portion of the inner wall of the machine shell, an air outlet of the air inlet pipe is communicated with the fan, the bottom of the fan is fixedly communicated with a filter box, the fan blows air towards the filter box, and a plurality of filter screens are evenly assembled on the outer wall of the filter box in the circumferential direction at intervals. Air is doubly filtered through the filter screen and the water washing box, a linkage system of the shielding mechanism and the dust removal mechanism is matched, and under the condition that normal work of a filter channel of the filter box is not affected, clean air obtained after water washing is used for conducting back flushing cleaning on the isolated filter screen; the problem that the overall efficiency of traditional equipment is reduced due to filter screen blockage is effectively solved.

The invention discloses a landscaping engineering construction dust fall device, and relates to the technical field of construction dust fall, the landscaping engineering construction dust fall device comprises a spraying table, a rotary table is fixedly connected to the upper end of the spraying table, a cleaning mechanism is arranged at the upper end of the spraying table, a supporting mechanism is arranged on the surface of the rotary table, and the rotary table comprises a spraying cylinder rotationally connected to the upper end of the rotary table; a first supporting seat is fixedly connected to the upper end of the spraying table, a first rotating sleeve is rotatably connected to the inner wall of the first supporting seat, a missing gear is fixedly connected to the side end of the first rotating sleeve, a rotating rod is rotatably connected to the upper end of the spraying table, and an upper bevel gear is fixedly connected to the surface of the rotating rod. By adopting the reversing transmission technology that the first rotating sleeve and the missing gear are matched with the upper helical gear and the lower helical gear of the rotating rod, the spraying barrel can be driven to achieve stable periodic reciprocating swing, the limitation of fixed angle or one-way rotation of traditional spraying equipment is broken through, the coverage range of water mist is greatly expanded, and distribution is more uniform.

The invention provides an arrangement method of an excavator spraying and dust falling device and the dust falling device, and relates to the technical field of excavators. The method comprises the following steps: determining a bucket and a required spraying range around the bucket; determining a nozzle mounting reference position; according to the transverse length and the longitudinal length of the spraying range, the number of transverse each row of sprayers and the number of longitudinal each column of sprayers are calculated by combining the effective spraying area of the single sprayers; calculating an included angle between a transverse nozzle and the horizontal direction and an included angle between a longitudinal nozzle and the vertical direction according to the distances from the highest point, the lowest point and the farthest point of the spraying range to the nozzle mounting position; and installing the nozzles according to the calculated number and angle of the nozzles, and controlling the nozzles to spray to form a water curtain covering the spraying range. In the operation process of the excavator, spraying and dust falling are carried out at the same time, the excavator bucket can be cooled, dust generated in the excavation process can also be treated, efficiency is high, cost is low, the spraying water amount is small, accumulated water cannot be generated, and operation safety and operation efficiency are guaranteed.

The invention provides a micro-nano bubble-surfactant synergistic coal seam gas seepage displacement-dust fall method, which adopts a multi-stage gas and dust comprehensive prevention and control means, adopts a pressure pump and a pumping system in a liquid injection period, and controls the pressure and the pumping flow rate, so that the gas seepage displacement and dust fall of a coal seam are realized. A micro-nano bubble-surface active liquid coupling medium is adopted for conducting seepage displacement on coal seam gas, and it is ensured that the coal seam gas is efficiently discharged or extracted. After liquid injection is finished, the micro-nano bubble-surface active liquid coupling medium is stored in the coal seam, dust falling is conducted on the coal seam, reverse wetting of the coal seam is achieved, the water content is increased, and therefore dust is reduced, and the safety of coal mining is improved.

The invention relates to the technical field of dust filtering, in particular to an indoor dust filtering device for safety engineering, which comprises a filtering barrel, an air inlet pipe is mounted at the upper end of the outer side wall of the filtering barrel, an air outlet pipe is mounted at the lower end of the outer side wall of the filtering barrel, a positioning cylinder is movably connected to the upper end of the filtering barrel, and a hollow column is fixedly connected to the lower end of the positioning cylinder. A hollow column is arranged in the positioning barrel, the hollow column extends into a cavity of the filtering barrel, a filtering structure is installed on the outer side wall of the hollow column, a soft connection structure is arranged in the positioning barrel, and the soft connection structure can judge whether the balance weight of the filtering structure is too heavy or not. Meanwhile, when the filter plate is cleaned, the bumping frequency of the filter plate is increased through the gravity of the filter plate, the interval of rotating speed switching of the filter plate is increased, the cleaning effect on the filter plate is improved, then through a scraping structure, the upper surface of the dust falling plate is scraped, and meanwhile dust is prevented from flowing backwards.