218results about How to "Reduce noise pollution" patented technology

The invention provides a motor stator vibration suppression method and system based on an electromagnetic pad and deep learning, and relates to the field of electrical technology, and the method comprises the steps: collecting a vibration signal of a motor stator, and carrying out the preprocessing of the vibration signal; inputting the preprocessed signal into a deep learning model, and training and optimizing the deep learning model; fusing the features through a full connection layer to obtain a comprehensive feature vector; predicting the future vibration state of the motor stator by using the comprehensive feature vector; establishing an electromagnetic force model, and designing an adaptive control law based on the predicted future vibration state and the electromagnetic force model; electromagnetic force required by vibration suppression is calculated by using a self-adaptive control law and is converted into a control signal to adjust the electromagnetic pad; a multi-objective optimization algorithm is used to consider the vibration suppression effect and energy consumption at the same time, an adaptive control law is adjusted, and closed-loop feedback control is formed to continuously optimize the vibration suppression effect.

The invention provides a loader driven by double motors and a maintenance method thereof, and relates to the technical field of engineering mechanical equipment, the loader comprises a frame, a cab and wheels arranged on the frame, a bucket arranged at the front end of the cab, a working device arranged at the right rear end of the frame, and a walking device arranged at the left side of the frame; the working device is arranged above the right side of the walking device; the working device comprises a working motor, a first fixing piece and a second fixing piece; the walking device comprises a walking motor, a third fixing piece, a fourth fixing piece, a fifth fixing piece and a sixth fixing piece. The first fixing piece is fixed with the rear end of the frame; the second fixing piece, the third fixing piece and the fourth fixing piece are fixed with the right lower end of the frame; and the fifth fixing piece and the sixth fixing piece are fixed with the left lower end of the frame. A pure electric driving system is adopted, and the working device and the walking device are driven by double motors to work, so that emission of carbon dioxide and other harmful gases is effectively reduced, and noise pollution is reduced.

The utility model relates to the technical field of equipment sound insulation, and discloses a sound insulation cover which comprises a sound insulation box body, a moving assembly and an air outlet assembly. According to the soundproof cover, a soundproof box body is stably installed through fixing feet, a first rotating rod driven by a motor is arranged in the soundproof cover, the first rotating rod is in linkage with a second rotating rod through a first rotating wheel, a rotating belt and a second rotating wheel, synchronous rotation is ensured, and reverse threads are arranged outside the first rotating rod and the second rotating rod; the two movable box bodies in threaded connection with the two movable box bodies can be close to or far away from each other under guiding of the steel rails, the first rotating rods and the second rotating rods are distributed in a staggered mode, the situation that the heat dissipation effect is poor due to mutual blowing is avoided, and small motors in the two movable box bodies drive fans to rotate, so that heat dissipation is effective; a ventilation assembly of the soundproof cover is composed of a first ventilation plate and a second ventilation plate which are located on the front side and the rear side of the soundproof box body respectively, Z-shaped ventilation holes are formed in the ventilation assembly, and the design of the soundproof plate is matched, so that the ventilation and heat dissipation requirements are met, and noise transmission is reduced.

The utility model discloses a pressure regulating silencer with a deslagging function, which comprises a silencing pipe, a pressure regulating sleeve sleeved on the silencing pipe and a silencing outer sleeve sleeved outside the pressure regulating sleeve, a silencing chamber is formed between the silencing pipe and the silencing outer sleeve, a deslagging silencing hole communicated with the silencing chamber is arranged on the silencing pipe, and a deslagging hole is arranged on the silencing outer sleeve. The residue discharging holes are formed in the silencing outer sleeve, so that independent residue discharging paths are formed among the residue discharging silencing holes in the silencing pipe, the silencing chamber between the silencing pipe and the silencing outer sleeve and the residue discharging holes in the silencing outer sleeve, and residues do not need to enter the nail fixing device any more. The nail fixing device effectively prevents the residues from entering the nail fixing device to cause corrosion, jamming and other damage to key components (such as a firing pin assembly), greatly prolongs the service life of related equipment components, reduces the maintenance frequency and cost caused by component damage, does not need to disassemble and assemble the nail fixing device main body to clean the residues in the nail fixing device, and improves the working efficiency. And the overall reliability and stability of the equipment are improved.

The utility model relates to a prefabricated middle partition wall structure of a tunnel ventilation inclined shaft. The prefabricated middle partition wall structure at least comprises a bottom supporting structure, a steel supporting assembly and a prefabricated modular wallboard. A positioning groove is formed in the top face of the bottom supporting structure, and the bottom of the steel supporting assembly is embedded into the positioning groove and fixed. The prefabricated modular wallboard is formed by splicing a plurality of prefabricated slabs, the adjacent prefabricated slabs are connected through tongue-and-groove structures which are matched in a concave-convex mode, and the tongue-and-groove joints are filled with sealing materials. The steel supporting assemblies are longitudinally arranged at intervals, and the tops of the steel supporting assemblies are fixed to a tunnel lining to form a steel-concrete combined structure for supporting the prefabricated modular wallboard. The steel supporting assembly and the prefabricated modular wall plate form a steel-concrete prefabricated structure, and the stability of the whole structure is enhanced. By adopting the autoclaved aerated concrete precast block material and the concave-convex groove embedded modular structure, the problems that the construction quality is difficult to control, the construction period is long, the on-way resistance of air flow is large and the like in the existing reinforced concrete mid-partition wall are solved.

The utility model discloses a mute dust removal device for an air port of a fresh air fan, which belongs to the field of mute dust removal devices and comprises an air feeder body, an air exhaust pipeline is fixedly connected to one side of the air feeder body, an air supply pipeline is fixedly connected to the other side of the air feeder body, and a mute dust removal mechanism is movably mounted on the air exhaust pipeline and the air supply pipeline. According to the silent dust removal mechanism, a movable plate is sealed in a filter box through a first sealing ring and a second sealing ring, a filter plate on the upper portion of the movable plate is located in the filter box and filters inlet air, and when a large amount of dust is accumulated on the filter plate on the upper portion, the movable plate is pulled upwards out of the filter box; according to the fresh air ventilator, the movable plate is arranged, the filter plate below the movable plate is moved into the filter box, the filter plate on the upper portion is cleaned, the filter plate on the movable plate is more convenient to clean, work of the fresh air ventilator is not affected, noise reduction and noise pollution reduction are conducted on the air supply pipeline and the air exhaust pipeline through half-ring-shaped silencing cotton in a silencing ring, and the fresh air ventilator is more suitable for use.

The invention provides a desktop type multidirectional adjusting grinding machine for grinding a steel cord wire rod. The desktop type multidirectional adjusting grinding machine comprises a base, an adjusting moving rod, an angle adjusting mechanism, a deviation rectifying mechanism, an operating platform and a driving mechanism. The driving mechanism, the adjusting moving rod and the deviation rectifying mechanism are mounted on the base; the angle adjusting mechanism is installed in the direction of the first end of the adjusting moving rod. A connecting supporting plate is fixed to the front end of the adjusting moving rod in the first end direction, and an operation platform is fixed to the upper surface of the connecting supporting plate. The abrasive belt is sleeved on the driving wheel and the three driven wheels of the driving mechanism, and the motor drives the driving wheel to drive the abrasive belt to polish the fracture of the wire rod. The angle adjusting mechanism is installed on the side face of the front end of the adjusting moving rod and used for adjusting the angle of the limiting baffle to be perpendicular to the operation platform, and the working area of the abrasive belt is perpendicular to the operation platform; the deviation rectifying mechanism is installed on the upper portion of the installation frame and used for adjusting the abrasive belt to be centered, and deviation rectifying fine adjustment of the abrasive belt is achieved.

The invention relates to an ultrasonic synergistic electrostatic dust collection coal mine grouting material crushing device and a use method, and belongs to the technical field of crushers. The device comprises a shell, a feeding bin, a jaw type crushing device, an ultrasonic crushing device and an electrostatic dust collection device, the feeding bin is arranged at the top of the shell, the jaw type crushing device, the ultrasonic crushing device and the electrostatic dust collection device are sequentially arranged in the shell from top to bottom, and the jaw type crushing device, the ultrasonic crushing device and the electrostatic dust collection device are all connected with a control system. The jaw type crushing device comprises a movable jaw, a fixed jaw and a hydraulic telescopic rod, the fixed jaw is fixedly arranged on one side of the top in the shell, the hydraulic telescopic rod is fixedly arranged on the other side of the top in the shell, and the movable jaw is arranged at the output end of the hydraulic telescopic rod. The high-frequency vibration and cavitation effect of ultrasonic waves are utilized, the crushing process of materials is accelerated, the crushing efficiency is remarkably improved, meanwhile, the ultrasonic crushing device is matched with the jaw type crushing device for secondary crushing, continuous crushing can be achieved, and the problem of non-continuous crushing of a traditional jaw type crushing machine is solved.

The present invention relates to the technical field of weeding equipment, and in particular to a weeding robot, comprising: a frame, the frame being provided with a baling box, the bottom of the frame being provided with a walking assembly; a mowing assembly, the mowing assembly comprising an adjusting mechanism and a cutting mechanism; a transport assembly, the transport assembly comprising a transverse conveyor belt and a longitudinal conveyor belt; a packing assembly, the packing assembly comprising a bag mechanism, a sealing mechanism and a unloading mechanism, the bag mechanism being used to lay grass baling bags inside the baling box, the sealing mechanism being used to perform hot-melt sealing on the baling bags, and the unloading mechanism being used to unload the sealed baling bags from the baling box. The present application realizes the rapid removal of weeds on a small lawn by providing an efficient mowing assembly, a mowing assembly and a transport assembly, and automatically packs and collects the cut weeds, thereby greatly improving the efficiency and environmental friendliness of lawn maintenance in public spaces.

The utility model discloses an automatic adhesive tape cutting machine, and relates to the technical field of cutting devices. The two sides of the top face of the base are fixedly connected with vertical plates, the upper portions of the side walls of the vertical plates are connected with screw rods in a penetrating and rotating mode, the rod ends of the screw rods are fixedly connected with first belt wheels, the screw rods are sleeved with cutting wheels, one sides of the cutting wheels are provided with tensioning rollers, and the other sides of the cutting wheels are provided with conveying rollers; a sound absorption pad is arranged above the cutting wheel, a support is fixedly connected to the side wall of the sound absorption pad, and the bottom face of the support is fixedly connected with the top face of the vertical plate. According to the adhesive tape cutting device, a whole piece-shaped adhesive tape can be cut into small piece-shaped adhesive tapes, the position of the cutting wheel can be adjusted so that the cutting width of the adhesive tape can be adjusted according to the processing requirement, meanwhile, the adhesive tape can be straightened during cutting, the adhesive tape is prevented from being loosened and adhered together, and the adhesive tape cutting efficiency is improved. And noise generated when the cutting wheel cuts the adhesive tape can be reduced.

The invention discloses a road construction joint cutter which comprises a trolley, two electric telescopic rods are fixed to the trolley, the telescopic ends of the electric telescopic rods are fixed to a lifting plate, the lower side of the lifting plate is fixedly connected with a machine shell, a joint cutting blade is arranged in the machine shell, and a driving mechanism used for driving the joint cutting blade to rotate is installed on the machine shell. The lower half section of the joint cutting blade is located outside the machine shell, a sound insulation and dust isolation mechanism is slidably installed on the outer side of the lifting plate, the bottom of the sound insulation and dust isolation mechanism is lower than the bottom end of the joint cutting blade, a water cooling mechanism inserted into the machine shell and pointing to the joint cutting blade is installed on the trolley, and a dust removal mechanism inserted into the sound insulation and dust isolation mechanism is installed on the trolley. During cutting, cooling is convenient, and the cutting blade is prevented from being overheated; noise generated during cutting is conveniently isolated and absorbed, and noise pollution is reduced; and dust during cutting is conveniently collected and filtered, and dust pollution is reduced.

The invention relates to the technical field of cutting, and provides a broken bridge aluminum door and window assembling and processing machine which comprises a base, a first motor is fixedly installed on the front portion of the base, a first threaded rod is fixedly installed at the output end of the first motor, a first sleeve is installed on the surface of the first threaded rod in a threaded mode, and a connecting rod is fixedly installed on the circumferential face of the first sleeve. A support is fixedly installed at the top of the connecting rod, a second motor is fixedly installed at the top of the support, a second threaded rod is fixedly installed at the output end of the second motor and is in threaded connection with a second sleeve, an electric push rod is fixedly installed on the circumferential face of the second sleeve, and laser cutting equipment is fixedly installed at the output end of the electric push rod. And a protection device is arranged at the top of the base. According to the technical scheme, the problem that in the prior art, when equipment works, workers are accidentally injured or other objects interfere with the equipment is solved.

The utility model relates to the technical field of concrete mixing plants, in particular to an environment-friendly mixing plant which comprises an aggregate feeding device, the aggregate feeding device comprises a storage bin and a feeding device, the feeding device comprises a conveying channel and a conveying mechanism, the conveying mechanism is arranged in the conveying channel, and the conveying channel is communicated with the storage bin. A discharging hopper is arranged on the material conveying channel and used for being communicated with the outside, the discharging hopper is in lap joint with one end of the conveying mechanism, and the other end of the conveying mechanism is in lap joint with a feeding port of the material storage bin. The feeding device is small in occupied area, high in feeding efficiency, beneficial to achieving automatic aggregate production, capable of effectively reducing dust and noise pollution in a mixing plant factory area in the concrete production process, environmentally friendly and economical.

This invention discloses a biomimetic starfish robot, relating to the field of simulation robots. The biomimetic starfish robot includes a biomimetic exoskeleton, which is obtained by folding a flat plate structure with creases; a shape memory alloy, which is disposed on the biomimetic exoskeleton and drives the biomimetic exoskeleton to deform through its own deformation; and a driving unit for driving the shape memory alloy to deform. The biomimetic starfish robot proposed in this invention uses an electric heating system attached around the shape memory alloy, which can transfer heat to the surrounding environment in a short time. Because the shape memory alloy at the arm-foot junction has a small volume and a low temperature of the austenite phase, the circuit system only needs a relatively weak electrical signal to generate enough heat to deform the shape memory alloy. Therefore, this invention will greatly reduce power consumption, reduce noise pollution, and simplify the design of the circuit system.

The invention belongs to the field of air pipes, and particularly relates to a fabricated environment-friendly silencing air pipe which comprises edge strips. A storage cavity is formed in each edge strip, a polyurethane foaming agent is stored in each storage cavity, an injection opening is formed in the bottom end of each storage cavity, the four sets of edge strips are arranged, an outer side plate is arranged between every two sets of edge strips in the longitudinal direction, one side of each outer side plate is attached to the corresponding inner side plate, and the other side of each outer side plate is attached to the corresponding inner side plate. A plurality of sets of exhaust ports are formed in the center position of the side, away from the inner side plate, of the outer side plate, filling noise elimination mechanisms are arranged between the outer side plate and the edge strips and between the inner side plate and the edge strips, and an assembly type noise elimination mechanism is arranged between every two transverse sets of edge strips; the filling noise elimination mechanism is used for suppressing noise generated when the air flow impacts the inner side plate; through the structural design of the combination of the filling noise elimination mechanism and the assembly type noise elimination mechanism, the function of suppressing wind noise from multiple directions is achieved.

The invention relates to the field of vacuum pumps, in particular to a vacuum pump with a self-heating heat exchange function device and a heat exchange control method thereof.The vacuum pump comprises a machine cabinet, a first pump body and a second pump body, a controller is arranged on the side face of the machine cabinet, and a central heat exchanger is arranged in the machine cabinet; the first pump body and the second pump body communicate with the central heat exchanger through a first connecting pipe and a second connecting pipe correspondingly, a gas heat exchange assembly is arranged in the central heat exchanger, a heat exchange cooling area is formed in the central heat exchanger, a cooling circulation pipe is arranged on the side face of the central heat exchanger, and the cooling circulation pipe is connected with a first-stage heat exchanger. A heat exchange silencer is connected to the second pump body, a gas silencing heat exchange assembly is formed in the heat exchange silencer, a heat exchange circulating pipe is arranged on the side face of the heat exchange silencer, and the heat exchange circulating pipe is connected with a second-stage heat exchanger. And the energy utilization efficiency of the system is improved.

The present invention belongs to the technical field of cable traction transmission, and discloses a variable-diameter cable transmission mechanism and a control method thereof. The traction mechanism includes a transmission device, a hydraulic power device and a control device. The transmission device includes a pair of left-right symmetrical conveyor belt traction mechanisms. The conveyor belts of the two conveyor belt traction mechanisms are arranged oppositely, and there is a gap between the two for transmitting cables; an annular groove is opened on the circumference of the outer surface of the conveyor belt, and the annular groove is used to wrap cables to be transmitted with different radii; a clamping module is also arranged on the inner side of each conveyor belt, and the clamping modules arranged oppositely cooperate to squeeze the corresponding conveyor belt to reduce the spacing of the gap and press the cable to be transmitted into the grooves on both sides thereof. When the transmission mechanism of the present invention transmits the cable, the clamping module can squeeze the conveyor belt under the drive of the hydraulic power device, so that the groove on it can wrap the cable to avoid cable friction damage.

The utility model relates to noise reduction device technical field, concretely is the noise reduction device of acoustic wave ash removal and blockage remover, including acoustic wave ash removal and blockage remover, acoustic wave ash removal and blockage remover includes pneumatic sounder, the rear side of pneumatic sounder is equipped with sound wave guide pipe, the outer wall of sound wave guide pipe is equipped with mounting disc, the outer wall of pneumatic sounder is equipped with air inlet end, the outside of acoustic wave ash removal and blockage remover is equipped with shell, the shell includes first half cylinder shell body, the right side detachable connection of first half cylinder shell body has second half cylinder shell body, the inner wall of first half cylinder shell body and second half cylinder shell body is connected with the noise reduction cylinder in common, the front side of shell is equipped with the closing plate. The noise reduction device of acoustic wave ash removal and blockage remover, through increasing the shell and the noise reduction cylinder structure outside acoustic wave ash removal and blockage remover, adopt the multilayer noise reduction design of damping layer, sound insulation layer and sound absorption layer, effectively absorb, insulate and weaken the low frequency vibration noise and the medium high frequency air noise that acoustic wave ash removal and blockage remover generates when operating.

The utility model discloses an efficient air conveying system for processing ultra-fine calcium carbonate, which is characterized in that a blanking control valve is arranged on a blanking pipe, the rear end of the blanking pipe is connected with a main conveying pipe, the front end of the main conveying pipe is connected with a front-end fan, the main conveying pipe is connected with a plurality of conveying branch pipes, and the conveying branch pipes are connected with an air blower. According to the efficient air conveying system for ultra-fine calcium carbonate processing, the situation that in the prior art, in the actual use process, tail gas at the rear end is still directly exhausted as waste gas, waste of aerodynamic force and air pressure is caused, and noise is large is improved; by arranging the air suction pump and the return pipe, the whole air conveying system is integrally closed, the pressure loss in the conveying process can be reduced, the conveying efficiency can be improved, the energy consumption can be reduced, the closed system can reduce low-frequency noise in the equipment production process to a certain extent, and noise pollution is reduced.

The present disclosure provides a kind of cement kiln SCR denitration system with acoustic wave soot blower device, cement kiln SCR denitration system with acoustic wave soot blower device can include: acoustic wave generator and first function structure, acoustic wave generator has acoustic wave output port, acoustic wave generator is configured to at least output first acoustic wave and second acoustic wave by acoustic wave output port, first acoustic wave propagates along first propagation path, second acoustic wave propagates along second propagation path different from first propagation path;First function structure is provided with at least one first function area, first function area is arranged on second propagation path, for interacting with second acoustic wave, to at least generate third acoustic wave of propagation direction change and intensity less than second acoustic wave, third acoustic wave propagates along third propagation path, and first propagation path and third propagation path all pass through first target surface, so that first acoustic wave and third acoustic wave can all act on first target surface, first target surface is the surface where the area to be cleaned or cleaned of slag is located.

The utility model provides a roof cornice waterproof structure for architectural design, which comprises a mounting rack, a water guide box, a water storage box, a water storage box, a water storage box, a water storage box, a water storage box, a water storage box, a water storage box and a water storage box, and is characterized in that the mounting rack is fixed on a wall surface and is arranged right below an eave; one side of the filtering box is hinged to one side of the top of the water diversion box, the other side of the filtering box is in lap joint with the other side of the top of the filtering and water diversion box, and the filtering box is used for collecting and blocking sundries in rainwater; the impurity removal part is mounted on the filter box and the water diversion box and is used for pulling and turning over the filter box; according to the roof cornice waterproof structure for building design, through the arrangement of the filter box, the effect of filtering impurities falling into the water diversion box is achieved, and the situation that leaves and other large-size impurities fall into a water diversion box plate, and consequently the drainage part is blocked is avoided; the problems of water accumulation and leakage are avoided, impurities in the filter box can be cleaned under the cooperation of the impurity removal part, and the situation that the filter box is blocked after being used for a long time, and use is affected is avoided.

The utility model belongs to the technical field of thermal insulation pipes, and particularly relates to a prefabricated thermal insulation pipe feeding mechanism which comprises a movable support, a transverse moving air cylinder, a lifting air cylinder, a left clamping air cylinder, a right clamping air cylinder, a connecting frame, a guide rail, a moving seat, a lifting air cylinder connecting seat and a clamping air cylinder connecting seat. The connecting frame is fixed to the top of the movable support, a piston rod of the transverse moving air cylinder is connected with the moving seat, the other side of the moving seat is fixedly connected with the side portion of the lifting air cylinder connecting seat, a piston rod of the lifting air cylinder is connected with the top of the clamping air cylinder connecting seat, and the clamping air cylinder connecting seat is fixedly connected with the clamping air cylinder. Piston rods of the left clamping air cylinder and the right clamping air cylinder are provided with clamping arms respectively, and the clamping arms are provided with positioning columns. According to the device, the manual feeding procedure of workers is replaced, the labor intensity of the workers is relieved, the work is safer, time-saving and labor-saving, dust and noise pollution is reduced, and a better working environment is provided for the workers.

The embodiment of the invention provides a sound insulation structure used for a cold rolling temper mill and provided with double roller shutter doors. The sound insulation structure comprises a cold rolling temper mill rack and the two roller shutter doors. The cold rolling leveling rack is of a hollow house-shaped structure arranged on the outer side of the cold rolling leveling machine in a sleeving mode, and a door-shaped rack opening is formed in one side face of the cold rolling leveling rack. The roller shutter door comprises a winding drum, a winding shaft located in the winding drum and a roller shutter used for shielding an opening of the rack, the winding drum is connected with the top of the cold rolling leveling rack through a roller shutter door mounting frame, the winding shaft is located on the side of the opening of the rack, and the roller shutter can move up and down along with rotation of the winding shaft; guide rails are connected to the left side and the right side of the opening of the rack. Guide rail grooves for containing the roller shutters are formed in the inner side faces of the guide rails. According to the technical scheme, the structure is simple, noise generated during operation of the cold rolling temper mill can be effectively blocked, the environment of a working area is improved, safe production can be smoothly carried out, and meanwhile the wind-resistant, flame-retardant and waterproof effects are achieved.

The utility model discloses a green permeable pavement which comprises a permeable asphalt layer, a surface layer is arranged on the surface of the permeable asphalt layer, turf is paved on the surface of the surface layer, a fixed grid is arranged on the bottom surface of the permeable asphalt layer, a permeable surface brick layer is arranged on the bottom surface of the fixed grid, and a filter layer is arranged on the bottom surface of the permeable surface brick layer. A semi-rigid base layer is arranged on the bottom surface of the filtering layer, a bearing layer is arranged on the bottom surface of the semi-rigid base layer, the fixed grid, the water-permeable surface brick layer, the semi-rigid base layer, the protective agent, the bearing layer and the gravel layer are arranged, and the fixed grid is located between the water-permeable asphalt layer and the water-permeable surface brick layer, so that the bearing capacity and durability of the pavement can be remarkably improved; the bearing layer is located between the surface layer and the base layer and can reduce impact on the pavement structure by dispersing loads, and the protective agent is made of a polyurethane material and can form a layer of tough film, so that the wear resistance of the pavement is greatly improved, and the service life of the permeable pavement is prolonged.

The utility model discloses crushing equipment for engineering plastics, and relates to the technical field of engineering plastic crushing. Comprising a rack, spring shock absorbers are installed at the top of the rack, a joist is installed at the tops of the spring shock absorbers, a crushing bin is installed on the joist, a discharging bin is installed at the bottom of the crushing bin, a feeding bin is installed at the top of the crushing bin, a crushing cutter shaft is installed in the crushing bin through a bearing, and a gear motor is installed on the joist. According to the crushing equipment for the engineering plastics, after materials are fed, the gear motor drives the crushing cutter shaft to rotate, so that the materials are cut and crushed, in the crushing process, reflected sound waves in the crushing bin can be effectively absorbed and reduced through cooperation of the microwell plate lining and the glass wool sound absorption plate, noise pollution is reduced, and meanwhile, the crushing efficiency is improved. The spring shock absorbers below the crushing bin can absorb shock and impact caused by mechanical operation, so that noise caused by mechanical shock is attenuated, and the surrounding working environment is further guaranteed.

The utility model provides a deep foundation pit backfilling device, and belongs to the technical field of deep foundation pit backfilling. Adjustable supporting legs and locking universal wheels are fixedly installed on the bottom face of a supporting frame, a balance weight stacking groove is fixedly installed in the supporting frame, a balance weight is placed in the balance weight stacking groove, the top end of the supporting frame is fixedly connected with one end of a supporting frame, and the other end of the bottom face of the supporting frame is detachably and fixedly connected with the upper end of a top end barrel. The lower end of the top end cylinder is arranged in the upper end of the telescopic cylinder in a sleeved mode, and the top end cylinder and the telescopic cylinder can slide relatively and are limited in the height direction. According to the utility model, the backfill soil can be accurately backfilled to the required position, the collision to the side wall of the foundation pit is avoided, the problem of narrow backfill terrain of the deep foundation pit is effectively solved, the noise pollution can be reduced, and the dust raising height can be effectively reduced.

The present invention discloses a preparation method of granulated material for friction material and its application in copper-free NAO type brake pads for high-end agricultural machinery and equipment, belonging to the technical field of agricultural machinery and equipment accessories. The copper-free NAO type brake pads for high-end agricultural machinery and equipment have the following components in mass fraction: 80-95% of granulated material for friction material, 0-10% of nitrile rubber modified phenolic resin and 2-15% of non-straw fiber; wherein the non-straw fiber includes one of rock wool fiber, sepiolite fiber or composite mineral fiber; the preparation method comprises the following steps: preparation of granulated material for friction material; mixing and mold filling in the process of preparing brake pads, hot pressing and heat treatment, surface ablation and post-processing molding. The preparation of granulated material of friction material in the present invention can enhance the fluidity of raw materials of brake pads, reduce dust pollution and fiber segregation in the process of preparing brake pads, reduce the density of brake pads and stabilize the friction factor, improve the wear resistance and reliability of brake pads, and reduce the amount of brake dust.

The embodiment of the invention provides a processing method of a glass panel for a touch screen and the touch screen. The processing method of the glass panel for the touch screen comprises the following steps: providing a glass substrate and an etching solution; the glass substrate comprises an opening area, and laser irradiation is carried out on the opening area of the glass substrate; the glass substrate is placed in the etching liquid to be soaked, the part, located in the hole opening area, of the glass substrate is etched away through the etching liquid, and the glass panel for the touch screen is obtained. According to the processing method of the glass panel for the touch screen and the touch screen provided by the embodiment of the invention, a traditional numerical control lathe physical cutting method is replaced by a chemical etching method, and higher precision and smaller feature size can be realized by chemical etching; the CNC cutting may cause micro-cracks or fragmentation on the edge of the hole, and the chemical etching can significantly reduce the micro-cracks on the edge of the hole due to the non-contact processing mode, thereby improving the strength and reliability of the glass.

The present invention discloses a fan assembly with a noise reduction function, comprising a fan housing, a fan arranged in the fan housing, and an air duct having an air inlet and an air outlet and connected to the fan housing; at least two layers of silencing substrates are arranged in the air duct, which are spaced from each other and extend along the wind direction in the air duct, and the silencing substrate has a plurality of groups of silencing units continuously arranged along its extension direction, and a control mechanism is provided to control the protrusion degree of at least part of the silencing units relative to the silencing substrate, so that the silencing substrate is in a silencing state, and a plurality of groups of silencing units constitute a waveform structure that offsets noise sound waves. The present invention also discloses an integrated stove having the fan assembly, and a noise reduction control method based on the fan assembly. The beneficial effect of the present invention is that the waveform structure formed by the silencing substrate offsets the noise waveform, thereby achieving the effect of noise regulation.

The utility model relates to hidden rail adjusting screw automatic feeding technology field, more specifically, it relates to a screw automatic sequencing feeding device, including frame, storehouse, belt material spare, sweep material spare, push material spare, unloading slide, storehouse assembly is in the frame and is used to place screw, and the belt material spare is located in the storehouse and moves along the vertical of storehouse to and fro, the top wall of belt material spare is equipped with the clamping groove, the clamping groove is used to place the stem of screw, and the sweep material spare is located on the storehouse and moves along the transverse of storehouse to and fro, and the push material spare is set up in the longitudinal both sides of storehouse with unloading slide, and in the vertical of storehouse all are located between sweep material spare and belt material spare, when the belt material spare rises to the preset height, the sweep material spare transverse movement is used for sweeping back the screw of belt material spare on the reverse state to the storehouse, and the push material spare is used for pushing the screw of belt material spare on the front state and moves to unloading slide, the utility model discloses a screw automatic sequencing feeding device has the effect of reducing processing noise, reduces equipment cost.