51results about How to "Reduce the noise decibel" patented technology

The invention discloses an air humidifier with a purification function. The air humidifier comprises a shell body, wherein a water tank is arranged at the lower part in the shell body, and an evaporator part and a water distribution structure are further arranged in the shell; the evaporator part is located above the water tank, and the lowest position of the evaporator part is higher than a highest liquid level in the water tank; and a fan assembly is arranged at the upper end of the shell body, an air inlet is formed in the side wall of the shell body, an air outlet is formed in the upper part of the shell body, and the air outlet is arranged above the fan blades of the fan assembly. The air humidifier aims to solve the problems that the humidification rate in a unit volume is not high and the humidification effect is not easy to control in an existing humidifier.

The invention discloses a transparent sound insulation coating, and relates to the technical field of building materials. The transparent sound insulation coating is prepared from the following raw materials in parts by weight: 20-50 parts of rubber powder, 30-45 parts of mica powder, 15-32 parts of gypsum powder, 10-23 parts of clay, 5-13 parts of cotton fiber, 12-18 parts of isocyanate, 5-10 parts an emulsifier, 1-3 parts of an dispersant, 4-9 parts of a binder, 2-10 parts a decolorizing agent and a proper amount of deionized water. Compared with the prior art, the coating provided by the invention has the transparent sound insulation effect; when glass is coated with the coating, the double sound insulation effect can be realized; when a wall is coated with the coating, not only is the sound insulation effect realized, but also original pattern and color of the wall cannot be affected.

The invention relates to the field of oil drilling and exploitation equipment, in particular to a protective noise reduction device used in a fracturing equipment operation site. The protective noisereduction device comprises protective noise reduction walls movably connected with a foundation, first corner modules fixedly connected with one edges of the protective noise reduction walls, second corner modules fixedly connected with the first corner modules, and corner tie rods fixedly connected with the first corner modules and the second corner modules correspondingly. According to the protective noise reduction device, the structure is simple, by adopting the protective noise reduction device, the protective noise reduction walls can be prevented from being damaged by spattered high-pressure disintegrating slag, the noise sound level of night operation can be lowered to be 55dB or below, impact resistance of the protective noise reduction walls is strengthened, modular design is achieved, thus disassembly and loading and transportation are convenient, displacement at all directions among protective noise reduction modules, the first corner modules and the second corner modules is limited, and the positions of the modules in the transportation process are relatively fixed to each other.

A public place intelligent queuing machine system comprises a server, a queuing machine host, two-dimensional code scanners, a mobile phone temporary terminal APP and queuing bracelets, a control signal is transmitted between the queuing machine host and the server in a wireless manner, and the two-dimensional code scanners are arranged at office windows; the server is used for controlling receiving, processing and sending of information of the queuing machine host, the scanners, the mobile phone temporary terminal APP and the queuing bracelets; and the queuing machine host can display various two-dimensional codes to meet transaction requirements for different businesses. When a mobile phone scans the correspond two-dimensional code of the queuing host, the mobile phone automatically downloads the temporary APP, and generates a two-dimensional code in the APP used for being scanned in order to identify client queuing information. The intelligent queuing machine system saves 80% or above of the queuing time of people, saves consumables required by previous paper printing in the business halls of all mechanisms, greatly reduces noises in the business halls, properly reduces the area of the business halls, and saves the cost.

The invention discloses a working-condition self-adaptive lifting and falling-prevention device of a scaffold. The working-condition self-adaptive lifting and falling-prevention device of the scaffold comprises a scaffold lifting mechanism, a lever type linkage mechanism and a falling-prevention mechanism, wherein the scaffold lifting mechanism, the linkage mechanism and the falling-prevention mechanism are arranged on a frame, a bolt hole which is connected with a scaffold frame is formed on the lower portion of the frame, the scaffold lifting mechanism is connected with the falling-prevention mechanism through the linkage mechanism, and the upper portion of the linkage mechanism is connected with an outer wall. The working-condition self-adaptive lifting and falling-prevention device of the scaffold has the advantages of well achieving purposes of normal lifting and falling-prevention due to the fact that an integrated drive system is formed by achieving the normal lifting function through the scaffold lifting mechanism, achieving real-time monitoring and transmission to a lifting state through the linkage mechanism and achieving the emergency-brake handling to sudden accidents through the falling-prevention mechanism; being skillful in design, convenient to install, safe and reliable, particularly suitable for the scaffold in the high-rise building construction and good in popularization and use value.

The invention provides a vibration noise suppression device for a three-phase AC motor, which comprises sound absorbing cotton and a ventilation cooling fan. A motor mounting plate has a rectangular plate structure; a rubber cushion and a mounting rubber strip are respectively mounted on the upper end surface and the lower end surface of the motor mounting plate; the three-phase AC motor is mounted on the top end surface of the motor mounting plate; a noise reduction casing has a circular arc-shaped hood structure; the noise reduction casing is mounted on the top end surface of the motor mounting plate; and the three-phase AC motor is located inside the noise reduction casing. When the three-phase AC motor works, the noise is absorbed through the sound absorbing cotton arranged on the inner wall of the noise reduction casing, the noise decibel of the three-phase AC motor is weakened, and influences of the noise of the three-phase AC motor on an external working environment are reduced;and as venting holes at two sides of the noise reduction casing are arranged, ventilation operation can be carried out inside the noise reduction casing through the venting holes, and the effects ofventilation of a three-phase AC motor mounting area in the noise reduction casing are ensured.

The invention discloses a hardware intelligent punching milling machine and a system thereof, and relates to the technical field of machine processing equipment. The hardware intelligent punching milling machine comprises a base and a positioning hand ring, wherein a metal framework is fixedly connected onto the surface of the base; one surface of the metal framework is fixedly connected with a scanning device; a noise reduction device is glidingly connected with the peripheral side surface of the base; the scanning device comprises a fixing rod; one end of the fixing rod is fixedly connectedwith the metal framework; one end of the fixing rod is fixedly connected with a scanning motor; one end of an output shaft of the scanning motor is fixedly connected with a rotating support frame; a reflecting mirror is fixedly connected onto the inner surface of the rotating support frame; an infrared emitter is fixedly connected onto the inner surface of the rotating support frame. Through the scanning device, the infrared light rays are emitted; the positioning hand ring receives the infrared light rays and transmits positioning information to the control panel; the control panel controls the noise reduction device to perform blocking between the noise source and an operator; the noise is rebounded; the noise near the operators can be effectively reduced; the advantage of independent noise reduction is realized.

The invention discloses an engine cover convenient to reduce noise and insulate heat of an engine. The engine cover convenient to reduce noise and insulate heat of the engine comprises a device body. The device body comprises an engine cover body and a water tank body. A plurality of heat dissipating covers are arranged at the top of the engine cover body, and a plurality of heat dissipating holes are formed in the surface of the heat dissipating covers; an engine cover handle is arranged at one side of the engine cover body, and a water inlet is formed at the top of the water tank body; a sound absorbing layer is arranged in the engine cover body, and sound absorbing cotton is arranged in the sound absorbing layer, and a water pipe is arranged at the inner wall of the sound absorbing layer; the water tank body comprises a water storing layer and a conveying layer, a water outlet pipe is arranged in the conveying layer, and a water returning pipe is arranged at the top of the water outlet pipe; and a water pump is arranged on the surface of the water outlet pipe. According to the engine cover of the engine convenient to reduce noise and insulate heat, the problems that the engine is damaged caused by the fact that the engine is in a high temperature environment for a long time resulted from the fact that the engine cannot be cooled in time by an existing engine cover used for an excavator engine, and meanwhile noise is loud due to the fact that the noise of the engine cannot be absorbed are solved.

The invention provides a sound absorption and noise reduction compound device for an air purifier. A filter part and an impedance compound muffling part are sequentially arranged in the air flow direction. A first sound absorption shell is arranged on the side wall of the filter part. A first air inlet plate is arranged at the air inlet end of the filter part. A first filter layer, a fan and a second filter layer are sequentially arranged in the filter part in the air flow direction. A second air inlet plate is arranged between the filter part and the impedance compound muffling part. A secondsound absorption shell is arranged on the side wall of the impedance compound muffling part. A bell mouth is formed in the air outlet end of the impedance compound muffling part. A reactive muffler and a dissipative muffler are sequentially arranged in the impedance compound muffling part in the air flow direction. The invention further provides a method for air purification, sound absorption andnoise reduction. The sound absorption and noise reduction compound device for the air purifier can effectively combine the advantages of three muffling structures and realize ultra-quiet experience while maintaining large air volume air purification.

The invention belongs to the relevant technical field of mercury control in coal-fired flue gas, and discloses a rotational flow mercury adsorbent injection device. The device comprises a main injection barrel and two rotational flow impellers. The main injection barrel comprises a straight line section, a nozzle and a contraction section for connecting the straight line section with the nozzle. The contraction section is in a conical shape, the opening diameter of the end, connected with the straight line section, of the contraction section is larger than the opening diameter of the end, connected with the nozzle, of the contraction section, the two rotational flow impellers are stacked to the straight line section, air entering the straight line section form direct flow air and rotational flow air after passing through the rotational flow impellers, the direct flow air and the rotational flow air are mixed to drive a mercury adsorbent entering the containing cavity to enter the contraction section and accelerated through the contraction section and then enter the nozzle, and the nozzle is used for injecting the mercury adsorbent into a flue to be mixed with smoke gas in the flue for mercury adsorption and removal. The mixed gas is accelerated through the contraction section, the contact probability of the mercury adsorbent and smoke gas is increased, and the mercury adsorption efficiency is improved.

The invention provides rust removing equipment for machining. The rust removing equipment comprises a master control switch and a power plug. Four supporting columns are mounted on the outer wall of arust removing inner cylinder, and a feeding hole is formed in the top of the left side end face of the rust removing inner cylinder and communicates with the bottom of a feeding funnel; a discharginghole is formed in the bottom of the right side end face of the rust removing inner cylinder, a gate plate is mounted at the discharging hole, and one end of the gate plate is slidablyconnected with the interior of the rust removing inner cylinder; and a rust leaking hole is formed in the bottom of the rust removing inner cylinder and located in the top of a rust residue collecting drawer. Grinding balls and the outer walls of mechanical parts makes mutual friction advantageouslythrough rotating of a rust removing rotating cylinder, and rust contained in the exteriors of the mechanical parts is removed, so that the exteriors of the mechanical parts are smoother and cleaner, and the mechanical parts can conveniently assembled and used by people; the rust removing rotating cylinder is arranged obliquely so thatpeople can discharge the mechanical parts convenientlythrough rotating of the rust removing rotating cylinder, physical labor of people is reduced, and the working efficiency is promoted.

The invention discloses an elevated highway acoustic panel capable of disposing automobile tail gas. The elevated highway acoustic panel comprises a main frame and a nozzle. A load bearing base is fixedly installed below the main frame. Exhaust inlets are formed in the surface of the load bearing base. An air purifier is placed on the lower portion in the main frame. The upper portion of the air purifier is connected with an air pipe. A noise reduction device is installed on the middle portion in the main frame. Noise absorption openings are formed in the outer side of the noise reduction device. Impacting plates are arranged at the upper end and the lower end of the main frame. Damping springs are fixed to the connecting portions of the impacting plates and the surface of the main frame.Reflective strips are fixed between the noise absorption openings. The air purifier installed on the elevated highway acoustic panel capable of disposing the automobile tail gas can effectively reducenoise, meanwhile, the tail gas generated by automobiles on an elevated highway is sucked into the acoustic panel through the exhaust inlets to be filtered and purified, the filtered air is emitted through air outlets, so that the air quality is improved, tail gas pollution is effectively reduced, and the environment can be beautified.

The invention provides a heat dissipation structure for a driving device of a high precision computer numerical control (CNC) machine tool. The heat dissipation structure for the driving device of thehigh precision CNC machine tool comprises a mounting plate; and a heat conduction trough formed in the mounting plate. The heat dissipation structure for the driving device of the high precision CNCmachine tool has the beneficial effects that overheat operation of the CNC machine tool is avoided, and the damage phenomenon of the heat dissipation structure is reduced; the normal operation of theCNC machine tool is ensured; users can remove and install the heat dissipation structure conveniently, and deflection of the heat dissipation structure is avoided effectively; the stability and normaloperation of the heat dissipation structure are ensured, and the effects of silencing and noise reduction are good; good working environment is provided for staff, and the good working state of the staff is ensured; heat dissipation is accelerated, and dust is prevented from entering the heat dissipation structure and the driving device effectively; and the adaptability of the CNC machine tool isimproved, and meanwhile the repair and maintenance of the staff are reduced.

The invention provides an intelligent carpet control method, which is applied to the technical field of smart home control. The method comprises the steps of: starting an illumination detection device, and determining whether the received illumination intensity value is lower than a preset illumination intensity value or not; starting a pressure detection device to obtain a first pressure value ifthe received illumination intensity value is higher than a preset illumination intensity value; determining whether the obtained first pressure value is bigger than a first preset pressure value or not; and driving the light emitting device to emit light, if the detected first pressure value is bigger than the first preset pressure value. The invention further provides an intelligent carpet. According to the intelligent carpet and the control method thereof, an intelligent house device with low noise decibels, energy-saving, and convenient of use is provided by applying the embodiment of theinvention.

The invention discloses a traction motor cooling system by end wall air intake. Air inlet ducts are provided inside or at an outer end of a rail vehicle body. Air inlets are disposed at the top of the end wall and far from dust accumulated and worse environmental bottom of the vehicle body, so as to ensure inhalation of new air containing less impurity and reduce regular cleaning of an air channel and filtering parts. The cooling system mainly consists of the air inlet duct provided at the external end wall of the vehicle body, an exhausting duct connected with an underframe of the vehicle body and a centrifugal blower fan connecting to the air inlet duct and the exhausting duct. Air outlets of the exhausting duct are positioned above a traction motor. The air inlet duct is an end wall air inlet duct arranged at the external end wall of the vehicle body. The air inlets are disposed at top of the end wall. Thus the invention mainly utilizes a mode of air intake from the end wall of the vehicle body.

The present invention relates to an automobile tail gas back-combusting device, its technical contents include chemical change, physical change, mechanica, power and hydromechanics which are integrated into one body. The device mainly is formed from reaction tank, heat-radiation cooling box, expansion cracking chamber, active carbon filter, pressure booster, electric pump and safety air-changing valve. When it is used, it can be mounted in the bottom portion and tail portion of automobile, and can be connected into one body by means of tube. It can make tail gas obtain fuel combustion, and can completely remove harmful and toxic substances from tail gas so as to make the tail gas implement zero discharge.

The invention discloses a novel building wall body with fire prevention, heat preservation and noise reduction. The novel building wall body comprises bearing wall bodies, wherein noise reduction layers are arranged on one side of the bearing wall bodies, and reinforcing ribs are arranged between the noise reduction layers and the bearing wall bodies. A fireproof layer is arranged on one side of the noise reduction layers, placing cavities are formed in the fireproof layer, accommodating grooves are formed on the outer wall of the fireproof layer, and reinforcing frames are arranged between the adjacent accommodating grooves. The accommodating grooves are internally provided with isolation membranes, the placing cavities are internally provided with water storage bags, the water storage bags are internally provided with cooling water, and limiting cavities are formed between the cooling water and the water storage bags. According to the novel building wall body, by arranging the fireproof layer, when a fire occurs, the isolation membranes and the water storage bags are cracked by heating, the cooling water is discharged from the placing cavities through the accommodating grooves, and the bearing wall bodies and the noise reduction layers are cooled and soaked, the spread speed of the fire is reduced and the time for people to escape from the scene of the fire is extended.

The invention belongs to the field of generator unit assembly and unit installation, and particularly relates to a multiple damping base of a ship generator unit. The multiple damping base of the ship generator unit comprises a base; a supporting plate and a cover plate are orderly arranged on the base from bottom to top, damping devices are arranged on the lower part o the base, the middle between the base and the supporting plate and the upper part of the cover plate, so that the supporting plate, the cover plate and the damping devices are formed to be a multiple damping structure at the base. The supporting plate, the cover plate and the damping devices on the base can divide the damping devices into multiple layers to damp; and thereby, the mechanical vibration noise is reduced from 85 db in the past to 78 db below, the noise decibel is effectively reduced; the damping range reaches 5 mm above, and the service life of an electrical apparatus element on the unit is effectively prolonged.

The invention discloses a green mining device. The green mining device comprises a device body, a movable jaw plate and a fixed jaw plate are arranged on the back of the device body, a feeding port is formed in one side of the top end of the device body, a material guide plate is arranged on one side of the feeding port, through holes are evenly formed in the surface of the material guide plate, and a water pump is arranged in a box body. A water outlet of the water pump is connected with a water drainage pipe, an electromagnetic valve is arranged at the outer end of the water drainage pipe, the tail end of the water drainage pipe is connected with spray heads, the spray heads are opposite to the through holes in position, a water inlet pipe is connected to a water inlet of the water pump and extends out of the box body, and a cabinet body is arranged at the bottom of the box body and arranged on one side of the device body. A recycling bin is arranged in the cabinet body. According to the green mining device, by spraying and wetting the surfaces of stones before crushing, raised dust generated during crushing of the stones is reduced, meanwhile, the raised dust generated during discharging after crushing of the stones is sucked, so that the raised dust is collected in a dust filter bag.

The invention discloses a combined cutter which comprises a first blade and a second blade which operate alternatively. Sawteeth for scratching pipe fittings are arranged on the first blade. One end of the second blade is a cutting end for penetrating breakages of the pipe fittings and cutting off the pipe fittings. The cutting end is in the shape of a peach heart tip. The first blade is perpendicularly arranged while the second blade is horizontally arranged. Two blades are combined and cooperate with each other to cut off the pipe fittings, so that processing accuracy is improved, production cost is reduced, cutting-off time is shortened, pipe cutting noise is reduced, and generation of scrap iron during pipe cutting is reduced.

The invention discloses a mobile medical cart, and the medical cart comprises a base, a telescopic stand column, a workbench and an all-in-one computer. A pulley assembly is installed on the base, the telescopic stand column is arranged on the base, and the workbench and the all-in-one computer are arranged on the telescopic stand column. The telescopic stand column comprises a first telescopic section, a second telescopic section and a telescopic piece, a cavity is formed in the first telescopic section and the second telescopic section, the telescopic piece is arranged in the cavity, one end of the telescopic piece is connected with the first telescopic section, and the other end of the telescopic piece is connected with the second telescopic section. The telescopic piece drives the first telescopic section to stretch out or retract into the second telescopic section. The mobile medical cart provided by the invention is good in mute effect.

The invention discloses a low-noise belt transmission device. The low-noise belt transmission device comprises a driving shaft (1), a driving belt wheel (2), a drive shaft (3), a driven belt wheel (4), a V-shaped belt (5) and two belt wheel grooves (6), wherein the driving belt wheel (2) consists of a fixed half wheel (2a) and a movable half wheel (2b); the driven belt wheel (4) consists of a fixed half wheel (4a) and a movable half wheel (4b); a fixed half wheel (a) and a movable half wheel (b) are just in contact with each of two sides of the V-shaped belt (5). According to the low-noise belt transmission device, the friction force of the belt and the wheel grooves is alleviated by separating the assemble mode of the transmission belt wheel grooves (6); the noiseless property of the belt transmission device is improved; meanwhile, the surface roughness of the belt wheel grooves is set between 0.5 micron and 3.0 microns; the operation noise is lowered by reasonable reduction of the friction coefficient of the belt and the wheel grooves.

A brushless direct current motor comprises a casing (1), a front end cover (4), a rear end cover (5), a motor shaft (10), a rotor (11), permanent magnets (12), and stators (13). The motor shaft (10) is sleeved and connected in the casing (1). Two ends of the motor shaft (10) sleeve and are connected to the axes of the front end cover (4) and the rear end cover (5) through bearings (17) respectively. The front end cover (4) and the rear end cover (5) each have an inner side provided with a hollow extension portion. The hollow extension portions sleeve the motor shaft (10). A stator (13) sleeves and is connected to an outer wall of each hollow extension portion. Outer sides of two stators (13) are provided with the rotor (11). The rotor (11) between the two stators (13) is connected to the motor shaft (10). An inner wall of the rotor (11) is provided with the permanent magnets (12) opposite to the stators (13). The permanent magnets (12) opposite to the two stators (13) are disposed in a staggered manner.

The invention relates to a welding manipulator driving device, which belongs to the technical field of fluid braking devices. The welding manipulator driving device comprises an air cylinder, wherein the air cylinder is divided into a front cover, a cylinder body and a back cover, a piston cavity is formed in the cylinder body, a piston is installed in the piston cavity, a piston rod which is connected with the piston penetrates through the front cover, and a first air port is formed in the back cover. The welding manipulator driving device is characterized in that a hydraulic oil port which is communicated with the piston cavity is formed in the front cover, the hydraulic oil port is connected with the bottom of an oil tank outside the air cylinder through an oil inlet pipeline, and a speed regulating valve is installed on the oil inlet pipeline; hydraulic oil is contained in the oil tank, an air chamber is left in the upper part of the oil tank, and a second air port which is communicated with the air chamber is formed in the top of the oil tank. The welding manipulator driving device has the advantage of simple structure, only one oil tank needs to be arranged on the original air cylinder, and compared with an existing gas-liquid damping type air cylinder, the air cylinder is lower in the cost, but the problem of unstable output of the air cylinder can be solved.

The invention relates to a marine high-sound-insulation floating floor structure. The structure comprises a damping coating I arranged on a steel deck, and ceramic wool dividing strips which are arranged on the damping coating I and are close to a steel trunk bulkhead, a refractory deck dressing layer is arranged on the portion, between the ceramic wool dividing strips, of the damping coating I, arock wool board is arranged on the refractory deck dressing layer, a galvanized steel sheet I is arranged on the rock wool board, a damping coating II is arranged on the galvanized steel sheet I, a galvanized steel sheet II is arranged on the damping coating II, and the upper surface of the galvanized steel sheet II and the upper end faces of the ceramic wool dividing strips are at the same level. The structure is reasonable in structure arrangement, good in damping and noise reduction effect and high in resistance to deformation, and the fire rating reaches A-60 level.

The invention discloses a working-condition self-adaptive lifting and falling-prevention device of a scaffold. The working-condition self-adaptive lifting and falling-prevention device of the scaffold comprises a scaffold lifting mechanism, a lever type linkage mechanism and a falling-prevention mechanism, wherein the scaffold lifting mechanism, the linkage mechanism and the falling-prevention mechanism are arranged on a frame, a bolt hole which is connected with a scaffold frame is formed on the lower portion of the frame, the scaffold lifting mechanism is connected with the falling-prevention mechanism through the linkage mechanism, and the upper portion of the linkage mechanism is connected with an outer wall. The working-condition self-adaptive lifting and falling-prevention device of the scaffold has the advantages of well achieving purposes of normal lifting and falling-prevention due to the fact that an integrated drive system is formed by achieving the normal lifting function through the scaffold lifting mechanism, achieving real-time monitoring and transmission to a lifting state through the linkage mechanism and achieving the emergency-brake handling to sudden accidents through the falling-prevention mechanism; being skillful in design, convenient to install, safe and reliable, particularly suitable for the scaffold in the high-rise building construction and good in popularization and use value.