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114results about How to "Reduce noise pollution" patented technology

Integrated assembly type steel structure building

The invention provides an integrated assembly type steel structure building. The integrated assembly type steel structure building comprises a main body framework, floor bearing plates, internal wall bearing plates, external wall bearing plates and a roof; the floor bearing plates, the internal wall bearing plates, the external wall bearing plates and the roof are connected with the main body framework through connecting parts, the internal wall bearing plates are arranged to be adjacent to the external wall bearing plates, the roof is arranged at the upper end of the main body framework, and the outer surfaces of the internal wall bearing plates, the outer surfaces of the external wall bearing plates and the outer surface of the roof are each provided with decoration and fitment plates in an integrated mode, and the interiors of the decoration and fitment plates are correspondingly provided with cable conduits and water pipes in an integrated mode. In this way, the integrated assembly type steel structure building has the advantages of being stronger in integrity, convenient to construct, high in repeating utilization rate, capable of reducing production cost and wide in application range, and integral installation and disassembly of prefabricated part and the connecting parts in a factory can be achieved; meanwhile, large-scale production at a construction site is easy to achieve, and construction waste is greatly reduced.
Owner:CHINA CONSTR STEEL STRUCTURE CORP LTD

Anti-seismic and noise-reduction electrical control cabinet

The invention discloses an anti-seismic and sound-absorbing electrical control cabinet, which comprises an outer shell and an inner shell. The bottom of the outer shell is provided with a base and an adjustment groove. The base is provided with a moving mechanism. Adjusting the threaded hole, a buffer mechanism is provided in the adjusting groove, and a pressing mechanism is provided in the adjusting threaded hole; the buffering mechanism includes a fixed column, a sliding column and a second spring, and a right-angle stop is provided on the sliding column. plate, the fixed column is provided with a clamping plate, and the fixed column is provided with a fixed nut; the pressing mechanism includes a pressing column and an elastic pad, and the pressing column is provided with a bolt, and the bolt is provided with a There are locking nuts; sound insulation cotton is arranged between the inner shell and the outer shell. The device adopts a double-layer cabinet, and the inner shell is buffered and protected by the buffer mechanism and the pressing mechanism between the outer shell and the inner shell. The buffer effect is good, the adaptability is strong, and the inner shell of different sizes can be installed. Adapt to different vibration environments.
Owner:潘承燕

Silencing tire cover for carriage noise avoidance

The invention discloses an automobile silencing tire cover which comprises a stopping blade plate and a mud guard installed on the stopping blade plate. The automobile silencing tire cover further comprises a silencing layer arranged between the mud guard and the stopping blade plate and positioned on the inner side of the stopping blade plate, the contour of the silencing layer is a wave-shaped surface, the wave shape comprises crests and troughs which are alternately arranged along the cambered surface of the inner side of the stopping blade plate in a space, a contour wall of the silencing layer is subject to rough treatment, a cavity is formed between the contour wall of the silencing layer and the mud guard, a plurality of silencing holes are distributed in slope surfaces between the crests and the troughs of the silencing layer, and a sound absorption coating is arranged inside the contour wall of the silencing layer. In sound wave contrast tests of the silencing tire cover for carriage noise avoidance, the average noise reduction effect measured inside a carriage is 6.5 dB, the tire noise is reduced from the aspect of the transmission route of the tire noise, noise pollution inside the carriage can be obviously reduced particularly in the silencing direction, and the use feeling is improved.
Owner:CHENGDU LINGCHUAN SPECIAL IND

Small concrete compaction and curing slowing device used for experiment and its implementation method

The invention relates to a small concrete compaction and curing slowing device used for an experiment. The device includes a vibration mechanism, a centrifugal mechanism, a curing slowing mechanism, amaterial loading and unloading mechanism and a clamping mechanism; the vibration mechanism is located on the outermost layer of the device, the centrifugal mechanism is located on the middle layer ofthe device, the curing slowing mechanism is located on the secondary inner layer of the device, and the material loading and unloading mechanism is located on the innermost layer of the device. The invention further discloses a concrete compaction and curing slowing method by means of the concrete compaction and curing slowing device. According to the small concrete compaction and curing slowingdevice used for experiment and its implementation method, solid compaction and curing slowing functions are both achieved, there is a big difference between the existing experimental method and corresponding instruments and the small concrete compaction and curing slowing device and its implementation method, the characteristics such as low noise, low loss, low splashing, disassembly, matching, uniform sample discharge and compaction in the compaction process of concrete are taken into consideration, and the device is very high in feasibility and practicability.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

Sound-reducing electric drill

The invention discloses a sound-reducing electric drill. The sound-reducing electric drill comprises a drill bit, an electric drill, a handlebar and a handle which are connected in order; the upper part of the electric drill is equipped with a blocking opening, and the middle part of the electric drill is equipped with an upper handle and a lower handle; the upper handle and the lower handle are fixed on an outer layer cover, and an inner layer cover places in the outer layer cover; the inner layer cover sleeves on the outer shell of the electric drill; the middle part of the outer layer cover and the inner layer cover is provided with an anti-shock strip, the left bottom parts of the outer layer cover and the inner layer cover are fixed with suction disks, and the suction disks are sucked on the wall. Two covers of the outer layer cover and the inner layer cover adopt a double-layered structure, and the middle of the double layers is hollow, and the outer layer cover and the inner layer cover are made of stainless steel and in the shape of round; the anti-shock strip is made of sponge material. The sound-reducing electric drill coats the drill bit part of the electric drill by the outer layer cover and the inner layer cover, and the anti-shock strip is placed in the middle of two layers; the handle is installed on the outer layer cover, and noise of the electric drill can be reduced in use by pressing the handle on the outer layer cover and fixing the suction disks on the wall; and thereby, the noise pollution for house decoration is reduced, and people cannot be troubled by noise of house decoration.
Owner:张宇

Electric sanitation garbage truck with low noise

The invention relates to the technical field of sanitation garbage trucks, and discloses the electric sanitation garbage truck with low noise. The electric sanitation garbage truck comprises a truck body, a feeding hole is formed in an inclined surface of the left side surface of the truck body, a cushion base and a guide rail are fixedly installed on the inclined surface of the left side surfaceof the truck body, the top of the cushion base is fixedly provided with a hook, the top of the guide rail is movably connected with a support through a sliding block, the left end of the support is provided with a fixing frame in a hinged mode through a pin bolt, two symmetric springs are fixedly installed on the inner ring of the fixing frame, a semicircular clamping plate is fixedly installed atone ends, far away from the fixing frame, of the springs, a pull rod is fixedly connected to the outer surface of the semicircular clamping plate, and one end, away from the semicircular clamping plate, of the pull rod penetrates through and extends to the upper part of the fixing frame. According to the electric sanitation garbage truck, the problem that an existing sanitation garbage truck is powered through a diesel engine, and when garbage is cleaned, the noise is large and a garbage can is easily damaged is solved, so that the effects that the noise is low and the garbage can is protected when the garbage can is dumped are achieved and the service life of the garbage can is guaranteed.
Owner:安徽省皖工电动车科技有限公司

End cover for permanent magnet synchronous slowdown motor

The invention relates to an end cover for a permanent magnet synchronous slowdown motor, comprising a cover body, wherein a damping ring is arranged on one side of the cover body; a limiting block isevenly arranged on one side of the inner wall of the damping ring; the limiting block is connected with a bulge through a limiting slot; a sound-absorbing panel is fixed on one side of the cover body,and the inner cavity of the bulge is connected with the sound-absorbing panel; sound-absorbing holes are uniformly formed on one side of the sound-absorbing panel; the inner cavity of the sound-absorbing panel is connected with a heat dissipation panel through a connecting member; heat dissipation holes are evenly formed on one side of the heat dissipation panel; the inner cavity of the heat dissipation hole is connected with a first filtering panel; the inner cavity of the heat dissipation panel is connected with an annular cavity, and one side of the annular cavity is provided with a bearing passage; the inner cavity of the bearing passage is in threaded connection with a shaft sleeve; mounting pieces are connected on the periphery of the cover body; a damping pad is arranged at one side of each mounting piece; a mounting hole is formed on the inner cavity of the mounting piece; and ventilation holes are formed uniformly on the surface of the cover body. The end cover in the invention has good heat dissipation performance, noise absorption performance and shock absorption performance and improves the service life of the motor.
Owner:JIANGSU WINCAP NEW ENERGY TECH CO LTD

Internal noise source identification method of waste heat boiler

InactiveCN103745037AReduce noise pollutionReduce noise reduction costsSpecial data processing applicationsInternal noiseSuperheater
The invention discloses an internal noise source identification method of a waste heat boiler. The method comprises S1, establishing a bare tube two-dimensional model, separately simulating the flow field and the sound field of the bare tubes under two tube arrays of a high-pressure superheater and a deaerating evaporator, calculating segment characteristic frequency and estimating the integral characteristic frequency range inside the boiler; S2, establishing a finned tube finite element model, separately simulating the flow field and the sound field of a single pipe of finned pipes under the two tube arrays of the high-pressure super heater and the deaerating evaporator and calculating segment characteristic frequency to estimate the integral characteristic frequency range inside the boiler; S3, correcting the characteristic frequency of the tube arrays; S4, calculating normal frequency and determining whether to excite the normal frequency to generate sound chamber resonance; S5, calculating the sound transmission losses and the sound insulation of the boiler to be combined with actually-measured data to obtain total boiler internal noise; S6, calculating the contribution of different types of noise to the boiler internal noise to determine the main noise source of the boiler internal noise. The internal noise source identification method of the waste heat boiler can help identify the internal noise source of the waste heat boiler accurately.
Owner:HUADIAN HEAVY IND CO LTD

Sound-isolating screen for urban roads and bridges

The invention discloses a sound-isolating screen for urban roads and bridges. The sound-isolating screen comprises a sound-isolating screen main body, wherein the sound-isolating screen main body is composed of a dustproof plate arranged at the top of the sound-isolating screen main body and a sound-isolating plate arranged at the bottom of the dustproof plate; and the dustproof plate is welded with the sound-isolating plate. According to the sound-isolating screen, a damping plate is arranged on the sound-isolating screen for urban roads and bridges; the physical isolation is achieved while the noise spread is stopped; the soundproof effect is excellent and the noise pollution is effectively reduced; the raw materials are capable of effectively retarding flame and preventing the fire spread, so that the safety is higher; the raw materials are also effective anticorrosion, so that the service life of the sound-isolating screen is prolonged; a transparent plate is arranged, the light transmittance is promoted in a visual road section and the lighting effect is excellent, so that the traffic accident caused by unclear sight of the driver can be avoided; and a spring bumper is arranged, so that the collision of the vehicle to the sound-isolating screen can be effectively relieved, the sound-isolating screen can be prevented from being damaged and the safety of the sound-isolating screen and the driver can be effectively guaranteed.
Owner:WEIFANG HUAGUANG DIGITAL EQUIP

Pilot-operated type overflow valve with pressure resisting function

The invention discloses a pilot-operated type overflow valve with a pressure resisting function. The pilot-operated type overflow valve comprises an oil inlet, an oil outlet, a main valve seat, a main valve element, a damping hole, a valve body, a main valve spring, a valve deck, a remote control port, a pilot-operated valve seat, a pressure adjusting spring, an adjusting screw and a pressure adjusting hand wheel. The valve body is provided with the oil inlet. The oil outlet is formed in the lower end of the valve body. The main valve seat is arranged at the upper end of the oil outlet. The main valve element is arranged at the upper left end of the main valve seat. The main valve spring is arranged at the upper end of the main valve seat. The damping hole is formed in the upper right end of the main valve seat. The valve deck is arranged at the upper end of the valve body. The remote control port is formed in the upper end of the valve deck. The pressure adjusting hand wheel is arranged at the upper left end of the valve body. The adjusting screw is fixed to the right end of the pressure adjusting hand wheel. The pressure adjusting spring is arranged at the right end of the adjusting screw. The pilot-operated valve seat is arranged at the right end of the pressure adjusting spring. The pilot-operated type overflow valve has the beneficial effects that the damping effect is good, noise is low, the pressure adjusting range is wide, and actions are sensitive.
Owner:GUANGXI OUXUN TECH SERVICE CO LTD

Automatic control dispersing valve

The invention discloses an automatic control dispersing valve which comprises a shell. A feeding end is arranged at the top of the shell. One end of the feeding end is in interference connection with an end cover. A feeding pipe is connected below the feeding end. The feeding pipe extends out of the outer wall of the shell. A valve element is connected to the inner wall of the feeding pipe. The valve element is a cylinder, and a through hole is formed in the axis of the valve element. According to the automatic control dispersing valve, an air pump is used for inflating an air cylinder to serve as power, the linear reciprocating movement of the air cylinder is converted into one-direction intermittent rotation of a pawl, the pawl pushes a ratchet wheel to rotate, the ratchet wheel is connected with the valve element, and therefore the position of the through hole in the valve element is adjusted to achieve feeding and feeding closing. According to the design, the structure is reasonable and simple, noise pollution is lowered, meanwhile, electric power serves as cleaning energy, secondary pollution caused by using a diesel engine and a gasoline engine is avoided, a pressure sensor and a control panel are matched with an air pump, automatic control can be achieved through the arrangement of the control panel, operation is simple and convenient, the manufacturing cost is greatly lowered, great practicability is achieved, and popularization is easy.
Owner:SHANDONG UNIV OF TECH

Energy-saving coach and coach body covering method

InactiveCN102602458AReduce noise pollutionGood for physical and mental healthSuperstructure subunitsVehiclesMental healthNoise pollution
The invention discloses an energy-saving coach and a coach body covering method. The energy-saving coach comprises a coach body framework and panels, wherein the panels include the first layer of panel and the second layer of panel. The first layer of panel is adhered on the coach body framework through four-proofing adhesives and rivets, and the second layer of panel is adhered with heat-insulation materials through four-proofing adhesives and is further fixed on the first layer of panel through pressing strips. The coach body covering method includes the following steps of A, primarily covering; B, secondarily covering and heat insulating; and C, adhering the heat-insulation materials to a covered layer subjected to the primary covering and fixing by the pressing strips. The energy-saving coach and the coach body covering method have the following advantages that the panels are adhered on the coach body framework, resonance noise of the coach body at the four-proofing adhesive position of the coach body framework is reduced greatly, noise pollution of the coach is effectively reduced and physical and mental health of drivers and passengers are benefited. Besides, the coach body is coated by the heat-insulation materials, cool air in the coach body can be kept for a long time, the air conditioning system can be saved and energy consumption is reduced accordingly.
Owner:深圳汇百通汽车集团有限公司

Drilling device for sand cleaning and sand cleaning method

The invention provides a novel sand removing method and device. The device comprises a drilling device for sand cleaning and a dust collecting system based on the rotating cutting and crushing principle and the Bernoulli principle. The drilling device mainly comprises a drill bit, a rotating rod and a three-way communicating pipe, wherein the drill bit is connected with the rotating rod, and the rotating rod is used for exerting rotating cutting force on the drill bit to which the drill bit belongs; and the rotating rod connected with the drill bit sleeves the dust suction end of the three-waycommunicating pipe, and the rotating rod is provided with a gap in the dust collecting end of the three-way communicating pipe, so that dust can be prevented from passing through the dust collectingend; the rotating rod is connected with a power source, and the rotating power is provided; and the end a in the other two ends of the three-way communicating pipe is an air inlet end, and the end b is an air outlet end; and a negative pressure is formed at the dust suction end of the three-way communicating pipe when the gas flows from the air inlet end to the air outlet end at a high speed, andthe dust generated by rotary cutting of the dust suction end drill bit is sucked into and enters the dust collecting system from the air outlet end in the flowing direction of the gas. The method aimsto solve the problem of difficulty in sand cleaning in the existing casting production post-treatment process, dust pollution, high noise pollution and the like are solved; and a new method is provided for solving the problems of large dust pollution, large noise pollution and the like.
Owner:SHANGHAI SPACE PRECISION MACHINERY RES INST

Protective cover of high-voltage electric cabinet

The invention belongs to the technical field of electric cabinet protection devices, and in particular relates to a protective cover of a high-voltage electric cabinet. The protective cover of the high-voltage electric cabinet comprises a base, a cover body and a cabinet body; the cover body is put on the base; the cabinet body is installed in the cover body; a shock absorption box is fixedly installed on the base; a support plate in the horizontal direction is arranged in the shock absorption box; multiple first springs in the vertical direction are fixedly connected to the lower surface of the support plate; the bottoms of the first springs are fixedly connected with the inner wall of the shock absorption box; multiple support rods in the vertical direction are fixedly connected to the upper surfaces of the support plate; the tops of the support rods extend to outside of the shock absorption box; the tops of the support rods are fixedly connected to a placement plate in the horizontal direction; the cabinet body is fixedly installed on the placement plate; both two inner side walls of the cover body are each provided with a limiting base; disadvantages in the prior art are overcome; shock of the electric cabinet is absorbed; noise pollution generated by the electric cabinet is reduced; and the protective cover is arranged, so that protection and sound insulation are providedfor the electric cabinet.
Owner:合肥智鼎电控自动化科技有限公司

Embedded composite damping structure and construction method thereof

The invention discloses an embedded composite damping structure. The embedded composite damping structure comprises a multi-layer damping structure body, a reinforcement concrete layer and a viscoelastic damping layer II, wherein the multi-layer damping structure body is located in a groove, and the reinforcement concrete layer is located on the side wall and the bottom surface of the groove. The viscoelastic damping layer II is located between the reinforcement concrete layer and the multi-layer damping structure body. The multi-layer damping structure body comprises restraint layers and viscoelastic damping layers I, wherein each viscoelastic damping layer I is arranged between the two corresponding adjacent restraint layers. According to the embedded composite damping structure, a restraining and damping structural unit is formed by every two adjacent restraint layers and the damping layer I between the two restraint layers, and the multiple restraining and damping structural units are overlapped to form the multi-layer damping structure body aiming at vibration in the vertical direction; a restraining and damping structure aiming at vibration in the horizontal direction is formed through the reinforcement concrete layer, the multi-restraint damping structure body and the side walls of the damping layer II between the reinforcement concrete layer and the multi-restraint damping structure body. A composite restraining and damping shock absorption system is formed by combining the restraining and damping structures, and thus vibration which is transmitted to a target building by a rock soil body can be effectively reduced both in the horizontal direction and the vertical direction.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY

Gasoline engine exhaust silencer composed of porous pipes

PendingCN108278141ASoft and steady soundReduce noise pollutionSilencing apparatusMachines/enginesNoise pollutionPorous pipe
The invention provides a gasoline engine exhaust silencer composed of porous pipes. The gasoline engine exhaust silencer comprises a front end cover, an outer barrel body, a tail cover and a tail pipewhich are connected in sequence. The gasoline engine exhaust silencer further comprises a silencing assembly arranged inside the outer barrel body. The silencing assembly comprises the first porous pipe, the second porous pipe and the glass fiber supporting porous pipe. The pipe wall of the first porous pipe is provided with a plurality of first silencing holes, and the first porous pipe is arranged in the second porous pipe. The pipe wall of the second porous pipe is provided with a plurality of second silencing holes. The pipe wall of the glass fiber supporting porous pipe is provided witha plurality of first sound absorption holes. A glass fiber layer is arranged between the glass fiber supporting porous pipe and the outer barrel body. A glass fiber layer is arranged inside the tail cover. The end face, facing towards the interior of the outer barrel body, of the tail cover is provided with a plurality of second sound absorption holes. The silencing effect and silencing performance are good so as to reduce noise pollution caused by operation of a gasoline engine, and the gasoline engine is large in largest power, high in highest speed and small in power loss.
Owner:陈秀祯

Noise reduction and cutting device capable of adjusting length of steel bars

The invention discloses a noise reduction and cutting device capable of adjusting the length of steel bars. The noise reduction and cutting device comprises an upper fixed plate, a lower fixed plate,clamping rods, guide carrier rollers, a rotating disc, noise reduction devices and a cutting device. The two sides of the upper surface of the lower fixed plate are in bolted connection with the clamping rods. A rotating shaft penetrates the circle center position of each guide carrier roller. The clamping rods are connected to the rotating shafts. Side plates are arranged on the inner walls of the two sides of each noise reduction protection cover. A wood-wool plate layer is closely attached to the inner wall of each noise reduction protection cover. A PET plastic layer located on the outer side is bonded to the inner wall of each wood-wool plate layer through inorganic glue. A high-temperature rock wool plate layer is bonded to the inner wall of each PET plastic layer located on the inner side. A sound absorption sponge layer is arranged on the inner wall of each high-temperature rock wool plate layer. Hollow pipes are evenly arranged on the inner surface of each sound absorption sponge layer at intervals. An adjusting rod is fixedly connected to the middle end of the upper fixed plate. A cutting blade is connected to an output shaft of a cutting motor. A scrap collection box isarranged at the position, under the cutting blade, of the lower fixed plate. Bases are fixedly connected to the lower surface of a lower fixed block.
Owner:NANAN CHUANGPEI ELECTRONICS TECH CO LTD
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