372 results about "Noise polution" patented technology

The invention provides an indoor noise elimination device. The indoor noise elimination device comprises a noise collector, a backward wave frequency transmitter and a controller. The noise collector is used for measuring the waveform and frequency of external noise in a preset direction and transmitting external noise collection signals. The backward wave frequency transmitter is used for attenuating or offsetting noise energy and can emit backward sound waves with the same frequency as the external noise in the direction opposite to the direction of the external noise, or can form a wave attenuating energy field region on a noise transmission channel, wherein the wave attenuating energy field region can prevent the external noise from entering a room. The controller is used for receiving the external noise collection signals and controlling the working status of the backward wave frequency transmitter according to the external noise waveform and frequency corresponding to the external noise collection signals. According to the indoor noise elimination device, the noise collector is used for measuring the external noise, and the controller is used for controlling the backward wave frequency transmitter to eliminate the noise, so that active elimination of the noise is achieved, the effect of noise elimination is improved, and the noise pollution is reduced.

The invention discloses a noise reduction and dust removal device for machining. The device comprises a machine body and is characterized in that a noise reduction layer matched with the machine bodyis arranged on the inner wall of the machine body, an air suction cover is arranged above a worktable in parallel, a negative pressure draught fan is connected with a collection box through an air outlet pipe, the collection box is located at the top end of a sound absorbing cover, and the other side of a connecting plate is provided with a cleaning brush. The device is novel in structure, and reasonable in design, through the worktable with a through hole, the air absorbing cover with a filter net and a sweep collection box with an electromagnet, the problem that sweep removal is not thoroughis effectively solved, through the cleaning brush, residual powdery sweeps can be thoroughly cleaned, machining environment can be improved, and machining quality of workpieces can be improved, through the sound absorbing cover made of a glass fiber sound absorbing cotton material and the noise reduction layer filled with flame retardant polyurethane, the noise pollution caused by work of the dust removal device can be reduced, and body health of workers can be facilitated.

An improved earbud design providing for full modularity; improved and variable hearing protection, sound quality, comfort, fit, aesthetics, and signal connectivity; and the ability to maintain environmental sound directionality comprised of a multitude of new features with variable vents and membranes which dilute the harmful pneumatic effects of sound while improving its acoustic quality. A location-based transmission system provides event attendees to mix live sound with streamed sound through Ambrose Earbuds for reduced hearing risk and no quality detriments due to timing gaps, occlusion or ear tip spectral broadening, and enables noise pollution-free musical performances. A displacement-based digital compression algorithm caps maximum output air displacement as well as sound pressure level. Thus, an earbud is provided that through adjustments and modularity can act as a personal listening device, a hearing protection device and as a personal aesthetic statement with customized fit and comfort.

The invention relates to the thick plate welding method, in particular to a non-back-gouging welding method for a T-shaped full penetration fillet weld of a crane girder thick plate. The non-back-gouging welding method includes: a enlarging a T-shaped weld groove of a crane girder to be 60 degrees and changing the angle formed by a ship-shaped support and the ground to be 34 degrees; and b placing a flame-retarding asbestos rope on one side of the T-shaped weld of the crane girder to serve as a liner, using a full-length flat bar to tightly press the asbestos rope and using a magnet to fix the full-length flat bar. The non-back-gouging welding method has the advantages of removing back gouging normally carried out for the T-shaped weld of the crane girder, saving time and improving efficiency; not using carbon arc air gouging bars and grinding sheets, simultaneously saving electric energy and cost; and reducing a large amount of noise pollution and providing a large improving space for ambient environment and physical and psychological health of constructors.

The invention discloses a device for abating offshore draught fan foundation piling noise. The device comprises a steel cofferdam, wherein the outer wall of the steel cofferdam is provided with a noise reduction wall, the inner wall of the steel cofferdam is provided with a rectangular tube with air pores, in the piling process, the compressed air is discharged through the air pores, multiple layers of air bubble curtains are formed between a steel tube pile and the steel cofferdam, and the noise in the piling process can be reduced by adopting the double means of the multiple layers of air bubble curtains and the noise reduction wall. The device is simple in structure, easy to realize and low in cost, the noise pollution in the offshore piling construction process can be effectively reduced, the ocean ecological system can be protected, and the balance of the novel energy development and the ecological environment can be maintained.

The invention discloses a prefabricated assembly type water tank and an assembly method, and belongs to the field of liquid storage tanks. The prefabricated assembled type water tank comprises a watertank bottom plate and prefabricated components arranged on the water tank bottom plate, wherein the prefabricated components comprise the plurality of groups of L-shaped components arranged on the water tank bottom plate and the vertical plate-type components arranged between the transversely adjacent L-shaped components; and connecting bolts are arranged between the L-shaped components and the vertical plate-type components. The prefabricated assembled type water tank absorbs the advantages of the assembly type construction technology to form a modular, standard and large-scale production technology and a standard assembling technology, under the condition of meeting a certain degree of strength, durability and stability, the construction period is shortened to the maximum extent, the construction efficiency is improved, the ecological environment is protected, and the noise pollution of a construction site is reduced; and meanwhile, the construction efficiency of the pre-drilling engineering is improved, and the problem that the construction period of the pre-drilling engineering is short for a long time is solved.

The invention discloses a device for preparing a gradient nanometer layer on the surface of a metal material by using rolling deformation. The device comprises a rotary working table, a hydraulic system and a roller pressure head, wherein the rotary working table comprises a motor, a base, a working table surface and a fixture; the motor is connected with the working table surface, and is used for driving the rotation of the working table surface; the hydraulic system comprises a hydraulic press, a power system and an electric control system; the roller pressure head comprises a pressure head base, and a rolling needle inlaid in the pressure head base; and the hydraulic press is used for driving the pressure head base and pressing the inlaid rolling needle in the surface of a metal material sample clamped on the fixture. The device has the advantages of easy operation, high safety, no noise pollution and high production efficiency; the treated metal material is uniformly deformed, and is smooth in surface; and the thickness and the crystal grain size of the gradient nanometer layer on the surface of the metal material can be controlled through adjusting such conditions as pressure value, treatment time and treatment temperature, so that the controllable preparation of the gradient nanometer layer is realized.

The invention discloses garden road construction equipment. The equipment structurally comprises a lithium battery assembly, a U-shaped armrest frame, a film covering frame, a curing film covering barrel, a bubble removing device, a flattening rod, an alloy vibration flattening rod and a vibrator, the film covering frame is vertically connected with the U-shaped armrest frame, and the lithium battery assembly is fixed on the U-shaped armrest frame. Compared with like equipment in the prior art, the equipment of the invention has the following advantages: the bubble removing device, the flattening rod, the alloy vibration flattening rod, the vibrator and other components are arranged in a combined manner, so a curing film can be transversely bulldozed firstly and then longitudinally pressed, air between the film and concrete can be exhausted and squeezed out, bubbles are avoided, the film can be well attached to the concrete, the film is prevented from being separated from the concrete,the surface of the concrete is prevented from cracking, and noise pollution can be avoided in the bulldozing process.

The invention discloses a sound insulation barrier for two sides of a road. The sound insulation barrier sequentially comprises a sound insulation plate, an inner plate and a protection plate in the thickness direction. The plate surface of the sound insulation plate is a slightly fluctuating wavy surface; sound absorption holes are uniformly formed in the wavy surface; the inner plate is of a grid structure formed by arranging a plurality of sets of unit pore plates in an array mode. A taper hole is formed in each unit pore plate; the unit pore plates are connected through wedge-shaped pipes,the wedge-shaped pipes are smoothly communicated with the conical surfaces of the conical holes, conical circular ring pieces with different widths are evenly distributed on the inner walls of the wedge-shaped pipes, a plurality of V-shaped notches are formed in the conical circular ring pieces along the inner rings, and wedge-shaped strips with the length equal to that of the wedge-shaped pipesare installed on the V-shaped notches; sound absorption cotton is filled between the unit pore plates, and a honeycomb pore type metal plate is tightly attached to the back face of the inner plate andfilled with the sound absorption cotton. Through the arrangement of the multiple layers of sound insulation structures, the silencing and noise reduction effects of the road can be greatly improved,and noise pollution to the life of residents is reduced.

The invention discloses a high-performance sound-absorbing damping soft porcelain decorative material and a preparation method thereof, and belongs to the field of novel building decorative materials.The high-performance sound-absorbing damping soft porcelain decorative material sequentially comprises a soft porcelain decoration surface layer, a sound-absorbing layer and a sound-insulating damping layer, wherein the soft porcelain decoration surface layer comprises the following components in parts by weight: 10-25 parts of silicone acrylic emulsion, 30-60 parts of quartz sand, 10-30 parts ofcement, 5-15 parts of a flame retardant, 0.5-2 parts of an inorganic pigment, 0.5-2 parts of a silane coupling agent and 10-25 parts of water, and the sound-absorbing layer and the sound-insulating damping layer respectively contain a sound-absorbing material and a sound-insulating material. According to the invention, the soft porcelain decoration surface layer is good in hydrophobicity and stain resistance, the sound-absorbing layer and the sound-insulating damping layer are obvious in noise reduction effect of, the decoration surface layer, the sound-absorbing layer and the sound-insulating damping layer are connected into a whole through slurry materials, and the prepared high-performance sound-absorbing damping soft porcelain decorative material has good flexibility and tensile resistance, has obvious sound-absorbing and noise-reducing effects, relieves the current noise pollution pressure in China, improves the living environment of people, and is an excellent building decorative material.

The invention discloses an orthopedic joint replacement surgery device. The orthopedic joint replacement surgery device comprises a bed board, wherein one side of the bed board is connected with a supporting table through a fixing bolt; guide rail grooves are symmetrically formed in the supporting table; sealing pipes are arranged in the guide rail grooves; piston blocks are slidably connected inthe sealing pipes; connecting rods are fixedly connected to the piston blocks; a plurality of permanent magnet sliding blocks are fixedly inserted into the connecting rods in a penetrating mode; the plurality of permanent magnet sliding blocks are arranged at equal intervals; a plurality of magnetic sliding sleeves are slidably connected to the sealing pipes in a sleeving mode; and the plurality of magnetic sliding sleeves correspond to the plurality of permanent magnet sliding blocks one by one. According to the orthopedic joint replacement surgery device, a piston plate slides up and down byrotating a current adjusting knob forwards and backwards, so that the magnetic sliding sleeves drive foot supporting pads to move leftwards and rightwards, after the adjustment is completed, only a valve needs to be closed, the current adjusting knob is rotated to enable an electromagnet to be powered off, then the angle of a joint can be maintained, the whole adjusting process is free of noise pollution, the reaction is rapid, and unnecessary operation idle time is saved.

The invention provides a mechanical pump noise reducing device for reducing noise of a mechanical pump therein. The device comprises a first shell, a first silencing foam, an intake port fan, an intake port secondary silencing cover, an exhaust port fan, and an exhaust port secondary silencing cover, wherein the first shell is respectively provided with an intake joint and an exhaust joint connected with an intake pipeline and an exhaust pipeline of the mechanical pump, and an intake port and an exhaust port respectively formed in two opposite side walls of the first shell; the first silencing foam is arranged on the inner surface of the first shell; the intake port fan is mounted in the intake port; the intake port secondary silencing cover wraps the intake port fan, and is provided with an intake channel; the exhaust port fan is mounted in the exhaust port; and the exhaust port secondary silencing cover wraps the exhaust port fan, and is provided with an exhaust channel. The mechanical pump noise reducing device solves the problem of secondary noise pollution generated by installation of the fan in a traditional mechanical pump.

The invention relates to a water jet cutting device for repairing craters in an airport runway. The water jet cutting device comprises a cutting system, a sand supply system, a pressurization system and an auxiliary system, wherein the cutting system is provided with a high-pressure water sprayer, the sand supply system is provided with a sand storage tank, the pressurization system is provided with a reciprocating type pressurizer, and the auxiliary system is provided with a water energy accumulator; the two ends of the reciprocating type pressurizer of the pressurization system are connected to one end of the water energy accumulator of the auxiliary system through pipelines, and the other end of the water energy accumulator is connected with the high-pressure water inlet of the high-pressure water sprayer through a pipeline; the sand storage tank of the sand supply system is connected with the sand inlet of the high-pressure water sprayer through a pipeline. The water jet cutting device has the advantages that the cutting speed of the water jet cutting device is superior to that of a conventional mechanical cutting machine; as the water cutting ability is concentrated, the impact on the road surface is small, the cutting quality is superior to that of a mechanical cutting technology, and the locking phenomenon cannot occur; in the cutting process, the depth feeding is not needed, and the cutting straightness does not need to be ensured; as cutting media are water and abrasive materials, no damage phenomenon of cutters during cutting exists, the cost is low, and no dust and noise pollution exist.

The embodiment of the invention provides a charging pile cooling method. The method comprises the following steps: determining a first preset noise value according to a first preset period; and determining the first speed of the charging pile fan according to the first preset noise value. According to the method provided by the embodiment of the invention, the noise pollution to the surrounding environment during the operation of the fan of the charging pile can be reduced while the efficient cooling of the charging pile is maintained.

The invention provides a drill barrel structure of a rotary drilling rig. A piston, a pressing rod and a lock hook are installed in a drill barrel, a push rod and a rack push rod are installed at thetop of the drill barrel, a power pressing disc makes contact with the rack push rod firstly during soil unloading, and the lock hook is driven to rotate through the rack push rod, a linkage assembly and the pressing rod so as to control a bin door on the drill barrel to be opened and closed; and then the power pressing disc makes contact with the push rod, and the piston is driven to move throughthe push rod so as to push soil in the drill barrel to enable the soil to fall off from the drill barrel. According to the drill barrel structure of the rotary drilling rig, the soil unloading qualityand the soil unloading working efficiency can be effectively improved, and automatic opening and closing of the bin door are achieved; and the rotary drilling rig does not need to unload the soil through shaking, so that noise pollution is greatly reduced, the phenomena of damage to health of constructors and noise disturbing are avoided, meanwhile, auxiliary personnel do not need to be arrangedto knock the drill barrel or open and close the bin door, and personnel waste caused by knocking of the drill barrel or opening and closing of the bin door is avoided.

The invention belongs to the field of terminals and discloses an ultra-silent terminal. The ultra-silent terminal comprises a rack, the rack portion of the terminal is made of imported high-quality steel plates through splicing, the rack is provided with a terminal stamping device and an automatic feeding device, and the terminal stamping device is further provided with a variable frequency controller which is connected with a counter. According to the ultra-silent terminal, the variable frequency controller is adopted, and a motor rotates when stepped, so that electricity is saved, and noise pollution is avoided; the sound is small during terminal stamping, mold adjustment is convenient, the running speed of the terminal can be adjusted, and the amount of stamped terminals can be known clearly due to a counting function; and the continuous terminal stamping function is provided, the amount of terminals to be stamped is set, terminals can be stamped continuously at intervals, automatic feeding is achieved, and the use is safe and convenient.

The invention aims to provide a wall-hanged air conditioner capable of saving space, reducing energy consumption, improving the energy conversion efficiency and controlling the temperature. The wall-hanged air conditioner can realize the temperature control on the wall body. The temperature difference indoor and outdoor can be solved by using the wall-hanged air conditioner without depending on a compressor air conditioner. The wall-hanged air conditioner can save the building space, has no noise pollution and high energy conversion rate and can be applied on the building which can be really called as green building. The theory base is Peltier effect and Seebeck effect structure. The invention has the following characteristics that: firstly, an inner wall surface and an outer wall surface are heat transfer bodies generally called as heat radiators and made of a material with better heat transfer performance; secondly, an intermediate interlayer is a heat insulator made of an insulated heat-preservation material without heat transfer; thirdly, a key energy source conversion element is a temperature difference refrigerating element and can work after connecting to a direct current power source according to the requirement; and fourthly, the invention can work in a cascade way and is modularly combined.

The invention discloses a noise reduction device of an air compressor. The noise reduction device comprises a noise reduction base, wherein the air compressor is installed at the upper end of the noise reduction base; buffer noise reduction structures are uniformly distributed on the left side and the right side of the upper end of the noise reduction base in the front-rear direction; first soundabsorption cotton is installed on the buffer noise reduction structures; a connecting plate is installed at the upper end of each buffer noise reduction structure; a storage structure is slidably connected between the connecting plates at the two sides; second sound absorption cotton is slidably installed in the storage structure; and a hand pulling assembly is installed at the rear end of the noise reduction base. According to the noise reduction device, triple noise reduction can be achieved through the joint cooperation of the noise reduction base, the buffer noise reduction structures, thefirst sound absorption cotton and the second sound absorption cotton, so that the noise pollution generated when the air compressor works is greatly reduced, and the working environment is optimized.

The invention relates to the technical field of air conditioner installation, in particular to a central air conditioner installation fixing device and an installation method. The installation methodcomprises the steps that a supporting piece, installation pieces and a positioning piece are arranged, the supporting piece is installed on a wall body, the two installation pieces are rotationally installed on the two sides, adjacent to the wall body, of the supporting piece, the two installation pieces are both provided with abutting assemblies for abutting against and fixing an air conditioneroutdoor unit, the positioning piece is arranged at the top of the supporting piece in a sliding mode, and the supporting piece is provided with a sliding piece for driving the positioning piece to move in the direction close to or away from the wall body. The central air conditioner installation fixing device and the installation method have the effects that the air conditioner outdoor unit can beconveniently and stably fixed and sealed, noise pollution caused by vibration of the air conditioner outdoor unit is reduced, and therefore energy conservation and environment protection are better achieved.

The invention discloses a noise reducing dust collector, and belongs to the technical field of dust collectors. The bottom of a dust collection upper cover is connected to the top of a dust collectiondrum, and exhaust holes are kept in the top of the dust collection upper cover; a motor bracket is arranged in an inner cavity in the top of the dust collection upper cover; a motor protective housing is arranged at the top of the motor bracket; a motor is arranged in an inner cavity of the protective housing; and a motor rotating shaft is arranged at a bottom power end of the motor via a coupling. In a running process of the device (the dust collector), vibration, which is generated from the motor in a running process can be effectively relieved through stress springs and arc-shaped rubber protective plate sheets which are mutually cooperated in use; via motor silencing sheets, noise generated in running of the motor can be absorbed, and via fan silencing sheets, noise generated from a rotating process of turbine blades can be effectively absorbed; and noise generated in a running process of interior can be isolated via a sealing sound-insulating device of the dust collection upper cover, so that noise is reduced, and influence of noise pollution to surrounding environment is avoided.

The invention relates to a super-hydrophobic self-luminous sound insulation screen and a preparation method thereof. The super-hydrophobic self-luminous sound insulation screen comprises a sound insulation screen and a super-hydrophobic layer, the surface of the sound insulation screen is coated with the super-hydrophobic layer, the sound insulation screen comprises polycarbonate resin, luminescent powder, reflective powder, kaolin, a water reducing agent and water, and the luminescent powder is K2SiF6: Mn < 4 + >. The sound insulation screen comprises 900 parts of polycarbonate resin, 75-80 parts of the luminescent powder, 30-40 parts of the reflective powder, 15-20 parts of the kaolin, 10 parts of the naphthalene water reducer and 50 parts of the water. Not only can noise pollution to surrounding residents be effectively reduced, but also self-illumination can be achieved for a period of time after sunlight and illumination of an automobile lamp are absorbed, the visual effect is obvious, lamplight illumination is reduced, and energy conservation and emission reduction are achieved.

The invention relates to the technical field of noise reduction of an air conditioner, and particularly discloses a noise elimination and sound insulation device for an outdoor unit of an air conditioner. The noise elimination and sound insulation device for the outdoor unit of the air conditioner comprises a cover body covering the outdoor unit of the air conditioner, wherein an air inlet and anair outlet are arranged on the cover body, the air inlet is far away from the air outlet, and the air inlet is lower than the air outlet; a first space and a second space which are used for separatingthe space around the outdoor unit of the air conditioner are arranged in the cover body, the air inlet end of the first space communicates with the air inlet of the cover body, and the air outlet endof the first space communicates with the air inlet end of an air inlet grille of the outdoor unit of the air conditioner; the air inlet end of the second space communicates with the air outlet end ofa cooling fan of the outdoor unit of the air conditioner, and the air outlet end of the second space communicates with the air outlet of the cover body; and an air inlet silencing assembly is arranged in the first space, and an air outlet silencing assembly is arranged in the second space. The scheme provided by the invention is used for solving the problems that in the prior art, the quality ofa sound environment where people live is reduced due to noise pollution caused by the operation of an outdoor unit of an air conditioner, and the normal sleep and rest of the people are seriously affected.

The invention discloses a bridge deck pavement structure. A bonding layer (1), a cast-in-place layer (2), a waterproof layer (3) and a bridge deck pavement layer (4) are sequentially paved on the bridge deck pavement structure from bottom to top, a carbon fiber heating unit (5) is arranged in the bonding layer (1) in a buried mode, and the bonding layer is prepared from a thermoplastic polymer material, a curing agent and an aggregate. By using the prepared bridge deck pavement structure, a large amount of operation for chiseling away a concrete cast-in-place layer can be omitted, the problem that a main beam structure is damaged in the chiseling process is solved, the noise pollution and the water pollution in the chiseling construction are avoided, and the bridge deck pavement structure has good application and popularization values.

The invention discloses a noise alarm prompting apparatus and system. The noise alarm prompting apparatus comprises a box body, a sound intensity sensor, an operation amplification circuit, a main controller, a plurality of relay devices and a plurality of alarm indicating lamps, wherein the operation amplification circuit is connected between the sound intensity sensor and the main controller, and the plurality of relay devices are correspondingly connected between the main controller and the plurality of alarm indicating lamps. The beneficial effects of the noise alarm prompting apparatus and system are that the noise alarm prompting apparatus is mounted in a ward; when a decibel value of sound in the ward is in preset value scopes of different intensities, the plurality of alarm indicating lamps correspondingly display different lamp light colors, sound generating persons can be warned to pay attention to sound volume while speaking, and patients who need rest in the ward can be prevented from being disturbed by noise pollution; when speakers see the alarm indicating lamps, the speakers can be helped to determine the sound volume thereof according to whether the different alarmindicating lamps are turned on or not; the speakers can be indirectly urged to lower the sound volume to below a given decibel value in a self-conscious manner, and therefore the noise alarm promptingapparatus and system are good in utilization effects.