61 results about "Noise pollution" patented technology

The utility model provides a kind of sound insulation and noise reduction composite air pipe structure, it is related to composite air pipe technical field, including composite air pipe assembly, sound insulation component is provided on the composite air pipe assembly, the side of the composite air pipe assembly is provided with mounting assembly, the composite air pipe assembly includes air pipe main body and protective support cover.The utility model is by sound absorption box and is set in the inside of air pipe main body, cooperate sound absorption hole is favorable to absorb part noise, in turn is favorable to weaken part noise, by sound insulation board and is set in the outside of air pipe main body, it is favorable to further weaken noise, reduce its diffusion to outside, by both part is favorable to realize sound insulation and noise reduction, reduce noise transmission to external environment, in turn reduce noise pollution, by the outside of protective support cover is provided with buffer pad, it is favorable to absorb part vibration when air pipe main body operates, reduce vibration diffusion to building structure by support.

This invention discloses an intelligent aging cabinet for an automatic aging system in the audio industry, relating to the field of aging equipment technology. The aging cabinet body has an inlet and an outlet on opposite sides. A first and second isolating component intermittently unblocks either the inlet or outlet. During the process from when the audio product enters the aging station to when the aging cabinet body outputs the audio product that has completed the aging test, at least one of the first and second isolating components, together with the aging cabinet body, isolates the internal environment of the aging cabinet body from the external environment. This reduces noise pollution to the surrounding environment. Thus, while some audio products are still undergoing aging tests inside the aging cabinet, some audio products that have completed the aging test can be output from the aging cabinet body, while simultaneously inputting some audio products awaiting aging tests into the aging cabinet body. This shortens the waiting time for inputting and outputting audio products, resulting in higher overall efficiency when aging tests are performed on batches of audio products.

This utility model discloses a split-type cutting wheel using ceramic materials as the main body. It includes a semi-circular cutting wheel body, which is made of ceramic materials to form a lightweight, high-strength, and rigid main body. The main body is coated with a high-strength and high-wear-resistant coating to form an outer layer with high strength, hardness, wear resistance, impact resistance, and noise reduction performance. The combination forms a semi-circular cutting wheel structure that is lightweight, wear-resistant, has high cutting precision, and reduces noise pollution.

The purpose of this invention is to propose an oxygen depressurization explosion-proof electrostatic vacuum noise silencing device, belonging to the field of safe handling of flammable and explosive industrial gases. The device includes a vertical cylindrical body, a bottom air inlet, a top exhaust outlet, supporting legs, and inside the cylinder, a bottom flame arrester, a multi-stage pressure reduction and deceleration assembly, an electrostatic elimination sound-absorbing layer, and a top flame arrester. Through multi-stage U-shaped microporous baffles, progressive pressure reduction and deceleration are achieved; the metal wire sound-absorbing layer eliminates static electricity and absorbs noise; and the upper and lower double-layer flame arresters block the backfire path, completely solving the problems of electrostatic explosion, backfire, and noise pollution during oxygen depressurization. This invention is suitable for high-risk scenarios such as liquid oxygen stations, ensuring the safe production of flammable and explosive chemical facilities, avoiding personal injury and property damage, while meeting environmental protection and noise reduction requirements.

The utility model relates to the technical field of wall surface cloth, in particular to curved surface acoustic wall surface sticking cloth. The patch comprises a patch body, two convex grooves are formed in the surface of the patch body, strip-shaped plates are connected to the surfaces of the convex grooves in a sliding mode, connecting blocks are fixedly connected to the surfaces of the strip-shaped plates, flannelette is fixedly connected to the surfaces of the two connecting blocks, and the flannelette is attached to the surface of the patch body. The surface of the flannelette is fixedly connected with a plurality of flannelette points, the height sizes of the flannelette points are different, the surface of the patch body is provided with a plurality of sound absorption grooves, and a plurality of refraction protrusions are arranged in the sound absorption grooves. The problems that when sound waves meet a flat patch body, the sound waves on the surface of the patch body are intensively reflected, so that indoor sound interferes with each other, echo is obvious, voice definition is reduced, noise pollution is aggravated, normal communication, learning and rest of people are seriously affected, and even hearing fatigue is possibly caused are solved.

The present application relates to the technical field of coal mine machinery and equipment, and discloses a special extractor for coal mine cutting head pick, which comprises a connecting rod, a baffle is fixedly connected to the connecting rod, a buffer assembly is arranged on one side of the baffle, a flail is slidably sleeved in the middle of the connecting rod, a shovel type steel plate is fixedly connected to one end of the connecting rod away from the baffle, a protection assembly is arranged on one end of the connecting rod close to the shovel type steel plate, and a power assembly and a transmission assembly are arranged in the protection assembly; the buffer assembly is arranged, the cylindrical limiting structure of the protective sleeve and the sound insulation pad on the inner side are used, so that the flail is always limited in the protective sleeve during the sliding and impacting process, the hands of the operator are effectively prevented from being pinched, the sound insulation pad can greatly absorb the high-frequency metal noise generated when the flail impacts the baffle, the defects that the flail is completely exposed in the traditional extractor, the extrusion injury is easily caused, and the noise pollution is serious underground are made up for, and the safety and operation comfort of the extraction operation are significantly improved.

The application discloses a multi-channel alarm current test system with sound insulation function, which comprises a product test bin, the periphery of the product test bin is covered with sound-absorbing sponge, and the product test bin is further provided with a guide groove; a sound insulation board is slidably connected to the side of the guide groove; a motor is drivingly connected to the output end of the sound insulation board; a test base comprises a program-controlled power supply, a switch total gate, a line splitter, a self-recovery fuse circuit board, a plurality of test seat sub, and a multi-channel current acquisition module; and an upper computer is connected to the program-controlled power supply and the multi-channel current acquisition module. The multi-channel alarm current test system with sound insulation function can automatically realize multi-channel current test under multi-voltage working conditions through the upper computer, realize batch test of products, and realize noise reduction during test through the product test bin and the sound insulation board, solve the contradiction between multi-channel parallel test and noise pollution, and overcome the technical defects in the prior art.

The application discloses a movable membrane-shaped metamaterial sound barrier, which comprises a thin film noise reduction unit and a structure fixing unit for arranging and fixing the thin film noise reduction unit, wherein the thin film noise reduction unit comprises a microporous membrane, a first cavity, a first sound insulation layer, a second cavity and a second sound insulation layer arranged along the sound wave propagation direction, and the microporous membrane is provided with a plurality of micropores for absorbing sound waves; when sound waves enter the first cavity through the microporous membrane, the micropores and the first cavity are used for preliminary noise reduction to reduce reflected sound generated by the sound waves; the sound energy of the transmitted sound waves is reduced through the first sound insulation layer and the second sound insulation layer; and the sound energy of the transmitted sound waves is further reduced through the second cavity. The application further provides an installation method. The sound barrier provided by the application is convenient to disassemble and assemble and has the effects of sound insulation and sound absorption, so that the noise pollution of construction equipment in a construction site can be effectively reduced.

This invention discloses a multi-layer composite sound-absorbing device. The double-layer micro-perforated plate of this invention includes an upper micro-perforated plate and a lower micro-perforated plate, which are connected by a disc spring device. The upper and lower micro-perforated plates are connected around their perimeter by a frame, ensuring the disc spring device between them is compressed. The density gradient porous sound-absorbing material layer is composed of at least two layers of sound-absorbing material with different densities stacked together. This multi-layer composite sound-absorbing device is composed of resonant and resistive sound-absorbing materials, achieving excellent low-frequency broadband sound absorption, effectively solving low-frequency noise pollution problems in substations, converter stations, and other fields. By adjusting the plate spacing to change the compression state of the disc springs, different stiffness characteristics are obtained, thereby enhancing the resonant sound absorption effect for specific frequency bands of noise and specifically improving the sound absorption coefficient of the device for specific frequency bands of noise.

To make elevator announcements easy to hear while suppressing noise pollution. [Solution] An elevator system according to one embodiment comprises an elevator control system, a wireless announcement device installed in at least one of the elevator car or landing and capable of transmitting wireless signals containing audio data related to elevator announcements to the surroundings, a wireless signal transmitting device capable of transmitting wireless signals containing landing information to the surroundings, a mobile terminal for users of the elevator car, on which an application is installed that allows setting information related to the settings of the wireless announcement device to be set for each user, and a cloud server that is communicatively connected to the elevator control system and the mobile terminal. The user is equipped with an audio device that can receive wireless signals transmitted from the wireless announcement device and reproduce the audio data contained in the wireless signals.

The utility model relates to the related field of noise reduction assembly, especially a fan noise reduction assembly, including sound insulation room, sound insulation door, observation window, exhaust pipe, ventilation assembly and sound insulation board etc. The utility model discloses high damping vibration stop layer, high -efficient sound absorption sound insulation layer, metal pipe cover damping rubber are set up to reduce the noise that air flows in the pipeline produces, and is provided with sound insulation board in sound insulation room to reduce the mechanical noise that fan generates when working, and through ventilation assembly to the fan ventilation cooling in sound insulation room, and the sound reduction board can carry out the noise reduction treatment to the flowing air in the ventilation pipe, reduces the noise pollution through, is favorable to reducing the influence of large -scale fan for electric heating furnace in the use process to the production environment.

The utility model relates to a generator set noise reduction air scoop device, including installation side board, inner air scoop and outer air scoop, be provided with two or more than air inlet unit on the installation side board, the top of inner air scoop is installed in the inside of installation side board, the outside of inner air scoop is provided with inner sponge, the bottom of outer air scoop is installed in the inside of installation side board, the outer air scoop cover in the outside of inner air scoop, the outside of outer air scoop is provided with outer sponge. Distinguish from prior art, the utility model passes through setting up the inside and outside two layers air scoop on air inlet channel, has lengthened air inlet channel, and the noise transmission distance of engine operation in the inside of unit also lengthens, reduces noise pollution, the outside of inner air scoop is provided with inner sponge, the outside of outer air scoop is provided with outer sponge, can better absorb noise.

The present invention relates to the production of a sound-insulating textile surface comprising two fabric layers laminated to each other with the coated surfaces remaining on the inner surface, while the fabric surfaces remain on the outer surface. Providing benefits such as preventing noise pollution, improving sound acoustics and increasing privacy in many sectors from construction sites to production facilities, from homes to offices, from automobiles to industrial areas. The versatility of this fabric offers significant advantages, both aesthetically and functionally.

This application provides an industrial vacuum soundproof enclosure, relating to the field of soundproof enclosure technology. It includes a bottom pad module and a double-layer vacuum soundproof enclosure module detachably mounted on the bottom pad module. The double-layer vacuum soundproof enclosure module includes inner and outer connecting base plates detachably mounted on the bottom pad module. A transparent outer cover and a transparent inner cover located inside the transparent outer cover are connected to the side of the inner and outer connecting base plates away from the bottom pad module. A vacuum layer is formed between the transparent inner cover and the transparent outer cover. Through the unique structural design of the bottom pad module and the double-layer vacuum soundproof enclosure module, this application integrates a bottom pad module composed of a soft PP support plate and a silicone sound-absorbing plate, and a double-layer transparent vacuum enclosure composed of a transparent outer cover, a transparent inner cover, etc., forming a multi-dimensional sound insulation system. Compared with traditional sound insulation devices, this can reduce pump and motor noise and reduce noise pollution.

This invention provides a sound-insulating and waterproof material and its preparation method. The sound-insulating and waterproof material includes a composite material and a waterproof material, wherein the waterproof material coats the composite material, and the water contact angle of the waterproof material is >90°. The composite material includes a first composite layer and a second composite layer, with the first composite layer coating the second composite layer. The first composite layer includes lignin fibers, which are obtained by electrospinning lignin and a polymer. The second composite layer includes straw with a particle size of 0.1–1 mm. The sound-insulating and waterproof material provided by this invention, through its specially designed structure, possesses excellent sound insulation and waterproof performance. Furthermore, this invention improves noise pollution by utilizing agricultural waste, which not only conforms to environmental protection principles but also enhances economic benefits.

The utility model discloses a three -phase asynchronous motor with mute function relates to three -phase asynchronous motor technical field, the utility model discloses a three -phase asynchronous motor still includes: noise reduction mechanism, noise reduction mechanism sets up in the tail of three -phase asynchronous motor, and noise reduction mechanism is used for the noise of tail portion to carry out noise reduction, and sound absorption mechanism, sound absorption mechanism sets up in the output site of three -phase asynchronous motor, the utility model discloses the dust cover is positioned and is inserted with the positioning boss through the U -shaped block of inside, then the dust cover is fixed through screw, and the dust cover is limited with the cooperation of U -shaped block and positioning boss, reduces the shaking of dust cover, and the rubber pad can play the effect of shock attenuation when shaking, improves the mute effect, and the sound absorption cotton is in the rotation of radiating fan, absorbs the noise generated, improves the mute effect again, reduces the noise pollution in working environment greatly, thereby guarantees the comfort degree of staff.

This utility model belongs to the field of building decoration materials technology, and in particular, it is a green, environmentally friendly, and recyclable aluminum single panel. Addressing the problems of existing aluminum single panels being inconvenient to install, difficult to disassemble when damaged and needing replacement or repair, and the inability of current aluminum single panels to provide sound insulation, the following solution is proposed: It includes an installation frame and an aluminum single panel body installed within the installation frame. Multiple connecting brackets are symmetrically welded to one side of the installation frame, and these brackets are fixedly connected to the keel frame by bolts. A positioning frame is adhered inside the installation frame, and multiple U-shaped clips are symmetrically fixedly installed on one side of the aluminum single panel body. The installation frame designed in this utility model can assist in the quick installation or disassembly of the aluminum single panel body, thus providing excellent convenience during maintenance. Simultaneously, this technical solution achieves good sound insulation, effectively reducing noise pollution in practical use.

The utility model discloses a noise reduction device for coal preparation plant chute, including installation support, still include buffer board, and the buffer board is rotatoryly installed below the lowest end of the transfer chute body, and the lowest end of buffer board is supported to set up damping device. The utility model discloses through the buffer board of elastic setting can change angle and buffer of the discharge end of transfer chute body to reduce the impact force of material at chute export position to avoid the violent impact of material direct delivery to the inside component of chute, and the problem of the serious noise pollution, the accelerated wear and tear of equipment key part, the shortened service life of further causing is avoided, through the setting filling cotton block below the transfer chute body, the elastic support is carried out to the transfer chute body, and the vibration frequency of transfer chute body is reduced, and the vibration noise of transfer chute body can also be absorbed.

The utility model relates to the technical field of door and window fittings, concretely is a pulley assembly for door and window, including the connecting plate, the connecting plate bottom is provided with the wheel support, the inside installation of wheel support has the bearing axle, is provided with a group of shoulder pole wheel supports on bearing axle, and the both ends of shoulder pole wheel support are installed with bearing pulley, and the bottom surface both ends of connecting plate each is provided with a group of dustproof components, the utility model provides a pulley assembly for door and window, through adopting high strength, wear -resisting, self -lubricating material, combines the precision bearing structure, significantly improves the sliding smoothness and efficiency, low noise structure design reduces the noise pollution when sliding, promotes the living comfort, the bearing structure of dustproof and antifouling design and easy maintenance, prolongs the life, and reduces the maintenance cost, adopts high strength and low friction coefficient material, significantly improves the bearing capacity of pulley group, and simultaneously can also arrange multiple groups of pulleys simultaneously, to satisfy the demand of super heavy door and window.

The utility model relates to electric drive axle processing field discloses a kind of noise reduction device for electric drive axle, including working tank;Pushing assembly is arranged on the working tank;The pushing assembly includes support column;Driving processing piece is movably connected on the support column, and rotating is carried out to driving shaft by driving motor drive, rotating driving shaft drives switch gear to rotate, and rotating switch gear is engaged with switch tooth plate, so that switch plate is slid in water tank, and water tank and working tank are opened with water tank between Water tank is quickly flowed to working tank from water tank after switch plate opens, so that water curtain can be formed in working tank, so that the noise and dust in the processing process of driving processing piece are absorbed by the shielding of water curtain, so that the noise pollution and dust overflow pollution in the processing process of driving processing piece can be reduced.

This utility model discloses a water-lubricated oil-free twin-screw air compressor, relating to the technical field of oil-free twin-screw air compressors. It includes a silencing housing with an inner clamping frame inserted into its inner cavity. The silencing housing and the inner clamping frame are symmetrically distributed. A twin-screw air compressor is clamped between two of the inner clamping frames. A buffer mechanism is provided on opposite sides of the inner clamping frames. A connecting piece is fixedly installed between the two silencing housings. A sound-absorbing layer is fixedly bonded to the inner wall of the silencing housing. This utility model, by setting up a buffer mechanism, allows the buffer plate to push the support rod, which in turn drives the pressure plate to squeeze the damper and spring when the twin-screw air compressor vibrates during operation. This absorbs and dissipates vibration energy, thereby reducing component wear, extending service life, and reducing interference with surrounding equipment. The centrifugal glass wool sound-absorbing layer absorbs the noise generated by the twin-screw air compressor, reducing noise pollution in the working environment and improving the safety and comfort of the production environment.

The utility model provides a movable sound insulation and noise reduction and dust control cover device relates to the field of building construction auxiliary equipment. Including rock wool sound insulation cover and transparent acrylic cover, rock wool sound insulation cover and transparent acrylic cover all include framework structure and panel structure, the size of framework structure size adaptation well size, the panel structure connects framework structure, the panel structure is welded with a plurality of lifting points, transparent acrylic cover includes the cage cover of well and the cage cover of well. The utility model makes the working well rock layer broken construction guarantee the lighting at the same time greatly reduces the broken rock noise and the transmission of dust, effectively reaches the purpose that eliminates the noise pollution and dust pollution, avoids the influence of the disturbance to the adjacent residential area at the same time, avoids the risk such as the complaint of the civilian to the engineering construction, blocks the work, and guarantees the environmental protection at the same time, and the construction progress controllable is guaranteed.

The application discloses a wind-fish integration layout optimization method and device considering offshore wind power underwater noise, equipment and storage medium, relates to the seawater culture engineering technical field, and comprises the following steps: based on the linear relationship between wind speed and noise source sound source level and the noise attenuation model with underwater distance, an underwater noise propagation model of a wind turbine generator unit is established; based on the wake effect of the wind turbine generator unit, a power generation calculation model of a wind farm is established; based on a target function with the purpose of maximizing total power generation, a wind turbine generator unit spacing constraint and a noise limit constraint of a culture area, an optimization model is constructed; the wind turbine generator unit coordinates and the culture net cage coordinates are taken as inputs of the optimization model, the optimization model is solved, and the optimized layout positions of the wind turbine generator unit and the culture area are obtained, so that the single economic perspective of only considering power generation efficiency in traditional wind farm planning is broken through, the underwater noise pollution is taken as a core constraint and integrated into the layout optimization, and therefore, the contradiction between marine energy and resources is reduced.

The application relates to the technical field of generator sets, in particular to a compact gasoline generator set, which is provided with a protection assembly outside a generator set body to provide a protection effect and avoid the problem of collision damage of the generator set body; that is, a top cover plate is arranged on the top of a supporting frame, the side of the top cover plate is connected with auxiliary accessories, that is, the top cover plate and a protection side plate formed by a plurality of bearing strips realize the anti-collision protection function; wherein a first ventilation hole is arranged in the top cover plate and a second ventilation hole is arranged in the bearing strip, the purpose is to avoid affecting the heat dissipation work of the generator set body on the basis of ensuring the protection of the generator set body; a first sound-absorbing cotton plate is arranged on the inner side of the top cover plate, and a second sound-absorbing cotton plate is arranged on the inner side of the bearing strip, that is, on the basis of providing the anti-collision protection for the generator set body, noise generated by the generator set body can be reduced and absorbed, and the noise pollution is reduced.

Provided are a control method for a heating unit, the heating unit, and a refrigerating and freezing apparatus. The control method includes: acquiring a forward power signal output from an electromagnetic wave generation module and a reverse power signal returned to the electromagnetic wave generation module; calculating an electromagnetic wave absorption rate of an item to be treated according to the forward power signal and the reverse power signal; and adjusting a rotation speed of a cooling fan according to a power value of the forward power signal and the electromagnetic wave absorption rate. There is no need to dispose additional temperature sensing apparatuses, heat generated by the electromagnetic wave generation module can be reflected more precisely, and unexpected energy waste and noise pollution are avoided while fully cooling the electromagnetic wave generation module.

This utility model discloses a waste material recycling and crushing device for a vacuum forming machine. It relates to the field of vacuum forming machine processing technology and includes a worktable, a recycling bin, and a dust collection device. The recycling bin is located at the top of the worktable. This utility model incorporates a sealing device. Waste material is poured into the recycling bin from the feed inlet. Due to its own weight, the waste material compresses a blocking head, causing it to move away from the feed inlet. The blocking head then moves a connecting plate downwards, which in turn moves a movable rod downwards, compressing a spring and facilitating the entry of waste material into the recycling bin. When the waste material stops entering the feed inlet, the spring's elasticity causes the movable rod to move upwards, which in turn moves the connecting plate upwards, sealing the feed inlet with the blocking head. This reduces dust dispersion after crushing, preventing harm to workers' health and also preventing noise from spreading through the feed inlet, thus reducing noise pollution.

This utility model belongs to the field of building technology and discloses an auxiliary device for sound insulation and heat insulation of a guest room door. It includes a door frame, with a guest room door hinged inside the frame. A handle is fixedly installed on the front of the guest room door, and a touch switch is fixedly installed below the handle on the front of the door. A water tank is fixedly installed inside the guest room door, with a sound-absorbing panel fixedly connected to one end and a heat-insulating panel fixedly connected to the other end. A water inlet pipe is fixedly connected to the top of the outer surface of the water tank, and a water outlet pipe is fixedly connected to the bottom. A sealing assembly is movably connected inside the bottom of the guest room door. The sealing assembly includes a movable plate movably connected inside the bottom of the guest room door, which can block and absorb external sound and heat, effectively reducing sound penetration and noise pollution while also reducing heat conduction, thus effectively improving the sound insulation and heat insulation performance of the guest room door.

This utility model provides a hollow, one-time injection-molded composite fencing, relating to the field of fencing technology. It includes a fencing body and two sound-absorbing components, both fixedly installed on the exterior of the fencing body, for quickly absorbing noise generated during construction. In this utility model, when noise contacts the surface sound-absorbing panel, some sound waves are directly absorbed and reflected, achieving initial attenuation. The remaining sound waves enter the cavity through the sound inlet holes and undergo multiple reflections under the action of a specially designed corrugated plate, significantly extending the propagation path and converting most of the sound energy into heat energy. Finally, the residual sound waves are completely absorbed by the sound-absorbing cotton and the inner wall sound-absorbing panel, achieving noise reduction across the entire frequency band. The structure adopts a multi-layer composite noise reduction design, achieving efficient sound energy absorption through a stepped noise reduction mechanism. This not only effectively reduces noise pollution and harms residents' health but also significantly improves the traffic environment and reduces the risk of accidents caused by noise interference for drivers.