936 results about "Acoustic board" patented technology

The invention relates to the technical field of sound-absorbing board production equipment, and discloses a sound-absorbing board production raw material fiber carding device which comprises a rack and an equipment shell, cotton feeding plates are sequentially arranged on the rack in the raw material advancing direction, and the sound-absorbing board raw material fiber carding device is movably connected with the equipment shell through a movable connecting mechanism. Rotation of the carding roller is converted into high-frequency axial reverse reciprocating motion and instant collision vibration of the assembly discs at the two ends, inverted-V-shaped staggered needle forests hinged between the assembly discs are driven, and transverse rubbing action is executed while the needle forests rotate in the circumferential direction along with the roller. According to the invention, by matching with the progressive compression and fiber fan-shaped expansion effect formed by the inverted V-shaped needle forest layout and the centrifugal acceleration inclined airflow to accurately purge the roots of the needle forests, powerful separation kinetic energy and a clear escape path are provided for dust impurities wrapped in fiber bundles, the deep removal rate of fine impurities is obviously improved, and the dust removal efficiency is improved. Meanwhile, the fiber length and integrity are effectively protected, and the fiber breaking rate is reduced, so that the acoustic performance and quality of a final acoustic board product are guaranteed.

The invention provides a movable sound insulation dustproof construction shed, a plurality of supporting mechanisms are sequentially arranged in a shed body in the X-axis direction, and each supporting mechanism comprises two telescopic rods oppositely arranged in the Y-axis direction, a supporting assembly erected on the two telescopic rods and a walking assembly connected to the lower end of each telescopic rod; each telescopic rod is provided with a first limiting assembly used for limiting a sound insulation plate installed on the telescopic rod, and the supporting assembly comprises a first arc-shaped supporting rod and a second arc-shaped supporting rod which are used for supporting the shed body located at the upper ends of the two telescopic rods and can be oppositely folded. The walking assembly is used for driving each telescopic rod to move or stop, so that the problems that an existing dustproof noise reduction shed lacks comprehensive shielding and sound insulation measures on a device to be shielded, and sound insulation felt cloth is inconvenient to disassemble and assemble, so that the dustproof noise reduction effect and stability of the dustproof noise reduction shed are poor are solved.

The invention relates to the related technical field of building sound insulation materials, in particular to a building heat preservation and sound insulation wall which comprises a building wall body, a vertical main keel, a transverse auxiliary keel and a sound insulation board, the vertical main keel is fixed to the building wall body, and the transverse auxiliary keel is fixedly connected to the vertical main keel; a plurality of transverse auxiliary keels are arranged between the adjacent vertical main keels at equal intervals, the sound insulation plate is positioned and fixed on the transverse auxiliary keels, the sound insulation plate comprises a bottom plate layer, a sound insulation layer and a panel layer, the inner side face of the sound insulation layer is fixedly connected with the bottom plate layer, and the outer side face of the sound insulation layer is fixedly connected with the panel layer; the building heat preservation and sound insulation wall is formed by combining the building wall body, the vertical main keels, the transverse auxiliary keels and the sound insulation plate, the sound insulation plate is formed by combining the bottom plate layer, the sound insulation layer and the face plate layer, the sound insulation groove is formed in the sound insulation layer, and the sound absorption cotton is filled in the sound insulation groove, so that the overall strength of the sound insulation plate is guaranteed, and meanwhile the sound insulation effect is improved. And the overall sound insulation and heat preservation effects of the sound insulation plate can be fully ensured.

A plant sound insulation screen comprises sound insulation plates continuously arranged on one side of a plant wall, a preset interval is formed between every two adjacent sound insulation plates, and supports are arranged at the positions, corresponding to the adjacent sound insulation plates, of the wall. The support is of a metal plate structure, the lower end of the support is provided with a supporting plate perpendicular to the enclosing wall and extending outwards and used for supporting the bottom faces of the ends of the sound insulation plates, the top of the support is flush with or higher than the top faces of the sound insulation plates, and the width of the support is larger than the interval between the adjacent sound insulation plates. The bracket is fixed on the surface of an enclosing wall through expansion screws; locking screws are vertically arranged on the support in a penetrating mode and located in the intervals between the adjacent sound insulation plates, and pressing plates are arranged on the locking screws in a sleeving mode and used for pressing the side portions of the sound insulation plates. The scheme facilitates later replacement of the sound insulation board, is more convenient to disassemble and assemble, and can effectively ensure the uniformity and sound insulation effect of the sound insulation screen before and after replacement of the sound insulation board.

The invention relates to the technical field of transformers, and discloses a noise reduction type intelligent large dry-type transformer which comprises a base, a sound insulation plate is fixedly connected to the left side of the base, a ventilation door is rotatably connected to the front portion of the sound insulation plate, a buffer spring is fixedly connected to the inner wall of the base, and a supporting frame is fixedly connected to the top of the buffer spring. A transformer body is arranged at the top of the supporting frame, a fixing plate is fixedly connected to the left side of a sound insulation plate, a chamfering plate is fixedly connected to the bottom of the fixing plate, a reciprocating lead screw is rotatably connected to the inner wall of the chamfering plate, and a U-shaped plate is in threaded connection with the circumferential surface of the reciprocating lead screw. And vibration generated in the operation process of the transformer body can be buffered, so that mechanical vibration generated in the operation process of the transformer body can be remarkably reduced, noise is reduced, and the comfort degree of the working environment is improved.

The invention relates to the technical field of multi-layer material preparation, in particular to a high-light-transmittance weather-proof impact-resistant striped sound insulation board. The problem that transparency, weather resistance and sound insulation effect of a traditional stripe material are difficult to consider at the same time is solved. The light scattering and absorption center is reduced and high transparency and low haze are realized through reactive extrusion of the recycled material, combination of high-temperature adsorption activated carbon, multi-stage high vacuum and deep purification of a reactive decolorizing agent, and matching of transparent dispersion diffusion master batch and a compatilizer. The surface layer adopts the core-shell weather-resistant master batch and the secondary high-energy UV fluorosilicone curing coating for double shielding of ultraviolet and inhibition of photodegradation and yellowing; styrene-maleic anhydride damping resin is introduced into the middle layer, and uniform inclined micropores and asymmetric stripes formed by supercritical CO2 are combined, so that the medium and low frequency sound insulation index is improved; the bottom layer is repaired and guaranteed to be durable in impact resistance by virtue of a core-shell toughening agent and molecular chain extension; the defects of traditional products are overcome, and the service life requirement of sound barriers for expressways and rail transit is met.

The invention relates to a trim foam (1) for a motor vehicle rear-view mirror (3) having a gusset, the trim foam (1) being intended to be placed between a base (31) of the rear-view mirror (3) having a gusset and a bodywork element (2) of the motor vehicle, the trim foam (1) including a central region (12) and a peripheral region (11), the trim foam (1) including sound insulation means located at the peripheral region (11) and making it possible to achieve sound insulation between the base (31) and the bodywork element (2), the sound insulation means including at least one acoustic baffle (14).

The invention relates to the technical field of assembly type structures, and particularly discloses a movable assembly type integrated sound insulation cover which comprises a side blocking structure, first sound insulation plates are detachably clamped on the side blocking structure, the first sound insulation plates are transversely and longitudinally spliced through the side blocking structure, an upper blocking structure is detachably installed on the side blocking structure, and a lower blocking structure is detachably installed on the upper blocking structure. A second sound insulation plate is detachably clamped on the upper blocking structure; wherein the side blocking structures are used for bearing the first sound insulation plates, the side blocking structures can be oppositely spliced, the first sound insulation plates are arranged in a concave shape, the side blocking structures are further used for supporting the upper blocking structures, the upper blocking structures are used for being matched with the side blocking structures to be transversely spliced, and the first sound insulation plates can be driven to form an L-shaped, concave, arc-shaped or even cylindrical enclosure through the overturning function of the shaft column; the sound-proof cover does not need to be customized independently for specific equipment, can be matched with industrial equipment with different sizes and different shapes such as lathes, milling machines, fans and compressors, and overcomes the universality defect that a traditional fixed sound-proof cover has one function.

The utility model relates to the technical field of environmental protection engineering, construction engineering waste treatment and resource recovery, and discloses an environment-friendly concrete waste recovery device which comprises a base, a crushing box is fixedly arranged at the top of the base through a fixing frame, a conveying belt is rotationally arranged on one side of the crushing box, and the other end of the conveying belt is rotationally arranged on one side of a screening box. According to the environment-friendly concrete waste recycling device, the crushing box, the screening box, the dust removal box and the sound insulation plate are arranged, aggregate crushed through the crushing box enters the screening box to be screened, the aggregate of different sizes is collected, dust generated in the screening process is removed through the dust removal box, and the dust removal effect is good. And meanwhile, noise generated in the recycling process can be reduced to a certain degree by a sound insulation plate, and the effects that dust generated in the treatment process can be effectively reduced, aggregate of different sizes can be screened and recycled respectively, and noise pollution generated in the recycling process can be effectively reduced are achieved.

The invention provides a high-strength sound-insulation fireproof composite board, and relates to the technical field of composite boards. The frame body is of an H-shaped structure, and aerogel is arranged at the two ends of the inner side of the frame body; the frame body is provided with the sound insulation plates, the sound insulation plates are symmetrically arranged at the two ends of the inner side of the frame body, noise sound waves penetrate through the fireproof plates and then are reflected and refracted multiple times in the spiral sound absorption holes, the sound wave propagation path is effectively disturbed, the efficient sound absorption characteristic of aerogel is matched, and a multi-stage attenuation mechanism for noise of different frequency bands such as high frequency and low frequency is formed. Compared with a traditional single-material sound insulation mode, the composite structure breaks through the bottleneck of sound insulation performance, can meet the noise reduction requirements in complex noise environments such as building decoration and industrial factory buildings, and solves the problems that a traditional board mostly depends on a single sound insulation material to achieve the noise reduction function, systematic acoustic structure design and the material synergistic effect are lacked, and the noise reduction effect is poor. The noise reduction requirements in complex noise environments such as high frequency, low frequency and the like are difficult to meet.

The utility model discloses a cadmium telluride power generation glass sound barrier which comprises a base frame, the base frame is of a U-shaped structure, movable grooves are formed in the inner walls of the two sides of the base frame, a lower sound insulation plate is arranged at the lower end in the base frame, a plurality of upper sound insulation plates are installed on the inner side of the base frame above the lower sound insulation plate, and movable blocks are arranged on the outer walls of the two sides of the upper sound insulation plates. A plurality of locking bolts are installed on the outer surfaces of the two sides of the base frame, one ends of the locking bolts penetrate through the base frame and are in threaded connection with the surfaces of the movable blocks, bottom frames are arranged on the two sides of the bottom end of the base frame, two L-shaped positioning bases are arranged on the outer walls of the bottom frames, and first cadmium telluride power generation glass is installed on the outer wall of one side of the lower sound insulation plate. Second cadmium telluride power generation glass is installed on the outer wall of the side, away from the first cadmium telluride power generation glass, of the lower sound insulation plate. According to the utility model, the purpose that the sound barrier is easy to replace and maintain is achieved, the energy utilization efficiency is improved, and the stability of the sound barrier in use is improved.

The utility model discloses a sound-proof decorative plate, which relates to the technical field of decorative plates and comprises a plate main body, the plate main body comprises a decorative plate and a base plate, a sound-proof plate is connected between the decorative plate and the base plate, and the sound-proof plate comprises a front sound-proof plate and a rear sound-proof plate. A plurality of cavity grooves are formed in one side of the front sound insulation plate and one side of the rear sound insulation plate, complex reflection and scattering paths can be formed through the sound insulation folded plates, the contact opportunity of sound waves and sound absorption materials is increased, the problem that the sound insulation effect of a decorative plate is poor is solved, and the sound insulation performance of the decorative plate is improved; the front sound insulation layer, the middle sound insulation layer and the rear sound insulation layer are matched with aperture decreasing, so that the decorative plate can specifically absorb sound waves of different frequencies, the effect of widening the sound absorption frequency band is achieved, the problem that the decorative plate is poor in sound absorption effect of different frequency bands is solved, and the absorption effect of the decorative plate on the sound of different frequency bands can be improved.

The utility model discloses an indoor assembled silence bin, and relates to the technical field of silence bins. The silence door comprises a base and a silence door body, the silence door body is hinged to the top of the base, the top of the base is provided with a convenient-to-assemble device, the convenient-to-assemble device comprises a first fixing strip, the front side face of the first fixing strip is provided with a first sliding groove, and the inner wall of the first sliding groove is connected with a first sliding block in a sliding mode. Through mutual cooperation of the first fixing strip, the first sliding groove, the first sliding block, the connecting plate, the spring, the limiting block, the contact plate, the sound insulation plate and other components, the cover plate on the side face of the fixing plate is turned at the same time to make the cover plate do arc-shaped movement, and when the cover plate moves to a certain position, the contact plate fixed to the side face of the cover plate makes contact with the limiting block fixed to the other end of the spring; and the cover plate continuously moves, so that the operation of a worker is facilitated when the mute bin is assembled.

The utility model discloses a rim spinning, dividing and forming device which comprises a supporting seat, the top end of the supporting seat is fixedly connected with a sound insulation cover, one end of the sound insulation cover is provided with an observation window, the sound insulation cover and the inner side of the supporting seat are connected with a movable frame in a sliding mode, and the top of the movable frame is provided with a plurality of inserting grooves which are formed at equal intervals. Rollers are fixedly connected to the two sides of the bottom end of the moving frame, and first sliding grooves are formed in the moving frame and located between the adjacent inserting grooves. A buffer mechanism in the moving frame can effectively reduce impact vibration when the spinning model works, stable operation of the device is guaranteed, and the service life of the device is prolonged; the sound insulation effect of the device is enhanced through related structures and sound insulation plates in the sound insulation cover, and the working environment is optimized; the driving mechanism and the limiting mechanism in the supporting seat provide power for the moving frame, conduct limiting and guiding, ensure accurate and stable movement of the moving frame and improve the working accuracy and reliability, and therefore the rim machining quality and the production efficiency can be improved easily.

This utility model relates to a multi-fan main unit cabinet for housing multi-fan main units, including a body, a cabinet door, a sound insulation panel, and partitions. The body is a hollow structure with an open front end. The cabinet door is located at the front end of the body. The sound insulation panel is a polyester fiber sound-absorbing panel, which is respectively installed on the outer wall of the body and the cabinet door. The partitions are located inside the body, dividing the interior of the body into a first chamber and a second chamber. The first chamber is suitable for housing the exhaust chamber of the multi-fan main unit, and the second chamber is suitable for housing the inlet chamber of the multi-fan main unit. By using polyester fiber sound-absorbing panels as sound insulation panels, partitioning the partitions, and designing a structure that accommodates the ductwork of the multi-fan main unit, the multi-fan main unit cabinet according to this utility model embodiment can effectively reduce the external transmission of main unit operating noise, optimize the utilization of internal space, and solve the problems of noise interference and spatial disorder when placing multi-fan main units.

The invention provides a curved particle acoustic board wall blank door structure and a construction method thereof. The curved particle acoustic board wall blank door structure is characterized in that a wall supporting frame is arranged on a wall base layer; the surface layer supporting framework is arranged on the wall body supporting framework, a surface layer acoustic board is further arranged on the side, opposite to the wall body supporting framework, of the surface layer supporting framework, and door openings are further formed in the surface layer supporting framework and the surface layer acoustic board; the wall blank door body is arranged at the door opening in an opening and closing mode, and a cantilever door hinge mechanism is arranged between the wall blank door body and the wall supporting frame. The sound absorption wall body and the blank door are perfectly combined through the wall face blank door body, the opening and closing functions of the blank door can be achieved without damaging an original sound absorption structure, meanwhile, good acoustic performance is guaranteed, and the problems that an existing wall face blank door is poor in sound absorption effect and low in fusion degree, and the quality is difficult to guarantee are solved.

The invention relates to a road sound insulation board for traffic engineering, and belongs to the technical field of road sound insulation boards, the road sound insulation board comprises a mounting base, a sound insulation board body is detachably connected to the top of the mounting base, silencing holes are formed in the surface of the sound insulation board body, and a water storage cavity is formed in the sound insulation board body. According to the green plant pot and the first spraying pipe, when sound insulation operation is conducted on a road through the road sound insulation board, in order to improve the multifunctionality of the sound insulation board in daily use and achieve the multiple noise reduction effect on road noise, a planting rod is turned over to be in a horizontal state, and the green plant pot is placed outside the planting rod; a first spraying pipe is opened to spray green plants, meanwhile, a control valve outside a connecting pipe is opened, a municipal water source is conveyed into a water storage cavity under the formation of a circulating opening, a sound insulation means is added in a sound insulation plate, and multiple noise reduction operation is performed on noise under the sound insulation condition of the sound insulation plate; and the aesthetic effect of the sound insulation plate in daily use is increased.

This utility model discloses a sound insulation test bench for passenger compartment doors, relating to the technical field of sound insulation test benches. It includes a base plate, on the upper side of which a soundproof cover is mounted. The soundproof cover has a mounting frame groove on its side. Two soundproof panels and a soundproof frame are slidably fitted onto the inner walls and top wall of the mounting frame groove, respectively. An adjustment assembly is provided between the soundproof frame and the two soundproof panels and the soundproof cover. A fixing frame is installed between the soundproof frame and the two soundproof panels. The passenger compartment door body is mounted on the inner wall of the fixing frame. A disassembly assembly is provided between the fixing frame and the two soundproof panels. By adjusting the first servo motor, the second servo motor drive gear, and the bidirectional threaded rod in the adjustment assembly, the positions of the soundproof panels and the soundproof frame can be flexibly adjusted to accommodate passenger compartment door bodies of different sizes. The disassembly assembly allows for quick disassembly of the fixing frame and the passenger compartment door body, saving time and manpower compared to the traditional method of extensive bolt installation.

The utility model discloses an interior decoration soundproof wall, which relates to the technical field of interior decoration and comprises a wall body, the wall body further comprises a first wall plate and a second wall plate, a plug-in fixing component is arranged between the first wall plate and the second wall plate, soundproof plates are arranged in the first wall plate and the second wall plate in an embedded manner, and the first wall plate and the second wall plate are connected through a plug-in fixing component. The first wall plate and the second wall plate are arranged on the wall body, two sound insulation plates are arranged between the first wall plate and the second wall plate, sound insulation cotton is arranged between the two sound insulation plates, a positioning assembly is further arranged between the sound insulation plates and the sound insulation cotton, and a sealing piece is arranged on at least one of the wall body and the inserting and fixing assembly. The sound insulation cotton and the sound insulation plate are conveniently and rapidly fixed; secondly, the sound insulation plates are embedded in the first wall plate and the second wall plate, so that the thickness of the wall body is reduced while the sound insulation effect is guaranteed; and thirdly, the sound insulation effect is improved by the sealing element.

The utility model discloses a bluetooth earphone with a noise reduction function, which comprises a charging bin and a dustproof cover, a rubber cover is embedded at the lower part in the charging bin, a charging port is arranged above the rubber cover, the dustproof cover is hinged above the charging bin, and a magnet II is adhered at the lower part in the dustproof cover. Compared with an existing Bluetooth earphone, the Bluetooth earphone with the noise reduction function has the advantages that the rubber cover is covered, the dustproof cover and the charging bin are closed, and the sealing ring below the dustproof cover is tightly attached to the charging bin under the magnetic action of the first magnet and the second magnet, so that charging and earphone taking are facilitated, water and dust can be prevented from entering the earphone to damage the earphone, and the earphone is convenient to use. When entering the earphone, external noise is weakened by the vacuum bubble, then part of the noise is reflected by the sound insulation plate, part of the noise is absorbed by the sound absorption cotton wrapping the loudspeaker, the sound is transmitted out through the sound transmission pipe, the double-layer hollow structure of the sound transmission pipe can effectively isolate the external noise, and the filter screen prevents dust and other impurities from entering.

The invention relates to the technical field of building materials, and discloses a composite floor sound insulation board and a preparation method thereof, and the preparation method comprises the four core steps of base material pretreatment, honeycomb structure forming, PP non-woven fabric compounding, post-treatment and cutting. The composite floor sound insulation board prepared by the method comprises an HDPE substrate, a honeycomb structure layer, an epoxy resin adhesive layer and a PP non-woven fabric layer which are sequentially compounded. Tests show that the weighted sound insulation index is larger than or equal to 55 dB in the frequency band of 100 Hz to 5000 Hz, the heat conductivity coefficient is stabilized to be 0.028 W / mK to 0.035 W / mK, the interlayer bonding strength is larger than or equal to 1.5 MPa, the sound insulation and heat insulation performance and the structural durability are excellent, the compatibility of the preparation technology is high, and the sound insulation and heat insulation composite board is suitable for being used in the building. The technical problems that an existing floor sound insulation board is poor in preparation process stability, insufficient in product sound insulation performance, large in heat conductivity coefficient fluctuation and prone to failure of interlayer bonding can be solved, and the floor sound insulation board is suitable for large-scale production and can be widely applied to floor sound insulation projects of residences, office buildings and other buildings.

The utility model discloses a thermal insulation wall body structure for building construction, which comprises a wall body, and one surface of the wall body is connected with a thermal insulation mechanism through a convenient disassembly and assembly mechanism; the heat preservation mechanism comprises a positioning ring plate arranged on one face of the wall, and a heat preservation plate and a sound insulation plate are sequentially arranged in an inner cavity of the positioning ring plate from inside to outside. The insulation board and the sound insulation board can be positioned, the insulation board can be conveniently mounted on a wall, the sound insulation board has a good sound insulation effect, the fireproof pressing plate presses the insulation board and the sound insulation board into the positioning annular plate, a good fireproof effect can be achieved, the fireproof pressing plate can be limited through the convenient dismounting and mounting mechanism, and the insulation board can be conveniently mounted on the wall. The fireproof pressing plate can be conveniently disassembled and assembled, so that the heat preservation plate and the sound insulation plate can be conveniently disassembled and assembled, the connection heat preservation plate and the connection pressing plate can be connected to the side wall of the fireproof pressing plate through the fixed splicing mechanism, the heat preservation plate and the connection heat preservation plate are easier to disassemble and assemble, the heat preservation plate can be conveniently disassembled and assembled, and the heat preservation effect is ensured.

The utility model relates to the technical field of ceramic composite boards, in particular to a wear-resistant ceramic composite board which comprises a protective surrounding edge, a mounting structure is arranged on the inner side of the protective surrounding edge, wear-resistant assemblies are arranged in the mounting structure, and anti-seismic mechanisms and protective assemblies are arranged on the inner sides of the wear-resistant assemblies on the upper side and the lower side. The protection assembly is located on the inner side of the anti-seismic mechanism. According to the utility model, the protection assembly is arranged, when the protection assembly is used, the protection assembly is composed of a resin layer, a metal fiber layer, a waterproof layer, a heat preservation layer, a sound insulation plate and a shaping honeycomb plate, and the metal fiber layer is arranged in a crossed manner, so that the strength and the toughness of the assembly are enhanced, and excellent impact resistance and wear resistance are ensured in the use process; the arrangement of the waterproof layer and the heat preservation layer not only improves the waterproof and heat preservation performance of the assembly, but also effectively prevents the damage caused by damp and temperature change of the internal structure, thereby prolonging the service life, and the application of the sound insulation plate effectively weakens the external noise.

The low-noise chain plate type bucket elevator comprises an elevator body, supporting legs and a motor, a first shell is welded to the top of the elevator body, a second shell is arranged above the elevator body, interlayers are arranged in the first shell and the second shell respectively, sound insulation plates are installed in the interlayers, and the first shell and the second shell are connected through the sound insulation plates. And a support is installed at the top of the first shell, a screw rod is arranged above the support, and a threaded sleeve is welded to the interior of the round hole. According to the low-noise chain plate type bucket elevator, the first shell is welded to the top of the elevator body, meanwhile, the second shell is arranged above the elevator body, a sound insulation plate is installed in an interlayer, the second shell is connected with a screw rod through a rotating disc, and the screw rod is combined with a threaded sleeve and the rotating disc to drive the second shell to ascend and descend; and when materials of different sizes are conveyed, the situation that the materials are scratched can be reduced by adjusting the height of the second shell, and the noise reduction range of the elevator is widened.

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.

The utility model discloses a novel cylinder cover which comprises a cover box, a cover plate frame is arranged on the cover box, the cover box and the cover plate frame are of an integrated structure, a partition plate is arranged in the cover plate frame, a first sound insulation plate and a second sound insulation plate are arranged on the two sides of the partition plate, and sound insulation padding and supporting columns are arranged between the first sound insulation plate and the second sound insulation plate. The first sound insulation plate and the second sound insulation plate are respectively provided with a first inserting hole and a second inserting hole, and the two ends of the supporting column are respectively connected with the first inserting hole and the second inserting hole in an inserted mode. Therefore, noise interference to surrounding workers is avoided; the heat dissipation fins between the cover box and the cover plate frame can increase the heat dissipation area of the cylinder cover, and efficient heat dissipation of the cylinder cover is facilitated.

A sound attenuation panel for an aircraft turbomachine includes first and second skins and a core comprising. The core has at least one polygonal cell provided with an internal cavity in communication with at least one hole formed in the first wall. The cavity has a first height (H1) between the first and second skins. Each cavity includes at least one internal partition that extends substantially from the first skin perpendicular to the first and second skins over a second height (H2) that is less than the first height (H1) and transversely between two side walls of the cell. The internal partition divides the cavity into at least two adjacent pockets in communication with one another and with the hole.

The utility model discloses a detachable temporary sound insulation wall for highway safety facility engineering. The detachable temporary sound insulation wall comprises a fixing base, a sound insulation assembly and a locking assembly. The sound insulation assembly is used for isolating construction noise and comprises a fixing frame structure, a sound insulation plate is arranged on the inner side of the fixing frame structure, the fixing frame structure is connected to the top of the fixing base in a penetrating and inserting mode, a limiting piece used for splicing the sound insulation wall is arranged on the side of the fixing frame structure, and the locking assembly is connected to the side of the fixing base in a penetrating and inserting mode. The locking assembly is used for fixing the sound insulation plate; according to the sound insulation assembly fixing frame structure, the limiting pieces are arranged at the splicing positions of the sound insulation assembly fixing frame structure, and through position limitation of the limiting pieces, when the splicing positions between the sound insulation assemblies are extruded and collided by construction external force, the limiting pieces can enable the multiple sound insulation assemblies to be spliced into a whole; and the situation that the sound insulation assemblies are spliced, deviated and staggered due to external force collision, and overall wall sound insulation is affected is avoided.