291results about How to "Improve sound insulation performance" patented technology

The invention relates to a porous rubber material member. The member comprises a thin covering layer and a hole sound absorption layer which are integrated and made of a rubber material, wherein holes of the hole sound absorption layer are blind holes. The hole condition of the porous rubber material member is different from that of the common porous sound insulation material; in order to exert a sound absorption function, air holes of the common porous material are open and intercommunicated, and sound absorption property is higher when the number of the air holes is larger; the blind holes are directly and vertically punched on a rubber plate, so the porous rubber material member is suitable for vibration reduction and sound insulation in an air medium, and meets the requirement of certain pressure resistance when underwater equipment works in a deep water area; movement resistance can be reduced because the porous rubber material member has smooth appearance; in addition, the hole sound absorption layer and the thin covering layer are combined to form a composite structure, so the porous rubber material member has high sound absorption and sound insulation properties.

The invention discloses a double-hollow glass ceiling module with a film suspended therein. An optical control film serves as a middle layer, and an internally suspended film structure frame, a mounting structure frame, a reinforcing separating strip and glass are sealed into an integral double-hollow glass plate. An inner structure frame and an outer structure frame are made from a novel heat-isolating material with a coefficient of thermal expansion similar to that of the glass. The internally suspended film structure frame is structurally connected through a heat-isolating bridge. A butyl rubber tape on the outer surface of the internally suspended film structure frame serves as a first sealing layer. A second sealing layer consists of the external reinforcing separating strip and a silicone structural sealant, the whole structure is always consistent to the thermal deformation of the glass, so that the sealing capability of the whole system is more reliable, and the heat-isolating property, the moisture condensation-preventing property, the sound-isolating property and the like are greatly improved. Dirt is not easily accumulated on the outer surface of a mounted ceiling, so that the ceiling is convenient to clean and maintain. The double-hollow glass ceiling module has a flexible assembling and mounting way, and can be applied to different vertical surfaces of an outer building rail.

The invention discloses a sound insulation module which comprises a first sound insulation board (1), a second sound insulation board (2) and sound absorbers (3) arranged between the two sound insulation boards or attached and connected to the surface of the first sound insulation board (1) or second sound insulation board (2). The invention also discloses a sound absorption and insulation composite structure of an embedded truss structure with the sound insulation module. The sound absorption and insulation composite structure comprises truss uprights (9) being embedded in uprights (8) of a plant and being capable of being fixed to the ground, embedded bottom cross beams between bottoms of the truss uprights (9), and a #-shaped truss structure formed by transverse support trusses (11) fixedly connected with the truss uprights (9), and grooves of the sound insulation module are embedded and sleeved on the truss uprights (9) and positioned between the embedded bottom cross beams and the transverse support trusses (11). The insulation composite structure eliminates a gap of a wall body to realize the cutting-off an acoustic bridge, and is good in wall body rigidity and simple in installation procedure.

The present invention discloses a GRC sound-absorbing sound-insulating coenosarcs sound screen made of new-type material. The front portion of inner cavity of said sound screen is sound-absorbing material cavity, and its rear portion is air cushion cavity. The described sound screen body is alkali-proof glass fibre reinforced cement component whose composition includes (by weight portion) 40-60 portions of cement, 40-55 portions of sand, 2-4 portions of alkali-proof glass fibre and proper quantity of water.

The invention relates to a novel ground radiation air-conditioning ground surface, which is applicable to various industrial and civil buildings and is characterized by using cold or hot water generated by various energy-saving refrigeration and heating apparatuses as cold or heat source water conveyed into a circulating water pipe of an assembled cavity composite ground surface to achieve the function of the ground radiation air-conditioning ground surface. Meanwhile, the invention also provides a novel natural ventilation system which allows outdoor fresh air to flow into a cavity ventilation floor through an outdoor ventilation pipeline and an external wall air inlet and to flow into each room on each story from a cavity air inlet washboard, and further discharges the indoor air out of rooms from an external wall air outlet through the natural convection of the air or an assistant discharge fan to adjust the indoor air naturally without opening windows; and the invention also provides various recyclable novel materials for cavity composite floors and the like. The novel ground radiation air-conditioning ground surface has the advantages of industrial assembled type construction, work efficiency improvement, shortened construction period, lower construction cost compared with the prior ground radiation heating ground surface, simple and convenient construction, cleanness and environmental protection and the like.

The invention discloses a porous material-pored corrugated compound light multifunctional sandwich panel and a preparation method. The method comprises the following steps: successively welding a pored metal sheet, a pored corrugated sandwich structure and an unperforated metal sheet; filling an opening porous material into a space formed between the pored corrugated sandwich structure and the unperforated metal sheet; compounding the opening porous material and a pored corrugated sandwich panel. Compared with the single narrow band sound absorption or sound insulation property of the other traditional acoustic structure, the structure disclosed by the invention is capable of simultaneously realizing the sound absorption and sound insulation properties in low frequency and wide frequency. Due to the excellent mechanical properties, such as, specific stiffness, strength and shock resistance, of the sandwich panel, the structure disclosed by the invention is an ultra-light multifunctional structure with excellent acoustical and mechanical properties and has significant application prospect in the engineering field.

The invention relates to a light-storable self luminous transparent film, which comprises a transparent organic resin film, light-storable self luminous transparent granules, and accessional materials, wherein the light-storable self luminous transparent granules of which the diameter range is between 5 nanometers and 300 meshes are evenly distributed in the transparent organic resin film.

This invention relates to a method for preparing fireproof and heat-insulating board for architectures. The fireproof and heat-insulating board comprises aggregate and gel material at a weight ratio of (100-150):(100-250). The gel material comprises: light-burned MgO 46-56 wt.%, industrial MgCl2 20-26 wt.%, H2O2 1.5-3.5 wt.%, H3PO4 0.2-0.3 wt.%, HBO3 0.2-0.3 wt.%, and water 20-26 wt.%. The method comprises: (1) screening foam glass (particle sizes are 15-35 mm, and density is 160-180 kg/m3), and placing in a mold; (2) adding industrial MgCl2 and water; (3) adding H3PO4 and HBO3, and stirring uniformly; (4) adding light-burned MgO, stirring uniformly, and adding H2O2 during stirring to obtain a gel material; (5) pouring the gel material into a mold; (6) covering the lid, and curing naturally; (7) demolding, and maintaining. The fireproof and heat-insulating board has such advantages as low weight, high strength, high impact resistance, no deformation, good heat, sound, fire and water resistance, and good processability.

The invention belongs to the technical field of building materials, and particularly relates to a solid waste unfired ceramsite, a preparation method thereof, foam concrete and a light partition board. The solid waste unfired ceramsite provided by the invention is prepared from the following preparation raw materials in percentage by mass: 50 to 55 percent of steel slag powder, 10 to 15 percent ofore slag powder, 5 to 10 percent of cement, 1 to 5 percent of an excitant, 3 to 5 percent of a density regulator and 20 to 30 percent of water. The stacking density of the solid waste unfired ceramsite provided by the invention is 600-700kg/m<3>, the cylinder compressive strength is 8-12MPa, and the water absorption rate is 6-8%. The baking-free ceramsite foam concrete prepared from the solid waste baking-free ceramsite has relatively low density and a heat conductivity coefficient, and also has excellent compression resistance and stability.

The invention discloses a regenerated rubber matrix based combined damping plate and a manufacturing method. The regenerated rubber matrix based combined damping plate comprises a bottom layer and a damping layer, wherein the bottom layer is a steel plate; the damping layer is manufactured from modified regenerated rubber; if only one surface of the modified regenerated rubber is adhered to the steel plate, the steel plate and the regenerated rubber can form a free damping layer structure; if both surfaces of the modified regenerated rubber are adhered to the steel plate, two steel plates and the regenerated rubber can form a constraining damping layer structure; the two steel plates are different in thickness in order to avoid coincident effect within the same frequency range. The regenerated rubber matrix based combined damping plate is simple in structure; the high sound insulation effect of the steel plate is comprehensively utilized and the modified regenerated rubber material is adopted to form a large-damping constraining structural layer for inhibiting the easy-resonating performance of the steel plates, and therefore, the energy of the noise transmitting through the sound insulation plate can be reduced by more than 90%; the regenerated rubber used as the damping material can reduce the material cost of the damping plate and can also greatly reduce the pollution of the waste rubber to the environment.

The invention discloses an environmental-friendly and multifunctional recycled concrete sound barrier panel, which comprises a sound insulation panel and a sound absorption module molded on the sound insulation panel by overall casting. The environmental-friendly and multifunctional recycled concrete sound barrier panel, the sound insulation panel and the sound absorption module of the invention are formed integrally, the bonding strength is high between two panels, at the same time, a connecting reinforcement bar is used for reinforcement, the overall strength is high, and the panel is solid and reliable, thereby effectively solving the fundamental problems of insufficient sound absorption performance and inadequate sound absorption panel strength for the traditional sound insulation panel. Moreover, the reclamation technology of construction wastes is fully used to apply recycled aggregates in a sound barrier panel. The replacement rate of construction wastes to natural aggregates can be more than 50 percent. Therefore, the invention has the advantages of resource saving and excellent performance.

The invention discloses a sound absorbing and insulating screen structure. The sound absorbing and insulating screen structure comprises a first panel, a first honeycomb core, a second panel, a second honeycomb core and a third panel which are adhered in sequence; small holes are formed in the first panel; grooves are formed in both the first honeycomb core and the second honeycomb core; the height of the first honeycomb core is not greater than that of the second honeycomb core; micro-pores are formed in the second panel; the third panel is a solid panel; the small holes, the micro-pores and honeycomb lattice cavities of the first honeycomb core and the second honeycomb core form a series-connected or parallel-connected Helmholtz resonant cavity structure, so that the frequency bandwidth of a sound absorbing structure is widened; the third panel and the Helmholtz resonant cavity structure form a composite Huygens Fresnel theory sound insulating structure. According to the sound absorbing and insulating screen structure, the problems that the conventional sound absorbing and insulating screen structure is low in rigidity, narrow in sound absorbing/insulating frequency band and difficult to clean and maintain are solved by adopting a composite material panel/honeycomb core sandwich structure, designing a multilayer series-connected/parallel-connected honeycomb sandwich structure and designing grooves in the side surfaces of the honeycomb cores.

The invention provides a spacecraft ultra-quiet environment simulating and testing system, which includes a crane, a sound absorbing structure, a sound insulation wall, a mass block, an air spring isolator, a vibration isolation track, a laboratory ground base, a sound insulation door, a maintenance channel, a vibration isolation channel, and a fine sand cushion. The sound insulation wall and the laboratory ground base are connected through the vibration isolation track; the mass block and the laboratory ground base are connected through the air spring isolator; the sound absorbing structure and the sound insulation wall are fixedly connected; the crane is located above the mass block; the internal part of the laboratory ground base is provided with the maintenance channel; the sound insulation wall and the sound absorbing structure are connected; the vibration isolation channel is connected with the fine sand cushion. The system of the invention is capable of increasing isolation effect of ground vibration and transverse vibration, increasing the sound insulation effect of the wall, enhancing the isolation effect of air and sound, effectively reducing the background noise in a testing area, meeting the background noise requirement in micro-vibration test and the environmental interference suppression requirement, increasing the isolation effect of the testing area to sounds of solid objects and providing advanced micro-vibration testing means to a high precision large scale spacecraft.

The invention relates to an internal and external molded wood-bamboo hollow plate with the characteristics of high strength, remarkably improved swelling rate of water absorption, good sound isolation and heat insulation effect, and high decorating effect of arc molding on the surface. According to the technical scheme of the invention, the internal and external molded wood-bamboo hollow plate comprises a hollow plate body, wherein the hollow plate body is formed by overlapping and bonding a plurality of chip units, each chip unit is formed by extruding and bonding wood-bamboo chips and an adhesive; the length and height of each chip unit are identical to the width and thickness of the hollow plate respectively; and a plurality of holes are formed in the hollow plate body. The hollow plate is characterized in that at least one row of notches and bumps are staggered on each chip unit, and all notches and bumps between two adjacent chip units are embedded one another and bonded to form the molded hollow plate. The method for manufacturing the internal and external molded wood-bamboo hollow plate comprises the following steps: 1) preparing materials; 2) drying; 3) screening; 4) applying the adhesive; and 5) extruding and molding.

The invention relates to a cab design method based on a cab sound reduction index analysis. The cab design method comprises the following steps: (1) establishing a CAD (Computer-Aided Design) model of a cab assembly, carrying out mesh generation on the CAD model, and establishing a finite element model of the cab assembly; (2) based on the finite element model of the cab assembly, establishing a cab internal sound field and a cab external sound field; (3) according to the shape of a sealing strip in a current design drawing, establishing a finite element model of the sealing strip structure, and carrying out nonlinear static compression on the sealing strip according to a set amount of compression; (4) establishing a sound-solid-sound three-domain coupling model; (5) computing the sound reduction index of the cab; (6) judging whether the sound reduction index of the current cab meets the design requirement, if yes, taking the current design drawing as the final structure output of the cab, and otherwise modifying the shape and the amount of compression of the sealing strip in the design drawing, and returning to the step (3). Compared to the prior art, the cab design method disclosed by the invention has the advantages of reducing the internal noise of the cab, increasing the sound reduction index of the cab, improving the sealing performance, and the like.

The invention relates to a broadband ventilation and sound insulation window unit structure and application thereof. The broadband ventilation and sound insulation window unit structure includes an inner spiral blade (1), a hollow tube (2) and a thin-walled shell (3); the outer wall of the hollow tube (2) is fixedly connected with the inner spiral blade (1); the thin-walled shell (3) is arranged at the outer edge of the inner spiral blade (1) in a covering manner; the inner spiral blade (1) includes a fixed spiral layer (5) and horn-shaped spiral layers (4), wherein the fixed spiral layer (5)is arranged around the center of the outer wall of the hollow tube (2), and the horn-shaped spiral layers (4) are mounted on two sides of the fixed spiral layer (5); a spiral blade of the fixed spirallayer (5) is a blade with a fixed pitch; and a spiral blade of each horn-shaped spiral layer (4) is a spiral blade with a gradient change in pitch. Compared with the prior art, the broadband ventilation and sound insulation window unit structure has the advantages that the sound insulation effect is improved, the application range is wide, and the like.

The invention discloses an environment-friendly sound insulating high speed train floor structure, and relates to the field of railway vehicle floors. A free sticking elastic damping material is sprayed on the upper surface of a web plate of a floor aluminum profile; the inner chamber of the floor aluminum profile is filled with a polyurethane sound absorption material; the upper surface of a top plate of the aluminum profile and lower supports are bonded with the sticking elastic damping material; the upper part of the sticking elastic damping material is bonded with a restraint layer aluminium plate; the upper part of the floor aluminum profile is bonded with the lower supports; the lower supports and upper supports are connected through rubber cushions; a cold-proof material is laid between the restraint layer aluminium plate and a sound insulation cushion; the sound insulation cushion and an aluminium plate form an entirety, and then the entirety is bonded with the elastic supports; the upper part of the aluminium plate is bonded with foaming aluminium; the upper part of the foaming aluminium is bonded with the aluminium plate. According to the invention, through the improvement of the structure of the floor, the integral rigidity of the system is reduced, and the sound insulation amount is improved, through the simulation of the test result, the thickness of the plate is specified, the vibration damping noise reducing performance can be optimized, and meanwhile the development requirement of light weight of the vehicle body can be met; on the aspect of vehicle body floor material selection, the novel environment-friendly energy-saving material is preferentially selected.

The invention discloses a polypropylene modified sound insulation composite material and a preparation method thereof. The polypropylene modified sound insulation composite material comprises, in weight percent, 33.8%-88.8% of polypropylene, 10%-60% of modified talcum powder, 0.2% -2% of antioxidants and 1%-6% of additives. The composite material mainly takes the modified talcum powder as a raw material, the modified talcum powder after intercalation modification in a supercritical carbon dioxide state is of a laminated structure in a polypropylene substrate, polymer macromolecules easily enter in the production process of the modified talcum powder, the stripping degree of the modified talcum powder in polypropylene is greatly improved, the reflection frequency of the same weight parts oftalcum powder for sound waves is increased, the composite material has excellent sound insulation effects and better stiffness increasing effects, and sound absorption and sound insulation performances of the composite material are improved.

The invention discloses a novel built concrete structure building wall and a construction method thereof, and belongs to the technical field of buildings. The wall is mainly formed by piling up bearing self-insulation main building blocks, at least one structural column formed by pouring concrete into a U-shaped cavity formed by self-insulation auxiliary building blocks is also arranged in the wall, and a vertical steel bar connected with a bottom ring beam is arranged in the structural column; the bearing self-insulation main building blocks are in cuboid structures, the building block body is provided with two cavities communicated with the upper and lower surfaces thereof along the width direction, and insulation materials are filled in the cavities respectively; and the self-insulation auxiliary building blocks form U-shaped insulation on the outer side of the structural column. Organic combination of an invisible framework formed by the structural column and the ring beam in an outer masonry and a building internal framework structure can be realized, the seismic resistance of the building can be greatly improved, and simultaneous construction of insulation and structure is realized, so the construction process is reduced, a template is saved, the construction efficiency is improved, and the project cost is reduced.

The invention relates to a novel combined type floor slab and a construction method thereof. The novel combined type floor slab structurally comprises a CLT (Cross Laminated Timber) plate, a concreteplate and self-tapping screws, wherein a plurality of concave grooves are formed in the CLT plate at intervals; the tail parts of the self-tapping screws are fixedly connected into the concave grooves; the heads of the self-tapping screws are exposed out of the CLT plate; the concrete plate is poured onto the CLT plate and the self-tapping screws. According to the novel combined type floor slab provided by the invention, the concave grooves and the self-tapping screws are distributed on the interface of the CLT plate and the concrete plate, so that the CLT plate and the concrete plate have thecommon effect and the rigidity and the bearing capability of a wooden ceiling can be improved, the vibration absorption and sound insulation properties of the wooden ceiling are improved and the fireproof performance of the wooden ceiling is improved; a floor slab solution is provided for developing a wooden structure toward high-rise buildings.