137results about How to "Good sound absorption and sound insulation" patented technology

The invention relates to an autoclaved aerated concrete block and a manufacturing method thereof, belongs to the technical field of building materials, and aims at solving the problems of high manufacturing cost and poor quality of products of the autoclaved aerated concrete block in the prior art. The autoclaved aerated concrete block comprises main materials, water and a foaming agent; the main materials include the following components (in percentage by weight): 65%-75% of tailing sand, 8%-12% of quick lime, 15%-18% of cement, and 2%-5% of gypsum; the material-to-water ratio ranges from 0.57 to 0.62; the foaming agent is added proportionally by 500g/m3 according to the total volume of the materials. The autoclaved aerated concrete block has the advantages of low manufacturing cost, convenient construction, environmental protection and energy conservation; the block further has the advantages of low weight, high heat retaining property, high anti-permeability, good fireproof performance, good sound insulation and sound absorption properties, accurate size, high strength and no radioactivity.

The invention discloses an integral type thermal insulation building, which belongs to the technical field of building engineering. The problem to be solved is to provide the integral type thermal insulation building. The adopted scheme is that the integral type thermal insulation building at least uses one of an inorganic thermal insulation structure layer and an inorganic thermal insulation layer, wherein the inorganic thermal insulation structure layer is formed by combining one or two of inorganic thermal insulation load-bearing concrete and inorganic thermal insulation load-bearing building blocks; and the inorganic thermal insulation load-bearing concrete comprises the following components in a mixing weight ratio (kg/m<3>) of concrete composite light bone admixture to cement to sandto stone to porcelain granule to fly ash to water to concrete admixture of (6-225):(200-800):(300-700):(500-1,600):(150-650):(10-600):(80-400):(0.1-200). The integral type thermal insulation buildingcan be widely applied to the technical field of buildings.

The invention relates to a sintering expansion type light ceramsite produced by using oily sludge and a manufacture method of the sintering expansion type light ceramsite. The manufacture method is characterized by comprising the following steps of: uniformly mixing raw materials including oily sludge, building waste residue, waste energy-saving lamp residue, boiler waste residue, wood material processing waste residue, calcium oxide, calcium sulfate, carboxymethylcellulose, calcium carbonate, ferric sulfide, a polycarboxylate superplasticizer, ferrous sulfate, magnesium sulfate and water by using a dual-shaft mixing and stirring machine, manufacturing into spherical particles with diameters of 5-20mm by using a disc pelletizing machine, drying, roasting by using a dual-cylinder rotary kiln, controlling the temperature to be 1,050-1,200 DEG C and the time to be 10-25 minutes, cooling and discharging from the kiln, then screening and manufacturing to be a sintering expansion type light ceramsite product. The sintering expansion type light ceramsite product has the advantages and effects of being light in weight, preserving and insulating heat, absorbing and insulating sound, comprehensively utilizing and recycling solid waste resources, and being free of pollution, low in cost and good in benefit, and accords with the requirements of saving energy, reducing emission, protecting environment and developing low-carbon economy in China.

The invention discloses a soundproof cover of a compressor, the compressor and an air conditioner outdoor unit. The soundproof cover of the compressor comprises a perforation board and a soundproof plate, wherein a porous sound absorbing layer is arranged between the perforation board and the soundproof plate; the porous sound absorbing layer is 5-60mm thick, and the soundproof plate is 1-2mm thick. The soundproof cover of the compressor disclosed by the invention has an excellent sound isolating and absorbing effect, can absorb wide frequency noise radiated by the compressor, reduces the integral OA value, also can absorb noises at a special fundamental frequency and the frequency doubling noises thereof, and reduces the frequency doubling noise peak of the compressor. The sound waves offrequency bands sent by the compressor firstly arrive the perforation plate, enter the porous soundproof layer through the perforation board and reflect back and forth between the perforation board and the soundproof plate. The soundproof layer is holes penetrating one another inside and is subjected to air molecular friction and viscous resistance. The sound energy is converted into heat energy through inner friction of air molecules and mechanical vibration of fine fibers, so that the purposes of absorbing sounds and reducing noises are achieved.

The invention belongs to the technical field of functional materials, and discloses a composite sound insulation material comprising cellulose fibers and nanofibers and a preparation method of the composite sound insulation material. The composite sound insulation material is obtained by compounding a composite fiber layer composed of natural cellulose fibers and nanofibers. The nanofibers are prepared by electrospinning. According to the invention, by combining the nanoscale fibers and the natural cellulose fibers, which are obtained through the electrospinning, the sound insulation performance of the composite material is improved; by use of the natural cellulous fibers and the biodegradable polymer, the environmentally-friendly concept is satisfied; and the composite sound insulation material and the preparation method thereof have bright application prospects.

A hanging type insulating device of a wet electric precipitator insulating box comprises an insulating cover, an insulating box base, an insulator, a hanging rod and a cyclone disc. The insulating cover is arranged on the insulating box base through a bottom disc flange. A conical hole is formed in the center of a bottom plate of the insulating cover, and the large opening end of the conical hole faces upwards. The cyclone disc is a circular ring. A plurality of air flues are evenly distributed on the circumferential wall of the cyclone disc. The air flues are inclined air flues with the large outer ports and the smaller inner ports and are consistent in inclination direction. The cyclone disc is arranged in the conical hole of the bottom plate of the insulating cover, is coaxial with the bottom disc flange and is arranged at the upper end of the bottom disc flange. The insulator is placed at the upper portion of the cyclone disc. An air inlet is formed in the top of the insulating cover. After entering a cavity of the insulating cover through the air inlet, the hot air enters the insulating box base through the air flues on the cyclone disc, and a backspin cyclone curtain can be formed after hot air enters the insulating box base; partition is formed for an insulating box base inner cavity where wet smoke invades, the short circuit between the hanging rod with high-voltage electricity and the cavity of the insulating cover so that electric conduction can be avoided, and the short-circuit access among the hanging rod, a gland and the insulating box base is blocked.

The invention provides a method for making black sound absorption and flame retardation paper through adhesive spraying. The method comprises the following steps: mixing glass fibers and vegetable fibers through a wet papermaking technology, respectively processing an adhesive and a flame retardant and color past mixture to prepare solutions having certain concentrations, uniformly spraying the surface of raw paper with a prepared adhesive solution, and drying at a controlled drying temperature for a controlled time to guarantee the flattening and no wrinkling of dried paper. The glass fibers and the vegetable fibers selected in the invention are processed through a production technology theory of special paper to obtain black sound absorption and flame retardation paper having the advantages of high strength, strong flame retardation and uniform surface color. In the invention, the excellent performances of the glass fibers and the vegetable fibers are fully performed, and the high-quality black sound absorption and flame retardation paper which can be used in the walls of buildings as a filler is obtained through the wet papermaking technology and an adhesive spraying and drying technology in the preparation of the special paper. The method provided by the invention has the advantages of full utilization of the self characteristics of raw materials, simple preparation process, and excellent performances of finished products.

The invention provides a vitrified micro bubble heat-insulating and crack-resistant mortar, which belongs to the technical field of building mortar. The invention overcomes the defects of the prior art and provides an nontoxic and harmless, heat-insulating, sound-insulating, crack-resistant building mortar with good strength properties, the specific technical proposal is that: the vitrified micro bubble heat-insulating and crack-resistant mortar is prepared by the following materials according to mass ratio: 45-50 parts of close-hole vitrified micro bubble, 40-45 parts of cement, 8-12 parts of additive; the additive is mixed by the following materials according to mass ratio: 48-55 parts of natural glue powder, 36-42 parts of cellulose, 3-5 parts of lignin and 2-4 parts of cement retarder. The mortar provided by the invention can be widely applied to the building field.

The invention relates to a special silicon-magnesium-polymer cement acoustic panel of a road sound barrier and a preparation method thereof, belonging to a material for absorbing airborne noise. The acoustic panel is a flat rectangular solid in shape, and the frame of the acoustic panel is formed by one-step cast molding, wherein the bottom layer is closed, the surface layer is porous, and the intermediate layer is divided into double cavities and is filled with inorganic acoustic materials. The frame of the acoustic panel comprises the following component materials in parts by weight: 35-40 parts of MgO, 38-44 parts of MgCl2.6H2O, 0.5-0.6 part of H3PO4, 0.2-0.3 part of Na2PO4, 0.2-0.3 part of water-reducing dispersant NNO, 0.8-1.0 part of FeSO4.7H2O, 10-30 parts of organic polymer emulsion with the solid content of 40%, 11-13 parts of active SiO2 modifying agent, 9-11 parts of reinforcing fiber, 0.4-0.6 part of silicon aluminum waterproof structure modifying agent and an amount of water. The special silicon-magnesium-polymer cement acoustic panel has the advantages of no helogenation, no efflorescence, high strength, no deformation, good water resistance, weathering resistance, long service life and good acoustic absorption and sound insulation property. The service life of the cement acoustic panel can be more than 25 years.

The invention discloses a preparation method of a fiber material with low-frequency sound absorption and insulation functions. The preparation method comprises steps as follows: natural fibers are treated with alkali and an oxidizing agent and then are mixed with an adhesive solution, and a suspension is prepared; the suspension is poured into a mold, or an elastic film is inserted into the mold in a pouring process, and the fiber material with the low-frequency sound absorption and insulation functions is obtained. According to the preparation method, the natural fibers with wide sources and low cost are selected as raw materials and subjected to alkali treatment and oxidation treatment, paths allowing sound waves to enter the fibers are increased, then the fiber material is directly prepared from the natural fibers in a sub-fiber state under the adhesion action of an adhesive or is prepared from the natural fibers in the sub-fiber state and the elastic film, and the preparation method is simple, green, environment-friendly and low in cost; with the addition of the elastic film, not only can incident sound waves be effectively reflected, but also part of sound energy rings can be absorbed through intermolecular friction under the action of vibration load produced by sound waves, and the good sound absorption and insulation effects are realized.

The invention discloses a low-alkalinity sulphoaluminate cement gel material for house 3D printing. The low-alkalinity sulphoaluminate cement gel material is prepared from low-alkalinity sulphoaluminate cement, inorganic powder, alkali resistant glass fibers, calcium carbonate, a water reducer, a coagulation accelerator, a delayed coagulant, metakaolin, saltcake and a modifier. The low-alkalinity sulphoaluminate cement gel material has a reasonable formula, is prepared from easily available materials, has good material caking properties and good stability and has a good pump-out form keeping capability and bonding properties. A build prepared from the low-alkalinity sulphoaluminate cement gel material has low alkalinity, high early strength, fire prevention, flame retardation, water prevention, immersion resistance, sound absorption, sound insulation, thermal insulation, thermal insulation, good volume stability and super strong weatherability, and satisfies building 3D printing construction continuity and building strength requirements so that the building has good integral stability and use safety.

The invention discloses a dry method automobile acoustic absorption roof. The roof is prepared from a roof blank plate through postprocessing forming. The roof blank plate is composed of five layers of plate structures, wherein the first plate layer is prepared from glass fibers and polyethylene adhesive powder with the weight ratio being 2-2.5 to 1; the second plate layer is made from modified expanded polystyrene; the third plate layer is prepared from fiberglass modified polyethylene adhesive powder; the fourth plate layer is prepared from modified expanded polystyrene; and the fifth plate layer is prepared through glass fibers and polyethylene adhesive powder with the weight ratio being 2-2.5 to 1. Through the dry method automobile acoustic absorption roof, the weight of the dry method roof is lowered, the product lightweight is achieved, and the NVH acoustic absorption performance of the roof can be improved.

The invention discloses a stepped density melt-blown nonwoven fabric and a manufacturing method thereof. According to the stepped density melt-blown nonwoven fabric, the density is decreased gradually in a stepped mode in the thickness direction, and the density in the length direction and the density in the width direction are the same. The upper layer and the lower layer of the stepped density melt-blown nonwoven fabric are each provided with a spun-bonded fabric in a composite mode to form sound absorption materials. The obtained sound absorption materials have the good sound absorption effect at both low frequency and high frequency.

A flexible foam-filled honeycomb constrained damping sandwich structure sequentially comprises a constrained damping layer 1, a sound-insulating layer 2, a sound-absorbing layer 3, a sound-insulatinglayer 4 and a constrained damping layer 5 from bottom to top, wherein the constrained damping layer 1 and the constrained damping layer 5 are made of damping rubber bonded with a film material; the sound-insulating layer 2 and the sound-insulating layer 4 are hard fiber boards; and the sound-absorbing layer 3 is a flexible foam-filled honeycomb. The flexible foam-filled honeycomb constrained damping sandwich structure integrates sound absorption, sound insulation and damping, improves the sound-insulating and damping performance of a product, has good sound-insulating and sound-absorbing effects, has the sound-insulating amount as high as 51.2dB, and is firm and easily machine-shaped; and the preparation method is simple and feasible, and is worth of popularization and application in the market.

The invention discloses a preparation method of carbon fiber cotton capable of absorbing sound, preventing cold and preserving heat. The preparation method includes the following steps of 1, preparingcarbon fibers; 2, conducting thermal treatment on the carbon fibers and polyester fibers with a low melting point after carding, and integrating the fibers above into a whole part by means of a non-weaving mode to prepare a carbon fiber composite material layer; 3, after the carbon fiber composite material layer is cooled, compounding an antiradiation membrane layer to obtain the carbon fiber cotton capable of absorbing sound, preventing cold and preserving heat. According to the preparation method of the carbon fiber cotton capable of absorbing sound, preventing cold and preserving heat, thecarbon fiber cotton capable of absorbing sound, preventing cold and preserving heat is produced by means of the non-weaving mode. The prepared carbon fiber cotton capable of absorbing sound, preventing cold and preserving heat is low in density and heat conductivity coefficient, great in thermal insulation and heat preservation performance, excellent in sound insulation and absorption performance, inflammable and infusible in open fire and free of drops, smoke and toxic gas and meanwhile has the advantages of being waterproof and the like.

The invention discloses a fluorogypsum-based multi-component composite light high-strength wall material. The fluorogypsum-based multi-component composite light high-strength wall material comprises,by weight, 1 part of industrial fluorogypsum, 0.03-0.05 parts of cement, 0.1-0.3 parts of fly ash, 0.01-0.05 parts of an activator, 0.001-0.01 parts of a water reducing agent, 0.1-0.2 parts of waste rubber particles, 0.1-0.2 parts of ceramic particles, 0.001-0.005 parts of a foaming agent and 0.4-0.8 parts of water. Through the gelling property of fluorogypsum and the sound absorbing property of waste rubber, the light high-strength wall material with good heat insulation and sound absorption properties is produced. The preparation method realizes efficient utilization of fluorogypsum, consumes a large number of industrial wastes such as waste and old rubber tires and fly ash and has good environmental benefits.

The invention provides high-heat-insulation noise-reducing anti-radiation vacuum glass and a manufacture method thereof; the glass includes a vacuum glass basal plate, an anti-radiation coating layer and a heat-insulation heat-preservation coating layer, wherein the vacuum glass basal plate comprises a first glass substrate and a second glass substrate, the opposite surfaces of the first glass substrate and the second glass substrate are respectively coated with PVB films, the circumferences of the opposite surfaces of the two glass substrates are connected through a sealing glue and a vacuum inner cavity is formed through vacuumizing; the anti-radiation coating layer coats the other surface, opposite to the second glass substrate, of the first glass substrate; the heat-insulation heat-preservation coating layer coats the other surface, opposite to the first glass substrate, of the second glass substrate. The glass has the triple effects of heat preservation, radiation protection and noise reduction, the anti-radiation effect is good, the special heat-insulation heat-preservation coating layer is designed and provided, the coating layer composition is reasonable in collocation, the production method is easy to operate, the heat conductivity coefficient is low, and the heat preservation effect is good; moreover, the coating layer is not easy to fall off after coating, and the service life is long; and the PVB films are arranged in the vacuum inner cavity, sound insulation and sound absorption effects are good, the economic cost is low, and the use prospect is good.

The invention discloses a denoising and tail gas removing isolation room for automotive drum tests. The denoising and tail gas removing isolation room comprises a working chamber which is internally provided with a drum test platform, and the working chamber comprises two right opposite automatic doors; walls of the working chamber are sound insulation walls, and each sound insulation wall comprises a perlite sound absorption board, a vacuum glass layer and a cement and sawdust sound absorption board which are sequentially arranged from inside to outside; the portion between each perlite sound absorption board and the corresponding vacuum glass layer is filled with glass wool, and the portion between each vacuum glass layer and the corresponding cement and sawdust sound absorption board is filled with glass wool; a temperature adjusting device, a centrifugal fan, a filtering device and a three-way catalysis device are further arranged in the working chamber, an air inlet of the centrifugal fan is right opposite to the drum test platform, and an exhaust duct of the centrifugal fan is sequentially communicated to the filtering device and the three-way catalysis device. The denoising and tail gas removing isolation room is used for solving the problems of large noise pollution and tail gas pollution caused in a workshop in the existing drum test process and achieving the purposes of reducing the noise pollution and tail gas pollution in the workshop.