35results about How to "Improve sound absorption and noise reduction effect" patented technology

The invention discloses a combined type integrated box room and belongs to the technical field of movable rooms. The combined type integrated box room comprises a standard box body room, a main frame of the standard box body room comprises stand columns and beams, and the main frame is formed by welding rectangular tubes. Peripheral wall plates embedded into the main frame are fireproof plates, and a bottom plate is a fiber cement pressure plate. A top plate comprises an inner-layer fireproof plate which is horizontally laid and an outer-layer waterproof plate which is obliquely laid. The top beam of at least one side of the standard box body room is a gutter beam. The combined type integrated box room has the better bearing capacity, the fireproof performance, the heat insulation property and the sound absorption and noise lowering effect, installation is convenient, the plate shape is beautiful, construction operation is simpler and faster, and working efficiency is improved.

The invention relates to sound absorbing cotton, in particular to nonwoven cloth sound absorbing cotton containing graphene. The nonwoven cloth sound absorbing cotton is composed of a top face layer, a back layer and a fiber cotton layer clamped between the top face layer and the back layer, the top face layer and the back layer are made of nonwoven cloth, and the nonwoven cloth is formed by, by weight, 100 parts of isotactic polypropylene, 5-7 parts of vinyl acetate, 2-3 parts of acrylic acid-2-hydroxy propyl ester, 1-2 parts of isocyanate, 4-5 parts of silica, 2-3 parts of sodium tripolyphosphate, 12-15 parts of epoxidized soybean oil, 1-2 parts of graphene, 1-2 parts of cetyl trimethyl ammonium bromide, 3-4 parts of radix isatidis, 1-2 parts of dyer woad leaf, 2-3 parts of houttuynia cordata and 4-5 parts of auxiliary through a melt-blowing method. The nonwoven cloth which is excellent in mechanical performance and dense in cloth quality is taken as an outer layer material, so that leakage of interlayer fiber cotton is effectively prevented, effect of environment friendliness and safety, heat resistance and flame retardancy, sound absorbing and denoising and the like is realized, and the nonwoven cloth sound absorbing cotton is wide in application prospect.

The invention relates to a nonwoven material, in particular to a wear-resistant heat-insulating nonwoven material for sound absorbing cotton. The nonwoven material is made from, by weight, 100 parts of isotatic polypropylene, 2-3 parts of nano-silica, 1-2 parts of hollow glass microspheres, 1-2 parts of rutile titanium dioxide, 7-9 parts of smoke sheet rubber, 12-15 parts of dimethyl fumarate, 2-3 parts of calcium stearate, 6-9 parts of zeolite, 3-4 parts of diatomite, 8-10 parts of activated carbon, 2-3 parts of humifuse euphorbia herb, 1-2 parts of scutellaria baicalensis, 1-2 parts of pueraria and 4-5 parts of auxiliaries. The nano-silica, the hollow glass microspheres and the like are contained in the nonwoven material, so that mechanical properties of the material are enhanced, and the nonwoven material is flexible, wear resistant, resistant to stretching and impact, heat-insulating and breathable; sound absorption and noise reduction effect of the material is improved by the aid of the zeolite, the diatomite, the activated carbon, Chinese medicinal herb fibers and the like; after being subjected to multi-layer superposition, the nonwoven material can be made into the sound absorbing cotton, and the nonwoven material is simple in process and broad in application prospect.

The invention relates to a non-woven sound absorption material, in particular to a hollow carbon ball-styrene-acrylic composite emulsion coated polypropylene-based non-woven sound absorption material for automotive interior trimming. The hollow carbon ball-styrene-acrylic composite emulsion coated polypropylene-based non-woven sound absorption material is prepared by, by weight, raw materials including 2-3 parts of polyvinyl acetal, 12-15 parts of ethylene-butylene copolymer, 22-26 parts of polypropylene, 3-4 parts of oxidized starch, 2-3 parts of ethylene glycol dimetacrylic acid ester, 1-2 parts of sodium alginate, 2-3 parts of silane coupling agent kh550, 3-5 parts of carbon nano-particles, 1-2 parts of antioxidant 1010, 12-15 parts of aluminium oxide of 400-600 meshes, 0.1-0.2 part of nano hollow carbon balls, 1-2 parts of nanometer silicon, 12-14 parts of styrene-acrylic emulsion with 8%-10% solid content and 1-2 parts of additive. The hollow carbon ball-styrene-acrylic composite emulsion coated polypropylene-based non-woven sound absorption material does not pollute the inside environment of an automobile, is flame-retardant and abrasion-resistant, meanwhile is easy to absorb and degrade and is a novel practical automotive sound absorption material.

The invention discloses a light high-strength sound barrier cement board for an expressway, and belongs to the technical field of expressway sound barriers. The light high-strength sound barrier cement board for the expressway comprises a front face mounting plate, a back face mounting plate, a light high-strength cement board and a plurality of silencing shells; a sound absorption cavity is formed between the back face mounting plate and the front face mounting plate; the light high-strength cement board is arranged in the sound absorption cavity; the plurality of silencing shells are arranged on the front face mounting plate to form a silencing shell array, each silencing shell is provided with a silencing cavity and a silencing inlet communicated with the silencing cavity, and the silencing inlet of each silencing shell deviates from the front face mounting plate; and a silencing dissipation space is formed between the outer surfaces of the plurality of silencing shells and the front face mounting plate. According to the light high-strength sound barrier cement board for the expressway, effective energy consumption reduction and sound attenuation are conducted on sound waves, sound absorption is conducted at the same time, the energy of the sound waves conducted to a sound barrier can be greatly reduced, and the sound absorption and attenuation effect is effectively improved.

The invention discloses a sound screen board and a sound barrier using the same. A sound screen board comprises a rectangular outer shell body and a sound absorbing body, wherein the rectangular outershell is composed of a panel, a back board, and a side board, and the sound absorbing bodyfillsthe interior of the outer shell body;in the assembly process of the sound screen board, the use of rivets is omitted, the appearance is more aesthetic, automatic continuous production can be realized, using of manpower is reduced, production efficiency is greatly improved, and finished products are decreased;in terms of using performance, the corrosion of riveting joints can be avoided, and the overall fixing strength can be ensured. In the assembly structure of the sound screen board, the top of the outer shell body is in the structural form of an upper flanging groove covering an upper clamping part, and an overlap joint slit is vertically formed, and a vertical upper clamping part is arrangedon the inner side of the lap joint slit for protection, so that rainwater does not enter into the outer shell body, thus the problemsof corrosion of the sound screen board and uneven filling caused by sinking of the sound absorbing body are avoided, the service life of the sound screen board is prolonged, and the sound absorption and noise reduction effects are further improved.A sound barrier has the using and producing advantages of the sound screen board.

The invention relates to a multi-frequency sound absorption type acoustic superstructure. The superstructure comprises a plurality of sound absorption units connected in sequence, wherein a cavity is formed in each sound absorption unit, the cavities in every two adjacent sound absorption units communicate with each other through an open hole, and a first open hole is further formed in the first sound absorption unit and communicates with the cavity in the sound absorption unit. The superstructure is advantaged in that the multiple sound absorption units are arranged, each sound absorption unit forms one Helmholtz resonant cavity through the cavity and the opening, each sound absorption unit is equivalent to one Helmholtz resonant cavity, multiple sets of absorption peaks can be generated by combining the cavities of the multiple different units, almost perfect sound absorption can be achieved for multiple sets of frequencies, and the sound absorption and noise reduction effects are improved.

The invention provides a wear-resistant and heat-insulated non-woven fabric material for sound absorption cotton. The non-woven fabric material is prepared from, by weight, 100 parts of isotatic polypropylene, 2-3 parts of nano-silicon dioxide, 1-2 parts of hollow glass microspheres, 1-2 parts of rutile-type titanium dioxide, 7-9 parts of smoke sheet rubber, 12-15 parts of dimethyl fumarate, 2-3 parts of calcium stearate, 6-9 parts of zeolite, 3-4 parts of diatomite, 8-10 parts of activated carbon, 2-3 parts of humifuse euphorbia herb, 1-2 parts of radix scutellariae, 1-2 parts of kudzuvine roots and 4-5 parts of auxiliaries. According to the wear-resistant and heat-insulated non-woven fabric material for the sound absorption cotton, due to the fact that the raw materials such as nano-silicon dioxide and the hollow glass microspheres are contained, the mechanical property of the material is enhanced, and the material achieves the flexibility, wear resistance, stretch resistance, impact resistance, heat insulation and air permeability; by adding the raw materials such as the zeolite, the diatomite, the activated carbon and Chinese herb plant fiber, the sound absorption and noise reduction effects of the material are improved. The sound absorption cotton can be made by stacking multiple layers of non-woven fabrics, the processes are simple, and the application range is wide.

The invention discloses a template machine for clothing. The template machine for clothing comprises a machine body and a working table, wherein the working table is positioned on the upper portion ofthe machine body; a heat-dissipation pipe is mounted on the inner wall of the machine body; a ventilating fan is mounted on one side of the upper portion of the machine body; a refrigerating pipe isarranged on the other side of the upper portion of the machine body; the ventilating fan communicates with the refrigerating pipe through the heat-dissipation pipe; a water-cooled tube is inlaid on the inner wall of the heat-dissipation pipe; the outer side of the bottom of the machine body is fixedly connected with a water-cooled heat sink; the water-cooled heat sink is connected with the water-cooled tube; a refrigerating plate is mounted in the refrigerating pipe; and one side of the outside of the refrigerating pipe is in clamped connection with a blowing fan. By arrangement of the blowingfan and the refrigerating pipe, the heat-dissipation property of the template machine is improved effectively, by arrangement of a U-shaped clamping column and a pressure lever, a clothing template is convenient to fix, convenient to assemble and disassemble and convenient to use, by arrangement of a noise-reduction interlayer, the noise-reduction property of the machine body is improved effectively, noise trouble and damage are avoided, and the template machine for clothing is suitable for being popularized and used widely.

The invention discloses a radial multidirectional dispersed sound-absorbing material, and belongs to the field of sound absorbing materials; according to the radial multidirectional dispersed sound-absorbing material, on one hand, sound waves are converted into the vibration force of slow vibration rods; under the vibration effect of the slow vibration rods, the slow vibration rods are in a radialshape, so the sound is transmitted into the sound-absorbing material along the continuously changing direction of the slow vibration rods, and through similarly breaking up the entirety into parts, the sound can be differentiated; further, the sound absorption and noise reduction effects of the sound-absorbing material are obviously improved. On the other hand, when the sound is transmitted to the slow vibration rods; sound propagation speed is reduced, the time of sound in the sound-absorbing material is prolonged, and furthermore, the effect of sound consumption is achieved, so that sound absorption effect is better; and meanwhile, the upward vibration amplitude of the slow vibration rods can be effectively increased by matching with the effect of a differentiation-assisting fixed ball,so that the differentiation range of the sound-absorbing material to the sound is larger, and the sound absorption effect of the sound-absorbing material is further improved.

The invention provides a noise reduction device of a refrigerator, and relates to the field of refrigerators. The noise reduction device of the refrigerator comprises a box body and an operating box.The inner bottom of the operating box is fixedly connected with a compressor. The right side of the compressor is provided with a sound absorbing plate. The outer surface of the sound absorbing plateis fixedly connected with sponge rubber. The right side wall of the operating box is fixedly connected with a fixed seat. The right side of the fixed seat is provided with a threaded groove. The threaded groove is internally connected with a mounting rod in a threaded mode. According to the noise reduction device of the refrigerator, by arranging the sound absorbing plate, the sponge rubber, a sealing pad and a semi-circular cover, the sound absorbing plate and the sponge rubber operate jointly, damping and heat isolating are achieved while the sound absorbing and noise reduction effects are improved, the sealing pad improves the sealing effect of structure connecting to reduce overflow of noise, and the semi-circular cover gathers and absorbs the noise; and by arranging a fixed sleeve, acold water pipe and a buffer pad, vibration of the noise is transmitted to water in the cold water pipe for absorbing buffer, and the buffer pad further conducts counteracting.

The invention relates to a preparation method of a super-strong sound insulation building decoration material. The preparation method comprises the following construction steps that A, a sound insulation metal layer is prepared; B, the interior of the sound insulation metal layer is coated with a sound insulation adhesive layer; C, a sound insulation fiber cloth layer is bound on the sound insulation adhesive layer; D, a sound insulation core layer is poured on the upper portion of the sound insulation fiber cloth layer; E, in the solidification process of the sound insulation core layer, a sound insulation plate layer is prepared; F, the upper surface of the sound insulation board layer is coated with a sound insulation viscous layer; G, a decorative layer is bound on the sound insulation adhesive layer in the step F; H, the lower surface of the sound insulation board layer is coated with a sound insulation viscous layer; and I, the lower surface of the sound insulation plate layer is bonded with the solidified sound insulation core layer through the sound insulation adhesive layer. The invention further relates to production equipment for preparing the super-strong sound insulation building decoration material. The preparation method is simple in step and high in efficiency; and the production equipment is simple in structure, convenient to operate and high in production efficiency, and the labor use cost is reduced.

The invention discloses a sound absorption fence for civil construction. The sound absorption fence comprises a base, a fixing frame and soil penetrating cones, wherein the soil penetrating cones are arranged on the lower side of the base at equal intervals, the fixing frame is arranged on the upper side of the base, a reflective sticker is arranged on the outer side of the fixing frame, a panel is arranged at the upper part of the fixing frame, a sound blocking arc plate is arranged on the upper side of the fixing frame, a cavity is integrally formed in the inner side of the sound blocking arc plate, a water spraying pipe is arranged on the upper side in the cavity, and spray heads are symmetrically arranged on the lower side of the water spraying pipe. By means of the sound blocking arc plate and the cavity, when the sound absorption fence for civil construction is used, the upper side of the fence effectively blocks noise through the sound blocking arc plate, the noise is prevented from being transmitted to the periphery of a construction site from the upper side of the fence, and the sound absorption and noise reduction effects are improved.

The invention discloses a bubble curtain/foam board composite noise reduction method for underwater sound absorption and noise reduction. The method comprises the following steps: enabling bubbles to move upwards between two opposite porous surfaces of two foam boards to form a bubble curtain, and realizing the combination of bubble curtain noise reduction and foam material noise reduction. By means of the porous surface of the foam board, bubbles can be continuously refined through collision of the foam board and the foam board in the bubble rising process, and therefore the sound absorption and noise reduction effects of the bubble curtain are further enhanced; and the foam plate can support the bubble curtain, the influence of airflow and water flow on the bubble curtain is weakened, and the noise reduction effect is stabilized.

The invention relates to an automobile clutch housing, and belongs to the technical field of automobile parts. The invention aims to solve the technical issue that the usage effect and the service life cannot satisfy demands when a present automobile clutch housing is used. To solve the above technical issue, the technical scheme adopted by the invention is that the automobile clutch housing comprises a housing main body and a cavity in the housing main body, the cavity is provided with mounting holes, a locating pin hole and a weight reducing groove, a reinforcing column is disposed at the periphery of each mounting hole in housing main body, the inner wall of the housing main body is provided with a noise reduction layer, and the lower portion of the housing main body is provided with heat dissipating holes. The clutch housing is reasonable in structure, long in service life and high in work performance.