40results about How to "Reduce traffic noise" patented technology

A non-wool sound screen with engaged cavities and sound absorptive surfaces is composed of two aluminium fibres sheet layers as surficial layers, two empty cavity layers, two microhole plat layers, a toothed cavity, folded partion, and fixing frame. Its advantage is high effect to decrease noise.

The invention relates to a whole image sound barrier for an urban quick lane and a tunnel portal. The sound barrier is characterized by consisting of gate-type arc steel arch racks arranged in the upper space of a pavement, and a sound barrier main body framework consisting of rigid tie rods for connecting the adjacent arch racks and cross supporting rods, wherein purlines are arranged on the main body framework; and meanwhile, the purlines arranged on the main body framework are used as supports, anti-collision wall contact faces are formed symmetrically on the left and right sides along the central axis of the sound barrier till the pavement, and a sound absorber, a ventilated exhaust part, a sound absorber, a lighting part, a sound absorber and a lighting part are arranged at intervals, so that a full-closed for semi-closed whole image sound barrier structure capable of totally isolating direct sound is formed for a road. The whole image sound barrier for the urban main road can effectively reduce the traffic noise of the urban main road, effectively reduce the reverberation in a sound barrier area and ensure the safety and the comfort degree of a road user, and is a sound barrier suitable for a building dense area nearby the urban main road.

A method for constructing rubber particles asphalt concrete road surfaces relates to a method for constructing asphalt concrete road surfaces, aiming to resolve the problems that: the asphalt concrete road surfaces have weak wear-resistant, and the attachment coefficient and the adhesive force are reduced and vehicles have the problem of braking stability when the road surfaces are covered by snow and ice. The construction method comprises the following steps that: compositions by weigh percentage of the following materials are adopted: 76.5 to 91.5 percent of mineral aggregate, 2.5 to 7.5 percent of asphalt, 4 to 10 percent of mineral powder and 2 to 6 percent of rubber particles; the mineral aggregate is heated up to 190 to 200 DEG C, the rubber particles are added into the mineral aggregate with mixing about 20 to 25 seconds, the asphalt heated up in advance and the mineral powder are added into the rubber particles and the mineral aggregate with mixing lasting for 70 to 80 seconds, and then the road surfaces are subject to the pavement, the first stage initial pressure, the first and the second stage re-pressure and the second stage final pressure. The invention can increase the deformation capabilities of the road surfaces effectively, improve the bond state between the road surfaces and snow, and the invention can improve the attachment coefficient, increase the adhesive force, and improve the braking and turning operation stability of vehicles when the road surfaces are cover by snow and ice.

The invention discloses a railway noise controller which is installed on a rail, belonging to noise control field. The noise controller comprises a restraint layer member, a damp layer, a pin roll, a mass block, a retainer pin, a dynamic vibration absorber shell, a wedge-shaped block and an elastic layer. The damp layer is installed at the waist, the flange and the bottom of the rail, and is fixed by the restraint layer member and the dynamic vibration absorber shell. The restraint layer member and the dynamic vibration absorber shell are connected through the pin roll, and the wedge-shaped block exerts clamp force to the restraint layer member and the dynamic vibration absorber shell. The dynamic vibration absorber shell of the mass block is installed at the bottom of the rail and the mass block is connected with the shell through the elastic layer. The railway noise controller effectively reduces noise of the rail in aspect of the noise source. The railway noise controller can be installed on the rail and requires no bond for adhibiting, and is low in cost and convenient to maintain. The restraint layer member, the pin roll, the mass block, the retainer pin, the dynamic vibration absorber shell and the wedge-shaped block can be used repeatedly, and the damp layer and the elastic layer are convenient to replace.

The invention relates to a plant configuration used for urban road traffic noise reduction. Configured plants comprise evergreen tree species, deciduous tree species, evergreen shrub species, deciduous shrub species and a lawn, wherein the evergreen tree species comprise Cinnamomum camphora and Ligustrum lucidum; the deciduous tree species comprise gingko, Zelkova serrate and Prunus cerasifera; the evergreen shrub species comprise sweet-scented osmanthus and oleander; the deciduous shrub species comprise Hibiscus syriacus L, Chinese redbud, flowering peach and multiflora rose; and the lawn is a Manila lawn. The evergreen tree species, the deciduous tree species, the evergreen shrub species and the deciduous shrub species used for the plant configuration are called by a nursery stock and respectively come from a nursery garden. The plant configuration used for the urban road traffic noise reduction has the advantages that the environment is beautified; the service life is long; the operability is strong; the landscape property is good; the ecological value is high; the cost is low; planting and maintenance are easy; the noise reduction effect is good; and the noise reduction function is efficient. Better noise reduction can also be performed on zones of which road green belts are not sufficient or stained in width because of the limitations of geographic locations or the ambient environments, and a very good action is performed in creating an urban favorable living environment.

The invention relates to a porous foam dual-surface sound adsorption ultra-thin sound baffle, belonging to the noise control technique. It comprises: two layers of porous plates, two layers of chambers, two groups of non-fiber sound adsorption porous material, a trapezium chamber, a folded baffle plate, and the frame. Wherein, two layers of chambers are arranged between the two layers of porous plates and two groups of non-fiber sound adsorption porous material; the trapezium chamber is arranged between two groups of non-fiber sound adsorption porous material and the folded baffle plate; the frame can fix the porous plates and the folded baffle plate; two groups of non-fiber sound adsorption porous material are fixed on the folded baffle plate; each back of said groups of non-fiber sound adsorption porous plates has a group of trapezium chamber; and two groups of trapezium chambers are meshed and filled by non-fiber sound adsorption porous material. the invention can be mounted between the upper and lower rails of railway or city road or between the driveways to reduce the traffic noise.

A plastic extruded member is provided which will induce cracks in concrete and provide drainage for moisture entering the cracks. The member includes a base which sets upon the subgrade surface, with a pair of legs extending upwardly from the base. Arms extend laterally outwardly from each leg. As extruded, the legs are adjacent one another, and then spread apart as the concrete cures and shrinks, thereby inducing a substantially vertical crack in the concrete above the legs. The member includes a drain channel at the lower end of the legs. The gap between the legs which is created by the shrinking cured concrete provides a path from the crack to the drain channel for draining water entering the crack.

The invention relates to a large sound barrier suitable to a major trunk road in a city, which comprises a road-side road-bed section barrier, a road-side bridge-bed section barrier, an in-road road-bed section barrier and an in-road bridge-bed section barrier. The large sound barrier is characterized in that the two barriers of road-side and in-road are arranged for reducing noise based on the characteristics of wide road, large traffic flow and high noise value in the major trunk road in the city, the height of the road-side road-bed section barrier is not more than 6.5m, the height of the road-side bridge-bed section barrier is not less than 5.35m, the height of the in-road barriers is not less than 4.35m, and extending lengths of two ends of the barriers exceed sensitive spots by 70m respectively; foundations of the road-bed section barriers adopt a combination structural mode of U-shaped piles, bearing platforms, upright posts and connecting walls; foundations of the bridge-bed section barriers adopt a structural mode that U-shaped pieces and opposed bolt plant gum are fixed on anti-collision piers; materials of the barrier consist of perlite, foamed aluminum plates or aluminum fiber boards, and microperforated plates; structures of the barriers adopt a mode of straight screens and top sound absorbing cylinders, and adopt a combination mode of sound absorbing screens with single-faced foamed aluminum plates, double-faced foamed aluminum plates, or single-faced aluminum fiber boards and double-faced aluminum fiber boards according to the demands of noise source and surrounding road conditions.

The present invention relates to a photovoltaic soundproof wall having a plurality of soundproof members each formed by surrounding the edge portions of two transparent sheets with a main frame and a plurality of posts adapted to mount the plurality of soundproof members therebetween, the photovoltaic soundproof wall including: a subframe disposed inside the main frame; a motor disposed inside the subframe for rotating a drive shaft rotatably mounted inside the subframe; a power transmission unit adapted to transmit the rotary force of the motor; a plurality of slats spaced apart from each other vertically between the two transparent sheets in such a manner as to be moved collectively by the power transmitted from the power transmission unit; and a plurality of solar cells attached to the top surface of each of the plurality of slats.

The invention provides a rotary compressor. The rotary compressor comprises a compressor body (10) and an enthalpy increase pipe assembly (20) connected to the compressor body (10). A ratio of a pore cross-section of an input terminal of an enthalpy increase pipe (21) in the enthalpy increase pipe assembly (20) to that of an enthalpy increase pore (16) is 0.7-1.2, and the enthalpy increase pore has a diameter of 0.1-3.0 mm. The rotary compressor of the invention can increase a unit suction intensity of the compressor under ultralow temperature, enhance lubrication and cooling functions of an internal pump body and a motor of the compressor, and improve reliability of the compressor.

The invention discloses a municipal denoising isolation belt. The municipal denoising isolation belt comprises uprights, wherein the portions, close to the bottoms, of the uprights are of cavity structures; corrosion-resistant material filling layers are arranged in the cavities; illuminating apparatuses are mounted at the tops of the uprights; the illuminating apparatuses are controlled by a master control platform; the number of the uprights is two; a sound absorbing column is mounted between the two uprights; the sound absorbing column is of a concave structure; two side surfaces of the sound absorbing column are connected with the uprights in a sealed manner; the bottom of the sound absorbing column is connected with the ground surface in a seamless manner; a base is mounted in the sound absorbing column; the height of the base is consistent with that of the sound absorbing column; the interior of the base is filled with a nutritious soil layer; the height of the nutritious soil layer is consistent with that of the base; planting grooves are formed in the upper surface of the base; and the number of the planting grooves is at least two. The municipal denoising isolation belt is advantaged in that the municipal denoising isolation belt is integrally stable and can also absorb heat and adsorb smoke dusts and noises; the green area can be increased; the landscape effect is improved; traffic noises of the two sides of highways and surrounding buildings can be reduced; a corrosion-resistant effect can be achieved; and an illuminating function is also achieved.

The invention discloses an active embankment top road upgrading structure and a construction method. The construction method is characterized by comprising the steps that rebars are embedded to the top of an original wave wall, and the embedded rebars are connected to form an integral formed rebar frame; a wave wall formwork of a heightened segment adopts hinged fracture surface formworks, and fixation of the formwork is achieved through shelves, symmetrical clamping plate, butt clamping threaded rods, upper symmetrical lug plates and formwork inner side supports; longitudinal joints, transverse contraction joints, transverse expansion joints and transverse construction joints are arranged on an exposed concrete pavement; the exposed concrete pavement adopts a whole face transverse formwork; a vibration strike-off beam is adopted for vibration of concrete, the vibration strike-off beam is connected with an n-shaped support through a strike-off beam hanging bracket, and the n-shaped support can walk along a support track; chutes are used for pouring the concrete; and a drainage ditch formwork adopts a separable inner formwork and hoisting formwork easily dismounting system. The construction efficiency is improved, and the construction process is simple and easy to practice. Relatively good technical and economic benefits can be achieved when the active embankment top road upgrading structure and the construction method are applied to the actual engineering.

The invention discloses a foamed aluminum sound-absorbing plate capable of effectively reducing urban traffic noises. The foamed aluminum sound-absorbing plate comprises an aluminum plate body, wherein foamed aluminum materials are adhered to the two side surfaces of the aluminum plate body; the foamed aluminum material comprises the following raw materials: aluminum scrap, deionized water, ultrapure water, absolute ethanol, a dispersant, a plasticizer, an adhesive and a foaming agent; the adhesive comprises the following raw materials: starch, polyvinyl alcohol, polyurethane, butyl rubber, vinyl acetate resin and waterborne organosilicone epoxy resin; the foaming agent comprises the following raw materials: azodicarbonamide, sodium hydrogen carbonate, carbon black, n-hexane, trichlorofluoromethane and sodium lauryl sulfate; the foamed aluminum material has the through hole porosity of 98.5-99.8% and the average through hole size of 0.75-0.85mm; the foamed aluminum materials adhered tothe two side surfaces of the aluminum plate body have the thickness of 20-25mm; the foamed aluminum sound-absorbing plate has the sound-absorbing coefficient of 0.88-0.92. The technical problems of nonuniform through pore size, relatively large through hole size and relatively low through hole porosity of the existing foamed aluminum material are solved.

The invention discloses a heat dissipation type motor for a domestic stirrer. The heat dissipation type motor comprises a front cover, a machine body and a back cover; the front cover, the machine body and the back cover are connected through flanges; multiple heat dissipation fins and heat dissipation grooves are formed in the outer wall of the machine body, and the heat dissipation grooves are formed between adjacent heat dissipation fins; multiple through holes are formed in each heat dissipation fin, and the through holes in the adjacent heat dissipation fins are symmetrically distributed;multiple grooves are formed in the outer edge of each heat dissipation fin at intervals; a motor shaft is arranged in the machine body; the back part of the motor shaft is sleeved with a fan; multiple heat dissipation holes are formed in the end planes of the front cover and the back cover; and multiple axially-distributed reinforcing ribs are uniformly arranged on the inner side wall of the backcover. The heat dissipation type motor has the characteristics of improvement of heat dissipation performance and prolonging of service life.

The invention discloses a durable ultrathin asphalt skid-resistant surface layer pavement structure and a construction method. The durable ultrathin asphalt skid-resistant surface layer pavement structure comprises a concrete pavement base course or an asphalt pavement base course, and further comprises a wheel-bonding-free interlayer bonding layer and an ultrathin asphalt skid-resistant surface layer, wherein the wheel-bonding-free interlayer bonding layer is spread on the concrete pavement base course or the asphalt pavement base course and used for preventing interlayer slippage damage, and the ultrathin asphalt skid-resistant surface layer is compacted on the wheel-bonding-free interlayer bonding layer, and the compaction thickness of the ultrathin asphalt skid-resistant surface layer is 15mm-25mm; and the ultrathin asphalt skid-resistant surface layer is prepared by adopting an open-graded hot-mix asphalt mixture in a compacted mode, the maximum particle diameter of aggregate of the ultrathin asphalt skid-resistant surface layer is not greater than 9.5 mm, and the asphalt-aggregate ratio is not smaller than 6%; and the wheel-bonding-free interlayer bonding layer is spread by adopting hot-melt type modified asphalt, the spreading used amount of the wheel-bonding-free interlayer bonding layer is 0.1-1 Kg/m<2>, and the curing time for avoiding wheel bonding is shorter than 3 minutes. According to the durable ultrathin asphalt skid-resistant surface layer pavement structure and the construction method, the skid-resistant property is good, the durability is good, the smoothness of a pavement is good, and the traffic noise can be reduced effectively.

The invention relates to the field of buildings and discloses a sound insulation and noise reduction structure for effectively reducing the urban light rail traffic noise. The sound barrier structuresare additionally arranged at the two sides of a light rail, each sound barrier structure comprises two metal perforated plates, and the metal perforated plates are arc-shaped. The lower parts of thetwo metal perforated plates are respectively fixed on the light rail, and the upper parts of the two metal perforated plates are bent towards the light rail but are not connected with each other. Oneside, far away from the light rail, of one metal perforated plate is coated with a porous sound absorption material, and one side, far away from the light rail, of the other metal perforated plate iscovered with the green plants. The sound barrier structures are additionally arranged at the two sides of the light rail, and the sound waves can be absorbed or reflected through the sound barrier structures, so that the noise propagation is stopped.