Hao Feng supply galvanized sheet galvanized sheet soundproof sound barrier wall can be customized to welcome you ..

When the basic definition of folding Edit this paragraph acoustic wave propagation process, meet the sound barrier, it will happen reflection, transmission and diffraction three phenomena. Usually we think that the barrier be able to stop the spread of the direct sound, and sound have sufficient attenuation transmission while transmitting sound effects can be ignored. Therefore, sound effects sound barrier noise amount may generally be said that it reflects the sound barrier above two acoustically transparent shield skills. Between the sound source and the receiving point insert a sound barrier, set up barriers infinite sonic barrier above only diffracted from the past, and in the subsequent formation of an acoustic shadow zone, as the light is blocked by the formation of a shadow as the object. In this acoustic shadow area, people can feel the noise significantly reduced, and this is the sound barrier noise reduction effect. Classification structure collapsed Edit this paragraph sound barrier fold classification according to the application environment sound barrier, sound barrier into traffic noise barriers, noise barriers noise reduction equipment, industrial plant boundary noise barriers. Sound Barrier Material classification can be divided into the following categories: metal sound barrier (metal blinds, metal mesh hole), concrete sound barrier (lightweight concrete, high strength concrete), PC sound barrier, fiberglass sound barriers. 2.7 meters wide, the widest pc plexiglass plate steel production has been positive to the Wuxi factory sound barriers installed successfully, greatly improve the visual and noise effects according to different uses can be divided into several categories: railway barrier, highway sound barriers, city landscape barrier, neighborhood noise reduction barriers. Sound barrier structure folding outdoor sound barrier generally use brick or concrete structures, interior sound barrier cited steel, wood ,, PMMA / POLYCARBONATE SHEET pull plastic, plasterboard and aluminum foam structure. Sound barrier consists of two parts of steel columns and suction insulation panel composed of members column is the main force of the sound barrier, it is fixed by bolts or welding on a road side barrier wall or rail embedded steel; absorbing insulation acoustic absorption panels are the main component, it is through high-strength spring clips to secure the H-type column groove formed sound barrier. Sound barrier design has been more fully into account the elevated highway, crash safety urban light rail, subway wind load, transport vehicles and all-weather outdoor corrosion problems. It is nice shape, producing exquisite, easy to transport, installation, low cost, long life, especially for the elevated highway and urban light rail, subway noise prevention use, is a modern urban best acoustic noise reduction facilities. 1m a sound barrier height between 5m to cover the effective area of ??the average noise 10 ~ 15dB (A) (125Hz ~ 40000Hz, 1/3-octave), up to 20dB (A). In general, the higher the sound barrier, or farther away from the sound barrier, the noise reduction, the better. Series Description Folding edit this section constant sound barrier aluminum fiber cotton base Folding constant basis sound barrier aluminum fiber cotton Size: 30mm thick noise reduction coefficient NRC = 0.85 absorbing noise barrier Rockwool permanent basis Folding permanent basis Rockwool performance characteristics of the sound barrier, insulation Performance: Good insulation properties is a fundamental characteristic of rock wool products, under normal temperature (about 25 ℃) rock wool thermal conductivity is generally between 0.03 ~ 0.047W / (moK). 2, combustion performance: rock wool, slag wool products of combustion performance depends on how much of the flammable adhesive. Rockwool itself belongs to an inorganic mineral fibers, non-combustible, in the course of processing into products, and sometimes adding organic binders or additives, which may have some impact on the combustion properties of the products. 3, noise performance: rock wool products have excellent sound insulation and sound absorption properties, the absorption mechanism of this product has a porous structure, when the sound waves, due to the flow resistance of the role of friction, so that part of the sound energy fiber absorbed, overcast hinder the transfer of sound waves. Hang wool base sound barrier applications: wool from the 1970s are widely used in construction and industrial equipment, piping, furnace insulation, fire, acoustic, seismic, metallurgy, machinery, building materials, petroleum, chemical and other industries. Rockwool products are mainly technical performance indicators of high-strength cement-based cement acoustic folding lightweight composite sound absorbing noise barriers: lightweight, high strength cement absorbing acoustic panels adopt advanced technology and raw materials efficient sound absorption products, technical performance in the domestic advanced level. Structure types, beautiful appearance. To meet different design requirements, widely used in highways, railways, viaducts and industrial plant boundary noise control engineering. Technical indicators Technical indicators sound insulation sound insulation sound absorption coefficient absorption coefficient absorption of aluminum composite sound absorbing aluminum folding pinhole Features: light pollution, glare, anti-aging, shock, freeze-thaw stable absorption coefficient, resistant to moisture, corrosion-resistant, pliable and easy processing, easy to transport, disassembly easy maintenance, reasonable price, and painted in different colors. Pinhole aluminum complex sound technical parameters: 1, the noise reduction coefficient: 75MM when cavities NRC≥0.70; 2, sound insulation: ≥30dB (A); 3, artificially accelerated weathering (250h): no powder; 4, resistance to salt spray Corrosion: Acid 1000h, the appearance of rating 10, no pitting, blistering, peeling corrosion; 5, tensile load: ≥1305N; 6, Fire rating: A-level or slab is a sound-absorbing folding perlite pore, inorganic cement composition, it does not contain contaminants, is substantially cement, natural minerals together with other chemical materials via special post-treatment, with stirring, forming tooling, thus durable, and very high plasticity, be formulated different density, shape, color, appearance to adapt to different conditions of installation and design, to meet the different needs of practical application. Compared with other existing sound-absorbing insulation materials, perlite material has the following characteristics: perlite sound barrier with stable absorption properties, noise reduction coefficient NRC0.85 about good high-frequency section in noise absorption properties, in line with the road sound barriers acoustic requirements. Application and simple installation, can be prefabricated or field shaping. No organic ingredients, non-polluting ingredients: for example, asbestos, mineral fibers, polystyrene, cellulose non-absorbent, anti-wind and rain erosion, easy to clean, can be exposed to the use in the open air, durable and strong resistance to natural aging. Low density, high temperature, low temperature, acid, alkali erosion and fire. Acoustic absorption frequency bandwidth, noise reduction coefficient around NRC0.85, sound insulation capacity of 46dB. Pastel, color multiple choice, beautiful, European style. Folding microperfrated plate absorption principle is on board a number of drill holes, the rear plate to leave some air layer incident resonance absorption of sound waves, so as to achieve sound absorption effect. Micro-perforated plate sound barrier has been widely used in highways, urban elevated other places. Micro-perforated plate material from the earliest PC board, acrylic board, the development of color steel, aluminum and other metal materials. Advantages of micro-perforated plate are: high temperature, moisture resistance, impact resistance, high-speed air stream. With stable absorption properties, the average absorption coefficient greater than 0.60, noise reduction coefficient around NRC0.60, in line with the road noise barrier acoustic requirements. Folding cement composite wood sawdust absorption suction insulation board from wood chips, cement and chemical additives through a series of special process, have excellent absorption insulation performance, high strength, weather resistance, long life, can meet different design and use requirements, can be composed of a variety of structural forms, it is an ideal material for traffic noise, industrial noise, residential noise control zone. Cement wood composite acoustic panels wood composite cement absorption coefficient absorption coefficient of acoustic panels folding a PC board, the mechanical properties of the sound barrier for PC board 1, impact strength: PC solid sheet with excellent impact resistance than conventional glass high 250 times, 30 times higher than the acrylic sheet. The impact strength of polycarbonate panels Pc like saying "transparent plate," said. 2, good tensile strength, PC solid sheet heat resistance, even at 120 ℃, its tensile strength is still up 350kgf / cm2. 3, bending strength: PC solid sheet bending is good, even if the bending angle of 90 °, still broken. 4, anti-fatigue and creep resistance: PC solid sheet creep resistance is the best in the thermoplastic plastic. Even at high temperature creep is still small. Second, the thermal properties of the sound barrier for PC board 1, the melting temperature shape: PC Solid sheet-shaped melting temperature of 135 ℃, their continuous use temperature of 120 ℃. 2, linear expansion coefficient: linear expansion coefficient of 7 × 10-5cm / cm / ℃ in plastic in the case of smaller. 3, the brittle transition temperature: PC solid sheet brittle transition temperature of -40 ℃, the minimum continuous use temperature -30 ℃, is generally not comparable plastic. 4, Combustion: PC solid sheet is a flame retardant self-extinguishing plastic one, it does not produce toxic gases when heated to high temperatures. 5, thermal conductivity: PC solid sheet of thermal conductivity and general plastic insignificant, 1/4 glass, 1/300, 1/1000 of aluminum, copper, iron 1/2000, is a good thermal insulation properties of materials one. Third, the optical properties of the sound barrier for PC board 1, transmittance: PC solid sheet of light transmittance of the glass fairly between 85-90%. 2, weather resistance: general long-term exposure to outdoor PC endurance plate, by ultraviolet radiation can lead to yellowing and surface degradation. Gao Feng PC sheet surface with a layer of anti-UV layer, even if long-term exposure to outdoor, optical and mechanical properties did not change significantly. Fourth, the sound barrier for PC board chemical resistance of polycarbonate at room temperature, good resistance properties of weak acid and alcohol, but to resist the strong performance acid, benzene, chlorinated hydrocarbons and esters slightly poor, easy to produce dissolution, swelling or decomposition phenomenon. Because of its chemical resistance, and high and low temperature, the internal residual stress magnitude and the length of time of exposure, it should pay particular attention before use. Fifth, lightweight sound barrier dedicated PC board at the same thickness and area, PC solid sheet weight is only half of the glass, so you can save a lot of difficulty moving and construction of sound barriers. Sixth, the sound effects sound insulation sound barrier dedicated PC board PC sheet is higher than the glass 3-4DB, the preferred material for noise barriers transparent insulation materials, PC solid sheet has been widely used in highway sound barrier, sound barrier viaduct, Freeway sound barrier, sound barrier rail, rail barrier, high-speed rail barrier, residential noise barriers sound barrier project. Folding glass wool centrifugal glass wool (GALSS WOOL) is on the rise internationally eighties new insulation materials, glass fiber in the new family member, it uses advanced centrifugal blowing process, the glass in a molten state were fibrosis and spraying cotton-like material made of a thermosetting resin, and then after thermal curing deep processing can also be made with a series of multi-purpose products. It has a flame retardant, non-toxic, corrosion resistance, bulk density of small, low thermal conductivity, chemical stability, low moisture absorption rate, hydrophobic good, and many other advantages, is now recognized as the most superior performance of thermal insulation, sound-absorbing material, It has a very wide range of uses. Board with this material, felt, pipe insulation have been widely used in construction, chemical, electronics, electric power, metallurgy, energy, transportation and other areas, sound absorption, the effect is very significant. Because the material is soft, fine fiber, shot content and less, the construction will not irritate the skin, and therefore welcomed by the construction unit, has become the product of choice for thermal insulation. Glass wool products are quartz sand, feldspar, silica sodium, boric acid as the main raw material, high temperature melting cotton-like fiber made smaller than 6μm then by heat setting to create a variety of shapes and sizes of products. Features: 1, light weight, sound absorption coefficient, flame retardant and has excellent chemical stability. 2, moisture and radiation. Specifications Specifications Applications: 1, roof insulation, cold, sound-absorbing materials. 2, building insulation, cold. 3, entertainment theaters, television stations, radio stations, laboratories, acoustic treatment. 4, petroleum, chemical, thermal, industrial heating, heating and other civilian pipe insulation, cold. Aluminum foam is made after folding aluminum foam additives in pure aluminum or aluminum alloy, after the foaming process together, with both metal and bubble characteristics, is a new type of porous sound-absorbing material. Aluminum foam acoustic panels and aluminum fiberboard directly exposed to the atmosphere does not need armor perforated plate and a filler, etc., easy to install. Aluminum foam sound barrier with stable absorption properties, the average absorption coefficient greater than 0.64, noise reduction coefficient around NRC0.75, mainly for low-frequency sound absorption performance outstanding traffic noise, higher than some of the other common sound-absorbing material, and in After rain and dust suction, absorption coefficient does not change, in line with the road noise barrier acoustic requirements. Aluminum foam acoustic panels can spray a variety of colors, while sound absorption performance is not affected, can greatly enrich the sound barrier landscape. Aluminum foam as acoustic panels and glass can be washed, and can achieve self-cleaning through natural rain will not affect the acoustic performance; once fouling, without affecting acoustic performance, but will increase the high-frequency sound absorption performance. Aluminum foam with a metal corresponding fire resistance, weather resistance, corrosion resistance, aging resistance, the design life of 20 years. Foamed aluminum acoustic board has excellent anti-glare properties. Aluminum foam sound barrier has been widely used in China, the Lupu Bridge, Xupu Bridge, A5 highway, Spring Road Viaduct have been applied, the aluminum foam, and has passed inspection. Shanghai Urban Outer Ring Road Pudong section is also being applied to install. Aluminum fiber folding aluminum fiber acoustic board is made of aluminum mesh on both sides of the aluminum foil which mat and sandwiched between, the roll forming a metal type sound-absorbing material. It has excellent sound absorption properties, high tensile strength, ultra-thin lightweight, easy to transport and storage, good weather resistance, decorative, easy processing and construction and installation, recyclable and so on. ● ultra-thin light: aluminum fiber acoustic board thickness is generally about 0.8 ~ 2.0mm, surface density 1.4 ~ 3.2kg / m2. Due to the volume of material is extremely small, very convenient transport and storage. ● 1.35mm thick as 0.7,1.8mm noise reduction coefficient NRC noise reduction coefficient NRC thick as 0.9 ● Decorative: the board can be sprayed desired color, colorful appearance, set decoration effects and sound-absorbing effect in one. ● easy to process and construction of the installation: Plates good processability, easy drilling, bending and cutting. Construction and installation process does not produce fiber scattering dust pollution affecting the health of workers, the construction is simple. ● material sheet width large: Aluminium Fibreboard is through the use of the plastic roll forming, plate width large. In addition to the plates, it can be processed into a variety of shapes absorber. ● recyclable: made of aluminum metal, it does not form a discarded garbage exchange cause pollution to the environment, so it itself is an environmentally friendly product. Acoustic noise barrier collapsed edit this paragraph, the amount of noise in the frequency of the sound barrier, from the height and the sound source and the receiving point barrier between the other factors. A large component of the relationship between sound barrier noise reduction and noise frequency of greater than 2000Hz frequency acoustic noise reduction ratio of about 800 to 1000Hz intermediate frequency sound better, but around 25Hz low-frequency sound. Due to relatively long wavelength acoustic and easily diffracted from the barrier above the past, so the effect is poor. Typically, high frequency acoustic sound barrier reduces l0-15dB. Height sound barrier, according to the height doubling of distance from the sound source and the receiving point of the design, barrier, then the noise increase the amount of 6dB, in order to make better noise barrier should try to keep close to the sound barrier source or receiving point. Acoustic type folding Edit this paragraph infrasonic and ultrasonic sound waves that people fold 1. The mechanical waves can cause hearing called acoustic (audio). Frequency between 20 ~ 20000Hz. 2. infrasonic frequencies below 20Hz mechanical waves is called infrasound. The ultrasonic frequencies above 20000Hz mechanical ultrasonic. 1. shear wave longitudinal wave longitudinal wave medium folding along the propagation direction of movement of the particle wave. 2. transverse medium particle is perpendicular to the propagation direction of movement of the waves. 3. The surface wave propagation along the surface layer of the medium, the amplitude of the wave decrease rapidly with depth. Wave cylindrical wave plane wave 1. spherical wave front folding plane perpendicular to the direction of the county and wave propagation. 2. The cylindrical wave wavefront coaxial cylindrical wave. 3. The spherical wave wavefront concentric spherical waves. Selection principles folded edit sound barrier material selection in this paragraph is the general principle of good performance noise reduction, structural safety and reliability, materials, affordable, low installation cost, durable, long life, landscape coordination, nice and so on. Specifically described as follows: (1) large noise: not less than the average amount of noise 35dB; (2) high absorption coefficient: the average absorption coefficient of not less than 0.84; (3) weather durability: The product should have the water resistance, heat, UV, rain temperature changes will not reduce the performance or quality of the exceptions. Products using aluminum coil, galvanized coil, glass wool, H galvanized steel column surface outside the grounds of anti-corrosion life of more than 15 years. (4) appearance: choose a variety of colors and shapes are combined with the surrounding environment, the formation tapestry. (5) Economic: prefabricated construction, improve work efficiency, shorten construction time, saving construction costs and labor costs. (6) Convenience: parallel with other products to install, easy maintenance, easy to replace. (7) Portability: sound-absorbing board series of products with light weight characteristics, load bearing reduce elevated light rail, elevated road, can reduce the cost structure. (8) Fire: superfine wool, because of its high melting point, non-flammable, fully meet the requirements of environmental protection and fire code. (9) High intensity: the combination of different climatic conditions of the region, in the structure designed to fully test the virtual wind loads. Increase the strength of the production line by pressing the groove. (10) waterproof, dustproof: material design takes full account waterproof, dustproof, dust or rain in the environment the sound absorption performance is not affected, construct drainage measures have been set for dust, avoid stagnant water inside member. Micro-perforated cavity resonance absorption of sound absorption performance in the rain affected the environment, for the low-frequency noise is particularly evident. (11) Durable: product design has been fully taken into account the wind load of the road, crash safety transportation vehicles and full gas fake outdoor corrosion. Products using aluminum coil, galvanized coil, glass wool, H galvanized steel column surface. No corrosion within the warranty period, the same type, sound absorption, sound insulation effect is not reduced. Advantages prospects Edit this paragraph advantages fold fold 1, low cost: only low production costs, and because the product is light weight can significantly reduce the bearing load elevated light rail, elevated road, reducing construction costs; 2, to withstand strong wind load: high strength, weight Light can meet different climatic conditions on wind load requirements of each region; 3, excellent acoustic performance: average noise magnesite sound barrier is greater than 35dB, the average absorption coefficient greater than 0.84 in all areas to meet the requirements of the sound barrier; 4 , fire performance: Magnesite cementitious materials are inorganic non-combustible materials, sound-absorbing composite of glass wool, perlite and other materials also have good fire performance, making products with excellent fire performance, is a national A-level non-combustible material; 5, using durability: Magnesite sound barrier water-resistant, fire-resistant, corrosion-resistant, anti-UV, from rain, snow, wind and sand erosion and other inclement weather, long life; 6, easy installation: Magnesite sound barrier, light weight, can be Prefabricated construction, high efficiency, short construction period, can save a lot of labor costs; 7, beautiful plastic: according to the different needs of the metal material structure can be used, and the transparent material combinations can also be painted in different colors and patterns to achieve landscape decorative requirements. 8, energy saving: the magnesite sound barrier raw materials used non-toxic, and the production process without high temperature heating, no toxic gas release, the state encourages the development of environmentally friendly products; 9, broad scope of application: according to the different needs of machine production Link Magnesium and magnesium acoustic panel sound-absorbing panels for road transportation, rail, railways, culverts, tunnels and industrial plants, workshops and residential quarters and other fields. With China's rapid economic outlook fold growth, accelerating urbanization process, highways, railways, urban rail transit and other modes of transportation to get rapid development in the construction of these roads is inevitable to pass through residential areas the population is concentrated, the resulting Work road traffic noise to nearby residents, living, learning has brought some interference. National environmental monitoring results show: road traffic noise, about 17 percent of the city is moderate pollution, 49% of urban light pollution, establish sound barrier solve the traffic noise pollution has become the main form of urban road noise control. Magnesite sound barrier because of its unique advantages in the rapid development, has been widely used in Beijing, Zhengzhou, Guangzhou and Chongqing and other cities. Application Description Folding edit this section is mainly used for sound barriers along the railway and highway sound barrier mainly for highways, elevated roads composite, S-Bahn subway and other transportation facilities in the municipal acoustic noise reduction, control of traffic noise on nearby urban areas effect, can also be used acoustic noise reduction plants and other noise sources. Divided into pure sound barrier sound barrier reflective insulation, sound insulation and sound absorption combined with the compound sound barrier, which is more effective insulation made out of. Most of the sound barrier have chosen hybrid absorption and insulation products, the products are characterized by the generation and transfer characteristics of the targeted road noise control. Such as car and road friction sound or locomotive and rail grinding sound in the lower road, the sound has the upper body of the screen by diffraction characteristics, so the use of the upper and lower absorption in the design, intermediate insulation structure, which can effectively weaken the noise around radio; intermediate transparent sound barrier reflective insulation panels, effectively interrupt transmission of sound waves; but also to provide a broad perspective environment for drivers and residents. Building acoustics, through acoustic treatment, control reverberation time and indoor sound environment to meet the requirements of professional venues knowledge using folding Edit this paragraph 1, the diffraction sound barrier over the top to reach the sound by sound diffraction points can be compared directly without barriers sound energy is small. The difference between the direct sound and the sound level of the acoustic diffraction, called diffraction attenuation, the value represented by the symbol △ Ld, and with the Φ angle increases. Sound barrier diffraction attenuation is the sound source, the sound of the three points and sound barrier function of the geometry and frequency by, it was decided to sound panel 2, acoustic transmission source emitted through the sound barrier to the spread of the phenomenon that is the sound of points . Acoustic energy through the sound barrier depends on the surface density of the sound barrier, the angle of incidence and frequency of sound waves. The ability to evaluate the sound barrier insulation with sound transmission loss TL. TL large, transmission of sound energy small; TL small, the transmission of sound energy big, transmission of acoustic energy may reduce insertion loss sound barrier, reducing the amount of insertion loss due to transmission is called transmission sound correction. ΔLt represented by the symbol. Usually in the acoustic design, the requirements of TL - △ Ld≥10dB, transmission of acoustic energy at this time is negligible, that is △ Lt≈0. 3, reflecting on both sides of the road were built when the sound barrier, and the sound barrier parallel, the sound waves will be multiple reflections between the sound barrier, sound barrier over the top diffracted by the sound to the point, it will reduce the insertion loss of the sound barrier by reducing the amount of reflected sound waves is called insertion loss reflected sound correction amount represented by the symbol △ Lr. To reduce reflected sound, usually in the sound barrier by the road side additional sound absorbing structure. Depending on the size of the reflected acoustic energy absorption coefficient of the sound absorbing structure α, which is a function of frequency, the sound barrier for the evaluation of the overall absorption effect of the sound absorbing structure, commonly used noise reduction coefficient NRC. The main physical barrier insertion loss. Construction Requirements 1. folding editor built on the basis of the roadbed sound barrier in this paragraph should be synchronized with the construction of roadbed, shall not be damaged because of construction, the impact of roadbed stability and security. Foundation construction should sound barrier in the way of basic body shape, before laying the track and cable trench construction; embankment before construction of various types of pipelines should identify the location of; according to the basis of the size and location of the sound barrier on the hard shoulder of the cutting slot, cut open When the tank is prohibited in damage of various pipelines. 2. The basic design requirements should sound barrier position, shape, size, depth, construction, foundation excavation may destroy the foundation bed surface. 3. sound barrier foundation laying anchor, anchor grouting holes used in construction materials, construction methods should meet the design requirements, shall not affect the security and stability of the roadbed. The basic design requirements should sound barrier construction joints. The foundation of every sound barrier set up a 20m ~ 30m long expansion joints. Construction site topography should be combined to determine the specific location of the expansion joints. 5. The sound barrier design requirements should be embedded foundation drains, drain outlet can not scour the roadbed; and non-ballasted track line between basic concrete drainage sumps at the intersection must not undermine the drain. Base to the top of each 2m embedded & oslash; 100mmL shaped PVC pipe to the drainage sound barrier inside of the shoulder surface; Central Area Tapered at each 4m 2% slope embedded & oslash; 75mm straight PVC pipe to discharge path primitive seepage and cable trough discharge; roadbed between Ballastless Track on line connecting the sump can be poured into the foundation drain. Roadbed sound barrier drainage facilities should be located, outside of the drain outlet should avoid generating embankment slope erosion and prevent sound leakage. 6. After all the sound barrier foundation compacting concrete injury, the surface should be smooth interface with the roadbed surface. 7. Sound Barrier basis of concrete strength test shall comply with the provisions of Standard 11.2.18. 8. basis and cable channel sound barrier between the catenary pillar, etc. with the shoulder surface of the gap design requirements should be applied waterproof layer. Basis and cable ducts, catenary between the columns, and the shoulder surface of the slit etc. Asphalt waterproofing layer application. 9. sound barrier line basis from the centerline, cross-sectional dimensions, tolerances embedment depth, number of tests and test methods should be consistent with the provisions of Table 13.4.9.