5243 results about "Acoustic insulation" patented technology

The invention discloses sound-insulation and heat-insulation building mortar and a preparation method thereof, and relates to the technical field of building materials, the sound-insulation and heat-insulation building mortar comprises, by weight, 42-48 parts of a cementing material, 15-25 parts of an auxiliary material, 17-22 parts of lightweight aggregate, 30-35 parts of a functional filler, and 1-2 parts of an additive; the cementing material is a mixture of sulphoaluminate cement and Portland cement; the auxiliary material is a mixture of fly ash and quartz sand, the lightweight aggregate is a mixture of 20-40-mesh hollow vitrified microbeads and 70-90-mesh hollow vitrified microbeads, and the mass ratio of the hollow vitrified microbeads to the hollow vitrified microbeads is 1: (2-3); the functional filler is a mixture of modified waste rubber particles and modified fibers; the additive is a mixture of a polycarboxylate superplasticizer and hydroxypropyl methyl cellulose ether. The mortar disclosed by the invention is good in thermal insulation performance and excellent in mechanical property, the method disclosed by the invention is simple to operate and low in cost, and the prepared mortar is excellent in performance.

The invention relates to the field of building materials, and discloses a multifunctional foamed ceramic sound insulation and heat preservation material for buildings. Comprising the following raw materials in parts by weight: 42 to 48 parts of pottery clay tailings, 14 to 16 parts of fly ash, 10.5 to 12 parts of crushed stone materials, 2.8 to 3.2 parts of a silicon carbide foaming agent, 0.7 to 0.8 part of a borax fluxing agent, 7 to 8 parts of paraffin / silicon dioxide phase change microcapsules, 0.5 to 1.0 part of graphene, 2.0 to 2.5 parts of nano iron powder, 0.05 to 0.5 part of nano silver, 1.0 to 1.5 parts of photocatalytic titanium dioxide and 0.3 to 0.4 part of a fluorosilane coupling agent. A stable matrix structure is constructed through the argil tailings, the fly ash and the crushed stone materials, the silicon carbide foaming agent and the borax fluxing agent reduce the heat conductivity coefficient, the sound insulation performance is improved, the material is endowed with the antibacterial ability through nano-silver and photocatalytic titanium dioxide, indoor sanitation is guaranteed, and a super-hydrophobic layer is constructed through the fluorosilane coupling agent.

The invention relates to a modified polyurethane elastomer and application of the modified polyurethane elastomer in preparation of bimodal cellular structure foam, and belongs to the technical field of foam forming. The invention provides a modified polyurethane elastomer. The modified polyurethane elastomer comprises the following components: a thermoplastic polyurethane elastomer, a polyisocyanate-based chain extender and an antioxidant component, in the modified polyurethane elastomer, the mass ratio of the thermoplastic polyurethane elastomer to the polyisocyanate chain extender to the antioxidant component is 1: (0.01-3): (0.05-1). According to the modified polyurethane elastomer, non-uniform chain extension modification is carried out on the thermoplastic polyurethane elastomer by introducing an insufficient amount of a polyisocyanate group chain extender, and the thermoplastic polyurethane elastomer foam obtained by foaming the modified polyurethane elastomer has a bimodal (big and small holes) foam structure; and the material has various excellent performances of light weight, heat insulation, sound insulation, buffering, high resilience and the like.

The invention relates to the technical field of composite materials, in particular to a heat and sound insulation PVB intermediate film and a preparation method thereof. The problem that a PVB intermediate film is insufficient in heat insulation and aging resistance is solved. The preparation method comprises the following steps: pre-plasticizing PVB resin, shearing and mixing the pre-plasticized PVB resin and silane coupling agent modified enhanced nano cellulose, sequentially adding additives such as a plasticizer, molybdenum trioxide loaded lanthanum hexaboride, a composite light stabilizer and modified cerium oxide, and carrying out tape casting and hot pressing treatment to obtain the PVB intermediate film. Wherein the modified lanthanum hexaboride enhances infrared ray shielding, the composite light stabilizer and the modified cerium oxide synergistically improve the aging resistance, all the components are subjected to substance cooperation and process cooperation, comprehensive improvement of heat insulation, sound insulation and aging resistance of the PVB intermediate film is achieved, and the PVB intermediate film is suitable for the field of high-strength building glass.

The artificial intelligent fireproof smoke exhaust window comprises a ventilation window body, a window sash is arranged on the right side of the ventilation window body, fireproof sound insulation glass is installed in the window sash, the bottom end of the window sash is hinged to the bottom end of the right side of the ventilation window body, and a driving assembly is arranged between the window sash and the ventilation window body; a smoke exhaust assembly used for exhausting smoke outwards is arranged between the upper end of the ventilation window and the window sash. The driving assembly and the smoke exhaust assembly are arranged between the ventilation window and the window sash, the smoke alarm, the temperature sensor and the equipment box are arranged on the right side of the ventilation window, the equipment box can receive signals transmitted by the smoke alarm and control the electric telescopic rod to be started, and the electric telescopic rod drives the window sash to be opened; and meanwhile, in the opening process of the window sash, a T-shaped groove, a T-shaped block and a guide block can drive a movable plate to be overturned and opened, so that a fan corresponds to an exhaust channel, the fan exhausts smoke, the smoke exhaust effect is improved, and safety accidents are avoided.

The invention relates to the technical field, in particular to an ultralight foamed ceramic hollow sphere prepared from iron lepidolite tailings and a preparation method and application of the ultralight foamed ceramic hollow sphere. The foamed ceramic hollow sphere is prepared from the following raw materials: iron lepidolite tailings, silicon carbide, bentonite, sodium carbonate and potassium carbonate; in percentage by mass, the content of the iron lepidolite tailings is 90 to 96.4 percent; the content of the silicon carbide is 0.1-1%; the iron lepidolite tailings are prepared from the following components in percentage by mass: 77 to 80 percent of SiO2, 10 to 13 percent of Al2O3, 1.3 to 1.6 percent of Fe2O3 and 0.1 to 0.17 percent of Li2O. The ultralight foamed ceramic hollow sphere is prepared by using the iron lepidolite tailings, the silicon carbide, the bentonite, the sodium carbonate and the potassium carbonate as raw materials, can meet various market requirements of heat preservation, heat insulation, sound insulation, noise reduction and the like, and brings remarkable economic benefits and social benefits.

The invention discloses a high-weatherability sound insulation wood plastic wallboard and a preparation method thereof, the high-weatherability sound insulation wood plastic wallboard comprises the following raw materials by weight: 30-40 parts of wood flour or plant fiber, 25-35 parts of a sound insulation functional filler, 35-45 parts of high density polyethylene, 2-2.5 parts of maleic anhydride grafted high density polyethylene, 1-1.5 parts of stearic acid, 3-4.5 parts of a weatherability auxiliary agent, and 1-1.5 parts of azodicarbonamide. The problems of cracking, deformation and the like caused by moisture absorption expansion are relieved by optimizing the proportion and compatibility of the wood flour and the plastic, and then the problems of weather resistance and sound insulation of the wallboard outdoors are solved by filling the porous sound absorption material.

The invention discloses a super-strong mute building drainage pipe and a preparation method thereof, and relates to the technical field of high polymer materials. Comprising the following raw materials in parts by mass: 100 parts of high-density polyethylene, 5-7 parts of a cold-resistant toughening agent, 8-12 parts of a synergist, 8-10 parts of a sound insulation filler and 0.3-0.5 part of an antioxidant. By introducing the synergist prepared from the components such as polyamine polyether methylene phosphonic acid, zinc nitrate hexahydrate, magnesium nitrate hexahydrate and the like, the sound insulation, flame retardance and smoke suppression capabilities of the drainage pipe can be effectively improved; by introducing the sound insulation filler prepared from the modified halloysite nanotubes, hydroxyl-terminated polydimethylsiloxane, aziridine cross-linking agent and the like, the sound insulation, flame retardance and smoke suppression capabilities of the drain pipe are further improved. Therefore, the drainage pipe prepared by the invention has a wider application prospect.

The invention discloses a PVC (polyvinyl chloride) board with heat insulation, sound insulation and heat preservation functions. The PVC board is prepared from the following raw materials in parts by weight: 100 parts of PVC resin powder, 10-23 parts of plasticizer, 2.5-6 parts of stabilizer, 1-3 parts of barite powder, 4-15 parts of maleic anhydride grafted polypropylene and 3.5-10 parts of composite filler. The PVC board provided by the invention not only has excellent heat insulation and sound insulation properties, but also has good anti-aging and antistatic properties, and is high in mechanical strength and good in flame retardant property. The composite filler provided by the invention can significantly improve the heat insulation performance, sound insulation performance, flame retardant performance and aging resistance of PVC, also can ensure the mechanical strength of PVC, and can endow the PVC with good antistatic performance; the PVC board is endowed with excellent ultraviolet aging resistance and thermo-oxidative aging resistance through the composite filler, so that the PVC board can be better applied to an outdoor environment; the antistatic performance is endowed, so that the application scene can be widened.

The invention provides a sound-insulation porous ceramic tile and a preparation method thereof, and belongs to the field of building materials. The sound-insulation porous ceramic tile is prepared from the following raw materials: 20 to 30 parts of kaolin, 18 to 22 parts of quartz sand, 12 to 18 parts of potassium feldspar, 3 to 7 parts of talcum powder, 3 to 7 parts of silicon carbide powder, 2 to 4 parts of ferrosilicon alloy powder, 0.5 to 1.5 parts of sodium bicarbonate, 3 to 5 parts of hollow glass beads, 1 to 3 parts of zirconium oxide microspheres, 1 to 3 parts of silicon dioxide aerogel particles, 3 to 5 parts of acrylate emulsion, 1 to 3 parts of butadiene styrene rubber emulsion, 0.5 to 1.5 parts of polyvinyl alcohol solution and 1 to 2 parts of polyurethane dispersion. The composite material comprises the following components in parts by weight: 30-60 parts of polypropylene, 0.3-0.7 part of a dispersing agent, 0.2-0.4 part of a defoaming agent, 0.8-1.6 parts of reinforced fibers and 9-13 parts of deionized water. The raw materials of the porous ceramic tile are reasonably designed, the sound insulation performance of the porous ceramic tile is improved, and full-band efficient sound insulation is achieved.

The invention discloses a sound barrier defect detection method and device, electronic equipment and a storage medium, and the method comprises the steps: collecting a sound barrier image through an unmanned aerial vehicle, marking a structure and defects of the sound barrier image, constructing a sound barrier detection data set, and designing a detection model comprising a multiple attention mechanism module, the model may be trained based on the detection data set. The sound barrier defect detection method based on the model comprises the following steps: inputting a target image of the sound barrier into the detection model to obtain an initial feature map; weighting the initial feature map based on the channel attention branch and the space attention branch to obtain a channel weighted feature map and a space weighted feature map, and splicing the channel weighted feature map and the space weighted feature map to obtain a target feature map; and determining a defect position of the soundproof barrier based on the target feature map. Therefore, the perceptivity of the model to the color and the structure of the defect is improved through two branches of the channel and the space contained in the multiple attention mechanism, so that the accuracy of defect detection is improved.

A method for forming an acoustic panel assembly for an aircraft propulsion system is provided that includes: forming a plurality of cell rows of an acoustic core by, for each cell row of the plurality of cell rows, cutting and folding a sheet to form each cell row with a plurality of cells, and each cell includes a first transverse panel, first and second longitudinal panels and an oblique panel, and the first and second longitudinal panels extend transversely from the first transverse panel; positioning the cell rows on an inner skin extending circumferentially about an axial centerline; attaching the longitudinal panels of a cell to the oblique panel of that cell, and attaching each cell row of the plurality of cell rows to at least one other cell row to form the acoustic core.

The invention discloses a preparation method of a vibration and noise reduction bimetal composite pipe, relates to the field of metal pipe processing, and aims to solve the problem of poor vibration and noise reduction performance of a traditional composite pipe. The preparation method comprises the steps that a composite pipe blank is provided and sequentially comprises a titanium alloy pipe and a stainless steel pipe from outside to inside, the titanium alloy pipe and the stainless steel pipe are fixed through a base, and an annular columnar filling cavity is defined by the titanium alloy pipe, the stainless steel pipe and the base; the filling cavity is filled with metal particle materials, the metal particle materials are compacted through a pressing block, and the open end of the filling cavity is sealed and welded through a cover plate; hot rolling is conducted on the composite pipe blank, and a first composite pipe blank sequentially comprising a titanium alloy layer, a porous metal layer and a stainless steel layer from outside to inside is obtained; and cutting off the pipe section of the base and the cover plate to obtain the composite pipe. And the porous metal layer formed by the metal particle material has good energy absorption performance and excellent sound insulation and heat insulation performance, so that the prepared bimetal composite pipe finally achieves the purposes of vibration and noise reduction.

The invention provides a movable sound insulation dustproof construction shed, a plurality of supporting mechanisms are sequentially arranged in a shed body in the X-axis direction, and each supporting mechanism comprises two telescopic rods oppositely arranged in the Y-axis direction, a supporting assembly erected on the two telescopic rods and a walking assembly connected to the lower end of each telescopic rod; each telescopic rod is provided with a first limiting assembly used for limiting a sound insulation plate installed on the telescopic rod, and the supporting assembly comprises a first arc-shaped supporting rod and a second arc-shaped supporting rod which are used for supporting the shed body located at the upper ends of the two telescopic rods and can be oppositely folded. The walking assembly is used for driving each telescopic rod to move or stop, so that the problems that an existing dustproof noise reduction shed lacks comprehensive shielding and sound insulation measures on a device to be shielded, and sound insulation felt cloth is inconvenient to disassemble and assemble, so that the dustproof noise reduction effect and stability of the dustproof noise reduction shed are poor are solved.

The present invention belongs to the field of waterborne coatings, and discloses a lightweight waterborne multi-functional coating for new energy vehicles. According to the parts-by-weight ratio, it includes 67 parts of acrylic emulsion, 18 parts of modified hydrophobic calcium silicate aerogel micropowder, 5.7 parts of water, 0.3 parts of modified cellulose, 0.7 parts of dispersant, 3 parts of polyether polyol, and 2.8 parts of blocked aliphatic isocyanate. It mainly solves problems such as noise reduction, shock absorption, and lightweight of automobiles, and solves the problem that traditional waterborne damping coatings have a relatively large density and are difficult to reduce weight. The present invention synthesizes modified hydrophobic calcium silicate aerogel, which maximally reduces the dry film density while ensuring strength, and prevents the decline of damping performance caused by water absorption; polyether polyol and blocked aliphatic isocyanate are used for activated micro-foaming in the medium and high temperature regions, which not only achieves the purpose of sound insulation and noise reduction, but also reduces the density and realizes the lightweight of the material.

The present invention relates to a noise barrier wall panel that is lighter and more structurally sound than existing concrete noise barrier wall panels. The panel has a metal frame that is reinforced via metal strapping in key areas to prevent sagging. The panel has a plurality of layers forming a laminate that can be fixedly attached to the frame. A finish coating layer may have a plurality of designs, logos, symbols, or textures which may mimic building materials or scenery.

The invention discloses an assembly type prefabricated concrete heat preservation and sound insulation floor slab, and relates to the technical field of prefabricated floor slabs. The assembly type prefabricated concrete heat preservation and sound insulation floor slab comprises a prefabricated bottom plate, a heat preservation layer plate is arranged on one surface of the prefabricated bottom plate, first heat preservation and sound insulation plates are arranged on the heat preservation layer plate and arranged in a state with a dead zone, and a non-dead zone of each first heat preservation and sound insulation plate is used for heat preservation and sound insulation; and the panel layer is poured on the side, close to the first heat preservation and sound insulation plate, of the prefabricated bottom plate, and the panel layer can fill the goaf. The face plate layers are in contact with the heat preservation layer plates after being poured, so that the contact area between the layer plates is increased, the contact strength between the layer plates is improved, a layer plate sandwich structure is formed, direct covering type installation of heat preservation plates in the traditional sense is improved through the structure, the connection strength between the structures is improved, and the heat preservation effect is improved. And meanwhile, the heat bridge effect is blocked by utilizing the low heat conductivity of the first heat-insulating and sound-insulating plate, so that the heat-insulating and sound-insulating effects are greatly improved.

The invention relates to the technical field of curtain walls, and discloses a heat-preservation, heat-insulation, sound-insulation and energy-saving glass curtain wall structure which comprises a frame body, an outer positioning frame, an inner positioning frame, a buffering stability maintaining mechanism, outer-layer glass, inner-layer glass and a heat-insulation air bag, and a mounting groove is formed in the inner wall of the frame body in the thickness direction; the outer positioning frame and the inner positioning frame are fixedly arranged in the mounting grooves respectively; the buffering and stability maintaining mechanism comprises a plurality of buffering and stability maintaining belts, each buffering and stability maintaining belt comprises a plurality of hinged sliding seats, a plurality of bearing heads and a plurality of supporting rods, any two hinged sliding seats can be close to or far away from each other, one bearing head is arranged between every two adjacent hinged sliding seats, and the two hinged sliding seats are hinged to the corresponding bearing heads through the supporting rods respectively; the outer-layer glass and the inner-layer glass are arranged in the mounting cavity; and the heat insulation air bag is clamped between the outer-layer glass and the inner-layer glass. The problems that in the installation process of a glass curtain wall, when multiple layers of glass are movably connected with a frame body, inclination is prone to occurring, and glass corners are collided and extruded to be broken when an air bag is inflated are solved.

The invention relates to the technical field of special equipment for energy-saving building material production, in particular to production equipment for an assembly type module heat preservation and sound insulation composite board, which comprises a belt conveyor, a plurality of square casting molds are uniformly distributed on the surface of a belt of the belt conveyor, and two gantry trusses are arranged on two sides of the belt conveyor. An automatic alkali-resisting glass fiber mesh placing device and an automatic XPS plate placing device are arranged at the bottoms of the two door-shaped plates respectively, an automatic alkali-resisting glass fiber mesh pressing device is arranged at the position, located between the two gantry type trusses, of the top of the belt conveyor, and shear type lifters are arranged on the positions, located in the two gantry type trusses, of the outer side of the belt conveyor. The problems that the production efficiency is low, the laying precision is poor, the product consistency and stability are insufficient, and multi-specification production requirements are difficult to meet when alkali-resisting glass fiber screen cloth and XPS plates are laid manually are solved.

The present invention discloses a sound-insulating PVB film, its preparation method, and application. A sound-insulating PVB film comprises: a first PVB resin layer comprising the following components in parts by mass: 100 parts PVB resin, 33-47 parts plasticizer, 0.2-1 part antioxidant, 0.1-1.2 parts UV absorber, and 0.05-1 part adhesion regulator; a TPU resin layer disposed on the surface of the first PVB resin layer, comprising the following components in parts by mass: 8-24 parts TPU resin, 0.01-0.2 parts antioxidant, and 0.02-0.15 parts UV absorber; and a second PVB resin layer disposed on the surface of the TPU resin layer, the components of the second PVB resin layer being the same as those of the first PVB resin layer. The sound-insulating PVB film of the present invention uses TPU material for the middle layer, eliminating the need to add plasticizer to the middle layer. This prevents the plasticizer from seeping out of the PVB film and suppresses the generation of bubbles in laminated glass. The film also has uniform thickness and good optical properties.

The utility model discloses a high-strength assembly type building wallboard, which relates to the technical field of building wallboards, and comprises wallboard main bodies, a splicing frame is arranged between the two wallboard main bodies, the left side and the right side of the splicing frame are respectively provided with an assembly sliding groove, and the left side and the right side of each wallboard main body are respectively and fixedly connected with an assembly sliding plate. According to the utility model, the assembling sliding plate slides downwards and is inserted along the assembling sliding groove, so that the two wallboard main bodies and the splicing frame are spliced together, then cement can be injected into the formed pouring cavity, then the cover plate covers the top of the splicing frame, and after the cement is dry and hard, the assembling is completed; cement pouring can be used for filling gaps at the connecting positions to form an integral structure, loads can be effectively dispersed, shearing force can be effectively resisted, the bonding strength of cement is high, firm connection between the two wallboard bodies and the splicing frame can be ensured, and therefore the strength and the sound insulation and heat preservation effect after the wallboard bodies are assembled are improved.

The invention provides a magnetic hot-melt flame-retardant damping material. The magnetic hot-melt flame-retardant damping material is prepared from the following raw materials in parts by weight: 5-15 parts of an ethylene-vinyl acetate copolymer; 2-6 parts by weight of butyl rubber; 1-4 parts by weight of a styrene thermoplastic elastomer; 8-15 parts by weight of a tackifier; 7.5-17 parts by weight of a filler; 10-20 parts by weight of a flame retardant; 44-56 parts by weight of magnetic powder; and 1-4 parts by weight of a softening agent. Compared with the prior art, the magnetic hot-melt flame-retardant damping material provided by the invention adopts specific components with specific contents to realize relatively good overall interaction, and the obtained magnetic hot-melt flame-retardant damping material has excellent flame retardance, good vibration absorption and noise reduction effects, good flexibility, high-temperature baking resistance, high-temperature adhesion and washing resistance; and the product has the advantages of good storage stability, long shelf life and light weight, and is suitable for sound insulation, noise reduction and flame retardance near an automobile body and a battery pack.

The present invention belongs to the technical field of the preparation of modified isocyanates, and particularly relates to a modified isocyanate, a preparation method thereof and an application; the modified isocyanate comprises: 70-94 parts of an organic isocyanate; 6-30 parts of polyether polyol i; the polyether polyol i is a polyether polyol randomly copolymerized with EO / PO monomers and capped with EO, or a polyether polyol block copolymerized with PO monomers and capped with EO, or a mixture of the two; the average molecular weight of the polyether polyol i is 2000-10000, the functionality is 2-4, the EO content is 5-29 wt%, the hydroxyl value is 20-80 mgKOH / g, and the primary hydroxyl group content is greater than or equal to 70%. The modified isocyanate of the present invention has good storage stability, and the slow-rebound polyurethane foam prepared therefrom has fine open cells, and has the advantages of high tolerance, good tear performance, and good sound absorption and sound insulation effects.

A wall building system includes panels for walls, floors, ceilings, roofs, eaves, and lofts that positively couple together via one or more couplers. The panels may include an insulating core. The one or more couplers incorporate features for receiving plumbing, vents, drains, electrical, coax, CAT5, HVAC, and any other utilities or technology. The panels are designed such that the utilities are concealed until an electrical outlet, drain or water is required, at which time the panel is cut to expose the one or more couplers, which are subsequently cut to reveal a hollow cavity within. The system is aesthetically pleasing and reduces construction time considerably. The system is also extremely energy efficient, fireproof, soundproof, insect proof, virus proof, resists hurricane force winds, is EMP proof, fallout proof, can support a heavy snow load, and is faster to build with and structurally stronger than other construction methods.

The embodiment of the invention provides a compressor sound insulation structure and a control method thereof. The compressor sound insulation structure comprises a sound insulation cover and a deformation device. The compressor is covered with the sound insulation cover. The sound insulation cover comprises an inner sound insulation layer and an outer sound insulation layer which are sequentially arranged from inside to outside, and a resonant cavity is formed between the inner sound insulation layer and the outer sound insulation layer; the inner sound insulation layer is provided with a plurality of through holes and is made of a shape memory material; the deformation device is arranged in the soundproof cover and used for receiving the operation frequency of the compressor and driving the inner soundproof layer to deform according to the operation frequency so that the hole diameter of the through hole can be changed. Through the arrangement of the resonant cavity, the intensity of low-frequency noise is gradually weakened under the resonance effect, and therefore effective absorption of the low-frequency noise is achieved; by arranging the deformation device and the inner sound insulation layer made of the shape memory material, intelligent adjustment of the hole diameter of the through hole is achieved, so that the sound absorption frequency of the inner sound insulation layer and the resonant cavity is dynamically adjusted, the noise reduction requirement for broadband noise is met, and the operation noise of the outdoor unit is reduced.

The invention belongs to the technical field of multi-ribbed composite wallboards, and discloses an assembly type anti-cracking light multi-ribbed composite wallboard which comprises a rib lattice, a frame lattice is formed on the rib lattice, and a first supporting rib plate, a second supporting rib plate, a third supporting rib plate and a fourth supporting rib plate form a strong supporting effect in the frame lattice. The longitudinal reinforcing ribs are arranged on the two surfaces of the first supporting rib plate and the third supporting rib plate, and the transverse reinforcing ribs are arranged on the two surfaces of the second supporting rib plate and the fourth supporting rib plate, so that the strength of the supporting rib plates can be effectively enhanced; a first silencing hole, a second silencing hole, a third silencing hole and a fourth silencing hole are formed in the first supporting rib plate, the second supporting rib plate, the third supporting rib plate and the fourth supporting rib plate correspondingly, and a strong silencing structure can be formed by matching with the first cavity structure, the second cavity structure and the third cavity structure so as to enhance the sound insulation effect of the dense rib composite wallboard.

The invention relates to the related technical field of building sound insulation materials, in particular to a building heat preservation and sound insulation wall which comprises a building wall body, a vertical main keel, a transverse auxiliary keel and a sound insulation board, the vertical main keel is fixed to the building wall body, and the transverse auxiliary keel is fixedly connected to the vertical main keel; a plurality of transverse auxiliary keels are arranged between the adjacent vertical main keels at equal intervals, the sound insulation plate is positioned and fixed on the transverse auxiliary keels, the sound insulation plate comprises a bottom plate layer, a sound insulation layer and a panel layer, the inner side face of the sound insulation layer is fixedly connected with the bottom plate layer, and the outer side face of the sound insulation layer is fixedly connected with the panel layer; the building heat preservation and sound insulation wall is formed by combining the building wall body, the vertical main keels, the transverse auxiliary keels and the sound insulation plate, the sound insulation plate is formed by combining the bottom plate layer, the sound insulation layer and the face plate layer, the sound insulation groove is formed in the sound insulation layer, and the sound absorption cotton is filled in the sound insulation groove, so that the overall strength of the sound insulation plate is guaranteed, and meanwhile the sound insulation effect is improved. And the overall sound insulation and heat preservation effects of the sound insulation plate can be fully ensured.

The utility model relates to the field of silencing, discloses a marine exhaust pipeline silencing device, and solves the problem that an existing marine exhaust pipeline silencing device is poor in filtering effect. By combining multi-stage noise reduction and filtration, noise generated when a diesel engine set exhausts is remarkably reduced, impurities in waste gas are effectively purified, the holes in the shape of a circular truncated cone and multiple layers of sound insulation are adopted, and by means of combined use of the sound absorption plate, the ceramsite plate, the cotton block and the felt plate, smooth circulation and efficient filtration of the waste gas are guaranteed; and noise transmission is greatly weakened, a quieter and healthier working environment is provided for sailors, meanwhile, the requirement for environmental protection is met, and the overall performance and comfort of the ship are improved.

The utility model discloses a board for building, which relates to the technical field of building, and comprises a board frame and board covers arranged at the top and the bottom of the board frame, a hard board core is clamped on the board frame, an acoustic board is arranged in the hard board core, a silencing groove is arranged on the acoustic board, silencing cotton is arranged in the silencing groove, and the board covers are arranged at the top and the bottom of the board frame. A positioning block is fixed in the board frame, a groove is formed in the board frame, an elastic component is fixed in the groove, a positioning groove clamped with the board frame is formed in the hard board core, a mounting groove is formed in the hard board core, the hard board core is clamped on the board frame, the positioning groove is clamped on the positioning block, and the elastic component is fixed in the mounting groove. The mounting groove is clamped in the elastic component, the hard board core provided with the sound absorption board and the sound attenuation cotton is fixed in the board frame through elastic force generated by the elastic component, then the board cover is clamped on the two sides of the board frame, the board frame and the board cover are closed to form the board, and the firmness, durability, sound insulation and noise reduction effects of the board are improved.

The utility model discloses a torsion detection device for an electromagnetic brake. The torsion detection device comprises a workbench, a mounting seat, a transmission push cylinder, a clamp holder, a mounting frame, a detector and a sound insulation device, the sound insulation device is arranged, and the transmission shaft is driven to rotate by starting the driver, so that the transmission shaft can drive the sound insulation cover to rotate towards the top of the mounting seat, and the top of the mounting seat is shielded and covered; the sound insulation device is arranged in the sound insulation cover, the sound insulation cover is matched with the sound insulation pad arranged in the sound insulation cover to block and eliminate noise generated during testing, so that the noise can be quickly dissipated, the harm of the noise is reduced, and abnormal sound and noise generated in the testing process are isolated by arranging the sound insulation device; therefore, the problems that in original equipment, due to the fact that an electromagnetic brake makes contact with a direct fixing assembly, when the electromagnetic brake outputs power, the electromagnetic brake easily shakes, the electromagnetic brake slightly collides with the fixing assembly, and abnormal sound is caused are solved.