61results about How to "With sound absorption and noise reduction" patented technology

The invention discloses a method and device for preparing ceramsite from sludge pyrolytic biochar. The method includes the steps that powder grinding, humidifying, pelleting, low-temperature drying, middle-temperature presintering, high-temperature sintering and cooling are carried out on the sludge pyrolytic biochar to obtain the ceramsite. The device comprises a quantitative feeding device, a water adding device, a humidifying device, a forming and pelleting device, a drying device, a middle-temperature presintering device, a high-temperature sintering device and a cooling device. The sludge pyrolytic biochar is used for preparing the ceramsite, large-scale utilization of the sludge pyrolytic biochar is achieved, heavy metal element in the sludge pyrolytic biochar is further efficiently solidified and passivated, potential heavy metal accumulated pollution of the sludge pyrolytic biochar in the land using process is avoided, and the method and device are particularly suitable for resource utilization of sludge pyrolytic biochar with heavy metal content exceeding standard. The method is simple, practical, low in equipment investment and low in cost and has good economic benefits and environmental benefits.

The invention relates to fireproof paint, in particular to tunnel fireproof paint, which is prepared from the following ingredients: a major bonding agent (ordinary Portland cement), inorganic heat insulation filling materials (expanded perlite, expanded vermiculite, meerschaum, kaoline and wollastonite powder) and addition agents (calcium formate, starch ether, redispersible latex powder, methyl cellulose ether and polypropylene fiber). Through the unique addition agent combination and the prescription mixture ratio, the tunnel fireproof paint has the advantages that the construction performance is obviously improved, at the same time, the integral overall performance of the tunnel fireproof paint is greatly improved, and the tunnel fireproof paint has the characteristics of stable fireproof performance, high adhesion intensity and stable physicochemical performance. Simultaneously, the product per se generates no toxic substance in the construction and burning processes, has the effects of environment protection and high practicability, and can be widely used for the fireproof protection of buildings such as highways, railways, subway tunnels and the like.

The invention discloses a method for manufacturing water-permeable bricks with gradient holes from ceramic solid waste materials. The method includes steps that the ceramic solid waste materials are used as main raw materials for the water-permeable bricks, ball-milling variables are controlled, then grading is carried out according to the weights of screen residues and the particle size distribution of powder after ball-milling is carried out, a few adhesion agent and sintering aid mixed materials are added into different grades of raw materials at different particle size grades, the variousgrades of raw materials with the maximum mesh numbers are discharged into molds at first, then the materials at the secondary mesh number grades are discharged, and so on, pressures are ultimately applied to prepare green bricks by means of one-step forming, and the green bricks are fired by means of drying and firing at the temperatures of 900-1300 Celsius degrees for the firing time of 1-10 hours to form the water-permeable bricks with gradient hole structures. The method has the advantages that equipment is simple, the porosity and gradient structures can be controlled, the water-permeablebricks can simultaneously have water seepage and water filtration functions, the method is high in industrial waste material treatment capacity and has a high economic benefit, and the like.

The invention discloses an artificial stone for raised pieces. The artificial stone comprises the followingcomponents: 80-120 parts of unsaturated polyester resin, 120-400 parts of calcium carbonate or aluminium hydroxide, 10-30 parts of perlite, 0-3 parts of active carbon, 0-3 parts of radiation protection lead powder, 1-5 parts of polyester fibre or glass fibre, 1-3 parts of accelerator, and 0.5-2 parts of a curing agent. The invention discloses a preparation method of the artificial stone for the raised pieces, and the preparation method comprises the following steps: mixing the materials proportionally and blending uniformly; heating the mixture to be 30-50 DEG C; adding the heated mixture into a mould with skeletons; vibrating; vacuuming; curing; and demoulding. Compared with the raised pieces made of other natural stone materials or other artificial stones, the raised pieces made of the artificial stone provided by the invention are lighter, and have higher hardness (Barcol hardness more than or equal to 55), better toughness (impact toughness more than or equal to 3.5kJ / sq.m<2>), stronger shock resistance (flexural strength more than or equal to 40MPa). Compared with other raised pieces, the raised pieces made of the artificial stone provided by the invention have the characteristics of firmness, durability, twist resistance, and unlikeness to deform, crack and break.

The invention relates to a haydite asphalt pavement material and a method for paving road surface by using the haydite asphalt pavement material, in particular to an asphalt pavement material and a method for paving the road surface. The invention solves the problems that the majority of the prior roads are non-permeability road surface without pollution-controlled function; at the same time, runoff production quantity of the road is high, and degradation of organic pollutants is weak, which leads to serious pollution by directly discharging the pollutants into water; supplement effect to groundwater is weak and water fog is easily generated to cause traffic accidents. The pavement material in the invention consists of asphalt, light haydite and ore aggregate. The method for paving the haydite asphalt road surface comprises the following procedures that I. the asphalt, the light haydite and the ore aggregate are weighed; II. mixture of the haydite and asphalt is prepared through mixing; and III. the obtained substance is then stirred, mixed, paved and rolled to obtain the haydite asphalt road surface. The road surface paved by the haydite asphalt pavement material of the invention can prevent water fog from generating on an expressway, and thus reducing hidden troubles of the traffic accidents; the invention also effectively supplements groundwater to solve the problem of water resource shortage of our country, and has decontamination function.

The invention discloses energy-saving paint and a preparation method thereof. The energy-saving paint comprises the following components of cellulose, 2-amino-2-methyl-1-propanol-95 (AMP-95), a temperature-regulating, phase-changing, energy-storing and heat-preserving material, pure acrylic emulsion, a dispersing agent, a wetting agent, a defoaming agent, rutile titanium dioxide, glycol, a film forming aid, a preservative, a mildew prevention agent, a flattening agent, a thickening agent and deionized water. According to the energy-saving paint, the novel temperature-regulating, phase-changing, energy-storing and heat-preserving material is adopted, so that effects of saving energy by using latent heat, storing and releasing heat energy and making the room temperature be relatively balanced are achieved; and the energy-saving paint has sound absorbing, noise lowering, sterilizing, toxicity preventing, odor removing and fire and mildew preventing functions, and alkali can be prevented from being separated out.

The invention discloses a high-speed rail sound barrier device. The high-speed rail sound barrier device comprises a sound absorption mechanism and a frame. The sound absorption mechanism comprises a first arc-shaped device, a second arc-shaped device and a transparent device arranged between the first arc-shaped device and the second arc-shaped device. Sound absorption layers are arranged in the first arc-shaped device and the second arc-shaped device. The transparent device comprises two opposite glass plates, and a cavity is formed between the two glass plates and set in a vacuum state. The sound absorption mechanism is detachably arranged in the frame so that a sound barrier device body can be formed. The invention further discloses an installation assembly of the high-speed rail sound barrier device. Segmental design is adopted in the high-speed rail sound barrier device, storage, transportation, installation and later maintenance are facilitated, and the sound absorption effect is greatly improved compared with that in the traditional art. By the adoption of the installation assembly of the high-speed rail sound barrier device, installation stability is improved, and the high-speed rail sound barrier device is longer in service life.

The invention provides a sound-insulating fireproof door comprising a fireproof door core plate and sound-insulating fireproof coating which is coated on the surface of the fireproof door core plate.The sound-insulating fireproof coating comprises the following components and parts by mass: 32-37 parts of mineral wool, 16-24 parts of silica powder, 15-32 parts of acrylic resin, 10-20 parts of carbonized fiber, 8-17 parts of polyurethane emulsion, 18-22 parts of reinforcing fiber, 12-16 parts of expanded perlite, 3-7 parts of silane coupling agent and 8-14 parts of curing agent. The mineral wool is added in the sound-insulating fireproof coating to achieve the effect of heat preservation and insulation, damping and sound insulation and sound absorption and noise reduction; the coating is enabled to have good insulation property, good dielectric property, high heat resistance and weathering resistance by adding the silica powder; the coating is enabled to have good heat insulation and sound absorption effect by adding the polyurethane emulsion; and the sound-insulating fireproof coating is coated on the surface of the fireproof door core plate so as to improve the fire resistance ofthe door and have good sound insulation effect.

The invention discloses a plasticizer-free micro-foaming PVC (polyvinyl chloride) floor which sequentially comprises a PVC hard transparent sheet bottom layer, a rigid micro-foaming SPC (styrene-butadiene-styrene) base material, a PVC printing layer and a PVC hard transparent sheet surface layer from bottom to top, wherein the PVC hard transparent sheet bottom layer and the PVC hard transparent sheet surface layer do not contain plasticizers. The invention further discloses a preparation method of the micro-foaming PVC floor without the plasticizer. In the use process of the PVC plastic floor, people do not need to worry about harm to the human body and the environment due to migration, diffusion and precipitation of a plasticizer; besides, according to the rigid micro-foaming SPC base material prepared by the invention, the rigidity of the product is ensured, the use size stability of the product is ensured, and meanwhile, the foam holes or the expandable microspheres uniformly distributed in the base material have the effects of shock absorption, buffering, sound absorption, noise reduction and the like.

A high-crystal, light and high-strength gauge stuff ceiling is prepared through the following steps that firstly, a stirring solution is prepared, namely, a polyving akohol solution, the copolymer emulsion of polyvinyl acetate and ethylene, a water reducer, a water-proofing agent, a retarder and a defoaming agent are mixed with water and stirred evenly; secondly, mixed powder is prepared, namely gypsum powder and white cement are evenly mixed; thirdly, gypsum pulp is prepared, namely the mixed powder is poured in a barrel containing the stirring solution, short-cut glass fiber filaments are added during stirring, and even stirring is performed; fourthly, pouring molding is carried out, namely the gypsum pulp is poured in a PVC mold for bottoming, leveling and bottom shielding, and glass fiber gridding cloth and glass fiber bars are placed, wherein the glass fiber bars are placed close to the edge of an inner cavity of the PVC mold, residual pulp is poured in the PVC mold and ironed through a mud plate, a PVC cover plate is placed during knocking, and the periphery is compacted; and after the residual pulp is finally set, the high-crystal, light and high-strength gauge stuff ceiling is obtained through maintaining, drying and surface processing. The high-crystal, light and high-strength gauge stuff ceiling has the beneficial effects of being light in weight, low in transporting and installing cost, high in safety coefficient and the like.

A method for making diatomite bricks belongs to the technical field of inorganic non-metallic materials. The invention consists of materials: natural diatomite, kaolin, attapulgite, sepiolite powder, vermiculite powder, bentonite, water, bamboo powder, alginate, silicon carbide, and carboxymethyl cellulose. Diatomite bricks are prepared through the production process of configuring materials, pouring molds into billets, and microwave drying and sintering. The microwave drying and sintering method adopted in the present invention has fast heating speed, improved production efficiency, uniform heating, shortened production cycle, high efficiency, energy saving and no pollution. The diatomite brick produced by the invention is environmentally friendly and non-toxic, and has the functions of eliminating formaldehyde, purifying air, adjusting humidity, releasing negative oxygen ions, preventing fire and flame, sterilizing, deodorizing, absorbing moisture and deodorizing, absorbing sound and reducing noise.

The invention relates to a novel acoustic composite board production line and a production method thereof and belongs to the technical field of automatic control. The novel acoustic composite board production line comprises a first production line, a second production line, a connection section arranged between the first production line and the second production line, and a shared rock wool slitting system, which are arrayed in parallel, wherein each of the first production line and the second production line comprises an unwinding machine, a steel plate machining system, a longitudinal conveying roller bed, a rubber coating machine and a rubber roller pressure-bearing machine and the like, which are arranged in sequence from top to bottom. Compared with an existing composite board production line, the labor intensity of workers of the production line is lower, manpower demand is less, the loss of materials is less, the production efficiency is greatly improved and the cost is also greatly reduced. A novel acoustic composite board produced by the production line has various functions including a sound absorption and noise reduction function, a flame-retarding and fireproof function, a heat-preservation and heat-insulation function and the like; the production line has strong market competitiveness and is suitable for being popularized in big, small and medium-sized acoustic composite board manufacturers.

The invention relates to the field of architectural decoration materials and particularly relates to a diatom ooze composition having a cement board simulation style and a construction method thereof. The diatom ooze composition having a cement board simulation style comprises 20 to 50 parts of dry diatomite powder, 8 to 30 parts of zeolite, 5 to 12 parts of washed clay, 3 to 15 parts of quartz sand, 3 to 15 parts of silica micro-powder, 0.5 to 2 parts of nanometer zinc oxide, 0.8 to 2 parts of white carbon black-supported nanometer titanium dioxide, 1 to 15 parts of an inorganic iron oxide pigment, 2 to 5 parts of a water retaining agent, 1 to 3 parts of an organic gel material and 10 to 35 parts of an inorganic gel material. The inorganic iron oxide pigment is composed of iron oxide brown, iron oxide green and iron oxide black. The construction method of the diatom ooze composition having a cement board simulation style comprises base layer treatment, slurry preparation, main slurry scraping, and point material slurry point spreading. The diatomaceous mud composition has the advantages that the finished product is beautiful, is close to the cement board style and meets the requirements on diatom ooze wall material decorative properties in the special field. In addition, the diatom ooze does not contain any substances harmful to the human body, does not release the harmful gas such as formaldehyde, toluene and ammonia, has the functions of adsorbing and degrading harmful gas such as formaldehyde, and also has the functions of regulating air humidity, absorbing sound, reducing noise, preventing fire and resisting flame.

The invention provides a sound absorbing and noise reduction decorative board and a preparation method and application thereof. The decorative board comprises a non-woven needled glass fiber reinforced polypropylene layer and a thermoplastic film layer. The microporous structure of the non-woven needled glass fiber reinforced polypropylene layer has the advantages of sound absorption and noise reduction, and is combined with resonance sound absorption of a film layer, and the decorative board has the advantages of sound absorption and noise reduction.

The invention relates to a foaming cement and foaming polyurethane interpenetrating network thermal insulation board for an external wall and preparation of the foaming cement and foaming polyurethane interpenetrating network thermal insulation board, aiming at overcoming the defects that a foaming cement board has low intensity and is easy to crack, and a foaming polyurethane board is low in cost and poor in fireproof performance and the like. The external wall is characterized by being prepared from foaming cement (a component A) and polyurethane (a component B) through an inserting hole grouting process. In a preparation process, the component A is machined into the foaming cement board and the component B is filled through an inserting hole by pressurizing; after the polyurethane is foamed, the foaming cement and foaming polyurethane interpenetrating network structure can be formed. The foaming cement and foaming polyurethane interpenetrating network thermal insulation board provided by the invention has the advantages that the researched thermal insulation board for the external wall of a building has light weight and the surface-dry density is 100kg / m<3> to 300kg / m<3>; the coefficient of thermal conductivity is 0.03W / (m.K) to 0.05W / (m.K) and the thermal insulation and heat preservation performance is better; the compression strength is 0.2MPa to 3.0MPa; furthermore, the foaming cement and foaming polyurethane interpenetrating network thermal insulation board has the characteristics of sound absorption and noise reduction, fire resistance and flame resistance, low comprehensive cost and the like, and can be widely applied to heat preservation, energy saving and consumption reduction of the external wall of the building.

The invention discloses a bamboo-wood fiber flame-retardant composite decorative plate and a preparation method thereof. The composite decorative plate comprises a middle foaming flame-retardant plate and bamboo-wood fiber flame-retardant plates arranged on the upper surface and the lower surface of the middle foaming flame-retardant plate. The middle foaming flame-retardant plate comprises by weight: 50-70% of PVC resin, 10-15% of a foaming agent, 3-8% of a foaming regulator, 2-4% of a stabilizer, 5-10% of filler and 3-5% of flame retardant. The bamboo-wood fiber flame-retardant plate comprises by weight: 15%-30% of PVC resin, 20%-40% of bamboo-wood fiber powder, 30%-45% of calcium powder, 5%-10% of flame retardant and 1%-3% of mineral pigment. The middle foaming flame-retardant plate has the functions of sound absorption, noise reduction, heat preservation and heat insulation, meanwhile, the rigidity of the decorative plate is reduced, and therefore the situation that the plate is warped and deformed due to the fact that expansion force difference is generated after moisture absorption is avoided. The bamboo-wood fiber flame-retardant plate has the advantages that the raw materials are green and environment-friendly, the flame-retardant function is realized, meanwhile, the product is light and thin, the transfer from low-value products to high-value products is realized, and the maintenance cost is extremely low.

The invention relates to a sludge and shale thermal insulation microporous brick and a preparation method thereof. The sludge and shale thermal insulation microporous brick is prepared from the following raw materials in percentage by mass: 70%-75% of shale, 15%-20% of sludge and 5%-15% of coal gangue, and carboxymethyl cellulose sodium, the mass of which is 0.5% of the total mass of the mixture,is added. The preparation method comprises the steps of raw material crushing, mixing in ratio, raw material grinding, secondary sieving, particle size ratio-based mixing, test molding moisture content, water mixing, aging curing, multi-stage drying, raw material thermal property testing, setting roasting stage, and green body roasting. With the shale, sludge, coal gangue and admixture, the resource utilization of sludge and coal gangue in the sintered brick is realized, the sludge and coal gangue are recycled to reduce the environmental load, and are used together as a pore-forming agent forthe sintered brick to enable the sintered brick to have the characteristics of light weight, heat insulation, sound absorption and noise reduction.

The invention relates to the technical field of heat preservation plates, and particularly relates to a stone-like paint heat preservation plate. The stone-like paint heat preservation plate comprisesa heat preservation layer, a bonding layer, a panel layer and a facing layer which are sequentially stacked, wherein a plurality of grooves are formed in the surface, making contact with the bondinglayer, of the heat preservation layer; the panel layer is made of a calcium silicate plate; the upper surface and the lower surface of the panel layer are rough surfaces; the facing layer comprises aprimer layer, a finish paint layer and a mask paint layer; the primer layer is polished once before the finish paint layer is sprayed, and the mask paint layer is polished once before the mask paint layer is sprayed; the rock wool heat preservation layer is adopted in the stone-like paint heat preservation plate and can bear the high temperature of 1000 DEG C or above, in a fire disaster, rock wool can effectively prevent fire spreading, and a fireproof barrier is formed; meanwhile, the stone-like paint heat preservation plate further has the beneficial effects of achieving heat preservation and heat insulation, absorbing sound, reducing noise, being hydrophobic, stable in size, not being damaged by worms or corroded and the like; and therefore, the rock wool heat preservation layer is adopted in the stone-like paint heat preservation plate, the heat preservation and fire resistance of the stone-like paint heat preservation plate are effectively improved, and the use safety of the stone-like paint heat preservation plate is obviously improved.

The invention relates to a rainstorm-resistant waterlogging-resistant recycled pervious concrete pavement design method which is characterized by comprising the following steps: S01, determining a permeability coefficient K of a concrete pavement when a set drainage standard is reached; S02, obtaining a relational expression I between the concrete porosity P and the permeable system K, and determining the porosity P corresponding to the permeable coefficient K in the step S01 according to the relational expression I; S03, obtaining a relational expression II between the concrete strength and the porosity P, and determining the concrete strength according to the relational expression II; S04, designing water permeable holes in the concrete pavement according to a relational expression III between the porosity P and the water permeable holes, wherein the water permeable hole design comprises hole diameter and hole distribution design of the water permeable holes; and S05, designing the mix proportion of the concrete according to the concrete strength determined in the step S03. According to the method, the porosity and the mix proportion of the pervious concrete can be designed according to the rainstorm grade and the flood drainage requirement needing to be met by the pavement.

The invention relates to the field of food heating and provides a meal heat insulation box. The insulation can comprises a box body and a box door, wherein the box body is internally provided with a heating cavity, a storage cavity and a control cavity; the heating cavity surrounds and is communicated with the storage cavity; the control cavity is located on the top of the box body; a hot air circulation device, a steam humidification device and a temperature compensation device are arranged in the heating cavity; the hot air circulation device comprises blast fans and a first electric heatingtube; the first blast fan supplies air horizontally; the second blast fan supplies the air vertically; the steam humidification device comprises a second electric heating tube, a water tank and a humidity sensor; the humidity sensor is arranged in the storage cavity; the temperature compensation device comprises a temperature sensor and a third electric heating tube that are arranged in the storage cavity; a shelf and dinner plates are arranged in the storage cavity; and a microcomputer controller, a first blast fan switch, a second blast fan switch, a first electric heating tube switch, a second electric heating tube switch, a touch display screen and an indication lamp are arranged in the control cavity.

The invention relates to the technical field of insulation boards, particularly relates to a preparation process of a real stone paint insulation board. The preparation process comprises the followingsteps: (1) coating the upper surface of an insulation layer with a first polymer mortar layer, coating the upper surface of the insulation layer with reinforced glass fiber mesh cloth, coating the upper surface of the insulation layer with a second polymer mortar layer, and finally coating the upper surface of the insulation layer with a panel layer; and (2) coating the panel layer with a first primer layer, after the first primer layer is dried, polishing, cleaning and drying the first primer layer, coating the panel layer with a second primer layer after 2-4h, after the second primer layeris dried, polishing, cleaning and drying the second primer layer, coating the panel layer with a finish paint layer after 3-6h, after the finish paint layer is dried, polishing, cleaning and drying the finish paint layer, and spraying the finish paint layer with finish paint after 3-6h to obtain the real stone paint insulation board. The primer and the finish paint are sprayed twice, polishing andcleaning operation is adopted in the two times of spraying, the interval time between the two times of spraying is controlled, the bonding strength between the primer and the finish paint is improved, the cracking probability is reduced, and the overall spraying quality of the real stone paint is improved.

The invention discloses a waterborne environment-friendly waterproof emulsion and a preparation method thereof. The waterborne environment-friendly waterproof emulsion is prepared from the following components by weight: 260-500 parts of an ethylene-vinyl acetate copolymer emulsion, 80-100 parts of lightweight inorganic sound-absorbing fibers, 20- 60 parts of a mildew inhibitor, 2-10 parts of a bactericide, 2-5 parts of an antifoaming agent, 1-3 parts of an emulsifier, 2-5 parts of a dispersing agent, 15-20 parts of a film forming aid and 150-250 parts of deionized water. According to the invention, since the lightweight inorganic sound-absorbing fiber, the mildew inhibitor and the bactericide are used, the characteristics of sound absorption, noise reduction, sound insulation, fire prevention, insect prevention and mildew resistance are obtained after film formation of the emulsion; the proportion of the inorganic fibers can be adjusted according to market demands in actual productionso as to produce products meeting different market demands; since the emulsion provided by the invention is free of volatilization of organic solvents in use, so the emulsion is safe to construct andgood in environmental protection performance; and a film formed by the emulsion has high tensile strength, strong resistance to aging and chemical corrosion and good mechanical properties.

The invention relates to an engineering material and a preparation method thereof, in particular to an engineering material made of wool. The engineering material is composed of wool. The engineering material is characterized in that: the wool is dipped by adhesive, dried, carded and solidified. The engineering material made by the invention is a novel environment-friendly engineering material with functions of good sound absorption and heat preservation. The engineering material can be used to replace glass cotton material.

The invention relates to the technical field of rock wool product belts, in particular to a heat-insulation and fire-resistant composite plate based on rock wool belts as core materials and a processing technology thereof. The heat-insulation and fire-resistant composite plate comprises a base layer wall plate, the outer wall of one side of the base layer wall plate is evenly coated with construction adhesive, a heat-insulation rock wool plate is fixedly bonded to the base layer wall plate through the construction adhesive, the outer layer of the side, far away from the base layer wall plate,of the heat-insulation rock wool plate is evenly sprayed with protective mortar through a spray gun, and the outer layer of the protective mortar is provided with glass fiber mesh cloth. The heat-insulation and fire-resistant composite plate has the beneficial effect that high-quality basalt is used as a main raw material, after later melting, an international advanced four-roll centrifugal cotton-making process is adopted, high-temperature melt of the basalt is thrown and drawn into discontinuous fibers being 4-7 microns, a certain number of binders, dust-proof oil and water-repellent agentsare added into rock cotton fibers, processes such as sedimentation, curing and cutting are carried out, a series of products with different densities are made according to different purposes, and thecharacteristics of heat insulation, heat preservation, sound absorption, noise reduction, good non-combustion fire-resistant and temperature-resistant performance, long service life and the like are achieved.

The invention discloses a fixing device for capacitor machining. The device comprises a mounting bottom plate, a limiting plate, a connecting plate, a first sliding groove, a second sliding groove, afirst fixing plate, a second fixing plate, a fixing inserting rod, a compression spring, a sliding rail and a cushion disc; the limiting plate is arranged at the left end of the top of the mounting bottom plate; the limiting plate is provided with the connecting plate; the first sliding groove and the second sliding groove are sequentially formed in the inner side of the sliding rail from top to bottom. The first fixing plate is arranged on the right side of the first sliding groove, the second fixing plate is arranged on the right side of the second sliding groove, the fixing inserting rod isarranged on the right portion of the first fixing plate, the compression spring is arranged in the mounting bottom plate, the sliding rail is arranged on the inner side of the connecting plate, and the cushion disc is arranged at the top of the mounting bottom plate. The fixing device has the advantages of being convenient to adjust and fix different types of capacitors, assisting in stable machining of the capacitors, absorbing sound and reducing noise, and is mainly used for machining and fixing the capacitors.

The invention relates to a gear and specifically provides a noise-reducing gear. The noise-reducing gear structurally comprises a gear main body, wherein sound-absorbing cotton fills the gear main body. Compared with the prior art, the noise-reducing gear has the characteristics of reasonable design, simple structure, low manufacturing cost, long service life and capability of absorbing sound and reducing noise.

The invention discloses a solid waste-based geopolymer mortar dry blend which is prepared from 10-30% of mountain ash cementing material, 10-20% of phosphorus slag powder, 30-60% of sand, 0-10% of vermiculite powder, 0-10% of diatomite, 0-5% of magnesium borate whisker, 0-5% of modified nano titanium oxide, polyvinyl alcohol accounting for 0.02-0.2% of the total amount of the raw materials, and the alkali activator accounting for 2-6% of the total amount of the raw materials. The solid waste-based geopolymer mortar dry blend developed by taking the phosphorus slag, the soda ash waste residue and other industrial byproducts as main raw materials can simultaneously exert the dual effects of geological polymerization and hydration, the added functional material improves the added value of the product, and the dry blend can replace the traditional cement mortar to be used for road, bridge and culvert and tunnel construction. The material has the advantages of high strength, high toughness, cracking resistance, sound absorption, noise reduction, air purification, energy conservation, emission reduction and the like, is wide in application range, and has good practical application value.