147results about How to "With sound insulation effect" patented technology

The invention relates to the plastic pipe field, in particular to a two-layer co-extruding plastic drainage pipe used outdoors. The drainage pipe contains an inner layer and an anti-aging outer layer, wherein the inner layer comprises the following components in parts by weight: 90-110 parts of polyvinyl chloride resin, 3.5-4.8 parts of composite stabilizer, 3-8 parts of impact modifier, 0.2-0.5 part of stearic acid, 0.2-0.6 part of calcium stearate, 0.3-0.6 part of AC foaming agent, 4-8 parts of foaming regulator ZB530, 5-40 parts of calcium carbonate, 0.4-1.0 part of polyethylene (PE) wax and 0.3-0.8 part of lead stearate. The outer layer of the drainage pipe is the anti-aging layer, thus the aging resistant problem can be solved. The inner layer adopts the foaming technology, thus the overall weight of the drainage pipe can be reduced, the impact resistance of the pipe can be increased, the pipe has the effect of sound insulation and the cost of the drainage pipe can be reduced. In addition, the invention also discloses a preparation method of the two-layer co-extruding plastic drainage pipe.

The invention discloses a light-weight high-strength ceramic plate. The light-weight high-strength ceramic plate is a light-weight ceramic plate which is fired at a firing temperature of 1050-1120 DEG C and has a honeycomb-like sealed pore internal structure, the volume weight is 1.55-2.1g / cm<3>, the thickness is 18-30mm, the water absorptivity is 0.1-0.5%, and the rupture modulus is no less than 20MPa.The light-weight high-strength ceramic plate is mainly prepared from the following raw materials: 1-3 parts of silicon carbide, 15-50 parts of ceramic waste solid, 10-35 parts of sludge or sediment, 10-35 parts of bentonite, 0.1-2 parts of green body enhancer and 0.1-3 parts of dispergator. Correspondingly, the invention also provides a preparation method of the light-weight high-strength ceramic plate. The light-weight high-strength ceramic plate has the advantages of light weight, high strength, low water absorptivity and high stone simulation degree, and can be dimensionally enlarged and thickened. When being used as an outdoor high-altitude curtain wall, the light-weight high-strength ceramic plate is very safe and convenient to construct, and the hanging cost is saved.

The invention provides an environment-friendly PVC (Polyvinyl Chloride) foaming ceiling panel and a preparation method thereof. The environment-friendly PVC foaming ceiling panel comprises the following components in parts by weight: 90-110 parts of PVC resin, 5-10 parts of polylactic acid, 7-12 parts of polycaprolactone, 10-20 parts of polyester fiber, 50-70 parts of barium sulfate, 3-7 parts of plasticizer, 5-11 parts of stabilizer, 1.7-5 parts of titanium dioxide, 0.6-2 parts of PE (Poly Ethylene) wax, 2-5.5 of processing modifier, 1.4-3.2 parts of anti-impact modifier, 0.7-1.5 parts of composite foaming agent and 20-30 parts of sepiolite. The environment-friendly PVC foaming ceiling panel provided by the invention has the characteristics of environmental friendliness, good weather fastness, high fire resistance, strong scratch resistance, sound insulation, thermal insulation, dust prevention, noise absorption, insect prevention and light reflection and is very suitable for serving as an indoor ceiling.

The invention discloses a fireproof and smoke-proof plugging coating for buildings. The fireproof and smoke-proof plugging coating comprises film forming emulsion, flame retardant additive, padding and assistant. The film forming emulsion at least comprises acrylic emulsion and styrene-butadiene latex; the flame retardant additive is a combination selected from one or more of aluminium hydroxide, zinc borate or magnesium hydroxide; the acrylic emulsion is a combination selected from one or more of styrene acrylic emulsion, vinegar acrylic emulsion, pure acrylic emulsion and silicone acrylic emulsion; the solid content of the quality of the coating is 50% to 85%. According to the fireproof and smoke-proof plugging coating, the existing water-based paint formula is improved, the fireproof and smoke-proof plugging coating has the excellent performance on the environment-friendly and economical basises, and the increasingly various fireproof and smoke-proof plugging requirements in the field of buildings are met.

The invention discloses a transformer sound insulation shell material and a preparation method thereof, which belong to the field of materials and solve the problem of poor sound insulation effect of existing materials. The preparation method specifically comprises the following steps of adding bakelite, epoxy resin, glass fibers, chemigum, polyvinyl chloride resin, cenosphere, expanded vermiculite, calcium carbonate, diatomaceous earth, silicone oil and antioxygen into a container, stirring for 15 to 20 minutes at the rotating speed of 1600 to 1900 r / min, uniformly mixing, then adding dichloromethane, continuously stirring for 5 to 10 minutes, adding acetic acid at last, stirring for 5 to 10 minutes at the rotating speed of 2000 to 2200 r / min, pouring raw materials which are uniformly mixed into a mold, solidifying for 60 to 80 minutes at the temperature of 65 to 75 DEG C, cooling and demolding, so as to obtain the transformer sound insulation shell material. The preparation method has the advantages of simplicity, easiness in operation and low production cost and can be widely used for transformer shell and case materials.

The invention discloses a porous glass plate and structures adopting the porous glass plate, which adopt the technical scheme that: the porous glass plate is provided with pores, the pores are perforated in a thickness direction and are in regular or irregular distribution in a plane direction, the opening ratio is more than or equal to 0.5 percent and is less than or equal to 60 percent, and thepores are circular or in any shape; and the structures adopting the porous glass plate comprise building and structure windows adopting the porous glass plate, vehicle windows adopting the porous glass plate, enclosures adopting the porous glass plate, sound barriers adopting the porous glass plate, totally enclosed structures of traffic passages adopting the porous glass plate, and paravents adopting the porous glass plate. The porous glass plate has the advantages of having air permeability and being favorable for the ventilation, having the sound-absorbing effect of a perforated plate and amicroperforated plate and certain sound insulation effect, having the effects of keeping out the wind and reducing the wind pressure, and having the rainproof and antitheft effects. The porous glassplate is applicable to windows or glass curtain walls of buildings and structures, vehicle windows, enclosures, sound barriers, enclosed structures of traffic passages and paravents.

A closed type cable or the like protection and guide device that reduces noise generation due to the generation of sliding contact sound during operation prevents entry of fine chips and wear powders of metal into the cable or the like protection and guide device. Scattering of contact wear powders, which are generated by sliding contact between components of the cable or the like protection and guide device, into the operation space can be prevented and a maintenance of the device is reduced. A cable or the like is included in a flexible support to be protected and guided from a fixed end side mounting member toward a movable end side mounting member and the entire outer surface of the flexible support except for an inlet and an outlet of the cable or the like is covered with a heat resistant tubular cloth cover.

The invention relates to a vertical hinged lateral overturned door system, and provides a noiseless vertical hinged lateral turned door system. An overturn mechanism is arranged between a door leaf and a rotating shaft vertical plate of a door frame, so that the door leaf is overturned laterally in the process of horizontally pushing a door, and a door-opening sweeping space is reduced; meanwhile, a buffer component is arranged in the overturn mechanism, and friction during rotation is reduced; damping pulley mechanism is arranged between a lintel horizontal plate and the door leaf, and collision between the door leaf and the door frame is eliminated in the door opening and door closing travels; side edges of the door leaf is provided with sealing strips to further reduce the collision between the door leaf and the door frame and achieve a soundproof effect; the locking end of the door leaf is provided with a noiseless lock body, and noise in the locking and unlocking process is avoided. According to the scheme, the noise generated in the door using process is comprehensively eliminated, and home and office environments are silenced.

The invention discloses a shaft frame of an aluminum alloy sightseeing elevator. The shaft frame comprises vertical posts positioned at the rectangular corners and crosspieces connected between the corresponding vertical posts. The shaft frame is characterized in that every vertical post comprises a hollow main pipe, mounting wings are arranged in two mutually perpendicular directions by taking the hollow main pipe as a benchmark, every crosspiece are connected on one side of the corresponding mounting wing, a glass bezel is formed in every mounting wing on the outer side of the correspondingcrosspiece, a T-shaped slide groove is formed in the inner side of every mounting wing and is positioned in a cable holding space consisting of one side edge of the mounting wing and a vertical edge of the corresponding hollow main pipe, a cover plate is arranged on an opening of the cable holding space, the crosspieces are connected with the connecting plates arranged in the cable holding spaces,shaft cables are arranged in the cable holding spaces, and exterior decorating glass is assembled through the glass bezels. The shaft frame of the aluminum alloy sightseeing elevator has the advantages that mounting can be carried out inside and outside the shaft frame, all fixing parts and the cables are hidden in the holding spaces, and the exterior decorating glass is safe to assemble and elegant in appearance.

The invention discloses a fireproof sound-insulation building thermal-insulation composite board and a preparation method thereof. The fireproof sound-insulation building thermal-insulation composite board comprises the following raw materials in parts by weight: 19-25 parts of Portland cement, 15-25 parts of glass fiber, 16-20 parts of phenolic foam particle, 22-33 parts of polystyrene, 10-15 parts of coated vitrified microsphere, 11-23 parts of polyether glycol, 5-15 parts of bentonite, 9-18 parts of fly ash, 15-25 parts of sodium methane-silicate, 15-20 parts of magnesium chloride, 8-15 parts of redispersible latex powder, 3-8 parts of inorganic reinforcing fiber, 2-11 parts of butyl propionate and 5-14 parts of EPS (expandable polystyrene) particle. The glass fibers have very high toughness, so that the properties of the board are greatly enhanced in the use process, and the board has higher stability. Under the interactions of the Portland cement, glass fibers, phenolic foam particles, polystyrene, polyether glycol, fly ash, EPS particles and the like, the board has the properties of thermal insulation, water resistance and decoration. The composite thermal-insulation board has high heat stability, and is a composite thermal-insulation board with excellent properties.

The invention discloses a sound-absorption and waterproof attapulgite board and a preparation method, which belong to the technical field of attapulgite. The sound-absorption and waterproof attapulgite board comprises an abrasion-resistance and waterproof layer, a rubber buffer layer, a sound absorption layer, a board body and a waterproof protection layer in sequence from top to bottom, wherein the board body is prepared by taking attapulgite as a basic material; the sound absorption layer comprises an elastic layer and sound absorption fillers; a plurality of small holes are formed in the elastic layer and are filled with the sound absorption fillers; the sound absorption fillers are prepared by taking attapulgite as a basic material; the sound absorption layer is connected with the board body by adhesive; the sound absorption layer is connected with the rubber buffer layer by adhesive. The sound-absorption and waterproof attapulgite board has comparatively good sound-absorption, sound-insulation and waterproof effects and has the comparatively good characteristics of stable performance, high strength and good weather resistance; in addition, the preparation method has the characteristics of being simple and being convenient in operation and low in manufacturing cost, so that the current market requirement is met, and the application value is comparatively good.

The invention discloses a preparation method of automotive damping rubber. The method comprises the steps of raw material preparation, raw material processing, plastifying, mixing, vulcanization, molding, detection and the like. According to the preparation method of the automotive damping rubber, the rubber synthesized by natural rubber, butadiene styrene rubber and ethylene propylene terpolymer has abrasive resistance, heat resistance and ageing resistance, has good damping and buffering effects, generates extremely low noise, and has a certain sound insulation effect. Barium sulfate is added, the water resistance of the rubber is improved, water seepage quantity is reduced, and corrosion and ageing of a rubber product are prevented. The physical and mechanical properties of a sizing material are improved through silicon dioxide and the fatigue resistance is improved. Compared with the other inventions, the automotive damping rubber is not easy to age, long in service life, good in damping effect and water resistance, high in security performance and worthy of later promotion, and resources are saved.

The invention discloses a sound-insulation and noise-reduction protective cover and a mounting method. The sound-insulation and noise-reduction protective cover comprises a steel structure framework,and a front side noise-reduction mechanism, a rear side noise-reduction mechanism, a left side noise-reduction mechanism, a right side noise-reduction mechanism and a top noise-reduction mechanism arearranged on the steel structure framework. The front side noise-reduction mechanism, the rear side noise-reduction mechanism, the left side noise-reduction mechanism and the right side noise-reduction mechanism are formed by splicing of a plurality of vertical sound-insulation plates. At least one of the front side noise-reduction mechanism and the rear side noise-reduction mechanism is providedwith a fireproof sound-insulation door, and at least one of the left side noise-reduction mechanism and the right side noise-reduction mechanism is provided with a sound-attenuation blind window. Thetop noise-reduction mechanism comprises horizontal sound-insulation plates arranged at the two ends and an open-hanging-type sound-insulation plate arranged in the middle. Sound-absorption plates arearranged on the inner sides of the vertical sound-insulation plates, the horizontal sound-insulation plates and the open-hanging-type sound-insulation plate. The problem that noise pollution is causedby power equipment is solved.

The invention discloses a lightweight partition board and a making method thereof, and relates to the technical field of partition boards. The lightweight partition board comprises 55-65 parts of Portland cement, 45-50 parts of modified fiber particles, 42-43 parts of modified clay, 40-42 parts of paraffin-diatomite phase transition gel, 37-40 parts of latex, 35-37 parts of phosphate, 32-35 parts of hollow glass beads, 27-29 parts of a foaming agent, 23-25 parts of a plasticizer, 21-22 parts of a fire retardant and 65-68 parts of water. The lightweight partition board has the advantages of good comprehensive strength, good tensile strength, good cracking resistance, good suspending ability, good sound and heat insulation effect, low production cost and high economic promotion benefit.

The invention provides a heat and sound insulation wood plastic material, belonging to the technical field of decorative wood plastic material. The material is composed of 80-100 parts of wood fibre, 20-35 parts of polyurethane plastic, 1-3 parts of a foaming agent, 3-5 parts of a plasticizer, 1-3 parts of fire retardant, 1-2 parts of an anti-oxidant, 1-2 parts of a flexibilizer and 0.5-1 part of a dispersant. According to the invention, the raw materials are easily available and cheap; and the prepared sheet materials has excellent performances of fire resistance, water resistance, corrosion resistance, humidity resistance, insect resistance, fungi resistance, acid and alkali resistance, no toxicity and no pollution; has higher hardness, longer life and higher strength than plastics do; and uses urethane foam, thereby not only being good in the heat insulation effect, but also having the sound insulation effect. The material can be used for decorating metope and base plate, and being made into furniture at the same time, and is beautiful and durable.

The invention discloses a multi-layer honeycomb plate, and belongs to the technical field of materials. The multi-layer honeycomb plate is formed by overlapping a panel, honeycomb plates and partitioning plates. The corresponding partitioning plate is arranged between every two adjacent layers of the honeycomb plates, the honeycomb plates are formed by connecting multiple honeycomb lattices, the honeycomb lattices are hollow, the sections are in a regular hexagon shape, the plate sections of the honeycomb plates are gaps in a regular hexagon shape, the gaps are connected with one another, and projections of side intersecting points, on the plate section of the adjacent layer, of the regular-hexagon-shaped plate section of any one honeycomb plate fall inside the regular-hexagon-shaped section of the adjacent layer plate. The multi-layer honeycomb plate is formed by overlapping the multiple layers of honeycomb plates and the partitioning plates in a spaced mode, gets closer to a real honeycomb with the multi-layer structure, and has good effects on mechanical properties, sound insulation and thermal insulation.

The invention discloses an energy-saving and environmental-friendly light partition board and a preparation method thereof and relates to the technical field of partition boards. The partition board comprises the following raw materials in parts by weight: 65-70 parts of Portland cement, 40-50 parts of calcium carbonate, 32-35 parts of calcium oxide, 25-30 parts of a paraffin-kieselguhr compositephase change material, 20-24 parts of a modified carbon fiber, 10-18 parts of activated bentonite, 10-14 parts of a rubber powder, 9-10 parts of a modified loess powder, 9-10 parts of industrial solidwastes, 9-10 parts of modified fiber granules, 4-6 parts of an early strength agent, 4-6 parts of a water reduction agent, 4-6 parts of a foaming agent, 1-3 parts of a rare-earth catalyst and 75-95 parts of water. The energy-saving environmental-friendly light partition board is relatively good in pressure resistance strength, tensile strength, anti-cracking strength and hanging property, and inaddition has sound insulation and heat preservation effects.

The invention discloses a material of an automobile thermal-insulating and sound-insulating plate. The material is made of the following materials in parts by weight: 55-65 parts of ethylene-propylene-diene-terpolymer rubber, 70-75 parts of epoxy resin, 16-18 parts of azodicarbonamide, 4-7 parts of polystyrene, 8-15 parts of polyethylene foams, 12-14 parts of expanded vermiculite, 7-11 parts of glass fiber, 9-15 parts of nano carbon black, 20-22 parts of nano aluminum oxide, 10-14 parts of aerogel, 7-12 parts of barium sulfate, 8-14 parts of polyester, 6-10 parts of expanded perlite, 14-18 parts of ceramic cotton fiber, 8-10 parts of alumina silicate fiber, 2-6 parts of sodium silicate, 5-10 parts of N-phenyl-N'-cyclohexyl p-phenylenediamine, 11-14 parts of dichlorodifluoromethane and 16-18 parts of fatty alcohol-polyoxyethylene ether sodium sulfate. The material for the automobile thermal-insulating and sound-insulating plate, which is disclosed by the invention, has good thermal-insulating and sound-insulating effects, is good in aging resistance, and is long in service life.

A compact, low cost soundproof structure having a small number of parts utilizing ribs protruding from an inner face of a case of a power source or a power transmission device. In the soundproof structure, the ribs protruding from the inner face of the case form a single or a plurality of tubular bodies. A lid member covers an opening facing an inside of the case of the single or plurality of tubular bodies formed by the ribs to form a single or a plurality of tubular body inside spaces. Also, the single or plurality of tubular body inside spaces and an internal space of the case communicate with each other through a hole or holes bored in the lid member.

The invention discloses an environment-friendly wood-plastic floor material. The environment-friendly wood-plastic floor material is prepared from, by weight, 40-65 parts of PVC (polyvinyl chloride) resin powder, 35-45 parts of straw, 5-8 parts of polyethylene, 3.5-4.5 parts of polyphenyl ether, 2-3 parts of benzoin, 4-6 parts of mica powder, 2.0-2.5 parts of zinc borate, 5.5-7.5 parts of asbestos, 5-7 parts of sycamore tree barks, 8-10 parts of bamboo powder, 6-8 parts of folium ginkgo, 6-8 parts of expanded perlite, 0.1-0.2 part of wintergreen oil, 4-6 parts of 3-hydroxybenzoic acid, 1-2 parts of laurinol sulfate, 4-6 parts of plant saponin, 0.1-0.2 part of terpilenol and 1-3 parts of white emulsion. The environment-friendly wood-plastic floor material has advantages that complete utilization of wastes, energy saving, production cost reduction and convenience in manufacturing are realized; due to adoption of the asbestos, a soundproof effect of a floor is achieved, and noise is avoided when people steps on the floor; in addition, water resistance, corrosion resistance and mildew resistance are realized, indoor application and outdoor application are both allowed, aging resistance and freeness of cracking and deformation are achieved, and people's demands are met.

The invention provides a multifunctional building external wall module, which comprises a bracket, wherein the bracket is a frame bracket and comprises a bottom and four right-angle components; the four right-angle components are coordinated with one another to form a rectangular shape; a glass layer, a sound insulation material layer, a water pipe layer, a thermoelectric power generation layer and a photovoltaic cell layer are sequentially laminated in a space in the rectangular form formed by the right-angle components; bubbles are formed in the glass layer and are uniform bubbles; the sound insulation material layer is made of a sound insulation material and the thickness is 1-1.5 times that of the glass layer; the water pipe layer comprises water pipes and a gypsum layer; the water pipes are plastic hoses, are in S-shaped distribution and are fixed by using gypsum to form a hard layer; connectors are arranged at two ends of the water pipes and can be jointed with any other water pipe; a cold end surface of the thermoelectric power generation layer is laminated with the water pipe layer and a hot end surface of the thermoelectric power generation layer is taken as a base of the photovoltaic cell layer; and the photovoltaic cell layer is formed by laminated solar cells.

The invention relates to a soundproof door with ventilation grids. The soundproof door comprises a door frame and a door leaf, wherein adjacent vertical edges of the door frame and the door leaf are hinged together. The door leaf comprises an inner layer metal plate and an outer layer metal plate, and the space between the inner layer metal plate and the outer layer metal plate is filled with rockwool. The soundproof door is characterized in that the upper part of the outer layer metal plate and the lower part of the inner layer metal plate are respectively provided with a vent hole, and thetwo vent holes are respectively provided with ventilation grids. An air flue is arranged between the inner layer metal plate and the outer layer metal plate, and the upper end and the lower end of theair flue are respectively communicated with the ventilation grids of the two vent holes. The soundproof door has both effects of sound proofing and ventilation, and the range of application is not limited. The soundproof door can be especially applied to various ships.

The invention discloses a noiseless server and a self-checking system thereof. The noiseless server comprises a server rack; a fan box is mounted in the middle of the server rack, and condensing boxes are mounted at four corners of the fan box; and a condensation pipe is mounted in the condensation tank. According to the server, efficient heat dissipation can be conducted on the whole server, the heat dissipation efficiency is improved through the synergistic effect of air cooling and water cooling, and therefore the service life of the server is prolonged; and the server is protected through the protective cover, so that the sound insulation effect is achieved, and the dustproof effect is achieved. Therefore, the server is very simple and convenient to overhaul and maintain and high in flexibility, the protective cover can be directly stretched out, the overhaul and disassembly efficiency is improved, and a worker can conveniently carry out maintenance operation. The self-checking system of the server can remotely monitor the temperature, humidity and dust in the server in real time; moreover, the operation state of the server can be remotely watched through the client, thereby facilitating the regular inspection of a worker.

The invention discloses a floor material, which is characterized by consisting of the following components in parts by weight: 15-18 parts of wood fiber powder, 30-40 parts of straw, 20-30 parts of particles, 12-15 parts of polyphenyl ether, 15-20 parts of resin, 5-8 parts of calcium carbonate, 10-20 parts of asbestos and 1-2 parts of a binding agent. The floor material disclosed by the invention has the beneficial effects that the floor material realizes full use of waste, saves energy, reduces production cost and facilitates manufacturing; by adopting the asbestos, floor has a sound insulating effect, so as to avoid sound when people step on the floor, thus meeting needs of people.

The invention discloses a composite board used for buildings. The composite board comprises the following components in parts by weight: 20-35 parts of ethylene vinyl acetate resin, 5-8 parts of gelatine powder, 15-25 parts of polystyrene foaming particles, 18-30 parts of glycerinum, 5-10 parts of silica sand, 2-5 parts of flame retardant, 1-3 parts of foaming agent and 5-8 parts of water. The composite board has the advantage of convenience in installation in the using process and a function of fire prevention due to the use of the fire retardant, the foaming agent improves the strength and tensile effect of the board and prolongs the service life of the board, and the silica sand and the glycerinum have a soundproof function.

The invention discloses a sound-proof Bluetooth earplug. The sound-proof Bluetooth earplug comprises an earplug body and an earplug head, and is characterized in that the conical earplug body is provided with a sound hole, the hemispherical earplug head is provided with a Bluetooth chip, a touch sensor and a microphone, and an elastic sponge cover is arranged on the periphery of the earplug body. By the aid of the sound-proof Bluetooth earplug with a soundproof effect, when a mobile phone ringtone or an alarm clock rings, sound can be transmitted into the earplug through Bluetooth to enable a user to hear, and the situation that the user misses a call or event reminding when wearing the earplug to take a rest or work is avoided.

The invention discloses an environment-friendly ternary elastic plastic body floor and a processing method thereof. A car floor processed by adopting the processing method has the functions of environmental protection, wear resistance, skid resistance, and sound insulation and shock absorption. The floor per se is environment-friendly and nontoxic, and odourless, and satisfies the odor standard and the VOC standard in auto industry; two material composed two-layer composite material provided by the invention integrates the characteristics of two materials; a surface layer is self-developed ternary elastic body material which is environment-friendly, wear resistant, skid resistant, and excellent in heat forming property and can be well combined with EVA, PP, and PE materials; bottom layer damping material is optimized and modified in formula, so as to be more environment-friendly, able to pass the VOC test in the auto-industry, more excellent in heat forming property, better in level and smooth degree of the material after formation, and lower in deformation rate. The method comprises steps of manufacturing a ternary elastic body layer of the floor, manufacturing a floor sound-proof layer, sending the manufactured floor ternary elastic body layer and the manufactured floor sound-proof layer to a forming roller for formation, and cooling naturally finally.

The invention relates to the technical field of windows, in particular to a side pulling structure capable of being tightly closed for a door and window cabinet. The side pulling structure comprises a frame, a fixed window sash and a movable window sash; grooves matched with the fixed window sash and the movable window sash up and down are formed in the frame, a front protection plate and a rear protection plate are arranged on the front end face and the rear end face of the groove respectively, the rear end of the fixed window sash abuts against the rear protection plate, and a gap is reserved between the fixed window sash and the front protection plate; first supporting parts and second supporting parts are installed on the upper side and the lower side of the movable window sash correspondingly; the first supporting parts are installed at the inclined face end of the movable window sash, and the second supporting parts are installed at the non-inclined-face end of the movable window sash; each first supporting part comprises a connecting rod connected to the movable window sash, a bearing wheel installed at the bottom of the connecting rod and a first guide wheel installed on the side wall of the connecting rod; and the right side of each groove is provided with a guide plate which is triangular in an overhead view. The side pulling structure is flexible in opening and closing and stable in sliding, the inclined faces of the window sashes on both sides are in close contact with each other when the window sashes are closed, so that the possibility that air, dust and the like pass through is reduced, and the sealing and sound insulation effects are improved.

The invention provides a motor reduction gearbox and belongs to the technical field of gearboxes. The motor reduction gearbox solves the problem that the noise pollution is serious when the existing motor reduction gearbox works. The motor reduction gearbox comprises a gearbox box body, an end cap and a gear reduction mechanism, wherein the end cap is matched with the box body, a containing cavity is formed between the gearbox box body and the end cap, the gearbox reduction mechanism is arranged in the containing cavity, a lower annular noise enclosure is fixedly connected with an inner end surface of the gearbox box body, the annular noise enclosure is arranged on the gear reduction mechanism in an encircling mode, and an upper annular noise enclosure which is matched with the lower annular noise enclosure is fixedly connected with the inner end surface of the end cap. The motor reduction gearbox has the advantages of being small in noise, high in intensity, and good in oil sealing performance.

The invention relates to a heat preservation graphene decorative sheet in a building outer wall and a production flow thereof. The graphene decorative sheet comprises an aluminum-magnesium alloy hardness layer (3) used as a basic layer, a decorative layer (2) is composited onto the outer surface of the aluminum-magnesium alloy hardness layer (3), a nano ultraviolet protective layer (1) is composited onto the outer surface of the decorative layer (2), a polyurethane heat preservation layer (4) is composited onto the inner surface of the aluminum-magnesium alloy hardness layer (3), an aluminum-foil anticorrosion layer (5) is composited onto the inner surface of the polyurethane heat preservation layer (4), the nano ultraviolet protective layer (1), the decorative layer (2), the aluminum-magnesium alloy hardness layer (3), the polyurethane heat preservation layer (4) and the aluminum-foil anticorrosion layer (5) are sequentially composited into a whole body from top to bottom, and the decorative layer (2) is a decorative film or a coating. Compared with the prior art, the heat preservation graphene decorative sheet is not only good in heat preservation effect, energy-saving, environment-friendly and high in practicability, but also durable, long in service life and good in flame retardancy and corrosion resistance.