3372results about "Sound proofing" patented technology

The invention relates to the technical field of sound absorption, noise reduction and impact resistance, in particular to a multifunctional tunable bionic sound absorption and collision prevention integrated superstructure and a preparation method thereof.The multifunctional tunable bionic sound absorption and collision prevention integrated superstructure comprises a shell, an upper sound absorption layer, a lower sound absorption layer and a middle collision prevention layer, the sound absorption layer is provided with a plurality of curved-surface microwell plates which are connected end to end to form a cavity, and the embedded pipe is combined with the cavity to form a Helmholtz resonator; the anti-collision layer is composed of an energy absorption unit array. The preparation method comprises the steps that a three-dimensional model is firstly built, then a laser scanning mode and parameter printing are set, then heat treatment is conducted, then cutting and layer taking are conducted, and finally the superstructure is manufactured through glue joint. The sound absorption and noise reduction functions and the energy absorption and anti-collision functions are integrated, the sound absorption performance is improved through the bionic structure, energy is efficiently absorbed through the middle layer dot matrix, adjustable performance and lightweight design are achieved through parameterized design, the additive manufacturing process is simple, convenient and efficient, and large-scale production and application are facilitated.

A thermoplastic frame for holding acoustical material has extruded square plastic tubing that is inserted or snap-fit onto corner connectors and T-connectors to make an enclosure that houses and compresses the acoustic material. During assembly of the frame, the acoustic material is inserted in the open side of a secondary frame assembly and enclosed and compressed with a cap assembly snap-fit onto the secondary frame assembly.

The invention provides a fabricated building wall and a construction method.The wall comprises a frame keel, a noise reduction keel, a wall core material and an outer wallboard, an annular cavity with openings in the two sides is formed in the frame keel, and the noise reduction keel and the wall core material are located in the annular cavity; openings in the two sides of the annular cavity are blocked by the external wall panel; the cross section of the noise reduction keel comprises at least two Z-shaped structures connected end to end, and the Z-shaped structures are used for dividing the annular cavity into a plurality of noise reduction reflection cavities. The noise reduction keel is optimally designed, and the wall body core material and the vibration reduction strips with the sound absorption effect are additionally arranged, so that the sound insulation performance of the wall body is effectively improved, the sound insulation effect of the wall body is improved without thickening the wall body or increasing the number of external wall panels, and the problems of cost increase, quality reduction and the like caused by the sound insulation effect are avoided; by optimally designing the shapes and structures of the joints of the heaven and earth keels, the side wrapping keels, the vibration reduction keels and the wall body core materials, the installation efficiency, stability and tightness of the wall body are improved.

The invention discloses an assembly type efficient sound insulation cover convenient to install, and relates to the technical field of sound insulation covers. Comprising a plurality of pieces of main body square steel, the main body square steel are linearly and evenly distributed at equal intervals, jacking mechanisms used for improving the bottom supporting strength are arranged on the inner walls of the main body square steel correspondingly, and assembly type connecting mechanisms used for improving the connecting strength and stability are installed in the main body square steel correspondingly; according to the assembly type efficient sound insulation cover convenient to install, main body square steel is inserted and limited in a penetrating and inserting mode through the assembly type connecting mechanism, the defect that limiting performance is insufficient due to the fact that a lap joint mode is directly used in a traditional structure is overcome, the whole assembly process is simpler and more convenient, rubber pads and expansion water stop strips are arranged at splicing joints, and the assembly efficiency is improved. The vibration transmission of equipment can be blocked, the inherent frequency is kept away from the vibration frequency of the equipment, secondary noise caused by resonance is avoided, meanwhile, through gaps are reduced, the noise is prevented from leaking from the insertion hole position, and the problem of noise leakage is solved.

An integral assembly type operating room takes an operating room as a medical unit, an enclosure structure comprising a bottom groove, an outer groove, a main beam, a wall plate, an inclined ceiling hanging groove, a filling plate hanging groove, an air supply ceiling, cleaning equipment and a power distribution system are integrally and modularly designed, and industrial production and standardized installation are achieved. After assembly is completed, the cleaning equipment wrapped by the silencing enclosure is integrally installed in a passageway between the decorative plate and the framework, an air return opening and an air exhaust opening are formed in the framework, and the air return opening and the air exhaust opening are connected with the cleaning equipment and an exhaust fan through composite silencing air pipes correspondingly. By means of the double noise reduction scheme formed by the composite noise reduction air pipe and the noise reduction enclosure structure, noise generated by the cleaning equipment and regeneration noise generated in the air flowing process can be effectively controlled within the standard range. The invention further provides an assembly method of the integral assembly type operating room, through the assembly method, the integral type operating room can be rapidly assembled, the assembly efficiency is improved, and the construction period is greatly shortened.

The invention relates to the technical field of floor slab concrete, and discloses aerated concrete applied to sound insulation and heat preservation of a floor slab and a preparation method of the aerated concrete aiming at the problems that an existing sound insulation floor slab containing the aerated concrete is poor in structural stability, namely the sound insulation effect and the long-term effect of mechanical properties are poor and the like. Comprising 30-40 parts of fly ash, 25-35 parts of sand, 15-20 parts of ardealite, 10-15 parts of quick lime, 5-8 parts of silicon-aluminum porous microspheres, 3-5 parts of slaked lime, 1-2 parts of Fe3O4-polypropylene fiber and 0.2-0.5 part of aluminum powder. The preparation method of the silicon-aluminum porous microspheres comprises the following steps: mixing a silicon source, an aluminum source and a surfactant, and uniformly stirring to obtain silicon-aluminum homogenate; and adding nano titanium dioxide, carrying out ultrasonic dispersion and freeze drying, transferring into a heating furnace, and heating and calcining to obtain the silicon-aluminum porous microspheres. The supporting and strengthening effects on pores are realized through gas production reaction and the like in the material, so that the structural strength and durability of the aerated concrete are improved.

A sound absorbing device according to an exemplary embodiment of the present invention comprises a plurality of sound absorbing cells arranged adjacent to each other on a plane, and each of the plurality of sound absorbing cells includes: a chamber having a volume therein, and in which a plurality of micro holes is perforated on a front surface in which a sound wave is incident; and a neck part introduced and extended to a rear of the front surface and penetrated by a through hole for communicating the outside and the chamber.

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 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 discloses a polyester fiber acoustical board with high yield strength. The polyester fiber acoustical board comprises a micro-perforated metal surface layer, a gradient density polyester fiber layer, a honeycomb metal framework layer and an elastic damping bottom layer which are sequentially stacked and fixed through mucilage glue from top to bottom. A vertically-distributed metal surrounding plate is arranged around the side edge of the micro-perforated metal surface layer, the metal surrounding plate and the micro-perforated metal surface layer are of an integrally-formed structure, and the gradient density polyester fiber layer and the honeycomb metal framework layer are wrapped by the metal surrounding plate. And the honeycomb metal framework layer is fixed with the adjacent upper and lower layers through mucilage glue, and is also fixed with the metal coaming through rivets. By means of the innovative composite lamination design, the strength defect of a traditional polyester fiber acoustic board is effectively overcome. The micro-perforated metal surface layer and the integrally formed metal coaming form a rigid outer frame, so that the internal fiber layer is protected from mechanical damage, and the overall flexural rigidity is remarkably improved through the bearing effect of the metal framework.

An acoustic curved ceiling baffle and system that incorporates sidewalls with cuts or kerfs, top and bottom spines and ribs to properly configure the curves in the acoustic baffle, and that can be quickly and easily installed onto ceilings using integrated locks, cables or magnets, to produce a curved baffle system, and to provide an aesthetically pleasing image, along with a reduction in unwanted noise and / or room acoustics.

The utility model relates to the field of power transformation engineering sound barriers, in particular to a power transformation engineering movable noise reduction barrier capable of being patrolled externally, which comprises a plurality of steel columns, a steel bottom beam positioned at the lower sections of the steel columns and a steel top beam positioned at the upper sections of the steel columns, and the plurality of steel columns, the steel bottom beam and the steel top beam form a sound barrier frame. A sound barrier plate is arranged between every two adjacent steel columns, and the sound barrier frame and the sound barrier plates form a noise reduction barrier. The sound barrier construction period of the transformer substation and the converter station is shortened. According to the utility model, on-site material, machine tool and personnel investment is reduced, construction waste emission is reduced, noise pollution is reduced, and carbon emission is reduced. Daily patrol of operators is facilitated, the device can be quickly moved when the device needs to be carried during maintenance, a channel is reserved for carrying the device, the power failure time is effectively saved, and the working efficiency is improved. The technical problems that the construction period is long, resources are wasted, pollution is serious, and replacement and carrying are inconvenient can be solved.

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 provides an assembly type wall body for a high-rise building, which comprises a left wall plate and a right wall plate, a plurality of fixing steel bars which are arranged at equal intervals are arranged at the upper ends of the left wall plate and the right wall plate, a plurality of butt joint holes which are uniformly distributed are arranged at the lower ends of the left wall plate and the right wall plate, a rapid preliminary fixing mechanism is arranged on the front side of the left wall plate, and a rapid preliminary fixing mechanism is arranged on the rear side of the right wall plate. And a sealing assembly is arranged between the left wall plate and the right wall plate. According to the fabricated wall body for the high-rise building, the two wallboards can be rapidly and primarily fixed, so that the two wallboards can be rapidly and primarily fixed without more manpower and complex tools to ensure that the two wallboards are horizontal for subsequent pouring, the labor cost is remarkably reduced, the construction efficiency is improved, and the construction cost is reduced. The construction period is shortened, and the overall construction cost is further reduced.

The utility model relates to the technical field of assembly type wall accessory devices, in particular to a novel assembly type building outer wall connecting component and an assembly type building, which have the advantages that the operation is simple, the connection between walls is convenient, the stability between the walls is improved, and the assembly efficiency of the walls is improved. According to the novel fabricated building outer wall connecting component, the two sets of shielding plates are installed through the fixing assemblies, and the two sets of shielding plates shield a gap generated when the two sets of fabricated walls are assembled, so that the attractiveness of the fabricated walls is improved, mice are prevented from entering a room through the gap, and therefore the practicability is enhanced. Comprising two sets of assembly type wall bodies, two sets of shielding plates, two sets of first clamping blocks and two sets of second clamping blocks, the two sets of assembly type wall bodies are fixed through first clamping assemblies, and the two sets of assembly type wall bodies conduct secondary reinforcement on the first clamping assemblies through tenon-and-mortise assemblies.

To provide a partition wall using wood finishing material and having excellent sound insulation performance.SOLUTION: A partition wall P includes sound insulators 11 and 12 arranged and erected facing each other at a predetermined interval, a wood finishing material 20 covering the surface of at least one of the sound insulators 11 and 12, and a support member 30 for the sound insulators 11 and 12 and the wood finishing material 20, which is interposed between the sound insulators 11 and 12. At a butt joint 25 of the wood finishing material 20, a flange 31b of the support member 30 is in contact with the sound insulator 11. The wood finishing material 20 is attached to the flange 31b of the support member 30 by means of a fitting (screw 17) that passes through the sound insulators 11 and 12.SELECTED DRAWING: Figure 1

The invention relates to the field of sound insulation of partition wall boards, in particular to an assembly type energy-saving partition wall board with multiple sound insulation structures and a sound insulation method, the assembly type energy-saving partition wall board comprises a first partition wall frame board, and a second partition wall frame board is arranged above the first partition wall frame board. According to the invention, through the insertion of the L-shaped butt joint groove frame and the L-shaped butt joint frame, the edges of the first partition wall frame plate, the second partition wall frame plate and the third partition wall frame plate can be overlapped to a certain extent after the partition wall frame plate, the second partition wall frame plate and the third partition wall frame plate are spliced, so that the gap formed after the aluminum alloy sound insulation plate and the glass fiber sound insulation plate are integrally spliced is reduced, and the sound insulation effect is improved; by means of the structure, building and splicing can be rapidly completed without support of an external frame, the aluminum alloy sound insulation plates and the glass fiber sound insulation plates can be detached and replaced as a whole, sound waves can be rapidly absorbed due to the effect of the arc-shaped reflection grooves, and on the basis that a thick sound insulation layer is not needed, the sound insulation effect is greatly improved. The sound insulation effect, the splicing efficiency and the overall stability are improved, and meanwhile the use cost is reduced.

A plant sound insulation screen comprises sound insulation plates continuously arranged on one side of a plant wall, a preset interval is formed between every two adjacent sound insulation plates, and supports are arranged at the positions, corresponding to the adjacent sound insulation plates, of the wall. The support is of a metal plate structure, the lower end of the support is provided with a supporting plate perpendicular to the enclosing wall and extending outwards and used for supporting the bottom faces of the ends of the sound insulation plates, the top of the support is flush with or higher than the top faces of the sound insulation plates, and the width of the support is larger than the interval between the adjacent sound insulation plates. The bracket is fixed on the surface of an enclosing wall through expansion screws; locking screws are vertically arranged on the support in a penetrating mode and located in the intervals between the adjacent sound insulation plates, and pressing plates are arranged on the locking screws in a sleeving mode and used for pressing the side portions of the sound insulation plates. The scheme facilitates later replacement of the sound insulation board, is more convenient to disassemble and assemble, and can effectively ensure the uniformity and sound insulation effect of the sound insulation screen before and after replacement of the sound insulation board.

The utility model relates to the technical field of silence bins, in particular to a silence bin assembling device which comprises a supporting bottom frame, a stand column is fixedly installed on the surface of the supporting bottom frame, a top frame is fixedly installed on the top of the stand column, a limiting mechanism is arranged on the surface of the stand column, and the limiting mechanism comprises a fixing support. The fixing support is fixedly installed on the surface of the stand column, a first sound insulation strip is fixedly connected to the surface of the fixing support, a side plate is connected to the surface of the first sound insulation strip in a contact mode, a spring is fixedly connected to the surface of the stand column, and a limiting rod is fixedly connected to the surface of the spring. According to the utility model, the side plate can be limited by the limiting rod only by pushing the side plate to the fixed bracket to extrude the first sound insulation strip, and the side plate can be mounted without manual support, so that the number of mounting personnel is reduced, the mounting cost is reduced, and the competitiveness of a product is further improved.

Method for producing of a sound-absorbing panel (F), comprising a step of preparing a predetermined amount of cellulose fibres and a step of immersing the cellulose fibres in a first water basin (100) to form a cellulose pulp (P1). The method then comprises a step of preparing a predetermined amount of textile fibres (V) and a step of mixing, in water, the cellulose pulp (P1) with the textile fibres (V) to obtain a final pulp (P3) and a step of depositing the final pulp (P3) on a forming mould (300). The method then comprises a step of pressing at least the final pulp (P3) in order to cause an at least partial removal of the water contained in the final pulp (P3) making a fibre mat (T) and a step of drying the fibre mat (T) so as to cause evaporation of the water remained in the fibre mat (T) making a sound-absorbing panel (F).

The invention relates to the technical field of concrete wallboards, and discloses a single-layer concrete internal partition wallboard which comprises a wallboard body formed by pouring concrete, a plurality of groups of reinforcing units are arranged in the wallboard body, each reinforcing unit comprises a first framework and two second frameworks, the second frameworks are symmetrically distributed on the two sides of the first framework, and the reinforcing units are arranged in the first frameworks. The opposite faces of the first framework and the second framework are each provided with a bent part, the bent parts on the two sides of the first framework are symmetrically distributed to form a pouring cavity, and the occlusion strength of the first framework, the second framework and concrete is improved through the bent parts and the pouring cavity. According to the internal partition wall board, the reinforcing units are arranged in the internal partition wall board, so that the stability of the wall board is greatly enhanced, the problems of later deformation, separation and the like are reduced, the maintenance cost is reduced, the service life of the wall board is prolonged, and the wall board is not prone to damage and collapse when encountering an earthquake or external force impact; and life and property safety of people in the building is guaranteed.

The invention discloses a manufacturing method of a composite wallboard for bamboo engineering, which comprises the following steps of: S1, coating any surface of a panel layer with an adhesive by taking a recombined bamboo or bamboo laminated wood board as the panel layer; s2, connecting the core layer frame between the two panel layers to form a plate blank; a filling hole cavity is formed in the core layer frame; s3, the plate blank is subjected to hot pressing or cold pressing forming under the pressure condition of 0.5-10 MPa; and S4, the filling hole cavities of the core layer frame are filled with resin, and after the resin is cured, the composite wallboard for the bamboo engineering is obtained. Compared with the technical scheme that the resin is injected firstly and then the pressing forming is performed, when an excellent heat preservation and heat insulation effect is formed, the bonding effect during resin curing further strengthens the connection firmness degree and integrity of the panel layer and the core layer; the adhesive area can be greatly increased, one-time forming is achieved during strengthening, and the phenomenon that the surface core layer is prone to disengagement and layering during later use is avoided.

The utility model discloses a conjoined junction box with a sound insulation function. The conjoined junction box comprises a first junction box, a second junction box and a sound insulation body, the sound insulation body is arranged between the first junction box and the second junction box; the shells of the first junction box and the second junction box are also wrapped with a third noise reduction layer; and a fixing piece is arranged outside the one-piece wire box. According to the invention, by arranging the one-piece junction box in the household wall, the problems of repeated construction and noise generated in the construction process when the junction box is independently arranged in the household wall can be avoided, the damage to the structure of the household wall in the construction process is reduced, and in addition, the sound insulation body is arranged between the first junction box and the second junction box, so that the sound insulation effect is improved. In the process of installing the junction box on the household wall body, the mute effect in the installation process of the junction box at the same position between household splitting can be achieved, and the obvious noise reduction effect in the use process of the junction box in the household wall can be achieved.

The invention relates to the technical field of solar energy utilization of building envelope structures, and discloses a heat collection and storage integrated fabricated external wall panel connected by built-in heat pipes, which comprises a glass cover plate, an air layer, a wall outer leaf layer, a heat insulation layer and a wall inner leaf layer which are sequentially arranged from outside to inside, and the glass cover plate and the air layer form thermal resistance on the outer side of the wall body, so that the heat loss is effectively reduced. Meanwhile, heat loss of the inner side of the wall body at night is reduced through the heat preservation layer, and it is ensured that the wall body still has certain heat preservation performance under the extreme weather condition of lack of solar radiation. Besides, a heat pipe connecting piece is further arranged in the wall body, heat absorbed by the solar energy absorption coating is efficiently transferred into a room by utilizing the one-way heat transfer characteristic and efficient heat conduction performance of a heat pipe technology, and the design not only improves the thermal performance of the external wall panel and reduces the energy consumption of a building, but also realizes effective utilization of solar energy at the same time.

The present invention provides a raw material composition suitable for producing rigid isocyanurate foams that exhibit both excellent energy absorption and sound absorption properties, while also exhibiting excellent foam moldability, appearance, and breathability. The raw material composition for rigid isocyanurate foams of the present invention contains a polyol composition and a polyisocyanate. The polyol composition includes: a tri- or higher functional polyether polyol (C) having a hydroxyl value of 300 mgKOH / g or more; a polyether polyol (A) different from the polyether polyol (C) and having an ethylene oxide content of 50 mass% or more, based on the total amount of alkylene oxide in the polyether polyol (A); and a polyether polyol (B) different from the polyether polyol (C) and having an ethylene oxide content of 10 mass% or less, based on the total amount of alkylene oxide in the polyether polyol (B). The raw material composition has an isocyanate index of 105 or more and 400 or less. The content of component (A) is 30 parts by mass or more and 50 parts by mass or less, and the content of component (C) is 5 parts by mass or more and 35 parts by mass or less, based on 100 parts by mass of the total amount of the raw material composition excluding the polyisocyanate.

An acoustic baffle system that includes an acoustic baffle coupler, an acoustic baffle, and one or more fasteners to secure the acoustic baffle system to a ceiling. The acoustic baffle coupler includes a body comprising an upper end, a first lateral end, a second lateral end, a lower end, a slot defined in the upper end and extending from a first end to a second end, a first channel defined in the first lateral end and extending from the first end to the second end, and a second channel defined in the second lateral end and extending from the first end to the second end. An acoustic baffle is secured into the first and second channels of the acoustic baffle coupler. The one or more fasteners are disposed within the slot of the acoustic baffle coupler and the one or more fasteners are secured to the ceiling.

The utility model relates to the technical field of building outer walls, in particular to a building energy-saving outer wall heat preservation structure which comprises a shell, a second groove and a third groove are formed in the two sides of the shell respectively, a sliding rod is fixedly connected into the second groove, a spring is arranged outside the sliding rod, one end of the spring is fixedly connected with the inner wall of the second groove, and the other end of the spring is fixedly connected with the inner wall of the third groove. The other ends of the springs are fixedly connected with moving plates, the side faces of the moving plates are fixedly connected with limiting rods, the moving plates are slidably connected with the sliding rods, the tops of the moving plates are fixedly connected with sliding blocks, sliding grooves are formed in the tops of the first wear-resisting layer and the shell, the sliding blocks are slidably connected in the sliding grooves, and clamping blocks are fixedly connected into the third grooves. By arranging the sliding grooves, the sliding rods, the moving plates, the limiting rods and the springs, the external wall heat preservation structure can be conveniently mounted and dismounted, and the problems that a traditional external wall heat preservation structure is not high in firmness degree and prone to falling off are solved.

The utility model relates to the technical field of noise reduction structures, and discloses a rapid assembly type acoustic hood which comprises a plurality of steel stand columns and a plurality of steel beams, the steel stand columns and the steel beams are connected through bolts and jointly form a supporting structure of the acoustic hood, and a top face sound absorption and insulation plate is arranged at the top of the acoustic hood. The top surface sound absorption plates are identical in modulus, and the wall surface sound absorption and insulation plates are identical in modulus. The top surface sound absorption plates and the wall surface sound absorption and insulation plates are connected in an embedded mode through mortise and tenon joint structures. The edge of the top face assembly is bent downwards, so that an installation space is formed on the bottom face of the structure, and the top face sound absorption and insulation plate is buckled to a supporting structure composed of the steel beam, the steel stand column and the wall face sound absorption and insulation plate through the installation space. The connecting mode between the top face / wall face sound absorption and insulation plates is changed into the mortise and tenon joint connection mode, and the top face sound absorption and insulation plates are buckled to the supporting structure, so that the technical problem that in the prior art, the cost and the sound insulation performance of an acoustic enclosure cannot be considered at the same time is solved.