38 results about "Perforation plate" patented technology

The invention provides a flow guide ring structure, a fan assembly, an air conditioner and a noise reduction control method thereof.The flow guide ring structure comprises a flow guide ring, a noise reduction unit is arranged on the periphery of the flow guide ring, the noise reduction unit comprises a first sound absorption assembly, and the first sound absorption assembly comprises a first shell cover, a first partition plate and a first movable plate; the first shell cover covers the peripheral face of the flow guide ring to form a first cavity, the first cavity is divided by the first partition plate into a first sound absorption cavity and a second sound absorption cavity, the first sound absorption cavity and the second sound absorption cavity are different in size, and a plurality of first communicating holes are formed in a first perforated plate section of the first partition plate in a penetrating mode. The first movable plate is movably arranged on the first perforated plate section so as to adjust the number of the shielded first communicating holes. According to the flow guide ring structure, self-adaptive adjustment and noise reduction can be carried out according to the change of the operating parameters, so that noise of different frequencies generated under different operating parameters is effectively reduced, the frequency range of effective noise reduction is widened, the noise reduction effect is improved, and the mute experience comfort of a user is improved.

The application provides a sandwich micro-perforated plate sound absorption structure based on triple periodic minimal surface, comprising: a sandwich layer, comprising a plurality of triple periodic minimal surfaces arranged in an array in the XY direction; a plurality of sandwich layers arranged in an array in the Z direction, and a micro-perforated plate arranged between adjacent sandwich layers, wherein the micro-perforated plate is provided with a plurality of micro-holes; the inner cavities of the plurality of triple periodic minimal surfaces are connected in the XY direction and communicated in the Z direction through the micro-holes, thereby forming an inner cavity series connection system; and the outer cavities of the plurality of triple periodic minimal surfaces are connected in the XY direction and communicated in the Z direction through the micro-holes, thereby forming an outer cavity series connection system. The parallel structure of the inner cavity series connection system and the outer cavity series connection system is entangled and circled with each other, thereby effectively increasing the number of sound absorption peaks, so that the sound absorption effect of medium and low frequencies and wide frequencies is achieved. Meanwhile, the space utilization rate is high, and the structure weight is effectively reduced; and the structure volume can be changed according to the use requirement, and the compatibility is very strong.

To provide a perforated panel conveying mechanism that can prevent a perforated panel from being deformed due to forward and backward movements of a conveying pin, by restricting the conveying pin from wobbling when moving the conveying pin up and down to and from a transparent hole formed in the perforated panel.SOLUTION: A hitch feeding mechanism 24, as a perforated panel conveying mechanism, is provided with: a reciprocating body 25 having a concave hole 25A formed on an upper surface thereof, which is arranged in a conveying direction of a metal belt-like body 81; a conveying pin 27 in which an energizing member 27C whose upper end part contacts an inner surface of an upper bottomed-part of an upper bottomed-cylindrical body and whose lower end part contacts the concave hole 25A is stored and which intrudes into a transparent hole 89 of the metal belt-like body 81; and an upper surface plate 28 mounted on an upper surface of the reciprocating body 25, which has an insertion hole 28A through which the conveying pin 27 is inserted. In the conveying pin 27, plane parts 27A are formed in a required range in a circumferential direction on a side peripheral surface thereof. A flange part 27B is formed at a lower end part of the plane part 27A. An opening part at a lower surface side of the insertion hole 28A is formed in a turning restriction hole, and the conveying pin 27 is retained by the flange part 27A.SELECTED DRAWING: Figure 7

Methods and systems for uniformly cooling a dome within a plasma treatment system are disclosed. The methods and systems utilize a diffuser including a perforated plate and a cone. The perforated plate includes a center portion and multiple arrays of holes with each array being located circumferentially at a different distance from the center. The cone extends away from the center. The diffuser spreads cooling gas more uniformly across the surface of the dome.

The utility model provides a kind of positioning and guiding type butt joint perforated collection pipe, it is related to perforated collection pipe technical field, including collection pipe body, and the inside wall of collection pipe body is perforated and is equipped with placing opening, and collection pipe body inside is equipped with storage groove, and the through hole is perforated between storage groove and placing opening, and the inside wall of storage groove is perforated and is equipped with threaded hole.The utility model in the process other tasks, staff rotates handle, handle drives threaded rod rotation, threaded rod moves along threaded hole, so that storage plate drives connecting plate to leave connecting groove, staff can extract perforated plate from placing opening at this time, replace the perforated plate with other diameter through hole, insert perforated plate into placing opening, when connecting groove moves to connecting plate side, staff reversely rotates handle, storage plate moves along storage groove, connecting plate enters connecting groove, so it can be fixed, improve replacement efficiency, reduce cost.

Apparatus for location within a sewage conduit of a building comprises an open-topped chamber which includes entry and discharge openings and a removable cover for access to the contents of the chamber. The discharge opening is partially covered with a perforated plate to prevent the discharge from the chamber of relatively untreatable matter, this being subsequently removed through the access cover.

1. The name of the design product: perforated plate (Y02). 2. The use of the design product: for indoor walls, play a role in environmental protection, moisture-proof, fireproof and sound-absorbing. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective drawing.

The invention relates to the technical field of fan noise reduction, in particular to an adjustable fan acoustic liner and a noise reduction method and system.The adjustable fan acoustic liner comprises a perforated plate, a honeycomb cavity layer, a cavity layer filling block and a supporting layer; the cavity layer filling blocks are arranged on the supporting layer in an array mode, the honeycomb-shaped cavity layer is arranged on the outer sides of the cavity layer filling blocks in a sleeving mode, and the perforated plate covers the honeycomb-shaped cavity layer; the cavity layer filling blocks are arranged in an array mode to form a plurality of cavity adjusting areas, and the cavity adjusting areas are arranged in the circumferential direction of the supporting layer at intervals. The cavity layer filling blocks are arranged in an array mode, the multiple cavity adjusting areas are obtained, the noise reduction requirements of noise of different frequencies can be met by changing the heights of the cavity layer filling blocks, the noise reduction frequency can be widened by arranging the multiple cavity layer filling blocks of different heights in the cavity adjusting areas, multi-section coverage from low frequency to high frequency is achieved, and the noise reduction effect is improved. The sound absorption coefficient in a target frequency band can reach 0.9 or above, and the noise reduction requirement is met.

The utility model relates to a simple labyrinth type silencing box, which comprises an outer shell, a perforated plate and a sound absorption layer, the outer shell is detachably fixed at a ventilation opening of an acoustic facility of an acoustic silencing box, and a silencing channel communicated with the outside and the ventilation opening of the acoustic facility is arranged in the outer shell. The perforated plate is installed on the inner wall of the silencing channel, and the sound absorption layer is filled in a cavity between the perforated plate and the outer shell. The silencing box is arranged at the ventilation opening of the acoustic facility, so that the acoustic environment in the acoustic facility is not influenced by external environmental noise while the ventilation of the acoustic facility is ensured. Compared with an existing ventilation silencer, the ventilation silencer has the advantages that the structure is simple and light, and the construction is convenient; special requirements on materials and a manufacturing process are avoided, and the manufacturing cost is low; the ventilation and noise reduction requirements of acoustic facilities are met; and installation and maintenance are convenient. And the silencing boxes with different specifications and sizes can meet the requirements of ventilation quantity of different acoustic facilities.

The invention relates to a rainfall system comprising: - a reservoir (4) having four lateral walls, - a perforated plate arranged under the reservoir, the perforated plate having regularly spaced perforations, - a receptacle (8) arranged below the perforated plate; characterized in that it comprises two butterfly flaps (40, 42) carried by two opposite lateral walls of the receptacle, each butterfly flap being pivotally mounted about an axis relative to the receptacle between a position in which the perforations are closed and a position in which the perforations are open; in the closed position, the two butterfly flaps are arranged in the same horizontal plane and close the perforations of the perforated plate; in the open position, each butterfly flap extends along a lateral wall of the receptacle. Figure to be published with the abbreviation: Figure 3

A foldable test bench comprises a perforated plate or template (2) having a plurality of seats (3) for the positioning of respective probes (4), a supporting structure (5) for the stable positioning of said template (2) on a work surface (P) in at least one raised position with respect thereto, wherein the supporting structure (5) comprises a first articulated arm (10) suitable to connect it to said template (2) and allowing the adjustment of the position of said template (2) with respect to the work surface (P) as well as its positioning in a closed non-operative position.

An apparatus (1) for producing a fluidized bed (2) containing a suspension of high and low density particles formed within a vessel (5) of a particle separator (3) is provided. The apparatus 1 has a plurality of rakes (10), each of which is rotatably mounted within a container (5). Each rake (10) has one or more radially extending rake arms (20). Each rake arm (20) has a blade assembly (30) extending therefrom for cutting suspension in the fluidized bed (2). The blade assembly (30) may include a plurality of interconnected frame members (35) or one or more spaced apart blades (48) extending into the fluidized bed, wherein each blade includes a rod, a rod, a planar element, a paddle, a perforated plate, or a plate-like structure.

The invention relates to a device (10) for shrinking a film (F) onto at least one article (A). The device (10) has a conveying device (12) for conveying the at least one article (A) and the film (F). The device (10) further has a fluid supply device (14, 16) for supplying a fluid to the at least one article (A) for shrinking the film (F) onto the at least one article (A). The fluid supply device (14, 16) has a perforated plate (18, 20) with rows (22) of outlet holes for releasing the fluid towards the at least one article (A). The fluid supply device (14, 16) further comprises an adjusting element (28) with at least one row of holes (30) which lies over at least one of the rows of holes (22) of the perforated plate (18, 20) and is movable to selectively release or cover this at least one row of holes (22) of the perforated plate (18, 20).

The utility model relates to the technical field of silk heating technology discloses a silk heating equipment for elasticizer, including heating box, both sides of heating box all are established through groove, and the inside fixed connection of through groove has the perforated plate, the inside of heating box is provided with heating assembly, heating assembly includes heating roller no.

The utility model relates to building curtain wall technical field, concretely relates to a sunshade type breath formula curtain wall structure, and the sunshade type breath formula curtain wall structure is by several curtain wall units, and is equipped with ventilation structure between upper and lower layer curtain wall units, and the curtain wall unit includes inner layer curtain wall and outer layer curtain wall, and the inner layer curtain wall includes inner layer glass, inner layer vertical keel, inner layer cross keel and inner layer opening window, and the outer layer curtain wall includes outer layer glass and outer layer interlayer decorative plate, and the ventilation structure includes perforated ventilation board, insect screen, horse path and perforated plate. The utility model discloses a sunshade type breath formula curtain wall structure, greatly improves the thermal performance and sound insulation performance of curtain wall whole through setting double breath formula curtain wall.

This invention relates to the field of sound-absorbing structure technology, and more particularly to a multi-layer abrupt cross-section perforated plate low-frequency sound-absorbing structure, comprising a small-diameter perforated plate, a large-diameter perforated plate, small perforations, and large perforations. The large-diameter perforated plate is cylindrical. The through holes in the abrupt cross-section perforated plate are all fixedly connected to the outer wall of a large-diameter perforated plate. The large-diameter perforated plate has a through-hole. The small-diameter perforated plate is fixedly connected to the surface of the large-diameter perforated plate away from the rigid wall. The small-diameter perforated plate has a coaxial through-hole. The small and large perforations on each of the abrupt cross-section perforated devices are interconnected. This invention solves the problem of poor sound absorption performance of porous sound-absorbing materials for low-frequency noise in the prior art. Through the combination of the multi-layer abrupt cross-section perforated plate structure, the sound-absorbing device's ability to absorb and dissipate low-frequency noise is improved.

The invention provides an acoustic liner, a power propulsion system and a design method thereof. The acoustic liner comprises a perforated plate, a cavity structure and a back plate. The perforated plate is provided with through holes; the cavity structure comprises a plurality of pipelines; the perforated plate and the back plate are connected with the two opposite sides of the cavity structure correspondingly, and therefore the perforated plate, the cavity structure and the back plate jointly define a plurality of cavities with the tops open and the bottoms closed. Wherein the perforated plate comprises a plate body and a plurality of thickening parts, the thickening parts correspondingly extend into the multiple pipelines from the plate body in the thickness direction, and the thickening parts are attached to the pipelines, so that the depth of the cavity is limited by the thickening parts and the back plate; moreover, the portion of the perforated plate, the portion of the pipeline and the portion of the back plate which jointly define the single cavity provide a single sound absorption structure unit, and the thicknesses of the thickening portions of at least two sound absorption structure units are different.

The invention relates to a device for providing disposable laboratory articles, comprising • a rectangular perforated plate having a plurality of holes for receiving disposable laboratory articles, • a box, comprising o a bottom wall, o first side walls which extend upward from the bottom wall and the upper edges of which delimit a first opening for the insertion of the perforated plate, and o at least one support structure within the box for the purpose of holding the perforated plate at a distance from the bottom wall, and • a cover, comprising o a top wall, and o second side walls which extend downward from the top wall and the lower edges of which delimit a second opening, • wherein o the perforated plate and the box are connected via a first hinge about which the perforated plate can, from a position laterally next to the box, be folded against the support structure, o the lid and the box are connected via a second hinge about which the lid can, from a position laterally next to the box, be folded into a position covering the box, and o the perforated plate, the box, the lid and the hinges are a component produced as one piece.

1. Name of the product in this design: Perforated plate (Y03). 2. Purpose of this design: For use on interior walls, serving as an environmentally friendly, moisture-proof, fire-resistant, and sound-absorbing surface. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention relates to a discontinuously operated desublimator (1) for removing at least one gas component to be desublimated from a gas mixture stream, the desublimator comprises a housing wall (7), an inlet (2) in the housing wall (7) for supplying the gas mixture stream to the desublimator (1), an outlet (6) in the housing wall (7) for removing the treated gas mixture stream from the desublimator (1), a desublimation zone (4) having a temperature controllable flow channel wall, a gas inlet distributor space (3) between the inlet (2) and the desublimation zone (4) and a gas outlet space (5) between the outlet (6) and the desublimation zone (4), in which the temperature of the flow channel walls is controllable such that the at least one gas component to be desublimated desublimates at the flow channel walls during the loading process, and such that, during a subsequent melting process, the at least one gas component desublimated during the loading process melts at the flow channel walls. According to the invention, at least a first perforated plate (8) is arranged in the gas inlet distributor space (3) for uniformly distributing the gas mixture flow through flow channels created by flow channel walls of the desublimation zone (4), the distance (AT) of the geometric centre of gravity of said plate from the desublimation zone (4) is in the range of 0 to Amax, preferably in the range of 0 to 0.5 Amax, and more preferably in the range of 0.03 to 0.3 Amax, where Amax corresponds to the distance between the inlet face (9) of the inlet (2) and the desublimation zone (4), and where the porosity of the at least first perforated plate is in the range of 5% to 50%, preferably 10% to 30%, more preferably 10% to 20%. The invention further provides a method of operating a desublimator (1) of the invention.

The objective of this invention is to reduce the burden of sieving light-density materials discharged from a density-differential sorting machine. [Solution] The sieving and recovery set according to the present invention comprises a sieving member 100 and a recovery member 200. The sieving member is attached to the discharge port EX of the low specific gravity material in the specific gravity difference sorting machine SGD. The recovery member is positioned below the sieving member to receive the low specific gravity material discharged from the discharge port. The sieving member has a perforated plate 120 and a mounting portion 110. The perforated plate is inclined downward as it approaches the recovery member. The mounting portion attaches the perforated plate to the aforementioned discharge port. The recovery member has a first recovery container CNu, a second recovery container CNl, and a non-perforated plate 220. The first recovery container is positioned below the lower end of the perforated plate. The second recovery container is positioned below the first recovery container. The non-perforated plate is inclined downward from a position below the upper end of the perforated plate towards the second recovery container and extends to the second recovery container.

1. Name of the product in this design: Perforated plate (Y01). 2. Purpose of this design: For use on interior walls, serving as an environmentally friendly, moisture-proof, fire-resistant, and sound-absorbing surface. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model discloses a corrosion-resistant building curtain wall perforated plate, which relates to the technical field of building curtain walls and comprises a building curtain wall perforated plate mechanism, a fixing mechanism is arranged on one side of the building curtain wall perforated plate mechanism, and the building curtain wall perforated plate mechanism comprises a plate. The bottom layer coating, the middle layer coating and the surface layer coating are arranged on the surface of the plate, the bottom layer coating adopts epoxy zinc-rich primer, the content of zinc powder is high, cathode protection can be provided for a base body, under the condition that the plate is scratched and other local damage conditions, the zinc powder is corroded preferentially, rusting of the base layer is delayed, the middle layer coating is the polyurethane coating, and the surface layer coating is not prone to corrosion. The coating has good flexibility and filling property, can fill up fine defects on the surface of the plate, and has good adhesive force with the bottom coating and the surface coating, the surface coating adopts the fluorocarbon coating, and fluorocarbon resin has low surface energy and high weather resistance, can effectively resist erosion of ultraviolet rays, acid rain, salt mist and the like, is more corrosion-resistant, and prevents the surface of the perforated plate from rusting.

The purpose of the present invention is to propose a granular material drying device with which uniform drying is possible, in which adhesion to a perforated plate, which is a turning mechanism, does not readily occur, and for which a compact device design is possible. This granular material drying device comprises a cylindrical container, a granular material and heated gas introduction pipe, a perforated plate that forms a swirling updraft inside the cylindrical container, and a granular material and heated gas discharge pipe. The granular material drying device is provided with a granular material circulation path 15 in which one opening end 15a opens at a portion below the portion of connection of the granular material and heated gas discharge pipe and along an inner peripheral wall surface of the cylindrical container, and the other opening end 15b opens near the center of the perforated plate that forms the swirling updraft inside the cylindrical container.

The invention discloses an active acoustic metamaterial. The active acoustic metamaterial is composed of a plurality of acoustic barrier units, each acoustic barrier unit comprises a plurality of functional surfaces, and a polyhedron is defined by the functional surfaces; and the plurality of functional surfaces comprise a transparent glass surface, a transparent micro-perforated plate surface and a film acoustic metamaterial surface. The transparent glass surface, the transparent micro-perforated plate surface and the film acoustic metamaterial surface are combined to form a polyhedron, the polyhedron can be used as a basic unit of an acoustic barrier, and the basic unit integrates multiple functions of light transmission, passive sound absorption, active sound absorption, shading and the like. When a plurality of basic units are combined together to be used for the acoustic barrier, on-demand configuration of barrier performance can be achieved, and adaptability and application value of products are improved.

Provided are a driver unit of a headphone, in which, in a case where a driver unit including a piezoelectric film having a formed curved portion is applied to the headphone, deformation of the curved portion of the piezoelectric film in a case of wearing the headphone can be suppressed, and deterioration in sound quality can be suppressed; and a headphone. The driver unit includes a piezoelectric film which has a piezoelectric layer consisting of a polymer-based piezoelectric composite material containing piezoelectric particles in a matrix containing a polymer material and electrode layers provided on both surfaces of the piezoelectric layer, and a perforated plate having at least one through-hole, in which the piezoelectric film has a curved portion which is formed to protrude to one main surface side and to be recessed to the other main surface side, the perforated plate is laminated on a concave surface side of the curved portion of the piezoelectric film, and in the through-hole, a first air chamber defined by the concave surface of the piezoelectric film and the perforated plate communicates with an outside.

A CO2 separation chamber (14), in particular a sorption chamber (14) and / or desorption chamber (18), is proposed for a CO2 separation device for separating CO2 from a supplied gas stream (12), in particular an air stream (12) from an environment, wherein two opposing wall sections (28, 32) of a chamber housing (26) each have a grid (36), in particular an expanded metal grid (36), and / or a perforated plate, in particular a perforated perforated plate, for housing stabilization and a film (38) and / or a cloth arranged on this / this for housing sealing or consist thereof.

The application provides an acoustic liner, a power propulsion system and a design method thereof. The acoustic liner comprises a perforated panel, a cavity structure and a back plate. The perforated panel is provided with through holes; the cavity structure comprises a plurality of pipes; the perforated panel and the back plate are respectively connected to opposite sides of the cavity structure, so that the perforated panel, the cavity structure and the back plate jointly enclose a plurality of cavities which are open at the top and closed at the bottom; the perforated panel comprises a panel body and a plurality of thickening portions, the thickening portions correspondingly extend to the interiors of the plurality of pipes from the panel body along the thickness direction, and the thickening portions are attached to the pipes, so that the depth of the cavity is defined by the thickening portions and the back plate; and the part of the perforated panel, the pipe and the part of the back plate which jointly enclose a single cavity provide a single sound absorption structure unit, and the thicknesses of the thickening portions of at least two sound absorption structure units are different.

The invention relates to a rainfall system comprising: - a reservoir (4) having four lateral walls, - a perforated plate arranged under the reservoir, the perforated plate having regularly spaced perforations, - a receptacle (8) arranged below the perforated plate; characterized in that it comprises two butterfly flaps (40, 42) carried by two opposite lateral walls of the receptacle, each butterfly flap being pivotally mounted about an axis relative to the receptacle between a position in which the perforations are closed and a position in which the perforations are open; in the closed position, the two butterfly flaps are arranged in the same horizontal plane and close the perforations of the perforated plate; in the open position, each butterfly flap extends along a lateral wall of the receptacle. Figure to be published with the abbreviation: Figure 3

The utility model relates to a commercial comprehensive external facade breathing lamp structure. The technical problem that an existing market lamp box is low in design and replacement efficiency is solved. Comprising a plurality of back plates arranged on the outer side of a wall through a back plate frame, a plurality of outer vertical face glass is arranged on the sides, away from the wall, of the back plates through glass frames, a vertically-arranged strip-shaped gap is formed between every two adjacent back plates, at least one strip-shaped lamp box is arranged in each strip-shaped gap, and breathing lamp strips are arranged in the strip-shaped lamp boxes. A strip-shaped opening which corresponds to the breathing lamp strip and extends in the axial direction of the strip-shaped lamp box is formed in one side of the strip-shaped lamp box, a perforated plate face capable of closing the strip-shaped opening is arranged in the strip-shaped opening through a detachable installation structure, and the perforated plate face corresponds to the strip-shaped gap and is provided with a plurality of light holes. The detachable mounting structure has the advantages that the perforated plate surface can be conveniently replaced, and the efficiency of replacing the display effect can be improved. The partition plate can separate the breathing light bar from the wire, the breathing light bar can be conveniently assembled and disassembled, and the assembling and disassembling efficiency is improved.