54 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 utility model discloses a noise reduction structure and a range hood, and belongs to the technical field of kitchen appliances. The noise reduction structure comprises a perforated plate, a sound absorption cavity and a sound absorption layer, the side, close to the air channel, of the perforated plate serves as a sound wave incident face, the sound absorption layer is connected with the perforated plate, the perforated plate is used for reducing incident high-frequency sound wave energy, the sound absorption cavity is used for reducing incident low-frequency sound wave energy, and the sound absorption layer is used for reducing incident medium-high-frequency sound wave energy. Compared with the prior art, the composite noise reduction structure in the sandwich form is additionally provided with the sound absorption cavity, low-frequency noise reduction can be achieved, the low and medium frequency noise reduction effect of the noise reduction structure is improved, and therefore the use experience feeling of a user is effectively improved. The range hood disclosed by the utility model comprises a main case and the noise reduction structures, and the noise reduction structures are arranged on the two sides of the main case. According to the range hood, low-frequency noise attenuation is achieved, and the use experience feeling of a user is effectively 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.

The invention relates to a holding device, a perforated plate, and a mounting wall. The holding device is designed to hold an object at a hole, in particular at a hole in a perforated plate, and comprises a holding element (3a) for receiving the object to be held. In order to enable a particularly stable hold and also flexible adaptation to different tools, the holding element (3a) has at least one recess, the holding device comprises at least one separate fixing element (9b; 9c), and the fixing element (9b; 9c) has a projection which is designed to protrude into the recess to hold the object.

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

The invention discloses a standard silencer structure and a rapid building method of a silencing performance database of the standard silencer structure, the structure is composed of an upper shell, a lower shell, an inner core framework and a perforated plate, and the inner core framework, the upper shell, the lower shell and the perforated plate are mutually clamped to form a main pipeline and a silencing cavity. Compared with the prior art, according to the scheme, the upper shell, the lower shell, the inner core framework and the perforated plate of the structure are repeatedly used, the silencing characteristics of many silencers can be obtained through measurement of few real objects, operation is easy, the sample piece utilization rate is high, and the silencing performance database of the standard silencer built through the method has the advantages of being high in practicability and the like. A traditional theoretical formula can be replaced in the development of the broadband silencer, the scheme design of the silencer is guided, and a design scheme meeting a performance target can be obtained only by tuning for several times; reference can be provided for sample piece modification in later-stage real vehicle tuning, the number of trial and error times is reduced, the development period is shortened, and the development cost is saved.

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 present invention discloses a perforated plate processing and merging method based on a coordinate system. The present invention includes the following steps: S1, creating a skin model and a grid model according to architectural design requirements; S2, dividing plates and performing standardization processing on the divided plate models; S3, placing the sheet materials on the world coordinate system according to types and creating feature data based on the world coordinate system; S4, performing merging processing on the feature data of all plates according to a set allowable error; S5, processing the merged feature data to obtain ID feature data; S6, distinguishing plates according to the ID feature data and numbering them; S7, regenerating plates according to the ID feature data and returning the regenerated plates to the skin model for inspection. The present invention uses the coordinate system method to perform merging calculations on tens of thousands of perforated plates, minimizing the types of plates as much as possible, so as to achieve the purpose of reducing the plate generation cost, construction difficulty, and shortening the production cycle.

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 utility model relates to an anti-resistance silencer applied to a special fan for moxibustion therapy, which comprises a shell and a connecting part, one end of the connecting part is connected with an air outlet of the fan, the other end of the connecting part is connected with an air inlet of a purifier, the connecting part is arranged on the circumference of the center of the shell, the surface of the shell is coated with a damping coating layer, and the damping coating layer is arranged on the periphery of the shell. A glass steel plate is compounded on the inner wall of the shell, a first glass cloth layer is compounded on the inner wall of the glass steel plate, a sound absorption cotton layer is compounded on the first glass cloth layer, a second glass cloth layer is compounded on the inner wall of the sound absorption cotton layer, and a perforated plate is compounded on the second glass cloth layer. According to the utility model, not only can the problems that the fan generates noise which can influence rest of other patients and normal work of medical staff be solved, but also the exhaust pressure of smoke in the pipeline is not increased, and the operation efficiency of the whole equipment is improved.

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 utility model relates to a three-dimensional building facade perforated plate which comprises a base plate, a plurality of holes are formed in the base plate, and a folded edge is arranged on the light facing face of the base plate and located on the periphery of each hole. A glass curtain wall comprises hollow glass and a three-dimensional building facade perforated plate, the hollow glass is fixed on a framework, the perforated plate is arranged on the facade of the hollow glass, and the perforated plate is connected with the framework through a keel and a U-shaped adapter. The perforated plate has the advantages that the folded edges are designed on the periphery of each hole in the light facing face of the base plate, so that the perforated plate is possible to be in an arc shape, the perforated plate forms a three-dimensional space effect, the perforated plate has the outer vertical face decoration and sun-shading functions, and the higher sun-shading rate can be achieved under the vertical face design requirement for the large perforation rate; the sunshade form can be changed according to different orientations of the perforated plate, and the effect of the outer vertical face is not affected; besides sunshade, reflected light can be organized to increase the indoor indirect lighting effect.

The present invention discloses a ventilation silencer based on a perforated plate, which relates to the field of noise control and solves the problem that the existing ventilation perforated plate silencer has a high sound absorption peak frequency, a low sound absorption coefficient, a narrow bandwidth, and affects ventilation. The present invention includes a plurality of back cavities, a plurality of baffles, a plurality of micro-perforated plates, and a folded channel, wherein the baffles include an upper baffle, a plurality of lower baffles, and a plurality of side baffles; a plurality of micro-perforated plates, an upper baffle, and a plurality of lower baffles are vertically installed at both ends of a plurality of side baffles to form a back cavity; a plurality of back cavities are arranged in an enclosed manner, and the enclosed central area is a ventilation channel, wherein two back cavities are connected by a folded channel. The present invention can produce a sound absorption effect on medium and low frequency sound waves through the cooperation of the back cavity and the micro-perforated plate under the condition of maintaining ventilation, has good sound absorption performance, and has a good sound absorption bandwidth, and can use any rigid material to achieve an ideal sound absorption effect.

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 utility model belongs to the technical field of curtain wall hooking devices, and particularly relates to a perforated plate mounting structure with auxiliary frames, which comprises a keel, two auxiliary frames are respectively fixed on two sides of the lower end of the keel, the two auxiliary frames are symmetrically arranged, and a pressing piece arranged between the two auxiliary frames is arranged on the keel through a fastener. A decorative cover plate is installed on the pressing piece, and a perforated plate is arranged on the inner side of the auxiliary frame through a fixing piece. The utility model has the beneficial effects that the perforated plate and the auxiliary frame are assembled in a factory, so that the assembled frame of the auxiliary frame can be mounted on the keel through the full-length pressing strip by ensuring that the corners are flush through the corner assembly corner connector, and the edge of the perforated plate is uniformly stressed, so that the perforated plate can be prevented from being deformed, and the service life of the perforated plate is prolonged. The edge of the perforated plate and a gap between the perforated plate and the pressing plate are sealed through sealant, so that durability and reliability of internal connecting pieces can be guaranteed, the decorative cover plate can shield installed fasteners, and the appearance effect is guaranteed.

The utility model relates to an acoustic sound insulation space with an effect of improving internal sound quality. The acoustic space is provided with an inner bottom, an inner top, a first inner wall, a second inner wall, a third inner wall and a fourth inner wall, gRG plates are installed on the first inner wall, the second inner wall, the third inner wall and the fourth inner wall respectively, and the GRG plates installed on the second inner wall and the fourth inner wall are corrugated surface GRG plates; the GRG plates installed on the first inner wall and the third inner wall are plane GRG plates, GRG perforated plates are further arranged in the middles of the first inner wall and the third inner wall in the height direction, the plane GRG plates are arranged at the upper positions and the lower positions of the GRG perforated plates respectively, and centrifugal glass wool is arranged on the back faces of the GRG perforated plates. And a GRG suspended ceiling is arranged below the inner ceiling. According to the utility model, on one hand, the generation of low-frequency standing waves is reduced through the arrangement of the acoustic space shape; in addition, through the arrangement of the GRG perforated plate and the centrifugal glass wool, the absorption of low-medium frequency sound is increased, the sound insulation effect is achieved, and meanwhile the problem of sound distortion in the acoustic space is solved.

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 invention relates to a discontinuously operated desublimer (1) for removal of at least one gas component to be desublimed from a gas mixture flow, comprising a housing wall (7), an inlet (2) on the housing wall (7) to supply the gas mixture flow to the desublimer (1), an outlet (6) on the housing wall (7) for removing the treated gas mixture flow from the desublimer (1), a desublimation zone (4) having temperature-controllable flow channel walls, wherein the temperature of the flow channel walls is adjustable such that, during a loading process, the at least one gas component to be desublimed is desublimed on the flow channel walls, and such that, during a subsequent melting process, the at least one gas component desublimed in the loading process melts on the flow channel walls, 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). According to the invention, at least one first perforated plate (8) disposed in the gas inlet distributor space (3) for uniform distribution of the gas mixture flow through the flow channels that arise from the flow channel walls of the desublimation zone (4) has a geometric centroid having a distance (AT) from the desublimation zone (4) in the range from 0 to Amax, preferably in the range from 0 to 0.5 * Amax and more preferably in the range from 0.03 to 0.3 * Amax, where Amax corresponds to the distance between the inlet area (9) of the inlet (2) and the desublimation zone (4), and where the at least one first perforated plate has a porosity in the range from 5% to 50%, preferably 10% to 30%, more preferably 10% to 20%. The invention further provides a method of operating a desublimer (1) of the invention.