70 results about "Perforation plate" patented technology

The present invention discloses a whipstock assembly for use in forming a lateral borehole from a parent wellbore. The whipstock assembly comprises a body and a deflection member above the body. The deflection member includes a concave portion for deflecting a milling bit during a milling operation. Disposed on a perforation plate portion of the concave portion is a raised surface feature. The raised surface supports a milling bit above the perforation plate portion during a milling operation. This, in turn, substantially prevents frictional contact between the milling bits and the perforation plate portion during a milling operation. The present invention also provides a novel method for manufacturing a whipstock in which a cavity portion is formed behind the perforation plate by milling out the backside of the deflection member and then joining a second back cover member to the whipstock body to complete the assembly.

The invention relates to a composite resonance sound absorption device of a tube bundle perforated plate, comprising a sealed cavity composed of a perforated plate, a back plate and a lateral plate; the perforated plate is penetrated with superfine seams and voids; a tube bundle is formed by arraying N pieces of tubes which are placed in the sealed cavity, and one end of each tube penetrates intothe perforated plate or is inserted into the perforated plate by a transient joint to be connected with the perforated plate, and the other end thereof is an open or sealed end; the diameter of the tube is equal to that of the void; the external surface of the perforated plate is coated with a layer of porous sound absorption material; and N is less than or equal to the number of 6 of the voids. The invention combines the resonance sound absorption structure, superfine seam sound absorption structure and porous sound absorption material of the tube bundle perforated plate, uses the sound absorption theory of dissipating and absorbing through tube cavity coupling resonance and superfine seam resonance as well as porous sound absorption material to add acoustic resistance, intensify sound absorption, increase sound quality, lead the resonance absorption peak to move to low frequency, expand sound absorption frequency band, enhance sound absorption coefficient and realize the aim of broadband sound absorption.

The invention relates to the sound absorption technical field, particularly to a composite sound absorption structure. A sound absorption plate of the composite sound absorption structure comprises a micro perforation plate and a plate base body; the micro perforation plate is provided with a plurality of through sound absorption holes; the plate base body is provided with a plurality of sound absorption empty chambers; a communication channel is formed between every two adjacent sound absorption empty chambers; the surface of the plate base body, which is provided with the sound absorption empty chambers, is attached to the micro perforation plate; every sound absorption hole formed in the micro perforation plate is communicated with the corresponding sound absorption empty chamber formed in the plate base body; an empty chamber is formed between a structural base body of the composite sound absorption structure and the plate base body of the sound absorption plate. Compared with the prior art, the micro perforation plate, the sound absorption empty chambers and the communication channel formed between every two adjacent sound absorption empty chambers can effectively participate in energy consumption and sound absorption, meanwhile the resonance effect is achieved through the empty chamber formed between the composite sound absorption plate and the structural base body, and accordingly the sound absorption effect of the composite sound absorption structure can be particularly significant and meanwhile the sound absorption structure can be separately and independently machined, the manufacturability is good, and the production cost can be controlled.

The invention relates to a cooling device which comprises a pressure cavity cover piece, a perforation plate and a microchannel matrix plate in sequential sealed connection through waterproof silica gel. A first liquid collection cavity and a second liquid collection cavity are symmetrically formed on one side, connected with the perforation plate, of the microchannel matrix plate and communicated through a plurality of microchannels, and one side, connected with the pressure cavity cover piece, of the perforation plate inwards concaves to form a cavity which is sealed through the pressure cavity cover piece to form a pressure cavity; multiple perforation holes communicated with the microchannels penetrate the bottom of the pressure cavity, the perforation plate is provided with a first liquid outlet and a second liquid outlet on two sides of the cavity, and a liquid inlet communicated with the pressure cavity is formed in the middle of the pressure cavity cover piece. Cooling is realized by means of combining jet flow impact with the microchannels, so that the characteristic that the microchannels are large in heat exchange area can be utilized, the characteristic that jet flow impact is high in local heat exchange efficiency can be utilized, the problem of nonuniform cooling is solved, and heat exchange efficiency of the whole device is improved.

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

The invention relates to the sound absorption technical field, particularly to a composite sound absorption plate. The composite sound absorption plate comprises a micro perforation plate and a base body which are arranged in an attached mode; the micro perforation plate is provided with a plurality of through sound absorption holes; the base body is provided with a plurality of sound absorption empty chambers; a communication channel is formed between every two adjacent sound absorption empty chambers; the surface of the base body, which is provided with the sound absorption empty chambers, is attached to the micro perforation plate; every sound absorption hole formed in the micro perforation plate is communicated with the corresponding sound absorption empty chamber formed in the base body. Compared with the prior art, the micro perforation plate, the sound absorption empty chambers and the communication channel formed between every two adjacent sound absorption empty chambers can effectively participate in energy consumption and sound absorption, the energy consumption effect is achieved through the resonance sound absorption principle of the micro perforation plate and the sound absorption empty chambers, and accordingly the sound absorption effect of the structure can be particularly significant and meanwhile the sound absorption structure is located on the base body and the micro perforation plate and accordingly the separated independent machining can be performed, the manufacturability is good, and the production cost can be controlled.

The invention discloses a noise control method of a wideband composite sound absorption structure-based steam turbine generator unit and relates to a noise control method. The method comprises the following steps of analyzing noise: evaluating the near-field noise of a steam turbine unit by the noise level which is 1 meter from the unit; calculating theory of a composite sound absorption structure: calculating a perforation plate sound absorption coefficient; optimizing the composite sound absorption structure: combining different sound absorption structures through calculation, wherein the sound absorption structures are combined in two ways of combining dual-layer perforation plates, and combining the perforation plates and porous sound absorption materials. According to the method provided by the invention, a noise source a field and a propagation path on site are detected and analyzed, so that the noise reducing effect is obvious, the requirement of national technological standard can be met, and reference is provided to noise treatment of other steam turbine units. The method is particularly suitable for controlling noise of large equipment, such as a steam turbine, a wind power machine and a blower.

The invention relates to an enhanced phosphorous undercurrent removing artificial wetland for treating high-phosphorus sewage, which comprises a bed body, a mixed packing layer, a mixed soil layer, a water distribution tank, a water inlet perforation plate, a water outlet perforation plate and a water collecting basin. When the artificial wetland is in work, the sewage enters the water distribution tank and flows into the mixed packing layer through the water inlet perforation plate, then the sewage soaks towards the mixed soil layer slowly, and under the adsorption sedimentation actions of the packing layer and the soil layer and through microbial metabolism, the pollutants such as organic substances, nitrogen and phosphorus and the like in the sewage are removed. Simultaneously, aquatic plants can absorb part of the nitrogen and the phosphorus as nutrition substances supplied to per se metabolism so that advanced treatment is performed on the sewage. The artificial land has the characteristics of simplicity, practicability, high hydraulic load, good nitrogen and phosphorus treatment effect, stable performance, low running cost and the like.

The invention relates to a sound absorption composite structural material and a preparation method thereof. The material comprises the components of a chlorinated polyethylene / seven-hole hollow polyester staple fiber composite material and a perforation plate, wherein the mass ratio of chlorinated polyethylene to a seven-hole hollow polyester staple fiber is 4 to 1. The preparation method comprises the following steps of: (1) perforating stainless steel according to a triangular distribution mode, cleaning the surface of the stainless steel, and thus obtaining the perforation plate; and (2) flatly coating an adhesive on the surface of the chlorinated polyethylene / seven-hole hollow polyester staple fiber composite material, and thus obtaining the material. The sound absorption composite structural material can effectively absorb sound energy, and two different sound absorption mechanisms of a porous material and film resonance vibration can be fully used for expanding a sound absorption effect field in a cooperation way along with the increase of the number of structural layers; and the material is easy to prepare, and the material and the preparation method are suitable for industrial production.

The invention discloses a soundproof cover of a compressor, the compressor and an air conditioner outdoor unit. The soundproof cover of the compressor comprises a perforation board and a soundproof plate, wherein a porous sound absorbing layer is arranged between the perforation board and the soundproof plate; the porous sound absorbing layer is 5-60mm thick, and the soundproof plate is 1-2mm thick. The soundproof cover of the compressor disclosed by the invention has an excellent sound isolating and absorbing effect, can absorb wide frequency noise radiated by the compressor, reduces the integral OA value, also can absorb noises at a special fundamental frequency and the frequency doubling noises thereof, and reduces the frequency doubling noise peak of the compressor. The sound waves offrequency bands sent by the compressor firstly arrive the perforation plate, enter the porous soundproof layer through the perforation board and reflect back and forth between the perforation board and the soundproof plate. The soundproof layer is holes penetrating one another inside and is subjected to air molecular friction and viscous resistance. The sound energy is converted into heat energy through inner friction of air molecules and mechanical vibration of fine fibers, so that the purposes of absorbing sounds and reducing noises are achieved.

The invention relates to a flocculation-precipitation integrated reactor for water treatment, belonging to the technical field of water treatment. The flocculation-precipitation integrated reactor for water treatment comprises an outer tube, an inner tube, a water distributor and a perforation plate, wherein the bottom of the outer tube is funnel-shaped, a precipitate outlet is formed in the bottom of the outer tube, a water outlet of the integrated reactor is formed in the tube wall of the upper part of the outer tube, the inner tube is arranged in the outer tube, the top of the inner tube is fixed on a cover of the outer tube, the water distributor is arranged on the upper part of the inner tube, and a backwashing water outlet is formed in the cover on the top of the inner tube. The perforation plates are fixed in the inner tube in parallel, the bottom of the inner tube is funnel-shaped, a precipitate outlet is formed in the bottom of the inner tube and connected with a backwashing valve and a sludge discharge valve. Aeration heads are arranged on the lower parts of a plurality of perforation plates in the inner tube, and perforations are formed in the inner tube wall on the upper parts of the aeration heads. The integrated reactor integrates flocculation and precipitation, so that the occupation area for water treatment can be reduced, the energy consumption of the water treatment can be decreased, the water treatment cost can be lowered, and the flocculation-precipitation integrated reactor has wide application prospects and is especially applicable to wide remote rural areas.

A perforated plate for use in a wafer-handling chuck has a pattern of through holes by which a vacuum is applied to a membrane to form suctions cups that secure a wafer to the chuck. Grooves in a generally planar upper surface of the plate interconnect the through holes. The grooves ensure the maintenance of the vacuum, and the consequent formation of the membrane suction cups, at each through hole, even when the grooved surface of the plate is in close face-to-face contact with another planar surface in the chuck. In one embodiment, the through holes in the perforated plate lie on concentric circles and the grooves interconnect radially-outward through holes to the next closest one or pair or radially-inward through holes.

The invention discloses an H-shaped steel-support welding reinforcing device.The H-shaped steel-support welding reinforcing device comprises an H-shaped steel support, a plurality of reinforcing rib plates, external constraint parts, liming blocks and perforation plates.The H-shaped steel support is connected with a frame structure through joint plates.The multiple reinforcing rib plates are arranged at the two ends of a web of H-shaped steel respectively.As the external constraint parts are arranged on the existing H-shaped steel support, and the relative positions between the parts are fixed through the limiting blocks and the perforation plates, flexural rigidity is provided for the support, and bending of the support is limited.According to the H-shaped steel-support welding reinforcing device, the reinforcing rib plates and the external constraint parts are arranged to reinforce the connecting joints of the welded H-shaped steel support, the carrying capacity of the support is improved, the connecting fastness between the reinforcing device and the building frame is improved, and therefore the shock resistance of the whole structure is improved.

The invention discloses a design method, structure and application of a perforated sound absorber inside a waste heat boiler. The perforated sound absorber comprises two perforated plates 1 and a liner plate 2. The two perforated plates 1 are attached to the two sides of the liner plate 2 respectively; the two sides, tightly attached to the perforated plates 1, of the linear plate 2 are respectively of a groove type structure, so that sound absorption cavities 3 are formed between the perforated plates 1 and the linear plate 2; liner pipes 4 are arranged in holes in the perforated plates 1. According to the perforated sound absorber inside the waste heat boiler, the perforated plates are provided with the liner pipes and the small holes, the problem that a traditional multi-hole sound absorber material is prone to blocking is effectively solved, the resonance absorber is formed by the sound absorption cavities formed by the perforated plates and the linear plate, noise produced inside the waste heat boiler can be effectively absorbed, and a part of the noise can be reflected to a noise source.

The invention discloses a toilet paper perforation device which comprises a stand, wherein a roller, a driving wheel and a driven wheel are mounted on the stand; a belt is tensioned between the driving wheel and the driven wheel; an adsorption hole is formed in the belt; a first eccentric rod and a second eccentric rod are hinged to the driving wheel; the first eccentric rod is connected with a sliding block; the sliding block is connected with a supporting rod; the supporting rod is connected with a first cavity; a piston block is arranged in the first cavity in a sliding manner; the piston block is connected with a piston rod; the piston rod penetrates through the first cavity; the piston rod is connected with the sliding block; the first cavity communicates with the adsorption hole; the second eccentric rod is connected with a fan gear; the fan gear meshes with a rack; a spring is connected between the rack and the stand; a perforation plate is connected to the rack; an annular blade is arranged on the perforation plate; and a first limiting roller and a second limiting roller are arranged on the outer side of the belt. Compared with the prior art, the toilet paper perforation device avoids the phenomenon of breakage during perforation of rice paper, and improves the softness of toilet paper with the rice paper serving as an interlayer.

The invention discloses a device and a method for treating wastewater with high content of salt and organic compounds by using an electromagnetic technique. Multiple stages of electromagnetic pole perforation plates are arranged in the device, wherein each electromagnetic pole perforation plate is formed by a plurality of electromagnetic units and magnetic water flow gaps through an alternate arrangement manner; two adjacent electromagnetic pole perforation plates and a magnetic water reaction area between the two electromagnetic pole perforation plates form a magnetic water reaction unit; the wastewater enters a water inlet area of the device through a water inlet pipe, passes through the magnetic water flow gaps from the water inlet area and enters the magnetic water reaction areas, so that the organic compounds in the wastewater can be rapidly degraded; after the wastewater is subjected to multi-stage magnetic water reaction, the wastewater enters a water outlet area and is discharged out of the device; ultrasonic generators are arranged at the bottom of the device, so that the degradation efficiency of the organic compounds is improved; aeration vent pipes are arranged at the upper ends of the ultrasonic generators; gases such as oxygen, ozone, nitrogen and the like can be introduced for carrying out collaborative electromagnetic treatment according to the water quality conditions of the inlet water. The device and the method have excellent effects on treating the wastewater with high content of salt and non-degradable organic compounds; the difficulty of subsequent treatment process can be reduced; the treatment cost can be reduced.

The invention relates to a sound absorption wall and a mounting method thereof. The sound absorption wall comprises a grid framework, sound absorption cotton, perforation plates and mounting sectionalmaterials. The sound absorption cotton is arranged in grids of the grid framework to form an inner wall, the mounting sectional materials are fixed to the two faces of the grid framework, the perforation plates are arranged on the front and rear portions of the inner wall, the back faces of the perforation plates and the front faces of the mounting sectional materials are provided with insertionstructures which are matched with one another, in this way, the perforation plates and the mounting sectional materials are fixed, the perforation plates cover the inner wall to form an outer wall, and a cavity is formed between the inner wall and the outer wall. The mounting method comprises the steps that the grid framework is fixed to an original wall of a house; the sound absorption cotton isplaced in the grids to form the inner wall; the mounting sectional materials are installed on the two faces of the grid framework; and the perforation plates are fixedly inserted in the mounting sectional materials through the insertion structures and close the inner wall to form the outer wall, and the cavity is formed between the inner wall and the outer wall. The sound absorption wall has a great sound absorption effect. The sound absorption wall is easy to operate and convenient to construct, the construction efficiency is greatly improved, and the cost is lowered.

The invention provides a membrane type acoustic metamaterial sound absorption and insulation device with a perforated plate, which is characterized in that four cavity walls of the sound absorption and insulation device enclose a frame wall with a square section, the perforated plate is arranged behind the frame wall, a perforated frame is arranged in front of the frame wall, a cavity is formed inthe middle of the frame wall, a film is fixed in the perforated frame, a mass block is adhered to the center of the film, and the film is circular, and the mass block is of a solid cylindrical structure. The membrane type acoustic metamaterial sound absorption and insulation device with the perforated plate solves the problem that an existing membrane type acoustic metamaterial is limited in sound wave effect on a medium frequency band, solves the problem that a single perforated plate or a single membrane type acoustic metamaterial is narrow in sound absorption frequency band, is suitable for being used in a wide frequency band range, and is applied to sound absorption and insulation design of ships and other fields. The living environment of people is improved, and the engineering application prospect is good.

The invention discloses a space bending low-frequency sound absorption superstructure based on a grooving type corrugated layer core, and belongs to the field of composite acoustic meta-materials. The superstructure comprises a perforated plate, a grooving type corrugated layer core, a lower panel, a left inclined frame plate, a right inclined frame plate, a front frame plate and a rear frame plate. On one hand, the sound absorption structure is evolved into a perforated sound absorber with a cavity by forming submillimeter-level to millimeter-level holes in a penetrating mode. On the other hand, the corrugated layer core with a bearing function is introduced into the cavity, and double-side staggered grooving is ingeniously performed on the corrugated layer core, so that the back cavity is of a space coiling structure, and the low-frequency noise absorption performance of the sound absorber can be greatly enhanced without increasing the total thickness. The structure is simple and practical, has good medium-low frequency band sound absorption performance and independent bearing capacity, and has a good and wide application prospect.

The invention relates to a device for separating mobile cells, formed by two reservoirs that share a side formed by a perforated plate in which at least one channel has a narrowed diameter, adopting aconical shape. A sample containing the cells is deposited in the first reservoir and the second reservoir is filled with a culture medium, with a level mark higher than that of the first reservoir, producing a current towards same. The device is used to select, in a semen sample, the most suitable spermatozoa for use in assisted reproduction techniques.

The invention relates to ventilation devices, in particular to a ventilation device capable of lowering noise. The ventilation device capable of lowering noise aims at solving the problem that when an existing ventilation device is used for ventilating a room, noise pollution is brought into the room due to the fact that outdoor noise is introduced into the room. The ventilation device comprises an outer support plate, a first micro-perforation plate, a second micro-perforation plate and an inner support plate. The outer support plate is a circular arc plate. The outer support plate and the inner support plate are vertically arranged. The first micro-perforation plate and the second micro-perforation plate are vertically arranged between the outer support plate and the inner support plate. A first cavity is formed by the outer support plate and the first micro-perforation plate. A second cavity is formed by the inner support plate and the second micro-perforation plate. A ventilation passage is formed by the first micro-perforation plate and the second micro-perforation plate. The ventilation device capable of lowering noise is applied to the building field.

The acoustic metamaterial cell comprises a first acoustic cell, a second acoustic cell and a main ventilating duct, the first acoustic cell and the second acoustic cell are both of an annular cavity structure, the main ventilating duct is a center channel of the first acoustic cell and the second acoustic cell, the main ventilating duct, the first acoustic cell and the second acoustic cell are coaxially arranged, and the first acoustic cell and the second acoustic cell are communicated through the main ventilating duct. The main ventilating duct is communicated with the first acoustic cavity of the first acoustic cell through the acoustic opening in the first acoustic cell, the main ventilating duct is communicated with the second acoustic cavity of the second acoustic cell through the perforated plate on the second acoustic cell, and the second acoustic cavity is filled with a high-porosity energy-absorbing medium. Sound waves enter from an acoustic opening between the main ventilating duct and the first acoustic cavity and form a resonant cavity with the first acoustic cavity; sound waves enter from the perforated plate between the main ventilating duct and the second acoustic cavity and form a sound absorption cavity with the high-porosity energy absorption medium in the second acoustic cavity. The acoustic metamaterial cell has excellent noise elimination performance of low frequency, broadband and small size.

The invention relates to a rain water seepage well lid for an urban green land, which comprises a well frame and a well lid. The rail water seepage well lid is characterized in that the well lid adopts a cone frustum type recess; a perforation plate card is arranged in the cone frustum type recess; a perforation plate is lapped on the perforation plate card to divide the well lid into an upper layer and a lower layer; the upper layer adopts a vegetation planting layer; and the lower layer adopts a water storage layer; the outer edge of the well lid is lapped on circular grids of the well frame; the well frame consists of a circular ring, a soil retaining ring and the circular grids; the soil retaining ring is arranged above the well frame; the diameter of the soil retaining ring is equal to the outer diameter of the circular ring; and the circular grids are vertically mounted on the edge of the inner diameter of the circular ring. The upper layer of the well lid adopts the vegetation planting layer; redundant rain water collected by the well lid when rain falls can be stored in the water storage layer, and is used for the growth of vegetation in a lid plate in the non-rain falling period. And the well lid can improve the overall aesthetics of the green land under the condition of not influencing water entrance.