1061 results about "Membrane surface" patented technology

The invention relates to the field of wastewater treatment, and provides an industrial wastewater membrane process intelligent optimization method and system based on multi-dimensional data modeling. The method comprises the following steps: acquiring wastewater quality parameters of a target scene and a production line equipment state in real time through a multi-dimensional sensor network, and constructing a digital twinborn model of a wastewater treatment system in the target scene; the membrane surface pollution type of each node in the wastewater treatment system is identified through a digital twin model, and the inner membrane pollution evolution condition in the future preset duration is predicted; a multi-strategy evolutionary reinforcement learning algorithm is adopted, the wastewater quality parameters, the production line equipment state and the membrane pollution prediction result are combined, multi-target dynamic optimization is conducted on a wastewater treatment system through a multi-agent collaborative decision-making algorithm, an optimization strategy is generated based on the multi-target dynamic optimization result, and membrane process operation parameters and production control parameters are dynamically adjusted. According to the method, real-time intelligent adjustment of membrane process operation can be realized, the stability of membrane process operation is guaranteed, and the treatment efficiency of membrane process operation is improved.

The invention relates to the technical field of water treatment, and provides a reverse osmosis membrane cleaning method, a cleaning agent composition and application. According to the method, whether cleaning is needed or not is determined by comparing initial operation parameters and current operation parameters of a system; the pollutant type is accurately judged by observing the appearance characteristics of the membrane surface and detecting related index parameters; and selecting a corresponding cleaning agent formula according to the pollutant type, and sequentially performing physical washing and chemical cleaning. The cleaning agent composition comprises a biological pollution cleaning agent, an organic pollution cleaning agent and / or an inorganic scaling cleaning agent. By establishing a scientific pollution diagnosis system and a targeted cleaning strategy, the problems of fixed cleaning scheme and low pertinence in the prior art are solved, the pressure difference recovery rate after cleaning can reach 90% or above, the desalination rate recovery rate can reach 99% or above, the cleaning efficiency is remarkably improved, the operation cost is reduced, and the service life of the membrane is prolonged.

The invention provides a reverse osmosis membrane cleaning system which is characterized in that a variable-frequency water pump control system is adopted to adjust water flow momentum according to cleaning parameters output by a matching algorithm, differential impact strength control of different areas on the surface of a membrane is realized through a flow adjusting valve group, and a stress distribution mode adaptive to pollution distribution is obtained; mechanical stress data of the membrane surface in the cleaning process are collected in real time through a membrane material stress monitoring sensor, if the stress value exceeds a membrane material safety threshold value, a stress protection mechanism is triggered, and the impact strength of a corresponding area is automatically reduced; establishing an adaptive parameter optimization algorithm according to pressure feedback data and a pollutant stripping effect evaluation result in the cleaning process, and calculating a parameter adjustment scheme of the next cleaning period through a tradeoff function of the cleaning effect and mechanical damage; a membrane performance degradation prediction model is established through accumulation of historical cleaning data, the remaining service life of a membrane material is predicted according to accumulated mechanical stress and cleaning frequency data, and a quantitative judgment basis of the membrane replacement opportunity is obtained.

The invention discloses a self-cleaning composite piezoelectric ceramic membrane as well as a preparation method and application thereof, and belongs to the field of composite ceramic membranes. The technical problem that an existing ceramic membrane separation technology is poor in biomembrane pollution resisting effect is solved. According to the preparation method, the barium titanate ceramic membrane is firstly prepared to serve as the base membrane, then the copper oxide one-dimensional nanostructure is loaded on the piezoelectric ceramic substrate, and the base membrane has a large membrane surface area and can be combined with more catalysts, so that more active sites are provided for catalytic reaction; according to the composite membrane, the hydrophilicity, the anti-pollution performance and the piezoelectric catalysis self-cleaning performance of the membrane are remarkably improved, and pollutants in water can be quickly and effectively separated, so that the flux and the anti-pollution performance of the membrane are improved.

The invention discloses a reverse osmosis membrane concentration polarization layer thickness prediction method and device based on electrical impedance tomography, and relates to the technical field of membrane process nondestructive monitoring, and the method comprises the following steps: constructing a simulation model based on an electrode array membrane filtration sensor; virtual media with different conductivities are arranged on the surface of the membrane, a simulation conductivity image is reconstructed through a conjugate gradient least square algorithm and a sensitivity matrix, and a neural network is improved through known conductivity training; and reconstructing an actually measured conductivity image by an actually measured boundary voltage data set, predicting a membrane surface conductivity estimated value by using the trained improved neural network, and performing concentration polarization layer thickness mapping. A conductivity image with a conductivity label is generated through numerical simulation, so that the problem that the thickness of the concentration polarization layer is difficult to calibrate is solved, then a neural network is improved through training so that the truth value of the conductivity can be predicted according to the conductivity image, and interpretable mapping of the thickness of the concentration polarization layer is carried out in combination with a membrane mass transfer theory. The thickness of the concentration polarization layer can be subjected to online lossless quantitative detection.

The invention discloses a full-automatic vehicle film laminating machine and a hot-pressing compounding process thereof, and aims to improve the production efficiency of a vehicle film and the adhesive force of a film layer. The laminating machine comprises an electrostatic spraying chamber and a hot pressing chamber, and efficient compounding of membrane materials is achieved through the synergistic effect of the electrostatic spraying chamber and the hot pressing chamber; a film material is automatically fed into a laminating machine through an upper-layer film leading-in roller and a base material film leading-in roller, after the film material enters an electrostatic spraying chamber, the surface of the film material is subjected to corona treatment, and a nano coating solution is uniformly sprayed on the surface of an upper-layer film through an atomizer; meanwhile, redundant charged particles on the surface of the substrate film are collected through an electrostatic collection plate; the sprayed membrane material enters a hot-pressing chamber, and is heated and pressurized under the action of a hot-pressing roller, so that the two layers of membranes are tightly combined, and the high bonding strength between the membrane layers is ensured; and finally, the finished product film material is wound through a finished product storage roller, and a high-quality vehicle film product is formed.

The invention relates to the field of sewage treatment, in particular to an urban sewage treatment system based on the Internet of Things. Comprising a grating tank, a desilting tank, an anoxic tank, an anaerobic tank, an aerobic tank, a sludge concentration tank and a disinfection tank which are sequentially connected, a membrane filtration unit and an aeration unit are arranged in the aerobic tank, the membrane filtration unit comprises a plurality of membrane assemblies which are distributed at equal intervals in the length direction of the aerobic tank, and each membrane assembly is provided with a flow sensor. A membrane treatment mechanism corresponding to each membrane component is arranged in the aerobic tank, each membrane treatment mechanism comprises a rotating frame and a sliding frame, and when the sliding frames slide along the sliding chutes from top to bottom, membrane surfaces with different heights are sequentially close to the aeration units to form a gradient flushing mode. The membrane flux condition of the membrane module is known through monitoring of the Internet of Things, the membrane treatment mechanism can be started in time, the membrane module slides down obliquely along with the sliding frame, the membrane surface is scoured section by section in combination with aeration, flux stability is effectively maintained, and stable operation of the sewage treatment system is ensured.

The invention discloses a modified microfiltration membrane for enriching biological particles and a preparation method and application thereof, and belongs to the technical field of biological separation.The preparation method of the modified microfiltration membrane comprises the following steps that a mixed cellulose ester microfiltration membrane is provided and subjected to alkali liquor activating treatment; placing the activated membrane in a weakly alkaline buffer solution for balancing; the preparation method comprises the following steps: in a weakly alkaline buffer solution, firstly contacting the surface of the membrane with a tannic acid solution to carry out a first reaction, and then directly adding a polyethyleneimine solution to carry out a second reaction under the condition of not replacing a system, so as to form a phenol-amine cross-linked network on the surface of the membrane in situ; sodium cyanoborohydride is continuously added for reduction stabilization treatment, and the modified microporous filter membrane is obtained. The modified microporous filter membrane prepared by modifying the microporous filter membrane with tannic acid and polyethyleneimine can realize one-step synchronous enrichment of all negatively charged targets, and the problems of target loss, efficiency loss and the like caused by a multi-step process are avoided from the source.

The invention relates to the technical field of film packaging, in particular to a high-barrier light-enzyme double-response controllable degradation three-layer composite film and a preparation method thereof.The preparation method comprises the steps that a base material layer and a functional layer are subjected to a film blowing process through a double-layer co-extrusion film blowing machine, a double-layer composite film is formed, after cooling, the surface of the double-layer composite film is coated with a barrier layer through a coating machine, and the double-layer composite film is obtained. The preparation method of the high-barrier light-enzyme double-response controllable degradation three-layer composite film provided by the invention is simple and low in cost, the high-barrier light-enzyme double-response controllable degradation three-layer composite film has high barrier property, rapid illumination and enzymolysis double-signal triggering is realized, rapid controllable degradation is realized, and the high-barrier light-enzyme double-response controllable degradation three-layer composite film has the advantages of high light-barrier property, high light-barrier property, high light-barrier property and high light-barrier property. The industrial problem that environmental protection and functionality are difficult to be compatible is solved.

The invention relates to the technical field of separation of oil-containing wastewater, and particularly discloses a nano separation membrane material for separating oil-containing wastewater as well as a preparation method and application of the nano separation membrane material aiming at the problems of limited oil-water separation flux, poor anti-pollution performance and the like of a separation membrane material for treating the oil-containing wastewater at present. The nano separation membrane material comprises a nano base membrane and polydopamine (at) ZnIn2S4-CuS anchored on the surface of the nano base membrane, and the polydopamine (at) ZnIn2S4-CuS is a gear-shaped ZnIn2S4-CuS heterojunction material bridged with dopamine. According to the nano separation membrane material, through the gear-shaped ZnIn2S4-CuS heterojunction, the ultrahigh oil-water separation flux is achieved, the photocatalysis-photothermal conversion performance is achieved through the synergistic effect of ZnIn2S4-CuS and the polydopamine layer, and a feasible separation membrane material is provided for efficient separation treatment of complex emulsified oily wastewater; and meanwhile, the synergistic effect of gear-shaped CuS and ZnIn2S4 is utilized to promote efficient transfer of photo-induced electrons, generate abundant active substances, quickly degrade organic pollutants in the oily wastewater and play an anti-pollution role.

The invention discloses an on-line detection method for surface defects of an EVA (Ethylene Vinyl Acetate) adhesive film based on machine vision, which belongs to the technical field of industrial automatic quality detection and comprises the following steps: acquiring multiband image data of the surface of the EVA adhesive film acquired by a preset multi-angle self-adaptive imaging system; performing background difference processing on the multiband image data to generate a difference image; performing adaptive contrast enhancement processing on the difference image to obtain an enhanced image; extracting texture feature data and morphological feature data from the enhanced image to generate a multi-feature data set; performing dynamic weighted fusion processing on the multi-feature data set to generate a defect probability graph; the defect probability graph is input into the layered detection network for processing, a defect detection result is generated, the technical scheme that multi-angle self-adaptive imaging, multi-feature dynamic fusion and the layered detection network are combined is adopted, the defect imaging quality and feature significance can be improved in a self-adaptive mode, and high-speed accurate detection and dynamic optimization of the surface defects of the EVA adhesive film are achieved.

The invention discloses a composite coating diaphragm and a preparation method thereof and a secondary battery, the composite coating diaphragm comprises a base membrane and a composite functional coating compounded on the surface of the base membrane, the composite functional coating comprises a first functional coating relatively close to the base membrane and a second functional coating relatively far away from the base membrane, the porosity of the first functional coating is smaller than that of the second functional coating, and the raw material components of the first functional coating comprise modified nanocellulose obtained by double-grafting cis-1, 4-polybutadiene and polyethylene glycol chain segments and gas-phase aluminum oxide. By constructing a diaphragm coating with a gradient pore structure and combining an advanced material modification technology, the composite coating diaphragm integrates high thermal stability, excellent electrolyte wettability and low-temperature adaptability, and can still keep stable structure and interface characteristics under an extreme temperature working condition; therefore, the method has good expandability and industrial application prospects, and is suitable for development and application requirements of high-performance lithium ion batteries and next-generation energy storage devices.

The invention discloses a preparation method of a piezoelectric response type hybrid ceramic membrane, which is characterized in that polyvinylidene fluoride powder is used as a base material of the membrane, propylene carbonate or ethylene carbonate is used as a diluent, negative-voltage-loaded piezoelectric ceramic modified nanoparticles are doped, and a proper amount of inorganic piezoelectric nanoparticles are doped, so that the electrical property of the pressed membrane is remarkably improved; a negative charge group introduced to the surface of the membrane through surface grafting is combined, so that the relative content of beta crystal forms of the polyvinylidene fluoride membrane is increased, and finally efficient interception and excellent anti-pollution effects on humic acid are achieved.

The invention discloses two-stage reverse osmosis water treatment equipment, and relates to the technical field of water treatment equipment, the two-stage reverse osmosis water treatment equipment comprises a shell, a flow guide net is arranged in the shell, a reverse osmosis membrane is arranged in the flow guide net, the outer side of the flow guide net is fixedly connected with a side plate, and the inner wall of the flow guide net is fixedly connected with a spiral plate. According to the two-stage reverse osmosis water treatment equipment, the spiral plate arranged on the inner side of the flow guide net can convert linear water flow into spiral rotational flow, and centrifugal force generated by the rotational flow can throw suspended particles, colloids and other impurities in water to the outer side of the flow guide net, so that the contact probability of the impurities and a reverse osmosis membrane is further reduced; meanwhile, the spiral flow channels increase the contact area and contact time of water flow and the surface of the membrane, the permeation efficiency of water molecules is improved, rigid structures of the spiral plates can play a role in supporting the flow guide nets and the reverse osmosis membrane, and side plates arranged on the outer sides of the flow guide nets can realize sealed isolation between adjacent permeation units and prevent water flow mixing among different units.

The invention discloses a membrane separation and concentration system for treating solid waste incineration fly ash, relates to the technical field of membrane separation, and aims to solve the technical problem that a concentrated solution is difficult to form a high-concentration state due to reduction of membrane flux caused by thickening of a filter cake layer. An annular filter membrane is installed on the rotating frame, a concentration chamber is formed in an inner cavity of the annular filter membrane, a supporting pipe body is arranged in the concentration chamber, a liquid inlet channel is arranged in an inner cavity of the supporting pipe body, and a plurality of gathering plates and collecting assemblies are further arranged in the concentration chamber. The device has the advantages that a stable filter cake layer formed on the surface of the membrane during static filtration is broken, membrane hole blockage caused by continuous deposition of impurities is avoided, a concentrated solution can be in full contact with a new filter hole area, which does not participate in preliminary filtration, of the annular filter membrane, the filter area of the filter membrane is utilized to the maximum extent, and the filter efficiency and the concentration multiple are improved.

The utility model provides a blood collection tube multi-label extension film which comprises a transparent base film with an adhesive layer on the bottom surface, a red emergency treatment mark is arranged at the top of the surface of the transparent base film, a non-transparent protective film covers the surface of the red emergency treatment mark, and the left side or the right side of the transparent base film is connected with an extension part. The left side or the right side of the transparent base film is detachably connected with a transparent expansion wing through an extending part, N + 1 rows of standard label positions are preset on the back face or the surface of the transparent expansion wing, N rows of standard label positions and a row of handwriting areas are correspondingly preset on the surface or the back face of the transparent expansion wing, and the handwriting areas are located below the last row of standard label positions. A matte coating is arranged on the surface of the handwriting area, N is a positive integer larger than or equal to 2, and a weak adhesive layer with the adhesive strength smaller than that of the adhesive layer on the bottom face of the transparent base film is arranged on the standard label position face. Elastic adjustment of the label capacity is achieved through the transparent expansion wings, handwriting input is met, and the red emergency treatment identification is arranged at the top of the surface of the transparent base film and is easy to recognize and not prone to falling off.

The invention discloses a post-treatment liquid and application thereof in an anode foil formation post-treatment process, and the post-treatment liquid comprises the following components in percentage by mass: 0.1-5% of a main film-forming agent, 0.05-3% of a synergistic stabilizer and the balance of a solvent, the main film-forming agent is selected from at least one of a waterborne polyurethane emulsion and a silane coupling agent; the synergistic stabilizer is selected from at least one of organophosphate, molybdate and tungstate. The main film-forming agent and the synergistic stabilizer are compounded to obtain the post-treatment liquid, on one hand, the synergistic stabilizer is firmly combined with an aluminum oxide substrate to carry out deep passivation treatment on an oxidation film on the surface of the anode foil, and on the other hand, the synergistic stabilizer is subjected to network crosslinking with a hydrophobic protection layer formed by the main film-forming agent; the three-dimensional composite protective film can effectively isolate water molecules, repair microdefects on the surface of an oxidation film, prevent the phenomena of specific volume attenuation, leakage current increase and the like of the anode foil, and improve the long-term working reliability of the capacitor.

The utility model belongs to the field of water treatment and material separation, and provides a reversible cross-flow filtering membrane device, which comprises a membrane unit, a water outlet end interface, two circulation end interfaces, a first pipeline, a second pipeline, a second pipeline and a third pipeline, the membrane unit is provided with a water production end interface and two circulation end interfaces, the two circulation end interfaces are communicated through the first pipeline, the first pipeline is provided with a two-way liquid pumping assembly, and the flow direction of fluid can be changed through the two-way liquid pumping assembly; an outlet of the water inlet pump communicates with the first pipeline, and a check valve is arranged at the outlet of the water inlet pump; and the water producing tank is communicated with the water producing end interface through a second pipeline. According to the device, the two circulation end interfaces of the membrane unit are communicated through the first pipeline to form a circulation loop, and then the reversing of circulating water flow can be realized through the two-way liquid pumping assembly. By arranging a pressure sensor, a control system and the like, the circulation direction can be automatically switched according to pressure or timing, and bidirectional cross-flow filtration of the membrane unit is realized. The accumulation of pollutants on the surface of the membrane can be avoided, the risk of membrane pollution blockage and scaling is reduced, high flux can be maintained, the membrane washing frequency is reduced, and the operation cost is reduced.

The invention provides an ultra-low pressure reverse osmosis membrane production process and production equipment thereof. The equipment comprises a membrane treatment assembly, a film rolling machine is arranged on one side of the film processing assembly. The device further comprises an unwinding machine, the unwinding machine is arranged on the side, away from the film winding machine, of the film processing assembly, a plurality of first motors are arranged on the unwinding machine, and an air swelling shaft is installed on an output shaft of each first motor; the multiple air swelling shafts are each provided with a material carrying roller, and a base film wound on the material carrying rollers stretches into the film processing assembly. And the sweeping mechanism is used for sweeping the base film. After the base film is unwound, dust and dirt on the surface of the base film can be cleaned and removed through the cleaning mechanism, so that the dust and the dirt are prevented from being clamped and hidden in a composite base material, and the quality of a final product is guaranteed.

The invention discloses an organic boric acid compound with a thermal response behavior and a membrane material prepared from the organic boric acid compound, and relates to the technical field of thermal response intelligent covalent organic polymer membranes. According to the organic boric acid compound, condensation is induced through vacuum dehydration of boric acid groups in a molecular structure, a boron-oxygen-six-ring cross-linked network can be constructed on the surface of a membrane, and the thermal response behavior is achieved. The network has a clear UCST type thermal response mechanism, when the temperature is lower than the cloud point temperature, the compound forms a stable aggregate, so that the membrane surface presents a specific pore structure and surface characteristics, when the temperature is higher than the cloud point temperature, the aggregate is dissociated into a monomer, the hydrophilicity and hydrophobicity and pore size of the membrane are dynamically adjusted, and the membrane surface has a specific pore structure and surface characteristics. The thermal response behavior derives from conformational change driven by intramolecular hydrogen bonds, complex polymer synthesis steps are not needed, temperature regulation and control of membrane performance can be achieved only through micromolecule self-assembly, and a simple and environment-friendly technical path is provided for preparation of a thermal response membrane material.

This invention relates to the field of polytetrafluoroethylene (ePTFE) membrane technology. Addressing the problem that existing expanded PTFE films cannot meet the high-performance standards of superhydrophobicity and superoleophobicity, this invention specifically discloses an expanded PTFE composite membrane and its preparation method. The expanded PTFE composite membrane includes an ePTFE base membrane and an fPTFE / SiO2 particle composite layer disposed on the surface of the ePTFE base membrane. The fPTFE / SiO2 particle composite layer includes a PTFE composite and SiO2 particles. The PTFE composite comprises polyethylene oxide and PTFE in a dry weight ratio of 1:10-30, and the SiO2 particles have a particle size of 100-1000 nm. By coating the ePTFE base membrane with PTFE and SiO2 particles to construct the fPTFE / SiO2 particle composite layer, and then modifying the membrane surface with silica-fluorination, the distribution of SiO2 particles can be specifically controlled to impart superhydrophobic and superoleophobic properties to the expanded PTFE composite membrane, with both water and oil contact angles >150°.

The invention relates to the field of membrane surface treatment, in particular to membrane surface treatment equipment. The device comprises a rack, a transfer film conveying device for conveying a transfer film, a display film conveying device for conveying a display film and a coating device are arranged on the rack, the coating device comprises a glue spraying module, an extrusion module and an ultraviolet curing lamp, the extrusion module is provided with a stainless steel roller and an extrusion roller which are rotationally connected to the rack, and the ultraviolet curing lamp is provided with a water cooling system. The glue spraying module sprays glue between the transfer film and the display film, the transfer film and the display film are fed at the same speed to bring the glue into gaps to be evenly distributed, and the ultraviolet curing lamp cures the glue. The device further comprises a specific conveying shaft, a platform, a roller shaft, an adjusting device and the like. According to the device, the effects that the glue is uniformly coated and cured on the surface of the display membrane, membrane surface treatment is achieved, the outer surface of the coated display membrane has the frosted texture, meanwhile, glue leakage is avoided, and the membrane is convenient to recycle are achieved.

The invention relates to a method for synergistically regulating and controlling the aperture of a material separation membrane based on electric field-vacuum heating, which comprises the following steps: S1, uniformly mixing polysulfone, an additive and a solvent, and preparing a supporting layer membrane casting solution; s2, coating the surface of a polyolefin-based microfiltration membrane with the supporting layer membrane casting solution obtained in the step S1, and preparing a polysulfone ultrafiltration base membrane through immersion precipitation phase inversion; s3, uniformly mixing sulfonated polysulfone, N, N-dimethylformamide, ethylene glycol monomethyl ether and a pore-preserving agent to prepare a sulfonated polysulfone separation layer membrane casting solution; and S4, coating the surface of the polysulfone ultrafiltration base membrane obtained in the step S2 with the sulfonated polysulfone separation layer membrane casting solution obtained in the step S3, applying a direct-current electric field perpendicular to the surface of the membrane, and simultaneously performing vacuum heating to obtain the material separation membrane. An electric field and vacuum heating synergistic technology is adopted to induce oriented arrangement of sulfonated polysulfone to form an ordered structure, the membrane pore size and the membrane structure consistency are accurately controlled, and the membrane permeation flux and separation selectivity are optimized.

The invention discloses a moss-based vegetation restoration system, and relates to the technical field of moss ecological restoration, the system realizes active capture, collection and directional drainage of trace water resources in the environment by introducing condensation potential analysis, flow guide membrane layout optimization and water guide adjustment, and the utilization efficiency of condensate water is significantly improved. Compared with a traditional mode which only depends on natural rainfall or passively covers a thin film, the arrangement path of the flow guide film can be scientifically planned according to environment monitoring data and topographic features, efficient convergence of condensate water is guaranteed, and the flow guide film can be effectively collected through real-time iterative adjustment of flow guide film microstructure parameters. Water supply requirements under different seasons, day and night and climate changes are dynamically met, and therefore the problem of water shortage in the early moss planting stage is effectively solved. The flow guide membrane surface micro-slope structure parameters are subjected to adjustable design, iterative adjustment is performed according to the real-time condensate water forming amount, relatively stable water supply is maintained, and condensate water loss is reduced.

This invention relates to the field of wastewater treatment technology, and in particular to a wastewater purification and reuse device based on a membrane bioreactor. Addressing the limited removal efficiency of pollutants adhering to membrane elements in existing technologies, this invention provides a wastewater purification and reuse device based on a membrane bioreactor. The device includes a treatment tank containing a membrane bioreactor assembly. The assembly includes an assembly frame with multiple membrane elements mounted on it. Scrapers that cooperate with the membrane elements are located on both sides of a horizontal plate. A cleaning assembly also includes a vertically movable frame. When the frame moves downwards, the horizontal plate moves downwards, and the scrapers clean the outer surface of the membrane elements downwards. A movable scraper is located on a support, and a collection box is located on one side of the support. When the scraper moves to one side, the collection box opens. By directly scraping away impurities adhering to the outer surface of the membrane elements, suspended solids, colloidal particles, microbial flocs, and other pollutants on the membrane surface can be removed quickly and effectively.

The invention relates to a sound guidance structure for a sound-generating device (1) in a vehicle (3), wherein the sound-generating device has a membrane (5) for sound generation and the sound guidance structure has a plurality of curved and non-intersecting ribs (7) which extend in a plane perpendicular to an extension plane of the membrane, wherein each of the ribs (7) has a vertex and wherein the vertices are spaced apart from each other along a straight line which is substantially parallel to the surface of the membrane (5).

The utility model provides an oil coating pool for waterproof coiled material production, and belongs to the technical field of waterproof coiled material production. The oil coating pool for waterproof roll production comprises a pool body and an oil coating residue removing mechanism, a support is installed at the top of one side of the pool body, a supporting roller is installed in the support through a shaft pin, a residue removing frame is fixedly connected to the top of the pool body, and residue removing rods are fixedly connected to the two ends of the side, away from the support, of the residue removing frame. By arranging the oil coating and residue removing mechanism, a medium for coating oil on an external waterproof coiled material and removing redundant oil bodies can be provided for a user, so that the pool body can remove the redundant oil bodies attached to the surface of the waterproof coiled material, the situation that too much oil bodies are attached to the surface of the waterproof coiled material is avoided, and the waterproof coiled material is prevented from being damaged. The situation that the coating uniformity of the oil body on the surface of the waterproof coiled material is reduced due to the fact that the oil body moves out of the pool body along with the waterproof coiled material and drips and is wasted is avoided, and therefore the oil coating residue removing effect and the oil coating uniformity of the pool body are improved.

The invention relates to a heat-insulating film (2) for a pressure sensor (1) for determining the pressure of a fluid medium (F), comprising a film body (3) and a coating (5), a film surface (6) of the film body (3) facing the fluid medium (F) when the heat-insulating film (2) is used. The coating (5) has a layer-like structure (7), the longitudinal extension (DL) of which perpendicular to the film plane (XY) is at most half of the transverse extension (DQ) of which parallel to the film plane (XY) for a plurality of layers (9).

The utility model relates to a membrane structure and a water purification device, and relates to the technical field of water purification treatment. The diaphragm structure comprises a diaphragm group and at least one separator, the diaphragm group comprises at least two layers of diaphragm bodies, the at least two layers of diaphragm bodies are sequentially stacked, and the front surfaces of the two adjacent layers of diaphragm bodies are oppositely arranged to form a water inlet runner; the membrane body is provided with a first side and a second side which are oppositely arranged in a first direction, the first side is provided with a raw water inlet communicated with the water inlet flow channel, and the second side is provided with a concentrated water outlet communicated with the water inlet flow channel; at least one separator is arranged in the water inlet flow channel, and the separator is configured to be capable of separating the water inlet flow channel so as to improve the flow speed of fluid in the water inlet flow channel. According to the technical scheme disclosed by the utility model, the membrane surface concentration polarization layer phenomenon can be weakened, the anti-pollution capability of the membrane structure is improved, and the service life of the membrane structure is prolonged.

The utility model belongs to the technical field of medical equipment, and discloses a medical film continuous film clamping device which comprises a water tank, a shell is fixed at the top end of the water tank, a lower film clamping roller is rotatably connected to the inner wall of the shell, a transmission mechanism is arranged at the input end of the lower film clamping roller, and the transmission mechanism comprises a conveying cavity, a main gear and a connecting rod. The conveying cavity is formed in the inner wall of the shell, an atomizing nozzle is arranged at the bottom end of the spraying pipe, and through cooperation of the conveying cavity, the main gear, the connecting rod and other assemblies, the main gear and the secondary gear can be driven to rotate when the motor is started, so that water in the water tank can be conveyed into the conveying cavity through the connecting rod; and a water source can be atomized and sprayed to the surface of the medical film through a conveying pipe, a spraying pipe and an atomizing nozzle at the top end of the conveying cavity, so that the purposes of cooling the medical film and reducing friction force are achieved, damage to a film body when the medical film is clamped and conveyed can be prevented, and the conveying efficiency of the medical film is guaranteed.