277 results about "Membrane bodies" patented technology

The invention belongs to the technical field of sewage treatment and membrane separation, and provides an in-situ nondestructive membrane pollution detection system and method based on an ultrasonic transmission signal, and the system comprises an ultrasonic excitation module which is used for generating a sine wave excitation signal which penetrates through a membrane body to excite the ultrasonic transmission signal for pollution detection; the signal processing module is used for continuously collecting and preprocessing ultrasonic transmission signals of the clean membrane body and the membrane bodies with different pollution degrees, extracting ultrasonic transmission signal characteristics under different pollution degrees, and establishing a pollution thickness-signal characteristic mapping model; wherein the ultrasonic transmission signal features comprise a time-frequency domain energy gravity center feature and a frequency attenuation spectrum slope feature; and the pollution detection module is used for judging the pollution stage of the membrane body to be detected based on the pollution thickness-signal feature mapping model, and completing in-situ nondestructive membrane pollution detection. According to the technical scheme, the sludge pollution state in the ceramic membrane and flat membrane filtering process can be monitored in real time, and early warning and pollution dynamic tracking are achieved.

The invention discloses a Fe / C loaded membrane module, a PN / A-MABR autotrophic nitrogen removal device, a preparation method and a sewage treatment method, and belongs to the technical field of sewage treatment. According to the invention, the problem that the treatment effect is influenced by NO3 <->-N accumulation in the existing membrane aeration coupling partial nitrification-anaerobic ammonia oxidation process is solved. Comprising a frame and a membrane body attached to the outer portion of the frame, the membrane body comprises a hydrophobic organic membrane layer, an iron-carbon material layer and a biological membrane layer which are sequentially arranged, and the hydrophobic organic membrane layer is attached to the outer portion of the frame. The iron-carbon material is added between the hydrophobic organic membrane layer and the biological membrane layer, the iron-carbon micro-electrolysis process is coupled with the dissimilatory process of nitrate generated by microbial metabolism, the removal of NO3 <->-N generated by anaerobic ammonia oxidation is enhanced, and the total nitrogen removal efficiency is improved.

The application discloses a bipolar membrane electrodialysis device, which comprises an outer box body and further comprises a liquid inlet mechanism, a plurality of electrodialysis mechanisms and a plurality of filtering mechanisms. The filtering mechanism comprises a filtering box, a driving filtering assembly and a liquid feeding assembly. The driving filtering assembly comprises a motor installed on the top of the filtering box, the output shaft of the motor is fixedly connected with a threaded rod, the outer periphery of the threaded rod is threadedly connected with a filtering plate slidingly connected to the inner wall of the filtering box, and the bottom inner wall of the filtering box is fixedly connected with a plurality of plug rods matched with filtering holes of the filtering plate. Raw water is delivered to the inside of the filtering box through the liquid inlet mechanism, is actively filtered without turbulence through the driving filtering assembly, is delivered to the corresponding electrodialysis mechanism through the liquid feeding assembly and is further subjected to electrodialysis treatment. The filtering plate and other components are arranged to filter out the solid impurities mixed in industrial glucose acid salt, so that the bipolar membrane electrodialysis process and the bipolar membrane body are not affected.

The invention relates to a water treatment and membrane separation technology, and provides an integrated catalytic separation membrane, a preparation method thereof, and a water treatment method and system. According to the membrane, polyvinylidene fluoride is used as a continuous phase to form a porous matrix, and cerium dioxide is embedded and fixed in a mode of uniform dispersion in a membrane body in a phase inversion membrane forming process; in the presence of illumination and peroxysulfate, active species are generated through in-situ activation on a membrane-water interface, and membrane separation is completed synchronously. The water treatment method comprises the following steps: adding peroxymonosulfate or peroxydisulfate into a water body to be treated, and filtering through the membrane under illumination; the photothermal effect generated by organic matter degradation intermediates in operation inhibits membrane pollution and maintains flux. According to the invention, short-range coupling of active sites and mass transfer channels is realized, the medicament and energy utilization rate is improved, the coating stripping and metal dissolution risk is reduced, and the method is suitable for drinking water pretreatment, reclaimed water deep treatment and treatment of water containing natural organic matters / humic acid.

The invention discloses a method for improving the crystallinity of a flexible covalent organic framework film through solvent heat treatment, and relates to the technical field of flexible functional film materials, and the method comprises the following steps: (1) synthesizing a COF film; (2) soaking the COF membrane in a triethylamine methanol solution to remove residual acidic components; and (3) putting the treated membrane into an acetic acid acetonitrile solution, and heating at 100 DEG C for 0.5-6 hours to improve the crystallinity of the membrane. According to the method, rearrangement of framework chain segments in a film body and enhancement of crystallinity are achieved through the mild two-step solution treatment step, the XRD diffraction intensity, the film body compactness and the structural orderliness of the COF film are remarkably improved, and meanwhile the flexibility and the mechanical property of an original film are kept.

The utility model relates to the technical field of batteries, in particular to a battery. The battery core coating film comprises a film body which is provided with two film bodies opposite to the two side surfaces of a battery core in the thickness direction respectively; the supporting assembly is arranged on the surface, facing the battery cell, of the membrane body, the supporting assembly comprises a supporting piece and an elastic telescopic piece, the supporting piece comprises a central area and an edge area surrounding the central area, the central area is connected with the membrane body, and a gap is formed between the edge area and the membrane body; the elastic telescopic piece is arranged in a gap between the edge area and the membrane body, and the two ends of the elastic telescopic piece are connected with the membrane body and the supporting piece respectively. According to the battery disclosed by the utility model, the positive plate and the negative plate of the battery cell are stably attached through the supporting assembly, so that the service life of the battery is prolonged, and the satisfaction degree of a user is improved.

The invention relates to the technical field of sewage treatment, and discloses RO (reverse osmosis) sewage treatment equipment and a treatment method, and the RO sewage treatment equipment comprises a workbench, a filtering assembly, a conveying assembly, an adjusting roller and a half gear. Through cooperative work of the half gear, the adjusting roller and other parts, when the reverse osmosis membrane body is blocked, the next group of membrane body can be automatically switched to a working position, frequent manual intervention is not needed, the human input is greatly reduced, the cleaning time is shortened, and the sewage treatment continuity and stability are remarkably improved; meanwhile, aiming at the defects that a membrane element is easy to damage and the service life is influenced in the traditional disassembly and cleaning, a'filtration-backflushing 'integrated operation mode is adopted, part of filtered liquid reversely flows into a reverse osmosis membrane body which does not participate in the filtration operation at a low flow speed for flushing, and impurities on the surface of the membrane are effectively removed by utilizing residual pressure of filtrate; and the damage risk caused by physical disassembly is avoided.

The invention discloses a polyarylene ether nitrile nanofiber membrane and a preparation method of the polyarylene ether nitrile nanofiber membrane through double-solvent synergistic electrostatic spinning, and relates to the field of high polymer material preparation. The method comprises the following steps: preparing two electrostatic spinning solutions with obvious volatilization rate and dissolution parameter difference, and alternately depositing two types of fibers on a collecting surface by adopting dual-channel synergistic electrostatic spinning; in the deposition and drying process, chain segments at fiber cross points are induced to swell, mutually diffuse and cure in situ to form bonding points by utilizing the poor evaporation rate of a high / low volatile solvent and the poor solvent-polymer compatibility, so that the self-densification and the structure stabilization of the nanofiber membrane are realized. The obtained nanofiber membrane has high-density in-situ bonding points and remarkably improved mechanical properties, does not need additional post-treatment such as hot pressing or solvent spraying, and is suitable for application such as interlayer reinforcement and interface toughening of composite materials. The process has continuity and controllability, and the density and mechanical properties of the membrane body can be customized by adjusting a solvent system and spinning parameters.

The utility model provides an auxiliary device for sleeving a casing into a filling pipe, which comprises a curled film main body, the film main body is curled in a natural state to form a C-shaped tubular structure with a longitudinal opening, and horn mouth parts are arranged at two ends of the film main body. By arranging the curled film main body and utilizing the C-shaped tubular structure formed in the natural state, when the auxiliary device is sleeved into the filling pipe, the tubular film main body can form a temporary isolation layer between the casing and the filling pipe. And the chance that the casing is in direct contact with the port or the pipe wall of the filling pipe is reduced, so that the risk that the casing is damaged due to direct scratching is reduced, and the casing is protected. And the horn mouth parts arranged at the two ends of the film main body provide effective guidance for sleeving the auxiliary device into the filling pipe and subsequently sleeving the casing into the auxiliary device. Therefore, an operator can more easily align and place the auxiliary device at the port of the filling pipe, the alignment operation is simplified, and the smoothness of the sleeving process is improved.

The utility model discloses a vacuum membrane dehumidification device taking a hollow fiber membrane as a carrier. The vacuum membrane dehumidification device comprises a pipe joint assembly, a connecting assembly, a hollow fiber dehumidification membrane working assembly and a vacuum pump, the pipe joint assembly comprises a first joint and a second joint; the connecting assembly comprises a first sleeve, a hollow pipe and a second sleeve; the hollow fiber dehumidification membrane working assembly comprises a first threaded pipe fitting, a hollow fiber dehumidification membrane pipeline and a second threaded pipe fitting. And the hollow fiber dehumidification membrane pipeline is arranged between the first threaded pipe and the second threaded pipe. The hollow pipe is provided with a ventilation opening used for being connected with a vacuum pump. Compared with the prior art, the dehumidification device adopts a vacuum film dehumidification technology, can realize stable dehumidification of gas, has the characteristics of being compact in structure, flexible and convenient to install, easy to maintain and repair and easy to iterate and upgrade, and solves the problems that an existing vacuum film dehumidification device is tedious in film body disassembly and replacement steps, low in cost and the like. And the surface area of the film body of the selective vacuum dehumidification film is difficult to effectively increase.

The application discloses a soil-rock dam reinforcing and enhancing structure for preventing over-standard overflow dam break and a construction method thereof. The structure comprises a soil-rock dam filling body, a vertical anti-seepage core wall arranged in the soil-rock dam filling body, and a composite high-strength fiber three-dimensional membrane arranged on the surface of the dam slope after regulation. The membrane body is unfolded along the slope surface and is reinforced by a pressing plate type fixing anchor bolt and a fiber membrane three-dimensional rivet. The row-to-row spacing of the fixing anchor bolt is 20-50 cm, so that the composite membrane is tightly attached to the dam body. The rigid structure and the flexible protection material are organically combined, the dam body's erosion resistance and durability are significantly improved while the flood discharge capacity is ensured, the construction method is simple, the cost is low, and the method is suitable for flood control reinforcement and safe operation of various soil-rock dams.

The invention discloses a liquid storage bottle with water-blocking and air-permeable effects, belongs to the technical field of water-blocking and air-permeable of biochemical containers, and solves the problem of failure of a water-blocking and air-permeable membrane caused by contact between a large amount of liquid and the water-blocking and air-permeable membrane in the prior art. The invention discloses a liquid storage bottle with water-blocking and ventilating effects. The liquid storage bottle comprises a spiral bottle cap, a liquid inlet pipe, a liquid outlet pipe, ventilating holes and a water-blocking and ventilating device, the liquid inlet pipe and the liquid outlet pipe are arranged in the spiral bottle cap, the ventilation hole is formed in the middle of the spiral bottle cap, and the water blocking ventilation device is installed on the inner side of the middle of the spiral bottle cap. Through the arrangement of the shell, the film body and the water blocking holes, when the liquid storage bottle vibrates and splashes liquid, the shell prevents a large amount of liquid from being splashed and making contact with the film body, and the water blocking and air permeability of the film body is guaranteed.

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.

This utility model discloses a winding and traction device for a waterproof membrane production line, belonging to the field of waterproof membrane production. The winding and traction device for a waterproof membrane production line includes a base, an adjustment mechanism for the interior of the trough and the surface of the first traction roller, a clamping and anti-loosening mechanism for the fixing frame and the surface of the waterproof membrane body, and an automatic feeding mechanism inside the holding trough. This utility model not only ensures stable transmission and precise winding of waterproof membrane bodies of different thicknesses during use, preventing deviation and gaps between the waterproof membrane bodies during winding, thus improving the winding effect, but also increases production efficiency and enhances the automation level of the winding and traction device.

The utility model relates to the technical field of water purifiers, in particular to an outlet water temperature adjustable water purifier for delivery in water, which comprises a mechanical filter body, a softener body, a security filter body, a balancer body, a high-pressure pump body, an RO (reverse osmosis) membrane body, a first heater body and a second heater body, the mechanical filter body, the softener body, the security filter body and the balancer body are connected through a first pipeline, the balancer, the high-pressure pump body and the RO membrane body are connected through a third pipeline, the RO membrane body, the first heater body and the second heater body are connected through a fourth pipeline, and a water outlet is formed in the tail end of the fourth pipeline. The water outlet is connected with the balancer body through a third pipeline; the water purifier has the beneficial effects that a pure water tank is not needed, and a direct supply mode is adopted, so that pure water does not stay and circulates, and bacteria breeding is avoided.

The utility model belongs to the field of films, particularly relates to a special film for enhancing a CT (Computed Tomography) indwelling needle, and aims to solve the problems that the conventional film cannot improve the stability and comfort of the film on the skin of a patient, so that the film is loosened and falls off or the patient feels uncomfortable, and the comfort and safety are reduced. A hollow hole matched with the shape of an indwelling needle is formed in the center of the top of the film body, and the film body comprises a protective layer, a breathable layer and an adhesive layer; the fixing assembly is arranged on the membrane body and used for reinforcing fixation of the membrane body. Through the combination of the fixing assembly, the hollow holes and the film body, the stability of the sticking film on the skin of a patient is remarkably improved, the sticking film is effectively prevented from loosening or falling off, safety and stability of an indwelling needle in the examination process are ensured, meanwhile, discomfort of the patient is relieved, and comfort and safety are improved.

The utility model discloses an ultrafiltration membrane test platform device, which belongs to the technical field of ultrafiltration membrane test platform devices, and is characterized by comprising a bottom plate, the top of the bottom plate is fixedly connected with a simulation assembly, the bottom of the simulation assembly is in threaded connection with an ultrafiltration membrane body, and the top of the bottom plate is fixedly connected with a detection assembly; the simulation assembly comprises a box body, the top of the box body is provided with a first cavity and a plurality of second cavities, the top of the box body is rotatably connected with a top cover, and the top of the top cover is provided with a first valve and a second valve. The problems that most of existing sewage is relatively single, different conditions or different turbidity cannot be simulated conveniently, and certain limitation is caused are solved.

The invention relates to a degradable nerve repair membrane and a preparation method thereof, and belongs to the technical field of nerve repair membranes, the degradable nerve repair membrane comprises a biological composite structure inner layer, a support outer layer and a bonding layer, and the biological composite structure inner layer and the support outer layer are bonded through the bonding layer. According to the invention, polypyrrole with excellent electrochemical activity, environmental stability, controllable conductivity and poor mechanical properties and collagen nanofibers with high biocompatibility and capable of forming a nano-scale fiber network are adopted to form a conductive-biological composite structure as an inner layer through electrostatic spinning, and the PLGA porous membrane is prepared through 3D printing. A PLGA porous membrane with parallel axial microchannels on the surface is used as an outer layer, so that the membrane body structure can effectively guide directional growth of axons while ensuring conductivity, accurate preparation can be realized according to needs, the degradation period is matched with the nerve regeneration rate, and the degradation time can be regulated and controlled through the proportion of a copolymer; the repairing effect is prevented from being influenced by too fast or too slow degradation.

The film tearing system comprises a mechanical arm and a film tearing device, the film tearing device comprises a machine table, a rotator is installed on the machine table, the rotator is in driving connection with a rotating rod, a plurality of film collecting needles are fixedly arranged on the rotating rod, a push-pull device is fixedly installed below the machine table, and the push-pull end of the push-pull device is fixedly connected with a plurality of material stirring plates. And the plurality of shifting plates and the plurality of film collecting needles are arranged in a one-to-one correspondence manner. According to the utility model, the rotator drives the rotating rod and the film collecting needle to puncture and strip the film, and the push-pull device drives the material stirring plate to work cooperatively, so that the stripping, collection and waste treatment of the film body can be completed quickly and accurately, the film body is ensured to be effectively removed, and the subsequent influence caused by film retention is avoided. Particularly, due to the design of the U-shaped notch in the material shifting plate, the film body is isolated and removed while the film collecting needle is ingeniously embedded, and the film shifting success rate and efficiency are improved.

The utility model relates to the technical field of cutting equipment, in particular to a nanofiltration membrane cutting device, which comprises a base, a cutting device, a cutting device and a cutting device, the cutting mechanism is used for cutting the nanofiltration membrane, and the cutting mechanism is arranged on the rack; the stabilizing mechanism is arranged on the rack and comprises a stabilizing plate, a pressing plate and a stabilizing driving part, the stabilizing plate is fixedly connected with the rack, the pressing plate is located above the stabilizing plate, the output end of the stabilizing driving part is in transmission connection with the pressing plate, and the stabilizing driving part is used for providing power for the pressing plate to get away from or get close to the stabilizing plate; a space for a nanofiltration membrane to penetrate through is formed between the pressing plate and the stabilizing plate, and lower avoiding grooves are distributed in the front end of the stabilizing plate at intervals in the cutting direction; the grabbing mechanism is arranged on the base, through cooperation of an upper receding groove in the pressing plate and a lower receding groove in the stabilizing plate, a grabbing piece retreats into the upper receding groove and the lower receding groove during cutting, the edge of a film body does not need to be reserved, and the material utilization rate is increased by 5% or above.

The invention relates to the technical field of electrolytic baths, in particular to a device for improving the current efficiency of an ionic membrane electrolytic bath, which comprises a bath body, an anode body, a cathode body and an ionic membrane body, and further comprises a first liquid supplementing port and a second liquid supplementing port which are arranged on the two sides of the bath body, and liquid supplementing cooling mechanisms are arranged inside and outside the bath body; the vertical cylinder is rotationally connected to the surface of the partition plate; in the liquid supplementing process, liquid pushes the rotating disc to rotate so as to drive the vertical cylinder and the ribs to rotate under the action of the transmission rod, the ribs capture bubbles around the anode through micropores in the surface in the rotating process and cut the bubbles through crushing teeth in the ribs, and then the situation that a large number of bubbles are gathered around the anode body is prevented; and meanwhile, through the power generated by the flowing of the supplemented liquid, the energy consumption of the device can be saved.

What is suggested is a micromembrane pumping device for pumping a fluid, having: a pump chamber to which an inlet valve, an outlet valve, and a membrane device for varying a volume of the pump chamber are associated, wherein the membrane device has a plate-shaped actuator for deforming the membrane device; and influencing means for influencing the plate-shaped actuator and the volume of the pump chamber; wherein the membrane device has a plate-shaped membrane body limiting the pump chamber; wherein the plate-shaped actuator is arranged on a side of the plate-shaped membrane body facing away from the pump chamber; wherein the plate-shaped actuator is mounted to and electrically insulated from the plate-shaped membrane body by an electrically insulating glue layer; wherein at least one embedded portion of a support body at or in which a deformation sensor for detecting a deformation of the membrane device is arranged, is arranged within the glue layer to detect the volume of the pump chamber; wherein the influencing means, the plate-shaped actuator and the deformation sensor form a closed-loop control circuit for regulating a volume flow.

The utility model discloses a proton exchange membrane strength detection device provided by the utility model, and the mounting frame includes oppositely arranged left frame body and right frame body, is provided with drive mechanism and the winding roller of drive mechanism connection on the right frame body, is provided with right fixed establishment on the right frame body, and the right fixed establishment includes right limit frame and right limit component setting on right limit frame, is provided with tension test mechanism and left fixed establishment on the left frame body, and the left fixed establishment includes left limit frame and first limit component and second limit component setting on left limit frame, is provided with adjusting drive component on left limit frame. The utility model provides proton exchange membrane strength detection device, and right limit component, first limit component and second limit component can fix the both ends of membrane body automatically, and increase the contact area with membrane body, avoid the indentation, breakage and other conditions of the local force of membrane body too big.

The utility model relates to the field of proton exchange membrane post -treatment technology, especially a kind of cleaning treatment device of proton exchange membrane. Realize the collaborative optimization of impurity efficient removal and membrane body structural integrity protection in the cleaning process of proton exchange membrane. Including: cleaning tank;Side is equipped with washing liquid import, and the flow direction of washing liquid in tank is contrary with the membrane moving direction;Reverse unwinding assembly, it is arranged in tank inside, for carrying and unwinding the membrane to be handled;Guide roller assembly, it is connected with the outlet of reverse unwinding assembly, and it is arranged in tank bottom in arc shape, for providing mobile guide for membrane;Vacuum tension roller, it is arranged in the end of guide roller assembly, for controlling the discharge tension of membrane;Ultrasonic assembly, it is arranged in the bottom of tank, and the layout path is consistent with the arc arrangement path of guide roller assembly, for ultrasonic cleaning to proton exchange membrane;Air knife assembly, it is arranged in cleaning tank, for removing membrane surface residual liquid, and the air outlet direction is contrary with the moving direction of proton exchange membrane.

The invention discloses an array type acupoint electrical stimulator based on autism patient emotion regulation, and belongs to the technical field of electrical stimulators, the array type acupoint electrical stimulator comprises a fixing band fixed on the body of a patient, an instrument controller is fixedly installed in the middle of the fixing band, sliding grooves are symmetrically formed in the fixing band, and the instrument controller is fixedly installed in the sliding grooves. Adjusting mounting bases are symmetrically arranged on the fixing belt in a sliding mode, a fixing base is fixedly installed on the adjusting mounting bases, a movable connecting piece is rotatably installed on the fixing base, an adjustable attaching base is fixedly connected to the movable connecting piece, and an elastic film body is fixedly connected to the adjustable attaching base in a sealed mode. Therapeutic electrode plates are attached to the outer side of the elastic film body in an array mode. According to the array type acupoint electrical stimulator based on the emotion regulation of the autism patient, the electrode plates distributed in an array mode can be attached to the outside of the patient when the array type acupoint electrical stimulator is worn and used, multimode positioning can be achieved, it is ensured that the action position is accurate, and the electrical stimulation treatment effect is effectively improved.

The utility model discloses a spraying film cooling device, relates to the technical field of spraying film production cooling, and aims to solve the technical problems that in the prior art, when a produced spraying film is cooled at present, air cooling, cold water flushing and roller body attaching modes are mostly adopted for cooling, the spraying film is in a conveying state during cooling, and the cooling effect is poor. The problems that the cooling efficiency of the spraying film in unit time is not high enough, so that the spraying film cannot be quickly and effectively cooled to a specified temperature, and the use is not reliable enough are solved. A first guide roller and a second guide roller are arranged on the two sides of the cooling hopper correspondingly, a first cooling roller, a second cooling roller, a third cooling roller, a fourth cooling roller and a fifth cooling roller are rotationally connected to the interior of the cooling hopper correspondingly, and a film body is arranged in the cooling hopper; the film body bypasses the upper portion of the first guide roller, the upper portion of the first cooling roller, the lower portion of the second cooling roller, the upper portion of the third cooling roller, the lower portion of the fourth cooling roller, the upper portion of the fifth cooling roller and the upper portion of the second guide roller, and cooling water is injected into the cooling hopper.

The utility model discloses an exosome extracting device which comprises a collecting pipe, an ultrafiltration inner pipe and a pipe cover, the ultrafiltration inner pipe is clamped in a pipe body of the collecting pipe, the pipe cover is installed at the top end of the collecting pipe, the exosome extracting device further comprises a lining film mechanism, the lining film mechanism comprises supporting ribs, supporting ribs, opposite lining plates, a middle lining plate, a lifting ring and lining claw strips, and the supporting ribs are connected with the supporting ribs. A lining membrane mechanism is arranged in a collecting pipe of an ultrafiltration centrifugal pipe, supporting ribs and supporting ribs of the lining membrane mechanism are arranged in the collecting pipe to support and clamp a counter lining plate and a middle lining plate, and a bottom block body of an ultrafiltration inner pipe can penetrate through a lifting ring, so that a lower filter membrane is supported and connected by the middle lining plate and the counter lining plate; the lining plate and the middle lining plate are provided with the lining claw strips to support the ultrafiltration membrane of the ultrafiltration inner pipe, the deformation degree of the ultrafiltration membrane is effectively limited, breakage caused by excessive deformation of the membrane body is avoided, the success rate of exosome extraction is increased, and the quality of exosome is guaranteed.

The utility model discloses a membrane module cleaning and antifouling structure, which relates to the technical field of water source treatment and comprises a treatment pond, a shell is fixed on the outer side of the treatment pond, one side of the shell is communicated with a water inlet pipe, and two groups of lifting components are arranged on the outer side of the treatment pond. The membrane cleaning device has the beneficial effects that the spray head and the scraper synchronously move along with the connecting plate, the spray head flushes the edge and dead corners of the membrane body through continuous movement, meanwhile, the scraper scrapes stubborn pollutants on the surface of the membrane body, and all-directional coverage of water flow is realized through a mode of integrating various membrane cleaning components; the cleaning effect is improved; by pulling the shifting block to move towards one side, the locking block is separated from the inner side of the limiting groove, then the cover plate is not limited, the filter plate on the inner side of the shell can be taken out, disassembly is completed, tools are not needed, the overall replacement steps are simple, and the maintenance efficiency of the membrane module is improved.

The utility model relates to the technical field of elastic facial mask cloth, and discloses elastic facial mask cloth which comprises a mask body, covering paper and connecting pieces, the covering paper is located above the mask body and connected with the mask body in an attached mode, the connecting pieces are located above the covering paper and connected with the covering paper in an attached mode, four sets of telescopic belts are arranged, one ends of the telescopic belts are fixedly connected with the connecting pieces, and the other ends of the telescopic belts are fixedly connected with the connecting pieces. The other ends of the telescopic belts are fixedly connected with the film body, two groups of folding lines are arranged outside the connecting piece, the two groups of folding lines are symmetrically arranged, the four groups of telescopic belts are symmetrically arranged in pairs, hook-and-loop fasteners are arranged at the top of the connecting piece, and the hook-and-loop fasteners are symmetrical with the folding lines as the center. The mask body is movably connected with two sets of eye covering pieces and a set of lip covering pieces, and the lip covering pieces are located below the eye covering pieces. By arranging the telescopic belt, when a user sits to use the facial mask, the facial mask is not prone to falling off from the face, and therefore the facial mask is convenient to use.

The utility model belongs to the technical field of waterproof coiled materials, and particularly relates to a high-durability root-puncture-resistant PVC (polyvinyl chloride) waterproof coiled material which comprises a coiled material body, the coiled material body comprises a wear-resistant layer, a PVC base layer is arranged at the top of the wear-resistant layer, a root-puncture-resistant layer is arranged at the top of the PVC base layer, an ultraviolet protection layer is arranged at the top of the root-puncture-resistant layer, and a waterproof layer is arranged at the top of the ultraviolet protection layer. Through the arrangement of the inserting holes, the first protrusions, the inserting rods, the clamping strips and the clamping grooves, during laying, the inserting holes are arranged on the corresponding inserting rods in a sleeving mode, the clamping grooves are aligned with the clamping strips, then the first mounting plate is pressed downwards, the clamping strips are clamped into the clamping grooves, the second protrusions can slide to the positions above the first protrusions, and the second protrusions can slide to the positions above the first protrusions. And after installation is completed, the first installation plate and the second installation plate are attached to each other, the first installation plate and the second installation plate can be preliminarily positioned through cooperation of an insertion rod and an insertion hole, the functions of secondary positioning and sealing can be achieved through cooperation of a clamping groove and a clamping strip, and the phenomenon of water seepage at the splicing position of the adjacent coiled materials can be effectively prevented.