185 results about "Membrane configuration" patented technology

Microelectromechanical systems (MEMS) apparatuses and processes are described that can employ a spring pillar or flexible pillar coupled to a sensing membrane to enhance deformation of the sensing membrane while providing robust MEMS sensors or devices. Described MEMS sensors or devices can comprise an exemplary spring pillar or flexible pillar between the sensing membrane structure and the backplate structure. Exemplary spring pillar or flexible pillar can facilitate adjusting stiffness of the sensing membrane to provide MEMS sensors or devices having large sensing area and compact device size.

The utility model provides a recoverable membrane structure for protein peptide extraction, which relates to the technical field of membrane recovery equipment and comprises a communicating pipe, a sealing cover fixed at the upper end of the communicating pipe, a recovery membrane arranged in the communicating pipe, a fixed base fixed in the sealing cover, a supporting spring fixed in the fixed base, and a sliding sleeve fixed at the upper end of the supporting spring. The sliding sleeve is slidably connected with the fixed base, a fixed inner wall is fixed in the fixed base, a sliding groove is formed in the upper end of the fixed inner wall, a fixed ball is slidably connected into the sliding groove, the fixed inner wall is detachably connected with a fixed column through the fixed ball, and a circular ring groove is formed in the surface of the fixed column. Therefore, a worker can replace and recycle the membrane more conveniently, the replacement efficiency of the membrane structure can be remarkably improved, the maintenance cost is reduced, and meanwhile, the efficiency of the whole production process is improved.

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.

In an embodiment a MEMS structure includes a back-plate structure, a support structure having a cavity, a membrane structure between the back-plate structure and the support structure, a first clamping structure having a first structured oxide layer between the support structure and the membrane structure, wherein an inner edge of the first clamping structure is laterally offset from an edge of the cavity, and wherein an offset of the first clamping structure forms a gap between the support structure and the membrane structure, and a second clamping structure having a second structured oxide layer and a first structured taper layer between the back-plate structure and the membrane structure, wherein the second structured oxide layer is arranged between the back-plate structure and the first structured taper layer, wherein an inner edge of the second structured oxide layer laterally extends over the cavity, and wherein the first structured taper layer is arranged between the second structured oxide layer.

The invention discloses scraper type thin film molecular distillation equipment which comprises a distillation retort, and a vibration structure is arranged in the distillation retort, serves as the inner wall of the distillation retort and is used for reducing material residues; the downward pressing structure is arranged on the vibration structure, and the downward pressing structure is used for driving the vibration structure so that the vibration structure can vibrate; and the film scraping structure is arranged on the inner side of the vibration structure, and the film scraping structure is used for evenly smearing the materials to the inner side of the vibration structure. According to the scraper type film molecular distillation equipment, the film scraping structure can dynamically adapt to different material characteristics, such as viscosity, adjustment of film scraping pressure and speed and uniform and controllable liquid film thickness through elastic matching of the compression-resistant spring, the sliding rod and the sliding groove of the bearing plate, combination of rotation speed adjustability of the speed reducer and real-time detection of the damping sensor on film scraping resistance; the problem that evaporation efficiency and separation selectivity are limited due to uneven liquid films of traditional equipment is effectively solved.

This utility model discloses a suspension decoupling membrane structure for reducing dynamic stiffness, relating to the field of automotive suspension technology. The device includes a diaphragm body located within a flow channel decoupling membrane groove. The diaphragm body has several first buffer ribs evenly distributed along its length on its upper and lower surfaces. Between adjacent first buffer ribs, several second buffer ribs are evenly distributed along their width on the diaphragm body, with the length direction of the second buffer ribs perpendicular to that of the first buffer ribs. The sides of the first and second buffer ribs away from the diaphragm body respectively abut against the top cover plate and the bottom of the flow channel decoupling membrane groove. This utility model enables the suspension decoupling membrane to maintain low dynamic stiffness not only under high-frequency micro-amplitude vibrations but also to provide a large damping angle under low-frequency large-amplitude vibrations, thereby effectively suppressing abnormal noises and improving in-vehicle quietness.

A frame supporting type air rib membrane structure system comprises a frame supporting structure, an air rib structure and a membrane structure. The frame supporting structure comprises a supporting unit; the supporting units are arranged at intervals in the longitudinal direction. The supporting unit comprises a stand column and a top support. The air rib structure is mounted on the outer side of the frame supporting structure and is formed by splicing a plurality of air rib type membrane structure units; each air rib type membrane structure unit comprises an air rib and a connecting pipe; the air ribs are arranged in parallel at intervals, and one group of air ribs are horizontally arranged; the group of air ribs are communicated with one another through connecting pipes to form one or more independent inflation loops; pressure sensors are arranged on the surfaces of the air ribs; and the membrane structure covers the outside of the air rib structure and is detachably connected with the air rib structure. The technical problems that a traditional gas film structure is small in application range, insufficient in stability, prone to being large in film surface deformation and unstable in gas rib are solved, and the technical problems that a traditional gas rib type film structure is poor in adjustment flexibility, large in operation difficulty and high in cost are further solved.

The present application relates to the technical field of structural design of construction engineering, and especially relates to a large-span roof tensile membrane structure and a design method thereof; the large-span roof tensile membrane structure comprises: no less than two non-draining boundaries and one draining boundary; the tensile membrane is tensiled between the non-draining boundaries and the draining boundary; the non-draining boundaries are located at the same elevation or different elevations; and the draining boundary is in a concave arch shape. The present application constructs a tensile membrane structure which does not rely on arches, cables, struts and other supporting members, forms a negative Gaussian surface by concave design of the membrane boundary, forms a draining path along the concave direction, and realizes organized drainage of the tensile membrane structure. Meanwhile, under the action of prestress, the membrane structure of the negative Gaussian surface has a structural rigidity which meets the use requirements. The corresponding design method can determine the size of the concave of the outer boundary of the tensile membrane based on the geometry of the roof structure of different shapes. The tensile membrane structure and the design method thereof proposed by the present application can avoid the influence and limitation of the traditional membrane structure modeling and internal supporting members on the architectural effect, maximize the realization of the demand for transparent and light architectural effect, and at the same time avoid water accumulation of the membrane structure.

The application discloses a kind of high-efficiency energy storage system and method based on bipolar membrane electrodialysis, including multiple series setting bipolar membrane stack combination unit, electrode system, electrolyte circulation system, control system and auxiliary equipment.The application utilizes the water dissociation characteristics of bipolar membrane and the ion migration mechanism of electrodialysis, realizes the efficient storage and release of electric energy, is suitable for renewable energy storage, power grid peak shaving and distributed energy system and other fields, and significantly improves energy conversion efficiency, prolongs system life and reduces operating cost by optimizing membrane structure, improving system design and control strategy.

The utility model discloses a back pressure type anti-corrosion device of a closed pressure vessel, which comprises a pressure vessel main body, an anti-corrosion and anti-corrosion film structure and a pressure control system, and the pressure vessel main body is divided into a working cavity and a balance cavity by the anti-corrosion and anti-corrosion film structure; the pressure control system controls the pressure difference value between the working cavity and the balance cavity to be not larger than 10 KPa. The pressure control system comprises an air pressure source, a first flow control valve, a second flow control valve, a third flow control valve, a pressure difference sensor and an electric control device, wherein the first flow control valve, the second flow control valve and the third flow control valve are used for controlling air flow; the differential pressure sensor is connected with the working cavity and the balance cavity. The air pressure source is communicated with the working cavity through a first flow control valve and is communicated with the balance cavity through a second flow control valve; the electric control device is used for receiving signals of the differential pressure sensor and controlling the air pressure source, the first flow control valve, the second flow control valve and the third flow control valve.

The invention provides a spoke type cable truss structure with a cable and a membrane cooperatively stressed. The spoke type cable truss structure comprises an upper inner pressing ring beam, a lower inner pressing ring beam, an outer pressing ring structure, a cable and membrane unit and a plurality of cable truss units distributed in the annular direction. Wherein each cable membrane unit comprises a plurality of folding surface membranes, a plurality of membrane ridge cables and a plurality of membrane valley cables, the membrane ridge cables and the membrane valley cables are alternately distributed, every two adjacent membrane ridge cables and the membrane valley cable located between every two adjacent membrane ridge cables are distributed in a V shape and form a membrane covering framework, and the folding surface membranes are laid on the membrane covering framework to form a tension cable membrane structure; each cable truss unit comprises a radial cable, a connecting rod and a plurality of suspension cables, the two ends of each radial cable are connected with the outer pressing ring structure and the lower inner pressing ring beam, the two ends of each connecting rod are connected with the upper inner pressing ring beam and the lower inner pressing ring beam, a triangle is defined by the membrane valley cables, the connecting rods and the radial cables, and the two ends of each suspension cable are connected with the membrane ridge cables and the radial cables. According to the invention, not only can complex folding surface geometric modeling be accurately adapted and the aesthetic property of the building be improved, but also the stress distribution is optimized through the synergistic effect of the cable and the film.

The utility model discloses an ion exchange membrane structure which comprises a main body membrane, the main body membrane is an ion exchange membrane with a rectangular structure, a fixing plate is arranged on the outer side of the main body membrane, and the fixing plate is a silica gel rectangular-ambulatory-plane plate with a rectangular structure; the ion exchange membrane structure comprises a fixed plate, the fixed plate is provided with a pair of reinforcing sealing plates, the pair of reinforcing sealing plates are annularly arranged on the outer edge of the fixed plate, and the pair of reinforcing sealing plates are used for clamping and fixing the fixed plate. The fixing plate is arranged on the periphery of the main body membrane in a combined mode to serve as an integral structure of the ion exchange membrane, the fixing plate is slightly thicker than the membrane main body and forms a membrane frame through the pair of reinforcing sealing plates, the reinforcing sealing plates and the fixing plate are mutually limited through the limiting grooves, and the pair of reinforcing sealing plates are oppositely buckled to fix the membrane main body. The ion exchange membrane is installed through limiting of the pair of reinforcing sealing plates and the pair of electrode frames, the structure is simple, and the ion exchange membrane is convenient to take and install.

The invention relates to the technical field of terminal sterilization and filtration in a radiopharmaceutical preparation process, in particular to a filter membrane sterilization and filtration device and system. Comprising the steps that a state sensing module collects liquid medicine radioactive activity data and filter membrane structure strain data and generates real-time data flow; the twinborn modeling module constructs a filter membrane digital twinborn body, and outputs an accumulated radiation damage prediction result through data assimilation; the prediction decision module generates a filtering parameter optimization sequence by using a deep reinforcement learning agent; the control execution module adjusts the flow velocity of the liquid medicine through fuzzy self-adaptive PID control and feed-forward compensation; and the verification feedback module performs an integrity test and transmits data back to the twin modeling module to realize model parameter correction. All the modules form a closed-loop control system through a high-speed data bus, so that the damage of radiation to a filter membrane material is effectively inhibited, and the integrity and the sterile guarantee level of a membrane structure in the filtering process are maintained.

It is planned that, at least in certain areas, electrode structures will be inserted between deformable membrane regions of membrane structures and a central electrode structure or a counter electrode structure located between two membrane structures. These additional electrode structures, i.e., the first and second electrode structures, will be attached to the support structures that mechanically connect the membrane structures and freely penetrate the central electrode structure, specifically at a distance from the deformable membrane regions of the membrane structures (i.e., the first and second membranes) and at a distance from the central electrode structure.

The application discloses a kind of wastewater comprehensive treatment equipment based on resin and membrane treatment, including processing jar, processing jar is hollow column, processing jar is provided with closed top cover, closed top cover is connected with inlet pipe, it is characterized in that, processing jar is processing cavity, the bottom of processing jar is provided with outlet pipe;Matrix arrangement is used to process jar to process batch water, and the water after pretreatment is treated by resin and membrane structure, and harmful ions are effectively filtered out, resin adsorption structure and membrane treatment structure of coaxial structure are built-in processing jar, and the osmotic pressure on one side of membrane structure treatment is increased by centrifugal force, on the one hand, the processing efficiency and effect are improved, on the other hand, through integrated structure, the effect of facilitating disassembly and assembly is achieved, and synchronous maintenance cycle is realized.

The present invention discloses a liquid impurity filtration, collection and analysis membrane, and relates to the technical field of impurity filtration membranes, the liquid impurity filtration, collection and analysis membrane comprises a filtration device main body, the interior of the filtration device main body is rotatably connected with a movable ring, the movable ring is provided with a filtration membrane, and the interior of the filtration device main body is provided with a movable mechanism. Liquid poured into the device can be collected and buffered by the collecting cylinder, so that the liquid is prevented from directly impacting the surface of a filter membrane for a long time, the filter membrane structure is prevented from being damaged for a long time, the filtering precision is ensured, meanwhile, the liquid is prevented from directly impacting the filter membrane at a high speed, and fine particles are prevented from being embedded into pores of the filter membrane to cause blockage of the filter membrane; meanwhile, the water outlet holes in different positions are formed in the bottom of the collecting barrel, and the water outlet holes are intermittently opened and closed, so that the liquid can be conveyed to different positions of the filter membrane through the different water outlet holes, a certain fixed part of the filter membrane is prevented from filtering the liquid all the time, and the filter membrane is prevented from being damaged.

The utility model discloses an online acoustic module with waterproof sound -transmitting membrane structure of quick replacement, including acoustic module main part, microphone FPA board, waterproof sound -transmitting membrane and magnetic formula fixing structure. The acoustic module main part is inlayed with first annular strong magnetic sheet at microphone FPA board fixed surface, and waterproof sound -transmitting membrane is compacted on FPA board through pressing plate, and the inlayed second annular strong magnetic sheet in pressing plate realizes quick dismounting with magnetic attraction principle. Module adopts the cooperation of positioning column and positioning hole to ensure installation accuracy, and is equipped with foamed silica gel O ring and is enhanced sealed dustproof performance. The handle of pressing plate design is convenient for operation, and the front shell adopts light weight aluminum alloy material to reduce acoustic interference. The utility model discloses through magnetic formula structure simplifies the replacement process of waterproof sound -transmitting membrane, improves maintenance efficiency, guarantees the stability and sealing property of connection simultaneously, and is applicable to the long -term reliable acoustic monitoring demand in industrial environment.

Membrane arrangement (1) comprising a membrane (7) that defines a volume space (5), a membrane body (9), characterized by a convex contact contour (12, 121) arranged adjacent to a transition area (16) from the membrane (7) to the membrane body (9) on an outer side (11) of the membrane order (1) facing away from the volume space (5), wherein the convex contact contour (12, 121) is provided by a ring (13, 117) surrounding the membrane body (9), wherein the ring (13) is designed separately from the membrane assembly (1) and engages in a groove (15) surrounding the membrane body (9) or wherein the ring (117) and the membrane assembly (1) are designed as one piece, and the ring (117) is at least partially embedded in the membrane body (9).

This utility model provides a membrane fixing node with a support cable, including a pipe frame with a pull plate on the pipe frame, a membrane support plate on the pull plate, a mounting hole on the pull plate, and a support cable connecting two connected pipe frames. The support cable is located below the membrane material. Its advantages include not only fixing the membrane structure but also preventing water accumulation and sagging of the membrane material, and allowing for the creation of various shapes.

This invention discloses a highly permeable MOF thin film, its preparation method, and its application. The preparation method includes the following steps: 1) depositing zinc carbonate nanosheets on the surface of a porous support; 2) calcining the porous support to obtain a porous support with a zinc oxide nanosheet layer deposited on its surface; 3) converting the zinc oxide nanosheet layer into an MOF film in the presence of an organic ligand, thereby obtaining the MOF thin film. This invention first deposits ultrathin zinc carbonate nanosheets on the surface of a porous support, then calcines them to form a loosely arranged, mechanically stable ultrathin zinc oxide nanosheet layer on the surface of the porous support. This layer is used as the zinc source for synthesizing the MOF film. The support is placed in an organic ligand atmosphere to induce the conversion of the zinc oxide nanosheets on the support surface into a MOF film. The resulting MOF film has a densely oriented membrane structure and exhibits no leakage or filling of the pores of the support.

The utility model relates to the technical field of membrane structures, and discloses a tensioning assembly of a membrane structure, which comprises a support bottom plate, a fixed sleeve is fixedly connected in the support bottom plate, and a support snap ring is fixedly connected in the support bottom plate. A ball sleeve and a supporting frame on the surface are driven by rotating a fixed sleeve and a lead screw in a supporting clamping ring to move back and forth in a distance adjusting sliding groove, and when a rotating connecting screw rod is taken out from the interiors of a limiting frame and a fixed clamping plate, one end of a product is wound on a second limiting rod; a handle is pulled to drive a fixing clamping plate to be clamped to the front face of a limiting frame, then fixing is conducted in cooperation with a connecting plate and a connecting screw rod, the other end of a product is wound to the surface of a first limiting rod, and fixing is conducted in cooperation with a limiting clamping block and a fixing screw rod; and the operation is convenient when a worker carries out a tension test on a product.

The biosensor system is configured to establish a steady-state condition and alternate between the steady-state condition and a non-steady-state condition to determine an analyte concentration. The biosensor system includes an electrode system having at least one working electrode and one counter electrode. The working electrode is coated with an analyte catalyst layer for converting the analyte to a measurable species. A membrane system surrounds the electrode system and includes an analyte-permeable membrane. The membrane has an analyte permeability with an analyte solubility lower than the analyte solubility outside the membrane. The membrane is configured to capture the measurable species within the membrane such that a steady state of the measurable species generated from the analyte is established near the electrode surface. The bias circuit is configured to apply a potential modulation sequence to the working electrode to induce alternating steady-state and non-steady-state conditions within the electrode system for determining the analyte concentration.

The utility model discloses a high-temperature-resistant and high-pressure-resistant industrial planar pH electrode with a diameter structure of 10mm. The high-temperature-resistant and high-pressure-resistant industrial planar pH electrode comprises an electrode shell (1), an electrode inner glass tube (5), a reference electrolyte (2), an open type liquid complexing part (3), a ceramic sand core liquid complexing part (4), a large-diameter flat membrane (6), an electrode inner reference solution (7), an Ag / AgCl reference electrode (8) and a reference system (9), an open liquid complexing part (3) and a ceramic sand core liquid complexing part (4) are arranged at one end of the electrode shell (1) and form a double-liquid complexing part structure, so that the pressure of the electrode is kept balanced in a high-temperature and high-pressure environment; and the large-diameter flat film (6) is fixed at the inner end of the electrode shell (1) and is manufactured by adopting a thick film, and the diameter of the large-diameter flat film (6) is 10mm. The electrode adopts a large-diameter membrane structure, so that the membrane impedance is effectively reduced under the condition that the requirement of measurement on the electrode structure is met.

A force-measuring device suitable for measuring the wave impact force on a floating photovoltaic buoy in a laboratory setting, relating to the field of marine photovoltaic power generation technology. It includes a perforated cover, stress ropes, plastic baffles, an elastic membrane structure, stress rope connection points, a vent valve, compressible fluid, and a fluid pressure sensor. The elastic membrane structure is semi-cylindrical, with its two semi-circular bases and rectangular face bonded to the plastic baffles and further reinforced by stress ropes. One side of the semi-circular bases on the two sides of the elastic membrane structure has a perforated cover, and the other side has a vent valve. The interior of the elastic membrane structure contains compressible fluid and includes a fluid pressure sensor for measuring pressure changes in the compressible fluid and transmitting the data to an external data acquisition device. The force-measuring device is connected to the photovoltaic buoy via stress ropes and reflects the average pressure generated by the wave force on the buoy by outputting changes in the internal fluid pressure.

The utility model relates to the technical field of wastewater treatment, and discloses a membrane structure wastewater treatment device which specifically comprises a device body, a fixed frame I, a fixed frame II, a cleaning structure, a rotating frame, a filter screen and a protective screen, the sweeping structure comprises a first scraper blade, the other end of the first scraper blade is connected with a connecting block through a second hydraulic telescopic rod, the outer ring of the other end of the connecting block is movably connected with a sweeping brush, the other end of the connecting block is connected with a second scraper blade through a third hydraulic telescopic rod, and the sweeping brush is located between the first scraper blade and the second scraper blade. According to the membrane structure wastewater treatment device, through the arrangement of the cleaning structure, when the cleaning structure is used, impurities adhering to the inner wall of the filter screen can be scraped off firstly, then the cleaning brush is used for brushing off the impurities adhering to meshes of the filter screen, the cleaning effect of the filter screen is improved, the cleaning structure can push the impurities into the collecting frame, cleaning of the impurities is facilitated, and the cleaning effect is improved. And the influence of the swept impurities on the use of the filter screen can be avoided.

This utility model relates to the field of heat exchanger technology and discloses a PTFE-graphene composite membrane heat exchanger, including a heat recovery core. The heat recovery core comprises several honeycomb flow channel cores spliced ​​together, each of which adopts a graphene-PTFE composite membrane structure. The honeycomb flow channel core is set at a 15° inclination angle relative to the primary air inlet. The graphene-PTFE composite membrane structure, from the inside out, includes a graphene inner coating, a PTFE microporous base membrane layer, and a SiO2 nano-hydrophobic layer fixed together. The hexagonal honeycomb flow channel core of the graphene-PTFE composite membrane structure and the 15° inclination improve heat exchange efficiency and gas handling capacity. The turbulence control strategy further enhances the system performance, improves sensible heat efficiency, avoids water accumulation and frost formation, and makes the system more stable and efficient.

A feeder synchronous film stretching structure and feeder include a film release mechanism and a synchronous electronic control device mounted on the main body. The film release mechanism includes a fixed shaft A, a fixed shaft B, a film stretching fixed gear, a film stretching movable gear, a tension spring, an adjusting nut, an adjusting bolt, and a film stretching movable gear bracket. It is characterized by further including a film stretching motor connected to a worm gear; the worm gear meshes with the film stretching fixed gear for transmission; the adjusting nut and the film stretching movable gear are mounted on the film stretching movable gear bracket; one end of the tension spring is fixed to the other end of the main body and to an adjusting screw located inside the adjusting nut; under the synchronous control mode of the film stretching motor and the feeding motor, precise movement of the film and feed belt is achieved, featuring a simple and reliable structure, and enabling stable feeding of the pick-and-place machine.

The invention discloses a laser plate shearing machine for film structure shed production, which comprises a rack, a driving motor, a plate transmission part, a plate shearing part and a plate cooling part, the rack comprises an upper rack and a lower rack, the driving motor is fixedly mounted on the lower rack, and an output shaft of the driving motor is coaxially and fixedly connected with a half gear; the plate conveying part is composed of a first rotating roller, a second rotating roller and a conveying belt and used for conveying the shed plate, and the first rotating roller and the second rotating roller are symmetrically and rotationally connected to the upper end of the upper rack. By arranging the half gear on the output shaft of the driving motor, through the first transmission assembly and the second transmission assembly, transmission and laser cutting actions of the car shed plate are precisely synchronized, fixed-length cutting can be completed without manual timing operation, the labor intensity of workers is greatly reduced, errors caused by manual operation are effectively avoided, and the working efficiency is improved. And the requirements of industrial mass production on consistency and precision are met.

The application relates to the technical field of filtering devices, in particular to a medical filter and a preparation method thereof. The filter comprises a shunt assembly, an inlet liquid filter membrane and an outlet liquid filter membrane. The inlet liquid filter membrane and the outlet liquid filter membrane are arranged on the two sides of the shunt assembly and form a first liquid passing cavity supported by the shunt assembly. The inlet liquid filter membrane and the outlet liquid filter membrane are arranged on the two sides of the shunt assembly to form two-stage filtering channels. The liquid medicine is primarily filtered through the inlet liquid filter membrane, uniformly dispersed through the cavity supported by the shunt assembly, and secondarily filtered through the outlet liquid filter membrane. The double-membrane structure is filtered twice, the impurity interception capacity is obviously enhanced, and the stability of the filter during intermittent work is effectively improved.