97results about How to "Easy to filter" patented technology

The invention relates to a fence, in particular to an aquaculture fence. In order to solve the technical problems, the aquaculture fence which can save time and is beneficial for screening is provided. The aquaculture fence comprises an installation plate, supporting columns, a guide plate, first connecting plates, a first baffle, a second baffle and the like, wherein the supporting columns are installed on the left side and the right side of the top of the installation plate respectively, the tops of the two supporting columns are connected with the guide plate, a first strip-shaped opening with a guiding effect is formed in the top of the guide plate, a second strip-shaped opening is formed in the rear side of the guide plate and communicated with the first strip-shaped opening, and thetwo first connecting plates are connected between the two supporting columns. Through the effect of the second baffle and the second baffle, fish fry small in size can be screened and does not need tobe fished up by people or screened by people with naked eyes, and therefore screening can be convenient and time can be saved.

The utility model discloses an impurity removing device for a gasoline engine type peanut picker, which comprises a peanut picker body, a first collecting box for collecting peanuts is arranged on the peanut picker body, a material conveying mechanism is arranged at the side end of the peanut picker body, the material conveying mechanism is communicated with the inside of the first collecting box through a first connecting pipe, and a second connecting pipe is arranged at the side end of the first collecting box. The peanut picker comprises a peanut picker body, an impurity removal box is installed on the peanut picker body, two impurity removal grooves are formed in the impurity removal box, filter screen plates are installed at the positions, corresponding to the two impurity removal grooves, of the bottom end of the impurity removal box, a first rotating shaft is rotationally connected to the interior of the impurity removal box, and a first motor for driving the first rotating shaft to rotate is installed on the impurity removal box; and discharging openings are formed in the positions, corresponding to the two impurity removing grooves, of the side end of the impurity removing box, and a box cover is installed at the top end of the impurity removing box, so that peanuts in the impurity removing grooves are conveniently stirred, the peanuts are prevented from being accumulated on the filter screen plate, and the peanut impurity removing effect is guaranteed.

The utility model belongs to the technical field of motor manufacturing, and particularly relates to magnetic ring and casing assembling equipment, which comprises a casing carrying mechanism, a feeding position, a gluing position and a transfer position are sequentially arranged along a carrying path of the casing carrying mechanism, and a casing output from the feeding position is carried to the gluing position for gluing; the machine shell gluing mechanism is close to the gluing position and comprises a gluing execution assembly used for gluing the machine shell and a visual detection assembly used for detecting the gluing result, and when the detection result of the visual detection assembly is qualified, the machine shell carrying mechanism carries the glued machine shell from the gluing position to the transfer position; the rotating mechanism is provided with a plurality of installation parts in the circumferential direction, and a magnetic ring pushing position, a machine shell transferring position and a press-fitting position are sequentially arranged on the rotating path of the rotating mechanism. And the magnetic ring pushing mechanism is arranged at the magnetic ring pushing position and is used for pushing the magnetic ring to the mounting part. According to the magnetic ring press-fitting machine, automatic press-fitting of the magnetic ring and the machine shell can be achieved, the gluing uniformity of the machine shell is ensured, and the press-fitting concentricity of the magnetic ring and the machine shell is ensured.

The invention relates to the technical field of organoid culture, in particular to a pulmonary fibrosis organoid model and a construction method and application thereof. The pulmonary fibrosis organ-like model is obtained by co-culturing lentivirus stably transfected alveolar epithelial cells, human embryonic lung fibroblasts MRC-5 and macrophages. According to the invention, macrophages are innovatively introduced, a ternary co-culture system of lentivirus stably transfected alveolar epithelial cells, human embryonic lung fibroblasts MRC-5 and macrophages is constructed, and a key'epithelial injury-immune infiltration-fibroblast activation 'pathological triangle in a pulmonary fibrosis pathogenesis process can be more comprehensively simulated; the finally obtained pulmonary fibrosis organ-like model provides an efficient tool for pulmonary fibrosis mechanism research and research, development and screening of anti-pulmonary fibrosis drugs.

The application provides a construction of a fluorescent protein labeled microtubulin and a microtubule binding protein universal bivalent carrier, and the process is as follows: a first stage is to construct a GFP-alpha tubulin carrier, and a second stage is to construct a GFP-alpha tubulin-mCherry universal bivalent co-expression carrier; in the second stage, 35S, mCherry and NOS sequences are inserted into a KpnI enzyme cutting site of a multiple cloning site of the GFP-alpha tubulin carrier constructed in the first stage, and a single nucleic acid enzyme cutting site is inserted into the 5' end and the 3' end of the mCherry sequence, respectively, and the single nucleic acid enzyme cutting site is XbaI, KpnI / Acc65I and AscI sequences, respectively, so as to obtain the universal bivalent carrier. The universal bivalent carrier provided by the application can express two target genes simultaneously, has the fluorescent signals of GFP and mCherry, can quickly and accurately identify a transgenic plant, is convenient for positive seedling screening, can be used for a tobacco transient expression experiment, can shorten an experimental period, and saves time and effort.

This utility model relates to the technical field of silicon carbide tail gas treatment, and discloses a three-stage purification system for industrial tail gas from silicon carbide production. The system includes a sealed gas collection hood, a gas settling chamber, a bag filter, and a cooling scrubbing tower. A primary filter is installed in the gas settling chamber, and a drain trough is provided at the bottom of the chamber, with a sealing component at the lower end. A cooling and cleaning component is installed inside the cooling scrubbing tower. In this three-stage purification system for industrial tail gas from silicon carbide production, gas is introduced into the gas settling chamber through the sealed gas collection hood and high-pressure sealed pipeline for the removal of large particles. The filtered solid impurities can be discharged through the drain port at the lower end of the gas settling chamber for easy cleaning. Further dust removal is achieved through the bag filter, and the cooling and cleaning component in the cooling scrubbing tower allows for the cooling of circulating water before discharge.

The utility model relates to the technical field of mandarin orange planting, and discloses a seed screening device for mandarin orange planting, which comprises a screening cylinder, a concave disc is fixedly connected with an inner cavity of the screening cylinder, the bottom of the concave disc is communicated with a discharge pipe, a screening net is annularly embedded at the top of the concave disc and is positioned on the outer side of the discharge pipe, and the screening net is communicated with the discharge pipe. By arranging the screening cylinder, the concave disc, the discharging pipe and the screening net, seeds can be conveniently screened, by arranging the rotating shaft, the conical disc, the brush plate, the storage cylinder, the discharging pipe and the driving assembly, the seeds can be conveniently screened, and the screening efficiency is improved. By means of the structure, seeds can be evenly thrown, fed and screened conveniently, the screening net can be cleaned conveniently, the situation that full seeds block the screening net and influence normal screening use is avoided, through the arrangement of the structure, cleaning and feeding use can be facilitated, and therefore the use requirements of customers can be met.

The utility model discloses a low noise composite gas filter relates to gas filter technical field, the inside of filter main part is provided with first filter screen and second filter screen from left to right, and the inside of filter main part is provided with second slowing down disk between first filter screen and second filter screen, and second slowing down disk is provided with second slowing down disk between first filter screen and second filter screen. A first speed reduction disc is arranged at the position, on one side of the first filter screen, in the filter body, and a sound insulation mechanism is arranged outside the filter body and comprises a first sound insulation cover and a second sound insulation cover which are arranged outside the filter body from top to bottom; a sound insulation pad is arranged at the joint of the first sound insulation cover and the second sound insulation cover, a positioning block is arranged on the lower surface of the first sound insulation cover, and a positioning groove is formed in the upper surface of the second sound insulation cover. The sound insulation mechanism is arranged outside the filter main body, and the purposes of sound insulation and noise reduction can be achieved for the filter main body through the first sound insulation cover and the second sound insulation cover in the sound insulation mechanism.

The utility model provides a kind of drinking water system for cowshed belongs to the technical field of livestock breeding, including drinking trough, the valve for controlling drainage is connected to the drinking trough;Collecting filter tank, the drain pipe of the collecting filter tank with the drinking trough is communicated, filter hole is arranged in the bottom of the bottom of the collecting filter tank, backflushing water gun is arranged on the collecting filter tank, the water outlet end of backflushing water gun is inserted into the inner chamber of the collecting filter tank;Filter tank, the filter tank is located below the collecting filter tank, for collecting the water falling of filter hole;Backflow pool, the backflow pool is communicated with the filter tank, and the backflow pool is communicated with the drinking trough by pump body. By the residual water in several drinking troughs through the collecting filter tank and the filter tank filtration, by backflushing water gun reverse flushing the bottom of the collecting filter tank, so that the filter hole can ensure that it can filter feed residue and straw residue, and avoid filter feed residue and straw residue to block filter hole.

The utility model relates to the technical field of hot riveting machines, in particular to a feeding and screening structure for an ultrasonic hot riveting machine, which comprises a support, a workbench is arranged on the upper side of the support, the ultrasonic hot riveting machine is arranged on the upper side of the workbench, a conveyor is arranged on one side of the ultrasonic hot riveting machine, and guide plates are respectively mounted on two sides of the conveyor. A groove is formed in the middle of one guide plate, an induction push plate is arranged on the side, close to the groove, of the guide plate, an electric telescopic rod is arranged on one side of the induction push plate, and a screening machine is installed on the upper side of the other guide plate. According to the ultrasonic hot riveting machine, feeding is conducted through the concave conveyor, screening is facilitated through the screening machine, unqualified products are conveniently pushed into the material receiving box through the induction push plate driven by the electric telescopic rod, screening is facilitated, lighting is conducted through the lighting lamp, and the feeding convenience of the ultrasonic hot riveting machine is conveniently improved.

The utility model relates to a crushing device for recycling plastic parts, which comprises a crushing box, a filter box is fixedly mounted at the bottom of the crushing box, a support frame is fixedly mounted at the bottom of the filter box, and a pushing component and a crushing component are movably mounted in the crushing box. According to the crushing device for recycling the plastic parts, by arranging a material pushing assembly, when an output shaft of a hydraulic lifting rod shrinks, a driving motor is further driven to descend through a connecting plate, so that a sleeving rod and a lifting plate are driven to descend through the connecting plate, and after the lifting plate is far away from the bottom of the crushing box, crushed plastic parts in the crushing box fall into a filtering box; and by starting a driving motor, an output shaft of the driving motor drives a first gear and a second gear to be meshed with each other, so that an inserting rod and a rotating plate are driven to rotate, the plastic is pushed to a filter screen to be filtered, and the plastic is conveniently screened.

The invention discloses an intelligent detection system and method for coating color flaws and defects, and the method comprises the steps: selecting a standard sample, and creating a color code model based on a machine vision system; stacking and feeding, and conveying to a visual inspection station one by one; coating image information of all products in each tray is sequentially collected based on a machine vision detection system; feature parameters in the image information are extracted, and color flaws and defects of each to-be-detected product in each tray are compared and judged according to a color code model; marking unqualified products, and outputting a judgment result; and stacking and blanking. According to the invention, accurate quantification of coating colors of industrial products is realized, the defect of subjective judgment of human eyes is avoided, the detection efficiency and the defect identification precision are high, the manual dependence is reduced, the operation is convenient, mass production and full detection can be realized, and the pain point that manual detection and spectrograph detection cannot adapt to mass production is solved; and all microscope base product detection data in the corresponding charging tray can be called by identifying the identity information of the charging tray through the two-dimensional code, so that whole-course traceability is realized.

The invention provides a log analysis method and system based on a large language model, and belongs to the technical field of log analys.The method comprises the steps that anti-fact rewriting is conducted on a to-be-analyzed log, and multiple log variants are obtained; log parameters are extracted from the log variants through the large language model to serve as intermediate variables, and the confidence coefficient of each intermediate variable is determined; performing correctness scoring on each intermediate variable based on statistical information of a historical log corpus knowledge base; determining a comprehensive score of each intermediary variable according to the confidence coefficient of the intermediary variable and the correctness score of the intermediary variable; and screening the medium variable with the highest comprehensive score as a log parameter of the log to be analyzed, and generating a log template of the log to be analyzed according to the log parameter of the log to be analyzed. According to the log analysis method, the stable semantic structure of the log can be more emphasized in the log analysis process, and the accuracy and generalization ability of log analysis are improved.

The application is suitable for the field of silicon-based radio frequency and millimeter wave integrated circuit technology, and provides a satellite distributed configuration numerical control unit, a micro single sheet and an antenna unit, which comprises a decoupling capacitor module, a main control module and a distributed satellite module; the positive electrode of the decoupling capacitor module and the power supply pin of the main control module are connected with the power supply pin of the numerical control unit, and the negative electrode of the decoupling capacitor module and the ground pin of the main control module are connected with the ground pin of the numerical control unit; the distributed satellite module comprises a first satellite sub-module, a second satellite sub-module, a third satellite sub-module and a fourth satellite sub-module, and the connection mode of the first satellite sub-module with the main control module, the connection mode of the second satellite sub-module with the main control module, the connection mode of the third satellite sub-module with the main control module and the connection mode of the fourth satellite sub-module with the main control module are the same. The numerical control unit has the bandwidth universality suitable for various microwave bands and the universality suitable for various semiconductor manufacturing processes.

The invention discloses a circulating tumor cell physicochemical screen and application thereof. The circulating tumor cell physicochemical screen comprises a body, a reaction tank is arranged in the body, at least two liquid inlets are formed in one end of the reaction tank, a liquid outlet is formed in the other end of the reaction tank, a plurality of reaction areas are arranged between the liquid inlets and the liquid outlet, and a plurality of micro-columns are arranged in each reaction area; along the direction from the liquid inlet to the liquid outlet, the distance between the micro-columns in each reaction area is gradually reduced. The circulating tumor cells are sorted in a mode of combining physical blocking and chemical adsorption, the distance between the microcolumns in each reaction area is gradually reduced, screening of the CTC cells is facilitated, further observation and judgment are also facilitated, compatibility to various coloring agents is good, and the application range is wide.

The invention discloses a photovoltaic energy storage integrated device based on a zero-carbon park, which comprises a support system, the support system comprises a middle assembly frame and side assembly frames arranged on the two sides of the middle assembly frame, and photovoltaic cell panels are mounted on the middle assembly frame and the side assembly frames through movable clamping devices. The invention relates to the technical field of photovoltaic power generation devices, and has the beneficial effects that the device is fixed in a zero-carbon park through a bracket system, a plurality of movable clamps can be mounted on the device, so that a plurality of photovoltaic cell panels are densely arranged, the space is saved, the space utilization rate is improved, once the photovoltaic cell panel fails, the movable clamps on the device work, and the photovoltaic cell panel cannot be damaged. The movable loading and unloading device and the supporting device are matched with each other, the fault board can be fixed, the fault board can be transversely conveyed to one side of the support system, and the operation space of the workers is enlarged.

The utility model relates to the technical field of shield tunneling machines, in particular to a tunnel green construction shield tunneling machine earthwork conveying mechanism which comprises a body, the top of the body is fixedly connected with a conveying assembly, and the interior of the body is fixedly connected with a filtering assembly. A conveying mechanism composed of the conveying frame, the electric control actuator, the gear set and the rollers can convey a single material with large weight or bear large impact load, a gap exists between every two rollers, connection and filtering are easy, accumulation and conveying of the materials can be achieved through the accumulation rollers, and the conveyor is simple in structure, convenient to operate and low in cost. The device is simple in structure, high in reliability and convenient to use and maintain, moisture and waste residues of square blocks dug by the shield tunneling machine can be filtered by utilizing the advantage that the rollers are easy to connect and filter, convenience is provided for transportation and accumulation of the square blocks, the tidiness of stacking and accumulation is improved, and meanwhile the situation that the square block conveying efficiency is affected due to accumulation of the waste residues in the conveying process is avoided.

The utility model relates to the technical field of vegetable cleaning equipment, in particular to an agricultural drum screen with spraying and cleaning functions. According to the technical scheme, the device comprises a base, a turnover mechanism and a rotary screen, a discharging barrel is arranged on the base, the rotary screen is movably connected to the discharging barrel, the turnover mechanism is arranged on the side, close to the rotary screen, of the base, a first guide groove and a second guide groove are formed in the surface of the rotary screen, and the turnover mechanism is matched with the first guide groove and the second guide groove; a driving motor is started, through transmission of a synchronous belt, a second synchronous wheel rotates along with a first synchronous wheel, a rotating rod is driven to rotate under supporting of a bearing seat, a guide wheel of the rotating rod rolls along a first guide groove and a second guide groove of a rotary screen, and agricultural material screening and follow-up cleaning are facilitated; and water of external water supply equipment is conveyed to the rotating gear disc through the corrugated hose and is sprayed out by the spraying head, so that the rotary screen and the materials are cleaned.

The application discloses a Sepic type power correction circuit based on a switched inductor, which comprises switching tubes S1-S3, diodes D1-D5, inductors L1-L5, capacitors C1 and C o The diodes D3-D5 and the inductors L4 and L5 form a switched inductor structure, and the voltage gain of the converter is D / (2-D). Compared with a conventional Sepic PFC converter, the Sepic type power correction circuit based on the switched inductor improves the step-down gain, ensures that the whole duty cycle range is in a step-down state, and has a larger duty cycle than the conventional Sepic PFC converter in the case of a high step-down ratio, thereby effectively avoiding the emergence of a limit duty cycle. The no-bridge structure can realize lower conduction loss. The original output diode is replaced by the switched inductor structure, so that the output current is continuous, and the output current can be filtered. All the switching tubes are common ground, and a lower-cost driving circuit can be used.

The utility model relates to soil collection technical field, concretely is a kind of sampling separator of solid waste in soil.The separator includes chassis, the support ring of sliding connection in chassis, the annular guide rail of clamping in support ring, the grid net fixed in annular guide rail and the soil turning mechanism through grid net.The soil turning mechanism contains support disc, transmission shaft and overturning assembly with arc-shaped turning plate, and power mechanism drives transmission shaft to drive arc-shaped turning plate revolution and rotation soil turning.Vibrator drives support ring vibration to make soil screen through grid net, and solid waste is retained on the screen face.Sliding plate can be designed as triangular, trapezoidal or semicircular metal sheet, and slidingly connected with annular guide rail.Separate solid waste through soil turning and vibration synergistic effect, avoid soil state change, improve detection accuracy.

The utility model discloses an engineering plastic preparation stirring structure, relates to engineering plastic stirring technical field, including barrel body and barrel cover, the middle part of barrel cover upper surface is fixedly connected with motor no. 1, the left side of barrel body outer surface upper side is fixedly connected with feed pipe, the upper end of feed pipe is fixedly connected with feed box, and the feed box is fixedly connected with the motor no. And a discharging pipe is fixedly connected below the right side of the outer surface of the barrel body in a penetrating manner. A barrel cover is detached, then a mounting column is moved upwards by a worker to drive a rhombic inserting block to be separated from the interior of a rotating shaft, after detachment, a stopping block is rotated to be separated from the interior of a limiting groove, a cam is rotated to be separated from the surface of a U-shaped base, and a connecting block can move on the surface of a fixing shaft; and through the arrangement of the structure, the stirring structure and the barrel body have the characteristic of being separated, disassembly and cleaning are convenient, and the effect that the stirring structure and the barrel body are convenient to store after being disassembled is achieved.

This utility model discloses a flexible cable connection device with a sealing structure, belonging to the technical field of cable connection devices. It includes an upper housing and a lower housing installed at the bottom of the upper housing. Both ends of the upper housing are fixedly connected to pressure rings, and a sealing gasket A is adhered to the inner surface of the pressure ring. When connecting two adjacent cables, the cables are first installed and fixed, then inserted into the interior of the lower housing. The upper housing is pressed down relative to the lower housing, and the upper housing is inserted into the mounting platform. The insertion end of the upper housing extends to the surface of the rubber frame. Positioning cylinders are symmetrically installed on the inner surface of the upper housing, and positioning posts are symmetrically installed on the inner surface of the lower housing. During insertion, the positioning posts and positioning cylinders are inserted into each other, thus the rubber frame improves the sealing performance at the connection between the upper and lower housings. The sealing gasket A of the pressure ring and the sealing gasket B of the support ring adhere to the outer surface of the cable, providing excellent sealing and good waterproof and seepage-proof performance.

The utility model discloses a raw material rotating disc type sorting machine, which belongs to the technical field of sorting machines and comprises a screening cylinder, a third screening plate, a second screening plate, a first screening plate, a large screening hole, a medium screening hole and a small screening hole. According to the screening device, the large screening holes, the medium screening holes and the small screening holes are in a vertical state from top to bottom, so that raw materials capable of passing through the small screening holes in the first screening plate can fall down to be collected, the raw materials conforming to the large screening holes fall above the second screening plate, and the raw materials conforming to the medium screening holes fall above the first screening plate; at the moment, the first screening plate is rotated to enable the small screening holes in the first screening plate to be changed into the medium screening holes, so that the raw materials above the first screening plate can be discharged downwards and collected, the first screening plate is rotated again to enable the medium screening holes to be changed into the large screening holes, and the second screening plate is rotated to enable the medium screening holes in the second screening plate to be changed into the large screening holes.

The application relates to a box cargo fan-shaped upper shelf system, which comprises a device module and a general control module for controlling the device module, the general control module comprises a control module, a fan-shaped upper shelf analysis module, a depth marking module and a threshold control module, the device module comprises a mechanical arm module, a stacking module and a shelf module, the shelf module comprises a plurality of shelves, and different shelves are divided into a shelf A and a shelf B based on shelf positions, and the division of the shelves can be selected based on information of the box body and divided into multiple kinds; the application has the advantages of improving the warehouse-out efficiency and self-lubrication of the stacking machine.

The application discloses a microphone array sound pickup method, electronic equipment and computer readable storage medium. The sound pickup method comprises the following steps: fixed beam forming is performed on a voice signal received by a microphone array, and a beam forming direction of the microphone array is pointed to an estimated expected direction of arrival; blocking processing is performed on the processed voice signal, so that the voice signal from the expected direction of arrival is blocked, and only the voice signal from a non-expected direction of arrival is reserved; the processed signal is used as a reference signal, a first filter is used to filter out the signal from the non-expected direction of arrival and reserve the signal from the expected direction of arrival; and an update factor of the first filter is calculated according to the following formula (I), wherein the update factor of the first filter of the mth microphone channel is SNR f,d (ω, l) is Y f,d (ω, l) is a signal-to-noise ratio of Y f,d (ω, l) is a delay signal obtained by delaying the signal processed in the step S1, SNR m (ω, l) is a signal U m (ω, l) is a signal-to-noise ratio of Y. The application further improves voice quality.

The application discloses a PSAP-3 protein fragment and application thereof in human echinococcosis. The polypeptide comprises an amino acid sequence as shown in SEQ ID NO:1, SEQ ID NO:2, SEQ ID NO:3 and SEQ ID NO:4. The application further discloses a recombinant protein or a mutation thereof, wherein the recombinant protein comprises an amino acid sequence as shown in SEQ ID NO:5, and the amino acid sequence of the mutation has at least 80% identity with the amino acid sequence of the recombinant protein. The immunoreaction rate of the PSAP-3 recombinant protein of the application is 100%, the echinococcosis can be effectively detected, the positive detection rate is 96%, the negative detection rate is 90%, and the positive patient that cannot be detected by Egr can be detected.

The utility model relates to the technical field of bean curd production, and disclose a kind of suction equipment for bean curd production, including bearing table, the lower end of bearing table is fixedly arranged with support bottom mat, and one end of bearing table is fixedly arranged with anti-collision strip, and the upper end of bearing table is fixedly arranged with suction treatment box, and the upper end of suction treatment box is fixedly arranged with extension frame, and the inside of extension frame is fixedly arranged with storage tank, and one end of storage tank is movably arranged with movable disc, and one end of movable disc is fixedly arranged with movable vane.The suction equipment for bean curd production, by the improvement of production suction equipment, the suction treatment and grouting capacity of the production suction equipment are improved, in the actual use process of the production suction equipment, the bean curd raw materials can be suction filtered according to the needs, the bean curd raw materials are conveniently grouted, and the bean curd production effect of the suction equipment for bean curd production is improved.

The utility model relates to the technical field of chicken powder feed production, in particular to a screening and drying machine for chicken powder feed production, which comprises a drying box with a feed port and a discharge port at the top and the bottom respectively, a heating mesh enclosure communicated with the feed port is fixedly mounted in the drying box, and a shifting plate is rotatably connected in the heating mesh enclosure. A follow-up vibration mechanism capable of moving along with rotation of the material stirring plate is arranged outside the heating mesh enclosure, and a left-right swing driving mechanism for driving the material stirring plate to rotate and swing left and right is arranged on the drying box. The screening and drying machine for chicken powder feed production guarantees normal operation of the next procedure of chicken powder, reduces cost and is easy and convenient to operate.

The application discloses a bridgeless Cuk PFC converter based on a switched-inductor-capacitor structure, which comprises switching tubes S1-S3, diodes D1-D4, inductors L1-L5, capacitors C1, C2 and C o The diodes D3 and D4, the capacitor C2 and the inductors L3 and L4 form a switched-inductor-capacitor structure. The original freewheeling diode is replaced by the switched-inductor-capacitor structure, so that the voltage gain of the converter is D / 2(1-D), compared with a traditional Cuk PFC converter, the converter realizes positive voltage output and improves the voltage reduction gain, and the duty cycle range in the voltage reduction mode is wider. Meanwhile, the bridgeless structure is adopted, so that lower on-state loss can be realized. The converter has continuous input and output currents, high power factor and high efficiency, and has rich application.

The utility model relates to the technical field of aluminum-clad steel wire processing, and discloses an aluminum-clad steel wire screening device which comprises a bottom plate, a vertical plate is connected to the upper end of the bottom plate, a through hole is formed in the side wall of the vertical plate, a rotating shaft is rotationally connected to the side wall of one side of the vertical plate, and a screening disc is connected to the other end of the rotating shaft. A plurality of screening holes with different diameters are annularly and evenly formed in the side wall of the screening disc at equal intervals, the through holes correspond to the corresponding screening holes in position, a lead screw is rotationally connected to the side wall of one side of the vertical plate, a movable block is in threaded connection with the rod wall of the lead screw, one end of the movable block is connected with a rack, and the shaft wall of the rotating shaft is fixedly sleeved with a gear. And the rack is meshed with the gear. According to the technical scheme, through mutual cooperation of the bottom plate, the vertical plate, the through holes, the rotating shaft, the screening disc, the screening holes, the lead screw, the movable block, the rack, the gear and other structures, the screening holes can be replaced, aluminum-clad steel wires of different diameters can be screened conveniently, and therefore the applicability of the device is improved.