111results about How to "Reduce retention" patented technology

The invention discloses an anion exchange membrane electrode and a preparation method and application thereof, and belongs to the technical field of new energy material and catalytic electrode preparation, the method comprises the following steps: S1, preparing an anode catalyst slurry comprising a hydrophobic covalent organic framework material, an anode catalyst, an anion exchange ionomer and a solvent; s2, preparing a cathode catalyst slurry of which the components comprise a cathode catalyst, an anion exchange ionomer and a solvent; and S3, respectively spraying or coating the anode catalyst slurry and the cathode catalyst slurry on two side surfaces of an anion exchange membrane or a gas diffusion layer, and carrying out heat treatment to obtain the anion exchange membrane electrode. The method provided by the invention can solve the problems of large gas-liquid-ion three-phase mass transfer resistance, easy shielding of active catalytic sites by ionomers and unbalanced water management in the membrane electrode assembly in the existing AEMWE device.

This utility model discloses a universal filter for amination reactions, belonging to the field of filter technology. The filter includes a tank, a cover, and a filter basket. A first pipe is connected to the tank, and a second pipe is connected to the cover. The filter basket divides the internal space of the tank into a first working space and a second working space. The filter basket includes an annular plate and a bottom plate, with a receiving container on the bottom plate. Liquid in the first working space enters the second working space after being filtered by the filter basket. The receiving container protrudes towards the second working space. This utility model, by providing a receiving container on the filter basket, facilitates the collection of some trapped particles, reduces particles retained on the filter basket, reduces the possibility of particles getting stuck in the filter holes, and reduces the frequency of the filter basket needing to be removed for cleaning. A baffle covers the receiving container, reducing the direct impact of the liquid flow on the internal cavity of the receiving container. The baffle and connecting rod are detachably connected, facilitating the collection of particles inside the receiving container.

The utility model provides a coal bucket anti-blocking structure of a coal conveying system, which relates to the field of coal conveying systems and comprises a coal bucket body, the coal bucket body is divided into a plurality of inclined sections and vertical sections which are alternately arranged, and a vibration component is mounted on the outer side of the coal bucket body. The vibration assembly comprises a plurality of vibration balls, a gear ring driving the vibration balls to rotate and a plurality of vibration plates used for transmitting vibration, the vibration balls make contact with the vibration plates in the rotating process, and the vibration plates extend to the inner side of the coal bucket body. The friction force superposition effect caused by the continuous conical section can be reduced, so that the blocking phenomenon of coal particles is effectively reduced, the vibration plate is knocked by the vibration ball, the vibration plate and the coal bucket body are continuously vibrated, retention of the coal particles on the inner wall of the coal bucket due to extrusion friction can be effectively reduced, blocking is prevented, and the service life of the coal bucket is prolonged. And continuous and coherent coal conveying operation is ensured.

The application relates to the technical field of ring network boxes, and discloses a one-two fusion convenient maintenance ring network box, which comprises a box body and a plurality of electrical elements arranged in the box body, the box body comprises a top plate, side plates and a bottom plate, a plurality of heat dissipation holes for heat dissipation are formed in the side plates, a switching-on and switching-off knife is arranged on the electrical elements, a connecting groove is formed in the switching-on and switching-off knife, a magnetic block is arranged on the groove wall of the connecting groove, a driving rod is further connected to the switching-on and switching-off knife, a plurality of trigger rods are arranged on the driving rod, an adsorption block which is magnetically opposite to the magnetic block is arranged at the end of the trigger rod away from the driving rod, and the adsorption block extends into the connecting groove. The one-two fusion convenient maintenance ring network box realizes the synchronous switching-on and switching-off of a plurality of switching-on and switching-off knives through single operation of the driving rod and the trigger rod, and the condensate water on the inner walls of the side plates is scraped off through the dehumidification mechanism, so that the maintenance efficiency of the ring network box is improved, and the safe work of the electrical elements in the ring network box is ensured.

This invention relates to the field of chemical production technology and discloses a cyclohexanone oxime rearrangement mixer structure, a numerical simulation model, and an analysis method. The cyclohexanone oxime rearrangement mixer structure includes a main structure, a circular ring, a cyclohexanone oxime inlet, and cyclohexanone oxime orifices. The main structure is vertical, with a circulating liquid inlet, a throat, and a mixture outlet arranged sequentially from top to bottom. A circulating liquid containing caprolactam, sulfuric acid, and SO3 flows into the main structure from the circulating liquid inlet. The circular ring is fitted onto the main structure and located between the circulating liquid inlet and the throat. To achieve thorough mixing of cyclohexanone oxime and the circulating liquid, the numerical simulation model is constructed using the Eulerian multiphase flow model and the Realizable k-ε turbulence model. The momentum ratio (MR) is used as an evaluation index for mixing effect, ensuring the momentum ratio is within a suitable range of 1-4, thereby achieving efficient mixing.

This utility model discloses an anti-sticking device for a Jinfeng pill conveyor belt, comprising core components such as a frame, scraper, rotating frame, and fan frame. The frame has a sloping design at both ends, with a scraper at the front feed inlet to effectively scrape up Jinfeng pills adhering to the conveyor belt. Multiple circular grooves are distributed at the top of the frame, working in conjunction with baffles with sliding grooves at both ends to provide guidance and protection for material transport. The rotating frame is slidably connected to the frame via a bottom slider, while the fan frame slides along the top groove of the rotating frame. This combination allows for flexible multi-angle adjustment, ensuring that the airflow generated by the fan precisely targets the material, effectively removing powder from the pill surface and preventing adhesion. The device adopts a modular design, with all components connected by bolts and nuts. This device can be widely applied in Jinfeng pill production and conveying scenarios, ensuring pill integrity and conveying cleanliness through the synergistic effect of mechanical and wind power, significantly improving the operational efficiency and reliability of pharmaceutical production and conveying systems.

The invention relates to the technical field of bus ducts, and particularly provides a sealing plate assembly of a heat dissipation type bus duct connection area, which comprises a top plate, a bottom plate and two side plates arranged oppositely, the two side plates are arranged between the top plate and the bottom plate, and the two side plates, the top plate and the bottom plate enclose to form a connection area outer cover space. The top plate comprises lap joint sections located at the two ends of the top plate and a middle section located between the two lap joint sections, and the two lap joint sections are in lap joint with the outer sides of the tops of the adjacent bus duct sections respectively. A heat transfer path is formed between the closing plate assembly on the outer side of the connection area and the adjacent bus duct sections, heat generated in the operation process of the connection area can be diffused to the adjacent bus duct sections, the heat diffusion range is enlarged, local gathering of heat near the connection area is reduced, and the service life of the bus duct is prolonged. And the heat dissipation capability of the connection area is improved, and meanwhile, the sealing protection requirement of the connection area is considered.

The invention provides a terminal block capable of suppressing reduction of holding force of a nut and improving manufacturability. A terminal block (10) is provided with: a nut (20); a main body section (30) having a nut holding section (32) for holding a nut; and a bus bar (40) covering the nut from an upper side along a penetration axis (Z) of the nut. The nut holding portion has an opening portion (33) into which the nut can be inserted in an insertion direction (Y1) along an insertion axis (Y) orthogonal to a penetration axis (Z), at least one side surface (34a) of a pair of side surfaces (34) constituting the opening portion is a part of an inner surface of a plate-shaped side wall (34b), and the bus bar has an engagement protrusion (42) which engages with the side wall and is configured to engage with the side wall. The side wall is prevented from deforming in a manner that the opening part is opened.

This application discloses a functional segment, an aerosol generating article, and an aerosol generating system. The functional segment is at least capable of adsorbing or filtering aerosols. The functional segment has multiple suction resistance regions, each with a different suction resistance, and each suction resistance region extends from one end of the functional segment's axial direction to the other end. When applied to the aerosol generating article, the functional segment of this application can guide the flow of aerosols, thereby facilitating the adjustment of the suction resistance of the aerosol generating article, which helps improve the delivery efficiency of the aerosols and consequently enhances the user's suction experience.

The utility model discloses a kind of arm rotating device for spraying and pressure spray bottle, arm rotating device for spraying includes pressing part, arm rotating part, pressing part is provided with spray channel I, arm rotating part is provided with spray channel II, pressing part is used to connect pumping part and bottle body, characterized in that, spray channel I and the series connection channel of spray channel II are provided with a negative pressure cavity;When compression stroke, negative pressure cavity is pressed and extruded by liquid pumped by pumping part, when reset stroke, form negative pressure, and negative pressure cavity is communicated with the liquid outlet end of arm rotating part;Pressure spray bottle includes arm rotating device for spraying, pumping part and bottle body, the pressing part of arm rotating device for spraying is connected with bottle body, and pumping part is arranged between pressing part and bottle body.

The utility model discloses a screening device for crayfish feed production, and relates to the technical field of feed production devices. The crayfish feed screening device comprises a screening box and further comprises a main body part which is installed on the screening box and used for screening crayfish feed. The collecting part is arranged in the screening box and used for collecting the large feed in a centralized mode; the screening part is arranged on the screening box and is matched with the main body part, so that the feed is uniformly distributed on the main body part; wherein after the crayfish feed is poured into the main body part, the screening part is started, so that the crayfish feed is uniformly distributed on the main body part. According to the screening device for crayfish feed production, the collecting part is arranged, so that the problems that in the using process of an existing screening device for crayfish feed production, large feed is inconvenient to collect in a centralized mode and scattered in different areas of the screening device, repeated manual cleaning and transferring are needed, the operation process is increased, and the overall production efficiency is affected are solved.

The invention relates to a food processing technology, and discloses a stress relaxation microchannel guided low-fat high-oxidation-stability nut preparation method. The method comprises the following steps: adjusting the content of nut meat in an aqueous solution containing an antioxidant to 8-12% (dry basis), and then carrying out phase change induced stress treatment to form a micro-fracture network communicated with the outer surface in the interior; then increasing the pressure to 3 to 10 MPa at the speed of 1.0 to 2.5 MPa / min, and maintaining the pressure, wherein the hot / trap is 1.5 to 1.8; and rapidly relieving pressure and discharging residual oil at (2.5-3.5) v1, and rapidly shaping by adopting high-energy drying for 2-10 minutes by adopting radio frequency / infrared / microwave vacuum and the like. According to the method, the degreasing efficiency and the size stabilization rate are improved under the low pressure intensity, surface residual oil is reduced, flavoring is promoted, and the storage oxidation stability is improved.

The invention relates to the technical field of ceramic part cleaning, in particular to a cleaning device and method for high-cleanliness ceramic parts, the cleaning device comprises a cleaning box and a sealing cover hinged to the cleaning box, and a semi-enclosed electric heating wire is arranged on the side, away from a control panel, in the cleaning box; the cleaning assembly is arranged on the rotating frame, and the cleaning assembly comprises a first cleaning cavity and a second cleaning cavity which are located on the rotating frame; and the switching assembly is arranged below the rotating frame, and the switching assembly comprises a driving module and a placing module. Compared with the prior art, the placement module is forced to form a stable inclination angle when moving to the warping plate, and in cooperation with inclined jet flow of the second water outlet nozzle, cleaning liquid sweeps the arc-shaped outer surface and the side wall / transition fillet area at a more appropriate incidence angle; meanwhile, the inclined posture is beneficial to rapid discharge of a liquid film, and the common accumulated liquid, water pocket and water mark residual risks caused by horizontal placement are reduced.

The utility model provides a kind of farmland type ecological buffer zone structure, it is related to agricultural ecological environment management technical field, including land buffer area one, ecological regulation pond, land buffer area two and concave green land, land buffer area one, ecological regulation pond, land buffer area two and concave green land are sequentially distributed from farmland side to river embankment side, land buffer area one and land buffer area two are planted with arbor shrub and grass flower mat, the ecological regulation pond is sequentially provided with impermeable layer, adsorption layer and plant layer from bottom to top, the concave green land is laid with buffer base, the concave green land is planted with herbaceous plant and shrub. This structure effectively intercepts farmland non-point source pollution, reduces river pollutant, helps to strengthen river self-purification capacity, promotes aquatic animal and plant diversity development, and guarantees ecological benefit to play well.

The utility model discloses a masonry mortar spreading device for autoclaved aerated concrete porous building blocks, and belongs to the field of masonry mortar spreading. An autoclaved aerated concrete porous building block masonry mortar laying device comprises a shell, the shell is integrally formed by a bottom plate and at least two side plates, an opening is formed in the top of the shell, a transversely-extending discharging opening is formed in the bottom area of at least one side plate in the side plates, and a splitter plate is arranged on the outer wall of the shell in a sliding mode along the vertical edges of the side plates; a plurality of teeth arranged at equal intervals are arranged at the bottom edge of the splitter plate, and the distribution length of the teeth is smaller than the transverse length of the discharge port; the position height of the splitter plate can be adjusted, the mortar laying thickness of mortar can be more effectively controlled, a worker can flexibly adjust the thickness of the mortar according to actual construction requirements, the adaptability of construction is improved through the flexibility, mortar waste caused by uneven coating can be reduced, and the construction efficiency is improved. Therefore, the economic benefit of construction is improved.

The utility model provides a biomass incinerator feed inlet accumulated material recovery device which comprises a conveying belt, a funnel and a material collecting cavity, the front side and the rear side of the conveying belt are each provided with a set of outer supporting frames used for supporting the outer side of the conveying belt, and the outer side of the left end of each outer supporting frame is provided with a set of front cover plates used for shielding biomass incineration disintegrating slag smoke dust. Compared with the prior art, the biomass incineration disintegrating slag recycling device has the advantages that when biomass incineration disintegrating slag is guided, conveyed and recycled through the conveying belt, the motor drives the conveying belt to move, the biomass incineration disintegrating slag is moved from left to right through the conveying belt, and in the moving process, the biomass incineration disintegrating slag can be recycled. The supporting frame of the M-shaped structure and the guide rollers support the lower end of the conveying belt, the vibration degree of the conveying belt can be reduced so that the dust raising situation generated in the biomass incineration disintegrating slag conveying process can be reduced, and meanwhile the dust raising situation can be reduced in the biomass incineration disintegrating slag feeding and discharging process through the front cover plate and the rear cover plate.

This invention discloses a welding method for connecting a copper tube and a steel rod via an electromagnetic pulse waveform interface. The method includes: first, machining an annular groove on the surface of the steel rod to be welded; along the axial direction of the steel rod, the depth of the annular groove gradually increases from the center to both sides, with the center of the groove flush with the axial surface of the steel rod, thus forming an annular tapered groove; then, fitting the copper tube onto the steel rod, aligning it with the surface to be welded; and finally, welding the copper tube and steel rod using electromagnetic pulse welding. This welding method effectively promotes the ejection of metal debris from the copper tube and steel rod at the material interface during the welding process, reducing the retention of high-speed moving metal debris at the interface, thereby avoiding cracks caused by metal debris accumulation and energy concentration at the interface, and thus effectively achieving electromagnetic pulse welding for copper-steel waveform interface connections.

The utility model relates to the technical field of pest control box, disclose a corn is with field pest control box, including main box, the bottom fixedly connected with the chassis of main box, the top of chassis is provided with automatic mechanism, the top fixedly connected with the funnel frame of main box, the inner wall of main box is provided with the falling mechanism, automatic mechanism includes the feed tank, the bottom fixedly connected in the top of chassis of feed tank, the inner wall fixedly connected with the timing telescopic link of feed tank, the top fixedly connected with the bottom plate of timing telescopic link, the top fixedly connected with polyethylene pad of bottom plate, the inner wall of feed tank is set up with the storage groove. In the utility model, through material flow transfer timing telescopic link setting time telescopic, drive bottom plate to lift, polyethylene pad reduces bottom plate corrosion, through the conveying pipe with the storage tank in material outward transfer, support plate and sliding page cooperation simultaneously, guide material flow direction, reduced artificial cost.

The utility model discloses an easy-to-wear anti-skid pressure sock which comprises a foot sock leg and a leg sock leg, and an anti-skid layer is arranged on the surface, located at the sole position, of the foot sock leg. The leg sock leg is fixedly connected to an opening of the foot sock leg, an opening and closing assembly is arranged on the surface of the leg sock leg along the leg sock leg, and the anti-skid layer is a flexible silica gel layer and is in a W shape. The anti-slip layer and the opening and closing assembly are arranged, the anti-slip layer is used for improving the anti-slip performance of the foot sole position of the foot sock leg, the opening and closing assembly is used for opening the leg sock leg, and therefore a foot can be directly worn in the foot sock leg, and then the leg sock leg is closed through the opening and closing assembly after the leg sock leg wraps the shank position. The purpose of quickly wearing the pressure socks is achieved, and the problems that in the prior art, the pressure socks are inconvenient to wear due to the fact that the legs of the pressure socks are long, and daily wearing is affected due to insufficient skid resistance when the socks are located at the long positions are solved.

This invention discloses a method for forming hollow tubes based on low-shrinkage PEKK to achieve high-fidelity replication of the inner wall, belonging to the field of precision molding technology for high-performance thermoplastic polymers. The method includes the following steps: material selection, melt contact molding, inner wall morphology replication, shrinkage attachment control, rapid cooling and freezing, and demolding to obtain the finished product. This invention, through a series of structures and precise control of material shrinkage behavior, allows the inner wall morphology of the tube to directly replicate the surface of the mandrel. The roughness difference ΔRa between the inner wall of the tube and the surface of the mandrel is ≤0.3μm, truly achieving high-fidelity replication of the inner wall morphology and fundamentally solving the problem of large replication deviations in traditional molding processes.

This invention provides a nanofiber fluoropolymer composite fabric and its preparation process, belonging to the field of composite fabric technology. The process includes the following steps: S1, electrospinning a one-way moisture-wicking layer onto the outer layer of cotton fabric; S2, preparing a hollow fiber / nanofiber fluoropolymer composite layer; S3, laying a PA hot-melt web film layer on the one-way moisture-wicking layer, then laying the hollow fiber / nanofiber fluoropolymer composite layer on the PA hot-melt web film layer, heating, laminating, and cooling to obtain the nanofiber fluoropolymer composite fabric. This invention achieves both waterproof performance and one-way moisture-wicking permeability.

This utility model belongs to the field of valve technology, specifically disclosing a conical flow-guiding anti-clogging electric regulating valve for thermal pipeline networks. The utility model includes a valve body with a connecting seat on one side. Filter components are located on both sides of the valve body, and a flow regulating component is located on one side of the connecting seat. The filter components achieve staged filtration through two filter screens with different mesh sizes. The larger mesh screen first intercepts large impurities, preventing them from impacting and scratching subsequent components, while the smaller mesh screen filters out finer impurities, achieving comprehensive removal of impurities from the medium. Combined with the conical flow channel's characteristic of reducing impurity retention, this significantly reduces the risk of valve clogging. Furthermore, the filter screens can be installed and removed without tools, ensuring stable operation under medium impact, continuously guaranteeing the efficient and safe operation of the valve and thermal pipeline network, and extending equipment lifespan.

A die head melt flow guiding device of a hollow plastic container blowing forming machine comprises a flow dividing plate melt outflow adjusting control mechanism and a melt flow dividing mechanism, and the melt flow dividing mechanism comprises a melt flow dividing device fixing plate, a melt flow dividing device and a melt leading-in connector; the splitter plate melt outflow adjusting control mechanism is arranged on the lower portion of the side, back to the front melt splitter plate, of the rear melt splitter plate, and is characterized in that the structure of the rear melt splitter plate sub-runner is the same as that of the front melt splitter plate sub-runner, and the front melt splitter plate sub-runner comprises a first material receiving runner and a second material receiving runner; when the melt leading-in connector is fixed to one side of the melt front splitter plate, one end of the first material receiving runner and one end of the second material receiving runner are jointly communicated with the melt leading-in connector, and the other end of the first material receiving runner and the other end of the second material receiving runner incline downwards, form an inverted first Y-shaped runner and an inverted second Y-shaped runner and are communicated with the die head body. The melt flow path is shortened, the die head color changing time is shortened, friction between the melt and the runner wall is relieved, shearing heat is reduced, and it is guaranteed that the melt flows evenly and smoothly.

This utility model discloses a modular flowerpot tray device, relating to the field of flowerpot trays, comprising a water collection box, a support frame, a protrusion, a water guide groove, a drain pipe, and a pipe groove; one or more support frames are provided at the upper opening of the water collection box; the support frame consists of a support plate, legs, and permeable holes; multiple legs are connected to the bottom edge of the support plate, and permeable holes are provided on the surface of the support plate; the support frame is placed directly inside the water collection box; a water guide groove is provided on the bottom inner wall of the water collection box, and two drain holes communicating with the water guide groove are provided on the side wall of the water collection box, one drain hole being connected to the drain pipe, and the other drain hole being connected to the pipe groove, the diameter of the drain pipe being adapted to the pipe groove; this modular flowerpot tray device integrates support, drainage, water collection, and flow guidance functions, with a reasonable structural design and strong practicality.

This utility model discloses an interlocking block slope protection for a plain reservoir dam, comprising several evenly arranged slope protection blocks. Each slope protection block has multiple elongated openings along its transverse direction on its front side, extending longitudinally through the block. Multiple longitudinal drainage pipes are installed within each slope protection block, with both ends of each pipe connected to the outside. Furthermore, the drainage pipes are arranged in a matrix along the longitudinal direction. Even further, a connecting pipe is provided between two adjacent drainage pipes in the transverse direction. Furthermore, a rubber pad layer is provided on the outer surface of each slope protection block. Even further, the surface of the rubber pad layer has several raised points. This utility model, by installing multiple drainage pipes inside the slope protection block and providing a rubber anti-slip layer on the outer side, enables the slope protection block to drain rainwater quickly and efficiently without losing stability under temperature changes.

The utility model belongs to blast furnace coal injection control valve field discloses a control integration wear -resisting corrosion -resisting valve for blast furnace coal injection uniform regulation and control. The utility model's ball surface is polished by mirror surface, so the surface is extremely smooth and erosion -resistant. When the valve is opened and closed, the ball will rotate 90 DEG, and this rotation changes the flow direction and produces scraping effect, and small coal powder adhered to the surface is entrained into the main stream. At the same time, the hard coating avoids burr or step due to abrasion, and keeps low roughness for a long time, so as to reduce the opportunity of powder retention from the source. The flow channel of the utility model through the ball adopts full diameter, equal diameter structure, and the inlet and outlet use round chamfer, and the turning radius is not less than three times of the pipe diameter. This smooth transition can eliminate the pressure drop and dead angle caused by sharp expansion and contraction, ensure that the high-speed gas-solid two-phase flow always flows along the wall without vortex deposition, thereby reducing the probability of particle residence in local.

This utility model relates to the field of paving brick technology and discloses a high-quality permeable paving brick made of natural sand, including a permeable skeleton layer, a bottom layer of high-quality natural sand permeable paving bricks at the bottom of the permeable skeleton layer, and a top layer of high-quality natural sand permeable paving bricks at the top of the permeable skeleton layer. In use, the corresponding conical drainage channels and through holes are coaxial and connected, achieving dual-effect permeability through siphoning and flushing. When water flows through the surface layer of the high-quality natural sand permeable paving bricks, the conical drainage channels increase the flow velocity and generate negative pressure suction. When the water flow is large, a high-speed jet forms in the channels to flush away sediment. The bricks are arranged in a honeycomb pattern during laying, and the corresponding arc-shaped male tenons and arc-shaped female tenons form an interlocking structure. The curved joints can automatically level the angle, and the interlocking structure increases the effective permeable joint width, thus improving permeability. The drainage channels in the interlocking area can form a dual drainage channel with the vertical infiltration holes.

The utility model generally relates to the technical field of medical supplies, in particular to a medical isolation sheet for magnetic resonance mammary gland examination, a head examination hole is formed in the position, corresponding to the head, of the isolation sheet, a chest examination hole is formed in the position, corresponding to the chest, of the isolation sheet, and an isolation cover is downwards arranged at the chest examination hole. The isolation cover is arranged in a downward protruding mode. The disposable isolation sheet is adopted, one person can be replaced when the disposable isolation sheet is used, the isolation sheet can effectively prevent a patient from making large-area direct contact with equipment, the head and face of the patient are prone to be attached to the interior of a head groove of the equipment through the head examination hole, and the two breasts of the patient are exposed and perpendicularly arranged in two chest grooves of the equipment through the chest examination holes; wherein the isolation hood can support the bottom of the chest, retention of body fluid of a patient on equipment is reduced, the risk of cross infection is reduced, medical staff only need to simply clean and maintain the equipment after examination, and the labor intensity of the medical staff is reduced.

The utility model relates to the technical field of precise screw production, in particular to an automatic feeding device for precise screw production, which comprises a base, a supporting seat arranged at the top of the base, a feeding component arranged at the top of the supporting seat and a conveyor arranged at the top of the base. The cleaning assembly comprises a rotary drum, a plurality of scrubbing brushes, a wiping body and a wiping strip which are arranged in the rotary drum in an annular mode, a supporting plate arranged at the top of the base, a support arranged at the top of the supporting plate and a dust collection component arranged at the top of the support, a guiding body is arranged at the top of the conveyor, and the anti-blocking assemblies are arranged on the two sides of the guiding body. When screws are fed and conveyed, scrap iron attached to the outsides of the screws can be cleaned, and the problem of blockage caused by retention of the screws in the conveying process can be solved.