3626 results about "Small particles" patented technology

The invention discloses an optimized preparation method of a high-strength flame-retardant polyamide-based composite material in the technical field of information, which comprises the following steps: in the preparation process of the composite material, acquiring online dispersed state monitoring data of a modified filler by using a laser particle size analyzer and an optical microscope, including particle size distribution, agglomeration degree and dispersion uniformity of the filler; according to online dispersion state monitoring data, parameter ranges of melt flow property characterization are determined, the parameter ranges comprise the shearing rate and the temperature, particle size distribution data are used for determining the shearing rate range, small particle size distribution corresponds to the high shearing rate range, and agglomeration degree data are used for determining the temperature range; the higher degree of agglomeration corresponds to a higher temperature range to promote the dispersion of the filler, and these parameters are directly used to guide the setting of the subsequent rheological test.

The invention discloses a variable-frequency ash removal device for improving photovoltaic power generation efficiency, and a control system of the variable-frequency ash removal device can dynamically adjust the output frequency and amplitude of a signal generator according to cleaning requirements. Particularly, when different types of dust are cleaned, the system can automatically adjust the vibration frequency, so that the cleaning process is more accurate. Large-particle dust is effectively removed through low-frequency and large-amplitude vibration, and small-particle dust is finely cleaned through high-frequency micro-vibration. The dynamic adjustment of the frequency and the amplitude ensures that each dust type can be thoroughly removed, and the problem of poor effect caused by fixed frequency in a traditional cleaning method is avoided.

The invention relates to the technical field of gangue filling, in particular to a coal mine gangue roadway type filling method which comprises the following steps: (1) screening gangue, and classifying the gangue into corresponding particle size groups according to particle sizes; (2) designing grading schemes according to the particle size groups divided in the step (1), performing simulation by using PFC2D numerical simulation software to obtain stress-strain curves of the grading schemes, and selecting the grading scheme with the maximum peak stress as the optimal grading scheme; and (3) filling the roadway type filling area according to the optimal grading scheme determined in the step (2). According to the method, the optimal grading scheme is determined by simulating the stress damage process of the internal structure of the original waste rock filling body under different particle size grading schemes through PFC2D, simulation verification shows that the stress concentration condition of the left side and the right side of the filled roadway is improved, the filling body filled in the roadway can replace roadway surrounding rock to bear part of pressure, and the working efficiency is improved. The problem that the crushing pressure is large when small-particle gangue is used in the prior art is solved.

The invention discloses a wafer detection model training method, a wafer detection method, a wafer detection system, wafer detection equipment and a medium, and the method comprises the steps: obtaining a wafer surface defect image set, carrying out the category marking of the wafer surface defect image set, constructing a wafer defect detection data set, constructing an improved RT-DETR model, and carrying out the training of the improved RT-DETR model according to the wafer defect detection data set. Training the to-be-detected image of the wafer until the training is finished to obtain a wafer detection model, inputting the to-be-detected image of the wafer into a pre-trained wafer detection model, outputting a detection result of the to-be-detected image of the wafer, outputting a defect probability and a mark of the to-be-detected image of the wafer, and obtaining the defect probability of the to-be-detected image of the wafer through an improved RT-DERT model. The detection performance on small particles, slender scratches and the like is effectively improved.

The present invention discloses a PHA / PVA nanoscale paper-based barrier emulsion, and its preparation method and application. The aqueous emulsion comprises PHA particles with an average particle size of 100 nanometers to 300 nanometers and PVA, wherein PHA and PVA are blended in a specific ratio, and PVA is blended with PHA as the main film-forming component and barrier performance contributing component to form the nanoemulsion. The preparation method comprises mixing PHA particles with an initial average particle size of 1 micron to 100 microns with a PVA aqueous solution, and processing the nanoemulsion by nano-processing means such as high-pressure homogenization. The emulsion can be applied to paper-based materials, such as paper and cardboard surfaces, and forms a barrier coating after drying. The emulsion obtained by the present invention has small particle size, good stability, good leveling properties, and is easy to form a uniform and dense barrier film on the paper base. The film has excellent water vapor, oxygen and grease barrier properties, and the material is bio-based, biodegradable, and environmentally friendly.

The invention provides a negative electrode material and a preparation method thereof. The negative electrode material comprises an inner core and a coating layer coating the surface of the inner core, the inner core comprises a porous carbon matrix and amorphous nano silicon particles dispersed in the porous carbon matrix; pores in the porous carbon matrix comprise micropores, the pore diameter of the micropores is less than 2nm, and the quantity of the micropores accounts for more than or equal to 80% of the total quantity of the pores. According to the negative electrode material, a silicon-carbon material core is coated with a coating layer, and the number of micropores in a porous carbon matrix is adjusted, so that on one hand, direct contact reaction between high-activity nano silicon and an electrolyte is effectively avoided; and on the other hand, the particle size of the amorphous nano silicon particles in the negative electrode material is relatively small, the dispersity in the porous carbon matrix is relatively good, and the negative electrode material has relatively low expansion rate and relatively high initial coulombic efficiency, rate capability and cycle performance.

A method for producing a memorial from remains of a pet includes steps of: providing a substrate; selecting a part of the remains of the pet, and processing the part into a plurality of small particles; selecting a coating material that can be applied and affixed onto the substrate, and well mixing the particles with the coating material; and applying the coating material onto a surface of the substrate. The memorial carrying a part of remains of a pet can act as an object for an owner of the deceased pet to repose his / her love to the pet and relieve the owner from grieving over the deceased pet. The memorial can be customized to the owner's preferences and accompany the owner as if the pet were still living.

Alloy elements are reasonably matched, N and nitrides are added to form elements such as tungsten W, vanadium V, niobium Nb, cobalt Co, rare earth RE and the like for microalloying smelting, a forged and rolled material finished product is subjected to proper heat treatment, and the stainless steel subjected to heat treatment has good heat treatment performance through metallographic observation. According to the stainless steel, nanoscale carbides are separated out in a solid solution state, and fine particles mainly containing nitrides are dispersed and separated out in crystals in a thermodynamic state, so that the material is strengthened and does not diffuse to a crystal boundary, and the room-temperature mechanical property and the high-temperature mechanical property of the material are greatly improved; and when the stainless steel material produced by the method is used for manufacturing related products, the thickness of the stainless steel material can be reduced, and the overall input of the stainless steel material is greatly reduced, so that the large-scale application of noble metal strategic resource nickel is saved, and the aims of saving resources, energy and investment are fulfilled.

The invention discloses a method for preparing nano barium titanate based on sol-gel synergistic hydrothermal reaction, which comprises the following steps: (1) dissolving barium acetate in an acetic acid aqueous solution to obtain a barium source solution; weighing tetrabutyl titanate according to the molar ratio of barium to titanium being greater than 1.25, and dissolving the tetrabutyl titanate in alcohol to obtain a titanium source solution; (2) uniformly mixing the barium source solution and the titanium source solution, preserving heat at 20-80 DEG C to obtain gel, drying and grinding to obtain white powder of the barium titanate precursor: (3) preparing a 2-4mol / L inorganic strong alkali aqueous solution, adding the white powder and a dispersing agent into the inorganic strong alkali aqueous solution, and fully stirring to obtain a barium titanate precursor suspension; and (4) transferring the barium titanate precursor suspension into a reaction kettle for hydrothermal reaction, and after the reaction is completed, washing, drying and grinding to obtain the nano barium titanate powder. The preparation method is low in cost, and the prepared nano barium titanate powder is uniform in distribution, spherical or sphere-like in morphology, small in particle size, 80-150nm in average particle size and good in particle crystallinity.

The invention provides a special double-cavity row type airflow crushing system for producing diamond micro-powder, and effectively solves the problems that when an existing airflow crushing machine crushes diamond, the impact frequency of large particles is insufficient, small particles are excessively crushed, the particle size distribution range of the crushed micro-powder is wide, and the particle size of the produced diamond micro-powder is not uniform. According to the technical scheme, the device comprises two jet mills and a connecting structure, the jet mill comprises a crushing cavity, a feeding hole, a crushing nozzle, a pressure equalizing chamber and an air outlet; the crushing cavity is of a disc cavity structure consisting of a circular-ring-shaped side lining plate, an upper-end lining plate and a lower-end lining plate; spiral strips are arranged on the inner side walls of the side lining plates; the connecting structure comprises a cylindrical shell and a hollow pipe at the lower end of the cylindrical shell, and one end of the hollow pipe gradually faces downwards and communicates with the crushing cavity; a material guide plate is arranged on the lower end surface of the upper end lining plate; blanking pipes are arranged on the left and right sides of the lower end of the cylindrical shell; the lower ends of the blanking pipes are communicated with the crushing cavity; a filter screen is arranged at the upper end of the cylindrical shell.

The invention belongs to the technical field of powder metallurgy, and discloses a novel double-circular-seam atomizer and an atomizing device.The novel double-circular-seam atomizer comprises an atomizer base body, a vertically-through melt channel is formed in the middle of the atomizer base body and used for allowing a flow guide nozzle to penetrate through, and the atomizer base body is provided with a cavity coaxial with the melt channel and a circular-seam spraying hole; the cavity is used for inputting high-pressure gas, and the circular seam spraying hole communicates with the cavity and is used for spraying out the high-pressure gas to form high-speed gas flow so as to break metal melt liquid flow flowing out of the flow guide nozzle. The number of the circular seam spraying holes is two, the two circular seam spraying holes are the first circular seam spraying hole and the second circular seam spraying hole, the second circular seam spraying hole surrounds the first circular seam spraying hole from the outer side of the first circular seam spraying hole, and on any longitudinal section plane of the atomizer base body, the jet flow center lines of the second circular seam spraying hole and the first circular seam spraying hole intersect at one point; the melt liquid flow crushing effect can be improved, the diffusion angle of metal liquid drops is increased, formation of large particles is reduced, and metal powder with smaller particle size and better sphericity degree is obtained.

The present invention relates to the technical field of pulverizing devices, and discloses a feed efficient pulverizing device for feed processing and a processing method. The feed efficient pulverizing device for feed processing comprises: a pulverizing outer cylinder, a feed hopper is installed on the top of the pulverizing outer cylinder, a pulverizing mechanism is arranged in the pulverizing outer cylinder, and the pulverizing mechanism comprises a rotary drive component, a shaking component and a plurality of pulverizing components. The present invention provides a plurality of pulverizing components, and pulverizes the feed raw materials in small batches. The pulverizing components are used to circulate circular motion in the pulverizing outer cylinder to maintain the continuous introduction of the feed raw materials. During the pulverizing component's circular motion, the pulverizing components are further driven to reciprocate up and down, so as to increase the contact opportunity between the feed raw materials and the pulverizing end of the pulverizing component, so that the feed raw materials can fully contact the pulverizing end of the pulverizing component, and the feed raw materials can be pulverized to the desired small particle size in a short time.

The invention discloses injectable cross-linked hyaluronic acid gel containing hydroxyapatite microspheres as well as a preparation method and application of the injectable cross-linked hyaluronic acid gel containing the hydroxyapatite microspheres, and the preparation method comprises the following steps: step 1, adding a cross-linking agent and the hydroxyapatite microspheres with the crystallinity of 60-90% into a hyaluronic acid HA solution, cross-linking to obtain composite gel, and cutting the composite gel through a 60-100-mesh screen to obtain large gel particles; 2, a cross-linking agent and hydroxyapatite microspheres with the crystallinity being 30%-60% are added into the HA solution, composite gel is obtained after cross-linking, and the composite gel is cut through a 140-200-mesh screen to obtain small gel particles; and step 3, adding the large gel particles and the small gel particles into the non-crosslinked HA solution, and uniformly mixing to obtain the injectable crosslinked hyaluronic acid gel containing the hydroxyapatite microspheres. The composite gel obtained by the invention has a continuous collagen regeneration promoting effect, the in-vivo effect maintenance time is prolonged, and the composite gel has an excellent soft tissue filling and repairing effect.

The invention relates to the technical field of concrete, in particular to luminous pervious concrete and a preparation method thereof. The luminous permeable concrete is prepared from the following raw materials in parts by mass: 280-300 parts of cement, 870-900 parts of interval grading coarse aggregate, 70-80 parts of modified luminous powder, 30-40 parts of fly ash, 4-6 parts of a water reducing agent, 20-30 parts of a water repellent agent, 30-40 parts of epoxy resin, 3-5 parts of a silane coupling agent and 90-100 parts of water, and the interval grading coarse aggregate is prepared by mixing coarse aggregate with a small particle size of 4.95-9mm and coarse aggregate with a large particle size of 12.5-10mm according to a mass ratio of 1: 2; the surface of the modified luminescent powder is coated with silicon dioxide sol, and sodium borate is added for heat-resistant treatment. The light-emitting water-permeable concrete has compressive strength and water permeability, the light-emitting property is stable, and the hydrophobic and oleophobic corrosion resistance in the concrete is good.

The invention discloses a preparation process of acellular matrix particles, and relates to the technical field of biomedical material processing. The invention provides an acellular matrix particle preparation process based on a biological enzyme method and a fluidized bed principle. The acellular matrix particle preparation process comprises the following steps: alkali treatment, acellular dehydration, grinding and screening. The step of screening is based on the fluidized bed screening principle, the acellular matrix particles are input into a fluidized bed layer, the particles suspended on the fluidized bed layer can settle rapidly under the action of fluid, and the particles with small particle sizes can rise along with the fluid and enter a discharging system. The preparation process can realize accurate screening of acellular matrix particles, significantly reduce the particle size fluctuation range, can directionally prepare particles in a specific particle size interval, and has the characteristics of high efficiency, continuous production, simple operation and strong applicability.

The invention provides a mixing device and a mixing method for neodymium-iron-boron magnet production, and belongs to the technical field of mixing devices.The mixing device comprises a mixing tank body, a detachable top cover is arranged at the top of the mixing tank body, a screening assembly and an airflow crushing assembly are arranged at the top of the top cover, the screening assembly comprises a screening box, and the screening box is arranged at the top of the top cover; the airflow crushing assembly comprises an airflow crushing bin, one side of the screening box is connected with the airflow crushing bin, a stirring cavity is formed in the mixing tank body, a stirring assembly is arranged in the stirring cavity, the stirring assembly comprises a separation cover and two sets of spiral material turning blades, and the separation cover divides the stirring cavity into an inner mixing cavity, a material turning cavity and a top mixing cavity. A plurality of groups of communicating grooves for communicating the inner mixing cavity with the material turning cavity are formed in the bottom end of the separation cover; the two groups of spiral material turning blades are positioned in the material turning cavity; through the arrangement of the airflow crushing assembly, large-particle materials can be crushed into fine particles; and through the arrangement of the stirring assembly, the materials can circulate in different chambers, and uniform mixing of the materials is ensured.

The invention discloses a wellhead valve capable of taking out impurities in a pipeline for oil exploitation, relates to the field of oil exploitation, and solves the problems that when an existing wellhead valve for oil exploitation is used, the impurities in a filter screen are difficult to be self-cleaned in the process of screening and filtering the impurities in the pipeline, and the service life of equipment is short. Comprising a shell, a filtering mechanism, a cleaning mechanism and a switching mechanism, the side face of the shell communicates with an input pipe and an output pipe, the filtering mechanism comprises a rotating shaft and a filtering plate, multiple sets of screen holes are evenly formed in the filtering plate, and the cleaning mechanism comprises a cleaning rod. Impurities on the two sets of filter plates are synchronously removed through the cleaning rod, when one sides of the filter plates are cleaned through the cleaning rod, the directions of the filter plates are switched through linkage of the switching mechanism, small-particle impurities which are not cleaned in sieve holes are pushed to one side of the output pipe through flowing of petroleum to be discharged, and the self-cleaning function of the filter plates is achieved.

The invention relates to a cassette cleaning process and a cleaning device thereof. The invention discloses a cassette cleaning process which is used for sequentially performing spraying, ultrasonic cleaning and bubbling rinsing procedures on a cassette. Wherein in the bubbling rinsing step, gas with a certain flow rate is filled into liquid to form tiny bubbles, so that tiny particles falling off in the ultrasonic cleaning step are taken away. The cassette cleaning process has the advantages that tiny particles which fall off during ultrasonic cleaning and then are attached to the surface layer are timely and effectively peeled off again and discharged, secondary attachment is avoided, and the cleaning efficiency and effect are improved; and large-size particles and residual chemical substances in the cassette are cleaned through spraying, so that various types of pollutants are cleaned.

The invention relates to the technical field of pulverized coal separation, in particular to a cyclone separator, a pulverized coal separation system and a cyclone separator structure optimization method.The cyclone separator comprises an air inlet unit which comprises an air inlet assembly and a separation assembly connected with the air inlet assembly; and the discharge unit comprises an exhaust assembly arranged on the inner side of the separation assembly and a dust discharge assembly arranged at the bottom of the separation assembly. The cyclone separator has the beneficial effects that by arranging the spiral channel, the centrifugal force after dust-containing gas enters can be increased, the dust particle separation efficiency is improved, the longitudinal circulation phenomenon at the top of the separator can be effectively avoided, the influence of a top ash ring is relieved, and mutual interference of airflow in adjacent inner and outer rotational flows is avoided; and the number of particles of large-particle-size dust entering the exhaust pipe through longitudinal circulation is reduced, the flow field can be stabilized, the separation performance is improved, and the separation efficiency of small-particle-size dust is improved.

The invention belongs to the technical field of hydraulic engineering, and provides a sediment particle size distribution measuring system and method.The method comprises the steps that images of sediment particles in a water body are collected, and a first sediment particle image is obtained; processing the first sediment particle image to obtain a sediment grayscale image; a K-means clustering algorithm is adopted to carry out clustering analysis on the sediment gray level image, and an image with a first-level clustering result is obtained; carrying out clustering analysis on sediment particles with particle sizes smaller than a preset threshold value in the image with the first-level clustering result by adopting a DBSCN clustering algorithm to obtain an image with a second-level clustering result; and carrying out edge detection on the sediment particles in the image with the secondary clustering result, and then sequentially carrying out binarization processing, equivalent circle diameter transformation and statistics on the particle size distribution of the sediment particles to obtain a particle size distribution result. The problem that an existing sediment particle size measurement system is low in measurement precision in a complex underwater environment with dense sediment and more fine particles is solved.

The invention discloses a machine-made sand grading calculation method based on a double-vision compensation algorithm, and relates to the technical field of computer vision. According to the invention, through a compensation algorithm combining global and local images, the stability problem of small-particle-size particles is effectively solved. The global image provides distribution information of the whole sand grains, the local image can accurately capture details of the small grains, the instability of the small-grain-size grains is compensated through an algorithm, and the stability and the accuracy of a measurement result are ensured; according to the method, errors caused by particle shape irregularity are overcome, the mass of the particles is measured through experiments, the equivalent height is calculated by combining the projected area and density of the particles, and the method effectively avoids volume calculation deviation caused by the particle shape irregularity.

The utility model relates to the technical field of ore extraction, in particular to an ore extraction device which comprises a base of a whole device carrier, a crushing mechanism used for crushing ore is arranged on the base, a flotation tank used for separating metal substances is arranged on the base, and the base is further provided with a material distributing assembly used for expanding the discharging range. The crushing mechanism comprises a ring body rotationally installed on the base, a grinding roller rotating in the direction opposite to the ring body is further installed on the base, the diameter of the grinding roller is gradually increased from top to bottom, crushing teeth are fixedly connected to the inner ring of the ring body and the outer ring of the grinding roller, and the ring body is arranged outside the grinding roller in a sleeving mode. The crushing mechanism is arranged, the grinding roller and the ring body rotate in opposite directions, ore can be crushed through the crushing teeth, the grinding roller is in the shape of a circular truncated cone, the ore can be crushed step by step, raw materials can be decomposed into small particles, the mechanical stone crushing process can be conducted more easily and efficiently, and the crushing efficiency is improved. And the overall crushing efficiency is improved.

The utility model relates to a kitchen oil separation device capable of recycling waste oil, and belongs to the field of waste oil recovery. The device comprises a shell which comprises a centrifugal part and an oil receiving part, and the centrifugal part is provided with a smoke inlet; the oil receiving ring is fixed in the oil receiving part and is provided with an oil leakage hole; the liquid separation plate is arranged on the oil receiving ring; the smoke exhaust pipe is fixed in the centrifugal part and comprises a sealing part, a hollow part and a connecting part; wherein an impeller is installed in the hollow-out part, a first scraping plate is connected to the liquid separation plate in an abutting mode, and a connecting rod is fixed between the impeller and the first scraping plate. Oil smoke gas is sucked through the negative pressure effect to enter the centrifugal part through the smoke inlet to impact the liquid separation plate to intercept large-particle oil dirt and stay on the liquid separation plate, the oil dirt is finally collected into the groove in the oil receiving ring, small-particle oil dirt enters the hollow part along with airflow and forms vortex through the air holes formed in the inclined angle, the vortex enables oil-gas mixtures to be centrifugally separated, and oil-gas separation is achieved. And finally, the small-particle oil is adhered to the surface of the hollow part and falls onto the liquid separation plate again under the action of gravity, so that waste oil recovery is realized.

The invention relates to the technical field of sediment particle size detection, in particular to a river sediment particle size detection device which comprises a main body plate, a centrifugal partition mechanism enabling particles in a solution to be classified according to the size of the particle size is arranged in the main body plate, and the centrifugal partition mechanism comprises a first empty groove formed in the upper end of the main body plate; a supporting plate is rotationally matched in the first empty groove, a rotating body is arranged at the upper end of the supporting plate, the upper end of the rotating body is of an opening structure, a containing shell is arranged in the rotating body in a matched mode, the containing shell is of a transparent structure, and a bubble removing mechanism for removing bubbles through pressure reduction and ultrasonic waves is arranged at the lower end of the main body plate. A detection mechanism for detecting various particle sizes in a solution is arranged at the upper end of the main body plate; under the action of centrifugal force, particles with different particle sizes enter different adjacent baffle rings, meanwhile, under the shaking of the bubble removing mechanism, it can be guaranteed that particles with small particle size differences are evenly laid in the baffle rings, and the situation that small particles are blocked by large particles is prevented.

The invention belongs to the technical field of pipeline cleaning, and particularly relates to a dynamic wall pipeline with a cleaning structure, which comprises an arc-shaped shovel plate, a connecting spring is fixedly mounted on the back surface of the arc-shaped shovel plate, a bag body is fixedly mounted on one side, far away from the arc-shaped shovel plate, of the connecting spring, and a step end is arranged in the middle of the inner arc surface of the bag body. The ends, away from the arc-shaped shovel plates, of the connecting springs are fixedly installed on the surface of the step end. An arc-shaped groove is formed in the side, close to the step end, of the inner arc face of the bag. The arc-shaped shoveling plate usually has certain hardness and sharpness, stubborn dirt and sediments on the inner wall of a pipeline can be powerfully scraped off, hard-shell-shaped scaling, sticky oil dirt or solid particle accumulation can be effectively stripped off from the pipe wall through the scraping plate, the bag body has soft texture and good water absorption, and the bag body is not prone to falling off. The inner wall of the pipeline can be wiped carefully after the scraping plate scrapes most dirt, and residual sewage and small particles can be adsorbed, so that the inner wall of the pipeline is smoother and cleaner.

The invention discloses a Roots blower with a filtering structure, and particularly relates to the technical field of Roots blowers, the Roots blower comprises a base, a main motor is fixedly mounted at the upper end of the base, a Roots blower body is fixedly mounted at the upper end of the base, and vibration separation assemblies are jointly arranged at the front part and the lower end of the inner surface of a shell; and a wet-type filtering assembly is arranged at the rear part of the inner surface of the shell. According to the Roots blower with the filtering structure, by arranging the liquid film mechanism, the cloth bag device and the plugging mechanism, air can be filtered in a dry-wet combined mode, so that large-particle or small-particle dust and impurities in the air can be effectively removed, the filtering capacity and effect are improved, and the service life of the Roots blower is prolonged. The formed liquid film can efficiently capture dust in the air, the gas-liquid contact area is increased, so that dust particles are more easily in contact with the liquid film and are captured, and the capture efficiency of fine particulate matters including tiny dust particles can be remarkably improved.

The utility model provides an adsorption device for wafer processing, a wafer grinding device and wafer thinning equipment. The adsorption device comprises an adsorption plate, a suction cup, a through-flow shaft with an axial through hole and a mounting seat, and the adsorption plate is arranged in a containing cavity of the suction cup; the through-flow shaft passes through the binding surface between the mounting seat and the suction cup and extends into the suction cup, so as to avoid the binding surface between the suction cup and the mounting seat to suck fluid from the suction cup for wafer adsorption or input fluid into the suction cup for wafer release; the suction cup is provided with a fluid channel in fluid communication with the containing cavity, and the axial through hole is in fluid communication with the adsorption plate through the fluid channel. According to the technical scheme, the fluid path for vacuum adsorption or release of the wafer avoids the binding face between the suction cup and the mounting base, small particles are prevented from entering the binding face along with the fluid, the clean and tight binding state between the suction cup and the mounting base is guaranteed, the wafer grinding accuracy is guaranteed, and the wafer grinding quality is improved.

The utility model relates to the technical field of grape juice processing, in particular to a grape pulping and winnowing device which comprises a screening box with an opening in the top face, a cleaning mechanism is arranged on the top face of the screening box, a vibration mechanism is arranged in the screening box, and L-shaped supporting blocks are fixedly connected to the two sides of the top ends of the two opposite side faces of the screening box. A feeding hopper communicating with the interior of the screening box is fixedly connected to one side face of the screening box, an L-shaped plate is fixedly connected between the two opposite side faces of the interior of the screening box, and a plurality of fans are fixed to the side face, corresponding to an opening of the screening box, of the L-shaped plate at equal intervals. According to the utility model, the plurality of fans are arranged below the screen, impurities can be adsorbed on the conveying belt under the action of the air suction pump and the plurality of fans, and small-particle grapes are prevented from being blown into the collecting bin along with the impurities, so that the small-particle grapes do not need to be picked out from the impurities by special personnel; and the working intensity of workers can be reduced.

The invention discloses an insulating layer extruder for cable manufacturing, and belongs to the field of cable manufacturing equipment. The extruder body is fixedly mounted at the upper end of the bracket and comprises a shell; a rotating shaft is arranged in the center of the shell, one end of the rotating shaft penetrates through the shell to be fixedly connected with an output shaft of a transmission, a transmission gear is fixedly connected to an input shaft of the transmission, and the transmission gear is meshed with a gear on an output shaft of a motor fixedly connected to the support. The rotating direction of the spiral plate II is opposite to the rotating direction of the spiral plate I and the rotating direction of the spiral plate III, and the opposite faces of the spiral plate II and the spiral plate I are fixedly connected with movable devices. According to the device, raw materials which are not in a molten state can be pushed to move in the direction of the spiral plate I through rotation of the spiral plate II until the raw materials are in the molten state and then flow to the position of the spiral plate III through the penetrating holes, the situation that the penetrating holes are blocked by small particles, and the flow is affected is avoided, and the raw materials can be stirred through the sliding rod; and uniform heating is ensured.

The centrifugal fan comprises a fan shell, an air inlet, an air guide wheel and an air outlet, the air inlet is formed in the bottom of the fan shell, the air guide wheel is rotationally connected to the upper portion of the air inlet and driven by a motor on the inner wall of the fan shell, the air outlet is formed in the outer wall of the fan shell, and the air outlet is rotationally connected to the upper portion of the air inlet. An energy-saving assembly used for assisting in air inlet is arranged below the air inlet, a separation assembly used for separating diffuse particles and impurities is arranged in the fan shell, the purpose of collecting the particles and the impurities is achieved through the arrangement of the separation assembly, and compared with a traditional centrifugal fan which depends on a simple filter screen or gravity sedimentation and other modes, the energy-saving effect is better. Compared with the prior art, the device has a better separation effect on small particles and impurities with different densities, improves the purity of exhausted gas, achieves the purpose of collecting the particles and the impurities, and avoids the problems of increase of airflow resistance, fluctuation of air volume and air pressure and the like caused by impurity accumulation.