2189results about How to "Reduce adhesion" patented technology

The invention discloses a PCB (printed circuit board) spraying etching machine and a method thereof, belongs to the technical field of spraying etching machines, and provides the following scheme that the PCB spraying etching machine comprises a spraying etching mechanism, a cleaning mechanism is assembled in the spraying etching mechanism, and the spraying etching mechanism comprises etching equipment; the first motor drives the rotating shaft to rotate, the rotating shaft drives the worm and the worm gear to conduct transmission, the polygonal cylinder drives the conveying wheel to rotate, the conveying wheel can achieve the purpose of automatic material conveying, meanwhile, the conveying pump sprays etching liquid to a circuit board through the spraying heads, the angles of the spraying heads are different, and therefore spraying uniformity can be kept, and the spraying efficiency is improved. And the rotating shaft also drives the cam to rotate, so that the cam extrudes the pulley to move, and the cam can be matched with the first spring to realize the reciprocating translational motion of the polygonal cylinder, so that the conveying wheel drives the circuit board to do reciprocating motion, the circuit board can be uniformly etched, and the processing quality of the circuit board is improved.

The invention relates to the technical field of oilfield exploitation, and discloses a nanometer oil-displacing agent for oilfield oil extraction and a preparation method thereof.The nanometer oil-displacing agent takes modified nanometer silicon dioxide and a surfactant as main components, polymer macromolecules are modified on the surface of the nanometer silicon dioxide to serve as a main body of the nanometer oil-displacing agent, and the nanometer oil-displacing agent is prepared. Under the action of the surfactant, the nano silicon dioxide can flow into the fine throat and the micro throat, and the polymer macromolecules of the branched structure can generate a relatively strong interaction force with the rock, so that the polymer macromolecules are firmly adhered to the surface of the rock, the adhesion of crude oil on the surface of the rock is reduced, a smooth crude oil channel is constructed, and the flowing pressure of liquid is reduced; and crude oil fluidity is improved. The structure of the cross-linking agent contains quaternary ammonium cations, so that the electrostatic repulsion effect between nano silicon dioxide can be greatly enhanced, aggregation between nano silicon dioxide and nano silicon dioxide can be avoided, the interfacial tension can be efficiently maintained, the oil-water interfacial tension is greatly reduced, and the recovery rate of crude oil is effectively increased.

The multi-interaction-mode intermediate frequency furnace automatic slag salvaging mechanism comprises a guide rail, an industrial robot and intermediate frequency furnaces, the guide rail is used for bearing the industrial robot, the guide rail is installed between the two intermediate frequency furnaces, furnace openings of the two intermediate frequency furnaces are each provided with a furnace cover, and the interiors of furnace bodies of the intermediate frequency furnaces are used for storing molten iron; a coaxial slag salvaging mechanism is arranged at the tail end of the industrial robot, a slag salvaging spoon is arranged at the bottom of the coaxial slag salvaging mechanism, the slag salvaging spoon is used for salvaging slag, and a slag hopper used for storing the slag is arranged at the bottom of the slag salvaging spoon. The rotation angle of the stepping motor is controlled by an instruction sent by the control system, opening and closing of the slag salvaging spoon can be further controlled, the motion mode of the slag salvaging mechanism is unique and different from the prior art, the slag salvaging mechanism can salvage the slag to the maximum extent, and the problem that in the prior art, the slag salvaging spoon needs to be replaced every day is solved.

The invention discloses an epoxy group modified zwitterionic polymer / heparin composite coating and a preparation method thereof. The preparation method comprises the following steps: firstly, constructing an amino-containing adhesion layer on the surface of a substrate by adopting a dip-coating method; then, the substrate is soaked in a mixed solution of the zwitterionic polymer and the heparin, and grafting of the zwitterionic polymer and the heparin on the surface of the medical material is completed through incubation. The coating provided by the invention has excellent hydrophilicity, can form a hydration layer, provides a physical barrier, and remarkably prevents adhesion and colonization of microorganisms. The inhibition rate of the coating on escherichia coli and staphylococcus aureus exceeds 99%, protein adhesion is remarkably reduced in an anti-protein adhesion experiment, and the coating is simple in strategy design, has a potential application prospect in the aspect of preventing blood contact catheter related infection and thrombosis, and has a wide application prospect. The complication occurrence rate and the medical care cost can be reduced.

The invention relates to lactobacillus crispatus LC30 for preventing and treating female genital tract infection and application of the lactobacillus crispatus LC30. The lactobacillus crispatus LC30 is preserved in the China General Microbiological Culture Collection Center with the preservation number of CGMCC NO.31923. The lactobacillus crispatus LC30 has good hydrogen peroxide production capacity and adhesion capacity, has a strong inhibition effect on main vaginitis pathogenic bacteria, and can be used for preventing and treating female genital tract infection. The composition is effective to nutritional pathogenic bacteria, and can also reduce form transformation and biological membrane formation of the pathogenic bacteria and prevent and treat drug resistance; besides, the fermentation product can reduce the content of pathogenic bacteria metabolites, regulate the secretion of cytokines and achieve the effect of relieving inflammation, so that the fermentation product can be used for preparing products for preventing and treating genital tract pathogenic bacteria infection, preventing and treating vaginitis and / or removing pudendum peculiar smell.

The invention relates to a composite multi-effect scale and corrosion inhibitor and a preparation method thereof, and belongs to the technical field of water treatment agents.The composite multi-effect scale and corrosion inhibitor is prepared from carboxylic acid monomers, sulfonate monomers, organophosphorus compounds, modified chitosan, modified nanometer titania, oxidation type initiators, reduction type initiators, azole derivatives and the like, the modified chitosan is formed by coating the surface of chitosan with cerium chloride; the modified nano titanium dioxide is formed by coating the surface of nano titanium dioxide with sodium polyaspartate. The composite multi-effect scale and corrosion inhibitor is prepared in a mode of compounding while synthesizing, the scale inhibition effect is excellent, the comprehensive descaling capacity can reach 97% or above, and the composite multi-effect scale and corrosion inhibitor can be used for a high-pH, high-alkalinity, high-temperature and high-hardness circulating cooling water system under the high-concentration-multiple operation condition; the method is suitable for circulating cooling water treatment requirements under harsh conditions in industries such as chemical industry, smelting and light industry.

The invention provides a welding device for ship repair, and belongs to the technical field of welding. Comprising a base, a supporting plate is fixedly arranged on the surface of the base, a sliding plate is arranged on the inner wall of the supporting plate in a sliding mode, a welding gun for welding the ship welding position is installed on the surface of the sliding plate, and a cleaning part for cleaning welding slag generated during welding of the welding gun is installed on the surface of the sliding plate; by arranging the cleaning part, welding can be carried out while the whole equipment is moved, welding slag generated by welding at the welding position can be adsorbed during welding, splashing of the welding slag is prevented, a pipeline can be knocked through cooperative work of a motor, a rotating rod, a round wheel, a connecting rod, a sliding block, a downward pressing rod, a torsion spring, a rotating strip, a spring hammer and other components, and therefore the pipeline can be conveniently welded. Welding slag in the pipeline is knocked off due to vibration and sucked away by the fan, cleaning of the welding slag adsorbed to the inner wall of the pipeline is achieved, smoothness of the pipeline is guaranteed, and attachment of the welding slag to the inner wall of the pipeline is effectively reduced.

The invention relates to an anti-icing-deicing composite surface and a preparation method thereof, and belongs to the field of anti-icing and deicing. The surface comprises a porous material substrate, a super-hydrophobic / hydrophobic lubricating fluid top microstructure and a hydrophobic / hydrophilic lubricating fluid internal microstructure, wherein the super-hydrophobic / hydrophobic lubricating fluid top microstructure and the hydrophobic / hydrophilic lubricating fluid internal microstructure are coupled to the surface of the porous material substrate; lubricating fluid is injected into the surface of the hydrophobic / hydrophilic lubricating fluid internal microstructure; the super-hydrophobic / hydrophobic lubricating fluid top microstructure is located on the surfaces of a plurality of columnar bodies arranged on the porous material substrate in an array mode, namely, the super-hydrophobic / hydrophobic lubricating fluid top microstructure has the super-hydrophobic characteristic to water and lubricating fluid. And the hydrophobic / lubricating fluid-loving internal microstructures are also arranged in the array form, surround the root of each cylindrical object, and have the characteristics of lubricating fluid loving and hydrophobicity. The surface can have anti-icing / ice-dredging properties of super-hydrophobic and super-smooth properties at the same time, that is, the surface can have excellent anti-icing properties of a super-hydrophobic surface, and can also be ice-dredging like a super-smooth surface after the surface is iced, so that ice is easier to remove.

The invention provides a probiotic enteric dry suspension as well as a preparation method and application thereof, and relates to the technical field of pharmaceutical preparations. The probiotic enteric dry suspension comprises the following components in parts by mass: 1-8 parts of probiotic powder; 25 to 60 parts of a microcapsule cross-linking system; 1-15 parts of a suspending aid; 20 to 70 parts of a filling agent; 0-0.1 part of a coloring agent; and 0-1 part of an aromatic. According to the invention, when the probiotic powder is dispersed in water by utilizing the gelling property of sodium alginate, the probiotic powder is wrapped to form a probiotic-sodium alginate compound, citric acid and calcium carbonate are subjected to an acid-base reaction, and generated carbon dioxide bubbles can prevent the probiotic-sodium alginate compound from agglomerating; meanwhile, the released calcium ions and chitosan interact with the probiotic-sodium alginate compound, a compact probiotic microcapsule structure is rapidly and stably formed in one step, the probiotics in the microcapsule are effectively protected from being damaged by gastric acid and bile, the survival rate of the probiotics is increased, and the enteric effect is achieved.

A rotary excavating drill bit facilitating soil unloading comprises a rotary excavating drill bit body, the rotary excavating drill bit body comprises a drilling barrel, a horizontally-arranged partition plate is fixed to the upper side of the interior of the drilling barrel, an inner cavity of the drilling barrel is divided into an upper equipment cavity and a lower working cavity through the partition plate, a rotating part is installed in the equipment cavity, and a soil scraping assembly is installed in the working cavity; the rotating part comprises a transmission column and a lower circular plate which are coaxially arranged with the drilling barrel, the transmission column is rotationally connected with the drilling barrel, the top of the transmission column extends out of the drilling barrel, a connecting base connected with a drilling rod of the rotary drilling rig is fixed to the top of the transmission column, the lower circular plate is fixed to the bottom of the transmission column, and a through hole matched with the lower circular plate in size is formed in the middle of the partition plate. The lower circular plate is mounted in the through hole, and the lower circular plate is in sliding connection with the inner wall of the through hole; according to the utility model, scraping cleaning and vibration cleaning can be carried out on a soil layer in the drill cylinder, the residual quantity and adhesion phenomena of soil in the drill cylinder are greatly reduced, and the soil unloading efficiency is obviously improved.

The invention provides outdoor portable sound equipment, and particularly relates to the technical field of sound equipment, the outdoor portable sound equipment comprises a sound equipment main body, a volume knob is arranged on one side of the top surface of the sound equipment main body, two sounding horns are symmetrically arranged on the surface of one side of the sound equipment main body, and four supporting legs are uniformly and fixedly arranged at the bottom of the sound equipment main body. Through the cooperation of components such as the gear and the gear ring, after the sound equipment main body is used, no matter how many angles a user rotates the volume knob clockwise to increase the volume of the sound equipment main body, after the sound equipment main body is used, the volume knob is driven to rotate anticlockwise through the rotation of the gear ring, so that the volume of the sound equipment main body is increased. Therefore, the sound volume is prevented from being in the maximum state when the sound main body is turned off, and when the sound main body is turned on and used next time, the sound production element in the sound main body is not suddenly in the full-load state, so that the sound production element in the sound main body is protected, and the service life of the sound main body is prolonged.

The invention provides a method for reducing polymer adhesion in ethylene oligomerization. According to the method, a double-kettle series polymerization process is adopted, a phosphine-nitrogen ligand, a chromium metal compound and a cocatalyst are added into a first reaction kettle, a nucleating agent is added into a second reaction kettle, the reaction is carried out in the first reaction kettle in the early stage and transferred to the second reaction kettle in the later stage for continuous reaction, oligomer is converted into high polymer through the nucleating agent, and the high polymer is stored in a particle form; therefore, the phenomenon that the oligomer winds the stirring paddle is reduced or avoided, the aggregation of the polymer in the reaction kettle is greatly reduced, and the operation time of the device is prolonged. The catalytic system can catalyze the ethylene oligomerization reaction with high activity, the catalytic activity reaches up to 10 * 10 < 6 > g product / (molCr.h), the overall selectivity of 1-hexene and 1-octene with high added values can reach 90% or above, and the phenomenon that a polymer is hung on a stirring paddle is greatly reduced.

The invention relates to a chenille waterproof floor mat and a production process thereof, a base cloth used by the chenille waterproof floor mat is modified, namely polyacrylic acid is used as an adhesive, antibacterial water-absorbing microspheres are arranged into the base cloth to prepare the modified base cloth, and the antibacterial water-absorbing microspheres have good water-absorbing performance and antibacterial performance, so that the antibacterial water-absorbing microspheres have good water-absorbing performance and antibacterial performance. The chenille waterproof floor mat can rapidly absorb water and maintain the antibacterial performance in the using process, modified polyester is prepared and used as a raw material to prepare modified polyester filaments, then the modified polyester filaments serve as decorative yarn of chenille yarn, and due to the fact that the modified polyester contains zwitter-ion side chains, the antibacterial performance of the chenille waterproof floor mat is improved, and the antibacterial performance of the chenille waterproof floor mat is improved. The chenille yarn has the anti-fouling and anti-bacterial performance, the hydrophilic performance of the chenille yarn is improved, and then the chenille waterproof floor mat has the good water-absorbing, anti-bacterial and anti-fouling performance.

The invention discloses an independent manipulator for a high-temperature environment and a preparation device thereof, and relates to the technical field of manipulators, the independent manipulator comprises a U-shaped frame, a rack and a machining mechanism, a rotator is mounted in the middle of the bottom of the U-shaped frame, a large arm is mounted at the rotating end of the bottom of the rotator through a connecting plate, and a small arm is hinged to the bottom end of the large arm; the machining mechanism comprises a connecting sliding block and a hydraulic cylinder, a round roller is installed at an opening in the outer side of the connecting sliding block in a rolling mode, and a servo motor is installed at the position, close to the round roller, of the outer side of the connecting sliding block. A grinding belt is installed in the middle of the outer circle face of the round roller, and a stirring pin is fixedly installed on the side, away from the servo motor, of the outer circle face of the grinding belt. According to the independent manipulator for the high-temperature environment and the manufacturing device of the independent manipulator, the anti-falling effect is achieved, grabbing is firm, falling is not likely to happen, a polishing device can be adjusted, and polishing is accurate.

The invention discloses a preparation method and application of polyvinyl alcohol assisted molded aramid nanofiber aerogel. The preparation method of the aerogel comprises the following steps: pulping aramid pulp, homogenizing and centrifuging to obtain an aramid nanofiber aqueous dispersion; dissolving polyvinyl alcohol in deionized water to obtain a polyvinyl alcohol aqueous solution; and mixing the aramid nanofiber aqueous dispersion and the polyvinyl alcohol aqueous solution, placing the mixture in a container, and carrying out liquid nitrogen unidirectional freezing, freeze drying and low-temperature heat treatment to obtain the aerogel. According to the aerogel prepared by the method, due to the physical winding effect of a polyvinyl alcohol polymer chain and the chemical combination effect of a hydrogen bond, dispersion of the aramid nanofiber in a water-based solvent is synergistically promoted; therefore, the phenomena of agglomeration and adhesion, non-uniform forming, slag and powder falling and the like caused by Van der Waals interaction, hydrophilic and hydrophobic interaction and the like among the adjacent aramid nanofibers in the freezing casting process are avoided; the aramid nanofiber in the aerogel subjected to low-temperature heat treatment is close to single distribution, and a viscous polyvinyl alcohol molecular chain is converted into a conjugated carbon chain, so that the mechanical properties of compression, stretching and the like of the aerogel are remarkably improved. In addition, the aerogel can be used as a wave-absorbing material after being carbonized at a high temperature, has the advantages of thin thickness and light weight, and has the wave-absorbing capability of wide frequency band and strong absorption.

The invention provides a dry-method electrode film and a preparation method thereof, a dry-method electrode and a battery, and particularly relates to the technical field of secondary batteries. The dry-method electrode film comprises an active material, a conductive agent and a binder, the binder comprises a first binder and a second binder; the first binder is polytetrafluoroethylene; and the melting point of the second binder is less than 120 DEG C. A second binder is introduced in the electrode material mixing process, heat energy generated by mechanical mixing can soften the second binder, small particles are bonded together, the surface energy of the electrode material is improved, the agglomeration or mixing behavior of the electrode particles in the dry mixing process is driven, and a dry-method membrane with high strength and high adhesive force with a current collector is formed; and on the other hand, the second binder can be softened at a relatively low temperature in the hot-pressing compounding process of the current collector, and is compounded with the current collector more tightly, so that the peel strength between the electrode film and the current collector is optimized, and the cycling stability and the electrochemical performance of the battery are improved.

The invention relates to the technical field of coating stirring tank detection, in particular to a detection device for the inner wall of a special coating stirring tank, which comprises a device seat, a positioning mechanism, a wall scraping assembly and a test piece, the device seat is connected with a rotating seat, the rotating seat is rotatably connected with a threaded rod, and the threaded rod is in threaded connection with a lifting sheet; a limiting rod is arranged on the outer side of the threaded rod, a second tooth piece is arranged on the bottom side of the rotating base, a first tooth piece is connected to one side of the second tooth piece, and a first arc-shaped clamp is installed on one side of the device base. According to the scheme, the possibility that residual impurities are attached to the inner wall of the tank body for a long time is reduced, and the possibility that paint corrodes the tank body for a long time is reduced; the secondary cleaning effect of the device on the inner wall of the cleaned tank body is improved, cleaned impurities can be collected, so that the cleaning effect of the cleaning equipment can be detected, multifunctional detection on the interior of the tank body is also improved, and whether corrosion is generated in the inner wall or not can be distinguished.

The invention relates to the field of polystyrene auxiliaries, and particularly discloses a coating agent for expandable polystyrene as well as a preparation method and application of the coating agent. The coating agent for expandable polystyrene is prepared from the following raw materials in parts by weight: 28 to 42 parts of mono / diglycerol fatty acid ester, 32 to 42 parts of triglyceride, 22 to 32 parts of stearate, 1 to 5 parts of ethylene bis stearamide and 2 to 3 parts of polyvinyl alcohol, and the granularity of the raw materials is 300 to 325 meshes. The coating agent provided by the invention can be used for light-grade, flame-retardant and common-grade expandable polystyrene, and can reduce adhesion and agglomeration among expandable polystyrene particles, enhance the demolding effect and reduce volatilization and loss of a foaming agent and an auxiliary agent.

According to the forming mold for preparing the sealing ring in the field of injection molds, through a pair of mold discs arranged on the outer side of a left mold cylinder and the outer side of a right mold core and spraying assemblies arranged in the mold discs and capable of stretching into an annular mold cavity, when a release agent is sprayed, a rotating mechanism drives the mold discs to rotate; according to the mold, the injection pipe does composite movement of transverse movement and circular movement through the rotation of the left mold cylinder and the right mold core, the release agent is uniformly sprayed to the inner wall of the annular mold cavity, meanwhile, the release agent on the inner wall of the annular mold cavity is uniformly spread on the inner wall of the annular mold cavity under the action of centrifugal force through the rotation of the left mold cylinder and the right mold core, and the distribution uniformity of the release agent is further improved; and besides, during demolding operation, the injection pipe synchronously rotates and extrudes the two sides of the sealing ring blank in the annular mold cavity, so that rotary stripping of the sealing ring blank is achieved, the conditions of adhesion and damage of the sealing ring blank are reduced, and the demolding quality is improved.

The plate-type temperature adjusting equipment comprises a box body, a plate-type temperature adjuster and a scale wiping unit, the plate-type temperature regulator and the scale wiping unit are arranged in the box body, liquid is contained in the box body, and the plate-type temperature regulator is used for being immersed into the liquid to regulate the temperature of the liquid; the plate-type thermolator is provided with a plurality of plate-shaped fluid channels which are arranged side by side at intervals from front to back, a fluid inlet hole and a fluid outlet hole are formed in the front side and the rear side of each plate-shaped fluid channel respectively, and the fluid inlet holes and the fluid outlet holes are formed in the positions, close to the left side and the right side, of the plate-shaped fluid channels respectively. And a scale wiping unit is arranged in a gap between every two adjacent plate-shaped fluid channels, and the scale wiping units continuously do reciprocating motion in the gaps through a driving unit to disturb the side walls of the plate-shaped fluid channels, so that scaling is prevented. According to the plate type temperature adjusting equipment, the temperature of fluid is adjusted, and meanwhile impurities possibly causing crystallization and scaling are removed.

The invention discloses homogeneous stirring equipment for preparing cold water fish feed grease, and relates to the technical field of stirring, and the homogeneous stirring equipment comprises a bin body mechanism. According to the homogenizing and stirring equipment for preparing the cold water fish feed grease, through the design of the bin body mechanism, materials enter from the top of the processing mechanism, circulate and enter the bin body shell, then a motor is started, a central rotating shaft is controlled by the motor to rotate, and the interiors of the materials are rotated by paddle plates, so that the effect of mixing the materials is achieved; through the design of the multiple paddle plates, the stirring range is enlarged, the mixing efficiency is improved, the uniform mixing effect is achieved, the paddle plate grooves are formed, the rotating efficiency is improved through the grooves, the grooves can disturb boundary layers on the surfaces of the paddle plates, resistance is reduced, the flowing efficiency of fluid is improved, and therefore the stirring effect of the paddle plates in the fluid is enhanced; cavitation and cavitation phenomena are reduced, the possibility of generating cavitation and cavitation under high-speed movement is reduced, and the service life of the paddle board is prolonged.

The invention discloses a heading machine capable of synchronously reducing peripheral pollution, and relates to the technical field of heading machine equipment, the heading machine comprises a heading machine main body and a dust collecting pipe fixedly mounted at the top of the heading machine main body, and further comprises a glove box fixedly mounted on one side of the bottom of the dust collecting pipe, and a collecting assembly is arranged in the middle of the interior of the dust collecting pipe; a spraying assembly is arranged on the side, close to the collecting box, of the interior of the dust collecting pipe. The collecting assembly comprises a motor and a rotating shaft, and fan blades and a main gear are sequentially connected to the outer side of the rotating shaft; the spraying assembly comprises mounting blocks which are symmetrically arranged, sliding rods are fixedly connected to the inner sides of the two mounting blocks, and the problems that when a multi-drill-bit heading machine is used, the drilling position is difficult to be completely sealed, dust still escapes all around, and the surrounding environment is polluted are solved; the condition that dust is not completely cleaned still possibly exists, and the dust falling effect of the device is reduced.

The invention discloses a comprehensive silt treatment method for a water conservancy project, and belongs to the field of silt treatment. A comprehensive silt treatment method for a water conservancy project comprises the following steps that firstly, treatment equipment is moved to the position of silt to be treated, and the silt is pumped into the treatment equipment through an underflow pump; 2, the treatment equipment can stir the silt, so that floating objects attached to the silt are separated from the silt; thirdly, the separated floating objects can float on the liquid level, and the treatment equipment can fish and collect the floating objects; 4, the size of the discharging position of the floating object is adjusted according to the height of the liquid level, the discharging speed of the sediment is adjusted, and the height of the liquid level is controlled; the problems that floating objects in silt are inconvenient to treat, separation of impurities such as stones is affected, silt recycling is not facilitated, the dehydration efficiency is low, and the conveying cost is high can be solved.

The chip removal machine comprises a chip removal machine body, the chip removal machine body is provided with a containing cavity, an inlet end and an outlet end, the inlet end and the outlet end communicate with the containing cavity, the inlet end is used for communicating with a chip removal opening of the numerical control machine tool so that the cooling liquid can flow in, and the outlet end is used for discharging the metal chips; the conveying component is arranged in the containing cavity and located between the inlet end and the outlet end so as to convey the metal cuttings. The containing box communicates with the containing cavity so that the cutting fluid in the containing cavity can flow into the containing box. And the bubble generator comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe communicates with the containing box, the liquid outlet pipe communicates with the containing cavity, and the bubble generator is used for injecting gas into the cutting fluid flowing into the bubble generator to generate the cutting fluid with bubbles and injecting the cutting fluid with the bubbles into the containing cavity. Through the innovative bubble cleaning technology and the reasonable structural design, the problem that in the prior art, the chip removal effect of a chip removal machine is poor is effectively solved.

A method for increasing the yield of an artemisinin crude product belongs to the technical field of artemisinin extraction, and comprises the following steps: an extraction step: adding artemisia apiacea leaves into a petroleum ether solvent, and extracting by combining heating stirring, ultrasonic waves or microwaves; a separation step: carrying out liquid-solid separation by adopting a filtering or centrifuging mode to obtain an artemisinin extracting solution containing artemisinin; a concentration step: evaporating and concentrating the artemisinin extracting solution to obtain an artemisinin concentrated solution; a crystallization step: putting the artemisinin concentrated solution into a crystallization tank for crystallization, and filtering after crystallization to obtain a mother solution and an artemisinin crude product; the crystallizing tank is a cold and hot crystallizing tank provided with a refrigerant ring cavity and a heating medium ring cavity at the same time, the artemisinin extracting solution on the upper portion can be rapidly cooled, meanwhile, the artemisinin extracting solution on the lower portion is kept at the constant temperature, impurities attached to low-temperature crystals can be reduced, the crystallizing speed is increased, and the crystallizing recovery rate of the artemisinin crude product is increased.

The invention discloses a pretreatment device for air separation and a treatment method thereof, and relates to the technical field of air treatment.The pretreatment device comprises a treatment box, a discharge pipe is connected to one side of the bottom of the treatment box in a penetrating mode, a connecting pipe is connected to the bottom of the discharge pipe in a penetrating mode, and a filter screen is fixedly installed on one side of the interior of the treatment box; a mounting groove is formed in the other side of the interior of the treatment box, an activated carbon filter screen is connected to the interior of the mounting groove in a matched mode, the treatment assemblies are arranged in the treatment box and on the top of the treatment box, each treatment assembly comprises a driving motor and a positioning assembly, and the two treatment assemblies are symmetrically arranged on the front face of the treatment box; according to the air purifier, air can be filtered, dust and impurities in the air can be prevented from being attached to the filter screen while the air is treated, the dust and the impurities can be cleaned, disassembly is avoided, the filter screen is more convenient to clean, an activated carbon filter screen is convenient to clean or replace, and convenience and practicability are improved.

The invention relates to the technical field of raw material crushing, in particular to a raw material crushing device for preparing a fruit preservative. Comprising a base which is provided with a driving module; the outer cylinder is rotationally connected to the base, and a lining plate layer is fixedly connected to the inner side of the outer cylinder; the multiple fixing shells are fixedly connected to the outer cylinder and fixedly connected with the lining plate layer, the fixing shells are slidably connected with baffles, the baffles are in ball joint with spline rods, and the spline rods are in threaded connection with spiral sleeves; the sliding piece is fixedly connected to the spiral sleeve; and the limiting ring is fixedly connected to the base and is in sliding connection with the sliding piece. By changing the moving distance of the baffle and increasing the contact area of the baffle and a mixture, the probability that materials collide with a crushing medium is increased, the material crushing force is increased, the reduction of the particle size of the materials is accelerated, and the effect of controlling the particle size of the crushed materials is achieved.

The present invention provides a precise proportioning fermentation device for tricholoma matsutake beverage production, and relates to the technical field of beverage proportioning fermentation, the precise proportioning fermentation device comprises a mixed fermentation mechanism, the mixed fermentation mechanism can be used for preparing a beverage and storing the prepared beverage, the mixed fermentation mechanism is arranged at the top of the mixed fermentation mechanism, and the conveying mechanism is arranged at the bottom of the mixed fermentation mechanism. Raw materials are injected into the mixed fermentation mechanism from the conveying mechanism, the proportioning mechanism is arranged above the conveying mechanism, and the proportioning mechanism extends into the conveying mechanism and is matched with the conveying mechanism to control the injection amount of the raw materials. During use, the internal volume of the metering cylinder is changed through the volume piston in advance, then raw materials are fully injected into the metering cylinder through the feeding pipe, then the bottom of the metering cylinder is driven to exceed the bottom of the proportioning pipe for discharging, and the feeding pipe is sealed through the outer surface of the metering cylinder to avoid leakage; meanwhile, the flow speed of the raw materials in the metering cylinder is increased through extrusion of the volume piston, and the effect of improving the fermentation matching accuracy is achieved.

The invention provides a preparation method of an ETFE fluorofilm plate with excellent comprehensive performance, and belongs to the technical field of manufacturing of high-performance building materials. According to the preparation method, a metal plate plated with an aluminum-zinc alloy film layer serves as a substrate, and the upper surface and the lower surface of the substrate are each provided with a composite plating layer. The composite coating comprises a silicon dioxide-carbon tube coating, an indium tin oxide coating, a wear-resistant layer, an ETFE fluorine film layer and a wear-resistant hydrophobic layer. The ETFE fluorine diaphragm plate prepared by the method not only has excellent corrosion resistance and excellent heat insulation performance, but also has good scratch-resistant protection and weather resistance, and particularly, the coated wear-resistant hydrophobic layer effectively reduces the adhesion of moisture on the surface of the diaphragm plate, improves the self-cleaning performance of the diaphragm plate, reduces the maintenance cost, and is suitable for large-scale popularization and application. The introduction of the layer not only protects the surface of the film, but also enhances the stability of the film in the long-term use process. The ETFE fluorine film plate prepared by the method is suitable for various high-performance building requirements, and shows a wide application prospect.

The invention discloses an atmospheric particulate sampling cutter and sampling equipment. The sampling cutter comprises a cutter body used for collecting gas and an outer cleaning assembly arranged on the outer side of a sampling cover, and the outer cleaning assembly can clean the outer side of the cover wall of the sampling cover through a cleaning brush; the sampling device further comprises an inner cleaning assembly arranged in the sampling cover, and the inner cleaning assembly can conduct air blowing cleaning on the cover wall of the sampling cover through a cleaning pipe in the sampling cover. The sampling cover cleaning device has the beneficial effects that by arranging the inner cleaning assembly and the outer cleaning assembly in the scheme, the sampling cover is subjected to double cleaning in different cleaning modes on the inner side and the outer side respectively. According to the scheme, the sampling brush is used for brushing and sweeping the outer wall of the sampling cover, and large sundries isolated on the outer side of the sampling cover can be only brushed away. According to the scheme, the cleaning pipe is matched with the fan, airflow blowback is carried out in the sampling cover from inside to outside, blockages in meshes of the sampling cover are removed, and meanwhile the adhesive force of sundries on the outer wall of the sampling cover is reduced.