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32results about How to "Uniform diameter" patented technology
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Fiber concrete preparation device
ActiveCN222178239UUniform diameterwell mixedMixing operation control apparatusCement mixing apparatusFiberMechanical engineering
The utility model relates to a fiber concrete preparation device, and belongs to the technical field of concrete preparation, the fiber concrete preparation device comprises a shell, the shell is fixed on the ground through a support, the top end of the shell is provided with a first feed inlet and a second feed inlet, a first rotating rod and a stirring rod are arranged below the first feed inlet, and a second rotating rod and a stirring rod are arranged below the second feed inlet; the first rotating rod and the second rotating rod are each provided with a plurality of stone rolling knives, a fiber material and a concrete material which are stirred and rolled are filtered through the screen, then a mixture is stirred through the stirring stick, a water outlet is formed in the stirring stick, and the mixture obtained after the mixture is fully stirred is conveyed to the discharging port through the propeller. The concrete preparation device has the effects that the interior of the device can be cleaned at any time, so that adhesion and accumulation of concrete on the device are reduced, and waste of raw materials is reduced.
Owner:LANGFANG ZELONG CONCRETE CO LTD
A wind turbine blade material degradation and recycling device
ActiveCN118719769Bachieve smashReduce volatilitySolid waste disposalTransportation and packagingMaterial DegradationAir filter
The invention discloses a wind turbine blade material degradation and recycling device in the technical field of wind turbine blade recycling, comprising a preheating tank and a Stirling engine, wherein the inner wall of the preheating tank is provided with a preheating chamber; the input end of the Stirling engine is connected with the preheating chamber, and the output end of the Stirling engine is provided with a crushing mechanism for crushing the wind turbine blades; a wind selection mechanism for screening wind turbine blade fragments is provided below the preheating tank, the wind selection mechanism comprises a base, a wind selection channel and a wind selection chamber are provided in the base, a recovery plate is provided in the wind selection chamber, a plurality of screening holes are provided on the recovery plate, and the screening holes are successively reduced in order from top to bottom; a fan is provided on the side of the recovery plate away from the wind selection channel, a heating chamber is further provided below the recovery plate, and an insulating mechanism for sealing the heating chamber is provided between the heating chamber and the recovery plate; the reuse rate of heat energy is improved by the Stirling engine and the wind selection mechanism, the wind turbine blades are preheated, and the processing efficiency of the blades is improved.
Owner:JIANGSU UNIV OF TECH +1
Efficient cellucotton production equipment
The invention discloses efficient cellucotton production equipment, and relates to the technical field of cellucotton production. The efficient cellucotton production equipment comprises a bottom frame, a melting and blowing mechanism is installed in the middle of the upper side of the bottom frame and used for melting quartz lines and blowing the quartz lines into quartz wool, a plurality of conveying mechanisms are evenly arranged on the surface of the upper side of the bottom frame with the melting and blowing mechanism as the circle center and around the melting and blowing mechanism at equal angles, and the conveying mechanisms are the same in structure; the conveying mechanism is used for conveying the quartz rods and comprises a conveying roller, the front end and the rear end of the conveying roller are rotationally connected with a support fixedly connected to the bottom frame respectively, a rotating rod is arranged on the upper side of the conveying roller in parallel, and the front end and the rear end of the rotating rod are rotationally connected with the corresponding positions of the support respectively; the position of the contact point of the pressing roller is automatically adjusted according to the diameter of the conveyed quartz rod, the pressing roller is tightly attached to the quartz rod in the whole process, and therefore it is guaranteed that the quartz rod is effectively conveyed by the conveying roller, and the quartz rod does not need to be independently adjusted.
Owner:HENAN SHENJIU TIANHANG NEW MATERIAL CO LTD
Method for producing silicon carbide ceramic fibers combining sol-gel and dry spinning
ActiveCN117888234Blow costShort manufacturing cycleArtificial thread manufacturing machinesInorganic material artificial filamentsCarbide siliconFiber
The application discloses a method for preparing silicon carbide ceramic fibers by combining sol-gel and dry spinning. The method comprises the following steps: 1) after preparing a second silicon-based sol, a spinning aid is added to prepare a spinnable silicon-based sol; 2) the spinnable silicon-based sol is prepared into fiber filaments by using a dry spinning process; 3) the fiber filaments are cracked into silicon-carbon-oxygen fibers; and 4) the silicon-carbon-oxygen fibers are sintered into silicon carbide ceramic fibers. The method is different from a mainstream polycarbosilane precursor method for preparing silicon carbide ceramic fibers, does not need a non-melting treatment process, has the advantages of adjustable composition, low raw material cost and simple process and the like, and has important significance for low-cost preparation of silicon carbide ceramic fibers.
Owner:ZHEJIANG SCI-TECH UNIV
A split seal pipe coupling
ActiveCN224622440UReduce transportation problemsNot affected by inner wall diameter
This utility model relates to the field of oil transportation technology, and in particular to a detachable sealed piping connector, comprising a first pipe body and a second pipe body. A first mounting plate and a second mounting plate are respectively fixedly connected to the outer walls of the first and second pipe bodies, and the first and second mounting plates are connected by bolts and threads. The first and second pipe bodies are provided with insertion mechanisms, and the outer walls of both the first and second pipe bodies are sealed to a first sealing gasket. This detachable sealed piping connector, through the cooperation of the insertion mechanism and the first and second mounting plates, enables the installation of the first and second pipe bodies. Because the insertion holes and inserts on the insertion mechanism are machined on the outer walls of the first and second pipe bodies, the inner wall diameter is not affected during the fit, ensuring consistent inner wall diameter and reducing problems caused by diameter discrepancies during oil transportation.
Owner:DAQING BAOHE PETROLEUM TECH CO LTD
A heating wire, its preparation method and application
This invention belongs to the field of nanomaterials technology, specifically relating to a heating wire, its preparation method, and its application. The method for preparing the heating wire provided by this invention involves impregnating filamentous carbon nanotube fibers in a graphene-containing resin dispersion and then curing it. The resin layer containing graphene material encapsulates the filamentous carbon nanotube fibers. The filamentous carbon nanotube fibers prepared by this invention exhibit stable heating. When used in the heating system of a gas element analyzer, the heating wire exhibits low electromagnetic radiation and minimal interference with the hardware, making it more suitable for high-precision testing. The filamentous carbon nanotube fibers prepared by this invention have the advantages of stable heating and resistance to oxidation. The resin layer encapsulating the filamentous carbon nanotube fibers protects the carbon nanotubes, isolates them from air, and extends the service life of the heating element's carbon nanotubes.
Owner:JIANG SU ZHEN XI KE JI YOU XIAN GONG SI
Preparation method and application of high-efficiency emergency antibacterial dressing
PendingCN122643490AGood moisture absorption and air permeabilityImprove breathabilityFreeze-dryingWound.exudate
The application provides a preparation method and application of a high-efficiency emergency antibacterial dressing and belongs to the technical field of biomedical materials. The high-efficiency emergency antibacterial dressing is prepared through a systematic process of alcohol-free wet spinning, secondary traction stretching, vacuum freeze drying, semi-dry state rapid carboxymethylation and needle punching / water jetting into cloth. The high-efficiency emergency antibacterial dressing has high mechanical strength and strong liquid absorption capacity, can absorb a large amount of wound exudate and keep the wound moist, and realizes the synergistic effect of multiple functions such as emergency, anti-adhesion, strong stability, antibiosis and repair promotion.
Owner:HUAZHONG AGRI UNIV
Compact winding pipe heat exchanger
ActiveCN224246820Ushorten the lengthEasy to assembleStationary tubular conduit assembliesHeat exchanger casingsInterior spacePhysics
A compact type winding pipe heat exchanger comprises a shell pass cylinder, a winding pipe, a winding pipe and a winding pipe, the two tube plates are respectively arranged at the upper end and the lower end of the shell pass cylinder; the central cylinder is vertically arranged in the shell pass cylinder; the heat exchange tubes are arranged in the shell pass barrel, and the two ends of each heat exchange tube are supported on the corresponding tube plates respectively; the two tube boxes are provided with tube pass connecting tubes and are respectively arranged on the corresponding tube plates; the lower portion of the center cylinder is hollow to form a first channel with the bottom open, and a first through hole is formed in the side wall of the first channel so as to communicate the first channel with the inner space of the shell pass cylinder. The upper part of the central cylinder is hollow to form a second channel with an open top; a second through hole is formed in the side wall of the second channel; meanwhile, shell pass connecting pipes are arranged on the two pipe boxes, and the shell pass connecting pipes are communicated with the bottom opening of the corresponding first channel and the top opening of the corresponding second channel through connecting pipes of the shell pass connecting pipes. The axial length of the heat exchanger is reduced while the heat exchange effect is guaranteed.
Owner:ZHENHAI PETROCHEMICAL JIANAN ENGINEERING CO LTD
Method for manufacturing prestressed ultrahigh-strength steel strand
Owner:天津腾海科技发展有限公司
Preparation process and system of superfine fiber non-woven fabric based on regenerated cellulose
PendingCN119571543AUniform diametermeet needsArtificial filament washing/dryingTextile/flexible product manufacturePolymer scienceFiber diameter
The invention discloses a preparation process and system of superfine fiber non-woven fabric based on regenerated cellulose, and belongs to the technical field of non-woven fabric production. On one hand, the invention provides a preparation process which comprises the working procedures of filtering, spinning, blowing, spraying, spunlacing, drying and the like, and solves the problems that in the preparation process of the superfine fiber non-woven fabric, the fiber bonding degree is high, films are formed in more areas, the number of monofilaments in the non-woven fabric is small, and part of monofilaments are embedded in the films, so that the non-woven fabric is difficult to deform. Part of monofilaments are highly crossed and bridged among the films; on the other hand, an adaptive preparation system is provided, and orderliness, controllability and stability of the preparation process are guaranteed; finally, the melt-blown non-woven fabric of the superfine fibers is obtained, and in the obtained melt-blown non-woven fabric of the superfine fibers, the fibers are fine and soft, the diameters of the fibers are uniform, and diameter distribution is concentrated.
Owner:YIBIN GRACE GROUP CO LTD +1
A static electrospinning embedded guava peel flavonoids sustained-release composite fiber membrane and a preparation method thereof
A slow-release composite fiber membrane for encapsulating passion fruit peel flavonoids by electrospinning and its preparation method are disclosed. The composite fiber membrane is prepared by coaxial electrospinning and consists of a core layer and a shell layer. The core layer is a carrier solution containing passion fruit peel flavonoids, and the shell layer is a biodegradable polymer solution. The composite fiber membrane has an encapsulation rate of ≥85% for passion fruit peel flavonoids and possesses antioxidant and slow-release properties. Chitosan, gelatin, zein, and β-cyclodextrin are used as spinning wall materials, and passion fruit peel flavonoids extracted by DES method are used as the functional core material. Efficient encapsulation, controlled release, and stabilization of flavonoids are achieved through coaxial electrospinning. This invention solves the problems of easy oxidation, photothermal instability, poor water solubility, and low bioavailability of flavonoids.
Owner:GUANGDONG UNIV OF PETROCHEMICAL TECH
Necking method for N-type 12-inch seeding in czochralski method single crystal
PendingCN119571443AEfficient exclusionUniform diameterPolycrystalline material growthBy pulling from meltCzochralski methodSingle crystal
The invention discloses a necking method for N-type 12-inch seeding in czochralski single crystal. The necking method comprises the following steps: step 1, determining a seeding starting period before necking; and 2, monitoring the change of the diameter of the crystal bar during seeding to obtain to-be-measured diameters with different lengths, judging the size relationship between the to-be-measured diameters and the target diameter, and determining the pulling speed during seeding until the to-be-measured diameters are consistent with the target diameter. The pulling speed is automatically controlled, dislocation is effectively eliminated, it is guaranteed that necking is smooth during seeding, the diameter of the guided fine grains is uniform, and the oxidation coloring phenomenon is avoided.
Owner:LESHAN JINGYUNTONG NEW MATERIAL TECH CO LTD
A method for preparing micron-sized spherical covalent organic framework COFs material by seed crystal method
The present invention relates to a method for preparing micron-sized spherical covalent organic framework COFs materials by a seed method: dissolving aldehyde organic ligands and amine organic ligands in acetonitrile, adding acetic acid solution and shaking, standing at room temperature for 3-24 h, and obtaining different types of seed crystals; weighing a certain amount of aldehyde organic ligands and amine organic ligands, respectively dissolving them in acetonitrile solution containing acetic acid, and obtaining aldehyde organic ligand growth liquid and amine organic ligand growth liquid; transferring the synthesized seed crystals to a beaker and ultrasonically dispersing them, and then injecting aldehyde organic ligand growth liquid and amine organic ligand growth liquid into the beaker at the same time every 10-60 min, shaking evenly and standing, and repeating the above operation until the COFs spherical particle size reaches the required requirement (3-5 μm). The method solves the technical bottleneck of the current lack of uniform spherical COFs preparation method that meets the chromatographic column packing size requirements (≥ 3 μm), while avoiding the high back pressure problem and promoting compatibility with commonly used chromatographic instruments.
Owner:HENAN UNIVERSITY
In-situ growth of mog carbon nanofiber catalyst, preparation method and application thereof
The application discloses an in-situ growth MOG carbon nanofiber catalyst and a preparation method and application thereof, and comprises the following steps: stirring and mixing a nanofiber polymer and a solvent to obtain a uniform spinning liquid; performing electrostatic spinning to obtain a nanofiber membrane; adding a metal salt, a nitrogen-containing compound and resorcinol into water, slowly adding formaldehyde into the mixed solution to obtain an in-situ growth solution of a metal organic gel MOG; placing the nanofiber membrane into the in-situ growth solution to adjust a pH value, and performing in-situ growth by heating to obtain a MOG nanofiber membrane material; and performing high-temperature pyrolysis of the MOG nanofiber membrane material and urea in an inert atmosphere to dope nitrogen, thereby obtaining the MOG-CNF catalyst. The catalyst can effectively reduce overpotential of ORR and OER reactions, improve catalytic stability, and present stable and excellent dual-function electrocatalytic performance. Through a nano structure and a synergistic catalytic effect, the catalyst has a wide application prospect in the field of fuel cell energy storage and conversion.
Owner:XINYU UNIV
Winding roller clamping assembly for medicinal composite film production equipment
The invention relates to the technical field of medicinal composite film winding, in particular to a winding roller clamping assembly for medicinal composite film production equipment. Comprising a bottom plate, first supporting frames and a first guide roller, the two first supporting frames are arranged at the top of the bottom plate, the first guide roller is rotationally arranged between the two first supporting frames, rotating frames are connected to the two first supporting frames, and a second guide roller used for guiding a composite film is rotationally connected between the rotating frames. Through cooperation of an arc-shaped block, a sliding rod, a first spring, a limiting cylinder, a supporting plate, a sliding frame, a cutting knife, a driving mechanism and a moving mechanism, a composite film can be automatically cut off through the cutting knife, and the device can assist in pressing a new composite film end opening to the outer surface of a winding drum; when the winding drum is used for winding, the port of the composite film can be prevented from being folded on the outer surface of the winding drum, so that damage or poor winding of the composite film caused by folding during winding is avoided, and the diameter of the whole film roll on the winding drum can be uniform.
Owner:SHANXI GUANGHUAYUAN MEDICINAL PACKAGING
Chenille yarn low-damage winding machine
ActiveCN224172205Uavoid entanglementguaranteed qualityFilament handlingWinding machineElectric machine
The utility model discloses a chenille yarn low-damage winding machine, which relates to the technical field of spooling and comprises a winding mechanism, the winding mechanism comprises a mounting table, one side of the top of the mounting table is fixedly connected with a guide roller, and the other side of the top of the mounting table is provided with an electrostatic eliminating roller. In the winding mechanism, the static electricity eliminating roller is matched with the static electricity eliminating grounding wire, yarn static electricity can be rapidly eliminated, the situation that impurities are adsorbed by the static electricity, yarn winding is caused is avoided, and the yarn quality is guaranteed; the guide mechanism drives the threaded rod through the first motor, so that the driving block stably slides along the guide rod; in the tension degree self-adaptive mechanism, a spring, a sliding block and a tension adjusting rod sense and adjust the tension of the yarn in real time, so that the tension degree self-adaptive mechanism adapts to the characteristics of the chenille yarn, the problem of breakage or looseness caused by abnormal tension is solved, and finally the yarn spooling quality and the production efficiency are improved.
Owner:ANHUI XINGE NEW MATERIALS TEXTILE CO LTD
Polyamide foam material as well as preparation method and application thereof
The invention discloses a polyamide foam material as well as a preparation method and application thereof. The polyamide foam material comprises the following raw material components in parts by weight: 85-98 parts of polyamide 5X resin and 0.5-5 parts of a chain extender, the pore size distribution of the foam material is 1.0 to 3.0. According to the invention, polyamide 5X resin is used as a raw material, a polyamide modified material meeting foaming requirements is prepared through chain extension modification, and then the bio-based polyamide foam material is prepared through continuous extrusion, foaming and molding by twin-screw extrusion foaming equipment. Or the polyamide 5X resin is subjected to online chain extension modification and continuous extrusion foaming molding in double-screw extrusion foaming equipment to prepare the bio-based polyamide foam material, and the bio-based polyamide foam material has the characteristics of low foam density, high foaming ratio, high compression strength, uniform average cell diameter and small pore size distribution.
Owner:CATHAY BIOTECH INC +1
Balloon catheter assembly for combined local anesthesia and balloon dilatation
ActiveCN222533912UUniform diameterUniform materialBalloon catheterAnaesthesiaBalloon dilatation catheterBalloon dilations
The utility model relates to a balloon catheter assembly for jointly carrying out local anesthesia and balloon dilatation, which comprises a balloon catheter and a guide wire, the balloon catheter comprises a handle, a balloon dilatation catheter, a balloon dilatation catheter and a balloon dilatation catheter, the handle is provided with a cavity, a discharge port, a main channel and a secondary channel, and the discharge port, the main channel and the secondary channel are communicated with the cavity; the balloon is arranged at one end, far away from the handle, of the balloon catheter; one end of the inner core catheter is communicated with the main channel in the cavity of the handle, the other end of the inner core catheter extends from the cavity of the handle, penetrates through the discharge port and reaches an inner core catheter outlet of the inner core catheter, and the inner core catheter outlet is communicated with the interior of the balloon; and an outer core catheter disposed outside of the inner core catheter and having one end in communication with the secondary passage in the cavity of the handle and the other end extending from the cavity of the handle through the discharge port to an outer core catheter outlet of the outer core catheter, the outer core catheter outlet communicating with the outside of the balloon catheter, and wherein the outer core catheter is disposed outside of the balloon catheter. The diameter of the guide wire is smaller than the inner diameter of the inner core catheter of the balloon catheter, so that the guide wire can be introduced into the inner core catheter.
Owner:XUANWU HOSPITAL OF CAPITAL UNIV OF MEDICAL SCI
Cage type wire stranding device and composite cable manufacturing method
PendingCN119650199AUniform diameterquality improvementLinear/angular speed measurementCable/conductor manufactureStructural engineeringMechanical engineering
The invention provides a cage type wire stranding device and a composite cable manufacturing method, and the device comprises a cage stranding mechanism which is used for stranding a plurality of single wires, a cage stranding driving mechanism, a traction mechanism which is used for pulling a cable, a traction driving mechanism, a rotation speed sensor which is used for detecting the rotation speed of a cage body, and a cage stranding control mechanism. Wherein the cage stranding control mechanism controls the traction driving mechanism according to the cage body rotating speed measured by the rotating speed sensor, so that the traction speed of the traction mechanism is matched with the cage body rotating speed, the traction speed of the cable can be automatically adjusted according to the cage body rotating speed, and in the whole cable stranding process, the traction speed of the cable can be automatically adjusted. The speed of twisting and cabling of the plurality of cables and the advancing speed of the cables are always kept in a predetermined adaptive relationship, so that the formed composite cable has uniform diameter and cabling pitch, and the quality of the composite cable is improved.
Owner:FEIDA TECH CO LTD
Anti-tumor degradable ureteral stent with bionic structure and preparation method of anti-tumor degradable ureteral stent
PendingCN121944255AWide range of degradation controllabilityMeet the needs of different clinical treatment cyclesStentsSurgeryDrug release ratePolyester
The invention belongs to the technical field of medical stents, and particularly relates to an anti-tumor degradable ureteral stent with a bionic structure and a preparation method of the anti-tumor degradable ureteral stent. The anti-tumor degradable ureteral stent with the bionic structure comprises a single-layer tubular stent body or a multi-layer tubular stent body, the single-layer tubular stent body is made of aliphatic polyester polymers and drugs, the multi-layer tubular stent body comprises an inner tube and an outer tube which are coaxial, the inner tube is made of polyvinyl alcohol and drugs, and the outer tube is made of polyethylene glycol. And the outer pipe is made of an aliphatic polyester polymer. The anti-tumor degradable ureteral stent with the bionic structure provided by the invention has flexibility required for adapting to dynamic peristalsis of the ureter, is not easy to cause mechanical damage to urinary tract tissues, has dual functions of anti-tumor activity and surface wettability, can realize synchronous matching of a drug release rate and a material degradation rate, and has a good application prospect. Meanwhile, the mechanical anti-fatigue performance of the stent is not sacrificed.
Owner:TAIYUAN UNIVERSITY OF TECHNOLOGY
Roll forming equipment for middle section of copper pipe
The invention discloses copper pipe middle section rolling forming equipment, relates to the field of copper pipe rolling, and aims to solve the problems that in the prior art, the manual processing efficiency is low, and the product quality is inconvenient to control, the adopted technical scheme is that the copper pipe middle section rolling forming equipment comprises a support, a mounting position is arranged on the support, and a rocker arm is hinged to the support; a connecting rod and a crank arm are arranged on the two sides of the hinged position of the support and the rocker arm respectively, a linear power device is hinged between the connecting rod and the support, the end of the crank arm is in shaft connection with a pressing roller, and a limiting adjusting mechanism is further installed on the crank arm. The action of the rocker arm is controlled through the linear power device, downward pressing and upward lifting of the pressing roller can be controlled, and therefore the large pipe diameter at the tool retracting position of the jump gear section is automatically reduced, the uniformity of the pipe diameter of the copper pipe is guaranteed, time and labor are saved, the machining efficiency is high, and the product quality is convenient to control. The limiting adjusting mechanism can prevent the copper pipe from sinking due to excessive pressing, and the product quality is guaranteed.
Owner:XINXIANG LONGXIANG PRECISE COPPER PIPE CO LTD
Annular non-contact quartz fiber production heating and melting device
ActiveCN224186045Uhigh purityavoid pollutionGlass furnace apparatusElectric furnaceThermodynamicsMechanical engineering
The utility model relates to the field of quartz fiber production, and discloses an annular non-contact quartz fiber production heating and melting device which comprises an outer cavity, an outer cavity cover is fixedly connected to the top of the outer cavity, a plurality of guide rod holes are formed in the surface of the outer cavity cover, an inner cavity is fixedly connected to the interior of the outer cavity, and a plurality of guide rod holes are formed in the surface of the inner cavity. An inner cavity cover is fixedly connected to the top of the inner cavity, a heating assembly is arranged in the inner cavity and comprises a heating ring, the heating ring is installed in the inner cavity, a plurality of heat insulation pipes are fixedly connected to the bottom of the heating ring, a plurality of heating holes are formed in the top of the heating ring, and the heat insulation pipes are fixedly connected to the bottom of the heating ring. The outer wall of the heating ring is sleeved with an induction heating coil. According to the utility model, non-contact induction heating is adopted, and inert gas is filled into the inner cavity to protect molten quartz glass rod liquid drops, so that impurities in the air can be prevented from polluting the quartz liquid drops, and the purity of silicon dioxide in the quartz fiber is further improved.
Owner:HEBEI HEFENG TECH DEV CO LTD
A bio-based nanofiber membrane, a preparation method thereof and application thereof in ethylene adsorption and fruit preservation
ActiveCN118087147BRich in sources, safe and non-toxicImprove adsorption capacityFruit and vegetables preservationConjugated cellulose/protein artificial filamentsPullulanClimacteric
The application discloses a kind of bio-based nanofiber membrane and its preparation method and application in ethylene adsorption and fruit preservation;The application is by dispersing oxidized starch and pullulan in water, and is configured into the mixed solution of oxidized starch / pullulan with solute mass fraction of 15~30%, and starch-polyose compound paste solution is obtained by gelatinization;Add water-soluble protein, heat and stir to obtain electrospinning liquid;The electrospinning liquid is electrospun to obtain bio-based nanofiber membrane.The bio-based nanofiber membrane prepared by the application can adsorb ethylene gas in the environment under normal temperature and pressure as a green material, and has low cost, simple process and can be reused.The nanofiber membrane system prepared by selecting oxidized starch-pullulan-water-soluble protein can adsorb 3.19-15.40cm 3 / g ethylene gas under normal temperature and pressure, prolongs the shelf life of food, and comprehensively realizes the preservation of banana and other respiratory-peak fruits.
Owner:SOUTH CHINA UNIV OF TECH
Molten salt electrolysis method for preparing iron-encapsulated carbon nanotubes by using blast furnace dust and application of molten salt electrolysis method
PendingCN119265576AUniform diameterUniform iron massElectrolysis componentsCarbon nanotubesElectrolysisFlue gas
The invention discloses a fused salt electrolysis method for preparing an iron-encapsulated carbon nanotube by using blast furnace dust and application of the fused salt electrolysis method. The electrolysis method comprises the following steps: adding an iron source into fused salt, after the iron source is completely molten, continuously electrolyzing under the condition that CO2 is introduced to simulate a blast furnace flue gas atmosphere, and after the electrolysis is finished, collecting to obtain the iron-encapsulated carbon nanotube; wherein the iron source is obtained by collecting and treating blast furnace dust. According to the method, the blast furnace flue gas is comprehensively utilized, the collected iron source is added into a molten salt system, electrolysis is carried out under the condition that CO2 is introduced to simulate the blast furnace flue gas atmosphere, and the iron-encapsulated carbon nano tube which is uniform in tube diameter, long in radial length, uniform in iron elementary substance, high in graphitization degree and excellent in microwave absorption performance is prepared through a molten salt electrolysis method.
Owner:WUHAN UNIV
Method for marking fiber micro-plastic by using up-conversion nanoparticles and application
PendingCN119505463Areduce distractionsRealize visual observationMaterial analysis by electric/magnetic meansMonocomponent synthetic polymer artificial filamentSpinningMass analyzer
The invention relates to marking of micro-plastics, in particular to a method for marking fiber micro-plastics by using up-conversion nanoparticles (UCNPs) and application. The method specifically comprises the following steps: dispersing rare earth doped UCNPs and polyacrylonitrile (PAN) powder in a dispersion liquid to obtain a spinning solution, and marking the fiber micro-plastic with the up-conversion nanoparticles through an electrostatic spinning-high-speed roller system. The prepared labeled fiber micro-plastic has excellent up-conversion luminescence performance, interference of autofluorescence of biological tissue can be effectively reduced, and detection of distribution of the labeled fiber micro-plastic in a living body is achieved in combination with a time-gated imaging technology; the rare earth elements in the up-conversion nanoparticles can be used as element tags, and high-sensitivity quantitative analysis is carried out by using a plasma mass spectrometer; the up-conversion nano-particles are firmly embedded in the fiber micro-plastic through an electrostatic spinning technology, the stability of the marker is ensured, and the diameter of the fiber micro-plastic can be accurately regulated and controlled by adjusting the concentration of a spinning solution and the spinning voltage.
Owner:QINGDAO UNIV
Dropping pill machine capable of uniformly forming dropping pills and control method of dropping pill machine
PendingCN119280062Afall fastavoid contactPharmaceutical product form changeDomestic articlesThermodynamicsControl system
The invention relates to a pill dropping machine capable of uniformly forming dropping pills and a control method thereof, and the pill dropping machine comprises a material storage tank for storing pill dropping agents; the drip irrigation system is connected to the storage tank, the drip irrigation system comprises a water dropper and a rotating motor, and the rotating motor drives the water dropper to rotate; the cooling tank is arranged below the water dropper, an air inlet hole and an air outlet hole are formed in the upper part of the cooling tank, a circle of air inlet ring is arranged at the position, corresponding to the air inlet hole, of the inner wall of the cooling tank, the air inlet ring is communicated and connected with the air inlet hole, a plurality of air spraying holes are formed in the bottom of the air inlet ring, and the air spraying holes are communicated with the air outlet hole. The air injection direction of the air injection hole faces the lower part of the cooling tank, and the air inlet hole is connected to a corresponding air pump; and the control system is used for controlling the rotating speed of the rotating motor when the pill dropping agent is output from the spray hole, so that the pill dropping agent is separated from the spray hole under the action of centrifugal force, and is also used for controlling the flow speed of the air pump and pushing the pill dropping agent separated from the spray hole downwards.
Owner:XIAMEN UNIV OF TECH
Iron-based oxide catalyst as well as preparation method and application thereof
ActiveCN119406408Aimprove bindingavoid coarseningMaterial nanotechnologyCarbon nanotubesPtru catalystPhysical chemistry
The invention discloses an iron-based oxide catalyst as well as a preparation method and application thereof. The iron-based oxide catalyst comprises a main catalyst body and a cocatalyst distributed on the main catalyst body, the main catalyst body comprises iron powder, and the cocatalyst comprises iron oxide. The preparation method comprises the following steps: in the presence of water vapor and oxygen, iron powder is subjected to an oxidation reaction in a reaction chamber, iron oxide is generated on the surface of the iron powder in situ, and the iron-based oxide catalyst is prepared. The iron-based oxide catalyst provided by the invention is good in stability and controllable in particle size, and the cocatalyst component and the main catalyst body have strong interaction, so that agglomeration and falling of the cocatalyst can be effectively prevented; when the catalyst is applied to catalytic preparation of carbon nanotubes, the yield is high, and the tube diameter is uniform.
Owner:JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
A welding workbench for automotive turbochargers based on standardized processing
ActiveCN121892827BPrecise dockingavoid runoutWelding/cutting auxillary devicesAuxillary welding devicesImpellerTurbine wheel
This invention discloses a welding workbench for automotive turbochargers based on standardized processing, belonging to the field of turbocharger welding technology. It includes a base, on which a rotary chuck is slidably mounted. A pneumatic chuck is mounted on the side of the base away from the rotary chuck via a bracket. A first electro-hydraulic rod, connected at one end to the rotary chuck, is mounted on the side of the base away from the pneumatic chuck. Through the design of the base, chuck, auxiliary unit, and positioning unit, the invention precisely solves the technical pain points of traditional workbench use, such as cumbersome processing of extruded plastic metal and unstable clamping. The corresponding arrangement of the rotary chuck and pneumatic chuck achieves precise docking of the turbine shaft and turbine impeller. In conjunction with the second electro-hydraulic rod of the positioning unit, the upper pressure seat, the lower clamping seat, and the transmission engagement of the gear and rack, the turbine impeller, fixed by the pneumatic chuck, can be clamped in a wrap-around manner, effectively preventing radial runout of the impeller during high-speed rotational friction.
Owner:FENGCHENG PACIFIC SHENLONG TURBOCHARGER CO LTD
A single crystal optical fiber and a method of making and using the same
The application relates to the technical field of new materials and temperature sensing, in particular to an XAlO3 (X=Gd, Tb) single crystal optical fiber and a preparation method and application thereof. The raw material rod is prepared through a component modulation process, so that the component of GdAlO3-TbAlO3 is suddenly changed in the axial direction, and the single crystal optical fiber with uniform diameter, consistent orientation and the lattice ion mutation at a specific position in the axial direction is obtained through a stable crystal growth process; the mutation of the lattice ion leads to the mutation of the crystal density and the intrinsic sound velocity, and then the acoustic impedance is mismatched at the position and the acoustic wave reflection signal is generated, so that the ultrasonic wave guide temperature measurement is realized.
Owner:SHANDONG UNIV +1
Thorium polymer spun fiber precursor, thorium oxide nanofiber and preparation method and application
This invention discloses a thorium polymer spinning precursor, thorium oxide nanofibers, their preparation methods, and applications, belonging to the field of nuclear materials technology. The invention uses thorium chloride as the thorium source, acetylacetone as the ligand, and triethylamine as the dechlorination agent to prepare a thorium polymer spinning precursor. A spinning solution is prepared using the thorium polymer as the spinning precursor, methanol as the solvent, and polyethylene oxide (PEO) as the spinning aid. The thorium polymer spinning precursor fibers are obtained by electrospinning, and the precursor fibers are then heat-treated to obtain thorium oxide nanofibers. The thorium polymer spinning precursor prepared by this invention has a high thorium content and stable properties. Its spinning solution exhibits good filamentation properties, and the prepared thorium oxide fibers have uniform diameter, dense structure, and excellent flexibility. This thorium oxide nanofiber material can be used as a neutron shielding material, a breeder fuel for nuclear technology, and also as a high-temperature resistant material for preparing special ceramics.
Owner:NUCLEAR POWER INSTITUTE OF CHINA