40results about How to "Uniform adsorption" patented technology

A feeding structure for folding umbrella fabric includes a base and a suction cup. The suction cup includes a rotating end and an adsorption end. The rotating end is connected to a servo motor. Several adsorption ports are formed on the lower annular surface of the adsorption end. These ports are connected to an external vacuum extraction device through connecting holes inside the suction cup. The base is equipped with a feeding rod and a folding umbrella fabric mechanism. The feeding rod is vertically adjustable on the base. The folding umbrella fabric mechanism includes an embossing surface. The lower annular surface of the adsorption end is higher than the embossing surface. A negative pressure sensor connected to the connecting holes is provided on the base. The servo motor controls the rotation of the suction cup. When the suction cup rotates above the feeding rod, the feeding rod lifts the umbrella fabric to below the adsorption end. The suction cup then adsorbs the umbrella fabric through the adsorption ports. The servo motor rotates the suction cup, causing the adsorption end to rotate onto the embossing surface of the folding umbrella fabric mechanism. This invention provides uniform adsorption of the umbrella fabric, ensuring that the umbrella fabric does not pull up lower layers of umbrella fabric during the adsorption process.

The utility model discloses a marble cutting gantry machine tool relates to marble cutting technical field, including machine table and cutting mechanism, its characterized in that: the machine table is provided with the gantry mechanism that is linked with cutting mechanism, the gantry mechanism drives cutting mechanism to move laterally, longitudinally and vertically, the inboard fixed connection of machine table has the support plate of linear array distribution, the fixed connection of machine table has the adsorption mechanism and adjusting mechanism below the support plate, the adsorption mechanism includes adsorption tray and air pump, the air pump fixed mounting is on the machine table, and the adsorption tray is clamped among a plurality of support plates. The utility model discloses through the air pump suction in adsorption hole forms the negative pressure, and the sponge layer is pressed after closely fitting marble bottom surface, fills up the uneven surface and increases the friction, and a plurality of adsorption boxes disperse adsorption force, and even fixed marble, avoids the stress concentration in local, carries out adsorption to marble to prevent marble from sliding.

The application provides a kind of bio-based high-strength, heat-resistant and easy-to-dye polylactic acid composite fiber and its preparation method, which adds rigid furan polyester and flexible furan polyester blend in polylactic acid matrix, and introduces compatibilizer, realizes in-situ reaction between multi-functionality epoxy groups on the molecular chain of compatibilizer and the end groups of PLA and furan polyester, improves the interfacial compatibility between furan polyester dispersed phase and PLA continuous phase, improves the interfacial adhesion, and finally induces the formation of stable core-shell structure fiber. The PLA composite fiber prepared by the preparation method of the application has excellent mechanical strength and heat resistance. In addition, the preparation method of the application has simple process route, and the addition amount of compatibilizer is very low. It efficiently realizes structure remodeling, and at the same time, it has the original strength of polylactic acid fiber, and has wide application prospect in the fields of medical textiles, orthopedic fixation braided belt and industrial high-performance fiber.

This utility model discloses a boxing bag technology, specifically a hanging inflatable boxing bag, including an inner air bladder forming a closed first air chamber with an inflation valve at the top. An outer bag body is fitted over the inner air bladder, forming a second closed chamber between the inner air bladder and the outer bag body. The top of the outer bag body has a hanging interface. A counterweight absorbent layer fills the second closed chamber. The cushioning structure includes multiple sets of longitudinal reinforcing ribs on the outside of the outer bag body and annular shock-absorbing bands connected to the longitudinal reinforcing ribs. Through the double-layer structure, the inner air-filled layer and the outer counterweight absorbent layer allow water to be absorbed evenly, preventing swaying during punches. The counterweight absorbent layer can simulate muscle rebound, enhancing the training experience. At the same time, the boxing bag is small in size when not filled with water or inflated, making it easy to carry.

The invention discloses a residual oil hydrotreating catalyst and a preparation method thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: S1, mixing dolomite, cerous carbonate, a zirconium oxide precursor and a silicon dioxide precursor, drying and calcining to obtain a composite carrier, and performing in-situ pore forming by utilizing gas generated by decomposition of the dolomite and the cerous carbonate to form a mesoporous structure; s2, dipping the composite carrier in a modification liquid containing chitosan and mannuronic acid, and constructing a cross-linked network coating on the surface of the composite carrier through a Schiff base reaction to obtain a modified carrier; s3, dipping the modified carrier in a precursor solution containing a nickel source, a molybdenum source and a sulfur source, and performing adsorption, drying and roasting to obtain the catalyst. Through the synergistic effect of pore structure regulation and surface modification, the carrier with high porosity and suitable pore distribution is obtained, and meanwhile, high dispersion and stable loading of active metal components are realized. The catalyst shows excellent hydrodesulfurization, denitrification and demetallization performance in residual oil hydrotreatment.

The invention belongs to the technical field of polishing machines, and particularly discloses a curved optical glass polishing machine which comprises a cabinet, a splash-proof bin is arranged above the cabinet, a profiling suction and abutting mechanism is arranged in the splash-proof bin, and a PLC is fixedly installed on the outer wall of one side of the cabinet. The rear end of the cabinet is connected with a polishing mechanism through an arranged storage lifting mechanism, a suction mechanism is arranged on one side of the interior of the splash-proof bin in a communicating mode, the profiling suction abutting mechanism further comprises a profiling disc table, the outer edge of the profiling disc table is bent downwards, and a wear-resisting flexible particle pad is machined on the outer surface of the profiling disc table. According to the curved glass polishing device, dynamic balance fixing can be achieved, the problems of displacement, scratches and damage caused by unstable fixing in the curved glass polishing process are solved, and high-precision, self-adaptive and full-automatic polishing is achieved.

The utility model discloses a kind of high-frequency ion mist fresh-keeping treatment devices of picked apricot, including medicine supply mechanism, stirring mechanism, circulation mechanism, ion mist processing mechanism, transmission mechanism, liquid receiving mechanism and air drying mechanism, the liquid outlet of medicine supply mechanism and circulation mechanism is connected with the liquid inlet of stirring mechanism respectively, the liquid outlet of stirring mechanism is connected with the liquid inlet end of ion mist processing mechanism, ion mist processing mechanism and air drying mechanism are sequentially arranged in the outside of transmission mechanism along the conveying direction of transmission mechanism, and the discharge port of ion mist processing mechanism is connected with air drying mechanism by isolation curtain, the bottom of transmission mechanism is equipped with liquid receiving mechanism, and the liquid inlet of liquid receiving mechanism is connected with circulation mechanism. The utility model utilizes high-frequency ion mist generator to evenly cover preservative on apricot surface, and then recycles excessive preservative through air drying system, to realize efficient fresh-keeping effect.

The laser positioning cutting device for the automobile lamp lens comprises a base, and two transverse sliding rails are oppositely and fixedly connected to the two sides of the base; a longitudinal guide rail is connected between the two transverse slide rails in a sliding manner; the top of the longitudinal guide rail is slidably connected with a laser cutting machine, and the longitudinal guide rail and the laser cutting machine are both driven by a linear module. A negative-pressure channel is formed in the base, and one end of the negative-pressure channel extends out of the base; limiting mechanisms are inserted into the positioning insertion holes, each limiting mechanism comprises a bottom block, the positioning insertion holes are formed in the base at equal intervals, and after the limiting mechanisms are inserted, horizontal displacement of the lens is limited through physical constraint of the positioning insertion holes; meanwhile, the vacuum suction cup is matched with the sealing ring, uniform adsorption force is formed on the bottom of the lens, shaking caused by vibration and uneven weight during cutting is prevented through double effects, and it is ensured that the cutting track is consistent with the design contour of the lens; the limiting mechanism is installed in an insertion mode, and when lenses of different specifications are replaced, insertion hole combinations can be rapidly adjusted and positioned, and universality and efficiency are both considered.

The LED lamp bead surface mounting equipment comprises a base, in the using process, an electric push rod drives a positioning block to rapidly pre-position a substrate, a first motor drives a two-way screw to rotate, two sliding blocks drive a clamping plate to synchronously and reversely move, accurate clamping of the substrate is achieved, and the surface mounting efficiency of the LED lamp bead surface mounting equipment is improved. The friction force can be increased through the anti-skid rubber pads on the clamping plates, the base plate is prevented from sliding in the clamping process, and the positioning precision is greatly improved; the air cylinder can drive the transverse moving assembly, the rotating assembly and the chip mounting head to integrally ascend and descend, and the chip mounting height requirement is met; the transverse moving assembly drives a transverse lead screw to rotate through a second motor, and a limiting rod is matched for guiding, so that a moving seat drives a chip mounting head to stably and horizontally move, and the chip mounting transverse position is accurately adjusted; worm and worm wheel transmission is adopted in the rotating assembly, a third motor drives a worm to drive a worm wheel and a rotating shaft to rotate, then the angle of the chip mounting head is adjusted, and the chip mounting requirements of LED lamp beads in different arrangement modes are met.

The application discloses a kind of visual detection device and detection method of TR fabric high color fastness padding product, it is related to visual detection technical field, including visual detection device, and visual detection device includes unwinding unit, dark box and winding unit, the inside of the dark box is provided with positioning mechanism for the fabric of detection position is positioned, positioning mechanism includes: negative pressure unit, is set to the inside of dark box, by setting positioning mechanism, effectively solve the soft TR fabric in open detection area due to tension fluctuation and residual deformation and lead to the problem of bulging, warping.Negative pressure unit in the suction pump operation, negative pressure is generated in the inside of negative pressure box, and uniform adsorption force is generated to the air-permeable fabric body through the round hole on its top.Meanwhile, negative pressure box is equipped with several partition plates and is divided into multiple independent negative pressure chambers, and the size of negative pressure is adjusted by the electromagnetic valve installed on branch pipe, so that fine control of fabric tension is realized.

The utility model relates to the technical field of automatic auxiliary material sticking equipment, and discloses a gummed paper auxiliary material suction head and a film sticking machine thereof. A through hole penetrates through the top of the seat body; a connecting rod communicated with the through hole is arranged at the top of the seat body; a suction plate corresponding to the base body is arranged at the bottom of the base body; a plurality of suction holes communicated with the through hole are formed in the top of the suction plate in a penetrating manner; the connecting rod is communicated with the through hole, so that airflow or vacuum can be smoothly transferred into the suction head. The suction plate corresponding to the base body is arranged at the bottom of the base body, a plurality of suction holes are also formed in the top of the suction plate, and the suction holes and the through holes in the base body form a communication path, so that the function of adsorbing the adhesive paper auxiliary materials is realized. The adsorption force is uniformly distributed, the adsorption efficiency is improved, the processing, manufacturing and maintenance are convenient, and the adsorption device is suitable for automatic or semi-automatic production equipment, and has important significance on improving the precision and efficiency of auxiliary material laminating or carrying.

The application discloses a kind of basic sulphate load Pt composite material and its preparation method and application in seawater electrocatalytic hydrogen evolution, belong to the preparation technical field of electrocatalytic material.The application is to solve the technical problems of low catalytic activity of existing catalyst, and high cost of noble metal.Method includes:1) preparation basic nickel sulfate carrier;2) preparation Pt source solution;3) soaking;4) electrochemical treatment obtains basic sulphate load Pt composite material.The basic sulphate load Pt composite electrode material prepared by the application shows superior catalytic performance in alkaline conditions and seawater electrocatalytic hydrogen evolution, has excellent electrochemical performance and stability, and will have wide application prospect in the field of electrocatalytic water decomposition electrode material technology.The basic sulphate load Pt composite material electrolytic water catalyst prepared by the method of the application is used in the field of electrocatalytic material technology, and improves hydrogen energy preparation and seawater utilization problem.

The utility model discloses an adsorption table tray for advanced board-level packaging large board warping, which belongs to the technical field of chip packaging, the integral structure of the adsorption table tray is composed of a tray body and a base, a vacuum area is partitioned by partition strips on the bottom surface of the tray body, an air inlet of the base is connected with a vacuum pump, five paths of vacuum do not interfere with each other and are opened simultaneously, and the vacuum degree is high. The suction force of each subarea can be controlled through the design of the vacuum subareas, then the suction force of each part of the substrate is controlled so as to deal with various warping conditions, the plane contact design is further adopted, each substrate is directly attached to the top face of the disc body, the attaching area is increased, and the attaching effect is improved. And suction nozzles are arranged at the four corners and the center position of each adsorption unit, uniform adsorption is achieved, the situation of uneven adsorption is avoided, a deflation groove is omitted, and the situation that vacuum is released from the deflation groove when stress is released in the product cutting process is reduced.

The present disclosure provides a warped wafer transfer method and device, the method comprising: taking out a warped wafer from a first slot of a magazine by a Bernoulli arm and transferring it to a SUBCHUCK device; transferring the warped wafer, which has performed a pre-alignment operation, to a pre-calibrated loaded wafer position W2 by the Bernoulli arm, vertically moving a worktable to a pre-calibrated wafer handover height H1, opening a worktable vacuum, closing a Bernoulli arm blowing, and making the warped wafer fall onto the worktable; horizontally moving the worktable to a pre-calibrated auxiliary blowing position W3, opening an auxiliary blowing system located above the warped wafer, and making the warped wafer uniformly adsorbed onto the worktable. The transfer method and device provided by the present disclosure can improve the transfer efficiency of the warped wafer.

This invention discloses a cubic Ru / Co3O4 catalyst, its preparation method, and its applications, belonging to the field of electrode material technology. The method includes the following steps: S1, dissolving cobalt nitrate hexahydrate and hexadecyltrimethylammonium bromide in water, dissolving 2-methylimidazole in water, mixing and stirring to obtain a Co-MOF; S2, calcining the Co-MOF to obtain a Co3O4 cube; S3, dissolving the Co3O4 cube and ruthenium trichloride in water, and performing a hydrothermal reaction to obtain the cubic Ru / Co3O4 catalyst. This invention employs a preparation sequence of "calcination followed by hydrothermal loading," ensuring that Ru species are mainly distributed on the surface of the Co3O4 cube, avoiding Ru species embedding and agglomeration caused by high-temperature calcination. The resulting catalyst has a regular cubic morphology, uniform Ru dispersion, and high catalytic activity, showing broad application prospects in electrocatalytic oxygen evolution and hydrogen evolution.

The application relates to the technical field of building materials, and discloses a mortar containing nanomaterials and a preparation method thereof, the mortar being composed of 70-80 parts by weight of cement, 8-12 parts by weight of fly ash, 0.4-0.5 parts by weight of a polycarboxylate water reducing agent, 0.4-0.6 parts by weight of hydroxypropyl methylcellulose, 1-2 parts by weight of nanomaterials, 2-3 parts by weight of modified silk fibroin and 40-50 parts by weight of water. The modified nanosilica is modified by gamma-aminopropyl triethoxysilane, the modified cubic nanometer calcium carbonate is modified by fumaric acid, sodium stearate and palmitic acid, and the modified silk fibroin is prepared by being grafted and modified by a double-aminopropyl-terminated polysiloxane. The mortar is treated by optimizing component collocation, modifying the nanomaterials and the silk fibroin, the mechanical properties, the durability and the crack resistance of the mortar are remarkably improved, and the cost is controllable.

The application discloses a fine-grain high-strength aluminum matrix composite material and a preparation method thereof, and belongs to the technical field of metal matrix composite material preparation. The uniform dispersion of graphene is realized through a wet planetary ball milling technology, and the synergistic effect of fine-grain strengthening and graphene enhancement is realized by combining cold pressing forming and hot rolling densification. The application realizes the uniform dispersion of graphene in the aluminum matrix and the intact structure of graphene by the synergistic effect of the wet planetary ball milling and the cold pressing-hot rolling integrated process, and effectively inhibits the generation of brittle interface reaction products. The proper amount of graphene is used as a recrystallization heterogeneous nucleation core and a grain boundary pinning agent, the aluminum matrix grains are significantly refined, the strength of the material is improved, the plasticity is maintained or even improved, and the bottleneck of the strength-plasticity inversion of traditional aluminum matrix composite materials is completely broken.

The application discloses a preparation method and application of a low-particle-size platinum-carbon catalyst. The preparation method comprises the following steps: drying a carbon carrier under vacuum conditions, adding the dried carbon carrier into a mixed solvent of ethylene glycol and water, and performing ultrasonic dispersion to obtain a uniform carbon carrier slurry; dissolving a platinum precursor in ethylene glycol, performing ultrasonic dispersion to obtain a platinum precursor solution; adding the platinum precursor solution into the carbon carrier slurry drop by drop, and performing ultrasonic dispersion after dropwise addition is completed; subsequently, adding a sodium hydroxide solution drop by drop, and performing ultrasonic dispersion to obtain a precursor mixed slurry; heating the precursor mixed slurry, and performing heat preservation reaction under magnetic stirring reflux for 1h-3h, and naturally cooling to room temperature to obtain a catalyst mixed liquid; performing solid-liquid separation on the catalyst mixed liquid, washing the solid product, and performing vacuum drying and grinding to obtain the low-particle-size platinum-carbon catalyst. The platinum-carbon catalyst has controllable particle size and can be highly dispersed.

The utility model relates to the technical field of traffic signboards, and discloses a road traffic signal sign convenient to fix, which comprises a support vertical rod and a fixing component, the top of the support vertical rod is sequentially provided with a mounting rod I and a mounting rod II from top to bottom, the right ends of the mounting rod I and the mounting rod II are fixedly connected with fixing sleeves, and the fixing sleeves are fixedly connected with the fixing components. A limiting square groove is formed in the top of the first mounting rod, a signboard is inserted in the limiting square groove in a matched mode, a clamping groove is formed in the top of the second mounting rod, a signboard is embedded in the clamping groove in a matched mode, and a fixing assembly is movably connected to the left end of the second mounting rod. The signboard is limited and fixed in the first mounting rod through the fixing assembly. The signboard is installed on the supporting vertical rod through the limiting square groove, the bottom of the signboard is clamped in the clamping groove, and the fixing pad makes close contact with the top face, so that stable fixing is achieved, the installation and replacement process is simplified, the working efficiency is improved, and the stability and reliability of the signboard are guaranteed.

The utility model discloses a chipping adsorption device for glass cutting, which comprises an adjusting frame, a negative pressure pipe is longitudinally connected between two longitudinal plates of the adjusting frame in a sliding manner, a glass chipping adsorption pipe is arranged at an air inlet of the outer cambered surface of the negative pressure pipe, and the chipping adsorption device further comprises an adsorption mechanism; the adsorption mechanism comprises a high-pressure pipe, an air outlet pipe and a flow guide pipe, the high-pressure pipe is longitudinally connected between the two longitudinal plates of the adjusting frame in a sliding mode, the air outlet pipe is arranged at an air blowing opening in the outer arc face of the high-pressure pipe, and the air outlet pipe inclines downwards from back to front. Glass fragments on the surface of the glass cutting table are blown up through air flow blown out obliquely, adsorption of the glass fragments on the surface of the cutting table is reduced, the glass fragments are adsorbed more thoroughly, air pressure in the negative pressure pipe is guided to be distributed more evenly in the transverse direction, the glass fragments are adsorbed more evenly in the transverse direction, and through cooperation with longitudinal movement of the adsorption component, the glass fragments are more thoroughly adsorbed. And chippings on the surface of the glass cutting table are comprehensively adsorbed.

The application relates to a continuous supercritical fluid spinning system for continuously preparing micro-nano fiber non-woven fabric, which comprises a supercritical fluid spinning liquid preparation device, a micro-nano fiber supercritical spinning device, a secondary drawing and bundle collecting device of micro-nano fiber, the supercritical fluid spinning liquid preparation device is connected with the micro-nano fiber supercritical spinning device, the micro-nano fiber supercritical spinning device is arranged above the secondary drawing and bundle collecting device of micro-nano fiber, the supercritical fluid spinning liquid preparation device is used for continuously preparing uniform and stable supercritical fluid spinning liquid, the micro-nano fiber supercritical spinning device is used for preparing uniform and continuous micro-nano fiber, and the secondary drawing and bundle collecting device of micro-nano fiber is used for secondary drawing and bundle collecting of micro-nano fiber. Compared with the prior art, the continuous supercritical fluid spinning system can continuously prepare non-woven fabric with high strength, good barrier property and excellent air permeability.

The invention relates to the technical field of paint mist filtering devices, and discloses an assembled filtering device for paint mist adsorption, comprising: a support frame composed of a plurality of long rods and used for supporting a filter element in the filtering device; the paper shell is a strip-shaped paper board, the head part and the tail part of the paper shell are connected together by arranging an extension plate so as to wrap the outer side of the supporting frame, and the paper shell is connected and opened through the extension plate when the filtering device is mounted and dismounted; the filter assembly comprises a plurality of filter elements, the filter elements are slidably mounted at different positions in the supporting frame, the outer sides of the filter elements are wrapped with filter body protection shells, and the filter body protection shells are used for supporting and fixing the filter elements in the filter body protection shells so that the filter elements in the filter assembly can be independently mounted. According to the assembled filtering device for paint mist adsorption, the purposes of combined installation of all parts and uniform adsorption of paint mist in the device are achieved, any part can be replaced, and the paint mist adsorption rate is increased.

The adsorption bed with the good hydrogen impurity removal effect comprises a reaction treatment assembly, the reaction treatment assembly comprises a treatment barrel, a barrel cover and a bearing ring, the top of the treatment barrel is movably connected with the barrel cover, and the bearing ring is fixedly installed in the middle of the treatment barrel; the uniform and efficient impurity removal assembly comprises a containing cylinder, a sealing cover, an adsorbent layer and a metal net, the containing cylinder is movably placed on the top of the bearing ring, the adsorbent layer and the metal net are movably installed in the containing cylinder, and the top of the containing cylinder is movably connected with the sealing cover; the total number of the adsorbent layers is three, the total number of the metal nets is two, and the metal nets are placed among the adsorbent layers. According to the utility model, the adsorbent layer is filled in the containing cylinder in a segmented manner, so that a small amount of impurities can be adsorbed for multiple times, the contact area between gas and the adsorbent is increased, the concentrated accumulation of the adsorbent can be avoided, and the adsorption process is more uniform and efficient.

The utility model discloses a water jacket for corrugated pipe forming and a machine head, and belongs to the technical field of corrugated pipe forming equipment, the water jacket comprises a water jacket main body, the top and the bottom of the vertical section of the water jacket main body are arc-shaped, the two sides of the vertical section of the water jacket main body are straight walls, and a straight wall part is formed; a vacuum groove spirally surrounding the outer wall of the water jacket body is formed in the outer surface of the water jacket body, at least one negative pressure suction hole is formed in the groove bottom of the vacuum groove, and the negative pressure suction hole is connected with external negative pressure equipment through a negative pressure air channel in the water jacket body. The negative-pressure suction holes are located in the straight wall portion of the water jacket body. The vacuum groove spirally surrounding the outer wall of the water jacket body can better and uniformly adsorb the inner wall of the corrugated pipe.

The application relates to a kind of surface nano fluorinated scandium lithium layer modification and near surface anion and cation co-doped nickel cobalt manganese ternary positive electrode material and its preparation method, belong to chemical energy storage battery technical field.According to the molar ratio of Li, Sc and F element 3:1:6, lithium salt, scandium salt and fluorine salt are weighed respectively, then ultrasonic is added in ethanol aqueous solution and is fully stirred to obtain mixed salt solution;Nickel cobalt manganese ternary positive electrode material is added to the mixed salt solution, heated and stirred until the suspension is dry, and then dried to obtain a powder;The powder is calcined in oxygen atmosphere to obtain a kind of surface nano fluorinated scandium lithium layer modification and near surface anion and cation co-doped modified nickel cobalt manganese ternary positive electrode material.The synergistic effect of Li3ScF6 surface coating and near surface lattice Sc, F co-doping improves the electrochemical performance and thermal stability of nickel cobalt manganese ternary positive electrode material.

This utility model discloses a double-row flexible board paper removal and feeding machine, belonging to the field of feeding machine technology. It includes a mounting frame, a hydraulic lifting component, and a spacing adjustment guide rail. A mounting plate is connected to the spacing adjustment guide rail, and a sliding hole is provided on the mounting plate. A sliding rod is slidably connected to the sliding hole, and one end of the sliding rod is connected to a connecting plate. In this utility model, the adsorption structure composed of suction cups, sliding rods, and air bladders can automatically adjust according to the unevenness of the flexible board surface. When the flexible board surface has different heights, multiple sets of suction cups can contact the flexible board at different heights. The stretching of the air bladder generates negative pressure, achieving a tighter and more uniform adsorption of the flexible board surface. This avoids problems such as weak adsorption and displacement caused by uneven flexible board surfaces, ensuring the stability and safety of the flexible board during the transfer process and improving processing quality.

The invention relates to the technical field of new energy materials, and discloses a high-performance electrochemical catalyst and a preparation process thereof, and the preparation process comprises the following steps: preparing a composite carrier with a carbon nanotube vertically growing on the surface of graphene through a chemical vapor deposition method; introducing nitrogen and sulfur heteroatoms by adopting plasma-assisted vapor deposition; enabling the metal precursor to be uniformly adsorbed on the carrier in a laminar flow state by utilizing a micro-fluidic reactor; and finally, carrying out stepped heating pyrolysis and annealing treatment to obtain a finished product. The obtained catalyst has a three-dimensional conductive network structure containing rich through pore channels, and iron and cobalt metal active centers are anchored to defect sites of a carrier in a coordination form. According to the process, atomic-scale dispersion of active components is achieved through a microfluidic technology, lattice stress is effectively eliminated in cooperation with stepped pyrolysis, the problem that the activity and stability of the catalyst are difficult to consider at the same time is successfully solved, the oxygen reduction catalytic performance is improved, the cycle life is prolonged, and the mass transfer performance under the large-current working condition is excellent.

The utility model provides optical detection equipment, which comprises a base and a detection platform arranged on the base, a detection system and a moving system are arranged on the detection platform, the moving system comprises a moving mechanism and a carrying table arranged on the moving mechanism, and the carrying table is arranged on the base. The moving mechanism drives the carrying platform to move to a detection position of the detection system; the moving system comprises a linear motor and a linear guide rail, adjusting mechanisms are arranged on the two sides of the linear guide rail, each adjusting mechanism is composed of a plurality of adjusting units evenly distributed in the extending direction of the linear guide rail, each adjusting unit is mainly composed of a pushing column and an extrusion screw, the head of each extrusion screw is provided with an inclined face, and the inclined faces are arranged on the pushing columns. When the extrusion screw is screwed into a corresponding mounting hole in the detection platform, the pushing column is extruded by the inclined surface and is pushed towards the side surface of the linear guide rail. According to the utility model, the transfer and detection processes can be conveniently and quickly completed without complicated transfer equipment.

The utility model relates to a modularized rustproof flexible packaging device used in a high-humidity environment, which comprises a flexible packaging main body, a rustproof module and a drying monitoring module, and the flexible packaging main body wraps the rustproof module and the drying monitoring module. The rust resisting module and the drying monitoring module form two cavities through a magnetic attraction separation strip embedded between the rust resisting module and the drying monitoring module, at least one hole is formed in the surface of each cavity, and the rust resisting module and the drying monitoring module are connected and detached through the magnetic attraction separation strip. The drying agent and the corrosion inhibitor in the packaging device can be replaced conveniently, and the metal corrosion speed in the high-humidity environment is reduced.