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Alumina-loaded molecular alkane dehydrogenation catalyst and preparation method and application thereof
PendingCN119425796Alarge diametersmall pressure dropCatalyst carriersOrganic-compounds/hydrides/coordination-complexes catalystsAlkanePtru catalyst
The invention discloses an alumina-loaded molecular alkane dehydrogenation catalyst and a preparation method and application thereof. The preparation method comprises the following steps: (1) carrying out modification treatment on alumina balls; and (2) adding the modified alumina balls into a dissolved solution of a molecular catalyst, stirring, reacting until the supernatant is colorless, filtering, and drying to obtain the alumina-loaded molecular alkane dehydrogenation catalyst. The catalyst provided by the invention is used in a process for preparing olefin through dehydrogenation of straight-chain alkane, the alkane conversion rate can reach 21% or above, the catalyst is high in catalytic efficiency, good in selectivity and easy to recover, and the activity of the recovered catalyst is still high.
Owner:CHINA PETROCHEMICAL CORP +2
Production process and production equipment of plastic adhesive resin
The production technology comprises a stirring tank, a stirring shaft is arranged in the stirring tank, the stirring shaft is driven by a motor assembled on the top of the stirring tank to rotate, a plurality of stirring rods are arranged on the surface of the stirring shaft, a processing box is connected to a discharging opening of the stirring tank, and a processing mechanism is arranged in the processing box; the cooling sieve is used for cooling and sieving fallen materials; a plurality of flow stirring mechanisms are arranged on the inner side wall of the stirring tank, are in sliding connection with the inner wall of the stirring tank, and can horizontally move towards the middle of the stirring tank; a flow guide pipe is arranged on the peripheral surface of the stirring tank in a surrounding manner, connecting pipes are communicated with the parts, corresponding to the flow stirring mechanisms, of the inner end surface of the flow guide pipe, and the other ends of the connecting pipes are connected with the outer wall of the stirring tank. The stirring tank overcomes the defects that materials in a dead angle area of an existing stirring tank cannot be effectively stirred, and consequently mixing is uneven.
Owner:XIAMEN KEAISI PLASTICS TECH
Method for measuring concentration of sulfuric acid in electrolyte stored in lead storage battery polar plate or partition plate
PendingCN119666654Aimprove accuracyImprove efficiencyWeighing by removing componentChemical analysis using titrationElectrolytic agentPhysical chemistry
The invention discloses a method for measuring the concentration of sulfuric acid in electrolyte stored in a lead storage battery polar plate or partition plate, which comprises the following steps: firstly, soaking the polar plate or partition plate in pure water, and extracting residual gas in micropores in the polar plate or partition plate in a vacuumizing manner to promote H2SO4 to be fully mixed with the pure water to obtain a solution 1; and the mass of the electrolyte in the polar plate or the partition plate is obtained by calculating the difference between the mass of the polar plate or the partition plate suspended in the pure water and the mass of the bottom pure water mixed with H2SO4 by using a measuring device. And meanwhile, measuring the mass fraction theta1 of H2SO4 in the solution 1, and calculating the dilution ratio to obtain the mass percentage of H2SO4 in the polar plate or the separator. The negative pressure pumping method is used in the soaking process of the polar plate or the partition plate, multiple times of treatment on the polar plate or the partition plate are reduced, and the measurement accuracy and efficiency are improved.
Owner:TIANNENG BATTERY GROUP
Silver-based tin oxide electric contact material and preparation method thereof
The invention discloses a silver-based tin oxide electric contact material and a preparation method thereof, and relates to the technical field of electric contact materials. When the silver-based tin oxide electric contact material is prepared, firstly, a high-temperature solid-phase method is used for doping lithium and cerium to prepare doped tin oxide powder; stannic chloride and copper nitrate are prepared into a fiber membrane through electrostatic spinning, meanwhile, titanium dioxide is grown in situ through nano spraying, and doped stannic oxide fibers are prepared after calcination; the doped tin oxide powder, doped tin oxide fibers and silver powder are subjected to high-energy ball milling and powder mixing and then annealed, and silver-based tin oxide composite powder is obtained; the silver-based tin oxide composite powder is subjected to pre-pressing forming and then subjected to vacuum discharge plasma sintering, and the silver-based tin oxide electric contact material is prepared. The prepared silver-based tin oxide electric contact material has the advantages of being low in resistivity, high in fusion welding resistance, good in arc erosion resistance and easy to machine and shape.
Owner:YUEQING CHANGHONG ELECTRICAL ALLOY MATERIAL
Ultrasonic quantitative cleaning process for smooth surface of quartz substrate
ActiveCN119098439Asimple compositionImprove cleaning efficiencyCleaning using liquidsPhysical chemistryLow frequency band
The invention discloses an ultrasonic quantitative cleaning process for a smooth surface of a quartz substrate, relates to the technical field of quartz substrate cleaning, and aims to solve the problems that the cleaning process of the quartz substrate is inconvenient and the cleaning effect is poor. In the medium-frequency band analysis, the composition of the cleaning solution is optimized and the cleaning efficiency is improved through a fine solution ratio and a step-by-step adding mode, the advantages of a low-frequency band and a medium-frequency band are combined by combining a cleaning scheme, primary cleaning is performed firstly to remove most dirt, and then secondary cleaning is performed; then fine cleaning is conducted to deeply remove residues in tiny gaps, the efficient cleaning effect is achieved, through strict finished product detection, unqualified products can be found and treated in time in the production process, the unqualified products are prevented from flowing into follow-up procedures or markets, the production cost and the quality loss are reduced, a cleaning scheme is made again according to the comparison difference value, and the cleaning efficiency is improved. The maximization of the cleaning effect is ensured, the cleaning accuracy and efficiency can be remarkably improved, and meanwhile substrate damage caused by improper cleaning is reduced.
Owner:ANHUI HECHEN NEW MATERIAL CO LTD
Polyvinyl chloride sheath material for double-core optical fiber cable and preparation method of polyvinyl chloride sheath material
PendingCN119241964Areduce quality lossImprove heat resistancePlastic/resin/waxes insulatorsPolyvinyl chloridePolymethyl methacrylate
The invention discloses a polyvinyl chloride sheath material for a double-core optical fiber cable and a preparation method of the polyvinyl chloride sheath material, and relates to the technical field of wire and cable materials. The invention discloses a polyvinyl chloride sheath material for a double-core optical fiber cable. Comprising the following components in parts by weight: 80 to 120 parts of polyvinyl chloride resin, 25 to 35 parts of plasticizer, 2 to 8 parts of epoxidized soybean oil, 38 to 46 parts of calcium carbonate, 0.6 to 1.4 parts of polymethyl methacrylate, 2 to 3 parts of environment-friendly stabilizer, 0.4 to 1.2 parts of polyethylene wax, 0.1 to 0.3 part of antioxidant, 0.1 to 0.3 part of stearic acid, 4 to 8 parts of nano aluminum oxide and 2 to 4 parts of PVC processing modifier. The polyvinyl chloride sheath material has low thermal aging quality loss and low thermal shrinkage, the service life is prolonged, the two optical fibers of the double-core optical fiber cable can be torn and separated more easily, and construction and use are facilitated.
Owner:CGN TOP (SICHUAN) NEW MATERIALS CO LTD
Quartz fiber reinforced phenolic aerogel composite material with densified surface layer and preparation method of quartz fiber reinforced phenolic aerogel composite material
ActiveCN119116478Agood heat insulationMeet the needs of useSynthetic resin layered productsFuselage insulationThermal insulationPhenolic aldehyde
The invention belongs to the technical field of thermal insulation materials, and discloses a quartz fiber reinforced phenolic aerogel composite material with a densified surface layer and a preparation method of the quartz fiber reinforced phenolic aerogel composite material. The composite material comprises a densified surface layer and a light inner layer, the densified surface layer takes polycarbosilane modified bismaleimide resin as a matrix and quartz fiber woven cloth as a reinforcement; and the light inner layer takes phenolic aerogel as a matrix and quartz fiber needled felt as a reinforcement body. The preparation method comprises the following steps: connecting the surface layer woven fabric and the inner layer needled felt into a whole through needling, and then sequentially filling the surface layer matrix and the inner layer matrix. The aerogel composite material has the characteristics of ablation resistance, tough surface and heat insulation, the comprehensive density and the comprehensive mechanical property can be regulated and controlled, and the comprehensive requirements of heat insulation, low-speed impact resistance, light weight and certain mechanical strength of a large-area thermal protection structure of the windward side of a hypersonic speed device on the phenolic aerogel composite material can be met.
Owner:WUHAN UNIV OF TECH
Mutton quality improving and echelon processing and storing method and system
PendingCN119498391Aextended storage timeimprove qualityFood freezingOffice automationModified atmosphereIndustrial engineering
The invention belongs to but is not limited to the technical field of agricultural product storage, and discloses a mutton quality improving and gradient processing storage method which comprises the steps of cold storage, ice temperature and freezing storage. A modified atmosphere fresh-keeping packaging method; applying a natural biological fresh-keeping technology; and carrying out full-chain storage management. Through comprehensive application of cold storage, ice temperature and freezing in combination with a modified atmosphere fresh-keeping packaging technology, the storage time of the mutton is remarkably prolonged, and meanwhile the excellent quality of the mutton is kept. The cold storage and ice temperature technology effectively inhibits the growth and enzymatic reaction of microorganisms, delays the oxidation process of the mutton, and maintains the color, texture and flavor of the mutton; the quick freezing and ultrasonic unfreezing technology is adopted, so that the damage to the cell structure of the mutton in the freezing and unfreezing process is reduced to the maximum extent. By optimizing the unfreezing process, juice loss is reduced, the unfrozen mutton still keeps good texture and taste, and the problem of quality loss in a traditional method is solved.
Owner:SHAANXI SHOUNONG ZHENXUAN FOOD CO LTD
Electronic product quality evaluation comprehensive model design method
PendingCN119228230Aimprove quality levelreduce quality lossOffice automationResourcesEvaluation resultProcess engineering
The invention belongs to the technical field of electronic product quality evaluation, and discloses an electronic product quality evaluation comprehensive model design method. The quality evaluation comprehensive model design method comprises the steps of constructing a quality evaluation index system, inputting quality evaluation index system data corresponding to each stage, carrying out dimensionless processing by using an index value dimensionless method, carrying out weight processing by using an index weight method, and designing a quality evaluation comprehensive model. And performing comprehensive evaluation by using a quality comprehensive evaluation method to obtain a comprehensive evaluation result. According to the invention, electronic enterprises can be helped to better implement quality evaluation of complete machine-level, component-level and information system-level products, know the quality development trends of different electronic products in different stages, and further perform early warning on quality problems in different stages so as to reduce quality loss.
Owner:NANJING RES INST OF ELECTRONICS TECH
Preparation method of high-strength cement-based water permeable brick
PendingCN119219385AHigh permeability coefficientImprove flexural strengthFiberCompressive resistance
The invention relates to the technical field of preparation of water-permeable bricks, and provides a preparation method of a high-strength cement-based water-permeable brick, which comprises the following steps: selecting 30-40% by mass of ordinary Portland cement as a cementing material, selecting 20-30% by mass of lightweight aggregate, selecting 1-3% by mass of reinforced fiber, preparing 25-35% by mass of water-permeable material, and adopting an active mineral admixture to prepare the high-strength cement-based water-permeable brick. The preparation method comprises the following steps: preparing a cement-based water permeable brick with the mass ratio of 5-15%, preparing a water reducing agent with the mass ratio of 0.5-1.5%, and sequentially carrying out mixing stirring, molding treatment, maintenance treatment and surface treatment to obtain the high-strength cement-based water permeable brick. The cement-based water permeable brick disclosed by the invention realizes good balance of water permeability and strength of the cement-based water permeable brick, is relatively high in water permeability coefficient and capable of effectively draining water, and meanwhile, through reasonable material selection and proportioning, the water permeable brick is relatively high in compressive strength, excellent in breaking strength, freezing resistance and corrosion resistance and capable of meeting the requirements of various use scenes.
Owner:KAIHUA MINGHUI PLASTIC PRODUCTS CO LTD
A method for identifying and controlling scratch defects of cold-rolled high-strength steel
ActiveCN117299821BControl scratch defectsImprove product quality levelMetal rolling stand detailsRolling equipment maintainenceMetallurgyIndustrial engineering
This invention relates to a method for identifying and controlling scratch defects in cold-rolled high-strength steel, belonging to the technical field of metallurgical control methods. The technical solution of this invention is: a method for statistically analyzing and identifying the morphological characteristics of scratches in different processes of continuous casting, hot rolling, and pickling, as well as corresponding process control schemes, to comprehensively control key control points in each process. The beneficial effects of this invention are: by providing a method for identifying the morphological characteristics of scratches in different processes, and a control scheme for scratches in different processes, it effectively controls scratch defects in finished products, improves product quality, reduces quality losses, and simultaneously increases contract fulfillment rates.
Owner:HANDAN IRON & STEEL GROUP CO LTD +1
Method for freezing and refrigerating chestnut kernels
ActiveCN115868533BExtend freshnesskeep the original colorSeed preservation by coatingSeed preservation by freezing/coolingBiotechnologyChitosan coating
The present invention relates to a method for freezing and refrigerating chestnut kernels for preservation, and the specific method includes: sterilizing the chestnut kernels with a composite specific bactericide in coordination with slightly acidic electrolyzed water after pre-treatment of the chestnut kernels, then color-protecting the chestnut kernels with L-cysteine in combination with cold shock treatment, and finally slightly freezing and air conditioning after treating the chestnut kernels with chitosan coating. The present invention uses a specific bactericide needle combined with the synergistic effect of slightly acidic electrolyzed water to completely kill the pathogenic bacteria of chestnuts during storage; L-cys is used to change the molecular spatial structure of PPO that causes browning during chestnut kernel storage, thereby achieving the purpose of inhibiting PPO activity; a microenvironment with high CO2 and low O2 is formed on the surface of the fruit by using a chitosan coating treatment method, and combined with cold shock treatment, the respiration intensity can be reduced to inhibit the activity of PPO polyphenol oxidase and POD peroxidase, while also inhibiting the activity of PAL phenylalanine ammonia lyase, thereby reducing the synthesis of phenolic substances.
Owner:BEIJING BIHAI SHUNFA FOOD TECHNOLOGY CO LTD
A method and system for intelligent optimization and control of cold storage equipment for storage objects
ActiveCN119022574Bimprove energy efficiencyimprove protectionLighting and heating apparatusCooling fluid circulation
The present invention relates to the field of information technology, and discloses a method and system for intelligent optimization and control of cold storage equipment for storage objects. The method obtains the temperature sensitivity coefficients of different types of cold storage storage objects, and determines the respective temperature fluctuation acceptance ranges accordingly. Meanwhile, a temperature prediction model is constructed using historical data to predict the temperature change trend of the cold storage equipment under different control strategies. Based on the prediction results and characteristic parameters of the cold storage storage objects, the cold storage equipment control strategies that meet the temperature requirements are screened, and their energy consumption is evaluated to construct the Arrhenius equation to characterize the mass loss index of the cold storage storage objects in the candidate solutions. The candidate strategies are optimized in combination with a genetic algorithm, and the fitness function of the genetic algorithm is constructed through the mass loss index. The optimal control strategy is determined through the genetic algorithm and the execution of the cold storage equipment is controlled, thereby realizing accurate control of the cold storage temperature and energy efficiency optimization, and improving the intelligent level of cold storage management.
Owner:LISHUI POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER
Processing and forming method of high-voltage motor stator, high-voltage motor stator and high-voltage motor with stator
PendingCN119210058Areduce quality lossReduce security risksManufacturing stator/rotor bodiesEmbedding prefabricated windingsManufacturing cost reductionElectric machine
The invention discloses a high-voltage motor stator processing and forming method, a high-voltage motor stator and a high-voltage motor with the high-voltage motor stator. During stator processing, a ring type stator coil and a hanging handle ring type stator coil are processed and formed firstly, and then a whole-circle non-sectioning or sectioning embedding mode is adopted to form a ring type stator coil and a hanging handle ring type stator coil; respectively embedding the formed ring-type stator coil and the hanging handle ring-type stator coil into the stator iron core; the whole circle non-sectioning embedding is that the initial slot of the appointed sub-iron core pitch coil wire embedding uses the hanging handle ring type stator coil, and the residual slots are embedded with the forming ring type stator coil; according to split coil embedding, a hanging handle ring type stator coil is used in an initial slot of coil embedding of each stator core pitch coil, forming ring type stator coils are embedded in other slots, then a forming ring type stator coil of one pitch is reserved for each stator core, and the forming ring type stator coil is embedded after the stator core is assembled into a circle. The method is suitable for a whole machine non-split stator and also suitable for a split stator, the coil inserting and embedding efficiency can be effectively improved, the manufacturing cost is reduced, and the installation period is shortened.
Owner:DONGFANG ELECTRIC MACHINERY
Fast block partitioning method for multi-view video coding
ActiveCN119135892Aincreased complexityReduce coding complexityDigital video signal modificationCoding blockScale-invariant feature transform
The invention discloses a fast block division method for multi-view video coding, which comprises the following steps of: S1, reducing the resolution ratio of a coding frame in a sequence to be coded to be 1 / 2 of the original resolution ratio, and performing coarse intra-frame prediction and coarse inter-frame prediction by taking 16 * 16 pixels as units; s2, calculating an average offset vector Voffset (x, y) between the reference viewpoint and the referenced viewpoint by using an SIFT (Scale Invariant Feature Transform) feature extraction algorithm; s3, after the coding of the referenced viewpoint is completed, storing a depth map of the referenced viewpoint according to the division structure of each coding tree unit CTU of the referenced viewpoint; s4, for each CTU of the reference viewpoint, according to the position (x, y) of the CTU in the picture and the obtained average offset vector Voffset (x, y) before actual coding, constructing a depth region DR by taking the current to-be-coded block as a benchmark; s5, placing the constructed DR in the corresponding position of the referenced viewpoint, and summarizing the depth distribution of the depth map in the DR; s6, carrying out coding division on the reference viewpoint coding block; and S7, repeating the steps S4 to S6 on the coding blocks of all the reference viewpoints until all the coding blocks of the current viewpoint are coded.
Owner:HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
Water-swellable polyurethane elastomer and preparation method thereof
The invention relates to the technical field of polyurethane elastomer production, in particular to a water-swelling polyurethane elastomer and a preparation method thereof. The water-swelling polyurethane elastomer is prepared from a component A and a component B in a mass ratio of 100: (4-30) through reaction, wherein the component A is a prepolymer obtained by reaction of polyether polyol X and isocyanate, the functionality is 2.5-4, and the-NCO content is 3-5wt.%; and the component B is a curing agent component. The high-molecular-weight high-activity polyether polyol with the functionality of 2.5-4 is adopted as a raw material, the polyether polyol is low in potassium ion content, the polymerization reaction activity is moderate during prepolymer synthesis, the operation tolerance is high, production is convenient, and the defects that a traditional water-swelling polyurethane elastomer uses polyethylene glycol with the high potassium ion content as the raw material, and the production cost is low are overcome. And when the prepolymer is synthesized, the gel can be easily polymerized in a kettle.
Owner:SHANDONG INOV NEW MATERIALS CO LTD
Molecular sieve catalyst, preparation method thereof and application of molecular sieve catalyst in preparation of substituted aromatic hydrocarbon compounds
PendingCN119281376AImprove structural stabilityImprove wear resistanceCatalyst protectionMolecular sieve catalystsMolecular sieveAlkaline earth metal
The invention provides a molecular sieve catalyst, a preparation method thereof and application of the molecular sieve catalyst in preparation of substituted aromatic hydrocarbon compounds, and relates to the technical field of catalysts. The molecular sieve catalyst comprises a modified molecular sieve and a protective film coating the surface of the modified molecular sieve; wherein the modified molecular sieve comprises a molecular sieve carrier as well as an oxide of alkaline earth metal and an oxide of rare earth metal which are loaded in the molecular sieve carrier; wherein the protective film is a polysilicic acid protective film. The molecular sieve catalyst provided by the invention has excellent structural stability and wear resistance, and effectively avoids pulverization of the catalyst and loss of catalytic active components, thereby greatly prolonging the service life of the molecular sieve catalyst.
Owner:ZHEJIANG NHU CO LTD +1
Industrial preparation method of instant monopotassium phosphate
PendingCN119430107ARealize industrializationreduce usagePhosphorus compoundsO-Phosphoric AcidPhysical chemistry
The invention relates to the technical field of potassium phosphate preparation, and discloses an industrial preparation method of instant monopotassium phosphate, which comprises the following steps: transforming idle washing powder production equipment into an equipment system for preparing the instant monopotassium phosphate; preparing a potassium hydroxide solution with the concentration of 20-90% in an alkali dissolving tank; the method comprises the following steps: mixing a phosphoric acid solution with a potassium hydroxide solution for reaction to obtain a neutralization solution, and atomizing the neutralization solution into liquid drops through a pressure atomization system at the upper part of a drying tower. By breaking through waste heat recovery and utilization in industrial production, reform of a production process technology and establishment of an LTE (Long Term Evolution) technology, one-step puffing drying of a neutralization solution obtained by reaction of wet-process phosphoric acid and potassium hydroxide in a powder spraying tower is realized, and hollow, loose and porous KDP201 particles are formed.
Owner:ZHONGQING YILAN GRP CO LTD
Manufacturing process perception and quality control method and device based on multiple modes
PendingCN121979133AGuaranteed robustnessreduce wasteProgramme total factory controlSensing dataData ingestion
The invention discloses a manufacturing process sensing and quality control method and device based on multiple modes, and the method comprises the steps: collecting the multi-mode sensing data in the manufacturing process, and the multi-mode sensing data comprise image data, sound or vibration data and thermal imaging data; extracting process features corresponding to each mode based on the multi-mode perception data, and performing adaptive fusion on the process features of each mode based on an attention mechanism to generate a fusion feature vector; inputting the fusion feature vector and the current process parameter into a quality prediction model to obtain a prediction result of a preset quality index, and determining an influence relationship of the process parameter on the preset quality index based on the quality prediction model; and based on the prediction result, the influence relationship and a preset control target, optimizing and adjusting the process parameters so as to carry out feedforward control on the manufacturing process. Through multi-modal sensing, feature fusion and model prediction, online feedforward closed-loop control in the manufacturing process is realized, and the product quality consistency and the production efficiency are improved.
Owner:INST OF INTELLIGENT MFG GUANGDONG ACAD OF SCI
Method for solving bending problem of small square billet
InactiveCN119525279Areduce bendingfulfil requirementsWork cooling devicesMetal rolling arrangementsHeating furnaceSlow cooling
The invention relates to a method for solving bending of a small square billet, and belongs to the technical field of alloy steel smelting and continuous casting methods. According to the technical scheme, casting blanks are densely arranged on a stepping steel turnover cooling bed, and steel turnover operation is continuously conducted; after the casting blanks are discharged from the cooling bed, the adze blanks are hoisted from a collecting rack of the cooling bed and stored in a blank stack area, and slow cooling is conducted in a close-packed stacking mode. The method has the beneficial effects that the equipment investment and maintenance cost are saved, the production cost is reduced, the air-cooling bending degree of the casting blank is effectively controlled, the requirements of the steel rolling heating furnace are met, the casting blank can smoothly enter the steel rolling heating furnace, the process is simple and reliable, and the problem that the casting blank cannot enter the steel rolling heating furnace after being offline in the production process is solved. And the quality defect that the bending degree of the casting blank exceeds the standard easily occurs in the stacking and cooling process, and the quality loss is reduced.
Owner:HANDAN IRON & STEEL GROUP CO LTD +1
Novel plastic pelletizing device for electric cable
ActiveCN222115678Uimprove performanceincrease drynessPlastic recyclingElectric machineryStructural engineering
The utility model provides a novel plastic pelletizing device for an electric cable. The novel plastic pelletizing device for the electric cable comprises a box body, a pelletizing box is fixedly installed at the top of the box body, a pelletizing mechanism is arranged in the pelletizing box, two connecting lugs are arranged in the box body, a material guide plate is rotationally connected between the two connecting lugs through a rotating shaft, a through hole is formed in the box body, and the material guide plate is arranged in the through hole. The through holes are matched with a material guide plate, a sieve plate is arranged on the material guide plate, and a cover body is fixedly installed on the surface of one side of the box body. Through the pelletizing mechanism and the treatment mechanism, a first motor is started to enable a cutting wheel to cut plastics, plastic raw materials are cut into particles, the particles are cooled, the performance of the particles is stabilized, meanwhile, waste chips and dust can be avoided, and then the particles are dried through wind, so that the processing efficiency is improved. And the quality and the performance of particles are ensured.
Owner:JIANGSU BAOYUAN GAOXIN ELECTRIC
Upsetting-extruding opening and closing die
ActiveCN222344115Uprevent looseningavoid damageForging/hammering/pressing machinesMechanical engineering
Owner:CHONGQING QIXIN AUTO PARTS CO LTD
Powder metallurgy brake pad back plate with fluted structure
ActiveCN222542919UReduce cost lossreduce quality lossBraking membersStructural engineeringMechanical engineering
The utility model discloses a powder metallurgy brake pad back plate with a fluted structure, which belongs to the technical field of vehicle brake devices and comprises a steel back, a pin shaft arranged on the back of the steel back and a friction body arranged on the front of the steel back. The steel backing is of a hexagonal plate-shaped structure and is integrally forged and formed with the pin shaft arranged in the center of the back face. A groove for embedding the friction body is formed in the front end face of the steel backing; the groove is hexagonal and is concentric with the steel backing, and six edges of the groove are respectively parallel to the edge of the steel backing. According to the friction block, the flutes can be in full contact with a friction material, the bonding strength of the friction material and the back plate is improved, the production stability of the friction block is improved, and the production cost and the mass loss of the friction block are effectively reduced.
Owner:BOSUN TOOLS CO LTD
A hierarchical scheduling optimization method and platform for multi-resource dynamic balancing of engineering projects
PendingCN122596546AOvercome the out-of-synchronization phenomenon of strongly coupled resourcesAlleviate idling
The application discloses a layered scheduling optimization method and platform for multi-resource dynamic balancing of engineering projects, and belongs to the technical field of engineering project scheduling optimization. The method comprises the following steps: an engineering project data model containing an activity directed acyclic graph, multi-type resource requirements and milestone constraints is established; a resource coupling coefficient is calculated, and a feasible time window in the form of a multi-section closed interval union is generated for each activity; a resource pool quota is allocated among projects according to a resource urgency index at a strategic layer; adaptive rolling rescheduling is started according to four types of trigger conditions at an operation layer; and a cross-layer bidirectional closed loop is formed through step-by-step feedback. The platform comprises the following modules: a multi-source data acquisition module, a biological meteorological window management module, a resource demand prediction module, a three-layer scheduling engine module and the like. The application can simultaneously realize single-resource balancing and cross-resource collaboration, so that the scheduling result has biological meteorological sensitivity, and can quickly respond when a disturbance arrives, thereby relieving on-site work, improving resource pool utilization and reducing the deviation of the construction period.
Owner:FUHUA ECOLOGICAL ENVIRONMENT CO LTD
Direct mass spectrometry device and method for trace uranium in water body
PendingCN121954583Aaccurate analysisreduce quality lossPreparing sample for investigationMaterial analysis by electric/magnetic meansSolventMass spectrometric
The invention discloses a direct mass spectrometry device and method for trace uranium in a water body, and relates to the technical field of analys.The method comprises the steps that a gel film is soaked in uranium-containing wastewater and taken out, a tip is cut out, and the uranium-adsorbed gel film is obtained; dropwise adding an extracting agent on the gel film, and then applying high voltage on the gel film, so that uranium adsorbed on the gel film is extracted and moves towards the tip along with the solvent to form spray; uranium is ionized in the form of uranyl acetate and detected by a mass spectrum detection system; according to the invention, accurate analysis of trace uranium can be realized, and mass loss of uranium in a water sample due to links such as sample treatment and preservation is avoided. The device can be applied to various complex water environments, and direct mass spectrometry can be realized only by shearing gel into a triangular shape with a tip and applying voltage and an extracting agent during analysis. And the method has the advantages of high analysis speed, good linear relationship, low detection limit and the like.
Owner:EAST CHINA UNIV OF TECH
Droplet driving structure and preparation method thereof
PendingCN119549206ASustained driving forceContinuous transportationChemical/physical/physico-chemical microreactorsLaboratory glasswaresMechanical engineeringLiquid drop
The invention provides a droplet driving structure and a preparation method thereof, and relates to the technical field of driving structures. The liquid drop driving structure comprises a series wedge-shaped groove structure; the series wedge-shaped groove structure comprises a plurality of wedge-shaped grooves which are connected in sequence; in the driving direction of liquid drops, the narrow end of one wedge-shaped groove is connected with the wide end of the other wedge-shaped groove; the contact interface of the series wedge-shaped groove structure and the liquid drop is a wettability gradient interface, and the wettability of the contact interface of each wedge-shaped groove and the liquid drop is different, so that the liquid drop is driven to move from the narrow end of one wedge-shaped groove to the wide end of the other wedge-shaped groove. According to the invention, the potential barrier at the joint of the wedge-shaped grooves can be reduced, and continuous driving force is provided for liquid drops, so that the liquid drops move from the narrow end of one wedge-shaped groove to the wide end of the other wedge-shaped groove, the liquid drops are promoted to be better continuously transported, and long-distance continuous transportation of the liquid drops is better realized.
Owner:INNER MONGOLIA UNIVERSITY
Compounds of formula (I) and their use in organic electronic devices
PendingCN122502311AImprove LUMO energy levelImprove dipole moment
Owner:NOVALED GMBH
High-freezing-resistance cement stabilized macadam mixture and preparation method thereof
The invention relates to a high-freezing-resistance cement stabilized macadam mixture and a preparation method thereof, and the high-freezing-resistance cement stabilized macadam mixture comprises the following raw materials in parts by mass except polypropylene fiber: 75 parts of coarse aggregate, 25 parts of fine aggregate, 5 parts of cement, 0.15-0.35 part of expanding agent, 0.1-0.25 part of latex powder, 0.05-0.1 part of water-absorbent resin, 5.89-6.12 parts of water according to the volume ratio of the polypropylene fiber to cement stabilized macadam (formed by mixing the raw materials) of (1-2): 1000. Compared with the prior art, the cement stabilized macadam mixture applicable to the road base in the Tibetan region, provided by the invention, has good anti-freezing performance after 5 times and 10 times of freezing and thawing cycles, the problem that a common cement stabilized macadam base is difficult to meet the anti-freezing performance of a Tibetan region is solved, and the applicable requirement of the road base in the Tibetan region is met.
Owner:SOUTHEAST UNIV
Non-combustible paper and preparation method thereof
PendingCN119266019AImprove flame retardant performanceReduce heat release rateCoatings with pigmentsWater-repelling agents additionOxidation resistantInorganic materials
The invention discloses non-combustible paper and a preparation method thereof, and relates to the technical field of non-combustible paper. The novel newsprint paper comprises base paper, a crystal film is embedded in the base paper, the base paper is coated with a curing layer, the curing layer is coated with a hydrophobic coating, and the base paper is newsprint paper. According to the invention, the crystallization film, the curing layer and the hydrophobic coating are formed on the newsprint, the crystallization film absorbs and disperses heat and enhances the flame retardant property of the non-combustible paper, and the curing layer reduces the heat release rate and mass loss of the non-combustible paper and improves the mechanical strength and stability of the non-combustible paper at the same time; the hydrophobic coating enables the non-combustible paper to have the characteristics of water resistance, fog resistance, oxidation resistance, corrosion resistance and the like, so that the non-combustible paper can keep good performance in different environments, the service life of the non-combustible paper is prolonged, the stability of the non-combustible paper is further improved, meanwhile, the non-combustible paper is prevented from being ignited by flames in a fire disaster, and the service life of the non-combustible paper is prolonged. The crystallization film, the curing layer and the hydrophobic coating are made of inorganic materials, so that the prepared non-combustible paper is non-toxic, odorless, green and environment-friendly.
Owner:NINGBO RUIQI INTELLIGENT EQUIPMENT CO LTD
A production process and production equipment of plastic adhesive resin
The invention discloses a production process and production equipment of a plastic adhesive resin, comprising a stirring tank, wherein a stirring shaft is arranged in the stirring tank, the stirring shaft is driven to rotate by a motor assembled on the top of the stirring tank, a plurality of stirring rods are arranged on the surface of the stirring shaft, the discharge port of the stirring tank is connected with a processing box, a processing mechanism is arranged in the processing box, and is used for cooling and screening the fallen materials; a plurality of stirring mechanisms are arranged on the inner side wall of the stirring tank, the stirring mechanisms are slidably connected with the inner wall of the stirring tank, and the stirring mechanisms can make horizontal movements toward the middle of the stirring tank; a flow guide pipe is arranged around the outer peripheral surface of the stirring tank, and the parts of the inner end surface of the flow guide pipe corresponding to each stirring mechanism are all connected with a connecting pipe, and the other end of the connecting pipe is connected to the outer wall of the stirring tank. The invention drives the raw materials at the inner edge of the stirring tank to flow to the middle part through the design of the stirring mechanism, thereby solving the defect that the materials in the dead angle area of the existing stirring tank cannot be effectively stirred, resulting in uneven mixing.
Owner:XIAMEN KEAISI PLASTICS TECH