13results about How to "Good batch consistency" patented technology

The utility model discloses a kind of multi-axis layered linkage blade lever for small circuit breaker, comprising: lever body, it is the special-shaped plate member of integrated molding;Main pivot hole, the lever body can rotate around the main pivot hole;First lateral transmission column, for cooperating with circuit breaker handle or superior linkage member;Second lateral transmission column, set in the middle pivot area;Third lateral transmission column;Wherein, the first lateral transmission column, the second lateral transmission column and the third lateral transmission column are layered arrangement along the lever body height direction, and form stepped overhanging structure in the lever body thickness direction, so that handle linkage member, blade driving member and spring energy storage member can be respectively located in different movement level.This multi-axis layered linkage blade lever for small circuit breaker integrates multiple components on a special-shaped plate lever body, with the characteristics of high part integration, good assembly precision and small movement interference.

The invention discloses a preparation method of high-stability superoxide dismutase (SOD), and belongs to the technical field of bioengineering and enzyme engineering. The method comprises the following steps: chemically modifying purified SOD (superoxide dismutase) under the conditions of low temperature and neutral pH (potential of hydrogen) by taking monomethoxy polyethylene glycol succinimido active ester as a modifier; carrying out ultrafiltration preliminary purification on the reaction liquid, then carrying out deep purification through ion exchange chromatography, and separating to obtain a high-purity modified product; and finally, sterilizing, filtering and freeze-drying to obtain the freeze-dried powder. According to the method, by optimizing a modification and purification process, the thermal stability and protease degradation resistance of SOD are remarkably improved, and meanwhile, most enzyme activity of SOD is effectively reserved. The prepared PEG-SOD product is high in purity and good in stability, and is suitable for preparing anti-inflammatory, anti-oxidation or anti-aging medicines and functional foods.

The invention relates to the technical field of firework cylinders, in particular to a firework mold pressing cylinder based on cassava flour pregelatinization and a preparation method thereof, and the mold pressing cylinder is prepared from the following raw materials in parts by weight: a framework material compounded by crystal transformation method II type anhydrous gypsum and calcium carbonate stone powder, pregelatinized cassava flour, wood fibers, stearic acid and a proper amount of water. The tapioca flour is pre-gelatinized by warm water at 40-60 DEG C, and the pre-gelatinization degree is greater than or equal to 80 The crystal transformation method II type anhydrous gypsum is prepared from ardealite through a low-temperature crystal transformation method. The preparation method comprises the following steps: pre-gelatinizing the tapioca flour, pulping, mixing with other dry blends and hot water, and finally carrying out high-temperature compression molding. Through the synergistic effect of the pre-gelatinized tapioca flour and the crystal transformation method gypsum, the dry basis dosage of the tapioca flour is remarkably reduced, meanwhile, the compressive strength and the falling resistance of the mold pressing barrel are greatly improved, the multiple purposes of reducing the cost, improving the performance and absorbing industrial solid waste phosphogypsum are achieved, the product quality is stable, and the mold pressing barrel is suitable for industrial production.

This invention relates to the field of calcium sulfate cementitious material preparation technology, specifically to a precise calcination method for the phase composition of building gypsum powder. The invention discloses a precise calcination method for the phase composition of building gypsum powder, comprising: washing, drying, and homogenizing industrial solid waste gypsum, and then feeding it into a two-stage series fluidized bed calciner; calculating the partial pressure of water vapor in the dehydration section in real time based on material balance and adjusting the exhaust damper; simultaneously sampling and measuring the water of crystallization every 10 minutes and using feedback to control the calcination temperature, so that the dehydration operation point is locked in the thermodynamically stable zone of β-hemihydrate gypsum; the calcined product is then ground after short-range aging in a fluidized bed aging chamber to obtain building gypsum powder. This invention achieves precise control of phase composition through a dual feedback closed loop of water vapor partial pressure and water of crystallization. The resulting building gypsum powder has a hemihydrate gypsum content ≥90%, soluble anhydrous gypsum ≤6%, small fluctuation in setting time, and good batch consistency, making it a high-quality cementitious base material for lightweight building materials.

This invention discloses an integrated online multi-stage gradient oxidation modification process and production line for carbon black, belonging to the field of carbon black production technology. Based on an oil furnace carbon black production line, this invention sequentially sets up a three-stage gradient oxidation unit: oxygen pre-oxidation via pneumatic conveying pipeline, gas-phase oxidation via vertical fluidized bed ozone-oxygen, and liquid-phase oxidation via a wet granulator with hydrogen peroxide. Each unit can be started and stopped independently and freely combined. The oxidized carbon black can be flexibly produced in multiple forms, including powder, wet granulation, and dry granulation. This invention integrates carbon black production and oxidation modification control, allowing precise control of oxygen-containing functional groups on the carbon black surface. The process flow is compact, with a single unit having an oxidation capacity of up to 60 tons / day. It features low energy consumption, high product stability, and is suitable for large-scale industrial continuous production.

The invention discloses a process and a system for producing silicon dioxide micro powder by a wet method. The process comprises the following steps: preparing a glue solution by using pure water and chemical polymer glue accounting for 0.1-1% of the solution; mixing silicon dioxide powder with D50 of 0-8 [mu] m with the glue solution to prepare slurry with the solid content of 5-70%; carrying out stepped defoaming treatment on the slurry by adopting a stepped vacuum standing defoaming device; and finally, carrying out spray drying on the defoamed slurry to obtain the product. The stability and formability of the slurry are guaranteed from the source through the specific polymer glue solution; by means of the stepped defoaming system integrating primary buffer tank coarse defoaming, secondary vacuum tank deep segmentation defoaming and tertiary surge tank undisturbed storage, various bubbles from the millimeter level to the submicron level in the slurry are efficiently removed, the defoaming problem of the high-solid-content slurry is thoroughly solved, the treated slurry is subjected to spray drying, and then the slurry is subjected to spray drying, so that the high-solid-content slurry is obtained. The silicon dioxide micro powder with regular particle morphology, narrow particle size distribution, good fluidity, large apparent density and excellent batch consistency can be obtained, and the high-end application requirement is comprehensively met.

The present application relates to the technical field of conductive paste, and particularly relates to a silver-coated copper conductive paste and a preparation method thereof. The silver-coated copper conductive paste comprises the following components: silver-coated copper powder, an organic carrier and a functional additive; the organic carrier comprises modified resin, a compounded solution and a plasticizer; the functional additive comprises a composite dispersant, an antioxidant additive and an adhesion promoter; wherein the modified resin comprises one or more of carboxylated epoxy resin or aminated acrylic resin; the compounded solution comprises one or more of ethylene glycol butyl ether acetate or butyl acetate. In the present application, the interface compatibility between the conductive filler and the carrier is effectively improved by optimizing each component in the conductive paste, and the adhesion reliability on the flexible substrate is particularly enhanced. The present application further discloses a preparation method of the silver-coated copper conductive paste, realizes uniform mixing of each component, and finally realizes the synergistic improvement of low silver cost, high conductivity and high adhesion.

The application discloses a bus multi-material resistance welding process and a gradient current-distribution electrode structure and belongs to the technical field of resistance welding.The application integrates an electrode quick-change mechanism in a single welding station, can automatically switch a chromium-zirconium-copper inlaid tungsten-copper electrode and a graphite electrode, respectively completes two types of welding procedures of copper braided wire-copper plate and copper plate-L-shaped copper bent plate, adopts a gradient current-distribution electrode with a waist-shaped through groove on a working surface in a matched mode, realizes uniform distribution of current in a large-area welding area with a size of 21*15 mm or above, simultaneously constructs a full-process automatic production line of "welding-air knife cleaning-CCD visual detection-automatic sorting", and effectively solves problems of uneven welding current of large-area copper workpieces, low electrode change efficiency, easy interference of detection by cooling water and the like, electrode switching time is less than or equal to 5 s, the welding point drawing force is stable, the bus welding full-process unmanned operation can be realized, and production efficiency and product consistency are greatly improved.

The invention discloses a method for increasing the content of gamma-aminobutyric acid in traditional Chinese medicine through fermentation. The method comprises the following steps: S1, superfine grinding of raw materials; s2, performing enzymolysis treatment; s3, fermentation treatment; lactobacillus plantarum and lactobacillus reuteri are selected to be matched for fermentation. A compound enzyme system (cellulase, pectinase and hemicellulase) is added, and the enzyme addition amount is 600 U / g-1400 U / g; the content of GABA in a bacterium synergistic fermentation system is obviously higher than that of a single bacterium fermentation system. Experimental data show that the GABA content can reach 131.5 + / -0.7 [mu] mol / g under the synergistic fermentation condition for 48 h, the GABA content under the lactobacillus plantarum single bacterium fermentation condition and the GABA content under the lactobacillus reuteri single bacterium fermentation condition are 45.5 + / -1.1 [mu] mol / g and 29.9 + / -2.1 [mu] mol / g respectively, the GABA yield is increased by about 2.9-4.4 times through synergistic fermentation, and it is proved that the method can effectively promote efficient conversion and accumulation of glutamic acid into GABA.

The invention discloses an RNA (Ribonucleic Acid) aptamer for specifically recognizing rice Cerebron as well as a screening method and salt tolerance application of the RNA aptamer. A random oligonucleotide library is screened, amplified and deeply sequenced by adopting an SELEX (systematic evolution of ligands by exponential enrichment) technology in combination with His-tag agarose beads to obtain an RNA (Ribonucleic Acid) aptamer Cereblock with high affinity and high specific binding capacity with the OsCRBN, the expression level of the OsCRBN can be stabilized under a salt stress condition by expressing the RNA aptamer Cereblock in rice, and the expression level of the OsCRBN can be stabilized under a salt stress condition. The ubiquitination level of protein in the rice is improved, and a protein aggregation structure is changed, so that the salt tolerance of the rice is improved. The RNA aptamer provided by the invention is small in molecular weight, capable of being chemically synthesized, low in cost, strong in affinity and specificity, convenient to mark, good in repeatability and stability and easy to store, has a definite application value of improving salt tolerance, and has a good popularization potential.

The application relates to the technical field of curtain wall and special-shaped section processing, and particularly discloses a double-curved stretch bending processing technology, which comprises the following steps: performing stretch bending evaluation through three-dimensional modeling and a BIM system; performing section optimization on a mold drawing and storing the mold drawing; designing a processing mold according to model parameters; manufacturing a filling strip according to a negative tolerance and installing a chuck mold; performing stretch bending forming and automatic springback compensation through numerical control equipment; comparing and correcting through three-dimensional scanning; performing profiling detection and correction on a special jig; performing aging treatment to improve material performance; performing surface treatment and protection; and uploading full-process data to a cloud platform to realize traceable management. Through the integration of digitalization and intelligentization technology, the application realizes high-precision and batch manufacturing of double-curved and special-shaped sections, and effectively solves the problems of difficult precision control and unstable quality in traditional processes.

This invention discloses a self-balancing wide-range spherical capacitive sensing device and its range customization method, belonging to the field of capacitive sensing technology. The device includes a spherical outer electrode, a compressible elastic inner electrode, a flexible porous filling layer, and a signal processing circuit. The spherical outer electrode is a breathable porous conductive spherical shell with uniformly interconnected pores, serving as a protective outer shell and achieving 360° omnidirectional pressure response. The compressible elastic inner electrode is a sealed elastic airbag with a conductive layer, containing a reference cavity pre-filled with reference gas, forming a self-balancing pressure-bearing structure. The flexible porous filling layer fills the gap between the two electrodes, maintaining concentricity and ensuring uniform deformation. This invention achieves ultra-wide range measurement through the nonlinear superposition of the characteristics of the enclosed gas and the spherical capacitor, supporting user-defined range intervals. It also features impact resistance, waterproofing, corrosion resistance, and omnidirectional sound pressure pickup capabilities, with a simple structure and high mass production capability.

The invention provides a filter chip prepared by adopting a multi-layer winding inductor and a preparation method of the filter chip, and relates to the technical field of filter chips, and the filter chip comprises an input port bonding pad, an output port bonding pad, the multi-layer winding inductor and a chip capacitor; the multi-layer winding inductor comprises a winding inductor, a dielectric layer and a metal ground, the winding inductor is arranged on the upper side of the dielectric layer, and the metal ground is arranged on the lower side of the dielectric layer; the input port bonding pad is connected with the input end of the chip capacitor and is connected with the multi-layer winding inductor; the output port bonding pad is connected with the output end of the chip capacitor and is connected with the multi-layer winding inductor; the chip capacitor is connected with the multi-layer winding inductor; the winding inductor comprises top-layer metal, bottom-layer metal and a substrate, a substrate metal through hole is formed in the substrate, the top-layer metal is located on the upper side of the substrate, the bottom-layer metal is located on the lower side of the substrate, and the top-layer metal and the bottom-layer metal are connected through the substrate metal through hole. The filter chip has the advantages that the inductance Q value of the filter chip is improved, and the application range of the filter chip is expanded.