9results about How to "No impurities" patented technology

This utility model provides an intelligent multi-stage spray sterilization device with self-cleaning function, belonging to the field of bayberry spray sterilization technology, to solve the problem that the fixed nozzles cannot be adjusted according to the size and surface contamination of the bayberries; it includes a mesh belt conveyor; side baffles are fixedly installed on both sides of the top of the mesh belt conveyor; a sterilization mechanism is fixedly installed between the two sets of side baffles, and a spray device is fixedly installed between the top of the two sets of side baffles; the spray device is set in four places, and a flipping mechanism is set between the two spray devices; through the coordinated action of components such as double-headed screws, sliding seats, drive plates and load-bearing seats, the operator can accurately adjust the position of the spray pipes and nozzles according to the actual size of the bayberries; at the same time, an infrared distance sensor can monitor the distance between the nozzles and the bayberries, and the control module automatically adjusts the opening of the solenoid valve according to the preset program to control the spray volume.

This invention discloses high-entropy rare-earth silicate ceramic nanopowders, their preparation methods, and applications. The preparation method of the high-entropy rare-earth silicate ceramic nanopowders of this invention includes the following steps: 1) dissolving rare-earth oxide powder in an acid solution to prepare a rare-earth salt solution, then adding urea and silica powder and performing a gelation reaction to obtain a gel; 2) igniting the gel for combustion synthesis, grinding, and obtaining a precursor powder; 3) calcining the precursor powder to obtain the high-entropy rare-earth silicate ceramic nanopowders. The high-entropy rare-earth silicate ceramic nanopowders of this invention possess excellent characteristics such as fine particle size, uniform elemental distribution, large component space, and absence of impurities. Furthermore, its preparation method has advantages such as fast synthesis speed, simple equipment, simple and controllable process, and low industrialization cost, making it suitable for application in hot-end components of aerospace engines and possessing very broad application prospects.

The utility model provides a basalt fiber production temperature control system, and belongs to the field of basalt fiber production, the basalt fiber production temperature control system comprises a PLC controller, a power regulator, a thermocouple, a smelting furnace and a wire drawing bushing plate, the smelting furnace comprises a plurality of heating zones, each heating zone is provided with a plurality of electrodes, the electrodes are electrically connected with a current transformer, the current transformer is electrically connected with an electric smelting transformer, and the electric smelting transformer is electrically connected with the thermocouple. The electric smelting transformer is electrically connected with the first power regulator, the first power regulator is electrically connected with the PLC, the first thermocouple is electrically connected with the PLC, and the first thermocouple is inserted into basalt melt in the smelting furnace; the second power regulator is electrically connected with the PLC, the second power regulator is electrically connected with a bushing plate transformer, the bushing plate transformer is electrically connected with the wire drawing bushing plate, the second thermocouple is electrically connected with the PLC, and the second thermocouple is installed on the wire drawing bushing plate. According to the temperature control system, the basalt melt is heated more uniformly, and the temperature of the electrode is controlled by controlling the current, so that the temperature of the basalt melt is controlled.

This invention provides a method for preparing 1,2-propanediol and its application. The method includes: step (1): in the presence of an acidic catalyst and water, ring-opening of a first portion of propylene oxide to obtain an acid-catalyzed reaction solution containing 1,2-propanediol; step (2): in the presence of an alkaline catalyst and water, ring-opening of a second portion of propylene oxide to obtain an alkaline-catalyzed reaction solution containing 1,2-propanediol; step (3): mixing the obtained acid-catalyzed reaction solution and the alkaline-catalyzed reaction solution for a neutralization reaction to obtain a mixture containing 1,2-propanediol; wherein, the molar ratio of the first portion of propylene oxide to water in step (1) and the molar ratio of the second portion of propylene oxide to water in step (1) are each independently 1:1-5; using the method of this invention to prepare 1,2-propanediol requires only a lower water ratio to obtain a higher propylene oxide conversion rate and 1,2-propanediol content, and the wastewater volume is lower and the color is colorless after the reaction.

This invention provides a (Hf,Zr,Ta,Ti)B2-SiC ceramic powder and its preparation method, belonging to the field of high-entropy boride ceramics technology. This invention uses excess B4C powder to ensure more complete reaction of the metal oxide powder, forming a single-phase (Hf,Zr,Ta,Ti)B2 ceramic powder without impurity formation. Using SiC powder as a filler phase further improves both the density and bulk density of the (Hf,Zr,Ta,Ti)B2-SiC ceramic powder. Spray granulation further enhances the flowability of the (Hf,Zr,Ta,Ti)B2-SiC ceramic powder, ensuring that the resulting (Hf,Zr,Ta,Ti)B2-SiC ceramic powder, when coated using plasma spraying technology, achieves a high density of the (Hf,Zr,Ta,Ti)B2-SiC ceramic coating.

The utility model relates to gasoline detection technical field, concretely is a kind of gasoline oil sample detection device, including storage bottle, pivot, flexible hose, device lid and device main body, storage bottle outside fixed mounting has No. 3 threaded tube, device lid outside fixed mounting has No. 2 threaded tube, flexible hose outside fixed mounting has No. 1 threaded tube, No. 3 pivot outside fixed mounting has threaded fan blade, pivot outside fixed mounting has rotating counterweight, rotating counterweight outside is connected with gear assembly, the device design is by mechanical drive and can extract gasoline in the automobile fuel tank and carry out detection, so that it can ensure fuel quality, by the gasoline in the automobile fuel tank detection, can ensure that the quality of fuel meets relevant standards and requirements by the gasoline in the automobile fuel tank detection can prevent failure, avoid the engine failure caused thereby.

This invention discloses an automated PVB film precision cutting and lamination production line, relating to the field of laminated glass production technology. It includes a first transport structure, a second transport structure, a third transport structure, and a fourth transport structure. The first transport structure is equipped with a detection mechanism, an automatic alignment structure, and a defective product pushing mechanism. A first servo module is used to transport the upper glass sheet, and a second servo module is used to transport the precision-cut PVB film. These components, along with a lifting assembly and a suction cup assembly, achieve alignment and lamination with the lower glass sheet. The second transport structure has a laser heating end and is equipped with a laser precision cutting robot to enable on-site cutting and use of the PVB film. This automated PVB film precision cutting and lamination production line operates within a cleanroom, automatically aligning and positioning the glass, performing clean online precision cutting, and automating the entire lamination process. It solves the problems of low manual efficiency, easy shrinkage and deformation of the film, and poor cutting accuracy, saving on cleanroom equipment costs. It features a high degree of automation, stable lamination quality, and is suitable for large-scale, efficient production of PVB laminated glass.

The application discloses a controllable water-permeable solidified grouting material and a preparation method and application thereof, belongs to the technical field of geotechnical engineering foundation reinforcement and underground cavity filling, and aims to solve the technical problem that existing grouting materials are difficult to keep a certain solidified strength and accurately control the water permeability coefficient according to geological requirements to adapt to different hydrogeological environments. The controllable water-permeable solidified grouting material comprises, in weight parts, 45-55 parts of a main solidified base material, 8-18 parts of a water-permeable control system, and 25-35 parts of deionized water. The water-permeable control system comprises porous volcanic rock powder, lignin fiber and modified bentonite, and the mass ratio of the porous volcanic rock powder, the lignin fiber and the modified bentonite is 50:35:15. The porosity of the porous volcanic rock powder is 45%-55%, the length of the lignin fiber is 3 mm-6 mm, and the expansion rate of the modified bentonite is 150%-280%.

This invention discloses lactic acid bacteria strains capable of converting rutin and their application in the fermentation of locust flower yogurt. The lactic acid bacteria strains are *Enterococcus faecium* Y4-1, *Enterococcus faecium* Y4-2, and *Lactococcus petauri* Y5-4. When used as starter cultures, these lactic acid bacteria strains can metabolize rutin into flavonoids such as quercetin and isoquercetin, improving the total flavonoid content and antioxidant activity of the fermented food. The resulting set-type locust flower yogurt is uniformly pale yellow, with a rich and distinctive locust flower aroma, good coagulation without impurities, no whey separation, a sweet and sour taste, excellent sensory properties, and high DPPH free radical scavenging capacity and Fe... 2+ Its chelating capacity and total antioxidant capacity are superior to those of locust flower yogurt produced with commercial starter cultures.