11results about How to "Less destructive" patented technology

The present application relates to a kind of methods for preparing fluorescent nitrogen-rich carbon quantum dots from coal in aqueous system based on photocatalytic technology, belonging to the technical field of nanomaterial preparation.The method includes pretreatment of coal, ammonia oxidation reaction of coal and ammonia water to obtain nitrogen-rich soluble, the nitrogen-rich soluble is subjected to photocatalytic reaction again, and finally, carbon quantum dot solid powder is prepared by centrifugation, filtration, dialysis and drying treatment.The present application realizes the preparation of fluorescent nitrogen-rich carbon quantum dots from low-rank coal in aqueous system by using ammonia oxidation and photocatalytic technology, and the reaction conditions are mild and green and non-toxic, without harsh reaction conditions such as high temperature / high pressure, strong acid / strong base environment, organic solvent or special equipment.

The invention relates to the field of building repair, and aims to provide a rammed earth wall reinforcing structure which comprises a strip-shaped foundation, a rammed earth wall and a plurality of semi-prefabricated reinforcing units. A plurality of embedding cavities are formed in the front face connecting position and the back face connecting position of the strip-shaped foundation and the rammed earth wall. The embedding cavities at the front surface connecting part and the embedding cavities at the back surface connecting part are sequentially and alternately distributed along the length direction of the strip-shaped foundation; the semi-prefabricated reinforcing units correspond to the embedding cavities in a one-to-one mode, each semi-prefabricated reinforcing unit comprises a concrete embedded block and a steel bar reinforcing cage, the concrete embedded blocks are plugged at cavity openings of the embedding cavities, and cast-in-place combination areas are formed by the concrete embedded blocks and the interiors of the embedding cavities; one end of the reinforcement cage is embedded in the concrete insert block, and the other end of the reinforcement cage extends into the cast-in-place combination area; a grouting opening communicated with the cast-in-place combination area is formed in the lower portion of the concrete embedded block, and grouting materials are poured into the cast-in-place combination area. The rammed earth wall and the foundation thereof can be effectively structurally reinforced, and the original structural features of the rammed earth wall and the foundation thereof are kept.

The utility model discloses a naphtha dechlorination device, which relates to the technical field of dechlorination equipment and comprises a tank body, a mounting shell is mounted at the top end of the tank body, a rotating component is mounted in the mounting shell and comprises a rotating motor mounted in the mounting shell, and the output end of the rotating motor is connected with a first bevel gear. One side of the top end of the first bevel gear is in meshed connection with a second bevel gear, the middle of the second bevel gear is fixedly connected with a first rotating rod, one side of the bottom end of the first bevel gear is in meshed connection with a third bevel gear, the first rotating rod is arranged on the inner wall of the third bevel gear in a sleeving mode and is rotationally connected, and a fixing support is installed on the inner wall of the tank body; according to the utility model, the inner stirring blade and the outer stirring blade respectively rotate in opposite directions by utilizing the rotating assembly to form a complex three-dimensional flow field, and when the inner-layer stirring blade rotates in the forward direction, materials in a central area are driven to quickly circulate, so that a dechlorinating agent is quickly dispersed into a naphtha main body.

The utility model discloses an embodiment relates to the technical field of connector, especially discloses a kind of connector and electronic equipment, including insulating body, terminal assembly, lock catch assembly, elastic member and linkage assembly, insulating body is provided with slot and first connecting groove, slot is used for electronic card insertion, terminal assembly is set to insulating body, lock catch assembly includes lock catch piece, lock catch piece is provided with first connecting part, first connecting part is movably inserted in first connecting groove, so that lock catch piece can move along first direction and second direction, elastic member is supported in insulating body and lock catch piece, linkage assembly includes linkage piece and ejector, linkage piece is movably set to insulating body, one end of linkage piece is movably connected with lock catch piece, ejector is rotatably set to insulating body, part of ejector is set to slot, and the other end of ejector is movably connected with linkage piece. By the above-mentioned mode, the utility model embodiment realizes that connector lock card is firm.

This invention provides a tunnel-type garment smoothing machine, belonging to the field of garment smoothing technology. It includes a housing with through slots at both ends, forming a smoothing channel between the slots. A steam ironing component and a drying component are installed within the smoothing channel. A conveyor component runs through the smoothing channel, passing sequentially through the steam ironing and drying components to smooth the garments. This invention uses a conveyor component to guide the garments through the smoothing channel, and the steam ironing and drying components, sequentially arranged within the channel, achieve steam smoothing and drying of the garments. Compared to tumble drying, this method causes less damage to the garments, and the entire process is friction-free and undamaged.

The utility model discloses a lossless and pollution-free silicon carbide particle mixing device and relates to the technical field of silicon carbide crystals. Comprising a magnetic oscillator, a mixing grid plate, a base and a cylindrical side wall with upper and lower openings, the base is adsorbed on the magnetic oscillator; the multiple cylindrical side walls are sequentially stacked on the base from bottom to top, and the cylindrical side walls are detachably connected with the base and detachably connected with the base. A material mixing grid plate is placed at the insertion port of each cylindrical side wall, a gap exists at the joint of every two adjacent cylindrical side walls, and SiC powder and a doping agent are placed on the material mixing grid plates; the particle size of the SiC powder and the particle size of the doping agent are both larger than the mesh aperture of the mixed material mesh plate; the silicon carbide powder mixing device can realize lossless, efficient and pollution-free mixing of silicon carbide powder, and improves the consistency of substrates.

The invention discloses a method for reducing the peroxide value of phospholipid through reverse phase chromatography, which comprises the following steps: (1) carrying out gradient elution by taking a low-carbon alcohol solution of phospholipid as a sample, adopting a reverse phase silica gel chromatographic column, taking the low-carbon alcohol as a mobile phase A and taking water as a mobile phase B, detecting the wavelength of 250nm, and collecting a low-POV component; and (2) removing the solvent from the low-POV component to obtain the phospholipid product with reduced peroxide value. The method is simple and convenient to operate, can effectively reduce the peroxide value in phospholipid, and is suitable for industrial production.

The utility model relates to the technical field of alarm equipment, in particular to a portable electric shock prevention early warning device for an electrified body. Comprising a device body, a suction cup frame and a mounting assembly, the mounting assembly comprises a guide rod, a spring, a limiting ring, clamping plates, a limiting sliding plate, a locking component and an auxiliary component, during mounting, the locking component is directly loosened firstly, then the clamping plates are pulled to be away from each other, the device body is further placed between the clamping plates, and the clamping plates are loosened; after the external force disappears, the spring is converted from the compressed state to the released state and pushes the clamping plates to abut against the shell of the device body, finally, the locking component is screwed tightly, and when the device is taken down, the clamping plates are directly pulled to be away from each other after the locking component is loosened, and the device body can be loosened. Compared with traditional bolt connection or buckle connection, the installation structure has the advantages that damage to the shell of the device body is smaller, damage to the shell can be reduced when the device body is installed or detached, and the safety of maintenance is improved.

The invention relates to the technical field of soil remediation, in particular to a soil remediation agent for petroleum-contaminated soil and a preparation method of the soil remediation agent, and aims to solve the problem that existing petroleum-contaminated soil is difficult to naturally remedy. According to the preparation method, the polluted soil is repaired by utilizing a bioremediation method, the advantages of high efficiency, good effect and small environmental damage are achieved by adding florae into the polluted soil to remove petroleum hydrocarbon pollutants, the candida tropicalis and the streptococcus faecalis are adopted for composite treatment, the candida tropicalis has the advantages of high permeability resistance, acid resistance and high metabolism efficiency of fungi, and the streptococcus faecalis and the candida tropicalis have the advantages of being high in metabolism efficiency. Streptococcus faecalis can be degraded by the petroleum hydrocarbon, pseudomycelium and spores can be generated, an extended network structure is formed in soil and can be used as a channel for bacterial migration, bacterial migration is facilitated, the treatment effect on pollutants is improved, streptococcus faecalis can grow in the environment with the petroleum hydrocarbon, the degradation effect on the petroleum hydrocarbon is good, and the degradation effect on the petroleum hydrocarbon is good. By compounding the two components, a good biodegradation effect can be achieved.

This invention belongs to the field of acyclic compound technology, specifically relating to a method for preparing tert-butyl peroxide. An alkaline solution is added to acetic anhydride, and the mixture is stirred to obtain a reaction solution. A composite catalyst is added to a purified tert-butyl hydrogen peroxide solution, and the mixture is stirred to obtain a mixture. The reaction solution is added to the mixture, and the mixture is stirred to obtain an organic phase. The organic phase is acid-washed to obtain an oil phase. The oil phase is then alkali-washed, salt-washed, and freeze-dried to obtain tert-butyl peroxide. This invention purifies the tert-butyl hydrogen peroxide solution, effectively removing di-tert-butyl peroxide impurities. A composite catalyst composed of p-toluenesulfonic acid, perfluorosulfonic acid resin, and sulfonated carbon is used as the catalyst, reducing the destructive effect on the product tert-butyl peroxide and significantly improving the yield of tert-butyl peroxide, thus possessing industrial production significance.

The application discloses a process method of sand blasting before machining for high-quality and high-efficiency machining of hard and brittle materials, and belongs to the technical field of precision machining of hard and brittle materials. In view of the problems of easy edge collapse, cracks and low machining efficiency of hard and brittle materials in cutting, sand blasting treatment is performed on the surface to be machined of a workpiece before mechanical cutting machining, a uniform micro-crack damage layer is formed in a controllable manner on the material surface layer by using the impact of high-speed abrasive particles, and the bonding strength of the surface layer is weakened; subsequent cutting machining is then performed, so that the material is mainly removed in brittleness and secondarily removed in ductility, the cutting force and tool wear are significantly reduced, defects such as edge collapse and cracks are inhibited, and the machining surface quality and machining efficiency are improved. The process is simple and has strong adaptability, and can be widely applied to the precision and high-efficiency cutting machining scenes of various hard and brittle materials such as ceramics, monocrystalline silicon and sapphire.