51results about How to "Improve the safety of production operations" patented technology

The invention discloses a non-powered loading shelf, which comprises a first station frame with a sloped top, a push rod, a counterweight, a second station frame, and a movable rod arranged on the first station frame; The weight and the movable rod can change the power distance and the power steering principle by using the pulley block. The push rod, the counterweight and the movable rod are linked together. The movement of the movable rod drives the counterweight, and the movement of the counterweight drives the push rod. , the movement of the push rod is used to load the container, which can automatically transport the container with parts to the required place on the shelf, without manual lifting and loading, and solve the problem of handling when the operator is loading the container The problem of difficult operation of heavy objects eliminates the movement of manual loading containers, reduces operating hours, reduces the labor intensity of operators, improves operating efficiency, reduces production costs, and improves the safety of production operations.

The invention discloses a synthesis method of N-(4 cyano-3-(trifluoromethyl)phenyl)-2-methylepoxypropylene-2-amide, which comprises the following processing steps: S1, combining 4- Dissolve amino-2-trifluoromethylbenzonitrile and catalyst in dichloromethane, add methyl methacrylate, raise the temperature to 10~65°C, and react for 1~10h; S2, after the reaction, cool down and filter to dichloro Methane is dried to obtain N-(4-cyano-3-trifluoromethylphenyl) methacrylamide; S3, N-(4-cyano-3-trifluoromethylphenyl) methacrylamide Add to the solvent, add biphasic catalyst and manganese dioxide, stir for 1~3h; S4, pass through the reaction in the mixed solution for 10~24h, cool down to 20~25°C, filter and dry to obtain N‑(4cyano‑ 3‑(trifluoromethyl)phenyl)‑2‑methylepoxypropylene‑2‑amide; the biphasic catalyst is a cyclic crown ether. The raw materials used in the invention are readily available and cheap, and the reagents and solvents used are conventional industrial specifications, suitable for industrial production, with minimal environmental pollution, low equipment requirements and high operational safety.

The invention discloses a single-point unbalanced protection casting device for an ultra-thin large-size aluminum-containing steel profiled blank and a using method thereof, and belongs to the technical field of near-net shape continuous casting in the iron and steel metallurgy industry. The single-point unbalanced protection casting device comprises a tundish, a stopper rod, an upper nozzle, a seat brick, a lower nozzle, a submerged nozzle and an H-shaped blank crystallizer; the stopper rod is arranged at an outlet of the tundish; the outlet of the tundish is provided with the upper nozzle and is fixed by the seat brick; the lower end of the upper nozzle is connected with the lower nozzle; the lower end of the lower nozzle is connected with the submerged nozzle; and the submerged nozzle is positioned at the center of a triangular area of a lateral flange of the H-shaped blank crystallizer. The single-point unbalanced protection casting device further comprises a hollow blowing sleevearranged between the upper nozzle and the lower nozzle; the upper nozzle, the sleeve and the lower nozzle form a steel flow channel; the sleeve is provided with air inlets; the number of the air inlets is more than one; and the air inlets communicate with steel flow channel. The quality of a special-shaped blank product can be improved, the yield of casting blanks is increased, the competitivenessof the product in the market is improved, and the single-point unbalanced protection casting device has the advantages of reasonable design and easiness in application.

The invention discloses a method for improving safety of ignition paper preparation. The method comprises the following steps: determining the water contents of zirconium powder, barium chloride and potassium chromate, calculating the drying weights of the zirconium powder, the barium chloride and the potassium chromate, and respectively dissolving the barium chloride and the potassium chromate into distilled water so as to obtain a barium chloride solution and a potassium chromate solution; crushing loose asbestos paper into asbestos paper pulp, adding the zirconium powder, uniformly stirringto obtain a mixed solution, sequentially and slowly adding the potassium chromate solution and the barium chloride solution, transferring the mixture into a suction filtration device, standing, and drying to obtain ignition paper. According to the invention, the use safety of the zirconium powder can be effectively ensured, the barium chloride and the potassium chromate are directly used, the pre-treatment of dangerous raw materials is avoided, the contact time of operators and toxic and harmful chemical products is shortened, the production operation safety is improved, the working efficiency of an operator is improved, the energy consumption can be reduced, the preparation working time of each batch of ignition paper is reduced by 24 hours from 68 hours, the electric energy consumptionis reduced from 544 kW * h to 192 kW * h.

The invention discloses a method for preparing tobacco absolute. The following devices are used: an ultrasonic extraction tank (1); a chromatographic column (2); an air compressor (3); a concentration tank (4); ); Condenser (6); Vacuum pump (8); Solvent recovery tank (7); Steps are: 1. tobacco raw material is ultrasonically extracted; 2. purified by chromatography column (2); 3. concentrated; 4. passed by reverse resin column ( 5) purify; 5. decompression removes ethanol, promptly obtains described tobacco absolute. The device of the present invention can efficiently extract and purify tobacco absolute, and the obtained tobacco absolute can be used in cigarettes, electronic cigarettes or heat-not-burn cigarettes to effectively enhance and improve their smoking comfort.