4results about How to "High risk factor" patented technology

The utility model relates to the technical field of joule heat high temperature synthesis equipment discloses a rotatable joule heating device, include: the two sides inner wall of heating bin are connected with the clamping piece opposite rotation, and the pivot of one clamping piece is worn out heating bin, reaction pipe is arranged in the heating bin, and the both ends of reaction pipe are respectively clamped on two clamping pieces, and carbonaceous heating carrier is equipped in reaction pipe, and carbonaceous heating carrier is used for under the action of electric current instantaneous heat generation to heat the material in reaction pipe, the output shaft of rotary drive part is equipped with magnetic coupler, and magnetic coupler is connected with the pivot of clamping piece worn out heating bin, is used for driving reaction pipe to rotate through clamping piece, this device can overcome the defect that traditional heater heating rate is low, heating time is long and limit temperature is not high, can help high temperature synthesis material even in the heating test process is heated, and better control synthesis material's collective appearance, prevent the problem that synthesis material appearance is uneven.

The invention discloses a preparation method of teriflunomide and an intermediate thereof in the technical field of medicine preparation. The preparation method comprises the following steps: step 1, mixing and stirring cyanoacetic acid, p-trifluoromethylaniline and an ethyl acetate solvent; 2, putting the mixture into microwave reaction equipment, and carrying out condensation reaction by utilizing the microwave reaction equipment to generate a key intermediate; step 3, after the condensation reaction is finished, carrying out condensation post-treatment, and drying the key intermediate by using microwave reaction equipment to obtain a purified intermediate; and 4, mixing the purified intermediate with acetyl chloride and sodium methoxide in a proper solvent to generate teriflunomide. According to the invention, the biocatalyst is adopted to replace the traditional metal catalyst, the reaction conditions are optimized, the post-treatment steps are simplified, the operation difficulty and cost are reduced, and the environmental pollution is reduced while the yield is improved.

The utility model discloses a self-adaptive fire fighting truck, and relates to the technical field of fire fighting trucks. The cavity dividing mechanism is arranged on the vehicle body and comprises a position adjusting component, a compartment and a cavity adjusting plate, the compartment is fixedly connected to the top of the vehicle body, the cavity adjusting plate is slidably connected into the compartment, the position adjusting component is arranged in the compartment, and the position adjusting component is connected with the cavity adjusting plate; the leveling mechanisms are arranged on the vehicle body at equal intervals, and each leveling mechanism comprises a leveling air cylinder and an angle adjusting positioning disc. According to the self-adaptive fire fighting truck, through the use of the cavity dividing mechanism, the space in the carriage of the fire fighting truck can be correspondingly adjusted, so that the water storage space and the material storage space are correspondingly adjusted, the flexibility in the use process is ensured, and through the use of the leveling mechanism, the two sides of the whole fire fighting truck can be correspondingly supported; and when the terrain is inclined, the vehicle body is prevented from inclining, and the danger coefficient during use is increased.

The invention discloses a glass fiber reinforced lead-acid battery pole plate ventilation structure, and relates to the technical field of energy storage devices, the glass fiber reinforced lead-acid battery pole plate ventilation structure comprises a battery body, the battery body comprises a tank, a positive plate, a negative plate, a partition plate, a terminal and a cover plate, the cover plate is fixedly connected to the top of the tank through a screw, and the cover plate is fixedly connected to the top of the tank through a screw; the positive plate and the negative plate are placed in an inner cavity of the tank, the positive plate and the negative plate are separated by the partition plate, the positive plate and the negative plate are respectively connected with the corresponding terminals, and a ventilation mechanism is arranged at the bottom of the cover plate. Through cooperative use of the ventilation mechanism and the acid adding liquid level limiting mechanism, the gas discharging speed during acid adding of the lead-acid battery can be increased, the acid adding speed and the acid adding liquid level are limited at the same time, the performance of the lead-acid battery is guaranteed, and the service life of the lead-acid battery is prolonged.