7results about How to "Easy to practice" patented technology

The invention relates to the technical field of waste hydrogenation catalyst treatment, and discloses a recovery method of active metal in a waste hydrogenation catalyst, a preparation method of a residual oil hydrogenation catalyst and application of the residual oil hydrogenation catalyst, and the method comprises the following steps: (1) leaching the waste hydrogenation catalyst by using an acid solution to obtain a leachate; (2) the concentration of hydrogen ions in the leachate is adjusted to be 0.05-2 mol / L, then the leachate is in contact with a first extraction agent, washing and reverse extraction are conducted, and a Mo solution is obtained; (3) adjusting the pH value of the first raffinate to 1-2.1, then contacting the first raffinate with a second extraction agent, and then carrying out washing and reverse extraction to obtain an Al solution; and (4) adjusting the pH value of the second raffinate to 2.2-3.5, then contacting the second raffinate with a third extraction agent, and then carrying out washing and reverse extraction to obtain a Ni and / or Co solution. The method can realize hazardous waste resource utilization, and can significantly reduce the production cost of the hydrogenation catalyst.

The utility model discloses a writing board for calligraphy practice, and relates to the technical field of writing boards, the writing board comprises a writing board body, the surface of the writing board body is provided with a placing table, the right side of the writing board body is fixedly provided with an ink grinding table, the surface of the ink grinding table is provided with an ink grinding groove, the upper part of the writing board body is provided with a pleat removing mechanism, and the upper part of the writing board body is provided with a pleat removing mechanism. And a storage mechanism is fixedly mounted on the left side of the writing board body. The fixed block is arranged to be matched with the movable column, so that the connecting plate drives the edge pressing frame to press edges of paper placed on the surface of the placing table, meanwhile, the sliding groove is matched with the smoothing plate and the grip, wrinkles on the surface of the paper are smoothed by the smoothing plate, a writer can conveniently and better practice calligraphy, the practicability of the writing board is improved, and the writing board is worthy of popularization and application. The writing brush storing and taking box is arranged to be matched with the movable roller, the surface of the writing brush storing and taking box is conveniently covered with the cover plate, meanwhile, the inserting groove is matched with the inserting block, the sealing performance of the writing brush storing and taking box is better, and the writing brush storing effect is improved.

The utility model relates to an automobile comfort system fault box with fault setting and diagnosis training functions, which comprises an upper box body and a lower box body, a plurality of measuring terminals are arranged on the surface of the upper box body, a PCB (printed circuit board) is arranged in the lower box body, a plurality of fault setting circuit breakers are arranged on the surface of the PCB, the plurality of fault setting circuit breakers are provided with fuses, and the fuses are connected with the measuring terminals. According to the utility model, the vehicle comfort system can be rapidly connected, the voltage, waveform and resistance of a vehicle circuit can be measured without damaging the original vehicle wiring harness in the teaching process, and fault points can be set and cleared on a control circuit at the same time. Students are helped to complete circuit fault detection and diagnosis training of the automobile comfort system. And during on-site examination, fault points can be randomly set, so that the examination fairness is ensured.

This invention belongs to the field of seismic design technology for railway bridges, and relates to a seismic analysis method for railway bridges using a variable friction coefficient friction pendulum bearing for seismic isolation and vibration reduction. This method is used to determine the design displacement D of the variable friction coefficient friction pendulum bearing; specifically, it includes the following steps: establishing an equivalent period T based on the design parameters of the variable friction coefficient friction pendulum bearing. eff The relationship between the coefficient of friction and the variable friction coefficient; based on the bridge design conditions, the relationship between the equivalent period and the acceleration response spectrum value is established, and S(T) is obtained. eff Determine the damping adjustment coefficient η; equivalent damping ratio ξ; establish support displacement and equivalent period T. eff S(T) eff By considering the relationship between η and η, and combining it with Newton's iteration process, the final support displacement D is determined. This invention saves time by using analytical expressions for calculation, avoiding tedious modeling, long computation times, and convergence issues compared to the finite element model nonlinear time history analysis method. This allows for rapid evaluation of the seismic performance of different support parameters and structural configurations during the scheme design, parameter optimization, and preliminary design stages.

The utility model discloses a medical multifunctional prone position inflatable mattress, which relates to the technical field of medical mattresses and comprises an air cushion bed main body. An air cushion cotton cushion is installed on the upper surface of the air cushion bed body, an air pump is installed on the rear surface of the air cushion bed body, an air bag partition module is installed on the left side of the upper surface of the air pump, a pressure regulator is arranged on the right side of the upper surface of the air pump, and an inflation connector is arranged on the right side surface of the air cushion bed body. Compared with an existing common multifunctional medical prone-position mattress, the medical prone-position multifunctional inflatable mattress has the advantages that the first wedge-shaped air bag and the second wedge-shaped air bag are arranged, so that the medical prone-position multifunctional inflatable mattress is convenient to use; the body position of a patient can be assisted to turn over by 15-30 degrees by independently inflating and pressurizing the wedge-shaped air bag I and the wedge-shaped air bag II, so that the pressure of the whole body of the patient is relieved, the chest distress and suffocation symptoms of the patient are relieved and the constipation incidence rate is reduced on the basis that the traditional position of the patient after the spinal cord and spinal column operation is kept.

The application belongs to the technical field of fertilizers, and particularly relates to an environment-friendly urea slow-release fertilizer and a preparation method thereof. The preparation method of the urea slow-release fertilizer comprises the following steps: S1. Modified sodium-based montmorillonite is added to water, and a modified sodium-based montmorillonite suspension is obtained after ultrasonic dispersion; urea and puhuizi polysaccharide are uniformly mixed and preheated to obtain mixed particles; S2. The modified sodium-based montmorillonite suspension is sprayed on the surface of the mixed particles, and the environment-friendly urea slow-release fertilizer is obtained after drying. The method is simple and easy to operate, and the obtained fertilizer has excellent slow-release performance.