3results about How to "Meet actual application needs" patented technology

This invention discloses a high-temperature corrosion resistance testing device for processing polycarbonate film, belonging to the field of new material testing technology. It includes a testing chamber with a storage tank for storing corrosive liquid installed on its upper surface. A partition is fixed inside the testing chamber, and a motor is fixed inside the testing chamber below the partition. This high-temperature corrosion resistance testing device for processing polycarbonate film utilizes a movable frame and a shielding plate in its testing mechanism. The movable plate moves up and down, driving a lever to engage with an inclined block, achieving a 30° rotation of the shielding plate. During corrosive liquid spraying, the shielding plate blocks the heating tube, preventing contact between the corrosive liquid and the heating tube from damage or surface scaling that could affect heating efficiency. When the corrosive liquid spraying stops, the shielding plate blocks the atomizing nozzle, preventing residual corrosive liquid from drying and crystallizing at the nozzle tip, thus effectively protecting the heating tube and atomizing nozzle and ensuring long-term stable operation of the device.

The application discloses a composite sweetener and a preparation method thereof. The composite sweetener comprises a first sweetener and a chimeric substance. The first sweetener is a polyhedral crystal structure composed of a plurality of solid crystal particles. The solid crystal particles have a crystal lattice structure composed of a plurality of lattices. The chimeric substance is in a molecular form and is embedded in the interlattice gap or the surface of the crystal lattice. The preparation method comprises the following steps: S1. dissolving the chimeric substance in water to form a chimeric substance aqueous solution; S2. mixing the chimeric substance aqueous solution with the first sweetener crystal to partially dissolve the crystal surface of the first sweetener to form a wet crystal; S3. performing post-treatment on the wet crystal to make the first sweetener crystal surface re-grow, and the chimeric substance is in a molecular form and is embedded in the crystal lattice of the first sweetener; and S4. dispersing to obtain the composite sweetener. The chimeric substance is embedded on the crystal lattice of the first sweetener in a molecular form in the process of dissolving the crystal surface of the first sweetener to crystallization, and the cost is low, and the method is convenient and practical.

The invention discloses an anti-seepage wall defect evaluation method based on near-field dynamics, and relates to the technical field of anti-seepage engineering safety evaluation. The method comprises the following steps: firstly, establishing a defect-containing diaphragm wall structure model, and defining a mechanical equation, defect boundary conditions and load constraints; dispersing the structure into material points, constructing a key connection relation and deducing a micro-modulus coefficient; then deducing a near-field dynamic power control equation, and setting a key fracture criterion and a damage evolution model; introducing a proportional boundary shape function, converting the power control equation into a matrix form balance equation, and solving a dynamic response; and calculating a damage value, and evaluating the safety performance and the remaining service life of the diaphragm wall in combination with the safety index. The advantages of the near-field dynamics and the proportional boundary finite element method are fused, the evaluation precision and efficiency are considered, and reliable technical support is provided for safety guarantee of the diaphragm wall.