5results about How to "Solve the problem of adding" patented technology

This invention discloses a retractable multi-material 3D printing head, which includes an extrusion structure, a first feeding structure, a second feeding structure, and a third feeding structure. By connecting the three feeding structures with one extrusion structure, the extrusion retraction problem in 3D printing of multiple materials is solved. The extrusion structure has three meshing screws, resulting in high mixing efficiency during slurry mixing. Simultaneously, each of the three feeding structures has a screw, allowing for better control of the amount of high-viscosity material added to the extrusion structure. Furthermore, the three screws inside the extrusion structure are specially designed irregular-shaped screws. While achieving conventional mixing, they not only better control the material extrusion amount but also work together with the screws in the feeding structures to achieve slurry retraction when printing high-viscosity materials, improving the forming effect and allowing for a wider solid content range in the formed ceramic slurry.

The application belongs to the technical field of agriculture, and particularly relates to a selenium-rich and cadmium-reducing fertilization method based on root-leaf cooperation and application thereof. The fertilization method comprises the following steps: before flower bud stage, burying soil conditioner; during spring shoot stage and / or flower bud stage, fruit bulking stage and color changing stage, spraying selenium-rich foliar fertilizer; by combining the specific soil conditioner and the selenium-rich foliar fertilizer, the root-leaf cooperation solves the problems of soil acidification and selenium element addition in the process of fruit tree planting, improves fruit quality, increases organic selenium content, and improves total flavonoid content in the fruit. The fertilization method is particularly suitable for the planting of citrus, grapefruit and other fruit trees.

The utility model discloses a fluid infusion measuring tank matched with a cell culture bag, which belongs to the technical field of experimental equipment and comprises a measuring tank body and a culture bag connector, an extension tube is arranged in the middle of the top of the measuring tank body, a first connecting tube is arranged on the side of the extension tube, an air tube is connected onto the first connecting tube, and a second connecting tube is connected onto the air tube. An inflation air bag is arranged at the end of the air pipe, a connecting pipe opening is formed in the top of the extension pipe, a tank cap is arranged on the connecting pipe opening, a guide bottom plate is arranged on the inner wall, close to the bottom, of the measuring tank body, and a control valve pipe is arranged at the bottom of the middle of the guide bottom plate; an adjusting rod is arranged between a valve switch of the control valve pipe and the measuring tank body, and a second connecting pipe is arranged between the bottom of the control valve pipe and the culture bag connector piece. Through cooperative use of the inflatable air bag, the control valve tube and other components, the supplementing speed of the nutrition materials can be conveniently controlled, and supplementing and adding work is facilitated.

The utility model relates to the technical field of oil displacement engineering processes, in particular to an oil displacement agent synthesis reaction device which comprises a main body reaction unit, an auxiliary strengthening unit, an energy management unit and an integrated control unit. The main body reaction unit comprises a reaction kettle and a stirring shaft, a kettle cover is mounted at the top of the reaction kettle, and the stirring shaft is vertically mounted in the reaction kettle; three feed ports are formed in the top of the reaction kettle, and a discharge port is formed in the bottom of the reaction kettle; the auxiliary strengthening unit comprises a vacuum pump, a vacuum tank, an air compressor, a gas storage tank, a circulating pipe and a circulating pump. The energy management unit comprises a heating medium storage box, a refrigerant storage box, a temperature sensor A and the like. The main body reaction unit can utilize a stirring shaft under the conditions of constant temperature and constant pressure, and simultaneously assists a vacuum system and a circulating sprayer and an energy control unit in an intensifying system to realize synthesis of the oil-displacing agent and active functional group addition and modification reaction, so that exploration of an oil-displacing agent synthesis process is completed, and a high-performance oil-displacing preparation product is obtained.

The utility model discloses a powder supply device of a powder forming machine, which comprises a worktable, a controller is mounted on the surface of the worktable, a lower die is fixedly connected to the top of the worktable, a feeding hole is formed in one side of the inner wall of the lower die, a feeding frame is fixedly communicated with the outer part of the lower die, and a feeding hole is formed in the feeding frame. The top of the feeding frame fixedly communicates with a hopper, a first hollow ring is fixedly connected to the interior of the hopper, a first pressure sensor is installed in the first hollow ring, and a first shielding assembly is arranged outside the hopper. Through cooperative use of the controller, the first pressure sensor, the second shielding assembly, the material storage box, the feeding pipe and other structures, whether the weight of powder in the hopper is qualified or not can be detected, and the powder can be automatically added into the hopper when the weight of the powder is unqualified; the problem that powder can be added only when a worker shuts down the powder forming machine is solved, and the working efficiency of the powder forming machine is improved.