4results about How to "Precision production" patented technology

The utility model relates to the technical field of medical instruments, in particular to a positioning device for assisting reduction and fixing acromioclavicular dislocation, which comprises a base plate, an acromion end positioning plate is arranged at one end of the base plate, and a clavicle end positioning block is arranged at the other end of the base plate. Holes are formed in the acromion end positioning plate, acromion end fixing guide needle sleeves are fixedly connected to the positions corresponding to the holes, a plurality of holes are formed in the base plate, and a first coracoshoulder ligament fixing guide needle sleeve, a second coracoshoulder ligament fixing guide needle sleeve and a clavicle end guide needle fixing sleeve are fixedly connected to the positions corresponding to the holes respectively. The positioning device can achieve accurate positioning, damage to blood vessels, nerve tracts and surrounding tissues below the coracoid process is avoided, and operation bleeding is reduced. Due to the fact that the individualized bone tunnel is established, the position where the belt carrier titanium plate is placed is appropriate, the osteolysis phenomenon is reduced, and meanwhile the risk of coracoid fracture is reduced. According to the operation method adopting the positioning device, the operation difficulty is remarkably reduced, the operation time is shortened, and the learning curve of young physicians is reduced.

This utility model relates to the field of gypsum board production technology and discloses a dustproof cutting device for gypsum board production. It includes a workbench, a gas storage tank fixedly connected to the top center of the workbench, an air pump fixedly connected to the bottom inner wall of the gas storage tank, a hose fixedly connected to the bottom of the air pump, and the outer wall of the hose penetrating and fixedly connected to the top center of the workbench. A valve is fixedly connected through the middle of the outer wall of the hose, and a vortex chamber is fixedly connected through the bottom of the hose. A separation plate is fixedly connected to the rear end of the inner wall of the vortex chamber. In this utility model, the vortex chamber and other components rapidly cool the cutting blade, stabilizing the blade temperature, reducing wear, ensuring blade edge quality, and precisely controlling the cooling capacity. A second motor and other components precisely position and cut the gypsum board, ensuring consistent gypsum board dimensions, reducing the defect rate. The device is simple and efficient to operate, allows for rapid position adjustment, improves production efficiency, and ensures a high pass rate.

This invention relates to the field of prestressed hollow core slab design. Currently, the process design for hollow core slab systems is unclear. This invention proposes a BIM-based prestressed hollow core slab design method, comprising: establishing a BIM model of the framework; providing a prestressed hollow core slab BIM database to the designer; determining the design load values ​​for the spans, the thickness of the prestressed hollow core slabs, and the initial layout direction; determining the slab direction layout and reinforcement for each span; determining the final simply supported layout diagram of the prestressed hollow core slabs and ensuring the accuracy of the layout; determining the locations of water and electricity pipes for the hollow core slabs and the locations of openings below the slab holes; outputting overall project information data reports; generating production processing tables for each production line; outputting the production processing tables to the factory for standardized assembly line production; generating QR codes through input into the production management system; and on-site construction and installation. This method improves production efficiency, achieves seamless integration from design to production and construction, and enables precise construction, demonstrating promising development prospects in the field of prestressed hollow core slab design.

This invention discloses a method for preparing a highly stable sodium aluminate slurry, comprising the following steps: S1: Selecting sodium aluminate slurry for preparation during the Bayer process of alumina production; S2: Filtering the sodium aluminate slurry obtained in S1 to remove suspended solids and precipitates, then placing it in a clean, dry container and cooling it to room temperature as the preparation solution; S3: Subjecting the preparation solution obtained in S2 to caustic alkali N2. K Total alkali N T Analysis and detection of alumina (AO) content, and calculation of R P If R P If the concentration is greater than 0.5, add solid sodium hydroxide and stir continuously until the solid sodium hydroxide is completely dissolved, so that the R of the solution... P The solution is in the range of 0.45-0.5; S4: Add 120-130 g / L of solid tartaric acid to S3, stir thoroughly to dissolve, and let stand to obtain a highly stable sodium aluminate slurry. The sodium aluminate solution prepared by this invention can be stored for more than one year, exhibiting long storage time, high stability, and outstanding technical effects.