6results about How to "Round shape" patented technology

This disclosure relates to a fuselage shell of a drone and the drone itself. The fuselage shell includes a housing for enclosing a space for accommodating internal components of the drone. The housing includes a bottom wall and a front end wall, a transition wall, and a main body wall sequentially disposed on the bottom wall from front to back along the drone's longitudinal direction. The orthographic projection area of ​​the front end wall along the longitudinal direction is a first projection area. The orthographic projection area of ​​the area enclosed by a first connecting line at the junction of the transition wall and the main body wall and the bottom wall along the longitudinal direction is a second projection area. The first projection area is completely located within the second projection area. The transition wall is a continuous, smooth curved surface extending rearward from the front end wall. This technical solution optimizes the shape of the housing, making it more rounded, suitable for guiding airflow during flight, reducing fuselage drag, and increasing the drone's range.

The invention relates to an aluminum alloy soldering lug and a preparation method and application thereof, and belongs to the technical field of welding. The aluminum alloy soldering lug disclosed by the invention is prepared from the following elements in percentage by mass: 3.0 percent to 4.5 percent of Si, 2.0 percent to 3.5 percent of Fe, 0.8 percent to 1.2 percent of Mg, 0.10 percent to 0.25 percent of Zr, 0.05 percent to 0.15 percent of Sc, 0.02 percent to 0.08 percent of Er, 0.05 percent to 0.12 percent of Ti, 0.005 percent to 0.02 percent of B and the balance of Al and other inevitable impurities. The mass ratio of (Zr + Sc) / Fe is 0.08 to 0.15; the mass ratio of Mg to Si is 0.25 to 0.35; the mass ratio of (Fe + Si) to (Zr + Sc + Er) is 20-25; the problems that laser welding aluminum alloy is thick in weld joint structure and uneven in performance, and a dissimilar material welding interface is embrittled are fundamentally solved.

The utility model discloses a tapioca flour ball machine for processing horseshoe popping beads, and relates to the technical field of food processing, the tapioca flour ball machine for processing horseshoe popping beads comprises a processing box, the left side of the top end of the processing box is fixedly connected with a base, and the tapioca flour ball machine for processing horseshoe popping beads is provided with a spiral channel, a second vibrator and an arc plate. Firstly, tapioca flour is poured into a vibrating disc, then cleaned diced water chestnuts are poured into the vibrating disc, a first vibrator and a second vibrator are started, the diced water chestnuts shake in the vibrating disc through vibration of the first vibrator to be gradually wrapped with flour and become round, and finally the diced water chestnuts are discharged into a processing box through a discharging port. When the water chestnut dices pass through the spiral channel, the contact area of the water chestnut dices and the solution is increased, then the water chestnut dices fall into the filter screen again, bubbles generated after mixing are removed, finally, the water chestnut dices sequentially drop into the soaking box through the dropper, seaweed gel on the outer portion reacts with calcium lactate, the peripheries of the water chestnut dices are solidified into balls, and the problem that the device cannot conduct automatic powder wrapping processing is solved.

This invention relates to the field of lyophilized formulation technology and discloses a method for preparing controllable molecular weight silk fibroin lyophilized spheres, comprising the following steps: preparing a mixture of a lyophilization protectant, a protein conformation stabilizer, and silk fibroin solutions of different molecular weights. The lyophilization protectant includes sugars and sugar alcohols, and the protein conformation stabilizer is a polyol. After pre-freezing the mixture into spheres, a surface coating modification is performed by adding an ethanol solution containing cellulose, followed by a second pre-freezing in liquid nitrogen, and finally, the lyophilized product is controlled by a specific program in a vacuum freeze dryer. This invention employs specific lyophilization protectants, protein conformation stabilizers, surface coating modification techniques, and freeze-drying techniques, enabling the prepared silk fibroin lyophilized spheres to have a better appearance and improving their resistance to moisture absorption and shrinkage, as well as their rapid reconstitution.

According to the machine head structure for rolling the wrappers, the conical rollers are consistent in height and can be synchronously controlled, and the shapes and the thicknesses of the wrappers are relatively uniform; the top of the rotating assembly is connected with a power mechanism, a main rotating plate is arranged at the bottom of the rotating assembly, a main rotating gear is fixedly arranged in the middle of the rotating assembly and is a bevel gear, a plurality of bearing fixing plates are distributed and fixed to the main rotating plate in a circumferential array mode, and the bevel gear is rotationally arranged on the upper side of each bearing fixing plate. The lower side of each bearing fixing plate and the corresponding bevel gear are coaxially and rotationally provided with a first straight gear, the main rotating gear is meshed with the corresponding bevel gear, a second straight gear is rotationally arranged on the lower side of each bearing fixing plate and meshed with the corresponding first straight gear, and a conical roller is coaxially and fixedly arranged at the lower end of each second straight gear. The large ends of the conical rollers face the second straight gear, the small ends of the conical rollers face the rotating center of the rotating assembly, and the conical surfaces of the multiple conical rollers can be tangent to the horizontal plane at the same time. The wrapper rolling machine can be widely applied to the field of wrapper rolling machines.

The invention belongs to the technical field of exosome processing, and discloses an exosome microvesicle lossless separation and purification device which comprises a sealed separation box, a central shaft assembly and a microvesicle separation device, the inner cavity of the sealed separation box is internally provided with a lamination assembly, the lamination assembly is arranged on the outer side of the central shaft assembly in a sleeving mode, and the top end of the lamination assembly is provided with a pressing disc in a matched mode; and a synchronous driving assembly. According to the invention, in a compression state, the micro-nano groove forms an accurate nanoscale channel for interception and filtration, and in a relaxed state, along with release of axial pressure, the elastic sheet rapidly rebounds, and the section geometric shape of the micro-nano groove deforms, such periodic geometric deformation destroys the mechanical stability of a filter cake layer from a physical level; according to the device, the clamping force is applied to the surface of the groove, so that particles which are originally clamped in the groove or adsorbed on the surface instantly lose the clamping force and automatically fall off along with the shearing action of surface fluid, the flux attenuation rate is controlled to be a small value when the device runs for a long time, and continuous and stable filtering in the true sense is achieved.