31results about How to "Break through the size limit" patented technology

The present invention relates to a preparation method for Sm-Co binary alloy amorphous block body material, and belongs to the powder metallurgy technology field. Because the majority of the binary alloy phase have positive formation enthalpy, the production of amorphous alloy powder with the mechanical alloying method is extremely difficult. The present invention has the steps that pure metals Sm and Co are proportioned and blended according to single phase alloy, and single phase Sm-Co alloy cast ingot is produced by smelting with a vacuum induction furnace; the Sm-Co alloy cast ingot is crushed to be powder grains of below 200 micron, the powder grains are charged into a mill pot with a ball / powder weight ratio of 15:1 to20:1, and after ball milling for eight to twelve hours, the complete amorphous alloy powder can be obtained; under the argon shield, the amorphous alloy powder is charged into a hard alloy die for cold press moulding, is delivered into electric discharge plasma sintering equipment for sintering and densification: the final state sintering temperature is 300-400 DEG C, the temperature rise rate is 80-120 DEG C / min, the sintering pressure is 500 MPa-1 GPa, and heat is not reserved at the final state sintering temperature. The present invention is not limited by the positive formation enthalpy of the binary alloy, and the Sm-Co alloy amorphous block body material has high density and high structural stability.

The invention relates to a sheet-like hydrogel material and a preparation method thereof, wherein the sheet-like hydrogel material is composed of the following raw materials according to the percentage of the total weight of the raw materials: polyvinyl alcohol accounts for 4-18%, polyethylene Pyrrolidone accounts for 0-12%, polyethylene oxide accounts for 0-2%, sodium alginate accounts for 0-3%, chitosan accounts for 0-0.5%, xanthan gum accounts for 0-1.5%, sodium polyacrylate accounts for 0-1.5% %, water accounts for 69.99‑93.5%. The preparation method of the sheet-shaped hydrogel material is as follows: heat up the raw material and stir it into a transparent and viscous solution, take it out and cool it down and apply it between two layers of release film, preform it in low temperature refrigeration, form it by electron accelerator radiation, cut it and packed into packages, sterilized by radiation to obtain the sheet-shaped hydrogel material. The hydrogel sheet prepared by this method has high water content, biocompatibility and safety, and the thickness uniformity of the sheet is greatly improved compared with the current technology; the preparation method is simple and easy, and the production efficiency High, low production energy consumption, and can be applied to large-scale production of hydrogel sheets.

The invention discloses a laser additive manufacturing equipment and method for metal parts. The equipment includes working cabin, pre-set powder spreading rapid prototyping components, conformal cylinder setting and removal components, machining components, moving mechanism and control system. First, use the conformal cylinder setting and removal component to set a conformal cylinder slice layer on the surface of the substrate that can surround the metal part slice contour, and the preset powder spreading rapid prototyping component lays a layer of metal powder inside it, and the powder Carry out laser selective melting to complete the forming of the first slice layer of metal parts; according to the precision requirements, mechanical processing components can be used to machine the formed slice layer of the part; Layer laser selective melting forming-machining (when necessary)" process, which can realize high-precision forming of metal parts of various sizes and structures at one time; shaped cylinder.

The invention discloses a boron-doped stress bar for manufacturing a polarization-preserving fiber and a manufacturing method for the boron-doped stress bar. The manufacturing method comprises the following steps of: A10, depositing a boron doping area on the inner wall of a quartz liner tube by using a plasma chemistry vapor deposition (PCVD) process to obtain a prefabricated member, namely introducing mixed gas into one end of the quartz liner tube, and discharging the mixed gas through the other end of the quartz liner tube, wherein the mixed gas comprises silicon tetrachloride vapor with the flow of 700-1,900sccm, high-purity oxygen with the flow of 1,600-5,000sccm and boron chloride with the flow of 70-1,100sccm; and A20, performing high temperature collapsar on the deposited prefabricated member into a solid boron-doped stress bar. BCl3 and SiCl4 are used as raw materials, the boron doping area is deposited at high speed and high efficiency by the PCVD process, and the utilization rate of the raw materials and the doping concentration are improved; and moreover, gradient doping is adopted, so that the problem that the boron stress bar is easily broken and twisted in the processing can be solved, the geometric symmetry of the doping area is improved, the probability of panda eye and cladding breakage in the cutting is reduced, and the welding efficiency of the fiber is improved.

The invention relates to a packaging structure and method of an optical fiber Fab sensor used for temperature measurement of nuclear facilities, and belongs to the technical field of optical fiber sensing. The structure includes single-mode optical fiber, heat insulating guide post, flange base, capillary steel pipe, stainless steel armored tube and optical fiber Fab sensor; the method is: make an optical fiber Fab sensor at the top of the single-mode optical fiber; into a capillary steel tube sealed at one end, and bonded and fixed with high-temperature-resistant adhesive; penetrate the capillary steel tube into a stainless steel armored tube with an inner diameter of 0.5 mm, so that the sensing part is exposed about 2 to 3 mm outside the tube; The stainless steel armored tube is installed into the flange base from both ends; the joints between the capillary steel tube and the stainless steel armored tube, and the stainless steel armored tube and the base are welded and sealed; the sensor is annealed as a whole. The invention breaks through the size limitation of the thermocouple sensor on the packaging structure, and provides a sensing method with high-speed temperature response for temperature measurement of nuclear facilities.

The invention discloses an upward suspension type underground oil-water separation pipe column. The pipe column comprises a perforated pipe, an inserted seal, a filling pump system and an oil-water separator which are connected from bottom to top through an oil pipe. The pipe column also comprises a separation joint, wherein the separation joint is connected with the oil-water separator and is ofa three-way structure, the upper end of the separation joint is provided with two ports, the first port is connected with a lifting oil pipe, the second port is connected with an oil return oil pipe,a lower port is connected with an outlet of the oil-water separator, and an upward suspension type structure is formed. Three channels are formed in the pipe column and include the channel for outputliquid of an output liquid layer to enter the oil-water separator, the re-injection channel used after test modification of separated low-oil-content output water and the oil-rich output liquid lifting channel. The pipe column has the advantages that the separated lifting channel is connected with the re-injection channel, so that the problems that a conventional suspension type underwater oil-water separation structure electric pump liquid output channel is connected with the re-injection channel in parallel, the size of a casing pipe is limited and re-injected test modification is difficultare solved; large-displacement underground oil-water separation and re-injected water monitoring are achieved.