105results about How to "Reduce vacuum time" patented technology

The invention relates to a method for preparing pure-phase gamma-AlON transparent ceramic powder by carbothermal reduction of gamma-Al2O3, and belongs to the field of preparation of transparent ceramic materials. According to the preparation method, nano-alpha-Al2O3 and activated carbon are taken as raw materials; powder is filled in a graphite crucible loosely, wherein an aluminum oxide plate is paved at the bottom of the graphite crucible; an air hole which penetrates through the powder is preformed at the aluminum oxide plate; a graphite cover provided with fine and dense air holes is used for covering the hole; the pure-phase gamma-AlON transparent ceramic powder is prepared by adopting a two-step heating process in a flowing nitrogen environment with a micro positive pressure. By the adoption of the preparation method, the vacuumizing difficulty can be effectively reduced, powder is prevented from scattering in a vacuumizing stage, the time required for discharging adsorbed gas can be greatly shortened, the vacuumizing speed is high, and the preparation efficiency of the gamma-AlON powder is greatly improved; the obtained gamma-AlON powder phase has stable and reliable compositions and can be used for pressure-less sintering preparation of AlON transparent ceramics with high transmittance; the process is simple and is easy to operate, and is suitable for industrial production.

A rapid treatment system for a soft soil foundation comprises a plurality of drainage plates vertically inserted into a soft soil stratum; the drainage plates are connected with a drainage pipe through hand-shaped joints; the drainage pipe is connected into a gas-liquid dispersion tank; a self-controlled drainage pump is arranged in the tank; above the tank, a vacuum-pumping pipeline system is connected with a high-vacuum pump; pressurization pipes are arranged in the soft soil stratum between the drainage plates; and the pressurization pipes are connected with a booster pump. According to the technology and a method adopted by the invention, adverse effects of well resistance and a smearing effect on drainage consolidation can be obviously reduced, blocking of a drainage channel is reduced, a dead zone of a traditional vacuum preloading drainage channel can be eliminated, dependence on sand resources in the traditional technology can be eliminated, vacuum-pumping time is shortened and vacuum-pumping units are reduced, and 100 percent of operation rate is realized; moreover, the drain pipe is recovered, so that power consumption is reduced, engineering cost is reduced, and the construction period is shortened.

The invention discloses a vacuum variable-pressure buffering device for food processing. The device is characterized by comprising a food processing tank, a vacuum pump and a vacuum buffering tank, wherein the food processing tank comprises a tank body and a close cover, to-be-processed food is arranged in the food processing tank, and a cavity is reserved between the to-be-processed food and the close cover; the vacuum buffering tank is a closed tank body and is communicated with the cavity of the food processing tank through a first gas pipeline and communicated with the vacuum pump through a second gas pipeline, the gas transmission paths of the first gas pipeline and the second gas pipeline in the vacuum buffering tank are provided with at least one layer of filter screen, and the bottom of the vacuum buffer tank is provided with a drain valve. The vacuum variable-pressure buffering device disclosed by the invention has the beneficial effect that the filter screen in the vacuum buffering tank is capable of removing the moisture, grease and other impurities entering along the air in vacuumizing so as to protect the vacuum pump and the second gas pipeline. In conclusion, the vacuum variable-pressure buffering device is simple in structure, easy to operate, low in cost and capable of realizing large-scale production.

The invention provides a magnetron sputtering apparatus and process. The magnetron sputtering apparatus comprises a loading/unloading chamber, a reaction chamber and a transmission chamber, wherein the loading/unloading chamber is used for loading and unloading a processed workpiece; an electrostatic chuck for supporting the processed workpiece is arranged in the reaction chamber; a mechanical arm for transmitting the processed workpiece between the loading/unloading chamber and the reaction chamber is arranged in the transmission chamber; an obstruction tray for obstructing the surface of the electrostatic chuck is arranged outside the reaction chamber; when the surface of the electrostatic chuck needs to be obstructed, the obstruction tray is transmitted to a position above the electrostatic chuck through the mechanical arm; and when the surface of the electrostatic chuck does not need to be obstructed, the obstruction tray is transmitted from the position above the electrostatic chuck to the outside of the reaction chamber through the mechanical arm. Thus, the invention reduces the volume of the reaction chamber, simplifies the structure of the magnetron sputtering apparatus and lowers the manufacturing cost of the magnetron sputtering apparatus.

The invention relates to a gypsum type rapid precision casting method for nonferrous metal. The gypsum type rapid precision casting method is characterized by including the steps that a rapid prototype part of a to-be-cast part, a runner rapid prototype part, a riser rapid prototype part and an air channel rapid prototype part are manufactured through a 3D printer and placed in prepared gypsum slurry, and air pipe joint inserts are sleeved with the air channel rapid prototype part; a dried gypsum mold is heated, the rapid prototype part of the part, the runner rapid prototype part, the riser rapid prototype part and the air channel rapid prototype part are burnt out, and then a part cavity, a runner, an air channel and a riser are formed in a gypsum casting mold; the gypsum casting mold is placed in a casting box, the periphery of the gypsum casting mold is filled with dry sand, and a sprue cup is placed in an opening in the upper end of the runner; the gypsum casting mold is fixed through a pressing beam and a rubber pressing block for vibration and compaction, and then the part cavity, the runner, the air channel and the riser are vacuumized; and nonferrous metal casting liquid is poured which vibration is carried out, vibration is stopped after pouring is finished, the gypsum casting mold is taken out, and a needed casting is obtained. The casting quality of the nonferrous metal part can be improved, and the beneficial effects of being easy and convenient to operate and the like are achieved.

The invention provides vacuum welding equipment with an supersonic aging function and an application method of the vacuum welding equipment. The vacuum welding equipment comprises a vacuum device, a welding vacuum chamber, a feeding vacuum chamber, an electron beam welding device, a welding working table, an argon arc welding device, a nitrogen making device, and an supersonic aging device. The welding vacuum chamber and the feeding vacuum chamber are separately provided with a piston sealing plate and a lifting sealing plate. The electron beam welding device is arranged on the piston sealingplate. The welding working table can rotate at 180 degrees and 360 degrees. The argon arc welding device is mounted on the piston sealing plate in a replacing mode. The nitrogen making device can provide liquid nitrogen for a welding gun and a weldment for cooling. The supersonic aging device is arranged on a conveying belt. Continuous production is achieved. The size of the vacuum chamber can beadjusted based on the size of the weldment. Impurities of the weldment can be shaken off before the weldment entering the vacuum chamber. The supersonic aging is adopted to remove welding stress afterwelding. The fatigue life of a welding structure is prolonged. The welding quality is guaranteed.

The invention discloses heterojunction solar cell coating equipment, method and system, a solar cell, an assembly and a power generation system, and belongs to the field of solar cell processing. Theheterojunction solar cell coating equipment is used for depositing a heterojunction solar cell amorphous silicon-based thin film, and comprises a process cavity, wherein the process cavity comprises at least two intrinsic process cavities used for deposition of an intrinsic layer silicon thin film process, and at least one doping process cavity used for deposition of an N-type silicon film or P-type silicon film process, and the cavities in the intrinsic process cavities and the doping process cavity are isolated by isolation valves. By combining the control of gas proportion and pressure, theequipment can process a plurality of solar cells at the same time, so that the overall processing efficiency is greatly improved, and the equipment is suitable for commercial use.

The invention relates to a method for sealing a vacuum glass exhaust tube. The exhaust tube outside a base glass is provided with an induction medium, a gap of 0 to 5 millimeters is reserved between the induction medium and the end face of the base glass, an induction coil is arranged outside the induction medium, the induction coil is connected with a variable frequency induction device and heats the induction medium, and the induction medium finishes sealing the exhaust tube by heating and melting the exhaust tube through radiant heat. By using a variable frequency induction heating mode to heat and seal the exhaust tube, a tail tube of the exhaust tube is parallel to or lower than the base glass, the plain-end tailless sealing of the exhaust tube is realized, the vacuum glass is convenient to transport and mount and has attractive appearance, and the breakage rate is reduced; and the method is suitable for automatic production and operation, solves the unsolved problems up to now at home and abroad, and contributes to the vacuum glass industry.

The invention discloses a preparing method for enhanced breathable insulating materials. alkali-free glass fiber and water drawing glass fiber are as raw materials, the alkali-free glass fiber and water drawing glass fiber are enabled to be mixed, meanwhile, white water is added in, achieved mixed liquor is stirred to be in a suspension dispersed state, then mixed liquor of alkali-free glass fiber and the white water is added in, and pulping is continuously to be done; formed seriflux is enabled to be transported to a multitube seriflux arranging machine through a stainless steel screw pump, the seriflux through the multitube seriflux arranging machine enters a breast box and flows naturally to a forming part to form a wet paper sheet, the wet paper sheet is enabled to be secondary formed through a press roll, then the wet paper sheet achieved through the steps is sent into a natural gas tunnel-type drying oven, and a rough blank is achieved; the dried rough blank is enabled to be parted off and rolled up according to demanded specification, and then the needed enhanced breathable insulating materials are achieved.

The invention relates to a harmless treatment process for sick and dead livestock and poultry. The harmless treatment process comprises the following steps of (1), disinfecting sick and dead livestockand poultry corpses with disinfectants; (2), transporting the disinfected corpses of the sick and dead livestock and poultry to a crusher for crushing, and crushing the corpses into 5 cm meat pieces;(3), spraying the disinfectants on the surfaces of the meat pieces, and pumping the meat pieces into a rendering pot for rendering; and (4), after separating oil and fat, transferring materials intoa reactor, adding medicines into the reactor, stirring uniformly, standing, discharging the upper layer of clean water into a sewage treatment tank, transferring the lower layer of the materials to afilter press for filter pressing, and drying filter cakes to obtain meat and bone meal. The harmless treatment process for the sick and dead livestock and poultry has the advantages of simple operation, low energy consumption, low production cost, low water content of the meat and bone meal and the like, and the quality of raw sewage water is stable.

The invention discloses a low-temperature gas cylinder vacuuming system comprising a furnace body, a plurality of gas cylinder to be pumped arranged in the inner cavity of the furnace, and a vacuuming set communicating with the gas cylinders to be pumped. The vacuuming set is connected with a main pipe. A plurality of primary branch pipes are arranged on the main pipe. A plurality of secondary branch pipes are arranged on the primary branch pipes. The secondary branch pipes are corrugated pipes and are connected with the vacuuming ports of the gas cylinder to be pumped. The low-temperature gas cylinder vacuuming system provided by the invention has the advantages of high efficiency and good vacuuming effect.

The invention provides a method for obtaining ultrahigh vacuum in the vacuum electron beam welding of niobium materials, which includes the following steps: niobium workpieces and sacrificial metal are put into a welding vacuum room; the welding vacuum room is vacuumized by a vacuum system of a vacuum electron beam welding machine until ultimate vacuum is reached; the electron beam of the vacuum electron beam welding machine is used for bombarding the sacrificial metal, so that a weld crater is formed in the electron beam spot area of the surface of the heated sacrificial metal; and within ten minutes, the electron beam is started to weld the niobium workpieces within the shortest time. The method can be adopted to provide a higher vacuum environment for the welding of niobium materials, so that the welding of niobium materials can sufficiently avoid the pollution of oxygen, nitrogen and other gaseous impurities, and thereby better niobium material-welding purity can be obtained.

The invention discloses a multi-chamber continuous optical coating machine. The multi-chamber continuous optical coating machine comprises an operating mechanism, at least one transfer part, at leastone front chamber and at least one coating chamber. A plating part is arranged on a workpiece rotating rack, the transfer part is joined to the front chamber, the front chamber is joined to the coating chamber, the transfer part, the front chamber and the coating chamber form a coating channel of the plating part, the front chamber and the coating chamber are provided with vacuum equipment independently, the front chamber and the coating chamber are independent sealing cavities, and the workpiece rotating rack rotates in the coating chamber through the operating mechanism. The invention provides the multi-chamber continuous optical coating machine which improves the coating efficiency and saves the energy sources, and the coated plating part is uniform in film thickness.

The invention relates to a method for vacuumizing a semiconductor process thin film deposition cavity, which comprises the following steps of: providing a semiconductor process thin film deposition cavity, carrying out air exhaust on the semiconductor process thin film deposition cavity by using a low vacuum pump, carrying out second stage air exhaust by using a high vacuum pump to adjust a baffle plate to block a wafer, heating an air absorbing material in a crucible by using a heater to generate steam used for capturing residual gas in the cavity to form a compound, deposing the compound on the baffle plate until reaching the target vacuum degree, stopping heating the air absorbing material, and opening the adjustable baffle plate for carrying out the next procedure.

Provided is a method for preparing ethanol in high efficiency. The ethanol preparation method includes a step of yielding a saccharide water solution through saccharification of cellulose with an enzyme in water, a step of condensing the saccharide water solution, and a step of yielding an ethanol water solution by fermenting the saccharide in the condensed saccharide water solution into ethanol, wherein the step of condensing the saccharide water solution is performed through a pervaporation treatment on the saccharide water solution by using a water separation membrane composed of polypyrrole doped with a sulfonate ion.

A split magnesium-lithium alloy vacuum smelting furnace comprises a primary material feeding furnace. The primary material feeding furnace is communicated with a material feeding mechanism through a vacuum electromagnetic valve, the material feeding mechanism is further communicated with a secondary smelting furnace, the secondary smelting furnace is communicated with a tertiary casting furnace through a second electromagnetic valve, and one side of the secondary smelting furnace is further connected with a vacuumizing device. After the vacuumizing device vacuumizes the primary material feeding furnace, the secondary smelting furnace and the tertiary casting furnace, the primary material feeding furnace and a secondary smelting furnace cavity are disconnected through the vacuum electromagnetic valve, the secondary smelting furnace cavity and a tertiary casting furnace cavity are disconnected through the second electromagnetic valve, vacuum degree in a primary material feeding furnace cavity, the secondary smelting furnace cavity and the tertiary casting furnace cavity is respectively kept, and material loading, smelting and casting processes are respectively finished in the primary material feeding furnace, the secondary smelting furnace and the tertiary casting furnace. The split magnesium-lithium alloy vacuum smelting furnace has the advantages of being high in vacuumizing efficiency and production efficiency and achieving large-scale production.