17 results about "Vacuum pumping" patented technology

The invention discloses a hole drilling and edge cutting dual-purpose machine. A portal frame is fixed to a rack, a work table is installed on the rack in a sliding mode, a hole drilling and edge cutting dual-purpose mechanism is provided with an integrally-cast integral shell, a rear cover and a hole drilling and edge cutting component, at least one bag male mold is installed on the work table, vacuum absorption holes are formed in the position, corresponding to the hole drilling position of the bag, of the bag male mold, and the vacuum absorption hole is connected with a vacuum-pumping device and /or a dust collecting device. According to the hole drilling and edge cutting dual-purpose machine, one machine achieves two purposes, the machining efficiency is improved, the energy consumption is reduced, the shell of the hole drilling and edge cutting component selects and uses the integral shell, the component number is reduced, and the structural strength, the operation stability and the machining precision are improved.

The invention provides an efficient defoaming solvent-free composite mixing unit cylinder which comprises a cylinder body. The bottom of the cylinder body is communicated with a discharge port. A cylinder cover is installed at the upper end of the cylinder body. A motor base is installed at a spindle hole of the cylinder cover. The motor base is provided with a stirring motor. The cylinder cover is also communicated with a vacuum tube and a feed pipe. A transmission shaft of the stirring motor extends downwards into the cylinder body. The transmission shaft is in transmission connection with a stir rod through a coupling. Screw vanes are arranged on the circumferential surface of the stir rod. A material pumping sleeve sleeves the periphery of the screw vanes of the stir rod. A lower end socket of the stir rod, which extends downwards out of the material pumping sleeve, is fixedly provided with stirring vanes. An umbrella-shaped body is arranged on the outer wall of the upper part of the material pumping sleeve, and the wall of the material pumping sleeve above the umbrella-shaped body is provided with a material discharging opening. According to the unit, a feed liquid is stirred with the stirring vanes in cooperation with vacuum-pumping for defoaming, and the feed liquid at the bottom of the cylinder is pumped by the use of the screw vanes and then transmitted onto the umbrella-shaped body through the material discharging opening to form a thin film, so as to realize rapid defoaming.

The vacuum duct anti-plugging device of vacuum cleaning furnace contains a vacuum shell body, the vacuum shell body is connected with one end of vacuum tube, in the vacuum shell body inner cavity a heater and a filter plate are mounted, on the filter plate several small holes are set, on the vacuum shell body an air-intake valve is also mounted. Said invention also provides a vacuum-pumping device of vacuum cleaning furnace. Said device contains all the technical characteristics of the above-mentioned vacuum duct anti-plugging device, and said device contains the following components: water-spraying cleaning device, water ring-type vacuum pump and gas-water separate. Said invention also provides the connection mode of them, and also provides its working principle.

The present invention belongs to the technical field of food processing and more particularly relates to a preparation method of fruit and vegetable crisp slices. The preparation method comprises the following steps: (1) materials are selected, the selected materials are washed, and the washed fruits and vegetables are cut into thin slices or long strips according to processing characteristics; (2) the fruit and vegetable thin slices or long strips are cooled step by step and the cooled fruits and vegetables are drained for a standby application; (3) the central temperature of the obtained fruits and vegetables is reduced to -18 to -20 DEG C in 15 min; (4) cooled fruits and vegetables are soaked in a maltose dilution for 12 hours, the soaked fruits and vegetables are placed in a vacuum oil-frying device, a vacuum pumping is conducted, nitrogen is filled, and then palm oil is heated to be 85-88 DEG C; and (5) the fruits and vegetables are transferred away from oil surface, the vacuum pumping continues, the oil removing treatment is kept, the materials are discharged, and then the fruits and vegetables are seasoned to obtain fruit and vegetable crisp slices. The obtained crisp slice products are crisp in mouthfeel, the preparation method keeps purely natural color and luster, nutrition and flavor of the fresh fruits and vegetables, the products are free of greasy feeling, and the preparation method does not produce carcinogens of 3-4 benzoapyrene, acrylamide, etc.

The invention discloses a tubular film evaporator for polyester production, comprising a shell which is provided with a feed inlet and a vacuum extract opening at the top. A feed outlet is arranged at the bottom of the shell. At least a group of evaporation units is arranged below the feed inlet inside the shell, and each group of evaporation units comprises a material receiving funnel and a heat exchange tube. The heat exchange tube is arranged perpendicularly and inserted in the circular hole at the bottom of the material receiving funnel. A circular gap is retained between the periphery of the heat exchange tube and the material receiving funnel. During polyester production, materials flows downwards from the circular gap retained between the periphery of the heat exchange tube and flows downwards in a film shape along the surface of the heat exchange tube and meanwhile, heat exchange occurs between the materials and the heat exchange tube, and the byproducts generated by the reaction overflow continuously and are extracted by a vacuum pump. Because the materials are distributed outside the heat exchange tube, the problem of blockage is solved. The tubular film evaporator has the advantages of good film forming effect, reliable use and high work efficiency and can be used in production of polymers of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylece terephthalate (PBT), PTT and the like.

The invention provides a method for welding a magnesium target material and a copper back plate, and aims at solving the problems that in the prior art, the target is welded by hot isostatic pressing,electron beams, ion welding and other methods, the target is easy to deform, the grain size of the target is easy to abnormally grow, and the cost is not easy to control. In order to reduce the costand ensure the welding strength required by sputtering, innovation can be conducted on traditional welding. The starting point of the invention is to reduce cost and prevent the oxidation of a magnesium target. The method for welding the magnesium target material and the copper back plate comprises the steps of treating the welding faces of the magnesium target and the back plate; and placing themagnesium target, the back plate and a brazing filler metal block in an argon atmosphere platform, and conducting brazing, wherein the brazing temperature is slightly higher than the melting point ofthe brazing filler metal. The platform has the functions of vacuum pumping and on-line operation, so that the manufacturing cost is greatly reduced; and the components of the brazing filler metal areimproved, so that the welding bonding strength can be improved, and the welding strength implemented through the method provided by the invention can reach 50 Mpa or above.

The invention discloses brazing filler metal for brazing of stainless steel and a preparation method of the brazing filler metal. The brazing filler metal comprises, by weight, 33-37% of Fe, 8-12% of Si, 10-25% of Mn and the balance Ni. The preparation method comprises the steps that the components are weighed according to the formula, then the components are placed into a vacuum arc furnace, vacuum pumping is conducted, and argon is fed into the vacuum arc furnace to conduct uniform smelting. Compared with the prior art, the brazing filler metal has the advantages that the melting point is low, wettability and jointing performance are good, and joint strength of the stainless steel brazed with the brazing filler metal is high.

The invention belongs to the technical field of testing moving parts such as a membrane and the like, and more particularly discloses a multifunctional membrane testing device which comprises a test bench component, an electric control cabinet component and a pneumatic component; wherein, the electric control cabinet component comprises a power supply, a programmable controller (PLC) connected with the power supply and two intermittent on-off selective control valves which are respectively and correspondingly connected on two pins of the PLC; the pneumatic component comprises a high pressure air source, a moisture separator and two airflow branches formed by respectively connecting the moisture separator with the two selective control valves, wherein, one of the airflow branches is communicated with a positive pressure gas discharge pipe, and the other one is connected with a negative pressure generator and a negative pressure gas discharge pipe and communicated with the parts to be tested, so that negative pressure is formed for testing the parts to be tested by vacuum-pumping. The testing device can accurately control the negative pressure applied on the objects to be tested, meet the strain resistance and corrosion resistance tests of dynamic and static rubber mebranes, and accurately control the frequency, time and count of the movement of the mebrane without needing a person specially assigned for monitoring, thereby improving the working efficiency of the test and greatly reducing the energy consumption.

The invention provides sports outdoor clothing fabric for the mass. The sports outdoor clothing fabric is prepared by the following method: S1, selecting low-elasticity interlaced yarns as warp yarnsand selecting polyester fibers with specially-shaped sections as weft yarns to weave polyester fabric; S2, washing and drying the polyester fabric; S3, soaking the polyester fabric into a diphenyl ketone-acetone solution, and shading and airing; S4, soaking the polyester fabric attached with benzophenone on surface into an acrylamide aqueous solution, and placing into an irradiation reactor to perform vacuum-pumping; S5, turning on a lamp to irradiate to obtain modified fabric; S6, putting the modified fabric into an acetone solution, and cleaning and drying; S7, soaking the dried fabric intodeionized water, sufficiently wetting, dropwise adding epoxy resin to react, and washing and drying; and S8, soaking the fabric into deionized water, adding collagen powder, and continuously reactingand drying. The fabric has gas permeability, moisture penetrability and wet permeability which are superior to that of cotton woven fabrics with similar specifications.

The invention discloses a core heat setting process method comprising the steps: step one, placing a capacitor core in a first baking box, performing vacuum pumping in the first baking box and keepingthe vacuum pressure in the box at 4-7 mbar. According to the core heat setting process method, the capacitor core is placed in the first baking box and 4-7 mbar vacuum pumping treatment is performed.The core cutting layer is examined by the microscope, the number of hollows on the cross section is 3-7/mm and the size of the hollow point is phi0.1-0.6 mm. Compared with the conventional heat setting process that the number of the hollows on the cross section is 15-23/mm and the size of the hollow point is 0.8-1 mm, the effect is obtained and then pretreatment at the temperature of 88-91 DEG Cis performed and the heat is preserved for 3-5 h and then the capacitor core is transferred to a second baking box and the second baking box is filled with nitrogen to raise the temperature by 121-128DEG C and the heat is kept for 3.5-5h. The core cutting layer is detected by the microscope and the thickness of the strengthened layer is 1-8 microns so that the effect is obvious in comparison withthe conventional direct heat setting that the detected thickness of the cross section oxide layer is 20-34 microns.

The invention discloses a high-temperature melt granulation smelting furnace which comprises a metal shell, wherein the metal shell is sealed by a heating furnace closed cover. The high-temperature melt granulation smelting furnace is characterized in that a partition plate is arranged in the metal shell, the inside of the metal shell is divided into an upper box and a lower box by the partition plate, a center through hole is formed in the partition plate, a crucible is placed on the partition plate and provided with a funnel-shaped bottom, a discharging hole is formed in the bottom of the crucible, the bottom of the crucible penetrates the center through hole and is inserted into the lower box, a heat insulation layer is arranged between the wall of the crucible and the inner wall of the metal shell, a discharging port is formed in the bottom of the metal shell and corresponds to the discharging hole, a through hole is formed in the heating furnace closed cover, one end of a lifting bar penetrates the through hole and is inserted into the crucible, the discharging hole is plugged, the other end of the lifting bar is arranged outside the heating furnace closed cover and is connected with a rotating wheel through a connecting rod, and a vacuum pumping pipe, an air inflation pipe and an exhaust pipe are arranged in the metal shell. The high-temperature melt granulation smelting furnace can generate high-temperature molten particles meeting requirements and can be widely applied to the fields of chemical industries, steel and the like.