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3313 results about "Vacuum pumping" patented technology

Temperature measurement and calibration platform in space vacuum environment

The invention relates to a temperature measurement and calibration platform in space vacuum environment. The temperature measurement and calibration platform is favorable for realizing the simultaneous calibration of contact type temperature measurement and non-contact type temperature measurement, so the temperature measurement and calibration platform is served for heat vacuum and heat balance experiments of spacecrafts such as satellites, spaceship and the like. The temperature measurement and calibration platform comprises a constant temperature bath, wherein a double-sub-cavity vacuum cavity, the double-sub-cavity vacuum cavity comprises a first vacuum cavity body and a second vacuum cavity body, the first vacuum cavity body and the second vacuum cavity body are connected with a vacuum pumping device through a three-way valve, standard temperature indicator sensors are respectively arranged on the outer wall of the first vacuum cavity body and on the outer wall of the second vacuum cavity body, the standard temperature indicator sensors are connected with a temperature secondary meter, a laser light path reflecting device is arranged in the vacuum cavity of the first vacuum cavity body for calibrating a non-contact type temperature measuring system based on the tunable diode laser absorption spectrum technology, and the vacuum cavity of the second vacuum cavity body is used for accommodating a temperature sensor for calibrating a contact type temperature measuring system adopting the temperature sensor.
Owner:BEIJING DONGFANG MEASUREMENT & TEST INST

Bidirectional tosh grinding ultra-fine crashing objects and its method

The present invention discloses a bidirectional-rotating ball-milling ultra-fine crushing device and the method thereof. The device is arranged with a jacket which is provided with cooling water; a closed material storing warehouse which closes the feeding/discharging material opening is arranged at the lower end of the barrel body; a vacuum pumping valve which is connected with the vacuum pumping device is arranged at random feeding/discharging cover plate on the barrel body; and an inner lining is arranged at the inner surface of the barrel body. The bidirectional-rotating ball-milling ultra-fine crushing method is doing vacuum pumping to the inner side of the barrel body and actuating the transmission device to do ultra-fine crushing when the raw material above 80 mu is added into the barrel body, wherein the rotary speed of the barrel is 40 to 70 rotation/minute and the rotary speed of the inner rotating axle is 20 to 40 rotation/minute; the mass of the grinding ball gradation phi between 5 to 10mm accounts for 35% to 55% of the total grinding ball mass, phi between 10 to 20mm accounts for 25% to 35% of the total grinding ball mass and the phi between 20 to 30mm accounts for 20% to 35% of the total grinding ball mass; and the mass ratio of the material ball is 1:4 to 1:15. The invention has the advantages of short producing time, low energy consumption and reduced producing cost, and the invention overcomes the fine particle problems of easy aggregation to block and fusing-aggregation, etc.
Owner:NANJING UNIV OF SCI & TECH

High-temperature high-pressure explosion limit tester, method for determining explosion limit, and application thereof

ActiveCN102937603AReduce wall effectMaterial exposibilityEngineeringHigh pressure
The invention provides a novel high-temperature high-pressure explosion limit tester comprising a raw material gas supply apparatus, an explosion determination device, a vacuum generating device, and a controlling device. The explosion determination device is mainly composed of a pressure sensor, a temperature sensor, and an igniter. The explosion determination device is used for determining explosion limit, explosion pressure and explosion temperature of the gas or vapor. The vacuum generating device is used in vacuum pumping upon the explosion determination device. The controlling device is used for determining, controlling and collecting experimental data generated during the experiment. Compared with prior arts, the high-temperature high-pressure explosion limit tester provided by the invention has a temperature testing range of room temperature to 400 DEG C, which is higher than 200 DEG C which is a maximal temperature of instruments in existing standards; the tester provided by the invention has a pressure range of normal pressure to 2.2MPa, which is higher than 1.38MPa which is a maximal pressure of instruments in existing standards; and the tester provided by the invention has a test volume of 10L, which is larger than that of an existing tube-type explosion limit tester, such that a wall effect can be better reduced.
Owner:CHINA PETROLEUM & CHEM CORP +1

Method and device for preparing high-silicon silicon steel sheet in static magnetic field with powder sintering method

ActiveCN102658367AAccurate control of silicon contentHigh densityInorganic material magnetismInlet valveExhaust pipe
The invention relates to a method and device for preparing a silicon steel sheet in a static magnetic field with a powder sintering method. The specific process of the method consists of the following steps of: mixing Fe-Si powder; rolling into a plate blank; and sintering a Fe-6.5 weight percent Si green compact in a static magnetic field. In the method, 6.5 percent by weight of Si high-silicon steel with high density is obtained by using the influence of the magnetic field on the sintering densification and orientation process of a Fe-6.5 weight percent Si powder green compact, and an easily-magnetized axis is oriented along the magnetic field. An atmosphere/vacuum sintering device in a static magnetic field consists of a temperature control device, an exhaust pipe, a thermocouple, a heating element, a corundum crucible, a refractory fiber, a support block, a heat insulating block, a water-cooled bush, a static magnetic field generating device, a sealed corundum pipe, an inert gas inlet valve, a vacuum pumping valve, a Fe-6.5weight percent Si green compact, a thin corundum plate interlayer and a fixing molybdenum wire. The 6.5 percent Si silicon steel sheet prepared with the method has the advantages of near net molding, superior magnetic property, high orientation degree and the like, and has a remarkable industrial application prospect.
Owner:SHANGHAI UNIV

Hot melt adhesive used for automotive interiors, and preparation method of hot melt adhesive

The invention discloses a hot melt adhesive used for automotive interiors, and a preparation method of the hot melt adhesive. The hot melt adhesive used for automotive interiors is characterized by comprising a proportion of paraffin, polyethylene wax, a thermoplastic elastic body SBS, random polyolefin, polyethylene vinyl acetate, C5 petroleum resin, rosin pentaerythritol ester, antioxygen, coupling agent and filler. The preparation method comprising the following steps: heating a stirring kettle to 140 to 160 DEG C, and adding the paraffin and the polyethylene wax; adding the thermoplastic elastic body SBS, vacuum-pumping and keeping warm, adding HMW(high molecular weight) random polyolefin I, HMW random polyolefin II and the antioxygen; adding the coupling agent and the filler; cooling, and adding polyethylene vinyl acetate I and polyethylene vinyl acetate II; cooling and adding the C5 petroleum resin; adding the rosin pentaerythritol ester and keeping warm; and emptying the stirring kettle, pressurizing, discharging and forming. No pollution or poison is produced during the production process of the hot melt adhesive; and the hot melt adhesive has the advantages of high adhesion strength, long opening time, good temperature resistance, strong ageing resistance, good tenacity, strong waterproofness and the like.
Owner:浙江固特新材料科技股份有限公司

Negative pressure osmosis test device

InactiveCN103411869ASolving Penetration Testing ProblemsSimple structurePermeability/surface area analysisWater storageVacuum pumping
The invention discloses a negative pressure osmosis test device which comprises a base, a soil sample ring, a porous permeable stone, a water storage container, an electronic balance, a vacuum pump, a pressure gauge and a sealed container, wherein the soil sample is arranged in the cylindrical soil sample ring, the upper end of a sample is connected with the water storage container, and the bottom end of the sample is connected with the sealed container and the vacuum pump; a pressure difference is formed at two ends of the soil sample through vacuum-pumping, and water seeps in the soil sample under the action of the pressure difference; an osmotic coefficient of the soil sample can be obtained through calculating the amount of water passing though the soil sample in unit time; a load applying piston at the upper end of the sample can apply vertical load so as to solidify the soil; osmosis tests of different solidifying pressures can be performed to simulate the seepage of the practical field soil under different stress environments; the osmosis test can be directly performed on the prepared soil sample. Therefore, the test device has the advantages of simple structure, convenience in use, quick and convenient test, and obviously shortened test time, and is particularly suitable for the osmosis test of low-osmosis soil samples.
Owner:HEFEI UNIV OF TECH

Air insulating structure of vacuum insulation panel and packaging method thereof

InactiveCN101963267AReduce the number of heat-sealed edgesSave on packaging costsThermal insulationPipe protection by thermal insulationVacuum pumpingThermal bridge
The invention provides an air insulating structure of vacuum insulation panel, which is formed by composite material. The composite material does not contain aluminium foil layer; therefore, the heat bridge effect of seal edge during heat seal is avoided. The packaging method of the air insulating structure comprises the following steps of: folding a single piece of composite material to form a bag shaped air insulating structure having a size consistent with that of adiabatic core material according to the specification of the core material and form three seal edges; sealing part of sealing edges with heat, and keeping an opening for placing the adiabatic core material inside; filling the adiabatic core material in the air insulating structure, performing heat seal on the remained opening and keeping a vacuum pumping opening; and placing the air insulating structure, which is filled with the adiabatic core material and has a vacuum pumping opening, in a vacuum room and pumping to produce vacuum, and performing heat seal on the preserved vacuum pumping opening to form a vacuum thermal insulation panel. The air insulating structure has three seal edges, which are fewer than those of the conventional method; therefore, the integral heat bridge effect is reduced, the operation is simple, the appearance planeness of the vacuum insulation panel is improved, and the fold and air leakage of the air insulating structure in convention manufacturing process are avoided.
Owner:SHANGHAI MARITIME UNIVERSITY

Full-automatic continuous box type gas-control packing device

The invention relates to a completely automatic continuous box-typed air conditioning packaging machine, which is characterized in that operations of vacuum pumping, inflating and box packaging are respectively completed on two continuous working positions; an air replacing device comprises a sealing chamber which is connected with a cylinder shaft; a sealing chamber is internally provided with the air replacing device which respectively carries out the air pumping and inflating of the air replacing chamber by an external pumping pipeline and an inflating pipeline; the external inflating pipeline is arranged on an air conditioning auxiliary device which carries out the conditioning of the air in the box by the external inflating pipeline; a thermal sealing film guiding device and the air conditioning auxiliary device are connected on a frame; the thermal sealing device is fixedly connected with the frame by a connecting screw; a first film cutting device and a second film cutting device are respectively arranged on the frame. The completely automatic continuous box-typed air conditioning packaging machine has high air replacing rate and air mixing precision and quick packaging speed, meets the requirements of changed volume of the packaging products and various styles of exterior of the packaging boxes, and has the advantages of integrating the sealing and slicing into a whole, etc.
Owner:JIANGNAN UNIV

Condensate gas reservoir blockage relieving physical simulation experimental device and condensate gas reservoir blockage relieving physical simulation experimental method

PendingCN105239973ARealize dynamic simulationEasy to operateFluid removalVacuum pumpingRock core
The invention relates to a condensate gas reservoir blockage relieving physical simulation experimental device and a condensate gas reservoir blockage relieving physical simulation experimental method, and belongs to the technical field of oil field development experiment. The experimental device consists of a condensate gas reservoir model, an injection system, a production system and a data analysis system. The experimental device is used for performing preparation for simulating a rock core of a gas layer main model and simulating a rock core of a near wellbore zone model; the prepared rock cores are subjected to vacuum pumping and saturated gas condensation; a condensate gas reservoir blockage relieving experimental model is built; condensate gas reservoir seepage flow passage blockage simulation experiments and blockage relieving simulation experiments are performed; a condensate gas reservoir blockage relieving scheme is made according to obtained experimental data; the stratum temperature, the pressure and the depletion development process of the condensate gas reservoir can be simulated in a laboratory; the dynamic simulation of the depressurizing production and the gas injection swallowing-spitting blockage relieving of the condensate gas reservoir is realized; the blockage relieving gas injection quantity and the injection period of the simulated condensate gas reservoir are determined; the operation is simple and convenient; the implementation is easy; and the investment of a large amount of labor, materials and money on site is not needed.
Owner:CHINA PETROLEUM & CHEM CORP +1

Rubber seed oil polyalcohol and preparation method thereof

The invention relates to rubber seed oil polyalcohol and a preparation method thereof. The method comprises the following steps of: mixing rubber seed oil, hydrogen peroxide and a catalyst serving as raw materials in a weight ratio of 1:0.5-1.5:0.01-0.05, putting the mixture into a reaction kettle, stirring the mixture and raising temperature to 50 to 80 DEG C, keeping reaction temperature for 3 to 8 hours, lowering the temperature to 30 DEG C, separating acid water out, washing the mixture with aqueous solution of sodium carbonate until the pH of the mixture is between 5 and 6, washing the mixture to be neutral with saturated sodium chloride and water, and performing pressure reduction and water removal at the temperature of between 50 and 90 DEG C for 2 to 5 hours to obtain epoxy rubberseed oil; and adding the epoxy rubber seed oil, methanol, isopropanol and fluoboric acid into the reaction kettle in a weight ratio of 1:1-5:1-5:0.002-0.01, raising the temperature to 75 to 100 DEG C, performing a reaction for 0.5 to 3 hours, washing the reaction product with the aqueous solution of the sodium carbonate until the pH of the reaction product is between 5 and 6, washing the reaction product to be neutral with water, and performing vacuum pumping at the temperature of between 50 and 120 DEG C for 2 to 5 hours to obtain the rubber seed oil polyalcohol. In the method, the conventional petroleum chemical is replaced by a non-edible plant oil resource, so that the dependence of polyurethane industry on petroleum chemicals is reduced, and the added value of the rubber seed oil is increased.
Owner:SOUTHWEST FORESTRY UNIVERSITY

Anti-counterfeiting transfer printing technology

The invention relates to an anti-counterfeiting transfer printing technology which comprises the following steps: preparing a laser plate; coating a layer of mold release agent or imaging paint on a PET base film; carrying out vacuum pumping on the PET base film and an aluminum material device in a vacuum plating evaporator; then heating the aluminum material and depositing gaseous aluminum particles on the surface of the moving PET base film and/or the surface of the mold release agent or the imaging paint; stamping an embossing pattern on the laser plate on a mold release agent layer or an imaging paint layer and/or an aluminum layer so as to make a holographic transfer film for transfer; bonding the holographic transfer film and backing paper together; separating the PET base film from the paper, wherein the stripped PET base film can be repeatedly used for a coated base film; and coating a layer of aqueous varnish on the surface of the transferred paint layer and/or the aluminum layer. The technology can combine an anti-counterfeiting printing technology with a transfer printing technology, and an aluminum plating layer transferred on the paper can be made to be thin, thereby saving the aluminum material; in addition, the base film used in transfer printing can be repeatedly utilized and does not pollute the environment.
Owner:江苏中印印务集团有限公司

Microwave vacuum air pressure sintering furnace

ActiveCN104279860AFast sinteringEvenly sinteredMuffle furnacesRetort furnacesVacuum pumpingHigh density
The invention discloses a microwave vacuum air pressure sintering furnace, which comprises a furnace body, wherein the furnace body is connected with a vacuum pumping device and a pressurizing device, a heat insulation box body used for material sintering and heat loss reduction is arranged in the furnace body, the furnace body is provided with a micro wave generator used for feeding microwaves into an inner cavity of the furnace body, the microwave generator comprises a microwave source used for giving out the microwaves and a wave guide used for feeding the microwaves generated by the microwave source into the furnace body, the number of the microwave generator is one, a waveguide feed opening is formed in a direction towards the center of the heat insulation box body arranged in the furnace body, or the number of the microwave generators is several, the engaging directions of the microwave sources and the waveguide are in mutually vertical arrangement in the two adjacent microwave generators, in addition, the feeding-in direction of the waveguide engaged with the corresponding microwave sources deviates from the center of the heat insulation box, and the deviation distance of the feeding-in direction from the center of the heat insulation box is the odd number times of the wavelength of the microwaves. The uniform and fast sintering of high-density components adopting complicated structures can be realized.
Owner:湖南华冶微波科技有限公司

Intelligent flexible packaging production line for box type products

ActiveCN103935568ADynamic adjustment of process parametersWith intelligent line change functionPackaging automatic controlPackaging machinesWinding machineProduction line
The invention discloses an intelligent flexible packaging production line for box type products. The intelligent flexible packaging production line comprises a first roller conveying line, a second roller conveying line, a production line MES system, a WINCC system, a robot palletizer and four control cabinets. A scanner, a film sealing machine, a transferring boxing machine, a linear box sealing machine and a corner and edge box sealing machine are sequentially arranged between the feeding segment and the discharging segment of the first roller conveying line. A box body is arranged between the film sealing machine and the transferring boxing machine. A tray, a winding machine and a first packaging machine are sequentially arranged between the feeding segment and the discharging segment of the second roller conveying line. The robot palletizer is arranged between the feeding segment of the first roller conveying line and the discharging segment of the second roller conveying line. According to the intelligent flexible packaging production line for the box type products, the intelligent flexible packaging production line is compatible with the box type products with different appearances, procedures of feeding, film sealing, vacuum pumping, box opening, box entering, box sealing, weighing, packaging, stacking, marking, discharging and the like can be intelligently finished in a full-automatic mode. The intelligent flexible packaging production line for box type products is wide in application and suitable for packaging of many products in the communication industry.
Owner:XIAN AEROSPACE PRECISION ELECTROMECHANICAL INST

Experiment device for replacing CH4 in adsorption storage layer by multi-phase-state CO2 and mixed gas

The invention discloses an experiment device for replacing CH4 in an adsorption storage layer by multi-phase-state CO2 and mixed gas, comprising a gas source supply system, a liquid-state CO2 supply system, a pressurizing device, an oil bath heating groove, a gas distribution tank, a three-axis chamber, a gas collection and analysis system and a vacuum-pumping system, wherein the gas source supply system is directly communicated with the gas distribution tank; the liquid-state CO2 supply system is communicated with the gas distribution tank through the pressurizing device; the gas distribution tank is communicated with a gas injection opening of the three-axis chamber; a gas outlet of the three-axis chamber is respectively communicated with the gas collection and analysis system and the vacuum-pumping system; and the three-axis chamber and the three-axis chamber are placed into the oil bath heating groove. According to the experiment device disclosed by the invention, a process of replacing the CH4 in the adsorption storage layer (a coal layer and a shale gas storage layer) by different phase states of CO2 (a supercritical state and a gas state) under the effect of multi-field coupling effect can be simulated; and a process of replacing the CH4 in the adsorption storage layer by different mixed gases can also be simulated, so as to provide an experiment platform for relative experiments and mechanism researches.
Owner:CHONGQING UNIV

Method for separating dimethyl carbonate and methanol azeotrope

The utility model relates to a method which utilizes a vapour permeation membrane to separate dimethyl carbonate from methanol azeotrope. Saturated vapour at the temperature of 64 to 120 DEG C and with the pressure of 0.10 to 0.6 MPa is sent into a membrane separator and is contacted with a separation membrane, the downstream side of the membrane separator keeps the vacuum degree at 4 to 200 mmHg by vacuum pumping, the dimethyl carbonate first passes through a concentration membrance filter at the permeation side of the membrane and is condensed into liquid under the condition of vacuum and low pressure, the liquid mixture directly enters into an atmospheric rectifying column, dimethyl carbonate with more than or equal to ninety nine point five percent of content is produced from the bottom of the column, and high-concentration methanol is produced from the interception side of the membrane separator and enters into next technique unit. The separation membrane is an organic composite membrane, an organic and mineral composite membrane or a mineral membrane which can preferentially permeate dimethyl carbonate, and the method has the advantages of simple technique and low energy consumption; the throughput of the permeation of the membrane is increased, and the area of the membrane is reduced; safety and reliability are increased, and the purity of dimethyl carbonate is increased as well.
Owner:PETROCHINA CO LTD +1
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