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290results about How to "Highly creative" patented technology

Friction stir welding apparatus, system and method

A method of performing friction stir welding is provided herein. More specifically, traditional friction stir welding requires a rotatable head that is forced against a plurality of work pieces to bond the same. The rotational and normal forces generated by the friction stir welding tool are generally reacted by a backing plate, anvil, mandrel or other mechanisms, such hardware are subject to the applied forces and are often supported with additional internal supports. Conversely, a method of performing a friction stir weld is described that omits the need for such a backing member and internal supports as it is performed using a self reacting pin tool.
Owner:UNITED LAUNCH ALLIANCE

Dynamic slit width simulation system and method for slit

The invention relates to a dynamic slit width simulation system and method for a slit. The dynamic slit width simulation system comprises a press, a spring disk and a rock core clamp, wherein the rock core clamp is coaxially arranged between an upper pressing plate and a lower pressing plate of the press; a rock core is embedded into the rock core clamp; the front part of the rock core clamp is connected with a middle container and a displacement pump in sequence by pipelines; the rear part of the rock core clamp is connected with a back pressure valve and a liquid meter in sequence through pipelines; the spring disk is coaxially mounted between the rock core clamp and the upper pressing plate of the press; displacement sensors are symmetrically mounted on two sides of the rock core clamp at the bottom of the spring disk; when the pressure of fluid in the rock core is increased, the spring disk and the rock core are compressed to generate certain deformation to expand the slit, and the displacement sensors are used for detecting the width of the slit. The dynamic slit width simulation system can dynamically monitor a change value of the width of the slit between the two rock cores, and is scientific and reasonable in structural design and high in measured data accuracy.
Owner:卢渊 +2

Big data analysis system and method for cross-border trade

The invention relates to the field of computer, specifically relates to a big data analysis system and a method for cross-border trade, and the system comprises the following modules: a user role module, a foreign trade data management module, a self-defining module, a query module and a foreign trade index module; all in all, the system and method have advantages of creativity, rationality, low time consumption, low cost, wide application range, accurate data and high efficiency and can accurately access present cross-border trade condition.
Owner:ZHENGZHOU NORMAL UNIV

Friction welding apparatus, system and method

A friction stir welding apparatus is provided herein. More specifically, traditional friction stir welding requires a rotatable head that is forced against a plurality of work pieces to bond the same. The rotational and normal forces generated by the friction stir welding tool are generally reacted by a backing plate, anvil, mandrel or other mechanisms, such hardware are subject to the applied forces and are often supported with additional internal supports. Conversely, an apparatus for performing a friction stir weld is described that omits the need for such a backing member and internal supports as it is performed using a self reacting pin tool.
Owner:UNITED LAUNCH ALLIANCE

Auxiliary mechanical arm for electric power inspection unmanned aerial vehicle and control system thereof

The invention discloses an auxiliary mechanical arm for an electric power inspection unmanned aerial vehicle and a control system thereof. The auxiliary mechanical arm comprises an unmanned aerial vehicle bottom plate made of insulating epoxy resin, a turnover cross beam is hinged to the lower part of the unmanned aerial vehicle bottom plate, the turnover cross beam is internally insulated and rotationally connected with a rotating arm, a first steering engine providing turnover power for the turnover cross beam and the rotating arm is fixedly arranged at the bottom of the unmanned aerial vehicle bottom plate, and a second steering engine providing rotating power for the rotating arm is fixedly arranged at one end of the turnover cross beam. According to the auxiliary mechanical arm and the control system thereof, a carrying platform for various detection equipment is provided for the electric power inspection unmanned aerial vehicle, the functionality of the unmanned aerial vehicle inelectric power inspection operation is effectively improved, the situations of the protection of an unmanned aerial vehicle body and the influence of the unmanned aerial vehicle contact electrified part on the unmanned aerial vehicle are fully considered, and meanwhile, by means of a plurality of technical fields such as comprehensive communication, automatic control and an insulation technology,the maintenance operation of an overhead power transmission line by assisting the manual operation or replacing manual operation is completed.
Owner:STATE GRID TIANJIN ELECTRIC POWER +1

Genes encoding chavicol/eugenol synthase from the creosote bush larrea tridentata

ActiveUS20100031398A1Novel propertyPromote generationFungiBacteriaLarreaCreosote
Particular aspects provide novel methods for redirecting carbon allocation in plants or cell culture from lignification to inherently more useful and tractable materials, and to facilitate the generation of, e.g., biofuels from the remaining plant roculture biomass. Particular aspects provided novel methods for converting monolignols into allyl / propenyl phenols, and for chavicol / eugenol formation or production. Additional aspects relate to the discovery of novel chavicol / eugenol synthases that convert p-coumaryl / coniferyl alcohol esters into chavicol / eugenol, and to novel compositions (e.g., novel proteins and nucleic acids encoding same), and novel methods using same for producing or forming chavicol / eugenol and other derivatives in cell culture and / or genetically modified plants, and for re-engineering the composition of plant biomass. Particular aspects provide novel methods for generation in culture or in planta of liquid / combustible allyl / propenyl phenols, and these phenolic products are utilized for (non-ethanol) biofuel / bioenergy purposes, while the remaining plant biomass facilitates the generation of other biofuels.
Owner:WASHINGTON STATE UNIVERSITY

Friction stir welding apparatus, system and method

A friction stir welding system is provided herein. More specifically, traditional friction stir welding requires a rotatable head that is forced against a plurality of work pieces to bond the same. The rotational and normal forces generated by the friction stir welding tool are generally reacted by a backing plate, anvil, mandrel or other mechanisms, such hardware are subject to the applied forces and are often supported with additional internal supports. Conversely, a friction stir weld system is described that omits the need for such a backing member and internal supports as it is performed using a self reacting pin tool.
Owner:UNITED LAUNCH ALLIANCE

Train for quick sealing of pipeline

ActiveCN104879604ASolve the difficult problem of blockingWork closelyPigs/molesRubber ringRemote control
The invention relates to a train for quick sealing of a pipeline. The train comprises a cleaner and a sealer. A connecting component and a power transmission part are provided between the cleaner and the sealer. The cleaner is provided with a cavity in which a power unit is provided; a sealing component is provided outside the cavity; the sealer is provided with an axial guide rod in the middle; a moving part is provided outside the axial guide rod; the peripheral front end of the moving part is provided with a plurality of slips, the bottom of each which is wedged; outside the moving part, a wedge corresponding to the wedged bottoms of the slips is provided; the peripheral surface of each slip is provided with fastening ribs; the rear of the periphery of the moving part is provided with a rubber ring; a compression ring is provided at the front of the rubber ring; the front and rear ends of the sealer are peripherally provided with a plurality of pulleys; the moving part is in guide control connection with a spring guide rod; the cavity of the cleaner is further internally provided with a controller and a remote control; the controller is in operation control connection with the power unit. The train is suitable for pipeline sealing and has the advantages such as high operating efficiency, reliable sealing performance and firmness, high adaptability and lower maintenance cost.
Owner:周庆涛

High-temperature high-pressure foam liquid dynamic filtration evaluation system and method

The invention relates to a high-temperature high-pressure foam liquid dynamic filtration evaluation system and method. A filtration system comprises a filtration chamber and a stirrer, wherein a paddle-type stirrer is mounted in the filtration chamber; bubbled liquid and gas are mixed fully and uniformly, and meanwhile, the foam liquid is driven to rotate and move relative to the surface of a rock core; the filtration chamber is connected with a gas supercharging device and a heating device respectively; the gas supercharging device can ensure the filtration pressure in the filtration chamber to keep stable; a gas-liquid separator is connected with the outlet end of a back-pressure valve; the gas-liquid separator is connected with a gas metering device and a liquid metering device respectively. The high-temperature high-pressure foam liquid dynamic filtration evaluation system and method provided by the invention have the advantages that the system is scientific and reasonable in design, the evaluation method is accurate, and higher creativity is achieved.
Owner:伊向艺 +2

Friction stir welding apparatus, system and method

A method of performing friction stir welding is provided herein. More specifically, traditional friction stir welding requires a rotatable head that is forced against a plurality of work pieces to bond the same. The rotational and normal forces generated by the friction stir welding tool are generally reacted by a backing plate, anvil, mandrel or other mechanisms, such hardware are subject to the applied forces and are often supported with additional internal supports. Conversely, a method of performing a friction stir weld is described that omits the need for such a backing member and internal supports as it is performed using a self reacting pin tool.
Owner:UNITED LAUNCH ALLIANCE

Hollow pattern template vertical circulating system for making decorative board and technological method

InactiveCN1891421AAccurate industrial productionAccurate and unmistakable combination of industrial productionFeeding arrangmentsSurface layerChange color
This invention relates to a hollow pattern template cubic circulation system for manufacturing decoration plates and its method characterizing that 2-50 blocks are placed levelly on their own supporting frames by hollow pattern templates of the pattern raw material and arrayed on the combined supporting frames in vertical direction orderly to manufacture circularly changed patterns, which can be operated industrially and form circularly changed color patterns effectively, accurately and quickly suitable for the manufacture of base color variance technology of ceramic surface layer powder pattern and flooring decoration materials of ceramic, glass, micro-crystal glass and artificial stones with resin.
Owner:杨德宁

Disc body drilling machine for floor sweeping disc machining

The invention discloses a disc body drilling machine for floor sweeping disc machining, and belongs to the technical field of floor sweeping disc machining. The disc body drilling machine comprises abottom plate; and a fixing frame is arranged on the right side of the top end of the bottom plate. An arranged multi-angle drilling mechanism takes an initial position of a drill bit as a fixed pointand the fixed point as the circle center, a drill rod rotates around the fixed point through a mechanical transmission mechanism to complete adjustment of the drilling angle, during drilling, the drill rod can be moved to the next drilling path through a lifting mechanism by calculating the radius difference of annular brush wire holes in a brush disc, therefore the movement track programming process of the drill rod becomes extremely simple, and the disc body drilling machine is quite suitable for modern automatic production equipment; when the drilling angle is adjusted and the drill rod ismoved to the corresponding drilling path, a mounting shaft can drive a brush disc body to rotate, and therefore the drilling process of brush wire holes in the same annular path can be completed in sequence, so that the multi-angle hole punching efficiency is greatly improved; and it can be seen that the angle adjusting mode of the disc body drilling machine has extremely high superiority and creativity.
Owner:安徽省玉环清洗设备制造有限公司

Friction pendulum earthquake reduction and isolation support with multilayer shear force pins

The invention discloses a friction pendulum earthquake reduction and isolation support with multilayer shear force pins. The friction pendulum earthquake reduction and isolation support is characterized in that multilayer earthquake isolation baffle rings coaxially sleeve the top of an earthquake reduction base and are fixedly connected with the earthquake reduction base by the shear force pins, slide cushion areas are arranged between the multilayer earthquake isolation baffle rings, and the inner wall of the earthquake isolation baffle ring of the innermost layer is connected with the side walls of an earthquake reduction spherical pendulum in a slide fit manner; a limit skirt which is slidably connected with the side walls of the earthquake reduction spherical pendulum is arranged at the bottom of an upper seat plate by means of manufacturing, and the swing directions of the earthquake reduction spherical pendulum can be restrained by the limit skirt. The friction pendulum earthquake reduction and isolation support has the advantages that horizontal displacement friction pendulum earthquake reduction and isolation support structural types can be controlled under the effects of medium earthquake and major earthquake, accordingly, targets on multiple properties or targets on the earthquake resistance of bridges under multilevel earthquake ground motion can be met by the friction pendulum earthquake reduction and isolation support, and the friction pendulum earthquake reduction and isolation support is high in applicability.
Owner:RES INST OF HIGHWAY MINIST OF TRANSPORT

Full-diameter rock core hydrofracturing ultrasonic detection method with independent axial stress loading

The invention relates to a full-diameter rock core hydrofracturing ultrasonic detection method under an independent axial stress loading condition. An axial loading system is designed as two semi-cylindrical anvils, and thus two sets of independent axial loads can be provided on a rock core end surface. The axial loading system is supplied with pressure through a hydraulic pump; hydraulic pressure is conducted to the two semi-cylindrical anvils inside a clamp through controllable valves respectively; the semi-cylindrical anvils are moveable parts which can displace in an axial direction, and thus two sets of axial stress can be generated in a rock core inside the clamp; and ultrasonic wave generation / receiving probes are mounted on end surfaces of the anvils, after the rock core is stable after stress deformation, a central hole of the rock core is filled with fracturing fluid, then a crack of a certain form is generated, and a general extension direction and the extension range of the crack can be detected by using an ultrasonic technique. The method is an evaluation method applicable to research on expansion rules of hydraulic fracture and natural fracture in a complex crustal stress state, and the method is scientific and reasonable in design, accurate in evaluation method and relatively high in creativity.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY

Staggered vertical-type bicycle parking device

The invention provides a staggered vertical-type bicycle parking device and relates to the technical field of public transportation. The staggered vertical-type bicycle parking device comprises a placement mechanism and a lifting mechanism. The placement mechanism comprises a first frame body, and a spindle is arranged in the middle of the first frame body. The lower end of the spindle is connected with a first motor, and a rotary disc is arranged on the spindle. A plurality of self-locking guide rail devices are annularly arranged on the rotary disc and comprise supports which are provided with first guide rails. The first guide rails are slidably connected with parking frames, and the supports are further provided with locking switches for limiting the parking frames. The lifting mechanism comprises a second frame body which is connected with the first frame body. The second frame body communicates with the first frame body, and a conveying cabin is formed in the second frame body. The staggered vertical-type bicycle parking device has the beneficial effects that the structure is ingenious, the intelligent degree is high, bicycle efficient parking in cities is facilitated, and roads are kept to be clean and tidy.
Owner:FOSHAN UNIVERSITY

Transmission assembly of agitator type washing machine

The invention relates to a transmission assembly of an agitator type washing machine. The transmission assembly comprises a mounting plate connected with a shell of the washing machine, a driving belt pulley, a main shaft component which is fixedly connected with an impeller of the washing machine, a shaft sleeve which is fixedly connected with an inner barrel of the washing machine, a clutching device and a braking device, wherein the lower end of the main shaft component is fixedly connected with the driving belt pulley; the shaft sleeve and the main shaft component are coaxially arranged in a rotating mode; the lower part of the shaft sleeve is connected with the driving belt pulley through the clutching device; the main shaft component consists of an input shaft and an output shaft; a planet wheel speed reduction component and a positive and negative rotation output component are arranged between the input shaft and the output shaft; and the braking device is provided with a conical disc braking mechanism and a braking control mechanism. According to the transmission assembly, a square thread clutching device, a frustum-shaped braking device, a planet wheel speed reduction device, a rack and a sector gear are used for outputting positive and negative torque; and the transmission assembly has a simple structure and long service life, is reliably driven and accurately braked, occupies a small space, is convenient to mount and maintain and is high in novelty and creativity.
Owner:CHANGZHOU XINYA ELECTROMOTOR

Cam profile line generating instrument and generating method

InactiveCN104626829ATeaching is simple and clearEasy and intuitive to teachNon-circular curve drawing instrumentsOperational systemEngineering
The invention belongs to the field of teaching instruments and particularly relates to a cam profile line generating instrument and a generating method. The cam profile line generating instrument comprises a rack, a constant acceleration and constant deceleration curve assembly, a cycloid curve assembly, a uniform speed curve assembly, a simple harmonic curve assembly, a curve selection assembly, a curve drawing platform and a control operation system, and the constant acceleration and constant deceleration curve assembly, the cycloid curve assembly, the uniform speed curve assembly, the simple harmonic curve assembly, the curve selection assembly, the curve drawing platform and the control operation system are installed on the rack. According to the cam profile line generating instrument and the generating method, cam teaching can be simpler, clearer, convenient and visual, learners can enjoy the joy of practice, cam profile lines with different parameters can be drawn by adjusting parameters of a cam, and the cam profile line generating instrument and the generating method have the advantages of being good in operability and high in demonstration performance.
Owner:JIANGXI UNIV OF SCI & TECH

Differential air-pressure spray dust removing system and implementation method thereof

The invention discloses a differential air-pressure spray dust removing system and solves the problems that power potential energy losing after deceleration of motorized or non-motorized objects by deceleration strips or public place buffering is not utilized effectively, current dust removing systems are complicated in structure, high in cost, need external power supplies or other power supplies in the prior art. The spray dust removing system comprises a deceleration strip, air sacs, a water and pressure storage device, and a spray actuation mechanism. The air sacs are disposed in the deceleration strip or a public passage. The water and pressure storage device is communicated with the air sacs through an air guide tube. The spray actuation mechanism is disposed on the water and pressure storage device. The water and pressure storage device mainly comprises a water and pressure storage tank. The spray actuation mechanism comprises a flow guide tube. The lower end of the flow guide tube penetrates into the water and pressure storage tank. The upper end of the flow guide tube is located outside the water and pressure storage tank. A spray nozzle is disposed at the upper end of the flow guide tube. The invention further discloses an implementation method of the spray dust removing system. The spray dust removing system is simple in structure, convenient to implement, energy-saving and environment-friendly.
Owner:吴英戈

Mask structure with sound amplifying function

ActiveCN104207374ASoft materialWearing Comfort GuaranteeProtective garmentTechnical innovationEngineering
The invention discloses a mask structure with a sound amplifying function. The mask structure comprises a mask main body and elastic ear bands connected to two ends of the mask main body. The mask structure is characterized in that the mask main body is formed by punching a filter material into an arch matched with the mouth and nose part of a person through a die; a stepped connected groove is formed at the position, corresponding to the mouth and nose of the person, of the inner side of the mask main body; a silica gel clamping groove is attached to the connected groove; an air grate box with a built-in sound amplifying circuit is clamped in the silica gel clamping groove. The mask structure is skillful in design and reasonable in structure; the mask has a high protective effect and language communicating convenience, is a technical innovation in the field of masks and has important technical research significance and wide development space.
Owner:CHENGDU HEXU MEDICAL TECH CO LTD

Optical efficiency analysis method for light condensation and heat collection system of solar thermal power generation

The invention discloses an optical efficiency analysis method for a light condensation and heat collection system of solar thermal power generation, solving the problem of an analysis method for light absorption efficiency of the light condensation and heat collection system of large-sized slot type solar thermal power generation. The method comprises the following steps of: photographing a parabolic reflector through a calibrating camera to obtain a three-dimensional digital model of the parabolic reflector; importing the three-dimensional digital model of the parabolic reflector into a computer to obtain a graphic parameter of the parabolic reflector; establishing an analysis model of the parabolic reflector and a heat collection pipe through the graphic parameter of the parabolic reflector; and simulating incidence of sunlight into the established analysis model through the computer so as to acquire a simulation analysis result. According to the optical efficiency analysis method, the influence of an environmental factor is also considered under an actual working condition, can be used as a theoretical analysis tool of the heat collection system and a confirmatory analysis tool under an actual working condition, and has extremely high practicability, convenience, creativity and economy.
Owner:天威新能源系统工程(北京)有限公司

Generating building block

The invention relates to a generating building block used for driving a movable building block group. The generating building block comprises a perspective shell combined with the movable building block group, a rotating piece, a generator, a gear set and a circuit set, wherein the rotating piece is arranged outside the shell and can rotate under the action of an external force; the generator is accommodated in the shell; the gear set forms linkage with the rotating piece to transmit power to the generator; and the circuit set is electrically connected with the generator and used for storing electric power and outputting the electric power to the movable building block. Therefore, the generating building block can supply required electric power per se and achieve the purpose of edutainment in the processes of power generating and power supply.
Owner:GENIUS TOY TAIWAN CO LTD

Modified regeneration high impact polystyrene for tubes and pipe fittings and preparation method of high impact polystyrene

InactiveCN102775715ALow costImprove the economic efficiency of the enterpriseSilane couplingCalcium carbonate
The invention discloses modified regeneration high impact polystyrene for tubes and pipe fittings and a preparation method of the high impact polystyrene, which solve the problems of high cost and complex method of the conventional high impact polystyrene for the tubes and pipe fittings. The modified regeneration high impact polystyrene mainly comprises the following components by weight percentage: 10%-50% of high impact polystyrene, 15%-80% of recycled high impact polystyrene, 5%-20% of toughening agent, 5%-40% of calcium carbonate, 0.1%-1% of antioxygen 1010, 0.3%-1% of silane coupling agent and 0.4%-2% of pigment. The invention also provides the preparation method of the modified regeneration high impact polystyrene for the tubes and pipe fittings. The preparation method can be used for effectively recycling waste high impact polystyrene. The modified regeneration high impact polystyrene for the tubes and pipe fittings has the advantages that resources are saved, the environment is protected, the cost is lowered, the preparation process is simplified and the like.
Owner:四川塑金科技有限公司

Varistor with novel short-circuit protection device

A type of piezoresistance equipped with new type short protecting device, the piezoresistance is parallel connected with the new type short protecting device, the short protecting device is hot melt body which at least includes two parts, thereinto at least one part is hollow part, the other part is solid part; the short protecting device includes insulator base noumenon, thermal deformation material subassembly, electrode, insulator outer cover; the insulator base includes through hole which is used to mount thermal deformation material subassembly and several mounting holes which is used to mount the insulator outer cover; the insulator base is equipped with fixed metal electrode; the thermal deformation material subassembly includes little conduit and big cannula which is set with thermal deformation material, temperature controlling weldable fusible alloy which is used to fill in the cavity of big cannula, the insulator outer cover includes protruding foot which matches with number and diameter of mounting hole and groove which spreads the insulator base noumenon. The invention is close mode protection, the structure is simple, and the safety is well, energy-saving, consummation is decreased, environmental protection, the operation is stable, and it is easy to detect; The efficiency is high, cost is low, and the service life is long.
Owner:甘立刚

Powder warm-compaction near-net molded molybdenum-based rare earth alloy top and manufacturing technology thereof

The invention discloses a powder warm-compaction near-net molded molybdenum-based rare earth alloy top and a manufacturing technology thereof. The manufacturing technology comprises key technologies of scientific proportioning of multi-element composite materials, ultrasonic homogenous solid-phase blending, flexible warm-compaction near-net molding, continuous successive sintering shaping and the like, and special technological devices matched with the key technologies in use, an operation technology procedure and technology parameters are also involved in the manufacturing technology. Hot piercing molding operation adopted in the seamless steel pipe manufacturing industry, especially the high-nickel-chromium thick-wall stainless steel seamless tube manufacturing industry is provided with the new high-tech powder metallurgy warm-compaction near-net molded molybdenum-based rare earth alloy top product which has the beneficial effects of good high-temperature red hardness, high strength, high cold and hot fatigue resistance stability, long service life, good working quality and the like. The manufacturing technology has the outstanding beneficial effects that the system is complete and comprehensive, the technology is advanced and reliable, the number of configured devices is less, and the operation cost is low. By the adoption of the manufacturing technology, industrial volume production can be achieved. After the manufacturing technology is applied and popularized, a large amount of precious resources such as rare precious metals molybdenum and rare earth can be greatly saved.
Owner:SIPING BEIWEI METAL TECH RES DEV

Method for designing tobacco formula

The invention relates to a method for designing a tobacco formula. The method includes the steps that on the basis that measured values of characteristic parameters of tobacco raw materials are obtained through detecting, target values of the characteristic parameters are set; processing is carried out through a weighing absolute-value distance analysis method, and weighing distance absolute values between the measured values and the target values of the characteristic parameters are obtained; after the tobacco raw materials are ranked according to the increasing order of the weighing distance absolute values, the new tobacco formula is obtained through module design and skeleton design. The method is easy and convenient to operate and wide in application range; the reasonability and the balance of the formula design can be well achieved, and the quality of a cigarette formula product can be easily improved.
Owner:SHANGHAI LENGGUANG TECH CO LTD

Production technology of beam-dyed double-layer two-way stretch fabric

The invention discloses a production technology of beam-dyed double-layer two-way stretch fabric. The production technology comprises the following steps: preparation of a surface beam, dyeing pretreatment of the surface beam, dyeing of the surface beam, soaping of the surface beam, foam slashing of the surface beam, preparation of a lining beam, pretreatment of the lining beam, dyeing of the lining beam, soaping of the lining beam, foam slashing of the lining beam, weaving and after finishing. According to the production technology of the beam-dyed double-layer two-way stretch fabric, the surface is formed by interweaving nylon fiber core spun yarn, and the lining is formed by interweaving corn spun yarn taking tencel and Coolmax as a coating layer. According to the double double-layer two-way stretch fabric, the surface has wear resistance of nylon fiber, the lining has moisture absorption and removal effect of the tencel and the Coolmax fiber, and the creativity and durability of the fabric are improved. Besides, yarn hairiness and neps on warp can be reduced by beam dyeing sizing, so that weaving is performed smoothly. The process of the production technology can be shortened and production efficiency can be improved.
Owner:浙江鸣春纺织股份有限公司

Method for performing catalyzed synthesis on polyaspartic acid through one-step process of novel solid acid catalyst

The invention relates to the field of macromolecular synthesis and discloses a method for performing catalyzed synthesis on polyaspartic acid through a one-step process of a novel solid acid catalyst. The method comprises the following steps: (1) adding maleic anhydride into a reactor, adding deionized water, introducing cooling water for cooling, dropwise adding ammonia water, and discharging water after the reaction is completed; (2) adding an acid modified montmorillonite catalyst and liquid paraffin into the reactor, heating to a polymerization temperature, introducing cooling water for cooling after the reaction, and discharging the reaction solution; and (3) pouring and recovering the liquid paraffin in the reaction solution, adding the obtained reddish brown viscous liquid into the reactor, adding deionized water into the reactor, filtering, precipitating the filtrate by using a precipitator, separating and drying to obtain the polyaspartic acid. With the adoption of the novel solid acid catalyst, the molecular weight of the polyaspartic acid can be improved. In addition, due to the addition of slightly excessive ammonia water, polymerization and hydrolysis reactions can be carried out in the same system, the synthetic process is simplified, and large-scale production is facilitated.
Owner:NINGBO ZHETIE JIANGNING CHEM +1

Refined blast construction method for narrow deep foundation pit under complicated geological condition

ActiveCN111442701AVibration has a big impactLow efficiencyBlastingSlurry wallStructural engineering
A refined blast construction method for a narrow deep foundation pit under a complicated geological condition comprises the following steps: step 1, flattening a field; step 2, excavating earth in a foundation pit area; step 3, carrying out trench blast construction and shallow hole step blast of a main blast area foundation pit; step 4, performing static breaking excavation on a diaphragm wall and rock in the area near latticed columns; and step 5, conducting waist beam and support construction, and then repeating construction in the steps 3-5 until the foundation pit is excavated. The methoddivides different blast areas, the refined combined blast excavation manner is adopted, and a convenient construction method is provided for excavation of the narrow rocky deep foundation pit. By arrangement of the protection scope of the latticed columns and diaphragm walls, the refined construction method combining trench blast, shallow hole step blast and static blast is adopted, and rapid breaking construction is performed on foundation pit rock. The arrangement of construction of edge expansion assisted holes fully utilizes the stress of rock, the excavation efficiency is improved, and the vibration damage of blast is reduced.
Owner:CHINA RAILWAY 18TH BUREAU GRP CO LTD +1

Passive type permanent magnet repulsion type magnetic bearing structure

The invention discloses a passive type permanent magnet repulsion type magnetic bearing structure. The passive type permanent magnet repulsion type magnetic bearing structure comprises a rotor and a stator. A plurality of first rotor grooves are formed in the outer wall of the front half portion of the rotor. First rotor magnetism isolating sheets and first rotor permanent magnets are arranged inthe first rotor grooves. A plurality of second rotor grooves are formed in the outer wall of the rear half portion of the rotor. Second rotor magnetism isolating sheets and second rotor permanent magnets are arranged in the second rotor grooves. The stator sleeves the rotor. A gap is formed between the stator and the rotor. A first stator groove is formed in the upper inner end wall of the stator.A first stator magnetism isolating sheet and a first stator permanent magnet are arranged in the first stator groove. Second stator grooves are formed in the left inner end wall, right inner end walland lower inner end wall of the stator. Second stator magnetism isolating sheets and second stator permanent magnets are arranged in the second stator grooves. A rubber damping ring sleeves the outerend of the stator. A bearing block sleeves the outer end of the rubber damping ring. The passive type permanent magnet repulsion type magnetic bearing structure is provided with the rubber damping ring, and is simple in overall structure, small in size and good in vibration reduction effect.
Owner:SHANDONG UNIV OF SCI & TECH
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