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157results about How to "Mature technology" patented technology

Method for hoisting large-size workpiece in ordinary plant and hydraulic jacking equipment thereof

InactiveCN101712444AMature technologyTechnology leadershipLifting devicesElectric machineryStator
The invention relates to method for hoisting a large-size workpiece in an ordinary plant and hydraulic jacking equipment thereof. The invention is characterized in that hydraulic lifting devices of a hydraulic jacking system are erected above hydraulic jacking towers through a hoisting beam; the equipment is lifted to a platform height by the hydraulic lifting devices and then sent above a foundation, and the jacking towers are lowered to enable the equipment to take place; a hook used in the combined hoisting beam is connected with a hook beam through a two-way pin shaft, and the hook can rotate to realize rotating operations of a stator. The hydraulic jacking equipment comprises four hydraulic jacking towers, four hydraulic lifting devices, the combined hoisting beam, two tracks and a control board, wherein the four hydraulic jacking towers are respectively arranged above the two tracks to form a framework structure; sectional telescopic mechanisms are arranged in the hydraulic jacking towers, and telescopic control ends of the sectional telescopic mechanisms are connected with an output end of a hydraulic drive mechanism; the lower parts of the hydraulic jacking towers are provided with travelling wheels; and drive input ends of the travelling wheels are connected with a drive output end of a motor. The invention organically combines the hydraulic jacking system with a working principle integrating machines, electricity and liquid and has the characteristics of stable action, safety, reliability, large hoisting weight, convenient mounting and dismounting and obvious economic benefit.
Owner:GUANGDONG ELEVATOR ENG MACHINERY

Method for connecting convertor station into multiport flexible direct current transmission system in a live manner

InactiveCN103986176AMature technologyReliable operationElectric power transfer ac networkMature technologyCapacitive current
The invention relates to a method for connecting a convertor station into a multiport flexible direct current transmission system in a live manner, and pertains to the technical field of power electronics. According to the method, with the help of the structure characteristics of the flexible direct current transmission system itself, and through the characteristic that a disconnecting switch can be used to open and close a small-load current or a capacitive current, by appropriately reducing the flexible direct current system direct-current voltage, positive and negative electrode direct-current disconnecting switches are closed successively to realize the multiport flexible direct current transmission system live connection function. According to the invention, through the structure of the flexible direct current transmission system itself and the simple successive operation of the disconnecting switches, the multiport flexible direct-current transmission system live connection problem in the condition that a direct-current circuit breaker cannot be popularize and applied can be solved, advantages of mature technology, reliable operation, easy implementation and excellent performance can be realized, and the method can be applied into actual multiport flexible direct-current transmission projects.
Owner:CHINA SOUTH POWER GRID ELECTRIC POWER RES INST +2

Method for producing ethyl acetate with coupled reaction distillation and permeation steam generation

The invention relates to a method for producing ethyl acetate by reaction rectification and pervaporation coupling. The method is as follows: raw materials, namely acetic acid and ethanol are catalyzed in a reaction rectification tower and rectified, an organic phase is separated out from the distillate at the top of the tower and passes through a pervaporation permeable film component, wherein the contained water and ethanol selectively permeate the film and then enrich on the permeable side of the film to be removed; the ethyl acetate is obtained from the non-permeable side of the film; and part of the ethyl acetate as dehydrating agent is returned to the reaction rectification tower while the rest as a product is extracted; at the same time, part of liquor extracted from the tower bottom of the reaction rectification tower is introduced into another pervaporation permeable film component, the contained moisture is enriched on the permeable side of the film to be separated and removed, the ethyl acetate is obtained from the non-permeable side of the film, and the ethyl acetate is circularly returned to an acetic acid feeding hole of the reaction rectification tower. Compared with the prior art, the method can reduce reflux ratio greatly, has the advantages of simple technical route, energy saving, environmental protection and compact device, and reduces equipment investment and production cost for the ethyl acetate remarkably.
Owner:NANJING UNIV OF TECH

High-efficiency grating coupler based on intermediate-refractive-index waveguide material and preparation method therefor

InactiveCN109358394AHigh Diffractive Coupling EfficiencyMature technologyOptical waveguide light guidePhotoresistRefractive index
The invention discloses a high-efficiency grating coupler based on an intermediate-refractive-index waveguide material. The specific structure is a substrate, a lower cladding layer, an intermediate-refractive-index material layer, an insulating layer, an amorphous silicon grating, and an upper cladding layer from bottom to top. The invention also discloses a preparation method of the high-efficiency grating coupler based on the intermediate-refractive-index waveguide material. The method comprises the following steps of: first preparing a waveguide lower cladding layer and the intermediate-refractive-index material layer on the substrate; implementing a waveguide device in the intermediate-refractive-index material layer; growing an insulating layer and amorphous silicon on a surface of asample; transferring a grating structure to an electron beam glue or a photoresist layer by an electron beam or an ultraviolet exposure, and forming a grating pattern after development; and then transferring the grating structure to the amorphous silicon grating by an etching process; and finally, removing the electron beam glue or the photoresist layer, and growing the upper cladding layer. Theinvention has the advantages of simpler process steps, lower cost and higher tolerance of errors.
Owner:SUN YAT SEN UNIV

Innocent treatment method for leaded glass of abandoned cathode ray tube

An innocent treatment method for leaded glass of a abandoned cathode ray tube comprises the following steps: 1) washing and drying CRT cone glass, carrying out coarse crushing on the CRT cone glass to form particles, and placing the particles into a ball mill; 2) adding reducing agents and alkaline additives, carrying out activation on ball mill machinery for 4-6h to obtain mixed materials; 3) placing the mixed materials in a smelter to be roasted for 1h under the condition of the temperature of 900 DEG C to 1000 DEG C and nitrogen gas to obtain glass with lead content smaller than 2% on the upper layer of the ball mill and highly purified metallic lead on the bottom portion of the ball mill, and carrying out breaking and separation after the glass and the metallic lead are cooled. The innocent treatment method for the leaded glass of the abandoned cathode ray tube has the advantages that the high-energy ball mill is adopted as mechanical activation equipment, is high in activation efficiency, and can effectively reduce the reduction temperature of the CRT cone glass; the lead in the cone glass can be effectively recovered, and environmental pollution is reduced; the separated metallic metal and lead-free glass can be reused; the method is simple in process, convenient to operate, free of secondary pollution, easy to apply, and suitable for large-scale industrial production.
Owner:NANKAI UNIV

Yellow-green light strongly excitable molybdate red fluorescent material and preparation method thereof

The invention discloses a yellow-green light strongly excitable molybdate red fluorescent material and a preparation method thereof. The yellow-green light strongly excitable molybdate red fluorescent material has a scheelite type tetragonalcrystal structure, and the chemical formula of the material is AY0.5Eu0.5(MoO4)2, wherein A may be Li, Na or K. The light emitting material has the highest excitation strength when the wavelength is 530 to 545 nanometers, and the material belongs to a yellow-green light excitable red fluorescent material. The preparation method is a solid phase method or sol-gel method. The powdered molybdate red fluorescent material is mixed with yellow powder YAG:Ce<3+> or combined with the yellow powder YAG:Ce<3+> layer by layer, and the fluorescent powder layer and a blue light emitting diode (LED) are packaged by the conventional process to form a warm white LED element. The invention has the advantages that: the preparation process is simple and the technology is mature, so industrial production can be realized easily; and due to the addition of the molybdate red fluorescent material, the red component of the emission spectrum of the white LED element is compensated, the related color temperature is reduced to the lowest level, and the increasing requirements of people on light color quality of white light in solid lighting technology are met.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY

Online centralized monitoring system for distributed power distribution rooms

The invention discloses an online centralized monitoring system for distributed power distribution rooms, comprising a control device, a detection device, a video device, a field bus, a principal computer, a transmission device and a centralized monitoring device. The detection device and the control device are connected with the principal computer through the field bus. The principal computer and the video device are connected with the transmission device. The transmission device is in signal connection with the centralized monitoring device. The centralized monitoring device comprises a cloud server, an SCADA server, a GIS server and a video server. The centralized monitoring device integrates received data information of the SCADA server and the video server with geographic information in the GIS server, outputs geographic location information, topographic map, electric parameters, operation condition, environment parameters and intuitive video information of distributed power distribution rooms, and performs organic integration so as to achieve all-round monitoring on the power distribution rooms. The cloud server cloud-stores all the information and applies the information to cloud sharing, multi-terminal control, data backup, and other network applications. Thus, the system is made networked and intelligent.
Owner:STATE GRID CORP OF CHINA +3

Silicon-based optical wave guide temperature sensor based on Mach-Zehnder structure

The invention provides a silicon-based optical wave guide temperature sensor based on a Mach-Zehnder structure, realizing temperature sensing by utilizing the sensitivity of a transmission spectrum thereof to temperature. The silicon-based optical wave guide temperature sensor comprises a laser, a Y-shaped wave guide, a first power meter, a Mach-Zehnder wave guide structure and a second power meter, wherein one end of the Y-shaped wave guide is an incident wave guide, a first positive cone is arranged at one end of the incident wave guide and is connected with the laser through optical fibers, the other two ends of the Y-shaped wave guide are respectively a reference arm wave guide and a sensing arm wave guide, a second positive cone is arranged at one end of the reference arm wave guide of the Y-shaped wave guide, and a third positive cone is arranged at one end of the sensing arm wave guide of the Y-shaped wave guide; the first power meter is connected with the second positive cone through optical fibers; the Mach-Zehnder wave guide structure is connected in the middle of the sensing arm wave guide; and the second power meter is connected with the third positive cone of the sensing arm wave guide through optical fibers.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI

Pasty propellant fuel gas generator ignition device based on solid rocket engine

InactiveCN105003357AMature technologyEasy ignitionRocket engine plantsSpark-ignition engineCavity wall
The invention discloses a pasty propellant fuel gas generator ignition device based on a solid rocket engine. The pasty propellant fuel gas generator ignition device comprises a hole plate base, a fuel gas generator combustion chamber and an ignition engine. The two ends of an ignition engine combustion chamber of the ignition engine are fixedly connected with an ignition engine rear base and an ignition engine front cone respectively. An ignition powder column is arranged in the ignition engine combustion chamber. A powder baffle is arranged at the end, close to the ignition engine rear base, of the ignition powder column, and a powder fixing plate is arranged at the other end of the ignition powder column. A powder fixing plate locating base and an ignition powder box are arranged between the powder fixing plate and the ignition engine front cone. Inclined fuel gas nozzles are evenly distributed on the cavity wall between the powder baffle and the ignition engine rear base. The ignition engine and the end face of the hole plate base are coaxially and fixedly connected. The hole plate base is fixed to the propellant inlet end of the fuel gas generator combustion chamber. The ignition engine is located in the fuel gas generator combustion chamber. The pasty propellant fuel gas generator ignition device is simple in structure, simple and reliable in ignition mode and good in ignition effect, and pasty propellant can be fully ignited.
Owner:NANJING UNIV OF SCI & TECH

On-line spreading rate and uniformity detecting device and method for reconstituted tobacco

The invention discloses an on-line spreading rate and uniformity detecting device and an on-line spreading rate and uniformity detecting method for reconstituted tobacco. The detecting device comprises a near-infrared moister meter detecting module, a mechanical movement scanning and examining device, reconstituted tobacco flake conveying devices, a main control center and a signal receiving-transmitting receive. A near-infrared spectroscopic detection principle is adopted; a data processing and analysis algorithm is combined; the on-line quick detection of the spreading rate and the uniformity of the reconstituted tobacco is realized. By using the on-line spreading rate and uniformity detecting device and the on-line spreading rate and uniformity detecting method for the reconstituted tobacco, which are provided by the invention, the real-time on-line detection is carried out on the spreading rate and the uniformity of the reconstituted tobacco in a production process; information can be fed back when a detection result does not accord with a production requirement on the uniformity, so as to be convenient for timely adjustment and control; the detection speed is quick; the precision is high; the stability is good; the repeated calibration is not needed.
Owner:QUANZHOU INST OF EQUIP MFG

Method for measuring and calculating drift angle and deflection of single crystal plane

The invention discloses a method for measuring and calculating a drift angle and deflection of a single crystal plane, and belongs to the technical field of oriented detection on a single crystal material. The prior art needs repeated drift angle orientation on crystals. The method comprises the following steps of 1, measuring diffraction angles of any three points on the same plane of a crystal plane to be measured by an X-ray crystal orientation instrument and marking positions of the measured three points, 2, joining the three points to form a triangle, measuring length of sides of the triangle and calculating interior angles, 3, building a space rectangular coordinate system, 4, building an equation set of known quantity and unknown quantity based on the space rectangular coordinate system, calculating coordinates of the three points and their projection points, and calculating normal vectors of the crystal plane to be measured and an ideal crystal plane, 5, calculating a drift angle of the measured crystal plane relatively to the ideal crystal plane according to a crystal system crystal-plane included-angle formula, and calculating deflection of the measured crystal plane relatively to the ideal crystal plane according to a space two-direction vector included-angle formula, and 6, adjusting a crystal cutting direction according to the drift angle and the deflection, and carrying out one-step cutting to obtain a crystal plane according with crystal orientation.
Owner:CHANGCHUN UNIV OF SCI & TECH

Method for preparing organic field effect transistor dielectric layer by using plasma crosslinking technology

The invention belongs to the technical field of organic electronic devices, and particularly relates to a method for preparing an organic field effect transistor dielectric layer by using a plasma crosslinking technology. Firstly a gate or a gate and an insulating layer are prepared on a substrate. And then monomer which can be polymerized is activated by the plasma through a plasma enhanced chemical vapor deposition (PECVD) method, and a compact, ultrathin and crosslinking organic matter dielectric layer grows on the gate or the dielectric layer. A semiconductor layer is then prepared on a thin film. Finally a source electrode and a drain electrode are made. The PECVD method is used to achieve mutual crosslinking of organic materials and further the compact and ultrathin dielectric layer with high insulation is prepared. The method is simple and convenient. Flexible electronic devices made of the full organic materials can be realized, and the problem that inorganic materials can not bend is overcome. The thin film with high crosslinking has good insulating property. The preparation of the ultrathin dielectric layer required by the flexible electronic devices can be achieved. Meanwhile the organic materials are not dissolved in general organic solvents, and a full solution method for preparing an organic field effect transistor can be realized.
Owner:FUDAN UNIV

Method for improving crude oil recovery ratio by using guanidine gum fracturing backflow liquid

The invention belongs to the technical field of tertiary oil recovery, and in particular, relates to a method for improving a crude oil recovery ratio by using guanidine gum fracturing backflow liquid. The method specifically comprises the following steps that pH of the fracturing backflow liquid is adjusted to 6.5-7.5; then, suspension impurities with particle sizes not less than 50 microns are removed through two-grade filtration; the content of guanidine gum in the fracturing backflow liquid is adjusted to reach the mass concentration of 1.0-1.5%; a nitrogen source and a phosphorus source are synchronously added; the mass concentrations of the nitrogen source and the phosphorus source are respectively 0.2-0.5% and 0.1-0.3% after adding; the fracturing backflow liquid added with the nitrogen source and the phosphorous source is injected in an oil reservoir from a water injection well; and injection allocation of air is performed. The method has the characteristics of simple flows, mature processing unit process, stable whole process and low cost, can realize the reinjection of the fracturing backflow liquid into the oil reservoir, realizes the resource utilization of sewage, and can be widely applied to field tests of improving the crude oil recovery ratio by microorganisms.
Owner:CHINA PETROLEUM & CHEM CORP +1
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