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1431results about How to "Wide range of applications" patented technology

Small current grounding system single phase earth fault traveling wave line selection and distance measurement apparatus

InactiveCN102221662AWide range of applicationsAccurately measure distance to fault
The invention provides a small current grounding system single phase earth fault traveling wave line selection and distance measurement apparatus which comprises a signal conversion plate, a high speed acquisition plate and a central management machine. The signal conversion plate converts bus zero sequence voltage and line current to 0 to 10 volts voltage signal after isolation. The high speed acquisition plate connecting with the signal conversion plate finishes the conversion from analog signal to digital signal, carries out high speed acquisition and caching, receives a synchronization time setting signal simultaneously, and marks data with absolute marker. A digital signal processor (DSP) of the high speed acquisition plate calculates whether the zero sequence voltage exceeds a starting set value or not, wherein, if so, line fault happens. The DSP automatically searches and calculates a tip size and direction of traveling wave, and outputs line selection result through a switch output plate connecting the high speed acquisition plate. Simultaneously wave recording is started to record fault data which is transmitted to the central management machine through a high speed bus. According to the wave recording data, the central management machine automatically searches initial wave tip of the fault line and time of fault point reflection wave tip, and calculates distance of the fault point. Finally, fault data and fault report are published through a WEB SERVER platform.
Owner:SHENZHEN SUOTU TECH

Nano-paste, self-cleaning coating liquid and thermal insulating coating liquid as well as transparent substrates and preparation methods thereof

The invention discloses a nano-paste, a self-cleaning coating liquid and a thermal insulating coating liquid as well as transparent substrates and preparation methods thereof. The formula of the nano-paste comprises the following components in parts by weight: 5-25 parts of nano-powder, 1-25 parts of wetting agent, 1-25 parts of active dispersant and 10-200 parts of dispersion medium, wherein the nano-powder is a photocatalyst powder or a thermal insulating powder; the solid content of the nano-powder is 5-50wt%; the particle size distribution of particles in the nano-paste is 10-200 nanometers. The self-cleaning coating liquid and the thermal insulating coating liquid are obtained by firstly preparing stable nano-photocatalyst paste and nano-thermal insulating paste and then compounding the stable nano-photocatalyst paste and nano-thermal insulating paste with film forming matters such as inorganic sol and organic resin. The coating liquids can be applied to the surfaces of different transparent substrates by use of a plurality of different construction methods, so that transparent materials having double functions of self-cleaning and thermal insulation can be obtained; as a result, large-scale preparation of multifunctional transparent coated materials, such as multifunctional coated glass, is realized.
Owner:张扬 +2

Deep building pit trussed-beam inner support integral application pre-stress method

The present invention relates to a method for wholly exerting pre-stress to the trussed internal bearing in the deep foundation pitch. The method comprises the following steps: installing an internal bearing which is composed of a principal top brace, a diagonal rod and a web rod or composed of a principal top brace and a web rod, and installing the trussed internal bearing between two pit walls of the deep foundation pitches; (2) installing a pre-stress force-transferring seat along the axial direction of the principal top brace on each principal top brace; (3) arranging a jack along the axial direction between two pre-stress force-transferring seats of each principal top brace; and (4) cutting off the principal top brace between two force-transferring seats of each principal top brace, exerting pre-stress with the jack, and when the pre-stress which should be exerted is obtained, reinforcing and welding the gap which is between the fracture surface of the cut principal top brace and is generated by exerting pre-stress with the steel material. The method has the advantages of quick installation, short time period for exerting pre-stress, being able to counteracting the compressing deformation of the member bar, and being able to quickly and effectively control the deformation in the deep foundation pitch.
Owner:CHINA FIRST METALLURGICAL GROUP

Power distribution network fault location method based on fault indicators

The invention discloses a power distribution network fault location method based on fault indicators. The method comprises several steps as follows: construction of an incidence matrix, sending of state information to a master station control center by the fault indicators, generation of a trigger vector and location of a fault section. An incidence matrix construction unit generates the incidence matrix, the fault indicators send the state information to a master station through a Zigbee wireless network, and a fault location unit generates a trigger vector, performs matrix operation on the trigger vector and the incidence matrix to acquire a fault section vector, analyzes and locates the fault section and diagnoses the fault information. Effective fault location of a power distribution network which has multiple faults and contains distributed power supplies can be realized. When the method is used for locating the faults of the power distribution network, a normalized incidence matrix is not required, and fault location of the complex power distribution network structure with multiple fault points and multiple power supply systems can be realized; the method has certain fault tolerance and is simple in judgment principle, small in calculation amount, stable, reliable, quick and accurate in fault location and low in cost.
Owner:GUANGXI UNIV +1

SCR (Selective Catalytic Reduction) denitrification device for flue gas of glass kiln

InactiveCN103007743AWide range of applicationsDenitrification effect saving
The invention discloses an SCR (Selective Catalytic Reduction) denitrification device for flue gas of a glass kiln. The SCR denitrification device comprises waste heat boilers and a denitrification reactor, a gas inlet end of the ammonia process SCR denitrification reactor is communicated with the first waste heat boiler to receive flue gas which is cooled to 320-420 DEG C through heat exchange, and a gas outlet end of the SCR denitrification reactor is communicated with the second waste heat boiler and discharges the denitrified flue gas into a chimney after the denitrified flue gas is cooled to 150-170 DEG C through heat exchange; and the denitrification reactor comprises an ammonia injection grid, an ammonia-flue gas mixer, a rectifier, and a multilayer catalyst bed and a soot blowers thereof, which are arranged in a flue gas channel in sequence. The SCR denitrification device is wide in application range, does not influence the power generation of the waste heat boilers, and realizes the waste heat utilization and denitrification; regulating valves are arranged in all links of the whole system so as to ensure the denitrification effect and save the ammonia usage amount; and the sooth blowers of the reactor adopts steam blowing, the pressure is precisely controlled, the steam of the waste heat boilers arranged in a matching can be fully utilized; and an openable door arranged at a position where the denitrification system is connected with the waste heat boilers can ensure that the waste heat boilers can independently or simultaneously operate.
Owner:CHENGDU DONGFANG KWH ENVIRONMENTAL PROTECTION CATALYSTS +1

Portable multifunctional soil mechanical property test device

The invention relates to a portable multifunctional soil mechanical property test device. The portable multifunctional soil mechanical property test device comprises an upper rigid beam, a lower rigid beam, a rigid threaded column, an upper stress application mechanism, a lower stress application mechanism, a water tank, a test tank, a measuring mechanism and an infiltration mechanism, wherein the middle part of the lower rigid beam is provided with the lower stress application mechanism, the lower stress application mechanism is provided with the water tank, the test tank is arranged in the water tank, the upper rigid beam is arranged on the lower rigid beam in an up-down moving manner through the rigid threaded column, an inner screw hole is formed in the middle of the upper rigid beam, the upper stress application mechanism passes through the inner screw hole and is connected with the test tank through the measuring mechanism, and the test tank is communicated with the infiltration mechanism through a water guide pipe. Compared with the prior art, the portable multifunctional soil mechanical property test device is simple in structure, convenient to carry and easy to operate; soil tests can be conveniently carried out in an engineering field, the test error can be effectively reduced, the working efficiency is high, the practicability is high, and the application range is wide.
Owner:TONGJI UNIV

Radial extruding forming device of cut-fiber reinforcement rubber composite material

ActiveCN101337435AWide range of applicationsUniform product
The invention relates to a radial extrusion molding device for the composite material of short fiber reinforced rubber, in particular to a device for realizing the radial direction of short fiber in rubber material. Eight threaded holes are produced on the front side of the flange of the device, eight double threaded screws and nuts are used for connecting the flange, a flow channel plate, a blocking supporting plate, a shaping plate and a machine head pressing plate into a whole in sequence, a rubber overflow valve is installed above the flange, and a threaded hole is drilled under the flange to install a pressure sensor; a pair of blocking adjusting blocks is positioned in the middle of the blocking supporting plate, one end of a blocking adjusting bolt is fixed with the blocking adjusting blocks, the other end thereof is connected with the blocking supporting plate through thread, and the blocking adjusting bolt is used for controlling the blocking gap; a pair of shaping adjusting blocks is positioned in the middle of the shaping plate to adjust the shaping gap, the shaping adjusting blocks are clamped between the blocking supporting plate and the machine head pressing plate and fixed through screws. The device has the advantages of simple structure, reliable principle, broad application range, low cost, good production efficiency, high product quality and stable performance.
Owner:QINGDAO UNIV OF SCI & TECH

Beam-forming method for forming array antenna of variable beam

ActiveCN102110883ARadiation Efficiency OptimizationWide range of applications
The invention discloses a beam-forming method for forming an array antenna of a variable beam, which comprises the following steps of: (1) dividing a target beam into fixed beams and movable beams in shape according to the requirement of the target beam; (2) dividing all array elements of an array into n sub-arrays according to the number of the fixed beams and the number of the movable beams; (3) obtaining gain directional diagrams to be implemented by the sub-arrays by optimizing the layout of the sub-arrays and all unit amplitude phases in the sub-arrays under the environment of the whole arrays; (4) calculating phase directional diagrams of the respective sub-arrays, namely functions of phases varying along an angle of pitch Theta and an azimuth angle, under the environment of the whole arrays, and normalizing the phase directional diagrams of the respective sub-arrays to make the respective sub-arrays same-phase in pointing angles of the movable beams; and (5) determining weights of the respective sub-arrays according to a gain value of the target beam and the gain values of the respective sub-arrays obtained in the step (3), performing linear synthesis on the gain directional diagrams of the all sub-arrays by using the weights, and adjusting the weights of the respective sub-arrays to achieve an effect of forming as required.
Owner:XIAN INSTITUE OF SPACE RADIO TECH

Zero-sewage discharge novel process for development of natural gas fields

The invention discloses a zero-sewage discharge novel process for development of natural gas fields. The zero-sewage discharge novel process comprises the following steps of: classifying sewage in a gas field into normal production sewage, domestic sewage, overhauling sewage, accident waste liquid, rainwater, production wastewater and gas field water, and collecting separately; next, guiding the normal production sewage, domestic sewage, overhauling sewage, accident waste liquid and initial rainwater to a biochemical treatment unit, guiding the production wastewater to an electrodialysis treatment unit and guiding the gas field water to a gas field water pretreatment unit; guiding all of up-to-standard sewage which is treated by the biochemical treatment unit previously and not completely recycled, concentrate generated after the treatment of the electrodialysis treatment unit and the gas field water treated by the gas field water pretreatment unit to an evaporative crystallization unit for advanced treatment; and after the quality of the water is up to the standard, recycling the water as make-up water for circulating cooling water or water for other production in the gas field, and separating out pollutants from the sewage in the form of crystalline salts, backfilling or recycling the crystalline salts, and finally, realizing zero discharge of the sewage.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
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