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47 results about "Conducting zone" patented technology

The conducting zone of the respiratory system is made up of the nose, pharynx, larynx, trachea, bronchi, bronchioles, and terminal bronchioles; their function is to filter, warm, and moisten air and conduct it into the lungs. It consists of a series of interconnecting cavities and tubes both outside and within the lungs. It is composed of the 1st through the 16th division of the respiratory tract. The conducting zone is thus most of the respiratory tract; it is the portion of the airway that conducts gases, but excludes the portion that exchanges gases. Thus, conducting zone + respiratory zone = respiratory tract

Track planning method of turning curved surface zone having equal scallop-height into cutter processing

ActiveCN107562013AHigh-precision and efficient processingReduce the knife markNumerical controlPoint boundaryEngineering
The invention discloses a track planning method of turning curved surface zone having equal scallop-height into a cutter processing, which belongs to the technical field of highly-precise and highly-efficient milling and processing of complicated curved surface parts. The track planning method of turning curved surface zone having equal scallop-height into a cutter processing comprises the steps of conducting zone partitioning on the curved surface based on the geometric features and processing requirement of the curved surface; determining the boundary of adjacent processing zones; conductingthe initial plan of equal scallop-height processing track on different processing zones. Through analyzing the geometric features of boundary, the geodesic radius of curvature and the cutter space along the space direction can be calculated, and the cutter contact point and cutter position point corresponding to any points on the boundary of adjacent processing zones can be resolved. The cutter position points form the cutter point boundary through interpolation and fitting. The invention is advantageous in that planning can be conducted with the cutter position point being the constraint, and it can be guaranteed that the cutter position point falls in the cutter position point boundary and on the boundary; the cutter position point can be adjusted, so that the error brought by planningcan be homogenized; the method is suitable for turning the complicated curved surface into cutter processing, and gear mark can be reduced, and processing quality can be improved.
Owner:DALIAN UNIV OF TECH

Scanning method for material increase manufacturing three-dimensional body

The invention discloses a scanning method for a material increase manufacturing three-dimensional body. The scanning method includes the steps that a certain value is set to serve as a three-dimensional body surface layer zone threshold value; then the whole three-dimensional body is divided into a surface layer zone and an internal zone according to the threshold value; small light spot heat source scanning is adopted on the surface layer zone, and large light spot heat source scanning is adopted on the internal zone; and scanning is completed. By means of the scanning method, a user can freely set the surface layer zone thickness threshold value according to the machining requirement, a single-deck section to-be-scanned zone of the three-dimensional body is divided into the surface layer zone and the internal zone, different scanning parameters are further adopted to conduct zone dividing scanning on the surface layer zone and the internal zone, the machining accuracy of the three-dimensional body is guaranteed, and the scanning machining efficiency of the three-dimensional body is improved. The user can further take a scanning strategy that scanning machining of the internal zone is carried out one time after the multi-layer surface layer zone is scanned according to the machining requirement, and the machining accuracy and the machining efficiency are balanced to the maximum degree.
Owner:XIAN BRIGHT ADDTIVE TECH CO LTD

Roof water draining method based on directional drilling technique

ActiveCN106285776AIncrease water richness detectionIncrease the lengthDirectional drillingDrainageCoalGroundwater
A roof water draining method based on a directional drilling technique comprises the steps that (1) according to the specific field of drilled holes, a water-rich detection area of a roof of a coal seam is determined; (2) according to the largest development height of a water conducted zone after the coal seam is mined as well as the water-rich detection area, determined in the step (1), of the roof of the coal seam, a target area of directional drilling in the space is determined, and a coal seam roof water draining directional drilled hole (1) is formed in the target area; (3) directional drilling is conducted through a resistivity measuring probe, in the directional drilling process, if the resistivity is reduced, water draining measures are taken, and if the resistivity does not change obviously, measurement is continued; (4) the flow speed and flow direction of underground water of the water-rich area are measured with the roof water draining area in the step (3) as the initial point; (5) according to the flow speed and flow direction, measured in the step (4), of the underground water of the water-rich area, the directional drilling direction is adjusted, and directional drilling is continued; and (6) the steps (3)-(5) are repeatedly conducted, and roof water draining of a whole recovery area is completed.
Owner:SHAANXI COAL & CHEM TECH INST

Method for distinguishing ultra-close coal seam/group

The invention discloses a method for distinguishing an ultra-close coal seam/group. The method includes the steps of obtaining geographic information of related coal seams according to mine practical surveys; taking a lower coal seam as a single coal seam according to obtained parameters of the related coal seams and calculating the heights of caving zones of the coal seams according to formulas provided by related rules; choosing different calculation methods of comprehensive mining thicknesses according to ratios; according to the comprehensive mining thicknesses obtained through calculation, choosing an appropriate calculation formula of water conducted zone heights in combination with practical geographic conditions of a mine, and therefore calculating the water conducted zone heights of two coal seams. The method provides applicable conditions of the calculation formula of the water conducted zone heights of the ultra-close coal seam when the height of the caving zone of the lower coal seam enters a mining range of an upper coal seam, reflects the quantitative relation of the mining thickness of the upper coal seam, the mining thickness of the lower coal seam and vertical distances of the coal seams, and provides bases and reference for choices of calculation methods of the ultra-close coal seam and the water conducted zone of the ultra-close coal seam.
Owner:SHANDONG UNIV OF SCI & TECH

Repairing method for split sealing surface of pressure resistant vessel

ActiveCN105345390ARepair deformationEliminate gapsRepair methodBolt connection
The invention discloses a repairing method for a split sealing surface of a pressure resistant vessel. The pressure resistant vessel mainly comprises an upper half cylinder and a lower half cylinder, which are connected together by a fastening bolt; and the split sealing surface is formed between the upper half cylinder and the lower half cylinder. The repairing method comprises the following steps: (1) checking the gap of the split sealing surfaces between the upper half cylinder and the lower half cylinder, and completing the record; (2) taking the sealing surface of the upper half cylinder as the standard; determining a surfacing zone on the sealing surface of the lower half cylinder and the corresponding surfacing thickness according to the checked data; (3) cleaning the surfacing zone on the sealing surface of the lower half cylinder, conducting the zoned and segmented surfacing, and forming a grid-shaped surfacing layer on the sealing surface of the lower half cylinder; (4) polishing the surfacing layer, and reserving a scraping allowance; and (5) conducting zoned scraping to enable the sealing surface of the upper half cylinder and the sealing surface of the lower half cylinder with the surfacing layer to form a split sealing surface meeting the design requirement. The repairing method can eliminate the gap between the sealing surfaces of the upper half cylinder and the lower half cylinder reliably to achieve a good sealing effect.
Owner:DONGFANG TURBINE CO LTD

Three-dimensional zoned collaborative caving mining method for pillar groups

The invention discloses a three-dimensional zoned collaborative caving mining method for pillar groups. The method comprises that: taking stability significantly correlated pillar groups in a large and empty environment as a collaborative caving unit, conducting zoning within a three-dimensional solid of the collaborative caving unit, with each zone as a blasting zone with an independent free surface and a compensation space; carrying out blasting for one time to all zones within the caving unit through short-delay blasting or simultaneous blasting between zones to realize collaborative caving; making the blasting directions of all zones form mutual extrusion, with a continuous or discontinuous blasting initiation sequence in space among zones; leaving the blasting initiation sequences and blasting directions of blast holes within different zones mutually uncorrelated. The method of the invention is suitable for collaborative stoping of a plurality of pillars and treatment of multiple empty zones in a big and empty zone environment. The method provided in the invention completes empty zone treatment and pillar stoping in one step, thus providing a safe, efficient, productive and low-cost solution to underground mining of pillar groups in a big and empty zone environment.
Owner:CHINA MINMETALS CHANGSHA MINING RES INST

Method for mine disaster automatic zoning and early warning based on microseismic information

The invention discloses a method for mine disaster automatic zoning and early warning based on microseismic information, and belongs to the technical field of microseismic early warning. The method includes the steps that microseismic data are collected through a microseismic monitoring system, microseismic data include occurrence time information, energy information, coordinate information and magnitude information of a plurality of microseismic events; according to the microseismic data and preset zoning parameters, the microseismic events are subjected to three-dimensional zoning; at everypredetermined time interval, in a set time window, microseismic activity characteristic values, microseismic intensity characteristic values, magnitude frequency distribution characteristics, microseismic activity rate characteristic values, magnitude frequency curve deviation degree indexes and energy release change models of the microseismic events in each zoning are statistically analyzed correspondingly to obtain statistic data to plot, an itemized rating scale and a preset single score threshold or multiple total score threshold are developed to conduct zoning rating and early warning toa target zone. The method for mine disaster automatic zoning and early warning based on the microseismic information achieves the technical effects that safety is improved, operation is convenient, and the early warning effect is improved.
Owner:湖北海震科创技术有限公司 +2

Multi-cavity plasma generator anode

The invention provides a multi-cavity plasma generator anode, which comprises a compression cavity, a stable combustion cavity, a conduction flow cavity and an accelerating cavity, which are connected in succession; the compression cavity is used to compress plasmas generated by a cathode; the stable combustion cavity can meet the requirement of plasma expansion; the conduction flow cavity provides a good electrically conductive path for conduction electrons; the accelerating cavity is a double-parabola structure formed by an upper-open parabola and a lower-open parabola; and the compression section is used to compress plasmas and improve plasma density, and the accelerating section is used to reduce the resistance of plasmas jetting form the leading end of the anode and increase plasma jetting velocity. The multi-cavity plasma generator anode provided by the invention is different from the traditional plasma generator anode, which adopts a first-compression-and-then-expansion type nozzle. In the invention, a unique multi-cavity anode construction is designed according to the expansion property of plasmas, and therefore the shortcoming of the traditional anode that the anode life is shortened due to too fast ablation rate resulting from the overlap of a conducting zone and an electric arc combustion zone is overcome.
Owner:WUHAN TIANHE TECH
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