181 results about "Double curve" patented technology

The invention discloses a large double-curve steel structure cooling tower for a power plant. The large double-curve steel structure cooling tower comprises linear inclined vertical columns, intersected nodes and reinforcing rings, wherein a steel structure cooling tower framework consists of a vertical line rotary array formed by encircling the linear inclined vertical columns around an upper circle center and a lower circle center of the tower; intersected positions of the linear inclined vertical columns are the nodes; and along the height direction of the tower, 3 to 5 reinforcing rings are required to be arranged. The tower is over 150 meters high, and the diameter of the lower part of the tower is about 150 meters. The large double-curve steel structure cooling tower is a novel steel structure cooling tower replacing a concrete thin-shell double-curve cooling tower, is suitable for indirect cooling units with the capacities of 125 MW or over 125 MW, can be applied to those extremely cold places in which the concrete cooling tower cannot be used, and has the characteristics of low gravity, high construction speed, simple foundation treatment operation, low comprehensive manufacturing cost, high anti-seismic and anti-wind performance, low post-maintenance cost and the like.

The invention discloses a manufacture method for double-curve H-shaped steel. The manufacture method comprises the following steps of: 1) reviewing the material quality of a supplied horizontal plate, flattening the horizontal plate, and pre-processing; 2) three-dimensional lofting by a computer, and spreading in a plane; 3) cutting and blanking on a numeric control cutting machine; 4) opening a groove on an H-shaped steel web, and carrying out the butt welding; 5) marking a bending line and an assembly line on the web and a flange plate; 6) manufacturing a bending jig frame according to three-dimensional coordinates; 7) bending the web and the flange plate via the method of flame rectification assisting cold bending formation; 8) manufacturing a assembly jig frame; 9) combining position welding and spot-welding on an upper flange plate and a lower flange plate respectively assembled on an assembly jig frame group; 10) welding the soldering seam between the web and the lower flange plate; 11) lifting the component from the jig frame, and turning over the component to weld the soldering seam between the web and the upper flange plate; and 12) returning the jig for a repeated inspection, and carrying out the three-dimensional coordinates detection through a total-station instrument. According to the manufacture method, used equipment is simple, and efficiencies on manufacture and production are improved.

An aspect of various embodiments of the present invention system and method provide, but not limited thereto, a novel means for epicardial ablation using a double-curve steerable sheath and a double-curve deflectable open irrigated-tip/suction catheter that can be guided around the apex of the heart and adjusted so as to position the distal tip optimally. The catheter can also both deliver fluid to and withdraw fluid from the pericardial space. Access to the epicardial surface of the heart is via a subxiphoid entry. The method and means presented include, but are not limited to, steering, energy delivery, bipolar mapping, placement and use of electrodes, irrigation, suction of irrigation fluid, and other details of the subject invention.

The invention discloses a laser radar receiving system, which is characterized in that a cassegrain telescope, a subsequent receiving optical unit and a visual field angle adaptive adjusting program are arranged, wherein the focal plane of the cassegrain telescope is positioned between a primary mirror and a secondary mirror; the laser radar subsequent receiving optical unit is arranged in the cassegrain telescope; the aperture of a small-hole diaphragm can be controlled by the visual field angle adaptive adjusting program, so that adaptive adjustment of a visual field angle of the telescope is realized; an output lens seat with a diameter of 52 mm is designed on a supporting cross arm of the telescope; the central line of the lens seat is coaxial with the central axis of the telescope; and the included angle of the normal line of the lens seat and the central axis of the telescope is 45 degrees. The echo signal lights with different detection wavelengths are focused at the center of the small-hole diaphragm through the parabolic primary mirror and the double-curve secondary mirror, and the shaped quasi-parallel signal lights enter the subsequent detection system.

This invention relates to a kind of overall view vision system based on hyperboloid mirrorscope, overall view mirrorscope and overall view connector compose overall view finder module, the zoom lens connector and the zoom lens compose the zoom lens module, the upper part of the glass protecting cover is blocked in the flute of the overall view finder connector, the down part is blocked in the flute zoom lens connector, to make both the overall view mirrorscope and the zoom lens are put in the glass protecting cover, the finder telecamera links with the zoom lens connector. The centre of overall view mirrorscope , zoom lens and telecamera sensor are in the same straight line , it has ascertained optical imaging focal point of the overall view system; the said overall view mirrorscope is hyperboloid structure , the reflection focal which the hyperboloid point corresponded and the optical imaging focal point of the overall view system coincide. The overall view mirrorscope in the invention adopts the hyperboloid structure, it can satisfy the range demand of wide angles finder of the system, the module combination method is easy to assemble and change, has improved the reliability of the system.

The invention discloses a construction method for a double-curve triangular aluminum plate unit type hanging ceiling, comprising the following steps of: carrying out BIM firstly and confirming an axis, a locating point and a base line; confirming the size of a base control line in each layer; manufacturing the base layer of a steel frame according to the confirmed construction base line, axis and elevation; processing and positioning an auxiliary steel frame, relation-calculating the size of each connection steel frame and carrying out field cutting, positioning and welding; building an all-round scaffold, and assembling and hanging a triangular aluminum plate; calculating the size relation of each veneer and the steel frame; popping out the positioning line of each plate on the auxiliary steel frame from the middle; carrying out size accumulation error recheck by ten plates; popping out a great control line on the steel frame by the theoretical length size of ten plates; adjusting a maximum size of 20mm to install a hanging piece and an adjusting piece; arranging a construction crew to install from downside to upside according to the field condition; installing in different areas synchronously; and finally, installing a flat triangular aluminum plate.

The invention discloses an all-weather active type panoramic sensing device which comprises a mobile object laser light source, a multi-element output all-around visual sensor and a micro processor, wherein a mirror surface with double curved surfaces and two camera units are arranged in the multi-element output all-around visual sensor; a polarization splitting prism is arranged on a refraction and reflection light path of the mirror surface with double curved surfaces is used for splitting the refraction and reflection light of the mirror surface with double curved surfaces into light containing a certain polarized component and light not containing a certain polarized component; the two camera units are respectively positioned on reflection and refraction light paths of the polarization splitting prism, and are used for respectively acquiring a first panoramic video image containing polarized light information and a second panoramic video image containing light intensity information; the micro processor is used for fusing point cloud geometrical information in the first panoramic video image with the color information in the second panoramic video image, and constructing a panoramic 3D model. The invention further discloses a 3D panoramic modeling approach adopting the all-weather active type panoramic sensing device.

The invention discloses a nucleic acid extraction device capable of preventing cross-contamination. The device comprises a motor, a motor control circuit, a stirring sleeve frame which is driven by the motor, stirring sleeves which are arranged on the stirring sleeve frame, and sampling boards, wherein guide grooves are formed on the stirring sleeve frame; each stirring sleeve is provided with a connecting part, and stirring sleeve feet which are formed by extending from the connecting part; the bottom of each stirring sleeve foot has a rotary double-leaf double-curved-surface structure; each stirring sleeve is in clamping fit with the guide grooves of the stirring sleeve frame through curve-shaped guide rails which are arranged on two sides of the connecting part; and the motor control circuit controls the motion of the motor according to input parameters of sample information and further controls the motion track of the stirring sleeves in deep holes of the sampling boards. The nucleic acid extraction device effectively prevents the cross-contamination caused by the mutual influence of aerosol and liquid droplets among samples in the automatic nucleic acid extraction process, and ensures that nucleic acid extraction results are accurate and reliable.

The invention relates to a turbine blade profile line design method. The method includes the following steps that an appropriate elliptic arc or a circular arc is selected according to a new secondary curve expression; after the appropriate geometric curve is selected, some relational expressions of determined control parameters are built by the adoption of a good blade profile which has passed the intensity and aerodynamic performance test, so that the relational expressions include the factors of the strength and aerodynamic performance naturally, the newly-formed blade profile cannot deviate from the good aerodynamic performance and intensity performance; in the aerodynamic performance and intensity calculation process, some reliable empirical formulas are referenced. The turbine blade profile line design method has the advantages that the appropriate elliptic arc, the parabolic arc and the double-curve arc can be selected for the new secondary curve expression to express the required curve segment, and the expression is further provided with the elastic spline feature, the secondary curve affine transformation feature is reflected, any stretching, compression and bending can be conducted, and thus the curve is modified conveniently to adapt to the requirements of aerodynamic performance and intensity calculation.

The invention discloses a three-dimensional slope stability prediction method based on sliding displacement analysis. The method includes the steps that a specific sliding mass to be predicated is selected; discretization is conducted on the three-dimensional sliding mass; a double-curve model of a rock and earth mass is established, and the relation between the shearing force of the bottom surface of a stripped-shaped column and key point vertical displacement delta0 is obtained; the key point vertical displacement delta0 corresponding to different reduction coefficients RF is solved. The value of the reduction coefficient RF corresponding to a spurt position of key point vertical displacement delta0 is selected to be used as a stability coefficient of a three-dimensional slope. The three-dimensional slope stability prediction method based on sliding displacement analysis has the advantages that the sliding displacement information of the slope is considered, the calculation accuracy is improved, and the prediction result is more reliable.

The invention discloses a metal plate double-curved-surface processing technology and metal plate double-curved-surface processing equipment. The technology comprises the following steps of rolling a metal plate to be processed by using a triaxial roll bending machine, and adjusting the distance among three rollers to obtain different unidirectional curvatures, wherein convex and concave shaft sleeves are sleeved on three rollers of the roll bending machine; and allowing the metal plate to be processed to pass through the roll bending machine sleeved with convex and concave shaft sleeves to obtain a double-curved-surface plate which has a required shape. In the technology, the shaft sleeves are coated by a strip, the axial curvatures of the shaft sleeves are adjusted, and the resilience capacity of the metal plate is adjusted in a matched way. The double-curved-surface roll bending machine is provided with three rollers and is sleeved with the convex and concave shaft sleeves of which the curvatures are matched. The double-curved-surface processing technology and the metal plate double-curved-surface processing equipment have the ingenious conception, so that the tradition that the roll bending machine can only finish the roll bending production of a single-curved-surface plate is changed; therefore, double-curved-surface one-time rolling forming of the metal plate is efficiently and conveniently finished, the resilience capacity can be adjusted easily and conveniently, the accuracy is high, the production efficiency is greatly improved, and the production cost is reduced.

The invention discloses a Cassegrain type metamaterial antenna, comprising a metamaterial main reflector with a central through hole, a feed source arranged in the central through hole and a metamaterial secondary reflector arranged in front of the feed source, wherein electromagnetic waves radiated by the feed source are emitted out in a plane wave manner after being sequentially reflected by the metamaterial secondary reflector and the metamaterial main reflector; the metamaterial secondary reflector has the electromagnetic wave reflection property which is similar with that of rotary double-blade double curve surfaces; the metamaterial secondary reflector is provided with a near focus and a far focus; the far focus is overlapped with the center of a phase of the feed source; and the near focus is overlapped with the focus of the metamaterial main reflector. According to the Cassegrain type metamaterial antenna disclosed by the invention, the sheet-shaped metamaterial main reflector replaces a traditional paraboloid; and the manufacturing and the machining are easier and the cost is lower.

The invention provides a building method of an optimization and regulation model of a facility CO2 target value of fusion efficiency aiming at the problem that the production efficiency is low since amulti-factor coupling CO2 target value regulation model of a facility environment regulation system is lack of research and fusion regulation efficiency. Through a multi-factor coupling embedding test with illumination strength, the environment temperature and the CO2 concentration being variables, a photosynthesis data sample of tomato seedlings is obtained, a CO2 response right angle double-curve correction model is built, through a curve curvature theory, a CO2 limiting upper limit CO2 value at different temperatures and different light intensities is obtained, and with the CO2 limiting upper limit CO2 value being a regulation target value, fitting is conducted to obtain a tomato seedling CO2 environment regulation model of the fusion efficiency constraint at different temperatures anddifferent light intensities. By means of the model, compared with a traditional model with the maximum photosynthesis speed point being the regulation target value, the photosynthesis speed is lowered by only 7.27% on average, the needed CO2 amount is lowered by 37.55% on average, the basic theoretical problem of efficient facility crop environment regulation can be solved, and the model has guidance significance on actual facility environment factor regulation.

The present invention belongs to the field of glass forming and toughening technology. The making process of toughened glass with double curved surface includes: setting plate glass into the double-curve forming mold in L-shaped bogie, lifting with a lifting mechanism from the loading and unloading area A to pushing area B and pushing into hot bending area C, hot bending to form in C, pushing the L-shaped bogie to pass through upper turnover area D to wind cooling area E, wind cooling to toughen in area E between the upper and lower wind grates, backing to area D and descending to lower turnover area F, and backing to area A for unloading via the passage G under area C. Then, the next circulation begins. The said process is reasonable, power saving, high in finished product rate and suitable for continuous production, and the toughened glass has good optical performance.

A stop block for preventing over travel of an adjustable fifth wheel hitch assemblies comprising a generally rectangular solid member having a double curve disposed in said member such that a long portion of said member is higher in elevation than a short portion of said member.

The invention provides a method and a device for realizing time varying spectrum simulation deconvolution. The method disclosed by the invention comprises steps of performing time frequency transformation processing on earthquake recording to obtain time frequency domain earthquake data, performing band limitation variable step length double curve smoothing processing on amplitude spectrum of the time frequency domain earthquake data to obtain a smoothened time frequency domain earthquake data amplitude spectrum, performing time averaging on the product of the amplitude spectrum of time frequency domain earthquake data and the smoothened time frequency domain earthquake data amplitude spectrum to obtain an wavelet simulation amplitude spectrum, utilizing the wavelet simulation amplitude spectrum and the smoothened time frequency domain earthquake data amplitude spectrum to determine a frequency domain time variable spectrum simulation deconvolution operator, multiplying frequency time domain variable spectrum simulation deconvolution operator with the time frequency domain earthquake data to obtain the earthquake data which has gone through the time frequency domain deconvolution and performing reverse time-frequency transformation on the earthquake data after the time frequency domain deconvolution to obtain the earthquake data after the variable spectrum simulation deconvolution.

The invention relates to an oval multi-curvature head lamellae pressing-molding die, which is characterized in that the die adopts an integrally assembled structure and consists of four sets of dies;each set of dies comprises an upper die and a lower die; the upper die consists of an upper template, an upper die-body sub-module and an upper-die double-curved-surface module in turn from top to bottom; the lower die consists of a lower template, a lower die-body sub-module and a lower-die double-curved-surface module in turn from bottom to top; every component of the upper die and the lower dieconsists of uniformly distributed sub-blocks respectively; and the sub-blocks of every component of the upper die and the lower die are positioned through square keys and fixed through high-strengthbolts. The die has the advantages that: 1, as the die adopts a building-block type assembly structure, the sub-modules forming the die are convenient to process, install and detach; 2, adjacent double-curved-surface shaping modules are connected through U-shaped jamming blocks, so the die is high in overall stiffness; 3, heat-resistant embedded lumps are arranged between the double-curved-surfacemodules, so the die is long in lifespan; and 4, when the die is partially damaged, replacement cost is low.

An aspect of various embodiments of the present invention system and method provide, but not limited thereto, a novel means for epicardial ablation using a double-curve steerable sheath and a double-curve deflectable open irrigated-tip/suction catheter that can be guided around the apex of the heart and adjusted so as to position the distal tip optimally. The catheter can also both deliver fluid to and withdraw fluid from the pericardial space. Access to the epicardial surface of the heart is via a subxiphoid entry. The method and means presented include, but are not limited to, steering, energy delivery, bipolar mapping, placement and use of electrodes, irrigation, suction of irrigation fluid, and other details of the subject invention.

The invention discloses a numerical control double-curve groove cutting machine, which comprises an underframe, a gantry, two servo rotating motors, and two rotating spindle, wherein the gantry comprises two endframes and a crossbeam crossing the endframes; the two endframes can be arranged on the underframe in a mode of moving back and forth; the crossbeam is provided with two groove cutting devices; output shafts of the servo rotating motors are respectively connected with an input shaft of a reducer casing; output shafts of two reducers casings are provided with an output gear respectively; the rotating spindles are respectively positioned above a connecting frame of the two groove cutting devices, and are provided with rotating gears meshed with output gears; and lower ends of the tworotating spindles are connected with the groove cutting devices. The numerical control hyperbolic groove cutting machine greatly improves the cutting production efficiency, reduces labor intensity, ensures high workpiece cutting precision and surface quality, and simultaneously cut double curve grooves to solve the problem of thermal deformation of a plate due to flame cutting.

The invention discloses a conical curve drawing device which can draw parabolas, ellipses and hyperbolas. When conical curve drawing is needed, the angle between an L-shaped mechanism and a base guide rail is set first according to the eccentricity of a conical curve, the acute angle between the base guide rail and an x guide rail is set to be theta, the base guide rail is fixed, and focal points are fixed; the L-shaped mechanism is pushed along the base guide rail, a rack 2 fixed with an x slider move a distance of delta y in the direction of a y guide rail, the distance of delta y is transmitted to a rack 1 through a gear, and the length of delta y is increased by the distance between a pencil to the focal points; a straight rod fixed with a y slider moves a distance of delta x in the direction of the x guide rail, that is to say, the length of delta x is increased by the distance between the pencil to the directrix of the drawn conical curve; due to the fact delta y/delta x=tan theta is of a certain value, ratio of the distance from the pencil to the focal points to the distance from the pencil to the directrix of the drawn conical curve is constant and equal to tan theta, conformation to the definition of the double curve is achieved, and drawing of the parabolas, the ellipses and the hyperbolas is achieved.

The invention relates to a vertical injection molding machine which is characterized by comprising a control system adopting automatic control, a hydraulic system adopting a hydraulic integrated block, a feeding mechanism which is controlled by a microcomputer and automatically measures the feeding quantity, a glue ejecting mechanism provided with an energy storage punching system, a die assembly with water circulation cooling and a die closing device which adopts a five-hinging point double-curve connecting rod mechanism to control the die assembly to open, combine and lock a die. The vertical injection molding machine has the characteristics of being low in manufacturing cost, high in automation degree, high in working efficiency, large in die locking capability, good in cooling effect, high in part durability, and low in noise, and being safe, reliable, and energy-saving.

The invention discloses a double-layer wet-cooling tower with partitioning walls. The double-layer wet-cooling tower comprises an inner-layer tower drum and an outer-layer tower drum, wherein the inner-layer tower drum and the outer-layer tower drum are coaxial, the inner parts and the outer parts of the inner-layer tower drum and the outer-layer tower drum are embedded and the bottoms of the inner-layer tower drum and the outer-layer tower drum are level; the bottoms of the inner-layer tower drum and the outer-layer tower drum are respectively fixed on a same mechanical frame; the outer-layer tower drum is a double-curve type cooling tower; the inner-layer tower drum is a cylindrical cooling tower and is higher than the outer-layer tower drum; the lower side of the area between the outer-layer tower drum and the inner-layer tower drum is provided with a filler area and a rain area which are ring-shaped; and the rain area is arranged under the filler area; the partitioning walls are distributed between the inner-layer tower drum and the outer-layer tower drum. The double-layer wet-cooling tower disclosed by the invention has the beneficial effects that since part of fresh air is directly introduced to the central area of the ring-shaped cooling tower, so that the cooling efficiency can be greatly improved; the influence of side wind on the working performance of the wet-cooling tower can be effectively prevented; under the condition of extremely-cold weather, heat load of the filler area in each sector-shaped ring can be maintained to be above critical icing heat load, so that fillers are prevented from being frozen, and the replacement and the maintenance of the fillers of the cooling tower without stoppage can be realized.