145results about How to "The principle is novel" patented technology

The invention discloses a precise seeds sowing device for growing seedlings of an aperture disk, which comprises a seeds box, an outlet aperture adjuster, a curtain flow stabilizing plate, a seeds sowing bracket, a pneumatic distribution system and a pneumatic adjustment system; and the outlet aperture adjuster is used for adjusting the size of an outlet of the seeds box, and the seeds are distributed by means of single seed, are orderly arranged and are basically even in density under the action of the curtain flow stabilizing plate after the seeds are flowed out. The pneumatic adjustment system comprises an air compressor and an air pressure adjusting loop connected with the air compressor, wherein a pneumatic distribution central shaft and a rotary drum are divided into a negative pressure cavity and a positive pressure cavity by a seal clapboard: the positive pressure cavity is directly communicated with the atmosphere, the seeds are discharged by means of pressure release when the rotary drum is rotated to the positive pressure cavity, and the seeds are absorbed when the rotary drum is rotated to the negative pressure cavity, therefore, the seeds charge and the seeds absorption are alternately preformed under the continuous rotation of the rotary drum. The device is reasonable in structure, and is novel and simple in principle, so that the precise seeds-sowing is directly realized under the self gravity of the seeds and the free movement of the seeds, and the requirement for applying an outer force such as the vibration and the like in the other various seedlings-growing modes is overcome.

The invention provide a three-limit time-base circuit composed of analogue integrated circuit operational amplifier A (or voltage comparator B), few separate electronic elements by using new principleand ingenious connection mode. The three-limit time-base circuit has top and bottom limit main control functions completely compatible to all functions of classic 555 time-base circuit can be used asultra-top and bottom limit control circuit and astable, monostable and bistable circuit. The invention increases exceed bottom limit protection and control function, when inputted sensing circuit hasfault, fault display and protection control can be executed in time to prevent the main control circuit from being out of control. The invention, used in control circuits for temperature, pressure, water level etc., may improve security, and prevent severe accidents (such as fire hazard). So, the invention has wide use in electronic application field such as household electrical appliances, simple controllers, and high cost performance of products are provided.

The invention relates to a gear double-face engagement precise detection device. For a common double-engagement instrument, a handwheel is shaken to enable a leading screw to rotate to drive a slide block to do longitudinal movement on a linear guide rail on a support for engagement and separation of a detected gear and a standard gear, the structure is complex, and the cost is relatively high. The gear double-face engagement precise detection device comprises a support, wherein the support is provided with a measuring assembly, a detected assembly, a position adjusting device and a measuring assembly. The gear double-face engagement precise detection device is characterized in that the detected assembly comprises a swinging shaft and a swinging frame arranged on the swinging shaft horizontally, the position adjusting device comprises a compaction spring, a cam with a handle and a mobile board, the mobile board is movably arranged on the support, the compaction spring and the cam with the handle are mounted in mounting holes of the mobile board, the measuring assemblies comprise displacement sensors arranged on the mobile board, and axial lines of the displacement sensors are perpendicular to the swinging frame. The gear double-face engagement precise detection device has a simple structure, is simple and convenient to operate and is suitable for mass detection and quality control in a gear production field and a detection center.

The invention discloses a quick connecting device for steel bars comprising a fixed valve body and a moving valve body. The quick connecting device for the steel bars is characterized in that the fixed valve body is connected to an end cover with a round hole in a threaded mode to fix the steel bars, the inside of the fixed valve body is provided with a limited block for limiting the outside surface of the steel bar end, and bar-shaped holes are formed above and below one end, close to the end cover, of the fixed valve body; first protrusion bodies are arranged in the bar-shaped holes, a groove-built-in spring is disposed between the upper and lower first protrusion bodies for supporting, and a telescopic rod is arranged in the spring; a connecting body is arranged in the fixed valve bodyand the connecting body is fixedly connected to the fixed valve body in a threaded mode, one of the steel bars is squeezed and fixed between the connecting body and the moving valve body, and holes connected through pins are up-down formed in the corresponding positions on the pressing surface of the moving valve body and the fixed valve body; and the connecting body is sleeved with a rubber ring,the interior of one side, close to the moving valve body, of the connecting body is hollow, and an inner plug is arranged in one side, close to the steel bars, of the connecting body and is connectedwith the connecting body in a threaded mode. The quick connecting device for the steel bars is stable in structure and convenient to popularize, and the connection of the steel bars is simpler and more convenient through the arrangement of the spring in a connecting sleeve.

The invention discloses a winding method for automatic torque conversion and a carbon-free car. The carbon-free car comprises car wheels, a car body, a stand column, a pulley block, a pulling rope, an output shaft, a weight, a starting wheel, a winding wheel and a climbing wheel. The stand column is vertically arranged on the car body; the pulley block is arranged on the top part of the stand column; the climbing wheel, the winding wheel and the starting wheel are arranged on the output shaft; the starting wheel and the climbing wheel are located at two sides of the winding wheel; the output shaft is connected with a wheel axle of one car wheel through gear drive; a plurality of first buckling slots and a plurality of second buckling slots uniformly distributed circumferentially are respectively formed in the excircle of the starting wheel and the excircle of the climbing wheel; the diameter of the climbing wheel is larger than the diameter of the starting wheel; and the diameter of the starting wheel is larger than the diameter of the winding wheel. The carbon-free car provided by the invention has the beneficial effects that the carbon-free car not only meets the drive requirements of competing cars, but also can meet the requirement on automatically and timely converting different power torques required for uphill and downhill racing tracks when driving on a level racing track.

The invention provides a steel wire used for cutting, which is of a continuously circulating sawtooth type longitudinally. The invention also provides a method for manufacturing the steel wire for cutting, wherein two working gears are pressed oppositely at a fixed position, and the steel wire is continuously formed through the rotating press of the two working gears. The invention also provides a manufacturing device, comprising an upper assembly, a lower assembly, two blocks of wallboards, two springs, two pressure control screws and a bracket, wherein the upper assembly and the lower assembly are composed of two standard gears, a working gear, a wheel axle, a bearing, a bolt and a nut; a working gear is clamped between two standard gears; the pressure control screw with a tension spring hole is respectively arranged in the spindle head hole at two ends of the spindle shaft of the upper assembly; a tension spring is installed in the tension spring hole of the pressure control screw; and the other end of the tension spring is installed at the shaft end of the wheel shaft of the lower assembly. The invention solves the problem of low speed of traditional cutting steel wire belt sand liquid, thus making up the defects of the prior art.

The invention provides a rain-proof, dust-proof and ventilated heat dissipation device of a preassembled substation box, which is characterized by comprising a ventilated heat dissipation device and a dust filtering device, wherein the ventilated heat dissipation device is arranged at the outer side of a door plate of the preassembled substation box, and the dust filtering device is arranged at the inner side of the door plate of the preassembled substation box; the ventilated heat dissipation device comprises a frame and a bent plate which is arranged in the frame and is oblique and downward; the dust filtering device comprises a filtering screen bracket and a filtering screen which is arranged in the filtering screen bracket; and the frame, the door plate and the filtering screen bracket are connected through screws and fasteners. The device provided by the invention has the advantages of novel principle, simple structure, high generalization degree, high production efficiency, scientific and reasonable structure and good ventilated heat dissipation and dust-proof effects, is suitable for batch production, is convenient to assemble, and better achieves the purposes of ventilated heat dissipation, dust prevention and protection.

A mechanical hydraulic oil source selecting valve comprises a main level structure and a pilot level structure, wherein the main level structure adopts a two-position three-way hydraulic slide valve structure; the pilot level structure adopts a slide valve structure; the pilot level structure is connected with a pilot control cavity of the main level structure through a hydraulic pilot oilway, and is further connected with a main oil source and a spare oil source respectively; the hydraulic pilot oilway has pilot hydraulic pressure; the pilot level structure compares pressure difference between the main oil source and the spare oil source in a mechanical way, and controls the pilot hydraulic pressure in the hydraulic pilot oilway through a comparison result, so that a main valve core of the main level structure does reversing motion under the action of the pressure difference between the pilot control cavity and a main spring to change communicating relations between the main and spare oil sources and an outlet O, and further, the switching oil supply of the main oil source and the spare oil source is achieved. The mechanical hydraulic oil source selecting valve has the advantages as follows: by adopting two-level hydraulic valve structure, main valve switching is implemented through the hydraulic pilot oilway, so that the principle is novel; the mechanical hydraulic oil source selecting valve can reliably and rapidly implement automatic switching of a large-flow oil source, and the reliability of an electro-hydraulic servo system is improved.

The invention relates to a gear stepless speed changer, which comprises: planet gear system and one-way bearing as one-way clutch, wherein the gear system comprises an active sun wheel connected to the power input; there are 3-6 output planet wheels meshed with the circumference of active sun wheel; the output planet wheel is mounted on the planet wheel support fixed with the power output; each output planet wheel is meshed with one tooth ring; one-way bearing is arranged on the tooth ring; the output planet wheel and the planet wheel support are the output; the revolution speed of planet wheel support is the output rotation speed; the active sun wheel is the input; the tooth ring is the input used when changing speed; the power of driving tooth ring can be obtained from the input axle; the rotation direction of tooth ring is same as active sun wheel; the one-way bearing sheathes the tooth ring or the element connected to the tooth ring, to rotate the tooth ring at single direction. The invention has simple structure, stepless speed change, and wider speed range.

The invention discloses a material screening device which comprises a swing box rack, wherein a screening box is arranged on the swing box rack; an air blowing device is arranged at the top end of the screening box; an air suction device is arranged at the bottom end of the screening box; a material storage device is arranged at the upper part of the air blowing device; each of the air blowing device and the air suction device comprises a fan; the screening box comprises a screening box outer wall, discharge hole open / close doors and screens; a plurality layers of the screens are arranged in the screening box; the screening box outer wall at the upper end of each screen is provided with one discharge hole open / close door; the screening box can swing in an inclining manner on the swing box rack. According to the material screening device disclosed by the invention, a negative pressure airflow is formed at the inner part of the device in a fan blowing manner, so that materials and the airflow enter the material screening device in a rotating manner, so that the screening action can be more effectively performed. The material screening device can be used at relatively stable places, as well as can be used at some places with special requirements where the site conditions are relatively complicated and the screening needs to be detected in real time.

The invention relates to a preparation method of an alpha-oxoglutarate fluorescent / ultraviolet molecular probe and application of the alpha-oxoglutarate fluorescent / ultraviolet molecular probe to biological samples. The preparation method includes the steps that NBD-Cl is dissolved in chloroform, the dissolution concentration is 0002-0.012 g / ml, then a hydrazine hydrate-methanol solution with the volume concentration being 0.2-1.2% is added in and uniformly mixed, brown precipitate is obtained through stirring at room temperature and filtered, a filter cake is washed through ethyl acetate and dried, and the brown product alpha-oxoglutarate fluorescent / ultraviolet molecular probe is obtained. The alpha-oxoglutarate fluorescent / ultraviolet molecular probe is applicable to qualitatively and quantitatively analyzing alpha-oxoglutarate in the biological samples, and detection is sensitive, accurate and fast. The biological samples mainly comprise serum, living cells, muscle tissue and the like. The alpha-oxoglutarate fluorescent / ultraviolet molecular probe can be applied to analytical chemistry, life organic analysis, disease pre-diagnosis, medical clinical inspection and other related fields. The alpha-oxoglutarate fluorescent / ultraviolet molecular probe has the advantages of being good in response performance and high in data accuracy, repeatability and precision, equipment is convenient, fast and easy to operate, operability is high, and the alpha-oxoglutarate fluorescent / ultraviolet molecular probe is particularly suitable for large-batch sample combined screening and other large-data research.

The invention discloses an impacted water cooling chip radiator with an imitated vegetation vein fractal micro-channel. The radiator comprises a shell composed of a circular baseboard, a cylindrical side wall and an annular top plate, wherein the baseboard is provided with a circular hollow part, and first-level, second-level, third-level and fourth-level grooves, the circular hollow part of the imitated vegetation vein fractal micro-channel is arranged at the centre of the baseboard, the first-level groove is symmetrically and radially arranged along the outer edge of the circular hollow part, each first-level groove is divided into two second-level grooves, each second-level groove is divided into two third-level grooves, each third-level groove is divided into two fourth-level grooves, the centre of the annular top plate is connected with a water inlet, and the periphery of the water inlet is uniformly provided with at least two water outlets which are connected with the annular top plate. The radiator is characterized in that the surface of the imitated vegetation vein fractal micro-channel is adopted, so that the fluid is better in flowing property, and the radiator is beneficial to improve the heat-sink thermal homogeneity and local high temperature of the micro-channel. The radiator is simple in structure, novel in principle and obvious in heat dissipation effect.

The invention provides a distribution network single phase earth fault detection method based on a transient component. The method has the advantages of novel principle, small computational complexity, wide applicability, easy realization and low construction cost. Through zero sequence voltage starting, by use of transient zero sequence voltages and transient zero sequence currents at an initial stage when a fault is generated, after bandpass filtering is performed, the fifth harmonic component of a line and an earth capacitance parameter are calculated, and according to the size of the fifth harmonic component and the positive and negative characteristics of the capacitance parameter, whether a protected line generates a single phase earth fault is identified. The method is free from the restrictions of an earth ground and a line grid structure, can be applied to an overhead line, a cable line or a mixing line, and is good in performance and high in sensitivity. The earth resistance which can be detected reach 1 K ohm, yet in actual engineering application, a fixed value set workload is quite small.

The invention relates to a smoke fire detector, in particular to a capacitive smoke fire detector, and solves the problem that the existing fire detector has complex application background and is effected by different interference sources; the invention comprises a shell and a capacitor, wherein, the capacitor comprises 3 to 20 layers of capacitance plates and two electrode rods; the capacitance plate has round plate shape with the diameter of 30 to 150mm, wherein, two sides of an insulating plate are respectively provided with an upper layer of capacitance pole and a lower layer of capacitance plate; the upper layer of capacitance poles of adjacent capacitance plates are connected in parallel by an upper layer of parallel leads; the lower layer of capacitance plates of adjacent capacitance plates are connected in parallel by a lower layer of parallel leads; the capacitance plates are fixed on the two electrode rods; the distance of the adjacent capacitance plates is 2 to 10mm; the capacitor is arranged at the lower part of the inner of the shell; an anti-insect net is positioned at the lower part of the shell; the invention is a capacitive fire detector based on a new concept, which has simple form, complete function, wide environment background adaptive capacity and realizing capacity of improving the effective function in the condition of complex environment.

The invention provides a normal pressure plasma ion source; an inertia reaction gas tube is connected with the inlet end of a reaction ionization tube; the reaction ionization tube is wrapped by an electrode slice; an insulation sleeve sleeves on the reaction ionization tube and the electrode slice; the electrode slice is connected with an electrode wire; the electrode wire leads out from a hole of the insulation sleeve and is connected with a high pressure medium block discharge source phase; the invention also discloses a new chlorine / bromine isotope mass spectrometer comprising the ion source, and provides a chlorine / bromine isotope ratio analysis method. The method can use a plasma ionization source stably working under a normal pressure to combine a sample conversion process with an ionization process, thus greatly reducing the analysis flow; a magnetic mass analyzer and a Faraday detector satisfying ionization fragment requirements are matched and coupled to form the novel chlorine / bromine isotope mass spectrometer with a high analysis precision; the ionization source can work under a normal pressure and atmospheric pressure conditions, and can be applied to the chemical, environmental protection, geosciences and medical science fields.

The invention discloses a wireless communication network transmission structure comprising a main channel for transmitting data between a center node and a slave node and an auxiliary channel for transmitting beaconing from the center node to the slave node, wherein the matched auxiliary node is started up according to a beaconing frame signal after the receiving end of the auxiliary channel receives the beaconing frame signal sent from the center node. In the communication process of the transmission structure, the event-driven achieved by a beaconing frame replaces a blind receiving action in channel receiving, the inefficient energy consumed by the slave node in the blind receiving process is eliminated, the energy efficiency and the service life of the transmission structure are improved.

The invention discloses a magnetic fluid flywheel for a spacecraft, which is capable of avoiding the problems of friction damping and abrasion of a conventional mechanical flywheel and prolonging theservice life and the overload resistance, and belongs to an attitude control system of the spacecraft. The magnetic fluid flywheel comprises a conductive fluid ring component, a magnetic steel component and electrodes. The magnetic fluid flywheel is simple in structure, high in assembly precision and convenient to replace. The magnetic steel component is used for providing a high-strength uniformvertical main magnetic field for a conductive fluid, a positive electrode and a negative electrode of the magnetic fluid flywheel are lead out by the two electrodes, the positive electrode and the negative electrode are electrified to enable the inner wall and the outer wall of a fluid ring to form a potential difference, the conductive fluid is stressed to rotate through the charge movement, andthe conductive fluid in the conductive fluid ring component can rotate to generate torque and angular momentum in order to realize the low-disturbance ultra-quiet index of the magnetic fluid flywheel.

The invention relates to an automatic orchard obstacle-avoiding mowing machine. The automatic orchard obstacle-avoiding mowing machine comprises a primary machine frame, and a secondary machine frameis rotationally arranged in the primary machine frame; the automatic orchard obstacle-avoiding mowing machine also comprises a first hollow rod and an elastic supporting rod, one end of the secondarymachine frame is hinged to one end of the first hollow rod, and the other end of the secondary machine frame is hinged to one end of the elastic supporting rod; a second hollow rod is perpendicularlyand fixedly connected to the other end of the first hollow rod, a cutter disc shaft arranged in the axial direction of the second hollow rod is arranged in the second hollow rod, and is sleeved with an obstacle avoiding wheel, and a cutter disc is fixedly connected on the cutter disc shaft; the other end of the elastic supporting rod is hinged to the side wall of the first hollow rod; the automatic orchard obstacle-avoiding mowing machine also comprises a driving device, and the driving device is arranged on the firs hollow rod. By means of the automatic orchard obstacle-avoiding mowing machine, fruit-tree inter-row weeding and inter-plant weeding operation can be carried out at a time; fruit trees can be automatically avoided during weeding, weeds close to roots of fruit trees are weeded;the structure is simple, and the theory is novel.

The invention discloses a braille reading and writing device based on a cold and heat signal. The device comprises a system controller, a display screen, a writing screen, a control screen, a cold and heat pen, a data collector, a data storage and a power interface, wherein a cold and heat display part is embedded in the display screen; a temperature measuring part is embedded in the writing screen; a control screen temperature measuring part and a control screen cold and heat display part are embedded in the control screen; the cold and heat display part, the control screen cold and heat display part, the data collector, the data storage and the power interface are respectively connected with the system controller; and the temperature measuring part and the control screen temperature measuring part are connected with the data collector. The cold and heat signal is introduced into the braille reading and writing field for the first time to substitute a convex and concave characteristic, so that the large-area plane touch type braille reading and writing device without a movement component is realized. The device is novel and unique in principle, high in reliability, low in cost and large in display area and writing area, is easy to popularize and does not have the movement component.

The present invention relates to a preparation method and an application of a dual-response fluorescent molecular probe for detecting ClO<-> / H2S based on hydrogen ion activation. The method comprises the steps of dissolving NBD-Cl in chloroform, adding a hydrazine hydrate-methanol solution, and performing uniform mixing to obtain a product 1; dissolving the product 1 in ethanol, adding benzaldehyde and glacial acetic acid, and conducting refluxing, cooling, precipitation, etc. to obtain the final product. The fluorescent molecular probe is applicable to qualitative analysis and quantitative analysis of ClO<-> / H2S in biological samples, and detection is sensitive, accurate and fast; the biological samples mainly include gastric juice, gastric mucosa, cells, and so on. The fluorescent molecular probe can be used in the related fields of analytical chemistry, life organic analysis, disease pre-diagnosis and clinical examination.

A hydraulic servo steering engine system belongs to the steering engine device of an aircraft. A direct current motor is fixed on a machine core, the direct current motor is connected with a hydraulic pump, a flow channel and an oil cavity are cast inside the machine core, and the oil cavity is interconnected. Four servo valves are mounted on the machine core axially and symmetrically, each servo valve is respectively connected with an oil cylinder, the piston rod of the oil cylinder is hinged with a connecting rod which is hinged with a rudderpost, the rudderpost is connected with an angular displacement sensor which is connected with a controller, and the controller is connected with the servo valves to form a one-to-four hydraulic servo control system. The invention has new principle, highly integrated structure, small volume, light weight, quick response and high reliability, and is applicable to different severe environments.

The invention discloses a method for detecting acrylamide in thermal processed foods by using a fluorescence method based on quantum dots. The method comprises the following steps: (1) pretreatment: extracting acrylamide from the thermal processed foods by utilizing a formic acid solution to obtain a sample to be detected; (2) preparation of functional quantum dots: obtaining an NAS-QDs compound solution; (3) detecting acrylamide content in potato chips by using a standard addition method: adding acrylamide standard substance solutions with different concentrations into the sample to be detected so as to obtain different solutions to be detected respectively; taking 450 microliters of NAS-QDs compound solution, adding 5 microliters of 100mmol L-1 photoinitiator TPO and 50 microliters of solutions to be detected to the NAS-QDs compound solution in sequence, and after ultraviolet irradiation, detecting the fluorescence intensity at 600 nm under 365 nm excitation light; and drawing a response curve of the fluorescence intensity and the concentration of the added acrylamide standard substance, and finally obtaining the acrylamide content in the thermal processed foods.

The invention belongs to a safe control time-base circuit guaranteeing the safety of an over-limitation control circuit or an timing control circuit in case of breakdown through preventing out-of-control, and the safe control time-base circuit is applied to temperature control electric apparatus, pressure control electric apparatus, water stage control electric apparatus and timing control electric apparatus, for improving the safety performance and avoiding serious accidents (fire, for example) during use. The following technical measure is taken for realizing the excellent function: most importantly, electronic devices are connected in a smart way to simply constitute a base-assembled master control circuit, a base-supported top-shielded protection and control circuit, a series-control propel executive circuit and a protection and control display circuit, wherein the base-assembled master control circuit and the base-supported top-shielded protection and control circuit are connected in parallel with signals output by a detection sensing circuit or a timing circuit. The protect loading of the base-supported top-shielded protection and control circuit monitors the control level output by the base-assembled master control circuit, so as to close the out-of-control level output by the master control circuit at first in case of breakdown and force the executive circuit to cut loading supply, thus the safety is guaranteed. Therefore, the safe control time-base circuit can be widely used in the field of electric application, and enables the electric apparatus to have high performance-price ratio.

The invention discloses an energy-saving one-step granulator. The energy-saving one-step granulator comprises a rotary barrel body, wherein a barrel cover is formed at the upper end of the rotary barrel body, and a feeding device is formed on the barrel cover. The energy-saving one-step granulator is characterized in that humps are formed at the bottom end surface of the inner wall of the rotary barrel body; a stirring device and a press rolling device are mounted on the barrel cover; and a vacuum discharge device is also mounted on the barrel cover. As an improvement, the press rolling device comprises a motor A which is in transmission connection with a gear box, and a press rolling mechanism is in transmission connection in the gear box. As an improvement, the vacuum discharge device comprises a vacuum discharge pipe, a vacuum discharger and a vacuum discharge valve. The energy-saving one-step granulator combines multiple functions of mixing for granulating, drying, rolling and the like, so that the turnover of materials in a production process is reduced and the production efficiency is improved. Moreover, according to the invention, the accurate control on whole particles is implemented by adjusting the rotating speed of a rotating blade and the gap between two rollers.

Earth phenomena instrument in use for demo of running variability when sunlight shine earth includes following parts: globe cover composed of two pieces of hemipheric cover including sunlight cover and night cover; sphere inside the cover for denoting earth; and meridian outside the cover; bearer for supporting above said parts. The globe cover is sedentary. Rotable earth axis is in south and north direction of the sphere. The meridian can be rotated back and forth angles around the globe cover. In time of demo, rotating the sphere and meridian can display day and night, calculate time difference, change of the four seasons and condition of air temperature in each place based on change of perpendicular incidence point on earth shined from sun. Features are: simple structure, easy of fabrication, reflecting natural phenomenon between sun and earth.

The invention discloses a magnetically sealed double-body thermos cup. There is a central hole at the bottom of the upper cup, and a heat insulation plate is placed at the bottom of the upper cup body. There is a through hole in the center that is smaller than the bottom hole of the cup. The weight is a cylindrical magnetic conductive metal. pieces. The suction part is formed by a magnetic ring and a weight. The magnetic ring is a magnetic ring whose inner diameter is the same as that of the through hole of the heat shield, and is connected to the center of the heat shield. The magnetic adjustment pad is connected under the weight, and there is a heat insulation layer under the weight. The guide device is composed of a cap and a column, which guide and limit the movement of the weight. The lower end of the column is connected to the periphery of the bottom hole of the upper cup, and the upper end is connected to the cap. The cap acts as a limit to the falling of the weight, buffering Pad cushions the impact of the weight on the guide. The impact shield is located below the through hole in the heat shield. The thermos cup is turned upside down, the weight falls to make hot water flow into the upper cup, the thermos cup is placed upright, the weight falls, and under the action of the magnetic force, the weight presses the magnetic adjustment pad to seal the water. The invention has novel principle, simple structure and convenient use.

The invention relates to a damping drum device and a ball damping tall-building escape apparatus with same. The damping drum device comprises a base plate and a rope drum and is characterized in that the base plate is connected with a center shaft vertically; the rope drum is sleeved on the center shaft; the rope drum is matched with the center shaft through a bearing; at least two channels for the radial reciprocating movement of balls are uniformly distributed on the matching surface of the base plate and the rope drum; and at least two arched channels which are connected to a circle in radial direction are separately and uniformly distributed on the adjacent end faces of the rope drum and the base plate along the circumference. By using the invention, damping can be generated in the process when a worker goes down from the tall-building and the deceleration effect can be realized; and the damping principle of the mechanism is that when sliding in the cross channels, balls are hampered to generate damping. The device has low friction and is reliable; and the entire device has the advantages that the device has small volume and light weight, is easy to carry, the speed can be regulated, etc.

The invention discloses a preparation method of a modified carbon nanosphere lubricating oil additive, wherein the preparation method comprises the following steps: adding carbon nanotube powder intoa hydrogen peroxide solution, stirring the solution, washing after stirring, and drying after washing to obtain a product A. The invention also discloses the preparation method of the modified carbonnanosphere lubricating oil additive. The carbon nanotube powder with mature process is used as a raw material; the method is based on a carbon nanotube nano microstructure transformation principle, the synergistic effect of chemical modification and physical granulation is relied on, and carbon nanotubes are transformed into a three-dimensional folded spherical structure from a linear structure; the oil-soluble lubricating oil additive having the elastic 'ball bearing' effect is prepared through surface modification treatment, the dispersion stability is enhanced, the lubricating wear resistance under different engine working condition loads is improved, the control is easy, the cost is low, the oil-soluble lubricating oil additive is suitable for the large-scale preparation, and the gooduse prospect is brought.

The invention discloses a corrugated tapered corn thresher. The corrugated tapered corn thresher comprises a conveying mechanism, a threshing mechanism, a separation mechanism, a transmission mechanism and a rack, wherein the threshing mechanism comprises a tapered roller and a driving device for driving the tapered roller to rotate; the tapered roller is vertically arranged; a large-opening end of the tapered roller corresponds to a discharging end of a material distribution cabin and a small-opening end of the tapered roller corresponds to a core discharging cabin; a plurality of rows of corrugated threshing belts and dispersion teeth are distributed on the inner surface of the tapered roller in a staggered manner; the setting direction of each row of corrugated threshing belts and the setting direction of each row of dispersion teeth are parallel to the middle axis of the tapered roller; each corrugated threshing belt is of a solid structure formed by extending a sealed plane formed by surrounding a lower bottom edge, two side edges and circular arcs connected with the upper ends of the two side edges according to an S-shaped track; and each dispersion tooth is of a conical solid structure formed by surrounding a bottom end surface, a side curved surface and a spherical surface connected with the upper end of the side curved surface. With the adoption of the corrugated tapered corn thresher, mechanical loss in a corn threshing process can be reduced, the threshing rate is improved, and corncobs are not crushed.

The invention relates to a terahertz photon on chip control system and a control method thereof. The system comprises a semiconductor heterojunction, a plasmon waveguide, a first source electrode, a first drain electrode, a first gate electrode, a second source electrode, a second drain electrode and a second gate electrode, wherein two-dimensional electron gases are formed on the surface of the semiconductor heterojunction; the first source electrode, the first drain electrode and the first gate electrode are formed on the surface of the semiconductor heterojunction and used for forming terahertz source quantum dots; and the second source electrode, the second drain electrode and the second gate electrode are formed on the surface of the semiconductor heterojunction and used for forming the terahertz source quantum dots. The terahertz photon on chip control system uses surface plasmon to integrate terahertz sources, detection, spread and modulation elements into a chip, thus realizing the terahertz photon on chip control.