130results about How to "Obvious technological advancement" patented technology

The invention relates to a self-calibrating method of internal reference resistors of a multi-range digital electronic measuring instrument, comprising the following steps of: on the basis of the design line of the traditional digital electronic measuring instrument, additionally setting an electronic switch and a self-calibrating program; setting a resistor with good long-term stability as an internal standard resistor in a set of internal reference resistors; when in a self-calibrating state, controlling the electronic switch by using the self-calibrating program to form different combinations so as to obtain comparing and measuring circuits among different reference resistors; and respectively and directly or indirectly comparing the reference resistors with the set internal standard resistor to measure respective actual resistance values and storing the actual resistance values in an internal storage for automatically correcting measuring results. Because only one standard resistor with good long-term stability needs to be adopted, other reference resistors are compared and calibrated with the standard resistor, and the method effectively reduces the requirements of other reference resistors, is beneficial to reducing the production cost and ensuring the measuring precision of each measuring process so that the calibration in the production process and the periodic calibration of users both are simpler and more effective and accurate.

The invention discloses a preparation method for porcelain granules containing carbon. According to the weight percentage, 5%-40% of carbon powder, 5%-25% of gold mine tailing powder and 35%-70% of fly ash make up main raw materials. The preparation method comprises the steps of: (1) the gold mine tailing powder is dipped in a HCl solution; (2) the carbon powder, the fly ash and the modified mine tailing powder are uniformly blended; and then water is added for wet mixing; (3) the wet material is prepared into spheric granules with the grain diameter of 5-20mm; (4) the spheric granules are dried and sintered to obtain the porcelain granules containing carbon. The porcelain granules containing carbon are multifunctional porcelain granules with the functions of adsorption, light weight, high strength, heat preservation, thermal insulation, etc.

The invention relates to a method for preparing chitosan into water-soluble chitooligosaccharide, which comprises the following steps: using chitosan as a raw material, processing the chitosan by rinsing and drying technology, and immersing the chitosan in a material liquid prepared by purified water and edible hydrogen peroxide; carrying out the processing of microwave radiating degradation to form the mixed liquid of low-molecular chitooligo saccharide which can be dissolved in the material liquid and partial undegraded chitosan, and obtaining residual slag of chitosan and a chitooligo saccharide solution by filtration; and sending the chitooligo saccharide solution into absolute ethyl alcohol, and after alcohol precipitation, carrying out sucking filtration and drying to obtain a finished product of water-soluble chitooligo saccharide. The processing technology of microwave radiating degradation is used, and energy is mased by a physical method to degrade high-molecular chitosan into low-molecular water-soluble chitooligo saccharide with a stable structure, thus no other side product of reaction or pollutant is generated in the degrading process. Compared with the preparing method of the prior art, the invention has the advantages of advanced technology, simple procedures, low investment of production facilities, high product purity, stable quality and the like, and developsa wide market application prospect for the chitosan prepared by taking chitin as a raw material.

The invention relates to an asphalt smoke comprehensive environmental protection treatment system and applications thereof. The asphalt smoke comprehensive environmental protection treatment system comprises an environmental protection treatment facility, a gas transmission pipeline, an induced draft fan, and a chimney; the environmental protection treatment facility comprises a cyclone dust removal tower, a multistage filtering smell-removing box, a main air duct, a turbulent flow-type dynamitic wave water film washing tower, a cyclone separator, a precipitation circulation water basin, a filtering mist-capturing tower, a low-temperature plasma exhaust gas purifier, and a heat accumulating-type heating-power incinerator which are independent from each other; and the asphalt smoke comprehensive environmental protection treatment system is used for treating asphalt smoke generated in production. Compared with the prior art, the asphalt smoke comprehensive environmental protection treatment system is reasonable and scientific in structure design; operation is reliable; performance is stable; comprehensive utilization of generated wastes can be realized; no secondary pollution is caused; and the asphalt smoke comprehensive environmental protection treatment system is beneficial for full utilization of resources and energy saving.

The invention relates to non-curing waterproof glue with double character. The non-curing waterproof glue is mixed by asphalt used as main material and auxiliary materials which contain thermoplastic elastomer, modifier, tackifier, plasticizer, diluting additive and filler. As the modified asphalt sizing material uses high quality thermoplastic styrene-butadiene rubber as raw material to improve the high temperature performance, uses tackifying resin to increase the viscosity of asphalt, uses the plasticizer to improve the compatibility and processing performance between asphalt and the modifier and uses carbon black and calcium carbonate with stable chemical properties as filler, the ultraviolet ray aging resistance of the non-curing waterproof glue of the invention can be improved, the reinforcing effect can be realized and the production cost can be reduced; and the non-curing waterproof glue product can remain solid at the room temperature and can be in a flexible glue state and be not cured in a sealing state.

The invention relates to VDMOS and IGBT power device with composite grid and self-isolated grid-source. Wherein, it sets a thermal-oxidized SiO2 grid between source and multicrystal Si grid, and adds a Si3N4 layer to form a composite grid together with last grid to increase grid yield. Compared with prior art, this invention increase can fast shield grid window and generate only -very-thin oxidation layer to simplify manufacture technology, and needs low cost.

The invention relates to a high-performance synthetic rubber asphalt waterproof coiled material with good high and low temperature resistance, high bonding strength, good air permeability, high surface tensile strength and capability of meeting the long-term water leakage-proof use requirement in a 'composite waterproof system'. The coiled material consists of an upper coverage layer, a lower coverage layer and a middle waterproof layer, wherein the upper coverage layer is made of polyethylene polypropylene fibers, a polyethylene film or a metal aluminum foil; the lower coverage layer is made of needled polyester non-woven fabric; and the middle waterproof layer is made of modified asphalt glue layer prepared from modified asphalt glue. The performance of the coiled material is improved by organically and comprehensively utilizing special functional materials, multiple macromolecules and inorganic materials, the waterproof performance of the coiled material is greatly improved, the cost of the coiled material is effectively reduced, the service life of the coiled material is reliably guaranteed, and the coiled material used with non-curing glue can make a substantial contribution to construction of a complete composite waterproof system, so the coiled material has obvious technical advancement and strong practicability.

The biological diesel oil is produced with fatty acid, oleic acid, acidified oil and/or sewage oil as main material, and through adding methanol in 5-10 wt%, n-butanol in 5-10 wt%, ethylene-vinyl acetate copolymer in 0.1 wt%, octyl nitrate in 0.1 wt%, alkyl naphthalene in 0.05 wt%, and ethylenediamine and high base number calcium naphthenate successively white stirring in a reactor. The production apparatus consists of reacting tank, high speed stirrer, operating platform, rack and PLC control system. The present invention provides environment friendly biological diesel oil.

The invention relates to a synthesis method of N-methylpiperazine and chemical synthesis methods of chemical products, particularly to a synthesis process of N-methylpiperazine using vermex, formaldehyde and hydrogen as materials. Vermex is reacted with formaldehyde under atmosphere pressure to generate a condensate, and then the condensate is reacted with hydrogen in a same reaction container and under catalysis of Raney nickel catalyst to obtain N-methylpiperazine, wherein, the hydrogenation pressure is 1.0-6.0 MPa, the hydrogenation temperature is 70-100 DEG C, the catalyst dosage is 4%-12% of vermex dosage, the reaction solvent is methanol. The method has advantages of short process, low investment, high efficiency, etc.

This invention relates to blowing with CO2 and hardening sand mould method. on one side wall of casting box or casting frame, set location holes according to given certain size and amount; when preparing sand mould, for different mould shapes, insert round bars crossed horizontally mould top to nearby of another side wall to wall holes accorded with blowing hole diameter and amount; on the base that ensures keep certain sand layer thickness between bar and mould surface and certain distance between its top and another side of sand box, fall moulding sand, ram and locate; after forming, draw out bar, form blowing air hole; cover plant plate on sand box top, blow CO2 till sand mould change to hard. This invention can fit to all cavities variety request; the product has advantages of well quality, even harden, easy to demould and convenient to convey.

A method for repairing the crack on arc surface of metallic object features that an arc profile plate with the copied crack line, temporary installation holes and the central locating holes arranged at intervals, several repairing screw bolts and nuts, and the arc inserts for preventing the extension of crack are used.

Based on visual persistence of human eye, brightness theory of subjective sensation and characteristic of quick response of LED, controlling ducting pulse width of LED operating voltage realizes control for LED brightness when basic frequency of operational power supply is adjusted at 60Hz to 180Hz. Moreover, it is ensured that LED keeps pure white light within range of changing light brightness. The method described above is also applicable to LED in other color, that is to say brightness is adjusted while color is not changed basically. The invention solves difficult problem in brightness adjustment for LED, playing active effectiveness for using LED with advantages of energy saving, long service life, and no pollution etc.

The invention relates to a heating panel of a wide channel plate type heat exchanger and a surface strengthening technique thereof. The heating panel with two plates which are combined together consists of a flat section at the two ends, a middle expanding section and an inclined radiating section, wherein, the inside of the middle expanding section is provided with a water flow channel, the outside surfaces of the flat section at the two ends and the inclined radiating section are provided with an erosion-resistance reinforced layer consisting of a layered high hardness alloy powder spraying layer and a high strength resin plugging layer. The surface strengthening technique adopts the supersonic spraying technique and the oxyacetylene spraying technique in the flame spraying technique; the erosion-resistance reinforced layer consisting of the layered high hardness alloy powder spraying layer and the high strength resin plugging layer is sprayed on the erosion working surface of the heating panel, thereby improving the surface hardness and the abrasion resistance of a stainless steel plate and contributing to improving the product quality of the heat exchanger, prolonging the service life and improving the working stability.

The invention relates to a voltage-equalizing method of the voltage of all single cells in the lithium-cell group and a device thereof, the device comprises a box body, a lithium-cell group and an electrical circuit board that is provided with an electronic switch component, an energy-storing element, a sampling electronic switch and a single chip. The electronic switch component consists of a group of electronic switches with one end respectively communicated with an electrode leading pin that is formed by the serial connection of the single cells, and with the other end communicated with a leading pin of a power-storage element and a signal input/output pin of the single chip. The single chip controls the on-off of the electronic switches, executes the voltage sampling of all single cells, closes the corresponding electronic switches as required, takes out and stores the surplus electric power from the single cell with higher voltage into the power-storage element so as to decrease the voltage of the single cell, and transmits the electric power stored in the power-storage element to the single cell with lower voltage so as to increase the voltage of the single cell; under the automatic control of the single chip, the electric power is automatically transferred as required, the voltage of all single cells in the lithium-cell group becomes equal to realize the voltage equalizing, thereby favoring the energy conversation and improving the service life of the lithium-cell group.

The invention relates to a crystalline silicon ingot furnace thermal field structure with a two-stage thermal insulation cage. The thermal insulation cage has a two-stage structure, and consists of an upper thermal insulation cage fixed on the top of the furnace and a lower thermal insulation cage fixed on a lifting device at the bottom of the furnace; the upper thermal insulation cage is an inverted bucket, and consists of a top insulation board and an upper insulation cylinder of which the lower edge is provided with an L-shaped inner-turned upper insulation ring, wherein the top insulation board and the upper insulation cylinder are connected with each other into a whole and the inner surface of the top insulation board is provided with a concave arc reflector; the lower thermal insulation cage is an upright bucket, consists of a bottom insulation board and a lower insulation cylinder of which the upper edge is provided with an L-shaped inner-turned lower insulation ring, and is fixed on the lifting device controlled externally at the bottom of the furnace, wherein the bottom insulation board and the lower insulation cylinder are connected with each other into a whole; and the upper and lower insulating rings separate the inner cavity of the thermal insulation cage into an upper high-temperature area and a lower high-temperature area. The thermal field required by the production of the crystalline silicon is realized by adjusting the lift opening of the lower insulation cage through the lifting device; and the structure has the advantages that: the structure is simple and reasonable and obviously saves energy, the established thermal field has high stability and repeatability, the temperature is difficultly interfered by air disturbance and the structure has high practicability.

The present invention provides an injection mold screw thread core pulling mechanism. The mechanism comprises a mold cavity, an injection part, a screw thread type core inside the injection part, and a pushing plate arranged below the injection part. The screw thread type core is connected with a rotating core pulling mechanism. The pushing plate is connected with an ejection mechanism, and further comprises a PLC synchronization control system, wherein the screw thread type core pulling and the pushing plate have synchronous ejection travel through the PLC synchronization control system. The ejection mechanism comprises a servo motor, a sprocket pair and a screw rod nut pair, wherein the servo motor is connected with the sprocket pair, the sprocket pair is connected with the screw rod nut pair, the screw rod nut pair is connected with the pushing plate. The injection mold screw thread core pulling mechanism provided by the present invention has a reasonable and compact structure, and adopts the screw rod nut, such that the rotation movement is directly transformed into the linear movement, the ejection mechanism further becomes the labor-saving mechanism so as to reduce the torsional moment of the servo motor, conveniently install the mechanism. In addition, the injection mold screw thread core pulling mechanism provided by the present invention has significantly technical advancement.