44results about How to "No request" patented technology

This invention relates to a stepless meshing control clutch with large power. The clutch, super clutch, control derailleur, line clutch, control strains drive device, which are designed by the principles of meshing stepless displacement and the continuous meshing stepless locking and control, which are suitable to automobile, derailleur, impulse derailleur, automatic derailleur, machine bed and other locations needing large power.

The invention discloses an elevator brake control system and a control method. According to the scheme, a power supply regulation circuit is adopted to regulate input PN voltage into direct current voltage required by elevator brake control through closed-loop control, and current change required by elevator brake control can be controlled according to demands; meanwhile, a switch circuit is matched with the power supply regulation circuit, and the switching of current regulated through the power supply regulation circuit is controlled, so that a brake power supply is shut off. The brake control scheme replaces the traditional brake power supply and brake contactor, reduces the cost, eliminates the noise produced during the operation of the contactor, improves the reliability of circuits, reduces the quantity of maintenance points, can control the operation process of a brake through current control, reduces the noise produced during the operation of the brake, and cancels continuous current circuits at two terminals of a brake coil.

The invention belongs to the field of titanium silicon molecular sieve, and more specifically provides a titanium silicon molecular sieve, and a synthetic method and applications thereof. The titaniumsilicon molecular sieve is composed of crystal particles with a particle size ranging from 5 to 200nm via aggregation; the particle size of the titanium silicon molecular sieve ranges from 0.3 to 5<mu>m; the I960/I550 value ranges from 0.7 to 0.85. The invention also provides a cyclic ketone oxidation method. The cyclic ketone oxidation method comprises a step of contact of cyclic ketone, and anoxidizing agent with a catalyst. The catalyst contains the titanium silicon molecular sieve. The crystal of the titanium silicon molecular sieve is high in I960/I550 value, and is large in effective framework ti content. When the titanium silicon molecular sieve is used in oxidation reaction, the catalytic oxidation activity, and the reaction product selectivity are increased obviously, and excellent catalytic stability is achieved. The titanium silicon molecular sieve is capable of realizing aggregation of small crystal particles in crystallization growth process instead of simple physical aggregation of the small crystal particles, and micron order is achieved.

The invention discloses hierarchic porous La2Zr2O7 ceramic and a preparation method thereof. The hierarchic porous La2Zr2O7 ceramic comprises micro-mesoporous and macro-pore binary oxides, wherein the aperture of the micro-mesopores is 1-5nm; the aperture of the micro-pores is 0.5-5mu m; the specific surface area is 43-150m<2>/g. The preparation method comprises the following five steps: preparing a precursor solution; preparing sol and gel, ageing, drying and roasting at a high temperature. The preparation method disclosed by the invention has the advantages of low cost, low energy consumption, simple process, no corrosion to equipment, no pollution to the environment and the like, and the prepared hierarchic porous La2Zr2O7 ceramic has the characteristics of high specific surface area, stable structure, no phase change between room temperature and the melting point, good high-thermal resistance, sintering resistance, vapor resistance and resistance to strong acid corrosion, and the like, and is applicable to the fields such as high-temperature catalysis, combustion and chemical separation.

The invention belongs to the fields of machinery and test, and in particular relates to a small force measuring device. The small force measuring device comprises a workbench, a vertical ruler, a silk yarn, a horizontal ruler, a horizontal bracket, a dial needle, a positioning nut and weights, wherein the workbench consists of a horizontal platform, a vertical rod and a suspension arm; one end of the silk yarn is tied to the suspension arm, and the other end of the silk yarn is hung with the weight; the vertical ruler is fixed on the vertical rod of the workbench, and the horizontal ruler is fixedly connected with the horizontal platform of the workbench; one end of the horizontal bracket is used for fixing the fixing part of a measured object, and the other end of the horizontal bracket is provided with a positioning mechanism; and the movable part of the measured object is fixed with the dial needle. The device can measure small force through utilizing a simple principle, is reasonable and reliable in scheme and low in part dependence, does not use precise parts and is low in design and manufacturing cost; the temperature and humidity have small influence on a measurement result, and the device is low in environmental requirements; the device is simple in structure and high in measurement precision; the device is convenient to operate, does not need special training, and does not have special skill requirements, and data are convenient to read; and the device can also be a calibration device of a high-precision force transmission device.

The invention discloses a clopyralid salt active compound, a preparation method for water-soluble granules of the clopyralid salt active compound and applications. The active compound is obtained from solid clopyralid and solid alkaline substances through direct reaction. During the preparation process, materials keep in a solid state, crystallisation process of products is not needed, synthetic steps are simplified, the yield is raised, energy consumption is reduced, no three wastes are discharged, no dust is generated, safety and environmental protection properties are good, and pollution to the environment is low. Through adjustment of selection and matching of auxiliary materials, the foaming property of the prepared clopyralid water-soluble granules is lowered, the disintegration speed and the solubility are raised, there is no deposition in the solution after dissolution, and when the water-soluble granules are compared with an aqueous solution, packaging, transporting and storage are convenient, the cost is low and application is convenient.

The invention discloses a method for catalytically synthesizing xanthenedione compound open ring derivatives through hydroxyl ammonium ionic liquid, and belongs to the technical field of green synthesis of fine chemicals. According to the technical scheme, the method is characterized in that aldehyde compounds and dimedone serve as the substrates, the hydroxyl ammonium ionic liquid serves as the catalyst, stirring reaction is conducted for 0.5-4 h at room temperature, and then the target products, namely the xanthenedione compound open ring derivatives, are prepared. The method is implemented under the condition of no solvent, volatile organic solvent is effectively prevented from being used, the cost of the reaction process is reduced, and the harms to operators are reduced; the reaction is conducted at room temperature, no heating is needed, and energy consumption and requirements for devices are lowered; by means of the catalysis system, the gram-scale preparation can be conveniently achieved.

The invention discloses a low-cost graphene quantum dot preparation method, which comprises the following steps of S1, weighing a first preset quantity of carbon-containing raw materials; putting thematerials into a reaction container; S2, weighing a second preset quantity of oxidizing agents; adding the oxidizing agents into the reaction container; S3, performing ultrasonic dispersion treatmenton the mixed solution in the reaction container; S4, heating the mixed solution in the reaction container at the preset temperature; S5, cooling products after the reaction. The steps in the preparation process are simple; the slashing reagent/reaction conditions and post treatment purification procedures are not needed; the yield is as high as 80 percent or higher; the expansion to mass production in an environment-friendly mode can be realized. The prepared graphene quantum dots can be stably dispersed into water; the characteristics of single dispersion, stable structure, few impurities andthe like are realized.

The invention discloses a production method for nutrient soil. The production method is characterized by comprising the following steps of taking 1 m <3> by volume of straws, cutting the straws into small straw sections with the length of about 10 cm, degrading the straws into small granular active molecules after solid fermentation, and preparing the nutrient soil by mixing nitrogen fertilizer, potassium fertilizer and phosphate fertilizer. According to the production method, the straws are degraded into the small granular active molecules by using the solid fermentation of the straws; the small granular active molecules can be used as an organic fertilizer, so that destruction to ground-surface environment and atmosphere environment during a straw burning process can be prevented.

The invention provides a CIPP pipeline structural repairing method. The method comprises the following steps that S1, the upstream and the downstream of a pipeline to be repaired are blocked, the interior of the pipeline to be repaired is cleaned, and flatness repairing treatment is conducted; S2, a polyester resin mixed solution is used for impregnating a basalt-reinforced CIPP lining hose, the basalt-reinforced CIPP lining hose comprises three layers of materials including a CIPP lining inner film, a CIPP lining composite material and a CIPP lining outer film in sequence from inside to outside, the CIPP lining composite material comprises five layers of materials including a polyester resin layer, a felt layer, a fiber woven layer, a felt layer and a polyester resin layer in sequence from inside to outside; S3, the basalt-reinforced CIPP lining hose is introduced into the pipeline to be repaired, and the basalt-reinforced CIPP lining hose is attached to the inner wall of the pipelineto be repaired; and S4, the basalt-reinforced CIPP lining hose is subjected to curing treatment. The method has the beneficial effects that the basalt-reinforced CIPP lined hose has higher tensile strength and shear strength, better mechanical properties and longer service life, and can be used for structural repair of pressure pipelines.

The invention relates to an airplane electric transmission braking system for improving the braking capacity in a take-off line and a control method. A control box respectively receives a braking command voltage signal sent by a braking command sensor and an airplane wheel speed voltage signal provided by an airplane wheel speed sensor; the control box sends a braking anti-skid control current signal to an electro-hydraulic servo valve. The electro-hydraulic servo valve is arranged on a hydraulic pipeline in an airplane main undercarriage cabin. A hydraulic control valve is arranged on a hydraulic pipeline output by a braking port of the electro-hydraulic servo valve. When braking in the take-off line, when a hydraulic brake pressure output by the electro-hydraulic servo valve is greater than a preset value, the hydraulic control valve is started, an oil path is switched, and the high-pressure hydraulic pressure of a pressure supply source of a braking system is directly output to an airplane wheel braking device to carry out take-off line braking operation. According to the airplane electric transmission braking system for improving the braking capacity in the take-off line and the control method, the control box interferes and controls a braking control current of the electro-hydraulic servo valve to interfere and control the hydraulic control valve to switch the oil path, sothat dangerous consequences caused by misjudgment and misuse of the take-off line braking are avoided, the take-off line braking reliability is effectively improved, and safe and reliable use of theairplane is ensured.

The invention discloses a one-step method enzyme-linked immunosorbent assay method and kit for detection of beta-excitants and belongs to the technical field of immunodetection. The kit comprises beta-excitant specific antibodies, an ELISA plate coated with beta-excitant specific antibodies, beta-excitant horse radish peroxidase markers, clenbuterol standard substances, an enzyme-labeled substance diluent, a developer, a cleaning solution, a stopping solution and a concentrated sample diluents. The kit has advantages of high sensitivity, strong specificity, high precision, high accuracy, low requirements to instruments and devices, long reagent storage life, high automaticity, no radioactive isotope pollution and the like, and can play an important role in detection of animal-origin food and feed-products.

The present invention discloses one kind of elevator for cooling bench in steel rolling production line and capable of operating in dusty and misty environment for long period. The elevator includes uprights and movable elevating rack, which are connected through nuts and lead screws for transmission. It features that inner guide wheel and outer guide wheel fitting separately to the inner and outer guide surface of the uprights are installed separately on two ends of the inner guide wheel axle and on two ends of the outer guide wheel axle on movable elevating rack, and that self-lubricating thrust bearings are set between the inner guide wheel and outer guide wheel and the movable elevating rack. Owing to the self-lubricating thrust bearings with high positioning precision, high bearing capacity, self lubricating and less rusting, the present invention can operate in heavy load dusty and misty environment for long period reliably.

The invention relates to a folk culture full-automatic beaten iron openwork and scrap iron recycling system. An intermediate frequency furnace is used for rapidly melting metal iron, molten iron flowsinto a melt spoon on a circulating walking vehicle through a melt outlet, the circulating walking vehicle brings the molten iron to a beating motor to be beaten, the performance wonderful scenery ofiron openwork beating can be formed, the melt outlet is controlled by a melt opening switch drive mechanism, a graphite baffle can be pulled open for controlling the molten iron flow, after the iron openwork is beaten or in the process of beating the iron openwork, an electromagnetic collecting bar can automatically recycle the cooled scrap iron, the complete full-automatic beaten iron openwork and scrap iron recycling system can be formed, the system is clear and reasonable in control logic, rapid layout is achieved, the melting efficiency is high, the scrap iron can be recycled and reused, at the different positions, iron openwork beating can be carried out, and the beating speed and strength are controllable.

The invention discloses a method for culturing human melanocyte based on an asymmetric membrane. According to the method, an asymmetric membrane with excellent biocompatibility is constructed by utilizing the tissue engineering technology, and the melanocyte or melanocyte, fibroblast and keratinocyte are cultured and transferred or co-cultured and co-transferred. The method is suitable for adjusting depigmentation, such as leukoderma, and skin color adjustment. The invention relates to the preparation of the asymmetric membrane and construction of a cell-asymmetric membrane composite material. The asymmetric structure is introduced into the membrane material, so that cell culture and activity maintenance can be promoted.

The invention relates to the field of catalytic materials and in particular provides a titanium silicalite molecular sieve, a preparation method and application of the titanium silicalite molecular sieve. The titanium silicalite molecular sieve is composed of the following elements: precious metals, silicon, titanium and oxygen, wherein the I960/I550 value of the titanium silicalite molecular sieve is 0.5-0.9; the U480/U330 value of the titanium silicalite molecular sieve is 0.5-5; and the N-117/N-114 value of the titanium silicalite molecular sieve is 0.01-0.25. The invention further providesa cyclic ketone oxidation method. The cyclic ketone oxidation method comprises the following step: contacting cyclic ketone, an oxidizing agent and a catalyst, wherein the catalyst contains the titanium silicalite molecular sieve disclosed by the invention. Compared with the prior art, the titanium silicalite molecular sieve disclosed by the invention has the advantages that diffusion of the reactants and product is facilitated in an oxidation reaction, so that oxidative activity is fully achieved, and the selectivity is improved. For example, when applied to a reaction in which ring molecules, particularly cyclic ketone molecules, participate or are produced, the titanium silicalite molecular sieve can achieve excellent catalytic effects. Moreover, filtration and separation of the catalyst after the reaction can be further facilitated, and industrialized application is easily realized.