1047results about How to "Conducive to energy saving and emission reduction" patented technology

The invention relates to a high-strength water-proof gypsum plaster and a production method thereof. The inventive high-strength water-proof gypsum plaster is made from the following materials in weight proportions: 10-99% of gypsum-based composite binding agent, 0-90% of aggregates, 0.08-4% of additives and 0-16.1% of adsorbent. The production method comprises the following steps: weighing raw materials at the given ratio, drying the aggregates, mixing all raw materials, and packaging. The inventive high-strength water-proof gypsum plaster has high strength and good water resistance; can be made from chemical gypsum materials without needing calcination, such as desulfurized gypsum, phosphogypsum, fluorgypsum and citric acid gypsum; and has the advantages of low production cost, energy conservation, discharge reduction and environmental friendliness.

The invention provides a secure mobile terminal electronic authentication method and system. The secure mobile terminal electronic authentication system comprises a secure element (SE) which is arranged in a mobile terminal and can store a key, and a trusted execution environment (TEE) which is arranged in the mobile terminal; a secure application applet which can run in the secure element is arranged in the secure element (SE); the secure application can generate a public-private key pair for electronic signature; and a private key is stored in the secure element (SE) and cannot be exported or duplicated. A secure redisplay trusted application (TA) is arranged in the trusted execution environment (TEE), so that transaction correctness can be confirmed artificially by a user and the transaction cannot be attacked by trojan horse in a rich execution environment (REE). The secure mobile terminal electronic authentication method and system greatly reduce high cost caused by additionally required production of hardware devices, solve the problem of using and carrying inconvenience for the user, are conducive to energy conservation and emission reduction, and save the social resources.

The invention relates to a waterproof high-strength gypsum-based concrete brick or building block and a production method thereof. The waterproof high-strength gypsum-based concrete brick or building block mainly contains gypsum-based composite binding agent, coagulation accelerator and filler. The weight proportions of the components are as follows: 10-100% of gypsum-based composite binding agent, 0-6% of coagulation accelerator, 0-90% of filler, 0-1% of early-strength agent, 0-1% of water-reducing agent, 0-6% of lime and 0-15% of gypsum hemihydrate. 80% of the raw materials of the high-strength gypsum-based concrete brick or building block are industrial byproducts, so that the invention reduces the production cost, realizes energy conservation and discharge reduction, avoids the land occupancy and water pollution caused by chemical gypsum, ore slag, coal ash, furnace slag, alkali waste and carbide slag, and protects the environment.

The invention provides a method for directly producing high-purity electronic level cobaltous sulfate by using cobalt-containing waste, in particular a process for producing cobaltous sulfate by using cobalt-containing waste. The method comprises the steps of: checking and classifying raw materials, wet-milling and size-mixing, acid-decomposing, filtering, washing, separating, and extracting copper sponge. The method is characterized by also comprising the steps of: removing iron with a goethite process, extracting P2O4 and removing impurities, separating nickel from cobalt, extracting N235, purifying, concentrating and crystallizing. The high purity electron level cobaltous sulfate is directly regenerated by using various kinds of cobalt wastes, the requirement of the modern high-technology industry on high purity of the cobaltous sulfate is met; the total recovery of the cobalt is higher than or equal to 98 percent; various usable elements can be comprehensively recycled, and coppersponge, tungsten carbide, iron hydroxide and nickel carbonate can be regenerated while the electronic level cobaltous sulfate as a main product is regenerated. The invention has the advantages of comprehensively utilizing waste cobalt resources, recycling the wastes, improving the enterprise benefit, and being beneficial to the development of energy conservation, emission reduction, environment protection and circular economy.

The invention discloses an automatic speed changer. The automatic speed changer comprises a gear range gear transmission system and a gear shift mechanism execution system and is characterized in that: the gear shift mechanism execution system comprises an operating control device, a reverse action device and a transmission shifting device; the reverse action device comprises a control frame, a driving frame, a driven frame and a spring; the driving frame is elastically connected with the driven frame through the spring; the driving frame and the driven frame are in axial slide fit with the control frame respectively; the slide stroke of the driving frame is larger than that of the driven frame, and the middle point of the slide stroke of driving frame and the middle point of the slide stroke of driven frame are on the same plane; the operating control device can make the driving frame move so as to force the driven frame to reversely move; and the driven frame is moved to make the transmission shifting device force the gear range gear transmission system to shift so as to change the speed. The automatic speed changer has the advantages of high transmission efficiency, variable gear ranges and long service life, can be assembled on various motor vehicles and agricultural machinery and can save power and fuel when used.

The invention discloses an aluminum oxide ceramic substrate with high heat conductivity. The aluminum oxide ceramic substrate is prepared by steps of stirring a ceramic powder material, a binder, a plasticizer, a dispersant and a solvent uniformly, preparing a ceramic raw-ceramic substrate through a tape casting method, glue discharging and sintering. The aluminum oxide ceramic substrate is characterized in that the solvent is a mixture of butanol, isopropanol and butyl acetate, and the ceramic powder material comprises aluminium oxide powder and auxiliary agents. The invention also discloses a preparation method for the aluminum oxide ceramic substrate with the high heat conductivity. According to the aluminum oxide ceramic substrate and the preparation method, the solvent system which comprises the butanol, the isopropanol and the butyl acetate are used as the main solvent in place of traditional toluene, thus enhancing dissolution of PVB by the solvent, thereby guaranteeing uniformity of raw ceramic slurry, making physical properties of sintered ceramic stable, reducing environmental influences of the exhausted gas during production processes compared to traditional modes of production, contributing to energy conservation and emission reduction, and reducing the cost.

The invention discloses an electronic parking controlling system with a redundant parking function. The electronic parking controlling system comprises an EPB electronic controlling unit and a caliperactuator. The EPB electronic controlling unit comprises an electronic parking controlling module and a power supply management circuit. The parking controlling system is internally provided with a redundant parking controlling unit. The redundant parking controlling unit comprises an EPB switch, a gradient sensor module and a motor driving module which are in the EPB electronic controlling unit,and is further provided with a redundant parking controlling module and a redundant module power supply management circuit. The redundant parking controlling module is connected with the electronic parking controlling module through a plurality of signal lines. By means of the technical scheme, not only can the normal parking function and the emergency braking function be met, but also the P-gearlocking mechanism function of an automatic gearbox can be replaced, the safety of parking is improved, and the electronic parking controlling system has the advantages of low cost, convenient arrangement and the like.

The invention discloses a parking guidance system based on LBS (location based service). The parking guidance system consists of a parking lot server side, a server and a client side, wherein, the parking lot server side comprises an exit sensor and an entrance sensor which are respectively arranged on lifting levers at an exit and an entrance of a parking lot, and the sensors collect parking space information of the parking lot in real time and send the information to the server; the client side acquires car position information through a positioning module and then sends the information to the server; and according to the received parking space information of the parking lot, the server selects three parking lots based on a near-to-far distance and low-to-high charges principle, and sends the position information of the parking lots to the client side. The parking guidance system based on the LBS has the characteristics of realizing convenient and fast parking, fully and reasonably utilizing resources and facilitating energy conservation and emission reduction.

The invention relates to a sintering expansion type light ceramsite produced by using oily sludge and a manufacture method of the sintering expansion type light ceramsite. The manufacture method is characterized by comprising the following steps of: uniformly mixing raw materials including oily sludge, building waste residue, waste energy-saving lamp residue, boiler waste residue, wood material processing waste residue, calcium oxide, calcium sulfate, carboxymethylcellulose, calcium carbonate, ferric sulfide, a polycarboxylate superplasticizer, ferrous sulfate, magnesium sulfate and water by using a dual-shaft mixing and stirring machine, manufacturing into spherical particles with diameters of 5-20mm by using a disc pelletizing machine, drying, roasting by using a dual-cylinder rotary kiln, controlling the temperature to be 1,050-1,200 DEG C and the time to be 10-25 minutes, cooling and discharging from the kiln, then screening and manufacturing to be a sintering expansion type light ceramsite product. The sintering expansion type light ceramsite product has the advantages and effects of being light in weight, preserving and insulating heat, absorbing and insulating sound, comprehensively utilizing and recycling solid waste resources, and being free of pollution, low in cost and good in benefit, and accords with the requirements of saving energy, reducing emission, protecting environment and developing low-carbon economy in China.

The invention discloses a method for modifying a nano metal oxide by coupling graft, and belongs to the technical field of nano granule surface modification. The nano metal oxide is used as a raw material, N,N'-carbonyl diimidazole (CDI) is used as an activating agent, and a finished product is obtained by simple processes of drying treatment, coupling reaction, separation and purification, coupling graft, re-separation and re-purification. The method has the advantages of simplicity, mild reaction conditions, high grafting efficiency which reaches 87 percent, energy conservation, emission reduction, low cost and suitability for large-scale industrial production. The nano metal oxide prepared by using the method can be widely applied in the fields of rubber, coating, ink, dye, glass, piezoelectric ceramics, photoelectrons, medicament and the like.

The invention discloses porous high-entropy alloy and a preparation method thereof and belongs to the field of porous foam metal. The preparation method of the porous high-entropy alloy specifically comprises the steps that high-entropy alloy powder and screened pore-forming agents are mixed proportionally according to the requirements for the porosity and the pore size, and the high-entropy alloy powder and the screened pore-forming agents are sintered through spark plasma sintering (SPS) directly after being uniformly mixed by a blender mixer; after sintering is completed, a sintered sample is put into deionized water to be subjected to ultrasonic cleaning, and particles of the pore-forming agents are removed by using the characteristic that the pore-forming agents are soluble in water; and finally the porous high-entropy alloy is obtained. The preparation method is simple in process, particularly, the preparation time is shortened greatly through the SPS method, and the efficiency is improved. The prepared porous high-entropy alloy has the characteristics of being high in porosity, uniform in pore size distribution, controllable in porosity and pore size and the like and has potential application prospects in the fields of biology, petroleum, metallurgy, chemical industry and the like.

The invention discloses a direct current variable frequency multifunctional air conditioning system comprising a multi-online air conditioner, an afterheat recycling device, a hot pump water heater and a floor radiation heating system; one end of the afterheat recycling device is communicated with a flow adjusting pipe (6), and the other end of the afterheat recycling device is communicated with a high pressure fluid storing device (20) through a second condenser (18); the hot pump water heater is connected with the afterheat recycling device in parallel; and both ends of the floor radiation heating system are respectively connected with both ends of an indoor multi-linked machine (28) in parallel. The core content of the control method of the system is as follows: the starting or stopping of the direct current variable frequency compressor or the fixed frequency compressor can be determined according to the comparison between the water outlet temperature or the environment temperature and the target set temperature. Thus, when these systems are mounted, only one set of basic control device is required to mount without independent installation respectively; therefore, the system and method have few primary investment and low cost; simultaneously, these functions are performed on one operation system, and the operation is very convenient; furthermore, the system and method are beneficial to saving energy and reducing emission.

The invention provides a midway charging system for an electric vehicle. The electric vehicle is provided with a pantograph (301), a charging grid (10) is arranged along a road, and an insulating protection shell (101) is arranged on an outer layer of the charging grid (10); base stations (20) are arranged at certain intervals in the charging grid (10); when the pantograph (301) enters a preset range of one of the base stations (20), the base station (20) acquires the identification information of the electric vehicle (30) through near-field communication and remotely transmits the identification information to a management center (40), and the management center (40) authenticates the identification information; and under the condition that the identification information passes authentication, the management center (40) remotely controls the base station (20) to open the insulating protection shell (101) to allow the pantograph (301) to be contacted with the charging grid (10) for charging the electric vehicle, and the management center (40) performs billing and management. By adoption of the midway charging system for the electric vehicle, timely and convenient electric energy supplementation of the electric vehicle is ensured, the construction cost of a charging station is reduced, and the problem about charging of the electric vehicle in the prior art is fundamentally solved.

The invention provides an ocean thermal energy conversion method and an ocean thermal energy conversion device. The method comprises the following steps of: heating a low-boiling-point working medium by using hot seawater on a surface of ocean; evaporating the low-boiling-point working medium; feeding into a turbine to push a turbo generator set to work for power generation; condensing working medium gas which is exhausted from the turbine into liquid by using cold seawater on a deep layer of the ocean; heating by using the hot seawater; feeding into the turbine to make the working medium gasevaporated; pushing the turbo generator set to work for the power generation; cyclically executing the steps; and continuously carrying out power generation. Power is generated by using ocean surfacewind power, a heat pump device is driven by the power, the temperature of the working medium is further raised by using a medium of the heat pump device, and the volume expansion ratio of the workingmedium is improved; and the temperature of the cold seawater is further reduced by using the medium of the heat pump device, the working medium exhausted gas is condensed by using the low-temperatureseawater, and a condensing effect of the working medium exhausted gas is improved. The method and the device improve the efficiency of closed cycle generation of ocean thermal energy conversion, realize the comprehensive utilization of ocean thermal energy and wind energy, have an important practical value, provide environment-friendly energy sources, and are easy to use and promote in large scale.

The invention discloses a low-temperature, high-hardness and high-abrasion-resistance fully-polished glaze which contains a base material and an admixture. The base material is prepared from, by weight, 15-25% of albite, 8-16% of potassium feldspar, 6-10% of kaolin, 5-8% of calcined talc, 5-10% of dolomite, 4-12% of barium carbonate, 3-5% of calcined zinc oxide, 4-20% of transparent frit, 16-28% of high-temperature frit, 5%-18% of quartz and 7-15% of alumina micro-powder, wherein the admixture is an organic silicon nano-solution or white carbon black, and the usage amount of the admixture is 15-2% by weight. In addition, the invention further discloses a preparation method of the low-temperature, high-hardness and high-abrasion-resistance fully-polished glaze and a product prepared by the same. The melting temperature is reduced through a reasonable formula system, the melting temperature range of the glaze is enlarged while energy saving and emission reduction are promoted, the hardness and abrasion resistance of the glaze surface are remarkably improved, the higher usage requirements can be very well met, and technical progress and application development of the industry of architectural ceramics are promoted.

The invention discloses a high-energy-storage sodium bismuth titanate-strontium titanate matrix material. The chemical formula of the high-energy-storage sodium bismuth titanate-strontium titanate matrix material is 0.5Bi0.5Na0.5TiO3-0.5SrTiO3-x wt%MgO, wherein x=0.5-3.0. A preparation method of the high-energy-storage sodium bismuth titanate-strontium titanate matrix material comprises the following steps of preparing SrCO3, TiO2, Bi2O3, Na2CO3 and MgO by weight ratio according to the chemical formula into a ceramic powder, performing ball milling, drying and pelletizing, and then pressing the ceramic powder in a tablet press into a ceramic blank; rubber-discharging and sintering the ceramic blank inside a muffle furnace to obtain a ceramic sample. The preparation method of the high-energy-storage sodium bismuth titanate-strontium titanate matrix material is simple in preparation process, low in cost and free from pollution; the prepared high-energy-storage sodium bismuth titanate-strontium titanate matrix material achieves a high discharging energy storage density of 1.61-2.17 J / cm3 and a high breakdown strength of 137-226 KV / cm.

The invention discloses a method for recycling water-containing sump oil by utilizing a delayed coking device. The method comprises the following steps: (1) injecting water-containing sump oil into a steam blowing exhausting pipeline of a coke chamber when the coke chamber of the delayed coking device is subjected to large steam blowing and coke cooling process, wherein the water-containing sump oil is heated by high-temperature oil gas from the coke chamber; (2) gasifying water and light oil fractions in the water-containing sump oil, mixing the gasified water and light oil fractions with cooled oil, oil gas and steam from the coke chamber, and allowing the mixed oil gas to enter an emptying tower; and (3) distilling off the steam and light oil fractions from the top of the emptying tower, condensing, cooling, allowing the steam and light oil fractions to enter a liquid separation tank on the top of the emptying tower, and separating non-condensable gas, light sump oil and sulfur-containing sewage from the liquid separation tank, wherein heavy oil fractions are extracted from the bottom of the emptying tower. According to the method disclosed by the invention, the water-containing sump oil which is difficultly treated in an oil refinery is treated, the cooling load and energy consumption of the coking device are reduced, and the method is not influenced by the properties of the water-containing sump oil. The energy conservation and emission reduction in a refinery plant are promoted, and a certain economic benefits are created for the refinery plant.

The invention belongs to the technical field of polymer materials, and relates to a lightweight flame retardant modified polyamide material and its preparation method. The material comprises the following components by weight: 100 parts of nylon 66, 0-60 parts of glass fiber, 16-28 parts of a flame retardant, 5-15 parts of hollow glass bead, 5-18 parts of a compatibilizer, 0.3-1 part of an antioxidant and 0.3-1 part of a lubricant. The prepared lightweight flame retardant modified polyamide material is low in density, meets the lightweight requirements of modern society on materials, is conducive to energy saving and emission reduction, and has the characteristics of good processing fluidity, excellent surface quality, outstanding physical mechanical properties.

The invention discloses a cultivation material of pholiota nameko. The cultivation material is characterized in that pruned branches of fruit trees are adopted as main raw materials, bran, gypsum and sugar are adopted as auxiliary materials, and the water content of the cultivation material is 64%-65%. The content of the invention also comprises a manufacturing method of the cultivation material. Compared with the conventional cultivation material of hardwood chips, the cultivation material has two aspects of advantages that (1) the channel of the cultivation material is expanded, and the production cost is reduced; and (2) since the content of the protein of the chips of the fruit tree branches is commonly higher than the hardwood chips to be beneficial to growth of the pholiota nameko mycelium, in bag making, the adding amount of the bran and the sugar is saved, the pholiota nameko growing is neat, the yield is high and the quality is good. The cultivation material disclosed by the invention has the social benefit that the branch chips of the fruit trees are used for replacing the wood chips, so that a part of the contradiction between the bacterium and the forest can be relieved, the wastes are changed into valuables and the benefit to saving energy and reducing emission is achieved.

The invention provides a remote energy efficiency diagnosis method and diagnosis system. The remote energy efficiency diagnosis system comprises an energy monitoring terminal, an energy data acquisition module, an energy statistical analysis module, an energy loss diagnosis module and an energy decision supporting module, wherein the energy monitoring terminal is used for acquiring and monitoring various energy data on enterprise sites; the energy data acquisition module is used for transmitting the energy data to a master station system; the energy statistical analysis module is used for statistics and analysis of various basic energy data; the energy loss diagnosis module is used for analysis and diagnosis of energy loss; and the energy decision supporting module is used for generating aid decision for energy transformation and energy-saving strategy. The invention also provides a method for safe and reliable remote diagnosis of energy.

The invention provides a method for enhancing recovery ratio of coal-bed gas by injecting hot carbon dioxide into a coal bed, which comprises the following steps: 1) after implementing a coal-bed gas multi-branch horizontal well on the ground, draining water of a single well to reduce the pressure, and naturally generating gas until the yield is lower than the industrial gas flow standard; 2) draining water to reduce the pressure, and injecting hot carbon dioxide into the well, wherein the temperature of the injected hot carbon dioxide is 180-220 DEG C, and the injection pressure does not exceed 5 MPa; 3) shutting in the gas well for soaking; 4) draining water to reduce the pressure, and generating gas; 5) separating carbon dioxide and coal-bed gas from the generated gas; and 6) repeating the steps 2)-5) until the yield is lower than the industrial gas flow standard, and shutting in the well. The method provided by invention can effectively lower the coal-bed methane content and greatly enhance the coal-bed gas yield, thereby achieving the goal of industrialized development of coal-bed gas.

The invention relates to a control method of AGC facing a control performance standard (CPS) and a control system thereof. Through setting structures of a data acquisition and pretreatment portion, an AGC total power calculating portion, an AGC total power distribution portion, a parameter set interface, an AGC state monitoring portion and the like, based on a frequency difference expectation, AGC regulating variable can be determined and an integral control link is canceled so that AGC set adjustment times can be effectively reduced. Set wear can be greatly reduced and energy consumption can be effective reduced too. The method and the system are beneficial to realize energy saving and emission reduction for power grid.

The invention relates to a preparation method of ternary system material, in particular to a preparation method of lithium cobalt nickel manganese oxide ternary system material for lithium ion batteries. The invention applies ensured ternary system material salt as raw material. After needed matching weight, by means of eve dissolving and mixing, a composite metal oxide prepared by a spray-roasting method is used as a fore body. The fore body is mixed with a lithium-source compound according to the substance amount of 1:1-1.5, and then roasting is carried out at the temperature of 700 to 1000 degrees centigrade to obtain the ternary system material. The tail gases, such as vapor, acidic gas, generated in the spray-roasting process are absorbed by a washing tower to obtain acid. The invention has the advantages of advanced technique, stable production, low cost, no waste water discharge, environmental protection, high product purity, even granularity, high crystallinity, etc.

The invention discloses an energy complementation self power supply system, which comprises a solar energy power generation device, a wind energy power generation device, a methanol-water reforming hydrogen production power generation module, an AC DC power conversion device, an electrolytic hydrogen production device, a first methanol synthesis device, a methanol-water storage and conveying device and a load, wherein the solar energy power generation device and the wind energy power generation device provide power for the load and the electrolytic hydrogen production device; the electrolytic hydrogen production device is used for electrolyzing water for hydrogen production, the produced hydrogen is fed to the first methanol synthesis device for synthesizing methanol, in the condition of not sufficient solar energy and wind energy, the synthesized methanol is conveyed to the methanol-water reforming hydrogen production power generation module for hydrogen production and power generation, and power is provided for the load; and the methanol-water reforming hydrogen production power generation module comprises a reformer and a fuel cell, methanol and water are subjected to a reforming hydrogen production reaction in the reformer, the produced hydrogen is fed to the fuel cell, and in the fuel cell, the hydrogen and oxygen in the air are subjected to an electrochemical reaction, and power output is generated. Multiple energies generate power in a complementary mode, power supply continuity is good, and control is easy.

The invention belongs to the technical field of biodegradable materials, and discloses a bagasse / cassava starch polylactic acid biodegradable material and a preparation method thereof. The bagasse / cassava starch polylactic acid biodegradable material comprises the following components in percentage by mass: 5-20% of bagasse, 10-40% of cassava starch, 20-60% of polylactic acid, 5-20% of polycaprolactone, 0.5-3% of coupling agent, 0.5-5% of plasticizer, and 1-5% of lubricant and heat stabilizer. The preparation method comprises the following steps: uniformly mixing the components, adding into a double screw extruder, and carrying out extrusion granulation at the extrusion temperature of 80-140 DEG C at the screw speed of 40-100 r / min to obtain the bagasse / cassava starch polylactic acid biodegradable material. The material has favorable biodegradability and mechanical properties, and can be used for preparing daily plastic products.

The invention provides a modified polyester / cotton blended fabric and a dyeing method thereof. The fabric is blended by modified polyester and cotton, wherein the modified polyester is copolymerized by polyester and nylon 6, and has the structural unit as the specification, wherein m1 is more than 1 and less than 160, m2 is more than 1 and less than 70, m3 is more than or equal to 0 and less than 20, and m4 is more than or equal to 0 and less than 20; the blended fabric has the performance of normal-temperature normal-pressure dyeing, and soft handfeel and good antipilling performance with the antipilling grade over 3 grades. The invention also relates to a method for dyeing the blended fabric. An acid dye or an acid dye and a disperse dye are used for one-bath dyeing so as to simplify the dyeing process and contribute to energy conservation and emission reduction; and the dyeing temperature is below 100 DEG C to remarkably reduce energy consumption.

The invention belongs to the technical field of concrete additives in building materials and provides a polycarboxylate-type water reducing agent mother liquid, a preparation method and an application thereof. The polycarboxylate-type water reducing agent mother liquid is prepared from unsaturated polyoxyethylene ether, a chain transfer agent, unsaturated acid and / or unsaturated acid derivatives, an initiator and water. The polycarboxylate-type water reducing agent mother liquid is prepared through a one-step method. A water reducing agent is compounded from the mother liquid, preferably-selected slump-retaining components, a defoamer and water. The water reducing agent prepared from the mother liquid is low in doping quantity, is high in water reducing efficiency, is good in water retention and slump retaining effects and has good cement adaptability. The production process is simple, is less in investment and device and is low in cost. The polycarboxylate-type water reducing agent has excellent slump degree keeping capability, can significantly improve disintegration and bleeding in concrete, can improve operation performance, mechanical performance and durability of concrete, thereby improving building engineering quality and prolonging service life of buildings.

The invention discloses a speed changer capable of solving the problems of large size, complex operation, high maintenance cost, and the like of the traditional speed changer. The speed changer has about 97 percent of transmission mechanical efficiency and easy and convenient operation and is characterized in that a power input gear can be fixed with a jacket; a sliding sleeve is matched with thejacket through a helical rack and is matched with a gear shaft through a spur rack; a pin shaft of the sliding sleeve contacts with a push rod of a gear shift shuttle; a crank arm is movably connected with a lug through the pin shaft; a shifting fork forks on a shaft rod of a push-and-pull rod; a hollow cavity or a sliding chute of the gear shaft is internally provided with the gear shift shuttle; the gear shift shuttle is provided with a top bulge; the gear shaft is provided with a sliding key and is assembled with an angle gear matched with a chamfered groove strip and a plurality of gearshift gears; the gearshift gears can be respectively meshed with a driven gear; the driven gear is assembled on a driven shaft; and the driven shaft is fixed with a power output gear. The invention can be used for an epicyclic gear train and realize the full-automatic speed change from two gears to more than ten gears.

The invention discloses an inflaming-retarding flexible heat preservation facing material in building and a preparing method thereof, which is prepared from the following components in part by weight: 1-50 parts of soil particles, 1-50 parts of hollow filler, 1-10 parts of reinforced fibers, 10-50 parts of flexible emulsion, 0-1 part of pigment, 1-10 parts of accessory ingredient and 10-40 parts of water, that are mixed to form slurry with appropriate viscosity, are formed in a template with decorative patterns, so as to prepare a composite material with functions of inflaming retarding, heat preservation and decoration after gradient temperature control, drying and demoulding. According to the invention, the production process is environmental-friendly, the construction process is simple, convenient and feasible, and the inflaming-retarding flexible heat preservation facing material in building is particularly suitable for external facing of high-rise buildings and old town transformation.

A precision forging technology of tooth forms of duplex straight toothed spur gears is characterized in that a forging technology and a closed forging die are used to manufacture all the tooth forms of two-stage step cylindrical gears of a duplex straight toothed spur gear; according to the forging technology, a round cake blank is used for one-time heating, all the tooth forms are forged and formed at a time, the forging die structure for precision die forging is of a closed impression structure, a tooth-form female die is of a big-end-up split structure, a die upper punch is a split tooth-form male die, a die lower punch is a tooth-form cushion type die and also serves as an unloading die, and the dies are guided and positioned through four sets of guiding pillars and guiding sleeves. The technological process of forging includes the steps that material is prepared and heated, forging is performed on a no-bottom-dead-centre screw press or a die forging press with the closed impression forging die, hot forged pieces are inspected and cooled, two end faces and inner holes are mechanically machined, gear products are subjected to cementation heat treatment, the gear products are finally inspected, and products are packaged and put in storage.