35results about How to "No need to break" patented technology

The invention discloses a method for preparing an Al2O3 / TiC coated hard alloy based on a liquid phase sintering process, which is characterized in that the Al(OH)3 / Ti(OH)4 core / shell structure sol is firstly prepared by a liquid phase method , and then spin-coated on the surface of the solid-phase sintered cemented carbide blank with a density of 85% to 95% to form an Al2O3 / TiO2 layer, and then use the CO atmosphere in the liquid-phase sintering process to undergo a carbothermal reduction reaction with the surface layer to make TiO2 Converted to TiC, and finally produced Al2O3 / TiC coated cemented carbide. The process of the invention is simple, easy to control, and avoids the problem of step-by-step vapor deposition of two coatings in the manufacturing process of Al2O3 / TiC coated hard alloy, and the step-by-step problem of coating treatment and substrate preparation, based on liquid phase sintering The process prepares Al2O3 / TiC coated cemented carbide in one step.

The invention discloses a copper-containing sludge sintering method, comprising: igniting a primer layer and moving the primer layer from a first end to a second end; during the movement of the primer layer, at least Two feeding points, the material to be sintered is added in layers and layers; and the oxygen-containing gas flow is fed from the bottom of the primer layer to realize combustion support; wherein, the material to be sintered is added to the bottom fire layer at the first charging point near the first end After that, each feeding point is sequentially fed to the previous feeding layer to form a multi-layer feeding layer; the material to be sintered is a mixture of copper-containing sludge and fuel, or a pellet made of the mixture; the first feeding point is charged or before each subsequent feeding point, the primer layer or the previous feeding layer has been fully ignited; The temperature of the upper part of the layer is determined; the oxygen-containing gas stream is formed by mixing a part of the flue gas passing through the material layer with the new oxygen-containing gas stream.

The invention relates to a high intensity microporous mullite refractory aggregate and a preparation method thereof. The technical solution thereof is: first using 50-70wt% of kaolin fine powder and 30-50wt% of active alpha-Al2O3 micropowder as raw materials, and additionally adding raw materials of 2-5wt% of dextrin, 1-5wt% of metal aluminum powder and 1-3wt% of carbon black for mixing evenly to obtain a mixture; evenly mixing the raw materials of 3-10wt% of alumina sol, 1-3wt% of silica sol, 0.5-1.0wt% of spodumene and 2-8wt% of water to prepare slurry; placing the mixture in a disk for pelleting, and spraying the slurry while pelleting to prepare particles with a particle size of 1-10mm; and naturally drying the particles, then drying same under the condition of 100-110 DEG C, then rising the temperature to 1200-1600 DEG C, maintaining the temperature for 2-4h, naturally cooling, and screening to prepare the high intensity microporous mullite refractory aggregate. The invention has characteristics of simple process and low preparation power consumption, and the prepared product has great compression strength, high using temperature, low volume density, and small heat conductivity coefficient.

Provided are a coated magnetic abrasive particle and a preparation method thereof. The iron ion based molar ratio of iron dichloride to ferric chloride of the coated magnetic abrasive particle is 1 to 1-3, the molar ratio of Fe ions to ammonia water ammonia ions is 1 to 2-7, the mass ratio of ferroferric oxide to a modifying agent is 1 to 5, an ethyl alcohol-water solution is prepared according to the ethyl alcohol-water proportion of 1 to 5, and the volume ratio of tetraethoxysilane to the solution is 1 to 20-30. Preparation is performed according to the volume ratio of ammonia water to the solution. The preparation method comprises the preparation steps that 1, the iron dichloride, the ferric chloride, the ammonia water, the modifying agent, ethyl alcohol, the tetraethoxysilane and distilled water are weighed; 2, the distilled water and the ferric chloride and the iron dichloride are mixed and prepared into a solution; 3, the ammonia water is added for stirring; 4, drying is performed; 5, a drying product, an activator and distilled water are prepared into a solution, and dispersion is performed; 6, the alcohol-water solution is added for stirring; 7, the tetraethoxysilane is dropwise added; 8, the ammonia water is dropwise added and is stirred; 9, drying is performed after product suction filtration. The coated magnetic abrasive particle is low in cost and easy to recover.

The invention discloses a device and method for simulating influences of underground water on coalbed methane. The device comprises a sample bin and a high pressure gas bottle. The sample bin is mainly composed of a pressure tank. The whole pressure tank is in a cylindrical shape and formed by separably combining two semicylinders. The pressure tank is provided with a pressure meter and a gas-water separator. The pressure tank and the high pressure gas bottle are communicated. The device and method are simple, effective, applicable to large-size coal samples without breaking and capable of adapting to inspecting influences of different pressure, water qualities, coal qualities and coal-water ratios on coalbed methane storage.

The invention discloses a watertight connector of a low separating force, and the connector can be used for cable connection between a power cabin and a recoverable cabin of recoverable acoustic UWSN nodes. The watertight connector comprises an upper installation body and a lower installation body, the upper installation body is installed in the recoverable cabin, and the lower installation body is mounted in a structural body of the power cabin. A traditional pin-and-jack type watertight connector realizes sealing via interference fit between pins and jacks, the axial resistance is high during separation, and separation cannot be realized without labor force or other auxiliary devices. When the watertight connector of the low separating force is in a connected state, a preload spring ensures reliable electrical connection between a copper cone and a copper cap of a conductor, and non-rigid connection is characterized by that cables are not broken during separation, the separating force is low, separation is rapid, and the sealing performance is high after separation.

The invention discloses a retractable segment for being removed in a tunnel and a construction method. The problems of difficult removal and unrepeatable use of a shield segment are solved, and by arranging telescoping members and moving wing plates at the positions of top sealing blocks, the segment can be removed in the tunnel without breaking and can be reused. According to the technical scheme, the retractable segment comprises a plurality of standard blocks which are connected to form an arc-shaped structure in an adjacent surrounding mode, adjacent-connecting blocks are closely attachedto both ends of the arc-shaped structure, the top sealing blocks are arranged between the adjacent-connecting blocks, and the standard blocks, the adjacent-connecting blocks and the top sealing blocksconstitute a cylindrical structure; and the moving wing plates are arranged on the two sides of the top sealing blocks, the telescoping members are arranged in the top sealing blocks, the telescopingmembers are connected with the moving wing plates, and the telescoping members can drive the moving wing plates to rotate or move to abut against the adjacent-connecting blocks.

The invention discloses an embedded type vehicle type recognition system based on a virtual coil. The embedded type vehicle type recognition system comprises an external program and data memorizer, an external high-speed dynamic memorizer SDRAM, an image collecting device, an image AD sampling module, a power source control module, a dual-core DSP digital signal processor chip, a virtual coil distinguishing unit and a vehicle type recognition unit. The image AD sampling module is used for acquiring the video image date provided by the image collecting device. The dual-core DSP digital signal processor chip is used for calling the virtual coil distinguishing unit to carry out virtual coil distinguishing on the collected video image to select the keyframe image emerging when a vehicle appears. The dual-core DSP digital signal processor chip is used for calling the vehicle type recognition unit to carry out vehicle type recognition calculation on the keyframe image. The embedded type vehicle type recognition system can extract characteristic values about the vehicle from the video image information and carry out structuring description with the cooperation with the virtual coil, the type of the vehicle in the video image can be recognized, and a video monitoring system can be applied and managed intelligently and conveniently.

The present invention relates to a method for producing sanitary ceramics by using waste quartz sand. Its main raw materials including waste quartz sand, violet wook knot, clay, raw material, feldspar, waste ceramics, talcum and electrolyte, and its production process includes the procedures of breaking, ball-grinding, injection-forming, glazing and baking to obtain finished product.

The invention discloses vibrio natriegens HJPH YXJ-1 for producing agarase and application of the vibrio natriegens; the strain is preserved in China Center for Type Culture Collection with preservation number of CCTCC M 2015244 on April 23, 2015, wherein the China Center for Type Culture Collection is located in Wuhan University, and post code is 430072. The agarase generated from the strain is an extracellular enzyme, which is simple in separation and purification and is free from cell breakage; enzyme-producing activity is relatively high, and under optimized conditions, the activity of unpurified crude enzyme reaches 103U / mL; to degrade agar, the agarase produced from the strain is mild in reaction condition, good in specificity and free from environmental pollution, and the is suitable for the large-scale preparation of neoagaro-oligosaccharides.

The invention belongs to the technical field of surface finishing processing of mechanical parts. In order to solve the problems that during traditional magnetic abrasive particle preparation, an abrasive grain phase and a magnetic medium phase are mixed unevenly, and crushing is very hard, the invention provides a method for preparing magnetic abrasive particles through a sol-gel method. Carbonyliron powder, citric acid and distilled water are mixed to prepare a solution, the solution is dried, and dried powder is ground into iron-based particles; aluminium isopropoxide is dissolved in deionized water, HNO3 is dropwise added into an aluminium isopropoxide aqueous solution, after dropping is completed, water-bath heating and stirring are conducted to form alumina sol; the dried ground iron-based particles are added into the alumina sol, stirring is conducted to form iron-based alumina sol, and after ageing is conducted at a room temperature, drying is conducted in a drying box to formthe Fe-AlOOH magnetic abrasive particles. A process is simple, easy, fast and convenient, and the magnetic abrasive particles are smaller in particle size; crushing and screening are not needed; theperformance of the abrasive particles is improved, and the service life of the abrasive particles is prolonged; the particles are small, the process is simple, crushing is not needed, the magnetic response performance is good, the cost is low, and recovery is easy.