84results about How to "Inner dense" patented technology

The invention discloses a large thickness steel plate for hydrogenation reaction chamber reeling equipment and a production method thereof. The steel plate takes Cr-Mo steel as the base, an amount of alloying elements, such as Ni, Cu, Al, Nb, Mn, Cr and the like are added, the contents of harmful elements, such as Sn, Sb, As, P, S and the like are controlled, and the finished large thickness steel is prepared by adopting the processes of electric furnace smelting, LF refining furnace refining, throwing down line stacking for slow-cooling, electroslag remelting, rolling and product forming, diffusion hydrogen annealing, normalizing and tempering heat treatment and the like. The thickness of the steel plate reaches 198 mm, the weight of single steel plate reaches 25 tons, the high temperature tensile strength and yield strength of the steel plate are good, the lower temperature toughness at minus 30 DEG C is good, the steel plate has good tempering embrittlement sensitivity coefficient, and the purity of the produced steel plate is high, the component is uniform, the inner part is compact, and the mechanical property is uniform. The steel plate can meet the operation requirement of hydrogenation reaction chamber reeling equipment, and is suitable for the production of the main structural parts of all hydrogenation reaction chamber reeling equipment.

The invention discloses a carbon-based composite material, a preparation method thereof and application thereof. The carbon-based composite material comprises micron-order soft carbon, micron-order hard carbon, a nano-active material, a first carbon coating layer and a second carbon coating layer, wherein the first carbon coating layer is coated on the surface of the nano-active material to form composite particles; the composite particles are dispersed on the surfaces of the soft carbon and the hard carbon and in the second carbon coating layer; the second carbon coating layer coats the softand hard carbon and the composite particles. The method disclosed by the invention comprises the following steps: 1) performing carbon coating on the nano-active material to form composite particles;2) dispersing the composite particles on the surface of the soft carbon and the hard carbon to form a first precursor; 3) performing coating modification by using an organic matter; 4) performing VC heating mixing or mixed kneading and molding; 5) sintering at a high temperature, thereby obtaining the composite material. The composite material disclosed by the invention is very suitable to serve as a negative electrode active material of the lithium ion battery, has high capacity and first charge and discharge efficiency and is excellent in rate capability.

The invention discloses a 690 MPa-grade hydrogen sulfide corrosion resisting steel plate. The steel plate comprises the following chemical components in percentage by mass: 0.14-0.16% of C, 0.20-0.40% of Si, 1.05-1.10% of Mn, 0.40-0.45% of Ni, P not more than 0.012%, S not more than 0.003%, 0.020-0.040% of Al, 0.020-0.030% of Nb, 0.035-0.040% of V, 0.01-0.02% of Ti, 0.30-0.35% of Cr, 0.25-0.30% of Mo, 0.0015-0.0020% of B, N not more than 0.010%, Cu not more than 0.20%, and the balance of Fe and inevitable impurities. A production method of the 690 MPa-grade hydrogen sulfide corrosion resisting steel plate comprises the procedures of heating, rolling and heat treatment. The 690 MPa-grade hydrogen sulfide corrosion resisting steel plate has such characteristics as high compactness, higher strength grade, excellent low-temperature impact toughness, excellent lamellar tearing resistance and excellent hydrogen sulfide corrosion resistance, can satisfy the requirements of hydrogen sulfide corrosion resisting steel for ship storage tanks, is excellent in comprehensive performance and welding performance, and is lower in cost.

The invention discloses a non-coherent spread spectrum communication device with variable data rate, which relates to realizing non-coherent spread spectrum modulation and demodulation data transmission with variable data rate bit by bit, configurable spread spectrum code rate, strong anti-Doppler performance and fast synchronization speed under the condition of low signal-to-noise ratio. Frequency sweep, parallel partial coherence and incoherent accumulation are used to realize the fast acquisition of incoherent spread spectrum signals with large frequency offset range, and digital average filter and square filter are used to achieve symbol timing synchronization of incoherent spread spectrum signals. The invention has high integration degree, strong portability, light weight and low power consumption, small commissioning workload of the whole machine, simple and flexible interface, easiness in expanding, and stable and reliable performance, the circuit is integrated in a 292mm long,185mm wide and 28mm high square terminal, weighing 0.6 kg, which is especially suitable for the application of non-coherent spread spectrum modulation and demodulation channel transmission terminal inairborne satellite communication system with limited volume and weight.

The invention relates to a large-thickness high-performance SA302GrC steel plate and a production method thereof, belonging to the technical field of steel smelting processes. According to the technical scheme, the production method comprises procedures of smelting, casting, heating, rolling, cooling after rolling, normalizing, accelerated cooling and tempering; and the steel plate is prepared from the following chemical ingredients in percentage by mass: 0.10-0.18% of C, 0.15-0.40% of Si, 1.20-1.45% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, 0.40-0.55% of Ni, 0.45-0.60% of Mo, and the balance of Fe and inevitable impurities. The steel plate has the following advantages that the obdurability matching is good, the yield strength Re is greater than or equal to 345Mpa, the transverse Charpy impact in the position which is 1/4 of the plate thickness at minus 10 DEG C is less than 41J, the steel quality is purer, the lamellar tearing resisting property is good, the through thickness direction Z is greater than or equal to 35%, the welding property is good, and the thickness of the steel plate is 135mm. The steel plate which is produced by using the production method provided by the invention has the characteristics of high purity, uniformity in component and internal compactness, and has good obdurability matching.

The invention discloses a vacuum filter, and belongs to the field of filtration, which is used for solving the problems of cooling and dedusting of high-temperature and dust-contained gas in a vacuum working system. The vacuum filter comprises a cavity body, a diffuser and a filter element, wherein the cavity body is provided with a gas inlet connected with a specific gas pipeline and a gas outlet connected with a vacuum pump; the top end of the cavity body is provided with a top cover connected with the cavity body in a sealed mode; the cavity body is internally provided with the diffuser at the gas inlet; the filter element is installed at the center in the cavity body; the side wall of the filter element is provided with filter holes; the bottom surface of the filter element is provided with an opening leading to the gas outlet of the cavity body, thereby preventing the vacuum pump and an upstream-downstream system from being damaged by high-temperature, corrosive and dangerous dust particles, and solving the problem of too complex and frequent maintaining frequency of the vacuum pump of the vacuum filtration system. From the aspect of environment protection, gas in pipelines can be further cooled down and purified, and air pollution can be reduced.

The invention provides an in-situ heat conductivity coefficient testing device and method for a gas hydrate. The inner wall of a reaction kettle is lined with fluorine plastic material; before production of a gas hydrate, gas is highly dissolved; the super-cooling degree is adopted in the production process; the gas hydrate is generated under a gas-liquid interface in the reaction kettle; the obtained hydrate sample is flat in surface, compact in the interior and high in gas content; the hydrate sample is in full contact with a heat conduction probe arranged at the bottom of the reaction kettle, and high-pressure compaction is not needed; a heat conduction testing device comprises a set of thermophysical property analysis tester based on a transient plane thermal source method; the heat conduction probe is adhered to the surface of a background material layer; the background material layer is arranged flat at the bottom of the reaction kettle; the background material layer is adhered to a cylinder cured by a high-strength structural adhesive; the heat conduction probe is adhered to the background material layer by the same high-strength structural adhesive. The hydrate synthesized by the device and the method is high in quality; the heat conductivity coefficient test is simple in operation, convenient in data acquisition and accurate and reliable in test value.

The invention relates to a food and a preparation method thereof, and in particular relates to a rice dumpling capable of reducing rice on reed leaf and a preparation method of the rice dumpling. The method comprises the following steps: previously preparing raw materials: water, sticky rice, sodium carbonate, sesame oil, corn powder, sodium diacetate and calcium bicarbonate, cooking reed leaves, making rice dumpling, and soaking the rice dumpling. The invention aims at effectively reducing the rice on the reed leaf.

The invention discloses a hydrogen sulfide corrosion resistant hardened and tempered high-strength steel plate for an offshore drilling platform. The steel plate consists of the following chemical components in percentage by weight: 0.13%-0.15% of C, 0.15%-0.35% of Si, 1.10%-1.30% of Mn, 1.20%-1.25% of Ni, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 0.020%-0.050% of Al, 0.020%-0.030% of Nb, 0.030%-0.040% of V, 0.015%-0.02% of Ti, 1.00%-1.10% of Cr, 0.40%-0.50% of Mo, 0.0005%-0.0015% of B, less than or equal to 0.25% of Cu, and the balance Fe and inevitable impurities. A production method comprises the processes of heating, rolling and thermal treatment. The steel plate produced by the production method has the characteristics of being uniform in component and internally compact, has a good structure, good comprehensive properties, good hydrogen sulfide corrosion resistance and good welding performance, and the performances of the steel plate completely meet operating requirements of the hydrogen sulfide corrosion resistant hardened and tempered high-strength steel plate for the offshore drilling platform.

The invention relates to the technical field of panel manufacturing, in particular to a preparing method of an environment-friendly antibacterial and mildew-proof composite fiber panel. The method includes the steps of preparing basic fiber, preparing enhancing fiber, preparing a binder, preparing a flame-retardant enhancer, preparing a curing agent, mixing the materials and preparing the panel. By means of the method, wastes are recycled, and the prepared panel is environmentally friendly, high in mechanical strength, excellent in mildew-proof and flame-retardant performance, free of harmfulgas releasing, controllable in production process, free of toxin and harm and suitable for batch production and has high practical value and good application prospects.

The invention provides a microwave auxiliary heat treatment method for ceramic fiber, and a heat insulator structure thereof, and relates to a ceramic fiber. The invention provides the microwave auxiliary heat treatment method for ceramic fiber, and the heat insulator structure thereof. The prepared fiber has a single-phase structure, has the length-diameter ratio more than 200, is compact in inside, and can be used for 1-3 type piezoelectric composite materials. The ceramic fiber is obtained by putting gel fiber into a crucible, putting the crucible with the gel fiber into a heat insulator, presintering the whole heat insulator in a microwave oven and then subjecting the presentered fiber to heat treatment in a muffle furnace. The heat insulator structure thereof is provided with an outer-layer heat insulator, a secondary-outer-layer Al2O3 heat insulator and an inner-layer crucible, and a microwave auxiliary absorbing medium is arranged between the secondary-outer-layer Al2O3 heat insulator and the inner-layer crucible.

The invention discloses a hot work die steel H13 and a continuous casting and rolling manufacturing process thereof. The continuous casting and rolling manufacturing process comprises the steps of molten steel smelting, LF refining, VD vacuum treatment, continuous casting and steel rolling, wherein the molten iron is produced through blast furnace smelting, so that the molten iron with a low content of harmful elements can be obtained, after the obtained molten steel is subjected to refining and VD vacuum treatment, molten steel containing a low content of harmful elements such as P, S, Cu, Ni, As, Sb and Sn is obtained, a continuous casting round billet with good internal quality is obtained by adopting three-stage electromagnetic stirring and setting the reasonable degree of superheat, casting speed and cooling process, a steel rod obtained through rolling is heated through four temperature sections, and then the steel rod with the compact interior and the good surface quality is obtained. Besides, the flaw detection qualification rate is greatly increased.

The invention relates to the technical field of board manufacturing, in particular to a preparing method of mould-proof environment-friendly artificial boards. The preparing method comprises the stepsof preparing basic fibers, preparing reinforced fibers, preparing adhesives, preparing a flame-retardant enhancer, preparing a curing agent, mixing the materials and preparing the boards. By means ofthe preparing method of the boards, waste is recycled and environment friendliness is achieved; and the prepared boards have good mechanical strength, excellent mould-proof and flame-retardant properties, free of emission of harmful gas, controllable in the production process, nontoxic and harmless, area suitable for batch production and have high practical value and good application prospects.

The invention provides a flexible packing former for a concrete face rockfill dam face. The flexible packing former is characterized by comprising a machine body, wherein the machine body comprises forming belts for clamping and pressing flexible packing, fixing parts for fixing the two ends of each forming belt and connecting parts for connecting the fixing parts; slot surfaces for clamping and pressing the flexible packing are formed in the forming belts; the slot surfaces are matched with the outer profile of the cross section of the flexible packing to be embedded and filled or matched with the decomposed cross section of the flexible packing to be embedded and filled in shape; the number of the forming belts is no less than 2; the forming belts are made from materials which are easy to deform and good in tensile strength; such materials which are easy to deform and good in tensile strength are nonmetal materials, such as rubber, leather, plastic and the like, or metal materials, such as copper, aluminum, iron and the like; the connecting parts can be used for adjusting the spacing among the fixing parts; and the fixing parts are provided with fixtures capable of clamping the forming belts. According to the flexible packing former, the problems of low efficiency and low quality in embedding and filling joint materials in jointing and caulking construction of the concrete face rockfill dam face can be effectively solved.

The invention discloses a filter system of a fish pond. The filter system comprises a box body shell, a driving gear and a filter screen; the upper part of the left side of the box body shell is connected with a water inlet; an external-turning handle is arranged above the water inlet; a conversion joint is arranged on the right side of the box body shell; the right end of the conversion joint isprovided with a water outlet; a power cabin is arranged at the lower part of the inner part of the box body shell; a filter cabin is arranged above the power cabin; a transmission gear is fixed at theleft end of the inner part of the power cabin; a sealing bearing is arranged above the transmission gear; the right side of the driving gear is connected with a motor; the driving gear is positionedat the right side of the transmission gear; a connecting screw is arranged below the motor; an air compressor is arranged at the right side of the motor; a high-pressure copper pipe is connected to the right side of the air compressor; the lower end of the air compressor is fixed to an internal base; a waterproof screw is arranged in the inner part of the upper end of the sealing bearing; a waterproof cap is arranged on the waterproof screw; and rotating shafts are connected on the sealing bearing. Impurity precipitate is not formed in the filter system, and the blockage of the filter device is avoided.

The invention relates to the field of waterproof coiled materials, and particularly discloses a self-adhesive glue for a high-molecular waterproof coiled material, a preparation method thereof, and the high-molecular waterproof coiled material. The self-adhesive glue is prepared from 10-20 parts of an acrylate emulsion, 20-30 parts of alkyd resin, 10-20 parts of hydroxystyrene, 2-4 parts of a thickening agent, 2-4 parts of a defoaming agent, 3-5 parts of a dispersing agent and 30-50 parts of water. The preparation method comprises the following steps: uniformly mixing the water, the dispersing agent and the defoaming agent, then adding the acrylate emulsion and the hydroxystyrene, uniformly mixing, then adding the acrylate emulsion and the thickening agent, and uniformly stirring to obtain the self-adhesive glue. The self-adhesive glue can be used for the bonding part of the waterproof roll and concrete, and has the advantages of high bonding strength and wet paving capability; in addition, according to the preparation method disclosed by the invention, the alkyd resin is fully reacted with the acrylate emulsion and the hydroxystyrene, so that the bonding strength of the self-adhesive glue is improved; and the waterproof coiled material prepared by the invention can adopt a construction mode of dry paving or wet paving and the like, and a concrete protection layer does not need to be arranged on the waterproof coiled material, so that green construction is realized, and energy conservation and environmental protection are realized.

The invention relates to the technical field of board manufacturing, in particular to a preparation process of pressure resisting composite boards. The process comprises the steps of preparation of basic fibers, preparation of enhanced fibers, preparation of binders, preparation of inflaming retarding reinforcing agents, preparation of curing agents, material mixing and board preparation. According to the board preparation method, waste is recycled, the process is environmentally friendly, the prepared boards are good in mechanical strength and have excellent mould proof and inflaming retarding properties, no harmful gas is released, the production process is controllable, and the boards are free of poison and harm, are suitable for volume production and have great practical value and goodapplication prospects.