34results about How to "Destruction strength" patented technology

The invention discloses a hydrogenation catalyst for use in treatment of inferior fuel oil. The hydrogenation catalyst is prepared from a metal active component and a carrier loading the metal activecomponent, wherein the carrier is mainly prepared from modified graphene and aluminum oxide by mixing, extrusion molding, drying and calcining; the metal active component is prepared from metal oxides; the metal oxides comprise oxides of family VIB and/or family VIII metal elements; the catalyst is 30 to 80 nm in average pore size, is 100 to 300 m<2>/g in specific surface area, and is 300 N.cm<-1>or more in crushing strength. The invention further provides a preparation method and application for the catalyst. Compared with the conventional hydrogenation catalyst, the catalyst provided by theinvention has the advantages of high strength, concentrated pore distribution, large pore volume, large specific surface area, high activity and high stability, and is suitable for use in the treatment of inferior fuel oil with high asphaltene content.

The invention relates to a preparation method of cotton pulp for high-strength paper. In the preparation method, a material sorting process, a cotton opening process, an impurity removal process, an alkali preparation process, a dipping process, a steaming and bleaching process, a pre-desanding process, a pre-pulping process, a concentration process, a post-desanding process, a post-pulping process and a pulp copying process are performed on cotton linter to obtain the cotton pulp. The alkali preparation and dipping processes comprise the following steps of: controlling the alkali preparationtemperature to be between 30 and 40 DEG C; adding 2 to 3.5 percent of NaOH, 0.1 to 0.2 percent of anthraquinone, 2.5 to 3.5 percent of boiling agent and 2 to 3 percent of peracetic acid according to oven dry stock amount to obtain alkali liquor, wherein the alkali liquor proportion is 1:(4.5-5.5); and performing penetration mixing on the alkali liquor and the cotton linter from which impurities are removed. By the method, pulp fibers have high folding strength, high breaking length and high whiteness, pollution to the environment is reduced, and fluorescent substances are removed in the firstheat preservation process.

The invention relates to a defibrating process for tobacco sheets. It includes the following steps: (1) sorting, removing impurities, and pulverizing the tobacco stems or tobacco leaf fragments for pretreatment; (2) soaking and extracting the raw materials after the above treatment; (3) performing solid-liquid separation on the extract, and The insoluble matter in the aqueous solution is separated, and the obtained fiber is soaked and washed with lye and then treated with acid solution to neutrality; (4) the obtained fiber slurry is mixed with dry fiber, and the amount of dry fiber added is the total amount of fiber slurry (5) distilling and concentrating the extract obtained in step (2), dipping or spraying the obtained tobacco concentrate on the sheet base, and finally drying it to become a tobacco sheet. The tobacco sheet prepared by defibrating in the present invention has good mechanical strength, less alkali residue, and better smoking taste than products obtained by simple mechanical defibrating and chemical defibrating.

The invention discloses a hydrocracking catalyst. The hydrocracking catalyst comprises a metal active ingredient, a carrier loaded with the metal active ingredients and a molecular sieve used as a cracking component, wherein the carrier is mainly formed by mixing modified graphene and aluminium hydroxide dry glue powder; the metal active ingredient comprises metal oxides which comprise oxides of VIB-family and/or VIII-family metal elements; and the specific surface area of the catalyst is 250-550 m<2>/g, and the pore volume is 0.20-0.60 ml/g. The invention further provides a preparation methodfor the catalyst and application thereof. The preparation method for the catalyst provided by the invention is simple, is low in cost, and has the advantages of good activity, great pore volume, great specific surface area and high strength, is suitable for treating worse raw oil with a high dry point (higher than 560 DEG C), has good activity stability, can further convert polycyclic aromatic hydrocarbon primarily saturated in hydrofining into hydrocarbons with smaller molecules, so that the hydrogenation tail oil yield is obviously reduced, and the light fuel oil yield is remarkably increased.

The invention provides an integrated die-cast alloy bicycle frame. The integrated die-cast alloy bicycle frame comprises a first bicycle frame pressing piece, a second bicycle frame pressing piece, a first rear beam pressing piece and a second rear beam pressing piece. The first bicycle frame pressing piece and the second bicycle frame pressing piece each comprise a front axle pressing part, a front beam pressing part, a saddle pressing part, a lower beam pressing part and a rear beam pressing part. The front axle pressing part, the front beam pressing part, the saddle pressing part and the lower beam pressing part of the first bicycle frame pressing piece and the front axle pressing part, the front beam pressing part, the saddle pressing part and the lower beam pressing part of the second bicycle frame pressing piece are press-formed correspondingly. According to the integrated die-cast alloy bicycle frame, the defects, caused by a traditional welding technique, that the strength is reduced and the attractiveness is affected by weld lines are avoided while the weight of the bicycle frame can be reduced. The invention further provides a pressing method of the integrated die-cast alloy bicycle frame. The pressing method of the integrated die-cast alloy bicycle frame comprises the steps of 3D designing, die opening, smelting, die manufacturing, gluing, pressing and the like. By the adoption of the method, the bicycle frame production process is simplified, and the bicycle frame production efficiency is improved.

The invention discloses a high-strength wear-resistant complex brass for an automotive synchronizing ring, which comprises the following components in percentage by weight: 54-56% of Cu, 3.0-4.5% of Al, 0.5-1.0% of Fe, 6.0-7.5% of Ni, 2.0-2.5% of Si, and the balance of Zn and less than 0.05% of impurities. The complex brass also has good plasticity and toughness under the conditions of high strength, high hardness and high wear resistance.

The invention discloses an electric lifting table with a wireless power supply system and a lifting table system. The electric lifting table with the wireless power supply system comprises a table board, a wireless charging transmitting module is connected to the lower portion of the table board, the wireless charging transmitting module forms a charging area on the upper surface of the table board, and the charging area is used for wireless power supply or wireless charging of an external accessory provided with a wireless charging receiving module. The electric lifting table of the wirelesspower supply system and the lifting table system are simple in structure, the table top is clean and tidy, external accessories are convenient to charge, and safety is high.

The invention discloses a cauliflower vegetable root cleaning device for clean vegetable processing, and relates to the technical field of vegetable processing. The cauliflower vegetable root cleaningdevice for clean vegetable processing comprises a machine body, the left side of the machine body is in inserted connection with a feeding frame, the feeding frame is communicated with an inner cavity of the machine body, the machine body is internally, transversely and movably provided with a conveyor belt, the conveyor belt is located under the right side of the feeding frame, the right end ofthe conveyor belt is driven by a driving motor, the driving motor is fixedly arranged at the right side of the bottom in the machine body, and a cleaning box is arranged under the right side of the conveyor belt. The cauliflower vegetable root cleaning device for clean vegetable processing fixes cauliflowers located on the conveyor belt through barbs, cuts vegetable roots through a blade, and thecauliflowers after roots are removed and fall into the cleaning box for cleaning along with the transmission of the conveyor belt, thereby effectively ensuring effective cleaning in the cauliflowers and solving the problem that an existing cauliflower cleaning device cannot fully clean the inner portions of the cauliflowers.

The invention discloses an automatic window capable of purifying air. The automatic window comprises a window frame, a sash and a connecting assembly, a first guiding plate is disposed on the inner side surface of a first vertical window edge, and the connecting assemblycomprises a first hinge block disposed in the first guiding plate and moving back and forth, a first hinge unit disposed betweenthe same side edges of the first guiding plate and the sash, a second hinge unit arranged on the inner side edge of a second vertical window edgeand the same side edge of the sash; the window frame isfurther provided with a driving mechanism for driving the first hinge block to move back and forth within the first guiding plate; and at least one filter assembly is disposed on a window body, and the filter assembly is an electrostatic dust filter assembly or a nano filter assembly. The window can realize automatic opening and closing of a hinged window, and filtration is realized.

The invention discloses a preparation method of composite foam concrete. The method is characterized in that: main raw materials comprise, by weight, 20-85 parts of Portland cement, 5-85 parts of ultrafine aggregate, 10-20 parts of fly ash and 20-60 parts of water; the above-mentioned four concrete raw materials are stirred to form common ultrafine aggregate concrete slurry; and by taking the volume of a finished product of the common concrete slurry as 1 part, the following materials comprising 0.8-4 parts of foam, 0.5-3 parts of polyphenylene particles with the diameter of 2-4 mm and 0.5-3 parts of polyphenylene particles with the diameter of 6-8 mm are added in parts by volume for composition. The ultrafine aggregate is obtained by industrial grinding of natural stone, or waste buildingconcrete or waste glass materials, and the particle size of the ultrafine aggregate is not larger than 0.1 mm. The method has the advantages of being simple, efficient, relatively high in strength, easy to machine and the like.

The invention provides bentonite cat litter capable of being flushed in a toilet. The bentonite cat litter is prepared from the raw materials in parts by weight: 65-68 parts of bentonite, 31-35 parts of zeolite and 1-2 parts of sodium carbonate. The zeolite is of a frame-shaped structure; a plurality of cavities are formed in the middle of the zeolite; and a certain amount of air exists in the cavities. When the cat litter is soaked in water, under the action of water pressure, the water can quickly enter into pores so as to discharge the air, and the discharged air can easily destroy the strength of cat litter clots, so that the cat litter clots are dispersed and dissolved, and the purpose of being flushed in the toilet is achieved. A preparation method includes the steps of selecting the bentonite, drying the selected bentonite, adding the sodium carbonate and the zeolite into the dried bentonite, performing uniformly mixing to obtain a mixture, grinding the mixture, adding water into the ground mixture, performing preparing into balls, obtaining wet balls, and drying the wet balls to obtain a finished product. The disclosed preparation method is simple in production process, short in technological process, easily available in raw materials and low in cost.

The invention discloses a flat tube and fin clamping and pressing device, a manufacturing method and a micro-channel heat exchanger. The device comprises a first machine frame (11), a transfer platform assembly (12), a press machine assembly (13), a transfer module (14) and a second machine frame (15); the press machine assembly (13) is assembled on the first machine frame (11), and the transfer platform assembly (12) is used to control the transfer module (14) to move back and forth on the first machine frame (11) and the second machine frame (15); and the transfer platform assembly (12) is assembled on the transfer module (14) for pressing flat tubes and fins of various specifications together. According to the device, the flat tubes and the fins are fixed through pressing, so that the flat tubes and the fins are firmly connected, sufficient clamping pressure can be output, and overpressure is prevented from damaging strength of the fins.

The invention discloses a hydrofining catalyst. The hydrofining catalyst comprises a metal active component, a carrier loaded with the metal active component and auxiliaries, wherein the carrier is mainly formed by mixing, extrusion-moulding, drying and roasting modified graphene and aluminium oxide; the metal active ingredient comprises metal oxides which comprise oxides of VIB-family and/or VIII-family metal elements; the auxiliaries comprise oxides of magnesium and/or barium; the average pore size of the catalyst is 30-80 nm, the specific surface area is 100-300 m<2>/g, and crushing strength is 300 N.cm<-1> or more. The invention further provides a preparation method for the catalyst and application thereof. Compared with a conventional hydrofining catalyst, the catalyst provided by theinvention has the advantages of high strength, intensive pore distribution, great pore volume and great specific surface area, is good in activity and stability, and is suitable for treating bad oilwith high asphalt content.

The invention discloses a cooling water circulating device for a PE wood-plastic composite mold. The cooling water circulating device for the PE wood-plastic composite mold comprises a support plate and a core rod body, wherein one end of the core rod body is connected to the support plate, and the other end of the core rod body comprises four core rods; four sets of first cooling pipe holes are formed in the upper side of the support plate; four sets of second cooling pipe holes are formed in the lower side of the support plate; a third cooling pipe hole and a fourth cooling pipe hole are formed in the end surface of one end of each core rod; cooling pipe threads are arranged at one end of each third cooling pipe hole and one end of each fourth cooling pipe hole respectively, wherein a cooling water tank is arranged at the other ends of the cooling pipe threads, and the two cooling pipe threads are assembled together in the cooling water tank; a first cooling pipe inclined hole is formed in the upper side of one end of each core rod; and a second cooling pipe inclined hole is formed in the lower side of one end of each core rod. According to the cooling water circulating device for the PE wood-plastic composite mold, the failure rate of the mold is decreased, the maintenance cost of the mold is reduced, and use is convenient and reliable.

The invention provides a planting method of evodia lepta. Seed propagation is adopted, and the evodia lepta is planted specifically through a seedling transplantation method. Seeds are treated firstly, the surfaces of the seeds are damaged, the germination rate is increased, seedling transplantation is conducted after seedling culture, and the survival rate is guaranteed. Field management comprises twisting treatment and pruning work, the effect of dwarfing plants is achieved, growth of branches and leaves is promoted, the yield of evodia lepta leaves is increased, and the quality of the evodia lepta leaves is improved.

The invention relates to a method for treating water seepage of a pavement structure in a plain area. The method includes: encircling an area, needing to be drilled, through a honeycomb-structure splash-proof unit; by the aid of a pile driver, subjecting the area needing to be drilled and gravel piles to hole drilling; filling drilled holes with mixed fillings by layers, and ramming the mixed fillings in every layer: coating circumferential walls of the drilled holes with asphalt layers after the mixed fillings in bottom layers of the drilled holes are rammed, continuously filling middle layers and upper layers of the drilled holes with the mixed fillings which are rammed in sequence; removing residual materials in the drilled hole area, filling seams and sealing the drilled holes with mortar or clay; paving a slurry seal layer. The method for treating the water seepage of the pavement structure has the advantages that a splash-proof function is achieved, compressive property and non-deformability of the mixed fillings in the drilled holes are improved, and water seepage treatment effect is improved.