15results about How to "Increase the aperture" patented technology

The present application relates to complex stratum pile foundation construction technology field, disclose a kind of riprapping stratum full casing rotary and rotary drilling combined hole construction method, comprising the following steps: leveling construction ground;Pile position lofting is carried out, and guiding positioning structure is set;First section casing with grouting passage is installed on full casing rotary drilling machine, grouting passage is used for grouting;Through full casing rotary drilling machine clamping casing, drive casing press into riprapping stratum, while rotary drilling carries out soil taking;Slurry is injected by grouting passage, and riprapping body outside casing is consolidated to form annular consolidated body;The elevation difference between the soil taking surface of rotary drilling and the bottom end of casing is controlled to be within the preset range, and the following protection wall is formed;Lengthen next section casing, and connect adjacent grouting passage;Until casing penetrates riprapping layer and main sand layer and enters lower stable layer.The present application can solve the problems of difficult riprapping stratum hole forming, easy hole collapse, easy grouting leakage and easy drill sticking.

This invention discloses a carbon-coated iron porous aerogel, its preparation method, and its application in lithium metal anodes, belonging to the field of lithium metal anode material preparation. The carbon-coated iron porous aerogel of this invention constructs a continuously conductive and highly stable carbon-based porous three-dimensional framework through the synergistic effect of two-dimensional graphene oxide, one-dimensional carbon nanotubes, and carbon-coated iron units. The NaCl hard template effectively amplifies the macropore size and increases the number of pores, providing interconnected channels for the rapid wetting and spontaneous climbing of molten lithium. The carbon-coated iron interface serves as a stable lithiophilic site, inducing uniform nucleation of lithium metal and restricting disordered growth, thereby achieving stable confinement of lithium metal in the composite electrode.

The application discloses a high-strength, large-pore-volume phosphorus-containing binder, characterized in that the binder comprises a glue, a curing agent and a modifier; the glue comprises a phosphorus-containing compound and an aluminum-containing compound; the curing agent comprises a gamma-aluminum oxide precursor, an acid and an alkylammonium salt, and the modifier is a metal chelate; wherein the colloidal solubility index of the gamma-aluminum oxide precursor is less than or equal to 50%; and the modifier is reacted with the glue in a high-shear dispersion emulsifier. The phosphorus-containing binder provided by the application, in combination with a conventional method, can obtain a catalytic cracking catalyst which, on the basis of high molecular sieve content and large pore volume, still has high wear resistance.

The invention discloses a front end framework left and right mounting support stamping system which comprises a progressive die, the progressive die comprises an upper die and a lower die, the upper die is located at the top of the lower die, a floating material guide block is arranged at one end of the upper die, and a material belt guide ruler used in cooperation with the floating material guide block is arranged at the corresponding position of the lower die. The other end of the lower die is provided with a product sliding groove and a waste sliding groove. By integrating floating material guiding and multi-station continuous stamping, automatic feeding, accurate positioning, multi-procedure synchronous machining and automatic separation of finished waste are integrated, a floating material guiding block of the upper die and a material belt guiding ruler of the lower die are matched at the feeding end to achieve lifting and transverse guiding of a material belt, and the automatic feeding, accurate positioning, multi-procedure synchronous machining and automatic separation of the finished waste are achieved. In the punching process, a guide hole used for accurate positioning in the whole process is punched at first, then a guide pin is used for hole pin inserting and positioning before feeding in each subsequent step, and therefore the accumulated feeding error is effectively restrained.

The application discloses a kind of sparse array amplitude-phase error correction-based meshless parameter estimation method, and its implementation steps are: receiving end is laid out sparse array;The received signal of sparse array with array element gain phase error is modeled;Sample covariance matrix is constructed;The output signal of virtual differential common array is calculated by vectorization;Define the atom norm of introducing amplitude-phase error parameter, and construct the optimization model for target direction estimation;By dual atom norm, the original optimization problem is converted into its dual problem;The semi-positive definite programming form of dual problem is deduced;Dual polynomial is constructed, and the wave direction estimation result is obtained by spectral peak search.In addition, the application fully utilizes the virtual differential common array of sparse array to provide extended degrees of freedom and all information, and suppresses the influence of array element amplitude-phase error by defining new atom norm, solves the mesh mismatch problem caused by parameter domain discretization, and obtains high-precision meshless direction estimation result.

The invention discloses a silicon oxide microsphere as well as a preparation method and application thereof. The silicon oxide microspheres are large-aperture silicon oxide microspheres, the specific surface area is 395-750m < 2 > / g, the pore volume is 1.0-3.5 ml / g, and the average aperture is 17-50nm. The silicon oxide microspheres have the characteristics of large specific surface area, large pore volume and large pore diameter, and the catalyst prepared by using the silicon oxide microspheres as the carrier has the advantage that the activity is remarkably improved when the catalyst is applied to olefin polymerization reaction.

The application belongs to the technical field of lithium batteries, and relates to a preparation method of a double-coated silicon-carbon composite material, an electrode and a lithium battery.The method comprises the following steps: placing a lithium dopant and a MOF material in a first organic solvent, adding a template agent and a catalyst, reacting, filtering, freeze-drying and obtaining a gel composite; in an inert atmosphere, the gel composite is heated to a first preset temperature, carbon dioxide is introduced at a preset flow rate, the temperature is lowered, the gel composite is soaked in mixed acid, pickling is performed, vacuum drying is performed, and a porous carbon composite material is obtained; liquid silane, a phosphine derivative, a dispersing agent, the porous carbon composite material and a silane coupling agent are added to a second organic solvent, spray drying is performed, primary carbonization is performed, and a silicon-carbon precursor material is obtained; resin is dissolved in a third organic solvent, a fast ion conductor and the silicon-carbon precursor material are added, secondary carbonization is performed, the temperature is lowered to a second preset temperature, a reducing gas is introduced, and a double-coated silicon-carbon composite material is obtained; the conductivity is improved, the interface stability is improved, and the full charge swelling is reduced.

The application belongs to the field of environmental protection technology of biological repair of wastewater, and discloses a kind of immobilized adsorption microspheres, which comprise sea kobe bacteria, Candida guilliermondii and European nitrosomonas bacteria, and are prepared by immobilized embedding technology. The microspheres of the application can effectively repair glutamic acid high ammonia nitrogen fermentation wastewater.

This invention discloses a cubic bifunctional adsorbent material, its preparation method, and its applications. The preparation method includes the following steps: calcining a zeolite imidazole framework at a temperature above 800°C under an inert atmosphere to obtain the cubic bifunctional adsorbent material. The cubic bifunctional adsorbent material of this invention can simultaneously adsorb sulfonamide antibiotics and heavy metals. It also possesses a large specific surface area, numerous adsorption sites, abundant pore structure, large pore volume and diameter, and high adsorption capacity. It is a novel bifunctional adsorbent with excellent performance. When used to treat complex wastewater containing sulfonamide antibiotics and heavy metals, it can effectively remove these substances from the wastewater, demonstrating high practical value and promising application prospects. The preparation method of this invention also has advantages such as simple process, convenient operation, low cost, economic safety, and ease of promotion. It plays a significant role in promoting the large-scale preparation and industrial application of cubic bifunctional adsorbent materials.

This invention relates to the field of hydrocracking catalysts, and discloses a hydrocracking catalyst, its preparation method and application, and a method for hydrocracking treatment of residue oil. The hydrocracking catalyst contains molecular sieves, silicon-modified alumina, and active metal components. Optionally, the hydrocracking catalyst also contains alumina and / or additives. The content of the molecular sieve is 5-25 wt%, the content of the silicon-modified alumina is 30-60 wt%, and the content of the alumina is 0-20 wt%. The content of the active metal components, calculated as oxides, is 5-35 wt%, and the content of the additives, calculated as oxides, is 0-1.0 wt%. The catalyst provided by this invention has the advantages of large specific surface area, large pore volume, large pore size, and high metal content. When used in the hydrocracking treatment of residue oil, it not only exhibits high activity and good stability, but also improves naphtha selectivity, expands feedstock adaptability, and reduces hydrogen consumption.

This invention discloses a Ni-based catalyst, its preparation method, and its application in the oligomerization reaction of ethylene, belonging to the field of catalyst synthesis technology. This invention uses ammonium niobate oxalate hydrate as the niobium source and adds an ammonium solution to the reaction system. Under ultrapure water as the solvent, a niobium oxide support with a nanorod morphology is synthesized. A metal nitrate is used as a supporting metal precursor, and the precursor is loaded onto the nanorod niobium oxide support using a wet impregnation method to obtain a catalyst precursor. The catalyst precursor is then heat-treated to obtain a nanorod niobium oxide-supported nickel-based catalyst. The nanorod niobium oxide-supported nickel-based catalyst prepared by this invention exhibits high 1-butene selectivity and ethylene conversion in the ethylene oligomerization reaction.

This invention relates to an ultra-high cell density organ module based on click chemistry photocurable hydrogel, its construction method, and its applications. The construction method includes: providing norbornene-modified high molecular weight hyaluronic acid with a high grafting rate and thiol-modified high molecular weight hyaluronic acid; mixing a photoinitiator, cells, HANb solution, and HASH solution; and rapidly cross-linking and curing the module through a click chemistry reaction after extremely short-term light exposure to form the organ module. This invention utilizes the synergistic effect of the high molecular weight hyaluronic acid host material and the high grafting rate modification to achieve the construction of an ultra-high cell density organ module under ultra-low photoinitiator concentration and extremely short light exposure conditions. The liver module constructed based on this method possesses extremely high cell density, good mechanical properties, and excellent liver function.

This invention relates to a C x N y This invention relates to a Pt@C fuel cell catalyst and its preparation method, belonging to the field of fuel cell catalyst technology. First, Pt@C is synthesized via a solvothermal reaction using ethylene glycol reduction. Then, it is mixed with a nitrogen-containing polymer material and cobalt chloride hexahydrate, and subjected to reduction in a reducing atmosphere, high-temperature treatment, carbon pyrolysis, and alloying to obtain porous nitrogen-containing carbon-coated Pt@C. x N y @PtCo / C catalyst. In the prepared catalyst, the porous coating layer significantly reduces the poisoning of catalyst particles by resin during fuel cell operation, improves cell activity, and extends cell life, exhibiting excellent activity and durability.

The application discloses a magnesium-aluminum alloy workpiece and a surface nano processing method thereof, and relates to the technical field of metal material processing technology.The roughening liquid adopts sulfuric acid to realize surface etching, forms uniform corrosion pits, and is matched with hydroxyethylidene diphosphonic acid corrosion inhibitor to effectively inhibit the pitting corrosion and intergranular corrosion of the magnesium-aluminum alloy and avoid excessive roughening to cause the strength of the base material to decrease.During ash removal, an alkaline medicine liquid is added with a surfactant, isostearyl alcohol polyoxyethylene ether is used as a non-ionic surfactant, residual ash in the corrosion pits is stripped, an activated metal surface is exposed, and the uniformity of subsequent electrolytic treatment is ensured.The application generates a stable and firm composite oxide film on the surface of the magnesium-aluminum alloy workpiece through electrolytic treatment, uniform nano holes are formed on the oxide film, and the bonding performance of the magnesium-aluminum alloy workpiece subjected to nano injection molding is improved.

This invention provides a drilling and positioning mechanism for an impeller box, belonging to the field of mechanical technology. It solves the problem of ensuring drilling accuracy for impeller boxes. The drilling and positioning mechanism includes a frame with a columnar positioning seat for mounting the impeller box. The frame also has a U-shaped, liftable pressure plate located directly above the positioning seat and having a clearance notch opposite the positioning seat. A positioning post is vertically slidably connected to the pressure plate, with its lower end opposite the clearance notch and its lower surface higher than the lower surface of the pressure plate. A spring is also provided on the pressure plate, elastically acting downwards on the upper end of the positioning post. This drilling and positioning mechanism ensures drilling accuracy for the impeller box.