171results about How to "Improve ductility" patented technology

The invention discloses a construction method for excavating an upside-down well wall of a deep foundation pit under an eccentric compression working condition. The construction method is suitable for an asymmetric load scene that the soil covering height of one side of a vertical shaft is obviously larger than that of the other side of the vertical shaft. The method comprises the steps that firstly, grouting is conducted on the periphery of the shaft wall of a vertical shaft under the current ground, and a soil body reinforcing area is formed; then, a mouth locking ring beam is constructed at a shaft mouth of the vertical shaft, an upper structure comprising a retaining wall, a reverse pressing plate, a retaining wall ring beam and a plate support is upwards constructed on the mouth locking ring beam, and soil covering side earthwork is synchronously backfilled to the level ground elevation in the construction process; next, an upside-down well wall method is adopted for subsection downward excavation, an annular arch frame, angle braces and anchor rod supports are constructed after each section is excavated, and an upper ring beam and a lower ring beam are arranged at the horsehead position and connected with the adjacent arch frames through vertical supports; and finally, concrete bottom sealing is conducted on the shaft completion face. The anti-overturning moment is formed through the reverse pressing plate and synchronous backfilling, and the problem of well wall instability caused by eccentric loads is effectively solved in combination with a multi-stage supporting system.

This invention provides a porous Zr-MOF material for synergistic sterilization and in-situ degradation of harmful substances, its preparation method, and applications. The material comprises a three-dimensional framework structure formed by the coordination of zirconium-based metal nodes and polycarboxylic acid organic ligands, exhibiting a pore system with both micropores and mesopores. The mass ratio of zirconium-based metal nodes to polycarboxylic acid organic ligands is 1:1. The polycarboxylic acid organic ligands include one of terephthalic acid, tetrafluoroterephthalic acid, and nitroterephthalic acid. Through its pore structure design and the catalytic effect of the metal nodes, this material achieves highly efficient killing of attached or contacted bacteria, while simultaneously degrading or passivating toxic metabolites released by bacteria (such as protein toxins) and residual organophosphorus pesticides in the environment.

A waterproof panel lamp high in cost performance comprises a disc provided with a light source cavity and a waterproof connector arranged on one side of the disc, a light-transmitting panel is installed at an opening of the light source cavity through an aluminum frame, the edge of the light-transmitting panel is wrapped with a U-shaped sealing strip, the aluminum frame is of a square frame structure on the whole, and a step face is arranged at the connecting position of the aluminum frame and the disc. An opening in the lower portion of the disc is provided with an outer edge attached to the step face and fixedly connected through a screw, the edge of the step face is provided with a sinking groove, the screw is in threaded connection with the sinking groove, the edge of the lower portion of the aluminum frame horizontally extends to form an inner edge, the U-shaped sealing strip is arranged on the inner edge, and the connecting position of the outer edge and the disc is bent downwards to form a pressing edge. The pressing edge is pressed on the upper part of the U-shaped sealing strip; according to the panel lamp structure, the U-shaped sealing strip wraps the edge of the light-transmitting panel, the light-transmitting panel is installed at the opening of the disc through the aluminum frame, the aluminum frame and the disc are fixed through the screws, the pressing edge is arranged at the edge of the disc and connected to the U-shaped sealing strip in a pressed mode, and the whole connecting structure is simple, low in manufacturing cost and good in waterproof effect.

This utility model discloses a filter paperboard punching mechanism, relating to the field of filter paperboard processing technology. It includes a hydraulic punching main unit, with a punching worktable on the front side of the main unit. A lower punching die is fixedly connected to the upper front end of the worktable. A hydraulic telescopic rod is fixedly connected to the upper end of the main unit via a cantilever, positioned directly above the lower punching die. Through the use of elastic heating support pads and elastic pressure pads, the loose fiber structure of the filter paperboard is effectively prevented from being compacted, ensuring the air permeability and filtration efficiency of the filter paperboard. Simultaneously, the elastic heating support pads heat the filter paperboard when in contact with it, softening the fibers and preventing brittle breakage, thus improving the quality of the punching process. Furthermore, the elastic pressure pads further reduce the direct impact of the punching blade on the paperboard, resulting in a smoother punching edge, reducing burrs and fiber damage, and improving the overall quality of the product.

This invention discloses an aluminum foil for a negative electrode current collector in sodium-ion batteries, which is prepared by pressing a pre-treated aluminum foil coating with an adhesive. The pre-treated aluminum foil comprises the following percentages of raw materials: Cu: 0.15-0.18%, Fe: 0.50-0.70%, Si: 0.20-0.30%, Mn: ≤0.01%, Mg: ≤0.01%, Ti: ≤0.03%, with the balance being Al and other unavoidable impurity elements. By limiting the types and contents of the components and performing intermediate annealing after rough rolling, internal stress defects generated during rolling are eliminated, effectively improving the uniformity of the alloy structure. After casting, intermediate annealing, and cold rolling, combined with subsequent rolling passes, the dislocation density of the aluminum foil can be increased, thereby solving the problems of easy breakage and difficult processing of lithium battery aluminum foil.

The application discloses a magnesium-based composite material and a preparation method and application thereof. The magnesium-based composite material comprises ferroferric oxide and a magnesium alloy. The magnesium alloy comprises the following components in percentage by weight: 3wt.%-6wt.% of Zn, 0.3wt.%-0.8wt.% of Ca, and the rest of Mg and inevitable impurities. The magnesium-based composite material can effectively solve the problem that micron-sized particles are easy to agglomerate in a metal liquid when the magnesium alloy is modified, and the plasticity of the alloy is reduced and the alloy is not easy to be formed.

The invention relates to injectable cross-linked collagen gel and a preparation method thereof. Two crosslinking strategies of self-crosslinking and crosslinking agent crosslinking are fused together for the first time, and two types of amido bonds, namely amido bonds of a collagen-collagen structure (A) and amido bonds of a collagen-fatty amine-collagen structure (B), are respectively constructed through two crosslinking paths, namely catalysis of collagen polypeptide self-crosslinking and catalysis of fatty amine crosslinking, so that a hard / soft dual crosslinking network is obtained. The relative proportion of the structure A and the structure B in the final product is adjusted through a proper cross-linking process, so that the strength and the stability of the final product are adjusted and controlled, and the use requirements of different injection parts can be met.

The present application belongs to the technical field of disposable plugging stopper, and specifically provides a combined pin plugging stopper and a slurry sealing and blocking method. The combined pin plugging stopper comprises a stopper pipe, a first pin, a sliding structure, a deformation piece, an inner support, a steel ball, a second pin, a connector, a slurry overflow port and a slurry outlet pipe. The stopper pipe is fixedly connected with a grouting pipe through the first pin. The other end of the stopper pipe is arranged along the central axis of the grouting pipe and is connected with the slurry outlet pipe. The steel ball is arranged inside the side of the stopper pipe close to the slurry outlet pipe. The second pin is arranged between the steel ball and the slurry outlet pipe. The sliding structure is sleeved on the stopper pipe and is provided with a plurality of deformation pieces. The end of the sliding structure close to the slurry outlet pipe is connected with the slurry overflow port arranged on the slurry outlet pipe through the connector. The inner support is arranged on the stopper pipe and between the adjacent two deformation pieces. The present application can solve the problem of sealing failure or difficult recovery in the high-pressure grouting process caused by the structural and technological defects of the existing plugging stopper.

This invention relates to the field of shock waveguide technology and discloses a spring electrode shock waveguide, comprising a slender carrier and a balloon. The space formed between the balloon and the carrier is an annular channel for fluid to enter and achieve inflation. First, the electrode in the guide tube is designed as a spring-type spiral structure and wound around the surface of the carrier, which can provide good electrical contact and make the electrode have excellent ductility, solving the problem of large stress on the electrode during the deformation of the balloon under fluid compression. Through the design of a first support mechanism and a second support mechanism, the first support mechanism is connected between two adjacent outer walls of the electrode, providing axial support force for the electrode, and the second support mechanism is connected between the inner wall of the balloon and the outer wall of the electrode, providing radial support force for the electrode. This reduces the pressure on the electrode when the internal pressure of the balloon increases and the balloon expands, further solving the stress problem of the electrode during the deformation of the balloon.

The invention discloses an assembly type shear wall bolt connection box with a stress gradient transition function, and belongs to the technical field of assembly type reinforced concrete structure connection. The connecting box comprises a steel box body, an anchoring back plate arranged on the back face of the box body and array type anchoring ribs arranged on the anchoring back plate. The metal outer wall of the connecting box is coated with a buffer layer formed by a high-strength rubber elastomer or epoxy resin mortar, and the thickness of the buffer layer is gradually reduced in the anchoring direction, so that rigidity gradient transition from the steel box to the concrete is achieved. The structure can effectively weaken stress concentration near the end of the anchor bar, delays cracking and crushing of concrete on the edge of the connecting box, remarkably improves ductility and crack resistance of the vertical abutted seam joint of the fabricated shear wall, and better achieves the design goals of strong connection and weak components.

The invention provides metal lithium surface protection slurry and a preparation method and application thereof, and the surface protection slurry comprises the following components by weight: 5-20 parts of a metal organic framework material (MOFs); 70 to 85 parts of a solvent; 3-6 parts of a conductive agent; 3-6 parts of a thickening agent; the MOFs material comprises an MOFs material taking a zinc-based metal matrix, a cobalt-based metal matrix, a vanadium-based metal matrix, an iron-based metal matrix, an aluminum-based metal matrix, a chromium-based metal matrix, a zirconium-based metal matrix or a lanthanide-series metal matrix as metal ions or metal cluster nodes, and the conductive agent comprises an organic polymer solid electrolyte material or an organic-inorganic composite solid electrolyte material. The surface protection slurry provided by the invention can form a protection layer with excellent lithium affinity, dendritic crystal resistance and stability on the surface of metal lithium.

This invention relates to transition layer materials and welding processes for welding dissimilar steel and aluminum materials, belonging to the field of welding technology. The transition layer material for welding dissimilar steel and aluminum materials of this invention comprises a copper layer, a copper alloy layer, and a zinc alloy layer arranged sequentially; the copper layer is adjacent to the steel base material, and the zinc alloy layer is adjacent to the aluminum base material; the copper content in the copper alloy layer is 62.0%-64.0%; the zinc content in the zinc alloy layer is 89.0%-91.0%; the mass ratio of the copper layer, copper alloy layer, and zinc alloy layer is (0.9-1.1):(2.3-2.7):(1.8-2.2). By sequentially setting the copper layer, copper alloy layer, and zinc alloy layer between the steel base material and the aluminum base material, a gradual transition from the steel base material to the aluminum base material is achieved, effectively avoiding the formation of brittle Fe-Al intermetallic compounds during direct welding, and enhancing the mechanical properties and durability of the welded joint.

This invention discloses a tensile self-reinforced topologically crosslinked recyclable polyurea material and its preparation method. Polyurea is modified with a four-arm topological crosslinking agent containing dynamic imine bonds to construct a dynamic topological crosslinking network. The topological structure restricts molecular chain slippage, inducing molecular chain orientation and network reconstruction under tension, thus achieving tensile self-reinforcement of the material. The polyurea material of this invention exhibits an initial tensile strength of 31.29 MPa and a fracture toughness of 181.15 MJ / m. 3 After pre-stretching, the strength can be increased to 42.09 MPa, and the toughness can be increased to 202.26 MJ / m. 3 It also has excellent recyclability and can be widely used in building protection, impact resistance engineering, aerospace and other fields.

The invention belongs to the technical field of asphalt pavement materials, and relates to dynamic crosslinking waste polyolefin plastic modified asphalt which comprises the following components in parts by weight: 100 parts of matrix asphalt and 5-30 parts of dynamic crosslinking waste polyolefin plastic, the dynamic crosslinking waste polyolefin plastic is prepared from the following components in parts by weight: 100 parts of waste polyolefin plastic, 2 to 6 parts of maleic anhydride, 2 to 6 parts of bisphenol A and 0.2 to 0.6 part of dicumyl peroxide. The problems that in the prior art, waste utilization is insufficient, and asphalt performance improvement is not remarkable are solved, dynamic covalent bonds are introduced into asphalt modification through formation of the dynamic covalent bonds in the dynamic crosslinking waste polyolefin plastic, good pavement performance is achieved, and meanwhile, based on reversibility of the dynamic covalent crosslinking structure, the asphalt performance is improved. And the modified asphalt is endowed with good reprocessability.

The invention relates to the technical field of automobile parts, and particularly discloses an anti-oxidation corrosion-resistant automobile air-inlet grille and an electroplating process thereof.The anti-oxidation corrosion-resistant automobile air-inlet grille is prepared from phenoxy-terminated siloxane modified polycarbonate, ABS resin, a modified LDHs antioxidant, a compatilizer ABS-g-MAH and a lubricant ethylene bis stearamide through melt blending, extrusion granulation and injection molding. And a copper layer, a nickel-phosphorus layer and a cobalt-chromium layer are further electroplated and deposited on the automobile air-inlet grille, and the anti-oxidation and corrosion-resistant automobile air-inlet grille is formed.

The application provides a high-strength and high-ductility steel pipe concrete column, which comprises a rectangular outer steel pipe and arc-shaped inner steel plates connected to each steel pipe surface on the inner side of the rectangular outer steel pipe, the arc-shaped inner steel plates and the steel pipe surfaces on the inner side of the rectangular outer steel pipe form four closed and non-intersecting cavities, the core area is outside the cavities in the rectangular outer steel pipe, and the core area is filled with concrete; the arc-shaped inner steel plates provide a constraint similar to a round steel pipe on the core of the concrete column, so that the concrete in all areas inside the outer steel pipe can be well constrained, meanwhile, the arc-shaped inner steel plates provide a supporting action for the outer steel pipe, effectively delay the local buckling deformation of the rectangular outer steel pipe, and the steel pipe concrete column component has high strength and good ductility.

The invention belongs to the technical field of metal material processing, and discloses a cold rolling method for overcoming brittle fracture of non-oriented silicon steel for a new energy automobile, which comprises the following steps: S1, normalizing treatment: heating at 920-1000 DEG C for 2.5-4 minutes; s2, pickling treatment: pickling in an acidic aqueous solution, then soaking in a clean water tank, neutralizing with an alkaline aqueous solution, blow-drying and coating oil to prevent rusting; s3, heating treatment is conducted, specifically, the workpiece is placed in a box-type resistance furnace, and heat preservation is conducted for 20-120 min under the condition of 200-500 DEG C; s4, cold rolling is conducted, specifically, hot rolling is rapidly conducted on a cold-rolling mill; and S5, continuous annealing is conducted, specifically, continuous annealing is conducted at the strip steel speed of 85 m / min to 95 m / min, and the annealing soaking temperature is 920 DEG C to 1000 DEG C. The technical problem that when silicon steel cold rolling is carried out in a laboratory environment, the edge of a cold-rolled plate is cracked or brittle fracture occurs is solved.

The present application relates to the technical field of medicine, in particular to a kind of Ai Huangcao cream and its preparation method and application.The Ai Huangcao cream formula is composed of Ai Naxiang oil, egg yolk oil, radix ligustici glauci oil, white vaseline, stearic acid, glycerin monostearate, liquid paraffin, propyl gallate, Tween-80, triethanolamine, sodium dodecyl sulfate, glycerol and water.The Ai Huangcao cream prepared by the preparation method of the present application has good appearance, ductility, centrifugal stability, cold resistance and heat resistance stability.Meanwhile, through skin irritation experiment and rat burn and scald experiment, it is confirmed that the Ai Huangcao cream is safe and has no skin irritation, and has good therapeutic effect on rat grade II burn and scald model.

The invention relates to the field of food processing, and particularly discloses a bread fermentation accelerant and application thereof in bread baking. The bread fermentation accelerant comprises isomaltooligosacharide, galactooligosaccharide and fructo-oligosaccharide in a mass ratio of 5: (2-4): (1-2). The bread fermentation accelerant has the advantages that the bread fermentation accelerant can be used for bread with the high dietary fiber content, the fermentation capacity of the bread with the high dietary fiber content is improved, the specific volume of the bread is increased, and the bread is full and complete in appearance, soft and elastic in texture, spongy in tissue, uniform in air hole, good in ductility, golden in color and luster, fragrant, soft and delicious.

The utility model discloses a modified buried sprayer device, which belongs to the technical field of irrigation equipment and comprises a pipe joint, a left connector, an upper connector, a right connector and a lower connector are arranged on the pipe joint in a cross shape, an extending pipe is formed on the upper connector inwards, the lower connector is fixedly connected with a bottom sealing pipe, and the lower end of the bottom sealing pipe extends towards the lower side. A first vertical pipe, a second vertical pipe and a third vertical pipe are sequentially and coaxially arranged on the inner side of the bottom sealing pipe from outside to inside, the upper end of the first vertical pipe is connected with the extension pipe, the left connector and the right connector are connected to the water conveying pipeline, and a channel for communicating the left connector and the right connector is formed between the first vertical pipe and the bottom sealing pipe in a spaced mode; the second vertical pipe is installed on the first vertical pipe in a sliding and sealing mode, the third vertical pipe is installed on the second vertical pipe in a sliding and sealing mode, and the upper end of the third vertical pipe is connected with a spray head assembly. According to the device, the requirement for water pressure is smaller, the buried spray head device can be easily driven to work, and the working process is more stable.

A kind of TiAl alloy shaped blank package rolling method of imitating asynchronous rolling and TiAl alloy plate, the method comprises the following steps: preparing TiAl alloy shaped blank; The prepared TiAl alloy shaped blank is placed in the recess of corresponding stainless steel package, a composite isolation layer is filled between the TiAl alloy shaped blank and the outer layer stainless steel package, and welding is carried out, to obtain the TiAl alloy package blank of imitating asynchronous rolling;The obtained TiAl alloy package blank of imitating asynchronous rolling is placed in high temperature furnace, heated to 1100-1350 DEG C, and kept for 0.5-5h, then package rolling is carried out along the specified direction, and after every two passes, it is returned to the furnace and kept for 5-30min, after rolling, the rolled TiAl alloy package plate is placed in vacuum furnace for stress relief annealing;And the package shell on the rolled TiAl alloy package plate is removed by wire cutting method, to obtain TiAl alloy plate with deformation≥90%.The application also provides TiAl alloy plate prepared by the method.

The utility model belongs to the technical field of building construction, and particularly relates to a double-layer reinforcement cage with a positioning function, which comprises a framework steel bar, and a reinforcing mechanism is welded on the side wall of the framework steel bar. The outer-ring stirrups and the inner-ring stirrups can enhance the punching resistance of the pile top and restrain the core concrete to improve the bearing capacity of a pile body, the double-layer stirrups act synergistically to resist water and soil pressure, local loads can be evenly dispersed to an overall framework, the anti-seismic and anti-impact capacity is improved, meanwhile, the core concrete is restrained by the inner ring, and the outer-layer concrete is restrained by the outer ring; the gradient constraint effect is formed, crack development is delayed, ductility is improved, the top fixing ribs can make the structure of the reinforcement cage more stable, and meanwhile a platform can be provided for follow-up equipment installation.

The application belongs to the technical field of stainless steel preparation, and discloses a cold-deformable and heat-treatable hardening Ni-free high-strength stainless steel and a preparation method thereof. The stainless steel comprises the following components in percentage by mass: Cr: 13-15%, C: 0.25-0.4%, Mn: 0.5-2%, Cu: 0.1-3%, Mo: 2-3%, Si: 0-0.5%, and the balance of Fe and inevitable impurities. The stainless steel does not contain Ni element, has a low work hardening rate (strain hardening index n≤0.185) and a fracture elongation rate of more than 20% in a soft state (annealed state), is cold-deformable, and has low raw material and processing costs; after quenching and aging heat treatment, the stainless steel not only has an optimal combination of strength and toughness (yield strength and tensile strength are more than 1300 MPa and 1600 MPa respectively, and elongation is greater than 10%), but also has a high yield strength ratio.

This invention provides a microemulsion gel of traditional Chinese medicine (TCM) compound essential oils, its preparation method, and its application, relating to the technical field of TCM compound essential oil preparations. Following TCM theory and based on the principle of syndrome differentiation and treatment, this invention yields a microemulsion gel of TCM compound essential oils composed of Bupleurum chinense essential oil, Citrus reticulata peel essential oil, Ligusticum chuanxiong essential oil, Murraya paniculata essential oil, and Nardostachys chinensis essential oil, which has the functions of soothing the liver and regulating qi, promoting blood circulation and relieving pain. Based on single-factor experiments, this invention uses response surface methodology to optimize the formulation of the TCM compound essential oil microemulsion gel, ultimately obtaining a uniform, stable, and easily spreadable microemulsion gel. The TCM compound essential oil microemulsion gel of this invention can effectively improve depressive-like behavior in mice under chronic unpredictable stress and reduce the levels of inflammatory factors in the CUMS mouse model, effectively improving the bioavailability of active ingredients in plant essential oils. This invention provides reference and guidance for the development of new dosage forms for the prevention and treatment of depression and the application of TCM essential oils.

The utility model discloses a paper diaper with double anti-side-leakage partition edges, a paper diaper main body comprises a surface layer, an absorption layer and an anti-leakage bottom layer, a first anti-leakage partition edge and a second anti-leakage partition edge are arranged on two sides of the paper diaper main body, a first water-repellent layer a and a second water-repellent layer a are clamped in the first anti-leakage partition edge, and a second water-repellent layer a is clamped in the second anti-leakage partition edge. Compared with a traditional split type leakage-proof partition edge, the first leakage-proof partition edge and the second leakage-proof partition edge are integrally folded and formed and are provided with at least one water repellent layer, so that the connection strength between the leakage-proof partition edge and the paper diaper body is enhanced, and the leakage-proof partition edge has the advantages that the leakage-proof partition edge and the paper diaper body are integrally folded and formed and are provided with at least one water repellent layer; the side leakage prevention performance of the paper diaper is improved, the first leakage prevention partition edge and the second leakage prevention partition edge have high ductility, under the condition that a user frequently moves, side leakage of urine can be effectively prevented, and all-around protection is provided for the user.

The utility model discloses a kind of narrow flange H-shaped steel beam lower flange distortion buckling structures. The structure is composed of H-shaped steel beam, reinforced concrete floor, T-shaped transverse stiffening rib, H-shaped embedding fixture and stud. By symmetrically setting T-shaped transverse stiffening rib on both sides of H-shaped steel beam web, it forms H-shaped combined cross-section transverse stiffening rib, improves the bending stiffness and strength of transverse stiffening rib, and at the same time, extends H-shaped transverse stiffening rib upward and embeds it in reinforced concrete floor, improves the restraint capacity outside H-shaped steel beam surface, thereby effectively solves the problem of narrow flange H-shaped steel beam lower flange distortion buckling. It improves the stability of steel beam lower flange, saves cost, has good economic benefit and beneficial effect.

This invention discloses a five-layer electrodeposited high-sealing corrugated pipe based on ultrasound assistance and its preparation method, belonging to the technical field of metal corrugated pipe manufacturing. It aims to solve the problem that in multi-layer electrodeposited corrugated pipes, it is difficult to effectively coordinate current density, surface quality, and interfacial bonding strength, leading to insufficient densification of the deposited layer, unstable interlayer bonding, poor wall thickness uniformity, and failure to meet airtightness standards, ultimately resulting in poor overall performance stability. This invention includes a five-layer composite structure in which the pipe wall is composed of alternating nickel-cobalt alloy and copper layers. Each layer of the five-layer composite structure undergoes ultrasonic vibration treatment during deposition. The corrugated pipe prepared by this invention has a uniform and dense deposited layer with good interlayer bonding. The five-layer alternating deposition layer composite structure not only achieves uniform stress transmission and dispersion, effectively delaying crack propagation and interfacial penetration, but also improves the uniformity of wall thickness distribution, enabling the corrugated pipe to exhibit higher structural stability and long-term reliability in a sealed environment.

The application discloses a high-strength and high-plasticity ferrite single-phase automobile structure steel and a production method thereof, and chemical components and weight percentage contents of the automobile structure steel are as follows: C 0.03-0.06%, Si 0.3-0.6%, Mn 0.5-0.9%, S less than or equal to 0.006%, Al 0.1-0.25%, Ti 0.10-0.13%, Nb 0.01-0.02%, Mo 0.0001-0.003%, and the balance of Fe and inevitable impurities. The automobile structure steel has a thickness of 2-10 mm, a lower yield strength greater than or equal to 600 MPa, a tensile strength of 700-850 MPa, an elongation greater than or equal to 25%, a hole expansion ratio greater than or equal to 75%, and a difference between transverse and longitudinal yield strengths less than or equal to 30 MPa, and a shearing section cold bending radius is half of the thickness, and a cold bending angle is 180 degrees, so that the hot-rolled steel plate has a single ferrite structure, and a surface layer has a high-ductility ferrite fine-grain layer, the steel plate has excellent forming performance, and meets the requirement of high formability of the steel plate when a vehicle enterprise is lightened.

This application discloses a rubber reeling chain device and a corn harvester, belonging to the field of agricultural machinery technology. It includes a reeling chain body, a pusher plate, a limiting component, and a reeling chain core. The reeling chain body has a ring-shaped structure, with pushers spaced apart on the outer side of the reeling chain body. Both the reeling chain body and the pushers are made of rubber. The limiting component is located on the inner side of the reeling chain body and is used to install and limit the reeling chain core. The reeling chain cores are arranged along the inner side of the reeling chain body, forming a limiting cavity between adjacent reeling chain cores. The reeling chain body is used to engage with the teeth of an external sprocket through the limiting cavity and thus wrap around the sprocket. The pusher plate is driven by the reeling chain body to push the material. The reeling chain body and pusher plate are made of rubber, and the reeling chain cores are arranged and installed on the inner side of the reeling chain body through the limiting component, facilitating the engagement of the reeling chain cores with the teeth of the external sprocket and making it easier to replace a metal chain.

The invention relates to a magnesium-based hydrogen storage material and a preparation method thereof, and belongs to the technical field of hydrogen storage alloy materials and preparation thereof. The hydrogen storage material is an Mg-5Ni alloy with Sm powder uniformly distributed on the surface layer and an amorphous / nanocrystalline structure in the interior. The Sm powder is wrapped by the surface layer of the Mg-5Ni alloy to form composite powder of a core-shell structure; the hydrogen storage material is prepared from Mg-5Ni alloy powder and Sm powder as raw materials, and the raw materials are mixed and then subjected to dry ball milling. The hydrogen absorption and desorption kinetics of the existing magnesium-based hydrogen storage material can be effectively improved, the hydrogen desorption activation energy of the magnesium-based hydrogen storage material is reduced, and the problem that a solid additive is difficult to uniformly distribute on the surface is solved.