235results about How to "Improve ductility" patented technology

The invention provides an ultrahigh-ductility cement-based composite material for ocean engineering and a preparation method of the ultrahigh-ductility cement-based composite material for ocean engineering. The concrete is prepared from the following raw materials in parts by weight: 250 to 500 parts of cement clinker, 400 to 600 parts of fly ash, 200 to 300 parts of mineral powder, 100 to 150 parts of silica fume, 160 to 240 parts of metakaolin, 600 to 900 parts of quartz sand, 10 to 20 parts of organic synthetic fiber, 20 to 30 parts of organic corrosion inhibitor, 180 to 240 parts of water and 1 to 8 parts of water reducing agent. The organic corrosion inhibitor provided by the invention can be combined with chloride ions to form a passive film, so that the corrosion of reinforcing steel bars and the invasion of the chloride ions into concrete are inhibited, and the durability of the concrete is improved; by regulating and controlling the mixing ratio of the four mineral admixtures and the mixing amount of the synthetic fiber component, the concrete can well consider high strength, high ductility, high durability, high flow state and excellent deformation resistance. The ultrahigh-ductility concrete for ocean engineering, which can meet the toughness requirements of high compression resistance, fracture resistance and impact resistance and the requirements of high chloride ion permeation resistance and steel bar corrosion resistance, can be obtained.

The utility model discloses a reinforcing device, which relates to the technical field of structural engineering, and comprises a reinforcing plate, fixed end anchorage devices and a midspan back shore mechanism, the two ends of the reinforcing plate are respectively connected with a reinforced member through the fixed end anchorage devices, the middle part of the reinforcing plate is connected with the reinforced member through the midspan back shore mechanism, and the middle part of the reinforcing plate is connected with the reinforced member through the midspan back shore mechanism. The midspan jacking mechanism is used for conducting prestress tensioning on the reinforcing plate. The reinforcing device is simple in structure, high in operability and capable of improving the ultimate strength and ductility of a reinforced component.

The invention discloses a high-performance environment-friendly UV (ultraviolet) adhesive for batteries and a preparation method thereof, and the UV adhesive is prepared from the following raw materials in parts by weight: 20-50 parts of acrylate prepolymer, 30-70 parts of first acrylate monomer, 1-10 parts of photoinitiator, 5-15 parts of thixotropic agent and 0.5-5 parts of other auxiliaries, the acrylate prepolymer is prepared from the following raw materials: compound polyol, isocyanate and a second acrylate monomer; the compound polyol comprises a flexible polyol and a hard polyol which are compounded according to a molar ratio of 1: (1-5). According to the high-performance environment-friendly UV adhesive for the battery, the viscosity is smaller than 5000 cps, Tg is larger than or equal to 70 DEG C, the elongation at break is larger than or equal to 550%, the shear strength is larger than or equal to 5 MPa, and the resistivity is larger than or equal to 109 omega.m. The UV adhesive disclosed by the invention has the characteristics of low viscosity, high thixotropy, convenience in sizing, short curing time, good flexibility of cured adhesive, high bonding strength and excellent heat resistance and insulating property.

The invention discloses a factory unmanned inspection device, which belongs to the technical field of inspection devices, and comprises a splicable guide rail, a walking mechanism, a detection seat, a gas detection mechanism, a stand column and a sealing clamping mechanism, and the gas concentration sensor is arranged on the sealing clamping mechanism and is electrically connected with the gas detection mechanism. According to the invention, the walking mechanism drives the detection seat to move on the splicing guide rail along the laying path of the pipeline, when the detection seat moves to the flange joint of the two adjacent pipelines, the sealing clamping mechanism acts, and the sealing clamping mechanism clamps the two adjacent pipelines and covers the flange joint of the two adjacent pipelines. The chemical gas leaked from the sealing surface at the flange joint enters the sealing clamping mechanism, the concentration of the chemical gas is detected by the gas concentration sensor, and the gas leakage is detected by the gas detection mechanism, so that the unmanned inspection of the pipeline leakage is realized.

The invention relates to the technical field of metal materials and processing thereof, and discloses a red copper foil sheet for electric flexible connection and a preparation process thereof, and the red copper foil sheet is prepared from the following components in percentage by weight: a base material: more than or equal to 99.95% of high-purity copper Cu; the content of phosphorus (P) is 0.001%-0.005%; silver (Ag): 0.01% to 0.05%; zirconium (Zr): 0.002%-0.01%; zinc (Zn): 0.002%-0.01%; 0.001% to 0.005% of rare earth elements (Ce and La); the oxygen content of the copper alloy is less than or equal to 0.005%. By means of the component design scheme of collaborative optimization of multi-element microalloying and rare earth modification, it is ensured that the red copper foil has high conductivity, high ductility and excellent welding performance, and compared with the technical scheme of single-element deoxidation or anti-softening treatment in the prior art, the copper foil has the advantages that the copper foil has high conductivity, high ductility and excellent welding performance.

The invention discloses tough, flame-retardant and hydrophobic reactive polyurethane (RPU) based on polyhydroxy ammonium polyphosphate as well as a preparation method and application thereof, and belongs to the crossing field of flame-retardant materials and multifunctional polymers. The specific preparation process is as follows: diglycolamine is grafted to the surface of ammonium polyphosphate through a one-pot ion exchange reaction, and hydroxylated ammonium polyphosphate (aAPP) is prepared. The preparation method comprises the following steps: preparing an aAPP-NCO double-end-capped prepolymer, then carrying out an addition polymerization reaction on the aAPP and the NCO double-end-capped prepolymer under a medium-free condition to prepare flame-retardant RPU (aAPPx-RPU), further introducing polydimethylsiloxane (PDMS) into an RPU main chain, and preparing the tough, flame-retardant and hydrophobic RPU by utilizing the synergistic effect of phosphorus (P), nitrogen (N) and silicon (Si). The preparation method of the tough, flame-retardant and hydrophobic RPU is green and efficient, and can be applied to the fields of fireproof flame-retardant materials, building materials, electronic materials and the like which need to improve safety and durability.

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 application discloses high-strength composite cement blanket and belongs to the technical field of civil engineering composite materials. The application improves the three-dimensional fabric structure: a three-dimensional weaving is adopted to form a top layer, a middle layer and a bottom layer, wherein the middle layer is formed by a honeycomb three-dimensional structure formed by interweaving vertical fiber filaments and horizontal oblique fiber filaments which are arranged obliquely relative to the vertical fiber filaments; the vertical fiber filaments connect the top layer and the bottom layer; and the horizontal oblique fiber filaments pass through the vertical fiber filaments in an S-shaped wiring mode multiple times to form limiting knots which are distributed in the top layer, the middle layer and the bottom layer to form an overall tensile strength reinforcing structure. The three-dimensional fabric can be combined with a "two cloth and one film" protective layer and a solidifiable composite material containing gold steel sand. The application realizes isotropic reinforcement through the honeycomb structure and builds a mechanical occlusal interface through the S-shaped limiting structure, thereby significantly improving the bending strength, interface adhesion and waterproof durability of the cement blanket, and the application is suitable for slope protection, trench lining and temporary road paving engineering and the like.

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.

A high-strength hot-rolled steel sheet according to the present invention has a specific chemical composition and a steel microstructure including, as main phases, 80% to 100% of martensite and bainite in terms of total area fraction. An entire area fraction of the martensite in the bainite is 2% to 20%. Among the martensite in the bainite, an area fraction of martensite each having an orientation difference of 15° or more between a crystal orientation of the martensite and a crystal orientation of at least one of bainite adjacent to the martensite is more than 50% relative to the whole martensite. When regions surrounded by boundaries between adjacent crystals having an orientation difference of 15° or more are defined as crystal grains, an average aspect ratio of the crystal grains present in a region extending from a surface of the steel sheet to a depth of 5 um is 2.0 or less.

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 discloses a composite floor slab reinforcing structure and a composite floor slab reinforcing method, a composite floor slab comprises at least two floor slabs which are arranged in an overlapped mode, and the reinforcing structure comprises at least one penetrating hole which penetrates through the composite floor slab in the thickness direction of the composite floor slab; and each inhaul cable is arranged in the corresponding through hole in a penetrating mode, and the two ends of each inhaul cable extend out of the end portions of the two sides of the corresponding through hole. Wherein each inhaul cable is formed by stacking a plurality of fiber cloth strips together and then screwing the fiber cloth strips together in a screwing mode, each inhaul cable and the inner wall of the corresponding penetrating hole are bonded together through structural adhesive, and the fiber cloth strips in the portion, located in the penetrating hole, of each inhaul cable are also bonded together through the structural adhesive; in addition, the two ends of each inhaul cable are attached and fixed to the surface of the floor on the corresponding side in the mode that the ends of the fiber cloth strips are scattered mutually. The reinforcing structure has the advantages of being simple in raw material, environmentally friendly, capable of saving energy, good in reinforcing effect and high in overall stability.

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 invention discloses a release agent for a carbon fiber composite material workpiece, and the release agent is prepared from the following raw materials in parts by weight: 5-8 parts of organic silicon modified epoxy resin, 2-5 parts of silicone oil, 0.1-1 part of an emulsifier, 1-2 parts of a defoaming agent, 1-2 parts of a dispersing agent, 3-5 parts of a stabilizer and 50-80 parts of an ionic aqueous solution. The invention also discloses a preparation process of the release agent for the carbon fiber composite material workpiece. The organic silicon resin is modified, and the polymethylphenylsiloxane and the interface modifier are added, so that the release agent is more uniform, the interface strength of the release agent is higher, the ductility and compactness of the release agent are increased, the release times of the release agent are increased, and the quality of the release agent is effectively improved.

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.