103results about How to "Increase the amount added" patented technology

The invention provides a positive electrode material and a preparation method thereof, a positive electrode slurry, a positive electrode plate, a lithium ion battery and a preparation method thereof, the positive electrode material is applied to a battery, the battery comprises an electrolyte, the electrolyte comprises lithium hexafluorophosphate and an organic solvent, the positive electrode material comprises a positive electrode active substance and lithium carbonate, and the organic solvent comprises lithium hexafluorophosphate and lithium carbonate. The lithium carbonate is coated on the surface of the positive active material, and the mass ratio of the positive active material to the lithium carbonate is 1: (0.001-0.03). The surface of the positive active material is coated with a layer of lithium carbonate, the lithium carbonate can react with lithium hexafluorophosphate in electrolyte, and a lithium difluorophosphate coating layer is generated on the surface of the positive active material in situ, so that the addition amount of lithium difluorophosphate in the battery can be effectively increased, and the performance of the battery is improved.

The invention belongs to the technical field of amino acid production, and discloses a method for reducing the content of potassium ions in a culture medium, which comprises the following steps: dividing a fermentation culture medium for producing glutamic acid by microorganisms into a fermentation culture medium A and a fermentation culture medium B, and maintaining the content of potassium ions in the fermentation culture medium A to be 50% or less of that in the fermentation culture medium B. By optimizing the addition amount of potassium ions in the non-fermentation stage, the glutamic acid production rate is increased, and the fermentation period is shortened.

The invention relates to the technical field of aluminum alloy materials, and discloses a high-strength regenerated aluminum alloy profile for an automobile anti-collision beam and a preparation process of the high-strength regenerated aluminum alloy profile for the automobile anti-collision beam, and the profile is 6063 alloy and comprises the following raw materials in percentage by mass: 45-55% of waste aluminum and 0.3-0.6% of Si; 0.5%-0.8% of Mg; 0 to 0.1 percent of Zn; 0 to 0.08% of Cu; 0 to 0.08% of Mn; 0.2%-0.45% of Fe; 0.01%-0.06% of Ti, and the balance Al and impurities with the content lower than 0.05%. The profile is obtained by carrying out casting, homogenization, extrusion, straightening, solid solution treatment and aging treatment on raw materials. According to the high-strength regenerated aluminum profile prepared through the scheme, the adding proportion of the waste aluminum can reach 45%-55%, the highest Fe content can reach 0.35% of the upper limit in the range of GB / T 3190-2020, the technical bottleneck that under the condition of the high waste proportion, the Fe element is excessive, thick intermetallic compounds are easily formed, and consequently the formability of the profile is poor is broken through, and harmless or beneficial conversion of the Fe element is achieved. And the section bar obtained by the scheme is a regenerated aluminum section bar with higher strength, high forming performance and low carbon emission factors, and unification of technology, economy and environment is realized.

The invention discloses a high-temperature-resistant cleaning type spacer fluid, and relates to the technical field of oilfield development and drilling, and the spacer fluid comprises the following components in parts by weight: 0.2-3 parts of a mixture of xanthan gum and modified diquat, 2-15 parts of an efficient cleaning agent, 0.5-5 parts of an anti-pollution agent, 0.2-3 parts of a dispersant, 0.1-0.5 part of a defoaming agent, 0.5-5 parts of ultrafine powder, 30-80 parts of a weighting agent and 25-90 parts of water. The spacer fluid has good compatibility with cement paste and drilling fluid, can keep stable performance at a high temperature of 220 DEG C, and has a good flushing effect.

According to the livestock and poultry manure stacking fermentation device, a stacking box body is stacked, a heat preservation box body is arranged outside the stacking box body, the material stacking amount is increased, meanwhile, the occupied area is small, stacking of different layers can be conducted according to the types of different fermentation materials, for example, pig manure is low in organic matter content, many in crude fiber, short in fermentation period and small in layer number; the chicken manure is high in organic matter content, long in fermentation period and large in layer number; sludge is complex in organic matter component, high in organic matter content, long in fermentation period and large in layer number. Materials are subjected to multi-layer fermentation stirring in the heat preservation box body, heat preservation treatment is carried out through the heat preservation box body, the fermentation effect is improved, meanwhile, air inlet holes are formed in the lower portion, exhaust holes are formed in the upper portion, and under the influence of heat generated by fermentation, air at the lower portion rises and is exhausted through the exhaust holes, so that external air enters through the air inlet holes at the lower portion; air flow is formed, air is supplemented into the heat preservation box body, and enough oxygen is provided for fermentation.

The invention provides a low-odor ratproof extrusion-grade polypropylene material, a preparation method and an electrical material, and belongs to the field of polypropylene materials. The polypropylene is used as a main body, the flexibilizer is used for modifying the polypropylene, the used flexibilizer is linear low-density polyethylene and polyolefin elastomer, the melt strength of the flexibilizer is higher, the flexibilizer and the polypropylene are all olefins and have good compatibility, the price of the low-density polyethylene is lower, and the price of the polyolefin elastomer is higher, so that the low-density polyethylene, the polyolefin elastomer and the low-density polyethylene are combined, and the polypropylene is modified. According to the low-odor rat-proof extrusion-grade polypropylene material, the impact resistance of the polypropylene material is enhanced while the production cost is guaranteed, meanwhile, in order to improve the flame retardance of the low-odor rat-proof extrusion-grade polypropylene material, the flame retardant and the mineral substances are added, and the rat-proof agent is further added to prevent the material from being bitten by rats and insects and causing damage to the material; in addition, a special thread element is used in the double-screw extruder, so that the feeding amount is increased, the shearing heat is reduced, the melt temperature is reduced, and the odor grade of the material is reduced.

The invention provides a fiber yarn containing a basalt material. The fiber yarn comprises a core layer and a skin layer wrapping the core layer. The core layer comprises 77-84 parts by weight of polyester, 15-20 parts by weight of basalt fiber powder and 1-3 parts by weight of a coupling agent; and the skin layer comprises polyester. Compared with the prior art, the basalt fiber is added into the polyester fiber in the form of a powder material, the characteristic of low heat conductivity of the basalt fiber can be exerted, and the heat preservation function of the polyester fiber is improved; meanwhile, the limitation that basalt inorganic fibers are high in rigidity and cannot be applied to the field of civil textile and clothing is overcome; and the basalt fiber powder is added into the core layer part of the polyester fiber, so that the addition amount of the powder can be increased to the maximum extent, and the influence of the material color and the fiber rigidity of the polyester fiber is reduced.

The invention discloses a protection liquid for green light cutting and a preparation method and application thereof.The protection liquid is prepared from, by mass, 20-40 parts of water-soluble resin, 0.25-0.5 part of a green light absorbent and 50-100 parts of a solvent; wherein the water-soluble resin comprises water-soluble polyester and sodium polystyrene sulfonate; the green light absorbent comprises allura red and lac acid. The water-soluble resin is not easy to etch, the etching selection ratio is high, and the etching depth required by the base material can be met under the condition that the loss of the protective film layer is minimum; the relatively high solubility of sodium polystyrenesulfonate is beneficial to improving the solid content of the resin, improving the thickness of a film layer and improving the stability of the protection liquid; besides, the green light absorbent adopts the combination of allura red and lac acid, so that the solution stability and the light stability of the green light absorbent can be ensured, the addition amount of the absorbent is increased, and the absorbance is improved.

The invention discloses high-flexibility modified silicate as well as a preparation method and application thereof, and belongs to the technical field of coating industry. The high-flexibility modified silicate is prepared by reacting a polyamine polymer, epoxy silane and silicate and then carrying out surface hydrophobic modification through alkylsilane; wherein the epoxy group in the epoxy silane is connected with the amino group in the polyamine polymer through reaction, the silicon hydroxyl group in the epoxy silane is connected with the silicon hydroxyl group in the silicate through reaction, and the alkyl silane and the hydroxyl group on the surface of the silicate particle are subjected to hydrolytic condensation; the polyamine polymer is a primary amine or secondary amine polymer; the epoxy group silane is alkoxy group silane containing a glycidyl ether structure; and the alkyl silane is trialkoxy silane. The modified silicate is applied to a water-based inorganic coating, so that the flexibility and the stability of the inorganic silicate coating are improved, and the problem of poor compatibility of the inorganic silicate coating and a polymer emulsion is solved.

The invention belongs to the technical field of electromagnetic shielding, and particularly relates to a PTFE electromagnetic shielding material and a preparation method and application thereof. The PTFE electromagnetic shielding material is of a three-layer sandwich structure, an upper layer and a lower layer are polytetrafluoroethylene conductive microporous film layers, a middle layer is a conductive layer, the polytetrafluoroethylene conductive microporous film layers comprise PTFE resin, a reinforcing material and a conductive material, the conductive layer comprises thermoplastic resin and a conductive material, the density of the PTFE electromagnetic shielding material is 0.55-0.80 g / cm < 3 >, the strength is larger than or equal to 25 MPa, the elongation at break is larger than or equal to 290%, and the thickness of the PTFE electromagnetic shielding material is larger than or equal to 10 mm. The volume resistivity is not more than 0.015 omega.cm, and the shielding effectiveness is not less than 80db. The PTFE electromagnetic shielding material has good conductivity and mechanical strength, the conductive material is large in filling amount and not prone to falling off, and the PTFE electromagnetic shielding material also has good flexibility, sealing performance, acid and alkali resistance, abrasion resistance and high-temperature resistance at the same time.

The present invention belongs to the technical field of polyether polyols, and specifically relates to a polyether polyol with high pentane miscibility and a preparation method thereof. The polyether polyol is composed of the following raw materials in parts by mass: 9 to 23 parts of small molecule polyols; 0.5 to 2.5 parts of amine catalysts; 12 to 43 parts of polyhydroxy stearates; and 47 to 66 parts of alkylene oxides. Polyhydroxy stearates are used as composite initiators, and through molecular structure design, polyhydroxy-rich fatty long chains are introduced into the molecular skeleton of polyether polyols, which significantly enhances the miscibility of polyether polyols with pentane. In addition, the polyhydroxy stearates also contain a large number of hydroxyl groups, which can directly participate in the polymerization reaction and firmly bond to the main chain of the polyether polyol, which not only optimizes the storage stability of the product, but also significantly improves its functionality and hydroxyl value, and verifies the high strength characteristics of the product in practical applications.

The present invention belongs to the technical field of tobacco products, and discloses a manufacturing system for a cavity feeding filter rod, including a feeding component, a bottom plug insertion component, a feeding component, and a middle plug insertion component. The bottom plug insertion component includes a bottom plug transfer component, a bottom plug feeding component, a first glue application component, and a first push component; the middle plug insertion component includes a middle plug transfer component, a middle plug feeding component, a second glue application component, and a second push component. The feeding component and the bottom plug feeding component respectively transfer the paper tube and the bottom plug to the bottom plug transfer component, the first glue application component applies glue to the bottom plug, and the first push component pushes the bottom plug into the paper tube; the feeding component pours the material into the paper tube, the feeding component transports the paper tube after the material is poured to the middle plug transfer component, the middle plug feeding component simultaneously transfers the middle plug to the middle plug transfer component, the second glue application component applies glue to the middle plug, and the second push component pushes the middle plug into the paper tube. The manufacturing system of the cavity feeding filter rod improves the manufacturing efficiency.

The invention relates to the technical field of matte ASA material processing, and discloses a matte ASA material and a preparation method thereof, the matte ASA resin comprises, by mass, 66.7-89.5 parts of styrene-acrylonitrile resin, 10-30 parts of an ASA graft copolymer, 0.5-3 parts of a matte auxiliary agent, and 0.05-0.3 part of an antioxidant. The preparation method comprises the following steps: mixing the raw materials, and carrying out twin-screw extrusion granulation. According to the technical scheme, the glossiness of the resin is reduced by introducing the matte additive, so that the problem that the toughness of the material is reduced while the glossiness is reduced by adopting BMAT and filler traditionally is avoided; besides, the ASA rubber powder is effectively dispersed by adopting a strong shearing screw combination, so that the phenomenon that the color and luster are not uniform during injection molding of a material produced by common shearing is avoided; the matte ASA material prepared by the method has low glossiness, soft surface gloss, small influence on mechanical properties, especially toughness, simple preparation method and low cost.

The invention discloses a porous brick with high porosity and high strength. The porous brick is obtained by carbonating, curing and curing porous brick slurry, the porous brick slurry is prepared from the following raw materials in parts by mass: 80 to 90 parts of steel slag, 70 to 120 parts of calcium magnesia, 0.01 to 0.08 part of alkali activator, 0.001 to 0.005 part of ethylenediamine tetraacetic acid, 2 to 5 parts of zeolite powder, 4 to 7 parts of fiber and 8 to 10 parts of water. The chemical components of the steel slag comprise silicon dioxide, aluminum oxide, magnesium oxide and calcium oxide; the calcium magnesite comprises the following components in percentage by mass: 45-65% of 26-40-mesh first-class sand, 5-15% of 40-70-mesh second-class sand and 20-40% of 70-120-mesh third-class sand. According to the high-porosity and high-strength perforated brick provided by the invention, on the premise that cement is not used and the production cost is greatly reduced, the perforated brick has high porosity and high strength at the same time, and the actual use requirements are met.

The present invention discloses a tobacco smoke column component, a filter rod, a heat-not-burn cigarette and a preparation method thereof. The preparation method comprises: using microcapsule technology to coat a functional substance and prepare it into a functional substance microcapsule powder, using a mold to press it into a smoke column component, further, using a filter rod forming machine and a composite filter rod forming machine to prepare the tobacco smoke column component into a filter rod, and further, using a cigarette making machine to prepare it into a heat-not-burn cigarette. The heat-not-burn cigarette prepared by the method has the performance of cooling and increasing fragrance, etc., and can improve the smoking quality of the heat-not-burn cigarette.

The present invention provides a roxburgh extract and its application in cosmetics or skin care products, belonging to the technical field of plant active ingredient extraction. The preparation method of the roxburgh extract comprises the following steps: S1: mixing oil with crushed roxburgh fresh fruit, and adding lipase; S2: stirring reaction at a certain temperature; S3: taking out after the reaction, adding demulsifier; separating oil phase and water phase, taking oil phase; S4: further dehydrating the oil phase to obtain the roxburgh extract; wherein the weight ratio of oil to roxburgh in step S1 is 1:5-5:1; the added mass of the lipase is 0.1-10% of the mass of oil. The extraction method of the present invention can gently dissolve the active ingredients in roxburgh in cosmetics or skin care oils, the extraction product is easy to separate, the roxburgh active ingredients can be stably present in the oil, and have significant effects in eliminating dark circles and whitening.

The invention mainly aims to provide a method for reducing bitterness of sorghum and application of the method in preparation of fine dried noodles, and the application specifically comprises the following steps: treating sorghum grains with steam explosion equipment to obtain a pretreated raw material; crushing the pretreated raw materials in a crusher, sieving with a 100-mesh sieve, and mixing with high gluten flour to obtain sorghum mixed powder; mixing the sorghum mixed powder with water to prepare sorghum dough, curing, tabletting and cutting into strips by using a noodle press, and naturally airing to prepare the fine dried noodles. By using the steam explosion technology, the bitterness in the sorghum grains is weakened, the nutritional value and quality of the sorghum fine dried noodles are improved, and industrial production of the sorghum fine dried noodles is facilitated.

The application discloses a kind of phosphogypsum road base water stable material and its construction method, by weight fraction, including calcined phosphogypsum 300~2000 parts, cement clinker 300~2000 parts, limestone 50~500 parts, toughening agent 1~10 parts, high-strength water-resistant agent 10~200 parts, sodium bentonite 50~100 parts, glass fiber 1~10 parts;The high-strength water-resistant agent is magnesium chloride, magnesium oxide, dimethyl chlorosilane is added with 1:1:0.05~0.5, the toughening agent is polyvinyl alcohol and EVA is mixed with 1:0.5~1 to form.The water stable material produced by using industrial by-product phosphogypsum calcined building gypsum as raw material has strong water resistance, high compressive strength and surface hardness, and is resistant to cracking caused by expansion;After premixing at construction site, road construction is carried out, the setting time meets the construction requirements, the water-soluble fluorine ion concentration of road surface is less than 3.50mg / L, water-soluble phosphorus pentoxide is not detected, the liquid leached under rainwater washing has no environmental pollution, the water stable material of the application enables the engineering of solid waste to be batched, and realizes the maximum resource utilization of phosphogypsum.

The invention provides a micron-sized rare earth cerium additive modified 1000MPa-grade high-strength steel submerged-arc welding flux as well as a preparation method and application thereof, and belongs to the technical field of flux preparation. The invention solves the problems of low low-temperature toughness, high crack generation tendency, burning loss of alloy elements and the like of the existing 1000MPa-grade high-strength steel submerged-arc welding deposited metal. The rare earth cerium additive is introduced into the welding flux, the additive can improve the fluidity of the welding flux so as to improve the welding quality, meanwhile, micron-sized rare earth cerium has the effects of refining grains and modifying inclusions, and the micron-sized rare earth cerium is matched with other components in the welding flux so that the strength of deposited metal can be enhanced, and the low-temperature impact toughness of the deposited metal can be improved. The flux can be used for welding 1000MPa-grade high-strength steel under the working conditions that the online energy is greater than 30kJ / cm and the thickness of a base metal plate is greater than 80mm, the mechanical property of deposited metal after welding is excellent, the construction cost of the high-strength steel for water-power engineering can be reduced, and the flux has remarkable economic benefits and social benefits.

The present invention pertains to the field of pharmaceutical chemistry, and discloses the use of a trans-amantadine derivative having a structure represented by Formula I or a pharmaceutically acceptable salt thereof in the manufacture of a medicament for preventing or / and treating respiratory diseases. The trans-amantadine derivative and salt thereof according to the present invention have better efficacy than ambroxol hydrochloride and amantadine hydrochloride derivative racemate (mixture of isomers). From a mouse acute lung injury test and an ammonia-induced cough model in mice, it is shown to have excellent effects in treating lung injury and cough, which are were statistically superior to those of ambroxol hydrochloride and amantadine hydrochloride derivative racemate. The trans-amantadine ammonia derivative and its hydrochloride salt of the present invention can significantly increase the amount of sputum excreted by rats compared with ambroxol hydrochloride, and can significantly increase the excretion of phenol red in mice, with effects better than those of ambroxol hydrochloride and amantadine hydrochloride derivative racemate.

The present invention relates to a preparation method and application of a supramolecular blue copper peptide nanocomposite, and belongs to the technical field of cosmetics. The structure of the supramolecular blue copper peptide nanocomposite of the present invention is: Myr-RHKRHKRHK-[GHK-Cu]-X, wherein X is a negatively charged active substance. Specifically, the present invention is synthesized by Fmoc solid phase method, modified by myristoyl, to obtain myristoyl dodecapeptide: Myr-(RHK)3GHK, a complexation reaction occurs in a copper sulfate solution, to obtain a supramolecular blue copper peptide: Myr-(RHK)3-[GHK-Cu], and the supramolecular blue copper peptide solution is compounded with a negatively charged active substance to obtain a supramolecular blue copper peptide nanocomposite. Compared with commercially available blue copper peptides, the supramolecular blue copper peptide prepared by the present invention can self-assemble into nano micelles in a solution, form nanocomplexes with negatively charged active substances, can quickly penetrate the skin, and has better stability, and can better solve the current problems of limited permeability and easy inactivation of blue copper peptides; it can directly target the inside of skin cells, reduce the amount of active substances added, improve bioavailability, and exert more excellent efficacy; at the same time, the supramolecular blue copper peptide itself can be used as a carrier to form a supramolecular nanocomplex with negatively charged substances such as nucleic acids.

The invention discloses a method for regulating and controlling a magnesium alloy long-range ordered stacking phase, and belongs to the technical field of metal materials. The process comprises the following steps: preparing raw materials according to alloy components and contents, smelting, and carrying out solution treatment. The LPSO phase regulation and control technology provided by the invention can be used for preparing Mg-Gd-Zn-L series alloys. According to the method, the LPSO phase in the Mg-Gd-Zn-Li alloy can be effectively regulated and controlled by controlling the content of the L element and carrying out composite solution treatment, the solution treatment temperature required for regulating and controlling the LPSO phase can be remarkably reduced by adding the L element, and the solution treatment time is shortened. Compared with the prior art, the LPSO phase regulation and control method is higher in efficiency and more remarkable in practical value.

The invention provides a method for preparing sludge coal slurry by sludge pretreatment, which comprises the following steps: treating sludge by using a modifier and heating and stirring coupling, and then mixing and stirring the pretreated sludge with pulverized coal, water and a dispersing agent to prepare sludge coal water slurry; and adding the crushed raw coal, the pretreated sludge, water and a dispersing agent into a ball mill, and grinding to obtain the sludge coal water slurry. The sludge is pretreated by heating and stirring and coupling with the modifier, so that on one hand, cell walls of microorganisms can be destroyed, protein is easy to biodegrade, and pretreatment reaction is accelerated, and on the other hand, a flocculation structure of the sludge can be destroyed, water in the flocculation structure is released, the fluidity of the sludge is improved, and the water in the sludge is fully utilized; and the water consumption in the pulping process is saved. The method solves the problems that the flocculent structure bundle of the sludge is strong in water property, high in water content and difficult to treat, and finally realizes reduction, recycling and harmless utilization of the sludge.

The invention relates to a ketoxime-terminated siloxane halogen-free environment-friendly flame-retardant adhesive, which belongs to the technical field of adhesive preparation and specifically comprises the following raw materials in parts by weight: hydroxyl silicone oil, dimethyl silicone oil, a flame-retardant fire retardant, fumed silica, a cross-linking agent, a coupling agent, a chain extender, an organic tin catalyst and an end-capping catalyst. The modified ammonium polyphosphate is self-made, the compatibility of the modified ammonium polyphosphate and the basic polymer hydroxyl silicone oil is improved, the additive amount of the modified ammonium polyphosphate in a system is increased, and the flame-retardant and fireproof performance of the system is improved to a certain extent; on the basis, the self-made modified ammonium polyphosphate and the cage-shaped phosphate melamine salt are compounded to form the flame-retardant fireproof agent, and the flame-retardant fireproof agent is added into the preparation of the flame-retardant adhesive, so that the flame-retardant adhesive finished product has excellent flame-retardant and fireproof performance. Meanwhile, the flame-retardant adhesive finished product prepared according to the formula disclosed by the invention also has excellent tensile modulus and cohesiveness.

The invention provides a fly ash-based PVC light foaming floor. The fly ash-based PVC light foaming floor comprises the following raw materials: fly ash, PVC, a coupling agent, a foaming agent, a color master batch and a functional additive, the foaming agent is an azodicarbonamide foaming agent and a sodium bicarbonate foaming agent. According to the invention, two different foaming agents are combined and have synergistic interaction, so that the foaming effect is excellent, and the dead weight of the fly ash-based PVC floor can be obviously reduced even if the addition amount of fly ash is increased. The fly ash-based PVC light foaming floor prepared by the invention has the advantages of light dead weight, higher bending strength, lower water absorption rate and excellent performance.

The utility model relates to the technical field of composite material pultrusion equipment, and particularly discloses a yarn pulling traction device for pultrusion equipment, which is positioned between an outlet of a forming die and a traction machine, is connected with the traction machine through a cloth belt and is connected with the outlet of the forming die through yarns; the yarn pulling traction device comprises at least two first pipe columns, a yarn pulling traction device and a yarn pulling traction device, the lower ends of the first pipe columns are fixedly provided with lower limiting plates, the upper ends of the first pipe columns are fixedly provided with upper limiting plates, and the first pipe columns are located at the left ends and the right ends of the lower limiting plates and the upper limiting plates; the second tubular column is located between the first tubular columns and is lower than the first tubular columns; the first tubular column and the second tubular column are used for connecting yarns and cloth tapes, and the yarns and the cloth tapes are connected to different tubular columns; first flanges are arranged in the front-back direction of the lower limiting plate, and second flanges are arranged in the front-back direction of the upper limiting plate. Therefore, the working efficiency is improved.

The invention discloses a vat dye dispersing agent and application thereof and a preparation method of vat dye, the vat dye dispersing agent is an aqueous solution of a copolymer and alkali, and the copolymer is one or more of an ethylene-maleic anhydride alternating copolymer, a propylene-maleic anhydride alternating copolymer and an isobutylene-maleic anhydride alternating copolymer. Different from a grafted copolymer, the copolymer is an alternating copolymer, and ethylene, propylene, isobutylene groups and maleic anhydride groups alternately exist in the structural unit of the copolymer. A basic unit of the olefin-maleic anhydride alternating copolymer is a hydrophobic olefin unit and a hydrophilic maleic acid group after alkali dissolution, so that the molecule has amphipathy. Different from a small-molecule dispersant, the dispersant can form a self-assembly structure in a vat dye dispersion liquid, and vat dye colloidal particles are better wrapped, so that better dispersing performance is shown. The dispersant only contains three elements of carbon, hydrogen and oxygen, does not contain elements of N, S and the like, and has relatively high environmental protection property.

The utility model relates to the technical field of building construction, in particular to a building construction cart with a protection function, which comprises a cart body, two groups of protection plates, a plurality of groups of fixing components, a plurality of groups of protection enclosing plates and a plurality of push rods, and the two groups of protection plates are respectively hinged with the cart body and are respectively positioned on two sides of the cart body. Each group of protective enclosing plates is fixedly connected with the corresponding protective plate and located on one side of the corresponding protective plate, each group of fixing assemblies is arranged on one side of the vehicle body and the protective plate and fixes the angle between the vehicle body and the protective plate, and the push rod is fixedly connected with the vehicle body and located at the upper end of the vehicle body. When damageable materials are operated, the protective plates and the protective enclosing plates are used for blocking and protecting, and when conventional materials are transported, the protective plates can be unfolded, so that the carrying space of the vehicle body is increased, and the flexibility of material transportation is improved.

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a polymer modified concrete material, which comprises the following steps: at normal temperature, adding modified silica powder and rubber powder into a polysiloxane / acrylate blended emulsion, quickly stirring and dispersing for 30-45 minutes, then adding dry stones, ordinary Portland cement and medium sand which are uniformly mixed in advance, uniformly stirring, and finally adding a curing agent for curing, thereby obtaining the polymer modified concrete material. After 28 days, the compressive strength of the polymer modified concrete material is 30-40 MPa, the tensile strength of the polymer modified concrete material is 2-3 MPa, the breaking strength of the polymer modified concrete material is 3-5 MPa, the elastic modulus of the polymer modified concrete material is 2 * 10 < 4 >-3 * 10 < 4 > MPa, and the maximum impermeable water pressure of the polymer modified concrete material can reach 1.4 MPa. Compared with traditional cement concrete, the concrete has the remarkable characteristics of high strength and good durability, has excellent impermeability and frost resistance, and can be widely applied to bridge deck engineering, tunnels, ports, expressways and other concrete engineering.

The utility model discloses a precision bearing with low noise and long service life, which comprises an inner ring sleeve, a shaft hole, a heat dissipation outer ring, rolling bodies, a retainer, lubricating grease, a sealing port and a sealing ring, the shaft hole is axially arranged in the middle of the inner ring sleeve, the heat dissipation outer ring is arranged on the outer side of the inner ring sleeve, the rolling bodies are distributed between the inner ring sleeve and the heat dissipation outer ring, and the retainer is arranged on the inner ring sleeve. The retainer is connected with all the rolling bodies, the lubricating grease is filled between the inner ring sleeve and the heat dissipation outer ring, the sealing port is formed outside the space between the inner ring sleeve and the heat dissipation outer ring, and the sealing ring seals the inner ring sleeve and the heat dissipation outer ring through the sealing port. According to the utility model, the problem that the service life is affected due to poor heat dissipation performance of lubricating grease in a sealing state because the lubricating grease is added for lubrication and needs to be sealed to prevent the lubricating grease from overflowing is solved.