69results about How to "Not easy to break down" patented technology

The invention discloses an apparatus and a method for extrusion moulding of supercritical-fluid micropore plastic. The apparatus comprises an electric cabinet, a vibration exciter, a power unit, a plasticizing mixing unit, a supercritical fluid conveying unit and a moulding unit; the vibration exciter, the power unit, the plasticizing mixing unit and the moulding unit are in successive connection; the supercritical fluid conveying unit is arranged on the plasticizing mixing unit; and the vibration exciter, the power unit and the plasticizing mixing unit are all independently connected with the electric cabinet. The method comprises that the power unit drives a screw to rotate, the vibration exciter drives the screw to make periodic vibration at the axial direction; a material is plasticized and fused under the dual effects of shear force field and vibration force field of the screw; at the same time, the supercritical fluid conveying unit injects a supercritical fluid into a material barrel, and thus the supercritical fluid and the fused material rapidly form a single system of the supercritical fluid and a polymer melt under the dual force fields; and the single system finally enters the moulding unit for foaming fixing. The plasticizing mixing speed is fast, and the mixing effect of the supercritical fluid and the polymer melt is good.

The invention discloses a medium silicon molybdenum niobium spheroidal graphite cast iron material and a preparation method thereof. The medium silicon molybdenum niobium spheroidal graphite cast iron material is prepared from the following chemical components in percentage by mass: 2.8-3.2% of C, 4.2-4.5% of Si, less than or equal to 0.4% of Mn, less than or equal to 0.04% of P, less than or equal to 0.015% of S, 0.8-0.9% of Mo, 0.6-0.9% of Ni, 0.4-0.7% of Nb, 0.03-0.06% of Mg, 0.15-0.25% of V and the balance of Fe and inevitable other elements. Since C04 high-purity pig iron and waste steel are taken as raw materials, a medium-frequency induction furnace is adopted for smelting, and a carburant, silicon carbide, ferrocolumbium, nickel plates, ferrosilicon and ferrovanadium are added in different time phases of smelting, raw iron chemical components and smelting temperature expected by design can be achieved, and the product disclosed by the invention can be prepared through nodulization and two times of inoculation. By adopting the edium silicon molybdenum niobium spheroidal graphite cast iron material disclosed by the invention, an exhaust manifold of an engine can work under a working condition of about 800 DEG C, the high-temperature use property of the exhaust manifold can be improved, and the service life of the exhaust manifold can be prolonged.

The invention discloses a silicone oil shear thickening liquid-based cable joint explosion-proof device. The silicone oil shear thickening liquid-based cable joint explosion-proof device comprises aninner protecting layer, a middle protecting layer and an outer protecting layer, wherein the inner wall of the inner protecting layer is fixedly provided with a plurality of central support units, andthe inner protecting layer is filled with silicon oil; the middle protecting layer comprises a honeycomb structure and is filled with silicon oil shear thickening liquid; the outer protecting layer is fixed onto the outer wall of the middle protecting layer in a sleeve mode and filled with silicon oil. The silicone oil shear thickening liquid-based cable joint explosion-proof device can form a certain gap from a cable joint to improve the heat dissipation rate of the cable joint; the silicon oil and the silicon oil shear thickening liquid which are filled inside the silicone oil shear thickening liquid-based cable joint explosion-proof device can avoid explosive diffusion as well as large-area power outage.

The invention discloses microbalance ecological fertilizer special for yellow peaches. The microbalance ecological fertilizer is prepared from the following components in parts by weight: compost, humic acid, trace element amino acid chelate fertilizer, basic salt, polyglutamic acid, seaweed extract, calcium magnesium phosphate fertilizer, monoammonium phosphate, potassium sulfate, ammonium sulfate, silicon fertilizer and borax. The invention also provides a preparation method of the microbalance ecological fertilizer special for the yellow peaches. The microbalance ecological fertilizer disclosed by the invention has the advantages that according to the soil environment, by combining the growth habit and the environmental factors of yellow peach trees and controlling formula components and compositions proportions thereof, the purposes of increasing the utilization rate of the fertilizer, prolonging the fertilizer efficiency time, activating soil nutrients, adding beneficial microorganisms in soil, promoting nutrient absorption and the like of tree bodies, providing persistent and comprehensive nutrition supplies for growth of the yellow peach trees, increasing the quality of theyellow peaches, increasing the yield and increasing the income can be achieved.

The invention provides a lithium-ion electrolyte for improving an interface of a lithium ion pole piece, and relates to the technical field of lithium ion batteries. The lithium-ion electrolyte for improving the interface of the lithium ion pole piece comprises the following components in percentage by total mass:15%-27% of a lithium salt, 1.5%-6% of an additive and the balance of an organic solvent. The lithium-ion electrolyte for improving the interface of the lithium ion pole piece improves the heat stability of an SEI (Solid Electrolyte Interphase) film formed in the primary charge-discharge process of a lithium battery, and prolongs the charge-discharge cycle life of the lithium battery at the low temperature, the probability of swelling of the lithium battery is reduced, so that thesafety performance and the electrochemical performance of the lithium battery are improved, and the potential safety hazard of the lithium ion battery is reduced.

The invention provides a steel structure water-based fireproof coating. The water-based fireproof coating comprises the following components in parts by weight: 500-800 parts of inorganic powder; 4-10parts by weight of inorganic fiber; 300-500 parts by weight of an inorganic binder; 20-50 parts by weight of an organic binder; 90-110 parts by weight of an organic expanding agent; 1-2 parts by weight of a wetting agent; 2-3 parts by weight of a dispersant; 8-13 parts by weight of a humectant; 4-6 parts by weight of a tackifier and 1-2 parts by weight of a defoaming agent; wherein the inorganicpowder comprises expanded perlite and ultrafine alumina powder; wherein the organic expanding agent is prepared from melamine phosphate and dipentaerythritol. The inorganic-organic composite steel structure fireproof coating is high in strength and good in surface appearance. Due to the fact that the inorganic binding agent capable of being used for binding metal materials is used, the binding strength is high, and falling is not prone to happening under instantaneous high temperature. The fireproof performance of the inorganic material is added with the high-temperature expansion characteristic of the organic expansion material, so that the fireproof performance of the coating is excellent.

The invention relates to a method for preparing a super-hydrophobic film on an ultra-low carbon steel surface, and belongs to the technical field of surface treatment. The method for preparing the super-hydrophobic film on the ultra-low carbon steel surface comprises the steps of first depositing a phosphate coating on the surface of an ultra-low carbon steel substrate with a chemical deposition method, the surface roughness of the ultra-low carbon steel substrate reaches 1.7-2.6 [mu]m; then performing hydrophobic modification for the ultra-low carbon steel substrate with the phosphate coating deposited on the surface using saturated fatty acid with more than 12 carbon atoms. In the invention, a certain phosphate coating and a hydrophobic surface are formed on the substrate, with self-cleaning and anticorrosion functions; the method provided by the invention is widely applied to automobile industry and electrical equipment industry, such as anticorrosion of automobile sheet surfaces as well as corrosion resistance and non-viscosity of home appliance panels, and especially the corrosion resistant time of the treated substrate can be prolonged effectively without influence on the surface.

The invention discloses a negative electrode material applied to a lithium ion battery and a preparation method of the negative electrode material. The negative electrode material applied to the lithium ion battery is composed of a spinel lithium titanate nanotube and an activated carbon material. The method comprises the following steps: uniformly mixing tetrabutyl titanate and Li2CO3 (or lithium sources such as LiOH), regulating the mixture to be alkaline by using ammonia water and hydroxylamine hydrochloride, and then transferring into a high-pressure kettle and performing hydrothermal reaction at 100-200 DEG C for 24 hours above; cleanly washing the reacted product by respectively using deionized water and absolute ethyl alcohol, and roasting in vacuum at a certain temperature to obtain the spinel lithium titanate nanotube; and heating the activated carbon material at high temperature, and uniformly mixing the activated carbon material with the spinel lithium titanate nanotube to prepare the negative electrode material for the lithium ion battery. Spinel lithium titanate can guarantee the excellent circulating stability of the lithium ion battery, also has the advantages of over-charge resistance, heat stability, high security and large specific capacity, and has wide application prospect when serving as the material for the negative electrode of the lithium ion battery.

The invention discloses a drug composition containing baricitinib and a preparation method and application of the drug composition. The drug composition comprises the baricitinib and an auxiliary material which can be received pharmaceutically, wherein the auxiliary material comprises a filling agent and a disintegrating agent. The preparation method of the drug composition comprises the steps that the filling agent and the disintegrating agent are evenly mixed, so that the mixed auxiliary material is obtained; and then a baricitinib crude drug and the mixed auxiliary material are evenly mixed or pelletizing liquor containing the baricitinib crude drug is evenly mixed with the mixed auxiliary material, and drug-carrying pellets of the solid drug composition containing the baricitinib are obtained through pelletizing. According to the drug composition containing the baricitinib and the preparation method and application of the drug composition, the solid drug composition which can be dissolved out rapidly in vitro and contains the baricitinib is prepared by controlling the particle size of the baricitinib, using microcrystalline cellulose, mannitol and the like in the hydrophilic auxiliary material as the filling agent, and using croscarmellose sodium and the like as the disintegrating agent; and the preparation technique is simple and suitable for industrialization.

The invention discloses a flood prevention baffle and a working method thereof and relates to flood prevention devices. The flood prevention baffle is simple and firm in structure and good in sealing effect. The baffle comprises two or more stop blocks, flexible water bags, a hard water outlet, a pipeline, a water pump, a valve guide device and a water source. The flood prevention baffle has the advantages that in case of flood attack, the baffle can be accurately unfolded to stop flood and be folded and put away after the flood steps back, and other work is not affected; the baffle is constituted by the two or more stop blocks and the flexible water bags, and the structure is simple; the height of the baffle is 50-120 cm, and the baffle is small in size and convenient to transport; the stop blocks are connected through stand water bags, bottom edge water bags are arranged at the bottom edges of the stop blocks, and the total sealing effect is good; the guide device is adopted, and the baffle can be unfolded rapidly; the guide device further plays the function of reinforcing the flood prevention baffle, so that the flood prevention baffle is not prone to being shattered through flushing; the stand water bags and the bottom edge water bags are utilized for sealing spaces between the baffle and a wall and the ground, no additional sealing strip is needed, and the cost is saved.

Provided is a mineral absorption improver which has excellent safety and excellent taste, can be ingested for a long period, and can improve the absorption of minerals. The mineral absorption improver comprises an oligosaccharide and a fermented milk product as active ingredients. The mineral absorption improver can improve the absorption of minerals, particularly zinc, by a synergistic effect ofthe oligosaccharide and the fermented milk product, even though the mineral absorption improver is a composition having a lower oligosaccharide content than those of the conventional mineral absorption improvers. When the mineral absorption improver is prepared using galactooligosaccharide which is a compound hardly decomposed under acidic conditions, as the oligosaccharide, the mineral absorption improver can be added to compositions such as acidic foods and pharmaceutical preparations.

The invention relates to a carbon fiber heating ground mattress which is characterized by comprising an aluminum foil glass fabric layer (1), carbon fiber heating wires (2), an aluminum foil glass fabric adhesive tape layer (3) and two inner conductive wires (4), the aluminum foil glass fabric layer (1), the two inner conductive wires (4) and the aluminum foil glass fabric adhesive tape layer (3) are arranged from top to bottom in sequence, a single carbon fiber heating wire (2) or multiple carbon fiber heating wires (2) connected in parallel are connected between the two inner conductive wires (4), and the outer ends of the inner conductive wires (4) stretch out of the aluminum foil glass fabric layer (1) and the aluminum foil glass fabric adhesive tape layer (3). The carbon fiber heating ground mattress has the advantages of being good in even heating performance, good in radiation protection performance, high-temperature resistant, long in service life, dual-purpose in a dry paving mode and a wet paving mode, and especially convenient to mount and pave.

The invention relates to a colourfast rubber, which comprises the following components: 100 parts of nitrile-butadiene rubber, 18 parts of DM-300, 5 parts of carbon black N330, 60 parts of white carbon black, 6 parts of zinc oxide, 1.5 parts of SA, 3 parts of polyethylene glycol, 1.5 parts of a rubber dispersing agent L-24, 2 parts of 935P, 2 parts of acrylic resin MB-2, 1 part of RH-150, 2 parts of silicon oil, 3 parts of a rubber accelerator, 0.4 part of a rubber vulcanizing agent, and 0.2 part of N-cyclohexylthiophthalimide. The colourfast rubber provided by the invention has good stability, is colourfast during use and is unlikely to decompose, especially does not decompose to cause raw material pollution when it is used as a raw material tank or contacts with the reactants, and also has good abrasion resistance.

The invention discloses an environment-friendly rubber tire material. The material is prepared from the following raw materials in parts by weight: 0.5-1.5 parts of sulfur powder, 1-3 parts of polyester fibers, 1-2 parts of an anti-aging agent 2246, 1-2 parts of dimethicone, 10-20 parts of ethylene propylene diene monomer, 10-20 parts of natural rubber, 40-55 parts of butyl rubber, 30-35 parts of CPE resin, 1-1.5 parts of microcrystalline wax, 10-15 parts of carbon black, 2-4 parts of polytetrafluoroethylene, 2-4 parts of zinc stearate, 1-3 parts of fatty acid, 20-30 parts of fluorite powder, 1-2 parts of carnauba wax and 40-50 parts of compound intercalation modifying powder. The stable environment-friendly rubber is stable in chemical property, is not easily decomposed, does not contain lead, nickel and other toxic elements, and is environment-friendly rubber.

The invention provides an electroluminescent compound, and a thermal activation delayed fluorescence material and applications thereof, wherein the electroluminescent compound has a structure represented by a formula I, is a small molecular compound containing a boron heterocyclic ring, has TADF characteristic, and can be used as a thermal activation delayed fluorescence material in the light emitting layer of an OLED device, the OLED device comprises an anode, a cathode and at least an organic film layer located between the anode and the cathode, and the light emitting layer in the organic film layer comprises the thermal activation delayed fluorescence material. According to the invention, the electroluminescent compound can effectively reduce the overlapping between HOMO and LUMO through the special design of the molecular structure, so that the delta EST is reduced to less than 0.25 eV, the requirement that the triplet state energy reversely passes through singlet state is met, thetransmission capacity of two kinds of carriers is effectively improved, and the carrier balance is improved so as to significantly improve the light emitting efficiency of the OLED device.

The invention discloses a thermoplastic polyurethane elastomer of rolling-level and high temperature resistance as well as a preparation method thereof. The thermoplastic polyurethane elastomer of rolling-level comprises components in percentage by weight as follows: 30wt%-43wt% of isocyanate, 39wt%-63wt% of polymer polyols, 4wt%-12wt% of small molecule glycol, 0.5wt%-5wt% of diepoxysiloxane, 0.001wt%-0.1wt% of a catalyst, 0.5wt%-2wt% of PE wax, 0.3wt%-1wt% of an antioxygen and 0wt%-1wt% of a other additive. According to the elastomer, the heat resistance of the TPU is effectively improved andcan be produced at higher operating temperatures, the phenomenon of decomposition and product sticking is not easy appeared.

The invention discloses a complexation-system ionic liquid catalyst-HF solution, a preparation method and application thereof. The solution comprises an ionic liquid catalyst and anhydrous fluorinated hydrocarbon which are in a molar ratio of 1:5-50. The invention also discloses the application of the complexation-system solution in the fluorination of hydrochloric ether. The method comprises: adding hydrochloric ether and the complexation-system ionic liquid catalyst-HF solution to a high-pressure reactor; raise temperature to between 30 and 100 DEG C within one hour; performing reaction for 3 to 20 hours under the pressure between 1 and 2 MPa; and obtaining fluorine chlorine alkane by separating and purifying products after the reaction is over. The method has the advantages of mild conditions, low system pressure, easy separation and purification of fluorination products, easy control over convenient process operation and suitability for industrial production. Through appropriate treatment, the complexation-system solution can be regenerated and repeatedly used but still has good catalytic activity.

The invention discloses an improver of soil physicochemical characters and a preparation method of the improver of the soil physicochemical characters, and belongs to the improver for treatment of saline alkali soil. The improver comprises the following components in a mass ratio: 30 to 60 parts of straw, 10 to 20 parts of polyacrylamide, 30 to 50 parts of humus and 5 to 10 parts of inorganic salts; the inorganic salts containing elements which are necessary for crop growth such as calcium, magnesium, iron, zinc, boron and nitrogen are added in the improver, so that losses of a large number of the inorganic salts in soil due to salt leaching can be supplemented to meet the demands of the crop growth for the inorganic salts. The preparation method and the application method of the improver are simple, the use amount of the improver is small, the improver takes effect quickly, durable in effect and suitable for large-area popularization; after the improver is applied for 1 to 2 times, the soil structure can be obviously improved, and the amount of soil aggregates is increased, and salt ions in the soil can be further promoted to be leached; a plurality of substances such as polyacrylamide can enhance the permeability and permeability of the soil and reduce soil corrosion resistance, and further have good water retention, soil conservation and fertilizer slow-release performances.

The invention discloses a method for improving stability of glutamine in a stem cell culture medium. The method has the advantages that before the culture medium containing the glutamine is prepared, the glutamine and a nanometer material are prepared into composite nanometer gel particles, and then the composite nanometer gel particles are added into the culture medium to prepare; the chemical stability of the glutamine is effectively improved, and the easiness in decomposing is avoided; the hydrophilic solubility with distilled water is improved, the additional heating for dissolving is not needed in the preparation process of the culture medium, the dissolving speed is effectively improved, the problem of instability of chemical property of the glutamine is solved, the culture and accuracy of subsequent test result are effectively guaranteed, the error is reduced, and the culture survival rate of the stem cell culture medium and the accuracy of application study are improved; in addition, the external heating operation is avoided, the destroy to chemical property of other nutrient components is avoided, and the application range is widened.

A drawer assembly includes: drawers, arranged in a storage compartment of the refrigerator in a way of being capable of being pushed and pulled forward and rearward between a front extreme position and a rear extreme position; and two support assemblies in left-right parallel arrangement. Each of the support assemblies includes a support frame. The support frame is fixed to an inner wall of the storage compartment, is provided on an inner side with a first slideway extending forward and rearward, and is provided on a rear portion of the inner side with an elastic tongue. A left sidewall and a right sidewall of the drawer are respectively mounted on the first sideway of the support frame of one of the support assemblies in a forward and rearward slidable way.

Belonging to the technical field of bearings, the invention relates to a preparation method of a composite rubber material for water lubricated bearings. The method provided by the invention adopts acrylate rubber as the matrix material for mixing with nitrile butadiene rubber to prepare the composite rubber material for water lubricated bearings. The acrylate rubber is an elastomer formed by copolymerization of an acrylate main monomer, a vulcanization point monomer and a functional monomer, and has good mechanical properties, wear resistance and strong tear resistance. Acrylate rubber has stable chemical properties and good cold resistance, and at the same time has low gas permeability and good oil resistance. Nitrile butadiene rubber has good chemical resistant stability, good processability, fast vulcanization speed and high tensile strength. Therefore, mixing of acrylate rubber with nitrile butadiene rubber to prepare the composite rubber material for water lubricated bearings caneffectively improve the mechanical properties, high temperature resistance and oil resistance of the composite rubber.

According to a chlorine dioxide generator provided by the invention, a tubular reactor is adopted, and a reaction solution flows and turns at a certain speed in a pipeline by controlling the flow direction of the reaction solution and the parameters of a reaction tube, so that sufficient stirring is realized, and the reaction is uniform. Chlorine dioxide conversion rate tests show that the chlorine dioxide generator provided by the invention can enable the chlorine dioxide conversion rate to be greater than or equal to 95%, which is much higher than the national performance requirements on thechlorine dioxide generator. The chlorine dioxide generator provided by the invention is in a liquid phase and does not contain a gas phase, chlorine dioxide is not easy to decompose and explode, no leakage risk exists, and the safety of the reaction process is high; and a mixed liquid can flow out by adopting a water ejector with a lower vacuum degree, so that the energy consumption is reduced. In addition, the chlorine dioxide generator provided by the invention is stable and reliable in operation and stable in chlorine dioxide yield; the manufacturing cost is low, the structure is simple, and the industrial application prospect is good.

The invention relates to the field of waste gas treatment equipment, and in particular, relates to a wet-process tower for deacidification by a wet process. The wet-process tower comprises a flue gasinlet, a tower body, a flue gas cooling part and a flue gas dehumidifying part; the flue gas cooling part comprises a cooling part spraying device, a primary demisting layer made of PP and a cooling liquid circulating system arranged outside the tower, and the cooling part spraying device comprises a silicon carbide cooling part nozzle; the flue gas dehumidifying part is sequentially provided witha condensate collecting layer, a packing layer, a dehumidifying part spraying device, a secondary demisting layer, an anti-scattering net and a dehumidifying liquid circulating system which are arranged from bottom to top, and the dehumidifying liquid circulating system is arranged outside the tower body; the condensate collecting layer comprises a chimney cap, and the chimney cap is made of glass fiber reinforced plastics; the dehumidifying part spraying device comprises a dehumidifying part nozzle made of silicon carbide, the packing layer and the secondary demisting layer are PP packing layers, and the anti-scattering net is made of PP. The interior of the tower body is made of a certain material, so that the deacidification and dewhitening effects are improved, and higher pollutant discharge requirements are met.

The invention discloses a process for preparing prepared rehmannia root traditional Chinese medicinal decoction pieces, relates to the technical field of traditional Chinese medicinal decoction pieceprocessing, and solves the problem of medicinal property reduction of medicinal materials since massive sugar in the medicinal materials is lost in the preparation process. The preparation process comprises the following steps: soaking a rehmannia root raw material in deionized water after washing, adding a proper amount of lignin and cellulose into the deionized water, and treating for 1-3 hoursat 60-80 DEG C under a condition that the pressure intensity is 0.1-0.5MPa. By adopting the method, sugar in the rehmannia root raw material is prevented from massively losing in the processing process, so that the prepared rehmannia root traditional Chinese medicinal decoction pieces have better medicinal property, and an excellent medicinal efficacy is achieved in the using process.

The invention discloses a binary disinfectant. The binary disinfectant comprises a liquid A and a liquid B, wherein the liquid A comprises acetic acid having the mass concentration of 95-98% and sulfuric acid having the mass concentration of 95-98%, while the liquid B is hydrogen peroxide having the mass concentration of 27.5-35%. The invention also discloses a preparation method of the binary disinfectant. The binary disinfectant is characterized in that glacial acetic acid and hydrogen peroxide taken as the major raw materials and prepared into the binary packaged disinfectant so that the sterilization effect and the stability of the disinfectant can be enhanced and then the disinfectant is capable of killing hepatitis A and B viruses, persistent viruses, influenza viruses and bacterial spores, and also capable of killing salmonella typhi, vibrio cholera, diarrhea and escherichia coli. The binary disinfectant can be used as the major disinfectant for controlling various viruses and the hospital cross infection, and can be applied to the disinfection and sterilization of viral pollutants, indoor and outdoor environments, hospital wards, common bathing pools, kindergartens, public places, breeding industry, hog houses, food processing industry, sewage treatment and the like.

The invention provides a granular water-soluble fertilizer. The granular water-soluble fertilizer comprises small-grain urea with a nitrogen content of 46%, potassium nitrate, monopotassium phosphate, potassium sulfate, 73% monoammonium phosphate, magnesium sulfate, boric acid, gibberellin, polyglutamic acid, EDTA-Zn, EDTA-Fe, EDTA-Mn, fruit green, calcium stearate, sodium dodecyl benzene sulfonate, zeolite powder, chitosan, fish skin extract, polyvinyl alcohol, magnesium sulfate, fucitol calcium and water-soluble silicone oil. The preparation method comprises the following steps: preparation of carp skin extract, primary mixing and refining, heating, secondary refining, granulation and coating. The granular water-soluble fertilizer disclosed by the invention is good in solubility in a use process, is not easy to agglomerate, and is remarkable in yield increasing and quality improving effects compared with conventional fertilization, and an average yield increasing rate is 12.7%.

The invention discloses a medium silicon molybdenum niobium spheroidal graphite cast iron material and a preparation method thereof. The medium silicon molybdenum niobium spheroidal graphite cast iron material is prepared from the following chemical components in percentage by mass: 2.8-3.2% of C, 4.2-4.5% of Si, less than or equal to 0.4% of Mn, less than or equal to 0.04% of P, less than or equal to 0.015% of S, 0.8-0.9% of Mo, 0.6-0.9% of Ni, 0.4-0.7% of Nb, 0.03-0.06% of Mg, 0.15-0.25% of V and the balance of Fe and inevitable other elements. Since C04 high-purity pig iron and waste steel are taken as raw materials, a medium-frequency induction furnace is adopted for smelting, and a carburant, silicon carbide, ferrocolumbium, nickel plates, ferrosilicon and ferrovanadium are added in different time phases of smelting, raw iron chemical components and smelting temperature expected by design can be achieved, and the product disclosed by the invention can be prepared through nodulization and two times of inoculation. By adopting the edium silicon molybdenum niobium spheroidal graphite cast iron material disclosed by the invention, an exhaust manifold of an engine can work under a working condition of about 800 DEG C, the high-temperature use property of the exhaust manifold can be improved, and the service life of the exhaust manifold can be prolonged.

The invention discloses a high-strength stainless steel road guardrail, and belongs to the technical field of traffic facilities. The high-strength stainless steel road guardrail comprises stand columns and guardrail plates, more than two anti-blocking pieces are fixed on each stand column, and the anti-blocking pieces are fixedly connected with the guardrail plates through guardrail connecting reinforcing plates; each anti-blocking piece comprises two buffer sleeves which are sequentially connected between the corresponding stand column and a guardrail connecting reinforcing plate, and the two buffer sleeves are fixedly connected in the radial direction. An impact contact plane is arranged at the outermost end of the side, facing the road, of each guardrail plate, and the two ends of theimpact contact plane extend to the two ends of the guardrail plate respectively. Guardrail reinforcing ribs are arranged on the sides, deviating from the road, of the guardrail plates, and the guardrail reinforcing ribs, the stand columns, the guardrail plates, the anti-blocking pieces and the guardrail connecting reinforcing plates are all made of high-strength stainless steel materials. The high-strength stainless steel road guardrail solves the problems that an existing road guardrail is not high in strength and corrosion resistance, unstable in structure and poor in buffering performance,cannot provide good protection for drivers and passengers of various vehicle types and is insufficient in safety protection performance.

A stable antirust primer is prepared from the following raw materials in parts by weight: 20-30 parts of a paint, 5-9 parts of antimony oxide, 4-8 parts of a zeolite powder, 4-6 parts of a film-forming auxiliary agent, 8-11 parts of ethylene glycol butyl ether, 5-9 parts of aluminum tripolyphosphate, 2-6 parts of nitro cellulose, 2-7 parts of a coupling agent, 3-5 parts of a levelling agent, 8-14 parts of polymethyl methacrylate acrylic resin, 2-4 parts of a pigment, 3-9 parts of butylated amino resin, 1-5 parts of a matting powder, and 3-6 parts of a dryer. The stable antirust primer has the beneficial effects that the stable antirust primer is stable in chemical properties, not easy to decompose, and good in use effect, besides, has quite good adhesiveness, and can be used for a long time.

The invention discloses a ventilation flue, and a preparation method and an application thereof. The ventilation flue utilizes magnesium sulfate heptahydrate as a raw material supplemented by inorganic and organic fillers, and comprises the following components in parts by weight: 45-70 parts of magnesium sulfate heptahydrate, 13-26 parts of calcium silicon powder, 11-19 parts of perlite, 3-12 parts of gypsum, 3-8 parts of fine stones, 4-15 parts of sawdust, 1-4 parts of phosphoric acid and 28-39 parts of water. The preparation method comprises the steps of slurry preparation, primary pouring, secondary pouring, mold removal and curing. The ventilation flue provided by the invention does not dissolve out free chloride ions after being soaked into water, and hydrate is stable and not prone to decompose, so that the ventilation flue is good in water resistance and are not subjected to a moisture absorption and active magnesia phenomenon; products are smooth and regular in surface, small in friction coefficient, low in wind resistance, free of deformation and crack, good in stability and excellent in mechanical properties and chemical properties.