116results about How to "Stable mechanical properties" patented technology

The invention discloses an aluminum alloy extrusion forming production process, which relates to the technical field of extrusion production, and comprises the following steps: designing an extrusion die, carrying out surface heat treatment on the extrusion die, selecting an aluminum alloy material, heating and extruding, carrying out surface treatment processing on a produced aluminum alloy profile, and packaging the aluminum alloy profile after the aluminum alloy profile is inspected to be qualified. Compared with the prior art, the method has the advantages that the grain structure of the profile can be more uniform and refined by accurately regulating and controlling the complex relation among parameters such as the extrusion temperature, the mold temperature, the extrusion speed and the lubricating condition, so that the mechanical property is enhanced, like a 6063 aluminum alloy profile, the tensile strength can be improved, the yield strength is improved, deformation or damage in the using process is effectively avoided, and meanwhile, the service life of the profile is prolonged. Good parameter matching can effectively reduce internal defects of the profile, metal can flow in a mold more smoothly, internal pores, cracks and other defects caused by non-uniform metal flow are reduced, and the surface quality is greatly improved.

The invention discloses a carbon ceramic composite conductive microsphere, a ceramic resistor and a preparation method, and belongs to the technical field of production of special materials of electrical equipment, and the method comprises the following steps: sequentially dipping porous mullite in a precursor solution of carbon and slurry containing carbon black, and carrying out drying treatment and carbon burying sintering to obtain the carbon ceramic composite conductive microsphere; the preparation method comprises the following steps: preparing a ceramic raw material, performing vacuum-assisted centrifugal impregnation on the ceramic raw material and slurry consisting of a binder in pug consisting of the ceramic raw material and a surfactant, sequentially performing drying and glue discharging treatment, primary isostatic pressing forming and air pressure sintering, cooling to room temperature, and performing mechanical treatment and electrode spraying to obtain the ceramic resistor. Impregnation improves the dispersibility and uniformity of the carbon material in the porous mullite to form a continuous conductive path, the carbon black-containing slurry improves the conductivity of the ceramic resistor, carbon-buried sintering generates in-situ carbon with abundant types, the combination of carbon and a ceramic interface is promoted, and the oxidation resistance, mechanical properties and electrical properties of the ceramic resistor are improved.

The invention discloses a continuous annealing process for TA4 cold-rolled titanium strip coils, which comprises the following steps: S1, surface degreasing: degreasing TA4 cold hard coils to remove oil stains on the surfaces; s2, continuous annealing of the material coil: introducing protective gas into a continuous annealing furnace, continuously heating to 520-650 DEG C, feeding the TA4 titanium strip coil into the furnace, carrying out continuous annealing, and carrying out titanium strip coil running by a rolling machine at a set running speed and tension; and S3, the material strip is cooled, specifically, the titanium strip is cooled in the cooling section of the continuous furnace, and a titanium strip coil is wound through a winding machine. The TA4 titanium strip coil manufactured through the technological process of surface degreasing, continuous annealing and cooling is stable in tensile strength, yield strength and ductility and meets the use standard.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method of a palladium catalyst for hydrogen peroxide production by an anthraquinone process, which comprises the following steps: at a certain temperature, alumina powder is impregnated in a palladium salt solution for equivalent-volume impregnation for a certain time, and alumina comprises gamma-Al2O3 and alpha-Al2O3; after impregnation is completed, deionized water is added into the solid, chloride ions are removed through electro-adsorption after ultrasonic treatment, and then a filter cake is obtained through filtering; according to the preparation method of the palladium catalyst, the aluminum oxide with the crystal phase in the specific proportion is matched with the ultrasonic treatment and the electro-adsorption method, the prepared catalyst has the advantages of being high in selectivity, good in catalytic activity and mechanical property and stable in product quality, chloride ions are easy to remove, and waste of a large number of water resources is avoided.

The invention discloses a paper folding type piezoelectric energy collector for collecting low-frequency energy. The paper folding type piezoelectric energy collector comprises a piezoelectric composite material paper folding cylindrical structure and two side end faces. The piezoelectric composite material origami cylindrical structure is obtained by bending and folding a planar piezoelectric composite material along a peak fold line and a valley fold line. In the bending process, the bent piezoelectric ceramic composite material can be manufactured by controlling external force in the sintering process. According to the invention, piezoelectric ceramic 3D printing is combined with a novel material inspired by paper folding. The piezoelectric ceramic suspension is used as 3D printing ink. The novel material structure is based on a Kresling origami cylindrical surface, but creases are hidden, the effective collection area is increased, and the electrical performance is improved. The multi-stable Kresling origami structure has low rigidity and a low energy barrier, so that energy collection in a low-frequency environment becomes possible, and the multi-stable Kresling origami structure is particularly suitable for ocean wave energy collection application.

The invention relates to the field of metal material casting, and discloses a production method of green sand as-cast high-plasticity nodular cast iron QT800-5, which comprises the following steps: preparing pig iron, waste steel and foundry returns, and using auxiliary materials such as a silicon carbide pretreating agent, a high-temperature graphitization carburant, a rare earth magnesium silicon iron nodulizing agent, a silicon barium nucleating agent and a silicon strontium nucleating agent to prepare the green sand as-cast high-plasticity nodular cast iron QT800-5. The purity and component stability of molten iron are ensured; in the smelting process, purification and adjustment are carried out through temperature control and segmented addition of auxiliary materials, then spheroidizing is carried out through a pouring method, and the microscopic structure of a casting is optimized through ladle-to-ladle inoculation and stream inoculation; the final casting has excellent mechanical properties including the tensile strength larger than or equal to 800 MPa, the yield strength larger than or equal to 480 MPa, the elongation larger than or equal to 5% and the matrix pearlite content larger than or equal to 80%. The production process disclosed by the invention is simplified, is suitable for large-scale industrial production, and has a wide application prospect in lightweight application requiring high-strength and high-plasticity materials.

The invention provides a cubic tin selenide-based thermoelectric crystal and a preparation method thereof, and relates to the technical field of crystal synthesis. The preparation method comprises the following steps: weighing tin, silver, antimony and selenium simple substances, putting into a first container, vacuumizing and sealing; raising the temperature of the first container to 953-1373K, and keeping the temperature for 15-30 hours; taking out the alloy ingot after cooling, putting the alloy ingot into a second container, vacuumizing and sealing; and heating the second container to 973-1373K, carrying out heat preservation for 5-30h, cooling the second container to 923-1173K at a first cooling rate, cooling the second container to 873-923K at a second cooling rate, and cooling the second container to room temperature at a third cooling rate. The blocky cubic tin selenide single crystal material is prepared, the extremely high grain orientation degree is achieved, and the high-performance thermoelectric material can be obtained.

The invention discloses steel with excellent surface quality for a power battery shell and a manufacturing method thereof. The steel for the power battery shell comprises the following chemical components in percentage by weight: 0.015%-0.025% of C, less than or equal to 0.030% of Si, 0.10%-0.20% of Mn, less than or equal to 0.01% and less than or equal to 0.02% of P, less than or equal to 0.012% of S, 0.03%-0.08% of Cr, 0.02%-0.05% of Alt, 0.002%-0.005% of B and the balance of Fe and inevitable impurities. The cold-rolled sheet for the low-carbon deep-drawing battery shell is produced mainly by accurately controlling components in steel and through the working procedures of hot rolling, layer cooling, acid rolling, annealing and leveling. According to the cold-rolled steel plate produced by the method, the yield strength is 190-260 MPa, the tensile strength is 320-390 MPa, the ductility is larger than or equal to 38%, the HR30T range is 45-50, and the cold-rolled steel plate has the high-speed stamping capacity, certain anti-pressure capacity and excellent surface quality.

The invention relates to the technical field of electric wires and cables, in particular to an outdoor high-temperature-resistant and corrosion-resistant photovoltaic cable and a preparation method thereof.The preparation method comprises the steps that a pretreated copper rod is fed into a wire drawing machine and gradually drawn into copper wires with the preset diameter through a multi-stage wire drawing die, and a stranding machine is adopted for stranding multiple strands of copper wires into a conductor according to the specific direction and pitch; carrying out preheating treatment on an insulating material, feeding the preheated insulating material into an insulating extruder, and uniformly extruding the insulating material on a conductor through a mold to form an insulating layer; covering the insulating layer with a shielding material by adopting a braiding machine, and cooling the insulated and shielded cable; feeding a sheath material into a sheath extruder, extruding the sheath material outside the shielding layer through a mold, feeding the extruded cable into a cooling water tank, and pulling the cable to pass through a shaping device; and the cooled and shaped cable is rolled, so that the produced photovoltaic cable has excellent corrosion resistance and can effectively resist corrosion of various corrosive substances in an outdoor environment.

The invention relates to a wire rod for a high-strength steel gas shielded welding wire and a production method. The wire rod comprises the following chemical components in percentage by weight: 0.060%-0.090% of C, 0.52%-0.65% of Si, 1.62%-1.73% of Mn, less than or equal to 0.014% of P, less than or equal to 0.009% of S and 0.060%-0.090% of Ti. The alloy comprises the following components in percentage by weight: 0.50-0.60% of Ni, 0.30-0.40% of Mo, less than or equal to 0.010% of Ca, less than or equal to 0.0060% of N and The method has the advantages that the steel wire rod for the gas shielded welding wire is produced through a converter, LF refining, small square billet continuous casting, heating furnace heating, controlled rolling and controlled cooling rolling and a heat preservation channel. The tensile strength of the wire rod is 743-789 MPa, the elongation is 22%-25.5%, and the requirements for the mechanical property, the drawing property and the welding seam quality of the wire rod are met.

The present invention belongs to the field of hot rolling process, and particularly relates to a control method and system for the iron scale on the surface of hot rolling strip, which is applied to the laminar cooling back-end cooling mode: before the strip enters the laminar cooling zone back-end, the corresponding strip surface iron scale control water cooling mode is selected to be turned on according to the properties of the rolled product itself; the strip is controlled to enter the air cooling section after the final rolling of the finishing mill according to the selected water cooling mode for the iron scale on the surface of the strip to control the iron scale on the surface of the strip; after the control is completed, the strip enters the laminar cooling zone back-end for laminar cooling until the strip reaches the target coiling temperature. The control method can reduce the thickness of the iron scale on the surface of the strip to less than 15μm, with a dense structure, and it is not easy to fall off in large pieces / sheets to form black ash, and at the same time, it also realizes the prefabrication of cracks in the iron scale layer on the surface of the strip to a certain extent, and improves the pickling efficiency by 15%-20%.

The invention relates to the technical field of fireproof glass, in particular to a nano composite material coating and a preparation method for applying the nano composite material coating to a surface film layer of an initial substrate for single-piece non-heat-insulation fireproof glass. The nano composite material coating is prepared from the following raw materials in parts by weight: 50-80 parts of nano composite oxide, 10-15 parts of a toughening material, 15-30 parts of molten glass and 1-5 parts of a fluxing agent; the preparation method comprises the following steps: S1, by taking a fluxing agent as a medium, mixing a nano composite oxide and a toughening material, grinding for 1-2 hours, adding a glass melt into the mixture, continuously grinding for 2-3 hours, heating to 180-220 DEG C, carrying out heat treatment, and removing the fluxing agent, so as to obtain a nano composite material; and S2, depositing on the surface of the glass substrate by adopting a physical vapor deposition method or a chemical vapor deposition method to form the nano composite material coating. According to the nano composite material coating prepared by the method, the toughness and the impact strength of the glass are improved, the fire-resistant integrity time of the glass is prolonged, and meanwhile, the light transmittance and the ultraviolet radiation resistance of the glass are better.

The invention discloses a method for preparing a high-performance closed-cell perlite material by a chemical method, the prepared high-performance closed-cell perlite material is mainly used in the field of buildings, and the method comprises the following steps: S1, expanding; s2, film covering; s3, dispersing; s4, grading; according to the invention, a layer of silica sol film is formed on the surface of the closed-cell perlite, the film layer not only significantly reduces the volume shrinkage of the closed-cell perlite in the subsequent slurry stirring process, but also effectively hinders the expansion of cracks in the perlite and greatly reduces the cracking risk, and meanwhile, the heat conductivity coefficient of the material is also reduced by film coating treatment, so that the thermal conductivity of the material is improved. The thermal insulation performance is obviously improved; according to the drying furnace, through cooperative use of the drying mechanism and the adjusting mechanism, the air outlet pipe can be driven to swing up and down in a reciprocating mode, so that the air blowing angle of the air outlet pipe is adjusted according to use requirements, hot air can be blown to different areas in the furnace body, the air blowing range is widened, and the perlite drying effect is improved.

The invention provides a self-cleaning ceramic membrane security filtration system. The self-cleaning ceramic membrane security filtration system comprises a ceramic membrane security filter; the ceramic membrane security filter comprises a bottom shell, a filter cavity and an upper cover; a plurality of internal pressure type ceramic membrane tubes are mounted between the bottom flow guide disc and the top flow guide disc; the water inlet pipe communicates to the bottom of the bottom shell; the water collecting tank is connected with the filter cavity through a connecting pipe; the elevation of the water inlet end of the water inlet pipe is higher than that of the top flow guide disc; the ceramic membrane security filtration system further comprises a siphon drainage pipe, the siphon drainage pipe comprises an inclined pipe section and a vertical pipe section, the inclined pipe section is communicated with the top of the upper cover, the vertical pipe section is communicated with the inclined pipe section, and the vertical pipe section extends downwards to the ground in the vertical direction; a siphon destroying hopper is mounted in the water collecting tank and is communicated with a connecting point of the inclined pipe section and the vertical pipe section through a siphon destroying pipe; and the maximum water level elevation of the water collecting tank is higher than that of the siphon breaking bucket. According to the invention, completely automatic filtration and self-cleaning of the internal pressure type ceramic membrane tube are realized.

The invention relates to the technical field of foamed silicone rubber and production and preparation processes, in particular to high-hardness foamed silicone rubber and a preparation method thereof.The high-hardness foamed silicone rubber is prepared from 1-20 parts of hydrogen-containing polysiloxane, 10-70 parts of hydroxyl-terminated polymethylvinylsiloxane, 1-30 parts of a mechanical reinforcing agent, 10-80 parts of a flame retardant and 0.05-0.3 part of a catalyst; the mechanical reinforcing agent is a mixture which simultaneously uses fumed silica, vinyl MQ silicon resin and surface-treated carbon nanotubes, so that the foamed silicone rubber has high hardness and does not increase the density, and meanwhile, by utilizing the shear thickening gel which is filled and adsorbed in the carbon nanotubes, when the foamed silicone rubber material is pressed, the foam silicone rubber material is not easy to deform. According to the present invention, the carbon nano-tube can rapidly harden, such that the originally soft carbon nano-tube can form the skeleton support on the foamed silicone rubber so as to improve the compressive strength and the permanent deformation property of the foamed silicone rubber, such that the foamed silicone rubber material with characteristics of good hardness, low density, excellent compressive strength and excellent resilience can be used for new energy battery support.

The invention discloses a non-degradable anti-protein adsorption material as well as a preparation method and application thereof in the field of anti-protein adsorption. The non-degradable anti-protein adsorption material is a block polymer taking a silane coupling agent as a crosslinking site or a material formed by crosslinking materials including the block polymer; the block polymer has non-degradability, a molecular chain comprises polyethylene glycol hydrophilic chain segments, hydrophobic chain segments introduced through hydrophobic monomers and cross-linking chain segments introduced through cross-linking monomers, and the polyethylene glycol hydrophilic chain segments are located between the hydrophobic chain segments. The hydrophobic chain segment is one or a combination of more of a methacrylate chain segment and an aryl-substituted polyolefin chain segment, and the crosslinking monomer is a silane coupling agent with a carbon-carbon double bond. The preparation method comprises the following steps: carrying out a controllable / active free radical polymerization reaction to obtain a block polymer; or after the block polymer is obtained according to the process, the non-degradable anti-protein adsorption material is further obtained through thermal crosslinking.

The application provides a multi-scale simulation method of a catalytic reaction process, comprising the following steps: (1) constructing a micro-element structure; (2) establishing a calculation model of a physical and chemical reaction system in the micro-element structure; (3) simulating and obtaining reaction kinetics parameters of the micro-element structure; (4) constructing a representative unit structure; (5) establishing a calculation model of a physical and chemical reaction system in the representative unit structure; (6) simulating and obtaining reaction kinetics parameters of the representative unit structure; (7) establishing and solving diffusion-reaction equations of a single catalyst particle; (8) establishing a reactor model and realizing real-time coupling calculation of reaction-diffusion-flow on the single catalyst particle; and (9) obtaining target performance parameters. The multi-scale simulation method accurately describes the internal structure of the catalyst and the space-time distribution of gas phase components in the catalyst and the space-time distribution of a flow field in a reactor bed layer, and effectively serves catalyst optimization design and reactor scale-up design.

The invention relates to the technical field of martensitic steel, in particular to a 04Cr13Ni5Mo stainless steel plate rolling and temperature control process, which comprises the following steps: heating a pretreated blank to 1190-1210 DEG C at a heating rate of more than 0 DEG C and less than or equal to 5 DEG C / min, and soaking for more than or equal to 2 hours; the rolling reduction rate of the blank is controlled to be 12%-15%, and compared with the reduction rate of the pass before final rolling, the reduction rate is reduced by 20%-25%; stacking slow cooling is larger than or equal to 550 DEG C, and the plate yield is increased by 30% or Through heat treatment processes of normalizing at 1040 DEG C + / -10 DEG C, preserving heat of a plate with the thickness of 85 mm for 4 hours, preserving heat of a plate with the thickness of 115 mm for 5 hours, tempering at 620 DEG C + / -10 DEG C, preserving heat of the plate with the thickness of 85 mm for 6 hours and preserving heat of the plate with the thickness of 115 mm for 8 hours, the yield ratio is stabilized at 0.8-0.85, and the uniformity of mechanical properties is improved by 25%. The stable yield ratio reduces the deformation amplitude of plates and workpieces by more than 40% during later processing, additional repair is not needed, and the production cost is reduced.

The invention is suitable for the technical field of materials, and discloses silica gel and a preparation method thereof, and a silica gel product and a preparation method thereof. Wherein the silica gel comprises a first component and a second component, the first component comprises a base material, a reinforcing agent, a modified filler, titanium dioxide and a vulcanizing agent, and the second component comprises a base material, a reinforcing agent, a modified filler, titanium dioxide, a cross-linking agent and a polymerization inhibitor. The silica gel provided by the invention not only has better mechanical properties, but also has a small friction coefficient, when the silica gel is in contact with skin, the adhesion feeling is low, the smooth effect is good, and the smooth feeling and the skin-friendly property are improved. Moreover, two components, namely the first component and the second component, are arranged, the first component and the second component are stored separately, the material is easy to store and stable in performance, the service life of the product can be prolonged, in addition, the material preparation and forming process is simple, the vulcanization time is short, and the production efficiency is greatly improved.

This invention provides a hydrophobic solvent and coating, comprising the following components by weight: perfluoronaphthalene: 93-94.5 wt%; methyl undecanoate: 5-5.3 wt%; perfluoropolyether trimethoxysilane: 0.2-0.8 wt%. This invention constructs a low surface energy layer on the substrate surface using perfluoropolyether trimethoxysilane, weakening the adhesion between water and the coating. During windshield wipes, no white fog is visible, solving the problem of residual white fog after wiping with traditional coatings. Simultaneously, the film-forming substance forms chemical bonds with the hydroxyl groups of the substrate, resulting in high adhesion and coating hardness, stable basic hydrophobicity and mechanical properties, meeting the needs of conventional applications.

The present application relates to the technical field of ceramic coating, especially to a micro-nano structure ceramic coating and its application on the reaction furnace of zircon sand boiling chlorination method, aiming at solving the problems of weak bonding force between the existing protective coating and the substrate, poor thermal shock resistance and easy failure in long-term high-temperature chlorine environment; the present application constructs a nano-wire reinforced micro-nano structure transition layer on the surface of porous corundum brick substrate in situ, and sequentially constructs a lanthanum phosphate bonding layer and a yttrium stabilized zirconium oxide barrier layer on the transition layer; the design utilizes the mechanical anchoring effect of micro-nano structure and the strong chemical bonding ability of lanthanum phosphate to realize the firm combination of the coating and the substrate; the dense characteristics of the zirconium oxide layer provide ultimate protection; the method significantly improves the overall anti-peeling ability and long-term corrosion resistance of the coating system.

The invention relates to the technical field of aluminum alloy preparation, in particular to a 7075 aluminum alloy sheet and a preparation method thereof. The preparation method comprises the following steps: A) melting raw materials with specific components, and preserving heat at 720-760 DEG C; (B) carrying out furnace bottom degassing refining on the obtained melt, and then filtering; c) carrying out grain refinement on the obtained melt by adopting a refiner; d) casting the obtained melt under specific casting parameters to obtain a cast ingot; the method comprises the following steps of (1) carrying out primary soaking treatment on a cast ingot, (2) carrying out secondary soaking treatment on the cast ingot, (3) carrying out secondary soaking treatment on the cast ingot, and (4) carrying out rolling deformation on the treated cast ingot to obtain the 7075 aluminum alloy sheet. The cast ingot prepared through the method is fine in grain and compound and more dispersed and uniform in tissue distribution, and the finally obtained 7075 aluminum alloy sheet is stable in mechanical property and small in fluctuation range.

The invention belongs to the technical field of metallurgy, and particularly relates to 590MPa-grade hot galvanizing dual-phase steel and a production method thereof, and the steel comprises the following chemical components in percentage by mass: 0.02%-0.06% of C, 0.01%-0.03% of Si, 0.90%-1.8% of Mn, less than or equal to 0.025% of P, less than or equal to 0.010% of S, 0.005%-0.010% of Al, 0.05%-0.30% of Cr, 0.05%-0.30% of Mo, less than or equal to 0.0060% of O, 0.010%-0.020% of N, and the balance of Fe and inevitable impurities. The method has the advantages that low carbon-silicon-aluminum and high nitrogen are cooperatively regulated and controlled in component design, and in the hot rolling process, premature precipitation of AlN particles in the hot rolling process is effectively inhibited by controlling the low coiling temperature, so that a large amount of nitrogen is reserved in a hot rolled plate in a solid solution state.

The present application relates to a kind of production methods of double-layer alloy composite seamless pipe.The outer layer material of double-layer alloy composite seamless pipe is low-carbon steel, the inner layer material is nickel-based alloy, outer layer alloy bar material is continuous casting billet or rolling blank, and inner layer alloy bar material is forging blank.The production steps are: (1) blank preparation; (2) upsetting; (3) blank machining; (4) hot expansion; (5) hot extrusion; (6) heat treatment; (7) surface treatment; (8) cold rolling; (9) finishing treatment.The blank preparation process includes: (1) theoretical calculation; (2) blanking; (3) electroplating; (4) blank assembly; (5) head and tail pad welding.The double-layer alloy composite seamless pipe produced by the present application has firm combination of the inner and outer layers of alloy, reduces the defects of extrusion delamination, the outer layer alloy has high strength, the inner layer alloy has good corrosion resistance, improves the yield rate of processing defects, and reduces material cost.

The invention provides a carbon fiber thermoplastic prepreg fabric laminated structure, a bending method and a box body, and relates to the technical field of box body forming. The laminated structure comprises a bottom intercalation alternate overlapping region, a middle interface transition reinforcing region and a top step transition region; the bottom intercalation alternate lap joint area comprises a plurality of layers of carbon fiber thermoplastic prepreg fabrics of which the edges are mutually lapped, and the lap joint areas of all the layers coincide in the thickness direction; the middle interface transition reinforcing area covers the lap joint area; the top step transition area comprises a plurality of layers of carbon fiber thermoplastic prepreg fabrics, wherein the edges of the carbon fiber thermoplastic prepreg fabrics are arranged at set distances, and cavity areas formed between the edges of all the layers coincide with the lap joint areas in the thickness direction. During bending, the middle interface transition reinforcing area is a neutral surface, the bottom intercalation alternate lap joint area generates tensile deformation, the lap joint structure generates interlayer slippage in the bending process, and deformation and cracking are prevented; the top step transition area generates compression deformation, and the cavity area is arranged in advance to prevent redundant materials from being extruded to generate wrinkles and interlayer separation.

The application provides a high and low temperature resistant modified PBS material, a preparation method and an application. The modified PBS comprises the following raw materials in parts by weight: succinic acid: 100 parts; 1,4-butanediol: 110-130 parts; norbornene dimethylol succinic acid prepolymer: 15-30 parts; polyethylene glycol: 5-15 parts; a catalyst: 0.05-0.2 parts; an antioxidant: 0.1-0.5 parts; wherein the number average molecular weight of the norbornene dimethylol succinic acid prepolymer is 1000-2000 g / mol; and the number average molecular weight of the polyethylene glycol is 500-2000 g / mol. By introducing rigid norbornene bicyclic structure and flexible polyethylene glycol segments through chemical bonding, the high and low temperature performance of the PBS is synergistically improved, the modified PBS material can maintain stable mechanical properties in the range of-20 DEG C to 130 DEG C, meanwhile, the modified PBS material has excellent biodegradability, compatibility and processing performance, and the preparation process is simple and controllable, and is suitable for industrial large-scale production.

The invention relates to the technical field of building curtain walls, in particular to a temperature control adjusting system and method for a breathing type curtain wall, and the system comprises an inner circulation module which is used for guiding indoor air into a cavity of the breathing type curtain wall and returning the indoor air after heat exchange; the outer circulation module is used for guiding outdoor air into the cavity of the breathing type curtain wall, carrying out heat exchange and then discharging the outdoor air; a data acquisition module; a data processing module; the control module is used for judging whether the temperature control of the room meets a preset standard or not according to the temperature control stability characterization value; and the optimization module is used for determining a temperature control optimization strategy when the temperature control of the breathing type curtain wall does not meet a preset standard according to the current deviation degree of the room with the abnormal temperature and secondarily determining the temperature control optimization strategy of the room with the abnormal temperature according to the indoor interference characterization value of the room with the abnormal temperature. The temperature control efficiency of the breathing type curtain wall is improved.

The invention relates to the technical field of wires and cables, and discloses an irradiation crosslinked polyethylene wire and cable which comprises a reinforcing layer and a splicing assembly, a plurality of cable bodies are installed in the reinforcing layer, an insulating layer is arranged outside the reinforcing layer, a waterproof layer is arranged outside the insulating layer, a shielding layer is arranged outside the waterproof layer, and the splicing assembly is arranged on the shielding layer. An outer protection layer is arranged outside the shielding layer; the plurality of cable bodies are installed in the reinforcing layer, structural support is provided for the cable, the tensile resistance and the extrusion resistance of the cable are enhanced, the mechanical performance stability of the cable in a complex environment is ensured, the cable is sequentially wrapped by the insulating layer, the waterproof layer, the shielding layer and the outer protective layer, the layers are clear in division of labor, and the service life of the cable is prolonged. The insulation, waterproof, anti-electromagnetic interference, external damage prevention and other performances of the cable are jointly guaranteed, and the comprehensive protection capability of the cable is improved.

The utility model discloses a high-temperature-resistant lining oil pumping pipe, which relates to the technical field of oil exploitation and comprises an oil pumping pipe body, a lining pipe is arranged inside the oil pumping pipe body, the outer side of the oil pumping pipe body is in threaded connection with a coupling main body, and a sealing ring is fixedly connected inside the coupling main body. One end of the sealing ring abuts against one end of the oil pumping pipe body and one end of the lining pipe, the oil pumping pipe body is made of alloy steel materials, and a heat insulation layer is arranged on the outer side of the oil pumping pipe body. According to the oil pumping pipe with the high-temperature-resistant lining, the oil pumping pipe body made of alloy steel materials containing high chromium and nickel elements is combined with the heat insulation layer wrapped by the outer-layer heat-resistant fiber materials and the polytetrafluoroethylene lining pipe to form a composite material structure. Not only are many defects of a traditional pipeline in the high-temperature and high-pressure environment effectively overcome, but also the efficiency and the safety of the whole system are improved, and the strict requirements of modern oil exploitation for equipment are met.

The invention provides a fully-assembled rural house steel-concrete composite structural body, and relates to the technical field of steel structures. The fully-assembled rural house steel-concrete combined structural body is formed by combining and assembling concrete floor slabs, steel columns and H-shaped steel beams, the concrete floor slabs are prefabricated and poured concrete structural members, the steel columns are prefabricated column steel members, steel column welding anchor bars are welded to one sides of the steel columns, and H-shaped steel beams are welded to the other sides of the steel columns. A steel beam welding anchor bar and a welding steel bar are welded to one side of the lower end of the H-shaped steel beam, a plurality of steel beam welding floor fixing screws are welded to an upper flange plate of the H-shaped steel beam, and a plurality of preformed holes are formed in the upper end of the concrete floor. By proposing a prefabrication assembly installation design concept, steel bar positioning and concrete shaping can be achieved at the same time, and installation is convenient and fast. And the device is suitable for factory batch manufacturing, low in component machining technical difficulty, high in production and machining efficiency and suitable for transportation and installation on rural narrow roads.