1486 results about "Autoclave" patented technology

The invention relates to the field of composite materials, and discloses an unmanned aerial vehicle carbon fiber shell preparation method, which comprises: carbon fiber surface modification treatment: carrying out surface cleaning, activation, chemical plating and surface functional modification on carbon fibers; preparing a resin matrix: mixing epoxy resin with a flexible toughening agent, a nano filler and a curing agent, and carrying out vacuum defoaming; carbon fiber laying: laying the modified carbon fiber cloth according to a set angle and sequence; vacuum bag forming: performing vacuum sealing on the laid carbon fiber composite material; and hot-pressing and curing: curing the composite material in an autoclave under the process conditions of set temperature, pressure and time. Through collaborative design of interface modification, matrix enhancement and process optimization, the comprehensive performance of the composite material is improved, so that the requirements of the unmanned aerial vehicle shell for high strength, fatigue resistance and impact resistance are met.

The invention provides a vacuum bag packaging method for composite material forming, and belongs to the technical field of aero-engine nacelle composite material autoclave forming. After the prepreg is laid, a layer of strippable cloth is laid on the prepreg; air-permeable felt strips fixed to the upper surface of the mold are arranged between the side edges of the prepreg and the air exhaust holes, air-permeable wool top felts are arranged on the two sides of the prepreg, the length direction of the air-permeable felt strips extends in the length direction of the prepreg, and the upper surfaces of the air-permeable felt strips and the side faces, back to the prepreg, of the air-permeable felt strips are covered with first adhesive demolding cloth; the upper surface of the mold is covered with a vacuum bag, the vacuum bag is covered with prepreg, breathable felt strips, strippable cloth and air exhaust holes, and the surface of the vacuum bag is connected with the upper surface of the mold in a sealed mode; and placing the mold in an autoclave for molding. By means of the treatment scheme, the maintenance cost of the mold air exhaust hole is reduced.

The invention discloses an autoclave control method and system, and relates to the technical field of autoclave control, the system comprises an information acquisition module, an information processing module, an intelligent analysis module and an adjustment control module; the information acquisition module is used for acquiring temperature information of heating points distributed at multiple points in the autoclave and storing the temperature information; processing the acquired temperature information in the autoclave through the information processing module, and analyzing to obtain the uniformity of a temperature field in the autoclave; a temperature field uniformity standard value is set through the intelligent analysis module, the temperature field uniformity obtained through real-time temperature analysis is compared with the temperature field uniformity standard value, and an adjustment instruction is generated according to a comparison result; the adjustment control module adjusts the power of the heater corresponding to the abnormal temperature according to the instruction to maintain the uniformity of the temperature field in the autoclave; the control system is used for coordinating and controlling the power of a plurality of heaters in the autoclave so as to maintain the temperature field uniformity in the autoclave.

The invention provides a 3D printing foaming part and a preparation method and application thereof, and belongs to the technical field of 3D printing. According to the method for 3D printing of the foaming part, polyamide powder serves as a raw material, the 3D printed part is prepared, then the 3D printed part is subjected to supercritical fluid kettle pressure foaming, and the 3D printed foaming part is obtained. By controlling the melting point and the average particle size of the polyamide powder, the printing temperature and the solubility of supercritical fluid in the 3D printing foaming part, the 3D printing foaming part with high rebound resilience, bending resistance and hydrolysis resistance is obtained, and the 3D printing foaming part has wide application prospects in the field of foaming shoe materials.

The invention discloses a CoFe-coated NBC composite catalyst and a preparation method and application thereof.The preparation method includes the steps that collected wheat straw is pretreated, wheat straw biomass powder is obtained after pretreatment is finished, the wheat straw biomass powder, Co (NO3) 2.6 H2O and Fe (NO3) 3.9 H2O are dissolved in water, isopropanol and ammonia water are added, the mixture is stirred to be uniform, then the solution is transferred into a high-pressure autoclave, and the CoFe-coated NBC composite catalyst is prepared through a hydrothermal method; a hydrothermal reaction is carried out, and a CoFe-coated NBC precursor is obtained after the hydrothermal reaction is finished; the CoFe-coated NBC precursor is placed in a tube furnace in the N2 atmosphere to be calcined, after calcination is finished, the material is cooled to the room temperature, then the material is taken out and ground, and the CoFe-coated NBC composite catalyst is obtained, the prepared CoFe-coated NBC composite catalyst has the high specific surface area, rich pore structures and a large number of active sites, and activation of PMS and degradation of pollutants are facilitated.

A system, method, and process for direct, precise measurement of extension / strain of a metallic round or flat tensile specimen or measurement of crack growth rates on a metallic CT specimen under control forces of extreme temperature, pressure and adverse environment are applied to a pre-crack metallic specimen within an autoclave.

The invention discloses a fuel rod cladding surface corrosion product deposition test device and method, and belongs to the field of nuclear power. The fuel rod cladding surface corrosion product deposition test device comprises a water supply section and a test section, the test section comprises a high-pressure kettle and a cladding pipe contained in the high-pressure kettle, and a heater is arranged in the cladding pipe to simulate heating of a fuel rod; the water supply section is used for providing circulating solution for the test section and comprises a coolant water tank, a dirt source water tank, a heating device, a pump set and a circulating pipeline, the coolant water tank circularly intervenes in the circulating pipeline to provide circulating simulated coolant, the dirt source water tank is used for injecting simulated dirt liquid into the circulating pipeline, the pump set is used for providing driving force, and the heater is used for heating. The device can accurately control the hydrochemical conditions of the dirt deposition test, keeps the consistency and repeatability of the test conditions in the test process, effectively improves the simulation test precision, and optimizes the test efficiency.

The invention discloses a device and method for forming a longitudinal and transverse stiffened wallboard based on an automatic fiber placement skin, and the method comprises the steps: firstly, preparing the automatic fiber placement skin, transferring a composite T-shaped stringer which is laid on a metal core mold in a net size and is subjected to hot pressing to a wallboard skin formed based on an automatic fiber placement process, a layer of high-temperature adhesive film is laid between the composite T-shaped stringer and the automatic fiber placement skin, the composite T-shaped stringer and the automatic fiber placement skin are fixedly held through positioning holes in a core mold, and high-temperature co-adhesive curing is carried out in an autoclave; and in addition, after a secondary part T-shaped stringer which is paved and cured out of the tank is subjected to trimming of redundant materials such as silt glue and burrs, the cured secondary dry-state ribs are positioned through a positioning clamping plate, a layer of high-temperature glue film is paved between the dry-state ribs and the automatic fiber placement skin, and then the T-shaped stringer enters the tank to be subjected to high-temperature secondary glue joint curing. By means of the metal core mold and the metal positioning clamping plate, the requirement for axis degree deviation of longitudinal and transverse ribs is effectively controlled, and high-quality forming is achieved.

A vertical high-temperature coating autoclave, comprising an autoclave body (1), a heat recovery device (2), a driving assembly (3), a supporting frame (4) and a stirring assembly (5), wherein the heat recovery device (2) is used for absorbing the heat from high-temperature flue generated by a reaction in the autoclave body (1), the absorbed heat is used for heating cold water, and a high-temperature and high-pressure gas-liquid mixture is used to complete cleaning of the kettle body (1) and self-cleaning of the stirring assembly (5) in combination with the rotation and vibration of the stirring assembly (3), so as to clean up high-melting-point residues and dust; a wall-scraping stirring device (51) is used for scraping the dust in a non-stirring area, and to shake the dust off in combination with vibration; a spiral mixing device (52) is used for uniform stirring to make small agglomerates break apart under impact and agitation, and driving finished products to rotate downward, so as to achieve rapid discharge and prevent a bottom discharge port from being blocked; a stirring and flushing device (53) is used for integrated stirring, autorotation stirring and raw-material upturning; and the inner wall of the autoclave body (1) is scraped by using a scraper rod (531), so as to prevent raw materials from sticking to the inner wall of the autoclave body (1).

The utility model provides a secondary glue joint forming die for an airplane composite material wallboard, and belongs to the technical field of composite material forming. Comprising a template assembly, a frame assembly, an in-bag clamping plate assembly, an out-bag clamping plate assembly, a T-shaped stringer forming die assembly and a trundle assembly. The frame assembly is used for supporting the whole mold. The formwork assembly is a wallboard skin forming assembly, and the in-bag clamping plate 3 and the out-bag clamping plate assembly 4 are positioned on the formwork assembly through positioning holes and used for positioning the position of the T-shaped stringer forming die assembly. According to the utility model, the accuracy of the appearance curvature of the skin and the accuracy of the position of the T-shaped stringer on the skin are ensured, the positioning method is simple and reliable, and when the autoclave is formed, the airflow flows uniformly, no local large temperature difference exists, and the wallboard forming quality is high.

The invention discloses a pipe service behavior evaluation device and a use method thereof. The pipe service behavior evaluation device comprises an autoclave, a fretting wear loading mechanism, a stress corrosion test mechanism, a fixing mechanism and a temperature and pressure control system. According to the pipe service behavior evaluation device, the test pipe is arranged in the high-pressure kettle, the temperature and pressure of water in the high-pressure kettle are controlled through the temperature and pressure control system, the test pipe can be tested in a high-temperature and high-pressure water environment, and micro-amplitude vibration is applied to the test pipe through the fretting wear loading mechanism; a stress corrosion load is applied to the test pipe through the stress corrosion test mechanism, so that the service behavior evaluation of the test pipe in a high-temperature and high-pressure water environment under the synergistic effect of fretting wear and stress corrosion can be realized.

The invention relates to a composite material hot-press forming manufacturing productivity evaluation method considering two-dimensional space constraint and workpiece family compatibility. The method comprises the following steps: step 1, acquiring workpiece information and autoclave information of composite material hot-press forming manufacturing; 2, analyzing two-dimensional spatial constraints of the workpiece and the autoclave; 3, analyzing the compatibility of the workpiece family; 4, according to the two-dimensional space constraint and the workpiece family compatibility constraint, grouping the workpieces by adopting a genetic algorithm, and distributing machining equipment; 5, batch workpieces are arranged into a tank, and a machining result is obtained; and step 6, analyzing a processing result, and carrying out productivity evaluation. According to the method, the characteristics of two-dimensional space constraint, workpiece family compatibility and the like are comprehensively considered, a production plan is reasonably arranged, the hot-press forming manufacturing capacity of the composite material is efficiently evaluated, and it is ensured that the enterprise capacity can meet the customer requirement.

The invention belongs to the technical field of rock mechanics and oil and gas development, and particularly relates to a deep shale rock mechanics and fracture evolution characteristic collaborative testing system and method.The system comprises a full-diameter triaxial autoclave, a hydraulic fracturing experiment mechanism, a high-temperature fracture experiment mechanism, a strain monitoring mechanism and an acoustic emission signal monitoring mechanism; the method comprises the following steps: carrying out a mechanical property test, a thermal cracking characteristic experiment and a hydraulic fracturing experiment on the same shale, analyzing a thermal cracking process and a hydraulic fracturing process, analyzing and speculating generation positions, generation time and complexity of thermal cracking cracks and hydraulic fracturing cracks of the shale, and the like. According to the invention, the real occurrence environment of the deep shale reservoir is simulated, the shale mechanical property test is carried out, the generation of high-temperature shale thermal cracking micro-cracks and the crack extension or development state in the hydraulic fracturing process are monitored, a crack evaluation method is provided, and data support is provided for improving the high-temperature thermal cracking and hydraulic fracturing effects of the deep shale.

A method of generating a cementitious powder comprising the steps of: - providing waste powder obtained from comminuting autoclave-cured waste material, which autoclave-cured waste material comprises a calcium silicate matrix, and - carbonating said waste powder.

The invention discloses a vacuum sealing method for high-temperature forming of a composite autoclave. The technical problem that a vacuum bag is prone to deformation at high temperature in the prior art is solved. The vacuum sealing method for high-temperature forming of the composite autoclave mainly comprises the steps of assembling of a forming mold, laying of prepreg, vacuum coating of the mold, curing of the autoclave and demolding. The vacuum bag used for wrapping the mold is made of aluminum foil or glass fiber reinforced aluminum foil. The plastic film has good ductility, electrical conductivity, thermal conductivity and shading performance, and can effectively block oxygen, moisture and peculiar smell. The problem of vacuum leakage in the curing process of polyimide and other high-temperature-resistant materials is effectively solved, and a reliable vacuum auxiliary material is provided for molding of products with high temperature resistance level and certain functionality. The method not only improves the forming quality of the composite material, but also reduces the production cost, and has remarkable economic benefits and social benefits.

The present invention relates to the field of carbon fiber material molding, and specifically to a carbon fiber material molding autoclave. The carbon fiber material molding autoclave includes a tank body, an oil tank, an oil tank heating mechanism and an air heating mechanism. The tank body is provided with a pressurizing channel for pressurizing the inside thereof, and is provided with an air temperature monitoring device for detecting the air temperature in the tank body; the oil tank is located in the tank body, is filled with oil, and is provided with an oil temperature monitoring device for detecting the oil temperature, the surface of the oil is covered with soft silicone for wrapping a workpiece, and the outer ring of the soft silicone is sealed and connected to the oil tank; the oil tank heating mechanism is installed in the oil tank, and is used to work according to the oil temperature monitored by the oil temperature monitoring device; the air heating mechanism is installed in the tank body, and is used to work according to the air temperature monitored by the air temperature monitoring device. The present invention can keep the temperature constant during the material molding process to improve the quality of the workpiece.

The invention discloses a preparation method and application for directly growing CuCoO2 on foamed nickel, and the preparation method comprises the following steps: dissolving copper nitrate, cobalt nitrate and a mineralizer in a solvent, intensely stirring to form a suspension A, then transferring the suspension A into a high-pressure kettle, and carrying out vacuum drying to obtain CuCoO2; meanwhile, the foamed nickel is placed in a polytetrafluoroethylene flower basket and then placed in an autoclave to be heated for a hydrothermal reaction, and after the hydrothermal reaction is finished, the foamed nickel is cooled to the room temperature. According to the method, the CuCoO2 electrode with the foamed nickel substrate can be prepared in one step, compared with a method for preparing CuCoO2 powder and then transferring the CuCoO2 powder to an electrode plate, the needed time is short, operation is easy, the electrode material is uniform, and the method can be widely applied to related fields as an efficient photoelectric functional material electrode preparation method.

The invention belongs to the technical field of telegraph pole manufacturing, and particularly relates to steam curing equipment for cement telegraph pole manufacturing and a steam curing method of the steam curing equipment. Comprising a steam curing tank used for steam curing of an injection molded telegraph pole; the outer shell is used for installing the supporting assembly and integrally moving; the rotating assembly is used for adjusting the rotating angle of the supporting assembly; the supporting assembly is used for placing a plurality of telegraph poles; the moving assembly is used for driving the air injection assembly to reciprocate; the air spraying assembly is used for spraying steam to maintain the telegraph pole; the ventilation assembly is used for feeding external steam into the air injection assembly; a first motor is matched with a first driving gear and an inner gear ring, a worker can conveniently adjust the angle of a mounting ring, then the position of each set of supporting plates is adjusted, reasonable placement of telegraph poles is facilitated, and the situation that due to the fact that a traditional steam-curing chamber lacks a structure for reasonably placing the telegraph poles, the telegraph poles cannot be placed easily when steam-curing is conducted on the telegraph poles is avoided. And the problem of disordered placement is solved.

The invention relates to a textured KCu7S4 thermoelectric material and a preparation method thereof, and the method comprises the steps: sequentially adding a prepared KOH aqueous solution, CuCl2. 2H2O and Na2S. 9H2O into a high-pressure kettle, and fully stirring for dissolving; dropwise adding an N2H4.H2O aqueous solution into the mixed solution, fully stirring, sealing, transferring to a microwave chemical synthesis instrument, heating, keeping stirring, and reacting at a target temperature and self-generated pressure to generate a KCu7S4 nanowire preferentially growing along a [001] crystal orientation; and after the reaction is finished and natural cooling is carried out, a product is collected through centrifugation, full cleaning and vacuum drying are carried out, and then the KCu7S4 thermoelectric material with [001] preferred orientation in the direction perpendicular to the pressure direction is obtained through spark plasma sintering. According to the method, a surfactant and an organic solvent are not used, and macro, rapid, efficient and controllable preparation of the KCu7S4 nanowire is realized through a low-temperature, low-cost and low-energy-consumption microwave-assisted hydrothermal process.

The invention provides a steel slag stability detection method based on full-particle-size-range steel slag aggregate concrete. The steel slag stability detection method comprises the following steps: step 1, preparing steel slag aggregate; step 2, preparing a concrete test piece and detecting compressive strength; 3, autoclaving treatment: carrying out autoclaving treatment on the steel slag-doped aggregate concrete test block by using an autoclave, and naturally cooling after the autoclaving treatment is finished; 4, comparing strength, and calculating the compressive strength change rate of the steel slag aggregate-doped concrete before and after autoclaving; and 5, evaluating the stability of the steel slag, namely evaluating the stability according to the compressive strength change rate in the step 4, if the compressive strength change rate of the steel slag aggregate-doped concrete before and after autoclaving is smaller than a rated ratio, determining that the stability of the steel slag is unqualified and cannot be used as an aggregate to prepare concrete, otherwise, determining that the steel slag is qualified. The method can quickly, effectively, accurately and reliably detect the stability of the steel slag aggregate as the concrete, and promotes the resource utilization of the steel slag as the concrete aggregate.

The invention discloses a two-dimensional metal oxide composite reduced graphene oxide burning rate catalyst, which is prepared by the following steps: uniformly grinding glucose, ammonium nitrate and transition metal nitrate, calcining at high temperature to generate a two-dimensional metal oxide nanosheet, mixing the two-dimensional metal oxide nanosheet with surfactant modified reduced graphene oxide powder, and sintering at high temperature to obtain the two-dimensional metal oxide composite reduced graphene oxide burning rate catalyst. And transferring into a high-pressure hydrothermal kettle for solvothermal reaction, so that the reduced graphene oxide and the two-dimensional metal oxide nanosheet are compounded to form the composite burning rate catalyst with a 2D-2D structure. Two two-dimensional materials are compounded through a solvothermal method, the defects of accumulation of reduced graphene oxide and aggregation of the two-dimensional metal oxide due to high surface energy are effectively avoided, meanwhile, the high conductivity of the reduced graphene oxide is utilized, the synergistic catalysis effect of the metal oxide and the carbon material is enhanced, and the performance of the composite material is improved. The composite material has a good catalytic effect on the thermal decomposition process of ammonium perchlorate.

The invention discloses a device and a method for preparing silicon nitride powder with high sintering activity by a self-propagating method. The method comprises the following steps: mixing silicon powder and silicon nitride powder to obtain a mixed raw material; putting a porous plate into a crucible, scattering magnesium powder on the porous plate, and stacking the mixed raw material on the magnesium powder; sealing and vacuumizing the crucible, then filling nitrogen, repeating the operation for a plurality of times, and keeping the nitrogen atmosphere and pressure in the crucible; igniting the magnesium powder in the crucible, and starting a self-propagating combustion reaction; and cooling the crucible to obtain the silicon nitride powder with high sintering activity. The device comprises an ignition system, a self-propagating autoclave and a temperature detection module, one end of the ignition system and one end of the temperature detection module extend into the self-propagating high-pressure kettle. According to the method and the device, a continuous ventilation low-pressure self-propagating method is adopted, sufficient nitrogen is ensured to participate in the reaction, the raw materials are completely reacted, the yield and the purity of the product are ensured, the alpha-phase content of the product is relatively high, and the self-propagating device is simple in structure and convenient to operate.

The invention discloses a preparation method of CoWO (cobalt tungsten oxide) modified NbOp-n heterojunction NbO5 / CoWO photocatalyst powder. The preparation method comprises the following steps: dissolving cobalt salt and tungsten salt in deionized water, stirring and mixing, carrying out hydrothermal reaction in an autoclave, washing and drying to obtain CoWO powder; the preparation method comprises the following steps: dissolving niobium oxalate and ammonium carbonate in deionized water, adding CoWO powder, carrying out a hydrothermal reaction in an autoclave, and carrying out washing and drying treatment to prepare NbO / CoWO photocatalyst powder. According to the method, the hydrothermal reaction temperature is regulated and controlled, and the mass ratio of raw materials is optimized, so that the catalyst forms a p-n heterojunction structure of NbOmicron flower loaded CoWOnano particles. The prepared catalyst has high norfloxacin wastewater degradation efficiency under visible light irradiation, has the advantages of simple preparation process, low reagent cost, high catalytic activity and good structural stability, and can be effectively applied to purification treatment of antibiotic polluted water.

The invention provides a beam structural part and a forming die and an integrated forming method thereof, the forming die comprises an auxiliary tool, a first core die and a second core die, and the first die and the second die are detachably installed on the auxiliary tool; the forming method comprises the following steps that the second core mold is installed on an auxiliary tool, multiple layers of prepregs are laid on the surface of the second core mold, the surface of the first core mold is sequentially coated with a rubber layer and demolding cloth, then multiple layers of prepregs are laid, then the first core mold is installed on the auxiliary tool, the auxiliary tool is fed into an autoclave for curing and demolding, and the beam structural part is obtained. According to the method, the parts of the multi-lattice beam structural part can be integrally formed, the manufacturing procedures are reduced, the overall strength of the beam structural part is improved, and therefore the market competitiveness of products is improved.

The invention discloses a method for preparing low-carbon cement based on construction wastes, which comprises the following steps: carrying out deep hydrothermal reaction on the construction wastes by using an autoclave under high-temperature and high-pressure conditions, so that silicon-aluminum minerals in the construction wastes are subjected to more thorough hydrothermal rearrangement to generate more stable hydrated silicate and aluminosilicate; the reaction activity of the clinker can be improved at the subsequent lower calcining temperature, so that the utilization rate and the high activity of complex components such as the building wastes in the cement preparation process are realized. The low-carbon cement disclosed by the invention is relatively high in later compressive strength and breaking strength, the strength grade of the low-carbon cement is 32.5, and the low-carbon cement meets building requirements and can be widely applied to the fields of buildings, roads and the like. According to the invention, closed cycle of solid waste-material is realized through waste recycling, and double innovation of material performance and ecological benefit is achieved.

The invention discloses a process method for directionally and controllably splicing large-size curved surface honeycombs. The process method comprises the steps of positioning and paving honeycombs, filling powdery polystyrene foam, placing pressurizing blocks, packaging and curing and the like. The curved surface honeycomb is positioned and laid on the inner concave forming face of the curved surface honeycomb forming tool; the filling amount of powdery polystyrene foam is calculated according to the foaming coefficient of 0.5-3, and the powdery polystyrene foam is filled to the splicing position of the two curved surface honeycombs; strippable cloth is integrally laid on the surface of the curved honeycomb, and then pressurizing blocks are placed close to the two sides of the splicing position; and finally packaging and feeding into an autoclave for heating and curing. The curved surface honeycombs filled with the powdery polystyrene foam are evenly spliced, the complete foaming degree is high, meanwhile, the determination of the foaming coefficient means that the polystyrene foam filling amount is quantified, and directional control over the splicing height and the splicing area of the curved surface honeycombs can be achieved. And the operation process is simple, the surface of the abutted seam after curing is smooth, and the forming quality is good. And the quantized filled polystyrene foam can avoid material waste, the part manufacturing cost is reduced, and important engineering application significance is achieved.

The invention provides a wide pH applicable multi-biomolecule detection MOF probe, a preparation method, a detection method and application, the probe is an MIL-53 (Fe) (at) AA (at) EZ probe, and comprises a metal organic framework MIL-53 (Fe), amino acid and enzyme; the preparation method comprises the following steps: weighing terephthalic acid and ferric chloride hexahydrate, adding into N, N-dimethylformamide, mixing and stirring, pouring the mixed solution into a stainless steel autoclave, heating and reacting, naturally cooling to room temperature, centrifugally separating a product, and washing with N, N-dimethylformamide and absolute ethyl alcohol to obtain the metal organic framework MIL-53 (Fe). The preparation method comprises the following steps: mixing a metal organic framework MIL-53 (Fe) with an amino acid solution, and carrying out ultrasonic treatment and stirring to obtain an MIL-53 (Fe) coated AA solution; the method comprises the following steps: dissolving enzyme in an MIL-53 (Fe) (at) AA solution, uniformly mixing, stirring, centrifugally separating a product, taking precipitate, and drying in vacuum to obtain the MIL-53 (Fe) (at) AA (at) EZ probe. The pH application range is wide, one-step detection can be achieved, and the method has the advantages of being rapid in reaction, high in sensitivity, low in detection limit and easy and convenient to operate.

The invention belongs to the technical field of concrete prefabricated parts, and relates to an autoclaved aerated concrete composite thermal insulation wallboard and a manufacturing process thereof. The autoclaved aerated concrete composite thermal insulation wallboard is of a three-layer composite structure and comprises autoclaved aerated concrete layers on the two sides and a phenolic aldehyde board arranged between the autoclaved aerated concrete layers on the two sides. The manufacturing process comprises the following steps: carrying out high-temperature steam curing on the phenolic aldehyde plate in advance through a still kettle, then obliquely inserting and fixing the phenolic aldehyde plate by using a reinforcing mesh (the area of the reinforcing mesh is larger than that of the phenolic aldehyde plate), sinking into a mold filled with slurry for pre-curing, cutting after the composite thermal insulation wallboard is preliminarily formed, punching two sides of the wallboard, and then putting into the still kettle for autoclaved curing, thereby obtaining the composite thermal insulation wallboard. According to the manufacturing process, the phenolic aldehyde board is effectively prevented from being separated from the autoclaved aerated concrete layer, cracks are effectively prevented from occurring at the edge intersection position of the autoclaved aerated concrete and the phenolic aldehyde board, the percent of pass of the wallboard is increased, the service life of the wallboard is prolonged, and the autoclaved aerated concrete composite wallboard has wide market prospects.

The invention discloses a rock permeability testing system in a high-temperature and high-pressure environment and a using method thereof, and belongs to the technical field of geothermal development or coal in-situ gasification mining. The test system is composed of a stress loading system, a test kettle assembly and a magnetic particle imaging system. When in use, the stress loading system and the test kettle assembly provide conditions such as high temperature, high pressure, seepage fluid and the like for a test piece; and detecting the spatial distribution state of the nano magnetic induction particles added in the seepage fluid through a magnetic particle imaging system to observe the pore and crack distribution characteristics in the test piece or detecting the nano magnetic induction particles added in the pollutant solution to observe the pollutant migration condition. The test system is scientific in design, simple in structure and easy to operate and maintain, can monitor pore fracture distribution and pollutant migration conditions in the test piece in real time under high-temperature and high-pressure conditions, provides accurate dynamic observation data, and provides important technical support for reservoir assessment and optimization in a complex environment.

The invention provides a nuclear fusion superconducting magnet autoclave VPI closed-loop heating system and method, and relates to the field of nuclear fusion magnet insulation manufacturing. A large-section spiral pipe coil is installed in a VPI mold, placed in an autoclave and connected with an internal heating system through a connector terminal; the non-inductive heating in the coil is realized by respectively electrifying the coil joint terminal and the winding intermediate joint in the reverse direction; the autoclave is respectively connected with the vacuumizing system, the pressurizing system, the heating system and the glue injection system; the temperature acquisition system is respectively connected with the internal heating system, the autoclave and a VPI mold related thermometer; the large-section spiral pipe coil serves as a heating wire to achieve internal heating of the winding and also serves as a thermometer to achieve collection of the internal temperature of the winding, and a temperature-resistance curve of a coil conductor serves as a temperature control reference of external heating to achieve accurate control over the temperature of the autoclave. According to the invention, internal non-inductive heating, accurate temperature measurement and external cooperative temperature control of the winding are realized.