15 results about "Composite pressure vessel" patented technology

The preparation method of the high-temperature-creep-resistant nano-composite pressure vessel steel comprises the following steps that a lead sulfide precursor is dissolved in an organic solvent, and heating reaction is conducted under the inert gas condition to generate lead sulfide quantum dots; mixing quantum dots with amphiphilic molecules, and performing ultrasonic emulsification to form a quantum dot colloidal solution; mixing the quantum dot colloidal solution with supercritical carbon dioxide to form a homogeneous fluid phase; the steel matrix is placed in a high-pressure reaction kettle, the homogeneous fluid phase is introduced, permeation is conducted for 2-4 h under the conditions that the pressure is 10-15 MPa and the temperature is 50-70 DEG C, and a steel billet is obtained; the steel billet is placed in hot isostatic pressing equipment, heat preservation and pressure maintaining are conducted for 1-2 h in the inert gas environment under the conditions that the pressure ranges from 150 MPa to 200 MPa and the temperature ranges from 800 DEG C to 900 DEG C, and then the steel billet is cooled to the room temperature; semiconductor quantum dots are introduced into a metal matrix, atomic-scale interface strengthening is achieved through the quantum effect and the supercritical fluid permeation technology, and the steady-state creep rate of the material at the temperature of 600 DEG C can be reduced to 1 / 10 of that of a traditional process by combining the microcosmic strengthening advantage of the quantum dots and the macroscopic permeation advantage of supercritical fluid.

The application provides a composite pressure vessel fiber winding angle sensitivity analysis and optimization method, and belongs to the technical field of composite pressure vessel design and manufacturing. The method comprises the following steps: S1, model partitioning; S2, manufacturing constraint; S3, establishing a constitutive relation; S4, design variable parameterization; S5, mathematical expression of the optimization problem; S6, sensitivity analysis solution; S7, design variable updating; S8, iteration cycle and convergence determination. The method converts the design variables of the optimization problem from the unmanufacturable "local layer angle" to the actual "winding path parameters" that determine the fiber space angle, thereby strictly embedding the manufacturing constraint in the optimization process. Through the construction of a high-fidelity finite element model and the use of efficient analytical sensitivity analysis, efficient exploration of the design space is realized, and finally a winding angle distribution scheme that seamlessly connects with the numerical control winding equipment and can be directly used for multi-beam non-crossing production is output, thereby realizing the technical closed loop from optimization design to manufacturing planning.

The disclosed invention comprises one or more hybrid metal-composite pressure vessels e.g., 1 (FIG. 1) or 100,200 (FIG. 2), designed for deep water application of radiation sensitive equipment, where the hybrid pressure vessels comprise a combination of metals and non-metals. A source of radiation may be disposed in one of the two hybrid metal-composite pressure vessels and a radiation detector disposes in the other hybrid metal-composite pressure vessel. A radiation beam is less attenuated as it passes through the non-metal parts of the hybrid pressure vessels and the intensity of the radiation reaching a radiation detector is higher than if it were to pass through the metal parts of the housings.

The application provides a high-temperature gas composite pressure vessel with an equatorial threaded boss, which comprises a metal inner liner, an equatorial threaded boss arranged in the middle of the metal inner liner, a heat insulation coating arranged on the inner surface of the metal inner liner, a glue-filling and grinding layer arranged on the outer surface of the metal inner liner, a fiber composite layer wound on the outer surface of the glue-filling and grinding layer, a circumferential composite layer wound on the outer surface of the glue-filling and grinding layer around the root of the equatorial threaded boss, an equatorial threaded boss reinforcing layer adhered to the area around the root of the equatorial threaded boss, an inner liner composite layer wound on the outer surface of the metal inner liner, and an equatorial threaded boss S-shaped composite layer wound on the circumferential outer surface of the equatorial threaded boss. The fiber composite layer is wound to solve the weight reduction problem of the pressure vessel for high-temperature gas, solve the high-temperature resistance problem of the conventional composite pressure vessel, reduce the winding blind area of the equatorial connection lug part, and has the characteristics of light weight, high-temperature resistance, reliable equatorial boss winding and the like.

This invention provides a method for continuously and comprehensively predicting the thickness of fiber-wound pressure vessel heads. It acquires the fiber bundle distribution area of ​​the pressure vessel head and represents it as a planar surface region. The overlap of the fiber bundle distribution area is detected, and the number of fiber bundle layers is obtained comprehensively based on the distribution of fiber bundle layers. The surface region of the pressure vessel head is remapped to three-dimensional space, and the thickness at corresponding points is calculated using the layer values. This invention provides a continuous and comprehensive method for predicting the thickness of fiber-wound pressure vessel heads, taking into account the theoretically designed surface region covered by each cycle in the entire fiber winding process. By detecting the overlap between surface regions, the overall thickness distribution at the fiber-wound pressure vessel head is obtained, providing accurate thickness data for fiber-wound composite pressure vessels and improving the design optimization efficiency of fiber-wound composite pressure vessels.

The application provides a high-temperature gas composite pressure vessel with an equatorial boss and a manufacturing method thereof, and the composite pressure vessel comprises a heat insulation layer, a metal lining and a composite layer; the steps of the method mainly comprise: metal lining forming; metal lining weld seam grinding; heat insulation layer spraying; heat insulation layer curing; metal lining outer surface glue supplementing; annular composite layer winding; equatorial boss fiber cloth reinforcing winding; lining composite layer spiral winding; equatorial S-shaped fiber winding; composite layer surface treatment; and fiber curing. The application solves the problems that the existing high-temperature gas pressure vessel can only adopt a heavy full-metal structure scheme to realize equatorial boss connection and cannot realize light weight, and solves the matching problem of high-temperature resin and a titanium alloy lining, and provides a solution for the manufacturing method of the high-temperature gas composite pressure vessel with an equatorial boss.

In order to solve the problems that an NOL ring mold is complex to assemble and consumes time, the invention develops a low-cost disposable quick-release mold. The NOL ring is a furnace part which must be provided for delivery of workpieces such as a composite material pressure container and a barrel and is used for judging the process quality. In addition, the NOL ring is also a main part for screening a resin formula and researching a curing process and a winding process, and the demand quantity is large. A conventional NOL ring mold is a metal mold and is inconvenient to disassemble and assemble and low in efficiency. The disc-shaped glass sheet with the mounting shaft hole is used as the disposable sacrifice core mold and has the advantages of being rapid to assemble, convenient to disassemble, low in cost and high in efficiency, and due to the fact that the surface of the glass core mold is smooth, the apparent quality of the prepared NOL ring is superior to that of a metal mold.

This invention relates to a method and device for monitoring fiber optic implantation in composite material pressure-bearing equipment, belonging to the field of composite material structure monitoring and intelligent sensing technology. The method integrates distributed or point-type fiber optic sensors synchronously with the composite material through a designed winding process, enabling real-time monitoring of state parameters such as strain, temperature, and pressure in key areas of the equipment. Embedded guide rails and intelligent cable laying devices are used to ensure the stability and accuracy of the fiber optic cable during installation. A multi-layered structure design, including flexible fiber optic coating and elastic coupling layers, improves the fiber optic cable's durability and coupling efficiency. A temperature-stress collaborative monitoring system integrates FBG, Brillouin, and Raman sensing to achieve high-precision multi-physics sensing. This invention features high integration, low modification costs, and excellent monitoring performance, and is suitable for online health monitoring and intelligent early warning of composite material pressure-bearing equipment such as cryogenic high-pressure hydrogen storage cylinders, carbon fiber type V cylinders, and composite material pressure pipelines.

The manufacturing method of the all-composite pressure vessel comprises the following steps: S1, preparing a hollow glass sacrificial core mold; s2, spraying a strippable coating; s3, joint assembly and interface treatment; s4, forming the composite material layer; s5, curing is carried out; s6, performing resonance crushing to remove the core mold; and S7, glass fragments are cleaned. According to the sacrificial core mold, the glass raw material is adopted, the cost is extremely low, the broken glass slag is an inert inorganic matter, is easy to collect and can be recycled as a raw material, and cyclic utilization is achieved; the physical process of resonance crushing is rapid and can be completed in several minutes, and compared with the soluble core mold dissolving process consuming dozens of hours, the production efficiency is qualitatively improved; chemical inert solid disintegrating slag is formed after the glass sacrificial core mold is crushed and can be easily and thoroughly removed through pouring and high-pressure water washing, and the internal cleanliness of the product is extremely high.

The application discloses a composite pressure vessel automatic fiber placement trajectory planning method based on reinforcement learning, comprising the following steps: triangulating a geometric model of a composite pressure vessel and identifying high-curvature areas, locally refining the high-curvature areas, generating a high-precision triangular discrete model, calculating the geometric properties of each grid element and constructing a discrete map; constructing a reinforcement learning interactive environment based on the discrete map, integrating the minimum turning radius constraint of the automatic fiber placement process, updating the state on the triangular grid after the agent performs an action and calculating the path turning angle; designing an observation space, an action space and a multi-objective reward function, training the agent in the reinforcement learning interactive environment through a soft actor-critic algorithm, iteratively optimizing under the guidance of the multi-objective reward function, and learning an optimal trajectory planning strategy that minimizes wrinkle defects and controls fiber angle deviation. The application can improve the quality of the automatic fiber placement trajectory, and takes into account manufacturability and structural performance.

The invention discloses a forming method of a high-precision composite material pressure container. The method comprises the following steps that a prefabricated part close to the final contour of a product is provided, the prefabricated part is provided with a front-end flange and a rear-end flange, and an inner core mold of the prefabricated part is removed; self-designing and manufacturing a turning clamp and a milling clamp suitable for the composite material pressure container; the turning clamp and the prefabricated part are clamped to a numerical control lathe, the public reference axis of the prefabricated part is aligned, the machining allowance is confirmed, and turning is conducted; removing the turning clamp from the prefabricated part; and the milling clamp and the prefabricated part are clamped to a gantry machining center rotary table, the public reference axis of the prefabricated part is aligned, the reference of the coordinate system is confirmed, milling is conducted, and the composite material pressure container product is obtained. The forming method that demolding is conducted firstly and then machining is conducted is adopted, absolute stability of the product during machining is guaranteed through the self-designed clamp, and the size precision and form and location tolerance of the product are improved by the order of magnitude.

The application provides a core mold inner liner forming device and a V-shaped full-composite pressure container integrated forming process, and belongs to the technical field of hydrogen storage containers. The core mold inner liner forming device comprises a core mold inner liner mold and a core shaft. The inner cavity shape of the core mold inner liner mold is consistent with the inner cavity shape of a target pressure container, and the core mold inner liner mold comprises a barrel body segment module and dome segment modules arranged at both ends of the barrel body segment module. The core shaft penetrates through core shaft installation openings on both sides of the core mold inner liner mold. The modular precision mold is combined with step-by-step filling and compaction and a step curing process, realizes high-precision and high-strength integrated forming of the core mold inner liner, can accurately reproduce the inner cavity profile of the target pressure container and quickly demold. The dissolution and removal process of the water-soluble core mold inner liner is mild and efficient, and will not cause damage to the composite material layer of the inner cavity of the container, improves the forming efficiency and quality, and is suitable for manufacturing V-shaped full-composite pressure containers of various specifications and structures.

The invention provides a composite material pressure vessel fiber winding angle sensitivity analysis and optimization method, and belongs to the technical field of composite material pressure vessel design and manufacture, the method comprises the following steps: S1, model partitioning; s2, manufacturing constraints; s3, establishing a constitutive relationship; s4, designing variable parameterization; s5, mathematically expressing the optimization problem; s6, analyzing and solving the sensitivity; s7, updating the design variables; and S8, performing iterative loop and convergence judgment. According to the method, a design variable of an optimization problem is converted into an actual winding path parameter for determining a fiber space angle from a non-manufacturable local ply angle, so that manufacturing constraints are strictly embedded in the optimization process, efficient exploration of a design space is realized by constructing a high-fidelity finite element model and adopting efficient analysis sensitivity analysis, and the method has the advantages of being simple in structure and high in practicability. And finally, a winding angle distribution scheme which is seamlessly connected with numerical control winding equipment and can be directly used for multi-beam non-cross production is output, and a technical closed loop from optimization design to manufacturing planning is realized.

This invention relates to a method for molding a composite pressure vessel. A front and rear connector are rigidly connected to both ends of a positioning shaft to form a support frame. The support frame is vertically fixed, and a 3D printer is driven to extrude fiber-reinforced thermoplastic composite filaments circumferentially along the positioning shaft, forming a printed layer between the front and rear connectors. The support frame with the printed layer is horizontally installed onto a horizontal rotating support, and the positioning shaft is driven to rotate and wrap pre-impregnated fibers around the outer surface of the printed layer, forming a fiber-wound layer. After installing the front and rear skirts, the process is cured to form an integral structure. Finally, the horizontal rotating support and positioning shaft are removed. This invention first utilizes 3D printing technology to construct the printed layer, then wraps pre-impregnated fibers around the outer surface of the printed layer, ensuring the design accuracy, molding efficiency, and burst pressure of the vessel. Finally, the pre-impregnated fibers are cured on the printed layer, ensuring the interfacial shear strength between the two, and eliminating the need for demolding.