29 results about "Composite pressure vessel" patented technology

The invention discloses a composite board ultrasonic defect detection method which comprises the following steps: S1, fixing a carbon fiber circumferential winding composite pressure container on a bracket, and establishing a coordinate system with the axis of the container as a z axis; s2, a 40 MHz dry coupling phased array ultrasonic probe is attached to the scanning starting point, and the contact angle of the probe is recorded; s3, moving the probe along the spiral track of the outer surface of the container at the speed of 20mm / s, and collecting A-scanning echo signals of all array elements; s4, performing pulse compression and time domain deconvolution processing on the acquired signal to obtain a time domain echo sequence; s5, delay time is calculated according to the shell curvature, the array element signals are compensated, and focusing B-scanning data are generated; s6, splicing the B-scanning data at the step length of 0.5 mm * 0.5 mm, and reconstructing C-scanning data corresponding to the space coordinates; and S7, inputting the C-scanning data into the trained Transform network, and outputting defect types, sizes and three-dimensional coordinates. The method realizes high-frequency ultrasonic composite board defect accurate detection, remarkably improves the microcrack recognition rate, and is widely applied to safety evaluation scenes of high-pressure hydrogen storage tanks and pressure vessels.

The invention provides a preparation method of a liner-free all-composite pressure vessel. The preparation method comprises the following steps: compounding polyvinyl alcohol, dimethyl sulfoxide and polyvinylpyrrolidone into a core mold adhesive according to a preset proportion; the preparation method comprises the following steps: grading a filler by adopting various glass beads with different mesh numbers and chopped glass fibers according to a specific proportion, and then blending with a core mold adhesive according to a specific proportion to prepare a sand core material; a sand core material is pressed into the pretreated core mold, the surface of the sand core material is scraped to be flat after the sand core material is tamped, and core mold adhesive is coated for mold closing; the closed core mold is placed in a curing oven for curing operation, after curing is completed, natural cooling is conducted, demolding is conducted, and a core mold is obtained; uniformly winding a layer of carbon fibers on the surface of the core mold, and dissolving the core mold in a normal-temperature water area after curing; and continuously winding the carbon fibers by using the carbon fiber body as rigidity attachment until the carbon fibers are completely wound to obtain the liner-free pressure vessel. According to the method, the mechanical behavior requirement of an original core mold is greatly reduced, the dead weight of the core mold can be effectively reduced, and good manufacturability is achieved.

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 invention relates to a composite material pressure vessel forming method which comprises the following steps: rigidly connecting a front joint and a rear joint to two ends of a positioning shaft to form a support frame body; the supporting frame body is vertically fixed, the 3D printer is driven to extrude fiber reinforced thermoplastic composite wires in the circumferential direction of the positioning shaft, and a printing layer is formed between the front connector and the rear connector; the supporting frame body with the printing layer is horizontally installed on a horizontal rotating support, a positioning shaft is driven to rotate, prepreg fibers are wound around the outer surface of the printing layer, and a fiber winding layer is formed; and after the front / rear skirt is mounted, curing to form an integral structure, and finally removing the horizontal rotating bracket and the positioning shaft. The printing layer is constructed through the 3D printing technology, then the prepreg fibers are wound on the outer surface of the printing layer, and the design precision, the forming efficiency and the bursting pressure of the container are guaranteed; and finally, the prepreg fibers are cured on the printing layer, the interfacial shear strength between the prepreg fibers and the printing layer is guaranteed, and demolding is not needed.

The invention discloses a combined internal reinforcing structure, and relates to the technical field of composite pressure vessels for petrochemical engineering, the combined internal reinforcing structure comprises a plurality of small-end reinforcing modules arranged at the small end of a conical shell, the small-end reinforcing modules are arranged in the shell along the axis direction of a small-end cylinder, and the small-end reinforcing modules are arranged in the shell along the axis direction of the small-end cylinder; the small-end reinforcing module comprises a small-end longitudinal base plate, a small-end longitudinal reinforcing beam and a small-end annular reinforcing rib, the small-end longitudinal base plate is arranged at the small end of the conical shell, the small-end longitudinal reinforcing beam is connected with the small-end longitudinal base plate through a small-end longitudinal connecting plate, and the small-end annular reinforcing rib is arranged on at least one side of the small-end longitudinal reinforcing beam; the small-end annular reinforcing ribs in the adjacent small-end reinforcing modules are connected in a threaded connection mode. The door-shaped support is arranged on the shell, and the door-shaped support is supported at the bottom of the small-end reinforcing module; the small end reinforcing structure is arranged at the small end of the conical shell, so that the strength problem of the conical shell can be effectively solved, and the manufacturing cost can be reduced.

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.

Systems and methods of this disclosure optimize the manufacturing of composite pressure vessels and structures by streamlining the fabrication of tooling and internal structures through use of additive manufacturing processes such as vat polymerization, material or binder jetting, material extrusion, and powder bed fusion to improve quality, scalability, extensibility, and cost effectiveness. In embodiments, a computer readable medium storing computer readable instructions which, when acted upon by a 3D printer, cause the 3D printer to print a mandrel (10) of a composite pressure vessel, the mandrel having a predetermined size, shape, and internal volume (10b) and including at least one end (13) having an opening (17) to the internal volume.

The invention relates to an all-composite material pressure vessel gas permeability prediction method which comprises the following steps: solving a gas permeability coefficient of a gas barrier film by adopting a gas barrier film permeability prediction model to obtain a first prediction value; solving a gas permeability coefficient of the carbon fiber layer by adopting a carbon fiber layer permeability prediction model to obtain a second predicted value; based on the first predicted value and the second predicted value, a heterogeneous laminated structure material gas permeability coefficient prediction model is adopted to solve the gas permeability coefficient of the all-composite material, and a third predicted value is obtained; establishing a prediction model for the permeability of the gas barrier film, namely, establishing corresponding prediction models under different conditions by considering the filler amount and filler orientation of gas barrier nanoparticles and the influence of crystallinity on the permeability; according to the carbon fiber layer permeability prediction model, the influence of the number of different carbon fiber unit layers on the permeability coefficient is considered. The accuracy of the prediction result is improved, and the engineering design precision is met.

The application discloses a method and system for generating, pattern matching and four-axis numerical control post-processing of fiber winding paths of unequal-pole hole composite material pressure containers, and belongs to the technical field of industrial software data processing. The method comprises the following steps: establishing an unequal-pole hole core mold model, independently setting a front-pole hole radius and a rear-pole hole radius; respectively establishing boundary conditions for front and rear heads, independently searching for a sliding coefficient and judging linear stability based on an arc length parameterized ordinary differential equation set and a shooting method; taking a pole hole turning radius and a residence angle as phase modulation parameters, jointly searching for N / k patterns and calculating a coverage rate; converting path points into four-axis winding machine coordinates considering the continuity of head slopes, safety gaps and C-axis postures; performing multi-axis speed planning and generating NC codes in combination with axis speeds, C-axis angular velocities and U-turn decelerations; and integrating path generation, pattern matching and post-processing in a same process and outputting NC programs. The application solves the problem that a single geodesic line is difficult to meet the constraint of different pole holes at two ends, and improves path convergence, pattern closeness and equipment motion adaptability.

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.

The invention is related to a method for preparing a composite pressure vessel (200) comprising the steps of providing a container (100) comprising a liner (101) having at least one open end, which liner encloses a solid material configured to function as a filtration system, a reactor system or a battery system (102); providing a radiation curable liquid resin comprising ethylenically unsaturated compounds; providing glass fiber material; impregnating the glass fiber material with the radiation curable liquid resin; winding the container with the impregnated glass fiber to form a non-cured pressure vessel; bringing the non-cured pressure vessel under exposure of a UV light source or an EB source that is able to cure the radiation curable resin to provide the composite pressure vessel enclosing the solid material.

A composite pressure vessel assembly includes a first and second vessels aligned side-by-side. Each vessel has a liner defining respective chambers. First and second mid-layers of the assembly cover the respective liners with portions of the respective mid-layers being in contact with one-another. An outer layer of the vessel assembly is in contact with and substantially envelops both mid-layers except for the mid-layer portions.

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.

The composite material pressure vessel rolling equipment comprises a multi-angle rolling assembly, the multi-angle rolling assembly comprises two supporting plates, each supporting plate is movably provided with a conical rotating disc, two multi-direction rolling frames are installed between the two conical rotating discs, and each multi-direction rolling frame is wound with a winding material; the end of the winding material is wound on the composite material pressure vessel body, a telescopic positioning clamp is horizontally installed on each conical rotating disc, and the conical rotating discs drive the two multidirectional winding frames to rotate in the same direction relative to the composite material pressure vessel body. The winding materials on the multi-direction winding frame can rapidly wrap the composite material pressure vessel body, efficient winding work can be achieved, the winding equipment can improve the production efficiency of the composite material pressure vessel body, and meanwhile the composite material pressure vessel body can be rapidly wound by adjusting the shape of the multi-direction winding frame. And composite material pressure vessel bodies with different specifications and sizes can be rolled.

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 invention is related to the production method of liquid / gas storage pressure vessels / tanks and wind turbine blades, including cryogenic, made of high-strength, polymer matrix, fiber-reinforced composite material with self-healing (repair) feature. The high-strength composite wall / shell, which is the main pressure / load-carrying element of the container / tank and wind turbine blades in our invention, repairs itself in case of any mechanical damage.

The present invention relates to a multi-layer composite pressure vessel with a constant temperature function, which has a constant temperature function and is intended to improve heat exchange efficiency and precise temperature control capabilities. The container includes two embedded tank bodies, a rotatable heat dissipation unit, a heating component and a power supply component. The first tank body is a central disc shape, which fixes the second tank body and is equipped with a stepped unit and a platform to ensure structural stability. The heat dissipation components evenly distributed on both sides adopt a wavy surface and a porous design to enhance the heat dissipation performance. The rotation is driven by a motor to achieve efficient heat exchange along the extension direction of the stepped unit. The power supply component is connected by wires to control the heating and heat dissipation units. The internal heating component adopts a semicircular arc design with an angle of at least 45 degrees. The entire system is intelligently managed to meet the temperature control requirements of the container under different working conditions and achieve efficient and stable constant temperature management.

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 present invention discloses a composite pressure vessel joint test tool and test method in the field of composite pressure vessel joint test technology. The tool includes a base plate, a support cylinder and a pressure-bearing cover plate. The support cylinder includes a first connection end and a support end. The first connection end is connected to the base plate. The support end is used to support the shoulder of the composite pressure vessel joint test piece and has a profile that matches the shoulder of the composite pressure vessel joint test piece. The pressure-bearing cover plate includes a second connection end and a pressure-bearing end. The second connection end is connected to the end face of the composite pressure vessel joint test piece. The pressure-bearing end is used to bear external pressure and transfer the pressure to the shoulder of the composite pressure vessel joint test piece through the second connection end and the end face of the composite pressure vessel joint test piece in sequence. The present invention can simulate the load conditions of the composite joint in the actual working process, and is used to test the composite joint separately, reducing research and development costs.

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.

The present application relates to the technical field of composite material forming process, and particularly relates to a composite pressure vessel with embedded metal parts and a preparation method and a forming die thereof. The preparation method comprises the following steps: making a forming die, preparing a prepreg, laying the prepreg to form a sealing reinforcing layer, vacuum bag heating and pressurizing curing, polishing the sealing reinforcing layer, preparing a rubber-embedded metal part-rubber composite layer, installing the rubber-embedded metal part-rubber composite layer, laying a skin and an end frame, demolding after pressurizing and curing to obtain the composite pressure vessel with embedded metal parts. The preparation method provided by the present application can realize the assembly of metal parts without machining openings on the composite pressure vessel, and can avoid the problems of poor process reliability and defects of interfacial debonding between the large-size embedded metal parts and the composite material due to the mismatch of thermal expansion coefficients after the curing of the composite material.