56 results about "Composite repairs" patented technology

The invention relates to the technical field of civil engineering material detection, and particularly discloses a performance detection method of self-repairing concrete for civil engineering, which comprises the following steps: acquiring micro-deformation field data of a crack area in real time in a crack induction process, and constructing a joint simulation model; predicting an initial contact state between a crack and a repair material based on the model, extracting interface pressure distribution and effective bonding area change information, and calculating an interface bonding failure risk characteristic value through an improved fuzzy C-means clustering algorithm; a periodic load is applied to a preset crack area, a closed response signal is collected, and a multi-scale crack expansion coupling degree characteristic value is constructed to quantify coordination between microscopic filling and macroscopic recovery; fusing the two feature values into a composite repair quality feature vector, inputting the composite repair quality feature vector into a recognition model based on an improved deep residual network, recognizing and repairing a blind area, and generating a spatial positioning tag map; and finally, dynamically adjusting the monitoring path and the loading frequency according to an identification result.

The invention provides self-repairing foam concrete and a preparation method thereof, and belongs to the technical field of concrete. The preparation method comprises the following steps: carrying out hydroxylation treatment on stone powder to obtain hydroxyl stone powder, modifying sodium alginate by using a silane coupling agent to obtain a grafted copolymer, compounding the hydroxyl stone powder, the grafted copolymer and nano silicon dioxide to obtain a composite carrier, and inoculating bacillus pasteurii onto the composite carrier; 300-400 parts by mass of cement, 100-150 parts by mass of the composite carrier inoculated with the bacillus pasteurii, 1 part by mass of a composite foaming agent and 10 parts by mass of urea are mixed according to the water-binder ratio of 0.35-0.45, and the self-repairing foam concrete is obtained. The self-repairing foam concrete is prepared by a one-step method through an innovative microbial carrier design and a composite repairing mechanism, and the problem that microbial inoculation and self-repairing foaming in composite concrete in the prior art need to be carried out step by step is solved.

The application discloses a kind of marine reinforced concrete crack fast self-repairing agent and preparation method thereof, the self-repairing agent includes the following components by mass fraction: polyacrylic acid hydrogel 20-30%, microorganism 5-10%, betaine 20-30%, calcium salt 15-25%, aluminum salt 20-30%.Its preparation method is: acrylic acid monomer is mixed with crosslinking agent, initiator, auxiliary crosslinking agent;Aluminum salt, acrylic acid are mixed to obtain aluminum acrylate;The two are mixed with microorganism and betaine, stirring and heating, and microorganism-polyacrylic acid hydrogel is prepared;After drying, it is broken, and calcium salt powder is wrapped, then immersed in polymer emulsion, dried, and prepared.The application can quickly block cracks by forming organic-inorganic composite repair products, solidify harmful media, release beneficial ions, achieve the dual goal of crack self-repairing and reinforcement corrosion inhibition.

The invention discloses an evaluation method, device and equipment for composite material repair consumables and a medium, and relates to the technical field of composite material structure maintenance. A series of controllable disturbance factors are introduced around reference process parameters to simulate actual fluctuation, and the system tests the performance of the repair consumables under non-ideal process conditions, so that the safety boundary of qualified products produced by the repair consumables is determined, and a more comprehensive and practical evaluation system is provided. A process window volume is introduced as an objective and comparable robustness quantitative index, and a process space boundary is efficiently predicted by means of a Gaussian process regression model, so that the problems of high cost and low efficiency of a traditional exhaustion test method are avoided. According to the method, the process robustness for determining the stability of the repair consumables in the actual maintenance environment is converted into the quantifiable and comparable equivalent curing process window and the measurement value thereof, scientific screening of the repair consumables is realized, and the quality risk in actual maintenance operation is remarkably reduced.

The application discloses a seven-layer gradient function composite repairing construction method for concrete freeze-thaw damage, and the method comprises the following steps: investigating a freeze-thaw damage area, determining damage depth and range, removing all loose, peeled and cracked concrete by using mechanical tools until the base surface is exposed, carrying out rust removal and corrosion prevention treatment on the exposed steel bars, cleaning the interface by using high-pressure water jet, removing dust and debris, and coating, in sequence, a primer, anti-freezing repair mortar, nano-enhanced coating, cement-based anti-freezing, waterproof and corrosion-proof protective coating, alkali-resistant sealing primer and protective coating on the base surface, wherein the protective coating is coated in two layers, the damaged base body is reconstructed in a gradient mode, the structural integrity is restored, a long-acting protection system with the functions of active protection and passive barrier is constructed from inside to outside and with gradient transition of material properties, and the service life of the repaired structure in an extreme environment is significantly prolonged.

A composite structure and methods are presented. A method of performing a composite repair is presented. A fiber mixture is forced through a composite structure and into a void of the composite structure, the fiber mixture comprising an adhesive and a plurality of electromagnetically steerable fibers. An electromagnetic field is applied to the fiber mixture within the void of the composite structure. The adhesive of the fiber mixture is cured to form the composite repair with structural capabilities.

This invention discloses a method for preparing a coal-based solid waste-based microbial composite remediation material, belonging to the technical field of soil remediation material preparation and high-value utilization of industrial solid waste. The method includes four core steps: low-damage pretreatment of coal-based solid waste, low-concentration alkali-ultrasound synergistic mild pre-activation, in-situ directional acclimatization-biological secondary activation integrated treatment, microenvironment enhancement, and low-temperature binder-free molding. This invention breaks the technical bias of existing technologies that involve "high-strength modification first, then passive loading of microorganisms," transforming the conflict between solid waste activation modification and microbial compatibility acclimatization into a synergistic process, fundamentally resolving the core technical contradiction between solid waste activation efficiency and microbial survival requirements. The material prepared by this invention possesses both excellent pollutant adsorption and passivation capabilities and long-term microbial activity, and can be widely applied in the field of heavy metal contaminated soil remediation, while simultaneously achieving the harmless and high-value utilization of coal-based solid waste.

The invention discloses a core-shell structure gradient layer sustained-release hydroxyapatite-PDRN / PN multiple compound as well as a preparation method and application thereof, and belongs to the technical field of biological materials. The preparation method comprises the following steps: S1, mixing a macromolecular solution with hydroxyapatite microspheres, and adjusting the pH value to be alkaline to obtain a suspension before in-situ mineralization; s2, mixing with calcium salt and phosphate, reacting, and carrying out solid-liquid separation to obtain an initial composite precipitate; s3, optionally, the initial composite precipitate is subjected to n times of coating circulation, and n is an integer ranging from 1 to 6; and S4, dispersing the initial composite precipitate or the final composite precipitate obtained after coating circulation in S3 into a solution containing PDRN or / and PN, so as to obtain a dispersion liquid of the core-shell structure gradient slow-release hydroxyapatite-PDRN / PN multiple compound. According to the method, the long-acting and stable hydroxyapatite-PDRN / PN multiple compound can be prepared, and the problems that in the prior art, a composite repairing material is not uniform in mixing, not matched in degradation behavior, short in biological activity maintaining time, low in cell utilization efficiency and the like are solved.

The application relates to a Fenton-like composite material, in particular to a self-activated Fenton-like composite repair material and a preparation method and application thereof, the composite repair material is CaO2@Fe3O4@BIP-BC, a protein imprinting biochar is used as a matrix, magnetite serving as an activator and calcium peroxide serving as a slow-release oxidant are sequentially loaded on the surface. Compared with the prior art, the application has the advantages that (1) the biochar surface active groups and calcium peroxide improve the high efficiency and long-acting property of the Fenton-like process, (2) the protein imprinting improves the selectivity of the removal of target harmful bacteria and harmful bacteria genes, (3) the biochar simultaneously loads the calcium peroxide and the magnetite, the simultaneous addition of the activator and the oxidant is realized, and the use cost and the operation complexity are reduced. The method solves the problems that the traditional Fenton-like oxidation treatment has poor specific removal effect on harmful bacteria and harmful bacteria genes in the environment, the treatment time is short, the required dosage is high, secondary pollution is serious, and the activator and the oxidant need to be used separately.

The present application relates to the technical field of remanufacturing, in particular to a beryllium bronze piston part inner wall damage repairing method, and its specific steps are as follows: S1, defect inspection; S2, electrode rod preparation; S3, electric spark coating repair; S4, cold welding machine remelting; S5, heat treatment; S6, inner hole honing; S7, repair verification; The present application adopts the method of electric spark coating repair + cold welding composite repair, which not only solves the problem of electric spark coating repair layer being not dense, but also solves the problem of difficult wire feeding in the cold welding inner hole repair process, and the specially-made electrode rod solves the problem of shaking of the long electrode rod rotating at high speed in the electric spark coating repair process, the metallographic of the repair layer does not have cracks and un-melted defects, the repair layer is metallurgically combined with the matrix, and the hardness of the repair layer reaches more than 90% of the matrix.

The application relates to a Fenton-like oxidation treatment method, in particular to application of a self-activation Fenton-like composite repair material, the composite repair material being CaO2@Fe3O4@BIP-BC, and taking protein imprinting biochar as a matrix, and magnetite and calcium peroxide being sequentially loaded on the surface. Compared with the prior art, the application has the advantages that 1) the biochar surface active groups and calcium peroxide improve the high efficiency and long-acting property of the Fenton-like, 2) the protein imprinting improves the selectivity of the target harmful bacteria and harmful bacteria gene removal, 3) the activation agent and the oxidant are simultaneously added, and the use cost and operation complexity are reduced. The method effectively solves the problems of the traditional Fenton-like oxidation treatment, such as poor specific removal effect on harmful bacteria and harmful bacteria genes, short treatment time, high required dosage, serious secondary pollution and the need of separate use of the activation agent and the oxidant, and realizes high efficiency and long-acting repair of soil and water bodies polluted by harmful bacteria and harmful bacteria genes through the Fenton-like reaction.

The invention provides a preparation method of an anti-freezing and anti-melting composite repair material suitable for a high and cold meadow degraded grass felt layer. The method comprises the following steps: preparing a seed protection layer from a bio-based fiber net, dolomite powder, polyvinyl alcohol and cold-resistant plant seeds; a response layer is prepared from nano silicon dioxide, phase change material microcapsules and polylactic resin; bentonite, biochar, zeolite, polyacrylamide and powdery silicon-calcium-potassium-magnesium fertilizer are prepared into a moisture regulation and control layer; humic acid, biochar, a sustained and controlled release compound fertilizer and symbiotic flora of a cold-resistant plant root system are prepared into a nutrient substrate layer; preparing an anchoring layer from modified starch, microcrystalline cellulose and a soil stabilizer; the anchoring layer, the nutrition matrix layer, the moisture regulation and control layer, the response layer and the seed protection layer are sequentially laid between the layers from bottom to top to be compounded, and the anti-freezing and anti-melting composite repair material suitable for the alpine meadow degraded grass felt layer is obtained. The invention further provides application of the composite repairing material, and the composite repairing material is used for the alpine meadow degraded grass felt layer to reduce freezing and thawing.

The invention belongs to the technical field of electric power facility maintenance, and particularly relates to a cement tower pole electrified composite repair method which comprises the following steps: S1, removing corrosion products on the surface of a tower pole to expose a fresh base surface; s2, mixing 42.5 R Portland cement, basalt macadam and water-borne epoxy resin emulsion to form a reinforcing agent; s3, the fresh base surface is filled with the reinforcing agent twice, and manual tamping is conducted after filling of the reinforcing agent is completed every time; s4, after the reinforcing agent is dried, the surface of the reinforcing agent is coated with a waterborne epoxy interface agent; and S5, after the waterborne epoxy interface agent is dried, waterborne epoxy resin is brushed on the surface of the waterborne epoxy interface agent for three times, and after the waterborne epoxy resin is brushed each time, glass wool cloth is wound on the surface of the filling layer. The outermost layer is coated with the water-borne epoxy resin, the hydrophobicity of the repaired surface can be greatly improved, water cannot permeate into the repaired surface, and then the environment erosion resistance is improved.

The application relates to a composite material repairing assembly and a composite material repairing method, wherein the composite material repairing assembly comprises: a pretreatment layer, which can be laid on a wind power blade and covers a to-be-repaired area; a pouring auxiliary material layer, which is arranged on one side of the pretreatment layer in a thickness direction of the composite material repairing assembly; a first vacuum layer, which is arranged on a side of the pouring auxiliary material layer away from the pretreatment layer, and covers the pouring auxiliary material layer; and a second vacuum layer, which is arranged on a side of the first vacuum layer away from the pretreatment layer, and has an area greater than that of the first vacuum layer. The composite material repairing assembly can improve repairing efficiency and convenience.

The invention belongs to the technical field of aero-engine repairing, and discloses an aero-engine blade repairing method which comprises the steps that a powder material used for repairing an aero-engine blade is deposited on a to-be-repaired part of a to-be-repaired blade through a laser-assisted cold spraying method, and a laser-assisted cold spraying deposition repairing layer is formed on the surface of the to-be-repaired part. And the laser-assisted cold spraying deposition repairing layer is machined to the original size precision and surface roughness of the blade to be repaired, then laser shock is adopted for enhancing treatment on the laser-assisted cold spraying deposition repairing layer, and repairing is completed. The powder material for repairing the aero-engine blade is micron titanium alloy powder. According to the invention, a composite repair process combining laser-assisted cold spraying and laser shock peening is creatively adopted, so that high-quality additive repair and fatigue performance enhancement of a damaged area are realized, and the safety and reliability of the blade in the subsequent service process are guaranteed.

The invention discloses a mold composite repair decision-making method and system based on laser thermal layer-by-layer interaction, and relates to the technical field of mold repair, and the method comprises the steps: carrying out the three-dimensional scanning of a damage region of a to-be-repaired mold, and recognizing the geometric features of a damage repair model; carrying out self-adaptive hierarchical planning on the damage repair area along the depth direction, and determining an initial layer thickness for each repair layer; optimized laser process parameters are generated for the current to-be-repaired layer; performing laser repair processing on the current layer, and monitoring thermal parameters and states in the processing process in real time; dynamically adjusting the layer thickness of a subsequent repair layer and laser process parameters; and circularly executing until all the repair layers are processed. The method has the advantages that the subsequent layer thickness and process parameters can be dynamically adjusted on line, so that the generation of defects such as thermal damage, deformation and cracks is remarkably inhibited, finally, the synchronous improvement of the mold repairing efficiency and the repairing quality is realized, and the good matching of the structure property of a repaired part and a matrix is ensured.

The invention relates to the technical field of aero-engine repairing, in particular to a composite repairing method for aero-engine guide vane ablation. The method comprises the following steps that an ablated area of the aero-engine guide vane is polished, then cobalt-based brazing filler metal is used for coating the polished ablated area, vacuum brazing is carried out at the vacuum degree of 4 * 10 <-2 > Pa or below, and the aero-engine guide vane in a brazing repair area is obtained; and arc ion plating is conducted on the brazing repair area of the aero-engine guide blade in the brazing repair area to increase a surface coating, and the aero-engine guide blade with the ablated area completely repaired is obtained. According to the method, the ablated area is completely repaired, and the completely repaired area can still work at the high temperature of 1100 DEG C.

The invention provides a rapid detection and repair method for a grounding system, which comprises the following steps: firstly, carrying out rapid online detection based on a multi-dimensional detection terminal, completing intelligent diagnosis through an intelligent diagnosis algorithm, and then completing long-acting repair by adopting a standardized reinforcement process; wherein the multi-dimensional detection terminal comprises an eddy current corrosion detector, a loop resistance tester and a GPS (Global Positioning System) positioning module; the intelligent diagnosis algorithm is used for constructing a fault diagnosis model and realizing fault type intelligent identification and a three-level early warning mechanism through probabilistic reasoning; the standardized reinforcement process comprises the steps of corrosion node repair, fracture node treatment and repeated laying repair. According to the invention, by integrating a multi-dimensional intelligent detection terminal, an intelligent diagnosis algorithm and a standardized composite repair process, a grounding system full-life-cycle management system suitable for a water-side high-corrosion environment is constructed, and integrated preventive maintenance from online detection, fault early warning to long-term repair is realized; the problems of detection lagging, low repairing efficiency and management missing in the traditional technology are solved.

The present invention provides a multi-part UV-curable coating composition comprising a first part (A) for providing a pigmented layer (A') and a second part (B) for providing a UV-resistant layer (B'). The multi- part UV-curable coating composition is particularly suitable for use in a composite repair process, such as for wind turbine repair. The present invention also relates to a multi-part repair system comprising the multi-part UV-curable coating composition and a UV-curable filler composition, and to methods of curing of, and to cured products made from, the multi-part UV-curable coating composition.

This invention belongs to the field of medical technology and discloses a rapid bone repair implant manufacturing method based on medical imaging and 3D printing. The method first involves CT scanning of the damaged bone area to obtain image files, then using Mimics software to reconstruct a 3D model. The model is imported into 3-Matics software for preprocessing, and a composite repair algorithm combining mirror symmetry and surface fitting is used to digitally repair the bone defect. The repair model is then converted to STL format and sliced, 3D printed using biocompatible materials, sterilized, and implanted into the patient. The innovations of this invention lie in the collaborative processing of Mimics and 3-Matics software, the composite repair algorithm combining mirror symmetry and surface fitting, and the end-to-end digital solution. This allows for personalized and precise customization of implants, reduces the risk of rejection, significantly improves repair accuracy and manufacturing efficiency, shortens the treatment cycle, reduces medical costs, and shows promising clinical application prospects.

The invention relates to the technical field of bridge structure health monitoring and intelligent maintenance, and particularly discloses a dynamic verification method and system for the overall service state of a stay cable. According to the method, verification is started through a three-level nested disturbance triggering mechanism, space-time-energy three-dimensional clustering is carried out on acoustic emission or micro-vibration signals collected by a sensor, and a progressive damage area is identified and confirmed; establishing a real-time confrontation model of the dynamic resistance and the environment equivalent osmotic pressure, executing two layers of safety criteria and issuing graded early warning; according to the early warning level, a composite repair or minimally invasive intervention scheme is automatically matched, iterative optimization is achieved through monitoring after repair, and whole-process intelligent management from perception, diagnosis, evaluation to repair is formed. And the operation and maintenance intelligence level of the stay cable and the full-life-cycle safety guarantee capability of the bridge are effectively improved.

The present application relates to a kind of preparation methods of new type composite repair mortar material of ceramic body, and its weight percentage composition is: industrial ash calcium powder 14-19%, glutinous rice syrup 14.3-18.6%, calcium carbonate powder 25-58%, calcium carbonate whisker 5-18%, sodium metasilicate pentahydrate 0.5-2.7%, white emulsion 0.2-1.6%, water 8-15.1%.Preparation glutinous rice syrup, preparation colloidal substance, repair defective site, natural solidification, polishing obtain product.According to the preparation method of new type repair mortar material of ceramic body;3 days volume shrinkage is less than 0.01%, surface strength 59.5-73HD, flexural strength 3.62-4.03MPa;Wet heat aging 28 days surface strength 67-75HD, flexural strength 4.35-5.7MPa.The present application realizes two major breakthroughs of zero shrinkage and reversibility by optimizing formula system, can effectively avoid the repair body to fall off and ensure that it can be safely removed, strictly follow the principle of cultural relics repair, provide innovative solution for the repair of ceramic complement.

The application discloses a kind of manufacturing equipment chip in-situ collection device and method, including additive-subtractive composite repair cabin, chip collection module and electrical control system;Additive-subtractive composite repair cabin includes sealed cabin and is arranged in sealed cabin blow chip module, cabin door opening and closing module and additive-subtractive repair module;Sealed cabin is equipped with eight corners, and each corner is provided with chip removal hole;Chip collection module includes chip collection mechanism and corner cover opening and closing mechanism, chip collection mechanism includes multiple chip collection boxes communicated by hose;In the position corresponding to each chip removal hole, there is a corner cover opening and closing mechanism for controlling chip removal hole opening and closing;Each chip removal hole and corresponding corner cover opening and closing mechanism are covered with a chip collection box outside;Electrical control system is installed on the top cover of sealed cabin, respectively with chip collection module, blow chip module, cabin door opening and closing module and additive-subtractive repair module connection.The application can be in any posture and position in-situ repair, and the generated chip is in-situ collected.

This invention relates to a composite repair method for bevel drive gears, belonging to the field of gear repair technology. This invention combines the structure of the bevel drive gear with continuous drive friction welding technology, using additive manufacturing through continuous drive friction welding to repair the gear. This solves the problems of difficult procurement and high cost of using bevel drive gears in auxiliary power units, achieving cost reduction and efficiency improvement.

The invention discloses a composite repairing device and method for a reinforced concrete rust expansion crack at the upper end of a structure. The device comprises a rigid composite groove body, a sealing assembly, a pressure injection system, a porous conductive anode layer, a direct-current power source and a pressure maintaining and releasing assembly. The groove body covers the crack from the lower portion to form an upward repairing cavity. During repairing, the device is sealed and fixed below a crack, upward hydraulic force is applied through a pressure injection system, electrophoresis repairing liquid is forced to permeate into the crack, meanwhile, a power supply is switched on, and under the synergistic effect of pressure and an electric field, the repairing liquid fully fills the crack and deposits on the surface of a steel bar to form a film; and after electrophoretic deposition repair, a high-performance composite adhesive material is poured into the tank body to form a permanent composite reinforcing system. The method can effectively overcome gravity, achieves accurate repair of top cracks, synchronously recovers structural durability and mechanical properties, and has the advantages of being good in repair effect and convenient to construct.

The invention relates to the field of laser additive manufacturing, and particularly discloses an ultrafast laser dynamic modulation milling-cladding integrated composite repair method, which comprises four sequentially connected process steps: ultrafast laser precision milling, laser mode millisecond switching, gradient cladding repair and heat-force cooperative regulation. According to the method, seamless connection of precise milling and cladding repairing of the damaged area is achieved in single equipment, and the problems of heat accumulation, poor interface bonding, low efficiency and the like in a traditional step-by-step technology are solved.

This invention discloses a method and apparatus for dry in-situ magnetically controlled repair of cavitation erosion on turbine blades. The method includes: after the turbine is shut down and the accumulated water is drained to create a dry environment, a repair actuator is inserted into the flow channel through a manhole in the volute and moved to the cavitation erosion area on the blade surface; geometric feature data of the cavitation erosion area is collected, and a thixotropic composite repair material containing magnetic particles is prepared; the composite repair material is injected into the cavitation erosion area according to the geometric feature data, and a controllable magnetic field is applied, using the magnetic force to drive the magnetic particles to migrate, thereby making the material dense and compacted and conforming to the blade profile; the compacted composite repair material is cured, and the repair actuator is withdrawn after reaching a preset strength. This invention enables unmanned in-situ repair of cavitation erosion areas on turbine blades, significantly shortening the maintenance cycle and reducing safety risks. The magnetic field compaction technology improves the density of the repair material and the bonding strength with the matrix, effectively ensuring the repair quality.

The application discloses cold and saline-alkali resistant anti-erosion concrete and a preparation method thereof. The concrete comprises, per cubic meter, 400-460 kg of cementing material, 620-680 kg of functional fine aggregate, 930-1020 kg of functional coarse aggregate, 125-145 kg of mixing water, 2-4% of crystalline / expansion type composite repair agent of the cementing material, 3-6% of high-activity mineral repair admixture of the cementing material, 0.6-1.2 kg of polyvinyl alcohol fiber as a reinforcing material, 0.8-1.5% of migration type organic rust inhibitor of the cementing material and 1.2-1.8% of anti-freezing polycarboxylic acid water reducing agent of the cementing material. The preparation method comprises multistage coating modification of the functional aggregate and a step-by-step dry-wet mixing process. Through the synergistic effect of multiple protection mechanisms, the application significantly improves the ability of the concrete to resist saline-alkali corrosion, freeze-thaw cycles and crack self-repairing, and has excellent durability and engineering practicability.

The invention discloses a three-layer artificial soft tissue composite repair membrane with progressive variable porosity and a preparation method and application of the three-layer artificial soft tissue composite repair membrane in the field of biomedical tissue engineering.The repair membrane is composed of three composite layers, and the first composite layer comprises a spiral disordered fiber layer and a first ordered fiber layer; the second composite layer comprises a spiral disordered fiber layer and a second ordered fiber layer, and the third composite layer is a middle disordered fiber layer. The middle disordered fiber layer is formed by stacking fibers which are spirally and disorderly arranged, and the ordered fiber layers on the two sides are formed by stacking fibers which are linearly arranged. And each layer of material is a biodegradable natural or synthetic polymer. The membrane can be loaded with active substances or subjected to surface modification. The preparation method adopts a thermal method and a near-field direct-writing printing process, and is realized by respectively printing each composite layer and then carrying out thermal bonding. The membrane is unique in structure, can effectively guide cell growth and promote tissue integration and regeneration, and is suitable for the field of tissue engineering scaffolds.