40results about How to "Meet the needs of different projects" patented technology

The invention relates to a high-temperature-insulating material and a preparation method therefor and particularly relates to the high-temperature-insulating material, which has a nano porous structure, prepared through forming an aqueous-phase uniform three-dimensional-network nano porous structure by taking thixotropic colloid as a template agent and adding a binding agent, aggregates, powder materials, an opacifier and admixtures. The preparation method for the high-temperature-insulating material, disclosed by the invention, is simple and easy in operation, low in production cost and environment-friendly and safe in process, does not need high-pressure special equipment, is free of combustible and explosive or other harmful substances and is beneficial to mass production. The high-temperature-insulating material disclosed by the invention has the characteristics of light weight, high strength and low coefficient of thermal conductivity, can be used for preparing high-temperature-insulating bricks, heat-insulating plates, special-shaped pieces and coating materials and can be applied to the heat insulating protection of equipment such as high-temperature furnace hearths, pipelines and valves in the fields of aerospace and military industries, metallurgical forging, petroleum refining, electric power and the like, so that the safety of use and the level of energy saving and consumption lowering are improved.

The invention relates to porous concrete and a preparation method thereof, in particular to novel nano porous concrete which is prepared by taking thixotropic colloid as a template agent to form a uniform-water-phase three-dimensional network nano porous structure and adding cementing materials, fine aggregate, coarse aggregate, an admixture and an additive. The nano porous concrete has the characteristics of being light, high in strength and low in heat conductivity, can be prefabricated into bricks, building blocks, plates, and assembly type stairs, wallboards, balcony slabs and roof panel parts in a factory, can be also cast on a construction site, and further can be prepared into mortar, thereby having remarkable practical significance on promotion of development of housing industrialization and green building concrete material in our country.

The invention relates to a preparation method of a root-like carbon nanotube grafting carbon fiber reinforcement, relating to the preparation method of a carbon fiber reinforcement. The invention solves the problems that the traditional method has long process time and toxic procedures and prepares a root-like reinforced material which is mechanically engaged with a resin substrate and has poor interface adhesive performance. The method comprises the following steps: (1) processing a carbon nanotube with acid; and (2) putting carboxyl-modified carbon nanotube and dendritic macromolecule-modified carbon fiber into a solvent; then, reacting for 12-24h; filtering; and washing and drying the filtered carbon fiber to obtain the root-like carbon nanotube grafting carbon fiber reinforcement. The obtained root-like carbon nanotube grafting carbon fiber reinforcement not only can form a mechanical engagement action with epoxide resin, but also enables a great amount of active functional groups on the surface to form chemical keys with open epoxy groups in the epoxide resin, improves the interface shearing strength of carbon fiber/epoxide resin composite material by 170-250% and improves the impact toughness of the epoxide resin by 60-85%.

The invention discloses a method for preparing graphene sponge based on traditional sponge serving as a template, relates to the method for preparing the graphene sponge, and mainly solves the problem that the size of the conventional graphene sponge product is limited by equipment. The method comprises the following steps: first, preparing graphene oxide; second, reducing the graphene oxide; third, preparing graphene dispersion liquid; fourth, preparing the graphene sponge by an electrophoresis method; fifth, performing drying treatment to obtain a graphene sponge material based on the traditional sponge serving as the template. By the method, a large-size sample can be prepared; the method can be widely applied to industrial production. The method is used for preparing the graphene sponge based on the traditional sponge serving as the template.

The invention provides a method for modifying carbon fibers by dendritic macromoleculars, relating to a method for modifying the carbon fibers and aiming at solving the problem of poor stability due to that only one functional group of organic silicon compound can react with the fiber modified surface so as to limit a membrane in a bidimensional surface. The method comprises the following steps: adding carbon fibers in a strong oxidizing acid, utilizing ultrasonic for processing, heating and refluxing, drying, adding into dendritic macromolecular solution for ultrasonic processing once again, reacting under the temperature of 20-100 DEG C, washing and drying to obtain the carbon fibers modified by the dendritic macromoleculars. The dendritic macromoleculars used in the invention have the advantages of tri-dimensional structure, evenly-distributed and thick outer functional groups, lower viscosity, unique flowing deformation property, good film forming property and favorable modified effect. The epoxy resin composite material prepared by using the carbon fibers modified by the dendritic macromoleculars obtained in the invention has 53.2-55.8MPa of interface shearing strength.

The invention relates to a graphene/copper nano wire composite film and a preparation method thereof, and aims at solving the problem in molding of the graphene/copper nano wire composite film. The method comprises that a copper nano wire dispersion liquid is prepared; a graphene dispersion liquid is prepared; the copper nano wire dispersion liquid is mixed with the graphene dispersion liquid; a composite film is prepared in electro-static spray sedimentation method; and the graphene/copper nano wire composite film is obtained by hot pressing and sintering. According to the invention, large-size samples in which graphene is dispersed uniformly can be prepared, the composite film is easy to disengage from a substrate in the preparation process, and the film and method can be widely applied to industrial production.

The invention provides a quantum searcher searching mechanism-based circular ring array directional diagram comprehensive method. The comprehensive method is realized by the steps of establishing a circular ring array model; performing initialization of a quantum searcher group; calculating the position of the quantum searcher and a fitness value of the quantum position; updating the searching step size and searching direction of the quantum searcher searching mechanism; updating the quantum position according to an evolution rule; calculating a fitness value in a new position of the quantum searcher, determining the individual historical optimal quantum position, and determining the global optimal quantum position; if the maximum number of iterations is reached, outputting the global optimal quantum position; and mapping the global optimal quantum position into a circular ring array parameter, and introducing a directional diagram function to obtain a corresponding normalized directional diagram. By combination with advantages of quantum calculation and the searcher searching mechanism, the method has the advantages of high searching speed and strong global searching capability.

The invention discloses an assembly concrete prefabricated wallboard material using ettringite as a template agent and particularly relates to a three-dimensional network cellular structure using the ettringite colloid as the template agent and uniform in water phase. By adding a colloidal gel material, a fine aggregate, a coarse aggregate, an admixture and an additive, novel concrete having a uniform cellular structure and meanwhile having bearing capability and a heat preservation function is prepared. The assembly concrete prefabricated wallboard material has the advantages of light weight, high strength and low heat conductivity coefficients, can be prefabricated into bricks, building blocks and boards and parts such as assembled stairs, wall boards, floor slabs, balcony boards and roof boards, can be also cast on a construction site, is compatible with an existing aerated concrete production process, a foaming concrete production process and a common concrete prefabricating production process, is conductive to transformation and upgrading of traditional concrete industry and has the remarkable practical significance on domestic housing industrialization and development of green building concrete materials.

The invention discloses a heat-source-free slow-release polycarboxylic acid high-performance water reducing agent, which comprises: 100 parts of isopentenyl polyoxyethylene ether, 6-10 parts of acrylic acid, 9-13 parts of hydroxyethyl acrylate, 5-9 parts of hydroxypropyl acrylate, 1-2 parts of 2-acrylamide-2-methyl propanesulfonic acid, 1-2 parts of sodium methylallyl sulfonate, 0.5-1.5 parts of sodium phosphite, 0.5-1 part of ammonium persulfate, 1-2 parts hydrogen peroxide, and 140-180 parts of water. The invention further discloses a preparation method of the heat-source-free slow-release polycarboxylic acid high-performance water reducing agent. According to the present invention, the preparation method has characteristics of simple production process and low cost, the obtained producthas advantages of high initial water reduction rate and significant sustained release effect, can maintain concrete at a loss-free state for 1-3 h, can effectively solve the problem of rapid slump loss of concrete, and can save the energy consumption.

The invention provides a multi-mode combined Beidou deformation monitoring data processing system and method. The system mainly comprises a data management module, a data processing module, a prediction analysis module and an early warning module, wherein the data processing module comprises a centimeter precision real-time resolving sub-module and a millimeter high-precision delay resolving sub-module. According to the method, the resolving modules with two precisions are used for resolving at the same time, the two resolving modules have a relation, the baseline length constraint informationcan be provided for the delay resolving through the real-time resolving, and the ambiguity fixing rate of a multi-baseline resolving module is increased; the deformation information can be checked and judged according to a deformation point ID provided by the real-time solution through the delay solution, so that the stability of a real-time result is improved, and part of gross error values areeliminated. On one hand, the delay solution can provide a high-precision solution result, on the other hand, a solution mode can be adjusted according to the real-time result, so that the timeliness of the delay result is improved, and the delay solution and the real-time solution supplement each other to improve the monitoring precision and timeliness.

The invention provides a spray-drying and hot-press vulcanization combination-based method for preparing a graphene/rubber composite material, and belongs to the technical field of graphene/rubber composite materials, aiming at solving the problems that an existing graphene/rubber composite material cannot use raw graphene without environment stress as filler and cannot be uniformly dispersed into nonpolar rubber by a simple process flow. The method comprises the following steps: 1, preparing a graphene dispersion liquid; 2, preparing graphene-rubber emulsion; 3, preparing graphene/rubber composite material powder by a spray-drying method; and 4, performing hot-press vulcanization with a flat plate to prepare the graphene/rubber composite material. The method can be widely applied to industrial production since pollution-free raw graphene is utilized as the raw material and can be uniformly dispersed into a non-polar rubber substrate.

The invention discloses a combined adjustable linear shaped charge device. The combined adjustable linear shaped charge device comprises a linear tube groove and shaped charge liners. The linear tube groove is a combined adjustable liner tube groove and comprises at least one cartridge bag tube groove set comprising two cartridge bag tube grooves, and the two cartridge bag tube grooves or the at least two cartridge bag tube groove sets are connected through a chaining tube with the shaped direction angle to form the adjustable double-pole or multiple-pole liner tube groove; each cartridge bag tube groove is internally provided with a containing space containing explosive, wherein a reserved half hole used for placing an initiating and detonating cord is formed in the inner end of each cartridge bag tube groove, one shaped charge liner is arranged at the outer end opposite to the reserved half hole and is connected with the cartridge bag tube groove in a clamped mode. The linear tube groove in the combined adjustable linear shaped charge device is a general tube groove and can be matched with different shaped charge liners, different chaining pipes and different positioning devices; the combined adjustable linear shaped charge device is high in generality, convenient to operate, wide in application range and good in explosion effect, the shaped direction angle is adjustable, the overexcavation amount is small, side slopes are flat, and boundary profile curves are smooth.

The invention provides a stable support device of a vertical shaft heading machine. A fixed center ring is arranged above a cutter head of the heading machine, multiple telescopic devices are annularly arranged on the fixed center ring, the adjacent telescopic devices are connected through connecting devices, and supporting devices are arranged on the telescopic devices. The stable support deviceis compact in structural design, the stability of a stratum during heading of the heading machine is guaranteed greatly, influences of equipment vibration on the stratum are reduced, the safety is improved and the service life of equipment is prolonged during heading of the heading machine, meanwhile, equipment reactive torque is provided to prevent the equipment from rotating under cutting torque, and the stable support device can further temporarily support an unstable stratum and earns time for adoption of other auxiliary construction procedures.

The invention discloses an assembly type flexible damping spiral anchor foundation and a power transmission tower and belongs to the technical field of power transmission line engineering. The assembly type flexible damping spiral anchor foundation comprises a damping bearing platform and a plurality of spiral anchor sets, wherein each spiral anchor set comprises a plurality of anchor rod sections, and the adjacent anchor rod sections are connected through spiral anchor discs; the flexible connecting section is installed between the top of the first anchor rod section and the damping bearing platform to form flexible connection, and the horizontal force borne by the anchor rod is reduced. The damping bearing platform and the spiral anchor set are connected together through the flexible connecting section, and the horizontal force borne by the anchor rod can be reduced; and the damping bearing platform is matched with the flexible connecting section to achieve the effects of damping and energy consumption.

The invention discloses an eutectic medium-entropy alloy with both high strength and high thermal stability and a preparation method thereof, belongs to the technical field of alloy materials, and relates to the technical field of eutectic medium-entropy alloys and preparation thereof, low-price metal raw materials of Cr, Fe, Ti and Nb are adopted, the alloy cost is greatly reduced, meanwhile, the excellent mechanical property and casting property of the alloy can be guaranteed, and the high-strength and high-thermal-stability eutectic medium-entropy alloy can be obtained. The alloy comprises Cr, Fe, Ti and Nb according to the molar ratio of 1: 1: 1: 2, and the alloy structure comprises a Laves/BCC full eutectic structure composed of a BCC phase and a Laves phase. The alloy has the characteristic of high strength and shows good high-temperature thermal stability. The alloy adopts Fe, Ti, Cr and other low-price elements, the cost is low, and the preparation method is simple and rapid, so that the alloy has potential industrial application prospects.

The invention discloses a hanging bracket structure capable of being freely disassembled and assembled and a splicing mode. The hanging bracket structure capable of being freely disassembled and assembled comprises a hanging bracket device formed by a plurality of groups of structural units, and I-shaped steel and angle steel forming the structural units, wherein the I-shaped steel comprises transverse I-shaped steel I, vertical I-shaped steel I, transverse I-shaped steel II, transverse I-shaped steel III and vertical and straight I-shaped steel I, the angle steel comprises first angle steel, second angle steel and third angle steel, stiffening ribs are arranged on the transverse I-shaped steel I and arranged on the transverse I-shaped steel I at equal intervals, the number of the transverse I-shaped steel I is two or more, the number of the vertical I-shaped steel I is two or more, one ends of the vertical I-shaped steel I are connected with one of the transverse I-shaped steel I, the other ends of the vertical I-shaped steel I are connected with the other transverse I-shaped steel I and are fixed at the two ends of the two transverse I-shaped steel I, and the number of the vertical I-shaped steel I is two or more. According to the hanging bracket structure capable of being freely disassembled and assembled, the structural units can be freely assembled into the hanging bracket with the proper size according to engineering requirements, the structural units can be repeatedly used, and the assembling procedure is simple.