20results about How to "High molding strength" patented technology

The invention belongs to the technical field of welding equipment, and particularly relates to a coal mining machine rack welding device which comprises a moving seat and a welding manipulator, the welding manipulator is fixedly mounted at the top of the moving seat and comprises a welding head, and the welding device further comprises an insulating sleeve mounted between the welding head and the movable end of the welding manipulator, the welding manipulator enables a welding wire to penetrate through the insulation sleeve and send out the welding wire from the welding head. The welding head is sleeved with the high-temperature smoke collecting unit, an air suction mechanism is installed on the side wall of the side, close to the welding head, of the welding manipulator, and an annular cavity is formed in the insulation sleeve. Welding flue gas can be filtered and purified, heat of the welding flue gas is used for preheating a welding wire, water on the surface of the welding wire is removed, impurities on the surface of the welding wire are softened, the welding seam forming quality is improved, the welding requirement of a rack of a coal mining machine is met, and meanwhile the position where defects possibly exist in the welding seam can be fed back in time.

The invention discloses a detachable assembly type building mold, relates to the technical field of building molds, and solves the technical problems that in the concrete forming process, the side pressure on a fixed baffle in the mold can be increased, and formwork deformation and slurry leakage are likely to be caused. Comprising two fixed templates which are installed on a bottom template in a sliding mode, and a base is arranged at the bottom of the bottom template; the supporting and positioning mechanisms are mounted on the base and support the base, and the two supporting and positioning mechanisms play a role in limiting and supporting the two fixed templates; the supporting and positioning mechanism comprises a bottom rail mounted on the upper surface of the base; according to the invention, the two fixed templates can be supported, the pressure of internal concrete on the fixed templates is shared, the deformation amount is reduced, and inward thrust is applied to the fixed templates in the mounting and supporting process, so that the fastening bolts on the side surfaces can be conveniently aligned and connected to adapt to the fixed templates with different heights; and the machining safety and stability of the mold on the concrete prefabricated part are improved.

The invention relates to the technical field of concrete prefabrication processing equipment, and particularly discloses a concrete prefabricated part processing and forming device which comprises a conveying table body, a discharging structure, a putting structure and a forming structure. A conveying belt is arranged in the middle of the upper wall of the conveying table body, the discharging structure is fixedly arranged on the rear side of the right end of the conveying table body, the putting structure is fixedly arranged on the rear side of the conveying table body and located on the left side of the discharging structure, and the forming structure is arranged on the conveying table body. The production line has the advantages of automation, flexibility, mold management, product quality improvement, labor intensity reduction, cost saving and the like, and an efficient and reliable production mode is provided for prefabrication production of road edge stone bricks.

The invention discloses a preparation method and application of a superfine iron-molybdenum catalyst, and belongs to the technical field of nano material synthesis. Aiming at the problem that the activity and the service life of the catalyst are affected due to the phenomena of sintering, segregation and the like of the iron-molybdenum catalyst under a high-temperature condition, a complexing agent and Fe < 3 + > are complexed in a strong acid environment to obtain a mother solution, the mother solution is soaked in MoO3 powder or subjected to co-precipitation with an ammonium molybdate solution or subjected to sol-gel preparation with ammonium molybdate, and the iron-molybdenum catalyst is prepared. And roasting to obtain the iron-molybdenum catalyst. Fe < 3 + > in the mother liquor is dispersed more uniformly, so that the particle size of iron-molybdenum powder is reduced, the particle size distribution range of the iron-molybdenum catalyst is narrowed, the dispersity of Fe and Mo components is enhanced, precipitation of Mo from a main phase is reduced, the activity of the catalyst is improved, and the service life of the catalyst is prolonged. The method is simple in preparation and low in cost, and the obtained superfine iron-molybdenum catalyst is high in selectivity and conversion rate and good in stability when being used for catalyzing selective oxidation of methanol to prepare formaldehyde and has commercial application and popularization value.

The invention provides composite modified asphalt and a preparation method thereof, and belongs to the technical field of high polymer materials, the composite modified asphalt contains SBS modified asphalt, modified tire rubber powder, epoxy asphalt, SBR, a high-modulus anti-rut agent, an asphalt warm mixing agent, maleic resin, rubber softening oil, ethylhexyl stearate, isopropyl stearate and the like; aH-110 asphalt, AH-90 asphalt and AH-70 asphalt are modified through an SBS modifier, and calcium stearate, isopropyl stearate, an asphalt warm mixing agent and the like are added; the modified tire rubber powder is obtained by adopting waste tire rubber powder as a raw material and carrying out surface composite coating modification on basalt fiber, silica fume and AH-130 asphalt powder. The composite modified asphalt prepared by melting and blending the components has good high-temperature stability, low-temperature crack resistance, fatigue resistance and water damage resistance, and can better adapt to the use environment of the viaduct.

The invention provides high-temperature-resistant composite fiber paper and a preparation method thereof.The preparation method comprises the steps that 1, basalt fibers and zirconium oxide fibers are defibered respectively, and basalt fiber slurry and zirconium oxide fiber slurry are obtained; (2) mixing the basalt fiber slurry and the zirconium oxide fiber slurry, and sequentially carrying out ultrasonic dispersion and ball milling treatment to obtain composite fiber slurry; and (3) carrying out wet molding on the composite fiber slurry, coating the surface of the molded composite fiber paper with a binder solution, and sequentially drying and curing to obtain the high-temperature-resistant composite fiber paper. According to the invention, the high-temperature-resistant composite fiber paper with the thickness of less than 1mm and higher strength can be continuously produced by a wet manufacturing process.

The present application discloses a multi-material complex structure ceramic part and its printing method, which relates to the field of additive manufacturing technology, and at least solves the technical problem that the prior art cannot print out a multi-material complex structure ceramic part with a complete structure. The printing method of the multi-material complex structure ceramic part comprises the following steps: adopting a multi-nozzle printing method, wherein the nozzles are respectively loaded with high-content ceramic ink and ceramic ink with a cross-linked network; during the printing process, the main bearing structure is printed with ceramic ink with a cross-linked network, and the filling structure is printed with high-content ceramic ink; after the printing is completed, a printed part is obtained; the printed part is subjected to a staged heating and shaping treatment to obtain a multi-material complex structure ceramic part.

The invention discloses a bio-based solvent type asphalt cold supplementing liquid, the raw materials of the cold supplementing liquid comprise petroleum asphalt, a diluent, a tackifying modifier and a bio-based underwater adhesive, and the bio-based underwater adhesive is one or a mixture of more than two of barnacle gum, mussel secreted adhesive protein and polyphenylene catechol ethylene; the cold patch material has very good binding power, can quickly form relatively high initial strength, has excellent water stability and strong water damage resistance, can complete crosslinking and effective adhesion under a water condition, and can establish functions of interface contact, molecular adsorption between various substrates and the like in the process, so that the cold patch material can be normally constructed under the condition that a pit slot has water; the system is not limited by environmental conditions and has higher instantaneity, so that the system is used for all-season all-weather construction and long-term storage; the concrete has the advantages of simple preparation process, excellent construction workability and initial stability, can be easily mixed and paved manually by using a shovel when being used for cold patch of asphalt mixtures, and has high initial strength and forming strength after pit slot repair.

The utility model discloses an impeller evanescent mode mould which comprises an upper mould and a lower mould, the upper surface of the lower mould is provided with a first limit groove used for assembling a first loose core, and the upper surface of the lower mould is provided with a plurality of groups of blade grooves which are uniformly arranged around the first limit groove. A first blade mold matched with the blade groove is movably assembled in each blade groove, an abutting space exists between the tail end face of each first blade mold and the corresponding inner wall of the blade groove, and a second limiting groove corresponding to the first limiting groove and assembled with a second core column is formed in the lower surface of the upper mold; the lower surface of the upper die is provided with second blade dies which are evenly arranged around the second limiting groove and matched with the first blade dies, and the lower surface of the upper die is provided with a plurality of sets of inclined pressing blocks abutting against the tails of the first blade dies. Product quality is effectively guaranteed, and the evanescent mode is not prone to deformation and damage.

The invention discloses a laser texturing auxiliary 3D printing forming device and method, and relates to the technical field of 3D printing, the laser texturing auxiliary 3D printing forming device comprises 3D printing equipment, a laser texturing auxiliary device and a laser texturing auxiliary device, the laser device is provided with a laser texturing head, the laser texturing head is connected with the 3D printing spray head, the laser texturing head and the 3D printing spray head are arranged in parallel, and the laser texturing head is located on the rear side of the advancing direction of the 3D printing spray head. The video monitoring and early warning system is installed above the 3D printing nozzle and used for monitoring the operation process of the 3D printing nozzle and the laser texturing head and meanwhile conducting early warning on the excessive texturing state. The computer control system is connected with the laser and the 3D printing device and used for controlling texturing and printing work. The device is matched with the method, the surface of each layer can be subjected to synchronous texturing treatment in the 3D printing process, and the interface bonding strength between the layers is enhanced.

The invention belongs to the technical field of polyurethane synthesis, and particularly relates to a catalyst for synthesizing hard polyurethane and a preparation method of the catalyst. According to the catalyst, bismuth iso-octoate is taken as a matrix, hydroxypropyl methyl cellulose is firstly adsorbed on the surface of bismuth iso-octoate, and then 2-aminoterephthalic acid and bismuth iso-octoate are complexed at a certain temperature, so that the bismuth iso-octoate can better exert catalytic activity and selectivity, and the generation of byproducts is inhibited; furthermore, a polyurethane product has excellent mechanical properties, and the catalyst is more suitable for preparing a hard polyurethane material.

A working area in the middle of a sliding plate body is provided with a long groove consistent with the sliding plate body in the length direction, one end of the long groove extends to the middle of a steel flowing hole of the sliding plate body, an inlay plate is installed in the long groove in a matched mode, and the end of the inlay plate is provided with an arc-shaped concave portion matched with the steel flowing hole in size. A layer of fire clay is arranged between the inlaying plate and the long groove, a plurality of clay locking grooves A are uniformly formed in the bottom surface of the long groove, the fire clay enters the clay locking grooves A, and clay locking grooves B are correspondingly formed in the middle of the end surface of the long groove and the middle of the end surface of the inlaying plate; the inlaying part of the inlaying plate is used in a key working area where the sliding plate is most seriously abraded, the advantages of high strength and scouring resistance of the inlaying plate are utilized, erosion to the sliding plate during steel casting of variety steel is reduced, the continuous sliding frequency of the sliding plate can be effectively increased, the use amount of refractory materials is reduced, and economic benefits are improved.

The invention belongs to the technical field of composite sheet production, and particularly relates to continuous thermoplastic one-way multi-layer composite sheet conveying equipment and method.The continuous thermoplastic one-way multi-layer composite sheet conveying equipment comprises a base, two pressure shaping set rollers, a filling and distributing device and two pressure composite set rollers; the two pressure shaping group rollers, the filling cloth device and the two pressure composite group rollers are fixedly mounted above the base, and the two pressure shaping group rollers are positioned on the front sides of the two pressure composite group rollers; the filling and distributing device is positioned on the rear sides of the two pressure composite group rollers; the two pressure setting group rollers are oppositely arranged, the bottoms of the two pressure setting group rollers are in bearing connection with sliding blocks, sliding rails are slidably connected to the lower portions of the sliding blocks, and the sliding rails are fixedly installed on the ground. And the integrating degree between materials is poor.

The utility model discloses a bottom valve assembly for an automobile shock absorber, and relates to the field of automobile shock absorbers, the bottom valve assembly comprises a bottom valve main body, a covering valve plate arranged on the upper portion of the bottom valve main body and other valve plates arranged on the lower portion of the bottom valve main body, and a valve line of the bottom valve main body is composed of a semicircle and an eccentric semicircle; the middle of the covering valve plate is composed of two semicircular structures, and the covering valve plate is matched with a valve line of the bottom valve body. According to the bottom valve, the valve line structure of the bottom valve is composed of the semicircle and the eccentric semicircle, an original structure in which the whole is intervened at the same time is changed into a structure capable of working in a distributed mode, and therefore it can be guaranteed that the valve plates cannot be opened or closed at the same time on the circumference but have a certain successive relation; and finally, the generated damping force is more linear, the noise risk is effectively reduced, and the comfort and safety of the vehicle are improved.

This invention discloses a cement concrete pavement structure for use in vehicular roads, relating to the field of road construction technology. The cement concrete pavement structure includes: a subbase layer composed of graded steel slag; an intermediate base layer composed of cement-stabilized steel slag; a sand cushion layer composed of sand; and a surface layer composed of cement concrete. The subbase layer, intermediate base layer, sand cushion layer, and surface layer are laid from bottom to top. The subbase layer is laid on the roadbed, the intermediate base layer is laid on top of the subbase layer, the sand cushion layer is laid on top of the intermediate base layer, and the surface layer is laid on top of the sand cushion layer. This invention provides a cement concrete pavement structure that can improve the strength of the pavement structure and environmentally treat waste steel slag, thereby improving resource utilization.

The invention belongs to the technical field of preparation of biomass fuels, and particularly relates to a mixed fuel prepared from corn straws and salix mongolica and a preparation method of the mixed fuel. The invention relates to a mixed fuel composed of corn straw and salix mongolica. The mixed fuel is obtained by mixing crushed corn straw and crushed salix mongolica according to a mass ratio of (1-3): 1 and then performing compression molding, the water content of the mixed fuel is 12%-18%; the unit density of the mixed fuel is 0.917 to 1.003 g / m < 3 >; the thickness of the interface transition layer of the mixed fuel reaches 8-15 microns; the pore size of the mixed fuel is smaller than 50 micrometers, and the mixed fuel meets the requirement of third-level fuel and is good in combustion performance.

The application discloses a design method, a hot forming plate and a vehicle, and relates to the technical field of vehicle engineering, wherein, in order to achieve the above-mentioned purpose, the design method comprises the following steps: selecting test design parameters of the first hot forming plate, the second hot forming plate and the third hot forming plate; obtaining first simulation performance parameters corresponding to the test design parameters through simulation software; judging whether the first simulation performance parameters meet a first performance condition; if yes, obtaining welding test parameters to prepare and weld test pieces, and obtaining welding performance parameters corresponding to the welding test parameters; judging whether the welding performance parameters meet the first performance condition; if yes, selecting the test design parameters and the corresponding welding test parameters as actual design parameters. The application effectively improves the lightweight degree and the debugging efficiency of the vehicle, and reduces the production cost.

The invention discloses a magnetic control adhesive material as well as a preparation method and application thereof, and belongs to the technical field of adhesive materials. The magnetic control adhesive material is prepared from the following components in parts by weight: 20 to 30 parts of polyurethane, 20 to 25 parts of magnetic powder, 5 to 10 parts of ferric oxide, 5 to 10 parts of activated calcium carbonate and 2.5 to 5 parts of insecticide. The magnetic control adhesive material is prepared by taking polyurethane as a main agent and adding magnetic powder, ferric oxide, activated calcium carbonate and insecticide, and the magnetic control adhesive material is applied to an ancient building under magnetic control, so that the ancient building can be accurately repaired, and the ancient building has relatively high corrosion resistance and strength; meanwhile, under the action of the insecticide, repeated proliferation of pests such as termites and the like can be inhibited, in addition, active calcium carbonate in the material can reduce the surface tension of colloid and enhance the bonding strength and the forming strength, and the structure of the ancient building is restored to be stable.

The invention discloses a method for preparing high-strength formed activated carbon from high-water-content waste powdery activated carbon and a product, and belongs to the technical field of activated carbon materials and environmental protection. The method comprises the following steps: by taking high-water-content waste powdery activated carbon as a raw material, compounding the high-water-content waste powdery activated carbon with a mineral soil adhesive, a reinforcing agent, a plasticizer and a green body reinforcing agent, heating and stirring, forming and granulating, drying and roasting, and screening to obtain formed activated carbon; the water content of the high-water-content waste powdery activated carbon is 45-65%, and the particle size is greater than or equal to 100 meshes; the mineral soil adhesive is a powder mixture of any one or two of kaolin and attapulgite, the particle size is greater than or equal to 100 meshes, and the viscosity is greater than or equal to 100 mPa.s. According to the method, the technical problems of dry-wet separation, mold blockage and the like caused by the existence of adsorbed water in the high-water-content waste powdery activated carbon in the extrusion granulation process are effectively solved, the particle strength and the ignition point of the formed activated carbon are remarkably improved, and the prepared formed activated carbon has the abrasive resistance larger than 97%, the ignition point larger than or equal to 400 DEG C and the carbon tetrachloride adsorption rate larger than or equal to 30%.

The utility model discloses gypsum board production equipment using a belt to make patterns, which relates to the technical field of gypsum board production and comprises a feeding mechanism, a stirring mechanism and a forming mechanism which are sequentially arranged, the forming mechanism comprises a support frame, a lower die belt and an upper die belt, and the lower die belt and the upper die belt are rotatably arranged on the support frame. One end of the lower mold belt is located below a discharge port of the stirring mechanism, the upper mold belt is located above the lower mold belt, the length of the upper mold belt is smaller than that of the lower mold belt, two flange rubber strips are arranged on the lower mold belt in parallel, and a gypsum board forming space is defined by the upper mold belt, the lower mold belt and the two flange rubber strips; the surface of the upper die belt is of a plane structure, and gypsum board forming lines are arranged on the surface of the lower die belt. The gypsum board forming space is defined by the upper die belt, the lower die belt and the two flange rubber strips, no separation rubber strip is used as a gap, and the forming effect of a gypsum board can be remarkably improved.