108results about How to "Avoid strength loss" patented technology

The invention relates to a cement-based composite material suitable for making a building structure and components through a 3D printing rapid-forming process. The cement-based composite material is characterized in that an extrudable property is good, a stacking property is good, printing time is controllable, and mechanical properties and durability are excellent. Regarding detailed properties, the material has good thixotropy, controllable condensing and hardening time and good adhesion, hour strength development is rapid, and strength growth is stable at the later stage, requirements for the 3D printing process and rapid construction can be met, and actual application of the 3D printing technology in the building industry is promoted easily. The cement-based composite material includes 100 parts of ordinary Portland cement, 100-300 parts of fine aggregate, 5-20 parts of strength-promoting shrinkage reducing agent, 30-60 parts of mixing water, 0.1-2.0 parts of water reducing agent, 0.5-15 parts of interface reinforcing agent, 0.05-0.2 part of thixotropic agent and 0.5-3.5 parts of liquid coagulating components.

The invention relates to porous silicon carbide ceramic and a preparation method thereof. The preparation method comprises the following steps: mixing silicon carbide, aluminum hydroxide, fumed silica, water, a dispersant and a binder so as to obtain slurry, wherein the sum of the mass of aluminum hydroxide and fumed silica accounts for 5 to 30% of the sum of the mass of silicon carbide, aluminum hydroxide and fumed silica, and a mol ratio of aluminum hydroxide to fumed silica is 2-5: 1; drying the slurry so as to obtain mixed powder; molding the mixed powder to obtain a green body; and sintering the green body in an air atmosphere at 1310 to 1340 DEG C so as to obtain the porous silicon carbide ceramic. The preparation method can prepare the porous silicon carbide ceramic with good bending resistance at a low sintering temperature.

The invention discloses a moderate-intensity anti-corrosion aluminium alloy material and an aluminium alloy rod for a cable. The moderate-intensity anti-corrosion aluminium alloy material comprises the components of iron, silicon, magnesium, boron, copper, zinc, rare earth and the balance of aluminium; in a preparation process, an aluminium ingot, aluminum-boron alloy, aluminum-silicon alloy, aluminum-iron alloy, aluminum-rare earth alloy, aluminum-copper alloy, aluminum-zinc alloy and a magnesium alloy ingot are smelted to form alloy liquid, the alloy liquid is refined and stands by thermal insulation, component regulation is performed, then casting is performed to obtain a cast ingot, and homogenization treatment is performed on the cast ingot to obtain a homogenized cast ingot; the homogenized cast ingot is water-cooled, then hot rolling is performed, and the cast ingot is cooled to be below 100 DEG C to obtain hot rolling aluminum alloy; the hot rolling aluminum alloy is heated, kept warm and then cooled to room temperature, and precipitation heat treatment is performed to obtain the moderate-intensity anti-corrosion aluminium alloy material. The moderate-intensity anti-corrosion aluminium alloy material and the aluminium alloy rod for the cable are high in mechanical strength, good in corrosion resistance and excellent in comprehensive performance.

The invention relates to a cross-linked polyimide-based micro/nano fiber membrane and a preparation method thereof. The preparation method comprises the steps that firstly, a polyimide solution is synthesized in a non-proton polar solvent by using a one-step method, and a polyimide micro/nano fiber membrane is obtained through the solution jet spinning technology; the polyimide micro/nano fiber membrane is immersed a solution containing furan-based aromatic polyamide and a cross-linking agent, micro/nano fiber in the fiber membrane is subjected to chemical crosslinking at the crossed portion through hot pressing, and the cross-linked polyimide-based micro/nano fiber membrane is prepared, wherein the thickness of the cross-linked polyimide-based micro/nano fiber membrane is 16-80 micrometers, the tensile stress of the cross-linked polyimide-based micro/nano is 15-25 MPa, and the aperture is 1.3-1.8 micrometers. The preparation process is simple, the production efficiency is high, the cost is low, and the method is suitable for industrial production; the prepared product is of a cross-linked structure, the mechanical property is greatly improved, the pore structure is adjustable, and the product has good application prospects in fields of diaphragms of lithium ion batteries, catalyst carriers, efficient adsorbents, high-temperature flue gas filter membranes and the like.

The invention provides a non-initiating unlocking device and a locking and unlocking method thereof, which belongs to the field of unlocking devices. The device comprising a fastening cord, A hot knife assembly and at least two locking release members, the lock release member is used for fixing on the first member and the lock release member is used for fixing on the first member, the fastening cord is for providing a tightening force to the lock release member such that the lock release member locks the second member in a first state, the hot knife assembly comprises a hot knife and a hot knife mounting part, The hot knife mounting part is made of heat insulating material, the hot knife is arranged in the hot knife mounting part, the fastening rope is in close contact with the hot knife,and the hot knife is an electric heating element for generating heat to fuse the fastening rope, so that the locking releasing part returns to the second state and releases the second part. The invention avoids the carbonaceous fragments caused by the radial thrust, and the hot knife and the hot knife mounting part are structured under the space environment, and the performance is stable and the reliability is high.

The invention discloses an augmented reality microscope. The microscope comprises an objective lens, an ocular lens, an N-mesh observation cylinder, an image acquisition module and an image projectionmodule, wherein N is greater than 2, the image acquisition module is physically connected with the N-mesh observation cylinder through a physical interface of the N-mesh observation cylinder, after the light generated by a measured object during observation enters the light path through the objective lens and the light generated by an image projection device in the image projection module entersthe light path through a lens device, the light converges at a light splitting device in the image projection module, then the converged light passes through the N-mesh observation cylinder, one partof the converged light enters the ocular lens, the other part of the converged light enters the image acquisition module, the image acquisition module is used for outputting acquired images to the image processing device, the image processing device processes the images and outputs the processing result to the image projection device, the image acquisition optical path and the image projection optical path are independent of each other, and thereby calibration is facilitated, and image processing precision is improved. The invention further discloses corresponding image projection equipment and an image processing system.

Provided is a lever type connector wherein secondary latching and unlatching of a contact by a retainer can be carried out positively with good work efficiency. The lever type connector (1) comprises a retainer (45) being fitted to an inner housing (40), an outer housing (50) for housing the inner housing (40), and a slider (13) which can be moved between a fitting start position and a fitting completion position. In the lever type connector (1), secondary latching of the contact is effected by arranging the retainer (45) at a regular fitting position. First holes (5, 6) for operating the retainer are provided in the vertical-direction side surface of the outer housing (50) and laterably to the retainer (45), and second holes (3, 4) for operating the retainer are provided in the slider (13). Only when the slider (13) is arranged at the fitting completion position, the first holes (5, 6) for operating the retainer and the second holes (3, 4) for operating the retainer communicate with each other.

The invention discloses a household garbage incineration fly ash wet-method mold bag treatment method. By means of three links of fly ash slurrying, fly ash slurry conveying and fly ash slurry dewatering/hydrating solidification, fly ash homogenizing, heavy metal and dioxin detoxifying, desalting and spontaneous hydrating solidification forming are achieved sufficiently at the same time; fly ash in mold bags after solidification meets related national standard requirements, solidified mold bag bodies can be subjected to landfill disposal, and fly ash can be taken out of the mold bags to be subjected to resource utilization; and liquid drained out of the mold bags is subjected to natural evaporation and concentration through a landfill space, after heavy metal and dioxin are recycled and impurities are filtered and removed, the liquid is recycled, or after further salt removing is carried out, the liquid is recycled. The invention further discloses a household garbage incineration fly ash wet-method mold bag treatment system. The household garbage incineration fly ash wet-method mold bag treatment method and system can overcome the defects of traditional fly ash dry-method landfill and a water washing pretreatment technology in large-scale industrial application, fly ash homogenizing, detoxifying, desalting, spontaneous hydrating solidification and landfill integrated treatment can be achieved, a basis is laid for follow-up fly ash resource utilization, the treatment cost is low, and the household garbage incineration fly ash wet-method mold bag treatment method and system can be applied to large-scale industrial production.

Object is to downsize a sliding structure-side and/or fixed structure-side power supply device and prevent interference between a wiring harness and a fixed structure in a fully-opened state of a sliding structure. A power supply apparatus for sliding structure (21) includes a wiring harness having an exterior member (7) wired from a fixed structure-side power supply device (4) to the sliding structure (5) side, the fixed structure-side power supply device (4) including an outer member (8) fixed to the fixed structure (1), an inner member (9) supported to the outer member so as to rotate in a horizontal direction and configured to support one end portion of the exterior member, and a harness trajectory regulation wall (11) configured to rotate integrally with the inner member. When the sliding structure (5) is fully-opened, the harness trajectory regulation wall (11) projects outward from the outer member in a thickness direction of the sliding structure, such that the exterior member (7) arranged along the harness trajectory regulation wall is moved away from the fixed structure toward the sliding structure side, preventing interference between the exterior member and the fixed structure.

The invention relates to an apparatus for optically analysing samples contained in sample sites of a sample holder, the apparatus comprising a first light source and at least one second light source, a monochromator having an input to which first light source is optically connected or connectable and an output for monochromatized light, light guiding means for guiding light originating from the first and from the at least one second light sources to the sample sites, and a detector for detecting light from the sample sites. According to the invention, the apparatus further comprises a light relay comprising a first input optically connected to the output of the monochromator, at least one second input optically connected or connectable to a second light source such that the light from the second light source by-passes the monochromator, and a first output for guiding light from selected input of the light relay to the sample sites. By means of the invention, a versatile sample analyser can be achieved in a cost-effective manner.

A gypsum slurry includes calcium sulfate hemihydrate, water and calcium sulfate dihydrate, where the calcium sulfate dihydrate is added downstream of the mixer.

In an optional embodiment, the a gypsum slurry includes calcium sulfate hemihydrate, a polycarboxylate dispersant, water and coated calcium sulfate dihydrate. In this case, the hydrophilic, dispersible coating is selected to serve as a modifier to enhance the ability of the dispersant to fluidize the gypsum slurry.

The invention discloses a composite column and a fabrication method of the composite column. The composite column comprises a high-strength concrete core and a prefabricated steel fiber reinforced concrete pipe, wherein the high-strength concrete core is cast in situ into the steel fiber reinforced concrete pipe; stirrups and longitudinal bearing steel bars are embedded into the steel fiber reinforced concrete pipe; and the surfaces of the longitudinal bearing steel bars are coated with antirust coatings. According to the composite column, the antirust coatings are arranged on the surfaces of the longitudinal bearing steel bars, so that the corrosion resistance of the longitudinal bearing steel bars can be improved by utilizing the antirust coatings; adhesive forces between the longitudinal bearing steel bars and the steel fiber reinforced concrete pipe are small due to action of the antirust coatings, so that deformation of the longitudinal bearing steel bars is relatively independent; when the composite column generates larger deformation due to an earthquake or a large outside acting force, tensile deformation of a concrete part of the steel fiber reinforced concrete pipe is reduced and cracking of concrete is delayed; and the recovery capability of the longitudinal bearing steel bars is significant after the earthquake or deformation reduction due to constraint reduction, so that repair is easy and the resource is saved.

The invention discloses a manufacturing method of thick-wall high-strength ship plate steel for high heat input welding, and relates to the technical field of steel production. A high-cleanliness smelting blank is obtained through a magnesium metallurgy technology by adopting a converter and RH vacuum treatment, a high-reduction rolling deformation technology is carried out below a recrystallization temperature according to a metallurgical principle technology, by means of magnesium metallurgy, growth of austenite grains is effectively controlled in microalloy, the thick-wall high-strength ship plate with fine grains and excellent performance is obtained in cooperation with the after-rolling rapid cooling process, a yield strength ranges from 400 MPa to 600 MPa, and the requirement for high heat input welding is met.

The invention discloses a fused deposition type 3D printing method based on a biopolymer prefabricated bar. According to the novel printing method, the biological prefabricated bar and a specially-made printing spray head are effectively combined. The structure principle is simple, operation is convenient, and the customized biological prefabricated bar with the higher degree of freedom can be manufactured. In subsequent application, the excellent performance of organic polymeric materials is maintained while smooth pushing, fusing and extruding of the bar are guaranteed, and pollution and waste of the biomedical polymer materials in the actual printing process are effectively avoided.

Relating to the technical field of glass, the invention discloses an inking process of automobile glass. The method includes the steps of: 1) preparation of varnish; 2) preparation of low-melting-point glass powder; 3) preparation of glass ink; 4) pretreatment of an automobile glass substrate: wiping the automobile glass substrate with acetone and then performing drying; 5) primary sintering: printing glass ink on the plane at the peripheral edge of the pretreated automobile glass substrate in a silk-screen printing mode to form an ink layer, and performing primary sintering; and 6) secondarysintering: spraying nitrogen with silicon carbide composite particles to the surface of the ink layer, performing secondary sintering, then taking out the product, and conducting cooling. The siliconcarbide layer with corrosion resistance is prepared on the surface of the automobile glass ink layer to increase the roughness of the automobile glass ink surface, thus endowing the surface of the automobile glass ink layer with super-hydrophobicity, preventing acid rainwater from contacting the surface of the ink layer, and prolonging the service life of the glass ink layer.

The invention discloses a seepage-proof water-stop cushion for an inspection shaft. The seepage-proof water-stop cushion comprises a cushion plate made of elastic flexible materials, wherein a round, fan-shaped or rectangular through hole is formed in the center of the cushion plate; the outer ring of the cushion plate has the same shape as the through hole; the size of the through hole is same as that of the cross section of the inner wall of the inspection shaft; and the size of the outer ring of the cushion plate is greater than that of the cross section of the outer wall of the inspection shaft. According to the technical scheme, the cushion plate is laid between the upper surface of a walling crib of the inspection shaft and the lower surface of a well lid base, the edge of the inner ring of the cushion plate is consistent with the inner ring of the inspection shaft wall, and the outer edge of the cushion plate is laid between a roadbase and a pavement, so that the elastic sealing function of the cushion plate can effectively prevent rainwater on the pavement from seeping along the crack and gap between the outer side of the inspection shaft wall and the pavement, a rammed earth layer around the inspection shaft is prevented from losing strength after long-term immersion by rainwater, the roadbase can maintain favorable consistency and bearing capacity all along, the smoothness of a road can be maintained, the inspection shaft can be protected, and the service life of the inspection shaft can be prolonged.

The invention discloses a preparation method for an intermediate-strength aluminium alloy rod. The preparation method comprises the following steps: smelting an aluminium ingot, aluminium-silicon alloy, aluminium-iron alloy, a magnesium ingot and aluminium-tombarthite alloy at 720-750 DEG C to form an alloy liquid, then degassing and refining at 730-740 DEG C, then standing at 720-730 DEG C for 30-50 min, and casting to obtain an ingot; adjusting and controlling alloy liquid components before casting, wherein the adjusted and controlled alloy liquid comprises the following components in percentage by weight: smaller than or equal to 0.30% of alloy, 0.30-0.50% of silicon, 0.30-0.50% of magnesium, 0.10-0.15% of tombarthite and the balance of aluminium; performing water cooling on the obtained ingot, then conducting hot rolling, and cooling so as to obtain a hot rolled aluminium alloy rod; conducting artificial aging on the obtained hot rolled aluminium alloy rod, wherein the artificial aging temperature is 150-160 DEG C, and the artificial aging time is 3.5-4 h, so as to obtain the intermediate-strength aluminium alloy rod. The invention further discloses the intermediate-strength aluminium alloy rod obtained by adopting the preparation method for the intermediate-strength aluminium alloy rod.

The invention provides a 3D printed steel fiber reinforced concrete tunnel preliminary support grating arch frame and a construction method thereof. The arch frame is divided into a plurality of unitjoints in the extending direction of the arch frame. Each unit joint is formed in an integral printed manner through 3D printing equipment. Each unit joint comprises a 3D printed outer support plate,a 3D printed reinforcing support, a 3D printed inner side support and 3D printed bolt connecting plates. The 3D printed bolt connecting plates are arranged at the head end and the tail end of each unit joint. Transverse plates of two L-shaped plates on the same side of two adjacent unit joints are mutually connected to form the overall arch frame. According to the arch frame, the steel fiber reinforced concrete outer support plates are large in stress area, can bear surrounding rock pressure more effectively than grating steel frame main reinforcement, and can effectively ensure stress performance of preliminary support components. The arch frame is integrally manufactured by adopting the printing form of a 3D printer, the weight of the arch frame is low compared with grating steel arch frame preliminary support components, hoisting and installing are facilitated, and the hoisting cost can be reduced effectively. Meanwhile, the situation that traditionally, grating steel frame is welded and machined manually on preliminary support site is avoided, the labor cost is reduced, and the construction period is shortened.

The invention provides a synchronous switched reluctance motor, mainly comprising a three-phase stator, a salient pole rotor, a rotor position sensor, a casing, a motor controller and a shaft, whereinthe three-phase stator adopts a three-phase concentrated winding or a three-phase distributed winding and generates a synchronous rotating magnetic field under the driving control of the motor controller, and the strength and rotating speed of the synchronous rotating magnetic field can be controlled by the motor controller through the three-phase stator; the salient pole rotor does not include apermanent magnet or a squirrel cage structure, does not need to open a reluctance groove, is formed by laminating only silicon steel sheets and has an even number of salient poles; the three-phase stator is mounted inside the casing, the salient pole rotor is mounted on the shaft and mounted on the casing through the shaft, and the rotor position sensor is mounted at one end of the shaft; and thethree-phase stator and the salient pole rotor constitute a radial magnetic circuit. The novel synchronous switched reluctance motor not only retains the advantages of simple structure of a switched reluctance motor and the advantages of small torque ripple and low noise of a synchronous reluctance motor, but also overcomes the large torque ripple of the switched reluctance motor and the complicated structure of the synchronous reluctance motor.

The invention provides an aluminum alloy thin-wall component as well as an efficient hot stamping forming method and application thereof. According to the aluminum alloy thin-wall component as well as the efficient hot stamping forming method and application thereof, by means of the characteristics of high efficiency, fast rhythm and high integration degree of a progressive die, the process steps of rapid heating-precooling and predeformation-final forming of a cold die are integrated into one progressive die, and paint baking treatment is carried out, namely, aging-state high-strength aluminum alloy is adopted, carries out rapid heat exchange by making contact with a heating flat plate die, and a forming temperature interval can be reached by controlling a contact pressure and maintaining the pressure for a short time; uniform accumulative dislocation of strain is generated through the precooling and predeformation, meanwhile, a high-temperature softening phenomenon of the aluminum alloy material in a high-temperature deformation stage is avoided, and the purpose of deformation is achieved; and finally, stamping is carried out in a room-temperature final forming die to obtain a required part, and the paint baking treatment is carried out. According to the method, the production cycle for an aluminum alloy hot-formed part is greatly shortened, the method is suitable for a fast-rhythm continuous industrial production mode, and high in process step integration degree, the equipment cost and the time cost are saved, and meanwhile the mechanical property of the formed part is guaranteed.