31results about How to "Counteract internal stress" patented technology

The invention discloses anti-seepage, anti-freeze-thaw self-compacting concrete and a preparation method thereof. The anti-seepage, anti-freeze-thaw self-compacting concrete comprises the following components in parts by weight: 350-370 parts of cement, 25-45 parts of fly ash, 25-35 parts of modified metakaolin, 30-50 parts of mineral powder, 770-800 parts of medium sand, 810-830 parts of crushedstone, 20-40 parts of silica fume, 170-180 parts of water, 1-3 parts of a water reducing agent, 20-34 parts of an expansion agent, 2-6 parts of an air entraining agent, and 10-20 parts of a fiber composition, wherein the fiber composition is prepared by mixing a modified polyester fiber, a basalt fiber and a polyacrylonitrile fiber in a mass ratio of 1:0.6-0.9:0.3-0.6. The anti-seepage, anti-freeze-thaw self-compacting concrete has the advantages of good workability and fluidity, and excellent anti-seepage performance and anti-freezing performance.

The invention belongs to the technical field of pipelines, and provides a high-pressure-resistant and impermeable heat-preservation composite pipeline and a preparation method thereof. The heat-preservation composite pipeline comprises an inner-layer working layer, a middle-layer insulating layer and an outer-layer protective layer which are sequentially arranged from inside to outside, wherein the inner-layer working layer comprises an impermeable barrier layer, a polyethylene material layer, a modified reinforcing layer, a heat-sensitive micro-foaming adhesive layer and a prepreg tape winding layer which are sequentially arranged from inside to outside, wherein the polyethylene material layer is a PERT-II type high-density polyethylene material layer, the impermeable barrier layer is made of nylon MXD6 or ethylene/vinyl alcohol copolymers, the modified reinforcing layer is a glass fiber reinforced nylon MXD6 layer, the prepreg tape winding layer is a glass fiber reinforced polyethylene prepreg tape layer, and the modified reinforcing layer is composed of the following components of, in parts by weight, 35-50 parts of nylon MXD6, 15-50 parts of glass fiber, 0.2-1 part of a silanecoupling agent, 1-2 parts of an antioxidant, 0.5-1 part of a lubricant and 5-15 parts of a toughening agent. The heat-preservation composite pipeline and the preparation method solve the problem thatthe high-density polyethylene composite heat preservation pipeline is low in pressure resistance.

The invention discloses a novel automatic full-spectrum radiometric calibration reference target device, and relates to the technical field of the aerial remote sensing. The device comprises a reflector module, a sun sensor module, an attitude regulation and control module and an electric control system; the attitude regulation and control module is connected with the reflector module and used for driving the reflector module to rotate; the sun sensor module is arranged on the reflector module, and an optical axis of the sun sensor module is parallel to a reflector normal of the reflector module; and the sun sensor module and the attitude regulation and control module are connected with electric control system. The device disclosed by the invention is suitable for the full-spectrum radiometric calibration of high-orbit and low-orbit optical remote sensing satellites, thereby realizing the absolute radiometric calibration and image quality assessment of satellite loads at different orbits at the sun reflection waveband, the middle infrared waveband and the hot infrared waveband (0.35 micron to 12.5 micron).

The invention provides a polymer-based double-layer nanofiber composite proton exchange membrane, and the proton exchange membrane comprises a polymer layer and two fiber layers compounded with the polymer layer, wherein the polymer layer is located between the two fiber layers; and the polymer layer comprises a polymer electrolyte, and the fiber layer comprises nanofibers. The polymer-based double-layer nanofiber composite proton exchange membrane provided by the invention has good proton conductivity, structural stability and other properties.

The invention discloses a mesoporous silicon-tin composite electrode material and a preparation method thereof, and application thereof. The mesoporous silicon-tin composite electrode material has a pore structure of 5 to 40 nm, and the mass fraction of tin accounts for 5 to 20%. The preparation method comprises the steps of: preparing a mesoporous silicon by a magnesium thermal reaction of a mixture of magnesium powder and mesoporous silica; and preparing a mesoporous silicon-tin composite by employing a dipping hydrogen reduction method. The invention also provides the application of the mesoporous silicon-tin composite electrode material in the preparation of the lithium ion battery negative electrode. The mesoporous silicon-tin composite electrode material is high in reversible capacity, good in cycle stability and good in rate performance and can perform large-scale production.

The invention discloses a welding method of a steel structure tetrahedron huge column. The method is used for assembling and welding front, back, left and right parts forming the tetrahedron huge column and comprises the following welding steps that (1) spot welding between main plates of the front and back parts and corresponding longitudinal and transverse rib plates is performed; (2) main plates of the left part and the right part are assembled with the main plates of the front part and the back part in a spot welding mode respectively, the assembling and welding angle between the main plate of the front part and the main plate of the right part and the assembling and welding angle between the main plate of the back part and the main plate of the left part are both 90 degrees, the assembling and welding angle between the main plate of the front part and the main plate of the left part is smaller than 90 degrees, and the assembling and welding angle between the main plate of the backpart and the main plate of the right part is greater than 90 degrees; (3) the corresponding longitudinal and transverse rib plates is spot-welded on the main plates of the left part and the right part; (4) the spot-welded longitudinal and transverse rib plates are welded on the main plates of the corresponding parts; (5) the alignment rib plates between the main plates of the adjacent parts are welded into a whole; and (6) an inner side main welding seam and an outer side main welding seam between the main plates of the adjacent parts are welded.

The present invention relates to a display panel, include an array substrate, A light emitting unit provided on the array substrate and a pixel defining layer provided between adjacent light emittingunits, The light emitting unit comprises a first electrode layer (3), a light emitting layer (4) and a second electrode layer (5) arranged in a stacked order, the pixel defining layer and at least part of the surface of the light emitting unit being in a smooth curved surface, and the light emitting unit has a surface matching the smooth curved surface of the pixel defining layer. A display panelof the present invention and a display device having the same, A surface of a portion of a plurality of film layer including a pixel-defining lay and a corresponding light emitting unit is designed with a smooth curved surface, The contact area between the film layers can be enlarged, the adhesion effect between the film layers can be enhanced, and the external force can be better dispersed when the film layers are impacted by the external force, and the internal stress can be partially offset, so that the impact resistance of the panel and the device can be greatly enhanced.

The invention discloses a high-stability fixing clamp capable of counteracting machining internal stress, and relates to the technical field of fixing clamps, the high-stability fixing clamp comprises a lower die base, bending machine bodies are fixedly installed at the two ends of the lower die base, upper dies are movably installed at the tops of the bending machine bodies, and clamping clamps are fixedly installed on the side edges of the bending machine bodies; and a guide positioning device is fixedly mounted on the clamping fixture. According to the scheme, the clamping fixture is fixedly installed on the side edge of the bending machine body, the heating block is movably installed in the lifting groove, the buffering device is fixedly installed at the bottom of the heating block, in the working process of the device, a workpiece is fixed left and right through the guide plate, the workpiece is fixed through the pressing plate through the fixing bolts, and a certain part of the workpiece is heated through the heating device; the upper die is pressed downwards, the heating block descends through the buffer device, the workpiece is heated, the internal stress of the workpiece is offset, the workpiece is more stable, manpower and time are saved, the product quality is improved, and the product production effect is more ideal.

The invention discloses an Sn-C compound electrode material and a preparation method and application thereof. The Sn-C compound electrode material has a complete C coating structure, the preparation method comprises the steps that SnCl2.2H2O and starch are fully dissolved in deionized water according to a certain ratio, then ultrasonic dispersion is carried out, after dispersing evenly is carriedout, vacuum drying is carried out, and lastly heat treatment is carried out in a tube furnace (argon atmosphere, 900 DEG C) to obtain an Sn-C compound. The invention further provides the application of the Sn-C compound electrode material in preparing a lithium ion battery negative electrode, the Sn-C compound electrode material has the advantages that the reversible capacity is high, the cyclingstability is good, the rate performance is good, and the scale production can be achieved.

The invention discloses a combined rectangular oil cylinder. The oil cylinder is formed by combining a plurality of components of a cylinder body, wherein the components of the cylinder body consist of four cylinder wall structural blocks and four corner fixing blocks in the longitudinal direction of an oil cylinder body; four corners of every two adjacent cylinder wall structural blocks are obliquely joined at 45 degrees and sealed in the middle; the outsides of the four corners are fixed by the four corner fixing blocks; a wire winding layer is tightly wound around the corner fixing blocks; and a wedging block group is tightly wedged between the winding layer and the cylinder wall structural blocks to further tighten the wire so as to reach a larger pre-tightening force. An upper end cover and a lower end cover are fixed at two ends by bolts. The wire winding layer of the oil cylinder makes the cylinder body generate an internal stress in advance, and the wire presses wedging blocks to generate a pre-stressed force to the cylinder wall so as to eliminate the internal pressure to the cylinder wall in the use of the oil cylinder. The corner fixing block generates a pre-stressed force to four corners of the cylinder wall to eliminate an internal stress to the corners of the cylinder wall. The combined rectangular oil cylinder solves the stress deformation and other processing problems in the use of the oil cylinder in the prior art.