10results about How to "Increased mechanical occlusion" patented technology

This invention relates to a prefabricated 3D-printed box-type concrete retaining wall and retaining wall system. The prefabricated 3D-printed box-type concrete retaining wall is assembled from 3D-printed concrete retaining wall units. Each 3D-printed concrete retaining wall unit is an integrated 3D-printed concrete structure, consisting of an arched outer wall panel, a concave inner wall panel, and concave side wall panels, which enclose a cavity. A transverse keyway is formed between the concave side wall panels of adjacent 3D-printed concrete box-type retaining wall units. Shear keys are formed by casting cement-based material within the transverse keyway, enabling the combined load-bearing capacity of the 3D-printed concrete retaining wall units. Under the same loading conditions, the peak bearing capacity of the structure of this invention is significantly improved compared to traditional vertical box-type retaining walls, and the bearing performance is further enhanced under simulated backfill conditions, demonstrating good engineering applicability and green construction value.

The invention discloses an anti-scouring tundish dry material, and relates to the technical field of tundish refractory materials, and the tundish dry material comprises the following raw material components by mass: 28-32% of 3-1mm fused magnesite, 10-20% of alumina powder, 10-20% of alumina powder, and the balance of alumina powder. The invention relates to an ultra-low thermal conductivity refractory brick which comprises the following components in percentage by weight: 22-30% of 1-0mm fused magnesia, 20-28% of 200-mesh fused magnesia, 3-4.5% of phenolic resin, 1-1.4% of rectorite powder, 0.2-0.3% of SiO2 aerogel powder and the balance of 5-3mm fused magnesia. According to the ultra-low thermal conductivity refractory brick, the special layered structure of the rectorite powder and the ultra-low thermal conductivity of the SiO2 aerogel powder are ingeniously utilized; through the synergistic effect of the two components, the tundish dry material successfully solves the problems of insufficient strength and poor thermal insulation performance on the basis of keeping the original good fire resistance, and the efficiency and economical efficiency of a continuous casting process are remarkably improved.

This utility model discloses a vacuum treatment device based on PVD coating technology, including an equipment cabinet, a side cabinet shell, and a rotating motor. A coating mechanism for coating is provided on one side of the side cabinet shell. The coating mechanism includes a coating tank fixedly connected to the equipment cabinet, with a sun gear movably connected inside the coating tank. The output shaft of the rotating motor is fixedly connected to a planetary carrier via a rotating shaft. This device can remove impurities such as oil and oxide scale from the workpiece surface, increase the specific surface area, and improve the mechanical bonding ability between the coating material and the workpiece. It solves the problems of poor film adhesion and easy peeling caused by the lack of sandblasting treatment in traditional devices. Furthermore, it ensures that the film material adheres tightly to the workpiece, effectively reducing defects such as bubbles and pinholes, especially for workpieces made of special materials, significantly improving the bonding strength between the film and the workpiece, as well as the performance and service life of the coated product.

The invention relates to the technical field of building materials, in particular to EPS (expandable polystyrene) reinforced foam concrete and a preparation method thereof, and the EPS reinforced foam concrete is prepared from the following raw materials in parts by weight: 50-60 parts of cement, 20-25 parts of water, 0.8-1.2 parts of EPS, 0.8-1.2 parts of foam group, 0.01-0.1 part of rubber powder and 0.4-0.9 part of water reducing agent. Through cooperation of the EPS particles, the foam group, the cement, the water reducing agent and the rubber powder, a light porous structure which takes EPS and closed foam as cores and is extremely low in volume weight is formed, meanwhile, by means of a compact gelling inclusion and a reinforced interface, the material obtains compression resistance and breaking strength far superior to those of conventional foam concrete, shrinkage cracking is effectively inhibited, and the service life of the material is prolonged. The unification of light weight, high strength and toughness is realized.

This utility model relates to the field of sealing technology, specifically to a wear-resistant packing for a pumping unit. It includes a rubber substrate, with an anti-corrosion layer and a wear-resistant layer sequentially arranged from the inside out on the outer side of the rubber substrate. An upper rubber layer is bonded and sealed to the upper end of the wear-resistant layer, and an upper adhesive layer is coated on the upper end of the upper rubber layer. A lower rubber layer is bonded and sealed to the lower end of the wear-resistant layer, and a lower adhesive layer is coated on the lower end of the lower rubber layer. An insert rod is fixed inside the lower end of the rubber substrate, with its lower end penetrating the anti-corrosion layer and the wear-resistant layer and extending into the lower rubber layer. Multiple support frames are arranged inside the rubber substrate, and the support frames are fixedly connected to an elastic steel strip. The wear-resistant layer, anti-corrosion layer, and rubber substrate of this utility model form a gradient protection system. Combined with the flexible wrapping of the bonding interface by the upper and lower rubber layers, it achieves dual isolation from chemical corrosion and mechanical wear, ensuring long-term sealing integrity.

The invention discloses a multi-layer integrated cell-loaded nerve repair conduit with conductive, anti-inflammatory and neural differentiation promoting functions and a preparation method thereof. The preparation method comprises the following steps: 1) preparing PLGA fibers doped with graphene, and weaving the PLGA fibers to obtain a layer of cylindrical fiber net; 2) preparing an HAMA mixed solution mixed with microspheres loaded with nerve growth promoting factors and manganese dioxide nanoparticles, and an HAMA solution loaded with neural stem cells; 3) fixing the cylindrical fiber net in a cylindrical groove mold, pouring an HAMA mixed solution, and freeze-drying after UV curing to obtain a two-layer porous composite scaffold; and (4) dipping in a neural stem cell-loaded HAMA solution, quickly curing to form three cell-loaded gel layers, and culturing in vitro for 4-8W to obtain the multi-layer integrated cell-loaded neural repair conduit. The nerve repair catheter has the functions of conducting electricity, resisting inflammation and promoting neural differentiation, and a brand new strategy is provided for nerve and spinal cord injury repair.

The utility model discloses a waterstop steel plate of double -sided waterstop belongs to waterstop steel plate technical field. Waterstop steel plate of double -sided waterstop is composed by waterstop main plate, first waterstop wing board and second waterstop wing board. Two first waterstop wing boards are equipped with, two first waterstop wing boards are located at the both ends of waterstop main plate, and two first waterstop wing boards are bent to the same side to form first waterstop surface. Two second waterstop wing boards are equipped with, two second waterstop wing boards are located at the both ends of waterstop main plate, and two second waterstop wing boards are bent to the same side to form second waterstop surface, and the bending direction of second waterstop wing board is opposite with the bending direction of first waterstop wing board, and second waterstop wing board and waterstop main plate and first waterstop wing board are X type structure. Waterstop steel plate of double -sided waterstop provided by the utility model can cope with bidirectional water pressure inside and outside structure simultaneously, prevents groundwater infiltration and sewage exosmosis, and the waterstop effect is strong, protects underground environment, and is suitable for complex waterproof scene.

The invention relates to an embedded bar stiffener and a use method thereof. The embedded bar stiffener comprises a stiffener body, a plurality of small bags and a bag filling material, the reinforcing strip body is made of a fiber reinforced composite material; the small bags are located on the upper surface of the reinforcing strip body and evenly distributed in the length direction of the reinforcing strip body at intervals, closed cavities are formed in the small bags, and uneven indentations which are evenly distributed are arranged on the surface of the reinforcing strip body except the small bag areas. A cavity of the small bag is filled with the in-bag filling material, and the in-bag filling material is an efficient getter. The specific indentations are designed on the surface of the reinforcing strip body, so that the contact area and the mechanical occlusal force between the reinforcing strip body and the embedded steel bar glue are greatly increased, and the relative slippage between the glue and the reinforcing strip is effectively prevented. The small bag is slightly broken due to extrusion or colloid reaction heat, the getter is released, residual moisture and air in the hole and bubbles generated by curing can be actively and rapidly absorbed, and the hidden danger of interface bonding failure caused by hollowing and moisture is fundamentally eliminated.

The invention relates to the technical field of building materials, in particular to a coupling coarse aggregate and a preparation method and application thereof.The coupling coarse aggregate takes waste tempered glass particles with the particle size of 5-40 mm as an inner core, the inner core is coated with a red mud-based cementing material layer with the thickness of 1-5 mm, and the coating layer is composed of, by weight, 70-80 parts of red mud, 10-15 parts of fly ash and 5-20 parts of cement. The preparation method comprises the following steps: crushing and screening waste toughened glass, preparing red-mud-based gel slurry, coating the surfaces of glass particles with the red-mud-based gel slurry in a dip-coating or roll-coating manner, and carrying out standard curing for 28 days to obtain the coupling coarse aggregate. The aggregate can replace natural coarse aggregate to prepare large-dosage red mud-based concrete, wherein a cementing material comprises red mud, mineral powder, ardealite and cement. According to the invention, the alkali-silicon reaction is effectively blocked through the core-shell structure, and the aggregate-matrix interface performance is improved, so that the concrete has high compressive strength, excellent durability and low expansion rate, meanwhile, the synergistic resource utilization of bulk solid wastes of the red mud and the waste toughened glass is realized, and the concrete has remarkable environmental protection and economic benefits.

The invention discloses a preparation process of high-performance concrete and application of the high-performance concrete in a building structure. The high-performance concrete is prepared from the following components in parts by weight: 330 to 350 parts of cement, 70 to 80 parts of fly ash, 90 to 100 parts of slag powder, 2 to 3 parts of a water reducing agent, 550 to 600 parts of fine aggregate, 850 to 900 parts of coarse aggregate, 20 to 50 parts of a fiber material, 20 to 30 parts of a shrinkage reducing agent and 160 to 180 parts of water. By adjusting the proportion of all the components in the high-performance concrete, the prepared concrete has good compressive strength and breaking strength, cracks are not prone to being generated, and the application of the concrete in building structures is expanded.