6 results about "Screed" patented technology

A power unit is configured for use as part of a concrete screed and includes a frame and a powered drive. The frame includes a drive housing. The powered drive is operably supported by the drive housing and is configured to rotate a rotatable concrete forming drum. The powered drive includes an electric motor and a battery operably coupled to the electric motor and configured to power the electric motor. The powered drive includes a drive shaft drivingly connectable relative to the drum, with rotation of the drive shaft causing corresponding rotation of the drum.

The high-bearing-capacity pavement structure comprises a graded broken stone layer, a mortar layer is laid on the graded broken stone layer, a bonding layer is laid on the mortar layer, and an asphalt concrete overlay layer is laid on the bonding layer; a reinforcement cage is arranged in the bonding layer, outer ribs are arranged on the upper side and the lower side of the reinforcement cage, and the outer ribs extend into the mortar layer and the asphalt concrete overlay layer. The paving construction method of the high-bearing-capacity pavement structure comprises the following steps: 1) leveling a site and erecting a template; (2) paving a large-particle-size gravel layer; (3) paving a small-particle-size gravel layer; (4) rolling to form a graded broken stone layer; the construction method comprises the following steps of (1) paving cement mortar to form a gravel grouting layer, (2) mounting a reinforcement cage, (3) paving a bonding layer, (4) paving a bonding layer, and (5) paving cement mortar to form a gravel grouting layer, (6) mounting a reinforcement cage, (7) paving a mortar layer, (8) paving a bonding layer, and (9) paving an asphalt concrete overlay layer.By adopting the structure and the method, the pavement structure is optimized, the stability between layers of pavements is enhanced, the slippage risk of the pavement is reduced, and reliable environmental conditions are provided for normal operation of roads.

The invention discloses a mold for modular stamping and integration of annular flake powder metallurgy products. It includes an upper mold and a lower mold, the upper mold includes a base, the lower end of the base is fixed with a connecting column, the lower end of the connecting column is fixed with a punching head, and four mounting brackets are uniformly arranged around the base, Two pairs of mounting frames are formed opposite to each other, and a telescopic cylinder is respectively installed at the lower end of each mounting frame. The cylinder body of the telescopic cylinder is connected to the corresponding mounting frame through an elastic connection structure, so that the telescopic cylinder can move up and down. The piston of the telescopic cylinder A leveling head with a semi-circular cross-section is installed on the rod; a distance is left between the upper end surface of the leveling head and the lower end surface of the mounting frame; The blanking hole is located below the positioning hole and communicates with the positioning hole. The diameter of the positioning hole is equal to the outer diameter of the leveling head and the outer diameter of the workpiece. The diameter of the blanking hole is equal to that of the punching head. diameter of.