32results about How to "Simple and economical construction" patented technology

The invention provides a stretch-draw forming composite structure arch bridge and a building method thereof. The arch bridge comprises at least two lower strings (2), at least two upper strings (4), a set of flying shores (5), a set of web members (1) and a set of beams (3), wherein the lower strings (2) are straight and parallel to each other, the upper strings (4) upwards arch and are parallel to each other, the flying shores (5) are transversely connected between the two adjacent upper strings, the web members (1) are connected between the upper strings and the lower strings of the same sides, the beams (3) are connected between the two adjacent lower strings; a plane bridge floor system is jointly constituted by the lower strings and the beams, each lower string is formed by splicing a set of lower string pipes (2b) penetrating on a lower string steel cable (2a) in sequence, and the adjacent lower string pipes are connected through flange bolts; and each upper string is formed by welding upper string pipes (4a) in sequence, the bottoms of the two ends of the spliced upper string pipes are welded to the two ends of the spliced lower string pipes correspondingly, and the spliced lower string pipes and upper string pipes are grouted with micro-expansive mortar or concrete. According to the stretch-draw forming composite structure arch bridge and the building method thereof, the construction forming state and the operating loading state can be integrated into a whole in arch bridge building, and construction is rapid, easy and economic.

This paper describes a winding device for wrapping material around a flat core rotating about an axis of rotation which in turn follows a circular trajectory, controlling the rotation of the core about its axis and the orientation of its axis of rotation The law of motion of both circular trajectories (independently driven by motors via electric cams) to counteract the position and velocity changes of the material at the core inlet. The winding device is used to manufacture an electrical energy storage device.

Dampening device (1) for a Dozer blade (10) and related earthwork equipment (100); the blade (10) being carried by a frame (102) of the equipment (100) through the interposition of an actuating unit (106) suitable to adjust the vertical position of the blade (10); an axial-symmetrical member (11) being carried by the frame (102) to dampen oscillations associated, in use, to the forward movement of the blade (10).