2results about How to "Fast forward" patented technology

The utility model relates to the technical field of mixing pile construction, disclose a kind of mixing pile mud splashing prevention device including shielding subassembly and base;Shielding subassembly includes multiple shielding monomers, rotationally connected between adjacent shielding monomers, the shielding monomer for being connected to mixing pile drill rod in multiple shielding monomers one end, the shielding monomer connected to base in multiple shielding monomers other end.The utility model shielding monomer rotationally connected and two ends are connected drill rod and base, can closely adhere drill rod lifting track, angle is flexibly adjusted to reduce mud overflow, improve mud efficiency;Modular structure adapts to different drill rod specifications and construction conditions, solve the problem of traditional mudguard adaptation difference;Portable design and dismounting are convenient, can save construction manpower time cost, improve construction efficiency.

This invention discloses a flat-top gantry crane, relating to the field of crane technology. It includes a tower body, a gantry frame mounted at the lower end of the tower body, a slewing support mounted at the upper end of the tower body, a machine platform mounted at the upper end of the slewing support, a machine room mounted at the upper end of the machine platform, a boom mounted at the front end of the machine platform, a luffing device installed inside the boom, a second luffing wire rope and a first luffing wire rope mounted on the left and right sides of the luffing device respectively, a luffing trolley mounted at one end of the second luffing wire rope, the luffing trolley being slidably connected to the lower end of the boom, and one end of the first luffing wire rope being connected to the luffing trolley. A hook is mounted at the lower end of the luffing trolley via a hoisting wire rope. This invention, through a series of structural features, significantly reduces the luffing resistance of horizontal traction compared to a boom-tilting type, reduces the motor power of the luffing mechanism, and increases the luffing speed, thereby greatly improving work efficiency.