2results about How to "Adjustable span" patented technology

The invention discloses a concrete chiseling surface roughness measuring device and a measuring method thereof, and relates to the technical field of roughness measurement. The concrete chiseling surface roughness measuring device comprises a measuring instrument assembly, a track assembly, a traction assembly and a storage assembly. The track assembly is used for providing a stable moving track for the measuring instrument assembly, the traction assembly is used for providing constant-speed driving, the traction assembly is designed in an independent split mode, vibration of the traction assembly does not affect the track assembly and the measuring instrument assembly, interference of external factors on the measuring process of the measuring instrument assembly is reduced, and the measuring accuracy of the measuring instrument assembly is improved. Meanwhile, the measuring instrument assembly can conduct two sets of same-track detection at the same time, the accuracy of detection data is further improved through mutual comparison, compared with direct hand-held roughness instrument movement detection, the accuracy is higher, the device can meet detection of concrete faces at different angles, adaptability is high, and all the parts are detachable or foldable and convenient to carry.

The application provides a synchronous hoisting mechanism of a special machine for repairing a sealing weld, which comprises a plurality of clamping modules for being fixed on a scaffold platform, a hoisting frame and a synchronous hoisting module installed on the hoisting frame, the scaffold platform is arranged above a control rod drive mechanism to be repaired, the clamping module comprises a supporting leg fixing seat, the hoisting frame comprises a plurality of supporting legs and a supporting beam, the number of the supporting legs is the same as that of the supporting leg fixing seats, the lower ends of all the supporting legs are connected to all the supporting leg fixing seats one by one, the upper ends of the supporting legs are connected to the end portions of the supporting beam, the synchronous hoisting module comprises a fixing disc installed on the supporting beam, a plurality of groups of fixed pulley sets installed on the fixing disc and a plurality of groups of movable pulley sets connected to all the fixed pulley sets through pull ropes, and a lifting hook for being connected to a lifting opening of the special machine for repairing a sealing weld is installed on each group of the movable pulley sets. The synchronous hoisting mechanism can realize stable hoisting of the special machine.