2results about How to "Achieve pre-positioning" patented technology

The utility model discloses a kind of fabricated building PC components. Including upper component and lower component, adjacent upper and lower component are connected by bolt. Upper component two ends are equipped with first lug and second groove, lower component end portion is equipped with second lug and first groove, and first lug and first groove, second lug and second groove shape are matched, realize accurate pre-positioning;The surface of the second lug of lower component is equipped with embedded hole, embedded hole is equipped with embedded part containing embedded nut and compression spring, the second groove of upper component is equipped with through-hole, bolt is sequentially connected with embedded nut after passing through through-hole, compression spring is compressed and generates sustained pre-tightening force when tightening bolt. The utility model is embedded by lug and groove to realize quick positioning, and the bolt connection structure of spring pre-tightening is combined to improve connection firmness, effectively solve the problem that existing PC component connection positioning is poor and easy to loosen, convenient to install and suitable for fabricated building construction.

This utility model provides a ceramic wear-resistant elbow with a steel outer shell, comprising: a steel outer shell body, a base tube disposed on the steel outer shell body, and a ceramic sheet disposed on the inner side of the steel outer shell body; and a locking assembly disposed on the steel outer shell body, the locking assembly including an arc-shaped plate and a fixing ring, the arc-shaped plate being disposed on the ceramic sheet, the fixing ring being disposed on the inner side of the steel outer shell body, the fixing ring having a threaded post, and an arc-shaped groove being disposed on the inner side of the steel outer shell body, with a threaded hole disposed on the inner side of the arc-shaped groove. This utility model achieves fixation by aligning the arc-shaped plate on the ceramic sheet with the arc-shaped groove and sliding it in, then installing the fixing ring at both ends of the inner side of the steel outer shell body, and screwing the threaded post into the mounting hole. This two sets of fixing rings fix the position of the ceramic sheet, thus preventing the ceramic sheet from falling off during transportation.