首页>
外国专利>
Tunnel lining concrete pump - has telescopic delivery tube with multiple section sealing arrangement at sliding joint region
Tunnel lining concrete pump - has telescopic delivery tube with multiple section sealing arrangement at sliding joint region
展开▼
机译:隧道衬砌混凝土泵-在伸缩缝区域具有伸缩式输送管,并具有多段密封装置
展开▼
页面导航
摘要
著录项
相似文献
摘要
The system for depositing wet concrete behind a tunnel lining, in mining and tunnelling operations, uses equipment which includes a concrete pump which forces the concrete along a line to a telescopic tube (28, 29). The delivery end of this tube then fits inside a connecting sleeve (4) attaching to the tunnel lining. The region of the sliding joint between the two tubes incorporates a sealing arrangement which prevents the cement from being forced ino the joint. The inner tube (29) carries annular strip guides (33, 37) between which locate two sealing rings (43, 44) with a gap between. These are retained by braking rings (32, 47) which fit into grooves in the inner pipe. An intermediate sleeve (34) fits between the sealing rings and the outer tube (28), and an intermediate seal (45) fits between the innermost locking ring (47) and the innermost annular strip guide (37).
展开▼