EP 0240672 B1 19890322 - DIGGING AND TRANSPORTING DEVICE OF A DRIVING APPARATUS FOR PIPELINES BEING OPERATED SUBTERRANEOUSLY
Title (en)
DIGGING AND TRANSPORTING DEVICE OF A DRIVING APPARATUS FOR PIPELINES BEING OPERATED SUBTERRANEOUSLY
Publication
Application
Priority
- DE 3607461 A 19860307
- DE 3701851 A 19870123
Abstract (en)
[origin: US4763954A] The invention relates to an excavator and conveyor for an underground jacking apparatus for pipelines having a preferably non-man-sized rated cross section, which is driven into the surrounding soil from a manhole and comprises a digging head and at least one follower, jacking the digging head, and thereafter introducing additional jacked lengths of pipe. Rotating in the end area of the digging head is a digging disc which is set into rotation by a shaft. The shaft is surrounded at a distance by a conveyor tube, the wall of which is compartmentalized with respect to its outer cylindrical jacket in the vicinity of the digging head. Conveyor means are provided in the conveyor tube for conveying the excavated material back to the manhole. Sluice means are also provided in the conveyor cross section between the shaft and the conveyor tube wall, these sluice means serving to prevent incursions of groundwater. The sluice means comprise at least one annular bellows that can be expanded by means of a flowable medium; the shaft extends all the way through the bellows, and the conveyor cross section is closed completely or partially by the bellows depending on the required compartmentalization and on the extent of expansion.
IPC 1-7
IPC 8 full level
E21B 7/20 (2006.01); E21B 21/10 (2006.01); E21B 33/124 (2006.01)
CPC (source: EP US)
E21B 7/201 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0240672 A1 19871014; EP 0240672 B1 19890322; DE 3760078 D1 19890427; US 4763954 A 19880816
DOCDB simple family (application)
EP 87101967 A 19870212; DE 3760078 T 19870212; US 2108087 A 19870303