Concrete pipe sealing apparatus and method

Details Concrete pipe sealing apparatus and method Concrete pipe sealing apparatus and method

B - Operations, Transporting

28

B

25/5

B28B 21/94 (2006.01)

Patent

CA 1211620

ABSTRACT OF THE DISCLOSURE An apparatus and method for sealing the wall of a concrete pipe. The apparatus includes a frame having two longitudinally-opposed slidable carriages mounted at the horizontal top portion of the frame. Both carriages support two axially-aligned longitudinal and inwardly-extending cylindrical insertion members of a diameter slightly less than the inside diameter of the pipe. These members are movable by their respective carriage into the axial bore of the concrete pipe, sealing the same at both its ends. One of the insertion members is provided with a tube communicating with the sealed axial bore at one end and with a source of pressurized sealing fluid at its other end. The concrete pipe is first closed by the insertion members, then sealed with sealing fluid fed under pres- sure in the annular zone defined between the pipe and insertion members.

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