Apparatus for lining an inside wall of a sewer pipe
AssigneeWerner & Pfleiderer
InventorKlaus-Jurgen Hinger
Life of this patent
Estimating the term…
Abstract
An extruder drivable for displacement by moving devices is provided for sewer pipe reconstruction and has a radial nozzle applying by extrusion a thermoplastic tube to the inside wall of a sewer pipe to be reconstructed. The thermoplastic tube is pressed against the inside wall by pressurized air and cooled down to form a lining pipe.
Claims18
An apparatus for lining an inside wall (7) of a sewer pipe (8), wherein an extruder (1) with a central longitudinal axis (12) is provided, which extruder (1) fits inside said sewer pipe (8), is moved therealong in an operation direction (4) by means of a feed unit (9) operatively connected thereto and has a nozzle (11) radially directed with respect to said central longitudinal axis (12), which nozzle (11) is connected to the extruder by a channel for molten plastics and includes means for extrusion of a plastic tube (58), and wherein at least one hot-air nozzle (85) is directed outwardly of said apparatus to direct air towards the inside wall (7) of the sewer pipe (8), which hot-air nozzle (85) is arranged upstream of said nozzle (11).
An apparatus for lining an inside wall (7) of a sewer pipe (8), wherein an extruder (1) with a central longitudinal axis (12) is provided, which extruder (1) fits inside said sewer pipe (8), is moved therealong in an operation direction (4) by means of a feed unit (9) operatively connected thereto and has a nozzle (11) radially directed with respect to said central longitudinal axis (12), which nozzle (11) is connected to the extruder (1) by a channel for molten plastics and includes means for extrusion of a plastic tube (58) and wherein at least one radial pipe molding and cooling nozzle (53) is arranged downstream of the nozzle (11), which pipe molding and cooling nozzle (53) is directed to an inside of said plastic tube (58) formed by said apparatus to charge said inside with a high pressure cooling medium.
Dependencies are inferred from the claim text.