Apparatus for delivering resinous lining material to a pipeline

摘要

Apparatus for delivering a resinous lining to a pipeline (1 figure 1) comprises an injection head 2 with a nozzle 13 that is used to inject a mixed resin into an airstream and to deliver the mixed resin/air flow to a delivery hose (3 figure 1). The injection head comprises an air supply conduit 7 and a mixed resin supply line 16 wherein, mixed resin issuing from the supply line is injected into an air stream for delivery to the pipeline via the nozzle. A baffle 18, preferably in the form of a helical flight, is located within the air supply conduit. The baffle promotes turbulence within the airstream thereby preventing mixed resin remnants from sticking to and clogging the injection head. Advantageously, the mixed resin supply line is located, at least partially, within the air supply conduit. As the air stream within the conduit is temperature controlled, the airstream acts to keep the mixed resin within the supply line at an appropriate temperature for delivery from the injection head for application to the interior of the pipeline so that no additional external heating apparatus is required for the supply line.