INRICHTING VOOR HET INVOEREN EN VERWIJDEREN VAN BOLLEN IN OF UIT EEN PIJPLEIDING.

摘要

Sphere handling apparatus for use with pipe lines carrying fluid under pressure and serving to introduce or remove a sphere or other clean-out device. It makes use of an inclined hollow body connected to the line and adapted to contain a sphere. The interior of the body is divided into two spaces that are separated by a closure movable by power means between closed and open positions for enabling the two spaces to be sealed with respect to each other or to be placed in communication to enable a sphere to move from one space to the other. The closure is sealed with respect to a sleeve that forms a part of the body and is disposed intermediate the two spaces. Preferably bypass means is provided to enable an operator to connect the two spaces for pressure equalization. Also means is provided for detecting leakage past the closure. Preferably the sealing means between the closure and the sleeve is of the double resilient cup type. One embodiment is used for launching and another for retrieving spheres.