Manufacture of watertight cables by filling with sealant in pressure chamber with recycle of excess sealant

摘要

In the manufacture of watertight cables (9) by filling with sealant in a pressure chamber (8) wherein the sealant is pumped out of a storage tank (1) by means of a feed pump (5) driven by a speed-regulated motor (6) and the pressure in the chamber (8) is continuously measured (12) and kept constant by means of a governor (13) regulating the speed of the pump motor (6), the excess sealant escaping from the chamber (8) is guided into a collecting tank (11) equipped with a level switch (16) and sealant is fed from tank (11) back into the chamber (8) by means of a return pump (15) driven by a speed-regulated motor (14) switched on and off by the level switch (16). In addition the speed of the motor (14) driving the return pump (15) is likewise regulated by the governor (13).