DEVICE FOR SEALING PIPELINE DURING REPAIR AND REPLACEMENT OF BALL VALVE Russian patent published in 2024 - IPC F16K43/00 F16L55/18 

FIELD: pipeline transport of oil and petroleum products.

SUBSTANCE: invention relates to auxiliary sealing devices for repairing and replacing ball valves. A device for sealing a pipeline during repair and replacement of a ball valve comprises a holding device, a rod and a sealing unit. The holding device is designed to be fastened to a pressure tapping boss welded to the pipeline and consists of removable upper clamping bar and fixing strip mounted on turnbuckles, and a split housing, which is designed to open for installation on the outer diameter of the pressure tapping boss and tightening by clamping cap nut to the bolt through the platform. Mounting plates for installing lanyards are installed on the split body by welding. The fixing strip is made of two parts mated with screws and comprises a locking screw. The upper clamping bar is installed in the upper part of the lanyards, and the fixing bar is installed in the middle part of the lanyards. The rod has a conical tip and comprises sealing elements in the form of main and reserve rubber rings installed between spacer bushings and located parallel to the rod axis. Nuts are installed on the rod axis to rotate the rod. The tip has a threaded hole with a length that ensures compression of the rubber rings due to the rotation of the rod through the mentioned nuts and the pressure of the spacers. The sealing unit is made in the form of a stuffing box comprising a housing in which a stuffing box seal, a sealing sleeve and a Mayevsky pressure relief valve are installed.

EFFECT: reduced repair time of the ball valve, as well as possibility of replacing it without stopping and freeing the pipeline.

4 cl, 5 dwg