Improved double block and bleed plug

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

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Details

F16L 55/134 (2006.01) F16L 55/11 (2006.01) F16L 55/12 (2006.01) F16L 55/128 (2006.01) F17D 5/00 (2006.01)

Patent

CA 2740868

A pipe plug includes two or more pivotally connected plugging heads that work in combination to double block and bleed a pipe. At least one of the plugging heads has an expandable sealing element that is in communication with an inflation source. The sealing element may be an inflatable sealing element or a compression packer sealing element. A passageway-sections of which may pass through the pivotal connection and into the plugging head-carries the inflation medium from the source to the sealing element. A bleed port passageway is also provided that passes through the plugging head. The leading plugging head may include a cleaning element for sweeping away debris ahead of the plug. The plugging heads may also include a skid plate that slideably engages the interior surface of the pipe to properly orient the plugging heads within the pipe.

La présente invention concerne un bouchon de conduite comportant au moins deux têtes dobturation connectés en pivotement qui fonctionnement en combinaison pour le double blocage et purge dune conduite. Au moins une des têtes dobturation comprend un élément détanchéité dilatable qui est en communication avec une source de gonflage. Lélément détanchéité peut être un élément détanchéité gonflable ou un élément détanchéité de garniture à compression. Un passage dont des sections peuvent traverser la connexion pivotante pour pénétrer dans les têtes dobturation transporte lagent de gonflage depuis la source jusquà lélément détanchéité. Un passage dorifice de purge est également prévu qui travers la tête dobturation. La tête dobturation avant peut comporter un élément de nettoyage pour balayer des débris à lavant du bouchon. Les têtes dobturation peuvent également comporter une plaque de protection qui engage en coulissement la surface intérieure de la conduite pour lorientation correcte des têtes dobturation à lintérieur de la conduite.

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