초록 ▼

An apparatus for detecting leaks in a joint between a tube sheet and a tube end fitted into an opening in the sheet comprising a barrel having a near end adjacent one side of said sheet; sealing means between said near end and said face, said sealing means surrounding said joint, a draw rod axially

An apparatus for detecting leaks in a joint between a tube sheet and a tube end fitted into an opening in the sheet comprising a barrel having a near end adjacent one side of said sheet; sealing means between said near end and said face, said sealing means surrounding said joint, a draw rod axially mounted in said barrel for reciprocal motion toward and away from said sheet, one end of said rod adapted to project into said tube, means for reciprocating said rod, a radially expandable plug adjacent said one end, the end of said rod being spaced from plug, resilient means between the end of said rod and said plug, means for expanding said plug radially when said rod is moved in a first direction away from said sheet, a chamber in said barrel adjacent said near end, means for introducing vacuum or pressure into said chamber, a gauge in communication with said chamber whereby the pressure in said chamber can be measured, means for isolating said chamber from the source of said vacuum or pressure.

대표청구항 ▼

A device for detecting leaks in a joint between a tube sheet and a tube end fitted into an opening in said sheet comprising a barrel having a near end adjacent one side of said sheet; sealing means between said near end and said face, said sealing means surrounding said joint, a draw rod axially mou

A device for detecting leaks in a joint between a tube sheet and a tube end fitted into an opening in said sheet comprising a barrel having a near end adjacent one side of said sheet; sealing means between said near end and said face, said sealing means surrounding said joint, a draw rod axially mounted in said barrel for reciprocal motion toward and away from said sheet, one end of said rod adapted to project into said tube, means for reciprocating said rod, a radially expandable plug adjacent said one end, and resilient means mounted between said plug and said one end of said rod, means for expanding said plug radially when said rod is moved in a first direction away from said sheet, said rod being movable in said first direction against said resilient means after said plug has expanded, to urge the barrel against said tube sheet, a chamber in said barrel adjacent said near end, means for introducing vacuum or pressure into said chamber, a gauge in communication with said chamber whereby the pressure in said chamber can be measured, means for isolating said chamber from the source of said vacuum or pressure.