초록 ▼

A device (1) for passing through pipes in the form of a pig (1) moving through the pipe and guided on the inner wall thereof has at least one pig body (16) and support elements (8a) on the outer periphery thereof for guidance within the pipe as well as drive elements (10a, 10b) in the form of collar

A device (1) for passing through pipes in the form of a pig (1) moving through the pipe and guided on the inner wall thereof has at least one pig body (16) and support elements (8a) on the outer periphery thereof for guidance within the pipe as well as drive elements (10a, 10b) in the form of collars for transport in the pipe. The device is distinguished by improved entrance into the pipe conduit in that at least one of the collars (10a, 10b) can be radially expanded.

대표청구항 ▼

1. A device for passing through pipes in the form of a pig moving through the pipe and guided on an inner pipe wall, the device comprising:a pig body; support elements disclosed on a periphery of said pig body for guidance in the pipe; at least one seal member mounted to said pig body for advancemen

1. A device for passing through pipes in the form of a pig moving through the pipe and guided on an inner pipe wall, the device comprising:a pig body; support elements disclosed on a periphery of said pig body for guidance in the pipe; at least one seal member mounted to said pig body for advancement of the pig through the pipe; and means for radially expanding said seal member when said pig body passes from a first pipe having a first standardized diameter into a second pipe having a second standardized diameter substantially larger than said first standardized diameter, wherein said radially expanded seal member has a plate-like shape and seats on an inner wall of said second pipe to drive the device in response to forces exercised on said seal member by a fluid medium transported through said second pipe.