Patent ID: 6901966

Claim:
A seal device for a tubular member provided with a single cylindrical seal tube to be inserted into a passage such as a tubular member, in which the seal tube is expanded toward an outer periphery by injecting a fluid into the seal tube, for use in sealing an inside of the passage such as a tubular member, the seal device for a tubular member comprising: the seal tube having openings at a fore end and a rear end thereof; first and second base members to be inserted to the fore end and the rear end of the seal tube, so as to tightly seal an inside of the seal tube; a fluid injection passage disposed in such a manner as to communicate with the inside of the seal tube through the second base member; a discharge pipe inserted through the seal tube and communicating with an outside of the seal tube through the first and second base members; and a switch valve for opening and closing the discharge pipe; wherein the first base member has a guide, the guide being formed into a tapered shaped projecting from a tip of the seal tube and gradually increasing in outer diameter from a tip portion of the guide toward a base end portion of the guide at a seal tube side thereof and being configured so as to be replaced, whereby the guide can be replaced with another guide having a maximum outer diameter according to an inner diameter of the fluid passage such as a tubular member.