PIPE CLAMP APPARATUS AND HYDRAULIC TESTER

摘要

Provided is a pipe clamp apparatus (50) which is small in size and simple in structure and is suitable for a hydraulic tester for testing a quality of a seam welded pipe. According to the present invention, an elevating base (52) which comprises a pipe support body (55) at an upper portion is installed on a fixed base (51) in an elevatable manner. Clamp chucks (56) are installed in a rotatable manner at a position where the pipe support body (55) of the elevating base (52) is inserted. A chuck driving member (58) performing an elevation movement independently of the elevating base (52) is installed in the elevating base (52). Both side portions of the chuck driving member (58) are connected to the clamp chucks (56) at both sides via a link (59) so that the clamp chucks (56) at both sides rotate in a closing direction due to a relative drop against the elevating base (52). A first driving unit (53) which elevates the elevating base (52) and a second driving body (54) which elevates the chuck driving member (58) are installed together at the fixed base (51). Since a drop stroke of the chuck driving member (58) required for a closing operation of the clump chuck (56) is borne in part by an elevation of the elevating base (52) entailed by a pipe transfer, the drop stroke of the chuck driving member (58) for opening and closing the clamp chuck (56) is limited to a low level.