摘要:
The pipe scraper (10) comprises: a pipe carrier means (14) on which the pipe (13) to be scraped rests; a scraper means (15) comprising both a scraper head (34) provided with at least one scraper blade (36), and a guide means (46) intended to rest on the outer surface of the pipe (13) and which causes the scraper blade (36) to follow this outer surface, in order to scrape it, along a cylindrical helical path coaxial with the pipe (13); a support means (12) which carries both the pipe carrier means (14) and the scraper means (15) such that the distance between the two can be varied. Means (46, 49, 50, 51, 52) are provided to vary the pitch of said helical path.
摘要:
The pipe pressing tongs (10) comprise two symmetrical hinged arms (12, 14), each having one end shaped as a jaw (24, 26) extending through an angle of about 120 degrees, the two jaws (24, 26) being closed by widening-apart the other ends (20, 22) of the two arms (12, 14), a third jaw (32) with an angular extension such as to complete the round angle being interposed between the first two jaws (24, 26). The third jaw (32) is closer to the hinging axes (28, 30) of the two arms (12, 14) of the tongs (10) than the first two jaws (12, 14) and is disposed coaxially to the tongs (10). Means (36, 40) are provided to forcibly advance the third jaw (32) from a retracted position to a position in which the third jaw (32) blends with the first two jaws (24, 26) following closure of the tongs (10).
摘要:
A conventional swaging gripper (90) with two jaws (92) can be applied to the device (82) for swaging metal pipes (100). The closure movement of the jaws (92) which squeeze the pipe (100) is achieved by a hydraulic transmission comprising: a cylinder (44) within which a rod (52) is movable in both directions, one end of the rod emerging from the cylinder (44) through a suitable sealed aperture and to its other end there being coaxially fixed a sealed piston (54) which divides the interior of the cylinder (44) into a first chamber (42) and a second chamber (58) both containing an incompressible liquid, the outer end of the rod carrying means (80) for opening the jaws (92) of the pipe swaging gripper (90), applicable to the pipe swaging device (82), as a result of volume increase of the first chamber (42); a reservoir (34) also containing said incompressible liquid, the reservoir shell having a part (74) deformable elastically within a predetermined range as a result of variation in the liquid quantity within the reservoir (34); a plunger pump (30) to withdraw the liquid contained in the reservoir (34) and to feed it under pressure into the first chamber (42) of the cylinder (44) via a first conduit (36, 46, 48); a second conduit (72) which connects the second chamber (58) of the cylinder (44) to the reservoir (34); a third conduit (53) which connects the first chamber (42) to the reservoir (34) by by-passing the pump (30); manually operable shut-off means (51, 49) provided in the third conduit (53); and elastic return means (55) for returning the rod (52) into the position corresponding to minimum volume of the first chamber (42) of the cylinder (44) when the shut-off means (51, 49) in the third conduit (53) are open.
摘要:
Hand operable hydraulic transmission tube bending device whose matrix-die holding bar (1) is moved by a fluid (oil) through a hydraulic pump. The reservoir (11) of the fluid is formed directly in the arm (14), on which the support (15) of counterdies (16) is installed, one of the walls of said reservoir being sealingly deformable. The pump, the conduits, the reservoir and the chamber in which the matrix-die holding bar slides form a closed circuit, the fluid arriving from the pump to the head (3) of the matrix-die holding bar through a conduit that is formed in the fixed part of the handle and which builds up the outer part of the handle (7) and is concentric with the cylinder (5) in which said bar slides.
摘要:
Hand operable hydraulic transmission tube bending device whose matrix-die holding bar (1) is moved by a fluid (oil) through a hydraulic pump. The reservoir (11) of the fluid is formed directly in the arm (14), on which the support (15) of counterdies (16) is installed, one of the walls of said reservoir being sealingly deformable. The pump, the conduits, the reservoir and the chamber in which the matrix-die holding bar slides form a closed circuit, the fluid arriving from the pump to the head (3) of the matrix-die holding bar through a conduit that is formed in the fixed part of the handle and which builds up the outer part of the handle (7) and is concentric with the cylinder (5) in which said bar slides.