초록 ▼

This invention relates to load-lifting machinery and can find utility when applied to pipe laying cranes made use of in constructing large-diameter pipings. The pipe laying crane of the invention comprises the undercarriage carrying the framework with the engine and transmission, and mounted equipme

This invention relates to load-lifting machinery and can find utility when applied to pipe laying cranes made use of in constructing large-diameter pipings. The pipe laying crane of the invention comprises the undercarriage carrying the framework with the engine and transmission, and mounted equipment. The mounted equipment incorporates the loading boom with a pipe hanger, the counterweight and the hoist which is connected to the loading boom and to the pipe hanger through a system of tackles. The undercarriage is made sectionalized i.e., it is composed of the two track bogies arranged on both sides of the framework, one of said bogies carrying the loading boom. The latter bogie is connected to the other bogie with a possibility of setting motion in the direction square with the frame axis for changing the track gauge of the undercarriage. Besides, the output unit of the transmission that imparts torque to the boom-carrying bogie, is made extensible. Such a pipe laying crane, while in working position (i.e., with the boom-carrying bogie extended), has a greater load-lifting capacity than the prior-art cranes of the same weight, whereas when in the position with the minimized track gauge between the bogies, the crane is transportable by rail or on trailers with its undercarriage in the assembled state.

대표청구항 ▼

A pipe laying crane, comprising: a framework carrying an engine and a transmission and having a longitudinal axis; an undercarriage mounting said framework and made sectionalized from two track bogies arranged on both sides of said framework, one of said two track bogies being connected to the other

A pipe laying crane, comprising: a framework carrying an engine and a transmission and having a longitudinal axis; an undercarriage mounting said framework and made sectionalized from two track bogies arranged on both sides of said framework, one of said two track bogies being connected to the other with a possibility of setting motion with respect thereto in a direction perpendicular to the longitudinal axis of said framework so as to change the track gauge of said undercarriage the other of said two track bogies being fixed relative to said framework; articulated links interconnecting said bogies; and mounted equipment, comprising: a loading boom cantilevermounted on said one of said two track bogies of said undercarriage and a hanger carried by said loading boom for gripping the pipe being handled, a counterweight cantilever-mounted on the other of said two track bogies of said undercarriage, a hoist mounted on said other of said two track bogies, and a system of tackles interlinking said hoist, said articulated links, said loading boom and said hanger for controlling the angle of the boom at any relative position of said bogie; said transmission having an extensible output unit adapted to transfer torque to said one of said two track bogies of said undercarriage.