Flexible leg installing structure for double-beam portal crane

Abstract

The invention discloses a flexible leg installing structure for a double-beam portal crane. The flexible leg installing structure comprises a flexible support leg body, and the flexible support leg body and a rigid support leg are arranged in a pair; the two sides of the flexible support leg body is provided with two inverse U-shaped supporting frames, and two main beams between the rigid support leg and the flexible support leg body are respectively fixed on left and right inner sides of the lower parts of the supporting frames; a vertical beam, which is perpendicular to an upper beam, is arranged below the upper beam of the two supporting frames, and a flexible hinging device is arranged between the vertical beam and a top beam of the flexible support leg body. The flexible leg installing structure provided by the invention has the advantages that the long span double-beam portal crane with double cantilevers only needs a rigid support leg and a flexible support leg, so that a problem that a long span double-beam portal crane with double cantilevers cannot be provided with a rigid support leg and a flexible support leg in the prior art is solved, the flexible leg installing structure is capable of bearing and defusing deflection, torsion and additional torque of a complete machine steel structure caused by negative factors such as large bending moment and large deviation, and the rail gnawing probability of a cart walking wheels is effectively reduced.

Description

[0001] technical field [0002] The invention relates to a component for a gantry crane, in particular to a flexible leg installation structure for a double-girder gantry crane, belonging to the technical field of hoisting machinery. Background technique [0003] Traditionally, when the crane has no cantilever or only has a single cantilever, and the span of the crane is greater than 38m, one of the two outriggers is usually rigidly connected to the main girder, which is called a rigid outrigger; The lower part of the connecting beam rests on another leg through a neoprene hinge support. This leg is usually called a flexible leg. The existing leg structure can only be used for For cantilever or gantry cranes with only single cantilever, when the span of the crane is greater than 38m and must be equipped with double cantilever, the existing scheme is no longer applicable. Contents of the invention [0004] The technical problem to be solved by the present invention is ...

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Problems solved by technology

[0003] Traditionally, when the crane has no cantilever or only has a single cantilever, and the span of the crane is greater than 38m, one of the two outriggers is usually rigidly connected to the main girder, which is called a rigid outrigger; The lower part of the connecting beam rests on another leg through a neoprene hinge support. This leg is usually called a flexible leg. The existing leg structure can only be used for For cantilever or gantry cranes with only single cantilever, when the span of the crane is greater than 38m and must have double cantilever, the existing scheme is no longer applicable

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