Double-hoist portal crane

Abstract

The invention disclose a double-hoist portal crane. The double-hoist portal crane comprises a hoisting main beam, the hoisting main beam is composed of a second hoisting beam plate and two first hoisting beam plates symmetrically installed at the two ends of the second hoisting beam plate, hoisting mechanisms are arranged on the two first hoisting beam plates, a driving part and a hoisting auxiliary beam are arranged inside the second hoisting beam plate, the driving part is located on one side of the hoisting auxiliary beam, baffles are arranged at the positions, close to the upper end and the lower end, of one side of the second hoisting beam plate correspondingly, one end, away from the driving part, of the hoisting auxiliary beam extends out of the baffles, the hoisting auxiliary beam is composed of a third hoisting beam plate and a fourth hoisting beam plate, the third hoisting beam plate is located at the upper end of the fourth hoisting beam plate, and first sliding grooves matched with the third hoisting beam plate are formed in the two end of the second hoisting beam plate correspondingly. The crane can operate within the range of a first span and a second span, and the problems that a conventional portal crane can only operate within one span during operation, and the operation range is small are solved.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to a double hoist gantry crane. Background technique [0002] Crane refers to the hoisting machinery that lifts vertically and carries heavy objects horizontally within a certain range. The hoisting machinery used in bridge construction projects can generally be divided into light and small hoisting equipment, bridge type hoisting machinery, jib type cranes, and cable cranes according to their structure and performance. Light and small lifting equipment such as: jack, pneumatic hoist, electric hoist, balance hoist (also known as balance crane), hoist, etc. Bridge type hoisting machinery such as beam cranes, etc. Jib type cranes such as stationary slewing cranes, tower cranes, truck cranes, tire cranes, crawler cranes, etc. Cable cranes such as lifts, etc. Among them, the gantry crane, also known as the gantry crane, is a deformation of the bridge crane. It can walk directly on t...

AI Technical Summary

Problems solved by technology

[0004] The hoisting mechanism in the present invention can make linear reciprocating motions along the first span of the lifting main girder, and can make linear reciprocating motions along the second span of the lifting sub-beam, which increases the scope of article transportation and solves the problem of conventional The gantry crane can only be carried out in one span, the site utilization rate is low, and the working range is small

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