Plug pin mechanism control system and crane

Abstract

The embodiment of the invention discloses a control method of a plug pin mechanism control system. The plug pin mechanism control system comprises a hydraulic oil tank, a hydraulic oil pump, a telescopic oil cylinder, a first reversing valve, an arm pin cylinder oil cylinder, a cylinder pin oil cylinder, a second reversing valve, a third reversing valve and a controller, wherein the hydraulic oil pump is connected with the hydraulic oil tank; a central passage and a central oil passage, which are communicated, are formed in the center of the telescopic oil cylinder; the first reversing valve is connected between the hydraulic oil pump and the central passage of the telescopic oil cylinder; the second reversing valve is connected between the arm pin cylinder oil cylinder and the central oil passage of the telescopic oil cylinder; the third reversing valve is connected between the cylinder pin oil cylinder and the central oil passage of the telescopic oil cylinder; the controller is in signal connection with the first reversing valve, the second reversing valve and the third reversing valve; and when the telescopic oil cylinder extends out, the controller sends a control signal to the first reversing valve at once so as to open the first reversing valve and hydraulic oil discharged by the hydraulic oil pump is filled into the central passage of the telescopic oil cylinder through the first reversing valve, so that the central passage of the telescopic oil cylinder is full of hydraulic oil.

Description

technical field [0001] The invention relates to a telescopic boom of a crane, in particular to a control method for controlling a control system of a plugging pin mechanism of a single-cylinder multi-section telescopic boom, and a crane controlled by the control method. Background technique [0002] At present, when the large-tonnage and super-large-tonnage truck cranes at home and abroad have more than five boom sections, most of them use single-cylinder bolt-type multi-section telescopic booms. Cooperate with the plug-in pin mechanism to control the plug-in and pull-out of the cylinder pin and the arm pin, so as to realize the extension or retraction of different boom sections. The single-cylinder bolt-type telescopic boom technology adopts single-cylinder, interlocking cylinder pin and arm pin, and precise length measurement electronic technology. Its advantages are the lightest weight and the least impact on the stability of the whole machine, but the technology is diffi...

AI Technical Summary

Problems solved by technology

Another technical solution is to use a hydraulic hose reel with a smaller diameter to supply oil independently to the cylinder pin and arm pin in the hydraulic system. Due to its small liquid capacity, it can also achieve quick response of the cylinder pin and arm pin, but It also adds additional equipment, cost and failure points

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