Get-off multi-way valve for lorry-mounted crane and get-off control system

Abstract

The invention belongs to the technical field of lorry-mounted crane hydraulic control and particularly relates to a get-off multi-way valve for a lorry-mounted crane and a get-off control system. A work valve, a hydraulic control one-way valve and a selecting valve are included; the work valve is connected with the selecting valve; the selecting valve is connected with a two-way hydraulic lock; the work valve is further connected with the hydraulic control one-way valve; the work valve is a three-position six-way reversing valve; and the selecting valve is a three-position four-way reversing valve. The selecting valve is connected with supporting leg oil cylinders and a horizontal oil cylinder, and the two-way hydraulic lock is further arranged between the selecting valve and the supporting leg oil cylinders; and the supporting leg oil cylinders and the horizontal oil cylinder are further connected with the work valve. A valve body of the get-off multi-way valve for the lorry-mounted crane is optimized, a large flow switching valve is independently arranged in a get-off system, and is used for get-on and get-off system switching, get-on large flow oil supplying is reasonably allocated, get-off small flow control is achieved, energy consumption is reduced, and the get-off system performance is improved.

Description

technical field [0001] The invention belongs to the technical field of hydraulic control of truck-mounted cranes, and in particular relates to a multi-way valve for getting off the truck and a control system for getting off the truck. Background technique [0002] The truck-mounted crane is a new type of high-efficiency lifting and transportation equipment that is mounted on the chassis and integrates lifting and transportation. Its working principle is to drive the hydraulic oil pump to rotate through the transmission of the car, and provide high-pressure oil to each hydraulic working component, so as to realize various movements of the truck-mounted crane. Truck-mounted cranes are recognized and accepted by users for their advantages of fast, flexible, efficient, convenient, and the combination of loading, unloading, and transportation. They are widely used in cargo handling and Transfer cargo at close range. [0003] The truck-mounted crane is generally divided into the...

AI Technical Summary

Problems solved by technology

Most of the existing alighting multi-way valve bodies are single-flow valve bodies, and the flow rate of the valve body is low. In view of the situation that the boarding system requires a large flow rate, when the oil flows through the alighting multi-way valve to supply oil to the boarding system, The valve body of getting off the car will cause throttling loss, and the system will heat up when working for a long time

The alighting control system only sets the main overflow pressure according to the whole machine, and cannot optimize the pressure of the alighting system. At the same time, because the alighting control system is shared by all the small chambers of the oil cylinders, when starting a certain oil cylinder, especially the horizontal cylinder, there will be certain pressure shock

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