HYDRAULIC CONTROL VALVE OF HEAVY EQUIPMENT

摘要

PURPOSE: A hydraulic control valve for heavy equipment is provided to improve the efficiency of work by assembling a regeneration valve with the hydraulic control valve or disassembling the regeneration valve from the hydraulic control valve after a regeneration valve is coupled. CONSTITUTION: A hydraulic control valve for heavy equipment comprises a valve body(3), a spool(7), and a regeneration valve. A feed path, first and second port(4), tank cask, and a first regeneration path are formed in the valve body. The spool is coupled with a valve body. The spool controls the working fluid flow provided from the feed path to an actuator. A second regeneration path(15) is formed inside the spool. The regeneration valve is installed between the first regeneration path and the tank path. The regeneration valve comprises a piston(21), a return channel, a spool sleeve, a regeneration spool(22), an elastic support apparatus, a pilot piston(25), and a guide(38).