公开(公告)号：EP2944829A4

公开(公告)日：2016-11-09

申请号：EP13898030

申请日：2013-12-25

申请人： JIANGSU HENGLI HYDRAULIC CO LTD

发明人： WANG LIPING ,  YUAN CAIFU ,  LU QIANG ,  CHEN ZHAN ,  LIU HONGGUANG

IPC分类号： F15B13/02 ,  F15B13/01 ,  F15B13/04

CPC分类号： E02F9/2225 ,  E02F9/2267 ,  F15B13/01 ,  F15B13/026 ,  F15B13/0405 ,  F15B2211/6052 ,  F16K1/307 ,  F16K1/526 ,  F16K15/18 ,  F16K31/1221 ,  Y10T137/7762 ,  Y10T137/7764 ,  Y10T137/7842

公开(公告)号：EP2944828A4

公开(公告)日：2016-11-02

申请号：EP13891811

申请日：2013-11-22

申请人： JIANGSU HENGLI HYDRAULIC CO LTD

发明人： WANG LIPING ,  LU QIANG ,  CHEN ZHAN ,  LIU HONGGUANG ,  ZHANG GUOLIANG

IPC分类号： F15B13/02

CPC分类号： F16K11/06 ,  F15B13/0403 ,  F16K11/0716 ,  Y10T137/86493 ,  Y10T137/86702

摘要： Disclosed is an energy-recycling hydraulic control main valve, which is provided with end covers, a valve core, a left one-way valve and a right one-way valve, ; the left one-way valve is composed of a left valve seat, a left cone valve core and a left spring; a conical surface of the left cone valve core is closely attached to a left conical surface of the valve core by the spring force; the right one-way valve is composed of a right valve seat, a right cone valve core and a right spring; and a conical surface of the right cone valve core is closely attached to a right conical surface of the valve core by spring force. The hydraulic main control valve can not only limit the falling speed of a piston, but use the potential energy generated by the gravity action on the piston, thereby achieving energy recycling.