| 摘要 |
PURPOSE: Structure of a check valve is provided to prevent counter flow of fluid by forming a main damper and a sub damper in a unidirectional control valve, and to improve stiffness by forming a reinforcing member at the side of the damper. CONSTITUTION: A check valve is composed of a first housing(20) having a main inlet hole(22) protruded inward, plural sub inlet holes(24) formed around the main inlet hole, and outer and inner valve seats(23,25) formed in double inlet holes; a second housing(30) combined with the first housing by forming plural outlet holes(34) around a guide groove(32); a valve body(40) having a guide(42) inserted to the guide groove of the second housing, a spring supporting unit(44) supported elastically by a spring(43), and a valve containing part(46) inserting a valve(50); the valve having a sub damper(54) contacted to the inner valve seat to close the main inlet hole, and a main damper(52) contacted to the outer valve seat to shut off the sub inlet holes; and a metal reinforcing member(56) formed at the side of the main damper to improve the rigidity of the valve. The responsiveness of the valve is improved, and counter flow of fluid is prevented with the double damper structure. The volume of the check valve is reduced against the pressure of the valve.
|
