| 摘要 |
PROBLEM TO BE SOLVED: To effectively absorb energy of high pressure fluid and to suppress noise and cavitation by providing a cage body with a plurality of independent communicating holes, providing a path within a cylindrical surface concentric with a shaft of the cage body while the communicating holes pass through the cage body and imparting much refractions to the routes of the communicating holes. SOLUTION: A valve seat 3 is set in a valve box 1, a cage body 5 is inserted, the cage body 5 is fixed by a cage body presser 6, a valve element 4 is inserted, a valve cover 2 is covered and a high differential pressure valve is assembled. By sliding, elevating and lowering the valve element 4 on an inner wall of the cage body 5 and changing opening hole area of communicating holes 10 of the cage body 5, flow rate of high pressure fluid is regulated. A refraction groove is formed at a location corresponding to a through-hole of a cylindrical body to an outermost surface layer on the surface of the cylindrical body to be a core constituting the cage body 5. The same refraction groove and through-hole are formed also on the surface of the cylindrical body of an innermost layer. By constituting the cage body 5 by the plurality of cylindrical bodies, forming refraction routes on the surfaces of the cylindrical bodies and joining the cylindrical bodies, energy of high pressure fluid can effectively be absorbed. |
