Patent ID: 8356624
Filing Date: 2013-01-22
Classification: G05D,Y10T

Abstract:
1. A self-operated pressure transmission type of pressure reducing valve with corrugated pipe, comprising a valve body disposed with a valve seat, and a spool is disposed on the valve seat and connected to the lower end of a lower valve rod, said lower valve rod passes through and is disposed in a valve cover above the valve seat, the upper end of said lower valve rod is connected to an upper valve rod with a connecting member; said upper valve rod is movable up and down and supported by a housing, the upper end of said upper valve rod is connected to the upper end of said housing with a regulating nut and a spring, a pressure guiding pipe is connected between said housing and the valve seat; wherein said housing comprises an upper cover, a cylinder and a lower cover, a lower housing inlet is connected to the side wall of the lower cover, an upper housing inlet is connected to the side wall of the upper cover or the side wall of the cylinder, the upper cover and the lower cover are respectively and hermetically connected to the upper and the lower ends of the cylinder, a sealing board is transversely disposed between the cylinder and the lower cover, the center of said sealing board has a through hole; a sealing sleeve is disposed in the cylinder, a corrugated pipe which bears high pressure is disposed outside of the sealing sleeve, the upper and lower ends of the corrugated pipe are respectively and hermetically connected to the sealing sleeve and the sealing board, a first nut for connecting the upper valve rod is fixed above the bottom of said sealing sleeve, and a second nut for connecting the lower valve rod is fixed beneath the bottom of said sealing sleeve; the lower valve rod is threadably connected to the second nut; the first nut is threadably connected to the lower end of a sealing nut of a sealing corrugated pipe of the upper valve rod; the sealing corrugated pipe of the upper valve rod is disposed between the sealing sleeve and the upper valve cover, the upper end of which is hermetically connected in the upper cover, the lower end of which is hermetically fixed to the sealing nut of the sealing corrugated pipe of the upper valve rod; said corrugated pipe which bears high pressure, sealing corrugated pipe of the upper valve rod, sealing sleeve and the cylinder are respectively coaxially disposed with the upper valve rod.