| 摘要 |
Pressure reducers are disclosed that, in some embodiments, are designed for use in a pressurized pipe line to provide variable resistance to flow of process fluid, such as steam or water, with no moving parts. The pressure reducers have an elongate outer shell and an inner sleeve spaced radially inwardly from the outer shell. The outer shell is defined by an outer annular wall having an open end and an end wall opposite the open end. The inner sleeve and the outer shell are connected near the open end. The inner sleeve defines a passageway that extends into a cavity defined by the outer shell and has an outlet that is spaced from the end wall. The outer annular wall and the end wall are perforated by a plurality of flow holes extending therethrough, and the sleeve is preferably not perforated. |
| 主权项 |
1. A pressure reducer for a pressurized pipeline, comprising:
an outer shell having an annular sidewall and an end wall, the annular sidewall defining an interior space, a first end, and a second end, the first end defining an opening into the interior space, the annular sidewall having a first length from the first end to the second end, and the end wall disposed across the second end; an annular sleeve extending into the interior space from the first end of the annular sidewall, the annular sleeve having a fluid impenetrable sidewall, an inlet connected with the first end of the annular sidewall, an outlet disposed distal to the inlet within the interior space and spaced from the end wall, and a passageway extending from the inlet to the outlet, the annular sleeve extending into the interior space a second length, wherein the second length is less than the first length; an annular gap surrounding the annular sleeve, the annular gap disposed between the annular sidewall and the annular sleeve; a second gap between the end wall and the outlet of the annular sleeve; a first set of apertures through the end wall; and a second set of apertures through the annular sidewall, wherein at least a first one of the second set of apertures is located opposite the annular sleeve along the second length, wherein the annular sleeve is arranged to force fluid flowing through the pressure reducer to flow through the outlet of the annular sleeve, without flowing through the sidewall, before flowing through the outer shell. |
