发明授权
- 专利标题: Apparatus for controlling level of cryogenic liquid
- 专利标题(中): 用于控制低温液体水平的装置
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申请号: US569436申请日: 1995-12-08
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公开(公告)号: US5671603A公开(公告)日: 1997-09-30
- 发明人: E. Joel McCorkle , Herman Vogel , Marcel Margulies , Richard T. Ferranti
- 申请人: E. Joel McCorkle , Herman Vogel , Marcel Margulies , Richard T. Ferranti
- 申请人地址: CT Norwalk
- 专利权人: The Perkin-Elmer Corporation
- 当前专利权人: The Perkin-Elmer Corporation
- 当前专利权人地址: CT Norwalk
- 主分类号: F17C5/02
- IPC分类号: F17C5/02 ; F17C13/02 ; G05D9/12
摘要:
An apparatus for controlling level of cryogenic liquid in a vessel includes a transfer duct to a pressure supply tank. Pressure pulses are applied to the tank at one rate when the level is below a primary sensor in the vessel, and at a lower rate when the level is above the sensor, so as to compensate for intrinsic declination of the level. At startup a constant pressure is applied to the tank until the level reaches a lower sensor, and a relief valve over the tank is opened when the level overshoots to an upper sensor. Turbulence in the vessel is reduced by a pair of coaxial baffles at the liquid inlet to the vessel, and by a housing with tubular extensions enveloping the sensors.