发明名称 |
Apparatus for controlling level of cryogenic liquid |
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.
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申请公布号 |
US5671603(A) |
申请公布日期 |
1997.09.30 |
申请号 |
US19950569436 |
申请日期 |
1995.12.08 |
申请人 |
THE PERKIN-ELMER CORPORATION |
发明人 |
MCCORKLE, E. JOEL;VOGEL, HERMAN;MARGULIES, MARCEL;FERRANTI, RICHARD T. |
分类号 |
F17C5/02;F17C13/02;G05D9/12;(IPC1-7):F17C13/02 |
主分类号 |
F17C5/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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