发明名称 |
Pressure responsive hopper level detector system |
摘要 |
The level of such granular materials as fly ash and grain in a hopper presenting a differential internal hopper pressure above and below the level of materials in the hopper is sensed by sampling the pressure through a single flowless pressure conveying passageway extending by means of a port into the hopper interior. The pressure significantly changes above and below the level of materials. Thus, typically with a vacuum of about eight inches of water above the material level, the vacuum pressure is less than one-half an inch of water when the granular materials cover the port. Thus, a differential pressure gage connected between the atmosphere and the flowless pressure conveying passageway will indicate a significant difference in pressure when the level of materials covers the port. With a pressure gage operating relay contact an electric monitoring and control system may be used to automatically discharge the materials over long periods of time without maintenance.
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申请公布号 |
US4527714(A) |
申请公布日期 |
1985.07.09 |
申请号 |
US19830467959 |
申请日期 |
1983.02.18 |
申请人 |
WHITE RIVER TECHNOLOGIES, INC. |
发明人 |
BOWMAN, HAROLD L. |
分类号 |
G01F23/14;(IPC1-7):B67D5/08 |
主分类号 |
G01F23/14 |
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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