Temperature sensing device for metering fluids
US6390670B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Nov 22, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/1605
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thermowell assembly (20) shown in FIG. 2 is positioned in a pipeline (10) for sensing the temperature of the fluid medium in the pipeline (10) for transmitting the sensed temperature to a meter (12). A temperature sensing probe is received within a temperature conducting tube (36) forming a thermowell and having a plurality of annular fins (40) extending thereabout. In the embodiments of FIGS. 1-7, a liquid (50) is provided in an annular space between the thermocouple (28) and the temperature conducting tube (36). Non-metallic members (70, 74, 80) are positioned between the pipeline (10) and the temperature transmitting tube (36) to isolate thermocouple (28) from ambient changes in the temperature of metal pipeline (10) which may result in an error in the temperature of the flow medium sensed by the thermowell assembly (20). High temperature embodiments shown in FIGS. 4 and 5 do not contain any non-metal components and provide a minimal metal to metal contact between the metallic temperature conducting tube (36B) of the thermowell (20B) and the adjacent metal mounting structure (52B, 62B). The embodiments shown in FIGS. 8-12 illustrate a temperature sensing probe comprising a tem…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.