Temperature sensing device for metering fluids

Details Temperature sensing device for metering fluids Temperature sensing device for metering fluids

2007-01-23

2007-01-23

Gutierrez, Diego (Department: 2859)

Thermal measuring and testing

Temperature measurement

Combined with diverse art device

C374S163000, C374S183000, C374S208000

Reexamination Certificate

active

10146594

ABSTRACT:
A thermowell assembly (20) shown in FIG.2is 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.4and5do 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.8–12illustrate a temperature sensing probe comprising a temperature sensing assembly (80F,80G) mounted within the internal bore (37F,37G) of the finned tube (36F,36G). The temperature sensing assembly (80F,80G) includes a carrier (82F,81G) with epoxy (96F,96G) mounting a temperature sensing element (93F,82G) within the carrier (82F,81G).

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