초록 ▼

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 thermo

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 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).

대표청구항 ▼

1. In a gas pipeline, a flow measuring instrument for measuring gas flowing through the pipeline and a temperature sensing device positioned within an opening in the pipeline for sensing the temperature of the flowing gas in the pipeline for use in the flow calculation, said temperature sensing devi

1. In a gas pipeline, a flow measuring instrument for measuring gas flowing through the pipeline and a temperature sensing device positioned within an opening in the pipeline for sensing the temperature of the flowing gas in the pipeline for use in the flow calculation, said temperature sensing device comprising:a hollow metallic outer tube extending within said pipeline transversely of the gas flow and having a closed end to define a thermowell; a temperature sensing probe received within said thermowell; a metallic housing secured to said outer tube and secured to said pipeline for mounting said sensing device on said pipeline, said outer tube formed of an aluminum material having a high thermal conductivity and said metallic housing having a low thermal conductivity between about 4 and 15 BTU/Ft. Hr/Ft2/.degree. F.; and a plurality of annular fins formed of a metallic material having a high thermal conductivity mounted about said tube for thermal transfer to said temperature sensing probe from said tube.