| 摘要 |
PURPOSE:To reduce measuring errors, by providing a temperature detection rod which has a thermosensitive member at the tip thereof while having a flange-shaped fin and is to be inserted coaxially into an inner cylinder. CONSTITUTION:A part of fluid flowing into a protective cylinder 2 via an inlet opening 2a from the upstream side of a tube wall flows axially through spaces of an inner cylinder 3 and the protective cylinder 2 while the remainder flows axially through the inner cylinder 3 from the opening 3b of the inner cylinder 3 and then, converge to flow out via an outlet opening 2b of the protective cylinder 2. Here, with the action of fins 3c and 3c supporting the inner cylinder 3, the inner cylinder 3 is insulated thermally against the protective cylinder 2 to be almost the same in the temperature as the internal fluid. The thermosensitive member 4a at the tip of the temperature detection bar 4 is also allowed to contact the internal fluid directly to perform a direct heat exchange and becomes almost the same in the temperature as the internal fluid fluid by being shielded from radiant heat with a flange-shaped fin 4b. Then, as the member 4a is shielded double through the inner cylinder 3 and the protective cylinder 2, there is no transmission of radiant heat thereto and the inner cylinder 3 is thermally shielded with the protective cylinder 2 while heat exchange is done with the internal fluid through internal and external surfaces thereby eliminating the possibility of adversely affecting the member 4a. |
