Temperature sensing element device and fireproof check valve

The utility model discloses a temperature sensing element device which is arranged on a gravity eccentric opening and closing mechanism inside a fireproof check valve and comprises a temperature sensing element and an element which is arranged on the gravity eccentric opening and closing mechanism and is fused when meeting high temperature. The return rod is a linkage rod piece which is rotationally connected to the gravity eccentric opening and closing mechanism and is used for realizing instantaneous fusing and bouncing; the pressing rod is rotationally arranged on the gravity eccentric opening and closing mechanism in a lever mode, one end of the pressing rod is connected with the temperature sensing element in a clamped mode, and the other end of the pressing rod is connected to the return rod in a pressed mode; the force storage elastic piece is tensioned on the pressing rod and the gravity eccentric opening and closing mechanism and used for increasing the bounce-off force of the pressing rod. And a bal