JPH01158683U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a diagram illustrating the main parts of the pressure relief mechanism according to the embodiment of the present invention, Figs. FIG. 1... Pressure plate destruction shaft (rod-shaped shaft), 2... Flange plate, 3... Support spring (first biasing member)
, 4...thermal spring (second biasing member), 5
... Regulation plate, 102 ... Pressure release plate, 106 ... Zinc oxide element.

Claims (1)

[Scope of Claim for Utility Model Registration] In a pressure relief mechanism for a lightning arrester that discharges internal gas pressure generated inside an insulating container to the outside, the insulating container is fixed to either or both of the upper end of the opening and the lower end of the opening of the insulating container. a pressure relief plate that seals and closes the pressure relief plate, and a regulation plate that has an open center portion and tightly contacts the inner surface of the pressure relief plate to regulate the position of the rod-shaped shaft tip.
A rod-shaped shaft that loosely fits into the opening of the regulation plate and protrudes toward the inner surface of the pressure relief plate, and has a flange plate fixed to the shaft body; a first biasing member that engages with the inner surface of the provision plate;
A second bias made of a shape memory alloy that expands and contracts at a set temperature by inserting a rod-shaped shaft loosely and engaging one end with the flange plate and engaging the other end with the surface of the endmost element of the stacked characteristic elements. A pressure relief mechanism for a lightning arrester, characterized by comprising a member.