Pressure release device for medium and low voltage porcelain lightning arrester

The utility model discloses a pressure release device for a medium and low voltage porcelain lightning arrester, which comprises a lightning arrester body, the lightning arrester body is composed of a porcelain bushing and a resistor disc column arranged in the porcelain bushing, the low voltage end of the lightning arrester body is provided with an end cover with a hole, the inner side of the end cover with the hole is provided with an explosion-proof membrane capable of exploding when the pressure is released, and the inner side of the explosion-proof membrane is provided with an explosion-proof cover. A sealing ring is placed after sealant is smeared on the surface of the explosion-proof membrane; one end, close to the low-voltage end of the lightning arrester body, of the resistor disc column is in contact with one end of a compression spring, and the other end of the compression spring is in compression contact with the end cover with the hole. Compared with the prior art, the utility model can effective