Protective device of explosion-proof lamp

The invention relates to a protection device of an explosion-proof lamp, which comprises an upper shell and a first guardrail fixed on the upper shell, a second guardrail is arranged on the inner side of the first guardrail, and the second guardrail is rotatably connected with the upper shell; in an original state, the second guardrail coincides with the first guardrail; when the temperature reaches a preset state, the second guardrail can rotate by a certain angle relative to the first guardrail. When the protection device of the explosion-proof lamp is used, a light source is installed in the second guardrail, when the temperature reaches a preset state, the second guardrail can rotate by a certain angle relative to the first guardrail, the size of holes of the guardrails is reduced through cooperation of the second guardrail and the first guardrail, and broken fragments are not prone to penetrating through the guardrails to fall off. 本发明涉及一种防爆灯的防护装置，包括上壳体和固定于所述上壳体上的第一护栏，所述第一护栏的内侧设置有第二护栏，所述第二护栏与所述上壳体转动连接；在原