Mechanical type fireproof biological shielding automatic-closing cover plate

The invention relates to a mechanical type fireproof biological shielding automatic-closing cover plate comprising a support, a transmission mechanism, a cover plate body, a counter weight and a fuse protector. The transmission mechanism is arranged on the support. The cover plate and the counter weight are both arranged on the transmission mechanism and are in transmission connection through the transmission mechanism. The cover plate is locked to the upper end of the support through the fuse protector. The mechanical type fireproof biological shielding automatic-closing cover plate is automatically closed in a mechanical manner by means of the structural design of the physical properties of materials without motor or crane operation under the conditions of radiation and fire prevention of nuclear facilities and the like, and then the fireproof isolation function is achieved. 本发明涉及种机械式防火生物屏蔽自动关闭盖板，包括支架、传动机构、盖板、配重块以及熔断器；所述传动机构设置在支架上，所述盖板、配重块均设置在所述传动机构上，且所述盖板与配重块之间通过传动机构传动连接，所述盖板通过熔断器锁紧在所述支架的上端。本发明在核设施等具有辐射、防火