Fireproof and environmental -protecting well -cover ring

The utility model provides among the industry fireproof and environmental -protecting well -cover ring, bolt, gasket, well lid be in order through screw fastening connection, seals the two exhaust holes on well lid upper portion, the marginal inslot in the well lid outside is equipped with T type ring, and the well lid lid seals through inslot T type ring in the walling crib, can realize this utility model's mesh. 种工业环保、防火下水井盖井圈中，螺栓、垫片、井盖按顺序通过螺纹紧固连接，对井盖上部的两排气孔进行密封；井盖外侧边缘槽内设有T型环，井盖盖在井圈上，通过槽内T型环进行密封；可实现该实用新型的目的。