Gated manhole for drainage culvert of thermal power plant

摘要

the present invention , such as nuclear power plants or thermal power plants in the thermal power plants in the drainage culvert ( ) for installation relates to a manhole (manhole) which is rich in the bottom of the manhole type ( ) within the manhole of bubbles contained in the Thermal ( ) by installing blocking the door to be automatically closed when the water level rises manhole bottom drainage culvert will you prevent the introduction . ; the foam spewing phenomenon through the manhole was endemic problem in the maintenance of drainage culverts in thermal Power Station by the present invention has been able to basically prevent , through which plants of course, also ensure the safety of the operation , it is possible to obtain an effect of reducing the maintenance costs .