Function of underground fire hydrant
Among the outdoor underground fire water supply facilities, the underground fire hydrant is one of them. It is mainly used for water supply for fire engines or devices directly connected with water hoses and water guns and extinguishing fire. It is a necessary special setting for outdoor fire water supply. Installed underground, it will not affect the appearance and traffic of the city. It is composed of valve body, elbow, drain valve and valve stem. It is also an indispensable fire extinguishing device in cities, power stations, warehouses and other places. It is especially needed in urban areas and places with few rivers. It has the features of reasonable structure, reliable performance and convenient use. When using underground fire hydrants, it is necessary to set obvious signs. Underground fire hydrants are mostly used in cold places because they are not easy to be damaged by freezing.
Advantages of underground fire hydrant
It has strong concealment, will not affect the beauty of the city, has low damage rate, and can freeze in cold areas. As for the use and management departments, it is not convenient to find and repair, and it is easy to be buried, occupied and pressed by the parking of construction vehicles. Many underground fire hydrants need to be protected by the well chamber, and a lot of money will be invested. In the planning of underground pipe network, many unknowns are occupied, and the planning is also very difficult.
The outlet diameter of fire hydrant shall not be lower than φ 100mm, due to the increase of urban buildings and population density, the difficulty of fire extinguishing is increased. In order to ensure the water requirement of fire extinguishing water pressure, at least ensure that the outlet diameter of fire hydrant is not less than φ 100mm。
The opening and closing direction of the underground fire hydrant shall be the same, and it shall be closed clockwise and opened counterclockwise. Stainless steel is selected as the screw rod, and NBR rubber is used as the sealing cup. The anti-corrosion in the cavity is to meet the sanitary indicators of drinking water, and even the same requirements as the valve.
Post time: Nov-01-2021