Water supply networks are not just for the water supply of urban residents, but also serve as the main sources for the elimination of fire.Separate access to them in case of an emergency creates a column of fire, directly connected to a hydrant.
Purpose and main constituent elements of a fire hydrant
to extinguish the fire must have special equipment that ensures the rational use of all the necessary resources for its elimination.Fire hydrants installed to carry water intake from the public network, it allows you to respond quickly in an emergency.Furthermore, they can be used for the purpose of reclamation.Features hydrant installation are to establish certain conditions for its fire protection, so it is often installed in a specially equipped shelters.Hydrants are of two varieties:
1. Ground.They are fixed on the ground, lying in the water system.It is very often to them immediately after installation joins fire column.
2. The second type - underground hydrants.They are intended for connection to the water wells.Their work is provided mounted on the surface of the column.
main requirements to the functionality of an element of modern fire-fighting systems are to create a continuous flow of water and frost.Features of the fire hydrant provides its main parts: body, pipe, valves, all components of the nipple and having a special thread.
Fire column.Purpose and structural features
To operate the hydrant special key element is used, which is designed for direct connection with it.In this case, it is a fire column serves as a link for the feed water through the hydrant.The main components of the element body and head are.At the bottom of the case there is a bronze ring with a triangular thread, it provides a reliable installation.It should be noted that especially for underground hydrants there fire pillars of the CPA, which can be used to open and close access to water from the well.It is equipped with a threaded ring for installation and operation in its upper part joins the tee.Through this column takes the pressure switch, with which you can open the hydrant valve, but it must first be removed to close.
Features of Fire column
At work leans protective cover fire hydrant and screwed tight connection to the column, which is defined in terms of pressing pads.Control pressurized water is provided by turning the handle counterclockwise, thus rotating rod that gradually leads to opening of the valve through the other coupling elements.The water then flows through a passage formed in the body of the hydrant, and proceeds to the fire column.At the conclusion of the closing pressure occurs in reverse order, and the remaining water is drained through a special channel that overlaps with the valve open by a rubber seal.