An outdoor fire hydrant that is convenient for water discharge

Abstract

The invention relates to the field of fire-fighting equipment, and discloses an outdoor fire hydrant that is convenient for water discharge, including a lower bolt pipe buried in the ground, the bottom flange of the lower bolt pipe is connected with a water elbow, and one end of the water elbow is connected to the There is a water pipeline, the bottom of the lower bolt pipe is provided with an underground drainage pipe, the top flange of the lower bolt pipe is connected to the upper bolt pipe, and the middle part of the top of the upper bolt pipe is threaded with a threaded valve stem. The top of the threaded valve stem is provided with a runner. The outdoor fire hydrant that is easy to drain, through the structural design of the adjusting oil pipe linked with the threaded valve stem, during the use of the fire hydrant, the threaded valve stem controls the valve core and the center valve seat to open when pumping water, so that the sealing ring and the drain valve seat are in close contact. Combined sealing of the drainage pipe, so that the negative pressure formed by the high-speed water flow in the inner cavity of the lower bolt pipe will not cause the suction of soil at the mouth of the drainage pipe and block the drainage pipe.

Description

technical field [0001] The invention relates to the field of fire fighting equipment, in particular to an outdoor fire hydrant which is convenient for water discharge. Background technique [0002] The outdoor fire hydrant is a water supply facility installed on the fire water supply pipe network outside the building. It is mainly used for fire trucks to take water from the municipal water supply pipe network or outdoor fire water supply pipe network to put out fires. One of the important fire-fighting facilities, the outdoor fire hydrant is mainly composed of body, valve seat, valve core, automatic drainage mechanism and other components. [0003] The existing fire hydrant automatic drainage mechanism is often equipped with an automatic drainage valve. However, if the automatic drainage method is used to realize automatic sealing and drainage, the drainage will not be complete due to insufficient residual water pressure. If the automatic drainage valve is realized by the fl...

AI Technical Summary

Problems solved by technology

[0003] The existing fire hydrant automatic drainage mechanism is often equipped with an automatic drainage valve. However, if the automatic drainage method is used to realize automatic sealing and drainage, the drainage will not be complete due to insufficient residual water pressure. If the automatic drainage valve is realized by the flow pressure When plugging and draining, due to the blocking of the valve core, the water flow entering the fire hydrant from the water pipeline will form a Venturi effect, that is, the water flow rate in the inner cavity of the fire hydrant passing through the valve seat and the valve core is large, and the discharge port will form an inward negative flow. If the pressure is high, the automatic drain valve cannot be blocked, and the soil outside the drain port will be easily adsorbed on the drain port, resulting in blockage.

Images