GAS VENT Russian patent published in 2018 - IPC F17D1/02 

FIELD: gas industry.

SUBSTANCE: invention relates to the gas industry and is intended for purging gas pipelines. Technical result of maintaining the normalized noise impact on the environment during long-term operation with the gas pipeline is achieved by purge plug includes a branch pipe welded to the gas pipeline with a shut-off device and an outlet pipe installed on it with a cap, made in the form of a duct formed by an outer funnel-shaped and internal perforated conical walls, between them the guide vanes are installed, and above them in the funnel-shaped wall there is a hole for condensate drainage, at the same time on the outgoing pipe below its upper cut and on the top of the junction with its outlet pipe made windows, respectively, for gas pass and atmospheric air, at that the curvature of the curved grooves in the holes of the perforated tapered wall is made according to the cycloid as a brachistochron, and the cavity profile of the curved grooves is made in the form of a dovetail.

EFFECT: reduction of noise impact on the environment when purging gas pipelines with a purge plug by performing the curvature of the curved grooves in the holes of the perforated conical wall along the cycloid-like brachistochrone with the cavity profile of the curved grooves in the shape of a dovetail.

1 cl, 6 dwg