Butterfly valve with triple eccentricity

摘要

The utility model relates to general mechanical engineering, in particular to pipeline valves with rotary discs with an axis of rotation crossing the shut-off element, and is designed to shut off and adjust the working medium of pipelines transporting liquid and gaseous media. The design of a disc valve with a triple eccentricity consists of a body having a saddle with a sealing surface, a shaft installed by means of bearing bushings in the above housing perpendicular to the axis of symmetry of its bore with an offset relative to the specified axis, mounted on the disc shaft, which is fixed on the shaft against rotation by keys, mounted on a lamella disc, the outer edge of which has a tapered surface , the axis of which is tilted relative to the axis of symmetry of the housing bore, a pressure ring that presses the lamella to the disk with screws, an oil seal, an oil seal cover, a bottom cover, a bracket installed on the housing connecting platform, a drive is fixed th on the bracket, while the axis of the minimum diameter of the housing bore for the installation of bearing bushings is displaced relative to the axis of the shaft in the direction of the location of the keys that fix the disc against rotation. Since when opening and closing a butterfly valve with a triple eccentricity, the keys together with the disk rotate 90 °, the displacement is performed in the direction of the keys in the open position, in the closed position or in an intermediate position, depending on the adopted technology for assembling and disassembling the butterfly valve with a triple eccentricity. The technical result provided by the utility model is the possibility of free removal of the shaft from the housing.