Abrégé

A top drive mechanism for use in a drill pipe, related to the technical field of hydraulic coke-cutting in a delay coking unit of the oil refinery industry, comprising a gooseneck connector, a flushing pipe assembly, an output shaft, and a power mechanism used for driving the output shaft into rotation. The output shaft is an integrated structure constituted by a shaft body and a flange. Step I is provided on the outer circumferential surface of the output shaft in a bearing hole on a frame-bracket. A support ring is provided on an end face of step I. The output shaft matches the support ring via key I. A locknut is also provided on the output shaft. The locknut fixes the support ring onto the end face of step I. A self-aligning thrust roller bearing is provided at the lower part of the support ring. An axial force of the output shaft is exerted on the frame-bracket via the locknut, the support ring, and the self-aligning thrust roller bearing. The structure has great stability, a reasonable output shaft support scheme that extends the service life of the top drive mechanism, and allows for convenient and expeditious installation and removal.

Classes IPC  ?

• C10B 33/00 - Dispositifs de déchargement pour fours à cokeGlissières à coke

Abrégé

A rotating body-structured automatic coke remover. An inner cavity (202) of a housing and a center hole (101) of a connector are adjoinedly connected together to constitute a high-pressure water passage (6). A valve sleeve is provided within the inner cavity (202) of the housing. The housing (2) and the connector (1) are rotating bodies having the centerline of the high-pressure water passage as the axis. The housing (2) is provided on the outer circumferential surface thereof with a groove (205). A pressure-controlled pilot valve (5) has every part thereof arranged within the space of the groove (205). A coke-cutting nozzle (3) has every part thereof arranged within the space of a coke-cutting nozzle mounting hole (203) on the circumferential surface of the housing (2). The coke-cutting nozzle (3) and a rectifier (14) are connected. A drilling nozzle (4) has every part thereof arranged within the space of a drilling nozzle mounting hole (204) on the lower surface of the housing (2). The aperture diameter of a flow hole (701) on the valve sleeve (7) and opposite the coke-cutting nozzle (3) is greater than the outer diameter of the rectifier (14). One end of the rectifier (14) is inserted into the corresponding flow hole (701). A gap is provided between the outer wall of the rectifier (14) and the inner wall of the flow hole (701). The coke remover has reduced rotation resistance and is thus not easily jammed by coke when drilling.

Classes IPC  ?

• C10B 33/00 - Dispositifs de déchargement pour fours à cokeGlissières à coke
• B08B 9/093 - Nettoyage de récipients, p. ex. de réservoirs par la force de jets ou de pulvérisations