초록 ▼

An apparatus for a decoking system, for raising and lowering a cutting tool into a coking drum, has at least one rigid vertical member extending above the coking drum with a toothed rack extending substantially the full height of the member. A rigid frame with provisions for mounting a cutting tool

An apparatus for a decoking system, for raising and lowering a cutting tool into a coking drum, has at least one rigid vertical member extending above the coking drum with a toothed rack extending substantially the full height of the member. A rigid frame with provisions for mounting a cutting tool is movably mounted to the rigid vertical member. A motor is mounted to the rigid frame and powers a pinion gear which is drivably engaged on the toothed rack such that rotation of the pinion gear raises or lowers the rigid frame on the vertical member.

대표청구항 ▼

[ Having described the invention, we claim:] [6.] In a decoking system of the type having a high pressure water jet cutting tool rotatably mounted on a drill stem suspended from a tool carrier mounted on a rigid vertical member extending above a coking drum, said tool carrier comprising:a toothed ra

[ Having described the invention, we claim:] [6.] In a decoking system of the type having a high pressure water jet cutting tool rotatably mounted on a drill stem suspended from a tool carrier mounted on a rigid vertical member extending above a coking drum, said tool carrier comprising:a toothed rack extending substantially the full height of said rigid vertical member;a rigid frame movably mounted to said rigid vertical member;a motor mounted to said rigid frame and having means for driving at least one pinion gear, said at least one pinion gear being drivably engaged on said toothed rack such that rotation of said pinion raises or lowers said rigid frame on said vertical member;a pulley mounted near the top of said rigid vertical member; anda flexible cable fixed to said rigid frame and extending over said pulley to a counterweight, said counterweight substantially balancing the weight of the movable rigid frame and all components carried thereon.