The invention discloses a rear-mounted two-layer coiling and variable rope groove diameter type coiling block for winching of a rotary drilling rig. The rear-mounted two-layer coiling and variable rope groove diameter type coiling block comprises a coiling block body, a steel wire rope (3) and coiling block side edges (6); the coiling block side edges (6) are integrally formed or fixedly connected to two sides of the coiling block body; a small-diameter first rope groove (1) and a large-diameter second rope groove (2) are continuously formed in the surface of the coiling block body; a first guide block (5) is arranged between the first rope groove and the coiling block side edge at one side of the coiling block body; the first rope groove (1) extends from the first guide block and passes through three to five rope grooves to be transferred to the second rope groove through the second guide block (7); the second rope groove spirally extends from the second guide block to the coiling block side edge at the other side of the coiling block body; when constructing through the rotary drilling rig, the steel wire rope working section is kept in the second rope groove (2) and a double-folding-line rope groove formed in the outer surface of the steel wire rope of the first rope groove all the time, and the circumstance of changing the steel wire rope between layers is avoided; therefore, the damage to the steel wire rope can be greatly reduced by the coiling block on the premise that the rope arranging and storing is performed, and as a result, the service life of the steel wire rope is effectively prolonged.
Rear-mounted two-layer coiling and variable rope groove diameter type coiling block for winching of rotary drilling rig
2015-04-29
Patent
Elektronische Ressource
Englisch
IPC: | B66D Haspeln , CAPSTANS |