Combined steel wire rope guide mechanism of rotary drilling rig

Abstract

The invention discloses a combined steel wire rope guide mechanism of a rotary drilling rig. A pressurizing winch steel wire rope pulley, an auxiliary winch gooseneck boom pulley and a main winch pulley are arranged on a drilling mast; a support is fixed in the middle of the drilling mast, and a pressurizing rope guide pulley, an auxiliary winch rope guide pulley and a main winch rope guide pulley are mounted on the support; and in the cross section direction of the drilling mast, the auxiliary winch rope guide pulley is located on the outer side of the pressurizing rope guide pulley, and the main winch rope guide pulley is located on the outer side of the auxiliary winch rope guide pulley. According to the combined steel wire rope guide mechanism, the guide space of each steel wire rope is divided into three layers which are independent of one another, the structure is simplified, and space occupation is reduced; winding drums of an auxiliary winch and a pressurizing winch are short, the incident angle is small, rope guide mechanisms of the auxiliary winch and the pressurizing winch are arranged in the space of the two lower layers, and the bending moment borne by the pulleys in the working process is reduced; and the main winch is large in load and frequent in use, the incident angle of the steel wire ropes is large in change, the rope guide mechanism of the main winch is arranged on the outermost layer, and the rope guide mechanism is designed to be in a swing type so as to guarantee the stress state of the steel wire ropes and the pulleys of the guide mechanism.

Description

technical field [0001] The invention relates to a rotary drilling rig, in particular to a combined wire rope guiding mechanism of the rotary drilling rig. Background technique [0002] Rotary drilling rig wire ropes generally include main hoisting wire ropes, auxiliary hoisting wire ropes, and pressurized hoisting wire ropes. The steel wire rope is generally retracted and unwound through the winch mechanism. At present, the main winch in the field of rotary drilling rigs generally uses a single-row rope main winch. With the lowering of the steel wire rope in the working room, the steel wire rope rolls from one side of the drum to the other side of the drum, and the incident angle of the steel wire rope winding pulley will change greatly, and the steel wire rope winding pulley has higher requirements on the incident angle. Therefore, the rotary drilling rig needs a rope guide mechanism to guide the wire rope so that its incident angle meets the requirements of use. At pres...

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Problems solved by technology

[0003] Among them, the sliding rope guide mechanism installs sliding bearings on the inside of the pulley to make the wire rope slide on the longer shaft to meet the requirements of the incident angle when the wire rope moves from one side of the drum to the other, but this mechanism is not perpendicular to the pulley due to the force angle Therefore, the pulley needs to be subjected to bending moment during the working process, so that the sliding bearing in the pulley is easily worn into a bell mouth shape and fails

[0004] The swing mechanism meets the requirements of the incident angle when the steel wire rope moves from one side of the drum to the other by swinging around the hinged seat welded on the drill mast. This mechanism can ensure that the force direction of the pulley and the steel wire rope is always perpendicular, but its It takes up a lot of space, and other wire rope guide mechanisms cannot be arranged in its swing space

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