Main engine for oil drilling machine hydraulic hoister

Abstract

The invention discloses a main engine for an oil drilling machine hydraulic hoister. The engine comprises a hydraulic cylinder body and a hydraulic cylinder piston rod, the outer wall of the hydrauliccylinder body is provided with a fixed pulley block, the outer side of the fixed pulley block is provided with a lower retaining rope cover, the top end of the hydraulic cylinder piston rod is provided with a movable pulley block, the outer side of the movable pulley block is provided with an upper retaining rope cover, the top of the movable pulley block is provided with a locknut, the lower portion of the hydraulic cylinder body is provided with a hydraulic valve block, and the bottom end of the hydraulic cylinder body is provided with a single ear plate. The main engine is provided with the movable and fixed pulley blocks, the central axis of the movable pulley block and the central axis of the fixed pulley block are perpendicular to each other, the movable pulley block and the fixed pulley block are respectively provided with pulleys of different diameters, so that the span is uniform when a steel wire rope penetrates through the pulleys, it is ensured that the deflection angle ofthe steel wire rope is reduced, the eccentric wear is effectively reduced, and the service life of the pulleys and the steel wire rope is prolonged.

Description

technical field [0001] The invention relates to the technical field of oil drilling, in particular to a main engine for an oil drilling rig hydraulic hoist. Background technique [0002] In oil field drilling operations, it is often necessary to carry out hoisting operations such as throwing drilling tools, lifting drilling tools, and transporting objects to the derrick at high altitude. The current common practice is to use tools such as pneumatic winches and hydraulic hoists for lifting operations. The hydraulic hoist is favored by people because of its stable transmission, high efficiency, convenient operation, and the absence of irregular winding of the wire rope of the wind winch. The existing main engine of the hydraulic hoist has the following disadvantages: 1) The wire rope deflection angle between the pulley blocks of the main hoist is relatively large, and the wire rope and the pulley are severely worn; When the situation cannot be recovered for a short time, the...

AI Technical Summary

Problems solved by technology

The main frame of the existing hydraulic hoist has the following disadvantages: 1) The wire rope deflection angle between the pulley blocks of the hoist main frame is relatively large, and the wire rope and the pulley are severely worn; When the situation cannot be recovered for a short time, the heavy objects hoisted by the hoist are suspended in the air, and it is difficult to lower them, posing a safety hazard

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