Winch pressurization system and rotary drilling rig

Abstract

The invention provides a winch pressurization system. The winch pressurization system comprises pressurized winch, a first steel wire rope, a first fixed pulley set, a first movable pulley, a second steel wire rope, a second fixed pulley set and a second movable pulley; the first movable pulley and the second movable pulley are arranged on a power head; the first fixed pulley set comprises a firstpulley and a second pulley which are arranged on an upper mast; one end of the first steel wire rope is wound on the pressurized winch, and the other end of the first steel wire rope is led out by the pressurized winch and then sequentially wound on the second pulley, the first movable pulley and the first pulley to be connected with the upper mast; the second fixed pulley set comprises a third pulley arranged on a lower mast, one end of the second steel wire rope is wound on the pressurized winch, and other end of the second steel wire rope is led out by the pressurized winch and then sequentially wound on the third pulley and the second movable pulley to be connected with the lower mast; and winding directions of the first steel wire rope and the second steel wire rope on the pressurized winch are opposite. The number of the pulleys of the winch pressurization system is small, the using length of the steel wire ropes can be decreased, thus the cost is saved, and abrasion of the steel wire ropes is reduced.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction equipment, in particular to a hoisting pressurization system and a rotary drilling rig equipped with the hoisting pressurization system. Background technique [0002] Rotary drilling rigs can be divided into two types according to the pressurization method: cylinder pressurized rotary drilling rigs and winch pressurized rotary drilling rigs. The winch pressurization mainly adopts pulley block wire rope pressurization, which belongs to flexible pressurization, and can achieve the effect of pulse pressurization through the tension of the wire rope, which can effectively relieve the reaction force generated by drilling into the rock, reduce the impact on the mast, and prolong the use of the mast. life. [0003] The hoisting and pressurizing rotary drilling rig has a hoisting and pressurizing system including hoisting, wire rope, pulley block, etc. Improper layout of the hoisting...

AI Technical Summary

Problems solved by technology

The winch pressurization system of the rotary drilling rig will also limit its pressurization stroke

[0006] Furthermore, in prior art one and two, in order to solve the problem of disordered rope caused by the excessively large exit angle of the pressurized steel wire rope on the pressurized hoisting, prior art one has increased a transition pulley 9, and prior art two has increased a Transition pulley 3, thereby increasing the use length of the wire rope, thereby increasing the cost

[0007] Finally, in prior art 1 and 2, the fixed point of the steel wire rope is on the top, and the tensioning cylinder is on the bottom. This structure will increase the disassembly steps of the steel wire rope during the transportation of the rotary drilling rig.

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