Lifting device for oil drilling machine based on alternating-current variable-frequency electric winch

Abstract

The invention discloses a lifting device for an oil drilling machine based on an alternating-current variable-frequency electric winch. The lifting device comprises a variable-frequency electric control assembly, a winch main body and a control switch; a frequency converter, a temperature controller, an electric heater and a control loop unit are arranged in a control cabinet at the upper part ofthe variable-frequency electric control assembly; and a brake resistor is arranged in a resistor cabinet under the control cabinet. The winch main body comprises an alternating-current variable-frequency brake motor, a planetary speed reducer and a winding drum body which are arranged on a winch frame and are coaxially connected in sequence, wherein the winding drum body is for winding a steel wire rope; an automatic rope arranging device is arranged on the upper side of the winch frame; and a rope pressing device is arranged on the rope outlet side of the winch frame. According to the invention, the variable-frequency electric control assembly and the alternating-current variable-frequency braking motor are mutually combined to realize an aim of ''energy consumption braking''. The deviceprovided by the invention has the advantages of convenient operation, safety, reliability, accurate speed control, stable transmission, low energy consumption, high efficiency, capability of meeting use requirements of wide areas including cold areas and the like.

Description

technical field [0001] The invention relates to the technical fields of oil drilling and mechanical equipment, in particular to a lifting device for an oil drilling rig based on an AC frequency conversion electric drawworks. Background technique [0002] In oil field drilling operations, tools such as pneumatic / hydraulic winches are commonly used for hoisting operations; the existing pneumatic / hydraulic winches have the following disadvantages: 1) During the transmission process, because the energy needs to be converted twice, there are pressure loss, volume loss and Mechanical friction loss, low overall efficiency; 2) Pneumatic / hydraulic winch is required as a power machine to output energy, whether it is lifting heavy objects or lowering heavy objects, and the energy consumption is high; 3) Gas / liquid has certain compressibility, and the matching surface Leakage is inevitable, a strict transmission ratio cannot be guaranteed, transmission accuracy is poor, and energy consu...

AI Technical Summary

Problems solved by technology

[0002] In oil field drilling operations, tools such as pneumatic / hydraulic winches are commonly used for hoisting operations; the existing pneumatic / hydraulic winches have the following disadvantages: 1) During the transmission process, because the energy needs to be converted twice, there are pressure loss, volume loss and Mechanical friction loss, low overall efficiency; 2) Pneumatic / hydraulic winch is required as a power machine to output energy, whether it is lifting heavy objects or lowering heavy objects, and the energy consumption is high; 3) Gas / liquid has certain compressibility, and the matching surface Leakage is inevitable, strict transmission ratio cannot be guaranteed, transmission accuracy is poor, and energy consumption is high

4) The working performance and efficiency of pneumatic / hydraulic transmission system are greatly affected by temperature, and the working performance is poor in high temperature or low temperature environment

For example, at low temperature, pneumatic transmission (compressed air) is prone to condensation or even freezing, which will cause equipment jamming and damage; hydraulic transmission (hydraulic oil) has high viscosity, poor fluidity, and low efficiency

Especially in alpine regions, it is prone to failure, such as in some alpine regions of Russia and Central Asia, it is difficult to meet the use requirements of the local environment

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