Variable-frequency electrically-driven top drive type core drill used for geological coring exploration

Abstract

The invention discloses a variable-frequency electrically-driven top drive type core drill used for geological coring exploration. The drill comprises a platform and a vertical derrick arranged on the platform, wherein an electrically-driven winch and a salvage winch are arranged on the platform and are used for reeling and unreeling a rope, an electrically-driven turn plate is further arranged on the platform and located at the lower end of the derrick, a guide rail parallel to the derrick is arranged on the derrick and is connected with a top driver through a bracket pulley, the top driver is directly connected with a drill rod through a connecting shaft by means of a variable-frequency motor, a motor of the top driver, a motor of the electrically-driven winch, a motor of the salvage winch and a motor of the electrically-driven turn plate are driven by a frequency converter in an electric control room, the frequency converter controls the motors to work in the electric control room, the drill is further provided with an engineer room used for monitoring the work of the drill, and a rope tension and rope speed detection device is further arranged at the top end of the derrick. According to the variable-frequency electrically-driven top drive type core drill used for geological coring exploration, the drill is driven by an alternating-current variable-frequency motor to achieve rotating, rising, feeding, salvaging and the like, the long-stroke guide rail is provided, the rope speed and tension detection function is achieved, and high efficiency and low energy consumption drilling operation is achieved under the control of the frequency converter.

Description

technical field [0001] The invention relates to geological drilling equipment, in particular to a variable-frequency electric-driven top-drive core drilling machine for geological coring exploration. Background technique [0002] With the rapid development of the national economy, the society's demand for various resources has increased accordingly, and with the continuous reduction of natural resources, deep exploration and prospecting has become the main target of attack. In order to cope with the rapid shortage of surface resources, the future exploration focus will gradually shift from shallow to deep exploration and development to explore the potential of the second prospecting space resources. [0003] At present, traditional core drilling rigs mainly include mechanical vertical shaft core drilling rigs and hydraulic power head core drilling rigs. Most mechanical vertical shaft core drilling rigs are powered by electric motors or internal combustion engines, and drive...

AI Technical Summary

Problems solved by technology

Since the main actuators of the mechanical vertical shaft core drilling rig are mechanical transmission and speed change, the transmission efficiency is low and the speed change mechanism is complex, resulting in the defect of high energy consumption and low efficiency; and the hydraulic feed system is limited by the stroke of the hydraulic cylinder. Frequent downturning of rods will easily cause core blockage at the bottom of the hole, prolonging the auxiliary working time, and the gyrator cannot also be used as a screwing tool, which greatly limits the operating efficiency and operating safety of the mechanical vertical shaft core drilling rig

[0004] Hydraulic power head type core drilling rig, its rotary, feeding and lifting drilling tools and other mechanisms are all driven by hydraulic drive, the hydraulic motor is directly installed on the gyrator or power head, and the gyrator or power head moves along the guide frame, which makes the hydraulic pressure The transmission efficiency is low and the energy consumption is large; at the same time, due to the lack of overload capacity of the hydraulic system, the ability to deal with accidents in the hole is weak; although its feeding stroke is larger than that of the mechanical vertical shaft core drilling rig, its feeding stroke is still small, not enough It can meet complex drilling requirements, and at the same time, its working efficiency is low and energy consumption is high, which increases working time and operating cost

[0005] Due to the limitation of the stroke of the feeding system, it is difficult for the above two types of existing core drilling rigs to realize long-stroke vertical root drilling, hole sweeping, back reaming and other operations in complex formation tripping; the lack of automatic swing rod system makes it impossible to realize The mechanized operation of automatic rod loading and tripping out; both lack centralized operation and monitoring of drilling rig executive components and real-time storage and remote monitoring of drilling parameters, which cannot meet complex drilling requirements

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