Vertical Shaft Drilling Rig Torque Amplification and Pressure Stabilization
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Solution Overview
Problem
Current drilling methods using large-scale vertical shaft machines face low efficiency due to restricted cutterhead pressure and torque under reduced pressure conditions, making rapid shaft formation difficult.
Innovation Solution
A vertical shaft drilling rig with a novel drilling method that includes a derrick, drill pipe, torque amplification driver, device for stabilizing cutterhead pressure, and muck removal system, which increases torque and pressure while providing mandatory guiding, enhancing drilling precision and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drilling under reduced pressure is used, then the drilling system can operate, but the cutterhead pressure and torque are greatly restricted
Solution Approach 1:
A guiding column is introduced as an intermediary component between the drill pipe and cutter head assembly. The guiding column transmits force from the drill pipe to the cutter head while providing structural support, enabling effective cutterhead pressure and torque transmission despite the reduced pressure environment
Solution Approach 2:
A hydraulic cylinder is used to provide forward driving force to the cutter head. The hydraulic system generates the necessary cutterhead pressure independently from the reduced pressure environment, allowing the drilling system to maintain operational reliability while overcoming the force restrictions
2Reliability
If conventional vertical shaft machines are used, then the system can drill, but the drilling efficiency is low and rapid shaft formation is difficult
Solution Approach 1:
The cutter head assembly is designed with dynamic stabilization capabilities through the guiding column and hydraulic cylinder system. This allows the cutter head to maintain stable operation at high speeds and depths, significantly improving drilling efficiency and enabling rapid shaft formation while maintaining reliable drilling capability
Solution Approach 2:
The guiding column and stabilization mechanisms are pre-installed and configured before drilling begins. This preliminary setup ensures that the cutter head is properly positioned and stabilized from the start of drilling, maximizing drilling efficiency and shaft formation speed from the beginning of operation
3Productivity
If high torque and high pressure are applied to increase drilling speed, then productivity improves, but guiding precision and verticality may deteriorate
Solution Approach 1:
The guiding column serves as a precision intermediary that transmits force while maintaining strict vertical alignment. It provides mandatory guiding that ensures shaft verticality and guiding accuracy even when high torque and pressure are applied to increase drilling speed
Solution Approach 2:
The system incorporates sensors that provide real-time feedback on cutter head position and drilling parameters. This feedback mechanism allows for continuous adjustment to maintain shaft verticality and guiding precision while operating at high productivity levels
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves high torque, high pressure, and high verticality in shaft formation, increasing construction efficiency and reducing building cycle time with improved precision and stability, suitable for both soft soil and rock strata.
Implementation Method 1
The muck removal system utilizes air lift reverse circulation
Implementation Method 2
a device for stabilizing cutterhead pressure, a torque amplification driver
Implementation Method 3
the planetary reducer has an input shaft connecting to the drill pipe and an output shaft connecting to the drive flange
Data Source
AI summary
A vertical shaft drilling rig which includes a derrick and a flatcar element. The rig includes a drill pipe connecting to the derrick, a pipe joint provided on the drill pipe, a device for stabilizing cutterhead pressure connecting to the drill pipe, a torque amplification driver at which the device for stabilizing cutterhead is installed, a cutter head connected to the torque amplification driver, a separate plant on the ground surface, a muck removal system transporting the muck produced to the separate plant, an electric cabinet, a hydraulic station, a power line, and a deep shaft line extension device between the hydraulic station and the power line. The torque amplification driver includes a pressure balance valve, a planetary reducer, a drive flange and a main bearing. The deep shaft line extension device includes a float, a pulley assembly, a line reel, a steel wire and a winch.