Electrical Control System of Rotary Drilling Rig: Fault Diagnosis, Safety Protection and Operation Logic

Overall Working‑condition Adaptability of the Electronic Control System

As the core construction machinery for pile‑foundation projects, rotary drilling rigs operate for long hours in harsh field environments characterized by heavy dust, intense vibration and drastic temperature fluctuations. The electric control system acts as the central hub that coordinates the whole‑machine power, hydraulics, travelling and drilling operations. Most mainstream rotary drilling rigs today adopt a bus‑based intelligent electronic control architecture. With high‑performance controllers, multiple types of sensors and on‑board display terminals, the system realizes full‑coverage real‑time monitoring and precise regulation of machine operating status. Abandoning the conventional complicated wiring layout, the complete system enables data exchange among all control units via standardized bus protocols. Balancing operational efficiency, equipment stability and construction safety, it adapts to diverse working scenarios including alternating soft‑hard strata, high‑low‑speed drilling and slewing positioning, and delivers core electronic‑control support for stable machine performance.

Intelligent Fault‑diagnosis Operation Mechanism

The electronic‑control system of rotary drilling rigs is equipped with a full‑coverage fault‑diagnosis module. It collects key operating parameters in real time such as voltage, temperature, pressure and rotational speed, and accurately identifies various abnormalities in electric circuits, sensors, actuators and supporting power‑hydraulic systems. Built‑in dedicated fault‑judgment logic can automatically detect common troubles including loose wiring, power supply failure, sensor malfunction and actuator jamming. Corresponding fault codes are generated and pushed to the on‑board terminal, clearly indicating fault locations and root causes. For frequently‑occurring construction faults such as emergency‑stop circuit breakdown, abnormal controller signals and regulated‑power‑supply damage, the diagnosis system delivers millisecond‑level early warning and fault pinpointing. It effectively solves the problems of low efficiency and high error rate of manual troubleshooting, provides accurate data for on‑site rapid maintenance and fault reset, and greatly cuts down equipment downtime.

All‑round Safety‑protection Function System

Given the high‑risk nature of pile‑foundation construction, the electronic control system establishes a multi‑level active safety‑protection mechanism to fully prevent unintended machine movements, overload‑induced damage and personal safety hazards. Integrated with core functions such as emergency‑stop protection, operation safety interlock, limit protection and overload voltage stabilization protection, the system fully complies with construction machinery safety specifications. During operation, the safety‑handle interlock automatically locks the hydraulic system under unattended conditions to avoid accidental startup. Protection functions including left‑right limit for the mast and winch travel limit precisely constrain the working stroke of mechanical components and prevent over‑travel damage. Furthermore, the system features automatic power‑cutoff protection against overload, over‑voltage and over‑temperature. When risks such as overloaded operation, circuit anomalies or excessive oil temperature are detected, it automatically cuts off power output and locks operating movements, building a solid safety barrier for both equipment and on‑site construction from the electronic‑control perspective.

Standardized Operation Logic

The whole rotary‑drilling‑rig operation runs under standardized, programmed logic of the electronic control system, ensuring coordinated motion of all mechanisms. Pre‑configured full‑process control sequences cover power‑on self‑check, standby mode, precision drilling, slewing positioning and shutdown reset. After power‑up, the machine automatically performs self‑inspection of all circuits, sensors and control units, and can only enter working mode once no fault is detected. During drilling, the electronic control system adaptively adjusts feed pressure rate, power‑head rotating speed and winch lifting/lowering speed according to stratum conditions, achieving precise electro‑hydraulic coordinated control to guarantee hole‑forming accuracy and construction efficiency. Balancing the flexibility of manual manipulation and the stability of intelligent regulation, the whole‑machine operation logic standardizes workflows, avoids equipment failures and safety risks caused by improper or mistaken operations, and meets the standardized construction requirements of various pile‑foundation projects.