Views: 0 Author: Site Editor Publish Time: 2026-07-07 Origin: Site
The main winch and auxiliary winch are the core executing components of the rotary drilling rig lifting operation. Their functional positioning is accurately distinguished and adapted to different pile foundation construction conditions. They are the key structures to ensure the orderly development of drilling, lifting, and hoisting operations. The main hoist is the core load-bearing component of the equipment, mainly responsible for the lifting and lowering of drill rods and drill buckets. It matches the main construction process of pile foundation drilling throughout the entire process, with high frequency of operation and large load-bearing capacity, directly determining the efficiency and stability of drilling rig drilling construction. The auxiliary hoist is an auxiliary operating component that does not participate in the core drilling process. It is mainly used for lightweight operations such as lifting casing, assisting in the displacement of drilling tools, cleaning debris at the hole opening, and supporting equipment with steel wire ropes. The working load is lower and the operating scenario is more flexible. The clear division of labor and mutual cooperation between the two constitute a complete lifting operation system for rotary drilling rigs, which is suitable for complex and varied geotechnical construction scenarios.
Lift capacity is the core performance indicator of the winch, and the load design differences between the main and auxiliary winches fully meet the bearing requirements of their respective construction conditions. The rated lifting capacity of the main hoist is large, with extremely strong heavy load bearing capacity, which can stably carry the comprehensive weight of the full-length drill rod and full bucket of slag soil. It can cope with high load scenarios such as deep hole construction and hard rock formation operations, and has short-term overload buffering performance, which can resist the instantaneous impact force caused by drilling tool jamming and slag soil jamming during construction, avoiding equipment failure caused by sudden load changes. The lifting force of the auxiliary winch is much lower than that of the main winch. With lightweight and stable load-bearing as the design core, it is only suitable for lifting lightweight materials such as casing and small machinery, without heavy load operation design. It is strictly prohibited to replace the main winch to undertake drilling tool lifting operations. During construction, it is necessary to strictly distinguish between the load limits of the two, prevent operations beyond the rated load, and avoid safety hazards such as structural deformation and wire rope breakage from the source.
The differentiated design of operating speed is the key to balancing the construction efficiency and operational safety of rotary drilling rigs. The main winch is designed for stable operation under heavy loads, with a relatively gentle lifting speed. Its core purpose is to ensure smooth lifting and lowering of drilling tools, avoiding problems such as drill rod shaking, hole wall collapse, and drilling bucket slag removal caused by excessive speed. Especially in deep holes, soft soil, and quicksand formations, low-speed stability control can effectively improve the quality of drilling and reduce rework losses. At the same time, the main winch has a speed adjustment function, which can adapt to the lifting rhythm according to the hardness of the formation and the depth of the borehole. The auxiliary winch focuses on lightweight and efficient operation, with faster running speed and more sensitive response. It can quickly complete scattered operations such as casing lifting and on-site auxiliary relocation, reducing the time consumption of auxiliary processes and effectively improving the overall construction progress. The speed design that combines fast and slow has achieved the construction advantages of stable main construction and fast auxiliary operations.
The main hoist has a high load-bearing capacity and high operational risks, making it the top priority for the safety control of rotary drilling rigs. The core of the control revolves around three dimensions: heavy load stability control, anti fall protection, and load monitoring. During the construction process, it is necessary to monitor the tension of the main hoist wire rope throughout the entire process to prevent overloading and off load operations. In the event of drilling tool jamming or sudden changes in formation resistance, it is strictly prohibited to forcefully lift the rope. The drilling tool must be slowly lowered and the jamming must be removed before starting the operation. At the same time, it is necessary to regularly inspect the main winch braking system and hydraulic control system to ensure that the braking response is sensitive, the locking is stable, and to prevent accidents such as slipping and falling of the drill. In addition, it is necessary to strictly regulate the operating procedures, lift and lower the main hoist at a constant speed during deep hole operations, avoid emergency stops and starts, regularly inspect hidden dangers such as wire rope wear, drum deformation, and bearing aging, and ensure the long-term stable operation of the main hoist.
Although the auxiliary winch has a low workload, it operates flexibly and frequently, making it prone to violations. Standardized safety control measures need to be implemented. In daily operations, it is necessary to adhere to the principle of lightweight operation, and it is strictly prohibited to use auxiliary winches to lift heavy equipment such as drill rods and drill buckets, and to prevent the use of overloaded conditions and loads. During the operation, it is necessary to ensure that the lifting materials are firmly tied to avoid safety accidents caused by material shaking and falling off, and to avoid illegal operations such as inclined pulling and long-distance dragging of materials. Regularly inspect the integrity of the secondary hoist wire rope, limit device, and braking components to ensure that the limit protection and emergency braking functions are functioning properly. Operators need to standardize the control rhythm, avoid material swinging caused by rapid start stop, strictly follow the auxiliary operation process, and balance operation efficiency and construction safety.
