Views: 0 Author: Site Editor Publish Time: 2026-02-04 Origin: Site
The drill bucket, tooth seat, and casing of the rotary drilling rig, as core wear-resistant components that directly contact rock and soil, directly determine construction efficiency and cost with their service life. Through scientific selection and standardized maintenance, significant reduction in wear, minimized downtime, and efficient operation of the equipment can be achieved.
The selection of drilling buckets must strictly match the construction geology to avoid excessive wear caused by "one machine for multiple uses". For soft formations such as clay and silty soil, use spiral drilling buckets with moderately spaced bucket teeth and sharp cutting edges to reduce soil adhesion and resistance; for loose formations such as sandy soil and pebble layers, give priority to sand-fishing drilling buckets with bottom doors and thickened wear-resistant liners to enhance impact resistance; for hard rock and weathered rock formations, it is necessary to use rock-embedded drilling buckets with dense alloy teeth and thickened cylinders, combined with high-strength wear-resistant steel plates to resist rock cutting impact.
At the same time, wear-resistant strips should be welded in advance or wear-resistant blocks inlaid on the easily worn parts of the drilling bucket cylinder and bottom plate to form a protective layer; after each construction, the residual slag in the bucket should be cleaned up in time to avoid hard soil caking from aggravating wear, and regularly check the cylinder deformation and weld cracking, and repair in time to prevent the damage from expanding.
As the carrier of the bucket teeth, the stability of the tooth holder directly affects the service life of the bucket teeth. Priority should be given to integral tooth holders made of high-strength alloy steel, which have stronger impact resistance and deformation resistance, avoiding the problem that split tooth holders are prone to loosening and falling off. The welding between the tooth holder and the drilling bucket must be firm, with uniform welds and no air holes, to prevent falling off due to vibration during construction.
Bucket teeth should be selected according to geological classification: ordinary alloy bucket teeth are used for soft formations, with moderate cost; tungsten carbide alloy bucket teeth are used for pebble and hard rock formations, which have higher hardness and stronger wear resistance. During daily construction, regularly check the wear degree of the bucket teeth. When the wear amount exceeds 1/3 of the original size, or when there is chipping or fracture, replace them immediately to avoid aggravating the wear of the tooth holder and drilling bucket due to bucket tooth failure. At the same time, keep the bucket teeth and the tooth holder tightly fitted to prevent gaps caused by loosening and reduce abnormal wear.
The casing is mainly used for wall protection and preventing hole collapse, with its wear mostly concentrated on the cylinder wall and the bottom. When selecting the type, choose a casing with an appropriate thickness based on the hole diameter and geology. For loose and easily collapsible formations, use a thickened steel plate casing to enhance pressure resistance; the diameter of the casing should be slightly larger than the hole diameter to reduce friction with the hole wall.
During use, the casing must be buried vertically and firmly to avoid one-sided stress and wear on the cylinder wall due to inclination; during construction, promptly clean the slag inside the casing to prevent long-term friction between the slag and the cylinder wall. Regularly inspect the casing for deformation and rust. Minor deformations should be corrected in a timely manner, and severely rusted or damaged casings should be replaced immediately to avoid hole collapse caused by casing failure and reduce indirect wear on the drill bucket.
Regular lubrication: Apply lubricating grease regularly to the moving parts of the tooth holder and the hinge joints of the drill bucket to reduce friction and rust.
Avoid illegal operations: It is strictly forbidden to force drilling into hard rock or carry out overloaded construction to prevent impact damage to wear-resistant parts.
Timely repair: When wear-resistant parts have slight wear or scratches, repair them by surfacing wear-resistant materials in a timely manner to avoid expanding damage.
Storage protection: When the machine is shut down, clean the wear-resistant parts, apply anti-rust oil, and store them in a dry and ventilated place to prevent rust.
Through geological adaptation selection, standardized operation and refined maintenance, the service life of the rotary drilling rig's drill bucket, tooth holder and casing can be effectively extended, the cost of equipment loss can be reduced, and the continuous and efficient progress of pile foundation construction can be guaranteed.
