Technical requirements for working conditions of wire rope for rotary drilling rig

Technical requirements for working conditions of wire rope for rotary drilling rig
The steel wire rope is an important consumable material in the use of the rotary drilling rig equipment and an important part of ensuring the safe production of the rotary drilling rig equipment. The working conditions and environment in use have the following characteristics.
(1) One end of the steel wire rope for the rotary drilling rig is fixed to the drum of the hoisting machine, and the other end is fixed to the elevator at the upper end of the armor drill rod, with a fixed pulley and a guide wheel in the middle. Since no moving pulley is installed, the single rope of the steel rope is required to have a large pulling force to ensure that the extractor rotates freely under the action of the reverse torque of the steel rope, and to ensure the safety and reliability of the lifting and lowering of the drill rod.
(2) The main function of the wire rope of the rotary drilling rig is to lift the drill pipe and drilling tools. The rotary drilling rig requires frequent lifting and lowering of the drilling tool during construction. Therefore, the steel wire rope is required to have good wear resistance. At this time, the compacted steel wire rope shows certain advantages.
(3) The maximum pulling force of the wire rope is the sum of the weight of the drill, the weight of the rotary drilling bucket, and the gravity of the muck in the drill bucket.
(4) Rotary drilling rig is suitable for soil layer, sand layer, and soft, small-grained pebble layer. The best drilling effect is in silty clay, clay silt and other clay layers: construction in hard rock layers and dense pebble and boulder layers is more difficult and prone to accidents, which does not reflect the functional advantages of rotary drilling rigs. Drilling operations under harsh conditions require high impact resistance and wear resistance of the wire rope.
(5) The difficulty of drilling by rotary drilling rig is how to improve the performance and service life of the steel wire rope for rotary drilling rig under the condition of rock hardness of 67HRC in rock-embedded construction.
(6) Because the wire rope and the end of the extractor for the rotary drilling rig are often immersed in the mud, the working environment is harsh and corrosion is prone to occur. The special working conditions and environment of the rotary drilling rig propose higher twisting and surface grease for the steel rope Coating requirements.
According to the working conditions and environment of the rotary drilling rig, AULONE GROUP applies the grease on the surface of the steel wire rope, and also applies the asphalt-based steel wire grease on the steel wire rope core, which effectively isolates the steel core from the mud and prevents corrosion and rust. The rope core breaks ahead of time.
(7) The special working conditions of the rotary drilling rig "bite rope" frequently occur, which will have a great impact on the performance of the wire rope. For the rotary drilling rig with multi-layer winding of steel wire rope, the phenomenon of "biting rope" in the process of use is unavoidable. In order to improve the service life of the steel wire rope, the parts that are prone to "bite rope" of the wire rope should be checked frequently, and the lubrication should be strengthened, or the "channel rope" should be cut off periodically, and the "bite rope" part should be staggered and cut off. It is necessary to change the reel form of the rotary drilling rig, which is an effective measure currently taken by domestic construction machinery manufacturing enterprises to improve the performance of the rotary drilling rig. Drawing on the successful design of a foreign rotary drilling rig, a heavy-duty main reel is used, and the number of simple layers to accommodate the wire rope is large. The wire rope is changed to a single layer winding without overlapping and rolling, which can reduce the wear of the wire rope. It should also be noted that the actual width of the wire rope drum matches the integer multiple of the actual diameter of the wire rope.
Recently, the domestic rotary drilling rig has changed, mainly due to the diversification of drilling tools and the use of multiple drills, and the configuration of the main winding wire rope of the rotary drilling rig (configuration improved rope pressing device), so that the wire rope is neatly arranged during the work process To prevent the phenomenon of pushing rope and biting rope. This is the technical support provided by the machinery manufacturing industry to improve the performance of the wire rope and extend the service life of the wire rope, which objectively weakens the harsh technical requirements of the rotary drilling rig on the wire rope.
The performance and life of the steel wire rope for rotary drilling rig depends on the scientific matching of the steel wire structure, as well as the quality of the steel wire twisting, the configuration of the steel wire and the inspection and maintenance during the use.

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