Many people are not very familiar with the connection device of the dispatch winch. Below, we will introduce the inspection and maintenance of the dispatch winch connection device in detail. There are three types of winch connection devices: clip type hook head, plug-in type hook head, and sliding type hook head.
The shaft sinking winch clip type hook head is composed of a U-shaped rope clamp, a rope guard ring, and a single loop chain (or double loop chain, triple loop chain), commonly used for lifting small winches. Its structure is simple, easy to make, easy to replace parts, and it is widely used. However, U-shaped clip nuts are prone to loosening and falling off, which may lead to detachment accidents. It is necessary to check and tighten them once per shift, and ensure that each hook head has no less than 4 pairs of clips and safety rope rings in good condition.
The plug-in hook head utilizes the frictional force between the strands after insertion to bear the lifting load, and is also composed of a protective rope ring, a chain, and a plug-in rope buckle. It has good safety, convenient production, and multiple uses. But it is necessary to ensure the quality of the insertion, the length of the insertion should not be less than 4-5 lay lengths, and ensure that the protective rope ring is intact and does not fall off. Each shift should conduct inspections for broken wires, wear, rust, and deformation.
The winch company stated that the sliphead type hook head is a connecting device that injects tungsten metal into the sliphead body of a rope head with a bent hook in a scattered shape, commonly used for lifting main inclined shafts. Its safety is good, and the lifespan of using a longevity winch is long.
However, the production process is more complex, so small winches are less commonly used and are mostly used for lifting the surface wellhead of the main inclined shaft. The quality of the tungsten injection process for hook heads must be strictly guaranteed, otherwise accidents of wire rope head detachment may occur. The key to ensuring quality is to strictly degrease the inner wall of the sliding head and the steel wire of the rope head, so that the surface can be reliably coated with a tin layer. This is to ensure that the tungsten metal is closely bonded with the inner wall of the sliding head and the steel wire head after injection, and to prevent extraction accidents from occurring.
