What are the hidden dangers of wire rope safety? [answered]

The improvement of galvanized steel wire rope is the key component of the improvement stage of coal mine. The damage condition of galvanized steel wire rope is immediately related to all normal production and manufacturing, staff personal safety and economic development and operation of coal mine. Therefore, great attention should be paid to it.

The deformation of galvanized steel wire rope is generally caused by the damage of mechanical equipment. When it is more serious, it does great harm to the compressive strength of galvanized steel wire rope. Many rope breaking safety accidents are due to the deformation damage of galvanized steel wire rope in advance, which did not cause sufficient reproduction of everyone, resulting in great disaster.

1. Trauma: during the operation process, the galvanized steel wire rope is caused by abnormal contact with other machinery and equipment. The significant trauma is that the galvanized steel wire rope jumps out of the diaphragm on the moving pulley rope groove and the steel wire rope drum. As a result, the galvanized steel wire rope of tens or even hundreds of meters is often damaged due to partial rolling.

2. Crushing: the galvanized steel wire rope is very easy to cause crushing after the steel wire rope drum is rolled up disorderly. When the steel wire rope drum is rolled up disorderly, the galvanized steel wire rope rolls over each other, and there is a "rolling squeak" sound during actual operation. The damage of galvanized steel wire rope caused by crushing will quickly appear the marks of wire breakage and flattening in some parts.

3. Kink: permanent deformation caused by partial distortion of galvanized steel wire rope is called galvanized steel wire rope kink. If the distorted orientation is consistent with the rotation direction of galvanized steel wire rope, it is called positive knot, on the contrary, it is called negative knot.

How to prevent the deformation of galvanized steel wire rope?

1. Trauma: the key to avoid the trauma of galvanized steel wire rope is to improve the machinery and equipment. The movable pulley rope groove shall be equipped with reliable ground anti-skid groove flat washer, and the gap between the flat washer and the outer side of the movable pulley shall not exceed 1 / 5 of the diameter of the galvanized steel wire rope. The galvanized steel wire rope on the steel wire rope drum shall not be loosened too much to prevent the rope loop from jumping out and the diaphragm from being damaged during winding.

2. Crushing: the countermeasure to avoid is to select the inclination angle between the moving pulley and the steel wire rope drum according to the design standard. If necessary, the tension device or rope pressing equipment can be set in the lifting organization to avoid the disorder of the galvanized steel wire rope.

3. The preventive measures for knots can be taken from the following three levels

a. Non rotating galvanized steel wire rope shall be used on key hoisting machinery.

b. Set the motor rotor (also known as anti rotation equipment) at the arbitrary end of the galvanized steel wire rope.

c. Improve the work initiative of the actual operation staff, and immediately terminate the actual operation and release it for recovery when finding the sign of kink.