Mini electric rope hoist rope is in one of the main components, the number of broken wire rope, erosion (wear) the amount of deformation, the use of such length and fixed state should meet the national standard.
(1) wire rope used should meet the requirements, the connection method should be correct.
a. rope ends fixed platen should be ≥ 2 or with a wedge fixed on the drum and other member.
b. When the hooks and other devices extract in the lowest position (including pit), the wire rope on the drum winding number, in addition to the fixed rope tail number of laps, but must leave ≥ 2 laps.
(2) one of the following occurs rope should be scrapped:
a. rope around the post in a twisting pitch (refers to any one of the rope around a week shares axial distance) number of broken wires within the total number of wire rope of 10%.
b. lifting hot metal or dangerous goods, rope, broken wires scrapped its general bouncer inflatable take half the heavy machine,hoist and trolley such as broken wires phenomenon concentrated in the local, or six times the length of broken wire rope diameter concentrated in a shares on a prescribed shall be half that line scrapped.
c. surface layer of steel wire rope corrosion or abrasion of the surface of the original wire diameter of 40%.
d. rope diameter is reduced amounted to 7%.
e. rope obvious internal corrosion.
f. rope surface wear or corrosion, there are a certain number of broken wires, broken wires tension meter from the surface to the requirements of a and b are multiplied by the reduction coefficient is determined after: when wear or corrosion rates were 10%, 15 %, 20%, 25%, 30% -40%
, The reduction factor corresponding to 85%, 75%, 70%, 60%, 50%.
g. entire strand break or burn out.
h. partial outer rope elongation was "cage"-shaped or rope fiber core diameter increases more serious.
i. rope kinking, dead, hard curved, plastic deformation,hoist equipment hemp core prolapse severely deformed.