1. The main beam adopts optimized design with reasonable structure
;The main girders are box girders, and the main welds are
automatically welded by submerged arc and non-destructively
detected. The vertical deflection is 1/1000, and the web camber is
cut by numerical control .After welding the whole beam shot
blasting treatment, stress elimination, rust removal, Sa2.5 level.
2. The connection of the main force parts is adopted by 10.9 grade
high strength bolts to ensure the strength and precision of the
3. The drum is made by centrifugal casting process, and the
material reaches ZG55 or above ;The large diameter drum is
preferred to reduce the bending fatigue of wire rope and extend the
life of wire rope .The length of the reel is shortened and the
deflection Angle of the wire rope is reduced to prevent the rope
from falling off .There are 3 safety rings for the wire rope, which
are fixed with clamps. At least 2 rings of the wire rope are fixed.
4. The hook is manufactured in accordance with national standards,
and adopts anti-wear roller bearings from famous manufacturers of
Ha, Wa and Luo. The hook can rotate 360 degrees and is equipped
with spring-pressed safety clasp to prevent slipping.
5. Steel structure paint is epoxy zinc-rich paint, spray primer,
intermediate paint and finish paint, painting film thickness of
more than 120m.
6. The pulley material Q345B rolling pulley, and through heat
treatment, increase the abrasion resistance and strength of the
7. The control box is made of cold-rolled steel plate and the
surface is treated with corrosion protection.