1. The nuv used in the lifting mechanism driven by manpower is tested with 1.5 times the rated load as the inspection load.
2. The nuv used for the power-driven lifting mechanism shall be tested with 2 times the rated load as the inspection load.
3. Tom qab ntawvnuvraug tshem tawm los ntawm kev tshuaj xyuas, yuav tsum tsis muaj qhov tsis xws pom lossis hloov pauv, thiab nce qib qhib yuav tsum tsis pub tshaj 0.25% ntawm qhov loj me.
4. Raunuvs that have passed the inspection, a mark should be printed in the low-stress area of the nuv, including the rated lifting weight, factory mark or factory name, inspection mark, production number, etc.
Covnuvyuav tsum tau muab pov tseg thaum ib qho ntawm cov xwm txheej hauv qab no tshwm sim:
â ‘tawg;
section'Kev phom sij phom sij mus txog 10% ntawm qhov loj me;
â “degree Cov qib kawm qhib tau nce 15% piv nrog qhov loj me me;
④The torsion deformation of the nuv body exceeds 10°;
⑤The dangerous section of the nuv or the neck of the nuv is plastically deformed;
⑥The nuv thread is corroded;
⑦When the wear of the nuv bushing reaches 50% of the original size, the bushing should be replaced;
Thaum lub mandrel ntawm daimnuvyog hnav rau 5% ntawm qhov loj me me, lub mandrel yuav tsum tau hloov.