Electric hoist gantry crane load test content and procedures

No load test conditions are normal only after allowing for load test. Load test of static and dynamic two kinds, the first for the static load test, and then the dynamic load test.1, the load test test content.(1) Metal construction gantry crane at the bolted connections and welding quality, mainly primary end beam quality of the connection.(2) machinery and equipment, metal structures and spreader strength and rigidity as well as the strength of the crane rails.(3) brake action should be flexible and reliable work.(4) No noise reducer.(5) good lubricity lubrication parts, the bearing temperature rise does not exceed specified.(6) The mechanism parts should be smooth, no vibration phenomenon, if any defects, deficiencies should be repaired and then tested.2, static load test, electric hoist lifting rated load.Running back and forth the entire length of the bridge after several electric hoist will be open to the bridge at one end, in the amount column to find the zero line (ie, the actual height of the beam at this time).Measured stiffness: the electric hoist bridge open to the middle with a eot crane hook lifting rated load, leaving the ground 100 ~ 200mm, suspended for 10 minutes, this time measuring bridge girders or lower deflection, A5 grade crane girder deflection under should not exceed L/700.Rated load test after passing for 25% of the rated load test, overload test method and rated load test the same eligibility conditions that no permanent deformation after the test, trial can be connected for three times. The results of a third subject.3, dynamic load test.(1) Static load test conditions are normal only after allowing for dynamic load test, dynamic load test as the date of acceptance of the conditions are not.(2) dynamic load test is a constant load in excess of 10% case of repeated lifting and falling commissioning and operation of institutions in this load of perishable commissioning and for carts, electric hoist running terminal switch test.4, the electrical component testing regulations and inspection items:(1) gantry hoist crane agencies repeatedly for continuous operation time does not exceed 15 minutes. Therefore, the test agencies operate alternately. Only when the body is completely stopped before allowing reverse.(2) Check the limit, safety devices, interlocks action is correct and reliable.(3) failure of the electrical equipment operation, should be eliminated, not motors and electrical equipment exceeds a predetermined standard temperature, the movable contact may not have burning conditions, the device should not abnormal sound and vibration phenomena.