For Type QD general overhead crane Commissioning Guide

QD-purpose bridge crane, used more, in response to this, this article today is unfolding around it, but mainly to explain one aspect that QD-purpose bridge crane  test run, then to specifically addressed illustrate.1 test run conditionsWhen the crane is in the normal state, the test run can be performed.(2) a preliminary test run statusOff the top beam railing doors and hatch door, the control handle on the zero position, and then close the protective plate knife switch and emergency switch, and then press the start button, thejib crane entered the ready state.3 step test runCommissioning of the crane can be divided into three steps for the load test, static load test and dynamic load test.(A) no-load testTrolley go back and forth along the track three times, in the process of taking, the wheel should be no slipping phenomenon, starting and braking should be normal and reliable operation of the limit switches should be accurate, and the buffer head collide with the collision position should be accurate.Start lifting mechanism, so that empty hook rise and fall times, the actions required to prepare lifting mechanism reliable.Car open to the cross, and then a slow walk along the length of the track twice, inspection room racks and rails; then walking back and forth three times the rated speed, testing running gear, then all parts should be functioning properly.(2) static load testSedan to the end limit position, standby after a smooth body, marked the midpoint of the main beam zero position.The middle of the car open to the main beam, the speed of the slowest heavy lifting, and gradually increase the weight until the rated super heavy weight, increased to 100mm from the ground up after the stop, and then suspended for 10 minutes. This is repeated three times to check for residual deformation, pay attention to each test interval can not be less than 10 minutes. After passing through the test without exception, can be over 25% of the constant load test, as above, will not repeat it here.(3) Dynamic load testLet the car upgrade nominal weight, repeated lifting and falling brake test, and then make the car fully loaded, walking back and forth along the track 3-5 times, and finally the middle of the car open to the bridge, Steel crane traveling back and forth throughout the rated speed 2-3 times. In this process, all parts should be functioning properly, and after unloading, agencies and bridge without residual deformation. After passing through the test without exception, can be over 10% constant load test, as above, will not repeat it here.