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按照有关规定,使用的桥式起重机应定期检测其空载及重载状态下的挠度值,以保证其使用中的安全可靠性。过去我们采用在吊钩跑车轨道上方,沿其轨道方向用紧线器拉直一根钢丝,再辅以普通万能量具的方法来进行测量。用上述方法进行测量,不仅精度低,且效率也低。 我们曾设想过采用将水准仪支架到起重机的走台板上来代替原有的方法来进行挠度测量,但考虑到一般桥式起重机的走台板都是用厚度不大的花纹钢板铺焊于车梁的型钢桁架上的,且纵梁跨度都较大。因此其走台板的刚度很差,而观测者在走台板上的行动及相邻起重机的开动等振源的存在,必然使仪器处于不稳状态,无法进行准确测量。 针对上述问题,我们决定试用自动安平水准仪进行测量的方法。我们
In accordance with the relevant provisions of the use of overhead traveling crane should be regularly tested under no-load and heavy-duty deflection values to ensure its safety and reliability. In the past we used in the hook sports car above the track, along the direction of its track with a straight line straightening a steel wire, supplemented by ordinary universal measuring method to measure. With the above method of measurement, not only low accuracy, but also low efficiency. We have envisaged the use of the level bracket to the cranes to go on the deck instead of the original method of deflection measurement, but taking into account the general overhead crane deck are used to the thickness of the tread plate steel welding shop beam Of the steel truss, and the stringer span are larger. Therefore, the stiffness of the walking board is poor, and the presence of the observer walking on the board and the vibration of adjacent cranes inevitably make the equipment unstable and unable to accurately measure. In response to the above problems, we decided to try the automatic level measurement method. we