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我处在开展大质量和大容量的量值传递工作中,常因荷重超出天平最大量限,不能适应工作需要。如用衡量法检定150升的一等金属量器时,只能分次进行衡量,使积累误差过大,满足不了检定精度的要求。为了适应工作的需要,在原50公斤的天平上装设一根副梁扩大量限。经过实践证明,衡量精度比原来分次进行要准确,并提高工效2～5倍。现介绍于下。这种天平的结构如图所示。副梁1上装有四个刀子,即两个承重刀2和3,一个支点刀4,一个力点刀5。6为重心调整铊。支点刀4借吊环7支持在承架8的升降钩9上。力点吊环10通过十字接头11与天平横梁12上的吊环13联接。称盘14悬挂在升降钩15上,再通过十字接头16与重点吊环17联接。
I am in carrying out large-scale and large-capacity value transfer work, often because the load exceeds the maximum limit of the scale, can not adapt to work needs. Such as measuring 150 liters with the first-class metal measuring device, can only be divided into several measurements, the accumulation of error is too large, can not meet the requirements of test accuracy. In order to meet the needs of work, in the original 50 kilograms of balance installed on a vice-beam to expand the limit. After practice proved that the measurement accuracy than the original to be accurate, and improve ergonomics 2 to 5 times. Now introduced in the next. The structure of this balance is shown. Vice beam 1 is equipped with four knives, that is, two load-bearing knives 2 and 3, a fulcrum knife 4, a force point knives 5.6 adjust the center of gravity thallium. The fulcrum knife 4 is supported on the lifting hook 9 of the rack 8 by means of a lifting ring 7. Force ring 10 through the cross connector 11 with the balance beam 12 on the rings 13 coupled. Weigh plate 14 hanging on the lifting hook 15, and then through the cross joint 16 and the key rings 17 coupled.