挖掘机WK-4m3型在我矿投入使用几十年来,发现一个内在的缺陷,就是机械室左走台推拉门打开时没有防护栏杆,当维护工人对变压器加油、检修、更换时,作业空间狭窄存在不安全隐患,为此提出机械室推拉门处增设防护栏杆。1增设安全防护栏杆的位置和尺寸在左走台推拉门底部向上500mm处 Excavator WK-4m3 type put into use in mine for several decades and found an inherent flaw is the mechanical room left walkway sliding doors open without protective railings, maintenance workers when the transformer refueling, overhauling, replacement, the work space is narrow There are unsafe hidden dangers, thus proposed mechanical room sliding door additional railings. 1 additional safety guardrail position and size in the left walkway sliding door at the bottom 500mm up