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1.前言竖井提升机所用的深度指示器应具有下述功能: (1)向司机指示容器(如罐笼)在井筒中的位置; (2)容器接近井口或井底车场时发出减速信号; (3)在减速阶段,通过限速装置进行过速保
1. INTRODUCTION The depth indicator used in the shaft hoist shall have the following functions: (1) to indicate to the driver the position of the container (such as a cage) in the shaft; (2) to decelerate when the container approaches the wellhead or downhole; ( 3) During the deceleration phase, overspeed protection is implemented through the speed limiter