The invention relates to a hydraulic system for driving a brake handle of a drilling winch and a drilling speed control method. The hydraulic system comprises an emergency oil cylinder, a brake oil cylinder, a hydraulic station, a safety valve set, a load sensitive valve set, a speed sensor and a pressure sensor. An oil inlet of the load-sensitive valve group is communicated with an oil discharge port of the hydraulic station, a first working oil port and a second working oil port of the load-sensitive valve group are respectively communicated with a rod cavity and a rodless cavity of the brake oil cylinder, and an oil discharge port of the load-sensitive valve group is communicated with an oil return port of the hydraulic station; the pressure sensor is used for detecting the pressure of a rodless cavity of the brake oil cylinder. The hydraulic system drives the piston rods of the emergency oil cylinder and the brake oil cylinder to control the deflection angle of the brake handle, and emergency braking of the well drilling winch or adjustment of the rotating speed of a roller of the well drilling winch can be achieved; and in the drilling process of the drilling winch, closed-loop control can be formed among the speed sensor, the pressure sensor and the load-sensitive pressure reducing valve, so that the drilling speed of the drilling winch can be accurately controlled.
本发明涉及用于驱动钻井绞车的刹把的液压系统及钻速控制方法,包括应急油缸、制动油缸、液压站、安全阀组、负载敏感阀组、速度传感器和压力传感器;负载敏感阀组的进油口与液压站的排油口连通,负载敏感阀组的第一工作油口和第二工作油口分别与制动油缸的有杆腔和无杆腔连通,负载敏感阀组的排油口与液压站的回油口连通;压力传感器用于检测制动油缸的无杆腔的压力。本发明通过液压系统驱动应急油缸和制动油缸的活塞杆以控制刹把的偏转角度,能够实现对钻井绞车的紧急制动或调整钻井绞车的滚筒的转速;且钻井绞车下钻过程中,能够通过速度传感器、压力传感器和负载敏感减压阀间形成闭环控制,对钻井绞车下钻速度进行精确控制。
Hydraulic system for driving brake handle of drilling winch and drilling speed control method
用于驱动钻井绞车的刹把的液压系统及钻速控制方法
2023-01-13
Patent
Electronic Resource
Chinese
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