The invention discloses switching control method and device for floating operation of a rotary drilling machine. The switching control method is that the floating state of a main winch is referenced when a controller detects a floating input signal of an operation handle; in case that the main winch does not enter the floating state, a floating solenoid valve is electrified; when the floating input signal of the operation handle is more than a preset value, the main winch is kept in the floating state, and otherwise, the main winch does not enter the floating state; as the main winch enters the floating state and a the controller detects the floating input signal of the operation handle, the floating solenoid valve is out of work, and thus the floating state of the main winch can be switched; a display displays the floating state of the main winch. With the adoption of the switching control device and method, a worker does not need to operate a key or pedal a switch all the time during switching the floating state of the main winch, so that the time of pressing the key during floating operation can be reduced, the frequency of pressing the key during the floating operation can be decreased, and meanwhile, mis-operation can be avoided, and as a result, the safety in switching of the floating operation state of the main winch can be ensured.
Switching control device and method for floating operation of rotary drilling machine
2015-04-01
Patent
Elektronische Ressource
Englisch
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