1. Braking behind. Often the challenge is a simple statement, possibly a common failure caused by lag at the braking level.
2. The hydraulic lock of the motor port number is invalid, and the motor cannot stop rotating immediately under the effect of the torque of the galvanized steel wire rope.
3. The drilling rig has the function of drill pipe fluctuation, which is to release the brake data signal oil from the solenoid valve 1. Then the solenoid valve 2 is connected to the oil inlet and outlet of the main hoist motor according to the two oil pipes, so as to ensure that the twist drill can touch the work table and have a certain working pressure during the whole drilling process. In this working condition, the solenoid valve 2 will be cut off according to the two oil pipelines of the motor entering and emitting oil. If it is not cut off, the drill pipe will drop immediately.
