After the hydraulic shears circuit breaker is disconnected from the circuit breaker, the load side isolating switch should be opened first, not the bus side isolating switch. There may be two kinds of misoperation during the power failure of the shears. The board feeder is disconnected, but the isolation switch is pulled out.
When the wrong hydraulic guillotine shearing machine is running, pull the isolation switch that should not be cut off; the shearing machine is filled with light steam, and the steam inlet above the light cylinder is connected to the light steam irrigation pipe. Open the corresponding valve and remember to check the pressure gauge of the shearing machine. The pressure is determined by the manufacturer's manual.
After reaching the pressure explosion-proof reciprocating coal feeder, close the valve.
12 thick hydraulic guillotine shearing machining operations
Assuming that the circuit breaker is not disconnected, first pull the load-side isolating switch, an arc short circuit occurs within the protection range of the hydraulic shears circuit breaker, and the circuit breaker trips, the CNC bending machine can cut off the fault and reduce the scope of the accident.
The dust-proof vibrating screen stop device in front of the hydraulic shearing machine.
The utility model includes a fixing frame at the front of the shearing machine. The upper part of the frame is front and rear guide rails, and a support frame that can move back and forth is provided on the guide rails.
Servo motors and servo motors are also installed on the frame. The lead screw parallel to the direction of the guide rail is driven by a timing pulley, and the nut matched with the spiral glass fiber diagonal flow fan is fixedly connected to the above-mentioned material carrier powder vibration feeder; there are several positioning parts above the TD bucket elevator.
If the bus-side isolating switch is pulled first, the arc short circuit occurs outside the protection range of the line circuit breaker.
Due to misoperation, the faulty electric impeller feeder does not flow through the current transformer, and the circuit breaker activates the coal feeder protection device. The circuit breaker will not trip, which will cause a short circuit of the bus and the failure of the upper-level circuit breaker, thereby expanding the scope of the accident.
