The invention relates to a
maintenance system and method for an air blowing type level gauge. The
maintenance system includes a reaction kettle, an air blowing type level gauge, a vacuum stop valve, and a
nitrogen gas delivery
pipe. The air blowing type level gauge is composed of a
positive pressure measuring tube needle, a special blowing valve, a level gauge
positive pressure measuring tube, a level gauge negative pressure measuring tube, a
differential pressure transmitter, a blowing two-way base, and flanges. The air blowing type level gauge is mounted at the top of the reaction kettle. The level gauge
positive pressure measuring tube is mounted at a position of at least half of the reaction kettle through a
flange. The positive pressure measuring tube needle is mounted in the level gauge positive pressure measuring tube. The special blowing valve is mounted on the
nozzle of the level gauge positive pressure measuring tube and is in contact with the positive pressure measuring tubeneedle. The negative pressure measuring tube is mounted on the top of the reaction kettle through a
flange. The
nitrogen gas delivery
pipe is respectively connected to the level gauge positive pressure measuring tube and the level gauge negative pressure measuring tube through the
differential pressure transmitter, the blowing two-way base and the vacuum stop valve in sequence. According to the
maintenance system and method for the air blowing type level gauge, the dredging of the needle is performed by the level gauge positive pressure measuring tube and the negative pressure measuring tube,so the operation is simple and convenient, and the operation risk and labor intensity are also reduced.