Automatic blowing device of converter flue gas flowmeter and control method thereof

The invention relates to related devices for measuring converter flue gas flow in the metallurgy field, in particular to an automatic blowing device of a converter flue gas flowmeter and a control method thereof. A blowing return circuit is increased, the blowing return circuit is composed of a main pipe connected with an air source and two parallel branch pipes led out from the main pipe, the first branch pipe is connected to a positive pressure pipe of a measuring pipeline, the second branch pipe is connected to a negative pressure pipe of the measuring pipeline, a fourth electromagnetic valve is arranged on the first branch pipe, a fifth electromagnetic valve is arranged on the second branch pipe, a first electromagnetic valve is arranged on the positive pressure pipe of the measuring pipeline, a second electromagnetic valve is arranged on the negative pressure pipe of the measuring pipeline, a connecting pipe is connected between the positive pressure pipe and the negative pressure pipe of the measuring pipeline, and a third electromagnetic valve is arranged on the connecting pipe. The blowing return circuit is used for blowing a throttling element and the measuring pipeline, blowing effect is achieved, measuring instruments are not damaged, blockage of the converter flue gas flowmeter measuring pipeline and the throttling element is effectively avoided, and measuring accuracy is guaranteed.