Design method for automatic high-pressure water cleaning device

Abstract

The invention belongs to the technical field of secondary refining of molten steel, in particular to a design method for an automatic high-pressure water cleaning device used for cleaning accumulated dust on the inner wall of a pump body of a steam ejection pump. The design method is characterized in that: the designed automatic high-pressure water cleaning device controls an ejection angle of a high pressure nozzle through the reciprocating movement of an adjustment connecting rod, namely a hydraulic cylinder rotationally connected with the pump body controls bidirectional extension through an electromagnetic valve, and the hydraulic cylinder drives a swing arm three, a rotating shaft, a swing arm one and a swing arm two and finally drives and controls the reciprocating movement of the adjustment connecting rod, so that the ejection angle of the high pressure nozzle is changed; moreover, the change speed of the ejection angle of the high pressure nozzle can be adjusted by controlling the oil feeding speed of the hydraulic cylinder, the most reasonable oil feeding speed is selected according to the diameter of the pump body and the distribution of high pressure nozzles and the best cleaning effect is achieved. The designed automatic high-pressure water cleaning device can automatically clean the accumulated dust on the inner wall of the pump body of the steam ejection pump in an interval of molten steel vacuum treatment.

Description

technical field [0001] The invention belongs to the technical field of external refining of molten steel, in particular to a design method of a high-pressure water automatic cleaning device for cleaning the ash accumulation on the inner wall of a steam jet pump pump. Background technique [0002] The water vapor jet pump is RH (in 1959, Ruhrstahl and Heraeus jointly developed the molten steel vacuum circulation degassing process, which was called by the first letter of the company. It is RH.), VD (Vacuum decarburization), VOD (Vacuum Oxygen decarburization) and other key equipment for vacuum refining. Its function is to pump the molten steel environment into a high vacuum state, which can reach about 67Pa, and produce high quality All the waste gas produced during the treatment of molten steel must be sucked away through the channel formed by the pump body of the vacuum pump. It will stick to its inner wall, and it will become thicker and thicker over time; when the dust is...

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Problems solved by technology

[0003] The disadvantages of manual cleaning are: due to the fast rhythm of molten steel treatment during normal production, the treatment interval of each furnace of steel is very short, the pump body cannot be cleaned after each treatment, and can only be cleaned during maintenance; When cleaning, the inlet hole of the vacuum pump must be opened, and the operator must insert the spray gun into the pump body to clean, which is time-consuming and laborious, and it is inevitable that some places cannot be cleaned during cleaning; at the same time, because the spray gun sprays high-pressure water of about 20MPa , if the operation is not careful, it will have unfavorable factors for the safety of the operator

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