Method for detecting sealing property of sealed container based on standard pressure vibration curve
A technology of sealing performance and detection method, which is applied in the direction of using liquid/vacuum degree for liquid tightness measurement and measuring the acceleration and deceleration rate of fluid, etc., can solve the problem of failure to realize automatic detection of furnace chamber sealing performance and failure to seal the effective leakage area of the container. Theoretical calculations, etc.
Active Publication Date: 2014-12-24
BAOSHAN IRON & STEEL CO LTD +1
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However, this detection method is empirical to a certain extent, and cannot theoretically calculate the effective leakage area of the airtight container, and cannot realize the automation of the detection of the sealing performance of the furnace cavity
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[0104] The present invention is implemented in the air tightness detection of the RCS furnace chamber of a continuous annealing unit. After the furnace chamber sealing work is completed, the furnace chamber is first charged or depressurized to a certain pressure, and then the pressurization or depressurization is stopped. There is inevitably leakage in the furnace cavity, and the pressure in the furnace cavity changes gradually. When the pressure in the furnace cavity changes to a certain pressure (400daPa for positive pressure test, -270daPa for negative pressure test), the air tightness test will start. This time will be taken as the zero time point. Every certain time (take 30 seconds), record the pressure, when it reaches a certain time (take 6 hours), write down the pressure at that moment and end the pressure recording, thus get a pressure change curve, compare the pressure curve with the standard Compared with the pressure curve of the furnace chamber, it can be judged w...
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The invention provides a method for detecting the sealing property of a sealed container based on a standard pressure vibration curve. The detection method is applied to sealing property detection of a continuous annealing unit and a high-hydrogen industrial electric furnace of a continuous zinc-plating unit. The detection method comprises the following steps of: establishing a standard pressure curve theoretical model; detecting an actual value; carrying out software implementation and sealing property judgment; comparing a pressure curve with a standard pressure curve; and judging whether the sealing property of a furnace chamber meets requirements or not. Compared with the prior art, the detection method provided by the invention has the advantages that the sealing property of the furnace chamber is automatically detected, and an effective leakage area of the furnace cavity is automatically calculated.
Description
technical field [0001] The invention relates to the field of airtightness detection of airtight containers, in particular, the invention relates to a method for airtightness inspection of airtight containers based on a standard pressure change curve, and the detection method is applied to high-hydrogen industrial electric furnaces of continuous annealing units and continuous galvanizing units Seal performance testing. Background technique [0002] In the field of metallurgy, high-hydrogen industrial electric furnace is a typical sealed container, which is used in continuous annealing units and continuous galvanizing units. If the high-hydrogen industrial electric furnace leaks during use, and the leakage exceeds the allowable range, not only the product quality will be affected, but in severe cases, it may cause serious consequences such as fire, explosion, and harmful gas overflow, causing irreparable losses. [0003] For this reason, when the new unit is delivered for use...
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IPC IPC(8): G01M3/32
Inventor 杜国强胡洪国刘博周保辉张杰
Owner BAOSHAN IRON & STEEL CO LTD