CN-122028992-A - Molten metal leakage detection device, molten metal leakage detection method, and metal continuous casting method

CN122028992ACN 122028992 ACN122028992 ACN 122028992ACN-122028992-A

Abstract

Provided is a molten metal leakage detection device capable of suppressing erroneous detection of molten metal leakage. A molten metal leakage detection device for detecting leakage of molten metal from molten metal processing equipment includes an imaging unit for imaging molten metal processing equipment at predetermined time intervals to generate image data, a data acquisition unit for acquiring time-series data indicating the number of pixels of a specific color included in a predetermined area of the image data, and a detection unit for detecting occurrence of leakage of molten metal using the time-series data.

Inventors

KUBOTA YUJI
IDO HIROHARU
KONDO HIROAKI

Assignees

杰富意钢铁株式会社

Dates

Publication Date: 20260512
Application Date: 20240920
Priority Date: 20231027

Claims (9)

1. A molten metal leakage detection device for detecting leakage of molten metal from a molten metal processing apparatus, wherein the molten metal leakage detection device comprises: an imaging unit that images the molten metal processing device at predetermined time intervals to generate image data; A data acquisition unit for acquiring time-series data representing the number of pixels of a specific color included in a predetermined region of the image data, and And a detection unit for detecting the occurrence of leakage of the molten metal by using the time-series data.
2. The molten metal leakage detecting device according to claim 1, wherein, The detection unit measures a duration in which the number of pixels representing a specific color continues to be equal to or greater than a reference number, using the time-series data, and detects that the molten metal leaks when the duration is equal to or greater than a predetermined threshold.
3. The molten metal leakage detecting device according to claim 1, wherein, The detection unit measures an integrated value indicating the number of pixels of a specific color using the time-series data, and detects that the molten metal leaks when the integrated value is equal to or greater than a predetermined threshold value for a predetermined period of time.
4. The molten metal leakage detecting device according to any one of claim 1 to claim 3, wherein, The molten metal processing apparatus is a continuous casting machine for metal, The imaging unit is provided at a position where imaging can be performed below the mold.
5. A leakage detection method of molten metal that detects leakage of molten metal from a molten metal processing apparatus, wherein the leakage detection method of molten metal comprises: a photographing step of photographing the molten metal processing apparatus at predetermined time intervals to generate image data; A data acquisition step of acquiring time-series data representing the number of pixels of a specific color included in a predetermined region of the image data, and And a detection step of detecting the occurrence of leakage of the molten metal using the time-series data.
6. The method for detecting leakage of molten metal according to claim 5, wherein, In the detecting step, a duration in which the number of pixels representing a specific color continues to be equal to or greater than a reference number is measured using the time-series data, and the occurrence of the leakage of the molten metal is detected when the duration is equal to or greater than a predetermined threshold.
7. The method for detecting leakage of molten metal according to claim 5, wherein, In the detecting step, an integrated value indicating the number of pixels of a specific color is measured using the time-series data, and the occurrence of the leakage of the molten metal is detected when the integrated value is equal to or greater than a predetermined threshold value for a predetermined period of time.
8. The leakage detection method for molten metal according to any one of claim 5 to claim 7, wherein, The molten metal processing apparatus is a continuous casting machine for metal, In the photographing step, the lower side of the mold is photographed to generate image data.
9. A method for continuously casting a metal, wherein, When the leakage of the molten metal is detected by the method for detecting leakage of the molten metal according to claim 8, the supply of the molten metal to the mold is stopped.

Description

Molten metal leakage detection device, molten metal leakage detection method, and metal continuous casting method Technical Field The present invention relates to a molten metal leakage detection device that detects leakage of molten metal from a molten metal processing apparatus, a molten metal leakage detection method, and a continuous casting method of metal using the molten metal leakage detection method. Background In an apparatus for treating molten metal, an accident involving extremely large damage to the apparatus, such as leakage of molten metal, inevitably occurs. Therefore, when leakage of molten metal occurs, it is necessary to detect the leakage rapidly, and to prevent the expansion of damage to the equipment. As a typical countermeasure, there is an emergency casting suspension treatment in which supply of molten metal or the like to the target equipment is stopped. Conventionally, detection of abnormal conditions such as leakage of molten metal and countermeasures against damage expansion have been generally performed by operators. The operator can judge the abnormal state by visual or sound perception and press the button for stopping the supply of molten steel to the object equipment. In this way, when an abnormal state is detected and an expansion operation is prevented depending on an operator, the detection of the abnormal state is slow due to the characteristics of the operator, the work load at the time of occurrence of the abnormality, and the like, and thus, there is a case where a great damage to equipment occurs. In order to solve such a problem, patent document 1 discloses a method and an apparatus for automatically detecting a steel leakage accident (steel leakage) and preventing damage from being increased, which are abnormal conditions occurring in a continuous casting process. Here, the steel leakage means an abnormal state in which the outer skin of the cast piece breaks due to some cause and molten steel is discharged from the inside. According to patent document 1, a cast piece in continuous casting is shot, and when the number of pixels representing a predetermined specific color among pixels constituting the obtained image data exceeds a predetermined threshold value, it is determined that a steel leakage has occurred. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 2001-269770 Disclosure of Invention Problems to be solved by the invention In patent document 1, the occurrence of steel leakage, i.e., the occurrence of an abnormal state in a continuous casting apparatus is detected using the instantaneous value of a pixel. However, in the continuous casting apparatus, even in a sound casting operation in which no steel leakage occurs, a scattering spark of molten metal is generated around a slab under casting due to splashing of molten metal or the like. The scattered spark is substantially the same as the color tone of the molten metal leaked when the steel leakage occurs. Therefore, there is a problem that scattered sparks of molten metal in a sound casting operation are erroneously detected as steel leakage. The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide a molten metal leakage detection device and a molten metal leakage detection method that can suppress erroneous detection of molten metal leakage. Another object of the present invention is to provide a continuous casting method of metal using a leakage detection method of molten metal. Means for solving the problems Means for solving the above problems are as follows. [1] A molten metal leakage detection device for detecting leakage of molten metal from a molten metal processing apparatus includes an imaging unit that images the molten metal processing apparatus at predetermined time intervals to generate image data, a data acquisition unit that acquires time-series data indicating the number of pixels of a specific color included in a predetermined region of the image data, and a detection unit that detects occurrence of leakage of molten metal using the time-series data. [2] The molten metal leakage detecting device according to [1], wherein the detecting unit measures a duration in which the number of pixels representing a specific color is equal to or greater than a reference number using the time-series data, and detects that the molten metal is leaked when the duration is equal to or greater than a predetermined threshold. [3] The molten metal leakage detecting device according to [1], wherein the detecting unit measures an integrated value indicating the number of pixels of a specific color using the time-series data, and detects that the molten metal is leaked when the integrated value is equal to or greater than a predetermined threshold value for a predetermined period of time. [4] The molten metal leakage detecting device according to any one of [1] to [3], wherein the molten metal proce