CN107192714B - Method and system for measuring blockage degree of submerged nozzle - Google Patents
Method and system for measuring blockage degree of submerged nozzle Download PDFInfo
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- CN107192714B CN107192714B CN201710403787.XA CN201710403787A CN107192714B CN 107192714 B CN107192714 B CN 107192714B CN 201710403787 A CN201710403787 A CN 201710403787A CN 107192714 B CN107192714 B CN 107192714B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
Abstract
The invention provides a method and a system for measuring the blockage degree of a submerged nozzle, wherein the method comprises the following steps: rubbing the water gap attached with the plug by using rubbing equipment, and acquiring and sending rubbing data by using image acquisition equipment; determining a blockage degree value of the water gap according to the rubbing data; therefore, the blockage degree value is quantized into a specific value, the blockage degree of the submerged nozzle can be accurately evaluated, and the steelmaking level in the continuous casting process can be further evaluated quantitatively.
Description
Technical Field
The invention belongs to the technical field of steel making, and particularly relates to a method and a system for measuring the blockage degree of an immersion nozzle.
Background
The submerged nozzle commonly used in the metallurgical field is cylindrical in shape, a rectangular opening is formed in the side face of the bottom end of the submerged nozzle, a large number of plugs are collected around the outlet of the submerged nozzle along with pouring, the plugs can be inclusions in molten steel and refractory materials can fall off, the stability of a crystallizer flow field can be influenced along with continuous collection of the plugs, and therefore liquid level disturbance is caused, and a series of serious problems of slag rolling and the like which influence the quality of steel billets are caused.
In actual production, the blockage of the submerged nozzle is in a tumor shape and uneven, and is difficult to peel from a raw water port, the blockage degree of the submerged nozzle is evaluated by visual inspection in the prior art, general description is given according to experience, and the purpose of quantitatively evaluating the production level is not achieved by the empirical evaluation.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method and a system for measuring the blockage degree of a submerged nozzle, which are used for solving the technical problem that the steelmaking level cannot be quantitatively evaluated when the blockage degree of the submerged nozzle is evaluated by using a visual inspection method in the prior art.
The invention provides a method for measuring the blockage degree of a submerged nozzle, which comprises the following steps:
rubbing the water gap attached with the plug by using rubbing equipment;
acquiring and sending rubbing data by using image acquisition equipment;
and determining the blockage degree value of the water gap according to the rubbing data.
In the foregoing solution, the determining the clogging degree value of the nozzle according to the rubbing data includes:
determining the area of the plug according to the rubbing data;
determining a first blockage extent value for the nozzle based on the area of the blockage and the total area of the nozzle.
In the above scheme, the determining a clogging degree value of the nozzle according to the rubbing data further includes:
determining the residual area of the water gap according to the rubbing data;
and determining a second blockage degree value of the water gap according to the residual area of the water gap and the total area of the water gap.
In the above scheme, before rubbing the nozzle with the plug by using rubbing equipment, the method further comprises: and coating the coating agent on the water gap by using a coating device.
In the above scheme, the smearing agent comprises: paint or viscous type pigment, etc.
In the foregoing aspect, the rubbing the nozzle with the plug by using a rubbing device includes:
covering the water gap with light-colored covering cloth;
and rubbing the shapes of the water gap and the plug on the covering cloth by using the rubbing equipment.
In the above scheme, the covering cloth is provided with transverse scales and longitudinal scales.
In the above scheme, the covering cloth is a thin cotton cloth.
The present invention also provides a system for measuring a degree of clogging of a submerged entry nozzle, the system comprising:
the rubbing equipment is used for rubbing the water gap attached with the plug;
the image acquisition equipment is used for acquiring and sending rubbing data;
and the industrial personal computer is used for determining the blockage degree value of the water gap according to the rubbing data.
In the above scheme, the industrial personal computer is specifically used for:
determining the area of the plug according to the rubbing data;
and determining the blockage degree value of the water gap according to the area of the blockage and the total area of the water gap.
The invention provides a method and a system for measuring the blockage degree of a submerged nozzle, wherein the method comprises the following steps: rubbing the water gap attached with the plug by using rubbing equipment, and acquiring and sending rubbing data by using image acquisition equipment; determining a blockage degree value of the water gap according to the rubbing data; therefore, the blockage degree value is quantized into a specific value, the blockage degree of the submerged nozzle can be accurately evaluated, and the steelmaking level in the continuous casting process can be further evaluated quantitatively.
Drawings
FIG. 1 is a schematic flow chart of a method for measuring a blockage degree of a submerged nozzle according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a cover cloth according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a system for measuring a blockage degree of a submerged nozzle according to a second embodiment of the present invention.
Detailed Description
In order to solve the technical problem that the steelmaking level cannot be quantitatively evaluated when the degree of blockage of the submerged nozzle is evaluated by using an visual inspection method in the prior art, the invention provides a method and a system for measuring the degree of blockage of the submerged nozzle, wherein the method comprises the following steps: rubbing the water gap attached with the plug by using rubbing equipment, and acquiring and sending rubbing data by using image acquisition equipment; and determining the blockage degree value of the water gap according to the rubbing data.
The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.
Example one
The present embodiment provides a method for measuring a clogging degree of a submerged nozzle, as shown in fig. 1, the method comprising:
s101, rubbing the water gap with the plug by using rubbing equipment, and acquiring and sending rubbing data by using image acquisition equipment.
In this step, before rubbing the nozzle, a smearing device is used to smear a smearing agent on the nozzle and the plug. Here, the spreading agent needs to be a viscous type, non-flowable liquid such as: paint or viscous type pigment, etc. The coating agent used in this example was paint.
After smearing the water gap and the plug, the water gap attached with the plug can be rubbed by rubbing equipment, and the rubbing equipment specifically comprises: covering the water gap with light-colored covering cloth; the topography of the water gap and the plug is rubbed on the covering cloth by the rubbing equipment, and rubbing data of the plug on the covering cloth is acquired by the image acquisition equipment; wherein, referring to fig. 2, the covering cloth is preferably white thin cotton cloth, the covering cloth is provided with transverse scales and longitudinal scales, the transverse scales and the longitudinal scales form a grid shape, each grid has a certain area, the transverse scale range of the covering cloth is 100mm, and the longitudinal scale range of the covering cloth is 130 mm.
The image acquisition device may be a camera.
And after the rubbing data is obtained, sending the rubbing data to an industrial personal computer.
S102, determining the blockage degree value of the water gap according to the rubbing data.
In the step, after the industrial personal computer receives the rubbing data, the rubbing data needs to be analyzed, and the area of the plug on the covering cloth is obtained.
Specifically, the industrial personal computer calculates the coverage area of the blockage according to the transverse scale and the longitudinal scale on the covering cloth, firstly determines the number of first grids covered by the blockage on the covering cloth, and calculates the coverage area (namely the area of the blockage) according to the area of a unit grid and the number of the first grids. It should be noted that, when some grids are not completely filled, the determination of the effective first grid number is performed according to a rounding method.
A blockage level value for the nozzle is then determined based on the area of the blockage and the total area of the nozzle, where a greater first blockage level value indicates a more severely blocked nozzle.
Or, the industrial personal computer may also calculate the remaining area (i.e., the remaining area of the nozzle) of the covered cloth according to the horizontal scale and the vertical scale on the covered cloth, and similarly, the number of the second grids at the blank of the covered cloth needs to be determined, and the remaining area is calculated according to the area of the unit grid and the number of the second grids. It should be noted that, when some grids are not completely filled, the determination of the effective second grid number is performed according to a rounding method.
Then, determining the blockage degree value of the water gap according to the residual area of the water gap and the total area of the water gap. Here, a smaller second clogging degree value indicates a more serious nozzle clogging.
Therefore, a specific quantitative evaluation index can be provided for the degree of the blockage of the water gap.
Example two
In accordance with a first embodiment, the present embodiment provides a system for measuring a clogging degree of a submerged entry nozzle, as shown in fig. 3, the system comprising: rubbing equipment 31, image acquisition equipment 32 and an industrial personal computer 33; wherein the content of the first and second substances,
the rubbing device 31 is used for rubbing the water gap with the plug, and acquiring and sending rubbing data; before the nozzle is rubbed, smearing agent is smeared on the nozzle and the plug by using smearing equipment. Here, the spreading agent needs to be a viscous type, non-flowable liquid such as: paint or viscous type pigment, etc. The coating agent used in this example was paint.
After smearing the nozzle and the plug, rubbing the nozzle with the plug by using rubbing equipment 31, which specifically comprises: covering the water gap with light-colored covering cloth; the topography of the water gap and the plug is rubbed on the cover cloth by the rubbing equipment 31, and rubbing data of the plug on the cover cloth is acquired by the image acquisition equipment 32; wherein, referring to fig. 2, the covering cloth is preferably white thin cotton cloth, the covering cloth is provided with transverse scales and longitudinal scales, the transverse scales and the longitudinal scales form a grid shape, each grid has a certain area, the transverse scale range of the covering cloth is 100mm, and the longitudinal scale range of the covering cloth is 130 mm.
The image capture device 32 may be a camera.
After the rubbing data is acquired, the image acquisition device 32 sends the rubbing data to the industrial personal computer 33.
After the industrial personal computer 33 receives the rubbing data, the rubbing data needs to be analyzed, and the area of the plug on the covering cloth is obtained.
Specifically, the industrial personal computer 33 calculates the coverage area of the blockage according to the horizontal scale and the longitudinal scale on the covering cloth, first determines the number of first grids covered by the blockage on the covering cloth, and calculates the coverage area (i.e., the area of the blockage) according to the area of a unit grid and the number of the first grids. It should be noted that, when some grids are not completely filled, the determination of the effective first grid number is performed according to a rounding method.
A blockage level value for the nozzle is then determined based on the area of the blockage and the total area of the nozzle, where a greater first blockage level value indicates a more severely blocked nozzle.
Or, the industrial personal computer 33 may also calculate the remaining area of the covered cloth (i.e., the remaining area of the nozzle) according to the horizontal scale and the vertical scale on the covered cloth, and similarly, the number of the second grids at the blank position on the covered cloth needs to be determined, and the remaining area is calculated according to the area of the unit grid and the number of the second grids. It should be noted that, when some grids are not completely filled, the determination of the effective second grid number is performed according to a rounding method.
Then, determining the blockage degree value of the water gap according to the residual area of the water gap and the total area of the water gap. Here, a smaller second clogging degree value indicates a more serious nozzle clogging.
Therefore, a specific quantitative evaluation index can be provided for the degree of the blockage of the water gap.
EXAMPLE III
In practical application, when the measuring method provided in the first embodiment and the measuring apparatus provided in the second embodiment are used to measure the blockage degree of the submerged nozzle of a certain steel mill, the size of the submerged nozzle is 60mm wide × 80mm high, specifically as follows:
firstly, smearing the smearing agent on the water gap and the plug by using smearing equipment. Here, the spreading agent needs to be a viscous type, non-flowable liquid such as: paint or viscous type pigment, etc. The coating agent used in this example was paint.
After smearing the water gap and the plug, rubbing the water gap attached with the plug by using rubbing equipment, and the method specifically comprises the following steps: covering the water gap with light-colored covering cloth; the topography of the water gap and the plug is rubbed on the covering cloth by the rubbing equipment, and rubbing data of the plug on the covering cloth is acquired by the image acquisition equipment; wherein, referring to fig. 2, the covering cloth is preferably white thin cotton cloth, the covering cloth is provided with transverse scales and longitudinal scales, the transverse scales and the longitudinal scales form a grid shape, each grid has a certain area, the transverse scale range of the covering cloth is 100mm, and the longitudinal scale range of the covering cloth is 130 mm. Each grid in this example is 10mm x 10 mm.
The image acquisition device may be a camera.
And after the rubbing data is obtained, sending the rubbing data to an industrial personal computer.
And after the industrial personal computer receives the rubbing data, analyzing the rubbing data to obtain the residual area on the covering cloth. Firstly, the number of second grids at the blank position on the covering cloth needs to be determined, and the residual area is calculated according to the area of the unit grid and the number of the second grids. It should be noted that, when some grids are not completely filled, the determination of the effective second grid number is performed according to a rounding method. Here, the number of the second meshes is 101.5; the total area of the covering cloth is 100 x 130mm2Then the final calculated second occlusion degree value is 0.78.
Example four
In practical application, when the measuring method provided in the first embodiment and the measuring device provided in the second embodiment are used to measure the blockage degree of the submerged nozzle in a certain steel mill, the size of the submerged nozzle is 65mm wide × 85mm high, specifically as follows:
firstly, smearing the smearing agent on the water gap and the plug by using smearing equipment. Here, the spreading agent needs to be a viscous type, non-flowable liquid such as: paint or viscous type pigment, etc. The coating agent used in this example was paint.
After smearing the water gap and the plug, rubbing the water gap attached with the plug by using rubbing equipment, and the method specifically comprises the following steps: covering the water gap with light-colored covering cloth; the topography of the water gap and the plug is rubbed on the covering cloth by the rubbing equipment, and rubbing data of the plug on the covering cloth is acquired by the image acquisition equipment; wherein, referring to fig. 2, the covering cloth is preferably white thin cotton cloth, the covering cloth is provided with transverse scales and longitudinal scales, the transverse scales and the longitudinal scales form a grid shape, each grid has a certain area, the transverse scale range of the covering cloth is 100mm, and the longitudinal scale range of the covering cloth is 130 mm. Each grid in this example is 10mm x 10 mm.
The image acquisition device may be a camera.
And after the rubbing data is obtained, sending the rubbing data to an industrial personal computer.
And after the industrial personal computer receives the rubbing data, analyzing the rubbing data to obtain the residual area on the covering cloth. Firstly, the number of second grids at the blank position on the covering cloth needs to be determined, and the residual area is calculated according to the area of the unit grid and the number of the second grids. It should be noted that, when some grids are not completely filled, the determination of the effective second grid number is performed according to a rounding method. Here, the number of the second meshes is 83; the total area of the covering cloth is 100 x 130mm2Then the final calculated second occlusion degree value is 0.64.
Therefore, the blockage degree value of the submerged nozzle is accurately obtained.
The method and the system for measuring the blockage degree of the submerged nozzle provided by the embodiment of the invention have the following beneficial effects that:
the invention provides a method and a system for measuring the blockage degree of a submerged nozzle, wherein the method comprises the following steps: rubbing the water gap attached with the plug by using rubbing equipment to obtain and send rubbing data; determining a blockage degree value of the water gap according to the rubbing data; therefore, the blockage degree value is quantized into a specific value, the blockage degree of the submerged nozzle can be accurately evaluated, and the steelmaking level in the continuous casting process can be further evaluated quantitatively.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (8)
1. A method of measuring the degree of blockage of a submerged entry nozzle, the method comprising:
rubbing the water gap attached with the plug by using rubbing equipment;
acquiring and sending rubbing data by using image acquisition equipment;
determining a blockage degree value of the water gap according to the rubbing data; wherein the content of the first and second substances,
the determining a plug-off metric value for the nozzle from the rubbing data comprises:
determining the area of the plug according to the rubbing data;
determining a first blockage degree value of the water gap according to the area of the blockage and the total area of the water gap;
the determining the area of the blockage according to the rubbing data comprises: according to the number of first grids covered by the plugs on the covering cloth, calculating the covering area according to the area of the unit grid and the number of the first grids; when a mesh is not completely filled, determining the effective first mesh number is performed according to a rounding method.
2. The method of claim 1, wherein said determining a plug-degree value for said nozzle from said rubbing data further comprises:
determining the residual area of the water gap according to the rubbing data;
and determining a second blockage degree value of the water gap according to the residual area of the water gap and the total area of the water gap.
3. The method of claim 1, wherein prior to rubbing the nozzle with the plug with a rubbing apparatus, further comprising: and coating the coating agent on the water gap by using a coating device.
4. The method of claim 3, wherein the spreading agent comprises: paint or viscous type pigments.
5. The method of claim 1, wherein said rubbing said nozzle with said plug attached with a rubbing apparatus comprises:
covering the water gap with light-colored covering cloth;
and rubbing the shapes of the water gap and the plug on the covering cloth by using the rubbing equipment.
6. The method of claim 1, wherein the cover cloth is provided with a transverse scale and a longitudinal scale.
7. The method of claim 5, wherein the cover cloth is a tissue cloth.
8. A system for measuring the degree of clogging of a submerged entry nozzle, said system comprising:
the rubbing equipment is used for rubbing the water gap attached with the plug;
the image acquisition equipment is used for acquiring and sending rubbing data;
the industrial personal computer is used for determining the blockage degree value of the water gap according to the rubbing data;
the industrial personal computer is specifically used for:
determining the area of the plug according to the rubbing data;
determining a blockage degree value of the water port according to the area of the blockage and the total area of the water port;
the determining the area of the blockage according to the rubbing data comprises: according to the number of first grids covered by the plugs on the covering cloth, calculating the covering area according to the area of the unit grid and the number of the first grids; when a mesh is not completely filled, determining the effective first mesh number is performed according to a rounding method.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107891134A (en) * | 2017-12-12 | 2018-04-10 | 首钢集团有限公司 | A kind of method and device for determining nozzle blocking |
| CN109579902B (en) * | 2018-11-05 | 2021-03-23 | 首钢集团有限公司 | Crystallizer water gap blockage judging device and method |
| CN111257153B (en) * | 2020-02-12 | 2022-05-20 | 首钢集团有限公司 | Device and method for evaluating blockage degree of submerged nozzle |
| CN111678603B (en) * | 2020-06-09 | 2022-05-20 | 首钢集团有限公司 | Detection device and method for blockage degree of submerged nozzle |
| CN112296297B (en) * | 2020-09-30 | 2022-04-19 | 首钢集团有限公司 | Method for controlling water gap blockage and electronic equipment |
| CN113740349B (en) * | 2021-11-05 | 2022-02-08 | 深圳市兴盛达橡塑制品有限公司 | Online visual inspection subassembly of finished product plastic pipe |
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