CN212598764U - Calibration device for checking liquid level of molten steel in crystallizer of bloom continuous casting machine - Google Patents
Calibration device for checking liquid level of molten steel in crystallizer of bloom continuous casting machine Download PDFInfo
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- CN212598764U CN212598764U CN202020544873.XU CN202020544873U CN212598764U CN 212598764 U CN212598764 U CN 212598764U CN 202020544873 U CN202020544873 U CN 202020544873U CN 212598764 U CN212598764 U CN 212598764U
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Abstract
The utility model provides a bloom conticaster crystallizer molten steel liquid level check-up scale device, belongs to continuous casting equipment technical field for improve the detection accuracy of crystallizer molten steel liquid level. The technical scheme is as follows: the sectional area of the calibration block is equal to the size of a copper pipe orifice of the crystallizer, vertical check rings are arranged around the upper surface of the calibration block, the lower ends of the check rings are welded with the edges of the upper surface of the calibration block, the heights of the check rings are consistent, and the protective slag required by normal production with uniform thickness is laid in the check rings. The retaining ring is a thin iron plate, the height of the retaining ring is 30mm, and the covering slag laid in the retaining ring is flush with the height of the retaining ring. The utility model discloses broken through conventional conticaster crystallizer molten steel liquid level check-up scale device's structure, had simple structure, reasonable in design, convenient operation, the fabulous advantage of effect, fundamentally has thoroughly solved crystallizer molten steel liquid level and has shown unsafe difficult problem, provides new equipment for improving the casting blank quality, has apparent economic benefits.
Description
Technical Field
The utility model relates to a be suitable for big square billet conticaster crystallizer molten steel liquid level check-up scale device belongs to continuous casting equipment technical field.
Background
In order to ensure the surface quality of the strand in a continuous casting machine and to reduce metal inclusions in the strand, a stable and constant mold level is a necessary prerequisite. The adoption of optimized dynamic control behavior in crystallizer liquid level control to balance the flow of unstable molten steel is a very important technical measure. Firstly, the high operation rate of the continuous casting machine can be ensured; secondly, inclusions on the surface and in the casting blank can be obviously reduced, the casting blank slag inclusion and slag entrapment caused by frequent liquid level fluctuation and large wave amplitude are avoided, and the qualified rate of the casting blank is improved; the surface defects of the casting blank, such as cracks, slag streaks and the like, can be greatly reduced, and the quality of the surface and the subsurface of the casting blank is improved.
At present, automatic control of the liquid level of molten steel in a crystallizer of a continuous casting machine becomes an essential technological means for high-efficiency continuous casting and high-quality continuous casting, and is an effective measure for improving the surface quality, the subcutaneous slag inclusion and the internal quality of a casting blank. The detection precision and accuracy of the liquid level of the molten steel in the crystallizer are particularly important. However, the traditional calibration device and method for the crystallizer of the continuous casting machine have the defects that the actual liquid level of molten steel in the crystallizer is not consistent with the display liquid level in height, the difference is large, when the actual liquid level is 75%, the display liquid level is high and reaches over 88%, the deviation is large, and hidden dangers exist in the aspect of control safety. To change this situation, the skilled person investigated the causes of the level difference. In the cold test, the calibration block is placed 70mm below the copper nozzle of the crystallizer, with a measuring range of 40mm to 160mm, the liquid level is detected as 65% without covering slag, and the liquid level reaches 73% after covering slag of about 30mm is added. The mold flux has a very significant influence on the liquid level detection. The reason for this is that the radiation source rays pass through a medium with a certain density and are attenuated, such as a steel plate, water, and mold powder, and the intensity of the attenuation is affected by the density, distance, and other factors, so that for a crystallizer with a large cross section, the thickness of the mold powder can significantly affect the reception of the rays, and further the detection accuracy of the molten steel level of the crystallizer is affected.
In order to better improve the accuracy of the actual liquid level of molten steel in the crystallizer and improve the surface and subcutaneous quality of a casting blank, the improvement of the conventional crystallizer molten steel level calibration device and method is necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a bloom conticaster crystallizer molten steel liquid level check-up scale device is provided, molten steel state in the crystallizer when this kind of device can simulate normal production as far as possible when making crystallizer molten steel liquid level check-up scale can improve the degree of accuracy that liquid level detected, provides effectual technical support for improving the casting blank quality.
The technical scheme for solving the technical problems is as follows:
the calibration device comprises a calibration block, the sectional area size of the calibration block is equivalent to the size of a copper pipe opening of a crystallizer, a vertical check ring is arranged around the upper surface of the calibration block, the lower end of the check ring is welded and connected with the edge of the upper surface of the calibration block, the height of the check ring is consistent, and covering slag with uniform thickness required by normal production is laid in the check ring.
According to the calibration device for checking the liquid level of the molten steel in the crystallizer of the bloom continuous casting machine, the check ring is a thin iron plate, the height of the check ring is 30mm, and the covering slag paved in the check ring is flush with the height of the check ring.
The utility model has the advantages that:
the utility model discloses on the basis of original crystallizer molten steel liquid level check-up scale, welded the thin iron plate retaining ring of 30mm height around the upper surface of demarcation piece, laid the even covering slag of 30mm thickness in the retaining ring of demarcation piece upper surface, molten steel state in the crystallizer when making crystallizer molten steel liquid level check-up scale simulate normal production as far as possible to satisfy the degree of accuracy that liquid level detected, guarantee control accuracy and technological requirement.
The utility model discloses a conticaster crystallizer molten steel liquid level check-up scale device's initiative has broken through conventional conticaster crystallizer molten steel liquid level check-up scale device, has simple structure, reasonable in design, convenient operation, the fabulous advantage of effect, and fundamentally has thoroughly solved crystallizer molten steel liquid level and has detected and show unsafe difficult problem, provides new equipment for improving the casting blank quality, has apparent economic benefits.
Drawings
FIG. 1 is a schematic structural diagram of a calibration device for checking the molten steel level of a crystallizer of a continuous casting machine.
The figures are labeled as follows: crystallizer 1, calibration block 2, retaining ring 3, radiation source 4, receiver 5.
Detailed Description
The utility model discloses a conticaster crystallizer molten steel liquid level check-up scale device comprises calibration block 2, retaining ring 3 and covering slag.
The sectional area of the calibration block 2 is equivalent to the size of a copper pipe orifice of the crystallizer 1, the periphery of the upper surface of the calibration block 2 is surrounded by vertical check rings 3, each check ring 3 is a thin iron plate, the lower ends of the check rings 3 are welded with the edge of the upper surface of the calibration block 2, the height of each check ring 3 is consistent, and the check rings 3 are internally paved with covering slag with uniform thickness required by normal production.
The height of the retainer ring 3 is shown to be 30mm, and the mold flux laid in the retainer ring 3 is flush with the height of the retainer ring 3.
After about 30mm of covering slag is added, the covering slag has obvious influence on the receiving of radioactive source rays, and the influence is the same as the actual state of molten steel liquid level detection in the crystallizer 1, so that the calibration scale for the molten steel liquid level of the crystallizer of the continuous casting machine under the condition of containing the covering slag can simulate the actual condition of the molten steel in the crystallizer 1, and the influence of the molten steel liquid level of the covering slag is eliminated according to the data obtained by detecting the molten steel liquid level in the crystallizer 1 by the calibration scale corrected under the condition of containing the covering slag, so that an accurate detection result can be obtained.
The utility model discloses a method of use adopts following step to go on:
a. the crystallizer casting powder is fully paved in a retaining ring 3 with the height of 30mm at the upper part of the calibration block 2, under the condition that cooling water exists in the crystallizer 1, the calibration block 2 is hung into the crystallizer 1, so that the upper surface of the calibration block 2 is lowered to the value N counted at the moment under the lower limit of the measuring range, and the value N is used as the set value of N0;
b. the calibration block 2 is lifted by 12mm, and the count at the moment is recorded as the set value of n 1;
c. then, the calibration block 2 is lifted up by 12mm, and the count at the moment is recorded as a set value of n 2;
d. repeating the above operations, lifting the calibration block 2 by 12mm each time, and recording the set values of the counts at the time as n3, n4, n5, n6, n7, n8, n9 and n 10;
e. inputting n 0-n 10 into the secondary instrument completion scale.
Use the utility model discloses a conticaster crystallizer molten steel liquid level check-up scale device carries out the scale to the instrument and revises the back, can detect crystallizer molten steel liquid level at the actual smelting in-process with the instrument of new scale to carry out automatic control to crystallizer molten steel liquid level. Because the instrument with the new scale corrects the influence of the thickness of the covering slag on the ray reception, the detection result can accurately reflect the liquid level of the molten steel of the crystallizer, the problem of inaccurate liquid level detection and display of the molten steel of the crystallizer is fundamentally and thoroughly solved, the detection accuracy is improved, technical support is provided for improving the quality of casting blanks, and the instrument has remarkable economic benefit.
Claims (2)
1. The utility model provides a big square billet conticaster crystallizer molten steel liquid level check-up scale device, it includes calibration block (2), and calibration block (2) sectional area size is equivalent with crystallizer (1) copper nozzle size, its characterized in that: the periphery of the upper surface of the calibration block (2) is surrounded by a vertical check ring (3), the lower end of the check ring (3) is welded with the edge of the upper surface of the calibration block (2), the height of the check ring (3) is consistent, and the required protective slag with uniform thickness for normal production is laid in the check ring (3).
2. The calibration device for checking the molten steel level of the crystallizer of the bloom continuous casting machine according to claim 1, wherein: the retaining ring (3) is a thin iron plate, the height of the retaining ring (3) is 30mm, and the covering slag laid in the retaining ring (3) is flush with the height of the retaining ring (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020544873.XU CN212598764U (en) | 2020-04-14 | 2020-04-14 | Calibration device for checking liquid level of molten steel in crystallizer of bloom continuous casting machine |
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| CN202020544873.XU CN212598764U (en) | 2020-04-14 | 2020-04-14 | Calibration device for checking liquid level of molten steel in crystallizer of bloom continuous casting machine |
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| CN212598764U true CN212598764U (en) | 2021-02-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111421120A (en) * | 2020-04-14 | 2020-07-17 | 石家庄钢铁有限责任公司 | Calibration device and method for checking liquid level of molten steel in crystallizer of bloom continuous casting machine |
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2020
- 2020-04-14 CN CN202020544873.XU patent/CN212598764U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111421120A (en) * | 2020-04-14 | 2020-07-17 | 石家庄钢铁有限责任公司 | Calibration device and method for checking liquid level of molten steel in crystallizer of bloom continuous casting machine |
| CN111421120B (en) * | 2020-04-14 | 2024-08-02 | 石家庄钢铁有限责任公司 | Device and method for calibrating molten steel level of crystallizer of bloom continuous casting machine |
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