CN117816949A - Molten steel depth measuring device of continuous casting crystallizer and control method - Google Patents
Molten steel depth measuring device of continuous casting crystallizer and control method Download PDFInfo
- Publication number
- CN117816949A CN117816949A CN202311763365.5A CN202311763365A CN117816949A CN 117816949 A CN117816949 A CN 117816949A CN 202311763365 A CN202311763365 A CN 202311763365A CN 117816949 A CN117816949 A CN 117816949A
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- Prior art keywords
- molten steel
- measuring
- depth
- continuous casting
- crystallizer
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/18—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring depth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/18—Measuring arrangements characterised by the use of mechanical techniques for measuring depth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid Mechanics (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a device for measuring the molten steel depth of a continuous casting crystallizer and a control method, wherein the device for measuring the molten steel depth of the continuous casting crystallizer comprises the following components: the measuring device comprises a reference part, a handle and a measuring part, wherein the handle is connected with the reference part, the reference part is provided with a reference surface, the measuring part is provided with a measuring rod, and the measuring rod is detachably arranged on the measuring part. The actual depth of the pouring basket nozzle inserted into molten steel and the actual depth of the crystallizer molten steel can be accurately and rapidly measured, and the depth of the pouring basket nozzle inserted into the molten steel can be accurately controlled.
Description
Technical Field
The invention relates to the field of steel production, in particular to a device for measuring the molten steel depth of a continuous casting crystallizer and a control method.
Background
In continuous casting production, the fluctuation of the molten steel level in the crystallizer must be kept in a certain range, otherwise, the quality of the drawn blank is directly affected. On one hand, the continuous casting tundish bears molten steel for a long time, a steel plate at the bottom of the tundish is deformed, a preset liquid level detection system is deviated, the depth of molten steel cannot be accurately measured and adjusted, the intermediate flow is 2-3 cm lower than the side flow, the depth of each flow of submerged nozzle inserted into molten steel is different, the process control requirement cannot be met, the insertion depth is shallow, the liquid level slag of a crystallizer is easy to cause in the casting process, the insertion depth is deep, the casting slag melting effect is poor, the molten steel impact depth is increased, and casting blank demoulding and primary cooling are influenced; on the other hand, the collection of the liquid level of the molten steel in the crystallizer is not accurate any more, the liquid level depth displayed by monitoring deviates from the actual depth, and the liquid level depth cannot be reflected correctly. Therefore, as the equipment age increases, the actual depth of the nozzle into molten steel and the actual depth measurement error of the molten steel are large and the control is not accurate enough in actual production.
Disclosure of Invention
The invention aims to provide a device and a method for measuring the molten steel depth of a continuous casting crystallizer, which can accurately and rapidly measure the actual depth of a tundish nozzle inserted into molten steel and the actual depth of the molten steel of the crystallizer, and accurately control the depth of the tundish nozzle inserted into the molten steel.
A molten steel depth measuring device of a continuous casting crystallizer, comprising: the measuring device comprises a reference part, a handle and a measuring part, wherein the handle is connected with the reference part, the reference part is provided with a reference surface, the measuring part is provided with a measuring rod, and the measuring rod is detachably arranged on the measuring part.
In one embodiment, the measuring part is provided with a jack and a first fastening piece, the measuring rod is inserted into the jack, and the first fastening piece penetrates through the side wall of the jack to lock the measuring rod.
In one embodiment, the measuring rod is a hollow tube.
In one embodiment, the handle is provided with a lifting portion, and the handle is connected with the reference portion through the lifting portion.
In one embodiment, the reference portion is provided with a telescopic rod capable of telescopic movement, and one end of the telescopic rod is provided with the reference surface.
In one embodiment, the reference portion is provided with a movable hole, the telescopic rod is slidably inserted into the movable hole, a second fastening piece is arranged on the side wall of the movable hole, and the second fastening piece penetrates through the side wall of the movable hole to fix the telescopic rod.
In one embodiment, the end of the measuring rod is provided with an L-shaped hook.
A molten steel depth control method of a continuous casting crystallizer comprises the following steps: measuring the molten steel depth of the continuous casting crystallizer by using the measuring device of any one of the above, installing a measuring rod on the installation part, taking a standard surface on the crystallizer, abutting the standard surface of the standard part against the standard surface of the crystallizer, inserting the measuring rod into the molten steel, melting the measuring rod inserted into the molten steel by the molten steel, and obtaining the molten steel depth according to the melted position of the measuring rod; or the measuring device is used for measuring the depth of the pouring basket nozzle inserted into molten steel, the measuring rod is arranged on the mounting part, a standard surface is taken on the crystallizer, the standard surface of the standard part is abutted against the standard surface of the crystallizer, the measuring rod is inserted into the molten steel, the L-shaped hook of the measuring rod hooks the lower end surface of the pouring basket nozzle, and the depth of the pouring basket nozzle inserted into the molten steel is obtained according to the melted position of the measuring rod.
In one embodiment, the method for controlling the molten steel depth of the continuous casting crystallizer further comprises the following steps: and when the molten steel depth of the continuous casting crystallizer or the molten steel insertion depth of the tundish nozzle is measured, loosening the second fastening piece, enabling the telescopic rod to slide in the movable hole until the datum surface of the datum part abuts against the standard surface of the crystallizer, and locking the second fastening piece.
In one embodiment, the method for controlling the molten steel depth of the continuous casting crystallizer further comprises the following steps: selecting the upper surface of the crystallizer flange as the standard surface, and calibrating the crystallizer molten steel depth displayed by a control system according to the obtained continuous casting crystallizer molten steel depth; or, according to the depth of the pouring basket nozzle inserted into molten steel and the depth of the molten steel of the continuous casting crystallizer, adjusting the depth of the molten steel of the continuous casting crystallizer to ensure that the depth of the pouring basket nozzle inserted into the molten steel is within a rated range.
Compared with the prior art, the continuous casting crystallizer molten steel depth measuring device and the control method have the advantages that:
1. with the increase of service life, the bottom of the tundish and the crystallizer can deform, the difference between the original set liquid level depth of the molten steel and the actual depth is larger, and the actual depth of the tundish nozzle inserted into the molten steel and the actual depth of the crystallizer molten steel can be accurately and rapidly measured by using the continuous casting crystallizer molten steel depth measuring device, so that the depth of the tundish nozzle inserted into the molten steel can be accurately controlled. The invention adopts the mode that the measuring rod melts in molten steel to measure the immersion depth of the molten steel, can measure the immersion depth of the molten steel in a working state, has real and accurate measured value, and can be conveniently replaced due to the fact that the measuring rod is detachable.
2. The end of the measuring rod is provided with an L-shaped hook which can hook the end face of the total ladle nozzle, thereby obtaining the depth of the tundish nozzle inserted into molten steel.
3. The measuring rod adopts a hollow iron pipe or a hollow steel pipe, so that the rigidity of the measuring rod can be ensured, the measuring rod is vertically inserted into fresh water, the contact area of molten steel can be increased, the measuring rod is melted in a short time, and the measuring efficiency is improved.
The invention will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate embodiments of the invention.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a structure in which a measuring rod of a molten steel depth measuring device of a continuous casting crystallizer is a straight rod;
FIG. 2 is a schematic diagram of a structure in which an L-shaped hook is arranged on a measuring rod of a molten steel depth measuring device of a continuous casting crystallizer according to an embodiment of the invention;
FIG. 3 is a schematic diagram showing a method for using the device for measuring the molten steel depth of the continuous casting mold according to the embodiment of the invention.
The device comprises a tundish nozzle 1, a tundish nozzle 2, a crystallizer flange 21, a standard surface 3, a molten steel liquid level 4, a continuous casting crystallizer molten steel depth measuring device 5, a reference part 51, a reference surface 52, a telescopic rod 53, a movable hole 54, a second fastening piece 6, a handle 61, a lifting part 7, a measuring part 71, a measuring rod 72, an inserting hole 73, a first fastening piece 74 and an L-shaped hook.
Detailed Description
Embodiments of the present invention will now be described with reference to the accompanying drawings.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 3, the molten steel depth measuring device 4 of the continuous casting mold of the present embodiment comprises: the measuring device comprises a reference part 5, a handle 6 connected with the reference part 5 and a measuring part 7, wherein the reference part 5 is provided with a reference surface 51, the measuring part 7 is provided with an installation part and a measuring rod 71, and the measuring rod 71 is detachably installed on the installation part. The mounting portion is provided with a socket 72, a first fastener 73, and the measuring rod 71 is inserted into the socket 72, and the first fastener 73 passes through a side wall of the socket 72 to lock the measuring rod 71. In this embodiment, the first fastening member 73 is a screw, a first screw hole is formed in the side wall of the insertion hole 72, and the first fastening member 73 is inserted into the first screw hole and abuts against the measuring rod 71 to be screwed and locked. But not limited to, the first fastener 73 may also be an interference fit dowel pin or other structure.
The measuring rod 71 forms an included angle with the reference surface 51, and the reference surface 51 is used for standardizing the posture of the measuring rod 71, so that the measuring rod 71 keeps a vertical posture and is immersed in molten steel, and errors caused by deflection are avoided. In this embodiment, the measuring rod 71 forms a frontal angle of 90 ° with the reference plane 51, the upper surface of the crystallizer flange 2 is horizontal, and the measuring rod 71 is inserted vertically into the fresh water.
In this embodiment, the measuring rod 71 is made of a material that can be melted by the molten steel of the mold, and "melting" herein includes all melting or partial melting as long as the molten steel melts the measuring rod 71 to a position where the level 3 of the molten steel immersed by the molten steel can be seen.
The measuring rod 71 and the mounting portion are detachably mounted, and the measuring rod 71 can be replaced easily. The temperature of the molten steel in the crystallizer is 1520-1530 ℃, the measuring rod 71 can be melted by the molten steel when being inserted into the molten steel, and preferably, the measuring rod 71 is melted in 3-5 seconds when being inserted into the molten steel, so that the rigidity of the measuring rod 71 is ensured, the measuring rod 71 can be inserted into the molten steel to a sufficient depth, and the measurement aging is ensured. In this embodiment, the measuring rod 71 is a hollow tube. The measuring rod 71 is designed into a hollow tube, so that the rigidity of the measuring rod 71 can be ensured, the measuring rod 71 is kept vertical, the contact area between molten steel and the measuring rod 71 can be increased, the measuring rod 71 is melted in 3-5 seconds, and the detection efficiency is improved. Preferably, the measuring rod 71 is a hollow steel pipe or a hollow iron pipe, and the rigidity of the measuring rod can ensure that the measuring rod 71 can be inserted into molten steel in a vertical posture to a sufficient depth, and can be melted in the molten steel, so that the molten steel is not polluted after the measuring rod is melted.
The reference portion 5 is provided with a telescopic rod 52 which can be extended and retracted, and one end of the telescopic rod 52 is provided with a reference surface 51. The telescoping rod 52 may be a sliding telescoping or a cylinder telescoping. In this embodiment, the reference portion 5 is provided with a movable hole 53, the telescopic rod 52 is slidably inserted into the movable hole 53, the side wall of the movable hole 53 is provided with a second fastening member 54, and the second fastening member 54 passes through the side wall of the movable hole 53 to fix the telescopic rod 52. In this embodiment, the second fastening member 54 is a screw, the side wall of the movable hole 53 is provided with a second screw hole, and the second fastening member 54 is inserted into the second screw hole and abuts against the telescopic rod 52, and is locked in a threaded fit manner. But not limited to, the second fastener 54 may also be an interference fit dowel pin or other structure.
The measuring rod 71 may be a straight rod or the end of the measuring rod 71 may be provided with an L-shaped hook 74.
When the measuring device is used for measuring, a plurality of methods for measuring and controlling the molten steel depth of the continuous casting crystallizer exist:
in measuring the depth of the molten steel in the crystallizer, the method 1 is as follows: mounting the measuring rod 71 on the mounting part, taking a standard surface 21 on the crystallizer, abutting the standard surface 51 of the reference part 5 against the standard surface 21 of the crystallizer, inserting the measuring rod 71 into molten steel, melting the measuring rod 71 inserted into the molten steel by the molten steel, and obtaining the depth of the molten steel according to the melted position of the measuring rod 71 and the position of the standard surface 21; the method 2 is as follows: the measuring rod 71 is inserted into molten steel to the bottom, and the molten steel depth is measured by measuring the melted length of the measuring rod 71. The difference between method 1 and method 2 is whether the measuring rod 71 is inserted into the bottom surface of the mold.
When measuring the depth of the pouring spout 1 inserted into molten steel, the measuring rod 71 is installed on the installation part, a standard surface 21 is taken on the crystallizer, the standard surface 51 of the standard part 5 is abutted against the standard surface 21 of the crystallizer, the measuring rod 71 is inserted into molten steel, the L-shaped hook 74 of the measuring rod 71 hooks the lower end surface of the pouring spout 1, the depth of the pouring spout 1 inserted into molten steel is obtained according to the melted position of the measuring rod 71, and the distance between the melted position of the measuring rod 71 and the position of the upper surface of the L-shaped hook is the depth of the pouring spout 1 inserted into molten steel.
When the molten steel depth of the continuous casting mold or the molten steel insertion depth of the tundish nozzle 1 is measured, the second fastening piece 54 is loosened, the telescopic rod 52 slides in the movable hole 53 until the datum surface 51 of the datum part 5 abuts against the upper surface of the mold flange 2, and the second fastening piece 54 is locked. Specifically, when measuring the molten steel depth of the continuous casting mold, the second fastening member 54 is loosened, the measuring rod 71 is inserted into the molten steel until reaching the bottom of the mold, the telescopic rod 52 is slid in the movable hole 53 until the reference surface 51 of the reference portion 5 abuts against the upper surface of the flange 2 of the mold, and the melted length of the measuring rod 71, that is, the molten steel depth is measured. When the depth of the pouring spout 1 inserted into molten steel is measured, the second fastening piece 54 is loosened, the L-shaped hook 74 of the measuring rod 71 hooks the lower end face of the pouring spout 1, the telescopic rod 52 slides in the movable hole 53 until the reference surface 51 of the reference part 5 abuts against the upper surface of the crystallizer flange 2, and the length from the upper surface of the L-shaped hook 74 of the measuring rod 71 to the molten position of the measuring rod 71 is the depth of the pouring spout 1 inserted into molten steel.
Finally, calibrating the crystallizer molten steel depth displayed by the control system according to the obtained continuous casting crystallizer molten steel depth; according to the depth of the tundish nozzle 1 inserted into molten steel and the depth of the molten steel of the continuous casting crystallizer, the depth of the molten steel of the continuous casting crystallizer is adjusted, so that the depth of the tundish nozzle 1 inserted into the molten steel is within a rated range.
With the increase of the service life, the bottom of the tundish and the crystallizer can deform, the difference between the originally set liquid level depth of the molten steel and the actual depth is larger and larger, and the actual depth of the tundish nozzle 1 inserted into the molten steel and the actual depth of the molten steel of the crystallizer can be accurately and rapidly measured by using the continuous casting crystallizer molten steel depth measuring device 4, so that the depth of the tundish nozzle 1 inserted into the molten steel can be accurately controlled. Wherein, the liquid level can be kept stable by automatically adjusting the pulling speed or the pouring flow size of the tundish.
A reference measuring plane is selected on the mould, preferably the upper surface of the mould flange 2 is selected as reference measuring plane.
The height from the upper surface of the flange to the bottom surface of the mold is measured in advance, the reference surface 51 of the measuring device is attached to the upper surface of the mold flange 2, the measuring rod 71 is extended into molten steel at this time, the section of the measuring rod 71 immersed in molten steel is melted by molten steel at a high temperature, and the distance from the melted position of the measuring rod 71 to the reference surface 51 is measured, so that the depth of molten steel can be obtained.
The handle 6 is provided with a lifting portion 61, and the handle 6 is connected to the reference portion 5 through the lifting portion 61. The lifting part 61 lifts the handle 6 away from molten steel when the user operates, so that the handle is more comfortable and safer.
Preferably, the measuring rod 71 is inserted into the molten steel for 3 to 5 seconds and then taken out for measurement.
The invention has been described in connection with the preferred embodiments, but the invention is not limited to the embodiments disclosed above, but it is intended to cover various modifications, equivalent combinations according to the essence of the invention.
Claims (10)
1. A molten steel depth measuring device of a continuous casting crystallizer, which is characterized by comprising: the measuring device comprises a reference part, a handle and a measuring part, wherein the handle is connected with the reference part, the reference part is provided with a reference surface, the measuring part is provided with a measuring rod, and the measuring rod is detachably arranged on the measuring part.
2. The device for measuring the molten steel depth of the continuous casting crystallizer according to claim 1, wherein the measuring part is provided with a jack and a first fastening piece, the measuring rod is inserted into the jack, and the first fastening piece penetrates through the side wall of the jack to lock the measuring rod.
3. The apparatus for measuring the molten steel depth of a continuous casting mold according to claim 1, wherein the measuring rod is a hollow tube.
4. The device for measuring the molten steel depth of the continuous casting mold according to claim 1, wherein the handle is provided with a lifting portion, and the handle is connected with the reference portion through the lifting portion.
5. The device for measuring the molten steel depth of the continuous casting mold according to claim 1, wherein the reference part is provided with a telescopic rod which can move in a telescopic manner, and one end of the telescopic rod is provided with the reference surface.
6. The apparatus according to claim 5, wherein the reference portion is provided with a movable hole, the telescopic rod is slidably inserted into the movable hole, a second fastening member is provided on a side wall of the movable hole, and the second fastening member passes through the side wall of the movable hole to fix the telescopic rod.
7. The apparatus for measuring the molten steel depth of a continuous casting mold according to any one of claims 1 to 6, wherein the measuring rod is provided with an L-shaped hook at its end.
8. The molten steel depth control method for the continuous casting crystallizer is characterized by comprising the following steps of:
measuring the molten steel depth of a continuous casting mold by using the measuring device according to any one of claims 1 to 6, mounting a measuring rod on a mounting part, taking a standard surface on the mold, abutting the standard surface of a reference part against the standard surface of the mold, inserting the measuring rod into molten steel, melting the measuring rod inserted into the molten steel by the molten steel, and obtaining the molten steel depth according to the melted position of the measuring rod;
or, the measuring device according to claim 7 is used for measuring the depth of the pouring basket nozzle inserted into molten steel, the measuring rod is mounted on the mounting part, a standard surface is taken on the crystallizer, the standard surface of the standard part is abutted against the standard surface of the crystallizer, the measuring rod is inserted into the molten steel, the L-shaped hook of the measuring rod hooks the lower end surface of the pouring basket nozzle, and the depth of the pouring basket nozzle inserted into the molten steel is obtained according to the melted position of the measuring rod.
9. The method for controlling the molten steel depth of a continuous casting mold according to claim 8, further comprising:
and when the molten steel depth of the continuous casting crystallizer or the molten steel insertion depth of the tundish nozzle is measured, loosening the second fastening piece, enabling the telescopic rod to slide in the movable hole until the datum surface of the datum part abuts against the standard surface of the crystallizer, and locking the second fastening piece.
10. The method for controlling the molten steel depth of a continuous casting mold according to claim 8 or 9, further comprising:
selecting the upper surface of the crystallizer flange as the standard surface, and calibrating the crystallizer molten steel depth displayed by a control system according to the obtained continuous casting crystallizer molten steel depth;
or, according to the depth of the pouring basket nozzle inserted into molten steel and the depth of the molten steel of the continuous casting crystallizer, adjusting the depth of the molten steel of the continuous casting crystallizer to ensure that the depth of the pouring basket nozzle inserted into the molten steel is within a rated range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311763365.5A CN117816949A (en) | 2023-12-20 | 2023-12-20 | Molten steel depth measuring device of continuous casting crystallizer and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311763365.5A CN117816949A (en) | 2023-12-20 | 2023-12-20 | Molten steel depth measuring device of continuous casting crystallizer and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117816949A true CN117816949A (en) | 2024-04-05 |
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ID=90523723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311763365.5A Pending CN117816949A (en) | 2023-12-20 | 2023-12-20 | Molten steel depth measuring device of continuous casting crystallizer and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117816949A (en) |
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2023
- 2023-12-20 CN CN202311763365.5A patent/CN117816949A/en active Pending
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