CN214349484U - Liquid level control device for slab continuous casting tundish molten steel - Google Patents
Liquid level control device for slab continuous casting tundish molten steel Download PDFInfo
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- CN214349484U CN214349484U CN202023159301.9U CN202023159301U CN214349484U CN 214349484 U CN214349484 U CN 214349484U CN 202023159301 U CN202023159301 U CN 202023159301U CN 214349484 U CN214349484 U CN 214349484U
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Abstract
The utility model provides a package molten steel liquid level control device in middle of slab continuous casting, includes PLC system and electromagnetism level sensor, the PLC system respectively with the slide gate switch of bale and the stopper stick elevating system control connection of middle package, electromagnetism level sensor and PLC system communication connection, this electromagnetism level sensor install in the corresponding middle package up end of slab continuous casting outer arc side, electromagnetism level sensor includes infrared probe and high temperature resistant blackbody pipe, the vertical top of being fixed in the middle package molten steel liquid level of infrared probe, the cladding of high temperature resistant blackbody pipe is in infrared probe's outside. The utility model discloses an utilize the heat radiation to electromagnetic performance conveys the energy from the molten steel liquid level to infrared probe, and the radiant energy conversion is heat energy, gathers the temperature variation, and with temperature variation's signal transmission to PLC system, carries out automatic adjustment by the PLC system to the slide gate switch of bale and the stopper stick elevating system of centre package in the production process.
Description
Technical Field
The utility model belongs to the technical field of the package control technique in the middle of the slab continuous casting and specifically relates to indicate a molten steel liquid level control device of package in the middle of the slab continuous casting.
Background
In the production process of slab continuous casting, molten steel is poured into a tundish from a sliding water gap of a ladle, flows into a crystallizer from the tundish, is solidified to form a casting blank under the action of cooling water, and is pulled out of the crystallizer by a billet puller. The tundish is arranged between the ladle and the crystallizer and plays an important role in the continuous casting production of the billet. Firstly, the tundish has the function of homogenizing the components and the temperature of the molten steel, so that the scum in the molten steel floats to the surface, and the quality of the continuous casting slab is improved. Secondly, in the conversion and hoisting process of the large ladle of molten steel, enough molten steel is ensured to continuously enter the crystallizer, and the smooth continuous casting is ensured. The maintenance of the stability of the liquid level of the molten steel in the tundish is the basis for realizing the above functions.
In the traditional molten steel level control of the tundish, an eddy current instrument sensor is mainly adopted to detect the immersion depth of the molten steel level in a crystallizer, the measured molten steel level height is sent to a PLC (programmable logic controller), and the PLC controls the upper position and the lower position of a tundish stopper to adjust the molten steel flow of the tundish. However, the eddy meter sensor is greatly influenced by a high-temperature environment and a water cooling effect, the detection range and the detection precision are unstable, and particularly, the response from the setting to the injection flow lags along with the actual liquid level.
Japanese patent JP2002018563 discloses a molten steel level control method for a tundish, which comprises the steps of embedding two electromagnetic coils at the bottom of the tundish, detecting the liquid level of the tundish by an electromagnetic method, and then adjusting the amount of molten steel flowing out of the tundish by controlling the upper position and the lower position of a stopper of the tundish so as to control the liquid level of the tundish. However, this method requires modification of the tundish when embedding the coil, and the coil is easily damaged in a high-temperature environment.
In conclusion, the control of the liquid level of the molten steel in the tundish at present is greatly influenced by a high-temperature environment and a water cooling effect, the liquid level detection precision is low, the stability is poor, or the bottom of the tundish needs to be modified, the modification process is complicated, and the like.
SUMMERY OF THE UTILITY MODEL
The utility model provides a molten steel liquid level controlling means of package in middle of slab continuous casting to it is great that current molten steel liquid level detection receives high temperature environment and water-cooling effect to solve, and the liquid level detects that the precision is low, poor stability, perhaps need reform transform the middle package bottom, reforms transform shortcoming such as the process is comparatively loaded down with trivial details.
The utility model adopts the following technical scheme:
the utility model provides a package molten steel liquid level control device in middle of slab continuous casting, includes the PLC system, the PLC system respectively with the slide gate nozzle switch of big package and the stopper stick elevating system control connection of middle package, this package molten steel liquid level control device still includes electromagnetism level sensor in middle of slab continuous casting, electromagnetism level sensor with PLC system communication connection, this electromagnetism level sensor install in the middle package up end that slab continuous casting outer arc side corresponds, electromagnetism level sensor includes infrared probe and high temperature resistant black body pipe, the vertical top of being fixed in the middle package molten steel liquid level of infrared probe, the cladding of high temperature resistant black body pipe is in infrared probe's outside.
Furthermore, a ladle cover is arranged on the upper end face of the tundish, a through hole communicated with the interior of the tundish is formed in the top face of the ladle cover, and the infrared probe extends into the interior of the tundish from the through hole.
Furthermore, the molten steel level control device for the slab continuous casting tundish further comprises an L-shaped connecting rod, the horizontal section of the L-shaped connecting rod is transversely arranged on the top surface of the ladle cover, and the vertical section of the L-shaped connecting rod is fixedly connected with the infrared probe.
From the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages: the utility model discloses a package molten steel liquid level control device in middle of slab continuous casting, the electromagnetism level sensor who adopts non-contact replaces current vortex appearance sensor to respond to and detect the effective degree of depth of molten steel liquid level in the middle of the package, infrared probe is fixed in the top of middle package molten steel liquid level, insert high temperature resistant blackbody pipe at infrared probe, utilize the heat radiation, convey energy from heat source (molten steel liquid level) to absorber (infrared probe) with electromagnetic performance, radiant energy converts heat energy into, gather the temperature variation, and with temperature variation's signal transmission to PLC system, carry out automatic adjustment to the sliding water gap switch of big package in the production process and the stopper stick elevating system of middle package by the PLC system. The utility model can eliminate the interference of floating slag and heat-insulating covering agent on the liquid level of molten steel, and ensure the constancy of the liquid level of molten steel in the tundish.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings. Numerous details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent to one skilled in the art that the present invention may be practiced without these details. Well-known components, methods and processes are not described in detail below.
A molten steel level control device for a slab continuous casting tundish, which is shown in figure 1, comprises a PLC system 10 and an electromagnetic liquid level sensor 20. The PLC system 10 is respectively in control connection with the sliding water gap switch 2 of the large ladle 1 and the stopper rod lifting mechanism 4 of the tundish 3, the electromagnetic liquid level sensor 20 is in communication connection with the PLC system 10, and the electromagnetic liquid level sensor 20 is installed on the upper end face of the tundish 3 corresponding to the outer arc side of the slab continuous casting.
Referring to fig. 1, the electromagnetic liquid level sensor 20 includes an infrared probe 21 and a high temperature resistant black body tube 22, the infrared probe 21 is vertically fixed above the liquid level of the molten steel in the tundish 3, and the high temperature resistant black body tube 22 covers the outside of the infrared probe 21.
Referring to fig. 1, a cover 31 is disposed on the upper end surface of the tundish 3, a through hole 310 communicating with the interior of the tundish is formed on the top surface of the cover 31, and the infrared probe 21 extends into the interior of the tundish from the through hole.
Referring to fig. 1, the molten steel level control device for the continuous slab casting tundish further comprises an L-shaped connecting rod 23, wherein a horizontal section of the L-shaped connecting rod 23 is transversely arranged on the top surface of the ladle cover 31, and a vertical section of the L-shaped connecting rod 23 is fixedly connected with the infrared probe 21. This L type connecting rod 23 can be held by the operating personnel before the be built by contract 31 is hoisted to mention electromagnetic level sensor 20, prevent that electromagnetic level sensor 20 from dropping when the be built by contract 31 hoist and damage.
The utility model discloses a package molten steel liquid level control device in middle of slab continuous casting utilizes the heat radiation to electromagnetic performance conveys the energy from heat source (molten steel liquid level) to absorber (infrared probe), and the radiant energy conversion is heat energy, gathers the temperature variation, and with temperature variation's signal transmission to PLC system, carries out automatic adjustment to sliding gate switch 2 of bale 1 and stopper stick elevating system 4 of middle package 3 in the production process by the PLC system.
The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.
Claims (3)
1. The utility model provides a package molten steel liquid level control device in middle of slab continuous casting, includes the PLC system, the PLC system respectively with the slide gate nozzle switch of bale and the stopper rod elevating system control connection of middle package, its characterized in that: still include electromagnetism level sensor, electromagnetism level sensor with PLC system communication connection, this electromagnetism level sensor installs in the corresponding tundish up end of slab continuous casting outer arc side, electromagnetism level sensor includes infrared probe and high temperature resistant blackbody pipe, the vertical top that is fixed in the tundish internal molten steel liquid level of infrared probe, the cladding of high temperature resistant blackbody pipe is in infrared probe's outside.
2. The molten steel level control device of a slab continuous casting tundish according to claim 1, wherein: the upper end face of the tundish is provided with a ladle cover, the top face of the ladle cover is provided with a through hole communicated with the interior of the tundish, and the infrared probe extends into the interior of the tundish from the through hole.
3. The molten steel level control apparatus of a slab continuous casting tundish according to claim 2, wherein: the infrared detector is characterized by further comprising an L-shaped connecting rod, the horizontal section of the L-shaped connecting rod is transversely placed on the top surface of the ladle cover, and the vertical section of the L-shaped connecting rod is fixedly connected with the infrared probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023159301.9U CN214349484U (en) | 2020-12-24 | 2020-12-24 | Liquid level control device for slab continuous casting tundish molten steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023159301.9U CN214349484U (en) | 2020-12-24 | 2020-12-24 | Liquid level control device for slab continuous casting tundish molten steel |
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| CN214349484U true CN214349484U (en) | 2021-10-08 |
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| CN202023159301.9U Active CN214349484U (en) | 2020-12-24 | 2020-12-24 | Liquid level control device for slab continuous casting tundish molten steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114449723A (en) * | 2022-04-08 | 2022-05-06 | 北京奥邦新材料有限公司 | Device and method for improving power factor of tundish plasma heating system |
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2020
- 2020-12-24 CN CN202023159301.9U patent/CN214349484U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114449723A (en) * | 2022-04-08 | 2022-05-06 | 北京奥邦新材料有限公司 | Device and method for improving power factor of tundish plasma heating system |
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