CN112170795A - Work roll mechanism, double-roll thin strip continuous casting equipment and continuous casting production process - Google Patents
Work roll mechanism, double-roll thin strip continuous casting equipment and continuous casting production process Download PDFInfo
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- CN112170795A CN112170795A CN202011130782.2A CN202011130782A CN112170795A CN 112170795 A CN112170795 A CN 112170795A CN 202011130782 A CN202011130782 A CN 202011130782A CN 112170795 A CN112170795 A CN 112170795A
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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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0648—Casting surfaces
- B22D11/0651—Casting wheels
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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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
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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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
- B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel
Abstract
The invention discloses a working roll mechanism, a double-roll thin strip continuous casting device and a continuous casting production process, wherein the working roll mechanism comprises: the working part comprises a roller core, a roller sleeve sleeved on the circumferential outer side of the roller core and a cooling liquid channel arranged between the outer side surface of the roller core and the inner side surface of the roller sleeve; the first connecting part is arranged at one end of the working part and comprises a first liquid inlet channel and a first liquid outlet channel which are respectively communicated with the cooling liquid channel; the second connecting part is arranged at the other end of the working part and comprises a second liquid inlet channel and a second liquid outlet channel which are respectively communicated with the cooling liquid channel; the cooling liquid entering from the first liquid inlet channel flows through the cooling liquid channel and then flows out from the second liquid outlet channel; and the cooling liquid entering from the second liquid inlet channel flows through the cooling liquid channel and then flows out from the first liquid outlet channel. The working roller mechanism provided by the invention improves the uniformity of the cold zone effect of the working part, is beneficial to improving the reliability of the thin strip processed by the working roller mechanism, and is suitable for popularization and application.
Description
Technical Field
The invention relates to the technical field of double-roller thin-strip continuous casting, in particular to a working roller mechanism and double-roller thin-strip continuous casting equipment.
Background
The twin-roll thin strip continuous casting technology is a leading-edge technology with short flow path, low cost and environmental protection in the field of metallurgy. The method integrates the traditional technological processes of continuous casting, rolling, heat treatment and the like, completes the short-flow thin strip continuous casting production line, and greatly shortens the flow of the whole production line. The whole process saves a large amount of labor cost and energy cost; the process of ingot casting surface milling is saved, the head and tail cutting after hot rolling is reduced, and the yield is improved; the occupied area is small, the equipment is simple and centralized, and the early investment is small; the material has unique sub-rapid solidification characteristics, special microstructure and excellent performance; the thickness of the obtained casting belt is close to that of the final product, and the casting belt has obvious advantages for preparing certain low-plasticity materials, difficult-to-process materials and functional materials. Therefore, the process has the advantages of less equipment investment, low energy consumption and the like, and realizes green manufacturing in the steel industry.
The basic principle of the twin-roll thin strip continuous casting technology is that liquid molten steel in a molten state enters a gap between two working rolls which run at a relatively high speed through a water distribution opening device, cooling water is introduced into the working rolls, heat of metal liquid is taken away, and the liquid metal is changed into plate strip steel with a liquid core. In the process, the action of casting and rolling force exists between the working rolls, so that the crystallization and rolling processes are realized.
The work roll mechanism is one of the key components in a twin roll strip casting plant, and the cooling capacity and the uniformity of cooling of the work roll mechanism are key factors affecting the quality of cast strip. The length of the cooling water channel of the cooling roller mechanism in the related art is approximately equal to the length of the working part of the working roller mechanism, namely, the liquid inlet end and the liquid outlet end of the cooling water channel are both arranged on the working part of the working roller mechanism, so that the cooling capacity of the two ends of the working part of the working roller mechanism is stronger, and the overall cold area effect of the working part is uneven.
Disclosure of Invention
The present invention is directed to solve at least one of the problems of the prior art or the related art, and provides a work roll mechanism, a twin roll strip casting apparatus, and a twin roll strip casting apparatus.
A first aspect of the present invention provides a work roll mechanism including:
the working part comprises a roller core, a roller sleeve sleeved on the circumferential outer side of the roller core and a cooling liquid channel arranged between the outer side surface of the roller core and the inner side surface of the roller sleeve;
the first connecting part is arranged at one end of the working part and comprises a first liquid inlet channel and a first liquid outlet channel which are respectively communicated with the cooling liquid channel;
the second connecting part is arranged at the other end of the working part and comprises a second liquid inlet channel and a second liquid outlet channel which are respectively communicated with the cooling liquid channel;
the cooling liquid entering from the first liquid inlet channel flows through the cooling liquid channel and then flows out from the second liquid outlet channel; and the cooling liquid entering from the second liquid inlet channel flows through the cooling liquid channel and then flows out from the first liquid outlet channel.
Furthermore, the first connecting portion and the second connecting portion are arranged at two ends of the working portion along the axial direction of the working portion.
Further, first feed liquor passageway is including first feed liquor hole, first runner and the first drainage groove that is linked together, first feed liquor hole with first drainage groove is followed the radial setting of first connecting portion, first runner is followed the axial setting of first connecting portion, first drainage groove with the coolant liquid passageway is linked together.
Further, the first liquid outlet channel comprises a first liquid discharge hole, a second flow channel and a first outlet hole which are communicated with each other, the first liquid discharge hole and the first outlet hole are arranged along the radial direction of the first connecting portion, the second flow channel is arranged along the axial direction of the first connecting portion and is located at the axial position of the first connecting portion, the first liquid discharge hole is communicated with the cooling liquid channel, and the radius of the second flow channel is 2-3 times that of the first flow channel.
Furthermore, the second liquid inlet channel comprises a second liquid inlet hole, a third flow channel and a second liquid discharge groove which are communicated, the second liquid inlet hole and the second liquid discharge groove are arranged along the radial direction of the second connecting portion, the third flow channel is arranged along the axial direction of the second connecting portion, and the second liquid discharge groove is communicated with the cooling liquid channel.
Further, the second liquid outlet channel comprises a second liquid outlet hole, a fourth flow channel and a second outlet hole which are communicated with each other, the second liquid outlet hole and the second outlet hole are arranged along the radial direction of the second connecting portion, the fourth flow channel is arranged along the axial direction of the second connecting portion and is located at the axial position of the second connecting portion, the second liquid outlet hole is communicated with the cooling liquid channel, and the radius of the fourth flow channel is 2-3 times that of the third flow channel.
Further, the cooling liquid channel comprises at least one first cooling liquid channel and at least one second cooling liquid channel, the first cooling liquid channel is communicated with the first liquid discharge groove and the second outlet hole, the second cooling liquid channel is communicated with the second liquid discharge groove and the first outlet hole, and the first cooling liquid channel and the second cooling liquid channel are alternately distributed along the circumferential direction of the roller core; and/or
The number of the first cooling liquid channels and the number of the second cooling liquid channels are equal.
Furthermore, the number of first liquid inlet channels on the first connecting part is the same as that of the first flow channels, the number of second liquid inlet channels on the second connecting part is the same as that of the third flow channels, and the first liquid discharge groove and the second liquid discharge groove are annular grooves which are arranged at two ends of the working part and are respectively communicated with at least one first flow channel and at least one third flow channel;
when the number of the first flow passages is at least two, the at least two first flow passages are distributed along the circumferential direction of the second flow passage; when the number of the third flow passages is at least two, the at least two third flow passages are distributed along the circumferential direction of the fourth flow passage.
Further, the method also comprises the following steps:
the guide plate is obliquely arranged on the inner side, close to the working part, of the first liquid discharge groove and is opposite to the first flow channel; and/or
The guide plate is obliquely arranged on the inner side, close to the working part, of the second liquid discharge groove and is opposite to the third flow channel.
According to a second aspect of the present invention, there is provided a twin roll strip casting apparatus including: a drive section; and the channel part is connected with the working roller mechanism.
The invention provides a working roll mechanism, which comprises a working part, a first connecting part and a second connecting part, wherein the working roll mechanism can be used for a double-roll thin strip continuous casting device, namely the double-roll thin strip continuous casting device comprises two working roll mechanisms, molten steel in a molten state is contacted with the working part of the working roll mechanism during the working process of the double-roll thin strip continuous casting device, and because the working part is provided with a cooling liquid channel, the molten steel is rapidly cooled during the contact process, and a strip steel with a liquid core is formed, so that the process that the molten steel is changed into a solid state or a semi-solid state from a liquid state is realized.
According to the working roller mechanism provided by the invention, the first connecting part and the second connecting part are distributed at two ends of the working part along the axial direction of the working part, wherein the working part is provided with the cooling liquid channel, the first connecting part is provided with the first liquid inlet channel and the first liquid outlet channel, and the second connecting part is provided with the second liquid inlet channel and the second liquid outlet channel, so that the first liquid inlet channel, the cooling liquid channel and the second liquid outlet channel form the first group of cooling channels, and the second liquid inlet channel, the cooling liquid channel and the first liquid outlet channel form the second group of cooling channels. Meanwhile, the first liquid inlet channel, the first liquid outlet channel, the second liquid inlet channel and the second liquid outlet channel are respectively arranged on the first connecting part and the second connecting part which are positioned at two ends of the working part, so that the problem that in the related technology, the liquid inlet end and the liquid outlet end of the cooling water channel are both arranged at the end part of the working part to cause that the cooling capacity at two ends of the working part is stronger and the whole cold area effect of the working part is not uniform is solved, the uniformity of the cold area effect of the working part is further improved, the improvement of the reliability of processing the thin strip by using the working roller mechanism is facilitated, and the working roller mechanism is suitable for popularization and application.
The third aspect of the present invention provides a continuous casting production process for directly casting and rolling molten steel into a hot rolled strip by including the twin roll strip casting apparatus as described above, and a large ladle, a medium ladle, a distribution ladle, a rolling mill, an ultra-fast cooling and coiling device.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
the above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 illustrates a schematic structural view of a work roll mechanism provided in accordance with one embodiment of the present invention;
FIG. 2 illustrates a cross-sectional view of a work roll mechanism provided in accordance with one embodiment of the present invention.
Wherein, the corresponding relation between the reference numbers and the part names in fig. 1 and 2 is as follows:
1-working part, 101-roll core, 102-roll sleeve, 103-cooling liquid channel, 1031-first cooling liquid channel, 1032-second cooling liquid channel;
2-a first connection part, 201-a first liquid inlet channel, 202-a first liquid outlet channel, 2011-a first liquid inlet hole, 2012-a first flow channel, 2013-a first liquid discharge groove, 2021-a first liquid discharge hole, 2022-a second flow channel, 2023-a first outlet hole;
3-a second connecting part, 301-a second liquid inlet channel, 302-a second liquid outlet channel, 3011-a second liquid inlet hole, 3012-a third flow channel, 3013-a second liquid discharge groove, 3021-a second liquid discharge hole, 3022-a fourth flow channel, and 3023-a second outlet hole.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A work roll mechanism, a twin roll thin strip casting apparatus, and a continuous casting production process according to some embodiments of the present invention will be described with reference to fig. 1 and 2.
The first aspect of the invention provides a work roll mechanism, which comprises a work part 1, a first connecting part 2 and a second connecting part 3, wherein the work part 1 comprises a roll core 101, a roll sleeve 102 sleeved on the circumferential outer side of the roll core 101, and a cooling liquid channel 103 arranged between the outer side surface of the roll core 101 and the inner side surface of the roll sleeve 102; the first connecting part 2 is arranged at one end of the working part 1 and comprises a first liquid inlet channel 201 and a first liquid outlet channel 202 which are respectively communicated with the cooling liquid channel 103; the second connecting part 3 is arranged at the other end of the working part 1 and comprises a second liquid inlet channel 301 and a second liquid outlet channel 302 which are respectively communicated with the cooling liquid channel 103; wherein, the cooling liquid entering from the first liquid inlet channel 201 flows through the cooling liquid channel 103 and then flows out from the second liquid outlet channel 302; the cooling liquid entering from the second liquid inlet channel 301 flows through the cooling liquid channel 103 and then flows out from the first liquid outlet channel 202.
The present invention provides a work roll mechanism, as shown in fig. 1 and 2, comprising a work part 1, a first connection part 2 and a second connection part 3, wherein the work roll mechanism can be used in a twin roll strip casting apparatus, i.e., the twin roll strip casting apparatus comprises two work roll mechanisms, molten steel in a molten state flows between the two work roll mechanisms and contacts with the work part 1 of the work roll mechanisms during operation of the twin roll strip casting apparatus, and since a cooling liquid passage 103 is provided between an outer side surface of a roll core 101 and an inner side surface of a roll shell 102, the molten steel is rapidly cooled during contact of the molten steel with a surface of the work part 1, and a strip steel with a liquid core is formed, thereby achieving a process of changing the molten steel from a liquid state to a solid state or a semi-solid state.
A cooling liquid channel 103 is arranged between the outer side surface of the roller core 101 and the inner side surface of the roller sleeve 102, a first connecting part 2 is provided with a first liquid inlet channel 201 and a first liquid outlet channel 202, a second connecting part 3 is provided with a second liquid inlet channel 301 and a second liquid outlet channel 302, and the cooling liquid channel 103 is respectively communicated with the first liquid inlet channel 201 and the second liquid outlet channel 302 to form a first group of cooling channels, as shown by arrows in fig. 1; the first liquid inlet channel 201 is communicated with the second liquid inlet channel 301 and the first liquid outlet channel 202 respectively to form a second group of cooling channels, and as shown by arrows in fig. 1, the flow directions of liquid in the first group of cooling channels and the second group of cooling channels are opposite, so that the improvement of the cooling uniformity of the working part 1 of the working roller mechanism is facilitated. Meanwhile, the first liquid inlet channel 201, the first liquid outlet channel 202, the second liquid inlet channel 301 and the second liquid outlet channel 302 are respectively arranged on the first connecting part 2 and the second connecting part 3 which are positioned at two ends of the working part 1, so that the problem that the cooling capacity of two ends of the working part 1 is stronger due to the fact that the liquid inlet end and the liquid outlet end of a cooling water channel are both arranged at the end part of the working part 1 in the related technology and the whole cooling effect of the working part 1 is not uniform is solved, the uniformity of the cold zone effect of the working part 1 is further improved, the quality of a thin strip machined by the working roller mechanism is favorably improved, and the working roller mechanism is suitable for popularization and application.
Further, the first connecting portion 2 of the work roll mechanism may be a driving side shaft head, and the second connecting portion 3 may be an operating side shaft head, and it can be understood that the first connecting portion 2 and the second connecting portion 3 may also be other structures meeting the requirements.
Furthermore, the contact parts of the first connecting part 2 and the second connecting part 3 and the working part 1 are in interference fit, so that the gaps between the first connecting part 2 and the working part 1 and between the second connecting part 3 and the working part 1 are reduced, the rigidity and the strength of the whole working roll mechanism are improved, the integral rigidity deformation of the working roll device when the working roll mechanism rotates is reduced to a great extent, and the product quality is improved.
As a preferred embodiment, the first connecting portion 2 and the second connecting portion 3 are disposed at both ends of the working portion 1 in the axial direction of the working portion 1. Because first inlet channel 201, first outlet channel 202, second inlet channel 301 and second inlet channel 301 set up respectively on first connecting portion 2 and the second connecting portion 3 that are located work portion 1 both ends, guarantee when drive first connecting portion 2 and second connecting portion 3 are rotatory, work portion 1 carries out axial rotation.
As a preferred embodiment, the first liquid inlet channel 201 includes a first liquid inlet hole 2011, a first liquid channel 2012 and a first liquid drain groove 2013 which are communicated with each other, the first liquid inlet hole 2011 and the first liquid drain groove 2013 are arranged along a radial direction of the first connecting portion 2, the first liquid channel 2012 is arranged along an axial direction of the first connecting portion 2, and the first liquid drain groove 2013 is communicated with the cooling liquid channel 103. In this embodiment, the structure of the first inlet passage 201 is specifically defined. The first flow channel 2012 is arranged along the axial direction of the first liquid outlet channel 202, so that the length of the first flow channel 2012 along the axial direction of the working portion 1 is effectively reduced, the cooling liquid can flow into the cooling liquid channel 103 through the first flow channel 2012 and be discharged through the second liquid outlet channel 302 quickly, the heat exchange capacity of the working portion 1 can be improved, and good cooling performance is ensured. Meanwhile, the first liquid inlet hole 2011 and the first liquid discharge groove 2013 are arranged along the radial direction of the first connecting portion 2, so that the working roller mechanism can be conveniently connected with a liquid inlet device, and the cyclic utilization of cooling water is facilitated.
Preferably, the first liquid outlet channel 202 comprises a first liquid outlet hole 2021, a second flow channel 2022 and a first outlet hole 2023 which are communicated, the first liquid outlet hole 2021 and the first outlet hole 2023 are arranged along the radial direction of the first connecting part 2, the second flow channel 2022 is arranged along the axial direction of the first connecting part 2 and is located at the axial position of the first connecting part 2, the first liquid outlet hole 2021 is communicated with the cooling liquid channel 103, and the radius of the second flow channel 2022 is 2-3 times that of the first flow channel 2012. In this embodiment, the structure of the first outlet channel 202 is specifically defined. The second flow channel 2022 is axially arranged along the first connection portion 2, so that the length of the second flow channel 2022 in the axial direction of the working portion 1 is effectively reduced, the cooling liquid is favorably flowed into the cooling liquid channel 103 through the second liquid inlet channel 301 and rapidly discharged through the second flow channel 2022, the heat exchange capability of the working portion 1 is favorably improved, and good cooling performance is ensured, meanwhile, because the liquid flowing in the first liquid outlet channel 202 has certain heat, the radius of the second flow channel 2022 is preferably 2-3 times of the radius of the first flow channel 2012, the cooling liquid is favorably flowed into the second flow channel 2022 from the cooling liquid channel 103, the flowing speed of the cooling liquid in the second flow channel 2022 is also reduced, the first connection portion 2 is slowly influenced by the temperature rise of the cooling liquid in the second flow channel 2022, and then the cooling liquid flowing through the first flow channel 2012 with the smaller radius is rapidly cooled, so as to avoid the heat of the cooling liquid in the second flow channel 2022 from staying too much on the first connection portion 2, and avoid the first connection portion 2 from generating thermal damage due to the liquid with high temperature in the second flow channel 2022. Meanwhile, the first liquid discharge hole 2021 and the first outlet hole 2023 are arranged along the radial direction of the first connecting portion 2, so that the work roller mechanism and the liquid outlet device can be conveniently connected, and the cooling water can be recycled.
Further, the second liquid inlet channel 301 includes a second liquid inlet hole 3011, a third flow channel 3012, and a second liquid discharge groove 3013, which are communicated with each other, the second liquid inlet hole 3011 and the second liquid discharge groove 3013 are arranged along the radial direction of the second connection portion 3, the third flow channel 3012 is arranged along the axial direction of the second connection portion 3, and the second liquid discharge groove 3013 is communicated with the coolant channel 103. In this embodiment, the structure of the second liquid inlet passage 301 is specifically defined. Meanwhile, the third flow channel 3012 is arranged along the axial direction of the second liquid outlet channel 302, so that the temperature of the second connection portion 3 is raised, and the second connection portion 3 can be cooled by arranging the third flow channel 3012 along the axial direction of the second liquid outlet channel 302, thereby avoiding thermal damage of the second connection portion 3 due to the high-temperature liquid in the second liquid outlet channel 302. Meanwhile, the second liquid inlet hole 3011 and the second liquid discharge groove 3013 are arranged along the radial direction of the second connecting portion 3, so that the working roller mechanism can be conveniently connected with a liquid inlet device, and the cyclic utilization of cooling water is facilitated.
The second liquid outlet channel 302 includes a second liquid outlet hole 3021, a fourth flow channel 3022, and a second outlet hole 3023, which are communicated with each other, the second liquid outlet hole 3021 and the second outlet hole 3023 are arranged along a radial direction of the second connecting portion 3, the fourth flow channel 3022 is arranged along an axial direction of the second connecting portion 3 and located at an axial position of the second connecting portion 3, the second liquid outlet hole 3021 is communicated with the coolant channel 103, and a radius of the fourth flow channel 3022 is 2-3 times a radius of the third flow channel 3012. In this embodiment, the structure of the second outlet channel 302 is specifically defined. The fourth flow channel 3022 is axially arranged along the second connection portion 3, so that the length of the fourth flow channel 3022 in the axial direction of the working portion 1 is effectively reduced, the cooling liquid is facilitated to flow into the cooling liquid channel 103 through the first liquid inlet channel 201 and to be quickly discharged through the first flow channel 2012, the heat exchange capacity of the working portion 1 is facilitated to be improved, and good cooling performance is ensured, meanwhile, because the liquid flowing in the second liquid outlet channel 302 has a certain amount of heat, the radius of the fourth flow channel 3022 is preferably 2-3 times the radius of the third flow channel 3012, which is not only beneficial to the cooling liquid flowing into the fourth flow channel 3022 from the cooling liquid channel 103, but also can slow down the flowing speed of the cooling liquid in the fourth flow channel 3022, so that the second connection portion 3 is slowly influenced by the temperature rise of the cooling liquid in the fourth flow channel 3022, and then the cooling liquid flowing through the third flow channel 3012 with a smaller radius is quickly cooled, so as to prevent the heat of the coolant in the fourth flow passage 3022 from staying on the second connection portion 3 too much, and prevent the second connection portion 3 from being thermally damaged due to the high-temperature liquid in the fourth flow passage 3022. Meanwhile, the second liquid discharge hole 3021 and the second outlet hole 3023 are arranged along the radial direction of the second connecting portion 3, so that the work roll mechanism can be conveniently connected with a liquid outlet device, and the cooling water can be recycled.
As another preferred embodiment, the coolant passage 103 includes at least one first coolant passage 1031 and at least one second coolant passage 1032, the first coolant passage 1031 communicating with the first drain groove 2013 and the second outlet hole 3023, the second coolant passage 1032 communicating with the second drain groove 3013 and the first outlet hole 2023, wherein the first coolant passage 1031 and the second coolant passage 1032 are alternately distributed along the circumferential direction of the roll core 101; and/or the number of first and second coolant passages 1031, 1032 is equal. Wherein the first coolant passages 1031 and the second coolant passages 1032 are alternately distributed along the circumferential direction of the working part 1, and since the flow directions of the cooling water of the first coolant passages 1031 and the second coolant passages 1032 are opposite, the plurality of first coolant passages 1031 and second coolant passages 1032 which are alternately distributed are beneficial to ensuring the uniformity of cooling of the working part 1 and enabling the working part 1 to have higher cooling capacity. When the number of the first coolant passages 1031 and the second coolant passages 1032 is equal, it is advantageous to further improve the uniformity of cooling of the working portion 1.
Furthermore, according to the length and the heat dissipation effect of the working part 1, two or more cooling loops are arranged in the whole working roller mechanism, and the heat exchange capacity of the working roller is further improved. Specifically, on the first connecting portion 2, one or more first flow channels 2012 and second flow channels 2022 are opened in the axial direction, and one or more first liquid inlet holes 2011, first liquid outlet grooves 2013, first liquid outlet holes 2021 and first outlet holes 2023 are opened in the radial direction; one or more third flow channels 3012 and fourth flow channels 3022 are axially formed in the second connection portion 3, and one or more second liquid inlet holes 3011, second liquid discharge grooves 3013, second liquid discharge holes 3021, and second outlets are radially formed in the second connection portion. Through the circulation, the whole working roller mechanism can realize a plurality of independent cooling water channels, realize that adjacent liquid inlet channels under the working surface of the working part 1 realize the uniform heat exchange of the working surface through the opposite incoming water. Furthermore, the working roll mechanism is effectively ensured to be in a better cooling state in the double-roll thin strip continuous casting working process, thin strip continuous casting plate strips with uniform cooling capacity are cast and rolled in the uniform casting and rolling process, the defects of the strips caused by casting and rolling are reduced, and the method is suitable for popularization and application.
Preferably, the number of the first liquid inlet channels 201 on the first connecting portion 2 is the same as that of the first flow channels 2012, the number of the second liquid inlet channels 301 on the second connecting portion 3 is the same as that of the third flow channels 3012, and the first liquid discharge groove 2013 and the second liquid discharge groove 3013 are annular grooves which are respectively arranged at two ends of the working portion 1 and are communicated with at least one first flow channel 2012 and at least one third flow channel 3012; wherein, when the number of the first flow channels 2012 is at least two, the at least two first flow channels 2012 are distributed along the circumference of the second flow channel 2022; when the number of the third flow channels 3012 is at least two, the at least two third flow channels 3012 are distributed along the circumferential direction of the fourth flow channel 3022. In this embodiment, on one hand, the first liquid discharge groove 2013 is an annular groove, that is, the annular groove communicates with any first flow channel 2012 and any first cooling liquid passage 1031, so that after the liquid in all the first flow channels 2012 is gathered by the first liquid discharge groove 2013, the liquid uniformly flows to the plurality of first cooling liquid passages 1031, which is beneficial to ensuring the uniformity of water flow of the plurality of first cooling liquid passages 1031, and further improving the uniformity of cooling.
On the other hand, the second liquid discharge slots 3013 are annular slots, that is, the annular slots communicate with any one of the third flow channels 3012 and any one of the second cooling liquid channels 1032, so that water in all the third flow channels 3012 flows uniformly to the plurality of second cooling liquid channels 1032 after being gathered by the second liquid discharge slots 3013, which is beneficial to ensuring uniformity of water flow of the plurality of second cooling liquid channels 1032, and further improving uniformity of cooling.
On the other hand, the first liquid discharge groove 2013 and the second liquid discharge groove 3013 may be provided as annular grooves at the same time, which is advantageous for further improving the uniformity of cooling of the working portion 1.
Further, the device also comprises a guide plate, wherein the guide plate is obliquely arranged on the inner side, close to the working part 1, of the first liquid discharge groove 2013 and is opposite to the first flow channel 2012; and/or a guide plate is provided obliquely to the second drain slot 3013 on the inner side of the working unit 1, and is provided to face the third flow channel 3012.
In this embodiment, the guide plate is obliquely disposed on the inner side of the first liquid discharge groove 2013 close to the working part 1 and is disposed opposite to the first flow channel 2012, so that the cooling water can be reflected into the first cooling liquid channel 1031, that is, the liquid inlet amount of the cooling water entering the first cooling liquid channel 1031 is increased, the pressure loss of the cooling water after the cooling water turns right angle is reduced, the energy is saved, and the manufacturing cost is reduced.
On the other hand, the guide plate is obliquely arranged on the inner side of the second liquid discharge slot 3013 close to the working part 1 and is arranged opposite to the third flow channel 3012, which is beneficial to ensuring that the cooling water can be reflected into the second cooling liquid channel 1032, namely, increasing the liquid inlet amount of the cooling water entering the second cooling liquid channel 1032, reducing the pressure loss after the cooling water is turned to a right angle, being beneficial to saving energy and reducing the manufacturing cost.
On the other hand, guide plates can be arranged in the first liquid discharge groove 2013 and the second liquid discharge groove 3013 at the same time, so that energy loss can be further reduced, and good cooling capacity can be guaranteed.
Wherein, the coolant liquid flows into the first liquid drain groove 2013 from the first liquid inlet 2011 of the first connecting portion 2 through the first flow channel 2012, a guide plate (retaining wall) with slope is arranged in the first liquid drain groove 2013, it is ensured that the liquid inlet of the first connecting portion 2 can enter the first coolant liquid channel 1031 through the guide plate, and thus, the pressure loss in the process of cooling water transfer to the right angle and water feeding is reduced. A plurality of first coolant passages 1031 may be arranged in the working portion 1 according to the size of the working portion 1 and the requirement of cooling capacity, to improve the cooling capacity.
According to a second aspect of the present invention, there is provided a twin roll strip casting apparatus including: a drive section; and the working roller mechanism of any embodiment, wherein the channel part is connected with the working roller mechanism.
The invention provides a twin-roll thin strip continuous casting device which comprises a driving part and a working roll mechanism of any embodiment, wherein the driving part is connected with the working roll mechanism and drives the working roll mechanism to work.
The continuous casting production process provided by the invention comprises the twin-roll thin strip continuous casting equipment, and a large ladle, a medium ladle, a distribution bag, a rolling mill, an ultra-fast cooling and coiling device, wherein the molten steel is directly cast and rolled into a hot strip.
In the specific embodiment provided by the invention, the twin-roll thin strip continuous casting technology is a leading-edge technology which has short flow path, low cost and environmental protection in the field of metallurgy. The method integrates the traditional technological processes of continuous casting, rolling, heat treatment and the like, completes the short-flow thin strip continuous casting production line, and greatly shortens the flow of the whole production line. The whole process saves a large amount of labor cost and energy cost; the process of ingot casting surface milling is saved, the head and tail cutting after hot rolling is reduced, and the yield is improved; the occupied area is small, the equipment is simple and centralized, and the early investment is small; the material has unique sub-rapid solidification characteristics, special microstructure and excellent performance; the thickness of the obtained casting belt is close to that of the final product, and the casting belt has obvious advantages for preparing certain low-plasticity materials, difficult-to-process materials and functional materials. Therefore, the process has the advantages of less equipment investment, low energy consumption and the like, and realizes green manufacturing in the steel industry.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. A work roll mechanism, comprising:
the working part (1) comprises a roller core (101), a roller sleeve (102) sleeved on the circumferential outer side of the roller core (101), and a cooling liquid channel (103) arranged between the outer side surface of the roller core (101) and the inner side surface of the roller sleeve (102);
the first connecting part (2) is arranged at one end of the working part (1) and comprises a first liquid inlet channel (201) and a first liquid outlet channel (202) which are respectively communicated with the cooling liquid channel (103);
the second connecting part (3) is arranged at the other end of the working part (1) and comprises a second liquid inlet channel (301) and a second liquid outlet channel (302) which are respectively communicated with the cooling liquid channel (103);
wherein, the cooling liquid entering from the first liquid inlet channel (201) flows out from the second liquid outlet channel (302) after flowing through the cooling liquid channel (103); the cooling liquid entering from the second liquid inlet channel (301) flows out from the first liquid outlet channel (202) after flowing through the cooling liquid channel (103).
2. A work roll mechanism according to claim 1, characterized in that the first connection (2) and the second connection (3) are both arranged at both ends of the work part (1) in the axial direction of the work part (1).
3. A work roll mechanism according to claim 1 or 2, characterized in that the first liquid inlet channel (201) comprises a first liquid inlet hole (2011), a first flow channel (2012) and a first liquid discharge groove (2013) which are communicated with each other, the first liquid inlet hole (2011) and the first liquid discharge groove (2013) are arranged along the radial direction of the first connecting part (2), the first flow channel (2012) is arranged along the axial direction of the first connecting part (2), and the first liquid discharge groove (2013) is communicated with the cooling liquid channel (103).
4. A work roll mechanism according to claim 3, characterized in that the first liquid outlet channel (202) comprises a first liquid outlet hole (2021), a second flow channel (2022) and a first outlet hole (2023) which are communicated with each other, the first liquid outlet hole (2021) and the first outlet hole (2023) are arranged along the radial direction of the first connecting portion (2), the second flow channel (2022) is arranged along the axial direction of the first connecting portion (2) and located at the axial position of the first connecting portion (2), the first liquid outlet hole (2021) is communicated with the cooling liquid channel (103), wherein the radius of the second flow channel (2022) is 2-3 times the radius of the first flow channel (2012).
5. A work roll mechanism according to claim 4, characterized in that the second liquid inlet channel (301) comprises a second liquid inlet hole (3011), a third flow channel (3012) and a second liquid discharge groove (3013) which are communicated with each other, the second liquid inlet hole (3011) and the second liquid discharge groove (3013) are arranged along the radial direction of the second connecting portion (3), the third flow channel (3012) is arranged along the axial direction of the second connecting portion (3), and the second liquid discharge groove (3013) is communicated with the cooling liquid channel (103).
6. A work roll mechanism according to claim 5, characterized in that the second liquid outlet channel (302) comprises a second liquid outlet hole (3021), a fourth liquid flow channel (3022) and a second outlet hole (3023) which are in communication, the second liquid outlet hole (3021) and the second outlet hole (3023) being arranged in the radial direction of the second joint part (3), the fourth liquid flow channel (3022) being arranged in the axial direction of the second joint part (3) and being located in the axial direction of the second joint part (3), the second liquid outlet hole (3021) being in communication with the coolant channel (103), wherein the radius of the fourth liquid flow channel (3022) is 2-3 times the radius of the third liquid flow channel (3012).
7. A work roll mechanism according to claim 6, characterized in that the coolant channel (103) comprises at least a first coolant channel (1031) and at least a second coolant channel (1032), the first coolant channel (1031) communicating with the first drain groove (2013) and the second outlet hole (3023), the second coolant channel (1032) communicating with the second drain groove (3013) and the first outlet hole (2023), wherein the first coolant channel (1031) and the second coolant channel (1032) are alternately distributed in the circumferential direction of the roll core (101); and/or
The first coolant passage (1031) and the second coolant passage (1032) are equal in number.
8. A work roll mechanism according to claim 7, characterized in that the number of first inlet channels (201) on the first connecting part (2) is the same as the number of the first flow channels (2012), the number of second inlet channels (301) on the second connecting part (3) is the same as the number of the third flow channels (3012), and the first drain groove (2013) and the second drain groove (3013) are annular grooves which are respectively arranged at two ends of the work part (1) and are communicated with at least one first flow channel (2012) and at least one third flow channel (3012);
wherein, when the number of the first flow passages (2012) is at least two, at least two of the first flow passages (2012) are distributed along the circumferential direction of the second flow passage (2022); when the number of the third flow passages (3012) is at least two, the at least two third flow passages (3012) are distributed along the circumferential direction of the fourth flow passage (3022).
9. The work roll mechanism of claim 8, further comprising:
the guide plate is obliquely arranged on the inner side, close to the working part (1), of the first liquid discharge groove (2013) and is opposite to the first flow channel (2012); and/or
The guide plate is obliquely arranged on the inner side, close to the working part (1), of the second liquid discharge groove (3013) and is opposite to the third flow channel (3012).
10. A twin roll strip casting apparatus, comprising:
a drive section; and
the work roll mechanism of any of claims 1 to 9, the drive being connected to the work roll mechanism;
11. a continuous casting production process characterized in that molten steel is directly cast and rolled into a hot rolled strip by a twin roll strip casting plant comprising the twin roll strip casting apparatus according to claim 10, and a ladle, a tundish, a distributor ladle, a rolling mill, an ultra-rapid cooling and a coiler.
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| CN202011130782.2A CN112170795A (en) | 2020-10-21 | 2020-10-21 | Work roll mechanism, double-roll thin strip continuous casting equipment and continuous casting production process |
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| CN202011130782.2A CN112170795A (en) | 2020-10-21 | 2020-10-21 | Work roll mechanism, double-roll thin strip continuous casting equipment and continuous casting production process |
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| CN113798454A (en) * | 2021-10-27 | 2021-12-17 | 领胜城科技（江苏）有限公司 | Cooling roller for butt positioning type nanocrystalline strip making |
| CN114559000A (en) * | 2022-03-03 | 2022-05-31 | 中钢设备有限公司 | Thin strip steel continuous casting equipment and crystallization roller thereof |
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