CN210280604U - Multi-flow straight arc-shaped wide flat blank continuous casting machine production line - Google Patents
Multi-flow straight arc-shaped wide flat blank continuous casting machine production line Download PDFInfo
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- CN210280604U CN210280604U CN201821902928.9U CN201821902928U CN210280604U CN 210280604 U CN210280604 U CN 210280604U CN 201821902928 U CN201821902928 U CN 201821902928U CN 210280604 U CN210280604 U CN 210280604U
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Abstract
The utility model provides a multi-flow straight arc-shaped wide flat blank continuous casting machine production line, which comprises a steel ladle, a steel ladle rotary table, a tundish car and a wide flat blank continuous casting machine production line connected with the tundish, wherein the continuous casting machine production line comprises a crystallizer, a hydraulic vibration device, a close-packed clamping section, a tension leveler, a flame cutter and a dummy bar arranged on a roller way which are arranged in sequence, the close-packed clamping section comprises a bending roller section arranged below the crystallizer and a plurality of fan-shaped sections arranged below the bending section, the maximum drawing speed of the continuous casting machine is improved by increasing the arc radius formed by enclosing a plurality of fan-shaped roller sections in the production process of the continuous casting machine, an upper drawing and straightening roller and a lower drawing and straightening roller of the drawing and straightening machine are respectively connected with a driving device, each fan-shaped section is respectively provided with a sliding block, a plurality of replacing guide rails are correspondingly arranged in the arc-shaped radial direction, and each sliding block is respectively connected in a sliding way in the corresponding replacing guide rail. The utility model discloses the drawing speed is big, and output is high, can multithread while producing the same section wide slab.
Description
Technical Field
The utility model relates to a metallurgical machinery continuous casting equipment technical field that draws blank, more specifically relates to a can match the wide slab caster production line of multithread straight arc of large-scale converter.
Background
The small plate blank is also called a narrow plate blank, commonly called a wide flat blank, generally refers to a plate blank with the thickness of 125-200 mm and the width of 400-900 mm, and is a special blank type between a rectangular blank and a conventional plate blank. Compared with the traditional plate blank, the thickness of the plate blank is thinner and the width of the plate blank is narrower. Compared with the rectangular blank, the width is larger, and the width-thickness ratio exceeds 2.0. For the sake of distinction, this type of blank is often referred to as a wide flat blank. The slab is mainly characterized by low output in single flow and hours, and the final product of the slab is used as medium-wide strip steel and is used in the industries of household appliances, welded pipes, building materials and the like. With the demand of national economic development, the band steel in China has wider and wider application range and larger demand, which reaches the level of only one hundred million tons, the band steel production gradually develops towards the direction of eliminating narrow bands and developing wide bands, the continuous casting blank type required by the band steel production is also changed from a rectangular blank to a small plate blank, the production steel grade relates to high-quality carbon structural steel, and the quality requirement is higher and higher.
Since twenty-first century, the scale and production technology of steel production in China have been rapidly developed, steel making is mainly carried out by converters, the converter capacity is large (120t and above), the smelting period is short (28-38 min), in order to match the production rhythm of a large converter, the number of streams allocated by a small-sized slab caster is more and more, the traditional double-stream slab cannot meet the production requirement of the process, the traditional slab production has lower pulling speed, the yield of the caster is small, and the requirement of modern industrial production cannot be met.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model aims at providing a wide slab caster production line of multithread straight arc to solve the problem that traditional slab output is little the pulling speed is low.
In order to achieve the above object, the present invention provides the following technical solutions.
A multi-flow straight arc-shaped wide slab continuous casting machine production line comprises a steel ladle, a steel ladle rotary table for carrying and bearing the steel ladle, a tundish positioned below the steel ladle, a tundish car for carrying and carrying the tundish, and a wide slab continuous casting machine production line connected with a water gap of the tundish, wherein the wide slab continuous casting machine production line comprises a crystallizer, a hydraulic vibration device, a close-packed clamping section, a withdrawal and straightening machine, a flame cutter and a dummy bar arranged on a roller way, which are sequentially arranged, the close-packed clamping section comprises a bending section arranged below the crystallizer and a plurality of fan-shaped sections arranged below the bending section, the maximum drawing speed of the continuous casting machine is improved by increasing the arc radius formed by enclosing the plurality of fan-shaped sections in the production process of the continuous casting machine, an upper withdrawal and lower withdrawal and straightening rolls of the withdrawal and straightening machine are respectively connected with a driving device, and a slide block is respectively arranged on each fan-shaped section, a plurality of replacing guide rails are correspondingly arranged in the arc radial direction, and each sliding block is respectively connected in the corresponding replacing guide rail in a sliding manner.
Further, the arc radius formed by the encircling of the plurality of fan-shaped roller sections is 6-10m, and the maximum drawing speed of a casting blank with the thickness of 165mm produced by the continuous casting machine is 1-1.55 m/min.
Furthermore, three to six water gaps are arranged below the intermediate tank, and each water gap is connected with a production line of the wide flat blank continuous casting machine.
Further, the flow spacing is 1600-2500 mm.
Furthermore, each flow of the wide and flat blank continuous casting machine production line comprises two sets of hydraulic vibration devices, and the two sets of hydraulic vibration devices are fixed on the inner arc side and the outer arc side of the continuous casting machine through box beams respectively.
Furthermore, every set of hydraulic vibration device includes a set of vibration hydro-cylinder and leaf spring, sets up the conticaster inner arc side the vibration hydro-cylinder with set up in the conticaster outer arc side the motion stroke of vibration hydro-cylinder is the same, sets up the conticaster inner arc side the leaf spring with set up in the conticaster outer arc side the leaf spring installation angle is also the same.
Further, the roll gap of the close-packed clamping section is a fixed roll gap.
Compared with the prior art, the utility model discloses beneficial effect below having at least: the utility model increases the arc radius formed by the enclosing of the plurality of fan-shaped sections to improve the maximum pulling speed of the casting machine, provides a reliable realization way for improving the yield of wide and flat blanks, and the produced plate blank products have good quality; in addition, the invention has three to six streams of production, has small stream spacing, realizes the simultaneous production of flat billets with the same section width by multiple streams, is matched with the rapid smelting period of a large converter, not only obviously increases the productivity, but also can reduce the capital construction investment of a steel mill and the consumption of subsequent production, and can meet the market demand; the utility model discloses a change the guide rail and carry out online change and maintenance to a plurality of fan-shaped sections, need not hang out crooked section and preceding fan-shaped section, the maintenance work load that has significantly reduced can show the operation rate that improves the casting machine.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described and particularly pointed out. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Moreover, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the invention will be more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention is more fully understood. In the drawings:
fig. 1 is a schematic structural view of a multi-strand straight arc-shaped wide flat blank continuous casting machine according to an embodiment of the present invention;
fig. 2 is a sectional view taken along line B of fig. 1.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a multi-strand straight arc-shaped wide slab caster. Fig. 2 shows a cross-sectional view of a five-run straight-arc wide slab caster. See figure 1 and figure 2 jointly shown, the utility model discloses a wide flat base conticaster production line of multithread straight arc, including ladle 1, the ladle revolving platform 2 of delivery and bearing ladle 1, the pans 3 that are located ladle 1 below, a tundish car 4 for supporting the delivery pans, the wide flat base conticaster production line that the immersion nozzle of pans 3 is connected, in order to make the same section wide flat base of single caster multithread while production, and smelt cycle perfect match mutually with large-scale converter fast, the bottom of pans 3 sets up three to six immersion nozzles, every immersion nozzle and a wide flat base conticaster production line connection, thereby realize multithread continuous casting, stream interval control is at 1600 ~ 2500 mm. Each wide and flat blank continuous casting machine production line comprises a crystallizer 5, a hydraulic vibration device 7, a close-packed clamping section, a withdrawal and straightening machine 10, a flame cutting machine 11 and a dummy bar 13 arranged on a roller way 12 which are arranged in sequence. Each flow of the wide and flat blank continuous casting machine production line comprises two sets of hydraulic vibration devices 7, and the two sets of hydraulic vibration devices 7 are respectively fixed on the inner arc side and the outer arc side of the continuous casting machine through box-shaped beams 8. Every set of hydraulic vibration device 7 includes one set of vibration hydro-cylinder and leaf spring, the vibration hydro-cylinder of setting at the conticaster inner arc side is the same with the motion stroke of the vibration hydro-cylinder of setting at the conticaster outer arc side, the leaf spring of setting at the conticaster inner arc side is also the same with the leaf spring installation angle of setting at the conticaster outer arc side, it simplifies to be provided with like this to do benefit to equipment composition, can realize non-sinusoidal vibration, can reduce the chatter mark degree of depth, improve casting blank surface quality, show the emergence that reduces the cohesiveness breakout accident.
The close-packed clamping section includes a bending section 90 disposed below the mold 5 and a plurality of sector sections disposed below the bending section 90. The multiple fan-shaped sections are arranged in a close-packed manner by adopting the integral rollers to reduce the bulging deformation of the casting blank, meanwhile, the rigidity of the rollers is improved, the additional deformation of the casting blank caused by the increase of the deflection of the rollers is reduced, and the convenience is provided for maintenance, replacement and arc alignment. The roll gaps between the closely-arranged clamping sections are used for guiding and clamping the casting blank, preventing the casting blank from bulging, and meanwhile, are used for conveying the dummy bar 13. In this embodiment, in order to simplify the equipment structure, the roll gap of the close-packed clamping section is a fixed roll gap, and the frame of the bending section and the frame of the fan-shaped section are neither connected with the cylinder nor connected with the driving device, so that the roll gap size of the close-packed clamping section cannot be adjusted. For the sake of easy online replacement work of the sector, the arc that encloses to close and form at a plurality of sectors radially sets up many and changes the guide rail, and every sector top corresponds and sets up every and changes the guide rail, is provided with the slider on every sector, and the slider on every sector corresponds ground sliding connection in each changes the guide rail. In the present embodiment, the plurality of segments includes a first segment 910, a second segment 911, a third segment 912, and a fourth segment 913. The second segment 911, the third segment 912 and the fourth segment 913 are provided with sliders at their middle portions, and the second segment 911, the third segment 912 and the fourth segment 913 are provided with a first replacement guide rail 14 corresponding to the second segment 911, a second replacement guide rail 15 corresponding to the third segment 913 and a third replacement guide rail (not shown) corresponding to the fourth segment 913 in an arc shape defined by the second segment 911, the third segment 912 and the fourth segment 913. The first segment of the roll in this embodiment is not provided with a slide block and a replacement guide rail, and when the first segment of the roll needs to be maintained or replaced, the first segment of the roll is directly hoisted and pulled out from the top of the crystallizer, and certainly, the first segment of the roll can also be provided with a slide block and a corresponding replacement guide rail. The slide on the second segment 911 is slidably engaged in the first replacement rail 14, the slide on the third segment 912 is slidably engaged in the second replacement rail 15, and the slide on the fourth segment 913 is slidably engaged in the third replacement rail. When the guide rail replacing device works normally, the sliding blocks on the fan-shaped sections are located at the bottom of each replacing guide rail. When one of the fan-shaped sections needs to be maintained or replaced, for example, the second fan-shaped section 911 needs to be maintained or replaced, the second fan-shaped section 911 is dragged upwards along the direction of the replacement guide rail, and the slider on the second fan-shaped section 911 slides to drive the second fan-shaped section 911 to move to the top of the first replacement guide rail 14, so that the second fan-shaped section 911 is taken out for maintenance or replacement; by analogy, when other fan-shaped roller sections need to be maintained or replaced, the bent section 90 and the first fan-shaped section 910 do not need to be hoisted in advance, so that the maintenance workload is greatly reduced, and the operation rate of the continuous casting machine can be obviously improved.
The traditional slab production has small pulling speed and low yield, so the pulling speed needs to be improved in order to improve the yield. The width-thickness ratio of the small slab is large, the non-solidified casting blank needs to be clamped completely to avoid bulging of the casting blank, so that the close-packed clamping of the casting blank needs to be finished before a straightening point, the maximum design pulling speed is limited, and the single-flow capacity is only 30-50 ten thousand tons/flow by taking a common casting blank with the thickness of 165mm as an example. The length of the closely spaced clamping segments must be increased to increase the drawing speed, and because the length of the curved segment 90 of the straight arc caster is increased to a limited extent, the present invention increases the length of the closely spaced clamping segments by increasing the radius of the arc formed by the enclosing of the plurality of segments. The withdrawal function of the continuous casting machine is performed by a withdrawal straightening machine arranged in the straightening area, so that in order to increase the withdrawal speed, the upper withdrawal straightening roll and the lower withdrawal straightening roll of the withdrawal straightening machine 10 are each connected to a drive device, which comprises an electric motor. The output shaft of the motor is connected with a speed reducer, and the speed reducer is connected with the roll shaft of the upper pulling and straightening roll/the lower pulling and straightening roll through a transmission mechanism, so that the motor works to drive the upper pulling and straightening roll/the lower pulling and straightening roll to rotate. The inventor finds out through multiple experimental researches that the length of the closely-arranged clamping section can be increased by about 1.5m and the drawing speed can be increased by about 0.15m/min every time the arc radius is increased by 1m, so that the more the number of the fan-shaped sections is, the higher the drawing speed is, and the larger the yield of the continuous casting machine is. The inventors have measured the maximum pull rates at different arc radii, taking a 165mm wide slab as an example, and have obtained the data in table 1.
| Arc radius (m) formed by enclosing sector section | 6 | 8 | 9 | 10 |
| Maximum pulling speed (m/min) | 1.0 | 1.25 | 1.4 | 1.55 |
Table 1 shows the maximum casting speed of the caster at different arc radii of the wide slab with a thickness of 165 mm.
It can be seen from table 1 that the larger the arc radius formed by enclosing the plurality of fan-shaped sections is, the larger the maximum drawing speed of the continuous casting machine is, and therefore, the number and the radius of the fan-shaped sections can be set appropriately according to actual needs, thereby meeting production requirements.
When the multi-flow straight arc-shaped wide flat blank continuous casting machine production line of the utility model is applied, the dummy bar 13 is sent into the lower port of the crystallizer 5 through the roller way 12, the withdrawal and straightening machine 10, the fourth sector 913, the third sector 912, the second sector 911, the first sector 910 and the bending 90 in turn, the liquid molten steel in the steel ladle 1 flows into the intermediate tank 3 through the protective sleeve below the liquid molten steel for buffering and purification, and then the casting blank is injected into a crystallizer 5 through a submerged nozzle, a casting blank with a liquid core is formed through primary cooling, the casting blank is continuously bent through a bending section 90, then enters a first fan-shaped section 910 and a second fan-shaped section 911, enters a tension leveler 10 after being secondarily cooled through a third fan-shaped section 912 and a fourth fan-shaped section 913 and is continuously straightened, the straightened casting blank is pulled out by a dummy bar 13, and finally the casting blank is cut into a required fixed length by a flame cutter 11 to obtain a required qualified wide flat blank.
The multi-strand straight arc-shaped wide slab caster production line according to the present invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the multi-strand straight curved wide slab caster line of the present invention described above without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.
Claims (7)
1. A multi-flow straight arc-shaped wide slab continuous casting machine production line comprises a steel ladle, a steel ladle rotary table for carrying and bearing the steel ladle, a tundish positioned below the steel ladle, a tundish car for carrying and carrying the tundish, and a wide slab continuous casting machine production line connected with a water gap of the tundish, wherein the wide slab continuous casting machine production line comprises a crystallizer, a hydraulic vibration device, a close-packed clamping section, a withdrawal and straightening machine, a flame cutter and a dummy bar arranged on a roller way, which are sequentially arranged, and is characterized in that the close-packed clamping section comprises a bending section arranged below the crystallizer and a plurality of fan-shaped sections arranged below the bending section, the maximum drawing speed of the continuous casting machine is improved by increasing the arc radius formed by enclosing the plurality of fan-shaped sections in the production process of the continuous casting machine, and an upper withdrawal and lower withdrawal and straightening rolls of the withdrawal and straightening machine are respectively connected with a driving device, the arc-shaped guide rail is characterized in that sliding blocks are arranged on the fan-shaped sections respectively, a plurality of replacement guide rails are correspondingly arranged in the radial direction of the arc-shaped section, and the sliding blocks are connected in the corresponding replacement guide rails in a sliding mode.
2. The line of claim 1, wherein the radius of the arc formed by the plurality of segments is 6-10m, and the maximum casting speed of the caster for producing a 165mm thick slab is 1-1.55 m/min.
3. The multistream straight arc wide slab caster line of claim 1, wherein three to six nozzles are provided below said tundish, each of said nozzles being connected to one wide slab caster line.
4. The multi-stream straight arc wide slab caster production line of claim 3, wherein the stream spacing is 1600 to 2500 mm.
5. The multistream straight curved wide slab caster production line of claim 1, wherein said wide slab caster production line comprises two sets of hydraulic vibration devices per run, said two sets of hydraulic vibration devices being fixed to the inner and outer curve sides of said caster by box beams, respectively.
6. The multistream straight curved wide slab caster production line according to claim 5, wherein each set of said hydraulic oscillating means comprises a set of oscillating cylinder and plate spring, the moving stroke of said oscillating cylinder disposed on the inner curved side of said caster and the moving stroke of said oscillating cylinder disposed on the outer curved side of said caster are the same, and the installation angle of said plate spring disposed on the inner curved side of said caster and said plate spring disposed on the outer curved side of said caster is also the same.
7. The multistream straight curved wide slab caster line of claim 1, wherein said closely spaced pinch off sections have a fixed roll gap.
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| CN201821902928.9U CN210280604U (en) | 2018-11-19 | 2018-11-19 | Multi-flow straight arc-shaped wide flat blank continuous casting machine production line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332622A (en) * | 2018-11-19 | 2019-02-15 | 中冶连铸技术工程有限责任公司 | The wide slab continuous casting machine production line of the straight arc of multithread |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332622A (en) * | 2018-11-19 | 2019-02-15 | 中冶连铸技术工程有限责任公司 | The wide slab continuous casting machine production line of the straight arc of multithread |
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