Multi-roller independent pressing system for plate blank

Abstract

The invention provides a slab multi-roller independent screw-down system, and relates to the technical field of continuous casting, the slab multi-roller independent screw-down system comprises a low-pressure screw-down device and a high-pressure screw-down device which are arranged in parallel, a slab is used for sequentially passing through the low-pressure screw-down device and the high-pressure screw-down device, the low-pressure screw-down device comprises five groups of low-pressure press rollers, and the high-pressure press rollers comprise five groups of high-pressure press rollers. The high-pressure screw-down device comprises two sets of high-pressure press rollers, the five sets of low-pressure press rollers and the two sets of high-pressure press rollers are all used for pressing the plate blank, the sum of the rolling reduction of the five sets of low-pressure press rollers is equal to the sum of the rolling reduction of the two sets of high-pressure press rollers, and the solidification tail end of the plate blank is located between the two sets of high-pressure press rollers. The low-pressure reduction device and the high-pressure reduction device are combined to press the plate blank, and the extra-thick plate blank can be continuously and efficiently compressed according to an equal-strength reduction mode, so that the center looseness of the plate blank is inhibited, the internal quality of the plate blank is improved, and the continuous casting quality of the plate blank is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of continuous casting, and in particular to a slab multi-roller independent pressing system. Background Art

[0002] At present, the steel industry generally adopts the process production line of slab continuous casting machine and widened thick plate rolling mill to produce thick and extra-thick steel plates. In order to ensure the quality of the finished product, the rolling of steel plates must ensure a certain compression ratio, so the production of thicker steel plates requires thicker slabs. For extra-thick slabs (slab thickness ≥ 400mm), the distance from the disappearance of the liquid phase in the center of the slab to the final full solidification along the casting flow direction during casting is very large, up to more than 6m, resulting in looseness in the core of the slab and aggravated segregation defects, reducing the final qualified rate of flaw detection of rolled products. The thicker the slab, the more serious the central looseness and segregation, and the more difficult it is to ensure the quality of slab continuous casting. Summary of the invention

[0003] The problem to be solved by the present invention is how to improve the quality of the core part of the slab continuous casting.

[0004] To this end, the present invention provides a multi-roller independent pressing system for slabs, comprising a low-pressure pressing device and a high-pressure pressing device arranged in parallel, the slab being used to pass through the low-pressure pressing device and the high-pressure pressing device in sequence, the low-pressure pressing device comprising five groups of low-pressure rollers, the high-pressure pressing device comprising two groups of high-pressure rollers, the five groups of low-pressure rollers and the two groups of high-pressure rollers are both used to press the slabs, the sum of the pressing amounts of the five groups of low-pressure rollers is equal to the sum of the pressing amounts of the two groups of high-pressure rollers, and the solidification end of the slab is located between the two groups of high-pressure rollers.

[0005] Optionally, each group of the low-pressure rollers includes a low-pressure lower roller and a low-pressure upper roller arranged in the vertical direction, and each group of the high-pressure rollers includes a high-pressure lower roller and a high-pressure upper roller arranged in the vertical direction, the low-pressure lower roller and the high-pressure lower roller are used to receive the slab, and the low-pressure upper roller and the high-pressure upper roller are used to reciprocate in the vertical direction.

[0006] Optionally, the low-pressure down-pressing device also includes five groups of low-pressure cylinders, which are used to drive the five low-pressure upper pressure rollers to reciprocate in the vertical direction respectively, and the high-pressure down-pressing device also includes two groups of high-pressure cylinders, which are used to drive the two high-pressure upper pressure rollers to reciprocate in the vertical direction respectively.

[0007] Optionally, the low-pressure down-pressing device also includes a low-pressure driving mechanism, which is used to drive the low-pressure lower pressure roller and the low-pressure upper pressure roller to rotate around their axes, and the high-pressure down-pressing device also includes a high-pressure driving mechanism, which is used to drive the high-pressure lower pressure roller and the high-pressure upper pressure roller to rotate around their axes.

[0008] Optionally, the low-pressure drive mechanism includes multiple groups of first connecting flanges, first universal couplings, first motors and first reducers, and the low-pressure upper pressure roller and the low-pressure lower pressure roller are respectively and sequentially connected to a corresponding group of the first universal couplings, the first connecting flanges, the first reducer and the first motor, and the high-pressure drive mechanism includes multiple groups of second connecting flanges, second universal couplings, second motors and second reducers, and the high-pressure upper pressure roller and the high-pressure lower pressure roller are respectively and sequentially connected to a corresponding group of the second universal couplings, the second connecting flanges, the second reducer and the second motor.

[0009] Optionally, in the low-pressure drive mechanism, the multiple first reducers corresponding to the five low-pressure upper pressure rollers and the multiple first reducers corresponding to the five low-pressure lower pressure rollers are respectively arranged alternately along the arrangement direction of the five groups of low-pressure rollers, and in the high-pressure drive mechanism, the two second reducers corresponding to the two high-pressure lower pressure rollers and the two second reducers corresponding to the two high-pressure upper pressure rollers are respectively arranged alternately along the arrangement direction of the two groups of high-pressure rollers.

[0010] Optionally, the low-pressure pressing device also includes a first frame, and the high-pressure pressing device also includes a second frame, the first frame and the second frame are both hollow structures, the five low-pressure upper pressure rollers and the five low-pressure lower pressure rollers are respectively connected side by side on the upper side and the lower side of the first frame, and the two high-pressure upper pressure rollers and the two high-pressure lower pressure rollers are respectively connected side by side on the upper side and the lower side of the second frame.

[0011] Optionally, a second low-pressure pressing device is provided at one end of the low-pressure pressing device away from the high-pressure pressing device, or at one end of the high-pressure pressing device away from the low-pressure pressing device.

[0012] Optionally, the low-pressure pressing device and the high-pressure pressing device have the same length in the moving direction of the slab.

[0013] Optionally, each group of the low-pressure cylinders and each group of the high-pressure cylinders are two, and the two low-pressure cylinders are respectively driven and connected to the two ends of the low-pressure upper pressure roller along the length direction, and the two high-pressure cylinders are respectively driven and connected to the two ends of the high-pressure upper pressure roller along the length direction.

[0014] Compared with the prior art, the slab multi-roller independent pressing system of the present invention has the following beneficial effects:

[0015] The present invention provides a low-pressure pressing device and a high-pressure pressing device. When the slab is rolled, it faces the positive direction of the X-axis and passes through the low-pressure pressing device and the high-pressure pressing device in sequence. The low-pressure pressing device is provided with five groups of low-pressure rollers, which are arranged in sequence along the X-axis direction. The high-pressure pressing device is provided with two groups of high-pressure rollers, which are also arranged in sequence along the X-axis direction. The five groups of low-pressure rollers and the two groups of high-pressure rollers press the slab in sequence. During the pressing process of the slab, the slab will become thinner as it is pressed, and the liquid phase in the slab will become less as it is pressed. The sum of the pressing amounts of the five groups of low-pressure rollers, that is, the thinned size of the slab after being pressed by the five groups of low-pressure rollers, is set to be equal to the sum of the pressing amounts of the two groups of high-pressure rollers. That is, the size of the slab that becomes thinner after being pressed by two groups of high-pressure rollers is equal, so that the slab is subjected to the same pressing strength when passing through the low-pressure pressing device and the high-pressure pressing device, and the slab is evenly pressed. The solidification end of the slab liquid phase is set between the two groups of high-pressure pressing rollers, so that after the slab passes through the high-pressure pressing device, the central liquid phase completely disappears, which strengthens the shrinkage of the core structure of the slab and ensures the continuous casting quality of the slab. The present invention adopts a combination of a low-pressure pressing device and a high-pressure pressing device to press the slab, and can continuously and efficiently compress the extra-thick slab in an equal-intensity pressing manner to suppress the looseness in the center of the slab, improve the internal quality of the slab, improve the quality of the core of the slab continuous casting, and improve the quality of the slab continuous casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the structural schematic diagrams of the slab multi-roller independent pressing system according to an embodiment of the present invention;

[0017] Figure 2 This is one of the structural schematic diagrams of the high-pressure pressing device according to an embodiment of the present invention;

[0018] Figure 3 This is a second structural schematic diagram of the high pressure pressing device according to an embodiment of the present invention;

[0019] Figure 4 The third structural schematic diagram of the high pressure pressing device according to the embodiment of the present invention;

[0020] Figure 5 This is a second structural schematic diagram of the slab multi-roller independent pressing system according to an embodiment of the present invention;

[0021] Figure 6 This is the third structural schematic diagram of the slab multi-roller independent pressing system described in an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1-low-pressure pressing device; 11-low-pressure roller; 111-low-pressure upper roller; 112-low-pressure lower roller; 12-low-pressure cylinder; 2-high-pressure pressing device; 21-high-pressure roller; 211-high-pressure upper roller; 212-high-pressure lower roller; 22-high-pressure cylinder; 231-second motor; 232-second reducer; 24-second frame; 31-slab; 32-solidification end. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] It should be noted that in the description of the present invention, the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “top”, “bottom”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as limiting the scope of protection of the present invention.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0027] Moreover, although the present invention is described with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features of the various dependent claims and herein may be combined in a manner not described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other embodiments.

[0028] To solve the above problems, Figure 1 , Figure 2As shown, the present invention provides a multi-roller independent pressing system for a slab, comprising a low-pressure pressing device 1 and a high-pressure pressing device 2 arranged in parallel, the slab 31 is used to pass through the low-pressure pressing device 1 and the high-pressure pressing device 2 in sequence, the low-pressure pressing device 1 comprises five groups of low-pressure rollers 11, the high-pressure pressing device 2 comprises two groups of high-pressure rollers 21, the five groups of low-pressure rollers 11 and the two groups of high-pressure rollers 21 are all used to press the slab 31, the sum of the pressing amounts of the five groups of low-pressure rollers 11 is equal to the sum of the pressing amounts of the two groups of high-pressure rollers 21, and the solidification end 32 of the slab 31 is located between the two groups of high-pressure rollers 21.

[0029] In this embodiment, a low-pressure pressing device 1 and a high-pressure pressing device 2 are set. When rolling, the slab 31 faces the positive direction of the X-axis and passes through the low-pressure pressing device 1 and the high-pressure pressing device 2 in sequence. The low-pressure pressing device 1 is provided with five groups of low-pressure rollers 11, and the five groups of low-pressure rollers 11 are arranged in sequence along the X-axis direction. The high-pressure pressing device 2 is provided with two groups of high-pressure rollers 21, and the two groups of high-pressure rollers 21 are also arranged in sequence along the X-axis direction. The five groups of low-pressure rollers 11 and the two groups of high-pressure rollers 21 press the slab 31 in sequence. During the pressing process of the slab 31, the slab 31 will become thinner as it is pressed, and the liquid phase in the slab 31 will become less as it is pressed. The sum of the pressing amounts of the five groups of low-pressure rollers 11, that is, the size of the slab 31 that becomes thinner after being pressed by the five groups of low-pressure rollers 11, is set to be the sum of the pressing amounts of the two groups of high-pressure rollers 21 The slab 31 is equal to the size of the slab 31 after being thinned by the two groups of high-pressure rollers 21, that is, it is equal to the size of the slab 31 after being pressed by the two groups of high-pressure rollers 21, so that the slab 31 is subjected to the same pressing strength when passing through the low-pressure pressing device 1 and the high-pressure pressing device 2, and the slab 31 is evenly pressed. The solidified end 32 of the liquid phase of the slab 31 is set between the two groups of high-pressure rollers 21, so that after the slab 31 passes through the high-pressure pressing device 2, the central liquid phase completely disappears, which strengthens the shrinkage of the core structure of the slab 31 and ensures the continuous casting quality of the slab 31. The present invention adopts a combination of a low-pressure pressing device 1 and a high-pressure pressing device 2 to press the slab 31, and can continuously and efficiently compress the extra-thick slab 31 in an equal-intensity pressing manner to suppress the looseness in the center of the slab 31, improve the internal quality of the slab 31, improve the quality of the continuous casting core of the slab 31, and improve the continuous casting quality of the slab 31.

[0030] Specifically, as the thickness of the slab 31 becomes thinner, the high-pressure roller 21 needs to use a greater pressing force than the low-pressure roller 11 to continue to press the slab 31. The low-pressure pressing device 1 and the high-pressure pressing device 2 will produce errors during the pressing process. The difference in the pressing amount of the slab 31 passing through the low-pressure pressing device 1 and the high-pressure pressing device 2 is less than one millimeter, which also meets the pressing requirements. For example, the pressing amount of the slab 31 passing through five sets of low-pressure rollers 11 can be 2, 3, 3, 4, and 0 mm respectively, with a total pressing amount of 12 mm. The two sets of high-pressure rollers 21 The reduction amounts are 6.6 and 5.5 mm respectively, and the total reduction amount is 12.1 mm. The reduction forces required by the five groups of low-pressure rollers 11 are 3000, 4400, 4680, 5540, and 2200 kN respectively, and the reduction forces required by the two groups of high-pressure rollers 21 are 9750 and 9850 kN respectively. A low-pressure reduction device 1 with a smaller reduction force is set first, and then a high-pressure reduction device 2 with a larger reduction force is set, so that the reduction sequence is more reasonable and the reduction force is reasonably distributed. The low-pressure reduction device 1 requires smaller driving force to avoid waste of resources.

[0031] Alternatively, if Figure 2 and Figure 3 As shown, each group of the low-pressure rollers 11 includes a low-pressure lower roller 112 and a low-pressure upper roller 111 arranged in the vertical direction, and each group of the high-pressure rollers 21 includes a high-pressure lower roller 212 and a high-pressure upper roller 211 arranged in the vertical direction, the low-pressure lower roller 112 and the high-pressure lower roller 212 are used to receive the slab 31, and the low-pressure upper roller 111 and the high-pressure upper roller 211 are used to reciprocate in the vertical direction.

[0032] In this embodiment, by setting each group of high-pressure rollers 21 as a high-pressure lower roller 212 and a high-pressure upper roller 211 arranged in the Z-axis direction, the high-pressure lower roller 212 is located directly below the high-pressure upper roller 211, and the high-pressure lower roller 212 and the high-pressure upper roller 211 both extend along the Y-axis direction. During pressing, the slab 31 enters the high-pressure pressing device 2 along the X-axis direction from the middle of the high-pressure upper roller 211 and the high-pressure lower roller 212. The slab 31 moves along the X-axis direction on the high-pressure lower roller 212, and the high-pressure upper roller 211 reciprocates in the Z-axis direction. When the high-pressure upper roller 211 moves in the negative direction of the Z-axis and presses against the slab 31, the slab 31 is pressed. The structure of each group of low-pressure rollers 11 is the same as that of each group The structure of the high-pressure roller 21 is the same and is not specifically introduced in the drawings of the specification. Each group of low-pressure rollers 11 is configured as a low-pressure lower roller 112 and a low-pressure upper roller 111 arranged in the Z-axis direction. The low-pressure lower roller 112 is located directly below the low-pressure upper roller 111. The low-pressure lower roller 112 and the low-pressure upper roller 111 both extend along the Y-axis direction. During pressing, the slab 31 enters the low-pressure pressing device 1 along the X-axis direction from the middle of the low-pressure upper roller 111 and the low-pressure lower roller 112. The slab 31 moves along the X-axis direction on the low-pressure lower roller 112, and the low-pressure upper roller 111 reciprocates in the Z-axis direction. When the low-pressure upper roller 111 moves in the negative direction of the Z-axis and presses against the slab 31, the slab 31 is pressed.

[0033] Alternatively, if Figure 2 and Figure 3 As shown, the low-pressure down-pressing device 1 also includes five groups of low-pressure cylinders 12, and the five groups of low-pressure cylinders 12 are used to drive the five low-pressure upper rollers 111 to reciprocate in the vertical direction respectively. The high-pressure down-pressing device 2 also includes two groups of high-pressure cylinders 22, and the two groups of high-pressure cylinders 22 are used to drive the two high-pressure upper rollers 211 to reciprocate in the vertical direction respectively.

[0034] In this embodiment, two groups of high-pressure cylinders 22 are arranged on the high-pressure pressing device 2, and the two groups of high-pressure cylinders 22 are respectively connected to the two high-pressure upper pressing rollers 211, and respectively drive the two high-pressure upper pressing rollers 211 to reciprocate in the vertical direction. Each high-pressure upper pressing roller 211 is driven separately, so that the pressure value of the high-pressure upper pressing roller 211 can be adjusted by the high-pressure cylinder 22, so that the pressure value of each high-pressure upper pressing roller 211 can be different, and the pressing amount of each high-pressure upper pressing roller 211 on the slab 31 can also be different; the structure of the low-pressure pressing device 1 is similar to that of the high-pressure pressing device 2, and is not specifically introduced in the drawings of the specification. Five groups of low-pressure cylinders 12 are provided, and the five groups of low-pressure cylinders 12 are respectively connected to the five low-pressure upper rollers 111, and respectively drive the five low-pressure upper rollers 111 to reciprocate in the vertical direction. Each low-pressure upper roller 111 is driven individually, so that the pressure value of the low-pressure upper roller 111 can be adjusted by the low-pressure cylinder 12, so that the pressure value of each low-pressure upper roller 111 can be different, and the amount of pressure applied to the slab 31 by each low-pressure upper roller 111 can also be different, so that the slab 31 gradually becomes thinner during the pressing process after passing through the low-pressure pressing device 1 and the high-pressure pressing device 2, so that the slab 31 can achieve the effect of equal-strength pressure during the pressing process.

[0035] Specifically, in order to ensure that the pressing force of the high-pressure roller 21 is greater than the pressing force of the low-pressure roller 11, the roller diameter of the low-pressure upper roller 111 and the low-pressure lower roller 112 can be 400 mm, and the single-roller pressure can reach 5500 kN. The roller diameter of the high-pressure upper roller 211 and the high-pressure lower roller 212 can be 580 mm, and the single-roller pressure can reach 10000 kN. The roller diameter of the high-pressure roller 21 is set larger to facilitate the high-pressure roller 21 to bear a larger pressing force.

[0036] Alternatively, if Figure 1 As shown, the low-pressure pressing device 1 also includes a low-pressure driving mechanism, which is used to drive the low-pressure lower pressing roller 112 and the low-pressure upper pressing roller 111 to rotate around their axes, and the high-pressure pressing device 2 also includes a high-pressure driving mechanism, which is used to drive the high-pressure lower pressing roller 212 and the high-pressure upper pressing roller 211 to rotate around their axes.

[0037] In this embodiment, a high-pressure driving mechanism is provided to drive the high-pressure upper pressure roller 211 and the high-pressure lower pressure roller 212 to rotate around their axes, the high-pressure upper pressure roller 211 rotates counterclockwise, and the high-pressure lower pressure roller 212 rotates clockwise, so as to drive the slab 31 to move toward the positive direction of the X-axis during the rotation; similarly, a low-pressure driving mechanism is provided to drive the low-pressure upper pressure roller 111 and the low-pressure lower pressure roller 112 to rotate around their axes, the low-pressure upper pressure roller 111 rotates counterclockwise, and the low-pressure lower pressure roller 112 rotates clockwise, so as to drive the slab 31 to move toward the positive direction of the X-axis during the rotation.

[0038] Specifically, the specific driving structure of the low-pressure upper pressing roller 111 and the high-pressure upper pressing roller 211 in the rotation and reciprocating motion in the vertical direction can refer to the invention patent CN118321342A.

[0039] Alternatively, if Figure 4 As shown, the low-pressure driving mechanism includes multiple groups of first connecting flanges, first universal couplings, first motors and first reducers. The low-pressure upper pressure roller 111 and the low-pressure lower pressure roller 112 are respectively connected to a corresponding group of the first universal couplings, the first connecting flanges, the first reducer and the first motor in sequence. The high-pressure driving mechanism includes multiple groups of second connecting flanges, second universal couplings, second motors 231 and second reducers 232. The high-pressure upper pressure roller 211 and the high-pressure lower pressure roller 212 are respectively connected to a corresponding group of the second universal couplings, the second connecting flanges, the second reducer 232 and the second motor 231 in sequence.

[0040] In this embodiment, the high-voltage drive mechanism is configured as four groups of second connecting flanges, second universal couplings, second motors 231 and second reducers 232, corresponding to two high-voltage upper pressure rollers 211 and two high-voltage lower pressure rollers 212, the ends of the high-voltage upper pressure roller 211 and the high-voltage lower pressure roller 212 are connected to the second connecting flanges through the second universal couplings, the second reducer 232 is connected through the second connecting flanges, the second motor 231 is connected through the second reducer 232, and the second motor 231 drives the high-voltage upper pressure roller 211 and the high-voltage lower pressure roller 212 to rotate; the structure of the low-voltage drive mechanism is the same as that of the high-voltage drive mechanism, and is not specifically described in the drawings of the specification, and the low-voltage drive mechanism is configured as ten groups of first connecting flanges, first universal couplings, first motors and first reducers , corresponding to the five low-pressure upper rollers 111 and the five low-pressure lower rollers 112, the ends of the low-pressure upper roller 111 and the low-pressure lower roller 112 are connected to the first connecting flange through the first universal coupling, connected to the first reducer through the first connecting flange, connected to the first motor through the first reducer, the first motor drives the low-pressure upper roller 111 and the low-pressure lower roller 112 to rotate, the present invention arranges the first motor or the second motor 231 separately on the two pairs of high-pressure upper rollers 211 and high-pressure lower rollers 212, five pairs of low-pressure upper rollers 111 and low-pressure lower rollers 112, which can avoid the phenomenon that the individual high-pressure upper roller 211, high-pressure lower roller 212, low-pressure upper roller 111 and low-pressure lower roller 112 slip due to large pressing amount and pressing force and cannot move the slab 31 along the X-axis direction.

[0041] Alternatively, if Figure 4As shown, in the low-pressure driving mechanism, the multiple first reducers corresponding to the five low-pressure upper pressure rollers 111 and the multiple first reducers corresponding to the five low-pressure lower pressure rollers 112 are respectively arranged alternately along the arrangement direction of the five groups of low-pressure pressure rollers 11, and in the high-pressure driving mechanism, the two second reducers 232 corresponding to the two high-pressure lower pressure rollers 212 and the two second reducers 232 corresponding to the two high-pressure upper pressure rollers 211 are respectively arranged alternately along the arrangement direction of the two groups of high-pressure pressure rollers 21.

[0042] In the high-pressure driving mechanism of the present embodiment, the two second reducers 232 corresponding to the two high-pressure lower pressure rollers 212 are roughly located in the same horizontal plane, and the two second reducers 232 corresponding to the two high-pressure upper pressure rollers 211 are also roughly located in the same horizontal plane. The two second reducers 232 on the two high-pressure upper pressure rollers 211, or the two second reducers 232 on the two high-pressure lower pressure rollers 212 are respectively arranged to be staggered in the X-axis direction, which can avoid mutual interference due to the excessive volume of the second reducers 232; the arrangement of the first reducer is the same as the arrangement of the second reducer 232, and is not specifically introduced in the drawings of the specification. The multiple first reducers located in the same horizontal plane on the low-pressure driving mechanism, such as the five first reducers on the five low-pressure upper pressure rollers 111, or the five first reducers on the five low-pressure lower pressure rollers 112, are arranged to be staggered in the X-axis direction, which can avoid mutual interference due to the excessive volume of the first reducers.

[0043] Specifically, in the low-pressure drive mechanism, the total lengths of the first connecting flange and the first universal coupling in each two adjacent groups along the roller axis are different, that is, one is long and the other is short, so that the first reducers in each two adjacent groups are staggered along the arrangement direction, thereby making multiple groups of first reducers staggered along the arrangement direction. Further, in the low-pressure drive mechanism, the first motor in the group with a longer total length of the first connecting flange and the first universal coupling extends perpendicular to the axial direction of the low-pressure roller 11, and the first motor in the group with a shorter total length of the first connecting flange and the first universal coupling extends parallel to the axial direction of the low-pressure roller 11, so as to shorten the size of the low-pressure drive mechanism in the Y-axis direction. On the low-pressure drive mechanism, when the spacing between the low-pressure rollers 11 is large, the five first reducers on the five low-pressure upper rollers 111, or the five first reducers on the five low-pressure lower rollers 112, can also be arranged side by side.

[0044] Similarly, in the high-pressure drive mechanism, the total lengths of the second connecting flange and the second universal coupling in each two adjacent groups along the axial direction of the roller are different, that is, one is long and the other is short, so that the second reducers 232 in each two adjacent groups are staggered along the arrangement direction, thereby making multiple groups of second reducers 232 staggered along the arrangement direction. Further, in the high-pressure drive mechanism, the second motor 231 in the group with a longer total length of the second connecting flange and the second universal coupling extends perpendicular to the axial direction of the high-pressure roller 21, and the second motor 231 in the group with a shorter total length of the second connecting flange and the second universal coupling extends parallel to the axial direction of the high-pressure roller 21, so as to shorten the size of the high-pressure drive mechanism in the Y-axis direction.

[0045] Alternatively, if Figure 2 and Figure 3 As shown, the low-pressure pressing device 1 also includes a first frame, and the high-pressure pressing device 2 also includes a second frame 24. The first frame and the second frame 24 are both hollow structures. The five low-pressure upper rollers 111 and the five low-pressure lower rollers 112 are respectively connected side by side on the upper side and the lower side inside the first frame, and the two high-pressure upper rollers 211 and the two high-pressure lower rollers 212 are respectively connected side by side on the upper side and the lower side inside the second frame 24.

[0046] In this embodiment, a second frame 24 is set as the main structure of the high-pressure down-pressing device 2. The second frame 24 is a hollow structure, which provides an installation position for the high-pressure upper pressure roller 211 and the high-pressure lower pressure roller 212. The high-pressure upper pressure roller 211 and the high-pressure lower pressure roller 212 can be connected to the upper and lower sides of the hollow part of the second frame 24 respectively; the structure of the low-pressure down-pressing device 1 is similar to that of the high-pressure down-pressing device 2, and is not specifically introduced in the drawings of the specification. A first frame is set as the main structure of the low-pressure down-pressing device 1. The first frame is a hollow structure, which provides an installation position for the low-pressure upper pressure roller 111 and the low-pressure lower pressure roller 112. The low-pressure upper pressure roller 111 and the low-pressure lower pressure roller 112 can be connected to the upper and lower sides of the hollow part of the first frame respectively.

[0047] Alternatively, if Figure 1 , Figure 5 and Figure 6 As shown, a second low-pressure pressing device 1 is provided at one end of the low-pressure pressing device 1 away from the high-pressure pressing device 2 , or at one end of the high-pressure pressing device 2 away from the low-pressure pressing device 1 .

[0048] In this embodiment, when the movement speed of the slab 31 along the X-axis direction is relatively fast, two low-pressure down-pressing devices 1 can be set at the end of the high-pressure down-pressing device 2 facing the negative direction of the X-axis, and the two low-pressure down-pressing devices 1 and one high-pressure down-pressing device 2 are used in combination to ensure that the liquid phase solidification end 32 inside the slab 31 can be located between the two high-pressure pressing rollers 21, thereby improving the down-pressing quality; or another low-pressure down-pressing device 1 can be arranged at the end of the high-pressure down-pressing device 2 facing the positive direction of the X-axis, and after the liquid phase in the center of the slab 31 is completely solidified, the slab 31 continues to be pressed to improve the down-pressing quality.

[0049] Optionally, the low-pressure pressing device 1 and the high-pressure pressing device 2 have the same length in the moving direction of the slab 31 .

[0050] In this embodiment, the dimensions of the low-pressure pressing device 1 and the high-pressure pressing device 2 in the X-axis direction are set to the same value, so that when there are three pressing devices in total, according to the different moving speeds of the slab 31 in the X-axis direction, the two pressing devices facing the positive direction of the X-axis direction are exchanged. When the slab 31 moves faster, such as Figure 5 As shown, the arrangement from left to right is low pressure pressing device 1, low pressure pressing device 1, and high pressure pressing device 2; when the movement speed of the slab 31 is slow, such as Figure 6 As shown, the arrangement from left to right is low-pressure pressing device 1, high-pressure pressing device 2, and low-pressure pressing device 1.

[0051] Alternatively, if Figure 2 As shown, each group of the low-pressure cylinders 12 and each group of the high-pressure cylinders 22 are two, the two low-pressure cylinders 12 are respectively driven and connected to the two ends of the low-pressure upper pressure roller 111 along its length direction, and the two high-pressure cylinders 22 are respectively driven and connected to the two ends of the high-pressure upper pressure roller 211 along its length direction.

[0052] In this embodiment, two high-pressure cylinders 22 are arranged on each high-pressure upper pressure roller 211, and the two high-pressure cylinders 22 are arranged at both ends of the high-pressure upper pressure roller 211 along the Y-axis direction, specifically close to the two ends, so that the forces at both ends of the high-pressure upper pressure roller 211 are balanced, so that the pressure applied by the high-pressure upper pressure roller 211 to the slab 31 is more uniform; the arrangement of the low-pressure cylinder 12 is the same as that of the high-pressure cylinder 22, and is not specifically introduced in the drawings of the specification; two low-pressure cylinders 12 are arranged on each low-pressure upper pressure roller 111, and the two low-pressure cylinders 12 are arranged at both ends of the low-pressure upper pressure roller 111 along the Y-axis direction, specifically close to the two ends, so that the forces at both ends of the low-pressure upper pressure roller 111 are balanced, so that the pressure applied by the low-pressure upper pressure roller 111 to the slab 31 is more uniform.

[0053] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A slab multi-roller independent pressing system, characterized in that: It comprises a low-pressure pressing device (1) and a high-pressure pressing device (2) arranged in parallel, and the slab (31) is used to pass through the low-pressure pressing device (1) and the high-pressure pressing device (2) in sequence, the low-pressure pressing device (1) comprises five groups of low-pressure rollers (11), and the high-pressure pressing device (2) comprises two groups of high-pressure rollers (21), the five groups of low-pressure rollers (11) and the two groups of high-pressure rollers (21) are all used to press the slab (31), the sum of the pressing amounts of the five groups of low-pressure rollers (11) is equal to the sum of the pressing amounts of the two groups of high-pressure rollers (21), and the solidification end (32) of the slab (31) is located between the two groups of high-pressure rollers (21).

2. The slab multi-roller independent pressing system according to claim 1 is characterized in that: Each group of the low-pressure rollers (11) includes a low-pressure lower roller (112) and a low-pressure upper roller (111) arranged in a vertical direction, and each group of the high-pressure rollers (21) includes a high-pressure lower roller (212) and a high-pressure upper roller (211) arranged in a vertical direction, the low-pressure lower roller (112) and the high-pressure lower roller (212) are used to receive the slab (31), and the low-pressure upper roller (111) and the high-pressure upper roller (211) are used to perform reciprocating motion in the vertical direction.

3. The slab multi-roller independent pressing system according to claim 2 is characterized in that: The low-pressure pressing device (1) further comprises five groups of low-pressure cylinders (12), and the five groups of low-pressure cylinders (12) are used to respectively drive the five low-pressure upper pressure rollers (111) to perform reciprocating motion in the vertical direction. The high-pressure pressing device (2) further comprises two groups of high-pressure cylinders (22), and the two groups of high-pressure cylinders (22) are used to respectively drive the two high-pressure upper pressure rollers (211) to perform reciprocating motion in the vertical direction.

4. The slab multi-roller independent pressing system according to claim 2 is characterized in that: The low-pressure pressing device (1) also includes a low-pressure driving mechanism, which is used to drive the low-pressure lower pressing roller (112) and the low-pressure upper pressing roller (111) to rotate around their axes, and the high-pressure pressing device (2) also includes a high-pressure driving mechanism, which is used to drive the high-pressure lower pressing roller (212) and the high-pressure upper pressing roller (211) to rotate around their axes.

5. The slab multi-roller independent pressing system according to claim 4 is characterized in that: The low-pressure drive mechanism comprises a plurality of groups of first connecting flanges, a first universal coupling, a first motor and a first reducer; the low-pressure upper pressure roller (111) and the low-pressure lower pressure roller (112) are respectively and sequentially connected to a corresponding group of the first universal coupling, the first connecting flange, the first reducer and the first motor; the high-pressure drive mechanism comprises a plurality of groups of second connecting flanges, a second universal coupling, a second motor (231) and a second reducer (232); the high-pressure upper pressure roller (211) and the high-pressure lower pressure roller (212) are respectively and sequentially connected to a corresponding group of the second universal coupling, the second connecting flange, the second reducer (232) and the second motor (231).

6. The slab multi-roller independent pressing system according to claim 5 is characterized in that: In the low-pressure driving mechanism, the plurality of first reducers corresponding to the five low-pressure upper pressure rollers (111) and the plurality of first reducers corresponding to the five low-pressure lower pressure rollers (112) are respectively arranged alternately along the arrangement direction of the five groups of low-pressure pressure rollers (11); and in the high-pressure driving mechanism, the two second reducers (232) corresponding to the two high-pressure lower pressure rollers (212) and the two second reducers (232) corresponding to the two high-pressure upper pressure rollers (211) are respectively arranged alternately along the arrangement direction of the two groups of high-pressure pressure rollers (21).

7. The slab multi-roller independent pressing system according to claim 2 is characterized in that: The low-pressure pressing device (1) also includes a first frame, and the high-pressure pressing device (2) also includes a second frame (24). The first frame and the second frame (24) are both hollow structures. The five low-pressure upper pressing rollers (111) and the five low-pressure lower pressing rollers (112) are respectively connected side by side on the upper side and the lower side of the first frame, and the two high-pressure upper pressing rollers (211) and the two high-pressure lower pressing rollers (212) are respectively connected side by side on the upper side and the lower side of the second frame (24).

8. The slab multi-roller independent pressing system according to claim 1 is characterized in that: A second low-pressure pressing device (1) is provided at one end of the low-pressure pressing device (1) away from the high-pressure pressing device (2), or at one end of the high-pressure pressing device (2) away from the low-pressure pressing device (1).

9. The slab multi-roller independent pressing system according to claim 7, characterized in that: The low-pressure pressing device (1) and the high-pressure pressing device (2) have the same length in the moving direction of the slab (31).

10. The slab multi-roller independent pressing system according to claim 3, characterized in that: Each group of the low-pressure cylinders (12) and each group of the high-pressure cylinders (22) are two in number, and the two low-pressure cylinders (12) are respectively drivingly connected to the two ends of the low-pressure upper pressure roller (111) along its length direction, and the two high-pressure cylinders (22) are respectively drivingly connected to the two ends of the high-pressure upper pressure roller (211) along its length direction.

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