Multi-roller independent lifting fan-shaped section device and slab continuous casting machine

Abstract

The invention discloses a multi-roller independent lifting fan-shaped section device and a slab continuous casting machine. The fan-shaped section device and the slab continuous casting machine comprise an inner arc frame (3), an outer arc frame (6), a placing supporting body (7), an inner arc roller and an outer arc roller. The inner arc frame is rigidly connected with the outer arc frame, all the inner arc rollers are installed on the basis of the inner arc frame, and each inner arc roller can independently conduct downward pressing and lifting actions. In the casting operation process of a continuous casting machine, the pressing-down or lifting-up height of each inner arc roller can be independently adjusted one by one according to the actual condition, the roller gaps are adjusted step by step, the roller gaps are adjusted very flexibly, and therefore the problem that pressing cannot be achieved due to the fact that the deformation resistance of a casting blank is sharply increased when multiple rollers are pressed down at the same time can be effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to a continuous casting segment, in particular to a multi-roll independent lifting segment device and a slab continuous casting machine. BACKGROUND

[0002] The continuous casting segment is the core component of the continuous steel casting production line, located downstream of the crystallizer, responsible for receiving high-temperature cast slabs with liquid cores, and through a series of mechanical and process operations, the cast slabs are completely solidified and formed.

[0003] The existing segment generally includes an inner arc frame, an outer arc frame, an inner arc roller (driven roller or free roller), an outer arc roller (driven roller or free roller), and a roll gap adjustment hydraulic cylinder, wherein the inner arc frame and the outer arc frame are assembled together through a lifting mechanism, the inner arc roller is installed based on the inner arc frame, the outer arc roller is installed based on the outer arc frame, and the roll gap adjustment hydraulic cylinder is used to drive the adjustment of the roll gap between the inner arc roller and the outer arc roller.

[0004] It should be noted that in the prior art, the specific implementation form of "roll gap adjustment hydraulic cylinder driving roll gap adjustment" is that the roll gap adjustment hydraulic cylinder drives the distance of the inner arc frame relative to the outer arc frame, thereby adjusting the roll gap between the inner arc roller and the outer arc roller.

[0005] In addition, the continuous casting slab generally has the problems of internal center segregation, center porosity and shrinkage, which causes certain quality defects of the cast slab, especially for thick slab and super-thick slab, this phenomenon is particularly serious. As a result, it seriously affects the mechanical properties of rolled steel, especially the production of super-thick steel plates is severely restricted.

[0006] The light press-down production process operation is to implement a thickness reduction of 2~3mm for the cast slab in one segment, through this measure, the quality defects of slab center segregation can be well eliminated.

[0007] The heavy press-down production process operation is to implement a thickness reduction of 10~50mm and above for the cast slab in one segment, through this measure, the quality defects of slab center porosity and shrinkage can be well eliminated.

[0008] The current problem is that:

[0009] The existing sector adjusts the roll gap by adjusting the inner arc frame to change the distance between the inner arc frame and the outer arc frame. In this adjustment mode, all the inner arc rollers are lifted or lowered as a whole with the inner arc frame. In the current roll gap adjustment mode of the "whole inner arc roller", when all the inner arc rollers are lowered by 10-50mm or more during the continuous casting process, the deformation resistance of the cast slab increases sharply and cannot be pressed. This roll gap adjustment mode can only reduce the thickness of the cast slab by 2-3mm during the continuous casting process, which can only meet the light press-down production process operation and cannot realize the heavy press-down production process operation.

[0010] In summary, the current "whole inner arc roller" roll gap adjustment mode cannot implement the "heavy press-down process operation". SUMMARY

[0011] The purpose of the present application is to provide a multi-roller independent lifting sector device that can gradually adjust the roll gap by individually adjusting the press-down or lift height of each inner arc roller.

[0012] In order to achieve the above technical purpose, the present application adopts the following technical scheme:

[0013] A multi-roller independent lifting sector device, comprising an inner arc frame, an outer arc frame, inner arc rollers and outer arc rollers; the inner arc frame is rigidly connected with the outer arc frame, all the inner arc rollers are installed on the inner arc frame, and each inner arc roller can be individually pressed down or lifted up.

[0014] A multi-roller independent lifting sector device, comprising an inner arc frame, an outer arc frame, inner arc rollers and outer arc rollers; the inner arc frame is rigidly connected with the outer arc frame; a corresponding lifting frame and a telescopic drive cylinder are arranged on the inner arc frame corresponding to each inner arc roller, each lifting frame is assembled with the inner arc frame through a lifting guide mechanism, all the lifting frames can be lifted up and down based on the inner arc frame, the telescopic drive cylinder is installed on the inner arc frame body, the telescopic end of the telescopic drive cylinder is assembled and connected with the lifting frame, all the inner arc rollers are installed on the lifting frame, and the telescopic action of the telescopic drive cylinder can drive the lifting frame to lift the inner arc rollers up and down.

[0015] Further, the sector device is provided with 6 pairs of rollers, wherein the No. 1 roller, the No. 3 roller, the No. 4 roller and the No. 6 roller are drive rollers, and the No. 2 roller and the No. 5 roller are free rollers.

[0016] Further, the telescopic drive cylinder is a hydraulic telescopic cylinder.

[0017] Further, the lifting guide mechanism is specifically implemented as follows: a plurality of vertical tracks are arranged on the side walls on both sides of the inner arc frame, a track slot is formed between two adjacent tracks, and a corresponding inner arc roller is arranged in the track slot; a sliding block is arranged at the two ends of each lifting frame, and the sliding block is embedded in the track slot between the two tracks, thereby forming the lifting guide mechanism.

[0018] Further, the sector device further comprises four placing supports arranged at the lower part of the outer arc frame.

[0019] Further, the inner arc frame is a semi-suspended structure.

[0020] A slab continuous casting machine adopting the sector device.

[0021] Compared with the prior art, the multi-roll independent lifting sector device and the slab continuous casting machine have the following main beneficial effects:

[0022] During the casting operation of the continuous casting machine, the pressing or lifting height of each inner arc roller can be adjusted individually according to the actual situation, the roll gap is adjusted gradually, the roll gap adjustment is very flexible, and therefore the thickness reduction of the cast slab can be 10-50 mm or more, the heavy pressing process operation is realized, the quality defects of slab center porosity and shrinkage are eliminated, and the production of high-quality thick slab and super-thick slab is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a front view of the multi-roll independent lifting sector device of the present application;

[0024] Figure 2 It is a left view of the sector device of the present application;

[0025] Figure 3 It is a front view of the sector device of the present application; Figure 2 It is a sectional view of A-A;

[0026] Figure 4 It is a sectional view of B-B; Figure 2

[0027] It is a sectional view of C-C. Figure 5 DETAILED DESCRIPTION Figure 2 The specific embodiments of the present application are further described as follows:

[0028] The present embodiment provides a multi-roll independent lifting sector device, which is applied to a slab continuous casting machine.

[0029] The present embodiment provides a multi-roll independent lifting sector device, which is applied to a slab continuous casting machine.

[0030] ​The most important innovation of the sector device of the embodiment is that the lifting action of each inner arc roller can be controlled individually, so that the gradual roller gap adjustment can be realized.

[0031] Specifically, referring to Figure 1 and Figure 2 ,

[0032] Those skilled in the art can understand that the sector device has an inner arc frame 3, an outer arc frame 6, a driving roller 5, and a free roller 9.

[0033] The driving roller 5 is further divided into inner arc driving rollers and outer arc driving rollers, and the free roller 9 is further divided into inner arc free rollers and outer arc free rollers. All the inner arc driving rollers and the inner arc free rollers are collectively referred to as inner arc rollers, and all the outer arc driving rollers and the outer arc free rollers are collectively referred to as outer arc rollers.

[0034] The inner arc frame 3 and the outer arc frame 6 are assembled together, and all the inner arc rollers are installed based on the inner arc frame 3, and all the outer arc rollers are installed based on the outer arc frame 6.

[0035] The above structure is the prior art.

[0036] The innovative structure of the sector device of the embodiment is as follows:

[0037] Referring to Figures 1 to 4 ,

[0038] The inner arc frame 3 and the outer arc frame 6 are assembled together through four rigid columns 4 and by using locking nuts 2, and are rigidly connected, that is, they are combined into a rigid body.

[0039] On the inner arc frame 3, a corresponding lifting frame 8 is provided for each inner arc roller. Each lifting frame 8 is assembled with the inner arc frame 3 through a lifting guide mechanism 10. Under the guidance of the lifting guide mechanism 10, all the lifting frames 8 can make up-down lifting action based on the inner arc frame 3. Then, all the inner arc rollers are installed based on the lifting frame 8, so that each inner arc roller can make up-down lifting action based on the inner arc frame 3.

[0040] Referring to Figure 5 , the lifting guide mechanism 10 is specifically implemented as follows:

[0041] A plurality of vertical rails 11 are arranged on the side walls 31 on both sides of the inner arc frame 3, the interval between two adjacent rails 11 forms a rail groove, and corresponds to an inner arc roller, a sliding block 12 is arranged at both ends of each lifting frame 8, the sliding block 12 is embedded in the rail groove between the two rails 11, thereby forming the lifting guide mechanism 10, and the two ends of the lifting frame 8 can move up and down along the rail groove between the two rails 11, so that the lifting frame 8 can perform the action of lifting up and down.

[0042] In addition, a telescopic drive cylinder 1 is also arranged for each inner arc roller, the telescopic drive cylinder 1 (the cylinder body of the telescopic drive cylinder 1) is arranged based on the inner arc frame 3 body installation, and is above the lifting frame 8, and the telescopic end (or "driving end") of the telescopic drive cylinder 1 is connected with the lifting frame 8 together downward. In this way, the telescopic action of the telescopic drive cylinder 1 can drive the lifting frame 8 to drive the inner arc roller to perform the action of lifting up and down (or the action of pressing down and lifting up).

[0043] In addition, the sector device of the embodiment is also provided with four placing supports 7, which are arranged at the lower part of the outer arc frame 6, like four standing legs, and are used for placing and storing the sector device after being offline.

[0044] The sector device of the embodiment has the following main advantages:

[0045] 1) In addition to normal roller gap adjustment (roller gap adjustment in the stop state of the continuous casting machine, and rapid adjustment of all inner arc rollers), during the casting operation of the continuous casting machine, the pressing down or lifting height of each inner arc roller can be adjusted individually according to the actual situation, and the roller gap is adjusted gradually, so that the thickness reduction of the cast slab can be 10-50mm or more, the "heavy pressing down process operation" is realized, the quality defects of slab center porosity and shrinkage hole are eliminated, and it is beneficial to produce high-quality thick slabs and super-thick slabs.

[0046] Taking the implementation of the heavy pressing down process operation as an example, when the heavy pressing down production process operation is needed, the casting speed of the continuous casting machine is adjusted, so that the liquid core solidification end region of the cast slab is just in the sector device provided by the embodiment. The 1# inner arc roller in the sector is controlled to press down, and the cast slab is subjected to pressing down extrusion, and the pressing down amount is 3-10mm, then the 2# to 6# inner arc rollers are controlled in sequence to press down one by one, and the pressing down amount of each subsequent inner arc roller is the same as that of the first inner arc roller, and when the cast slab passes through the sector device, the thickness reduction of the total pressing down amount is 10-50mm or more, so that the compression casting is realized.

[0047] Since the roll gap is adjusted gradually, the occurrence of the situation of blank holding caused by the instantaneous increase of the blank drawing resistance can be effectively avoided, and the realization of the heavy pressing process operation is possible.

[0048] In addition, the sector segment device of the embodiment has other advantages, as follows:

[0049] 2) In the sector segment device of the embodiment, a total of 6 pairs of rollers are provided, wherein the No. 1 roller, the No. 3 roller, the No. 4 roller and the No. 6 roller are driving rollers, and the No. 2 roller and the No. 5 roller are free rollers. Since 4 pairs of driving rollers are provided, the sector segment device of the embodiment has strong blank drawing capacity, so as to be able to resist a larger continuous casting blank drawing resistance.

[0050] 3) The inner arc frame 3 is completely different from the traditional structure type, and is a semi-suspended structure, only the upper half is provided with a grid structure of thick steel plates, and the lower half is completely permeable. It has high rigidity, reduces the weight of the equipment, and reduces the manufacturing cost of the equipment. In particular, the lifting frame 8 is completely exposed outside the inner arc frame 3 during the entire lifting stroke, and is not wrapped by the inner arc frame 3. The sector segment becomes more permeable, which is convenient for the emission of the heat of the cast blank, prevents the sector segment from being deformed by heat radiation, and ensures the precision of the roll gap.

[0051] 4) The inner arc frame 3 is rigidly connected with the outer arc frame 6 by the column 4, and the edge frame mode used by the traditional sector segment is abandoned, so that the sector segment becomes more permeable. It has high rigidity, reduces the weight of the equipment, reduces the manufacturing difficulty of the equipment, and reduces the manufacturing cost of the equipment. In particular, it is convenient for the emission of the heat of the cast blank, prevents the sector segment from being deformed by heat radiation, and ensures the precision of the roll gap.

[0052] 5) The lifting drive of the inner arc roller only uses one telescopic drive cylinder 1, which reduces the number of all the lifting telescopic drive cylinders of the inner arc roller, simplifies the complexity and difficulty of the hydraulic system and the three-electricity control system, and reduces the manufacturing cost and investment of the continuous casting machine.

[0053] 6) The setting of the support body 7 makes the sector segment maintenance storage area no longer need to be provided with a special storage rack, the offline storage of the sector segment becomes more convenient, saves the equipment investment, and makes the maintenance storage area smooth, which is more conducive to the safety operation of the equipment maintenance personnel.

[0054] It should be noted that in the embodiment, the telescopic drive cylinder is a hydraulic telescopic cylinder.

[0055] The above are only the preferred embodiments of the present application, and are not used to limit the protection scope of the present application, therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-roller independent lifting fan-shaped segment device, comprising an inner arc frame (3), an outer arc frame (6), an inner arc roller, and an outer arc roller; Its features are: The inner arc frame (3) is rigidly connected to the outer arc frame (6), and all inner arc rollers are installed based on the inner arc frame (3). Each inner arc roller can perform a downward and upward action independently.

2. A multi-roller independent lifting fan-shaped segment device, comprising an inner arc frame (3), an outer arc frame (6), an inner arc roller, and an outer arc roller; Its features are: The inner arc frame (3) is rigidly connected to the outer arc frame (6); On the inner arc frame (3), a corresponding lifting frame (8) and telescopic drive cylinder (1) are provided for each inner arc roller. Each lifting frame (8) is assembled with the inner arc frame (3) via a lifting guide mechanism (10), and all lifting frames (8) can move up and down based on the inner arc frame (3). The telescopic drive cylinder (1) is mounted on the inner arc frame (3) body, and the telescopic end of the telescopic drive cylinder (1) is assembled and connected to the lifting frame (8). All inner arc rollers are installed based on the lifting frame (8). The telescopic drive cylinder (1) can drive the lifting frame (8) to move the inner arc roller up and down.

3. The multi-roller independently lifting sector segment device according to claim 2, characterized in that: The sector segment device is equipped with 6 pairs of rollers, of which rollers 1, 3, 4 and 6 are drive rollers, and rollers 2 and 5 are free rollers.

4. The multi-roller independently lifting sector segment device according to claim 2, characterized in that: The telescopic drive cylinder (1) is a hydraulic telescopic cylinder.

5. The multi-roller independently lifting sector segment device according to claim 2, characterized in that: The lifting guide mechanism (10) is specifically implemented as follows: Multiple vertical rails (11) are provided on the side walls (31) on both sides of the inner arc frame (3). The interval between two adjacent rails (11) forms a rail groove, which corresponds exactly to an inner arc roller. A slider (12) is provided at both ends of each lifting frame (8). The slider (12) is embedded in the rail groove between the two rails (11), thus forming the lifting guide mechanism (10).

6. The multi-roller independently lifting sector segment device according to claim 2, characterized in that: The sector segment device also includes four mounting supports (7) located at the bottom of the outer arc frame (6).

7. The multi-roller independently lifting sector segment device according to claim 2, characterized in that: The inner arc frame (3) is a semi-suspended structure.

8. A slab continuous casting machine, characterized in that: The slab continuous casting machine employs the sector segment device as described in any one of claims 1 to 7.

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