An upper and lower cross beam of a vertical roll stand and a vertical roll rolling mill

Abstract

The application provides a vertical-roller rack upper and lower cross beams and a vertical-roller rolling machine, and relates to the technical field of vertical-roller rolling machines.The vertical-roller rack upper and lower cross beams comprise an upper connecting beam located at the center line of the upper cross beam and a lower connecting beam located at the center line of the lower cross beam, the upper connecting beam is located between two upper cross beams and connected with the two upper cross beams respectively, and the top end of the upper connecting beam is connected with the top end of the two upper cross beams respectively; the lower connecting beam is located between two lower cross beams and connected with the two lower cross beams respectively, and the top end of the lower connecting beam is connected with the top end of the two lower cross beams respectively. In this way, compared with the parallel arrangement of two upper cross beams or two lower cross beams, the structural strength of the center line positions of the two upper cross beams and the two lower cross beams is improved, and the structural strength of the working rack is further improved.

Description

Technical Field

[0001] This invention relates to the field of vertical roll mill technology, and more specifically, to a vertical roll mill stand with upper and lower crossbeams and a vertical roll mill. Background Technology

[0002] Currently, the working frame of a vertical roll mill includes two parallel upper crossbeams and two parallel lower crossbeams. The working ends of the two working rolls of the vertical roll mill pass through the two upper crossbeams from top to bottom and are located between the two upper crossbeams and the two lower crossbeams. Generally, in order to meet the process requirements of rolling steel billets of different sizes, two transmission boxes are installed between the two upper crossbeams and the two lower crossbeams. The two transmission boxes are slidably connected to the upper crossbeams and the lower crossbeams respectively, and the working ends of the two working rolls are respectively installed on the corresponding transmission boxes. The distance between the two working ends is adjusted by sliding the transmission boxes on the upper crossbeams and the lower crossbeams.

[0003] However, because the working ends of the work rolls can slide within the work stand, the span of the upper and lower crossbeams is relatively large, affecting the structural strength of the work stand. In particular, during rolling, the two drive directions move to the middle position of the upper and lower crossbeams, and the upper and lower crossbeams are subjected to a large load, which may cause deformation of the upper and lower crossbeams, thereby changing the distance between the working ends of the two work ends, which in severe cases affects the rolling accuracy of the steel billet. Summary of the Invention

[0004] The problem this invention addresses is how to improve the structural strength of the machine frame.

[0005] To address the aforementioned problems, the present invention provides an upper and lower crossbeam of a vertical roller mill frame, comprising two parallel upper crossbeams and two parallel lower crossbeams, and further comprising an upper connecting beam located at the centerline of the upper crossbeams and a lower connecting beam located at the centerline of the lower crossbeams. The upper connecting beam is located between the two upper crossbeams and is connected to both of the upper crossbeams, with the top end of the upper connecting beam connected to the top end of both upper crossbeams. The lower connecting beam is located between the two lower crossbeams and is connected to both of the lower crossbeams, with the top end of the lower connecting beam connected to the top end of both lower crossbeams.

[0006] Optionally, the upper connecting beam is slidably connected to the two upper crossbeams respectively.

[0007] Optionally, the upper connecting beam includes an upper beam body, a positioning pin, and a fixing pin. The positioning pin is installed on the upper crossbeam at the rolling centerline. The upper beam body is slidably connected between the two upper crossbeams. The fixing pin is inserted into the upper beam body and the positioning pin respectively.

[0008] Optionally, the upper beam body includes a pad, which is installed on the side end of the upper beam body facing the upper crossbeam, and the pad is slidably connected to the side wall of the upper crossbeam.

[0009] Optionally, the lower connecting beam is slidably connected to the two lower crossbeams respectively.

[0010] Optionally, the lower connecting beam includes a lower beam body, a support, and a lower fixing pin. The bottom of the lower beam body is provided with a connecting seat. The lower beam body is slidably connected between the two lower crossbeams. The support is installed on the lower crossbeam at the rolling centerline. The connecting seat and the support are respectively provided with positioning holes. The lower fixing pin is inserted into the connecting seat and the support through the positioning holes.

[0011] Optionally, the upper and lower crossbeams of the vertical roller frame also include lifting hooks, the top of the lower fixing pin is provided with a hook ring, the bottom end of the lifting hook is inserted into the hook ring, and the top end of the lifting hook extends out from between the two upper crossbeams.

[0012] Optionally, a steel pipe is provided on the connecting seat, the steel pipe is connected to the positioning hole, and the lower fixing pin is slidably connected to the steel pipe.

[0013] Optionally, the steel pipe is provided with a horizontal groove and a vertical groove that are perpendicular to each other. The horizontal groove is located above the vertical groove and communicates with the vertical groove. Both the horizontal groove and the vertical groove are communicated with the steel pipe. A sliding rod is provided on the lower fixing pin. The sliding rod is slidably connected to the horizontal groove and the vertical groove respectively.

[0014] Compared with the prior art, the upper and lower crossbeams of the vertical roller mill frame of the present invention are connected between the two upper crossbeams by an upper connecting beam located at the center line of the upper crossbeam, and the top of the upper connecting beam is connected to the top of the two upper crossbeams respectively, so that the center line positions of the two upper crossbeams can be connected by the upper connecting beam to form an integral structure; and then connected between the two lower crossbeams by a lower connecting beam located at the center line of the lower crossbeam, and the top of the lower connecting beam is connected to the top of the two lower crossbeams respectively, so that the center line positions of the two lower crossbeams can be connected by the lower connecting beam to form an integral structure. In this way, compared with the two upper crossbeams or the two lower crossbeams being arranged only in parallel, the arrangement of the upper and lower connecting beams can connect the center line positions of the two upper crossbeams and the two lower crossbeams respectively, thereby improving the structural strength of the center line positions of the two upper crossbeams and the two lower crossbeams, avoiding relative movement between the two upper crossbeams and the two lower crossbeams, and thus improving the structural strength of the working frame.

[0015] On the other hand, the present invention also provides a vertical roll mill, including the upper and lower crossbeams of the vertical roll mill stand as described above.

[0016] The advantages of this vertical roll mill over existing technologies are the same as those of the upper and lower crossbeams of the vertical roll mill stand, which will not be elaborated here. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the upper and lower crossbeams of the vertical roller mill stand in the rolling state in an embodiment of the present invention;

[0018] Figure 2 This is a view of the upper and lower crossbeams of the vertical roller mill stand in the rolling state in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the upper and lower crossbeams of the vertical roller mill frame in the roller changing state in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the steel pipe structure in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Upper connecting beam; 11-Upper beam body; 12-Positioning pin; 13-Fixing pin; 2-Lower connecting beam; 21-Lower beam body; 22-Support; 23-Lower fixing pin; 24-Steel pipe; 241-Horizontal groove; 242-Vertical groove; 25-Slide rod; 3-Lifting hook. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] In the attached diagram, the Z-axis represents the vertical direction, i.e., up and down, with the positive direction of the Z-axis (where the arrow points) indicating up and the negative direction indicating down. The X-axis represents the horizontal direction, with the positive direction of the X-axis (where the arrow points) indicating left and the negative direction indicating right. The Y-axis represents the front and back direction, with the positive direction of the Y-axis (where the arrow points) indicating front and the negative direction indicating back. It should be noted that the aforementioned representations of the Z, X, and Y axes are for ease of description and simplification of the invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0026] Currently, the working frame of a vertical roll mill includes two parallel upper crossbeams and two parallel lower crossbeams. The working ends of the two working rolls of the vertical roll mill pass through the two upper crossbeams from top to bottom and are located between the two upper crossbeams and the two lower crossbeams. Generally, in order to meet the process requirements of rolling steel billets of different sizes, two transmission boxes are installed between the two upper crossbeams and the two lower crossbeams. The two transmission boxes are slidably connected to the upper crossbeams and the lower crossbeams respectively, and the working ends of the two working rolls are respectively installed on the corresponding transmission boxes. The distance between the two working ends is adjusted by sliding the transmission boxes on the upper crossbeams and the lower crossbeams.

[0027] However, because the working ends of the work rolls can slide within the work stand, the span of the upper and lower crossbeams is relatively large, affecting the structural strength of the work stand. In particular, during rolling, the two drive directions move to the middle position of the upper and lower crossbeams, resulting in a large load on them. This can cause deformation of the upper and lower crossbeams, altering the distance between their working ends. In severe cases, this can affect the rolling accuracy of the steel billet. Figure 1 As shown, a traditional vertical roll mill frame may include two upper crossbeams 10 and two lower crossbeams 20, which are parallel to each other. The centerline of the traditional vertical roll mill frame is taken as the centerline of the upper crossbeam 10. Transmission boxes are set on both sides of the centerline. The two transmission boxes are assembled between the upper crossbeam 10 and the lower crossbeam 20 and slide linearly along the axial direction of the upper crossbeam 10 and the lower crossbeam 20. The two transmission boxes are respectively connected to the working ends of the work rolls, so the upper crossbeam 10 and the lower crossbeam 20 bear a large load. In particular, during the rolling of the work rolls, the two transmission boxes and the work rolls connected to the two transmission boxes are concentrated at the centerline of the upper crossbeam 10, which causes the centerline of the upper crossbeam 10 and the lower crossbeam 20 to bear concentrated loads, so that the middle part of the crossbeam moves relative to each other in the front-back or up-down direction, and thus deforms, affecting the structural rigidity of the upper crossbeam 10 and the lower crossbeam 20.

[0028] Combination Figures 1 to 3 As shown, in one aspect, the present invention provides an upper and lower crossbeam of a vertical roller mill frame, including two parallel upper crossbeams 10 and two parallel lower crossbeams 20, and also includes an upper connecting beam 1 located at the center line of the upper crossbeams 10 and a lower connecting beam 2 located at the center line of the lower crossbeams 20. The upper connecting beam 1 is located between the two upper crossbeams 10 and is connected to the two upper crossbeams 10 respectively, and the top end of the upper connecting beam 1 is connected to the top end of the two upper crossbeams 10 respectively; the lower connecting beam 2 is located between the two lower crossbeams 20 and is connected to the two lower crossbeams 20 respectively, and the top end of the lower connecting beam 2 is connected to the top end of the two lower crossbeams 20 respectively.

[0029] Specifically, the Z-axis represents the height of the vertical roll mill stand, and the Y-axis represents the front-to-back direction of the vertical roll mill stand. Two upper crossbeams 10 are mounted parallel above two lower crossbeams 20, meaning that during rolling, the slab can pass through the vertical roll mill stand between the upper crossbeams 10 and the lower crossbeams 20. An upper connecting beam 1 is located between the two upper crossbeams 10, at the centerline of the upper crossbeams 10. The front and rear sides of the upper connecting beam 1 are connected to the opposite sides of the two upper crossbeams 10, and the top of the upper connecting beam 1 is connected to the top of the two upper crossbeams 10. Similarly, a lower connecting beam 2 is located between the two lower crossbeams 20, at the centerline of the lower crossbeams 20. The front and rear sides of the lower connecting beam 2 are connected to the opposite sides of the two lower crossbeams 20, and the top of the lower connecting beam 2 is connected to the top of the two lower crossbeams 20. It can be understood that a distance is left between the upper connecting beam 1 and the lower connecting beam 2 to avoid affecting the rolling of the steel slab. Before rolling, the upper connecting beam 1 is assembled between the two upper crossbeams 10, and the lower connecting beam 2 is assembled between the two lower crossbeams 20. The upper connecting beam 1 connects the two upper crossbeams 10 at their center lines, and the lower connecting beam 2 connects the two lower crossbeams 20 at their center lines. Taking the lower crossbeams 20 as an example, the lower connecting beam 2 connects the two lower crossbeams 20 at their center lines to form an integral structure. Thus, the lower connecting beam 2 can counteract the relative movement between the two lower crossbeams 20. For example, in the front-back direction, the lower connecting beam 2 can prevent the two lower crossbeams 20 from moving closer or further apart. The center line of the upper crossbeam 10 refers to the line of symmetry of the upper crossbeam 10, that is, the straight line connecting two points equidistant from the two ends of the upper crossbeam 10 along its length.

[0030] Therefore, in this embodiment, an upper connecting beam 1 located at the center line of the upper crossbeam 10 connects the two upper crossbeams 10, and the top of the upper connecting beam 1 connects to the top of the two upper crossbeams 10 respectively, so that the center line positions of the two upper crossbeams 10 can be connected by the upper connecting beam 1 to form an integral structure; then, a lower connecting beam 2 located at the center line of the lower crossbeam 20 connects the two lower crossbeams 20, and the top of the lower connecting beam 2 connects to the top of the two lower crossbeams 20 respectively, so that the center line positions of the two lower crossbeams 20 can be connected by the lower connecting beam 2 to form an integral structure. In this way, compared to the two upper crossbeams 10 or the two lower crossbeams 20 being arranged only in parallel, the arrangement of the upper connecting beam 1 and the lower connecting beam 2 can connect the center line positions of the two upper crossbeams 10 and the two lower crossbeams 20 respectively, thereby improving the structural strength of the center line positions of the two upper crossbeams 10 and the two lower crossbeams 20, avoiding relative movement between the two upper crossbeams 10 and the lower crossbeams 20, and thus improving the structural strength of the working frame.

[0031] Optionally, the upper connecting beam 1 is slidably connected to the two upper crossbeams 10 respectively.

[0032] Specifically, taking the upper crossbeam 10 located in the positive Y-axis direction as an example, a sliding plate can be installed on the top of the upper connecting beam 1. The sliding plate is located at the front end of the upper connecting beam 1 and extends towards the upper crossbeam 10. A slide rail is provided on the side end of the upper crossbeam 10 facing the upper connecting beam 1. The length direction of the slide rail is consistent with the axial direction of the upper crossbeam 10. The sliding plate rests on the slide rail, and a copper plate is installed on the bottom end of the sliding plate facing the slide rail. The sliding plate is slidably connected to the slide rail through the copper plate, thereby realizing the sliding of the upper connecting beam 1 along the axial direction of the upper crossbeam 10. That is, when performing a roller changing operation on the left side of the upper crossbeam 10, the upper connecting beam 1 can be slid to the right side of the upper crossbeam 10. When performing a roller changing operation on the right side of the upper crossbeam 10, the upper connecting beam 1 can be slid to the left side of the upper crossbeam 10 to avoid the upper connecting beam 1 interfering with the roller changing operation.

[0033] Thus, by sliding the upper connecting beam 1 to the two upper crossbeams 10 respectively, the upper connecting beam 1 can be slid to the non-roll changing side of the upper crossbeam 10 during the roll changing operation, avoiding the need to remove the upper connecting beam 1 from between the two upper crossbeams 10 during the roll changing operation, thereby saving the roll changing operation time and improving the efficiency of the roll changing operation.

[0034] Optionally, combined Figures 1 to 3 As shown, the upper connecting beam 1 includes an upper beam body 11, a positioning pin 12, and a fixing pin 13. The upper beam body 11 is slidably connected between two upper crossbeams 10. The positioning pin 12 is installed on the upper crossbeam 10 at the rolling centerline. The fixing pin 13 is inserted into the upper beam body 11 and the positioning pin 12 respectively.

[0035] Specifically, the positioning pin 12 is bolted to the upper crossbeam 10 at the rolling centerline. This can also be understood as the positioning pin 12 being mounted at the centerline of the upper crossbeam 10, i.e., the middle of the upper crossbeam 10. The upper beam body 11 is a plate-like structure, slidably connected between the two upper crossbeams 10. A connecting hole is provided at the top of the upper beam body 11. The fixing pin 13 may include a horizontal pin shaft and a connecting plate welded to one end of the horizontal pin shaft. A positioning hole is provided on the connecting plate. The end of the pin shaft away from the connecting plate is inserted into the connecting hole on the upper beam body 11. The connecting plate is inserted into the positioning pin 12 through the positioning hole. During rolling, the fixing pin 13 is inserted into the positioning pins on both the upper beam body 11 and the upper crossbeam 10, respectively. This increases the structural strength of the middle section of the two upper crossbeams 10. During roll changing, simply releasing the fixing pin 13 from the insertion of the fixing pins into the upper beam body 11 and the positioning pin 12 allows the upper beam body 11 to slide on the upper crossbeam 10. Generally, the rolling centerline can be understood as the line connecting two points on the upper crossbeam 10 in the rolling direction, which is also the centerline of the upper crossbeam 10. The distances from both ends of the upper crossbeam 10 in the length direction to the rolling centerline are equal.

[0036] It is understandable that at the end of the roller changing operation, the upper beam body 11 is slid in the opposite direction to the center line position of the upper crossbeam 10, and the upper beam body 11 is fixed by the fixing pin 13 being inserted into the upper beam body 11 and the positioning pin 12 respectively.

[0037] Thus, by installing the positioning pin 12 on the upper crossbeam 10 at the rolling centerline, and inserting the fixing pin 13 into the upper beam body 11 and the positioning pin 12 respectively, the connection method between the upper connecting beam 1 and the upper crossbeam 10 is simplified, thereby improving the disassembly efficiency of the upper connecting beam 1 during roll changing operations.

[0038] In another embodiment, a groove with an upward-facing opening can be provided at the top of the upper beam body 11, and the fixing pin 13 can be engaged with the groove.

[0039] Specifically, the top of the upper beam body 11 is provided with a mounting plate, which can be vertically welded to the slide plate mentioned above. The top of the mounting plate is provided with a groove, the groove opening is set upward, and the groove penetrates the mounting plate along the groove depth direction. The horizontal pin shaft of the fixing pin 13 can be engaged in the groove from top to bottom to fix the upper beam body 11 between the two upper crossbeams 10.

[0040] Thus, the upper beam body 11 has an upward-facing groove at its top end that engages with the fixing pin 13. This allows the operator to easily lift the fixing pin 13 upwards during roller replacement, thereby improving the disassembly efficiency of the fixing pin 13.

[0041] Optionally, combined Figures 1 to 3 As shown, the upper beam body 11 includes a pad, which is installed on the side of the upper beam body 11 facing the upper crossbeam 10, and the pad is slidably connected to the side wall of the upper crossbeam 10.

[0042] Specifically, the pad is a copper plate, and the pad is installed on the side of the upper beam body 11 facing the upper crossbeam 10 by bolts. That is, the pad is assembled on the front and rear ends of the upper beam body 11 by bolts, and the pad is slidably connected to the side wall of the upper crossbeam 10.

[0043] Thus, by installing a pad on the side end of the upper beam body 11 facing the upper crossbeam 10 and sliding it with the side wall of the upper crossbeam 10, the pad avoids direct contact between the upper beam body 11 and the upper crossbeam 10, thereby reducing the wear of the upper beam body 11 due to reciprocating sliding and extending the service life of the upper beam body 11.

[0044] Optionally, combined Figures 1 to 3 As shown, the lower connecting beam 2 is slidably connected to the two lower crossbeams 20 respectively.

[0045] Specifically, the way in which the lower connecting beam 2 is slidably connected to the two lower crossbeams 20 is similar to the way in which the upper connecting beam 1 is slidably connected to the two upper crossbeams 10.

[0046] Thus, by sliding the lower connecting beam 2 to the two lower crossbeams 20 respectively, the lower connecting beam 2 can be slid to the non-roll changing side when changing the roll, thereby avoiding the need to remove the lower connecting beam 2 from between the two lower crossbeams 20 and improving the roll changing efficiency.

[0047] Optionally, combined Figures 1 to 3 As shown, the lower connecting beam 2 includes a lower beam body 21, a support 22, and a lower fixing pin 23. The lower beam body 21 is slidably connected between two lower crossbeams 20. A connecting seat is provided at the bottom of the lower beam body 21. The support 22 is installed on the lower crossbeam 20 at the rolling centerline. The connecting seat and the support 22 are respectively provided with positioning holes. The lower fixing pin 23 is inserted into the connecting seat and the support 22 through the positioning holes.

[0048] Specifically, the lower beam body 21 is a plate-like structure, slidably connected between two lower crossbeams 20. A connecting seat is provided at the bottom of the lower beam body 21, and a support 22 is bolted to the lower crossbeam 20 at the rolling centerline (i.e., the middle of the lower crossbeam 20). The connecting seat and support 22 are each provided with positioning holes, and a lower fixing pin 23 is inserted into the connecting seat and support 22 through the positioning holes. The sliding process of the lower beam body 21 can be referenced to the sliding process of the upper beam body 11. That is, during roll changing, the lower fixing pin 23 is removed from the positioning holes on the connecting seat and support 22 to slide the lower beam body 21 to the non-roll changing side. Thus, during roll changing operations, by inserting the lower fixing pin 23 into the positioning holes on the connecting seat and support 22, the efficiency of disconnecting the lower beam body 21 from the lower crossbeam 20 can be improved, thereby increasing the efficiency of the roll changing operation.

[0049] Understandably, at the end of the roller changing operation, the lower beam body 21 is slid in the opposite direction to the center line position of the lower crossbeam 20, and the lower fixing pin 23 is inserted into the connecting seat and the support 22 through the positioning hole to fix the lower beam body 21.

[0050] Optionally, combined Figures 1 to 3 As shown, the upper and lower crossbeams of the vertical roller frame also include lifting hooks 3. The top of the lower fixing pin 23 is provided with a hook ring. The bottom end of the lifting hook 3 is inserted into the hook ring, and the top end of the lifting hook 3 extends out from between the two upper crossbeams 10.

[0051] Specifically, the top of the lower fixing pin 23 is provided with a ring-shaped hook, and the lifting hook 3 is a rod-shaped integral structure. The bottom end of the lifting hook 3 is bent and inserted into the hook ring, and the top end of the lifting hook 3 extends from between the two upper crossbeams 10. That is, during the roll changing operation, the lifting hook 3 can be manually moved down from between the two upper crossbeams 10 to the hook ring of the lower fixing pin 23 and inserted into the hook ring. Then, the lower fixing pin 23 can be manually lifted up. In this way, by setting the lifting hook 3, it is convenient to lift the lower fixing pin 23 during the roll changing operation, so as to improve the efficiency of disconnecting the connection between the lower beam body 21 and the lower crossbeam 20, thereby improving the efficiency of the roll changing operation.

[0052] Optionally, combined Figures 1 to 3 As shown, a steel pipe 24 is provided on the connecting seat, the steel pipe 24 is connected to the positioning hole, and the lower fixing pin 23 is slidably connected to the steel pipe 24.

[0053] Specifically, the steel pipe 24 is vertical and communicates with the positioning hole on the connecting seat. The steel pipe 24 can be welded to the connecting seat, and the lower fixing pin 23 is slidably connected to the steel pipe 24. That is, when it is necessary to fix the lower beam body 21, the lower fixing pin 23 can slide from the steel pipe 24 into the positioning hole on the connecting seat through the lifting hook 3. In this way, during the process of the lower fixing pin 23 being inserted into the positioning hole on the connecting seat, the sliding connection between the steel pipe 23 and the lower fixing pin 23 can guide the movement of the lower fixing pin 23, so as to avoid the lower fixing pin 23 tilting and getting stuck in the positioning hole, thereby improving the smoothness of the insertion of the lower fixing pin 23 into the positioning hole.

[0054] Optionally, as shown in Figure 4, the steel pipe 24 is provided with a horizontal groove 241 and a vertical groove 242 that are perpendicular to each other. The horizontal groove 241 is located above the vertical groove 242 and communicates with the vertical groove 242. Both the horizontal groove 241 and the vertical groove 242 are connected to the steel pipe 24, and a sliding rod 25 is provided on the lower fixing pin 23. The sliding rod 25 is slidably connected to the horizontal groove 241 and the vertical groove 242 respectively.

[0055] Specifically, both the horizontal groove 241 and the vertical groove 242 are provided on the side wall of the steel pipe 24. Both the horizontal groove 241 and the vertical groove 242 are connected to the steel pipe 24. The horizontal groove 241 is located above the vertical groove 242. One end of the horizontal groove 241 is connected to the vertical groove 242. A sliding rod 25 is provided on the lower fixing pin 23. The sliding rod 25 is slidably connected to the horizontal groove 241 and the vertical groove 242 respectively. When the lower connecting beam 2 is fixed, the sliding rod 25 is located at the bottom of the vertical groove 242. When a roller change is required, the lower fixing pin 23 moves upward via the lifting hook, and the sliding rod 25 slides upward within the vertical groove 242 via the lower fixing pin 23. When the sliding rod 25 abuts against the top of the vertical groove 242, the lower fixing pin 23 rotates horizontally toward the horizontal groove 241 via the lifting hook 3. Then, the sliding rod 25 slides from the top of the vertical groove 242 to the horizontal groove 241 until it abuts against the end of the horizontal groove 241 away from the vertical groove 242. At this point, the lower connecting beam 2 can slide on the lower crossbeam 20. Thus, during roller changes, it is unnecessary to remove the lower fixing pin 23 from the lower connecting beam 2. The sliding of the lower connecting beam 2 can be achieved simply by moving and rotating the lifting hook 3 at the upper crossbeam 10, thereby improving the efficiency of roller changes.

[0056] On the other hand, the present invention also provides a vertical roll mill, including the upper and lower crossbeams of the vertical roll mill stand as described above.

[0057] The advantages of this vertical roll mill over existing technologies are the same as those of the upper and lower crossbeams of the vertical roll mill stand, which will not be elaborated here.

[0058] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A vertical roller mill frame with upper and lower crossbeams, comprising two parallel upper crossbeams (10) and two parallel lower crossbeams (20), characterized in that, It also includes an upper connecting beam (1) located at the centerline of the upper crossbeam (10) and a lower connecting beam (2) located at the centerline of the lower crossbeam (20). The upper connecting beam (1) is located between the two upper crossbeams (10) and is connected to the two upper crossbeams (10) respectively, and the top of the upper connecting beam (1) is connected to the top of the two upper crossbeams (10) respectively. The lower connecting beam (2) is located between the two lower crossbeams (20) and is connected to the two lower crossbeams (20) respectively, and the top of the lower connecting beam (2) is connected to the top of the two lower crossbeams (20) respectively. The upper connecting beam (1) is slidably connected to the two upper crossbeams (10) respectively, and the lower connecting beam (2) is slidably connected to the two lower crossbeams (20) respectively. The lower connecting beam (2) includes a lower beam body (21), a support (22) and a lower fixing pin (23). The bottom of the lower beam body (21) is provided with a connecting seat. The lower beam body (21) is slidably connected between the two lower crossbeams (20). The support (22) is installed on the lower crossbeam (20) at the rolling centerline. The connecting seat and the support (22) are respectively provided with positioning holes. The lower fixing pin (23) is inserted into the connecting seat and the support (22) through the positioning holes respectively. It also includes a lifting hook (3), the top of the lower fixing pin (23) is provided with a hook ring, the bottom end of the lifting hook (3) is inserted into the hook ring, and the top end of the lifting hook (3) extends out from between the two upper crossbeams (10); A steel pipe (24) is provided on the connecting seat, the steel pipe (24) is connected to the positioning hole, and the lower fixing pin (23) is slidably connected to the steel pipe (24); The steel pipe (24) is provided with a horizontal groove (241) and a vertical groove (242) that are perpendicular to each other. The horizontal groove (241) is located above the vertical groove (242) and communicates with the vertical groove (242). Both the horizontal groove (241) and the vertical groove (242) are connected to the steel pipe (24). The lower fixing pin (23) is provided with a sliding rod (25). The sliding rod (25) is slidably connected to the horizontal groove (241) and the vertical groove (242) respectively. By sliding the upper connecting beam (1) to the two upper crossbeams (10) respectively, during the roll changing operation, the upper connecting beam (1) can be slid to the non-roll changing side of the upper crossbeam (10), avoiding the need to remove the upper connecting beam (1) from between the two upper crossbeams (10) during the roll changing operation, thereby saving the roll changing operation time and improving the roll changing operation efficiency; By sliding the lower connecting beam (2) to the two lower crossbeams (20) respectively, when changing the roll, the lower connecting beam (2) can be slid to the non-roll changing side, thereby avoiding removing the lower connecting beam (2) from between the two lower crossbeams (20) and improving the roll changing efficiency.

2. The upper and lower crossbeams of the vertical roller mill frame according to claim 1, characterized in that, The upper connecting beam (1) includes an upper beam body (11), a positioning pin (12) and a fixing pin (13). The upper beam body (11) is slidably connected between the two upper crossbeams (10). The positioning pin (12) is installed on the upper crossbeam (10) at the rolling centerline. The fixing pin (13) is inserted into the upper beam body (11) and the positioning pin (12) respectively.

3. The upper and lower crossbeams of the vertical roller mill frame according to claim 2, characterized in that, The upper beam body (11) includes a pad, which is installed on the side end of the upper beam body (11) facing the upper crossbeam (10), and the pad is slidably connected to the side wall of the upper crossbeam (10).

4. A vertical roll mill, characterized in that, Includes the upper and lower crossbeams of the vertical roller frame as described in any one of claims 1 to 3.

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