A method for installing an offline sinking assembly integral sliding of a large wide-thick plate rolling mill

Abstract

The present application relates to a kind of large wide plate rolling mill offline sinking assembly integral slip installation method, comprising: 1) the integral assembly of rolling mill is carried out in preassembly pit;2) set up hydraulic lifting device above the preassembly pit;3) set up longitudinal slip device on the ground above the preassembly pit;4) set up transverse slip and hydraulic lifting device along the transverse center line direction of target installation position;5) the rolling mill is installed in place.The present application is for the rolling mill with the height of housing crane hoisting capacity and the rolling mill that impedes the passage of housing crane, preassembly pit is opened in the area outside the rolling line, the integral assembly of rolling mill is carried out in preassembly pit, after the integral lifting of the assembled rolling mill to ground, by ground horizontal slip, integral lifting, air horizontal slip, vertically descending to target installation position, installation is carried out in the mode, reduce the height of rolling mill in factory building during assembly, solve the problem of limited assembly height and the influence of factory building crane operation during assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of large rolling mill installation construction, and particularly relates to a large wide-thick plate rolling mill offline sinking assembly integral sliding installation method. BACKGROUND

[0002] The wide-thick plate rolling mill produces wide-thick steel plates with a maximum thickness of 500 mm, a maximum width of 5350 mm and a maximum weight of 250 t, and is widely applied to the fields of industrial buildings and equipment such as shipbuilding, pipeline, bridge, boiler, pressure vessel, offshore platform, and the fields of national defense construction such as warship, tank, tank armor and missile. The overall size and weight of the wide-thick plate rolling mill are usually large. For example, the rack of the 5m four-roll roughing mill of Baosteel is an integral rack with an external size of 15.81m x 4.67m x 2.3m and a single piece weight of 405 tons; the rack of the 5m four-roll roughing mill of Yingkou Steel Plant is a combined rack with a rack size of 16.77m x 6.1m x 2.36m and a single piece weight of 565 tons. Therefore, the height and weight of the rack of the wide-thick plate rolling mill usually far exceed the lifting capacity of the plant crane.

[0003] A Chinese invention patent with the authorized announcement number CN104512844B discloses a "super large rolling mill frame horizontal sliding and vertical hydraulic jacking and hoisting method", which comprises a horizontal sliding step and a vertical hydraulic jacking and hoisting step of the rolling mill frame. The horizontal sliding is to move the rolling mill frame into position by using front and rear sliding trolleys walking on a track. The vertical hydraulic jacking is to complete the jacking of the rolling mill frame by using a hydraulic jacking device, then remove the lower trolleys and other devices, and then lower the rolling mill frame into position by using the hydraulic jacking device. The method solves the problem of swinging of the super large rolling mill frame during hoisting and standing, has low construction cost, high safety and good stability. However, the invention is directed to the hoisting of the super large rolling mill frame, and does not involve the sliding and lifting of the rolling mill.

[0004] The Chinese invention patent with the authorization publication number CN101391267B discloses a "vertical roller mill online assembly whole landing installation method", which is suitable for the installation of large-scale hot plate (strip) rough rolling mill with vertical roller mill. The installation method adopts online assembly and whole landing, which is different from the conditions of factory environment assembly and construction site offline assembly method. The hoisting of the vertical roller mill frame does not need to make special hoisting tools, and the hoisting height (i.e. the height of the factory building) of the crane is not high, and its installation is not restricted by the installation of the hot plate (strip) rough rolling mill frame, and it does not need to reserve the vertical roller mill frame assembly site in the factory building and set up a high-precision assembly platform. However, it is aimed at the vertical roller mill with small size and weight, and adopts online assembly method. For the wide and thick plate rolling mill described in the invention, the installation method cannot be used because the frame height exceeds the lifting capacity of the factory crane, which not only cannot be assembled by the factory crane, but also affects the normal operation of the factory crane, resulting in that the work in other areas of the factory building cannot be normally carried out. In addition, for the case of replacing the rolling mill on the existing production line, the online assembly method needs to stop production and the construction time is long, which directly affects the normal production.

[0005] The Chinese invention patent with the authorization publication number CN113231477B discloses a "rolling mill horizontal sliding device with lifting function", which includes an X-direction carrying device for carrying the rolling mill in X-direction, and a Y-direction carrying device for carrying the rolling mill in Y-direction and lifting the rolling mill. The use steps are as follows: step a: complete the whole machine installation of the rolling mill on the X-direction carrying device; step b: use the X-direction carrying device to carry the rolling mill in X-direction, and move the rolling mill under the Y-direction carrying device; step c: use the Y-direction carrying device to lift the rolling mill, and then carry the rolling mill in Y-direction, and move the rolling mill above the mill pit; step d: use the Y-direction carrying device to lower the rolling mill into the mill pit, and then install the rolling mill in the mill pit. The beneficial effect is that the whole machine installation of the rolling mill is carried out first, and the whole machine carrying and landing are carried out, which greatly reduces the downtime. However, for the wide and thick plate rolling mill with frame height exceeding the lifting capacity of the factory crane described in the invention, even if the offline assembly method is used, the frame blocks the travel route of the factory crane, which not only cannot be assembled by the factory crane, but also affects the normal operation of the factory crane, resulting in that the production and construction work in other areas of the factory building cannot be normally carried out. SUMMARY

[0006] The application provides an installation method of offline sinking assembly integral sliding of a large wide-thick plate rolling mill.

[0007] To achieve the above-mentioned purposes, the application adopts the following technical scheme:

[0008] The application provides an installation method of offline sinking assembly integral sliding of a large wide-thick plate rolling mill.

[0009] 1) Constructing a pre-assembly pit in an open area outside the rolling mill target installation position; performing integral assembly of the rolling mill in the pre-assembly pit; the maximum height of the assembled rolling mill is lower than the running height of the factory crane; the rolling mill base is provided with a hoisting structure;

[0010] 2) Setting a hydraulic lifting device above the pre-assembly pit, which cooperates with the hoisting structure on the rolling mill base to lift the rolling mill from the pre-assembly pit to the ground level;

[0011] 3) Setting a longitudinal sliding device on the ground above the pre-assembly pit, which is used to move the lifted rolling mill along a longitudinal sliding track parallel to the rolling direction of the rolling mill to the outside of the target installation position, and align the rolling mill along the horizontal center line of the transmission side-operation side direction with the horizontal center line of the target installation position;

[0012] 4) Setting a horizontal sliding and hydraulic lifting device along the horizontal center line direction of the target installation position, which is used to move the rolling mill along a horizontal sliding track to the upper side of the target installation position, and lower the rolling mill into the rolling mill foundation pit where the target installation position is located;

[0013] 5) Installing the rolling mill in place.

[0014] Further, in the step 1), a rolling mill base pier is set in the pre-assembly pit to support the rolling mill base; the technical parameters related to the rolling mill installation on the rolling mill base are measured, after the adjustment of each parameter is qualified, the other parts of the rolling mill are assembled on the rolling mill base by using the factory crane, and the positions of each part are adjusted according to the rolling mill installation requirements, and finally the integral assembled rolling mill is formed.

[0015] Furthermore, in step 2), the hydraulic lifting device is mounted above the pre-assembly pit via a lifting support frame. The lifting support frame consists of lifting columns, main lifting beams, transverse lifting beams, and longitudinal lifting beams. Two lifting columns are respectively installed on both sides of the pre-assembly pit along the longitudinal sliding direction of the rolling mill, and two main lifting beams are respectively installed on the two lifting columns on the same side. Two transverse lifting beams are arranged in parallel and span across the two main lifting beams, and two longitudinal lifting beams are arranged in parallel and span across the two transverse lifting beams. The transverse lifting beams and longitudinal lifting beams form a grid-shaped frame structure around the rolling mill. Two sets of hydraulic lifting devices are installed on each longitudinal lifting beam. The hydraulic lifting devices are equipped with vertical steel strands, and the bottom end of the steel strands is equipped with anchors that connect with the hoisting structure on the rolling mill base. When the rolling mill is lifted, the four sets of hydraulic lifting devices operate synchronously.

[0016] Furthermore, in step 3), the longitudinal sliding device consists of a longitudinal sliding track beam, a longitudinal sliding track, a longitudinal sliding beam, a longitudinal sliding support frame, and a longitudinal sliding hydraulic drive device; there are two longitudinal sliding track beams, which are set on the ground outside the pre-assembly pit and inside the lifting column along the longitudinal sliding direction of the rolling mill; the two longitudinal sliding tracks are correspondingly set on two... On the longitudinal sliding track beam, there is a groove on the longitudinal sliding track. The lower part of the two longitudinal sliding beams is embedded in the groove on the corresponding longitudinal sliding track, and the upper part of the two longitudinal sliding beams is rigidly connected by a connecting rod. A longitudinal sliding hydraulic drive device is installed on the longitudinal sliding track near one end of the pre-assembly pit. The longitudinal sliding beam can move along the corresponding groove under the drive of the longitudinal sliding hydraulic drive device. The longitudinal sliding support frame is composed of longitudinal support beams and transverse support beams. The two transverse support beams are arranged in parallel and span across the two longitudinal sliding beams respectively. The two longitudinal support beams are arranged in parallel and span across the two transverse support beams respectively. The transverse support beams and the longitudinal support beams form a grid-shaped frame structure. The two longitudinal support beams are also connected by a connecting beam.

[0017] Furthermore, in step 3), after the mill is lifted above the longitudinal sliding beam, the longitudinal sliding support frame is placed on the longitudinal sliding beam. Then, the mill is lowered by the hydraulic lifting device. Through the cooperation between the mill base and the longitudinal support beam, the entire mill is supported by the longitudinal sliding support frame. After the mill falls onto the longitudinal sliding support frame, the anchor at the bottom of the steel strand of the hydraulic lifting device is separated from the hoisting structure on the mill base, in preparation for the longitudinal sliding of the mill.

[0018] Furthermore, in step 3), a steel pad is installed under the longitudinal sliding track. The steel pad is installed using the grouting pad method to ensure the levelness of the longitudinal sliding track. Two sets of longitudinal sliding hydraulic drive devices are installed, one on each of the two longitudinal sliding tracks. When the rolling mill moves along the longitudinal sliding track, the two sets of longitudinal sliding hydraulic drive devices operate synchronously.

[0019] Furthermore, in step 4), the lateral sliding and hydraulic lifting device consists of sliding lifting columns, a lateral sliding device, a lifting support frame, and a hydraulic lifting device; the lateral sliding device consists of lateral sliding track beams, lateral sliding tracks, lateral sliding beams, and a lateral sliding hydraulic drive device; there are two lateral sliding track beams, arranged along the lateral sliding direction of the rolling mill, supported above the ground on both sides of the rolling mill pit by multiple sliding lifting columns; the two lateral sliding tracks are correspondingly arranged on the two lateral sliding track beams, with grooves on the lateral sliding tracks, the lower parts of the two lateral sliding beams embedded in the grooves on the corresponding lateral sliding tracks, and the upper parts of the two lateral sliding beams rigidly connected by connecting rods; a lateral sliding hydraulic drive device is installed on the lateral sliding track away from the rolling mill pit, allowing the lateral sliding beams to laterally... Driven by the sliding hydraulic drive device, the lower edge moves along the corresponding slide groove; the lifting support frame consists of longitudinal lifting beams and transverse lifting beams. Two longitudinal lifting beams are set in parallel and span across two transverse sliding beams respectively, and two transverse lifting beams are set in parallel and span across two longitudinal lifting beams respectively. The longitudinal lifting beams and transverse lifting beams form a grid-shaped frame structure; each transverse lifting beam is equipped with two sets of hydraulic lifting devices. The hydraulic lifting devices are equipped with vertical steel strands, and the bottom end of the steel strands is equipped with anchors to connect with the hoisting structure on the mill base; when the mill is lifted, the four sets of hydraulic lifting devices operate synchronously.

[0020] Furthermore, in step 4), the mill is raised above the longitudinal sliding track by a hydraulic lifting device, and the mill is separated from the longitudinal sliding support frame. The synchronous operation of the hydraulic lifting device is achieved by a synchronous control system, which continuously monitors the encoder on the steel strand by a linear system and adjusts the hydraulic parameters in each set of hydraulic lifting devices to keep the lifting speed of the four steel strands consistent.

[0021] Furthermore, in step 4), after the rolling mill is raised to a predetermined height, it slides laterally. During the lateral sliding process, a ladder truck is used to assist in tidying up the cable lines on the lateral sliding path.

[0022] Furthermore, in step 4), after the rolling mill reaches the target installation position, the four sets of hydraulic lifting devices unload symmetrically in a diagonal direction.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1) The height of the frame of a large-scale heavy plate rolling mill (hereinafter referred to as the mill) generally exceeds 15 meters. The lifting height of the plant crane cannot meet the lifting requirements of the frame. When the frame is assembled on the ground, it will also interfere with the plant crane, affecting the normal operation of the plant crane. The present invention adopts the method of opening a pre-assembly pit, which reduces the relative height of the mill when it is assembled in the plant, thereby solving the problems of limited assembly height and the impact on the operation of the plant crane during assembly.

[0025] 2) The present application adopts an offline sinking assembly integral sliding installation method, a pre-assembly pit is opened in an area outside a rolling production line, and the rolling mill is integrally assembled in the pre-assembly pit (except for work rolls and backup rolls), the assembly of the rolling mill does not affect the normal production, and only the assembled rolling mill needs to be integrally lifted to the ground and then slid to the target installation position during the production line shutdown period, so the rolling line shutdown reconstruction period can be greatly shortened;

[0026] 3) The rolling mill is supported by rolling mill base buttresses in the pre-assembly pit, and the rolling mill is assembled on the positioned rolling mill base; the rolling mill base is symmetrically provided with hoisting structures used during integral lifting of the rolling mill, which solves the problem of no lifting point during integral lifting of the rolling mill, and reduces the height of the lifting point, and further reduces the height of the hydraulic lifting device and the horizontal sliding and hydraulic lifting device, which is conducive to improving the strength of the support structure, reducing the construction difficulty, and ensuring the safety of the rolling mill hoisting;

[0027] 4) By setting the hydraulic lifting device, longitudinal sliding device, and horizontal sliding and hydraulic lifting device, the rolling mill is vertically lifted from the pre-assembly pit, horizontally slides along the longitudinal direction on the ground, horizontally slides along the horizontal direction in the air, and is vertically lowered to the rolling mill foundation pit for installation, without the need to remove other equipment around the rolling mill, without the need for foundation treatment and reinforcement measures, and without high requirements for the site conditions near the target installation position, which is convenient for construction, has strong adaptability, and is safe and reliable;

[0028] 5) The bottom of the hydraulic lifting device and the horizontal sliding and hydraulic lifting device adopts a structure of multiple support columns and frame beams, the columns are symmetrically arranged on both sides of the pre-assembly pit and the rolling mill foundation pit, multiple hydraulic lifting devices or hydraulic lifting devices can be arranged as needed, the structure is stable, the lifting capacity is strong (the lifting weight can reach more than 1200 tons), and the integral sliding installation of various types of large wide and thick plate rolling mills can be met, thereby improving the safety and reliability of the integral sliding installation of large wide and thick plate rolling mills;

[0029] 6) The adjustment allowable deviation of key installation positions such as the levelness and parallelism of the rolling mill base installation, the perpendicularity and levelness of the rack installation, the horizontal deflection of the rack window center line, the horizontal skew of the rack window, the contact gap between the rack and the rolling mill base, and the contact gap between the cross beam and the rack are completed in an offline state, and only the elevation and center line position of the rolling mill base need to be adjusted during online installation, thereby greatly reducing the online installation and adjustment workload and improving the online installation efficiency;

[0030] 7) The pre-assembly pit can be arranged in a wide area away from the target installation position of the rolling mill, the work environment is safer, and the influence on the rolling line production is small. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate embodiments of the application and aid in explaining the application. The drawings are not intended to limit the application in any way. In the drawings:

[0032] Figure 1 is a schematic view of the installation method of the off-line sinking assembly integral sliding of a large wide and thick plate rolling mill according to the present application.

[0033] Figure 2a is a schematic view of the assembly of the rolling mill in the pre-assembly pit.

[0034] Figure 2b is a side view of Figure 2a

[0035] Figure 3a is a schematic view of the lifting of the rolling mill from the pre-assembly pit by the hydraulic lifting device.

[0036] Figure 3b is a side view of Figure 3a

[0037] Figure 4 is a schematic view of the lifting of the rolling mill from the pre-assembly pit to the ground and the setting of the longitudinal sliding device.

[0038] Figure 5a is a schematic view of the sliding of the rolling mill along the longitudinal sliding track.

[0039] Figure 5b is a side view of Figure 5a

[0040] Figure 6a is a schematic view of the sliding of the rolling mill along the transverse sliding track after the lifting by the hydraulic lifting device.

[0041] Figure 6b is a side view of Figure 6a

[0042] Figure 7 is a schematic view of the arrival of the rolling mill directly above the target installation position.

[0043] Figure 8 is a schematic view of the lowering of the rolling mill into the rolling mill pit.

[0044] BRIEF DESCRIPTION OF DRAWINGS

[0045] ​​​​In the figure: 1. Pre-assembly pit 2. Rolling mill foundation pit 31. Longitudinal sliding track 32. Longitudinal sliding track beam 33. Longitudinal sliding beam 34. Steel pad 35. Transverse support beam 36. Longitudinal support beam 37. Connecting beam 38. Longitudinal sliding hydraulic drive device 41. Transverse sliding track 42. Transverse sliding track beam 43. Sliding lifting column 44. Transverse sliding beam 45. Longitudinal lifting beam 46. Transverse lifting beam 47. Transverse sliding hydraulic drive device 5. Rolling mill 51. Rolling mill base 52. Frame 53. Upper cross beam 54. Lower cross beam 55. Hoisting structure 6. Rolling mill base pier 7. Hydraulic lifting device 71. Steel cable 72. Anchor 81. Lifting column 82. Main lifting beam 83. Transverse lifting beam 84. Longitudinal lifting beam 9. Hydraulic lifting device 10. Roll changing device foundation pit A. Target installation position DETAILED DESCRIPTION

[0046] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0047] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified and limited.

[0048] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The specific embodiments of the present application will be further described below in conjunction with the drawings:

[0050] The application discloses a large wide-thick plate rolling mill offline sinking assembly integral sliding installation method.

[0051] 1) As shown in the figure, a pre-assembly pit 1 is constructed on the ground outside the target installation position A of the rolling mill; the integral assembly of the rolling mill 5 is carried out in the pre-assembly pit 1 (as shown in the figure); the maximum height of the assembled rolling mill 5 is lower than the height of the overhead crane in the workshop; a hoisting structure 55 is arranged on the rolling mill base 51; Figure 1 Figure 2a 、 Figure 2b

[0052] 2) As shown in the figure, a hydraulic lifting device 7 is arranged above the pre-assembly pit 1 and cooperates with the hoisting structure 55 on the rolling mill base 51, and is used for lifting the rolling mill 5 from the pre-assembly pit 1 to the ground level; Figure 3a 、 Figure 3b

[0053] 3) As shown in the figure, a longitudinal sliding device is arranged on the ground above the pre-assembly pit 1, and is used for moving the lifted rolling mill 5 along the longitudinal sliding track 31 parallel to the rolling direction of the rolling mill to the outside of the target installation position A, and aligning the rolling mill 5 along the transverse center line of the driving side-operation side direction with the transverse center line of the target installation position A; Figure 4 、 Figure 5a 、 Figure 5b

[0054] 4) As shown in the figure, a transverse sliding and hydraulic lifting device is arranged along the transverse center line direction of the target installation position A, and is used for moving the rolling mill 5 along the transverse sliding track 41 to the above of the target installation position A, and lowering the rolling mill 5 into the rolling mill foundation pit 2 where the target installation position A is located; Figure 6a 、 Figure 6b 、 Figure 7 、 Figure 8

[0055] 5) The rolling mill 5 is installed in place.

[0056] Further, in the step 1), a rolling mill base supporting pier 6 is arranged in the pre-assembly pit 1 and is used for supporting the rolling mill base 51; technical parameters related to the rolling mill installation on the rolling mill base 51 are measured, after adjustment of all parameters is qualified, other parts of the rolling mill 5 are assembled on the rolling mill base 51 by using the overhead crane, and positions of all parts are adjusted according to the installation requirements of the rolling mill 5, and finally the integral assembly of the rolling mill after assembly is formed.

[0057] ​​​​​Furthermore, in step 2), the hydraulic lifting device 7 is mounted above the pre-assembly pit 1 via a lifting support frame. The lifting support frame consists of lifting columns 81, main lifting beams 82, transverse lifting beams 83, and longitudinal lifting beams 84. Two lifting columns 81 are respectively installed on both sides of the pre-assembly pit 1 along the longitudinal sliding direction of the rolling mill 5, and two main lifting beams 82 are respectively installed on the two lifting columns 81 on the same side. Two transverse lifting beams 83 are arranged in parallel and span across the two main lifting beams 82, and two longitudinal lifting beams 84 are arranged in parallel and span across the two transverse lifting beams 83. The transverse lifting beams 83 and the longitudinal lifting beams 84 form a grid-shaped frame structure around the rolling mill 5. Two sets of hydraulic lifting devices 7 are installed on each longitudinal lifting beam 84. The hydraulic lifting device 7 is equipped with vertical steel strands 71, and the bottom end of the steel strands 71 ​​is equipped with anchors 72 that are connected to the hoisting structure 55 on the rolling mill base 51. When the rolling mill 5 is lifted, the four sets of hydraulic lifting devices 7 operate synchronously.

[0058] Furthermore, in step 3), the longitudinal sliding device consists of a longitudinal sliding track beam 32, a longitudinal sliding track 31, a longitudinal sliding beam 33, a longitudinal sliding support frame, and a longitudinal sliding hydraulic drive device 38. There are two longitudinal sliding track beams 32, positioned on the ground outside the pre-assembly pit 1 and inside the lifting column 81 along the longitudinal sliding direction of the rolling mill 5. Two longitudinal sliding tracks 31 are correspondingly positioned on the two longitudinal sliding track beams 32. The longitudinal sliding tracks 31 have grooves, and the lower parts of the two longitudinal sliding beams 33 are embedded in the grooves on the corresponding longitudinal sliding tracks 31. The upper parts of the two longitudinal sliding beams 33 are rigidly connected by connecting rods. A longitudinal sliding hydraulic drive device 38 is installed on the longitudinal sliding track 31 near one end of the pre-assembly pit 1. The beam 33 can move along the corresponding slide groove under the drive of the longitudinal sliding hydraulic drive device 38; the longitudinal sliding support frame is composed of longitudinal support beams 36 and transverse support beams 35. The two transverse support beams 35 are arranged in parallel and span across the two longitudinal sliding beams 33 respectively. The two longitudinal support beams 36 are arranged in parallel and span across the two transverse support beams 35 respectively. The transverse support beams 35 and the longitudinal support beams 36 form a grid-shaped frame structure; the two longitudinal support beams 36 are also connected by a connecting beam 37.

[0059] Furthermore, in step 3), after the mill 5 is lifted above the longitudinal sliding beam 33, the longitudinal sliding support frame is placed on the longitudinal sliding beam 33, and then the hydraulic lifting device 7 drives the mill 5 to descend. Through the cooperation of the mill base 51 and the longitudinal support beam 36, the mill 5 is supported by the longitudinal sliding support frame. After the mill 5 falls onto the longitudinal sliding support frame, the anchor 72 at the bottom end of the steel strand 71 of the hydraulic lifting device 7 is separated from the hoisting structure 55 on the mill base 51, in preparation for the longitudinal sliding of the mill 5.

[0060] Further, in the step 3), a steel backing plate 34 is arranged below the longitudinal sliding track 31, the steel backing plate 34 is installed by grouting backing plate method to ensure the levelness of the longitudinal sliding track 31; two sets of longitudinal sliding hydraulic drive devices 38 are arranged on the two longitudinal sliding tracks 31 respectively; when the rolling mill 5 moves along the longitudinal sliding track 31, the two sets of longitudinal sliding hydraulic drive devices 38 act synchronously.

[0061] Further, in the step 4), the transverse sliding and hydraulic lifting device is composed of sliding lifting columns 43, a transverse sliding device, a lifting support frame and hydraulic lifting devices 9; the transverse sliding device is composed of transverse sliding track beams 42, transverse sliding tracks 41, transverse sliding beams 44 and transverse sliding hydraulic drive devices 47; the transverse sliding track beams 42 are two, arranged along the transverse sliding direction of the rolling mill 5, and supported above the ground on both sides of the rolling mill foundation pit 2 by the sliding lifting columns 43; the two transverse sliding tracks 41 are arranged on the two transverse sliding track beams 42 respectively, and a sliding groove is arranged on the transverse sliding track 41; the lower parts of the two transverse sliding beams 44 are embedded in the sliding grooves on the corresponding transverse sliding tracks 41, and the upper parts of the two transverse sliding beams 44 are rigidly connected by connecting rods; the transverse sliding hydraulic drive devices 47 are arranged on the transverse sliding tracks 41 away from the rolling mill foundation pit 2, and the transverse sliding beams 44 can move along the corresponding sliding grooves under the drive of the transverse sliding hydraulic drive devices 47; the lifting support frame is composed of longitudinal lifting beams 45 and transverse lifting beams 46, the two longitudinal lifting beams 45 are arranged in parallel and cross the two transverse sliding beams 44 respectively, and the two transverse lifting beams 46 are arranged in parallel and cross the two longitudinal lifting beams 45 respectively, and the longitudinal lifting beams 45 and the transverse lifting beams 46 form an inverted "T" frame structure; two sets of hydraulic lifting devices 9 are arranged on each transverse lifting beam 46, the hydraulic lifting devices 9 are provided with vertical steel strands, the bottom ends of the steel strands are connected to the anchorage devices which are connected to the hoisting structure 55 on the rolling mill base 51 in cooperation; when the rolling mill 5 is lifted, the four sets of hydraulic lifting devices 9 act synchronously.

[0062] Further, in the step 4), the rolling mill 5 is lifted above the longitudinal sliding track 31 by the hydraulic lifting device 9, and the rolling mill 5 is separated from the longitudinal sliding support frame; the synchronous action of the hydraulic lifting device 9 is realized by a synchronous control system, which continuously monitors the encoders arranged on the steel strands by a linear system, and adjusts the hydraulic parameters in each set of hydraulic lifting devices 9 to keep the lifting speed of the four steel strands consistent.

[0063] Further, in the step 4), after the rolling mill 5 is lifted to a predetermined height, the rolling mill 5 is transversely slid, and during the transverse sliding process, a cherry picker is used to assist in arranging the cable lines on the transverse sliding path.

[0064] Furthermore, in step 4), after the rolling mill 5 reaches the target installation position A, the four sets of hydraulic lifting devices 9 unload symmetrically in a diagonal direction.

[0065] The following embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. Unless otherwise specified, the methods used in the following embodiments are conventional methods.

[0066]

Example

[0067] In this embodiment, the method described in this invention is used to replace the existing heavy plate rolling mill on the rolling mill production line. The heavy plate rolling mill consists of rolls, roll bearings, frame, rail base, roll adjustment device, upper roll balancing device, and roll changing device. The frame height of the heavy plate rolling mill exceeds 15 meters. The specific installation process is as follows:

[0068] Step 1: Under production conditions, construct the pre-assembly pit 1 in a location outside the rolling mill production line that does not affect production (e.g., ...). Figure 1 As shown), offline assembly of rolling mill 5, completing the installation of components such as rolling mill base 51, frame 52, upper crossbeam 53, lower crossbeam 54, and hydraulic adjustment device (e.g. Figure 2a , Figure 2b (As shown).

[0069] In this embodiment, the pre-assembly pit 1 is 6 meters deep. The assembly of the rolling mill 5 is carried out in the pre-assembly pit 1, which can meet the height requirements for hoisting the frame 52, and at the same time does not affect the passage requirements of the factory crane.

[0070] The mill base support 6 is arranged in the pre-assembly pit 1 to place the mill base 51. The mill base 51 is hoisted and installed in place using a factory crane. The elevation, center line, levelness and parallelism of the mill base 51 are measured to ensure that the error is within the allowable range, so as to ensure the accuracy requirements when installing the frame 52 in the next process.

[0071] like Figure 2a , Figure 2b As shown, after the mill base 51 has passed installation and acceptance, the mill frame 52 is hoisted. Once in place, the mill frame 52 is directly installed on the mill base 51. After installation and adjustment, the connecting bolts between the mill base 51 and the mill frame 52 are initially tightened. Then, following a bottom-up sequence, the lower crossbeam 54 and upper crossbeam 53 are installed sequentially, ensuring that both ends of the upper crossbeam 53 and lower crossbeam 54 are close to the contact surfaces of the mill frame 52. The connecting bolts are then tightened. The hoisting structure 55 on the mill base 51 uses four symmetrically distributed lifting lugs at the four corners of the mill base 51, which are connected to the mill base 51 by bolts.

[0072] Step Two, as follows Figure 3a ,Figure 3b As shown, with the longitudinal centerline of the rolling mill 5 as the center, a lifting column 81, a lifting support frame, and a hydraulic lifting device 7 are set on the ground above the pre-assembly pit 1. In this embodiment, the hydraulic lifting device 7 is a cable-type hydraulic lifting device. The four lifting lugs on the rolling mill base 51 are connected to the anchors 72 at the bottom of the four sets of steel strands 71 ​​of the hydraulic lifting device 7 by pins. The steel strands 71 ​​correspond one-to-one with the lifting lugs and are set vertically, so that the lifting point coincides with the lifting path of the hydraulic lifting device 7.

[0073] like Figure 4 As shown, two parallel longitudinal sliding track beams 32 are set on the ground outside the pre-assembly pit 1 along the longitudinal sliding direction of the rolling mill 5, with a reserved lifting space between the two longitudinal sliding track beams 32. The rolling mill 5 is lifted vertically upward by the hydraulic lifting device 7. When the bottom surface of the rolling mill 5 exceeds the elevation of the longitudinal sliding track 31, the two longitudinal sliding track beams 32 are moved closer to the inside of the rolling mill 5.

[0074] Step 3: A longitudinal sliding track 31 is installed on the longitudinal sliding track beam 32, and the longitudinal sliding beam 33 moves along the groove on the longitudinal sliding track 31 to ensure the longitudinal sliding accuracy of the rolling mill 5.

[0075] A grid-shaped frame beam consisting of a transverse support beam 35 and a longitudinal support beam 36 is installed on the longitudinal sliding beam 33. A connecting beam is welded between the two longitudinal support beams 36 to form a stable support frame for supporting the rolling mill 5. After the longitudinal sliding device is installed, the hydraulic lifting device 7 lowers the rolling mill 5 as a whole and places it on the longitudinal support beam 36.

[0076] The rolling mill 5 is slid horizontally along the longitudinal sliding beam 33 to one side of the target installation position A, ensuring that the transverse centerlines of both are in the same vertical plane. A steel pad 34 is installed at the bottom of the longitudinal sliding track 31. The steel pad 34 is installed using the grouting pad method, and its elevation, centerline, and levelness all meet the installation requirements for pads of general mechanical equipment.

[0077] In this embodiment, the longitudinal sliding distance of the rolling mill 5 is approximately 100 meters. Two sets of longitudinal sliding hydraulic drive devices 38 are used. Specifically, each longitudinal sliding hydraulic drive device 38 is a push hydraulic cylinder, equipped with a hydraulic pump station and controller. After the longitudinal sliding device is installed, adjusted, and accepted, the longitudinal sliding hydraulic drive device 38 is activated to push the longitudinal sliding beam 33 and the entire rolling mill 5 along the longitudinal sliding track 31. Figure 5a , Figure 5b During the longitudinal sliding process, the stability of the mill 5 and the synchronization of the two sets of longitudinal sliding hydraulic drive devices 38 are monitored at all times. When the mill 5 reaches the end position of the longitudinal sliding, fine adjustments are made to ensure that the deviation between the transverse centerline of the mill 5 and the transverse centerline of the target installation position A is no more than 2mm.

[0078] Step four, as shown in Figure 6a 、 Figure 6b After the old rolling mill is removed, 6 sliding lifting columns 43, 2 transverse sliding track beams 42, 2 transverse sliding tracks 41, 2 transverse sliding beams 44 and 2 sets of transverse sliding hydraulic driving devices 47 are sequentially installed on the laying path outside the rolling mill foundation pit 2 and above the roll changing device foundation pit 10, and the two transverse sliding beams 44 are rigidly connected through connecting rods.

[0079] Two longitudinal lifting beams 45, two transverse lifting beams 46 and four sets of hydraulic lifting devices 9 are installed on the transverse sliding beams 44. In this embodiment, the hydraulic lifting device 9 is a steel cable type hydraulic lifting device. The steel wire rope in the hydraulic lifting device 9 is threaded in advance and the anchor device is installed, and the matching hydraulic pump station, hydraulic control system, oil pipe, power cable and control cable and the like are set. After installation, the anchor device and the four lifting lugs on the rolling mill base 51 are connected by a pin shaft, and the overall debugging of the transverse sliding hydraulic lifting device is carried out. The center line of the transverse sliding track 41 allows a deviation of 2mm, the track gauge allows a deviation of 2mm, and the track elevation allows a deviation of ±5mm.

[0080] After confirming that the anchor device of the hydraulic lifting device 9 is reliably connected with the lifting lug and the steel wire rope is perpendicular to the ground, the rolling mill 5 is started to be lifted. The trial lifting is carried out at the beginning of lifting, the lifting load is loaded in a step-by-step manner, and the overall balance of the rolling mill 5, the transverse sliding and the overall structure of the hydraulic lifting device 9 are monitored during the loading process. After confirming that there is no abnormal situation, the loading can continue.

[0081] The rolling mill 5 hovers 100mm upward after leaving the longitudinal support beam 36, and the support structure is checked and monitored during the hovering period. The linear system continuously monitors the encoder arranged on the steel wire rope through the synchronous control system, and controls the hydraulic pressure of each hydraulic lifting device 9 to ensure that each steel wire rope is lifted at the same speed. During the lifting process, the perpendicularity of the sliding lifting column 43 and the deflection of the transverse sliding beam 44 are mainly monitored, and the levelness of the rolling mill 5 is measured in at least two directions to ensure that the levelness of the rolling mill 5 is controlled within 0.5mm / m. When the load or height difference of each lifting point exceeds the tolerance, the lifting is immediately adjusted or stopped, and after the obstacle is found and removed, the lifting can be resumed. The overall lifting diagram of the rolling mill 5 is shown in Figure 5a 、 Figure 5b .

[0082] After the rolling mill 5 is lifted to the predetermined height (200 mm higher than the longitudinal support beam), the lifting is stopped, the transverse sliding beam 44 and the hydraulic lifting device 9 and the rolling mill 5 thereon are pushed by the transverse sliding hydraulic driving device 47 to move along the transverse sliding rail 41 synchronously, and the rolling mill 5 is slid to the target installation position. In the embodiment, the transverse sliding hydraulic driving device 47 is a pushing hydraulic cylinder. During the transverse sliding of the rolling mill 5, the cable line for sliding is arranged by the aid of the aerial platform truck to prevent scratching and damage.

[0083] As shown in Figure 7 , Figure 8 After the rolling mill 5 is slid to the target installation position A, the four hydraulic lifting devices 9 are controlled to operate synchronously to vertically lower the rolling mill 5 to the target installation position A.

[0084] Step five, after the rolling mill 5 is positioned, the position is fine-tuned, including adjusting the height and the center line of the rolling mill base 51, and after the adjustment is completed, the four hydraulic lifting devices 9 are symmetrically unloaded. After the unloading is completed, the installation of the rolling mill 5 is completed; finally, all the installation devices are removed, and the site is cleaned.

[0085] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A method for the offline sinking and overall sliding installation of a large-scale wide and thick plate rolling mill, characterized in that, Includes the following steps: 1) Construct a pre-assembly pit in an open area outside the target installation location of the rolling mill; perform overall assembly of the rolling mill in the pre-assembly pit; after assembly, the maximum height of the rolling mill shall be lower than the travel height of the overhead crane in the plant; a hoisting structure shall be installed on the base of the rolling mill. 2) A hydraulic lifting device is installed above the pre-assembly pit, which works in conjunction with the hoisting structure on the mill base to lift the mill from the pre-assembly pit to ground level; The hydraulic lifting device is mounted above the pre-assembly pit via a lifting support frame. The lifting support frame consists of lifting columns, main lifting beams, transverse lifting beams, and longitudinal lifting beams. Two lifting columns are installed on each side of the pre-assembly pit along the longitudinal sliding direction of the rolling mill, and two main lifting beams are installed on the two lifting columns on the same side. Two transverse lifting beams are arranged in parallel and span across the two main lifting beams, and two longitudinal lifting beams are arranged in parallel and span across the two transverse lifting beams. The transverse and longitudinal lifting beams form a grid-like frame structure around the rolling mill. Two sets of hydraulic lifting devices are installed on each longitudinal lifting beam. The hydraulic lifting devices are equipped with vertical steel strands, and the bottom end of the steel strands is equipped with anchors that connect with the hoisting structure on the rolling mill base. When the rolling mill is lifted, the four sets of hydraulic lifting devices operate synchronously. 3) A longitudinal sliding device is installed on the ground above the pre-assembly pit to move the lifted mill along a longitudinal sliding track parallel to the mill's rolling direction to the outside of the target installation position, and to align the mill's transverse centerline along the drive side-operation side direction with the transverse centerline of the target installation position. The longitudinal sliding device consists of longitudinal sliding track beams, longitudinal sliding tracks, longitudinal sliding beams, longitudinal sliding support frames, and a longitudinal sliding hydraulic drive device. There are two longitudinal sliding track beams, positioned on the ground outside the pre-assembly pit and inside the lifting column, along the longitudinal sliding direction of the rolling mill. Two longitudinal sliding tracks are correspondingly mounted on the two longitudinal sliding track beams. The longitudinal sliding tracks have grooves, and the lower parts of the two longitudinal sliding beams are embedded in the grooves on the corresponding longitudinal sliding tracks. The upper parts of the two longitudinal sliding beams are rigidly connected by connecting rods. A longitudinal sliding hydraulic drive device is installed on the longitudinal sliding track at one end of the pre-assembly pit. The longitudinal sliding beam can move along the corresponding slide groove under the drive of the longitudinal sliding hydraulic drive device. The longitudinal sliding support frame is composed of longitudinal support beams and transverse support beams. Two transverse support beams are arranged in parallel and span across two longitudinal sliding beams respectively. Two longitudinal support beams are arranged in parallel and span across two transverse support beams respectively. The transverse support beams and longitudinal support beams form a grid-shaped frame structure. The two longitudinal support beams are also connected by a connecting beam. 4) A lateral sliding and hydraulic lifting device is installed along the lateral centerline of the target installation position to move the mill along the lateral sliding track to above the target installation position and lower the mill into the mill pit where the target installation position is located; The lateral sliding and hydraulic lifting device consists of sliding and lifting columns, a lateral sliding mechanism, a lifting support frame, and a hydraulic lifting device. The lateral sliding mechanism comprises lateral sliding track beams, lateral sliding tracks, lateral sliding beams, and a lateral sliding hydraulic drive device. There are two lateral sliding track beams, arranged along the lateral sliding direction of the rolling mill. These beams are supported above the ground on both sides of the rolling mill pit by multiple sliding and lifting columns. Two lateral sliding tracks are correspondingly mounted on two lateral sliding track beams. The lateral sliding tracks have grooves, and the lower parts of the two lateral sliding beams are embedded in the grooves on the corresponding lateral sliding tracks. The upper parts of the two lateral sliding beams are rigidly connected by connecting rods. The device is located away from the rolling mill pit. A transverse sliding hydraulic drive device is installed on the transverse sliding track at one end, and the transverse sliding beam can move along the corresponding slide groove under the drive of the transverse sliding hydraulic drive device; the lifting support frame consists of longitudinal lifting beams and transverse lifting beams. Two longitudinal lifting beams are set in parallel and span across two transverse sliding beams respectively, and two transverse lifting beams are set in parallel and span across two longitudinal lifting beams respectively. The longitudinal lifting beams and transverse lifting beams form a grid-shaped frame structure; each transverse lifting beam is equipped with two sets of hydraulic lifting devices. The hydraulic lifting devices are equipped with vertical steel strands, and the bottom end of the steel strands is equipped with anchors to connect with the hoisting structure on the mill base; when the mill is lifted, the four sets of hydraulic lifting devices operate synchronously; 5) Install the rolling mill in place.

2. The installation method for offline sinking assembly and overall sliding of a large-scale wide and thick plate rolling mill according to claim 1, characterized in that, In step 1), a mill base support is set in the pre-assembly pit to support the mill base; the technical parameters related to the mill installation on the mill base are measured, and after the parameters are adjusted to be qualified, the other parts of the mill are assembled on the mill base using the overhead crane in the plant, and the positions of each part are adjusted according to the mill installation requirements, so as to finally form the assembled mill as a whole.

3. The installation method for offline sinking assembly and overall sliding of a large-scale wide and thick plate rolling mill according to claim 1, characterized in that, In step 3), after the mill is lifted above the longitudinal sliding beam, the longitudinal sliding support frame is placed on the longitudinal sliding beam. Then, the mill is lowered by the hydraulic lifting device. The mill base cooperates with the longitudinal support beam to support the entire mill by the longitudinal sliding support frame. After the mill falls onto the longitudinal sliding support frame, the anchor at the bottom of the steel strand of the hydraulic lifting device is separated from the hoisting structure on the mill base, in preparation for the longitudinal sliding of the mill.

4. The installation method for offline sinking assembly and overall sliding of a large-scale wide and thick plate rolling mill according to claim 1, characterized in that, In step 3), a steel pad is installed under the longitudinal sliding track. The steel pad is installed using the grouting pad method to ensure the horizontality of the longitudinal sliding track. Two sets of longitudinal sliding hydraulic drive devices are installed, one on each of the two longitudinal sliding tracks. When the rolling mill moves along the longitudinal sliding track, the two sets of longitudinal sliding hydraulic drive devices operate synchronously.

5. The installation method for offline sinking assembly and overall sliding of a large-scale wide and thick plate rolling mill according to claim 1, characterized in that, In step 4), the mill is raised above the longitudinal sliding track by a hydraulic lifting device, and the mill is separated from the longitudinal sliding support frame. The synchronous operation of the hydraulic lifting device is achieved by a synchronous control system, which continuously monitors the encoder on the steel strand by a linear system and adjusts the hydraulic parameters in each set of hydraulic lifting devices to keep the lifting speed of the four steel strands consistent.

6. The installation method for offline sinking assembly and overall sliding of a large-scale wide and thick plate rolling mill according to claim 1, characterized in that, In step 4), after the mill is raised to the predetermined height, it slides laterally. During the lateral sliding process, a ladder truck is used to assist in organizing the cable lines on the lateral sliding path.

7. The installation method for offline sinking assembly and overall sliding of a large-scale wide and thick plate rolling mill according to claim 1, characterized in that, In step 4), after the mill reaches the target installation position, the four sets of hydraulic lifting devices unload symmetrically in a diagonal direction.

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