A method for offline assembly of a large rolling mill stand

Abstract

The present application relates to a kind of large mill stand offline assembly method, pre-assembly pit is opened on the ground outside mill installation site, mill base is installed in pre-assembly pit;Hydraulic lifting sliding device is arranged above pre-assembly pit, ground horizontal sliding device is arranged on the ground outside end of hydraulic lifting sliding device;Drive side housing, operating side housing and mill beam are respectively hoisted to mill base, mill stand is assembled.This application is suitable for the installation of large mill stand, which height exceeds the lifting capacity of factory crane and hinders the passage of factory crane, a pre-assembly pit is opened in the open area outside the rolling production line to offline assemble the mill, through ground horizontal sliding device, hydraulic lifting sliding device, rotating cross beam lifting appliance and workshop crane, the large mill stand is transported horizontally, turned horizontally, turned over in the air and erected vertically, and then installed on the mill base in the pre-assembly pit, with reasonable process design and high construction efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of large equipment installation, in particular to a large rolling mill stand offline assembly method. BACKGROUND

[0002] Modern large rolling mill is the core equipment of the rolling process line in the rolling mill, which directly determines the product and quality of the rolled piece. With the rapid development of rolling technology, the size specification of the rolling mill is increasing, and the installation quality requirement is increasing.

[0003] At present, the hoisting technology for large rolling mill mainly includes: "foundation reservation method" hoisting technology, "corbel rotation method" hoisting technology, "special lifting appliance" hoisting technology, "horizontal sliding vertical hydraulic jacking super large rolling mill" technology, and vertical roll mill hoisting technology. Different hoisting technologies are used to solve different problems, such as insufficient lifting capacity of the crane in the production workshop, insufficient lifting height, and limited installation environment, etc. Each method is suitable for different range, and the above methods all belong to online installation method. SUMMARY

[0004] The present application provides a large rolling mill stand offline assembly method, which is suitable for the installation of large rolling mill stand whose height exceeds the lifting capacity of the factory crane and hinders the passage of the factory crane. A pre-assembly pit is opened in an open area outside the rolling production line for offline assembly of the rolling mill. Through the ground horizontal sliding device, the hydraulic lifting sliding device, the rotating cross beam lifting appliance, and the workshop crane, the large rolling mill stand is transported horizontally, turned horizontally, turned over in the air, and vertically erected, and then installed on the rolling mill base in the pre-assembly pit. The process design is reasonable, and the construction efficiency is high.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] A large rolling mill stand offline assembly method, comprising the following steps:

[0007] 1) A pre-assembly pit is opened on the ground outside the rolling mill installation position, and a rolling mill base is installed in the pre-assembly pit; a hydraulic lifting sliding device is arranged above the pre-assembly pit, and a ground horizontal sliding device is arranged on the ground outside the hydraulic lifting sliding device; the center line of the ground horizontal sliding device, the center line of the hydraulic lifting sliding device, and the center line of the rolling mill base are coaxial;

[0008] 2) Hoist the drive side stand to the horizontal sliding device, and slide the drive side stand to the lower side of the hydraulic lifting sliding device through the ground horizontal sliding device;

[0009] 3) The hydraulic lifting sliding device is provided with multiple groups of hydraulic lifting devices, and the multiple groups of hydraulic lifting devices are connected to the transmission side frame through the rotating cross beam lifting appliance. The transmission side frame is first lifted horizontally and slid to one side of the rolling mill base, and then rotated horizontally by 90°, so that the center line of the transmission side frame is perpendicular to the center line of the rolling mill base;

[0010] 4) The rotating cross beam lifting appliance is separated from the transmission side frame. A lifting lug is arranged at one end of the transmission side frame close to the top and connected to the multiple groups of hydraulic lifting devices. One end of the transmission side frame close to the bottom is connected to the hook of the workshop travelling crane through a steel wire rope. The transmission side frame is flipped from the horizontal state to the vertical state in the air through the hydraulic lifting device and the cooperation of the workshop travelling crane. Finally, the transmission side frame is installed on the rolling mill base;

[0011] 5) The operation side frame is installed on the rolling mill base in the same way as steps 2) to 4);

[0012] 6) The rolling mill beam is installed, so that the rolling mill base, the transmission side frame, the operation side frame and the rolling mill beam form an integral whole, and the rolling mill frame is assembled.

[0013] The rolling mill base support pier is arranged in the pre-assembly pit, and the rolling mill base is supported by the rolling mill base support pier.

[0014] The ground horizontal sliding device is composed of sliding rail beams, horizontal sliding beams, frame support beams and horizontal hydraulic jacking devices. Two sliding rail beams are arranged in parallel, and the top of the sliding rail beam is provided with a slide. Two groups of horizontal sliding beams are arranged on the two sliding rail beams correspondingly, and the horizontal sliding beams can move along the slide under the driving of the horizontal hydraulic jacking devices. Two frame support beams are arranged perpendicular to the horizontal sliding beams, and the two ends of the frame support beam span the top of the two horizontal sliding beams in the same group. The frame support beam supports the transmission side frame / operation side frame.

[0015] The hydraulic lifting sliding device is composed of columns, a main sliding device, a transverse sliding device, a support device and a hydraulic lifting device; the main sliding device is composed of main sliding track beams, a main sliding beam and a main sliding hydraulic thrust device; the transverse sliding device is composed of transverse sliding track beams, a transverse sliding beam and a transverse sliding hydraulic thrust device; the support device is composed of longitudinal support beams and transverse support beams; the two main sliding track beams in the main sliding device are arranged in parallel, and the bottom of each main sliding track beam is supported by a plurality of columns; the top of the main sliding track beam is provided with a main sliding channel, and the main sliding beam can move along the main sliding channel under the driving of the main sliding hydraulic thrust device; the transverse sliding device is composed of two groups, and the two transverse sliding track beams in each group are arranged in parallel and cross the top of the main sliding beam; the top of the transverse sliding track beam is provided with a transverse sliding channel, and the transverse sliding beam can move along the transverse sliding channel under the driving of the transverse sliding thrust device; the support device is composed of two groups and is arranged in one-to-one correspondence with the transverse sliding device; in each group of the support device, the two longitudinal support beams and the two transverse support beams are arranged in a cross shape on the top of the corresponding transverse sliding beam, and the middle part of the two transverse support beams is provided with a group of hydraulic lifting devices; the four groups of hydraulic lifting devices are connected with the rotating cross beam hanger through the bottom of the steel hinge wire, and the bottom of the steel hinge wire in the other two groups of hydraulic lifting devices is provided with a rigging.

[0016] The rotating cross beam hanger is composed of an upper cross beam, a lower cross beam, a vertical shaft and a rotating mechanism; the upper cross beam and the lower cross beam are arranged horizontally, the upper cross beam is fixedly connected with the vertical shaft, and the lower cross beam is connected with the vertical shaft through the rotating mechanism; under the driving of the rotating mechanism, the lower cross beam can rotate horizontally around the vertical shaft.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] 1) The large-scale rolling mill in the present application is a large-scale wide and thick plate rolling mill (referred to as a rolling mill), and the height of the rack is generally more than 15 meters, so the lifting height of the plant crane cannot meet the lifting requirements of the rack, and the rack will also interfere with the normal operation of the plant crane when the rack is assembled on the ground; the present application adopts the method of opening a pre-assembly pit, which reduces the relative height of the rolling mill during assembly in the plant, and solves the problems of limited assembly height and interference with the operation of the plant crane during assembly;

[0019] 2) The present application adopts the method of offline sinking and pre-assembling the rolling mill, and a pre-assembly pit is opened in an open area outside the rolling production line, and the assembly of the main body of the rolling mill (except the work roll and the support roll) is carried out in the pre-assembly pit; the assembly of the rolling mill does not affect the normal production, and the assembled rolling mill can be installed to the target installation position of the rolling mill through integral sliding, so the production suspension and reconstruction period of the rolling line can be greatly shortened;

[0020] 3) Through the ground horizontal sliding device, hydraulic lifting sliding device, rotating cross beam lifting appliance and workshop travelling crane, horizontal sliding, horizontal steering, vertical overturning and other operations of the rolling mill stand are realized, the whole construction process does not affect normal production, and the adaptability is strong, safe and reliable;

[0021] 4) The hydraulic lifting sliding device integrates the main sliding device, the transverse sliding device and the hydraulic lifting device, a plurality of vertical columns are adopted at the bottom, the vertical columns are symmetrically arranged at both sides of the pre-assembly pit and the rolling mill foundation pit, a plurality of hydraulic lifting devices can be arranged according to the requirement, the overall structure is stable, the lifting capacity is strong, the installation requirement of various types of large wide-thick plate rolling mill stands can be met, the lifting height is reduced, and the safety and reliability of the installation of the large wide-thick plate rolling mill is improved;

[0022] 5) The pre-assembly pit can be arranged in a wide area away from the target installation position of the rolling mill, the safety of the working environment is higher, the influence on the rolling line production is small, the pre-assembly pit can meet the space requirement of the horizontal steering and vertical overturning of the rolling mill stand, the installation height of the rolling mill is greatly reduced, the structural stability is increased, the high-altitude operation is reduced, and the construction safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of the large rolling mill stand.

[0024] Figure 2 is a schematic view of the installation process of the transmission side stand Figure 1 (Ground horizontal sliding device structure schematic view).

[0025] Figure 3a is a schematic view of the installation process of the transmission side stand Figure 2 (Hydraulic lifting sliding device structure front view).

[0026] Figure 3b is Figure 3a the left view.

[0027] Figure 3c is Figure 3a the top view (the hydraulic lifting sliding device is not shown, and the position of the transmission side stand is mainly shown).

[0028] Figure 4 is a schematic view of the installation process of the transmission side stand.

[0029] Figure 5a is a schematic view of the installation process of the transmission side stand Figure 4 .

[0030] Figure 5b is Figure 5a the left view.

[0031] Figure 5cyes Figure 5a A top view of the transmission side frame (not showing the hydraulic lifting and sliding device).

[0032] Figure 6 This is the fifth schematic diagram of the transmission side frame installation process of the present invention.

[0033] Figure 7a This is a schematic diagram of the installation process of the transmission side frame of the present invention Figure 6 .

[0034] Figure 7b yes Figure 7a Left view of .

[0035] Figure 7c yes Figure 7a A top view of the transmission side frame (not showing the hydraulic lifting and sliding device).

[0036] Figure 8a Schematic diagram seven of the transmission side frame installation process of the present invention.

[0037] Figure 8b yes Figure 8a Left view of .

[0038] Figure 8c yes Figure 8a A top view of the transmission side frame (not showing the hydraulic lifting and sliding device).

[0039] Figure 9 This is a schematic diagram of the installation process of the operating side frame of the present invention. Figure 1 .

[0040] Figure 10 This is a schematic diagram of the installation process of the operating side frame of the present invention. Figure 2 .

[0041] Figure 11 Schematic diagram three of the installation process of the operating side frame of the present invention.

[0042] Figure 12 This is a schematic diagram of the installation process of the operating side frame of the present invention. Figure 4 .

[0043] Figure 13 Schematic diagram 5 of the installation process of the operating side frame of the present invention.

[0044] Figure 14 It is a schematic diagram of the installation of the rolling mill crossbeam of the present invention.

[0045] In the figure: 11. Rolling mill base 12. Drive side housing 13. Operating side housing 14. Rolling mill beam 21. Sliding rail beam 22. Slide 23. Horizontal sliding beam 24. Horizontal sliding pusher 25. Housing support beam 301. Column 302. Main sliding rail beam 303. Main sliding beam 304. Main sliding pusher 305. Transverse sliding rail beam 306. Transverse sliding beam 307. Longitudinal support beam 308. Transverse support beam 309. Hydraulic lifting device 310. Rigging 311. Transverse sliding pusher 4. Rotating cross-beam spreader 5. Pre-assembled pit 6. Lifting lug 7. Crane hook of workshop crane 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 terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to 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 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, unless otherwise specified, the meaning of "a plurality of" is two or more.

[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 through specific circumstances.

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

[0050] The large rolling mill housing offline assembly method described in the present application comprises the following steps:

[0051] 1) Open a pre-assembly pit 5 on the ground outside the mill installation site, install the mill base 11 (as shown in Figure 3c ) in the pre-assembly pit 5; set a hydraulic lifting and sliding device (as shown in Figure 3a , Figure 3b ) above the pre-assembly pit 5, and set a ground horizontal sliding device (as shown in Figure 2 ) on the ground outside the end of the hydraulic lifting and sliding device; the center line of the ground horizontal sliding device, the center line of the hydraulic lifting and sliding device, and the center line of the mill base 11 are coaxial;

[0052] 2) Hoist the transmission side frame 12 to the horizontal sliding device, and slide the transmission side frame 12 to the lower side of the hydraulic lifting and sliding device (as shown in Figures 3a-3c ) through the ground horizontal sliding device;

[0053] 3) The hydraulic lifting and sliding device is provided with a plurality of hydraulic lifting devices 309, and the transmission side frame 12 is connected to the plurality of hydraulic lifting devices 309 through a rotating cross beam lifting tool 4, the transmission side frame 12 is first hoisted horizontally and slid to one side of the mill base 11, and then rotated horizontally by 90°, so that the center line of the transmission side frame 12 is perpendicular to the center line of the mill base 11 (as shown in Figure 4 , Figures 5a-5c );

[0054] 4) As shown in Figure 6 , separate the rotating cross beam lifting tool 4 from the transmission side frame 12, connect the lifting lug 6 at the end of the transmission side frame 12 close to the top to the plurality of hydraulic lifting devices 309, and connect the hook 7 of the workshop travelling crane through a steel wire rope at the end of the transmission side frame 12 close to the bottom; hoist through the hydraulic lifting device 309, and cooperate with the workshop travelling crane to overturn the transmission side frame 12 from the horizontal state to the vertical state in the air (as shown in Figures 7a-7c ); and finally install the transmission side frame 12 to the mill base 11 (as shown in Figures 8a-8c );

[0055] 5) Install the operation side frame 13 to the mill base 11 in the same way as steps 2) to 4) (as shown in Figures 9-13 );

[0056] 6) Install the mill beam 14 (as shown in Figure 14 ), so that the mill base 11, the transmission side frame 12, the operation side frame 13, and the mill beam 14 form an integral whole, and the mill frame is assembled.

[0057] The pre-assembly pit 5 is provided with a mill base support pier, and the mill base 11 is supported by the mill base support pier.

[0058] The ground horizontal sliding device is composed of sliding rail beams 21, horizontal sliding beams 23, rack support beams 25 and horizontal hydraulic pushing devices 24; two sliding rail beams 21 are arranged in parallel, the top of the sliding rail beam 21 is provided with a sliding channel 22; two groups of horizontal sliding beams 23 are arranged on the two sliding rail beams 21 correspondingly, the horizontal sliding beam 23 can move along the sliding channel 22 under the driving of the horizontal hydraulic pushing device 24; two rack support beams 25 are arranged perpendicularly to the horizontal sliding beam 23, the two ends of the rack support beam 25 span on the top of the two horizontal sliding beams 23 in the same group, and the rack support beam 25 supports the transmission side rack 12 / operation side rack 13.

[0059] The hydraulic lifting sliding device is composed of columns 301, main sliding devices, transverse sliding devices, support devices and hydraulic lifting devices 309; the main sliding device is composed of main sliding rail beams 302, main sliding beams 303 and main sliding hydraulic pushing devices 304, the transverse sliding device is composed of transverse sliding rail beams 305, transverse sliding beams 306 and transverse sliding hydraulic pushing devices 311; the support device is composed of longitudinal support beams 307 and transverse support beams 308; two main sliding rail beams 302 in the main sliding device are arranged in parallel, the bottom of each main sliding rail beam 302 is supported by a plurality of columns 301 respectively; the top of the main sliding rail beam 302 is provided with a main sliding channel, and the main sliding beam 303 can move along the main sliding channel under the driving of the main sliding hydraulic pushing device 304; the transverse sliding device is two groups, two transverse sliding rail beams 305 in each group of the transverse sliding device are arranged in parallel and span on the top of the main sliding beam 303, the top of the transverse sliding rail beam 305 is provided with a transverse sliding channel, and the transverse sliding beam 306 can move along the transverse sliding channel under the driving of the transverse sliding pushing device 311; the support device is two groups and is arranged one by one corresponding to the transverse sliding device; in each group of the support device, two longitudinal support beams 307 and two transverse support beams 308 are arranged in a cross shape on the top of the corresponding transverse sliding beam 306, and the middle part of the two transverse support beams 308 is respectively provided with a group of hydraulic lifting devices 309; the hydraulic lifting devices 309 are four groups, the bottom end of the steel hinge wire in two groups of the hydraulic lifting devices 309 is connected with the rotating cross beam hanger 4, and the bottom end of the steel hinge wire in the other two groups of the hydraulic lifting devices 309 is respectively provided with a rigging 310.

[0060] The rotating cross beam hanger 4 is composed of an upper cross beam, a lower cross beam, a vertical shaft and a rotating mechanism; the upper cross beam and the lower cross beam are arranged horizontally, the upper cross beam is fixedly connected with the vertical shaft, and the lower cross beam is connected with the vertical shaft through the rotating mechanism; under the driving of the rotating mechanism, the lower cross beam can rotate horizontally around the vertical shaft.

[0061] The principle of the offline assembly method of the large rolling mill rack is that a pre-assembly pit 5 is constructed outside the target installation position of the large rolling mill, and a rolling mill base 11 is installed in the pre-assembly pit 5; a hydraulic lifting and sliding device is arranged above the pre-assembly pit 5, and a ground horizontal sliding device is arranged, and the driving side rack 12 and the operating side rack 13 of the rolling mill are hoisted respectively, are first horizontally slid to below the hydraulic lifting and sliding device, and then the horizontal turning and vertical overturning are completed by using the hydraulic lifting and sliding device, and finally are installed on the rolling mill base 11.

[0062] The pre-assembly pit 5 is arranged at a position not affecting the production of the rolling line, and a rolling mill base supporting pier is arranged in the pre-assembly pit 5, and the rolling mill base 11 is installed on the rolling mill base supporting pier.

[0063] The center line of the rolling mill base in the pre-assembly pit 5 is taken as an installation center line, 2 rows of columns 301 are symmetrically arranged above the pre-assembly pit 5 on both sides, and then the hydraulic lifting and sliding device and the ground horizontal sliding device are installed; the hydraulic lifting and sliding device is provided with a main sliding device and a transverse sliding device, the main sliding device can move in the parallel direction of the installation center line, and the moving direction of the transverse sliding device is perpendicular to the main sliding device; the hydraulic lifting device is arranged on the transverse sliding device and can realize longitudinal and transverse plane movement above the pre-assembly pit; the 2 groups of transverse sliding devices can move independently and do not affect each other.

[0064] The ground horizontal sliding device is used for sliding the rolling mill rack to below the hydraulic lifting and sliding device.

[0065] The hoisting of the driving side rack 12 and the operating side rack 13 of the large rolling mill is sequentially completed, including horizontal transfer, horizontal turning and vertical overturning, wherein the horizontal turning is completed by cooperation of the hydraulic lifting device 309 and the rotating cross beam lifting appliance 4, and the vertical overturning is completed by cooperation of the hydraulic lifting device 309 and the workshop overhead crane.

[0066] The following examples are implemented on the premise of the technical scheme of the present application, and detailed implementation modes and specific operation processes are given, but the protection scope of the present application is not limited to the following examples.

[0067]

Example

[0068] In this embodiment, the rack of the large wide-thick plate rolling mill is pre-assembled by using the offline assembly method of the large rolling mill rack according to the present application, as shown in FIG. 1, the rack of the large wide-thick plate rolling mill is composed of a rolling mill base 11, a driving side rack 12, an operating side rack 13 and a rolling mill cross beam 14, the height exceeds 15 meters, and the weight exceeds 500 tons, and the specific installation process is as follows: Figure 1

[0069] ​Step one: Construct the pre-assembly pit 5 without affecting the production, and install the rolling mill base 11 into the pre-assembly pit 5. The hydraulic lifting and sliding device and the ground horizontal sliding device are arranged outside the pre-assembly pit 5, and the sliding rail beam 21 in the ground horizontal sliding device is laid from the rolling mill rack unloading position to the lower part of the hydraulic lifting and sliding device.

[0070] Step two: Construct the driving side rack 12 first; hoist the driving side rack 12 to the ground horizontal sliding device, and transport the driving side rack 12 to the lower part of the hydraulic lifting and sliding device through the horizontal sliding.

[0071] Step three: The steel wire of the 2 groups of hydraulic lifting devices 309 in the hydraulic lifting and sliding device is connected to the rotating cross beam hoist 4, the lower cross beam of the rotating cross beam hoist 4 is connected to the driving side rack 12 through the steel wire, the driving side rack 12 is horizontally turned through the rotation of the lower cross beam driven by the rotating mechanism.

[0072] Step four: After the horizontal turning of the driving side rack 12 is completed, the connection between the rotating cross beam hoist 4 and the driving side rack 12 is released, the cable fittings 310 at the bottom of the steel wire of the 2 groups of hydraulic lifting devices 309 are connected to the lifting lugs 6 installed on the upper part of the driving side rack 12, and the driving side rack 12 is turned over from the horizontal position to the vertical position through the cooperation of the workshop crane or the cooperation of the 2 groups of hydraulic lifting devices 309 after the rotating cross beam hoist 4 is removed (the hook 7 of the workshop crane or the cable fittings 310 of the hydraulic lifting device 309 is connected to the bottom of the driving side rack 12 through the steel wire); then the driving side rack 12 is moved above the rolling mill base 11, and finally installed on the rolling mill base 11.

[0073] Step five: Repeat steps two to four, and complete the horizontal sliding, horizontal turning, vertical turning and installation of the operating side rack 13 by using the same method.

[0074] Step six: Install the rolling mill beam 14, and complete the pre-assembly of the entire rolling mill rack.

[0075] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical solution 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 large-scale rolling mill stand offline assembly method, characterized in that: The steps include: 1) A pre-assembly pit is opened on the ground outside the rolling mill installation position, and the rolling mill base is installed in the pre-assembly pit; a hydraulic lifting sliding device is installed above the pre-assembly pit, and a ground horizontal sliding device is installed on the ground outside the hydraulic lifting sliding device; the center line of the ground horizontal sliding device and the center line of the hydraulic lifting sliding device are coaxial with the center line of the rolling mill base; The hydraulic lifting sliding device is composed of a column, a main sliding device, a transverse sliding device, a support device and a hydraulic lifting device; the main sliding device is composed of a main sliding track beam, a main sliding beam and a main sliding hydraulic jacking device, and the transverse sliding device is composed of a transverse sliding track beam, a transverse sliding beam and a transverse sliding hydraulic jacking device; the support device is composed of a longitudinal support beam and a transverse support beam; the two main sliding track beams in the main sliding device are arranged in parallel, and the bottom of each main sliding track beam is supported by several columns respectively; the main sliding track beam is provided with a main slide at the top, and the main sliding beam can move along the main slide under the drive of the main sliding hydraulic jacking device; the transverse sliding device is composed of two groups, and each group of transverse sliding The device has two parallel transverse sliding track beams that span the top of the main sliding beam. A transverse slide is provided on the top of the transverse sliding track beam, and the transverse sliding beam can move along the transverse slide driven by the transverse sliding pushing device. There are two groups of support devices, which are arranged one-to-one with the transverse sliding devices. In each group of support devices, two longitudinal support beams and two transverse support beams are staggered in a well-shaped pattern on the top of the corresponding transverse sliding beams, and a group of hydraulic lifting devices is respectively provided in the middle of the two transverse support beams. There are four groups of hydraulic lifting devices in total, of which the bottom ends of the steel hinges in two groups of hydraulic lifting devices are connected to the rotating cross beam hanger, and the bottom ends of the steel hinges in the other two groups of hydraulic lifting devices are respectively provided with rigging. 2) Hoist the transmission side frame onto the horizontal sliding device, and slide the transmission side frame to the bottom of the hydraulic lifting sliding device through the ground horizontal sliding device; 3) Hydraulic lifting and sliding device: Multiple sets of hydraulic lifting devices are installed. Several sets of hydraulic lifting devices are connected to the transmission side frame through rotating cross beam slings. The transmission side frame is first lifted horizontally, slid to the side of the rolling mill base, and then rotated horizontally 90 degrees so that the center line of the transmission side frame is perpendicular to the center line of the rolling mill base; 4) Separate the rotating cross-beam hoist from the transmission side frame, install a lifting lug at the top end of the transmission side frame and connect it to several hydraulic lifting devices, and connect the bottom end of the transmission side frame to the hook of the workshop crane via a wire rope; lift it with the hydraulic lifting device, and with the cooperation of the workshop crane, flip the transmission side frame from a horizontal state to a vertical state in the air; finally, install the transmission side frame on the rolling mill base; 5) Install the operating side frame onto the rolling mill base in the same manner as steps 2) to 4); 6) Install the mill crossbeam so that the mill base, transmission side frame, operation side frame and mill crossbeam form a whole, and the mill frame is assembled.

2. A large-scale rolling mill stand offline assembly method according to claim 1, characterized in that: The pre-assembly pit is provided with a rolling mill base buttress, and the rolling mill base is supported by the rolling mill base buttress.

3. The offline assembly method for a large rolling mill frame according to claim 1, characterized in that: The ground horizontal sliding device is composed of a sliding track beam, a horizontal sliding beam, a frame support beam and a horizontal hydraulic jacking device; the two sliding track beams are arranged in parallel, and a slide is provided on the top of the sliding track beam; two groups of horizontal sliding beams are correspondingly arranged on the two sliding track beams, and the horizontal sliding beams can move along the slide under the drive of the horizontal hydraulic jacking device; the two frame support beams are arranged perpendicular to the horizontal sliding beams, and the two ends of the frame support beam span the top of the two horizontal sliding beams in the same group, and the frame support beam supports the transmission side frame / operation side frame.

4. The offline assembly method for a large rolling mill frame according to claim 1, characterized in that: The rotating cross beam sling consists of an upper cross beam, a lower cross beam, a vertical shaft and a rotating mechanism; the upper cross beam and the lower cross beam are both arranged horizontally, the upper cross beam is fixedly connected to the vertical shaft, and the lower cross beam is connected to the vertical shaft through a rotating mechanism; under the drive of the rotating mechanism, the lower cross beam can rotate horizontally around the vertical shaft.

Images