Roll bending cylinder replacing device for hot continuous rolling production line

Abstract

The utility model discloses a roll bending cylinder replacing device for a hot continuous rolling production line, which is applied to the field of hot continuous rolling production lines and comprises a support frame, a hanger plate and a connecting plate, the hanger plate is mounted on a rolling mill main frame, and the connecting plate is fixedly arranged on the hanger plate; one end of the cross beam is mounted on the support frame, and the other end of the cross beam is mounted on the connecting plate; the first rail trolley and the second rail trolley are both movably arranged on the cross beam and can slide in the extending direction of the cross beam; the first hoisting component is mounted on the first rail trolley and is used for hoisting the roll bending cylinder; the second hoisting component is mounted on the second rail trolley and is used for leveling the roll bending cylinder; and the driving part is alternatively arranged on the first rail trolley or the second rail trolley. According to the roll bending cylinder replacing device, the whole roll bending cylinder replacing process is more reasonable, the operation difficulty is effectively reduced, and the overhauling quality is guaranteed; the safety risk caused by replacing the bending roller cylinder by hoisting the carrying pole beam can be effectively eliminated, and the accident potential is eliminated.

Description

Technical Field

[0001] This utility model relates to the field of hot continuous rolling production lines, and in particular to a bending roll cylinder replacement device for hot continuous rolling production lines. Background Technology

[0002] On a wide strip hot continuous rolling production line, the finishing roll bending cylinder, also known as the finishing roll hydraulic cylinder, is installed inside the mill stand on the drive side. It is an effective device for controlling the strip shape, and mill shape control has gradually become one of the core technologies in actual production. The finishing mill of wide strip hot continuous rolling uses a bending roll hydraulic control system to change the effective crown of the rolls, thereby achieving the goal of controlling the strip shape and ensuring product quality.

[0003] When the bending roll hydraulic cylinder needs maintenance or reaches the end of its service life, it needs to be replaced. In related technologies, during the replacement of the bending roll hydraulic cylinder, the connecting shaft and oil tank of the finishing mill need to be removed in advance. This is labor-intensive and extends the downtime. The removal of the old bending roll hydraulic cylinder requires the use of a crane to attach two steel wire ropes and lift a 5.5m long spreader beam. One end of the spreader beam is equipped with a 5t chain hoist and a 3t chain hoist to attach the old bending roll hydraulic cylinder to the lifting point. The other end of the spreader beam is equipped with the new bending roll hydraulic cylinder as a counterweight using the same method.

[0004] However, in the relevant technologies, during the dismantling and hoisting process of the old bending roller hydraulic cylinders, the spreader beam is not reliably fixed, which can easily cause the bending roller hydraulic cylinders at both ends of the spreader beam to swing irregularly, posing a risk to the personal safety of the surrounding workers; in addition, the waiting time for the crane is wasted, the maintenance efficiency is low, the downtime of the production line is restricted, and the production efficiency is affected.

[0005] Therefore, how to effectively improve the replacement efficiency of bending roller cylinders and reduce safety risks is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a bending roll cylinder replacement device for a hot continuous rolling production line, which reduces safety risks, eliminates potential accidents, and ensures personal safety.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A bending roll cylinder changing device for a hot continuous rolling production line includes:

[0009] The support frame is mounted on the anchor bolts on the load side of the gear base;

[0010] A hanging plate and a connecting plate, wherein the hanging plate is installed on the main frame of the rolling mill, and the connecting plate is fixed to the hanging plate;

[0011] At least one crossbeam, one end of which is mounted on the support frame and the other end of which is mounted on the connecting plate;

[0012] The first track trolley and the second track trolley are both movably mounted on the crossbeam and can slide along the extension direction of the crossbeam;

[0013] The first lifting component is installed on the first track trolley and is used to lift the bending roller cylinder;

[0014] The second lifting component is installed on the second track trolley and is used to level the bending roller cylinder;

[0015] A drive component is optionally installed on either the first or the second track trolley, for pulling the bending roller cylinder out or in along the extension direction of the crossbeam;

[0016] Furthermore, when the bending roller cylinder is disassembled, the driving component pulls the second track trolley toward the first track trolley, and the second track trolley drives the first track trolley to move synchronously to the disassembly position; when the bending roller cylinder is installed, the driving component pulls the second track trolley toward the second track trolley, and the first track trolley drives the second track trolley to move synchronously to the installation position.

[0017] On the other hand, the support frame includes a strip plate, a short beam, and at least two support columns. The bottom of the support column is mounted on the anchor bolts of the gear base, and the top of the support column is fixedly connected to the strip plate. The short beam is connected to the strip plate by fasteners, and the crossbeam is mounted on the short beam.

[0018] On the other hand, a lifting ring is provided on the end face of the crossbeam away from the support frame; the driving component includes a driving hook and a driving chain, the driving hook is installed on the driving chain, and the driving hook is selectively hung on the first track trolley or the second track trolley;

[0019] When the bending roller cylinder is disassembled, the drive hook is hung on the second track trolley, the fixed end of the drive chain is hung on the lifting point of the gear base, and the moving end of the drive chain is pulled. The drive hook pulls the second track trolley toward the first track trolley and drives the first track trolley to move synchronously to the disassembly position.

[0020] When the bending roller cylinder is installed, the drive hook is hung on the first track trolley, and the fixed end of the drive chain is hung on the lifting ring of the crossbeam. Pulling the movable end of the drive chain, the hook of the drive component pulls the first track trolley toward the second track trolley, and drives the second track trolley to move synchronously to the installation position.

[0021] On the other hand, the support frame is a portal frame, the support column is a steel pipe, the strip plate is a steel plate, and several third assembly holes are provided at the four corners of the strip plate. The short beam is an H-beam, and several fourth assembly holes corresponding to the third assembly holes are provided at both ends of the short beam. The strip plate is welded and fixed to the top of the support column, and the short beam is connected and fixed to the strip plate by fasteners.

[0022] On the other hand, the lower side of the crossbeam is provided with a sliding groove, and the first track trolley and the second track trolley both include a first side roller and a second side roller, which are respectively movably arranged in the sliding groove on the lower side of the crossbeam.

[0023] On the other hand, both the first and second track trolleys are equipped with hanging rings at their bottoms. Both the first and second lifting components include lifting hooks and lifting chains, and the maximum load-bearing capacity of the first lifting component is greater than that of the second lifting component. The lifting hook of the first lifting component is detachably hung on the hanging ring of the first track trolley, and the lifting hook of the second lifting component is detachably hung on the hanging ring of the second track trolley.

[0024] On the other hand, there are at least two crossbeams, and the number of hanging plates is the same as the number of crossbeams, and they correspond one-to-one; the ends of each crossbeam away from the hanging plates are installed at intervals on the support frame, and each crossbeam is provided with the first track trolley and the second track trolley.

[0025] On the other hand, the hanging plate has an inverted L-shaped structure, the connecting plate is fixed to the bottom of the short side of the hanging plate, the hanging plate extends in the vertical direction, the connecting plate extends in the horizontal direction, the connecting plate is provided with a plurality of first mounting holes, and the top of the crossbeam is provided with a plurality of second mounting holes on the side opposite to the support frame, and the first mounting holes and the second mounting holes are connected by fasteners.

[0026] On the other hand, an I-beam is welded and fixed to the top of the crossbeam. The length of the I-beam is less than the length of the crossbeam. The side of the I-beam away from the support frame is provided with a relief slope, which avoids the second assembly hole. Furthermore, a number of reinforcing plates are provided at intervals in the groove of the I-beam, and the reinforcing plates extend in the vertical direction.

[0027] This utility model provides a bending roll cylinder replacement device for a hot continuous rolling production line, used for replacing bending roll hydraulic cylinders. The bending roll cylinder is lifted by a first lifting component and a first track trolley, and leveled by a second lifting component and a second track trolley, ensuring stability when moving between the disassembly and installation positions, thus guaranteeing positional accuracy during disassembly and installation. The crossbeam provides support for the first and second track trolleys, ensuring smooth movement of both. The mill main frame fixes the hanging plate, and the support frame and the hanging plate support both ends of the crossbeam, ensuring its stability and thus ensuring the stability of the first and second track trolleys. The stability of the second track trolley ultimately enables smooth movement of the bending roller cylinder. This bending roller cylinder replacement device for the hot continuous rolling production line eliminates the need for manual disassembly and assembly of the connecting shaft and oil tank, effectively reducing crane occupancy and waiting time, shortening downtime, and significantly reducing labor intensity while improving production efficiency. The application of this device transforms the previous paired replacement of inlet and outlet bending roller cylinders into unilateral replacement, making the bending roller cylinder replacement operation more flexible, reducing waste of spare parts, and lowering production costs. The application of this device makes the entire bending roller cylinder replacement process more rational, effectively reducing operational difficulty and ensuring maintenance quality. The application of this device effectively eliminates the safety risks associated with using a spreader beam for lifting and replacing bending roller cylinders, eliminating potential accidents and ensuring personal and equipment safety. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of a specific embodiment of the bending roll cylinder changing device for a hot continuous rolling production line provided by this utility model;

[0030] Figure 2 for Figure 1 A partial structural schematic diagram of the replacement device shown.

[0031] Figure 3 A schematic diagram of the overall structure of the bending roll cylinder replacement device for hot continuous rolling production line provided by this utility model.

[0032] Figure 4 for Figure 1The diagram shows the connection structure between the hanging plate and the crossbeam.

[0033] Figure 5 for Figure 1 A schematic diagram showing the connection structure between the hanging plate, crossbeam, and the first track trolley;

[0034] Figure 6 for Figure 1 The front view of the suspended platform and connecting plate shown;

[0035] Figure 7 for Figure 1 Side view of the suspended platform and connecting plate shown;

[0036] Figure 8 for Figure 1 The top view of the suspended platform and connecting plate shown.

[0037] Figure label:

[0038] Support frame 1; strip plate 11; support column 12; short beam 13; third assembly hole 111; hanging plate 2; connecting plate 21; first assembly hole 211; crossbeam 3; lifting ring 31; slide 32; first track trolley 4; first lifting component 41; first side roller 42; second side roller 43; hanging ring 44; second track trolley 5; second lifting component 51; drive component 6; drive chain 61; I-beam 7; gear base 8; lifting point 81. Detailed Implementation

[0039] The core of this invention is to provide a bending roll cylinder replacement device for a hot continuous rolling production line, which can improve the replacement efficiency of the bending roll cylinder and reduce safety risks.

[0040] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] In this implementation, please refer to Figure 1 , Figure 2 and Figure 4 The bending roll cylinder replacement device for hot continuous rolling production lines includes:

[0042] Support frame 1, which needs to be set separately, is preferably a metal support frame 1, which can provide good support for the crossbeam 3 and ensure stability;

[0043] The hanging plate 2 and the connecting plate 21 are mounted on the main frame of the rolling mill. The connecting plate 21 is fixed to the hanging plate 2 and can be welded to the hanging plate 2, resulting in high connection strength. The hanging plate 2 is also provided with fixing holes, and the hanging plate 2 is fixed to the main frame of the rolling mill by fasteners passing through the fixing holes. The hanging plate 2 and the main frame of the rolling mill are preferably detachably connected. By mounting the hanging plate 2 on the main frame of the rolling mill, the existing structure can be used to effectively support the hanging plate 2, saving space.

[0044] At least one crossbeam 3, one end of which is mounted on the support frame 1 and the other end is mounted on the connecting plate 21. For the convenience of material sourcing and the setting of the first track trolley 4 and the second track trolley 5, the crossbeam 3 can be made of horizontally placed H-beams.

[0045] The first track trolley 4 and the second track trolley 5 are both movably mounted on the crossbeam 3 and can slide along the extension direction of the crossbeam 3; the crossbeam 3 extends in the horizontal direction, and the first track trolley 4 and the second track trolley 5 slide in the horizontal direction.

[0046] The first lifting component 41 is installed on the first track trolley 4 and is used to lift the bending roller cylinder. The first lifting component 41 plays a major role in bearing most of the weight of the bending roller cylinder.

[0047] The second lifting component 51 is installed on the second track trolley 5 and is used to level the bending roller cylinder. The second lifting component 51 plays a leveling role and is used to bear a small part of the weight of the bending roller cylinder.

[0048] The drive component 6 is optionally installed on either the first track trolley 4 or the second track trolley 5. The drive component 6 is used to push the first track trolley 4 or the second track trolley 5 to move. It can be a manual component, such as a chain hoist, or an electronically controlled component, such as a cylinder.

[0049] Furthermore, when the bending cylinder is disassembled, the drive component 6 pulls the second track trolley 5 towards the first track trolley 4, and the second track trolley 5 drives the first track trolley 4 to move synchronously to the disassembly position. After the bending cylinder moves to the disassembly position, it can be removed from the first lifting component 41 and the second lifting component 51. When the bending cylinder is installed, the drive component 6 pulls the first track trolley 4 towards the second track trolley 5, and the first track trolley 4 drives the second track trolley 5 to move synchronously to the installation position. After the bending cylinder moves to the installation position, the first lifting component 41 and the second lifting component 51 can be removed from the bending cylinder.

[0050] The bending cylinder replacement device for a hot continuous rolling mill production line provided by this utility model is used for replacing the hydraulic cylinder of the bending roll. The bending roll cylinder is lifted by a first lifting component 41 and a first track trolley 4, and leveled by a second lifting component 51 and a second track trolley 5, ensuring stability when moving between the disassembly and installation positions, thus guaranteeing positional accuracy during disassembly and installation. The crossbeam 3 provides support for the first track trolley 4 and the second track trolley 5, ensuring smooth movement of both. The mill main frame fixes the hanging plate 2, and the support frame 1 and the hanging plate 2 support both ends of the crossbeam 3, ensuring the stability of the crossbeam 3, and consequently the stability of the first track trolley 4 and the second track trolley 5, ultimately achieving smooth movement of the bending roll cylinder. This bending cylinder replacement device for a hot continuous rolling mill production line eliminates the need for manual disassembly and assembly of the connecting shaft and oil tank, effectively reducing labor intensity, shortening downtime, ensuring maintenance quality, improving production efficiency, reducing safety risks, eliminating accident hazards, and ensuring personal safety.

[0051] In some implementation methods, please refer to Figure 3 The support frame 1 includes a strip plate 11, at least two support columns 12, and a short beam 13. The bottom of the support column 12 is mounted on the anchor bolts of the gear base 8, specifically the anchor bolts on the load side of the gear base 8. Fixing the support column 12 with the anchor bolts of the gear base 8 not only ensures the stability of the support column 12, but also effectively utilizes the existing structure and saves costs. The top of the support column 12 is fixedly connected to the strip plate 11, and the short beam 13 is fixedly connected to the strip plate 11. Fasteners can be used for the connection. The crossbeam 3 is mounted on the short beam 13. Two crossbeams 3 can be placed on the short beam 13 to complete the hoisting of the bending roller cylinders at the two workstations.

[0052] In one specific embodiment, based on the external dimensions of the fixing bolts and nuts of the gear base 8, two steel pipes with a length of 2120mm and a specification of φ200*6mm are selected as support columns 12, and 200*400*20mm steel plates are welded to the top of the steel pipes as strip plates 11, and four φ26mm third assembly holes 111 are reserved at the four corners of the strip plate 11, each 50mm away from the adjacent two sides; a steel pipe with a length of 2400mm and a specification of 200*200*8*13mm is used. The H-beam 13 is made of m. Four fourth assembly holes corresponding to the third assembly holes 111 of the strip plate 11 are reserved at both ends of the short beam 13. The center distance between the fourth assembly holes on the inner side of both ends of the short beam 13 is 1760mm. Two support columns 12 are respectively fitted onto two anchor bolts on the load side of the gear base 8. The fourth assembly holes of the short beam 13 and the third assembly holes 111 of the strip plate 11 are connected by fasteners using eight M24*100mm bolts to form a portal frame.

[0053] In some embodiments, a lifting ring 31 is provided on the end face of the crossbeam 3 away from the support frame 1; the driving component 6 is a chain hoist, which includes a driving hook and a driving chain 61. The driving hook is installed on the driving chain 61, and the driving hook is selectively hung on the first track trolley 4 or the second track trolley 5. One end of the driving chain 61 is a fixed end, and the other end is a movable end. The driving hook is located in the middle of the driving chain 61. The driving component 6 is designed so that the movable end can be manually pulled to drive the driving hook to move, thereby driving the first track trolley 4 or the second track trolley 5 to move. This is convenient to operate and saves time and effort.

[0054] When the bending roller cylinder is disassembled, the drive hook is hung on the second track trolley 5, and the fixed end of the drive chain 61 is hung on the lifting point 81 of the gear base 8. Pulling the movable end of the drive chain 61, the drive hook pulls the second track trolley 5 toward the first track trolley 4, and drives the first track trolley 4 to move synchronously to the disassembly position.

[0055] When the bending roller cylinder is installed, the drive hook is hung on the first track trolley 4, and the fixed end of the drive chain 61 is hung on the lifting ring 31 of the crossbeam 3. Pulling the movable end of the drive chain 61, the hook of the drive component 6 pulls the first track trolley 4 toward the second track trolley 5, and drives the second track trolley 5 to move synchronously to the installation position.

[0056] In some embodiments, the support frame 1 is a portal frame, the support column 12 is a steel pipe, the strip plate 11 is a steel plate, and the short beam 13 is an H-beam. The strip plate 11 is welded and fixed to the top of the support column 12. Furthermore, the strip plate 11 is provided with several third mounting holes 111, the short beam 13 is an H-beam, and several fourth mounting holes are provided at both ends of the short beam 13. The third mounting holes 111 and the fourth mounting holes are connected by fasteners. The steel pipe is readily available, the strip plate 11 is welded and fixed to the steel pipe, and the third mounting holes 111 on the strip plate 11 and the fourth mounting holes on the short beam 13 are fixed by fasteners to form a portal frame structure with high strength and convenient erection of the crossbeam 3. The extension direction of the crossbeam 3 is perpendicular to the plane where the portal frame is located, that is, the extension direction of the crossbeam 3 is perpendicular to the extension direction of the short beam 13, which facilitates the support of two crossbeams 3 and saves space.

[0057] In some implementation methods, please refer to Figure 5 The lower side of the crossbeam 3 is provided with a sliding groove 32. The first track trolley 4 and the second track trolley 5 both include a first side roller 42 and a second side roller 43. There is a gap between the first side roller 42 and the second side roller 43 to allow the crossbeam 3 to be inserted. The first side roller 42 and the second side roller 43 are respectively movably arranged in the sliding groove 32 on the lower side of the crossbeam 3. The first side roller 42 and the second side roller 43 can clamp the crossbeam 3 in the middle to ensure the stability of movement.

[0058] In some embodiments, both the bottom of the first track trolley 4 and the second track trolley 5 are provided with hanging rings 44. Both the first lifting component 41 and the second lifting component 51 include lifting hooks and lifting chains, that is, both the first lifting component 41 and the second lifting component 51 are chain hoists, and the maximum load-bearing capacity of the first lifting component 41 is greater than the maximum load-bearing capacity of the second lifting component 51. The lifting hook of the first lifting component 41 is detachably hung on the hanging ring 44 of the first track trolley 4, and the lifting hook of the second lifting component 51 is detachably hung on the hanging ring 44 of the second track trolley 5. By pulling the lifting chains on the first lifting component 41 and the second lifting component 51, the lifting and leveling of the bending roller cylinder is completed.

[0059] In some embodiments, there are at least two crossbeams 3, and the number of hanging plates 2 is the same as the number of crossbeams 3, and they correspond one-to-one; the ends of each crossbeam 3 facing away from the hanging plates 2 are installed at intervals on the support frame 1, and each crossbeam 3 is provided with a first track trolley 4 and a second track trolley 5; for example Figure 3 As shown, when there are multiple crossbeams 3, the first track trolley 4 and the second track trolley 5 on a single crossbeam 3 are controlled independently, that is, each crossbeam 3 corresponds to the disassembly and replacement of the bending roller cylinder at one workstation; each crossbeam 3 is equipped with a first track trolley 4 and a second track trolley 5, as well as a first lifting component 41 and a second lifting component 51; of course, in order to facilitate operation and improve efficiency, when the disassembly and assembly work corresponding to multiple crossbeams 3 is carried out simultaneously, the drive components 6 on multiple crossbeams 3 can also be controlled simultaneously.

[0060] In some implementation methods, please refer to Figures 6 to 8 The hanging plate 2 has an inverted L-shaped structure. The connecting plate 21 is fixed to the bottom of the short side of the hanging plate 2, and the hanging plate 2 extends vertically while the connecting plate 21 extends horizontally. The connecting plate 21 has several first mounting holes 211. The top of the crossbeam 3 has several second mounting holes on the side opposite to the support frame 1. The first mounting holes 211 and the second mounting holes are connected by fasteners. The fasteners can be bolts, which have high connection strength and are easy to disassemble. The number of first mounting holes 211 and second mounting holes can be multiple to improve reliability.

[0061] In one specific embodiment, an L-shaped hanging plate 2 with a long side of 300*1120mm and a short side of 510*160mm is made using a 30mm thick steel plate. A 200*400*20mm steel plate is horizontally welded above the short side of the L-shaped hanging plate 2 as a connecting plate 21. Two rows of 6-8 fixing holes with a center distance of 100mm between adjacent holes and a vertical distance of 50mm between each hole and the edge are reserved on the steel plate. According to the position and size of the fixing bolt holes of the M70 support roll clamp on the rolling mill stand, two bolt holes with a diameter of φ75mm and a vertical distance of 120mm from the inner edge are reserved on the long side of the L-shaped hanging plate 2.

[0062] In some embodiments, an I-beam 7 is welded and fixed to the top of the crossbeam 3. The I-beam 7 can improve the strength of the crossbeam 3. The length of the I-beam 7 is less than the length of the crossbeam 3. The side of the I-beam 7 away from the support frame 1 is provided with a relief slope, which avoids the second assembly hole. The relief slope slopes from top to bottom from the side closest to the support frame 1 to the other side. This arrangement can enhance the force on the crossbeam 3 in the vertical direction. In addition, a number of reinforcing plates are provided at intervals in the groove of the I-beam 7. The reinforcing plates extend in the vertical direction to reduce the deformation of the I-beam 7, thereby reducing the deformation of the crossbeam 3 and ensuring stability.

[0063] In one specific embodiment, a 6200mm long H-beam with dimensions of 200*200*8*13mm is cut as a crossbeam 3. A 5000mm long I-beam 7 with dimensions of 150*100*6*10mm is welded above the crossbeam 3 for reinforcement. The two steel sections are aligned at one end to enable them to withstand a weight of 10T. A lifting ring 31 with an inner hole of φ40mm is welded to the other end of the crossbeam 3. Four bolt holes with eight bolts corresponding to the L-shaped lifting plate 2 are reserved on both sides at a distance of 1000mm from the end face. Two sets of sliding trolleys are installed below the crossbeam 3 for suspending the chain hoist and moving the bending roller hydraulic cylinder.

[0064] The above-mentioned bending roll cylinder replacement device for hot continuous rolling production line includes the following steps:

[0065] Step S1: When the bending roller cylinder needs to be disassembled, control the drive component 6 to move. The drive component 6 pulls the second track trolley 5 towards the first track trolley 4; the second track trolley 5 drives the first track trolley 4 to move synchronously to the disassembly position.

[0066] Step S2: Control the first lifting component 41 and the second lifting component 51 to descend to the dismantling height of the dismantling position, and dismantle the bending roller cylinder from the first lifting component 41 and the second lifting component 51;

[0067] Step S3: Replace the bending roller cylinder and install the bending roller cylinder on the first lifting component 41 and the second lifting component 51. Operate the first lifting component 41 and the second lifting component 51, level the bending roller cylinder, and then raise the bending roller cylinder to the translation height.

[0068] Step S4: Control the drive component 6 to move. The drive component 6 pulls the first track trolley 4 towards the second track trolley 5. The first track trolley 4 drives the second track trolley 5 to move synchronously to the installation position. It should be noted that the position of the drive component 6 is different in the two movement modes: the first track trolley 4 and the second track trolley 5 move synchronously to the disassembly position and the first track trolley 4 and the second track trolley 5 move synchronously to the installation position.

[0069] Step S5: Control the first lifting component 41 and the second lifting component 51 to descend to the installation height of the installation position. After the bending roll cylinder is engaged with the positioning key of the rolling mill, remove the first lifting component 41 and the second lifting component 51 from the bending roll cylinder.

[0070] The above method involves controlling the drive component 6 to move the second track trolley 5 towards the first track trolley 4; the second track trolley 5 then moves the first track trolley 4 synchronously to the disassembly position; then, the first lifting component 41 and the second lifting component 51 are lowered to the disassembly height of the disassembly position (which can be the ground level), and the bending roller cylinder is removed from the first lifting component 41 and the second lifting component 51, completing the disassembly process. Finally, the disassembled bending roller cylinder can be lifted out by a crane and placed in the spare parts area; a new bending roller cylinder is then replaced and installed on the first lifting component 41 and the second lifting component 51. After leveling the bending roller cylinder, it is then lifted out by the first lifting component 41 and the second lifting component 51. Component 51 raises the bending cylinder to the translation height; controls the drive component 6 to move, the drive component 6 pulls the first track trolley 4 towards the second track trolley 5; the first track trolley 4 drives the second track trolley 5 to move synchronously to the installation position; controls the first lifting component 41 and the second lifting component 51 to descend to the installation height of the installation position, until the bending cylinder engages with the positioning key of the rolling mill, then the first lifting component 41 and the second lifting component 51 can be removed; this bending cylinder replacement method in the hot continuous rolling production line is convenient to operate. The entire lifting work of the bending cylinder is completed by the drive component 6, the first lifting component 41 and the second lifting component 51, which can effectively reduce labor intensity, improve the displacement accuracy of the bending cylinder, and improve disassembly and assembly efficiency.

[0071] In one specific embodiment, the operation process of the bending roll cylinder replacement device for hot continuous rolling production line provided by this utility model is as follows:

[0072] Two 5t chain hoists were used to lift the upper and lower shafts respectively from two lifting points on the mill platform directly above the shaft sleeve, and the shaft clamps were opened. The L-shaped hanging plate 2 was rotated 180° with the short side on top and facing the rolling center line, so that the φ75mm bolt holes were aligned with the M70mm bolt holes on the mill stand. The L-shaped hanging plate 2 was fixed to the mill stand with two M70*80mm bolts. The crossbeam 3 was then lifted in using a crane, so that the eight bolt holes on the crossbeam 3 were aligned with the eight bolt holes on the L-shaped hanging plate 2. One end of the crossbeam 3 was fixed to the hanging plate 2 with eight M24*100mm bolts. The other end of the crossbeam 3 was placed above the portal support frame 1, and the crossbeam 3 was connected and fixed to the support frame 1 with four M24*100mm bolts. The tooling assembly was completed, making the entire tooling a solid whole.

[0073] Dismantling the bending roller cylinder: A 5t chain hoist is used as the first lifting component 41, suspended on the first track trolley 4 on the inner side below the crossbeam 3, with the hook of the first lifting component 41 attached to the lifting point of the bending roller cylinder. A 3t chain hoist is used as the second lifting component 51, suspended on the second track trolley 5 on the outer side below the crossbeam 3, with the hook attached to the lifting point on the outer side of the bending roller cylinder body. The first lifting component 41 and the second lifting component 51 are lifted simultaneously. The first lifting component 41 lifts the bending roller cylinder, and the second lifting component 51 is adjusted to keep the bending roller cylinder horizontal. Then, a 1-ton chain hoist is used as the drive component 6, which is suspended at the lifting point 81 of the gear base 8 below the crossbeam 3. The hook of the drive component 6 is attached to the second rail trolley 5 above the second lifting component 51. The drive component 6 is pulled to pull the old bending roll cylinder out to a position outside the rolling mill stand where the overhead crane can lift it without obstruction, i.e., the disassembly position. The first lifting component 41 and the second lifting component 51 are lowered so that the hydraulic cylinder is reliably placed on the ground. The first lifting component 41 and the second lifting component 51 are removed. Finally, the overhead crane is used to directly lift the old bending roll cylinder out and place it in the spare parts area.

[0074] Installation process of the bending roller cylinder: First, use a crane to hoist the new bending roller cylinder below the crossbeam 3. The hook of the first lifting component 41 is attached to the lifting position of the new bending roller cylinder, and the hook of the second lifting component 51 is attached to the lifting point on the outside of the cylinder body. Simultaneously, lift both the first lifting component 41 and the second lifting component 51 to raise the new bending roller cylinder to the installation height. Adjust the second lifting component 51 to keep the new bending roller cylinder horizontal. Then, use a 1t chain hoist as the drive component 6, suspending it on the φ40mm lifting ring 31 at the end of the crossbeam 3. The hook of the drive component 6 is attached to the first track trolley 4 above the first lifting component 41. Figure 2 As shown, the pull drive component 6 pulls the new bending cylinder into the mill stand to the installation position of the bending cylinder. Then, the first lifting component 41 and the second lifting component 51 work together to adjust the height so that the positioning keyway of the new bending cylinder is aligned with the positioning key on the mill stand. Finally, the bending cylinder fixing bolts are installed and tightened.

[0075] After the bending roller cylinder is installed, remove and replace the tooling in sequence, and then test run;

[0076] After the test run was successful, the two 5T chain hoists with the hanging shaft sleeve were removed, and the bending roller cylinder was replaced.

[0077] The above provides a detailed description of the bending roll cylinder changing device for a hot continuous rolling production line provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A bending roll cylinder changing device for a hot continuous rolling production line, characterized in that, include: The support frame (1) is installed on the anchor bolts on the load side of the gear base (8); A hanging plate (2) and a connecting plate (21), wherein the hanging plate (2) is installed on the main frame of the rolling mill, and the connecting plate (21) is fixed on the hanging plate (2); At least one crossbeam (3), one end of which is mounted on the support frame (1) and the other end is mounted on the connecting plate (21); The first track trolley (4) and the second track trolley (5) are both movably mounted on the crossbeam (3) and can slide along the extension direction of the crossbeam (3); The first lifting component (41) is installed on the first track trolley (4) and is used to lift the bending roller cylinder; The second lifting component (51) is installed on the second track trolley (5) and is used to level the bending roller cylinder; The drive component (6) is selectively installed on the first track trolley (4) or the second track trolley (5) to pull the bending roller cylinder out or in along the extension direction of the crossbeam (3); Furthermore, when the bending roller cylinder is disassembled, the driving component (6) pulls the second track trolley (5) toward the first track trolley (4), and the second track trolley (5) drives the first track trolley (4) to move synchronously to the disassembly position; when the bending roller cylinder is installed, the driving component (6) pulls the first track trolley (4) toward the second track trolley (5), and the first track trolley (4) drives the second track trolley (5) to move synchronously to the installation position.

2. The bending roll cylinder changing device for a hot continuous rolling production line according to claim 1, characterized in that, The support frame (1) includes a strip plate (11), at least two support columns (12) and a short beam (13). The bottom of the support column (12) is mounted on the anchor bolts of the gear base (8). The top of the support column (12) is fixedly connected to the strip plate (11). The short beam (13) is connected to the strip plate (11) by fasteners. The crossbeam (3) is mounted on the short beam (13).

3. The bending roll cylinder changing device for a hot continuous rolling production line according to claim 2, characterized in that, The crossbeam (3) has a lifting ring (31) on one end face away from the support frame (1); the driving component (6) includes a driving hook and a driving chain (61), the driving hook is installed on the driving chain (61), and the driving hook is selectively hung on the first track trolley (4) or the second track trolley (5); When the bending roller cylinder is disassembled, the drive hook is hung on the second track trolley (5), and the fixed end of the drive chain (61) is hung on the lifting point (81) of the gear base (8). Pulling the movable end of the drive chain (61), the drive hook pulls the second track trolley (5) toward the first track trolley (4) and drives the first track trolley (4) to move synchronously to the disassembly position. When the bending roller cylinder is installed, the drive hook is hung on the first track trolley (4), and the fixed end of the drive chain (61) is hung on the lifting ring (31) of the crossbeam (3). Pulling the movable end of the drive chain (61), the hook of the drive component (6) pulls the first track trolley (4) toward the second track trolley (5) and drives the second track trolley (5) to move synchronously to the installation position.

4. The bending roll cylinder changing device for a hot continuous rolling production line according to claim 2, characterized in that, The support frame (1) is a portal frame, the support column (12) is a steel pipe, the strip plate (11) is a steel plate, the strip plate (11) is welded and fixed to the top of the support column (12), the strip plate (11) is provided with a number of third assembly holes (111), the short beam (13) is an H-beam, the two ends of the short beam (13) are provided with a number of fourth assembly holes, and the third assembly holes (111) and the fourth assembly holes are connected by fasteners.

5. The bending roll cylinder changing device for a hot continuous rolling production line according to claim 1, characterized in that, The lower side of the crossbeam (3) is provided with a groove (32). The first track trolley (4) and the second track trolley (5) each include a first side roller (42) and a second side roller (43). The first side roller (42) and the second side roller (43) are respectively movably arranged in the groove (32) on the lower side of the crossbeam (3).

6. The bending roll cylinder changing device for a hot continuous rolling production line according to claim 1, characterized in that, The bottom of the first track trolley (4) and the second track trolley (5) are provided with hanging rings (44). The first lifting component (41) and the second lifting component (51) both include lifting hooks and lifting chains. The maximum load capacity of the first lifting component (41) is greater than the maximum load capacity of the second lifting component (51). The lifting hook of the first lifting component (41) is detachably hung on the hanging ring (44) of the first track trolley (4), and the lifting hook of the second lifting component (51) is detachably hung on the hanging ring (44) of the second track trolley (5).

7. The bending roll cylinder changing device for a hot continuous rolling production line according to claim 1, characterized in that, The number of the crossbeams (3) is at least two, the number of the hanging plates (2) is the same as the number of the crossbeams (3), and they correspond one to one; the end of each crossbeam (3) away from the hanging plate (2) is installed on the support frame (1) at intervals, and each crossbeam (3) is provided with the first track trolley (4) and the second track trolley (5).

8. The bending roll cylinder changing device for a hot continuous rolling production line according to any one of claims 1 to 7, characterized in that, The hanging plate (2) has an inverted L-shaped structure. The connecting plate (21) is fixed to the bottom of the short side of the hanging plate (2). The hanging plate (2) extends vertically, and the connecting plate (21) extends horizontally. The connecting plate (21) is provided with a number of first mounting holes (211). The top of the crossbeam (3) is provided with a number of second mounting holes on the side away from the support frame (1). The first mounting holes (211) and the second mounting holes are connected by fasteners.

9. The bending roll cylinder changing device for a hot continuous rolling production line according to claim 8, characterized in that, The top of the crossbeam (3) is welded and fixed with an I-beam (7). The length of the I-beam (7) is less than the length of the crossbeam (3). The side of the I-beam (7) away from the support frame (1) is provided with a relief slope and avoids the second assembly hole. Furthermore, a number of reinforcing plates are provided at intervals in the groove of the I-beam (7). The reinforcing plates extend in the vertical direction.

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