Roller bending cylinder replacing device and method for hot continuous rolling production line

Abstract

The invention discloses a roll bending cylinder replacement device and method 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 roller bending cylinder replacing device, the whole roller 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] The invention relates to the field of hot rolling production lines, and in particular to a device and method for replacing a bending roll cylinder for a hot rolling production line. Background Art

[0002] In the wide strip hot rolling production line, the finishing rolling bending cylinder, that is, the finishing rolling bending hydraulic cylinder, is installed inside the rolling mill arch on the transmission side. It is a device that effectively controls the plate shape. The rolling mill plate shape control has gradually become one of the core technologies of plate and strip processing in the actual production process. The wide strip hot rolling finishing mill unit changes the effective crown of the roll through the bending roll hydraulic control system, thereby achieving the purpose of plate shape control standard and ensuring product quality.

[0003] When the bending roller hydraulic cylinder needs to be overhauled or reaches the end of its service life, it is necessary to replace the bending roller hydraulic cylinder. In the related art, during the replacement of the bending roller hydraulic cylinder, the connecting shaft and the oil tank of the finishing mill need to be removed in advance, which is labor-intensive and prolongs the downtime. The removal of the old bending roller hydraulic cylinder requires the use of a crane to tie two steel ropes and lift a 5.5m long shoulder beam. A 5t fall chain and a 3t fall chain are used at one end of the shoulder beam to tie the old bending roller hydraulic cylinder to its lifting point, and the other end of the shoulder beam uses the same method to tie a new bending roller hydraulic cylinder as a counterweight.

[0004] However, in the related art, during the dismantling and lifting process of the old bending roller hydraulic cylinder, the shoulder pole beam is not reliably fixed, which may easily cause the bending roller hydraulic cylinders at both ends of the shoulder pole beam to swing irregularly, posing a risk to the personal safety of surrounding workers; in addition, the waiting time for driving is wasted, the maintenance efficiency is low, and the downtime of the production line is restricted, affecting production efficiency.

[0005] Therefore, how to effectively improve the replacement efficiency of the bending roller cylinder and reduce safety risks is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0006] The purpose of the present invention is to provide a device and method for replacing a bending roll cylinder for a hot rolling production line, which are used to reduce safety risks, eliminate potential accidents and ensure personal safety.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A bending cylinder replacement device for a hot rolling production line, comprising:

[0009] Support frame, 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 on 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 rail trolley and the second rail trolley are both movably arranged on the crossbeam and can slide along the extension direction of the crossbeam;

[0013] A first lifting component is installed on the first rail trolley and is used to lift the roll bending cylinder;

[0014] a second lifting component, mounted on the second rail trolley, for leveling the roll bending cylinder;

[0015] A driving component, optionally installed on the first rail trolley or the second rail trolley, used to pull the roller bending cylinder out or in along the extension direction of the crossbeam;

[0016] Furthermore, when the roller bending cylinder is disassembled, the driving component pulls the second rail trolley toward the first rail trolley, and the second rail trolley drives the first rail trolley to move synchronously to the disassembly position; when the roller bending cylinder is installed, the driving component pulls the second rail trolley toward the second rail trolley, and the first rail trolley drives the second rail 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 installed on the anchor bolts of the gear base, 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 cross beam is installed on the short beam.

[0018] On the other hand, a lifting ring is provided on the end surface of one end of the beam away from the supporting frame; the driving component comprises a driving hook and a driving chain, the driving hook is mounted on the driving chain, and the driving hook is selectively hung on the first rail trolley or the second rail trolley;

[0019] When the roll bending cylinder is disassembled, the driving hook is hung on the second rail trolley, the fixed end of the driving chain is hung on the hanging point of the gear base, and the movable end of the driving chain is pulled, so that the driving hook pulls the second rail trolley toward the first rail trolley and drives the first rail trolley to move to the disassembly position synchronously;

[0020] When the roller bending cylinder is installed, the driving hook is hung on the first rail trolley, the fixed end of the driving chain is hung on the lifting ring of the crossbeam, and the movable end of the driving chain is pulled, and the hook of the driving component pulls the first rail trolley toward the second rail trolley and drives the second rail 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, a plurality of third assembly holes are arranged at the four corners of the strip plate, the short beam is an H-shaped steel, a plurality of fourth assembly holes corresponding to the third assembly holes are arranged 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, a slide groove is provided on the lower side of the cross beam, and the first rail trolley and the second rail trolley both include a first side roller and a second side roller, and the first side roller and the second side roller are respectively movably arranged in the slide groove on the lower side of the cross beam.

[0023] On the other hand, hanging rings are provided at the bottom of the first rail trolley and the second rail trolley, the first lifting component and the second lifting component both include a lifting hook and a lifting chain, and the maximum bearing capacity of the first lifting component is greater than the maximum bearing capacity of the second lifting component; the lifting hook of the first lifting component is detachably hung on the hanging ring of the first rail trolley, and the lifting hook of the second lifting component is detachably hung on the hanging ring of the second rail trolley.

[0024] On the other hand, the number of the cross beams is at least two, and the number of the hangers is the same as the number of the cross beams and corresponds one to one; each cross beam is installed on the support frame at an interval at one end away from the hanger, and each cross beam is provided with the first rail trolley and the second rail trolley.

[0025] On the other hand, the hanger plate is an inverted L-shaped structure, the connecting plate is fixed at the bottom of the short side of the hanger plate, and the hanger plate extends in the vertical direction, the connecting plate extends in the horizontal direction, and a plurality of first assembly holes are provided on the connecting plate. A plurality of second assembly holes are provided on the top of the beam away from the support frame, and the first assembly holes are connected to the second assembly holes 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 smaller than the length of the crossbeam, and an avoidance slope is provided on the side of the I-beam away from the support frame to avoid the second assembly hole; and a plurality of reinforcing plates are provided at intervals in the groove of the I-beam, and the reinforcing plates extend in the vertical direction.

[0027] A method for replacing a bending cylinder for a hot rolling production line, using the above-mentioned bending cylinder replacement device for a hot rolling production line, comprises the following steps:

[0028] Step S1: judging the state of the roll bending cylinder, and when the roll bending cylinder needs to be disassembled, hanging the first lifting component and the second lifting component on the lifting point of the roll bending cylinder, controlling the action of the driving component, and the driving component pulling the second rail trolley to move toward the first rail trolley; the second rail trolley drives the first rail trolley to move synchronously to the disassembly position;

[0029] Step S2: controlling the first lifting component and the second lifting component to descend to the disassembly height of the disassembly position, and disassembling the roll bending cylinder from the first lifting component and the second lifting component;

[0030] Step S3: replacing the roll bending cylinder and installing the roll bending cylinder on the first lifting component and the second lifting component, operating the first lifting component and the second lifting component, leveling the roll bending cylinder, and then raising the roll bending cylinder to a translation height;

[0031] Step S4: controlling the driving component to move, the driving component pulls the first rail trolley to move toward the second rail trolley; the first rail trolley drives the second rail trolley to move synchronously to the installation position;

[0032] Step S5: Control the first lifting component and the second lifting component to descend to the installation height of the installation position, and after the bending roll cylinder cooperates with the positioning key of the rolling mill, remove the first lifting component and the second lifting component from the bending roll cylinder.

[0033] The bending roll cylinder replacement device for a hot rolling production line provided by the present invention is used for replacing a bending roll hydraulic cylinder. The bending roll cylinder is lifted by the first lifting component and the first rail trolley, and the bending roll cylinder is leveled by the second lifting component and the second rail trolley to ensure that the bending roll cylinder remains stable when moving between the disassembly position and the installation position, thereby ensuring the position accuracy during disassembly and installation; the first rail trolley and the second rail trolley are provided with support by the setting of the crossbeam to ensure smooth movement of the first rail trolley and the second rail trolley; the hanging plate is fixed by the rolling mill main frame, and then the two ends of the crossbeam are supported by the support frame and the hanging plate to ensure the stability of the crossbeam, thereby ensuring the stability of the first rail trolley The stability of the car and the second rail trolley is finally realized, and the smooth movement of the bending cylinder is finally realized; the bending cylinder replacement device used in the hot rolling production line does not need to be manually disassembled and assembled with the connecting shaft and the oil tank, which effectively reduces the occupancy of the driving and the waiting time of the driving, shortens the downtime, can effectively reduce the labor intensity, and improve the production efficiency; through the application of the device of the present invention, the previous replacement of the inlet and outlet bending cylinders in pairs is transformed into single-side replacement, which makes the bending cylinder replacement operation more flexible, reduces the waste of spare parts resources, and reduces the production cost; through the application of the device of the present invention, the entire bending cylinder replacement process is made more reasonable, the operation difficulty is effectively reduced, and the maintenance quality is guaranteed; through the application of the device of the present invention, the safety risks brought by the use of a shoulder pole beam to lift and replace the bending cylinder can be effectively eliminated, the potential safety of accidents is eliminated, and the personal safety and equipment safety are guaranteed.

[0034] The method for replacing a bending cylinder for a hot rolling production line provided by the present invention comprises the following steps: controlling the movement of the driving component, wherein the driving component pulls the second rail trolley toward the first rail trolley; the second rail trolley drives the first rail trolley to move synchronously to a disassembly position; then controlling the first lifting component and the second lifting component to descend to a disassembly height of the disassembly position, which may be the height of the ground, and disassembling the bending cylinder from the first lifting component and the second lifting component to complete the disassembly process, and finally the disassembled bending cylinder can be lifted out by a crane and placed in a spare parts area; replacing the new bending cylinder and installing the new bending cylinder on the first lifting component and the second lifting component, and after leveling the bending cylinder, The lifting component and the second lifting component raise the roll bending cylinder to a translation height; the driving component is controlled to move, and the driving component pulls the first rail trolley toward the second rail trolley; the first rail trolley drives the second rail trolley to move synchronously to the installation position; the first lifting component and the second lifting component are controlled to descend to the installation height of the installation position, and after the roll bending cylinder cooperates with the positioning key of the rolling mill, the first lifting component and the second lifting component can be removed; the roll bending cylinder replacement method for the hot rolling production line is easy to operate, and the entire lifting work of the roll bending cylinder is completed by the driving component, the first lifting component and the second lifting component, which can effectively reduce labor intensity, improve the displacement accuracy of the roll bending cylinder, and improve the disassembly and assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A structural schematic diagram of a specific implementation of the bending cylinder replacement device for a hot rolling production line provided by the present invention;

[0037] Figure 2 for Figure 1 A partial structural schematic diagram of the replacement device shown;

[0038] Figure 3 This is a schematic diagram of the overall structure of the bending roll cylinder replacement device for the hot rolling production line provided by the present invention;

[0039] Figure 4 for Figure 1 Schematic diagram of the connection structure between the hanging plate and the beam shown;

[0040] Figure 5 for Figure 1 A schematic diagram of the connection structure between the hanging plate, the crossbeam and the first rail trolley shown;

[0041] Figure 6 for Figure 1 The front view of the hanging plate and the connecting plate shown;

[0042] Figure 7 for Figure 1 A side view of the hanging plate and the connecting plate shown;

[0043] Figure 8 for Figure 1 A top view of the hanging plate and the connecting plate shown;

[0044] Fig. 9 The present invention provides a flow chart of a method for replacing a bending roll cylinder for a hot rolling production line.

[0045] Reference numerals:

[0046] 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 groove 32; first rail trolley 4; first lifting component 41; first side roller 42; second side roller 43; hanging ring 44; second rail trolley 5; second lifting component 51; driving component 6; driving chain 61; I-beam 7; gear base 8; hanging point 81. DETAILED DESCRIPTION

[0047] The core of the present invention is to provide a device and method for replacing a bending cylinder for a hot rolling production line, which can improve the replacement efficiency of the bending cylinder and reduce safety risks.

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0049] In this implementation, please refer to Figure 1 , Figure 2 and Figure 4 The bending cylinder replacement device for hot rolling production line includes:

[0050] Support frame 1, support frame 1 needs to be set separately, and support frame 1 is preferably a metal support frame 1, which can play a good supporting role on beam 3 and ensure stability;

[0051] The hanging plate 2 and the connecting plate 21, the hanging plate 2 is installed on the main frame of the rolling mill, the connecting plate 21 is fixed on the hanging plate 2, and the connecting plate 21 can be welded and fixed on the hanging plate 2, and the connection strength is high; the hanging plate 2 is also provided with a fixing hole, and the hanging plate 2 is fixed to the main frame of the rolling mill through a fastener penetrating the fixing hole; the hanging plate 2 and the main frame of the rolling mill are preferably detachably connected; by installing 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 and save space;

[0052] At least one cross beam 3, one end of the cross beam 3 is mounted on the support frame 1, and the other end is mounted on the connecting plate 21. In order to facilitate the material collection and the arrangement of the first rail trolley 4 and the second rail trolley 5, the cross beam 3 can be a horizontally placed H-shaped steel;

[0053] The first rail trolley 4 and the second rail trolley 5 are both movably arranged 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 rail trolley 4 and the second rail trolley 5 slide along the horizontal direction;

[0054] A first lifting component 41 is installed on the first rail trolley 4 and is used to lift the roll bending cylinder. The first lifting component 41 plays a major role in bearing most of the weight of the roll bending cylinder.

[0055] A second lifting component 51 is installed on the second rail trolley 5 and is used for leveling the roll bending cylinder. The second lifting component 51 plays a leveling role and is used to bear a small part of the weight of the roll bending cylinder;

[0056] A driving component 6 is selectively installed on the first rail trolley 4 or the second rail trolley 5. The driving component 6 is used to push the first rail trolley 4 or the second rail trolley 5 to move. It can be a manual component, such as a fall chain, or an electronically controlled component, such as a cylinder.

[0057] Furthermore, when the roll bending cylinder is disassembled, the driving component 6 pulls the second rail trolley 5 toward the first rail trolley 4, and the second rail trolley 5 drives the first rail trolley 4 to move synchronously to the disassembly position. After the roll 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 roll bending cylinder is installed, the driving component 6 pulls the first rail trolley 4 toward the second rail trolley 5, and the first rail trolley 4 drives the second rail trolley 5 to move synchronously to the installation position. After the roll bending cylinder moves to the installation position, the first lifting component 41 and the second lifting component 51 can be removed from the roll bending cylinder.

[0058] The bending roll cylinder replacement device for a hot rolling production line provided by the present invention is used for replacing the bending roll hydraulic cylinder. The bending roll cylinder is lifted by the first lifting component 41 and the first rail trolley 4, and the bending roll cylinder is leveled by the second lifting component 51 and the second rail trolley 5 to ensure that the bending roll cylinder remains stable when moving between the disassembly position and the installation position, thereby ensuring the position accuracy during disassembly and installation; through the setting of the crossbeam 3, support is provided for the first rail trolley 4 and the second rail trolley 5, thereby ensuring the smooth movement of the first rail trolley 4 and the second rail trolley 5; the hanging plate 2 is fixed by the rolling mill main frame, and then the two ends of the crossbeam 3 are supported by the support frame 1 and the hanging plate 2, thereby ensuring the stability of the crossbeam 3, and then ensuring the stability of the first rail trolley 4 and the second rail trolley 5, and finally achieving the smooth movement of the bending roll cylinder; the bending roll cylinder replacement device for a hot rolling production line does not require manual disassembly and assembly of the connecting shaft and the oil tank, can effectively reduce labor intensity, shorten downtime, ensure maintenance quality, improve production efficiency, reduce safety risks, eliminate accident hazards, and ensure personal safety.

[0059] In some embodiments, 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 installed on the anchor bolts of the gear base 8, specifically the anchor bolts on the load side of the gear base 8. The support column 12 is fixed with the anchor bolts of the gear base 8, which can not only ensure the stability of the support column 12, but also effectively utilize the existing structure and save 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, which can be connected with fasteners, and the cross beam 3 is installed on the short beam 13; two cross beams 3 can be placed on the short beam 13, thereby completing the hoisting of the bending roller cylinder on the two stations.

[0060] In a specific embodiment, according to the outer dimensions of the fixing bolts and nuts of the gear base 8, two steel pipes with a length of 2120 mm and a specification of φ200*6 mm are selected as the support column 12, and 200*400*20 mm steel plates are welded on the top of the steel pipes as the strip plate 11, and four third assembly holes 111 with a diameter of φ26 mm and a distance of 50 mm from the adjacent two sides are reserved at the four corners of the strip plate 11; one steel pipe with a length of 2400 mm and a specification of 200*200*8*13 mm is used. m H-shaped steel is used as the short beam 13, and 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, and the center distance of the fourth assembly holes on the inner sides of both ends of the short beam 13 is 1760mm; two support columns 12 are respectively mounted on the two anchor bolts on the load side of the gear base 8, and 8 M24*100mm bolts are used to connect the fourth assembly holes of the short beam 13 and the third assembly holes 111 of the strip plate 11 through fasteners to form a door-type bracket.

[0061] In some embodiments, a lifting ring 31 is provided on the end surface of the crossbeam 3 away from the support frame 1; the driving component 6 is a fall chain, and 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 hung on the first rail trolley 4 or the second rail trolley 5, one end of the driving chain 61 is a fixed end, and the other end is a movable end, and the driving hook is arranged in the middle of the driving chain 61. The driving component 6 is arranged to manually pull the movable end, and then drive the driving hook to move, thereby driving the first rail trolley 4 or the second rail trolley 5 to move, which is easy to operate and saves time and effort;

[0062] When the bending cylinder is disassembled, the driving hook is hung on the second rail trolley 5, the fixed end of the driving chain 61 is hung on the hanging point 81 of the gear base 8, and the movable end of the driving chain 61 is pulled, and the driving hook pulls the second rail trolley 5 toward the first rail trolley 4, and drives the first rail trolley 4 to move to the disassembly position synchronously;

[0063] When the bending roller cylinder is installed, the driving hook is hung on the first rail trolley 4, the fixed end of the driving chain 61 is hung on the ring 31 of the beam 3, and the movable end of the driving chain 61 is pulled. The hook of the driving component 6 pulls the first rail trolley 4 toward the second rail trolley 5 and drives the second rail trolley 5 to move synchronously to the installation position.

[0064] 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, the short beam 13 is an H-shaped steel, and the strip plate 11 is welded and fixed to the top of the support column 12; further, a plurality of third assembly holes 111 are provided on the strip plate 11, the short beam 13 is an H-shaped steel, and a plurality of fourth assembly holes are provided at both ends of the short beam 13, and the third assembly holes 111 are connected to the fourth assembly holes by fasteners; the steel pipe is easy to obtain, the strip plate 11 is welded and fixed to the steel pipe, and the third assembly holes 111 on the strip plate 11 and the fourth assembly holes on the short beam 13 are fixed by fasteners to form a portal frame structure with high strength and convenient for the installation 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 is convenient for supporting two crossbeams 3 and saving space.

[0065] In some embodiments, please refer to Figure 5 A slide groove 32 is provided on the lower side of the beam 3. The first rail trolley 4 and the second rail trolley 5 both include a first side roller 42 and a second side roller 43. A spacing is provided between the first side roller 42 and the second side roller 43 for the beam 3 to be placed therein. The first side roller 42 and the second side roller 43 are respectively movably arranged in the slide groove 32 on the lower side of the beam 3. The first side roller 42 and the second side roller 43 can clamp the beam 3 in the middle to ensure movement stability.

[0066] In some embodiments, a hanging ring 44 is provided at the bottom of the first rail trolley 4 and the second rail trolley 5, and the first lifting component 41 and the second lifting component 51 both include a lifting hook and a lifting chain, that is, the first lifting component 41 and the second lifting component 51 are both fall chains, and the maximum bearing capacity of the first lifting component 41 is greater than the maximum 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 rail trolley 4, and the lifting hook of the second lifting component 51 is detachably hung on the hanging ring 44 of the second rail 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 are completed.

[0067] In some embodiments, the number of beams 3 is at least two, the number of hangers 2 is the same as the number of beams 3, and they correspond one to one; each beam 3 is installed on the support frame 1 at an interval at one end away from the hanger 2, and each beam 3 is provided with a first rail trolley 4 and a second rail trolley 5; Figure 3 As shown, when there are multiple beams 3, the first rail trolley 4 and the second rail trolley 5 on a single beam 3 are controlled separately, that is, each beam 3 corresponds to the disassembly, assembly and replacement of the bending roller cylinder on a workstation; each beam 3 is provided with the first rail trolley 4 and the second rail trolley 5 and the first lifting component 41 and the second lifting component 51; of course, in order to facilitate operation and improve efficiency, when the disassembly and assembly work corresponding to multiple beams 3 is carried out synchronously, the driving components 6 on multiple beams 3 can also be controlled at the same time.

[0068] In some embodiments, please refer to Figures 6 to 8 The hanging plate 2 is an inverted L-shaped structure, the connecting plate 21 is fixed at the bottom of the short side of the hanging plate 2, and the hanging plate 2 extends in the vertical direction, and the connecting plate 21 extends in the horizontal direction. A plurality of first assembly holes 211 are provided on the connecting plate 21, and a plurality of second assembly holes are provided on the side of the top of the beam 3 away from the support frame 1. The first assembly hole 211 is connected to the second assembly hole by a fastener; the fastener can be a bolt with high connection strength and convenient disassembly; the number of the first assembly hole 211 and the second assembly hole can be multiple to improve reliability.

[0069] In a specific embodiment, a 30mm thick steel plate is used to make an L-shaped hanger plate 2 with a long side of 300*1120mm and a short side of 510*160mm, and a 200*400*20mm steel plate is horizontally welded above the short side of the L-shaped hanger plate 2 as a connecting plate 21, and two rows of adjacent holes with a center distance of 100mm and each hole with a vertical distance of 50mm from the edge are reserved on the steel plate, 6-8 fixing holes; according to the position and size of the M70 support roller clamp fixing bolt holes on the rolling mill arch, two bolt holes with a vertical distance of 120mm from the inner edge and a diameter of φ75mm are reserved on the long side of the L-shaped hanger plate 2.

[0070] In some embodiments, an I-beam 7 is welded and fixed to the top of the beam 3, and the I-beam 7 can improve the strength of the beam 3. The length of the I-beam 7 is less than the length of the beam 3. The side of the I-beam 7 facing away from the support frame 1 is provided with an avoidance slope, and the second assembly hole is avoided; the avoidance slope is inclined from top to bottom from one side close to the support frame 1 to the other side. Such a setting can enhance the force on the beam 3 in the vertical direction; and, a plurality of reinforcing plates are provided at intervals in the groove of the I-beam 7, and the reinforcing plates extend in the vertical direction to reduce the deformation of the I-beam 7, thereby reducing the deformation of the beam 3 and ensuring stability.

[0071] In a specific embodiment, an H-shaped steel with a length of 6200 mm and a specification of 200*200*8*13 mm is cut as the crossbeam 3, and an I-shaped steel 7 with a length of 5000 mm and a specification of 150*100*6*10 mm is welded above the crossbeam 3 for reinforcement. One end of the two steel sections is flush so that it can withstand a weight of 10 tons. A lifting ring 31 with an inner hole of φ40 mm is welded at the other end of the crossbeam 3, and 4 bolt holes corresponding to the L-shaped hanging plate 2 are reserved on both sides at a distance of 1000 mm from the end face; 2 sets of sliding trolleys are installed under the crossbeam 3 to suspend the fall chain and move the bending roller hydraulic cylinder

[0072] In addition to the above-mentioned bending cylinder replacement device for hot rolling production line, the present invention also provides a method for replacing the bending cylinder for hot rolling production line. Fig. 9 As shown, the method for replacing the bending cylinder for the hot rolling production line includes the following steps:

[0073] Step S1: When the roll bending cylinder needs to be disassembled, the driving component 6 is controlled to move, and the driving component 6 pulls the second rail trolley 5 to move toward the first rail trolley 4; the second rail trolley 5 drives the first rail trolley 4 to move synchronously to the disassembly position;

[0074] Step S2: Control the first lifting component 41 and the second lifting component 51 to descend to the disassembly height of the disassembly position, and disassemble the roll bending cylinder from the first lifting component 41 and the second lifting component 51;

[0075] Step S3: Replace the roll bending cylinder and install it 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 roll bending cylinder, and then raise the roll bending cylinder to the translation height;

[0076] Step S4: Control the driving component 6 to move, and the driving component 6 pulls the first rail trolley 4 to move toward the second rail trolley 5; the first rail trolley 4 drives the second rail trolley 5 to move synchronously to the installation position; it should be noted that the first rail trolley 4 and the second rail trolley 5 move synchronously to the disassembly position, and the first rail trolley 4 and the second rail trolley 5 move synchronously to the installation position, and the position of the driving component 6 is different in the two moving modes;

[0077] Step S5: Control the first lifting component 41 and the second lifting component 51 to descend to the installation height of the installation position, and after the bending roll cylinder cooperates 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.

[0078] The above method controls the action of the driving component 6, and the driving component 6 pulls the second rail trolley 5 toward the first rail trolley 4; the second rail trolley 5 drives the first rail trolley 4 to move synchronously to the disassembly position; then the first lifting component 41 and the second lifting component 51 are controlled to descend to the disassembly height of the disassembly position, which can be the height of the ground, and the bending cylinder is disassembled from the first lifting component 41 and the second lifting component 51 to complete the disassembly process, and finally the disassembled bending cylinder can be lifted out by the crane and placed in the spare parts area; replace the new bending cylinder, and install the new bending cylinder on the first lifting component 41 and the second lifting component 51, and after leveling the bending cylinder, the first lifting component 41 and the second lifting component 51 are used to lift the roller cylinder out of the disassembly position. Component 51 raises the roll bending cylinder to the translation height; controls the driving component 6 to move, and the driving component 6 pulls the first rail trolley 4 to move toward the second rail trolley 5; the first rail trolley 4 drives the second rail 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, and after the roll bending cylinder and the positioning key of the rolling mill are matched, the first lifting component 41 and the second lifting component 51 can be removed; the roll bending cylinder replacement method used in the hot rolling production line is easy to operate, and the entire lifting work of the roll bending cylinder is completed by the driving 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 roll bending cylinder, and improve the disassembly and assembly efficiency.

[0079] In a specific embodiment, the device and method for replacing a bending cylinder for a hot rolling production line provided by the present invention have the following operation process:

[0080] Use two 5t fall chains to hang them at two lifting points under the rolling mill platform just above the shaft connecting sleeve, lift the upper and lower shafts respectively, and open the shaft holder; flip the L-shaped hanging plate 2 180°, with the short side at the top and facing the rolling center line, align the φ75mm bolt holes with the M70mm bolt holes on the rolling mill arch, and use two M70*80mm bolts to fix the L-shaped hanging plate 2 to the rolling mill arch; then use the crane to lift the beam 3 in, align the 8 bolt holes reserved in the beam 3 with the 8 bolt holes of the L-shaped hanging plate 2, and then use 8 M24*100mm bolts to fix one end of the beam 3 to the hanging plate 2; the other end of the beam 3 is placed on the top of the door-type support frame 1, and use 4 M24*100mm bolts to connect and fix the beam 3 to the support frame 1, complete the tooling assembly, and make the whole set of tooling a solid whole.

[0081] Process of dismantling the roll bending cylinder: use the 5t fall chain as the first lifting component 41, hang it on the first rail trolley 4 on the inner side below the beam 3, and hang the hook bolt of the first lifting component 41 on the lifting point of the roll bending cylinder; use the 3t fall chain as the second lifting component 51, hang it on the second rail trolley 5 on the outer side below the beam 3, and hang the hook bolt on the lifting point outside the cylinder body of the roll bending cylinder; the first lifting component 41 and the second lifting component 51 are lifted at the same time, the first lifting component 41 lifts the roll bending cylinder, and the second lifting component 51 is adjusted to keep the roll bending cylinder horizontal ; Then, a 1t fall chain is used as a driving component 6, which is hung at the lifting point 81 of the gear base 8 below the crossbeam 3. The hook bolt of the driving component 6 is hung on the second rail trolley 5 above the second lifting component 51. The driving component 6 is pulled to pull the old bending roll cylinder out to a position outside the rolling mill arch where there is no obstruction for the crane to lift, i.e., the disassembly position. The first lifting component 41 and the second lifting component 51 are lowered to place the hydraulic cylinder securely on the ground, and the first lifting component 41 and the second lifting component 51 are removed; finally, the old bending roll cylinder is directly lifted out by the crane and placed in the spare parts area;

[0082] Installation process of the roll bending cylinder: First, use a crane to hoist the new roll bending cylinder under the beam 3, hang the hook bolt of the first lifting component 41 on the hoisting position of the new roll bending cylinder, hang the hook bolt of the second lifting component 51 on the lifting point outside the cylinder body of the new roll bending cylinder, lift the first lifting component 41 and the second lifting component 51 at the same time, lift the new roll bending cylinder to the installation height, adjust the second lifting component 51 to keep the new roll bending cylinder horizontal; then hang the 1t fall chain as the driving component 6 on the φ40mm lifting ring 31 at the end of the beam 3, and hang the hook bolt of the driving component 6 on the first rail trolley 4 above the first lifting component 41, as shown in the figure. Figure 2 As shown, the driving component 6 is pulled to pull the new roll bending cylinder into the arch to the installation position of the roll bending cylinder, and then the first lifting component 41 and the second lifting component 51 are used to cooperate with each other to adjust the height so that the positioning key groove of the new roll bending cylinder is aligned with the positioning key on the rolling mill arch, and finally the fixing bolts of the roll bending cylinder are installed and tightened;

[0083] After the bending roll cylinder is installed, remove and replace the tooling in sequence and test run;

[0084] After the test run is successful, the two 5T fall chains hanging the shaft sleeve are removed to complete the replacement of the bending roller cylinder.

[0085] The above is a detailed introduction to the bending cylinder replacement device and method for the hot rolling production line provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

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

2. The device for replacing a bending cylinder for a hot rolling production line according to claim 1, characterized in that: The support frame (1) comprises 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) via fasteners; and the cross beam (3) is mounted on the short beam (13).

3. The device for replacing a bending cylinder for a hot rolling production line according to claim 2, characterized in that: A lifting ring (31) is provided on an end surface of the crossbeam (3) which faces away from the support frame (1); the driving component (6) comprises a driving hook and a driving chain (61), the driving hook is mounted on the driving chain (61), and the driving hook is selectively hung on the first rail trolley (4) or the second rail trolley (5); When the roller bending cylinder is disassembled, the driving hook is hung on the second rail trolley (5), the fixed end of the driving chain (61) is hung on the hanging point (81) of the gear base (8), and the movable end of the driving chain (61) is pulled, so that the driving hook pulls the second rail trolley (5) to move toward the first rail trolley (4), and drives the first rail trolley (4) to move synchronously to the disassembly position; When the roller bending cylinder is installed, the driving hook is hung on the first rail trolley (4), and the fixed end of the driving chain (61) is hung on the lifting ring (31) of the crossbeam (3). When the movable end of the driving chain (61) is pulled, the hook of the driving component (6) pulls the first rail trolley (4) to move toward the second rail trolley (5), and drives the second rail trolley (5) to move synchronously to the installation position.

4. The device for replacing a bending roll cylinder for a hot rolling production line according to claim 2, characterized in that: The support frame (1) is a door-type 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 plurality of third assembly holes (111), the short beam (13) is an H-shaped steel, and a plurality of fourth assembly holes are provided at both ends of the short beam (13), and the third assembly holes (111) are connected to the fourth assembly holes by fasteners.

5. The device for replacing a bending cylinder for a hot rolling production line according to claim 1, characterized in that: The lower side of the cross beam (3) is provided with a slide groove (32), and the first rail trolley (4) and the second rail trolley (5) both include a first side roller (42) and a second side roller (43), and the first side roller (42) and the second side roller (43) are respectively movably arranged in the slide groove (32) on the lower side of the cross beam (3).

6. The device for replacing a bending cylinder for a hot rolling production line according to claim 1, characterized in that: The bottom of the first rail trolley (4) and the bottom of the second rail trolley (5) are both provided with a hanging ring (44); the first lifting component (41) and the second lifting component (51) both include a lifting hook and a lifting chain; and the maximum bearing capacity of the first lifting component (41) is greater than the maximum 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 rail trolley (4), and the lifting hook of the second lifting component (51) is detachably hung on the hanging ring (44) of the second rail trolley (5).

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

8. The bending cylinder replacement device for a hot rolling production line according to any one of claims 1 to 7, characterized in that: The hanging plate (2) is in an inverted L-shaped structure, the connecting plate (21) is fixedly arranged at the bottom of the short side of the hanging plate (2), and the hanging plate (2) extends in the vertical direction, and the connecting plate (21) extends in the horizontal direction, and a plurality of first assembly holes (211) are arranged on the connecting plate (21), and a plurality of second assembly holes are arranged on the top of the crossbeam (3) on a side away from the support frame (1), and the first assembly holes (211) and the second assembly holes are connected by fasteners.

9. The device for replacing a bending cylinder for a hot rolling production line according to claim 8, characterized in that: An I-beam (7) is welded and fixed to the top of the crossbeam (3); the length of the I-beam (7) is less than the length of the crossbeam (3); a side of the I-beam (7) facing away from the support frame (1) is provided with an avoidance inclined surface, and avoids the second assembly hole; and a plurality of reinforcing plates are arranged at intervals in the groove of the I-beam (7), and the reinforcing plates extend in the vertical direction.

10. A method for replacing a bending cylinder for a hot rolling production line, using the bending cylinder replacement device for a hot rolling production line according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1: judging the state of the roll bending cylinder, and when the roll bending cylinder needs to be disassembled, hanging the first lifting component and the second lifting component on the lifting point of the roll bending cylinder, controlling the driving component (6) to move, the driving component (6) pulling the second rail trolley (5) toward the first rail trolley (4); the second rail trolley (5) drives the first rail trolley (4) to move synchronously to the disassembly position; Step S2: controlling the first lifting component (41) and the second lifting component (51) to descend to the disassembly height of the disassembly position, and disassembling the roller bending cylinder from the first lifting component (41) and the second lifting component (51); Step S3: replacing the roll bending cylinder and installing the roll bending cylinder on the first lifting component (41) and the second lifting component (51), operating the first lifting component (41) and the second lifting component (51), leveling the roll bending cylinder, and then raising the roll bending cylinder to a translation height; Step S4: controlling the driving component (6) to move, the driving component (6) pulling the first rail trolley (4) to move toward the second rail trolley (5); the first rail trolley (4) drives the second rail trolley (5) to move synchronously to the installation position; Step S5: Control the first lifting component (41) and the second lifting component (51) to descend to the installation height of the installation position, and after the bending roll cylinder cooperates 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.

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