Annealing furnace cooling section roller shaft lifting device

Abstract

The present application belongs to annealing equipment maintenance technical field, especially to a kind of annealing furnace cooling section roller shaft lifting device, cooling section shell transmission side and operation side two sides front and back long circular hole correspond, cooling section shell long circular hole outside respectively fixed sealing mechanism, long circular hole is set in the lower part of sealing mechanism, outside respectively sliding connection lifting mechanism, first roller shaft, second roller shaft two ends are fixed with lifting mechanism respectively, the first roller shaft, second roller shaft shaft end of transmission side is respectively connected universal shaft, universal shaft is respectively connected power mechanism, lifting mechanism bottom end is respectively connected with suspender mechanism, suspender mechanism bottom end is respectively connected with screw lifting mechanism, between transmission side and operation side screw lifting mechanism between between respectively connect synchronous shaft, screw lifting mechanism connects safety coupling, safety coupling connects driving mechanism.The device completes the first roller shaft, second roller shaft rises or falls, is convenient for roller shaft overhaul and maintenance, avoids sudden fracture or damage to cause unit shutdown.

Description

Technical Field

[0001] This invention belongs to the field of annealing equipment maintenance technology, and particularly relates to a roller lifting device for the cooling section of an annealing furnace. Background Technology

[0002] The annealing furnace process is divided into a preheating section, a heating section, and a cooling section. Strip steel is transported via rollers in the annealing furnace. After entering the heating furnace, the strip steel undergoes annealing to eliminate internal stress in the hot-rolled steel plate. The surface temperature of the strip steel transported from the heating section is high, requiring cooling treatment to lower the temperature to a suitable range before it can continue to be transported to subsequent processes via rollers. At the outlet of the heating section and the inlet of the cooling section, cooling water is sprayed onto the strip steel, causing a rapid drop in surface temperature. The conveyor roller bearings in this area are subjected to drastic temperature changes, resulting in harsh working conditions, a short equipment lifespan, and a high replacement frequency. Furthermore, sudden breakage or damage to the roller equipment can easily cause unit shutdowns. Summary of the Invention

[0003] The purpose of this invention is to provide a roller lifting device for the cooling section of an annealing furnace, which solves the problem that the conveyor roller equipment in the spray area is subjected to drastic temperature changes due to alternating hot and cold conditions, harsh on-site working conditions, short equipment service life, and easy shutdown of the unit when sudden breakage or damage occurs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A roller lifting device for the cooling section of an annealing furnace includes a power mechanism, a first roller, a second roller, a sealing mechanism, a lifting mechanism, a boom mechanism, a screw lifting mechanism, a synchronous shaft, and a drive mechanism. The cooling section housing has elongated oval holes on its front and rear sides of both the transmission and operation sides. The elongated oval holes on the front and rear sides of the transmission and operation sides correspond to each other. A sealing mechanism is fixed to the outer side of each elongated oval hole in the cooling section housing. An elongated oval hole is opened in the lower center of each sealing mechanism, with the inner diameter of the hole being larger than the outer diameter of the first and second rollers. A lifting mechanism is slidably connected to the outer side of each sealing mechanism. A circular hole is opened in the middle of each lifting mechanism, with the inner diameter of the hole slightly larger than the outer diameter of the first and second rollers. The two ends of the first and second rollers pass through the elongated oval holes in the cooling section housing, the sealing mechanism, and the lifting mechanism, respectively, and are fixed to the lifting mechanism. The ends of the first and second rollers on the transmission side are respectively... A universal joint is connected, which is retractable. The universal joint is connected to the power mechanism. The bottom of the lifting mechanism is connected to the boom mechanism. The bottom of the boom mechanism is connected to the screw lifting mechanism. The screw lifting mechanisms are all mounted on the side wall brackets of the housing. On the outer wall of the cooling section housing, upper and lower limit switches are respectively provided on the side of the front and rear screw lifting mechanisms on the transmission and operation sides. Synchronous shafts are connected between the front and rear screw lifting mechanisms on the transmission and operation sides. The transmission side screw lifting mechanism is connected to the synchronous shaft through a transmission side coupling. The operation side screw lifting mechanism is connected to the synchronous shaft through an operation side coupling. The transmission side screw lifting mechanism is connected to the safety coupling. The safety coupling is connected to the drive mechanism. The drive mechanism is located below the transmission side of the cooling section housing and is mounted on the bracket below the housing.

[0005] Preferably, the sealing mechanism includes a base plate with an elongated oval hole at the lower center and bolt holes on both sides. The base plate is fixed to the cooling section housing via the bolt holes. A left guide rail and a right guide rail are symmetrically fixed along the center line on the outer side of the base plate. A stop support is fixed at the top of the left and right guide rails on the base plate. A stop support pin hole is provided in the middle of the bottom of the stop support. Threaded through holes are provided at the upper and lower parts of the sides of the left and right guide rails for installing pulley assemblies via bolts. A sealing door is provided around the outer ring of the elongated oval hole, forming a closed loop along its entire length. The sealing door is filled with sealing felt, the depth of which is greater than the depth of the sealing door, so that the other side of the sealing felt fits against the back of the lifting mechanism. Small circular through holes are provided at intervals around the perimeter of the sealing door for fixing the sealing felt inside the sealing door via pins. A pin hole is provided at the upper center line of the base plate for fixing the pin.

[0006] Preferably, the pulley assembly includes a wheel axle, one end of which is connected to the pulley and relies on the pulley for rolling and pressing, and the other end has an external thread that passes through the through holes on the side of the left and right guide rails, and is fixed to the left and right guide rails with a nut.

[0007] Preferably, the lifting mechanism includes a backing plate, the two end faces of which abut against the left and right guide rails respectively. An oil groove is provided at the abutment point to facilitate smoother vertical lifting and sliding by adding grease. A circular hole is formed in the center of the backing plate. A sealing plate is bolted to the outer side of the backing plate. The sealing plate is annular and made of thin steel plate. The inner diameter of the sealing plate is only slightly different from the outer diameter of the roller. The circular hole in the backing plate, the range of position change of the circular hole during lifting, and the size of the sealing plate are all smaller than the size of the sealing door, ensuring a tight fit between the sealing felt inside the sealing door and the back of the base plate. Sliding grooves are formed at both ends of the outer side of the backing plate to accommodate pulleys, facilitating the rolling of the pulleys within the grooves. The outer side of the backing plate is horizontally positioned above the sealing plate. A support plate is connected, and a bearing seat is suspended below the support plate by bolts. The bearing seats are connected to the two ends of the first roller shaft and the second roller shaft by bearings. The upper surface of the support plate is vertically fixed at both ends. Two pin holes are provided on the upper center line of the support plate, which are arranged at the top and bottom according to the distance of the lifting stroke. The bottom of the support plate is provided with a first mounting seat, which is composed of steel plates welded to the front and rear sides of the support plate. The lower part of the steel plate is provided with a pin hole for the insertion of the pin. The top and upper part of the center line of the support plate are provided with a support plate pin hole. The centers of the bottom plate pin hole, the support plate pin hole, and the stop support pin hole are aligned vertically in a straight line. The bottom of the front and rear support plates on the operating side and the transmission side are respectively connected to a limit bracket.

[0008] Preferably, the boom mechanism includes a first fork, a shaft, a boom, and a second fork. One end of the shaft is provided with an external thread. The boom is made of thick-walled hollow steel pipe. The spherical bearing at the top of the first fork is inserted into the first mounting seat at the bottom of the lifting mechanism via a pin. The bottom end of the first fork is connected to the shaft via a thread. The bottom end of the shaft is inserted into the top of the boom and welded. The bottom end of the boom is fixed to the second mounting seat. The spherical bearing at the top of the second fork is inserted into the second mounting seat via a pin.

[0009] Preferably, the screw lifting mechanism includes a horizontal drive shaft and a vertical drive shaft. The top end of the vertical drive shaft is threadedly connected to the bottom end of the second fork head. The right end of the horizontal drive shaft of the transmission-side screw lifting mechanism and the left end of the horizontal drive shaft of the operation-side screw lifting mechanism are respectively connected to the two ends of the synchronous shaft through couplings. The left end of the horizontal drive shaft of the transmission-side screw lifting mechanism is connected to a safety coupling.

[0010] Preferably, the synchronous shaft adopts a telescopic structure, comprising a first shaft body and a second shaft body, both of which are steel pipes slidably connected. The first shaft body is located near the transmission side, and a through-slot is provided at one end of the first shaft body near the second shaft body. A plug-in shaft is provided at one end of the second shaft body near the first shaft body. The outer diameter of the plug-in shaft is slightly smaller than the inner diameter of the steel pipe of the shaft body, so that it can be inserted into the inner wall of the first shaft body. A stop pin is welded to the position of the groove on the surface of the plug-in shaft, which engages in the groove of the first shaft body. The plug-in shaft can slide horizontally inside the first shaft body, and the rotational motion is transmitted by the stop pin on the surface of the plug-in shaft.

[0011] Preferably, the cross-sections of the left and right guide rails are both L-shaped.

[0012] Preferably, the first or second roller shaft is a spare roller shaft.

[0013] Preferably, both the power mechanism and the drive mechanism are geared motors.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: (1) The transmission side screw lifting mechanism is driven to rotate by the drive mechanism and safety coupling, and the operating side screw lifting mechanism is driven to rotate together by the synchronous shaft. The transmission side screw lifting mechanism and the operating side screw lifting mechanism drive the corresponding boom mechanism and lifting mechanism to rise or fall, so as to complete the rise or fall of the first roller shaft and the second roller shaft, realize the smooth interchange of the state of the first roller shaft or the second roller shaft, facilitate the inspection and maintenance of the roller shaft, and avoid the unit shutdown event caused by sudden breakage or damage; (2) The use of a retractable universal joint can not only transmit a large torque, but also extend and retract during the lifting and lowering of the roller shaft, thus meeting the equipment's usage requirements; (3) Fix a sealing mechanism on the outside of the cooling section housing on the transmission side and the operating side to prevent the sprayed cooling water from being thrown outward along the gap between the roller and the housing, thus preventing environmental pollution and damage to surrounding electrical equipment. (4) The pulleys of the pulley assembly press against the back plate of the lifting mechanism, which not only avoids derailment during the lifting process, but also reduces friction by rolling friction, so that the lifting action is unobstructed. (5) By utilizing the round hole of the back plate, the range of change of the position of the round hole during lifting, and the size of the sealing plate being smaller than the sealing door of the sealing mechanism, the sealing felt inside the sealing door is tightly fitted to the back of the back plate of the lifting mechanism to prevent a large amount of gas and water from leaking out of the housing. (6) The synchronous shaft is divided into a first shaft and a second shaft, and a sliding connection is adopted to compensate for the horizontal displacement caused by temperature difference. At the same time, the rotational motion is transmitted by the stop pin on the surface of the plug shaft, so that the disconnected first shaft and second shaft rotate synchronously, ensuring that the rollers on the transmission side and the operation side rise and fall at the same time, preventing the rollers from tilting and causing the strip steel to deviate from the center line and thus damaging the conveying equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a front view of the structure according to an embodiment of the present invention; Figure 3 This is a right view of the structure of an embodiment of the present invention; Figure 4 These are the front view and sectional view of the sealing mechanism in the structure of the embodiment of the present invention; Figure 5 These are the front view and left view of the lifting mechanism in the structure of the embodiment of the present invention; Figure 6 This is a schematic diagram showing the connection relationship between the sealing mechanism, the lifting mechanism, and the boom mechanism in the structure of an embodiment of the present invention; Figure 7 This is a schematic diagram of the synchronous shaft in an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached drawings: 1. Power mechanism; 2. First roller shaft; 3. Second roller shaft; 4. Sealing mechanism; 41. Base plate; 42. Oblong hole; 43. Left guide rail; 44. Right guide rail; 45. Sealing door; 46. Sealing felt; 47. First pin shaft; 48. Pin shaft hole in the base plate; 5. Lifting mechanism; 51. Backing plate; 52. Oil trough; 53. Sealing plate; 54. Slide groove; 55. Support plate; 56. Vertical plate; 57. First mounting base; 58. Pin shaft hole in the backing plate; 6. Lifting rod mechanism; 61. First fork head; 62. Shaft head; 63. Lifting rod; 64. First... 65. Second mounting base; 7. Screw lifting mechanism; 8. Synchronous shaft; 81. First shaft body; 82. Second shaft body; 83. Insert shaft; 84. Through-slot; 85. Stop pin; 9. Drive mechanism; 10. Universal joint; 11. Safety coupling; 12. Stop support; 13. Pulley assembly; 131. Wheel and axle; 132. Pulley; 133. Nut; 14. Bearing seat; 15. Housing; 16. Limit bracket; 17. Upper limit switch; 18. Lower limit switch; 19. Transmission side coupling; 20. Operating side coupling. Detailed Implementation

[0017] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-3As shown, a roller lifting device for the cooling section of an annealing furnace includes a power mechanism 1, a first roller 2, a second roller 3, a sealing mechanism 4, a lifting mechanism 5, a boom mechanism 6, a screw lifting mechanism 7, a synchronous shaft 8, and a drive mechanism 9. The cooling section housing 15 has elongated oval holes on its front and rear sides of both the transmission and operation sides, with the elongated oval holes on both sides corresponding to each other. Sealing mechanisms 4 are fixed to the outer sides of the elongated oval holes on the cooling section housing 15. An elongated oval hole is opened in the lower center of the sealing mechanism 4, with the inner diameter of each hole larger than the outer diameter of the first roller 2 and the second roller 3. A lifting mechanism is slidably connected to the outer side of the sealing mechanism 4. The lifting mechanism 5 has a circular hole in its middle, the inner diameter of which is slightly larger than the outer diameter of the first roller 2 and the second roller 3. The two ends of the first roller 2 and the second roller 3 pass through the elongated holes of the cooling section housing 15, the sealing mechanism 4, and the circular hole of the lifting mechanism 5, respectively, and are fixed to the lifting mechanism 5. The first roller 2 or the second roller 3 is a spare roller. The shaft ends of the first roller 2 and the second roller 2 on the drive side are respectively connected to universal joints 10, which are retractable. The universal joints 10 are respectively connected to the power mechanism 1. The bottom end of the lifting mechanism 5 is respectively connected to the suspension rod mechanism 6, and the bottom end of the suspension rod mechanism 6 is respectively connected to the screw lifting mechanism 7. All screw lifting mechanisms 7 are mounted on the side wall supports of the housing 15. Upper limit switches 17 and lower limit switches 18 are respectively installed on the upper and lower sides of the front and rear screw lifting mechanisms on the transmission and operation sides of the outer wall of the cooling section housing 15, respectively. Synchronous shafts 8 are connected between the front and rear screw lifting mechanisms 7 on the transmission and operation sides, respectively. The transmission-side screw lifting mechanism 7 is connected to the synchronous shaft 8 via a transmission-side coupling 19, and the operation-side screw lifting mechanism 7 is connected to the synchronous shaft 8 via an operation-side coupling 20. Safety couplings 11 are connected to the transmission-side screw lifting mechanisms 7. Coupling 11 connects to drive mechanism 9, which is located below the transmission side of cooling section housing 15. Drive mechanism 9 uses a gear motor, which is mounted on a bracket below housing 15. The drive mechanism and safety coupling drive the transmission side screw lifting mechanism to rotate, and together with the synchronous shaft, drive the operating side screw lifting mechanism to rotate. The transmission side screw lifting mechanism and the operating side screw lifting mechanism drive the corresponding boom mechanism and lifting mechanism to rise or fall, completing the rise or fall of the first roller shaft and the second roller shaft, which facilitates the maintenance and state exchange of the first roller shaft or the second roller shaft.

[0019] like Figure 4-7As shown, the sealing mechanism 4 includes a base plate 41 with an elongated oval hole 42 at its lower center. Bolt holes are provided on both sides of the base plate 41, and the base plate 41 is fixed to the cooling section housing 15 through the bolt holes. A left guide rail 43 and a right guide rail 44 are symmetrically fixed along the center line on the outer side of the base plate 41. The cross-sections of the left guide rail 43 and the right guide rail 44 are both L-shaped. A stop support 12 is fixed on the base plate 41 at the top of the left guide rail 43 and the right guide rail 44. A stop support pin hole is provided in the middle of the bottom of the stop support 12. At the same time, threaded through holes are provided on the upper and lower parts of the sides of the left guide rail 43 and the right guide rail 44. A pulley assembly 13 is installed by bolts. A sealing door 45 is provided around the outer ring of the elongated oval hole, and its entire length is closed along the elongated oval hole. The interior of the sealing door 45 is filled with sealing felt. 46. ​​The sealing felt 46 is deeper than the sealing door 45, so that the other side of the sealing felt 46 fits against the back of the lifting mechanism 5, achieving a good sealing effect. Small circular through holes are provided at intervals around the perimeter of the sealing door 45. The sealing felt 46 is fixed inside the sealing door 45 by the first pin 47. A bottom plate pin hole 48 is provided on the upper part of the center line of the bottom plate 41 for fixing the pin. The pulley assembly 13 includes a wheel axle 131. One end of the wheel axle 131 is connected to the pulley 132 and rolls and presses against it by the pulley 132. The other end has an external thread and passes through the through holes on the side of the left guide rail 43 and the right guide rail 44. It is fixed to the left guide rail 43 and the right guide rail 44 by a nut 133. The lifting mechanism 5 includes a backing plate 51. The two end faces of plate 51 abut against the left guide rail 43 and the right guide rail 44 respectively, with an oil groove 52 at the abutment. A round hole is opened in the middle of the back plate 51. The outer side of the back plate 51 is connected to the sealing plate 53 by bolts. The sealing plate 53 is annular and made of thin steel plate. The inner diameter of the sealing plate 53 is only slightly different from the outer diameter of the roller. The round hole of the back plate 51, the range of change of the position of the round hole during lifting, and the size of the sealing plate 53 are all smaller than the size of the sealing door 45, so that the sealing felt 46 inside the sealing door 45 fits tightly against the back of the bottom plate 41. The two ends of the outer side of the back plate 51 are provided with grooves 54 to cooperate with the pulleys 132, so that the pulleys 132 can roll in the grooves 54. The outer side of the back plate 51 is horizontally connected to the support plate 55 above the sealing plate 53. The support plate 55 is connected to the bottom of the support plate 55 by bolts. The bearing housing 14 is suspended, and the two ends of the first roller shaft 2 and the second roller shaft 3 are connected to the bearing housing 14 through bearings. The two ends of the upper surface of the support plate 55 are vertically fixed to the upright plate 56. The upper center line of the back plate 51 is provided with two pin holes at the top and bottom, which are arranged according to the distance of the lifting stroke. The bottom of the back plate 51 is provided with a first mounting seat 57, which is composed of steel plates welded to the front and rear sides of the back plate. The lower part of the steel plate is provided with a pin hole for the pin to be inserted. The top and upper part of the center line of the back plate 51 are provided with a back plate pin hole 58 for fixing the pin. The center of the bottom plate pin hole 48, the back plate pin hole 58, and the stop support pin hole of the stop support 12 are coincident in a straight line along the vertical direction. The bottom of the front and rear back plates 51 on the operating side and the transmission side are respectively connected to the limit bracket 16.By pressing the pulley against the backing plate, and with the left and right guide rails abutting the end face of the backing plate, combined with the sliding grooves on the outer side of the backing plate and the grease added to the oil groove, the vertical lifting and sliding motion is smoother. The L-shaped pulleys on the left and right guide rails facilitate pressing, not only preventing the guide rails from detaching during lifting, but also reducing friction through rolling friction, ensuring unobstructed lifting action. The pin holes on the sealing mechanism's base plate, the lifting mechanism's backing plate, and the stop support are aligned on a straight line. The lifting mechanism is fixed to the sealing mechanism by a pin passing through these pin holes, reducing the stress on the lifting rod mechanism.

[0020] like Figure 3 As shown, the boom mechanism 6 includes a first fork head 61, a shaft head 62, a boom 63, and a second fork head 64. One end of the shaft head 62 is provided with an external thread. The boom 63 is made of thick-walled hollow steel pipe. The spherical bearing at the top of the first fork head 61 is inserted into the first mounting seat 57 at the bottom of the lifting mechanism 5 via a pin. The bottom end of the first fork head 61 is connected to the shaft head 62 via a thread. The bottom end of the shaft head 62 is inserted into the top of the boom 63 and welded. The bottom end of the boom 63 is fixed to the second mounting seat 65. The spherical bearing at the top of the second fork head 64 is connected to the second mounting seat 64 via a pin. 5. Plug-in connection; The screw lifting mechanism 7 includes a horizontal drive shaft and a vertical drive shaft. The top end of the vertical drive shaft is threadedly connected to the bottom end of the second fork head 64. The right end of the horizontal drive shaft of the transmission side screw lifting mechanism and the left end of the horizontal drive shaft of the operation side screw lifting mechanism are connected to the two ends of the synchronous shaft 8 through the transmission side coupling 19 and the operation side coupling 20, respectively. The left end of the horizontal drive shaft of the transmission side screw lifting mechanism is connected to the safety coupling 11. The lifting rod is made of thick-walled hollow steel pipe, which can save materials and play a transition support role.

[0021] like Figure 7 As shown, the synchronous shaft 8 adopts a telescopic structure. The synchronous shaft includes a first shaft body 81 and a second shaft body 82. Both the first shaft body 81 and the second shaft body 82 are steel pipes and are slidably connected. The first shaft body 81 is closer to the transmission side. The end of the first shaft body 81 near the second shaft body 82 is provided with a through-slot 84. The end of the second shaft body 82 near the first shaft body 81 is provided with a plug-in shaft 83. The outer diameter of the plug-in shaft 83 is slightly smaller than the inner diameter of the steel pipes of the first shaft body 81 and the second shaft body 82, so that it can be inserted into the inner wall of the first shaft body 81. A stop pin 85 is welded to the position of the groove on the surface of the plug-in shaft 83, which is engaged in the groove of the first shaft body 81. The plug-in shaft 83 can slide horizontally inside the first shaft body 81. The sliding connection of the first shaft body and the second shaft body compensates for the horizontal displacement caused by temperature difference. At the same time, the rotational motion is transmitted by the stop pin on the surface of the plug-in shaft, so that the disconnected first shaft body and the second shaft body rotate synchronously.

[0022] Working principle: The strip steel is transported by rollers in the annealing furnace process section. The levelness of the rollers must be ensured. When the rollers are tilted, the strip steel is easily deviated from the center line and thus damaged the conveying equipment. In this embodiment, the first roller 2 is the working roller, and the second roller 3 is the standby roller. When the working roller needs to be repaired or replaced, the standby roller is raised from the low position to the high position. It is required that the roller shaft ends on the transmission side and the roller shaft ends on the operation side move upward synchronously. The drive mechanism of the standby roller shaft is activated. Its drive mechanism 9 gear motor drives the horizontal transmission shaft of the transmission-side screw lifting mechanism 7 through the safety coupling 11. The horizontal transmission shaft drives the synchronous shaft 8 to rotate through the transmission-side coupling 19. The synchronous shaft 8 drives the horizontal transmission shaft of the operating-side screw lifting mechanism 7 to rotate, so that the transmission-side horizontal transmission shaft and the operating-side horizontal transmission shaft simultaneously drive their corresponding vertical transmission shafts to rotate, thereby driving the boom mechanism 6 to rise. The boom mechanism 6 drives the support plate 51 of the lifting mechanism 5 to move upward. The outer side of the support plate 51 is pressed against by the pulley 132 of the pulley assembly 13, which not only prevents it from falling off the guide rail during the lifting process, but also reduces the friction force by rolling friction, so that the lifting action is unobstructed. When the support plate 51 rises to the high position, the support plate 51 is inserted into the gap between the left guide rail 43, the right guide rail 44 and the stop support 12. When the limit bracket 16 at the bottom of the support plate 51 of the lifting mechanism 5 senses the upper limit switch 17, the standby roller shaft reaches the working state and starts to be put into production operation. At this time, the drive mechanism, which was originally in the high-position working state, rotates in the opposite direction, causing the working roller shaft to descend until it reaches the low-position standby state. When the limit bracket 16 at the bottom of the support plate 51 of the lifting mechanism 5 senses the lower limit switch 18, the working roller shaft reaches the standby state, realizing the interchangeable working state of the two rollers. This does not affect the normal operation of the equipment, and it also allows for the repair of defective equipment, thereby improving production efficiency.

[0023] The cooling of the strip steel in the cooling section adopts an air-cooling plus water-cooling process. Especially in the water cooling section, the sprayed cooling water can be thrown outward through the gap between the roller and the shell, which not only causes pollution to the on-site environment, but also poses a risk of burning out the surrounding electrical equipment. By utilizing the sealing door 45 and the sealing felt 46, which are deeper than the sealing door 45, the other side of the sealing felt 46 can better fit against the back of the back plate 51 in the lifting mechanism 5. The sealing felt 46 is fixed inside the sealing door 45 by a pin to prevent the consumption and leakage of energy medium.

[0024] When the screw lifting mechanism 7 is in the high or low position, the centers of the bottom plate pin hole 48 of the sealing mechanism 4, the back plate pin hole 58 of the lifting mechanism 5, and the stop support pin hole are aligned on a straight line. The fixing pin passes through the three pin holes, fixing the lifting mechanism 5 to the sealing mechanism 4, preventing the boom mechanism 6 from supporting the lifting mechanism 5 for a long time and extending the service life of the equipment. The upright plate 56 not only acts as a reinforcing rib, but its height is also slightly lower than the bottom surface of the stop support 12. When the upper limit switch 17 or the lower limit switch 18 malfunctions, the upper surface of the upright plate 56 presses against the lower surface of the stop support 12. At this time, the upward resistance is relatively large. When it exceeds the output torque of the screw lifter in the screw lifting mechanism 7, the safety coupling 11 at the output end of the gear motor automatically disconnects, and the output end stops rotating. This prevents the gear motor from driving the screw lifter in the screw lifting mechanism 7 to rise continuously, causing the screw of the screw lifter to exceed its own stroke and thus damage the screw lifter.

Claims

1. A roller lifting device for the cooling section of an annealing furnace, characterized in that, The system includes a power mechanism, a first roller shaft, a second roller shaft, a sealing mechanism, a lifting mechanism, a boom mechanism, a screw lifting mechanism, a synchronous shaft, and a drive mechanism. The cooling section housing has elongated oval holes on the front and rear of both the transmission and operating sides. These elongated oval holes correspond to each other on both sides. Sealing mechanisms are fixed to the outer sides of the elongated oval holes in the cooling section housing. An elongated oval hole is opened in the lower center of each sealing mechanism, with the inner diameter of the hole being larger than the outer diameter of the first and second roller shafts. Lifting mechanisms are slidably connected to the outer sides of the sealing mechanisms. A circular hole is opened in the middle of the lifting mechanism, with the inner diameter slightly larger than the outer diameter of the first and second roller shafts. The two ends of the first and second roller shafts pass through the elongated oval holes in the cooling section housing, the sealing mechanism, and the lifting mechanism, respectively, and are fixed to the lifting mechanism. Universal joints are connected to the ends of the first and second roller shafts on the transmission side. The universal joint is retractable and connected to the power mechanism. The bottom of the lifting mechanism is connected to the boom mechanism, and the bottom of the boom mechanism is connected to the screw lifting mechanism. The screw lifting mechanisms are all mounted on the side wall brackets of the housing. On the outer wall of the cooling section housing, upper and lower limit switches are respectively provided on the side of the front and rear screw lifting mechanisms on the transmission and operation sides. Synchronous shafts are connected between the front and rear screw lifting mechanisms on the transmission and operation sides. The transmission side screw lifting mechanism is connected to the synchronous shaft through a transmission side coupling, and the operation side screw lifting mechanism is connected to the synchronous shaft through an operation side coupling. The transmission side screw lifting mechanism is connected to the safety coupling, and the safety coupling is connected to the drive mechanism. The drive mechanism is located below the transmission side of the cooling section housing and is mounted on the bracket below the housing.

2. The roller lifting device for the cooling section of an annealing furnace according to claim 1, characterized in that, The sealing mechanism includes a base plate with an elongated oval hole at the bottom center and bolt holes on both sides. The base plate is fixed to the cooling section housing via the bolt holes. A left and right guide rail are symmetrically fixed along the center line on the outer side of the base plate. A stop support is fixed at the top of the left and right guide rails on the base plate. A stop support pin hole is provided at the bottom center of the stop support. Threaded through holes are provided at the upper and lower parts of the sides of the left and right guide rails for installing pulley assemblies via bolts. A sealing door is provided around the outer ring of the elongated oval hole, forming a closed loop along its entire length. The sealing door is filled with sealing felt, the depth of which is greater than the depth of the sealing door, so that the other side of the sealing felt fits against the back of the lifting mechanism. Small circular through holes are provided at intervals around the perimeter of the sealing door for fixing the sealing felt inside the sealing door via pins. A pin hole is provided at the upper center line of the base plate for fixing the pin.

3. The roller lifting device for the cooling section of an annealing furnace according to claim 2, characterized in that, The pulley assembly includes a wheel axle. One end of the wheel axle is connected to the pulley, which rolls and presses against it. The other end has an external thread that passes through the through holes on the sides of the left and right guide rails and is fixed to the left and right guide rails with a nut.

4. The roller lifting device for the cooling section of an annealing furnace according to claim 3, characterized in that, The lifting mechanism includes a backing plate, whose two end faces abut against the left and right guide rails respectively. Oil grooves are provided at the abutment points to facilitate smoother vertical movement by adding grease. A circular hole is formed in the center of the backing plate, and a sealing plate is bolted to the outer side of the backing plate. The sealing plate is annular and made of thin steel plate, with a small difference between its inner diameter and the outer diameter of the roller. The circular hole in the backing plate, the range of position change during lifting, and the size of the sealing plate are all smaller than the size of the sealing door, ensuring a tight fit between the sealing felt inside the sealing door and the back of the base plate. Sliding grooves are formed at both ends of the outer side of the backing plate to accommodate pulleys, facilitating the rolling of the pulleys within the grooves. The outer side of the backing plate is horizontally connected above the sealing plate. The support plate has a bearing seat suspended by bolts below it. The bearing seat is connected to the two ends of the first and second roller shafts through bearings. The upper surface of the support plate is vertically fixed at both ends. Two pin holes are provided on the upper center line of the support plate, which are arranged at the top and bottom to match the lifting stroke. The bottom of the support plate is provided with a first mounting seat, which is composed of steel plates welded to the front and rear sides of the support plate. The lower part of the steel plate is provided with a pin hole for pin insertion. There are support plate pin holes at the top and top of the center line of the support plate. The centers of the bottom plate pin holes, support plate pin holes, and stop support pin holes are aligned vertically in a straight line. Limit brackets are connected to the bottom of the front and rear support plates on the operating side and the transmission side, respectively.

5. The roller lifting device for the cooling section of an annealing furnace according to claim 1, characterized in that, The boom mechanism includes a first fork, a shaft, a boom, and a second fork. One end of the shaft is provided with an external thread. The boom is made of thick-walled hollow steel pipe. The spherical bearing at the top of the first fork is inserted into the first mounting seat at the bottom of the lifting mechanism via a pin. The bottom end of the first fork is connected to the shaft via a thread. The bottom end of the shaft is inserted into the top of the boom and welded. The bottom end of the boom is fixed to the second mounting seat. The spherical bearing at the top of the second fork is inserted into the second mounting seat via a pin.

6. The roller lifting device for the cooling section of an annealing furnace according to claim 1, characterized in that, The screw lifting mechanism includes a horizontal drive shaft and a vertical drive shaft. The top end of the vertical drive shaft is threadedly connected to the bottom end of the second fork head. The right end of the horizontal drive shaft of the transmission-side screw lifting mechanism and the left end of the horizontal drive shaft of the operation-side screw lifting mechanism are respectively connected to the two ends of the synchronous shaft through couplings. The left end of the horizontal drive shaft of the transmission-side screw lifting mechanism is connected to a safety coupling.

7. The roller lifting device for the cooling section of an annealing furnace according to claim 1, characterized in that, The synchronous shaft adopts a telescopic structure, comprising a first shaft body and a second shaft body, both of which are steel pipes slidably connected. The first shaft body is closer to the transmission side, and a through-slot is provided at one end of the first shaft body near the second shaft body. A plug-in shaft is provided at one end of the second shaft body near the first shaft body. The outer diameter of the plug-in shaft is slightly smaller than the inner diameter of the steel pipe of the shaft body, so that it can be inserted into the inner wall of the first shaft body. A stop pin is welded to the position of the groove on the surface of the plug-in shaft, which engages in the groove of the first shaft body. The plug-in shaft can slide horizontally inside the first shaft body, and the rotational motion is transmitted by the stop pin on the surface of the plug-in shaft.

8. The roller lifting device for the cooling section of an annealing furnace according to claim 1, characterized in that, Both the left and right guide rails have L-shaped cross-sections.

9. The roller lifting device for the cooling section of an annealing furnace according to claim 1, characterized in that, The first or second roller shaft is a spare roller shaft.

10. The roller lifting device for the cooling section of an annealing furnace according to claim 1, characterized in that, Both the power mechanism and the drive mechanism are geared motors.

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