Continuous annealing equipment and annealing process for round steel bar annealing

Abstract

The invention discloses continuous annealing equipment and an annealing process for round steel bar annealing, and relates to the technical field of metal heat treatment equipment and processes, the continuous annealing equipment comprises an annealing furnace barrel, an annealing box heating pipe and a base, one side face of the annealing furnace barrel is fixedly communicated with an annealing box, and a public self-driving assembly is arranged in the annealing box. The rotary cylinder and the supporting disc are driven through the public self-driving assembly, the round steel bars are kept to rotate synchronously before and after entering the annealing box, continuous circulation and rotary annealing are achieved, compared with traditional stacking annealing, the round steel bars on the inner side of a material pile can also fully absorb heat, and therefore the problems that temperature distribution is uneven, and temperature rise of part of the steel bars is too slow are solved; therefore, the uniform annealing effect of each round steel bar is guaranteed, the internal structure uniformity, the hardness stability and the subsequent machining performance of the product are remarkably improved, and the machining safety and reliability of the material are improved.

Description

Technical Field

[0001] This invention relates to the field of metal heat treatment equipment and process technology, and in particular to a continuous annealing equipment and annealing process for annealing round steel bars. Background Technology

[0002] After hot rolling or cold drawing, round steel bars typically exhibit residual stress and hardened structures, resulting in high hardness, brittleness, and poor machinability. For products such as lead-free wire rods, high-strength cord steel, gas-shielded steel, pipeline steel, and railway weathering welding wire, the material performance requirements are even higher. Without proper annealing, these materials are prone to fracture, deformation, or uneven processing during subsequent machining, stretching, or forming, affecting safety and performance stability. Annealing round steel bars to a suitable temperature and holding it for a certain time, followed by slow cooling, effectively eliminates internal stress, improves grain structure, reduces hardness, and enhances plasticity and toughness, thereby significantly improving the material's machinability and subsequent forming capabilities.

[0003] Currently, when annealing round steel bars, workers typically need to place each bar into an annealing furnace individually for stacking and annealing. However, during the annealing process, the stacked round steel bars are prone to uneven heating, with the bars located inside the stockpile heating up more slowly, making it difficult to guarantee the annealing effect. In addition, existing annealing furnaces cannot achieve continuous annealing of round steel bars, meaning that loading, annealing, and unloading cannot be automated, resulting in low efficiency and high labor intensity. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that in the prior art, when annealing round steel bars, workers usually need to put the round steel bars into the annealing furnace one by one for stacking and annealing. However, during the annealing process, the stacked round steel bars are prone to uneven heating, and the round steel bars located inside the material pile heat up more slowly, making it difficult to guarantee the annealing effect. At the same time, the existing annealing furnaces cannot realize continuous annealing operations for round steel bars, that is, the feeding, annealing and unloading cannot be automated, resulting in low efficiency and high labor intensity. Therefore, this invention proposes a continuous annealing equipment and annealing process for round steel bars.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A continuous annealing device for annealing round steel bars includes an annealing furnace cylinder, an annealing box, heating tubes, and a base. The annealing furnace cylinder is fixedly connected to the annealing box on one side. The annealing box is equipped with a dual-tube switching heating mechanism, which enables seamless replacement of heating tubes when changing heating tubes in the annealing box. A storage box is provided on one side of the annealing furnace cylinder to buffer the round steel bars to be annealed, and a discharge guide frame is provided on the opposite side of the storage box to discharge the annealed round steel bars. The annealing furnace cylinder has a rotating cylinder inside, and there are equidistant receiving cavities on the side wall of the rotating cylinder. A support plate is movably inserted into the receiving cavity and stores a single round steel bar. A common shaft is fixedly connected to the bottom of the support plate, and a self-capturing synchronization component is provided on the support plate. Before the round steel bar on the support plate reaches one side of the annealing box, the round steel bar is clamped, so that the support plate and the round steel bar rotate synchronously. The bottom of the common shaft is provided with a common self-driving component. The common self-driving component drives the round steel bars on the support plate to rotate continuously, and at the same time drives multiple support plates to rotate, so that the round steel bars entering the annealing box are annealed evenly.

[0006] Optionally, the self-capturing synchronization component includes a capturing arc rod, a follower rod, a vertical cylinder, and a position control mechanism. The vertical cylinder is sleeved on the outer wall of the common shaft, and a top ring is fixedly installed at the top of the common shaft. The capturing arc rod is rotatably connected to the top ring. The top of the support plate has a circular array of clearance grooves, and the capturing arc rod extends from inside the clearance grooves. A support arc block is fixedly installed on one side of the support plate in the receiving cavity. The middle position of the capturing arc rod is rotatably connected to one end of the follower rod, and the other end of the follower rod is rotatably connected to the outer wall of the vertical cylinder. The position control mechanism controls the capturing arc rod to clamp the round steel bar and drive it to rotate and anneal before it enters the annealing chamber. After the round steel bar leaves the annealing chamber, it is released, achieving automatic feeding.

[0007] Optionally, the position control mechanism includes a drive cylinder, an annular groove disc, and a synchronizing column. The annular groove disc is fixedly connected to the common shaft. A guide block is fixedly connected to the middle position of the synchronizing column. An intermediate rod is inserted into the guide block in a vertical direction. One end of the intermediate rod is fixedly connected to the bottom of the support arc block.

[0008] Optionally, the drive cylinder is fixedly connected to the top of the base. The top of the drive cylinder is sequentially provided with a bottom horizontal groove, a transition inclined groove, and a top horizontal groove. One end of the synchronizing column extends into the top of the drive cylinder, and the other end of the synchronizing column extends into the groove of the annular groove plate. A connecting rod is fixedly connected to the outer wall of the drive cylinder, and the top end of the connecting rod is fixedly connected to the outer wall of the annealing furnace cylinder.

[0009] Optionally, the common self-driving assembly includes a geared motor, a drive internal gear ring, a driven gear, and a timing disc. The output end of the geared motor is fixedly connected to an extension column, the top end of the extension column is fixedly connected to the bottom of the rotary drum, and the timing disc is concentrically fixedly connected to the extension column below the rotary drum.

[0010] Optionally, the bottom end of the common shaft is rotatably connected to the synchronous disk, a driven gear is fixedly connected to the bottom of the common shaft, the driven gear meshes with the inner wall of the drive internal gear ring, the drive internal gear ring has a smooth section below the storage box, and the drive internal gear ring is fixedly connected to the top of the base.

[0011] Optionally, the geared motor is fixedly connected to the bottom of the base, and the base is sequentially fixedly connected to a long support and a short support, the bottom of the long support and the bottom of the short support are both fixedly connected to the chassis.

[0012] Optionally, the dual-tube switching mechanism includes a mounting rod, a protruding block, and a temporary support assembly. When the heating tube is replaced in the annealing box, the temporary support assembly limits the standby heating tube within the annealing box. The annealing box has a mounting rod inserted vertically through it. The mounting rod has symmetrically opened mounting grooves on its side. The heating tube is fixedly connected to the mounting rod in the mounting groove. The protruding block is fixedly connected to the top of the mounting rod.

[0013] Optionally, the temporary support assembly includes a mounting block, a limiting block, and a limiting rod. The mounting block is fixedly connected to the outer wall of the annealing chamber. A central column is movably inserted into the mounting block in the vertical direction. A limiting block is fixedly connected to the bottom of the central column. Optionally, a limiting rod is rotatably connected to the top of the intermediate column, and a limiting frame is fixedly provided on the mounting block, with the limiting rod extending into the limiting frame.

[0014] An annealing process for round steel bars includes the following steps: In the feeding of round steel bars, the common self-driving component drives the rotary drum to rotate continuously, and the position control component controls the self-capturing component at the bottom of the storage box to retract below the support plate. Multiple round steel bars arranged in the storage box enter the receiving cavity one by one due to their own weight and flow continuously. In the annealing heating process of the round steel bar, the common self-driving component drives the rotary drum to rotate continuously. Before entering the annealing box, the position control component controls the self-capturing component at the bottom of the storage box to clamp and capture the round steel bar above the support plate. The support plate and the round steel bar rotate synchronously, and the round steel bar is annealed and heated evenly. During the furnace cooling and unloading of the round steel bars, the common self-driving component drives the rotary drum to rotate continuously. After the round steel bars are heated and removed from the annealing box, the position control component controls the self-capturing component at the bottom of the storage box to retract into the support plate. The support plate does not rotate synchronously with the round steel bars. When the round steel bars move to the side of the discharge guide frame, the round steel bars fall from the discharge guide frame due to their own weight.

[0015] Compared with the prior art, the present invention has the following advantages: 1. This invention uses a common self-driving component to drive the rotary drum and support plate, so that the round steel bars maintain synchronous rotation before and after entering the annealing chamber, achieving continuous flow and rotary annealing. Compared with traditional stacked annealing, the round steel bars on the inner side of the material pile can also fully absorb heat, thereby avoiding the problems of uneven temperature distribution and slow heating of some steel bars. This not only ensures the uniform annealing effect of each round steel bar, but also significantly improves the internal structure uniformity, hardness stability and subsequent processing performance of the product, and improves the processing safety and reliability of the material.

[0016] 2. This invention achieves fully automated control of the entire process of round steel bar loading, annealing, and unloading through the coordinated operation of a self-capturing synchronization component, a position control mechanism, and a common self-driving component. Workers no longer need to manually operate each round steel bar individually, saving manpower and reducing the risk of operational errors. Automated control also maintains the stability of the annealing process, improving production efficiency and equipment utilization, while reducing the impact of human factors on the annealing effect. This provides reliable process assurance for the mass production of lead-free wire rods, high-strength cord steel, pipeline steel, and railway weathering welding wire steel.

[0017] 3. This invention uses a single drive motor to simultaneously achieve the functions of support plate rotation, continuous flow of round steel bars, and synchronous rotary annealing. It works in conjunction with the annular groove plate, synchronous column, and position control mechanism to complete the clamping and releasing actions. This design not only reduces the number of power sources and energy consumption of the equipment, but also reduces mechanical complexity and failure rate. Compared with traditional multi-motor or manually driven annealing equipment, this annealing equipment achieves a compact structure and easy maintenance while ensuring performance, making it suitable for continuous production of high-requirement steel products.

[0018] 4. The annealing chamber of this invention is equipped with a dual-tube switching heating mechanism and a temporary support assembly, which allows the heating tubes to be quickly replaced or limited during the annealing process, avoiding furnace shutdown and operational safety hazards. This not only improves the flexibility and maintenance efficiency of the equipment, but also ensures the stability of the annealing temperature during continuous production, reducing product quality fluctuations caused by heating tube failures. For materials with strict requirements on annealing temperature, such as high-strength cord steel and gas-insulated steel, this design further improves product performance stability and production safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 for Figure 1 A schematic diagram of the structure after removing the top cover.

[0021] Figure 3 for Figure 1 Another perspective structural diagram.

[0022] Figure 4This is a schematic diagram of the internal components of an annealing furnace cylinder.

[0023] Figure 5 for Figure 4 A schematic diagram of the structure for removing the drive cylinder.

[0024] Figure 6 This is a schematic diagram of the specific structure of the drive cylinder.

[0025] Figure 7 This is a structural schematic diagram of the rotary drum and its connecting parts.

[0026] Figure 8 This is a schematic diagram of the self-capture synchronization component.

[0027] Figure 9 for Figure 8 Another perspective structural diagram.

[0028] Figure 10 for Figure 9 A schematic diagram of the structure after removing the supporting arc block.

[0029] Figure 11 This is a structural diagram of the annealing chamber and its connecting parts.

[0030] Figure 12 This is a structural diagram of a temporary support component.

[0031] Figure 13 This is a schematic diagram of a dual-tube switching heating mechanism.

[0032] In the diagram: 1. Top cover; 2. Annealing furnace cylinder; 3. Base; 4. Gear motor; 41. Extension column; 5. Chassis; 51. Long support frame; 52. Short support frame; 6. Rotary cylinder; 61. Receiving cavity; 7. Discharge guide frame; 8. Storage box; 9. Annealing box; 10. Mounting rod; 101. Protruding block; 102. Mounting groove; 11. Support arc block; 12. Intermediate rod; 13. Drive internal gear ring; 131. Smooth section; 14. Connecting rod; 15. Drive cylinder; 1 51. Bottom transverse groove; 152. Transition inclined groove; 153. Top transverse groove; 16. Synchronizing disc; 17. Guide block; 171. Synchronizing column; 18. Vertical cylinder; 19. Annular groove disc body; 20. Common shaft; 21. Driven gear; 22. Support disc; 220. Clearance groove; 23. Capturing arc rod; 24. Follower rod; 25. Top ring; 26. Mounting block; 261. Limiting frame; 27. Limiting rod; 28. Intermediate column; 29. ​​Limiting block; 30. Heating tube. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Reference Figures 1-13 A continuous annealing equipment and process for annealing round steel bars, comprising an annealing furnace cylinder 2, an annealing box 9, a heating tube 30, and a base 3, wherein the annealing furnace cylinder 2 is fixedly welded to one side of the annealing box 9. (See reference for details.) Figure 3 The annealing chamber 9 has a relatively large lateral width to accommodate multiple sets of heating tubes 30. The annealing furnace cylinder 2 has a rotating cylinder 6 inside. The rotating cylinder 6 has equidistant receiving cavities 61 on its side wall. A support plate 22 is movably inserted into the receiving cavity 61. The support plate 22 stores a single round steel bar. When the rotating cylinder 6 drives the multiple round steel bars inside the receiving cavity 61 to circulate in the annealing chamber 9, the multiple heating tubes 30 provide sufficient heating time for the annealing of the round steel bars. In this device, the heating tubes 30 are selected based on resistance heating. The basic structure consists of an outer shell tube, insulating filler, resistance wire, and lead-out terminals.

[0036] The heating tube 30 inside the annealing chamber 9 may become damaged after a period of use and therefore needs to be replaced. However, replacing the heating tube 30 is usually time-consuming, especially for some large annealing equipment. When the damaged heating tube 30 is pulled out from its fixed position inside the annealing chamber 9 but the entire equipment is still running, a low temperature zone will form at that position in the annealing chamber 9, which will seriously affect the continuous annealing effect on the round steel bar. Therefore, the annealing chamber 9 is equipped with a dual-tube switching heating mechanism, which enables seamless replacement of the heating tube 30 when the annealing chamber 9 is being replaced.

[0037] The dual-tube switching heating mechanism includes a mounting rod 10, a protruding block, and a temporary support assembly. The mounting rod 10 is vertically inserted into the annealing chamber 9. A rectangular groove matching the cross-sectional dimensions of the mounting rod 10 is formed at a corresponding position in the annealing chamber 9. Mounting grooves 102 are symmetrically formed on the side of the mounting rod 10. (See reference...) Figure 13 Therefore, two heating tubes 30 are installed on the mounting rod 10, and they are arranged "tail to tail". The lead terminal is located at the end of the mounting rod 10. The heating tubes 30 are fixedly connected to the mounting groove 102. The top of the mounting rod 10 has an integrally formed protrusion 101. (See reference) Figure 11When the entire dual-tube switching heating mechanism is in normal operation, the protruding block 101 is attached to the top of the annealing box 9. When it is necessary to replace the heating tube 30 at the top of the mounting rod 10, the heating tube 30 at the bottom of the mounting rod 10 can be started in advance. After the heating tube 30 at the bottom of the mounting rod 10 reaches the set temperature, the entire mounting rod 10 is quickly lifted up so that the heating tube 30 at the bottom of the mounting rod 10 enters the annealing box 9.

[0038] However, when replacing the heating tube 30 at the top of the mounting rod 10, it is necessary to maintain the mounting rod 10 in this state. Obviously, maintaining the vertical height of the mounting rod 10 manually would require a lot of manpower. The dual-tube switching heating mechanism also includes a temporary support mechanism assembly. When replacing the heating tube 30 in the annealing box 9, the standby heating tube 30 is limited inside the annealing box 9. The temporary support assembly includes a mounting block 26, a limiting block 29, and a limiting rod 27. The outer wall of the annealing box 9 is bolted to the mounting block 26. The number of mounting blocks 26 is the same as the number of mounting rods 10.

[0039] The mounting block 26 is vertically inserted into the intermediate column 28. The bottom of the intermediate column 28 is fixedly welded with a limiting block 29, and the top of the intermediate column 28 is rotatably connected with a limiting rod 27. A limiting frame 261 is welded onto the mounting block 26. When it is necessary to replace the heating tube 30 at the top of the mounting rod 10, the heating tube 30 at the bottom of the mounting rod 10 can be pre-activated. After the heating tube 30 at the bottom of the mounting rod 10 reaches the set temperature, the entire mounting rod 10 is quickly lifted. When the heating tube 30 at the bottom of the mounting rod 10 enters the annealing chamber 9, the limiting rod 27 can be extended into the limiting frame 261. At this time, the limiting block 29 supports the bottom of the mounting rod 10, maintaining the mounting rod 10 at this height, which can save a lot of manpower.

[0040] A storage box 8 is provided on one side of the annealing furnace cylinder 2 to buffer the round steel bars to be annealed. A discharge guide frame 7 is provided on the opposite side of the storage box 8 of the annealing furnace cylinder 2 to discharge the round steel bars after annealing. A common shaft 20 is fixedly welded to the bottom of the support plate 22. A self-capturing synchronization component is provided on the support plate 22. Before the round steel bars on the support plate 22 reach the side of the annealing box 9, the round steel bars are clamped, so that the support plate 22 and the round steel bars rotate synchronously. The self-capturing synchronization component includes a capture arc rod 23, a follower rod 24, a vertical cylinder 18 and a position control mechanism. The vertical cylinder 18 is sleeved on the outer wall of the common shaft 20. A top ring 25 is welded to the top of the common shaft 20. The top ring 25 is rotatably connected to the capture arc rod 23 by a pin. The top of the support plate 22 has a circular array of clearance grooves 220. The capture arc rod 23 extends out from the inside of the clearance grooves 220.

[0041] A support arc block 11 is fixedly welded to one side of the support plate 22 in the receiving cavity 61. The side wall of the support plate 22 fits against the side wall of the support arc block 11, which facilitates guiding the round steel bar to the top of the receiving cavity 61. The middle position of the capturing arc rod 23 is rotatably connected to one end of the follower rod 24 by a pin. The other end of the follower rod 24 is rotatably connected to the outer wall of the vertical cylinder 18 by a pin. The capturing arc rod 23 is actually an arc-shaped rod. When the support plate 22 is ready to be loaded, the capturing arc rod 23 can be pulled to the bottom of the clearance groove 220 through the vertical cylinder 18 and the follower rod 24 to avoid obstructing the round steel bar in the storage box 8 from falling into the support plate 22. In fact, in order to make the round steel bar as close as possible to the center of the support plate 22 when it reaches the top of the support plate 22 to facilitate the subsequent action of the capturing arc rod 23, as shown in reference 10, a shallow groove is provided at the top of the support plate 22.

[0042] The position control mechanism controls the capturing arc rod 23 to clamp the round steel bar before it enters the annealing box 9 and drive it to rotate for annealing. After the round steel bar leaves the annealing box 9, it is released, achieving automatic feeding. The position control mechanism includes a drive cylinder 15, an annular groove disc 19, and a synchronization column 171. The annular groove disc 19 is fixedly welded to the common shaft 20. A guide block 17 is fixedly welded to the middle position of the synchronization column 171. A middle rod 12 is inserted into the guide block 17 in a vertical direction. One end of the middle rod 12 is fixedly welded to the bottom of the supporting arc block 11. The drive cylinder 15 is bolted. Fixedly connected to the top of the base 3, one end of the synchronizing column 171 extends into the top of the drive cylinder 15. The top of the drive cylinder 15 has a bottom horizontal groove 151, a transition inclined groove 152, and a top horizontal groove 153 sequentially formed. In fact, the bottom horizontal groove 151 and the top horizontal groove 153 remain parallel to the end face of the base 3. When the synchronizing column 171 extends into the bottom horizontal groove 151 or the top horizontal groove 153, the synchronizing column 171 will not move vertically, and the synchronizing column 171 will not drive the multiple capturing arc rods 23 through the annular groove disc 19. Therefore, the lengths of the bottom horizontal groove 151 and the top horizontal groove 153 need to be set appropriately. (Refer to...) Figure 6 One end of the bottom horizontal groove 151 extends to the end of the storage box 8, while the two ends of the top horizontal groove 153 need to "wrap" one side of the annealing box 9 as much as possible. The other end of the synchronization column 171 of the bottom horizontal groove 151 extends into the groove of the annular groove plate 19. The outer wall of the drive cylinder 15 is bolted to the connecting rod 14. The top end of the connecting rod 14 is bolted to the outer wall of the annealing furnace cylinder 2, so that the annealing furnace cylinder 2 is "suspended", which makes it easy for one end of the synchronization column 171 to move along the top of the drive cylinder 15.

[0043] A common self-driving assembly is provided at the bottom of the common shaft 20. The common self-driving assembly drives the round steel bars on the support plate 22 to rotate continuously, and at the same time drives multiple support plates 22 to rotate, so that the round steel bars entering the annealing box 9 are annealed evenly. The common self-driving assembly includes a geared motor 4, a drive internal gear ring 13, a driven gear 21, and a synchronous disc 16. The output end of the geared motor 4 is fixedly connected to an extension column 41 by a coupling. The top end of the extension column 41 is fixedly welded to the bottom of the rotary drum 6. The extension column 41 is concentrically connected to the synchronous disc 16 below the rotary drum 6 by bolts. The bottom end of the common shaft 20 is rotatably connected to the synchronous disc 16 by a bearing. The synchronous disc 16 will rotate with the rotary drum 6. When the rotary drum 6 rotates, the multiple common shafts 20 will also move together.

[0044] A driven gear 21 is fixedly welded to the bottom of the common shaft 20. The driven gear 21 meshes with the inner wall of the drive internal gear ring 13. The drive internal gear ring 13 has a smooth section 131 below the storage box 8. The drive internal gear ring 13 is fixedly connected to the top of the base 3. The reduction motor 4 is fixedly connected to the bottom of the base 3 with bolts. The base 3 is sequentially fixedly welded with a long support frame 51 and a short support frame 52. The bottom of the long support frame 51 and the bottom of the short support frame 52 are both fixedly connected to the chassis 5. The length of the long support frame 51 is greater than the height of the short support frame 52. Therefore, all components above the base 3 are in a state of inclination towards the discharge guide frame 7. (Reference) Figure 1 The end of the storage box 8 away from the annealing furnace cylinder 2 has a bucket-shaped opening, which makes it easy to add round steel bars into the storage box 8. In fact, in order to automatically load and unload the round steel bars, the inner cavity width of the storage box 8 and the discharge guide frame 7 is slightly larger than the diameter of the round steel bars.

[0045] The specific implementation steps of this invention are as follows: First, the round steel bars are fed into the machine. The common self-drive assembly drives the rotary drum 6 to rotate continuously. At the same time, the geared motor 4 drives multiple driven gears 21 on the synchronous disc 16 to revolve around the axis of the extension column 41. Through the engagement of the drive internal gear ring 13 and the driven gears 21, the support disc 22 at the top of the common shaft 20 also rotates. However, because the drive internal gear ring 13 has a smooth section 131 on the inner wall below the storage box 8, when the driven gears 21 move to this position, the driven gear 21 at the bottom of the storage box 8 will not mesh with the drive internal gear ring 13. The support plate 22 does not rotate. The position control component controls the self-capturing component at the bottom of the storage box 8 to retract below the support plate 22. Specifically, the synchronous column 171 below the storage box 8 is above the transition chute 152. Due to gravity, the integrated structure of the support plate 22 drives the integrated structure of the synchronous column 171 to move downward through the annular plate 19. The vertical cylinder 18 drives multiple capturing arc rods 23 to retract below the clearance groove 220 of the support plate 22 through the follower rod 24. Multiple round steel bars arranged in the storage box 8 enter the receiving cavity 61 in sequence due to their own weight and continuously flow.

[0046] Next, the round steel bar is annealed and heated. The common self-driving component drives the rotary drum 6 to rotate continuously. Before entering the annealing box 9, the position control component controls the self-capturing component at the bottom of the storage box 8 to clamp and capture the round steel bar above the support plate 22. During this process, the synchronous column 171 below the storage box 8 moves from the transition chute 152 to above the top transverse chute 153. The other end of the synchronous column 171 lifts the vertical cylinder 18 through the annular disc 19. The vertical cylinder 18 drives multiple capturing arc rods 23 to rotate from below the clearance groove 220 of the support plate 22 to the top through the follower rod 24 to clamp the round steel bar. The support plate 22 rotates synchronously with the round steel bar. When the round steel bar moves to one side of the annealing box 9, the heating tube 30 on the side of the annealing box 9 performs uniform annealing and heating. Finally, the round steel bars are cooled in the furnace and unloaded. The common self-driving component drives the rotary drum 6 to rotate continuously. After the round steel bars that have been annealed and heated leave the annealing box 9, the position control component controls the self-capturing component at the bottom of the storage box 8 to return to the support plate 22. The support plate 22 does not rotate synchronously with the round steel bars. When the round steel bars move to the side of the discharge guide frame 7, the round steel bars fall from the discharge guide frame 7 due to their own weight.

[0047] By repeating the above three steps, the continuous annealing process of the round steel bar can be achieved.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A continuous annealing apparatus for annealing round steel bars, comprising an annealing furnace cylinder, an annealing chamber heating tube, and a base, characterized in that, An annealing box is fixedly connected to one side of the annealing furnace cylinder, and a dual-tube switching heating mechanism for replacing the heating tube is provided inside the annealing box. A storage box for buffering round steel bars to be annealed is provided on one side of the annealing furnace cylinder, and a discharge guide frame for discharging the annealed round steel bars is provided on the opposite side of the storage box. The annealing furnace cylinder is provided with a rotary cylinder inside the cavity. The rotary cylinder is provided with equidistant cavities on its side wall. A support plate is movably inserted into the cavities. The support plate stores a single round steel bar. A common shaft is fixedly connected to the bottom of the support plate, and a self-capturing synchronization component is provided on the support plate. Before the round steel bar on the support plate reaches one side of the annealing box, the self-capturing synchronization component clamps the round steel bar, and the support plate and the round steel bar rotate synchronously. A common self-driving component is provided at the bottom of the common shaft. The common self-driving component drives the round steel bar on the support plate to rotate continuously, and at the same time drives multiple support plates to rotate.

2. The continuous annealing equipment for annealing round steel bars according to claim 1, characterized in that, The self-capturing synchronization component includes a capture arc rod, a follower rod, a vertical cylinder, and a position control mechanism. The vertical cylinder is sleeved on the outer wall of the common shaft. A top ring is fixedly installed on the top of the common shaft. The capture arc rod is rotatably connected to the top ring. The top of the support plate has a circular array of clearance grooves. The capture arc rod extends out from the clearance grooves. A support arc block is fixedly installed on one side of the support plate in the receiving cavity. The middle position of the capture arc rod is rotatably connected to one end of the follower rod. The other end of the follower rod is rotatably connected to the outer wall of the vertical cylinder. The position control mechanism controls the capture arc rod to clamp the round steel bar before it enters the annealing box and drive the round steel bar to rotate and anneal. After the round steel bar leaves the annealing box, it is released to achieve automatic feeding.

3. The continuous annealing equipment for annealing round steel bars according to claim 2, characterized in that, The position control mechanism includes a drive cylinder, an annular groove disc, and a synchronizing column. The annular groove disc is fixedly connected to the common shaft. A guide block is fixedly connected to the middle position of the synchronizing column. A middle rod is inserted into the guide block in the vertical direction. One end of the middle rod is fixedly connected to the bottom of the support arc block.

4. The continuous annealing equipment for annealing round steel bars according to claim 3, characterized in that, The drive cylinder is fixedly connected to the top of the base. The top of the drive cylinder is sequentially provided with a bottom horizontal groove, a transition inclined groove, and a top horizontal groove. One end of the synchronizing column extends into the top of the drive cylinder, and the other end of the synchronizing column extends into the groove of the annular groove plate. A connecting rod is fixedly connected to the outer wall of the drive cylinder, and the top end of the connecting rod is fixedly connected to the outer wall of the annealing furnace cylinder.

5. The continuous annealing equipment and annealing process for annealing round steel bars according to claim 1, characterized in that, The common self-driving component includes a geared motor, a drive internal gear ring, a driven gear, and a timing disc. An extension column is fixedly connected to the output end of the geared motor. The top end of the extension column is fixedly connected to the bottom of the rotary drum. A timing disc is concentrically fixedly connected to the extension column below the rotary drum.

6. A continuous annealing apparatus for annealing round steel bars according to claim 5, characterized in that, The bottom end of the common shaft is rotatably connected to the synchronous disk. A driven gear is fixedly connected to the bottom of the common shaft. The driven gear meshes with the inner wall of the drive internal gear ring. A smooth section is opened below the storage box of the drive internal gear ring. The drive internal gear ring is fixedly connected to the top of the base.

7. A continuous annealing apparatus for annealing round steel bars according to claim 1, characterized in that, The geared motor is fixedly connected to the bottom of the base, and the base is fixedly connected in sequence to a long support and a short support. The bottom of the long support and the bottom of the short support are both fixedly connected to the chassis.

8. A continuous annealing apparatus for annealing round steel bars according to claim 1, characterized in that, The dual-tube switching mechanism includes a mounting rod, a protruding block, and a temporary support assembly. When the heating tube is replaced in the annealing chamber, the temporary support assembly limits the standby heating tube inside the annealing chamber. An installation rod is inserted vertically through the annealing box. The installation rod has symmetrically opened installation slots on its side. A heating tube is fixedly connected to the installation rod in the installation slot. A protruding block is fixedly connected to the top of the installation rod.

9. A continuous annealing apparatus for annealing round steel bars according to claim 1, characterized in that, The temporary support assembly includes a mounting block, a limiting block, and a limiting rod. The mounting block is fixedly connected to the outer wall of the annealing box, and the mounting block is movably inserted into the intermediate column in the vertical direction.

10. A continuous annealing apparatus for annealing round steel bars according to claim 9, characterized in that, A limiting block is fixedly connected to the bottom of the intermediate column, a limiting rod is rotatably connected to the top of the intermediate column, a limiting frame is fixedly provided on the mounting block, and the limiting rod extends into the limiting frame.

11. An annealing process for round steel bars, used in the continuous annealing equipment for round steel bars as described in any one of claims 1-10, characterized in that, Includes the following steps: S1, the feeding of round steel bars: the common self-driving component drives the rotary drum to rotate continuously, and the position control component controls the self-capturing component at the bottom of the storage box to retract below the support plate. Multiple round steel bars arranged in the storage box enter the receiving cavity in sequence due to their own weight and flow continuously. S2, the annealing heating of the round steel bar: the common self-driving component drives the rotary drum to rotate continuously. Before entering the annealing box, the position control component controls the self-capturing component at the bottom of the storage box to clamp and capture the round steel bar above the support plate. The support plate and the round steel bar rotate synchronously, and the round steel bar is annealed and heated evenly. S3, the round steel bar is cooled and unloaded in the furnace. The common self-driving component drives the rotary drum to rotate continuously. After the round steel bar leaves the annealing box after the annealing heating is completed, the position control component controls the self-capturing component at the bottom of the storage box to retract into the support plate. The support plate does not rotate synchronously with the round steel bar. When the round steel bar moves to the side of the discharge guide frame, the round steel bar falls from the discharge guide frame due to its own weight.

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