A reinforcing bar hot rolling device

Abstract

The application relates to a reinforcing steel bar hot rolling device and belongs to the field of hot rolling equipment. The device comprises a descaling box body and a hot rolling device which are sequentially arranged along the processing direction of a steel billet; a displacement frame is slidably arranged in the descaling box body; a plurality of cleaning units are slidably arranged on the displacement frame along the radial direction of the steel billet; a plurality of positioning units are slidably arranged in the descaling box body along the radial direction of the steel billet; a guide roller is rotatably arranged in the descaling box body; a driving motor is arranged on the descaling box body; the power output end of the driving motor is coaxially connected with the guide roller; the positioning units, the cleaning units and the guide roller are sequentially arranged along the processing direction of the steel billet; a baffle is slidably connected to the positioning unit; the baffle is provided with a receiving part; the receiving part is opposite to the cleaning unit; the application has the technical effects of uniform steel billet surface cleaning and strong cleaning effect.

Description

Technical Field

[0001] This application relates to the technical field of hot rolling equipment, and in particular to a hot rolling apparatus for reinforcing bars. Background Technology

[0002] In the steel bar production process, hot rolling is one of the core processes. After the steel billet is heated, an oxide scale will form on its surface. If it is not removed in time, it will affect the surface quality, dimensional accuracy and mechanical properties of the subsequently hot-rolled steel bars. Therefore, the descaling process is a key step before hot rolling of steel bars.

[0003] The existing hot-rolling steel bar descaling and conveying structures are poorly designed, often suffering from insufficient positioning accuracy and uneven descaling. During billet conveying, misalignment easily occurs, causing the cleaning unit to fail to accurately align with the billet surface, resulting in defects such as residual oxide scale and surface scratches.

[0004] Patent application number 2026100319965 discloses a descaling device for rolled steel sections, relating to the field of rolled steel preparation technology. It includes a first descaling assembly and a second descaling assembly arranged along the conveying direction of the rolled steel section; and a hot bending assembly disposed between the first and second descaling assemblies. The hot bending assembly is used to extrude the rolled steel section after passing through the first descaling assembly, and to input the extruded and bent rolled steel section into the second descaling assembly. While the above patent can enhance the descaling effect, it suffers from problems such as billet skewness and collision with the cleaning equipment during the initial cleaning of the billet surface.

[0005] Regarding the aforementioned technologies, the inventors believe that there is a defect of uneven cleaning of the steel billet surface. Summary of the Invention

[0006] To solve the above-mentioned technical problems, this application provides a steel bar hot rolling device.

[0007] This application provides a hot rolling device for reinforcing bars, which adopts the following technical solution: A hot-rolling apparatus for reinforcing bars includes a descaling box and a hot-rolling device arranged sequentially along the processing direction of a steel billet; a displacement frame is slidably arranged inside the descaling box; multiple cleaning units are slidably arranged on the displacement frame along the radial direction of the steel billet; multiple positioning units are slidably arranged inside the descaling box along the radial direction of the steel billet; a guide roller is rotatably arranged inside the descaling box; a drive motor is arranged on the descaling box; the power output end of the drive motor is coaxially connected to the guide roller; the positioning units, the cleaning units, and the guide roller are arranged sequentially along the processing direction of the steel billet; a baffle is slidably connected to the positioning unit; the baffle has a receiving portion; the receiving portion is directly opposite the cleaning unit.

[0008] By adopting the above technical solution, multiple positioning units are slidably set along the radial direction of the billet. The positioning position can be automatically adjusted according to the actual cross-sectional size of billets of different specifications, so as to achieve precise centering of the billet and avoid the billet shaking or shifting during transportation. This provides a stable benchmark for subsequent descaling operations. The baffles slidably connected to the positioning units have their receiving parts precisely aligned with the cleaning units, providing a reliable reference for the water pressure debugging and position calibration of the cleaning units. This ensures that the spraying state of multiple cleaning units is consistent, thereby achieving all-round and uniform descaling of the billet surface, reducing oxide scale residue, providing high-quality billets for subsequent hot rolling processes, and improving the dimensional accuracy and mechanical properties of finished steel bars.

[0009] Preferably, the positioning unit includes a positioning seat and a positioning roller; the positioning seat is slidably disposed in the descaling box along the radial direction of the steel billet; the positioning roller is rotatably disposed on the positioning seat; and the positioning roller abuts against the side wall of the steel billet.

[0010] By adopting the above technical solution, the positioning seat slides radially along the billet, which can adapt to billets of different specifications. The positioning roller is rotated and set on the positioning seat and abuts against the side wall of the billet. It can not only fit closely to the billet during positioning and achieve precise centering, preventing the billet from shaking and deviating during transportation, but also convert the sliding friction between the billet and the positioning unit into rolling friction, which can greatly reduce wear and scratches on the surface of the billet, avoid damage to the surface of the billet, and ensure the quality of the billet in subsequent hot rolling.

[0011] Preferably, the positioning seat has an inclined sliding hole; the baffle is provided with a first sliding rod; the first sliding rod is slidably disposed in the sliding hole; a second elastic element is sleeved on the first sliding rod; the second elastic element is located between the baffle and the positioning seat; the second elastic element is used to provide a force for the baffle to move away from the positioning seat.

[0012] By adopting the above technical solution, the sliding engagement between the inclined sliding hole and the first sliding rod allows the baffle to move along a preset inclined trajectory, avoiding calibration deviation of the cleaning unit due to baffle offset, thereby ensuring the uniformity of billet descaling and providing qualified billets for subsequent hot rolling processes; the second elastic element always provides a force to the baffle away from the positioning seat, allowing the baffle to automatically reset to the initial calibration position when no external force is applied, without the need for manual adjustment; after the billet passes through, the baffle can quickly return to the state facing the cleaning unit, preparing for the positioning and cleaning unit calibration of the next billet, effectively ensuring production continuity and improving production efficiency.

[0013] Preferably, the positioning unit further includes a gear, a rack, and a plurality of second slide rods; the gear is coaxially connected to the positioning roller; the rack is slidably disposed on the positioning seat; the gear meshes with the rack; the plurality of second slide rods are respectively slidably disposed on the rack; one end of the plurality of second slide rods is connected to the baffle.

[0014] By adopting the above technical solution, the gear and the positioning roller are coaxially connected, the rack and the gear mesh, and the rack and the baffle are connected through the second slide rod, so as to achieve precise linkage between the rotation of the positioning roller and the movement of the baffle. When the steel billet drives the positioning roller to rotate, the baffle can be pulled to move synchronously through the gear and rack transmission, so as to ensure that the timing and displacement of the baffle movement are precisely matched with the steel billet conveying state, effectively avoiding interference and scratching between the baffle and the steel billet, ensuring that the steel billet passes through the positioning unit smoothly, while preventing damage to the baffle and improving the safety of the device operation.

[0015] Preferably, the positioning seat is provided with a plurality of guide rods; a plurality of first elastic elements are respectively sleeved on the plurality of guide rods; the first elastic elements are located between the positioning seat and the descaling box; the first elastic elements are used to provide a force for the positioning seat to approach the steel billet.

[0016] By adopting the above technical solution, the first elastic element always provides a force close to the steel billet to the positioning seat, which can push the positioning seat to slide radially along the guide rod, so that the positioning roller automatically fits the side wall of steel billets of different specifications. Without the need for manual adjustment of the positioning seat position, the steel billet can be automatically centered, flexibly adapting to steel billets of different diameters and cross sections, thus improving the versatility of the device.

[0017] Preferably, the positioning seat is provided with an isolation sleeve; the isolation sleeve is fitted around the periphery of the plurality of guide rods.

[0018] By adopting the above technical solution, the isolation sleeve is installed on the outside of all guide rods, which can completely isolate the oxide scale, debris, and sewage generated during the descaling process from the guide rods and the first elastic element, prevent impurities from entering the mating gap between the positioning seat and the guide rod, prevent the guide rods from being stuck or worn, and ensure that the positioning seat can always slide flexibly and smoothly in the radial direction.

[0019] Preferably, the cleaning unit includes a water supply source, a cleaning frame, and a positioning nozzle and multiple cleaning nozzles mounted on the cleaning frame; the cleaning frame is slidably mounted on the displacement frame along the radial direction of the steel billet; the water supply source is connected to the positioning nozzle; a positioning plate is mounted on the displacement frame; the positioning nozzle has a first water nozzle facing the receiving part and a second water nozzle facing the positioning plate; a water pipe is connected between the positioning nozzle and the multiple cleaning nozzles; a sealing plate is rotatably mounted inside the positioning nozzle; the sealing plate, after rotation, is used to block the second water nozzle or the water pipe.

[0020] By adopting the above technical solution, water jets are sprayed onto the baffle receiving part and the positioning plate respectively using the first and second spray nozzles of the positioning nozzle. The reaction force of the bidirectional water flow automatically centers the cleaning frame, ensuring that multiple cleaning units are evenly distributed around the steel billet. This ensures uniform descaling without dead corners from the source, significantly improving the surface quality of the billet before hot rolling of the steel bars. The automatic switching between the positioning water path and the cleaning water path is achieved by rotating the sealing plate. During the positioning stage, the cleaning nozzle is turned off and the positioning water spray is turned on. During the descaling stage, the second spray nozzle is turned off to avoid water waste and the cleaning nozzle is turned on. The two working states do not interfere with each other, resulting in high positioning accuracy and stable descaling effect. The cleaning frame can slide radially along the displacement frame, which can adapt to steel billets of different diameters. It has strong versatility and can meet the production needs of multiple types of steel bars without changing tooling, improving the applicability and production efficiency of the equipment.

[0021] Preferably, the displacement frame has a sliding groove; the cleaning frame has a slider; the slider is slidably disposed in the sliding groove; the slider has a fixing groove; two fixing blocks are slidably disposed in the fixing groove; the fixing blocks are provided with first fixing teeth; the displacement frame is provided with two sets of second fixing teeth; after the two sets of fixing blocks slide, the two sets of first fixing teeth respectively engage with the two sets of second fixing teeth.

[0022] By adopting the above technical solution, the cleaning frame slides on the displacement frame through the cooperation of the slider and the chute. The guide is straight and without sway, ensuring smooth radial movement of the cleaning frame along the billet and guaranteeing precise positioning of the positioning nozzles and cleaning nozzles, further improving the uniformity of descaling. The first fixing tooth on the fixed block meshes with the second fixing tooth on the displacement frame, providing a large contact area and strong locking force. This effectively resists the reverse impact force generated by high-pressure water jets, preventing the cleaning frame from shifting or loosening during descaling and ensuring continuous stability in the descaling process. After the cleaning frame is fixed on the displacement frame, it can spray pressurized water onto the billet surface through multiple positioning nozzles, ensuring that the billet always passes through the center of multiple cleaning units. This allows the equipment to clean billets in a bent state, further improving the equipment's applicability.

[0023] Preferably, a transmission cavity is provided between the two fixed blocks; an adjustment seat is provided on the slider; an adjustment hole is provided in the adjustment seat; the transmission cavity is connected to the adjustment hole; the adjustment hole is connected to the water supply source through an adjustment pipe; an adjustment rod is slidably provided in the adjustment hole; a connecting hole is provided on the adjustment rod; after the adjustment rod slides, the connecting hole is connected to or misaligned with the transmission cavity and the adjustment pipe.

[0024] By adopting the above technical solution, the transmission cavity, adjusting seat, adjusting rod, and two adjusting pipes are directly connected to the device's own high-pressure descaling water circuit. The fixed block can be driven by the pressure of the descaling water itself, without the need for additional independent driving components such as motors and cylinders. This greatly simplifies the structure, reduces equipment costs and failure rates, and also reduces energy consumption and pipeline layout. By sliding the adjusting rod in the adjusting hole, the connecting hole can be connected to or misaligned with the transmission cavity and adjusting pipe, enabling rapid switching of the water pressure circuit. The control is sensitive and responsive, and it can accurately achieve locking and depressurization reset, ensuring that the fixing and unlocking actions of the cleaning unit are synchronized and timely.

[0025] Preferably, the adjusting rod is provided with a linkage groove; the baffle is provided with a linkage rod; the linkage rod passes through the linkage groove along the radial direction of the steel billet.

[0026] By adopting the above technical solution, when the baffle avoids the steel billet, it immediately drives the adjusting rod to conduct water pressure and lock the cleaning unit; when the baffle resets, it simultaneously drives the adjusting rod to cut off the water pressure and unlock the cleaning unit, so that the fixing and unlocking of the cleaning unit works synchronously with the feeding and discharging of the steel billet, avoiding equipment interference and operational failures caused by delayed locking and untimely unlocking.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. Multiple positioning units are slidably set along the radial direction of the billet. They can automatically adjust their positioning positions according to the actual cross-sectional dimensions of billets of different specifications, achieving precise centering of the billet and preventing it from shaking or shifting during transportation. This provides a stable reference for subsequent descaling operations. The baffles slidably connected to the positioning units have their receiving parts precisely aligned with the cleaning units, providing a reliable reference for the water pressure debugging and position calibration of the cleaning units. This ensures that the spraying state of multiple cleaning units is consistent, thereby achieving all-round and uniform descaling of the billet surface, reducing oxide scale residue, providing high-quality billets for subsequent hot rolling processes, and improving the dimensional accuracy and mechanical properties of the finished steel bars.

[0028] 2. The gear and positioning roller are coaxially connected, and the rack meshes with the gear. It is also connected to the baffle through the second slide rod, realizing precise linkage between the rotation of the positioning roller and the movement of the baffle. When the steel billet drives the positioning roller to rotate, the baffle can be pulled synchronously through the gear and rack transmission. This ensures that the timing and displacement of the baffle movement are precisely matched with the steel billet conveying status, effectively avoiding interference and scratching between the baffle and the steel billet, ensuring that the steel billet passes smoothly through the positioning unit, while preventing damage to the baffle and improving the safety of the device operation. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a steel bar hot rolling device.

[0030] Figure 2 This is a schematic diagram of the internal structure of the descaling box in the embodiment.

[0031] Figure 3 This is a diagram showing the positional relationship between the steel billet and the positioning unit in the embodiment.

[0032] Figure 4 yes Figure 3 A magnified view of part A in the image.

[0033] Figure 5 This is a schematic diagram of the positioning unit in the embodiment.

[0034] Figure 6 This is a schematic diagram of the cleaning unit in the embodiment.

[0035] Figure 7 yes Figure 6 A magnified view of part B in the image.

[0036] Figure 8 This is a schematic diagram of the internal structure of the positioning nozzle in the embodiment.

[0037] Figure 9 This is a schematic diagram of the displacement frame in the embodiment.

[0038] Figure 10 yes Figure 9 A magnified view of part C.

[0039] Figure 11 This is a schematic diagram of the internal structure of the slider in the embodiment.

[0040] Explanation of reference numerals in the attached figures: 1. Descaling box; 11. Guide roller; 12. Drive motor; 13. Slot; 14. Positioning block; 2. Hot rolling equipment; 3. Displacement frame; 31. Positioning plate; 32. Slide groove; 33. Second fixing tooth; 34. Displacement rod; 4. Cleaning unit; 41. Cleaning frame; 411. Slider; 412. Fixing block; 4121. First fixing tooth; 413. Transmission cavity; 42. Positioning nozzle; 421. First spray nozzle; 422. Second spray nozzle; 423. Sealing plate; 43 1. Cleaning nozzle; 431. Water pipe; 5. Positioning unit; 51. Positioning seat; 511. Guide rod; 512. First elastic element; 513. Isolation sleeve; 52. Positioning roller; 53. Gear; 54. Rack; 55. Second slide rod; 6. Baffle; 61. Receiving part; 62. First slide rod; 63. Second elastic element; 64. Linkage rod; 7. Adjusting seat; 71. Adjusting hole; 72. Adjusting pipe; 73. Adjusting rod; 731. Connecting hole; 732. Linkage groove; 8. Steel billet. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0042] This application discloses a hot rolling apparatus for reinforcing bars. (Refer to...) Figure 1-3 The system includes a descaling box 1 and a hot rolling mill 2 arranged sequentially along the processing direction of the billet 8; a displacement frame 3 is slidably arranged inside the descaling box 1; multiple strip grooves 13 are formed on the descaling box 1; the multiple strip grooves 13 are evenly distributed along the circumference of the billet 8; positioning blocks 14 are slidably arranged in the multiple strip grooves 13; positioning holes are provided on the positioning blocks 14; multiple displacement rods 34 are provided on the displacement frame 3; the multiple displacement rods 34 are evenly distributed along the circumference of the billet 8; the multiple displacement rods 34 pass through the multiple positioning holes; displacement rods 34 may not be provided below the displacement frame 3; multiple sets of cleaning units 4 are slidably arranged on the displacement frame 3 along the radial direction of the billet 8; multiple sets of positioning units 4 are slidably arranged in the descaling box 1 along the radial direction of the billet 8. Unit 5; a guide roller 11 is rotatably installed inside the descaling box 1; a drive motor 12 is installed on the descaling box 1; the power output end of the drive motor 12 is coaxially connected to the guide roller 11; the positioning unit 5, the cleaning unit 4, and the guide roller 11 are arranged sequentially along the processing direction of the steel billet 8; the heated steel billet 8 enters the descaling box 1 along the processing direction, the drive motor 12 on the descaling box 1 starts, driving the coaxially connected guide roller 11 to rotate, the guide roller 11 provides stable conveying power for the steel billet 8, ensuring that the steel billet 8 moves at a uniform speed along the preset processing direction, avoiding the steel billet 8 from deviating and causing uneven descaling in the subsequent process; a baffle 6 is slidably connected to the positioning unit 5; the baffle 6 has a receiving part 61; the receiving part 61 is directly opposite the cleaning unit 4.

[0043] After the steel billet 8 enters the descaling chamber 1, it first passes through multiple sets of positioning units 5 that slide radially along the billet 8. The positioning units 5 adjust their positions synchronously along the radial direction according to the actual cross-sectional dimensions of the billet 8, achieving precise centering and positioning of the billet 8. At the same time, the baffle 6 slidably connected to the positioning unit 5 moves synchronously with the positioning unit 5, so that the receiving part 61 of the baffle 6 is precisely aligned with the subsequent cleaning unit 4, providing a reference for the pressure adjustment of the cleaning unit 4. Multiple cleaning units 4 on the displacement frame 3 spray pressurized water outwards, which directly sprays onto the receiving part 61 of the baffle 6. Since the spraying water pressure of the multiple cleaning units 4 is kept consistent, and the distance between all cleaning units 4 and the receiving part 61 of the baffle 6 is exactly the same through the sliding adjustment of the displacement frame 3, the spraying state of the multiple cleaning units 4 is uniform. When the displacement frame 3 slides, the displacement rod 34 slides in the positioning hole and the positioning block 14 slides in the strip groove 13 to adapt to the movement requirements of the displacement frame 3. Then the cleaning unit 4 is fixed on the displacement frame 3 to complete the calibration. After calibration, the billet 8 continues to move along the processing direction and passes through the multiple cleaning units 4 at a uniform speed. Cleaning unit 4 continuously sprays pressurized water, and the water flow impacts the oxide scale on the surface of the billet 8 to achieve descaling. At the same time, the reaction force generated by the water flow spraying onto the surface of the billet 8, in conjunction with the positioning structure of the cleaning unit 4 itself, ensures that multiple sets of cleaning units 4 always maintain the same distance from the side wall of the billet 8, ensuring that the cleaning units 4 are evenly distributed on the outer surface of the billet 8, achieving all-round and uniform descaling, and providing qualified billets for subsequent hot rolling processes.

[0044] Reference Figures 3 to 5 The positioning unit 5 includes a positioning seat 51, a positioning roller 52, a gear 53, a rack 54, and multiple second slide rods 55. The positioning seat 51 is slidably disposed within the descaling box 1 along the radial direction of the billet 8. The positioning roller 52 is rotatably disposed on the positioning seat 51. The positioning roller 52 abuts against the side wall of the billet 8. Multiple guide rods 511 are disposed on the positioning seat 51. Multiple first elastic elements 512 are respectively sleeved on the multiple guide rods 511. The first elastic elements 512 are springs. The first elastic elements 512 are located at the positioning... Between the positioning seat 51 and the descaling box 1; the first elastic element 512 is used to provide force for the positioning seat 51 to approach the billet 8; since the positioning unit 5 itself has gravity, the first elastic element 512 may not be provided at the positioning unit 5 located above; the positioning seat 51 is slidably arranged along the radial direction of the billet 8 of the descaling box 1 through the guide rod 511, and the first elastic element 512 sleeved on the guide rod 511 is in a natural extension and contraction state, and its elastic force continuously acts on the positioning seat 51, pushing the positioning seat 51 to approach the billet 8.

[0045] When the heated steel billet 8 enters the descaling box 1 and is conveyed to the positioning unit 5, the side wall of the steel billet 8 abuts against the positioning roller 52 rotatably mounted on the positioning seat 51. As the steel billet 8 is continuously conveyed, the steel billet 8 generates a radial reaction force on the positioning roller 52, pushing the positioning seat 51 to slide slightly away from the steel billet 8 along the guide rod 511 until the elastic force of the first elastic element 512 and the reaction force of the steel billet 8 reach equilibrium. At this time, the positioning rollers 52 of multiple positioning units 5 are all in close contact with the side wall of the steel billet 8, realizing the precise centering of the steel billet 8 and preventing the steel billet 8 from shaking or shifting during the conveying process, providing a stable benchmark for the subsequent calibration and descaling operation of the cleaning unit 4.

[0046] An inclined sliding hole is provided on the positioning seat 51; a first sliding rod 62 is provided on the baffle 6; the first sliding rod 62 is slidably disposed in the sliding hole; a second elastic element 63 is sleeved on the first sliding rod 62; the second elastic element 63 is a spring; the second elastic element 63 is located between the baffle 6 and the positioning seat 51; the second elastic element 63 is used to provide a force for the baffle 6 to move away from the positioning seat 51; so that the baffle 6 is initially kept close to the cleaning unit 4, ensuring that the receiving part 61 is accurately aligned with the cleaning unit 4, and meeting the water pressure and position calibration requirements of the cleaning unit 4.

[0047] Gear 53 is coaxially connected to positioning roller 52; rack 54 is slidably disposed on positioning seat 51; gear 53 meshes with rack 54; multiple through holes are provided on rack 54; one end of multiple second slide rods 55 is slidably disposed in multiple through holes of rack 54; the other end of multiple second slide rods 55 is connected to baffle 6.

[0048] When the billet 8 passes the positioning roller 52, the movement of the billet 8 will drive the positioning roller 52 to rotate. The positioning roller 52 is coaxially connected with the gear 53, which in turn drives the gear 53 to rotate synchronously. The gear 53 meshes with the rack 54 slidably set on the positioning seat 51. The rotation of the gear 53 drives the rack 54 to slide along the positioning seat 51. The multiple second slide rods 55 connected to the rack 54 move synchronously, which in turn pulls the baffle 6 to move away from the cleaning unit 4, so as to avoid interference between the baffle 6 and the billet 8, and ensure that the billet 8 passes smoothly through the positioning unit 5 and enters the subsequent descaling process.

[0049] After the billet 8 has completely passed the positioning unit 5, the radial reaction force of the billet 8 on the positioning roller 52 disappears. The elastic force of the first elastic element 512 pushes the positioning seat 51 to reset towards the workpiece, the positioning roller 52 stops rotating, and the gear 53 and rack 54 also stop moving. At the same time, the elastic force of the second elastic element 63 pushes the baffle 6 to reset towards the cleaning unit 4, returning it to the initial calibration position, preparing for the positioning of the next billet 8 and the calibration of the cleaning unit 4, realizing the linkage reset of continuous production.

[0050] An isolation sleeve 513 is provided on the positioning seat 51; the isolation sleeve 513 is fitted around the periphery of multiple guide rods 511; when the cleaning unit 4 performs descaling operation on the steel billet 8, the oxide scale debris that falls off the surface of the steel billet 8 will be scattered with the water flow. The isolation sleeve 513 can effectively prevent these debris from entering the sliding fit between the guide rod 511 and the positioning seat 51, avoiding debris from jamming the guide rod 511 and wearing the sliding surface, ensuring that the guide rod 511 slides smoothly, and ensuring the positioning accuracy and operational stability of the positioning unit 5.

[0051] Reference Figures 5 to 8 The cleaning unit 4 includes a water supply source, a cleaning frame 41, and a positioning nozzle 42 and multiple cleaning nozzles 43 mounted on the cleaning frame 41. The cleaning frame 41 is slidably mounted on the displacement frame 3 along the radial direction of the billet 8. The water supply source is connected to the positioning nozzle 42. To prevent confusion in the drawings, the air supply source is not shown in the drawings. A positioning plate 31 is mounted on the displacement frame 3. The positioning nozzle 42 has a first water nozzle 421 facing the receiving part 61 and a second water nozzle 422 facing the positioning plate 31. A water pipe 431 is connected between the positioning nozzle 42 and the multiple cleaning nozzles 43. A sealing plate 423 is rotatably mounted inside the positioning nozzle 42. After the sealing plate 423 rotates, it is used to block the second water nozzle 422 or the water pipe 431.

[0052] Reference Figures 9 to 11 The displacement frame 3 has a sliding groove 32; the cleaning frame 41 has a slider 411; the slider 411 is slidably disposed in the sliding groove 32; the cleaning frame 41 can move freely along the radial direction of the billet 8 through the sliding engagement of the slider 411 and the sliding groove 32 of the displacement frame 3; a fixing groove is provided on the slider 411; two fixing blocks 412 are slidably disposed in the fixing groove; the fixing blocks 412 are provided with first fixing teeth 4121; the displacement frame 3 is provided with two sets of second fixing teeth 33; the positioning nozzle 42 has a dense When the sealing plate 423 is in its initial position, the water pipe 431 is blocked and the second water nozzle 422 is opened, the pressurized water from the water supply source cannot enter the cleaning nozzle 43; the adjusting rod 73 is in its initial position in the adjusting hole 71 of the adjusting seat 7, the connecting hole 731 is misaligned with the transmission cavity 413 and the adjusting pipe 72, the adjusting pipe 72 is not connected to the water supply source, the fixing block 412 is in a retracted state in the fixing groove, the first fixing tooth 4121 and the second fixing tooth 33 are separated, and the cleaning unit 4 can slide freely along the displacement frame 3.

[0053] When the positioning unit 5 completes the positioning of the billet 8 and the baffle 6 is in the initial calibration position, the water supply is activated, conveying pressurized water to the positioning nozzle 42. The first nozzle 421 of the positioning nozzle 42 is directly opposite the receiving part 61 of the baffle 6, and the second nozzle 422 is directly opposite the positioning plate 31 on the displacement frame 3. The two water streams spray simultaneously, and the reaction force of the water streams pushes the cleaning frame 41 to slide along the slide groove 32 of the displacement frame 3 until the positioning nozzle 42 reaches a force balance between the positioning plate 31 and the baffle 6. That is, the distance between the first nozzle 421 and the baffle 6, and the distance between the second nozzle 422 and the positioning plate 31 are equal, and the reaction forces of the water streams cancel each other out. The cleaning unit 4 achieves precise positioning, ensuring that multiple cleaning nozzles 43 are evenly distributed on the radial circumference of the billet 8, laying the foundation for subsequent uniform descaling.

[0054] A servo motor is installed on the cleaning frame 41, and the power output end of the servo motor is connected to the sealing plate 423. The servo motor can drive the sealing plate 423 to rotate. After the cleaning unit 4 is positioned and stabilized, the sealing plate 423 inside the positioning nozzle 42 is rotated to complete two key switches: first, the second water nozzle 422 is blocked to stop spraying water to the positioning plate 31 and terminate the positioning calibration action; second, the water pipe 431 is opened so that the pressurized water from the water supply source can enter multiple cleaning nozzles 43 through the positioning nozzle 42 to prepare for the descaling operation.

[0055] A transmission cavity 413 is provided between the two fixed blocks 412; an adjusting seat 7 is provided on the slider 411; an adjusting hole 71 is provided in the adjusting seat 7; the transmission cavity 413 is connected to the adjusting hole 71; the adjusting hole 71 is connected to the water supply source through an adjusting pipe 72; an adjusting rod 73 is slidably provided in the adjusting hole 71; a connecting hole 731 is provided on the adjusting rod 73; after the adjusting rod 73 slides, the connecting hole 731 is connected to or misaligned with the transmission cavity 413 and the adjusting pipe 72; a linkage groove 732 is provided on the adjusting rod 73; a linkage rod 64 is provided on the baffle 6; the linkage rod 64 passes through the linkage groove 732 radially along the billet 8.

[0056] When the billet 8 passes through the positioning unit 5, the positioning unit 5 drives the baffle 6 to slide away from the cleaning unit 4, and the linkage rod 64 on the baffle 6 moves synchronously. Since the linkage rod 64 passes through the linkage groove 732 on the adjusting rod 73 radially along the billet 8, when the linkage rod 64 moves, it pulls the adjusting rod 73 to slide in the adjusting hole 71 of the adjusting seat 7 until the connecting hole 731 on the adjusting rod 73 is fully connected to the transmission cavity 413 and the adjusting pipe 72. At this time, the pressurized water in the water supply source enters the transmission cavity 413 between the two fixed blocks 412 through the adjusting pipe 72 and the connecting hole 731. The pressurized water generates a radial thrust on the fixed block 412, pushing the fixed block 412 to slide outward of the slider 411. After the two sets of fixed blocks 412 slide, the two sets of first fixing teeth 4121 respectively mesh with the two sets of second fixing teeth 33, thereby firmly fixing the slider 411, the cleaning frame 41 and the entire cleaning unit 4 on the displacement frame 3, preventing the cleaning unit 4 from shifting during the descaling process.

[0057] After the cleaning unit 4 is fixed, pressurized water is delivered to multiple cleaning nozzles 43 through water pipe 431. The cleaning nozzles 43 spray high-pressure water jets onto the surface of the billet 8, impacting the oxide scale on the surface of the billet 8 to achieve descaling. At the same time, the reaction force generated by the water jet on the positioning nozzle 42 spraying onto the surface of the billet 8, in conjunction with the fixing structure of the cleaning unit 4, further ensures that the multiple cleaning nozzles 43 maintain the same distance from the side wall of the billet 8, and are always evenly distributed on the outer surface of the billet 8, ensuring the uniformity of descaling; and adapting to the bent state of the billet 8; thereby improving the descaling efficiency of the billet 8 and improving the hot rolling quality of the reinforcing steel.

[0058] It should be noted that the angle between the water jet from the positioning nozzle 42 and the side wall of the billet 8 is between 75° and 90°, which realizes the positioning of the cleaning frame 41 and the initial cleaning of the billet 8; the angle between the water jet from the cleaning nozzle 43 and the side wall of the billet 8 is between 15° and 30°, which realizes the deep cleaning of the surface of the billet 8; when cleaning the surface of the billet 8, the water and debris flow to the periphery of the billet 8 under the guidance of the baffle 6, which prevents debris from accumulating at the positioning unit 5.

[0059] After the billet 8 has completely passed through the cleaning unit 4, the positioning unit 5 drives the baffle 6 to reset, and the linkage rod 64 resets accordingly. The adjusting rod 73 is pulled to slide, causing the connecting hole 731 to be misaligned with the transmission cavity 413 and the adjusting pipe 72. The pressurized water in the transmission cavity 413 is depressurized, and a tension spring is installed between the two fixing blocks 412. The two fixing blocks 412 retract under the action of the tension spring, and the first fixing tooth 4121 separates from the second fixing tooth 33, releasing the cleaning unit 4 from fixation. At the same time, the sealing plate 423 is rotated to block the water pipe 431 and open the second spray nozzle 422. The cleaning unit 4 returns to its initial state, preparing for the positioning calibration and descaling operation of the next billet 8.

[0060] The working principle of a hot-rolling device for reinforcing bars in this application is as follows: After heating, the steel billet 8 enters the descaling chamber 1. Multiple positioning units 5 press against the steel billet 8 under the action of the first elastic element 512, achieving automatic centering and ensuring that the steel billet 8 passes smoothly through the middle of the multiple cleaning units 4. The positioning roller 52 rotates with the movement of the steel billet 8, and drives the baffle 6 to move through the gear 53 and rack 54, so that the baffle 6 automatically avoids the cleaning unit 4 when the steel billet 8 passes through during the calibration stage. The cleaning unit 4 sprays water into the baffle 6 and the positioning plate 31 respectively through the two spray nozzles of the positioning nozzle 42. The bidirectional water flow reaction force makes the cleaning frame 41 automatically align and center. After positioning, the sealing plate 423 rotates to switch the water path, closes the second spray nozzle 422 and connects the cleaning nozzle 43. When the baffle 6 moves, it drives the adjusting rod 73 to slide via the linkage rod 64, thus connecting the water pressure circuit. High-pressure water pushes the fixed block 412 outward, causing the first fixing tooth 4121 to engage with the second fixing tooth 33, and automatically locking the cleaning frame 41 onto the displacement frame 3. When the billet 8 passes by, the positioning nozzle 42 uses a large-angle water flow for initial descaling and maintains centering, while the cleaning nozzle 43 uses a small-angle water flow for deep descaling. Debris is guided out by the baffle 6 with the water flow. After the billet 8 leaves, the baffle 6 resets, the adjusting rod 73 cuts off the water pressure, the fixed block 412 retracts and unlocks under the action of the tension spring, the sealing plate 423 resets, and the device returns to the calibration state, entering the next cycle.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hot rolling device for reinforcing bars, characterized in that: The equipment includes a descaling box (1) and a hot rolling mill (2) arranged sequentially along the processing direction of the billet (8); a displacement frame (3) is slidably arranged inside the descaling box (1); multiple cleaning units (4) are slidably arranged on the displacement frame (3) along the radial direction of the billet (8); multiple positioning units (5) are slidably arranged inside the descaling box (1) along the radial direction of the billet (8); a guide roller (11) is rotatably arranged inside the descaling box (1); a drive motor (12) is arranged on the descaling box (1); the power output end of the drive motor (12) is coaxially connected to the guide roller (11); the positioning unit (5), the cleaning unit (4) and the guide roller (11) are arranged sequentially along the processing direction of the billet (8); a baffle (6) is slidably connected to the positioning unit (5); the baffle (6) has a receiving part (61); the receiving part (61) is directly opposite the cleaning unit (4).

2. The hot rolling device for reinforcing bars according to claim 1, characterized in that: The positioning unit (5) includes a positioning seat (51) and a positioning roller (52); the positioning seat (51) is slidably disposed in the descaling box (1) along the radial direction of the billet (8); the positioning roller (52) is rotatably disposed on the positioning seat (51); the positioning roller (52) abuts against the side wall of the billet (8).

3. A hot rolling device for reinforcing bars according to claim 2, characterized in that: The positioning seat (51) has an inclined sliding hole; the baffle (6) is provided with a first sliding rod (62); the first sliding rod (62) is slidably disposed in the sliding hole; a second elastic element (63) is sleeved on the first sliding rod (62); the second elastic element (63) is located between the baffle (6) and the positioning seat (51); the second elastic element (63) is used to provide a force for the baffle (6) to move away from the positioning seat (51).

4. A hot rolling device for reinforcing bars according to claim 2, characterized in that: The positioning unit (5) further includes a gear (53), a rack (54), and a plurality of second slide rods (55); the gear (53) is coaxially connected to the positioning roller (52); the rack (54) is slidably disposed on the positioning seat (51); the gear (53) meshes with the rack (54); the plurality of second slide rods (55) are respectively slidably disposed on the rack (54); one end of the plurality of second slide rods (55) is connected to the baffle (6).

5. A hot rolling device for reinforcing bars according to claim 2, characterized in that: The positioning seat (51) is provided with a plurality of guide rods (511); a plurality of first elastic elements (512) are respectively sleeved on the plurality of guide rods (511); the first elastic elements (512) are located between the positioning seat (51) and the descaling box (1); the first elastic elements (512) are used to provide the positioning seat (51) to approach the billet (8).

6. A hot rolling device for reinforcing bars according to claim 5, characterized in that: An isolation sleeve (513) is provided on the positioning seat (51); the isolation sleeve (513) is fitted around the periphery of the plurality of guide rods (511).

7. A hot-rolling apparatus for reinforcing bars according to claim 1, characterized in that: The cleaning unit (4) includes a water supply source, a cleaning frame (41), and a positioning nozzle (42) and multiple cleaning nozzles (43) mounted on the cleaning frame (41). The cleaning frame (41) is slidably mounted on the displacement frame (3) along the radial direction of the billet (8). The water supply source is connected to the positioning nozzle (42). A positioning plate (31) is mounted on the displacement frame (3). The positioning nozzle (42) has a first water outlet (421) facing the receiving part (61) and a second water outlet (422) facing the positioning plate (31). A water pipe (431) is connected between the positioning nozzle (42) and the multiple cleaning nozzles (43). A sealing plate (423) is rotatably mounted inside the positioning nozzle (42). After rotation, the sealing plate (423) is used to block the second water outlet (422) or the water pipe (431).

8. A hot rolling device for reinforcing bars according to claim 7, characterized in that: The displacement frame (3) is provided with a sliding groove (32); the cleaning frame (41) is provided with a slider (411); the slider (411) is slidably disposed in the sliding groove (32); the slider (411) is provided with a fixing groove; two fixing blocks (412) are slidably disposed in the fixing groove; the fixing blocks (412) are provided with a first fixing tooth (4121); the displacement frame (3) is provided with two sets of second fixing teeth (33); after the two sets of fixing blocks (412) slide, the two sets of first fixing teeth (4121) respectively mesh with the two sets of second fixing teeth (33).

9. A hot rolling device for reinforcing bars according to claim 8, characterized in that: A transmission cavity (413) is provided between the two fixed blocks (412); an adjustment seat (7) is provided on the slider (411); an adjustment hole (71) is provided in the adjustment seat (7); the transmission cavity (413) is connected to the adjustment hole (71); the adjustment hole (71) is connected to the water supply source through an adjustment pipe (72); an adjustment rod (73) is slidably provided in the adjustment hole (71); a connection hole (731) is provided on the adjustment rod (73); after the adjustment rod (73) slides, the connection hole (731) is connected to or misaligned with the transmission cavity (413) and the adjustment pipe (72).

10. A hot rolling device for reinforcing bars according to claim 9, characterized in that: The adjusting rod (73) is provided with a linkage groove (732); the baffle (6) is provided with a linkage rod (64); the linkage rod (64) passes through the linkage groove (732) along the radial direction of the steel billet (8).

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