A turnover device for improving the uniformity of billet heating

Abstract

This invention provides a turning device to improve the heating uniformity of steel billets. The turning device includes turning assemblies symmetrically arranged on both longitudinal side walls of a heating furnace. Each turning assembly includes a top shaft, a pushing assembly, bearings, gears, a rack, and a drive device. The top shaft penetrates the longitudinal side wall of the heating furnace, with a groove at its inner end for securing the end of the steel billet. Its outer end is rotatably connected to the pushing assembly, and the pushing assembly enables the top shaft to move along the X-axis. The bearings and gears are slidably mounted on the top shaft, and the inner rings of the gears and bearings rotate synchronously with the top shaft. The gear meshes with the rack. The drive device is used to drive the bearings and rack to move synchronously along the Z-axis and to drive the rack to move independently along the Z-axis. This invention solves the problems of uneven heating of steel billets and the formation of black marks at contact points.

Description

Technical Field

[0001] This invention relates to the field of steel rolling heating technology, and more specifically to a turning device for improving the heating uniformity of steel billets. Background Technology

[0002] The steel rolling reheating furnace is one of the key pieces of equipment in the steel smelting process. It is responsible for reheating the steel billets and ingots formed by the crystallization and condensation of molten steel to a uniform temperature suitable for rolling (generally around 1200℃). Through the heating action of the furnace, firstly, the plasticity of the steel is increased, and the resistance to deformation is reduced, making the steel easier to deform. Secondly, heating improves the internal structure and properties of the steel billet, homogenizing the uneven structure and non-metallic inclusions through diffusion at high temperatures. Therefore, the steel rolling heating process is a crucial link in the steel rolling production process, and the uniformity of the billet heating temperature directly affects the quality of the rolled steel. How to further improve the uniformity of the billet heating temperature within the steel rolling furnace has become a pressing technical challenge for industry practitioners.

[0003] The heat transfer of steel billets within a rolling mill heating furnace primarily occurs through radiation from the high-temperature furnace gas and furnace walls to the cold billets. The intensity of this radiation is closely related to the temperature difference between the cold and hot sources and the spatial radiation angle between them. Due to the large furnace space and numerous burners on the furnace walls, differences in flue gas and furnace wall temperatures can easily occur across the billet's upper, lower, left, and right sides. This results in less thermal radiation received by the billet in some directions compared to others, leading to uneven internal temperature distribution within the billet. In existing rolling mill heating furnace equipment, the movement of the billet within the furnace is typically achieved using a walking beam, pushing beam, or pipe-type device structure. Regardless of the specific mechanism, the billet's movement within the furnace, relative to the stationary furnace interior, is only a translational motion along the furnace axis. Therefore, this spatial unevenness in radiation intensity remains uncorrected, resulting in an uneven internal temperature distribution within the billet exiting the furnace. Meanwhile, the area where the billet contacts the supporting components, due to prolonged contact with the cold components, receives no radiant heat from the heat source and continuously dissipates heat to the cold supporting components through conduction. This results in a significantly lower temperature at the contact point compared to other areas, sometimes leading to noticeable black marks and affecting heating quality. Therefore, there is considerable room for improvement in the heating uniformity of billets in existing steel rolling furnace structures.

[0004] In summary, there is an urgent need for a turning device to improve the heating uniformity of steel billets, in order to solve the problems of poor heating uniformity of steel billets and severe black marks at the support contact points in the production process of existing steel rolling heating furnaces. Summary of the Invention

[0005] The purpose of this invention is to provide a turning device to improve the heating uniformity of steel billets, aiming to solve the problems of poor heating uniformity and severe black marks at the support contact area in existing steel rolling heating furnaces during production. The specific technical solution is as follows:

[0006] A turning device for improving the heating uniformity of steel billets, the turning device includes turning components symmetrically arranged on both longitudinal side walls of a heating furnace, the turning components including a top shaft, a jacking component, bearings, gears, racks and a drive device;

[0007] The top shaft is installed through the longitudinal side wall of the heating furnace. Its inner end is provided with a slot for locking the end of the steel billet. Its outer end is rotatably connected to the jacking assembly, and the top shaft moves along the X direction through the jacking assembly.

[0008] The bearing and gear are both slidably mounted on the top shaft. The inner rings of the gear and the bearing rotate synchronously with the top shaft. The gear meshes with the rack.

[0009] The drive device is used to drive the bearing and the rack to move synchronously along the Z-direction and to drive the rack to move independently along the Z-direction.

[0010] In a preferred embodiment of the above technical solution, the driving device includes a rotating base, a lifting base, and a telescopic driving component for driving the rotating base and the lifting base to move synchronously along the X-axis; the lower end of the rack is in rolling contact with the upper surface of the rotating base via a second roller, and the movement of the rack in the Z-axis is controlled by the contour change of the upper surface of the rotating base; the outer ring of the bearing is connected to a lifting push rod, the lower end of the lifting push rod is in rolling contact with the upper surface of the lifting base via a first roller, and the movement of the bearing in the Z-axis is controlled by the contour change of the upper surface of the lifting base.

[0011] In a preferred embodiment of the above technical solution, the upper surface contour of the rotating base includes a rotating base inclined section II, a rotating base inclined section III, and a rotating base inclined section V arranged sequentially; the upper surface contour of the lifting base includes a lifting base inclined section II corresponding to the rotating base inclined section II, a lifting base horizontal section III corresponding to the rotating base inclined section III, and a lifting base inclined section V corresponding to the rotating base inclined section V; wherein: the tilt angle and interval length of the rotating base inclined section II and the lifting base inclined section II are the same, the tilt angle and interval length of the rotating base inclined section V and the lifting base inclined section V are the same, and the tilt directions of the rotating base inclined section II and the rotating base inclined section V are opposite.

[0012] In the preferred embodiment of the above technical solutions, the inclined angles of the inclined section II and the inclined section III of the rotating base are the same.

[0013] In a preferred embodiment of the above technical solution, the upper surface contour of the rotating base further includes a horizontal segment I of the rotating base and a horizontal segment VI of the rotating base located at both ends, and the upper surface contour of the lifting base further includes a horizontal segment I of the lifting base corresponding to the horizontal segment I of the rotating base and a horizontal segment VI of the lifting base corresponding to the horizontal segment VI of the rotating base.

[0014] In a preferred embodiment of the above technical solution, the upper surface profile of the rotating base further includes a horizontal section IV of the rotating base disposed between the inclined section III and the inclined section V of the rotating base, and the upper surface profile of the lifting base further includes a horizontal section IV of the lifting base disposed corresponding to the horizontal section IV of the rotating base, wherein the horizontal section IV of the lifting base and the horizontal section III of the lifting base are flush.

[0015] In a preferred embodiment of the above technical solutions, the jacking assembly includes an intermediate connecting rod and a jacking power component. One end of the intermediate connecting rod is connected to the jacking power component, and the other end is rotatably connected to the outer end of the jacking shaft. The jacking power component is mounted on a Z-axis slide rail.

[0016] In the preferred embodiment of the above technical solution, the outer end of the top shaft is provided with a ball bearing portion, and the end of the intermediate connecting rod is provided with a ball head. The ball head is disposed in the ball bearing portion, so that the top shaft can rotate around the X direction.

[0017] In the preferred embodiment of the above technical solutions, both the rotating base and the lifting base move along the X-direction via an X-direction slide rail.

[0018] In the preferred embodiment of the above technical solutions, the heating furnace is arranged with multiple sets of tilting devices at intervals along the Y direction.

[0019] The application of the technical solution of the present invention has the following beneficial effects:

[0020] The flipping device of this invention enables the periodic flipping of steel billets in the heating furnace, solving the problems of uneven heating and black marks at the support contact points during the billet heating process. It plays a positive role in improving the heating quality of the heating furnace and improving the rolling performance of steel. The upper surface contours of the rotating base and the lifting base are specifically designed, enabling the lifting, flipping, and lowering of the billet to be completed with only one telescopic drive component, reducing the complexity of the structure and the energy consumption of the equipment. Both ends of the rotating base and the lifting base are designed with horizontal sections to support the top shaft, which can prevent the top shaft from forming a cantilever beam, ensuring that the top shaft will not deform or break, and also ensuring a stable support effect for the steel billet.

[0021] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of an existing steel rolling heating furnace;

[0024] Figure 2 yes Figure 1 Sectional view at point AA;

[0025] Figure 3 This is a schematic diagram of the structure of the flipping component in the flipping device of the present invention;

[0026] Figure 4 yes Figure 3 A cross-sectional view of the flip component perpendicular to the X-axis;

[0027] Figure 5 This is a diagram showing the correspondence between the outlines of the rotating base and the lifting base in this invention and the working conditions of the top shaft;

[0028] Figure 6 This is a top view of the heating furnace after the addition of a tilting device in this invention;

[0029] The components include: 1. Furnace wall, 2. Steel inlet, 3. Steel outlet, 4. Heating burner, 5. Movable column, 6. Fixed column, 7. Movable longitudinal beam, 8. Fixed longitudinal beam, 9. Steel billet, 10. Top shaft, 10.1. Slot, 10.2. Ball bearing, 11. Bearing, 12. Gear, 13. Intermediate connecting rod, 13.1. Ball head, 14. Pushing power component, 15. Z-axis slide rail, 16. Telescopic drive component, 17. Push rod, 18. Rotating base, 19. Lifting base, 20. X-axis slide rail, 21. Lifting push rod, 22. Roller one, 23. Rack, 24. Roller two. Detailed Implementation

[0030] To facilitate understanding of the present invention, a more complete description is provided below, along with preferred embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0032] Example 1:

[0033] Figure 1 and Figure 2 This is a schematic diagram of the structure of an existing steel rolling heating furnace. The heating furnace includes a furnace wall 1, a steel inlet 2, a steel outlet 3, a heating burner 4, a movable column 5, a fixed column 6, a movable longitudinal beam 7, and a fixed longitudinal beam 8. The furnace wall 1 consists of a cuboid furnace chamber space enclosed by six furnace walls: upper, lower, left, right, front, and rear. The feeding direction of the steel billet in the heating furnace (i.e., the length direction of the heating furnace) is defined as the Y direction (i.e., longitudinal), the width direction of the heating furnace is defined as the X direction (i.e., transverse), and the height direction of the heating furnace is defined as the Z direction (i.e., vertical).

[0034] The furnace walls on the inlet and outlet sides are respectively equipped with inlet 2 and outlet 3 for steel billets 9 to enter and exit the furnace chamber. Several heating burners 4 are installed on the side walls (i.e., side walls), and the high-temperature flue gas generated by the combustion of the heating burners 4 heats the furnace chamber space and the steel billets inside. At the bottom of the furnace, several rows of movable columns 5 and fixed columns 6, which can move in four directions (i.e., along the Y and Z directions), are alternately arranged. Horizontal movable longitudinal beams 7 and fixed longitudinal beams 8 are respectively installed on the movable columns 5 and fixed columns 6. The cold steel billets to be heated are placed on the movable and fixed longitudinal beams at certain intervals.

[0035] During production, cold billets awaiting heating are loaded into the furnace chamber through the inlet 2 on the inlet side and initially placed at the starting ends of the movable longitudinal beam 7 and the fixed longitudinal beam 8. When the billet is stationary, the movable longitudinal beam 7 and the fixed longitudinal beam 8 jointly support the billet. When the billet needs to move forward, the movable column 5 first moves the movable longitudinal beam upward, lifting the billet. At this point, the billet is no longer in contact with the fixed longitudinal beam, and the billet is supported only by the movable longitudinal beam. Then, the movable column 5 moves the movable longitudinal beam 7 forward (towards the tapping side), shifting the billet's spatial position forward. After this forward movement, the movable column moves the movable longitudinal beam downward, and the billet moves downward as well, until it contacts the fixed longitudinal beam. At this point, the support for the billet is again provided by both the movable and fixed longitudinal beams. The movable column 5 then moves the movable longitudinal beam 7 further downward. Due to the support of the fixed longitudinal beam, the billet is no longer in contact with the movable longitudinal beam, and the support for the billet is now provided solely by the fixed longitudinal beam 8. Next, the movable column 5 drives the movable longitudinal beam 7 backward to its initial position and then upward to be level with the fixed longitudinal beam. Through these actions, the billet moves forward once within the heating furnace. By alternating these actions, the billet moves from the furnace inlet to the outlet. During this movement, the cold billet continuously receives heat from the hot combustion gases and the furnace walls via radiation, causing its temperature to rise. By adjusting the billet's speed and combustion temperature within the furnace, the billet exits the furnace at the required process temperature, thus achieving proper heating.

[0036] Existing steel rolling heating furnaces have the following two shortcomings:

[0037] 1) The radiant temperature of different surfaces of the steel billet is inconsistent, resulting in uneven heating inside the billet:

[0038] like Figure 1As shown, except for the two small faces at the ends of the billet, the main heating surfaces of the billet can be divided into four sides, A to D. The radiant surfaces corresponding to sides A to D of the billet are the top surface of the furnace, the adjacent (left) side of the billet, the bottom surface of the furnace, and the adjacent (right) side of the billet, respectively. The heating of the billet in the furnace mainly relies on thermal radiation (over 90%), and the heat transfer intensity is proportional to the fourth power of the temperature of the radiant surface. Therefore, the temperature of the radiant surface directly affects the heat transfer intensity. However, the temperatures of the top surface, bottom surface, and adjacent side of the billet are usually not the same, typically with the top surface temperature > bottom surface temperature > adjacent side of the billet temperature. This results in different heat transfer intensities on the four sides of the billet. In existing steel rolling furnace technology, from the time the billet enters the furnace to its discharge after heating, the billet only undergoes one state of motion: translation. The radiant surfaces corresponding to sides A to D do not exchange or change throughout the entire heating cycle. This results in the billet's A and C surfaces receiving strong heat and rising rapidly, while its B and D surfaces receive weak heat and rise slowly; the billet is heated unevenly in all directions, affecting subsequent processes.

[0039] 2) The contact point between the steel billet and the bottom support is fixed, resulting in black marks at the contact point, which affects the quality of the steel billet:

[0040] The billet moves forward through the cooperation of the movable longitudinal beams and columns. Both the movable longitudinal beams and columns are equipped with cooling structures to prevent overheating and damage. Therefore, the temperature of the movable longitudinal beams and columns is much lower than that of the furnace wall and the billet as a whole. However, in existing rolling mill heating furnace technology, the contact position between the billet and the columns and movable longitudinal beams remains unchanged throughout the heating process. This results in the temperature at the support point being much lower than the overall temperature of the billet, producing obvious black marks at the contact point and severely affecting the quality of the billet.

[0041] To address the problems existing in current steel rolling heating methods, this embodiment provides a turning device to improve the heating uniformity of steel billets, such as... Figures 3-6 As shown.

[0042] The tilting device includes tilting components symmetrically arranged on both longitudinal side walls of the heating furnace. The tilting components include a top shaft 10, a jacking component, a bearing 11, a gear 12, a rack 23, and a drive device.

[0043] The top shaft 10 is installed through the longitudinal side wall of the heating furnace. Its inner end is provided with a slot 10.1 for locking the end of the steel billet 9. Its outer end is rotatably connected to the jacking assembly, and the top shaft 10 moves along the X direction through the jacking assembly. Specifically, the inner end of the top shaft 10 refers to the end of the top shaft located inside the heating furnace, and its outer end refers to the end of the top shaft located outside the heating furnace.

[0044] Both the bearing 11 and the gear 12 are slidably mounted on the top shaft 10 (i.e., the bearing 11 and gear 12 do not change position when the top shaft moves along the X direction; specifically, a splined shaft can be used to achieve a sliding connection). The gear 12 and the inner ring of the bearing 11 rotate synchronously with the top shaft 10, and the gear 12 meshes with the rack 23, which can drive the gear to rotate, thereby causing the top shaft 10 to rotate around the X direction. As those skilled in the art know, the bearing 11 includes an inner ring, an outer ring, a cage, and balls, wherein the inner ring and the outer ring are coaxially arranged and the cage and balls are disposed between them, and the inner ring and the outer ring can rotate relative to each other.

[0045] The drive device is used to drive the bearing 11 and the rack 23 to move synchronously along the Z direction, and to drive the rack 23 to move independently along the Z direction.

[0046] The synchronous movement of the drive bearing 11 and rack 23 is to enable the top shaft 10 to move along the Z-axis, thereby detaching the billet from the supporting components (here, the supporting components refer to the columns and longitudinal beams in the heating furnace) and placing it in a suspended state. The synchronous movement of the rack and bearing also prevents the top shaft 10 from rotating during its ascent. If the ascent and rotation of the top shaft 10 occur simultaneously, the billet to be rotated will interfere with the lower supporting components, preventing the billet from rotating or being lifted. The drive rack 23 moving independently along the Z-axis enables the top shaft 10 to rotate while carrying the suspended billet, achieving the effect of billet flipping. In this embodiment, during the billet flipping process, the lifting and rotation of the top shaft 10 have a sequential order: the drive device must first drive the bearing 11 and rack 23 to move synchronously along the Z-axis to lift the top shaft 10, and then drive the rack 23 independently along the Z-axis to rotate the top shaft 10.

[0047] Furthermore, the slot 10.1 is shaped to match the end shape of the billet 9. In this embodiment, the billet is a square billet, and the slot 10.1 is also a square cavity structure so that the slot can hold the end of the billet. The jacking assembly drives the jacking shaft 10 to jack along the X direction, so that the slot 10.1 holds and presses the end of the billet 9. The two sets of flipping assemblies hold and press the two ends of the billet respectively, so as to realize the subsequent billet lifting and flipping action.

[0048] See Figure 3 and Figure 4The driving device includes a rotating base 18, a lifting base 19, and a telescopic drive member 16 for driving the rotating base 18 and the lifting base 19 to move synchronously in the X direction. The lower end of the rack 23 rolls in contact with the upper surface of the rotating base 18 via a second roller 24, and the movement of the rack in the Z direction is controlled by the contour change of the upper surface of the rotating base 18. The outer ring of the bearing 11 is connected to a lifting push rod 21, and the lower end of the lifting push rod 21 rolls in contact with the upper surface of the lifting base 19 via a first roller 22, and the movement of the bearing in the Z direction is controlled by the contour change of the upper surface of the lifting base 19. The rotating base 18, the lifting base 19, the lifting push rod 21, and the rack 23 also provide support for the top shaft 10, preventing deformation or breakage of the top shaft 10 during suspension.

[0049] Furthermore, the jacking assembly includes an intermediate connecting rod 13 and a jacking power component 14. One end of the intermediate connecting rod 13 is connected to the jacking power component 14, and the other end is rotatably connected to the outer end of the jacking shaft 10. The jacking power component 14 is mounted on a Z-axis slide rail 15, and the jacking shaft 10 slides in the Z-axis direction in cooperation with the Z-axis slide rail 15.

[0050] Furthermore, both the rotating base 18 and the lifting base 19 achieve movement along the X-direction via the X-direction slide rail 20. Specifically, both the rotating base 18 and the lifting base 19 are connected to the output end of the telescopic drive component 16 via push rods 17, and the movement of the rotating base 18 and the lifting base 19 is guided by the X-direction slide rail 20. In particular, the rotating base 18 and the lifting base 19 can each be equipped with the X-direction slide rail 20 to address the issue that the rack 23 and the lifting push rod 21 are not aligned in the actual structural design.

[0051] Furthermore, the outer end of the top shaft 10 is provided with a ball bearing portion 10.2, and the end of the intermediate connecting rod 13 is provided with a ball head 13.1. The ball head 13.1 is disposed in the ball bearing portion 10.2, enabling the top shaft 10 to rotate around the X direction. In this embodiment, the fit between the ball bearing portion and the ball head only allows the top shaft 10 to rotate around the X direction, and it is necessary to restrict translation and rotation in other directions. Wear-resistant, lubricating materials or structural layers (such as bearing bushes) can be provided on the inner wall of the ball bearing portion to ensure that the top shaft 10 can rotate smoothly. The rotation between the top shaft 10 and the intermediate connecting rod is achieved through a spherical structure, which can increase the contact area at the rotation point and reduce the pressure on the rotation point. Secondly, this rotating structure is far away from the heating furnace, which can keep it away from the high-temperature environment and extend its service life. Preferably, in some embodiments, standard bearings may be used to realize the rotational connection between the top shaft 10 and the intermediate connecting rod 13, such as tapered roller bearings.

[0052] Furthermore, in order to achieve the lifting and rotation of the top shaft 10, the contours of the upper surfaces of the rotating base 18 and the lifting base 19 in this embodiment are set as follows:

[0053] See Figure 5 The upper surface contour of the rotating base 18 includes a rotating base inclined section II, a rotating base inclined section III, and a rotating base inclined section V arranged sequentially; the upper surface contour of the lifting base 19 includes a lifting base inclined section II corresponding to the rotating base inclined section II, a lifting base horizontal section III corresponding to the rotating base inclined section III, and a lifting base inclined section V corresponding to the rotating base inclined section V.

[0054] The inclined sections II and V of the rotating base and the lifting base have the same inclination angle and length, and the inclined sections V of the rotating base and the lifting base have the same inclination angle and length. The inclined directions of the inclined sections II and V are opposite, ensuring that during the movement of the rotating base and the lifting base in the X direction, the rack 23 and the bearing 11 move at the same speed in the Z direction (i.e., the gear will not rotate). This allows for the lifting and lowering of the top shaft 10, i.e., lifting the billet to await flipping and, after flipping, placing the billet back onto the support component. The inclined section III of the rotating base is correspondingly set to the horizontal section III of the lifting base. When roller 1 22 and roller 2 24 land on the horizontal section III of the lifting base and the inclined section III of the rotating base, respectively, the top shaft will not continue to lift, and only the rack 23 moves relative to the gear 12, thus allowing the top shaft to rotate. With this setup, the billet can be first lifted and suspended in the air, then flipped over, and finally the flipped billet is placed back onto the support component.

[0055] Preferably, in this embodiment, the tilt angles of the inclined section II and the inclined section III of the rotating base are consistent to ensure the stability of the roller 24 during movement. Of course, it is not necessary for the inclined sections II and III of the rotating base to have consistent tilt angles. The purpose of the inclined section III is to enable the rack 23 to move independently, thereby rotating the top shaft. Therefore, as long as the horizontal section III of the lifting base corresponds to the inclined section III, the top shaft 10 can remain in the Z-direction position while rotating only around the X-direction. Furthermore, the length of the inclined section III is related to the required rotation angle of the top shaft 10. Those skilled in the art can set the length and tilt angle of the inclined section III based on the parameter settings between the gear 12 and the rack 23, as well as the angle at which the billet needs to be flipped. Preferably, the flipping device in this embodiment can achieve a 90° or 180° flip of the billet to achieve the effect of flipping the billet.

[0056] Furthermore, the upper surface contour of the rotating base 18 also includes a horizontal section IV of the rotating base disposed between the inclined section III and the inclined section V of the rotating base, and the upper surface contour of the lifting base 19 also includes a horizontal section IV of the lifting base corresponding to the horizontal section IV of the rotating base, wherein the horizontal section IV of the lifting base is flush with the horizontal section III of the lifting base. The horizontal section IV of the rotating base and the horizontal section IV of the lifting base are provided to provide a transition time, avoiding the immediate execution of the descent action after the top shaft 10 has just completed its rotation, making the boundary between the two actions clear, and also avoiding the impact caused by the roller 24 switching directly from the inclined section III of the rotating base to the inclined section V of the rotating base, ensuring that the billet is in a relatively static state after flipping before performing the descent action, thus ensuring the stability of the action. Furthermore, the interval length of the horizontal section IV of the rotating base and the horizontal section IV of the lifting base can be set according to the actual situation. Of course, in some embodiments, the horizontal section IV of the rotating base and the horizontal section IV of the lifting base may not be provided, and the required billet flipping effect can still be achieved.

[0057] Furthermore, the upper surface contour of the rotating base 18 also includes a horizontal section I and a horizontal section VI of the rotating base located at both ends, and the upper surface contour of the lifting base 19 also includes a horizontal section I of the lifting base corresponding to the horizontal section I of the rotating base and a horizontal section VI of the lifting base corresponding to the horizontal section VI of the rotating base. The arrangement of the horizontal sections I and VI of the rotating base, as well as the horizontal sections I and VI of the lifting base, is to provide a supporting force to the top shaft 10 through the rack 23, the lifting push rod 21, the first roller 22, and the second roller 24 before the billet is lifted and after the billet is lowered, so as to avoid the top shaft forming a cantilever beam, and at the same time reduce the force on the Z-axis slide rail and extend the service life of the Z-axis slide rail.

[0058] In this embodiment, the upper surface contour of the rotating base sequentially includes a horizontal segment I, a sloping segment II, a sloping segment III, a horizontal segment IV, a sloping segment V, and a horizontal segment VI. Correspondingly, the upper surface contour of the lifting base sequentially includes a horizontal segment I, a sloping segment II, a horizontal segment III, a horizontal segment IV, a sloping segment V, and a horizontal segment VI. Of course, in some embodiments, the upper surface contour of the rotating base may not include the horizontal segment IV, and correspondingly, the upper surface contour of the lifting base may not include the horizontal segment IV.

[0059] It should be noted that the changes in the contour lines of the rotating base 18 and the lifting base 19 during their advancement along the X-axis can be... Figure 5 The trend of change from left to right in the middle can also be... Figure 5 The trend of change from right to left in the middle.

[0060] like Figure 6 As shown in the figure, the heating furnace described in this embodiment is arranged with multiple sets of turning devices at intervals along the Y direction, which can realize the periodic turning of the steel billet in the heating furnace and solve the problems of uneven heating of the steel billet and black marks appearing at the contact support position.

[0061] Preferably, the inner wall of the heating furnace can be equipped with a detection device for detecting the position of the steel billet. When the steel billet reaches the working position of the top shaft 10, the feeding movement of the steel billet is stopped, and the top shaft 10 is waited for to move.

[0062] Preferably, in this embodiment, the jacking power component 14 and the telescopic drive component 16 are both one of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0063] The trend of the outline changes of the rotating base 18 and the lifting base 19 is as follows: Figure 5 Taking the example from left to right, the working principle of the flipping device in this embodiment is as follows:

[0064] 1) When the billet 9 in the heating furnace moves to the working position of the top shaft 10, the feeding movement of the billet is stopped;

[0065] 2) The top shaft 10 in the two-sided flipping assembly clamps and tightens the two ends of the billet under the drive of the jacking assembly;

[0066] 3) The initial position of roller 22 is on the horizontal section I of the lifting base, and the initial position of roller 24 is on the horizontal section I of the rotating base. When the telescopic drive 16 drives the rotating base 18 and the lifting base 19 to extend synchronously along the X direction, the rotating base 18 and the lifting base 19 begin to move. When roller 22 moves to the inclined section II of the lifting base and roller 24 moves to the inclined section II of the rotating base, the rack 23 and the bearing 11 move synchronously upward along the Z direction, realizing the lifting action of the top shaft 10 carrying the steel billet. When roller 22 moves to the horizontal section III of the lifting base and roller 24 moves to the inclined section III of the rotating base, the top shaft 10 stops lifting, and only the rack 23 continues to move along the Z direction. The top shaft 10 is driven to rotate, carrying the steel billet, to complete the flipping action. When roller 22 moves to the horizontal section IV of the lifting base and roller 24 moves to the horizontal section IV of the rotating base, the top shaft 10 stops rotating. When roller 22 moves to the inclined section V of the lifting base and roller 24 moves to the inclined section V of the rotating base, the rack 23 and the bearing move downward in the Z direction in sync, so that the top shaft 10 carries the steel billet down, and the steel billet is supported again by the support components in the heating furnace. When roller 22 moves to the horizontal section VI of the lifting base and roller 24 moves to the horizontal section VI of the rotating base, the top shaft 10 and the steel billet are in a stationary state, and the extension movement of the telescopic drive 16 ends.

[0067] 4) The top shaft 10 retracts under the drive of the clamping assembly, and the top shaft 10 separates from the billet 9;

[0068] 5) The telescopic drive component 16, along with the rotating base 18 and the lifting base 19, moves back to the initial position in the X direction. Roller 1 22 passes through the horizontal section VI, the inclined section V, the horizontal section IV, the horizontal section III, the inclined section II, and the horizontal section I of the lifting base in sequence. Roller 24 passes through the horizontal section VI, the horizontal section IV, the inclined section V, the inclined section III, the inclined section II, and the horizontal section I of the rotating base in sequence. The top shaft 10 undergoes lifting, reverse rotation, and lowering actions, waiting for the next billet 9 flipping action.

[0069] 6) By repeating the above steps 1)-5), each steel billet that has passed through the flipping device is flipped over.

[0070] Example 2:

[0071] In this embodiment, the driving device consists of two telescopic components. One telescopic component is fixedly connected to the outer ring of the bearing 11 to push the bearing 11 and the top shaft 10 to move along the Z direction. The other telescopic component is fixedly connected to the lower end of the rack 23 to push the rack 23 to move along the Z direction. Similarly, when it is necessary to lift and lower the top shaft 10, the two telescopic components need to move synchronously. When it is necessary to rotate the top shaft 10, only the telescopic component connected to the rack 23 needs to extend and retract.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A turning device for improving the heating uniformity of steel billets, characterized in that, The flipping device includes flipping components symmetrically arranged on both longitudinal side walls of the heating furnace. The flipping components include a top shaft (10), a jacking component, a bearing (11), a gear (12), a rack (23), and a driving device. The top shaft (10) is installed through the longitudinal side wall of the heating furnace. Its inner end is provided with a slot (10.1) for locking the end of the steel billet (9). Its outer end is rotatably connected to the jacking assembly, and the top shaft (10) moves along the X direction through the jacking assembly. The bearing (11) and gear (12) are both slidably mounted on the top shaft (10). The inner rings of the gear (12) and the bearing (11) rotate synchronously with the top shaft (10). The gear (12) meshes with the rack (23). The drive device is used to drive the bearing (11) and the rack (23) to move synchronously along the Z direction and to drive the rack (23) to move along the Z direction individually.

2. The turning device for improving the heating uniformity of steel billets according to claim 1, characterized in that, The driving device includes a rotating base (18), a lifting base (19), and a telescopic drive member (16) for driving the rotating base (18) and the lifting base (19) to move synchronously in the X direction; the lower end of the rack (23) is in rolling contact with the upper surface of the rotating base (18) through roller two (24), and the movement of the rack (23) in the Z direction is controlled by the contour change of the upper surface of the rotating base (18); the outer ring of the bearing (11) is connected to a lifting push rod (21), the lower end of the lifting push rod (21) is in rolling contact with the upper surface of the lifting base (19) through roller one (22), and the movement of the bearing (11) in the Z direction is controlled by the contour change of the upper surface of the lifting base (19).

3. The turning device for improving the heating uniformity of steel billets according to claim 2, characterized in that, The upper surface profile of the rotating base (18) includes a rotating base inclined section II, a rotating base inclined section III, and a rotating base inclined section V arranged sequentially; the upper surface profile of the lifting base (19) includes a lifting base inclined section II corresponding to the rotating base inclined section II, a lifting base horizontal section III corresponding to the rotating base inclined section III, and a lifting base inclined section V corresponding to the rotating base inclined section V; wherein: the tilt angle and interval length of the rotating base inclined section II and the lifting base inclined section II are the same, the tilt angle and interval length of the rotating base inclined section V and the lifting base inclined section V are the same, and the tilt directions of the rotating base inclined section II and the rotating base inclined section V are opposite.

4. The turning device for improving the heating uniformity of steel billets according to claim 3, characterized in that, The inclined angles of the inclined section II and the inclined section III of the rotating base are the same.

5. The turning device for improving the heating uniformity of steel billets according to claim 3, characterized in that, The upper surface profile of the rotating base (18) also includes a horizontal section I of the rotating base and a horizontal section VI of the rotating base located at both ends. The upper surface profile of the lifting base (19) also includes a horizontal section I of the lifting base corresponding to the horizontal section I of the rotating base and a horizontal section VI of the lifting base corresponding to the horizontal section VI of the rotating base.

6. The turning device for improving the heating uniformity of steel billets according to claim 5, characterized in that, The upper surface profile of the rotating base (18) also includes a horizontal section IV of the rotating base disposed between the inclined section III and the inclined section V of the rotating base, and the upper surface profile of the lifting base (19) also includes a horizontal section IV of the lifting base disposed corresponding to the horizontal section IV of the rotating base, wherein the horizontal section IV of the lifting base and the horizontal section III of the lifting base are flush.

7. The turning device for improving the heating uniformity of steel billets according to claim 1, characterized in that, The jacking assembly includes an intermediate connecting rod (13) and a jacking power component (14). One end of the intermediate connecting rod (13) is connected to the jacking power component (14), and the other end is rotatably connected to the outer end of the jacking shaft (10). The jacking power component (14) is mounted on the Z-axis slide rail (15).

8. The turning device for improving the heating uniformity of steel billets according to claim 7, characterized in that, The outer end of the top shaft (10) is provided with a ball bearing portion (10.2), and the end of the intermediate connecting rod (13) is provided with a ball head (13.1). The ball head (13.1) is located in the ball bearing portion (10.2), so that the top shaft (10) can rotate around the X direction.

9. The turning device for improving the heating uniformity of steel billets according to claim 2, characterized in that, Both the rotating base (18) and the lifting base (19) move along the X direction via the X-axis slide rail (20).

10. The turning device for improving the heating uniformity of steel billets according to any one of claims 1-9, characterized in that, The heating furnace is arranged with multiple sets of tilting devices at intervals along the Y direction.

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