A continuous casting device for steel billets

Abstract

This invention relates to the field of continuous casting technology, and in particular to a continuous casting apparatus for steel billets. The apparatus includes a tundish, with multiple continuous casting molds arranged below the tundish. A heat-conducting frame is fixedly connected inside each continuous casting mold. A straightening machine is installed below each continuous casting mold. Multiple immersion water pipes are fixedly connected to the bottom of the tundish, with the bottom ends of each pipe located inside a corresponding heat-conducting frame. Annular slag storage boxes are slidably inserted into the surface of each immersion water pipe. These annular slag storage boxes are fixedly connected above the corresponding continuous casting molds, and a baffle ring is fixedly connected to the bottom opening of the annular slag storage box. In this invention, each time the continuous casting mold undergoes an arc-like vibration in the up-down direction, the continuous casting protective slag completes one feeding cycle, thereby synchronizing the feeding frequency of the protective slag with the vibration frequency of the continuous casting mold. This allows for precise matching between the billet casting speed and the replenishment of the protective slag, improving the utilization rate of the protective slag.

Description

Technical Field

[0001] This invention relates to the field of continuous casting technology, and more particularly to a continuous casting apparatus for steel billets. Background Technology

[0002] Continuous casting equipment is a key piece of equipment in metallurgical engineering for continuously casting liquid metal into shapes. It mainly consists of a ladle, tundish, crystallizer, secondary cooling device, and straightening machine. Continuous casting is a manufacturing process in which metal is melted into a liquid, then poured into a set of cooling equipment. As the metal partially solidifies, castings of a specific length and shape are pulled out from the other end of the cooling equipment.

[0003] Patent document CN112191816B discloses a continuous casting system for gradient steel materials, including a ladle, a tundish, a crystallizer, an immersion nozzle, and a straightening zone. The tundish is located below the ladle, the crystallizer is located below the tundish, the immersion nozzle is located between the ladle and the tundish and between the tundish and the crystallizer, and the straightening zone is fixedly installed at the lower end of the crystallizer. The straightening zone includes first straightening rolls, a steel billet, and connecting end caps. The first straightening rolls are equidistantly distributed on the outer surfaces of the upper and lower ends of the steel billet, and the connecting end caps are movably installed between the front and rear outer surfaces of the upper and lower first straightening rolls.

[0004] In existing technologies, molten steel is typically conveyed through a nozzle into the crystallizer and solidified through contact to form a strip-shaped steel billet with a specific cross-sectional structure. When the molten steel enters the crystallizer, protective slag needs to be continuously added to form a continuous liquid slag layer above the liquid surface. This layer is used to isolate air and form a lubricating film between the crystallizer wall and the solidified billet shell. Existing continuous casting devices typically use nozzles to spray the protective slag at fixed points, resulting in uneven diffusion of the protective slag on the molten steel surface and the formation of weak coverage areas. This can easily lead to longitudinal cracks at the corners of the steel billet. The amount and position of the protective slag spray are isolated and difficult to adjust effectively according to the billet casting speed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a continuous billet casting device.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a continuous casting device for steel billets, including a tundish, with multiple continuous casting crystallizers arranged below the tundish, a heat-conducting frame fixedly connected inside the continuous casting crystallizer, a straightening machine arranged below each continuous casting crystallizer, multiple immersion water pipes fixedly connected to the bottom of the tundish, the bottom ends of the multiple immersion water pipes being located inside the corresponding heat-conducting frames, an annular slag storage box slidably inserted into the surface of each immersion water pipe, the annular slag storage box being fixedly connected above the corresponding continuous casting crystallizer, a baffle ring being fixedly connected into the bottom opening of the annular slag storage box, the baffle ring being slidably inserted into the surface of the immersion water pipe, and multiple material dispensing holes being opened on the baffle ring;

[0007] The annular slag storage box is equipped with a connecting frame inside. Multiple sealing pins are fixedly connected to the bottom of the connecting frame. The bottom ends of the multiple sealing pins are located inside the corresponding material dispensing holes. The connecting frame is fixedly connected to the corresponding immersion water pipe. A slag dispersion component is set below the baffle ring. The immersion water pipe has an arc structure. The arc of the immersion water pipe is coaxial with the arc swing trajectory of the continuous casting crystallizer. The diameter of the baffle ring is larger than the diagonal length of the inner wall of the heat conduction frame.

[0008] The intermediate tundish is equipped with a water inlet sealing component, and a feeding pipe is installed above the annular slag storage box. A connecting pipe is fixedly connected to the top of the annular slag storage box, and the bottom end of the feeding pipe is slidably connected inside the connecting pipe. The curvature of the connecting pipe and the immersion water pipe is coaxial with the arc-shaped swing trajectory of the casting crystallizer.

[0009] Preferably, the slag dispersion component includes an annular guide rail, which is fixedly connected to the bottom of an annular slag storage box. A rotating ring is rotatably connected inside the annular guide rail, and multiple connecting shafts are rotatably connected to the rotating ring in the circumferential direction. Distributing blades are fixedly connected to the surface of each connecting shaft. An external gear ring is fixedly connected to the rotating ring. A motor is fixedly installed on the annular slag storage box, and a gear is fixedly connected to the output shaft of the motor. A clearance groove is provided on the annular guide rail, and one side of the gear extends along the clearance groove into the interior of the annular guide rail and meshes with the external gear ring.

[0010] Preferably, a conical wheel is fixedly connected to one end of the connecting shaft located inside the annular guide rail, and a bevel gear ring is fixedly connected inside the annular guide rail, with multiple conical wheels rotatably meshing on the bevel gear ring.

[0011] Preferably, a collection hopper is fixedly connected to the bottom of the annular guide rail. The collection hopper includes a circular guide section and a rectangular receiving section. The circular guide section is located at the top of the rectangular receiving section. The rectangular receiving section slides against the inner wall of the heat-conducting frame. A rectangular dividing hopper is fixedly connected to the inside of the collection hopper through a fixing frame. There is a gap between the rectangular dividing hopper and the rectangular receiving section. A baffle strip is slidably connected to each of the four sides of the rectangular receiving section. One side of the baffle strip passes through the rectangular receiving section and contacts and fits against one side of the rectangular dividing hopper. Movable components are provided on the baffle strip.

[0012] Preferably, the active component includes multiple fixed brackets, which are respectively fixedly connected to the corresponding immersion water pipes. Four guide frames are fixedly connected to the fixed brackets, and each guide frame is provided with an inclined guide groove. Each baffle is fixedly connected with a fixing strip, and one end of each fixing strip is fixedly connected with a round pin. The round pin is slidably limited inside the corresponding inclined guide groove.

[0013] Preferably, a guide frame is fixedly connected to the bottom of the rectangular dividing hopper, and the bottom end of the guide frame is inclined outward from the rectangular dividing hopper.

[0014] Preferably, the water inlet sealing assembly includes a lifting bracket, which is positioned above the intermediate tank. Multiple sealing rods are fixedly connected to the lifting bracket, and the multiple sealing rods are respectively located at the top of the corresponding immersion water pipe. The bottom end of the sealing rod contacts and seals the top opening of the immersion water pipe.

[0015] Preferably, the bottom end of the immersion water pipe is sealed, and two side openings are opened circumferentially on the surface of the immersion water pipe, both of which are located at the top of the sealed end.

[0016] Preferably, the material dispensing holes are all conical structures with a larger top and a smaller bottom, and the diameter of the sealing pin is the same as the inner diameter of the bottom of the material dispensing hole.

[0017] Preferably, the arc-shaped vibration trajectory of the continuous casting crystallizer is coaxial with the arc end of the straightening machine.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The slag dispersion component further disperses the slag into the heat-conducting frame. Since the diameter of the baffle ring is larger than the diagonal length of the inner wall of the heat-conducting frame, the surface of the molten steel can be effectively covered by the continuous casting protective slag. This improves the uniformity of the distribution of the protective slag above the molten steel surface, reduces the probability of air contact with the molten steel surface, and ensures the processing quality of the billet. Each time the continuous casting crystallizer performs an arc-like vibration in the up-down direction, the continuous casting protective slag completes one feeding cycle. This synchronizes the feeding frequency of the protective slag with the vibration frequency of the continuous casting crystallizer, allowing for precise matching between the billet casting speed and the replenishment of the protective slag, thereby improving the utilization rate of the protective slag.

[0020] 2. When the rotating ring drives multiple connecting shafts to revolve, the conical wheel drives the connecting shafts to rotate through meshing with the conical tooth ring, thereby driving the material distribution blades to rotate. This causes the multiple material distribution blades to continuously rotate while revolving, constantly adjusting their own position and deflection angle, further increasing the randomness of the protective slag's descent and improving the uniformity of the protective slag's dispersion.

[0021] 3. During the arc-simulation vibration process of the continuous casting crystallizer, the baffle bar moves back and forth continuously through the action of the movable components, thereby continuously opening the gap between the rectangular dividing hopper and the rectangular receiving section. This allows the externally collected protective slag to fall intermittently onto the side wall of the heat-conducting frame, providing targeted material replenishment at the contact point between the molten steel and the heat-conducting frame, improving the lubrication of the contact point, and reducing the resistance when the steel billet casting vibrates and slips. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A in the diagram;

[0024] Figure 3 This is a cross-sectional schematic diagram of the interlocking structure of the intermediate liner, immersion water pipe and sealing rod of the present invention.

[0025] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point B in the diagram;

[0026] Figure 5 This is a schematic diagram of the combined structure of the continuous casting crystallizer, the immersion water pipe, and the annular slag storage box of the present invention.

[0027] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point C;

[0028] Figure 7 For the present invention Figure 5 Enlarged schematic diagram of the structure at point D;

[0029] Figure 8 This is a schematic cross-sectional view of the combined structure of the continuous casting crystallizer, the immersion water pipe, and the annular slag storage box of the present invention.

[0030] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point E in the diagram;

[0031] Figure 10 For the present invention Figure 8 Enlarged schematic diagram of the structure at point F;

[0032] Figure 11 This is a schematic diagram of the combined structure of the collecting hopper and the rectangular dividing hopper of the present invention (the collecting hopper has been cut in half).

[0033] Figure 12 For the present invention Figure 11 A magnified schematic diagram of the structure at point G in the diagram.

[0034] In the diagram: 1. Tundish; 2. Continuous casting crystallizer; 3. Heat-conducting frame; 4. Straightening machine; 5. Immersion water pipe; 6. Annular slag storage box; 7. Material retaining ring; 8. Sprinkler hole; 9. Connecting frame; 10. Sealing pin; 11. Feeding pipe; 12. Connecting pipe; 13. Annular guide rail; 14. Rotating ring; 15. Connecting shaft; 16. Distributing blade; 17. External gear ring; 18. Motor; 19. Gear; 20. Relief groove; 21. Conical wheel; 22. Conical gear ring; 23. Collection hopper; 2301. Circular guide section; 2302. Rectangular receiving section; 24. Rectangular dividing hopper; 25. Material retaining strip; 26. Fixed bracket; 27. Guide frame; 28. Inclined guide groove; 29. ​​Fixing strip; 30. Circular pin; 31. Guide frame; 32. Lifting bracket; 33. Sealing rod; 34. Side opening; 35. Fixed frame. Detailed Implementation

[0035] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0036] like Figures 1 to 12 The billet continuous casting apparatus shown includes a tundish 1, with multiple continuous casting molds 2 arranged below the tundish 1. A heat-conducting frame 3 (such as...) is fixedly connected inside the continuous casting molds 2. Figure 5 As shown), a straightening machine 4 is installed below each of the continuous casting crystallizers 2. Multiple immersion water pipes 5 are fixedly connected to the bottom of the tundish 1, and the bottom ends of the multiple immersion water pipes 5 are respectively located inside the corresponding heat-conducting frames 3 (e.g., ...). Figure 8 As shown), annular slag storage boxes 6 are slidably inserted into the surface of the immersion water pipe 5. The annular slag storage boxes 6 are fixedly connected above the corresponding continuous casting crystallizer 2. A baffle ring 7 is fixedly connected to the bottom opening of the annular slag storage box 6 (as shown). Figure 9 As shown), the baffle ring 7 is slidably inserted into the surface of the immersion water pipe 5, and the baffle ring 7 has multiple sprinkling holes 8.

[0037] The annular slag storage box 6 is equipped with a connecting frame 9. Multiple sealing pins 10 are fixedly connected to the bottom of the connecting frame 9. The bottom ends of the multiple sealing pins 10 are located inside the corresponding material dispensing holes 8. The connecting frame 9 is fixedly connected to the corresponding immersion water pipe 5. A slag dispersion component is set below the baffle ring 7. The immersion water pipe 5 has an arc structure. The arc of the immersion water pipe 5 is coaxial with the arc swing trajectory of the continuous casting crystallizer 2. The diameter of the baffle ring 7 is greater than the diagonal length of the inner wall of the heat conduction frame 3.

[0038] A water inlet sealing component is provided on the intermediate ladle 1. A feeding pipe 11 is provided above the annular slag storage box 6. A connecting pipe 12 is fixedly connected to the top of the annular slag storage box 6. The bottom end of the feeding pipe 11 is slidably connected inside the connecting pipe 12. The curvature of the connecting pipe 12 and the immersion water pipe 5 are coaxial with the arc-shaped swing trajectory of the casting crystallizer 2.

[0039] Molten steel is poured into the tundish 1 by turning the ladle over. The molten steel enters the immersion water pipe 5 along the tundish 1 and continues to be transported into the heat-conducting frame 3. When the molten steel is inside the heat-conducting frame 3, the continuous casting crystallizer 2 continuously exchanges heat with the heat-conducting frame 3 through the contact of the circulating water channel, so that the contact position between the molten steel and the heat-conducting frame 3 solidifies and forms a shell. The arc-like vibration of the continuous casting crystallizer 2 promotes the downward movement of the casting after the shell forms and enters the straightening machine 4. The casting is straightened by the straightening machine 4 and then cooled twice to form a solidified billet.

[0040] When the molten steel is inside the heat-conducting frame 3, the continuous casting crystallizer 2 continuously undergoes arc-like vibration, which drives the annular slag storage box 6 and the baffle ring 7 to vibrate synchronously. Since the curvature of the submerged water pipe 5 is coaxial with the arc-like swing trajectory of the continuous casting crystallizer 2, it can ensure that the annular slag storage box 6 and the baffle ring 7 slide in an arc along the surface of the submerged water pipe 5. This allows the baffle ring 7 to repeatedly move away from and towards the connecting frame 9, so that the discharge holes 8 on the baffle ring 7 are intermittently sealed by the sealing pins 10 on the connecting frame 9. When the discharge holes 8 are no longer sealed by the sealing pins 10, the continuous casting protective slag inside the annular slag storage box 6 falls downwards along the multiple discharge holes 8 and passes through... The slag dispersion component further disperses the slag into the heat-conducting frame 3. Since the diameter of the baffle ring 7 is larger than the diagonal length of the inner wall of the heat-conducting frame 3, the surface of the molten steel can be effectively covered by the continuous casting protective slag, which improves the uniformity of the distribution of the continuous casting protective slag above the molten steel surface, reduces the probability of air contact with the molten steel surface, and ensures the processing quality of the steel billet. Each time the continuous casting crystallizer 2 performs an arc-like vibration in the up and down direction, the continuous casting protective slag completes one feeding, thereby synchronizing the feeding frequency of the protective slag with the vibration frequency of the continuous casting crystallizer 2, so that the billet drawing speed and the replenishment of protective slag are precisely matched, and the utilization rate of protective slag is improved.

[0041] The annular slag storage box 6 vibrates synchronously with the continuous casting crystallizer 2 in an arc-like manner. The protective slag inside the annular slag storage box 6 is dispersed and spread out through the vibration, so that when the material feeding hole 8 is far away from the sealing pin 10, material can fall into the multiple material feeding holes 8. When the protective slag inside the annular slag storage box 6 decreases, material is added to the annular slag storage box 6 through the material feeding pipe 11. The connecting pipe 12 and the immersion water pipe 5 are both non-vertical round pipes with curvature. The curvature of the connecting pipe 12 and the immersion water pipe 5 are coaxial with the swing axis of the continuous casting crystallizer 2. When the annular slag storage box 6 drives the connecting pipe 12 to vibrate in an arc-like manner, the connecting pipe 12 can slide along the sliding connection of the material feeding pipe 11.

[0042] As a further embodiment of the present invention, the slag dispersion assembly includes an annular guide rail 13, which is fixedly connected to the bottom of the annular slag storage box 6, and a rotating ring 14 is rotatably connected inside the annular guide rail 13 (e.g., Figure 9 As shown), multiple connecting shafts 15 are rotatably connected to the rotating ring 14 along the circumference. Each connecting shaft 15 has a material distribution blade 16 fixedly connected to its surface. An external gear ring 17 is fixedly connected to the rotating ring 14. A motor 18 is fixedly installed on the annular slag storage box 6. A gear 19 is fixedly connected to the output shaft of the motor 18. A relief groove 20 is provided on the annular guide rail 13. One side of the gear 19 extends along the relief groove 20 into the interior of the annular guide rail 13 and meshes with the external gear ring 17.

[0043] The output shaft of the motor 18 drives the gear 19 to rotate, and through the meshing of the gear 19 with the external gear ring 17, the rotating ring 14 rotates unidirectionally inside the annular guide rail 13. This causes multiple connecting shafts 15 to revolve synchronously with the rotating ring 14, and drives the distributing blades 16 to revolve as well. This allows the multiple distributing blades 16 to continuously adjust their positions and guide the falling protective slag, thereby improving the uniformity of the protective slag distribution.

[0044] As a further embodiment of the present invention, a conical wheel 21 is fixedly connected to one end of the connecting shaft 15 located inside the annular guide rail 13, and a beveled ring 22 is fixedly connected inside the annular guide rail 13, with multiple conical wheels 21 rotating and meshing on the beveled ring 22.

[0045] When the rotating ring 14 drives multiple connecting shafts 15 to revolve, the conical wheel 21 drives the connecting shafts 15 to rotate through meshing with the conical tooth ring 22, thereby driving the material distribution blades 16 to rotate. This causes the multiple material distribution blades 16 to continuously rotate while revolving, constantly adjusting their own position and deflection angle, further increasing the randomness of the protective slag's descent and improving the uniformity of the protective slag's dispersion.

[0046] As a further embodiment of the present invention, a collection hopper 23 is fixedly connected to the bottom of the annular guide rail 13. The collection hopper 23 includes a circular guide section 2301 and a rectangular receiving section 2302. The circular guide section 2301 is located at the top of the rectangular receiving section 2302, and the rectangular receiving section 2302 slides against the inner wall of the heat-conducting frame 3 (in conjunction with...). Figure 9 and Figure 10 The inside of the collecting hopper 23 is fixedly connected to a rectangular dividing hopper 24 by a fixing frame 35. There is a gap between the rectangular dividing hopper 24 and the rectangular storage section 2302. All four sides of the rectangular storage section 2302 are slidably connected to baffle strips 25. One side of each baffle strip 25 passes through the rectangular storage section 2302 and contacts and fits against one side of the rectangular dividing hopper 24. Movable components are provided on the baffle strip 25.

[0047] Because the diameter of the baffle ring 7 is larger than the diagonal length of the inner wall of the heat-conducting frame 3, the falling area of ​​the protective slag is larger than the surface area of ​​the molten steel. This easily leads to the protective slag falling to the top of the continuous casting crystallizer 2 from all sides, causing waste. Through the setting of the collecting hopper 23 and the rectangular dividing hopper 24, the protective slag is dispersed by the slag dispersion component and divided into inner and outer parts. The inner protective slag falls directly onto the surface of the molten steel along the inside of the rectangular dividing hopper 24 and covers the surface. The outer protective slag falls between the collecting hopper 23 and the rectangular dividing hopper 24, thereby collecting and storing the protective slag falling outside the surface area. During the arc-like vibration of the continuous casting crystallizer 2, the baffle bar 25 moves back and forth continuously through the action of the movable component, thereby continuously opening the gap between the rectangular dividing hopper 24 and the rectangular receiving section 2302. This allows the externally collected protective slag to fall intermittently onto the side wall of the heat-conducting frame 3, providing targeted material replenishment at the contact point between the molten steel and the heat-conducting frame 3, improving the lubrication of the contact point, and reducing the resistance when the steel billet casting vibrates and slips.

[0048] As a further embodiment of the present invention, the movable component includes a plurality of fixed supports 26, which are respectively fixedly connected to corresponding immersion water pipes 5 (e.g., Figure 6 As shown), four guide frames 27 are fixedly connected to the fixed bracket 26. Each guide frame 27 is provided with an inclined guide groove 28. Each baffle 25 is fixedly connected with a fixing strip 29. One end of each fixing strip 29 is fixedly connected with a round pin 30. The round pin 30 is slidably limited inside the corresponding inclined guide groove 28.

[0049] During the arc-simulation vibration of the continuous casting crystallizer 2, the corresponding collection hopper 23 and the baffle bar 25 move synchronously. During the movement of the baffle bar 25, the circular pin 30 at one end of the fixing bar 29 moves along the interior of the corresponding inclined guide groove 28. Through the guiding action of the inclined guide groove 28, the baffle bar 25 moves along the sliding connection, thereby opening the gap between the rectangular receiving section 2302 and one side of the rectangular dividing hopper 24. This allows the protective slag to move downward along the gap between the rectangular receiving section 2302 and the rectangular dividing hopper 24 and fall into the side wall of the heat-conducting frame 3. The baffle bar 25 will never detach from the rectangular receiving section 2302 during the movement, preventing the protective slag from falling from the sliding connection between the rectangular receiving section 2302 and the baffle bar 25. In each arc-simulation vibration cycle of the continuous casting crystallizer 2, the side wall of the heat-conducting frame 3 can be replenished with protective slag once, improving the lubrication effect of the billet casting sliding downward.

[0050] As a further embodiment of the present invention, a guide frame 31 is fixedly connected to the bottom of the rectangular dividing hopper 24, and the bottom end of the guide frame 31 is inclined to the outside of the rectangular dividing hopper 24.

[0051] As the protective slag moves downward along the gap between the rectangular receiving section 2302 and the rectangular dividing hopper 24, it is guided by the inclined surface of the guide frame 31, which improves the degree of contact and fit between the protective slag and the side wall of the heat-conducting frame 3 and increases the contact lubrication effect at the side wall.

[0052] As a further embodiment of the present invention, the water inlet sealing assembly includes a lifting bracket 32, which is disposed above the intermediate tundish 1. A plurality of sealing rods 33 are fixedly connected to the lifting bracket 32. The plurality of sealing rods 33 are respectively located at the top of the corresponding immersion water pipe 5, and the bottom end of the sealing rod 33 contacts and seals the top opening of the immersion water pipe 5.

[0053] When molten steel is injected into the tundish 1 through the ladle, multiple sealing rods 33 seal the top opening of the submerged water pipe 5. The lifting support 32 is driven to rise by the hydraulic cylinder, which in turn drives the multiple sealing rods 33 to rise synchronously, thereby releasing the seal on the top opening of the submerged water pipe 5 and allowing the molten steel inside the tundish 1 to flow downward along the top opening of the submerged water pipe 5.

[0054] As a further embodiment of the present invention, the bottom end of the immersion water pipe 5 is sealed, and two side openings 34 are opened circumferentially on the surface of the immersion water pipe 5, both side openings 34 being located at the top of the sealed end.

[0055] By sealing the bottom of the immersion water pipe 5, the molten steel cannot be discharged directly through the bottom opening when it flows downward along the immersion water pipe 5. Instead, it can only be discharged from the drain outlets on both sides. This causes the molten steel to impact the side wall of the heat-conducting frame 3 at a certain angle, increasing the residence time of the molten steel inside the heat-conducting frame 3. It also cools rapidly through contact with the heat-conducting frame 3, ensuring the formation of the billet shell.

[0056] As a further embodiment of the present invention, the sprinkling holes 8 are all conical structures with a larger top and a smaller bottom, and the diameter of the sealing pin 10 is the same as the bottom inner diameter of the sprinkling hole 8;

[0057] The conical structure of the feeding hole 8 allows the protective slag to converge and fall into the feeding hole 8 after the sealing pin 10 is dislodged. Furthermore, the clearance effect of the conical wheel 21 ensures that there is no movement interference between the sealing pin 10 and the feeding hole 8 when the baffle ring 7 moves in an arc.

[0058] As a further embodiment of the present invention, the arc-shaped vibration trajectory of the continuous casting crystallizer 2 is coaxial with the arc end of the straightening machine 4;

[0059] The arc-shaped vibration trajectory of the continuous casting crystallizer 2 is coaxial with the arc end of the straightening machine 4. Throughout the entire process from the beginning of solidification to complete straightening of the molten steel, the arc-shaped center line of the billet always coincides with the guide center line of the equipment, eliminating relative motion and additional stress, and improving the casting effect of the billet.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A continuous billet casting apparatus, comprising an tundish, characterized in that, Multiple continuous casting crystallizers are installed below the tundish. A heat-conducting frame is fixedly connected inside the continuous casting crystallizer. A straightening machine is installed below each continuous casting crystallizer. Multiple immersion water pipes are fixedly connected to the bottom of the tundish. The bottom ends of the multiple immersion water pipes are located inside the corresponding heat-conducting frames. A ring-shaped slag storage box is slidably inserted into the surface of each immersion water pipe. The ring-shaped slag storage box is fixedly connected above the corresponding continuous casting crystallizer. A baffle ring is fixedly connected to the bottom opening of the ring-shaped slag storage box. The baffle ring is slidably inserted into the surface of the immersion water pipe. Multiple material dispensing holes are opened on the baffle ring. The annular slag storage box is equipped with a connecting frame inside. Multiple sealing pins are fixedly connected to the bottom of the connecting frame. The bottom ends of the multiple sealing pins are located inside the corresponding material dispensing holes. The connecting frame is fixedly connected to the corresponding immersion water pipe. A slag dispersion component is set below the baffle ring. The immersion water pipe has an arc structure. The arc of the immersion water pipe is coaxial with the arc swing trajectory of the continuous casting crystallizer. The diameter of the baffle ring is larger than the diagonal length of the inner wall of the heat conduction frame. The intermediate tundish is equipped with a water inlet sealing component, and a feeding pipe is installed above the annular slag storage box. A connecting pipe is fixedly connected to the top of the annular slag storage box, and the bottom end of the feeding pipe is slidably connected inside the connecting pipe. The curvature of the connecting pipe and the immersion water pipe is coaxial with the arc-shaped swing trajectory of the casting crystallizer.

2. The continuous casting apparatus for steel billets according to claim 1, characterized in that, The slag dispersion assembly includes an annular guide rail, which is fixedly connected to the bottom of an annular slag storage box. A rotating ring is rotatably connected inside the annular guide rail. Multiple connecting shafts are rotatably connected to the rotating ring in the circumferential direction. Distributing blades are fixedly connected to the surface of each connecting shaft. An external gear ring is fixedly connected to the rotating ring. A motor is fixedly installed on the annular slag storage box. A gear is fixedly connected to the output shaft of the motor. A clearance groove is opened on the annular guide rail. One side of the gear extends along the clearance groove into the interior of the annular guide rail and meshes with the external gear ring.

3. The continuous casting apparatus for steel billets according to claim 2, characterized in that, The connecting shaft is fixedly connected to a conical wheel at one end inside the annular guide rail. A bevel gear ring is fixedly connected inside the annular guide rail, and multiple conical wheels rotate and mesh on the bevel gear ring.

4. The continuous casting apparatus for steel billets according to claim 2, characterized in that, A collection hopper is fixedly connected to the bottom of the annular guide rail. The collection hopper includes a circular guide section and a rectangular receiving section. The circular guide section is located at the top of the rectangular receiving section. The rectangular receiving section slides against the inner wall of the heat-conducting frame. A rectangular dividing hopper is fixedly connected to the inside of the collection hopper through a fixing frame. There is a gap between the rectangular dividing hopper and the rectangular receiving section. A baffle strip is slidably connected to each of the four sides of the rectangular receiving section. One side of the baffle strip passes through the rectangular receiving section and contacts and fits against one side of the rectangular dividing hopper. Movable components are provided on the baffle strip.

5. A continuous billet casting apparatus according to claim 4, characterized in that, The active component includes multiple fixed brackets, which are fixedly connected to the corresponding immersion water pipes. Four guide frames are fixedly connected to the fixed brackets, and each guide frame has an inclined guide groove. Each baffle is fixedly connected to a fixing strip, and one end of each fixing strip is fixedly connected to a round pin. The round pin slides and is limited inside the corresponding inclined guide groove.

6. The continuous casting apparatus for steel billets according to claim 5, characterized in that, The bottom of the rectangular dividing hopper is fixedly connected to a guide frame, and the bottom of the guide frame is inclined outward from the rectangular dividing hopper.

7. The continuous casting apparatus for steel billets according to claim 1, characterized in that, The water inlet sealing assembly includes a lifting bracket, which is positioned above the intermediate tank. Multiple sealing rods are fixedly connected to the lifting bracket, and each sealing rod is located at the top of a corresponding immersion water pipe. The bottom end of the sealing rod contacts and seals the top opening of the immersion water pipe.

8. A continuous billet casting apparatus according to claim 7, characterized in that, The bottom of the immersion water pipe is sealed, and there are two side openings on the surface of the immersion water pipe along the circumference. Both side openings are located on top of the sealed end.

9. A continuous billet casting apparatus according to claim 1, characterized in that, All the material dispensing holes are conical structures with a larger top and a smaller bottom, and the diameter of the sealing pin is the same as the inner diameter of the bottom of the material dispensing hole.

10. A continuous billet casting apparatus according to claim 1, characterized in that, The arc-shaped vibration trajectory of the continuous casting crystallizer is coaxial with the arc end of the straightening machine.

Images