A crystallizer for stainless steel large square bloom continuous casting

Abstract

This invention proposes a crystallizer for continuous casting of large square and round stainless steel billets, comprising a mounting platform, hydraulic rods, a crystallization component, and a protective slag adding component. The crystallization component is movably mounted on the mounting platform, and the protective slag adding component is fixedly mounted on the top of the mounting platform. The protective slag adding component and the crystallization component are interconnected. At least one set of hydraulic rods is located at the bottom of the mounting platform, and the telescopic ends of the hydraulic rods are connected to the crystallization component. This invention not only completely eliminates the randomness and risks associated with manual slag addition, but also avoids the breakage of protective slag particles caused by high-speed airflow impact during pneumatic conveying. At the same time, it eliminates the need for additional motors and complex electrical control units, significantly reducing equipment manufacturing costs while making the overall structure more compact and easier to install and maintain in the confined space of a multi-strand continuous casting machine.

Description

Technical Field

[0001] This invention relates to the field of stainless steel continuous casting, and more particularly to a crystallizer for continuous casting of large square and round stainless steel billets. Background Technology

[0002] Large stainless steel billets are an important basic material used in the production of high-end seamless steel pipes, shaft forgings, and other products. In the continuous casting process of large stainless steel billets, the molten steel needs to be rapidly cooled and solidified in a crystallizer to initially form a billet shell with sufficient thickness and strength, laying the foundation for subsequent straightening and cutting processes.

[0003] In continuous casting, mold flux plays a crucial role in heat insulation, preventing secondary oxidation of molten steel, absorbing inclusions, lubricating the billet shell, and improving heat transfer. Currently, the methods for adding mold flux are mainly divided into two categories: manual operation and automatic robotic addition, but both have certain drawbacks.

[0004] The manual slag addition method is significantly random due to the reaction rate, making it difficult to respond promptly to changes in casting speed and liquid level fluctuations, which can easily lead to waste or insufficient supply of protective slag. At the same time, the long-term exposure of staff to the high temperature, high humidity, and high dust environment near the crystallizer can cause discomfort to the operators and, in severe cases, may even affect their health.

[0005] Existing slag-feeding robots mainly employ pneumatic conveying or mechanical feeding structures. Pneumatic conveying relies on high-speed compressed air as power, accelerating the movement of slag particles within the airflow. When these particles pass through bends, valves, or collide with pipe walls, they generate intense impacts and friction. Since slag is typically processed from various mineral raw materials, it is a porous and brittle material with low particle strength, making it highly susceptible to breakage under high-speed collisions, leading to slag particle breakage and pipe blockage. Mechanical feeding systems, on the other hand, require independent power sources such as motors and cylinders, as well as complex transmission and control units, resulting in bulky and expensive equipment that is difficult to install and maintain within the confined operating space of multi-strand continuous casting machines. Summary of the Invention

[0006] The present invention aims to at least partially solve one of the technical problems in the above-mentioned technologies.

[0007] Therefore, one objective of this invention is to provide a crystallizer for continuous casting of large square and round stainless steel billets. This crystallizer uses the up-and-down movement of the crystallization component to synchronously drive the protective slag adding component, achieving automatic addition of protective slag into the crystallization component through mechanical linkage. This structure not only completely eliminates the randomness and risks associated with manual slag addition but also avoids the breakage of protective slag particles caused by high-speed airflow impact during pneumatic conveying. Furthermore, it eliminates the need for additional motors and complex electrical control units, significantly reducing equipment manufacturing costs while making the overall structure more compact and easier to install and maintain within the confined space of a multi-strand continuous casting machine.

[0008] To achieve the above objectives, the first aspect of the present invention provides a crystallizer for continuous casting of large square and round stainless steel billets, comprising a mounting platform, hydraulic rods, a crystallization component, and a protective slag adding component. The crystallization component is movably mounted on the mounting platform, and a protective slag adding component is fixedly mounted on the top of the mounting platform. The protective slag adding component communicates with the crystallization component. At least one set of hydraulic rods is disposed at the bottom of the mounting platform, and the telescopic ends of the hydraulic rods are connected to the crystallization component. The crystallization component includes a cooling jacket, a crystallization sleeve, two support seats, four sealing pillars, and four strip teeth. The cooling jacket is movably mounted on the mounting platform, and the crystallization sleeve is located inside the cooling jacket. Two support seats are respectively fixedly mounted on the top and bottom of the crystallization sleeve, and the two support seats abut against both ends of the cooling jacket. Four sealing pillars are respectively vertically mounted on the support seats at the top of the crystallization sleeve. Four strip teeth are respectively vertically mounted on the tops of the corresponding sealing pillars. The protective slag adding component includes a mounting frame, four sealing sleeves, a cooling layer, a lubrication layer, a storage bin, four one-way ratchet assemblies, two crank-connecting rod assemblies, and two tee pipes. The mounting bracket is fixedly mounted on the top of the mounting platform, and the inner wall of the mounting bracket abuts against the outer wall of the support base at the top of the crystallizing sleeve; four sealing sleeves are respectively fixedly mounted at the four corners of the mounting bracket, and four sealing posts are respectively located inside the corresponding sealing sleeves; the cooling layer is fixedly mounted on the inner wall of the mounting bracket above the crystallizing component, and the outer walls of the four sealing sleeves are respectively located within the cooling layer; the lubrication layer is fixedly mounted on the top of the cooling layer, and the lubrication layer is connected to the internal space of the four sealing sleeves; the two storage bins are respectively mirror-image arranged on the platform. The lubrication layer is located on both sides of the top, and the two storage bins are respectively connected to the corresponding three-way pipes; the four one-way ratchet assemblies are respectively disposed on both ends of the two crank connecting rod assemblies, and the four one-way ratchet assemblies are respectively engaged with the corresponding strip teeth; the two crank connecting rod assemblies are respectively axially connected inside the lubrication layer, and the working ends of the two crank connecting rod assemblies are respectively located in the corresponding three-way pipes; the two three-way pipes are respectively fixedly disposed on the inner wall of the lubrication layer on the side away from the mounting bracket, and one end of the two three-way pipes is respectively located in the two storage bins.

[0009] Furthermore, the crystallizer for continuous casting of large square and round stainless steel billets proposed according to the present invention may also have the following additional technical features: Specifically, the mounting platform is U-shaped and has a support sleeve on top; the support sleeve is T-shaped and has multiple sliding grooves on its inner wall; the cooling sleeve is movably disposed inside the support sleeve.

[0010] Specifically, the cooling jacket and the mounting bracket are respectively provided with connecting pipes, and the connecting pipe on the mounting bracket is in communication with the cooling layer; the outer wall of the cooling jacket is also provided with a plurality of sliders; the plurality of sliders are respectively matched with the plurality of sliding grooves, and the plurality of sliders are respectively located in the corresponding sliding grooves.

[0011] Specifically, a support lug is provided on the side wall of the support base at the bottom of the crystallization sleeve; the telescopic end of the hydraulic rod is connected to the support lug; and multiple heat dissipation fins are fixedly provided on the outer wall of the crystallization sleeve.

[0012] Specifically, two sets of support plates are respectively provided inside the lubrication layer; the two sets of crank connecting rod assemblies are respectively provided on the two sets of support plates.

[0013] Specifically, each of the one-way ratchet assemblies includes a drive tooth, a pawl, and an elastic element. The drive tooth is sleeved on one end of the crank-connecting rod assembly, and the drive tooth is provided with external teeth and internal teeth respectively. The pawl is rotatably disposed on one end of the crank-connecting rod assembly, and the pawl and the internal teeth engage with each other. The elastic element is fixedly disposed on one end of the crank-connecting rod assembly, and one end of the elastic element is connected to the pawl. The external teeth mesh with the corresponding strip teeth.

[0014] Specifically, each crank-connecting rod assembly includes two drive rods, two limiting sleeves, two cams, a connecting rod, and a piston. The two drive rods are respectively mirror-axis connected to a set of support plates, and each drive rod has a baffle at one end. Two one-way ratchet assemblies are respectively mounted on one end of the two drive rods, and are located on one side of each baffle. Two limiting sleeves are respectively fitted onto the outer walls of the two drive rods, and each limiting sleeve abuts against the support plate and the one-way ratchet assembly at both ends. Two cams are respectively fixedly mounted on the ends of the two drive rods away from the one-way ratchet assemblies. One end of the connecting rod is pivotally connected to the opposite surfaces of the two cams, and the other end of the connecting rod is pivotally connected to one end of the piston. The piston is movable inside the three-way tube.

[0015] Specifically, the three-way pipe includes a piston pipe and a feed pipe, wherein the piston pipe is fixedly disposed on the inner wall of the lubricating layer on the side away from the mounting bracket; one end of the feed pipe is fixedly disposed on the top of the piston pipe, and the other end extends through the lubricating layer to the corresponding storage bin, and the feed pipe and the piston pipe are interconnected; the piston is movably disposed inside the piston pipe, and the outer wall of the piston abuts against the inner wall of the piston pipe.

[0016] Specifically, the mounting platform, the support sleeve, and the mounting bracket are each provided with corresponding mounting holes, and the support sleeve and the mounting bracket are respectively fixedly mounted on the top of the mounting platform through the mounting holes.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The crystallizer of the present invention for continuous casting of large square and round stainless steel billets can drive the rotation of the one-way ratchet assembly through the up and down movement of the crystallizing component. The one-way ratchet assembly continuously drives the transmission rod to rotate, thereby realizing the addition of protective slag to the inside of the crystallizing sleeve by the piston that continuously makes linear reciprocating motion inside the piston tube. This device can not only completely eliminate the randomness and risks of manual slag addition, but also avoid the breakage of protective slag particles caused by high-speed airflow impact during pneumatic conveying. At the same time, it does not require additional motors and complex electrical control units, which significantly reduces the equipment manufacturing cost while making the overall structure more compact and easier to install and maintain in the narrow space of a multi-strand continuous casting machine.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of a crystallizer structure for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the main cross-sectional structure of a crystallizer for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention. Figure 3 This is a schematic side sectional view of a crystallizer for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention. Figure 4 This is an exploded structural diagram of a crystallizer mounting platform for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention. Figure 5 This is an exploded structural diagram of a crystallizer component for continuous casting of large round and square stainless steel billets according to an embodiment of the present invention. Figure 6 This is an enlarged structural schematic diagram of a crystallizer A for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention. Figure 7 This is a schematic diagram of a mold flux addition component for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention. Figure 8This is a schematic diagram of the internal structure of a mold flux addition component for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention. Figure 9 This is a schematic diagram of a crystallizer crank connecting rod assembly for continuous casting of large stainless steel billets according to an embodiment of the present invention, with the assembly located within the lubrication layer. Figure 10 This is a schematic diagram of a crystallizer cooling layer structure for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention. Figure 11 This is a schematic diagram of a crystallizer crank-connecting rod assembly for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention. Figure 12 This is a schematic diagram of a unidirectional ratchet assembly for continuous casting of large round and square stainless steel billets according to an embodiment of the present invention.

[0020] Figure label: Mounting platform; 11. Support sleeve; 111. Slide groove; 2. Hydraulic rod; 3. Crystallization component; 31. Cooling sleeve; 311. Slider; 32. Crystallization sleeve; 321. Heat dissipation fins; 33. Support base; 331. Support ear; 34. Sealing column; 35. Strip tooth; 4. Protective slag addition component; 41. Mounting frame; 42. Sealing sleeve; 43. Cooling layer; 44. Lubricating layer; 441. Support plate; 45. Material storage. 46. ​​One-way ratchet assembly; 461. Drive gear; 4611. External gear; 4612. Internal gear; 462. Pawl; 463. Elastic element; 47. Crank and connecting rod assembly; 471. Drive rod; 4711. Baffle; 472. Limit sleeve; 473. Cam; 474. Connecting rod; 475. Piston; 48. T-connector; 481. Piston tube; 482. Feed tube; 5. Connecting tube; 6. Mounting hole. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] A crystallizer for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0023] like Figures 1-12 As shown, a crystallizer for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention may include: a mounting platform 1, a hydraulic rod 2, a crystallization component 3, and a protective slag addition component 4.

[0024] The crystallization component 3 is movably mounted on the mounting platform 1, and a protective slag adding component 4 is fixedly mounted on the top of the mounting platform 1. The protective slag adding component 4 and the crystallization component 3 are interconnected. At least one set of hydraulic rods 2 is mounted at the bottom of the mounting platform 1, and the telescopic end of the hydraulic rods 2 is connected to the crystallization component 3.

[0025] It is understandable that the operation of the hydraulic rod 2 will cause the crystallizing component 3 to make vertical reciprocating motion inside the mounting platform 1, thereby causing the moving crystallizing component 3 to drive the protective slag adding component 4 to add protective slag inside the crystallizing component 3.

[0026] like Figures 1-4 As shown in the figure, a crystallizer for continuous casting of stainless steel large square and round billets according to an embodiment of the present invention has a mounting platform 1 in the shape of a square and a support sleeve 11 on the top. The support sleeve 11 is T-shaped and has multiple sliding grooves 111 on its inner wall. The cooling sleeve 31 is movably disposed inside the support sleeve 11.

[0027] It should be noted that multiple sliders 311 are also provided on the outer wall of the cooling jacket 31. The multiple sliders 311 are matched with multiple slide grooves 111 respectively, and the multiple sliders 311 are respectively located in the corresponding slide grooves 111.

[0028] It is understandable that when the hydraulic rod 2 drives the crystallizing component 3 to move vertically back and forth inside the support sleeve 11, multiple sliders 311 will move inside the corresponding grooves 111, thereby making the crystallizing component 3 more stable when moving and preventing damage to the cooling sleeve 31 during the movement of the crystallizing component 3, thus affecting the cooling effect of the crystallizing component 3.

[0029] It should be noted that the mounting platform 1 is fixedly installed directly below the tundish, so that during the continuous casting process, molten steel can enter the crystallization unit 3 located below it through the tundish.

[0030] like Figure 2 and Figure 5 As shown in the figure, a crystallizer for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention includes a crystallization component 3 comprising a cooling jacket 31, a crystallization jacket 32, two support seats 33, four sealing pillars 34 and four strip teeth 35.

[0031] The cooling jacket 31 is movably mounted on the mounting platform 1, and the crystallizing jacket 32 ​​is located inside the cooling jacket 31. Two support seats 33 are fixedly mounted on the top and bottom of the crystallizing jacket 32, and the two support seats 33 abut against the two ends of the cooling jacket 31. Four sealing pillars 34 are vertically mounted on the support seats 33 at the top of the crystallizing jacket 32, and four strip teeth 35 are vertically mounted on the top of the corresponding sealing pillars 34.

[0032] It should be noted that a connecting pipe 5 is provided on the cooling jacket 31, and a support ear 331 is provided on the side wall of the support seat 33 at the bottom of the crystallizing jacket 32. The telescopic end of the hydraulic rod 2 is connected to the support ear 331, and multiple heat dissipation fins 321 are fixedly provided on the outer wall of the crystallizing jacket 32.

[0033] It is understandable that the external circulating cooling device can be connected through the connecting pipe 5, so that the external water source will pass between the cooling jacket 31 and the crystallizing jacket 32, thereby carrying away the heat generated by the crystallizing jacket 32 ​​through the water flow, thus cooling the crystallizing jacket 32 ​​and cooling and shaping the stainless steel solution flowing inside it. The heat dissipation fins 321 increase the contact area between the crystallizing jacket 32 ​​and the water flow, thereby improving the cooling efficiency of the crystallizing jacket 32.

[0034] It should be noted that the crystallizer 32 is a copper metal plate, which gives it excellent thermal conductivity.

[0035] like Figure 6 and Figure 10 As shown in the figure, a crystallizer for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention includes a protective slag adding component 4 comprising a mounting frame 41, four sealing sleeves 42, a cooling layer 43, a lubrication layer 44, a storage bin 45, four one-way ratchet assemblies 46, two crank connecting rod assemblies 47, and two tee pipes 48.

[0036] The mounting bracket 41 is fixedly mounted on the top of the mounting platform 1, and the inner wall of the mounting bracket 41 abuts against the outer wall of the support seat 33 on the top of the crystallizing sleeve 32. Four sealing sleeves 42 are fixedly mounted at the four corners of the mounting bracket 41, and four sealing posts 34 are respectively located inside the corresponding sealing sleeves 42. The cooling layer 43 is fixedly mounted on the inner wall of the mounting bracket 41 above the crystallizing component 3, and the outer walls of the four sealing sleeves 42 are respectively located inside the cooling layer 43. The lubrication layer 44 is fixedly mounted on the top of the cooling layer 43, and the lubrication layer 44 is connected to the internal space of the four sealing sleeves 42. Two storage bins 45 are respectively mirror-mounted in the lubrication layer 43. The top two sides of the layer 44 and the two storage bins 45 are respectively connected to the corresponding three-way pipes 48. The four one-way ratchet assemblies 46 are respectively set on both ends of the two crank connecting rod assemblies 47, and the four one-way ratchet assemblies 46 are respectively engaged with the corresponding strip teeth 35. The two crank connecting rod assemblies 47 are respectively axially connected and set inside the lubrication layer 44, and the working ends of the two crank connecting rod assemblies 47 are respectively located in the corresponding three-way pipes 48. The two three-way pipes 48 are respectively fixed on the inner wall of the lubrication layer 44 away from the mounting bracket 41, and one end of the two three-way pipes 48 is respectively located in the two storage bins 45.

[0037] It should be noted that each mounting bracket 41 is provided with a connecting pipe 5, and the connecting pipe 5 on the mounting bracket 41 is in communication with the cooling layer 43. Two sets of support plates 441 are respectively provided inside the lubrication layer 44, and two sets of crank connecting rod assemblies 47 are respectively provided on the two sets of support plates 441.

[0038] Understandably, lubricating fluid can be added inside the lubrication layer 44. When the mounting bracket 41 is connected to the external circulating cooling device through the connecting pipe 5, the water flowing continuously inside the cooling layer 43 through the circulating cooling device will continuously carry away the heat generated by the lubricating fluid inside the lubrication layer 44, preventing the lubricating fluid inside the lubrication layer 44 from becoming too hot. This achieves the purpose of cooling the one-way ratchet assembly 46 and the crank connecting rod assembly 47 inside the lubrication layer 44. Furthermore, the lubricating fluid inside the lubrication layer 44 also lubricates the parts inside the lubrication layer 44, reducing the friction between the strip tooth 35, the one-way ratchet assembly 46, and the crank connecting rod assembly 47, and also cooling the parts.

[0039] like Figure 6 and Figure 12 As shown, in an embodiment of the present invention, a crystallizer for continuous casting of large square and round stainless steel billets is provided, each unidirectional ratchet assembly 46 includes a drive tooth 461, a pawl 462 and an elastic element 463.

[0040] The transmission gear 461 is sleeved on one end of the crank-connecting rod assembly 47, and the transmission gear 461 is provided with external teeth 4611 and internal teeth 4612 respectively. The pawl 462 is rotatably mounted on one end of the crank-connecting rod assembly 47, and the pawl 462 and the internal teeth 4612 are engaged with each other. One end of the elastic element 463 is fixedly mounted on one end of the crank-connecting rod assembly 47, and the other end of the elastic element 463 is connected to the pawl 462. The external teeth 4611 mesh with the corresponding strip teeth 35.

[0041] It is understandable that when the bar tooth 35 makes linear reciprocating motion, it will drive the transmission tooth 461 to rotate through the external tooth 4611. When the bar tooth 35 rises, the transmission tooth 461 drives the crank connecting rod assembly 47 to rotate through the internal tooth 4612 and the pawl 462. When the bar tooth 35 descends, the transmission tooth 461 continuously presses the pawl 462 through the internal tooth 4612 to deform the elastic element 463. At this time, the transmission tooth 461 idles, and the crank connecting rod assembly 47 does not rotate.

[0042] It should be noted that the elastic element 463 is a metal element with elastic potential energy, such as a reed or spring.

[0043] like Figure 9 and Figure 11As shown in the figure, a crystallizer for continuous casting of large square and round stainless steel billets according to an embodiment of the present invention includes each crank-connecting rod assembly 47 comprising two transmission rods 471, two limiting sleeves 472, two cams 473, a connecting rod 474, and a piston 475.

[0044] Two transmission rods 471 are mirror-axis connected to a set of support plates 441, and each of the two transmission rods 471 has a baffle 4711 at one end. Two one-way ratchet assemblies 46 are respectively mounted on one end of the two transmission rods 471, and the two one-way ratchet assemblies 46 are respectively located on one side of the two baffles 4711. Two limiting sleeves 472 are respectively fitted on the outer wall of the two transmission rods 471, and the two ends of each limiting sleeve 472 abut against the support plate 441 and the one-way ratchet assembly 46, respectively. Two cams 473 are respectively fixedly mounted on the ends of the two transmission rods 471 away from the one-way ratchet assembly 46. One end of the connecting rod 474 is pivotally connected to the opposite surface of the two cams 473, and the other end of the connecting rod 474 is pivotally connected to one end of the piston 475. The piston 475 is movable inside the three-way pipe 48.

[0045] The three-way pipe 48 includes a piston pipe 481 and a feed pipe 482.

[0046] The piston tube 481 is fixedly installed on the inner wall of the lubrication layer 44 on the side away from the mounting bracket 41. One end of the feed tube 482 is fixedly installed on the top of the piston tube 481, and the other end extends through the lubrication layer 44 to the corresponding storage bin 45. The feed tube 482 and the piston tube 481 are interconnected. The piston 475 is movably installed inside the piston tube 481, and the outer wall of the piston 475 abuts against the inner wall of the piston tube 481.

[0047] Understandably, when the transmission rod 471 rotates, it drives the connecting rod 474 to move through the cam 473. This causes the connecting rod 474 to drive the piston 475 to continuously reciprocate in a straight line within the piston tube 481. When the piston 475 moves toward the transmission rod 471, the protective slag inside the storage bin 45 will be affected by gravity and fall through the feed pipe 482 into the piston tube 481. When the piston 475 moves away from the transmission rod 471, it will push the protective slag inside the piston tube 481 out of the piston tube 481, causing it to fall into the crystallization component 3.

[0048] It should be noted that the mounting platform 1, the support sleeve 11 and the mounting bracket 41 are respectively provided with corresponding mounting holes 6, and the support sleeve 11 and the mounting bracket 41 are respectively fixedly installed on the top of the mounting platform 1 through the mounting holes 6.

[0049] The following is the usage process of a crystallizer for continuous casting of large square and round stainless steel billets provided by this invention: When in use, first connect the connecting pipe 5 on the cooling jacket 31 and the mounting bracket 41 to the external circulation device, and add appropriate protective slag to the inside of the storage bin 45.

[0050] At this time, the hydraulic rod 2 is activated, and the stainless steel liquid that has been melted and cast into a solution is transported through the intermediate ladle to the inside of the crystallizing sleeve 32. At this time, the water flow between the crystallizing sleeve 32 and the cooling sleeve 31 will carry away the heat generated by the crystallizing sleeve 32, thereby solidifying the surface of the molten steel inside the crystallizing sleeve 32.

[0051] The hydraulic rod 2 will continuously drive the crystallizing component 3 to perform linear reciprocating motion, so that the solidified billet on the surface will be affected by the movement of the crystallizing component 3 and gradually move downward, thus avoiding the adhesion between the molten steel and the crystallizing sleeve 32.

[0052] Furthermore, during the movement of the crystallizing component 3, the strip tooth 35 continuously drives the transmission rod 471 to rotate through the transmission tooth 461 and the pawl 462, thereby causing the transmission rod 471 to drive the piston 475 to make linear reciprocating motion inside the piston tube 481 through the connecting rod 474, thereby continuously adding the protective slag inside the storage bin 45 into the molten steel inside the crystallizing sleeve 32 through the piston tube 481.

[0053] In summary, the crystallizer for continuous casting of large square and round stainless steel billets of the present invention can drive the rotation of a one-way ratchet assembly through the up and down movement of the crystallizing component. The one-way ratchet assembly continuously drives the transmission rod to rotate, thereby realizing the addition of protective slag to the inside of the crystallizing sleeve by the piston that continuously makes linear reciprocating motion inside the piston tube. This device can not only completely eliminate the randomness and risks of manual slag addition, but also avoid the breakage of protective slag particles caused by high-speed airflow impact during pneumatic conveying. At the same time, it does not require additional motors and complex electrical control units, which significantly reduces the equipment manufacturing cost while making the overall structure more compact and easy to install and maintain in the confined space of a multi-strand continuous casting machine.

[0054] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A crystallizer for continuous casting of large square and round stainless steel billets, characterized in that, It includes an installation platform (1), a hydraulic rod (2), a crystallization component (3), and a protective slag addition component (4), among which, The crystallization component (3) is movably mounted on the mounting platform (1), and a protective slag addition component (4) is fixedly mounted on the top of the mounting platform (1). The protective slag addition component (4) is interconnected with the crystallization component (3). At least one set of hydraulic rods (2) is mounted at the bottom of the mounting platform (1), and the telescopic end of the hydraulic rods (2) is connected to the crystallization component (3). The crystallization component (3) includes a cooling jacket (31), a crystallization jacket (32), two support seats (33), four sealing pillars (34), and four strip teeth (35), wherein, The cooling sleeve (31) is movably mounted on the mounting platform (1), and the crystallizing sleeve (32) is located inside the cooling sleeve (31); The two support bases (33) are respectively fixedly disposed at the top and bottom of the crystallization sleeve (32), and the two support bases (33) respectively abut against the two ends of the cooling sleeve (31); The four sealing pillars (34) are respectively vertically arranged on the support base (33) at the top of the crystallizing sleeve (32); The four strip teeth (35) are respectively vertically arranged on the top of the corresponding sealing column (34); The protective slag adding component (4) includes a mounting bracket (41), four sealing sleeves (42), a cooling layer (43), a lubrication layer (44), a storage bin (45), four one-way ratchet assemblies (46), two crank connecting rod assemblies (47), and two T-joints (48), wherein, The mounting bracket (41) is fixedly installed on the top of the mounting platform (1), and the inner wall of the mounting bracket (41) abuts against the outer wall of the support seat (33) on the top of the crystallizing sleeve (32); The four sealing sleeves (42) are respectively fixedly disposed at the four corners of the mounting bracket (41), and the four sealing posts (34) are respectively located inside the corresponding sealing sleeves (42); The cooling layer (43) is fixedly disposed on the inner wall of the mounting bracket (41) above the crystallizing component (3), and the outer walls of the four sealing sleeves (42) are respectively located inside the cooling layer (43); The lubricating layer (44) is fixedly disposed on the top of the cooling layer (43), and the lubricating layer (44) is connected to the internal space of the four sealing sleeves (42); The two storage bins (45) are respectively mirror-arranged on both sides of the top of the lubrication layer (44), and the two storage bins (45) are respectively connected to the corresponding three-way pipes (48); The four one-way ratchet assemblies (46) are respectively disposed at both ends of the two crank connecting rod assemblies (47), and the four one-way ratchet assemblies (46) respectively mesh with the corresponding strip teeth (35); The two crank connecting rod assemblies (47) are respectively axially connected inside the lubrication layer (44), and the working ends of the two crank connecting rod assemblies (47) are respectively located in the corresponding three-way pipe (48); The two T-tubes (48) are respectively fixed on the inner wall of the lubrication layer (44) away from the mounting bracket (41), and one end of the two T-tubes (48) is respectively located in the two storage bins (45).

2. A crystallizer for continuous casting of large round and square stainless steel billets according to claim 1, characterized in that, The mounting platform (1) is shaped like a square and has a support sleeve (11) on top. The support sleeve (11) is T-shaped, and multiple grooves (111) are provided on the inner wall. The cooling jacket (31) is movably disposed inside the support sleeve (11).

3. A crystallizer for continuous casting of large round and square stainless steel billets according to claim 2, characterized in that, The cooling sleeve (31) and the mounting bracket (41) are respectively provided with connecting pipes (5), and the connecting pipes (5) on the mounting bracket (41) are in communication with the cooling layer (43); Multiple sliders (311) are also provided on the outer wall of the cooling jacket (31); The plurality of sliders (311) are respectively matched with the plurality of grooves (111), and the plurality of sliders (311) are respectively located in the corresponding grooves (111).

4. A crystallizer for continuous casting of large square and round stainless steel billets according to claim 1, characterized in that, A support lug (331) is provided on the side wall of the support seat (33) at the bottom of the crystallization sleeve (32). The telescopic end of the hydraulic rod (2) is connected to the support lug (331); Multiple heat dissipation fins (321) are fixedly provided on the outer wall of the crystallization sleeve (32).

5. A crystallizer for continuous casting of large square and round stainless steel billets according to claim 1, characterized in that, The lubrication layer (44) is provided with two sets of support plates (441). The two sets of crank connecting rod assemblies (47) are respectively mounted on the two sets of support plates (441).

6. A crystallizer for continuous casting of large square and round stainless steel billets according to claim 1, characterized in that, Each of the unidirectional ratchet assemblies (46) includes a drive tooth (461), a pawl (462), and a resilient element (463), wherein, The transmission gear (461) is sleeved on one end of the crank connecting rod assembly (47), and the transmission gear (461) is provided with external teeth (4611) and internal teeth (4612). The pawl (462) is rotatably mounted on one end of the crank connecting rod assembly (47), and the pawl (462) and the internal tooth (4612) engage with each other; One end of the elastic element (463) is fixedly disposed on one end of the crank connecting rod assembly (47), and the other end of the elastic element (463) is connected to the pawl (462); The external teeth (4611) mesh with the corresponding strip teeth (35).

7. A crystallizer for continuous casting of large round and square stainless steel billets according to claim 5, characterized in that, Each of the crank-connecting rod assemblies (47) includes two drive rods (471), two retaining sleeves (472), two cams (473), a connecting rod (474), and a piston (475), wherein, The two transmission rods (471) are respectively mirror-axis connected and mounted on a set of support plates (441), and a baffle (4711) is provided at one end of each of the two transmission rods (471). The two one-way ratchet assemblies (46) are respectively disposed on one end of the two transmission rods (471), and the two one-way ratchet assemblies (46) are respectively located on one side of the two baffles (4711); The two limiting sleeves (472) are respectively sleeved on the outer walls of the two transmission rods (471), and the two ends of each limiting sleeve (472) abut against the support plate (441) and the one-way ratchet assembly (46); The two cams (473) are respectively fixedly mounted on the ends of the two transmission rods (471) away from the one-way ratchet assembly (46); One end of the connecting rod (474) is pivotally connected to the opposite surfaces of the two cams (473), and the other end of the connecting rod (474) is pivotally connected to one end of the piston (475); The piston (475) is movably disposed inside the three-way tube (48).

8. A crystallizer for continuous casting of large round and square stainless steel billets according to claim 7, characterized in that, The three-way pipe (48) includes a piston pipe (481) and a feed pipe (482), wherein, The piston tube (481) is fixedly disposed on the inner wall of the lubrication layer (44) on the side away from the mounting bracket (41); One end of the feed pipe (482) is fixedly disposed on the top of the piston pipe (481), and the other end extends through the lubrication layer (44) to the interior of the corresponding storage bin (45), and the feed pipe (482) and the piston pipe (481) are interconnected. The piston (475) is movably disposed inside the piston tube (481), and the outer wall of the piston (475) abuts against the inner wall of the piston tube (481).

9. A crystallizer for continuous casting of large round and square stainless steel billets according to claim 3, characterized in that, The mounting platform (1), the support sleeve (11) and the mounting bracket (41) are respectively provided with corresponding mounting holes (6), and the support sleeve (11) and the mounting bracket (41) are respectively fixedly installed on the top of the mounting platform (1) through the mounting holes (6).

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