A continuous casting down-drawing crystallization device for preparing high-quality alloy materials

Abstract

The present invention belongs to the technical field of drawing crystallizers, and specifically relates to a continuous casting downward drawing crystallization device for preparing high-quality alloy materials, including a fixed cover plate and a first drawing pipe. The first drawing pipe is arranged on the bottom end face of the fixed cover plate, and an electromagnetic stirrer is arranged on the upper end face of the fixed cover plate. An inner wall pipe is arranged between the electromagnetic stirrer and the middle of the first drawing pipe. A copper sleeve is arranged outside the inner wall pipe in the first drawing pipe, and a first flow cavity is formed in the first drawing pipe outside the copper sleeve. A first water cooling assembly is arranged outside the first flow cavity. A second drawing pipe is arranged below the first drawing pipe, and a second water cooling assembly is arranged in the second drawing pipe. By adopting the novel downward drawing method, the present invention enables the billet to complete large-scale production processing. Through the arrangement of structures such as the electromagnetic stirrer, the inner wall pipe, and the first water cooling assembly, problems such as uneven distribution of elements inside the billet and easy oxidation and cracking on the surface can also be solved, effectively improving the forming quality of the billet.

Description

Technical Field

[0001] The present invention belongs to the technical field of drawing crystallizers, and particularly relates to a continuous casting down-drawing crystallization device for preparing high-quality alloy materials. Background Art

[0002] The crystallizer is one of the key equipment in the metal casting process, mainly used to cool and solidify molten metal into billets of the required shape. The design and performance of the crystallizer directly affect the quality and production efficiency of the billets. The development of the crystallizer is closely related to the casting method of alloy materials. The existing methods for casting alloy rods or wires are mainly the up-drawing process and the horizontal-drawing process. Therefore, the crystallizers are mainly the up-drawing type and the horizontal-drawing type. However, both the crystallizers and the processes have certain drawbacks. Among them, the up-drawing method will cause tearing of various crystals inside the billet, and the quality of the alloy will be greatly reduced. Therefore, the usage is gradually decreasing, and it is gradually occupied by the horizontal continuous casting crystallizer in the market.

[0003] For example, patent application No. CN114054693A discloses a crystallizer for horizontal continuous casting of non-ferrous alloys, which includes a cylindrical crystallization part, a cylindrical heat insulation part, and a cylindrical cooling part. The cylindrical crystallization part is horizontally arranged, the cylindrical heat insulation part is sleeved on the front outer peripheral side wall of the cylindrical crystallization part, and the cylindrical cooling part is sleeved on the rear outer peripheral side wall of the cylindrical crystallization part; a material channel running from front to back is provided inside the cylindrical crystallization part, and an air gap part is provided between the lower part of the outer peripheral side wall of the cylindrical crystallization part and the lower part of the inner peripheral side wall of the cylindrical cooling part. This crystallizer for horizontal continuous casting of non-ferrous alloys can be used in the horizontal continuous casting process of non-ferrous metals, making the billet cooled evenly up and down, with a relatively simple structure and low manufacturing cost, significantly improving the production efficiency, product performance and quality, and having high application value and promotion value.

[0004] In the prior art, through the improvement of the cooling structure, the problem of uneven up-and-down cooling of the billet during horizontal continuous casting is improved to a certain extent, but there are still many deficiencies:

[0005] First of all, during horizontal continuous casting, various metal elements are prone to precipitate downward, and the technical problems of uneven alloy composition of the overall billet and easy extrusion of the lower surface of the billet still cannot be solved. At the same time, the horizontal-drawing type cannot guarantee long-term and large-scale drawing production, and the problem of preparing long-sized or large-sized coils cannot be achieved. Usually, the rolling process is required to complete the forming treatment of the casting, and the operation is cumbersome.

[0006] Secondly, the existing crystallizers still mainly use a single-end cooling structure. When casting billets of copper alloys containing chromium and zirconium, the single-end cooling structure cannot perform a temperature-decreasing cooling treatment. The solution quickly enters the low-temperature crystallization part, and cracks and wrinkles are likely to appear on the outer surface, seriously affecting the product performance and quality;

[0007] Finally, when copper alloys containing elements such as chromium and zirconium crystallize, oxidation and other phenomena are likely to occur when they come into contact with the inner wall of the crystallization part, making it impossible to improve the roundness and smoothness of the outer surface. Existing crystallizers or crystallization processes cannot solve such technical problems. Summary of the Invention

[0008] In order to overcome the deficiencies of the prior art, the present invention provides a continuous casting down-drawing crystallization device for preparing high-quality alloy materials. By installing the present invention at the bottom drain opening of the alloy casting furnace and adopting a new down-drawing method, continuous bars can be directly formed from the billets, completing large-scale production processing. It also solves the problem that the billets are easily compressed. Through the setting of structures such as an electromagnetic stirrer, an inner wall tube, a first water cooling component, and a second water cooling component, problems such as uneven distribution of elemental crystals inside the billets and easy oxidation and cracking on the surface can also be solved, effectively improving the forming quality and forming efficiency of the billets.

[0009] To achieve the above object, the present invention provides the following technical solution: A continuous casting down-drawing crystallization device for preparing high-quality alloy materials, including a fixed cover plate and a first lead-out tube. The first lead-out tube is arranged on the bottom end surface of the fixed cover plate. An electromagnetic stirrer is coaxially arranged on the upper end surface of the fixed cover plate above the first lead-out tube. An inner wall tube is arranged between the electromagnetic stirrer and the middle of the first lead-out tube. A copper sleeve is arranged inside the first lead-out tube outside the inner wall tube. A first flow cavity is formed inside the first lead-out tube outside the copper sleeve. A first water cooling component is arranged outside the first flow cavity. A second lead-out tube is arranged below the first lead-out tube. The middle of the inner wall tube and the second lead-out tube is used for flowing alloy solution to complete the forming process. A second water cooling component is arranged inside the second lead-out tube;

[0010] The first water cooling component includes a water cooling inner tube arranged in the first flow cavity. A plurality of liquid spraying ports are arranged on the outer circumferential surface of the water cooling inner tube in a spiral upward direction. Each liquid spraying port is arranged at an inclination of 40 - 43 degrees.

[0011] Through the setting of the electromagnetic stirrer, the alloy solution can be quickly stirred and mixed before solidification, enabling various elements to be evenly distributed throughout the billets. In combination with the down-drawing method, it can not only solve the problem that the billets are easily extruded but also solve the problem of element segregation in the billets, playing a role in refining the solidification structure of the alloy, enabling the device to prepare fully equiaxed crystal continuous casting billets, and also improving the mechanical properties of the continuous casting billets;

[0012] Through the settings of the inner water-cooling pipe and the liquid spraying ports in the first water-cooling component, during the first-round cooling process of the billet, a spiral upward and rapidly spraying water flow can be formed outside the copper sleeve for heat dissipation. Compared with the traditional water-insulating layer type of heat dissipation, the heat transfer efficiency is improved, enabling the alloy solution to solidify rapidly and enhancing the forming quality of the casting bars.

[0013] By means of the downward extraction method in cooperation with multiple water-cooling components, during the solidification process of the alloy billet, a continuous alloy bar can be directly formed without subsequent rolling processes. While the equipment can complete the preparation of long-sized or large-sized coils, it also ensures rapid alloying and homogenization, guaranteeing the stability of the alloy composition.

[0014] In the above continuous casting downward extraction crystallization device for preparing high-quality alloy materials, the first water-cooling component further includes a plurality of first liquid inlet pipes arranged on one side of the bottom of the first flow cavity on the outer cylindrical surface of the first extraction pipe. A reflux tube barrel is arranged on the outer cylindrical surface of the top of the first extraction pipe, and a plurality of first liquid discharge pipes are communicated and arranged on the outer cylindrical surface of the reflux tube barrel. A plurality of reflux ports are communicated and arranged between the reflux tube barrel and the top of the first flow cavity.

[0015] Through the settings of the first liquid inlet pipe and the reflux port, the cooling water can enter from the bottom of the first flow cavity and be discharged upward from the top. In cooperation with the structure of the water-cooling inner pipe, a gradient cooling treatment can be formed outside the copper sleeve, further ensuring the forming effect of the casting.

[0016] In the above continuous casting downward extraction crystallization device for preparing high-quality alloy materials, the second water-cooling component includes a second flow cavity arranged inside the second extraction pipe. A second liquid inlet pipe is communicated and arranged on one side of the bottom of the second flow cavity, and a second liquid discharge pipe is communicated and arranged on one side of the top of the second flow cavity.

[0017] Through the two-stage cooling treatment, the temperature inside the alloy casting can be effectively reduced, and the outer surface can be effectively solidified, ensuring the forming effect.

[0018] In the above continuous casting downward extraction crystallization device for preparing high-quality alloy materials, the inner wall pipe is made of a non-high-purity boron nitride composite pipe with zirconia, and the inner cylindrical surface of the inner wall pipe is smoothed.

[0019] By adopting a non-high-purity boron nitride composite pipe containing zirconia, the service life of the inner wall pipe is effectively improved. Without increasing the device maintenance cost, it will not chemically react with metal elements such as chromium zirconium. At the same time, due to the relationship between its hardness and strength, there will be no phenomenon of burning and residue during the instantaneous contact of the alloy solution, enabling the outer surface of the alloy casting to have good smoothness and roundness in the early stage of forming.

[0020] In the above continuous casting down-drawing crystallization device for preparing high-quality alloy materials, the inner wall tube can also be selected as a graphite inner tube.

[0021] By adopting a graphite inner tube, when the device is used for casting alloy materials in small quantities with relatively ordinary quality requirements, the production cost can be effectively reduced.

[0022] In the above continuous casting down-drawing crystallization device for preparing high-quality alloy materials, a sunken toroidal surface is provided on the top end face of the first lead-out tube outside the copper sleeve. A detachable sealing cover plate is arranged inside the toroidal surface. A toroidal panel is arranged on the outer cylindrical surface of the copper sleeve inside the sealing cover plate. An annular groove is formed between the toroidal panel outside and the sealing cover plate and the toroidal surface.

[0023] Through the settings such as the sealing cover plate and the toroidal panel, not only can the sealing effect between the inner wall tube and the copper sleeve be ensured, but also the maintenance and disassembly are facilitated.

[0024] In the above continuous casting down-drawing crystallization device for preparing high-quality alloy materials, a first sealing ring is arranged inside the first lead-out tube below the copper sleeve and the inner wall tube. Through the setting of the first sealing ring, the sealing effect at the bottom of the copper sleeve and the inner wall tube is ensured.

[0025] In the above continuous casting down-drawing crystallization device for preparing high-quality alloy materials, a first connecting flange is arranged on the end face of the first lead-out tube close to the second lead-out tube. A second connecting flange is arranged on the end face of the second lead-out tube close to the first lead-out tube. A second sealing ring is arranged between the first connecting flange and the second connecting flange.

[0026] Through the settings such as the first connecting flange, the second connecting flange and the second sealing ring, the first lead-out tube and the second lead-out tube can be quickly disassembled, installed and maintained, reducing the use cost.

[0027] In the above continuous casting down-drawing crystallization device for preparing high-quality alloy materials, a plurality of support columns are arranged outside the electromagnetic stirrer. The height of each support column is slightly higher than the overall height of the electromagnetic stirrer. An electromagnetic input device is arranged on one side of the bottom of the electromagnetic stirrer. Through the setting of the support columns, it is ensured that the electromagnetic stirrer can also work stably under the high temperature in the alloy drawing furnace.

[0028] In the above continuous casting down-drawing crystallization device for preparing high-quality alloy materials, a connecting pipe head is arranged on the bottom end face of the second lead-out tube. Through the setting of the connecting pipe head, the device can be quickly used in cooperation with a variety of equipment.

[0029] To sum up, compared with the prior art, the beneficial effects of this solution are as follows:

[0030] (1) By adopting the design of downward lead-out installation of the device in combination with an electromagnetic stirrer and a multi-stage gradient cooling design, the alloy solution can automatically flow downward from the liquid discharge port at the bottom of the alloy casting furnace by its own gravity. While the alloy casting is not under compression, the electromagnetic stirrer can be used to agitate the uncured alloy solution at a high speed, so that various alloy elements can be evenly dispersed inside and outside the casting. The equipment can complete the preparation of long-sized or large-sized coils while ensuring rapid alloying and homogenization, ensuring the stability of the alloy composition, and effectively improving the mechanical properties of the alloy.

[0031] (2) Through the settings of the inner water-cooled pipe and the liquid spraying port in the first water-cooling component of the present invention, during the first round of cooling of the billet, a spiral upward and rapidly spraying water flow can be formed outside the copper sleeve for heat dissipation. Compared with the heat dissipation of the traditional water isolation layer, the heat exchange efficiency is improved, enabling the alloy to quickly solidify into a bar billet. With the downward water inlet structure, a gradient cooling treatment can also be formed, ensuring that the surface of the alloy billet will not be wrinkled or cracked during molding, and effectively improving the molding quality of the alloy material.

[0032] (3) By adopting a non-high-purity boron nitride composite pipe containing zirconia, the service life of the inner wall pipe is effectively improved. Without increasing the device maintenance cost, it will not chemically react with metal elements such as chromium zirconium. At the same time, due to the relationship between its hardness and strength, there will be no phenomenon of burning and residue during the instantaneous contact of the alloy solution. When the alloy casting is in the early stage of molding, a good surface finish and roundness will be formed on the outer surface. Brief Description of the Drawings

[0033] Figure 1 is a perspective view of the present invention;

[0034] Figure 2 is a front view of the present invention;

[0035] Figure 3 is a top view of the present invention;

[0036] Figure 4 is Figure 3 a perspective cross-sectional view at A-A in

[0037] Figure 5 is Figure 4 a partial enlarged view at B in

[0038] Figure 6 is Figure 4 a partial enlarged view at C in

[0039] Figure 7 is Figure 2 a perspective cross-sectional view at D-D in

[0040] Figure 8 is Figure 7 the partial enlarged view at position E in

[0041] Figure 9 the part drawing with multiple first liquid inlet pipes and multiple first liquid discharge pipes provided on the first lead-out pipe;

[0042] Figure 10 is the three-dimensional view of the water-cooled inner pipe part;

[0043] Figure 11 is the front view of the water-cooled inner pipe part;

[0044] Figure 12 is Figure 11 the plane cross-sectional view at F-F in

[0045] In the figure: fixed cover plate 10, electromagnetic stirrer 11, support column 12, inner wall pipe 13, first lead-out pipe 14, second lead-out pipe 15, return pipe cylinder 16, electromagnetic input device 17, first connection flange 18, second connection flange 19, connection pipe head 20, fastening bolt 21, first liquid discharge pipe 22, second liquid discharge pipe 23, water-cooled inner pipe 24, first flow cavity 25, second flow cavity 26, third liquid discharge pipe 27, sealing cover plate 28, liquid spraying port 29, copper sleeve 30, fixing nail 31, ring panel 32, annular groove 33, first sealing ring 34, second sealing ring 35, first liquid inlet pipe 36, second liquid inlet pipe 37, third liquid inlet pipe 38, return port 39. Specific embodiments

[0046] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0047] Embodiment 1:

[0048] A continuous casting down-drawing crystallization device for preparing high-quality alloy materials. The present invention adopts an advanced down-drawing process to solve the problem that when preparing traditional high-quality alloy materials such as chromium zirconium copper, only the up-drawing crystallization or horizontal-drawing crystallization technology can be used, but the overall quality of the alloy preparation cannot be improved. Through the setting of a multi-stage cooling system in cooperation with structures such as an electromagnetic stirrer and the inner wall pipe 13, the continuous casting down-drawing crystallization preparation of high-quality alloy materials is realized.

[0049] Refer to attached Figure 1 attachment Figure 2 attachment Figure 3 attachment Figure 4, To achieve the above object, a fixed cover plate 10 and a first lead-out pipe 14 are provided. The fixed cover plate 10 is integrally installed outside the bottom drain port of a traditional alloy casting furnace. On the end face of the fixed cover plate 10, a first lead-out pipe 14 with a hole in the middle is provided. Above the first lead-out pipe 14, an electromagnetic stirrer 11 is provided on the end face of the fixed cover plate 10. On one side of the bottom of the electromagnetic stirrer 11, an electromagnetic input device 17 is connected. At one end of the bottom of the electromagnetic input device 17, a plurality of ports for supplying power and magnetic flux to the electromagnetic stirrer 11 are provided. Specific power supply, magnetic flux supply, and related controls are all prior arts, and this solution will not be elaborated too much. The middle of the electromagnetic stirrer 11 is also in the shape of a hole and is coaxially arranged with the first lead-out pipe 14. The middle hole of the electromagnetic stirrer 11 is aligned with the bottom drain port of the alloy casting furnace;

[0050] A second lead-out pipe 15 is provided below the first lead-out pipe 14. A second connecting flange 19 is provided on the upper end face of the second lead-out pipe 15. A first connecting flange 18 is provided on the lower end face of the first lead-out pipe 14. The first connecting flange 18 and the second connecting flange 19 can be connected and fixed by a plurality of bolts and nuts. An inner wall pipe 13 is provided in the middle of the first lead-out pipe 14. One end of the inner wall pipe 13 abuts against the inner bottom end face of the first lead-out pipe 14. The other end of the inner wall pipe 13 passes through the middle hole of the electromagnetic stirrer 11 and extends outside the electromagnetic stirrer 11. The part of the inner wall pipe 13 extending outside the electromagnetic stirrer 11 will be inserted into the drain port of the alloy casting furnace. A copper sleeve 30 is provided inside the first lead-out pipe 14 outside the inner wall pipe 13. A first water cooling assembly is provided inside the first lead-out pipe 14 outside the copper sleeve 30. A second water cooling assembly is provided inside the second lead-out pipe 15 below the first lead-out pipe 14.

[0051] Specifically, the fixed cover plate 10 is installed outside the drain port of the crystallization casting furnace through bolts and other structures, so that the inner wall pipe 13 can be aligned and communicated with the drain port of the crystallization casting furnace. Then, the alloy liquid melted in the crystallization casting furnace can be discharged into the inner wall pipe 13. During this process, the electromagnetic input device 17 will be powered on and magnetized, thereby controlling the electromagnetic stirrer 11 to start. The magnetic field inside the electromagnetic stirrer 11 will generate a rotational force. At this time, since the alloy liquid has not flowed into the area of the first lead-out pipe 14, it has not cooled and solidified and has a certain fluidity. Therefore, the stirring force generated by the electromagnetic stirrer 11 can drive the alloy liquid flowing into the inner wall pipe 13 to stir at a high speed, forming a mixing effect, so that various metal elements in the alloy liquid can be evenly distributed throughout the alloy liquid, thereby effectively reducing the possibility of solute element segregation. Compared with the traditional horizontal lead-out method, this device and the supporting downward lead-out method reduce the occurrence of element accumulation and uneven distribution, and can effectively improve the forming quality of the alloy;

[0052] The alloy liquid that has been rotated at high speed to complete the uniform dispersion of elements will flow downward into the first lead-out pipe 14. The inner wall pipe 13 will conduct the high temperature inside the alloy to the copper sleeve 30. At this time, the first water-cooling component in the first lead-out pipe 14 will perform the first cooling treatment on the alloy, causing the outer part of the alloy to gradually solidify into a rod. The alloy rod that has gradually solidified on the outside will continue to move downward into the second lead-out pipe 15. The second water-cooling component in the second lead-out pipe 15 will perform a secondary cooling component, thereby conducting the heat inside the alloy rod, causing the alloy to completely form a rod, and finally discharging it outward through the bottom opening of the second lead-out pipe 15.

[0053] Refer to the attached Figure 3 , in the above solution, the inner wall pipe 13 is made of a non-high-purity boron nitride composite pipe with zirconia, and the inner circular surface is made smooth. In this solution, if a pure boron nitride composite pipe without zirconia is selected, its overall strength and hardness are insufficient, it is easy to be damaged and needs to be replaced for a long time. However, the overall strength and hardness of the boron nitride composite pipe with zirconia can be guaranteed. When the alloy solution enters the inside of the inner wall pipe 13, it will not burn the pipe orifice, and there will be no situation of residue being brought in. While the overall service life is effectively improved, due to the presence of zirconia, it will not chemically react with elements such as chromium zirconium that improve the alloy strength, and there will be no oxidation reaction. Therefore, the surface finish and roundness of the alloy rod will be effectively improved, which can effectively improve the forming quality and mechanical strength of the alloy rod.

[0054] The second lead-out pipe 15 is made of high-temperature-resistant stainless steel material, and the inner flow pipe wall is also made smooth. There is no inner wall pipe 13 on the inner circular surface of the second lead-out pipe 15. The purpose is that when the alloy rod moves into the second lead-out pipe 15, the outer circular surface of the alloy rod has been basically formed, so the circularity and finish have been determined. Therefore, only the heat inside the rod needs to be dissipated by heat conduction. Therefore, the inner wall pipe 13 is removed and the heat is directly conducted through the inner pipe surface of the second lead-out pipe 15, which improves the heat dissipation efficiency and reduces the usage amount of the inner wall pipe 13 to reduce the production cost.

[0055] Furthermore, refer to the attached Figure 1 、attached Figure 4 and attached Figure 7, To ensure that the electromagnetic stirrer 11 will not be burned out due to high temperature during use, a cooling structure is also provided inside the electromagnetic stirrer 11. The specific cooling structure is prior art and will not be elaborated in detail in this solution. A third drain pipe 27 and a third inlet pipe 38 are connected to the cooling structure inside the electromagnetic stirrer 11, which are used to introduce the refrigerated liquid into the cooling structure to cool the electromagnetic stirrer 11, thereby ensuring the normal use of the electromagnetic stirrer 11. In addition, a plurality of support columns 12 are provided outside the electromagnetic stirrer 11, and the height of each support column 12 is slightly higher than the upper end face of the electromagnetic stirrer 11. When the electromagnetic stirrer 11 and the fixed cover plate 10 are installed at the bottom of the alloy casting furnace, the upper end face of the support column 12 can be attached to the bottom of the alloy casting furnace, thereby avoiding the upper end face of the electromagnetic stirrer 11 directly attaching to the bottom end face of the alloy casting furnace, reducing the influence of the high temperature at the bottom of the casting furnace on the electromagnetic stirrer 11, ensuring the working efficiency and service life of the electromagnetic stirrer 11, improving the quality of the alloy bar, and reducing the production cost.

[0056] Further, referring to Appendix Figure 7 , Appendix Figure 8 , Appendix Figure 10 , Appendix Figure 11 and Appendix Figure 12 , To improve the refrigeration and forming efficiency of the alloy, a first cooling component is provided. The first cooling component includes a first inlet pipe 36 provided on the outer circumferential surface of one side at the bottom of the first outlet pipe 14. A first flow cavity 25 is formed between the inside of the first outlet pipe 14 and the copper sleeve 30. A water-cooled inner pipe 24 is provided in the first flow cavity 25. A plurality of inclined liquid spraying ports 29 are uniformly arranged on the outer circumferential surface of the water-cooled inner pipe 24 along the spiral direction, and the overall inclination angle of each liquid spraying port 29 is between 40 degrees and 43 degrees. A return pipe cylinder 16 is provided outside the top of the first flow cavity 25, and the return pipe cylinder 16 is connected to the first flow cavity 25 through a plurality of return ports 39. A first drain pipe 22 is connected and arranged on the outer circumferential surface of the return pipe cylinder 16.

[0057] Specifically, a water pump for supplying liquid is connected to the outside of the first liquid inlet pipe 36, and a pump for pumping liquid is connected to the outside of the first liquid discharge pipe 22. When the alloy solution is poured into the inner wall pipe 13, the first liquid inlet pipe 36 will pressurize the water flow and pour it into the first flow cavity 25. The water flow will flow upward from the bottom of the first flow cavity 25 and pass through a plurality of liquid spraying ports 29 to be sprayed on the outer circumferential surface of the copper sleeve 30, so as to cool the inner wall pipe 13 and the copper sleeve 30, and thus cool the alloy bar in the inner wall pipe 13. During this process, compared with the traditional holes without inclination angle, the plurality of liquid spraying ports 29 with inclination angles between 40 degrees and 43 degrees have a larger overall spraying area, improving the cooling coverage area of the copper sleeve 30. The spiral upward arrangement form will cause the water splashes sprayed from the plurality of liquid spraying ports 29 to converge into a water flow and roll upward in a spiral shape in the water-cooled inner pipe 24 during the process of contacting and impacting the copper sleeve 30, greatly increasing the flow rate of the water between the water-cooled inner pipe 24 and the copper sleeve 30, so as to quickly improve the heat dissipation efficiency. When the water flow quickly rolls to the top of the water-cooled inner pipe 24, it will be poured into the return pipe cylinder 16 through the top liquid spraying ports 29 and the return port 39, stored briefly in the return pipe cylinder 16, and finally quickly pumped out by the first liquid discharge pipe 22.

[0058] In the above solution, the refrigerated water is injected from the bottom and drawn out from the upper layer. This structural setting can ensure that the refrigerated water on the upper layer of the first lead-out pipe 14 will accumulate a certain temperature during the upward flow of the lower layer of water flow, making the water temperature of the upper layer higher than that of the lower layer. The overall temperature inside the first flow cavity 25 increases gradually, enabling the alloy bar to be cooled gradually, avoiding the situation of rapid refrigeration and cracking, and improving the forming quality. The return pipe cylinder 16 will form a heat-insulating and water-proof layer outside the first flow cavity 25 to further ensure the quality of the gradual temperature. In this solution, no water-proof layer will be formed inside the first flow cavity 25 during cooling. Only the water flow will be quickly sprayed on the copper sleeve 30 and form a spiral water flow. This setting has a faster heat exchange efficiency compared with the traditional water-proof layer form of cooling. The cooling water is not wrapped outside the copper sleeve 30, which can ensure that the copper sleeve 30 can fully conduct the heat of the alloy solution in the inner wall pipe 13 to the outer surface and then complete the cooling process. The cooling efficiency can be effectively improved while the water consumption will be greatly reduced, reducing the production cost.

[0059] Furthermore, referring to the attached Figure 4 and the attached Figure 7, the second cooling component includes a second flow cavity 26 disposed in the second lead-out pipe 15. A second liquid inlet pipe 37 is communicatively provided on the outer circumferential surface of the bottom of the second flow cavity 26, and a second liquid discharge pipe 23 is communicatively provided on the outer circumferential surface of the top of the second flow cavity 26. When the alloy bar moves into the second lead-out pipe 15, the second liquid inlet pipe 37 will pour cooling water into the second flow cavity 26 from the bottom. When the second flow cavity 26 is filled with cooling water, it is discharged outward through the second liquid discharge pipe 23 to complete the heat dissipation function. In this solution, a water isolation layer will be formed inside the second flow cavity 26. The purpose of this setting is different from that inside the first lead-out pipe 14. The alloy bar that moves into the second lead-out pipe 15 is basically formed, and only the internal depth needs to be cooled. The fast spray flow method can only quickly cool the outside, but the internal cooling time is slower. Therefore, the water isolation layer is set up to increase the cooling depth through the storage and flow of a large amount of water, so as to complete the cooling process. Therefore, the overall length of the second lead-out pipe 15 is much longer than that of the first lead-out pipe 14. This setting can ensure the quality of cooling and forming. The filling method of the second liquid discharge pipe 23 and the second liquid inlet pipe 37 makes the second flow cavity 26 the same as the first flow cavity 25, both having a gradually changing temperature from cold at the bottom to hot at the top, ensuring the stable forming process of the alloy bar.

[0060] Embodiment 2:

[0061] Reference appendix Figure 4 , appendix Figure 5 , appendix Figure 6 , appendix Figure 7 and appendix Figure 8, a continuous casting lower crystallization device for preparing high-quality alloy materials. In order to ensure that the inner wall tube 13 and the copper sleeve 30 and other structures can be quickly replaced and processed after long-term use, a downward-sunken annular surface is provided on the outside of the copper sleeve 30 at the top of the first lead-out tube 14, and a sealing cover plate 28 is embedded and pressed in the annular surface. A ring panel 32 is provided on the outer circular surface of the top of the copper sleeve 30 inside the sealing cover plate 28. On the outside of the ring panel 32, an annular groove 33 that cooperates with each other is provided on the annular surface and the end surface of the sealing cover plate 28. A plurality of fixing holes are provided on the end surface of the sealing cover plate 28 and the annular surface of the first lead-out tube 14. The sealing cover plate 28 is pressed on the top of the first lead-out tube 14 through the cooperation of the plurality of fixing holes and the fixing nails 31. When the copper sleeve 30 and the inner wall tube 13 need to be replaced, the staff will remove the electromagnetic stirrer 11 to expose the sealing cover plate 28, and then unscrew the multiple fixing nails 31 outwards, and then pull out the sealing cover plate 28, and then pull out the copper sleeve 30 and the inner wall tube 13 outwards, and then put in the new inner wall tube 13 and the copper sleeve 30. When putting in, the bottom end surface of the ring panel 32 will be supported by the groove formed by the annular groove 33 for height limiting. Then the staff will cover the sealing cover plate 28 so that the annular groove 33 can clamp the ring panel 32, and then screw back the fixing nails 31, and the electromagnetic stirrer 11 can be reinstalled to complete the replacement process;

[0062] A first ring-shaped sealing ring 34 is provided at the bottom of the first outlet pipe 14 below the copper sleeve 30 and the inner wall pipe 13. The first sealing ring 34 seals the bottom end surfaces of the inner wall pipe 13 and the copper sleeve 30. When the inner wall pipe 13 and the copper sleeve 30 are placed inside the first outlet pipe 14, the inner wall pipe 13 and the copper sleeve 30 are pressed against the upper end surface of the first sealing ring 34, thereby sealing the copper sleeve 30 and the inner wall pipe 13.

[0063] A second sealing ring 35 is provided on the mating end surfaces of the first connecting flange 18 and the second connecting flange 19 to seal the first connecting flange 18 and the second connecting flange 19 and ensure the forming quality of the alloy bar.

[0064] Example 3:

[0065] Reference Attachment Figure 2 and attached Figure 4 A continuous casting bottom-drawing crystallization device for preparing high-quality alloy materials. A connecting pipe head 20 that is docked with an external traction or winding structure is provided at the bottom of the second lead-out pipe 15. Two fastening bolts 21 are rotatably provided on both sides of the outer circular surface of the connecting pipe head 20. The staff can put the port of the winding structure on the outside of the connecting pipe head 20 and then fix it with the fastening bolts 21.

[0066] Example 4:

[0067] Reference AttachmentFigure 3 , A continuous casting down-drawing crystallization device for preparing high-quality alloy materials. The material of the inner wall tube 13 can also be selected as a graphite inner tube. The overall strength and service life of the graphite inner tube are shorter than those of the boron nitride composite tube. Although it is prone to damage, the overall cost is only one-tenth of that of the boron nitride composite tube, and the overall use cost is greatly reduced. When the forming demand of the alloy bar is small and the quality requirement is low, the graphite inner tube can be replaced to reduce the cost.

[0068] Example Five:

[0069] Reference appendix Figure 9 , A continuous casting down-drawing crystallization device for preparing high-quality alloy materials. When the alloy solution is cooled and formed for the first time at 15, the temperature inside and outside the alloy solution is extremely high. Therefore, in order to further improve the heat exchange efficiency, two or even more than two 36s can be symmetrically connected to the outer cylindrical surface at the bottom of 15, and two or even more than two 22s can be symmetrically connected to the outer cylindrical surface at the top of 16. Compared with a single 36 and 22, on the one hand, the uniformity of the overall water pressure can be improved whether the water enters or drains inside and outside 24, and the situation of uneven water flow due to excessive unilateral pressure will not occur. On the other hand, the water flow speed is accelerated, and the purpose of rapid heat dissipation can be better achieved.

[0070] As used in the specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of the components as the criterion for distinction. As used throughout the specification and claims, the term "comprising" is an open-ended term and should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0071] It should be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a commodity or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or system including the said element.

[0072] The foregoing description has shown and described several preferred embodiments of the present application. However, as previously mentioned, it should be understood that the present application is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the application concept described herein through the above teachings or the technology or knowledge in the relevant field. Any changes and variations made by those skilled in the art without departing from the spirit and scope of the present application shall fall within the protection scope of the appended claims of the present application.

Claims

1. A continuous casting down-drawing crystallization device for preparing high-quality alloy materials, including a fixed cover plate (10), a first extraction pipe (14), characterized in that, A first lead-out pipe (14) is provided on the bottom end face of the fixed cover plate (10). An electromagnetic stirrer (11) is coaxially arranged on the upper end face of the fixed cover plate (10) above the first lead-out pipe (14). An inner wall pipe (13) is arranged between the electromagnetic stirrer (11) and the middle of the first lead-out pipe (14). A copper sleeve (30) is arranged in the first lead-out pipe (14) outside the inner wall pipe (13). A first flow cavity (25) is formed in the first lead-out pipe (14) outside the copper sleeve (30). A first water-cooling assembly is arranged outside the first flow cavity (25). A second lead-out pipe (15) is arranged below the first lead-out pipe (14). The middle of the inner wall pipe (13) and the second lead-out pipe (15) is used for flowing alloy solution to complete the forming process. A second water-cooling assembly is arranged in the second lead-out pipe (15). The first water-cooling assembly includes a water-cooling inner pipe (24) arranged in the first flow cavity (25). A plurality of liquid spraying openings (29) are arranged on the outer circumferential surface of the water-cooling inner pipe (24) in a spiral upward direction. Each of the liquid spraying openings (29) is arranged at an inclination of 40 - 43 degrees. The spiral upward arrangement form will cause the water splashes ejected from the plurality of liquid spraying openings (29) to converge into a water flow and roll upward in a spiral shape in the water-cooling inner pipe (24) during the process of contacting and impacting the copper sleeve (30), greatly increasing the flow rate of the water between the water-cooling inner pipe (24) and the copper sleeve (30).

2. The continuous casting down-drawing crystallization device for preparing high-quality alloy materials according to claim 1, wherein The first water-cooling assembly further includes a plurality of first liquid inlet pipes (36) arranged on the outer circumferential surface of the first lead-out pipe (14) on one side of the bottom of the first flow cavity (25). A reflux pipe cylinder (16) is arranged on the outer circumferential surface of the top of the first lead-out pipe (14). A plurality of first liquid discharge pipes (22) are communicatedly arranged on the outer circumferential surface of the reflux pipe cylinder (16). A plurality of reflux openings (39) are communicatedly arranged between the reflux pipe cylinder (16) and the top of the first flow cavity (25).

3. The continuous casting down-drawing crystallization device for preparing high-quality alloy materials according to claim 1, characterized in that, The second water-cooling assembly includes a second flow cavity (26) arranged in the second lead-out pipe (15). A second liquid inlet pipe (37) is communicatedly arranged on one side of the bottom of the second flow cavity (26). A second liquid discharge pipe (23) is communicatedly arranged on one side of the top of the second flow cavity (26).

4. The continuous casting down-drawing crystallization device for preparing high-quality alloy materials according to claim 1, characterized in that, The inner wall pipe (13) is made of a boron nitride composite pipe with zirconia and non-high purity, and the inner circumferential surface of the inner wall pipe (13) is smoothed.

5. The continuous casting down-drawing crystallization device for preparing high-quality alloy materials according to claim 4, characterized in that, The inner wall pipe (13) can also be made of a graphite inner pipe.

6. The continuous casting down-drawing crystallization device for preparing high-quality alloy materials according to claim 1, characterized in that, A sunken annular surface is arranged on the top end face of the first lead-out pipe (14) outside the copper sleeve (30). A detachable sealing cover plate (28) is arranged in the annular surface. An annular panel (32) is arranged on the outer circumferential surface of the copper sleeve (30) inside the sealing cover plate (28). An annular groove (33) is formed between the sealing cover plate (28) and the annular surface outside the annular panel (32).

7. The continuous casting down-drawing crystallization device for preparing high-quality alloy materials according to claim 6, characterized in that, A first sealing ring (34) is arranged in the first lead-out pipe (14) below the copper sleeve (30) and the inner wall pipe (13).

8. A continuous casting down-drawing crystallization device for preparing high-quality alloy materials according to claim 7, characterized in that, A first connection flange (18) is provided on the end surface of the first extraction pipe (14) close to the second extraction pipe (15), a second connection flange (19) is provided on the end surface of the second extraction pipe (15) close to the first extraction pipe (14), and a second sealing ring (35) is provided between the first connection flange (18) and the second connection flange (19).

9. The continuous casting down-drawing crystallization device for preparing high-quality alloy materials according to claim 1, characterized in that, A plurality of support columns (12) are provided outside the electromagnetic stirrer (11), the height of each support column (12) is slightly higher than the overall height of the electromagnetic stirrer (11), and an electromagnetic inputter (17) is provided on one side of the bottom of the electromagnetic stirrer (11).

10. A continuous casting down-drawing crystallization device for preparing high-quality alloy materials according to claim 9, characterized in that, A connection pipe head (20) is provided on the bottom end surface of the second extraction pipe (15).

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