Semi-continuous casting crystallizer

Abstract

The utility model relates to the technical field of aluminum alloy semi-continuous casting, in particular to a semi-continuous casting crystallizer which is used for filtering cooling water, preventing a cooling water hole from being blocked, reducing the pressure of cooling water flow and avoiding the water return phenomenon caused by too high pressure and generated cast ingot surface cracks. Comprising a body, a graphite lining is embedded in an inner cavity of the body, and a dummy bar head is located below the body. The cooling water tank is located on the outer wall of the body, a water supply cavity is formed in the cooling water tank, the pressure reduction assembly is installed in the water supply cavity and divides the water supply cavity into an upper water cavity and a pressure reduction cavity, the output end of the water inlet assembly is located in the upper water cavity, and the filter assembly covers the output end of the water inlet assembly; a cooling water hole communicated with the pressure reducing cavity is formed in the lower part of the cooling water tank.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-continuous casting of aluminum alloys, in particular to a semi-continuous casting crystallizer. Background Art

[0002] At present, aluminum alloy casting usually adopts direct cooling semi-continuous casting process to produce aluminum alloy round ingots and flat ingots. Liquid aluminum melt is poured into the space surrounded by the crystallizer and the ingot starter. When the aluminum melt contacts the crystallizer and the ingot starter, the aluminum melt will be cooled by the crystallizer and the ingot starter and solidify along their boundaries. The prior art publication number CN101185960 proposes a crystallizer for aluminum alloy medium-frequency electromagnetic oscillation semi-continuous casting, including a crystallizer body and a graphite liner, the graphite liner is embedded in the inner wall of the crystallizer, an insulation cap is installed on the upper side of the graphite liner, an AC coil is arranged on the outside of the insulation cap, a DC coil is arranged on the outside of the AC coil, and an insulating gasket is arranged on the periphery of the AC coil and the DC coil, and the insulating gasket isolates the AC coil and the DC coil from the crystallizer body. However, semi-continuous casting has strict requirements on cooling water, especially impurities. Impurities in the water will block the cooling water channel in the crystallizer, resulting in uneven cooling of the ingot, affecting the quality of the ingot, and even leading to casting failure. At the same time, when the water pressure is too high, the cooling water flow impacts the surface of the ingot and disperses, which easily causes part of the water flow to return upward along the surface of the ingot. In severe cases, it enters the surface of the aluminum liquid inside the crystallizer, resulting in uneven local cooling of the ingot and surface cracks. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a semi-continuous casting crystallizer which filters cooling water, prevents clogging of cooling water holes, reduces the pressure of cooling water flow, avoids water backflow caused by excessive pressure and the resulting cracks on the ingot surface.

[0004] The utility model discloses a semi-continuous casting crystallizer, comprising a main body, an inner cavity of the main body is embedded with a graphite lining, and an ingot starter is located below the main body; further comprising a cooling water tank, a water inlet assembly, a pressure reducing assembly and a filter assembly, the cooling water tank is located on the outer wall of the main body, a water supply cavity is arranged inside the cooling water tank, the pressure reducing assembly is arranged in the water supply cavity, and the cooling water tank is divided into an upper water cavity and a pressure reducing cavity, the output end of the water inlet assembly is arranged in the upper water cavity, the filter assembly cover is arranged at the output end of the water inlet assembly, and a cooling water hole connected with the pressure reducing cavity is arranged at the lower part of the cooling water tank; before starting the semi-continuous casting of aluminum alloy, a layer of lubricating oil is evenly applied on the surface of the graphite lining, the ingot starter is raised to the lower edge of the graphite lining to form a semi-enclosed space, water is supplied to the upper water cavity through the water inlet assembly, water is filtered through the filter assembly to prevent clogging of the cooling water hole, and the water is decompressed by the pressure reducing assembly and then sprayed outward through the cooling water hole to reduce the pressure of the cooling water flow, thereby effectively avoiding the phenomenon of water return caused by excessive pressure and the resulting ingot surface cracks, and improving the production quality.

[0005] Preferably, the water inlet assembly includes two water inlet pipes, two water branch pipes and multiple water inlet branches. The water inlet pipes are located at the left and right ends of the bottom of the cooling water tank. The output end of the water inlet pipe is connected to the input end of the water branch pipe. Multiple water inlet branches are evenly connected to the water branch pipe. The water inlet branches extend into the upper water cavity of the cooling water tank. The cooling water pipeline is connected to the water inlet pipe, and water is supplied to the upper water cavity through the water branch pipe and the water inlet pipe. The water supply efficiency is guaranteed through multiple water inlet branches to prevent the cooling water from being cut off.

[0006] Preferably, it also includes an upper cover, a sealing ring and multiple fixing plates, the upper cover is installed on the top of the cooling water tank, a sealing groove is provided at the top of the cooling water tank, a sealing ring matching the sealing groove is installed at the bottom end of the upper cover, fixing plates are installed at the left and right ends of the upper cover, fixing holes are provided on the fixing plates, and limiting screw holes are provided at the left and right ends of the cooling water tank; the upper cover is installed on the top of the cooling water tank, the fixing bolts pass through the fixing plates, and the fixing plates are fixed to the outer wall of the cooling water tank, so that the upper cover seals the water supply cavity in the cooling water tank, and the sealing performance is improved by the sealing ring. By unscrewing the fixing bolts, the upper cover can be removed from the top of the cooling water tank, which is convenient for maintenance of the internal equipment and improves convenience.

[0007] Preferably, the filter assembly includes two filter covers, two groups of support rods, two sealing plates, two groups of handles and multiple fixing bolts. The filter cover is installed at the output end of the water inlet pipe at the bottom of the upper water chamber of the cooling water tank. The top of the filter cover is evenly connected to multiple support rods. Inspection ports are opened at the left and right ends of the top of the upper cover. The sealing plate is installed on the inspection port through the fixing bolts and the sealing cover is installed on the inspection port. The top of the support rod is connected to the bottom end of the sealing plate. Two handles are installed on the top of the sealing plate. The cooling water output by the water inlet pipe is filtered through the filter cover to block impurities and prevent clogging of the cooling water hole. After long-term use, unscrew the fixing bolts, pull up the sealing plate at the inspection port through the handle, take out the filter cover in the upper water chamber, and clean it.

[0008] Preferably, the pressure reducing assembly includes a flow-relief plate, which is fixedly installed in the water supply chamber of the cooling water tank to divide it into an upper water chamber and a pressure reducing chamber, and the top of the flow-relief plate is sealed and connected to the bottom end of the upper cover; after the water enters the upper water chamber, the water flow is slowed down by the flow-relief plate to reduce the water pressure and the pressure of the cooling water flow, thereby effectively avoiding the backflow phenomenon caused by excessive pressure and the resulting cracks on the ingot surface.

[0009] Preferably, the cooling water holes include a first group of cooling water holes A and a second group of cooling water holes B. The first group of cooling water holes A and the second group of cooling water holes B are arranged at the bottom of the decompression chamber. The first group of cooling water holes A and the second group of cooling water holes B are arranged in a cross shape. The angle of the first group of cooling water holes A is greater than 40°, and the angle of the second group of cooling water holes B is less than 40°. The cooling water in the decompression chamber is sprayed out through the first group of cooling water holes A and the second group of cooling water holes B, and the cooling water sprayed out from the second group of cooling water holes B forms a cooling water flow with a low incident angle.

[0010] Compared with the prior art, the utility model has the following beneficial effects: before starting the semi-continuous casting of aluminum alloy, a layer of lubricating oil is evenly applied on the surface of the graphite lining, the ingot guide head is raised to the lower edge of the graphite lining to form a semi-enclosed space, water is supplied to the upper water cavity through the water inlet component, the water is filtered through the filter component to prevent clogging of the cooling water hole, and the water is decompressed by the decompression component and then sprayed out through the cooling water hole to reduce the pressure of the cooling water flow, thereby effectively avoiding the backflow phenomenon caused by excessive pressure and the resulting cracks on the ingot surface, thereby improving production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a right view structural schematic diagram of the utility model;

[0013] Figure 3 It is a front cross-sectional structural schematic diagram of the utility model;

[0014] Figure 4 It is a left-side cross-sectional structural schematic diagram of the utility model;

[0015] Figure 5 It is a schematic diagram of the cross-sectional structure of the utility model viewed from above;

[0016] Markings in the attached drawings: 1. Main body; 2. Graphite lining; 3. Ingot head; 4. Cooling water tank; 5. Water inlet pipe; 6. Water distribution pipe; 7. Water inlet branch pipe; 8. Upper cover; 9. Sealing ring; 10. Fixed plate; 11. Filter cover; 12. Support rod; 13. Sealing plate; 14. Handle; 15. Fixing bolt; 16. Slow flow plate; 17. The first group of cooling water holes A; 18. The second group of cooling water holes B. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0018] like Figures 1 to 5 As shown, the inner cavity of the body 1 is embedded with a graphite lining 2, the ingot head 3 is located below the body 1, the cooling water tank 4 is located on the outer wall of the body 1, the upper cover 8 is mounted on the top of the cooling water tank 4, the top of the cooling water tank 4 is provided with a sealing groove, the bottom of the upper cover 8 is provided with a sealing ring 9 matching the sealing groove, the left and right ends of the upper cover 8 are provided with fixing plates 10, the fixing plates 10 are provided with fixing holes, the left and right ends of the cooling water tank 4 are provided with limited screw holes, the interior of the cooling water tank 4 is provided with a water supply cavity, the slow flow plate 16 is fixedly installed in the water supply cavity of the cooling water tank 4, and it is divided into an upper water cavity and a decompression cavity, the top of the slow flow plate 16 is sealed and connected to the bottom end of the upper cover 8, the water inlet pipe 5 is located at the left and right ends of the bottom of the cooling water tank 4, the output end of the water inlet pipe 5 is connected to the input end of the water distribution pipe 6, and the water distribution pipe 6 is evenly connected with a plurality of water inlet branch pipes 7, the water inlet branch pipes 7 extend into the upper water cavity of the cooling water tank 4, the filter cover 11 is mounted on the output end of the water inlet branch pipe 7 at the bottom of the upper water cavity of the cooling water tank 4, the top of the filter cover 11 is evenly connected with a plurality of support rods 12, the left and right ends of the top of the upper cover 8 are provided with inspection ports, the sealing plate 13 is sealed and mounted on the inspection ports by fixing bolts 15, the top of the support rod 12 is connected to the bottom end of the sealing plate 13, and two handles 14 are installed on the top of the sealing plate 13, the bottom of the decompression cavity is provided with a first group of cooling water holes A17 and a second group of cooling water holes B18, the first group of cooling water holes A17 and the second group of cooling water holes B18 are arranged in a cross shape, the angle of the first group of cooling water holes A17 is greater than 40°, and the angle of the second group of cooling water holes B18 is less than 40°;

[0019] Before starting the semi-continuous casting of aluminum alloy, a layer of lubricating oil is evenly applied on the surface of the graphite liner 2, the ingot guide head 3 is raised to the lower edge of the graphite liner 2 to form a semi-enclosed space, the cooling water pipeline is connected to the water inlet pipe 5, and water is supplied to the upper water cavity through the water distribution pipe 6 and the water inlet branch pipe 7. The water supply efficiency is ensured by multiple water inlet branch pipes 7 to prevent the cooling water from being cut off. The upper cover 8 is installed on the top of the cooling water tank 4, and the fixing bolts pass through the fixing plate 10 to fix the fixing plate 10 on the outer wall of the cooling water tank 4, so that the upper cover 8 seals the water supply cavity in the cooling water tank 4, and the sealing performance is improved by the sealing ring 9. After unscrewing the fixing bolts, the upper cover 8 can be removed from the top of the cooling water tank 4, which is convenient for the maintenance of the internal equipment and improves convenience. The cooling water output by the water inlet branch pipe 7 is filtered through the filter cover 11 to block impurities and prevent clogging of the cooling water holes. After long-term use, unscrew the fixing bolts 15, pull up the sealing plate 13 at the inspection port through the handle 14, take out the filter cover 11 in the upper water cavity, and clean it. After the water enters the upper water cavity, the water flow is slowed down by the slow flow plate 16 to reduce the water pressure and the pressure of the cooling water flow, thereby effectively avoiding the backflow phenomenon caused by excessive pressure and the resulting cracks on the surface of the ingot. The cooling water in the decompression cavity is sprayed out through the first group of cooling water holes A17 and the second group of cooling water holes B18, and the cooling water sprayed out from the second group of cooling water holes B18 forms a cooling water flow with a low incident angle.

[0020] like Figures 1 to 5 As shown, a semi-continuous casting crystallizer of the utility model, when it is working, before the semi-continuous casting of aluminum alloy, a layer of lubricating oil is evenly applied on the surface of the graphite lining 2, the ingot head 3 is raised to the lower edge of the graphite lining 2 to form a semi-enclosed space, the cooling water pipeline is connected to the water inlet pipe 5, and water is supplied to the upper water cavity through the water distribution pipe 6 and the water inlet branch pipe 7. The cooling water output by the water inlet branch pipe 7 is filtered by the filter cover 11. After the water enters the upper water cavity, the water flow is slowed down by the slow flow plate 16 to reduce the water pressure and the pressure of the cooling water flow. The cooling water in the decompression cavity is sprayed out through the first group of cooling water holes A17 and the second group of cooling water holes B18. After long-term use, the fixing bolts 15 are unscrewed, the sealing plate 13 is pulled up at the inspection port by the handle 14, the filter cover 11 is taken out of the upper water cavity, cleaned, and the fixing bolts are unscrewed. The upper cover 8 can be removed from the top of the cooling water tank 4 to facilitate the inspection of the internal equipment.

[0021] The filter cover 11 and the slow flow plate 16 of the semi-continuous casting crystallizer of the utility model are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in the field.

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A semi-continuous casting crystallizer, comprising a body (1), the inner cavity of the body (1) is embedded with a graphite lining (2), and a starter head (3) is located below the body (1); characterized in that: The invention also comprises a cooling water tank (4), a water inlet assembly, a pressure reducing assembly and a filter assembly. The cooling water tank (4) is located on the outer wall of the main body (1). A water supply chamber is arranged inside the cooling water tank (4). The pressure reducing assembly is installed in the water supply chamber, which is divided into an upper water chamber and a pressure reducing chamber. The output end of the water inlet assembly is located in the upper water chamber. The filter assembly cover is installed at the output end of the water inlet assembly. A cooling water hole connected to the pressure reducing chamber is arranged at the lower part of the cooling water tank (4).

2. A semi-continuous casting crystallizer according to claim 1, characterized in that: The water inlet assembly comprises two water inlet pipes (5), two water branch pipes (6) and a plurality of water inlet branch pipes (7). The water inlet pipes (5) are located at the left and right ends of the bottom of the cooling water tank (4). The output end of the water inlet pipe (5) is connected to the input end of the water branch pipe (6). The water branch pipes (6) are evenly connected to the plurality of water inlet branch pipes (7). The water inlet branch pipes (7) extend into the upper water cavity of the cooling water tank (4).

3. A semi-continuous casting crystallizer according to claim 1, characterized in that: It also includes an upper cover (8), a sealing ring (9) and a plurality of fixing plates (10), wherein the upper cover (8) is mounted on the top of the cooling water tank (4), a sealing groove is provided at the top of the cooling water tank (4), a sealing ring (9) matching the sealing groove is installed at the bottom of the upper cover (8), fixing plates (10) are installed at the left and right ends of the upper cover (8), fixing holes are provided on the fixing plates (10), and limiting screw holes are provided at the left and right ends of the cooling water tank (4).

4. A semi-continuous casting crystallizer as claimed in claim 3, characterized in that: The filter assembly comprises two filter covers (11), two groups of support rods (12), two sealing plates (13), two groups of handles (14) and a plurality of fixing bolts (15). The filter cover (11) is mounted on the output end of the water inlet branch pipe (7) at the bottom of the upper water chamber of the cooling water tank (4). The top of the filter cover (11) is evenly connected to a plurality of support rods (12). Inspection ports are provided at the left and right ends of the top of the upper cover (8). The sealing plate (13) is sealed and mounted on the inspection port through the fixing bolts (15). The top of the support rod (12) is connected to the bottom of the sealing plate (13). Two handles (14) are installed on the top of the sealing plate (13).

5. A semi-continuous casting crystallizer as claimed in claim 3, characterized in that: The pressure reducing assembly comprises a slow flow plate (16), which is fixedly installed in the water supply chamber of the cooling water tank (4) to divide the chamber into an upper water chamber and a pressure reducing chamber, and the top of the slow flow plate (16) is sealedly connected to the bottom end of the upper cover (8).

6. A semi-continuous casting crystallizer according to claim 1, characterized in that: The cooling water holes include a first group of cooling water holes A (17) and a second group of cooling water holes B (18). The first group of cooling water holes A (17) and the second group of cooling water holes B (18) are arranged at the bottom of the decompression chamber. The first group of cooling water holes A (17) and the second group of cooling water holes B (18) are arranged in a cross shape. The angle of the first group of cooling water holes A (17) is greater than 40 degrees, and the angle of the second group of cooling water holes B (18) is less than 40 degrees.

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