A crucible fixing structure for an electron beam horizontal melting furnace

Abstract

The utility model relates to the field of crucible fixing, disclose a kind of for electron beam horizontal smelting furnace's crucible fixing structure, including frame, the top of the frame has two groups horizontal crucible, the inner wall of the frame is equipped with multiple groups double-end equal-length stud, the top of the frame is provided with multiple groups first support seat, the top of each group first support seat is respectively provided with a group first crucible pressing plate, multiple groups first crucible pressing plate and multiple groups first support seat are respectively sleeved in the outer wall of a group double-end equal-length stud.The utility model reserves necessary deformation space by the cooperation between groove and crucible outer buckle and crucible inner buckle, effectively relieves the internal stress caused by the difference of expansion coefficient, key components can be reused, not only play to the extreme crucible body life, also greatly reduce the spare parts procurement cost, reduce the risk of damaging crucible due to difficult disassembly, improve the safety and efficiency of maintenance operation.

Description

Technical Field

[0001] This utility model relates to the field of crucible fixing, and in particular to a crucible fixing structure for an electron beam horizontal melting furnace. Background Technology

[0002] Electron beam horizontal melting furnace is a device that uses a high-energy electron beam to bombard materials for melting. It is widely used in the melting and purification of high-melting-point metals, reactive metals and their alloys. The crucible, as one of the core components of the electron beam horizontal melting furnace, is used to hold the molten metal and controls the cooling and shaping rate of the molten metal through internal water-cooling pipes. Therefore, its fixing method directly affects the stability and safety of the melting process. In order to ensure the thermal conductivity of the horizontal crucible, existing horizontal crucibles are usually made of copper, a metal with good thermal conductivity, and water channels are opened inside the horizontal crucible to connect with the cooling system.

[0003] However, existing technical solutions have certain shortcomings. In existing electron beam furnaces, to prevent the horizontal crucible from separating from the moving platform, the fixing mechanism needs to have sufficient locking force and long-term fixation effect. The traditional method of fixing the crucible with screws and other fasteners by drilling screw holes on the top surface of the crucible compromises the integrity and strength of the crucible structure, creating stress concentration points. Furthermore, in high-temperature operating environments, the different coefficients of thermal expansion between the crucible and the screws easily generate thermal stress, leading to bolt stripping and crucible body cracking. This not only shortens the crucible's service life but also increases maintenance costs and operational complexity. Most importantly, due to the high precision requirements of threaded connections, once the crucible undergoes high-temperature deformation, the screw holes on its top will also undergo irreversible plastic deformation or misalignment. Even if the crucible body is mechanically corrected and repaired, these deformed or damaged threaded holes cannot be restored to their original state. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a crucible fixing structure for an electron beam horizontal melting furnace, which has the advantages of convenient assembly and disassembly, uniform thermal stress distribution, and good sealing performance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A crucible fixing structure for an electron beam horizontal melting furnace includes a frame. Two sets of horizontal crucibles are located at the top of the frame. Multiple sets of double-ended equal-length studs are fitted onto the inner wall of the frame. Multiple sets of first support seats are provided at the top of the frame. A set of first crucible pressure plates is provided at the top of each set of first support seats. The multiple sets of first crucible pressure plates and the multiple sets of first support seats are respectively fitted onto the outer wall of a set of double-ended equal-length studs. The multiple sets of first crucible pressure plates press against the four corners of the two sets of horizontal crucibles. Multiple sets of external crucible clips and multiple sets of internal crucible clips are provided at the top of the frame. The multiple sets of internal crucible clips are located between the two sets of horizontal crucibles, and the multiple sets of external and internal crucible clips abut against the horizontal crucibles. At both edges of the horizontal crucible, grooves are provided at the contact positions with the outer and inner crucible buckles. Two sets of hexagonal head screws are respectively fitted on the inner walls of each set of outer and inner crucible buckles. The hexagonal head screws extend through the bottom of the frame. The bottom end of the hexagonal head screws is threaded with a fixing nut. Multiple sets of second support seats are respectively provided between each pair of adjacent sets of outer and inner crucible buckles. A set of second crucible pressure plates is respectively provided at the top of each set of second support seats. The inner walls of the second support seats and the second crucible pressure plates are fitted on the outer walls of at least three sets of double-ended equal-length studs. A set of hexagonal flange nuts are threaded to both ends of each set of double-ended equal-length studs.

[0006] Furthermore, the horizontal crucible is made of copper, and a cooling water channel is provided on the inner wall of the horizontal crucible. One end of the horizontal crucible is connected to a water cooling pipe.

[0007] Furthermore, the frame is made of high-strength steel welded together, and an axle is mounted on the bottom end of the frame through a bearing seat. A pulley is fixedly sleeved on the outer wall of the axle.

[0008] Furthermore, a washer is fitted on the outer wall of the hexagon socket head cap screw, with one side of the washer adhering to the outer wall of the fixing nut and the other side of the washer adhering to the bottom end of the frame.

[0009] Furthermore, two sets of first brackets are fixedly connected to one end of the frame near the water cooling pipes, and two sets of second brackets are fixedly connected to the other end of the frame. A first cover plate is fixedly connected to the top of the two sets of first brackets, and a second cover plate is fixedly connected to the top of the two sets of second brackets.

[0010] This utility model has the following beneficial effects: This invention utilizes a downward-pressing fixing method combined with corresponding grooves to evenly distribute thermal and mechanical stress, avoiding stress concentration. It leverages the inherent nature of high-temperature deformation, and the fit between the grooves and the outer and inner clamps of the crucible provides necessary deformation space, effectively alleviating internal stress caused by differences in expansion coefficients. This fundamentally eliminates common problems in traditional screw fixings such as thread seizing and cracking. Furthermore, deformations of the crucible, first crucible pressure plate, second crucible pressure plate, outer clamp, and inner clamp can be mechanically corrected and repaired, allowing key components to be reused repeatedly. This new fixing method not only maximizes the lifespan of the crucible body but also significantly reduces spare parts procurement costs. In the long run, the lifespan of the crucible using this new fixing method is far superior to that of the traditional method. It avoids drilling holes on the top surface of the crucible, preserving the inherent overall structure and mechanical strength of the crucible. This improves reliability from the design source. When disassembling a horizontal crucible, there is no need to deal with screws that are stuck or stripped at high temperatures. Simply loosen the studs and release the pressure fixing state. This reduces the labor intensity of operators, reduces the risk of damaging the crucible due to disassembly difficulties, and improves the safety and efficiency of maintenance operations. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the test structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a front view structural diagram of the present invention; Figure 4 This is a schematic diagram of the rear view structure of this utility model.

[0012] Legend: 1. Horizontal crucible; 2. First crucible pressure plate; 3. Second crucible pressure plate; 4. First support base; 5. Second support base; 6. Crucible outer buckle; 7. Crucible inner buckle; 8. Double-ended equal-length stud; 9. Hexagonal flange nut; 10. Socket head cap screw; 11. Fixing nut; 12. First cover plate; 13. Second cover plate; 14. Chassis; 15. First bracket; 16. Second bracket. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Reference Figure 1 - Figure 4Embodiment 1 of this utility model: A crucible fixing structure for an electron beam horizontal melting furnace, including a frame 14, with two sets of horizontal crucibles 1 at the top of the frame 14, multiple sets of double-headed equal-length studs 8 sleeved on the inner wall of the frame 14, multiple sets of first support seats 4 at the top of the frame 14, and a set of first crucible pressure plates 2 at the top of each set of first support seats 4, the multiple sets of first crucible pressure plates 2 and the multiple sets of first support seats 4 respectively sleeved on the outer wall of a set of double-headed equal-length studs 8, and the multiple sets of first crucible pressure plates 2 respectively pressing on the four corners of the two sets of horizontal crucibles 14. The top of the frame 14 is provided with multiple sets of outer crucible buckles 6, and the top of the frame 14 is provided with multiple sets of inner crucible buckles 7. The multiple sets of inner crucible buckles 7 are located between two sets of horizontal crucibles 1. The multiple sets of outer crucible buckles 6 and inner crucible buckles 7 abut against the two side edges of the horizontal crucibles 1. The horizontal crucibles 1 have grooves at the contact positions with the outer crucible buckles 6 and inner crucible buckles 7. The inner walls of each set of outer crucible buckles 6 and inner crucible buckles 7 are respectively fitted with two sets of internal hexagonal head screws 10. The internal hexagonal head screws 10 extend through the bottom end of the frame 14, and the bottom end of the internal hexagonal head screws 10 is threaded with a fixing screw. Mother 11, with multiple sets of second support seats 5 respectively between each pair of adjacent sets of crucible outer buckles 6 and adjacent sets of adjacent sets of crucible inner buckles 7. Each set of second support seats 5 has a set of second crucible pressure plates 3 at its top. The inner walls of the second support seats 5 and the second crucible pressure plates 3 are fitted onto the outer walls of at least three sets of double-ended equal-length studs 8. Each set of double-ended equal-length studs 8 has a set of hexagonal flange nuts 9 threaded to both ends. The horizontal crucible 1 is made of copper. The inner wall of the horizontal crucible 1 has cooling water channels. One end of the horizontal crucible 1 is connected to a water cooling pipe. The frame 14 is made of high-strength steel. The frame 14 is welded together. The bottom end of the frame is equipped with an axle through a bearing seat. A pulley is fixedly fitted on the outer wall of the axle. A washer is fitted on the outer wall of the hexagonal head screw 10. One side of the washer is attached to the outer wall of the fixing nut 11, and the other side of the washer is attached to the bottom end of the frame 14. Two sets of first brackets 15 are fixedly connected to one end of the frame 14 near the water cooling pipe. Two sets of second brackets 16 are fixedly connected to the other end of the frame 14. A first cover plate 12 is fixedly connected to the top of the two sets of first brackets 15, and a second cover plate 13 is fixedly connected to the top of the two sets of second brackets 16.

[0015] The frame 14 is made of a higher-strength metal material. The horizontal crucible 1 is placed on top of the frame 14. During use, the first crucible pressure plate 2, the second crucible pressure plate 3, the inner crucible buckle 7, and the outer crucible buckle 6 are fixed to the frame 14 by double-ended equal-length studs 8 and hexagonal head screws 10, respectively, pressing down the horizontal crucible 1. Even if the horizontal crucible 1 deforms during the above process, it will not affect the double-ended equal-length studs 8 and hexagonal head screws 10. During disassembly, it is only necessary to loosen the fixing nut 11 and the hexagonal flange nut 9, and then the double-ended equal-length studs 8 and hexagonal head screws 10 can be pulled out from the frame 14. At this time, even if the first crucible pressure plate 2, the second crucible pressure plate 3, the first support seat 4, the second support seat 5, the outer crucible buckle 6, and the inner crucible buckle 7 are still present. The deformation can also lift the double-ended equal-length studs 8 and the internal hexagonal head screws 10 together with the above-mentioned parts, so as to separate them from the frame 14, thereby avoiding affecting the disassembly progress of the horizontal crucible 1. The double-ended equal-length studs 8 and the internal hexagonal head screws 10 do not directly contact the horizontal crucible 1, so they will not be subjected to increased heat during use, and the deformed parts can be mechanically corrected later. The double-ended equal-length studs 8 are used in conjunction with the hexagonal flange nut 9, and the internal hexagonal head screws 10 are used in conjunction with the fixing nut 11. This also avoids the problem that the corrected parts are not accurate enough to be screwed into the bolts. The first cover plate 12 and the second cover plate 13 at both ends of the frame 14 block the splashing metal droplets, preventing the metal droplets from splashing into the track below after falling into the horizontal crucible 1.

[0016] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A crucible fixing structure for an electron beam horizontal melting furnace, comprising a frame (14), characterized in that: The top of the frame (14) has two sets of horizontal crucibles (1). The inner wall of the frame (14) is fitted with multiple sets of double-headed equal-length studs (8). The top of the frame (14) is provided with multiple sets of first support seats (4). The top of each set of first support seats (4) is provided with a set of first crucible pressure plates (2). The multiple sets of first crucible pressure plates (2) and the multiple sets of first support seats (4) are respectively fitted onto the outer wall of a set of double-headed equal-length studs (8). The multiple sets of first crucible pressure plates (2) are respectively pressed against the four corners of the two sets of horizontal crucibles. The top of the frame (14) is provided with multiple sets of crucible outer buckles (6). The top of the frame (14) is provided with multiple sets of crucible inner buckles (7). The multiple sets of crucible inner buckles (7) are located between the two sets of horizontal crucibles (1). The multiple sets of crucible outer buckles (6) and crucible inner buckles (7) abut against the two sides of the horizontal crucibles (1). The crucible (1) has a groove at the contact position with the crucible outer buckle (6) and the crucible inner buckle (7). The inner walls of each set of crucible outer buckle (6) and crucible inner buckle (7) are respectively fitted with two sets of internal hexagonal head screws (10). The internal hexagonal head screws (10) extend through the bottom end of the frame (14). The bottom end of the internal hexagonal head screws (10) is threaded with a fixing nut (11). Multiple sets of second support seats (5) are respectively provided between each two adjacent sets of crucible outer buckles (6) and two adjacent sets of crucible inner buckles (7). The top end of each set of second support seats (5) is respectively provided with a set of second crucible pressure plates (3). The inner walls of the second support seats (5) and the second crucible pressure plates (3) are fitted on the outer walls of at least three sets of double-headed equal-length studs (8). The two ends of each set of double-headed equal-length studs (8) are respectively threaded with a set of hexagonal flange nuts (9).

2. The crucible fixing structure for an electron beam horizontal melting furnace according to claim 1, characterized in that: The horizontal crucible (1) is made of copper. The inner wall of the horizontal crucible (1) is provided with a cooling water channel, and one end of the horizontal crucible (1) is connected to a water cooling pipe.

3. The crucible fixing structure for an electron beam horizontal melting furnace according to claim 2, characterized in that: The frame (14) is made of high-strength steel welded together. The bottom end of the frame (14) is equipped with an axle through a bearing seat, and a pulley is fixedly sleeved on the outer wall of the axle.

4. The crucible fixing structure for an electron beam horizontal melting furnace according to claim 1, characterized in that: The outer wall of the internal hexagonal head screw (10) is fitted with a washer, one side of which is attached to the outer wall of the fixing nut (11), and the other side of which is attached to the bottom of the frame (14).

5. A crucible fixing structure for an electron beam horizontal melting furnace according to claim 1, characterized in that: Two sets of first brackets (15) are fixedly connected to one end of the frame (14) near the water cooling pipe, and two sets of second brackets (16) are fixedly connected to the other end of the frame (14). A first cover plate (12) is fixedly connected to the top of the two sets of first brackets (15), and a second cover plate (13) is fixedly connected to the top of the two sets of second brackets (16).

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