Uniform-heating double-layer graphite heater

Abstract

The utility model relates to the technical field of graphite heaters, discloses a double-layer graphite heater capable of uniformly heating, and solves the problems that a high-temperature point of an existing graphite heater is in a heating central position, no obvious temperature difference exists between the upper part and the lower part, the heating uniformity is poor, materials cannot be uniformly heated, and the heating efficiency is reduced. The device comprises a bottom plate, four supporting legs are annularly and fixedly installed on the top of the bottom plate at equal intervals, a first graphite heater is fixedly installed among the tops of the four supporting legs, a second graphite heater is fixedly installed in the first graphite heater, and a crucible is arranged in the second graphite heater; a mounting frame is fixedly mounted on one side of the top of the bottom plate; a motor is fixedly mounted in the middle of the top of the bottom plate; the high-temperature point of the graphite heater is positioned at the lower part, so that the temperature difference between the upper part and the lower part is obvious, the heating uniformity is good, materials can be uniformly heated, and the heating efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of graphite heaters, in particular to a double-layer graphite heater with uniform heating. Background Art

[0002] Graphite heaters are primarily used for heating various industrial processes that require precise temperature control and high thermal conductivity. Due to their excellent thermal conductivity and high-temperature resistance, graphite heaters are widely used in a variety of fields. Graphite heaters utilize the Joule heating effect generated when an electric current passes through graphite. Specifically, when current passes through the graphite element in a graphite heater, due to the electrical resistance of graphite, the current generates heat within the graphite. This heat is then transferred to the object or medium to be heated, thereby achieving the purpose of heating.

[0003] The existing patent (publication number: CN215420818U) is a graphite heater that is easy to cool. The cooling fan allows the internal air to flow more efficiently. At the same time, the exhaust fan can take away the hot air more quickly, thereby improving the cooling efficiency. At the same time, the heat is concentrated by the heat conductive plate, and then the heat is quickly taken away by the water cooling system, thereby improving the cooling efficiency. The cooling device is arranged outside the single crystal furnace through the liftable cooling structure. During the heating process of the graphite heater, the cooling device is not affected by the heating, and then after the heating is completed, it can be cooled more efficiently; however, the high temperature point of the graphite heater is at the center of the heating, but some thermal field structures require the bottom temperature to be significantly better than the top temperature, that is, there must be a significant temperature difference between the top and the bottom (such as: PVT method crystal growth, etc.). In response to this requirement, this heater will have usage limitations. At the same time, the heating uniformity of the graphite heater is not good, and the material cannot be heated evenly, thereby reducing the heating efficiency. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the existing technology, the utility model provides a double-layer graphite heater with uniform heating, which effectively solves the problem that the high temperature point of the existing graphite heater is at the center of the heating, there is no obvious temperature difference between the upper and lower parts, and the heating uniformity is poor, the material cannot be heated evenly, thereby reducing the heating efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-layer graphite heater with uniform heating, comprising a base plate, four supporting legs fixedly installed at equal distances in a ring on the top of the base plate, a first graphite heater fixedly installed between the tops of the four supporting legs, a second graphite heater fixedly installed inside the first graphite heater, a crucible provided inside the second graphite heater, a mounting frame fixedly installed on one side of the top of the base plate, a motor fixedly installed in the middle of the top of the base plate, a plurality of first flipping rods fixedly installed at equal distances in a ring on the lower part of the inner wall of the crucible, a plurality of second flipping rods provided at the lower part of the inside of the base plate, a transmission assembly provided at the output end of the motor, the transmission assembly being in transmission connection with the crucible and the plurality of second flipping rods, and when the motor is running, power is output to the crucible and the plurality of second flipping rods through the transmission assembly, so that the crucible rotates to drive the plurality of first flipping rods to flip the material, and the plurality of second flipping rods flip the material synchronously.

[0006] Preferably, the transmission assembly includes a first sprocket and a second sprocket, the first sprocket is fixedly mounted on the output end of the motor, the second sprocket is rotatably mounted on the lower part of one side of the mounting frame through a positioning seat, a first shaft is fixedly mounted on the top of the first sprocket, a first shaft sleeve is rotatably mounted on the surface of the first shaft, the first shaft sleeve is fixedly mounted between the bottoms of the first graphite heater and the second graphite heater, the top of the first shaft is fixedly connected to the crucible, and a first chain is meshed and connected between the second sprocket and the first sprocket.

[0007] Preferably, a second shaft is fixedly mounted on the top of the second sprocket, a second shaft sleeve is rotatably mounted on the surface of the second shaft, the second shaft sleeve is fixedly connected to the mounting frame through a fixed block, a third sprocket is fixedly mounted on the top of the second shaft, the top of the third sprocket is rotatably connected to the mounting frame, a second gear is rotatably mounted on one end of the top inside the mounting frame, a rotating rod is fixedly mounted on the bottom of the second gear, the lower part of the rotating rod extends to the interior of the crucible and is rotatably connected to a plurality of second flip rods, and the bottom end of the rotating rod is rotatably connected to the inner bottom of the crucible.

[0008] Preferably, one side of the second gear is meshed with the first gear, the top of the first gear is rotatably connected to the inner top of the mounting frame, the bottom of the first gear is fixedly mounted with a fourth sprocket, and the second chain is meshed with the third sprocket.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: when in use, the operator pours the material into the interior of the crucible, and then the operator starts the first graphite heater and the second graphite heater to heat the material. Due to the overlapping effect of the first graphite heater and the second graphite heater, the temperature of the lower part of the crucible is heated faster; at the same time, the operator starts the motor to drive the first sprocket to rotate, and when the first sprocket rotates, the first shaft rod is driven to rotate along the interior of the first sleeve, and when the first shaft rod rotates, the crucible is driven to rotate, and when the crucible rotates, the plurality of first turning rods are driven to turn the material;

[0010] When the first sprocket rotates, the second sprocket is driven by the first chain to rotate along the positioning seat, and when the second sprocket rotates, the second shaft rod is driven to rotate along the inside of the second shaft sleeve, and when the second shaft rod rotates, the third sprocket is driven to rotate along the mounting frame. When the third sprocket rotates, the fourth sprocket is driven by the second chain to rotate. When the fourth sprocket rotates, the first gear is driven by the second gear to rotate along the mounting frame. When the first gear rotates, the second gear is driven to rotate along the mounting frame. When the second gear rotates, it drives several second flipping rods to flip the material through the rotating rod. By flipping the material at the lower part of the crucible, it can be heated more evenly, thereby further improving the heating rate of the material, and thus ensuring that the temperature of the lower part of the crucible is higher than that of the upper part; the high temperature point of the graphite heater is located at the lower part, so that there is a significant temperature difference between the upper and lower parts, and the heating uniformity is good, which can make the material evenly heated, thereby improving the heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0012] In the attached figure:

[0013] Figure 1 Schematic diagram of the double-layer graphite heater for uniform heating in this utility model Figure 1 ;

[0014] Figure 2 Schematic diagram of the double-layer graphite heater for uniform heating in this utility model Figure 2 ;

[0015] Figure 3 This is a schematic diagram of the internal structure of the crucible of the utility model;

[0016] In the figure: 1. base plate; 2. support leg; 3. first graphite heater; 4. second graphite heater; 5. crucible; 6. first shaft rod; 7. first bushing; 8. first flip rod; 9. second flip rod; 10. motor; 11. first sprocket; 12. second sprocket; 13. first chain; 14. mounting bracket; 15. positioning seat; 16. second shaft rod; 17. second bushing; 18. third sprocket; 19. first gear; 20. fourth sprocket; 21. second chain; 22. second gear; 23. rotating rod; 24. fixing block. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] Depend on Figures 1 to 3 The utility model includes a base plate 1, four supporting legs 2 are fixedly installed in a ring at equal distances on the top of the base plate 1, a first graphite heater 3 is fixedly installed between the tops of the four supporting legs 2, a second graphite heater 4 is fixedly installed inside the first graphite heater 3, a crucible 5 is provided inside the second graphite heater 4, a mounting frame 14 is fixedly installed on one side of the top of the base plate 1, a motor 10 is fixedly installed in the middle of the top of the base plate 1, a plurality of first flipping rods 8 are fixedly installed in a ring at equal distances on the lower part of the inner wall of the crucible 5, a plurality of second flipping rods 9 are provided at the lower part of the interior of the base plate 1, a transmission assembly is provided at the output end of the motor 10, the transmission assembly is connected to the crucible 5 and the plurality of second flipping rods 9, and when the motor 10 is running, power is output to the crucible 5 and the plurality of second flipping rods 9 through the transmission assembly, so that the crucible 5 rotates to drive the plurality of first flipping rods 8 to flip the material, and the plurality of second flipping rods 9 flip the material synchronously.

[0019] During use, the operator pours the material into the crucible 5, and then the operator starts the first graphite heater 3 and the second graphite heater 4 to heat the material. Due to the overlapping effect of the first graphite heater 3 and the second graphite heater 4, the temperature of the lower part of the crucible 3 is heated faster; at the same time, the operator starts the motor 10 to drive the crucible 5 to rotate, and when the crucible 5 rotates, it drives several first turning rods 8 to turn the material; while the transmission component is running, it will further turn the material, and by turning the material in the lower part of the crucible 5, it can be heated more evenly, thereby further improving the heating rate of the material, thereby ensuring that the temperature of the lower part of the crucible 5 is higher than that of the upper part; the high temperature point of the graphite heater is located at the lower part, so that there is a significant temperature difference between the upper and lower parts, and the heating uniformity is good, which can make the material evenly heated, thereby improving the heating efficiency.

[0020] The transmission assembly includes a first sprocket 11 and a second sprocket 12. The first sprocket 11 is fixedly mounted on the output end of the motor 10. The second sprocket 12 is rotatably mounted on the lower part of one side of the mounting frame 14 through a positioning seat 15. The top of the first sprocket 11 is fixedly mounted with a first shaft rod 6. The surface of the first shaft rod 6 is rotatably mounted with a first shaft sleeve 7. The first shaft sleeve 7 is fixedly mounted between the first graphite heater 3 and the bottom of the second graphite heater 4. The top of the first shaft rod 6 is fixedly connected to the crucible 5. The second sprocket 12 and the first sprocket 11 are meshed with a first chain 13; the top of the second sprocket 12 is fixedly mounted with a second shaft rod 16. The surface of the second shaft rod 16 is rotatably mounted with a second shaft sleeve 17. The second shaft sleeve 17 is connected to the first graphite heater 3 and the second graphite heater 4 through a fixing block 24. The mounting frame 14 is fixedly connected, and a third sprocket 18 is fixedly installed on the top of the second shaft 16. The top of the third sprocket 18 is rotatably connected to the mounting frame 14. A second gear 22 is rotatably installed on one end of the top inner portion of the mounting frame 14. A rotating rod 23 is fixedly installed on the bottom of the second gear 22. The lower portion of the rotating rod 23 extends to the interior of the crucible 5 and is rotatably connected to a plurality of second flipping rods 9. The bottom end of the rotating rod 23 is rotatably connected to the inner bottom of the crucible 5; one side of the second gear 22 is meshed with the first gear 19, and the top of the first gear 19 is rotatably connected to the inner top of the mounting frame 14. A fourth sprocket 20 is fixedly installed on the bottom of the first gear 19, and a second chain 21 is meshed with the fourth sprocket 20 and the third sprocket 18.

[0021] The operator starts the motor 10 to drive the first sprocket 11 to rotate. When the first sprocket 11 rotates, it drives the first shaft 6 to rotate along the inside of the first sleeve 7. When the first shaft 6 rotates, it drives the crucible 5 to rotate. When the crucible 5 rotates, it drives several first flipping rods 8 to flip the material. When the first sprocket 11 rotates, it drives the second sprocket 12 to rotate along the positioning seat 15 through the first chain 13. When the second sprocket 12 rotates, it drives the second shaft 16 to rotate along the inside of the second sleeve 17. When the second shaft 16 rotates, it drives the third sprocket 18 along the installation seat When the mounting frame 14 rotates, the third sprocket 18 drives the fourth sprocket 20 to rotate through the second chain 21. When the fourth sprocket 20 rotates, it drives the first gear 19 to rotate along the mounting frame 14. When the first gear 19 rotates, it drives the second gear 22 to rotate along the mounting frame 14. When the second gear 22 rotates, it drives several second turning rods 9 to turn the material through the rotating rod 23. By turning the material at the bottom of the crucible 5, it can be heated more evenly, thereby further improving the heating rate of the material, thereby ensuring that the temperature of the lower part of the crucible 5 is higher than that of the upper part.

Claims

1. A double-layer graphite heater for uniform heating, comprising a bottom plate (1), characterized in that: Four support legs (2) are fixedly mounted in an annular manner at equal intervals on the top of the bottom plate (1); a first graphite heater (3) is fixedly mounted between the tops of the four support legs (2); a second graphite heater (4) is fixedly mounted inside the first graphite heater (3); a crucible (5) is provided inside the second graphite heater (4); a mounting frame (14) is fixedly mounted on one side of the top of the bottom plate (1); a motor (10) is fixedly mounted in the middle of the top of the bottom plate (1); and a lower portion of the inner wall of the crucible (5) is fixedly mounted in an annular manner at equal intervals. A plurality of first turning rods (8) are fixedly installed, a plurality of second turning rods (9) are provided at the lower part of the interior of the bottom plate (1), a transmission assembly is provided at the output end of the motor (10), and the transmission assembly is transmission-connected with the crucible (5) and the plurality of second turning rods (9). When the motor (10) is running, power is output to the crucible (5) and the plurality of second turning rods (9) through the transmission assembly, so that the crucible (5) rotates to drive the plurality of first turning rods (8) to turn over the material, and the plurality of second turning rods (9) turn over the material synchronously.

2. A double-layer graphite heater with uniform heating according to claim 1, characterized in that: The transmission assembly includes a first sprocket (11) and a second sprocket (12), the first sprocket (11) is fixedly mounted on the output end of the motor (10), the second sprocket (12) is rotatably mounted on the lower part of one side of the mounting frame (14) through a positioning seat (15), a first shaft (6) is fixedly mounted on the top of the first sprocket (11), a first shaft sleeve (7) is rotatably mounted on the surface of the first shaft (6), the first shaft sleeve (7) is fixedly mounted between the bottom of the first graphite heater (3) and the second graphite heater (4), the top of the first shaft (6) is fixedly connected to the crucible (5), and a first chain (13) is meshedly connected between the second sprocket (12) and the first sprocket (11).

3. A double-layer graphite heater with uniform heating according to claim 2, characterized in that: A second shaft (16) is fixedly mounted on the top of the second sprocket (12), a second sleeve (17) is rotatably mounted on the surface of the second shaft (16), the second sleeve (17) is fixedly connected to the mounting frame (14) through a fixing block (24), a third sprocket (18) is fixedly mounted on the top of the second shaft (16), the top of the third sprocket (18) is rotatably connected to the mounting frame (14), a second gear (22) is rotatably mounted on one end of the top of the mounting frame (14), a rotating rod (23) is fixedly mounted on the bottom of the second gear (22), the lower part of the rotating rod (23) extends to the interior of the crucible (5) and is rotatably connected to a plurality of second flipping rods (9), and the bottom end of the rotating rod (23) is rotatably connected to the inner bottom of the crucible (5).

4. A double-layer graphite heater with uniform heating according to claim 3, characterized in that: One side of the second gear (22) is meshedly connected with the first gear (19), the top of the first gear (19) is rotatably connected to the inner top of the mounting frame (14), the bottom of the first gear (19) is fixedly mounted with a fourth sprocket (20), and the fourth sprocket (20) and the third sprocket (18) are meshedly connected with a second chain (21).

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