Carbon-carbon coated reinforced graphite foot plate for producing single crystal by Czochralski method

Abstract

The utility model discloses a carbon-carbon coated reinforced graphite foot plate for producing single crystal by a czochralski method, and particularly relates to the technical field of graphite foot plates, the carbon-carbon coated reinforced graphite foot plate comprises a graphite foot plate and a heater body, two connecting blocks are arranged at the bottom of the heater body, and connecting mechanisms are arranged at the bottoms of the two connecting blocks. The connecting mechanism comprises a plurality of threaded holes formed in the surface of a graphite foot plate, the cross section of the graphite foot plate is arranged to be in an L shape, bolts are arranged in the threaded holes, a mounting groove is formed in the surface of the graphite foot plate, and the interior of the mounting groove is movably connected with the bottom of a connecting block in a clamped mode. And a connecting hole is formed in the bottom of the graphite foot plate. According to the graphite foot plate, corrosion is reduced, deformation of the foot plate can be reduced through the wrapped graphite foot plate, the service life of the graphite foot plate is prolonged, the stability of the device is greatly improved, and the application range of the device is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite foot plates, and more specifically, to a carbon-coated reinforced graphite foot plate used for producing single crystals by a Czochralski method. Background Art

[0002] The photovoltaic industry is ready to take off. The cost issue of single crystal furnaces is the focus of common concern among people in the photovoltaic industry. The reduction of non-silicon costs is the driving force for the continued effective development of single crystals, reducing the production cost of single crystal silicon wafers and achieving grid parity. The size of single crystal furnaces and large-size thermal fields are changing rapidly. Graphite heating elements are generally set at the bottom of the single crystal furnace, which plays a greater role in the normal operation of the single crystal furnace.

[0003] Patent application publication number: CN202744655U A graphite heater used in preparing single crystal silicon by the direct pulling method achieves the effect of a bottom heater without modifying the single crystal furnace equipment, saving the cost of technical upgrading. Compared with traditional cylindrical graphite heaters of the same size, the graphite heater of the utility model has the characteristics of high thermal energy utilization, saving 4% to 8% of energy, and when pulling single crystals larger than 9 inches, the temperature control is stable, the heat convection of the silicon solution is small, and the crystallization rate is increased by 2% to 4%.

[0004] However, in actual use, thermal shock will occur after the current is passed, which will cause the joint between the heater body and the bottom heating element to be thin and easy to break, thereby shortening the life of the heater body and increasing the cost of use. In addition, the size of the bottom support feet is fixed, and the scope of application is small. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a carbon-coated reinforced graphite foot plate for producing single crystals by the Czochralski method, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A carbon-coated reinforced graphite foot plate for producing single crystals by a Czochralski method, comprising a graphite foot plate and a heater body, wherein two connecting blocks are arranged at the bottom of the heater body, and a connecting mechanism is arranged at the bottom of the two connecting blocks;

[0008] The connecting mechanism includes a plurality of threaded holes provided on the surface of a graphite foot plate, the cross section of the graphite foot plate is provided in an L shape, bolts are provided inside the plurality of threaded holes, a mounting groove is provided on the surface of the graphite foot plate, the inside of the mounting groove is movably engaged with the bottom of the connecting block, a connecting hole is provided at the bottom of the graphite foot plate, a connecting column is provided inside the connecting hole, and a carbon-carbon material layer is provided on the outer wall of the graphite foot plate.

[0009] By adopting the above technical solution: coating the carbon-carbon composite material with a graphite conductor, the original graphite foot plate can be appropriately thinned to reduce the cost in order to improve its own strength, and the load-bearing capacity of the foot plate is enhanced, making it less likely to break.

[0010] As a further description of the above technical solution: a spring is arranged inside the connecting hole, a first fixing plate is arranged on one side of the spring, a connecting groove is opened on the surface of the graphite foot plate, a threaded rod is arranged inside the connecting groove, and a second fixing plate is arranged on one side of the threaded rod.

[0011] By adopting the above technical solution, the connecting column can be horizontally moved in the movable groove, thereby improving the application range of the device.

[0012] As a further description of the above technical solution: the surfaces of the first fixing plate and the second fixing plate are both arranged to be arc-shaped, a main heater foot plate is arranged at the bottom of the graphite foot plate, and a movable groove is opened on the surface of the main heater foot plate.

[0013] By adopting the above technical solution: in order to achieve better fixing effect, the work efficiency is improved.

[0014] As a further description of the above technical solution: the connecting column is slidably connected to the movable groove, and the end of the threaded rod located outside the connecting hole is fixedly connected to a cap head.

[0015] By adopting the above technical solution: in order to facilitate the rotation of the threaded rod.

[0016] Technical effects and advantages of the utility model:

[0017] 1. By setting a connection mechanism, compared with the prior art, a layer of carbon-carbon material is deposited on the outer wall of the original graphite foot plate to wrap the graphite foot plate, which plays a role in reducing corrosion and extending the life of the graphite foot plate. The wrapped graphite foot plate can reduce the deformation of the foot plate, and also enhance the load-bearing capacity of the foot plate, which is not easy to break. Moreover, the spacing adjustment of the main heater foot plate will not be affected by the heater body, thereby reducing the damage rate of the heater body and the main heater foot plate caused by deformation and extending the service life;

[0018] 2. By setting the main heater foot plate, the first fixed plate, the second fixed plate and the connecting column, compared with the prior art, when the main heater foot plate is deformed, it will drive the first fixed plate to move horizontally. At this time, because the first fixed plate receives the rebound force, it drives the driving spring to move, and the first fixed plate and the second fixed plate will always be in contact with the connecting column to avoid the main heater foot plate and the graphite foot plate from shaking, thereby greatly improving the stability of the device, and the connecting column moves horizontally in the movable groove, thereby improving the scope of application of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the overall side structure of the utility model.

[0021] Figure 3 It is a schematic diagram of the connecting mechanism structure of the utility model.

[0022] Figure 4 It is a schematic diagram of the top view of the connecting mechanism of the utility model.

[0023] The accompanying drawings are marked as follows: 1. graphite foot plate; 2. connecting block; 3. heater body; 4. threaded hole; 5. bolt; 6. mounting groove; 7. connecting hole; 8. connecting column; 9. spring; 10. first fixing plate; 11. connecting groove; 12. threaded rod; 13. second fixing plate; 14. main heater foot plate; 15. cap head. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The embodiments of this application disclose Figure 1-4 A carbon-coated reinforced graphite foot plate for producing single crystals by a Czochralski method is shown, comprising a graphite foot plate 1 and a heater body 3, wherein two connecting blocks 2 are arranged at the bottom of the heater body 3, and a connecting mechanism is arranged at the bottom of the two connecting blocks 2;

[0026] The connecting mechanism includes a plurality of threaded holes 4 provided on the surface of the graphite foot plate 1, the cross section of the graphite foot plate 1 is set to be L-shaped, bolts 5 are provided inside the plurality of threaded holes 4, a mounting groove 6 is provided on the surface of the graphite foot plate 1, the inside of the mounting groove 6 is movably engaged with the bottom of the connecting block 2, a connecting hole 7 is provided at the bottom of the graphite foot plate 1, a connecting column 8 is provided inside the connecting hole 7, a carbon-carbon material layer is provided on the outer wall of the graphite foot plate 1, the surface of the graphite foot plate 1 is first wrapped with the carbon-carbon material layer, so as to improve the strength of the graphite foot plate 1 itself, and the wrapped graphite foot plate 1 can reduce the deformation of the foot plate, and also enhance the load-bearing capacity of the foot plate, and is not easy to break.

[0027] Reference Figure 4As shown, a spring 9 is provided inside the connecting hole 7, a first fixing plate 10 is provided on one side of the spring 9, a connecting groove 11 is provided on the surface of the graphite foot plate 1, a threaded rod 12 is provided inside the connecting groove 11, and a second fixing plate 13 is provided on one side of the threaded rod 12. The bolt 5 is rotated clockwise to turn the bolt 5 into the threaded hole 4, thereby fixing the graphite foot plate 1 and the connecting block 2. Then, the connecting column 8 is inserted into the connecting groove 11, and then the threaded rod 12 is driven to rotate by rotating the cap head 15. Then, the threaded rod 12 drives the second fixing plate 13 to move to the left, and then the connecting column 8 is squeezed. The connecting column 8 squeezes the first fixing plate 10, and the first fixing plate 10 squeezes the spring 9 to deform, and the connecting column 8 moves horizontally in the movable groove, thereby improving the application range of the device.

[0028] Reference Figure 2-3 As shown, the surfaces of the first fixing plate 10 and the second fixing plate 13 are both arranged in an arc shape, and a main heater foot plate 14 is arranged at the bottom of the graphite foot plate 1, and a movable groove is opened on the surface of the main heater foot plate 14. Due to the shape design of the connecting hole 7, the spacing of the main heater foot plates 14 will not be affected by the heater body 3 when adjusting, thereby reducing the damage rate of the heater body 3 and the main heater foot plates 14 caused by deformation, extending the service life, and reducing the use cost of graphite parts.

[0029] Reference Figure 4 As shown, the connecting column 8 is slidably connected to the movable groove, and one end of the threaded rod 12 located outside the connecting hole 7 is fixedly connected with a cap head 15 to facilitate the rotation of the threaded column.

[0030] Working principle of the utility model: when the utility model is used, the surface of the graphite foot plate 1 is first wrapped with a carbon-carbon material layer, so as to improve the strength of the graphite foot plate 1 itself, and the wrapped graphite foot plate 1 can reduce the deformation of the foot plate, and also enhance the load-bearing capacity of the foot plate, and is not easy to break. When installing, first align the installation groove 6 with the bottom of the connecting block 2, then align the bolt 5 with the threaded hole 4, and then rotate the bolt 5 clockwise to turn the bolt 5 into the threaded hole 4, so as to fix the graphite foot plate 1 and the connecting block 2, and then insert the connecting column 8 into the connecting groove 11, and then drive the threaded rod 12 to rotate by rotating the cap head 15, and then the threaded rod 12 drives the second fixing plate 13 to move to the left, and then squeeze the connecting column 8, the connecting column 8 squeezes the first fixing plate 10, and the first fixing plate 10 squeezes the spring 9 to deform, and the connecting column 8 will move horizontally in the movable groove, thereby improving the application range of the device;

[0031] When the heater body 3 changes due to heat, it will drive the main heater foot 14 to move, and the distance between the main heater foot 14 will change with the heat. When the distance between the main heater foot 14 is adjusted, due to the shape design of the connecting hole 7, the distance between the main heater foot 14 will not be affected by the heater body 3 when adjusting, thereby reducing the damage rate of the heater body 3 and the main heater foot 14 due to deformation, extending the service life, and reducing the use cost of graphite parts. At the same time, when the main heater foot 14 is deformed, it will drive the first fixed plate 10 to move horizontally. At this time, because the first fixed plate 10 receives the return force, it drives the driving spring 9 to move, and the first fixed plate 10 and the second fixed plate 13 will always be in contact with the connecting column 8, avoiding the main heater foot 14 and the graphite foot 1 from shaking, thereby greatly improving the stability of the device.

[0032] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A carbon-coated reinforced graphite foot plate for producing single crystals by a Czochralski method, comprising a graphite foot plate (1) and a heater body (3), characterized in that: Two connecting blocks (2) are arranged at the bottom of the heater body (3), and connecting mechanisms are arranged at the bottoms of the two connecting blocks (2); The connection mechanism comprises a plurality of threaded holes (4) provided on the surface of a graphite foot plate (1); the cross section of the graphite foot plate (1) is arranged in an L shape; bolts (5) are arranged inside the plurality of threaded holes (4); a mounting groove (6) is provided on the surface of the graphite foot plate (1); the interior of the mounting groove (6) is movably engaged with the bottom of the connection block (2); a connection hole (7) is provided at the bottom of the graphite foot plate (1); a connection column (8) is arranged inside the connection hole (7); and a carbon-carbon material layer is provided on the outer wall of the graphite foot plate (1).

2. According to claim 1, a carbon-carbon-coated reinforced graphite foot plate for producing single crystals by the Czochralski method is characterized in that: A spring (9) is arranged inside the connection hole (7), and a first fixing plate (10) is arranged on one side of the spring (9).

3. According to claim 1, a carbon-carbon coated reinforced graphite foot plate for producing single crystals by Czochralski method, characterized in that: A connection groove (11) is provided on the surface of the graphite foot plate (1), a threaded rod (12) is provided inside the connection groove (11), and a second fixing plate (13) is provided on one side of the threaded rod (12).

4. The carbon-carbon coated reinforced graphite foot plate for producing single crystals by the Czochralski method according to claim 2, characterized in that: The surfaces of the first fixing plate (10) and the second fixing plate (13) are both arranged to be arc-shaped.

5. The carbon-carbon coated reinforced graphite foot plate for producing single crystal by Czochralski method according to claim 1, characterized in that: A main heater foot plate (14) is provided at the bottom of the graphite foot plate (1), and a movable groove is provided on the surface of the main heater foot plate (14).

6. The carbon-carbon coated reinforced graphite foot plate for producing single crystals by the Czochralski method according to claim 3, characterized in that: The connecting column (8) is slidably connected to the movable groove, and a cap head (15) is fixedly connected to one end of the threaded rod (12) located outside the connecting hole (7).

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