Granular silicon feeding device for monocrystalline silicon production

Abstract

The utility model discloses a granular silicon feeding device for monocrystalline silicon production, which comprises a feeding bin and a feeding bin, a bottom opening of the feeding bin is communicated and connected with the feeding bin through a feeding channel, and a rotating shaft is rotatably connected in the feeding bin. The silicon particle feeding device has the beneficial effects that the first driving motor drives the rotating shaft to rotate and drives the partition plate to rotate, silicon particles meeting the particle size requirement in the feeding bin are uniformly fed into the feeding channel and enter melting equipment, the stability and uniformity of feeding are improved, and meanwhile, the second driving motor drives the driving gear to rotate, so that the feeding efficiency is improved. The heating pipe is powered on to preliminarily preheat particle silicon, so that the later melting speed is increased, the working efficiency is improved, the heating pipe rotates in the feeding bin to stir the particle silicon, the particle silicon is prevented from caking or generating a bridging effect, and the particle silicon is prevented from being molten in the feeding bin. The feeding stability and the preheating uniformity are improved, and the working efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of feeding devices for single crystal furnaces, and more specifically, to a granular silicon feeding device for single crystal silicon production. Background Technology

[0002] Depending on the crystal growth method, the current technologies for preparing single-crystal silicon are mainly divided into two types: the floating zone melting method and the Czochralski method. The Czochralski method has a lower cost and a faster growth rate, making it more suitable for pulling large-size single-crystal silicon rods.

[0003] After searching, it was found that the application number CN202022046574.6, entitled "Feeding Device for Continuous Crystal Pulling Single Crystal Furnace", proposed that in order to realize continuous crystal pulling in a single crystal furnace, a feeding device is generally set on the single crystal furnace. Existing feeding devices generally introduce granular silicon material directly into the crucible through a feed pipe. This makes it impossible to guarantee the presence of large silicon particles in the added silicon material; therefore, it cannot guarantee that the silicon particles will melt quickly after being added to the crucible, and that the temperature of the molten silicon inside the crucible will be maintained; thus affecting the stretching quality of the monocrystalline silicon. By setting a vibrating cylinder below the storage cylinder, the vibration of the vibrating cylinder facilitates the screening of silicon particles on the first and second vibrating screen plates inside the vibrating cylinder, thereby ensuring that the added silicon material is of smaller particle size; ensuring that the silicon material melts quickly after being added to the crucible, while maintaining the continuity of feeding; and ensuring the stretching quality of the monocrystalline silicon ingot. However, after the smaller silicon particles enter the crucible, they still need to be heated from a low temperature to a high temperature to melt, and the heating time is still too long, affecting the stretching speed and the continuity of work. Further improvements can be made. At the same time, the screening of silicon particles can be completed before they are added to the storage cylinder. The vibrating screen in this application not only increases the complexity of the structure, but may also cause instability of the overall structure during structural vibration, affecting the stability of the operation. Further improvements can also be made.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a granular silicon feeding device for monocrystalline silicon production, which has the advantage of improved working efficiency, thereby solving the problems mentioned in the background technology.

[0007] (II) Technical Solution

[0008] To achieve the aforementioned advantages of improved work efficiency, the specific technical solution adopted by this utility model is as follows:

[0009] A granular silicon feeding device for monocrystalline silicon production includes a feeding hopper and a feeding bin. The bottom opening of the feeding hopper is connected to the feeding bin via a feeding channel. A rotating shaft is rotatably connected inside the feeding bin, and a partition is fixedly installed on the surface of the rotating shaft. A first drive motor is fixedly installed on the front face of the feeding bin, and the output end of the first drive motor is fixedly connected to one end of the rotating shaft. A shaft tube is rotatably connected through the top surface of the feeding bin, and an installation tube is fixedly connected through the bottom surface of the shaft tube. A heating tube is fixedly installed on the bottom surface of the installation tube. A second drive motor is fixedly installed on the top surface of the feeding bin, and a drive gear is installed at the output end of the second drive motor. A driven gear is fixedly installed on the outer surface of the top of the shaft tube, and the driven gear meshes with the drive gear. An electric slip ring is rotatably connected to the top of the shaft tube.

[0010] Furthermore, the bottom opening of the feeding hopper is connected to a feeding channel, and an electromagnetic heating coil is sleeved on the outer wall of the feeding channel.

[0011] Furthermore, the heating tubes are arranged in multiple sets, and the length of the heating tubes is arranged according to the outline of the feeding hopper.

[0012] Furthermore, the shaft tube is rotatably connected to the top surface of the feeding bin via a bearing, and the shaft tube and the feeding bin are arranged coaxially.

[0013] Furthermore, a feeding hopper is connected through the top surface of the feeding bin to the other side of the shaft tube.

[0014] Furthermore, multiple sets of the partitions are arranged at equal angles along the rotating axis, and the rotating axis is coaxial with the feeding bin.

[0015] Furthermore, the edge of the partition slides against the inner wall of the feeding bin, and the inner wall of the feeding bin is polished.

[0016] Furthermore, the first drive motor is a servo motor.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a granular silicon feeding device for monocrystalline silicon production, which has the following beneficial effects:

[0019] (1) This utility model uses a first drive motor to drive the rotating shaft to rotate, which in turn drives the partition plate to rotate, so that the granular silicon that meets the particle size requirements in the feeding bin is evenly fed into the feeding channel and enters the melting equipment, which improves the stability and uniformity of feeding. At the same time, the second drive motor drives the drive gear to rotate, which drives the driven gear to rotate, which drives the shaft tube and the mounting tube to rotate, which drives the heating tube to rotate. After the heating tube is powered on, it preheats the granular silicon, thereby accelerating the later melting speed and improving the working efficiency. The heating tube rotates in the feeding bin to stir the granular silicon, preventing it from clumping or producing a bridging effect, which improves the stability of feeding and the uniformity of preheating, and further improves the working efficiency.

[0020] (2) This utility model uses an electromagnetic heating coil. The electromagnetic heating coil is wrapped around the outside of the feeding channel. After being energized, it heats the feeding channel. When the granular silicon flows out of the feeding channel, it is further preheated, which further accelerates the later melting speed and improves the working efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the internal structure of the granular silicon feeding device for monocrystalline silicon production proposed in this utility model;

[0023] Figure 2 This is a front view of the granular silicon feeding device for monocrystalline silicon production proposed in this utility model;

[0024] Figure 3 This is a rear view of the granular silicon feeding device for monocrystalline silicon production proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the installation of the heating tube proposed in this utility model.

[0026] In the picture:

[0027] 1. Feeding bin; 2. First drive motor; 3. Feeding channel; 4. Feeding bin; 5. Rotating shaft; 6. Partition plate; 7. Feeding channel; 8. Electromagnetic heating coil; 9. Shaft tube; 10. Mounting tube; 11. Heating tube; 12. Drive gear; 13. Driven gear; 14. Electric slip ring; 15. Second drive motor; 16. Feeding hopper. Detailed Implementation

[0028] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0029] According to an embodiment of the present invention, a granular silicon feeding device for monocrystalline silicon production is provided.

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, the granular silicon feeding device for monocrystalline silicon production according to an embodiment of the present invention includes a feeding bin 1 and a feeding bin 4. The bottom opening of the feeding bin 1 is connected to the feeding bin 4 through a feeding channel 3. A rotating shaft 5 is rotatably connected inside the feeding bin 4, and a partition plate 6 is fixedly installed on the surface of the rotating shaft 5. A first drive motor 2 is fixedly installed on the front surface of the feeding bin 4, and the output end of the first drive motor 2 is fixedly connected to one end of the rotating shaft 5, which is a common drive structure. A shaft tube 9 is rotatably connected through the top surface of the feeding bin 1. The bottom surface of the shaft tube 9 is fixedly connected to the mounting tube 10, which facilitates wire threading and power supply to the heating tube 11. The heating tube 11 is fixedly mounted on the bottom surface of the mounting tube 10. The top surface of the feeding hopper 1 is fixedly mounted with a second drive motor 15, and a drive gear 12 is mounted on the output end of the second drive motor 15. A driven gear 13 is fixedly mounted on the outer surface of the top of the shaft tube 9, and the driven gear 13 meshes with the drive gear 12. An electric slip ring 1 is rotatably connected to the top of the shaft tube 9. 4. The output end of the electric slip ring 14 is electrically connected to the heating tube 11 via an electrical connection line, and the input end of the electric slip ring 14 is connected to an external power supply. This is a common rotating power supply structure, which facilitates the rotational power supply of the heating tube 11. After screening, the granular silicon is fed into the feeding bin 1. The first drive motor 2 drives the rotating shaft 5 to rotate, which in turn drives the partition plate 6 to rotate, uniformly feeding the granular silicon in the feeding bin 1 that meets the particle size requirements into the feeding channel 7, and into the melting equipment. This improves the stability and uniformity of feeding. At the same time, the second drive motor 15 drives the drive gear 12 to rotate, which in turn drives the driven gear 13 to rotate, which in turn drives the shaft tube 9 and the mounting tube 10 to rotate, and drives the heating tube 11 to rotate. After the heating tube 11 is energized, it preheats the granular silicon, thereby accelerating the subsequent melting speed and improving the working efficiency. The rotation of the heating tube 11 in the feeding bin 1 stirs the granular silicon, preventing it from clumping or producing a bridging effect, improving the stability of feeding and the uniformity of preheating, and further improving the working efficiency.

[0031] In one embodiment, the bottom opening of the feeding hopper 4 is connected to a feeding channel 7, and an electromagnetic heating coil 8 is sleeved on the outer wall of the feeding channel 7. The electromagnetic heating coil 8 is used in conjunction with a driving device and a control device, which are common devices in the art and are not shown in detail in the figure. The electromagnetic heating coil 8 surrounds the outside of the feeding channel 7 and heats the feeding channel 7 after being energized. When the granular silicon flows out of the feeding channel 7, it further preheats the granular silicon, further accelerates the later melting speed, and further improves the working efficiency.

[0032] In one embodiment, multiple sets of heating tubes 11 are arranged, and the length of the heating tubes 11 is arranged according to the outline of the feeding bin 1, thereby improving the uniformity of heating and working efficiency.

[0033] In one embodiment, the shaft tube 9 is rotatably connected to the top surface of the feeding bin 1 via a bearing, and the shaft tube 9 and the feeding bin 1 are arranged coaxially to improve the stability of rotation.

[0034] In one embodiment, the top surface of the feeding bin 1 is connected to the feeding hopper 16 through the shaft tube 9 on the other side, which facilitates the feeding of granular silicon raw materials with the required particle size after screening.

[0035] In one embodiment, multiple sets of partitions 6 are arranged at equal angles along the rotating shaft 5, and the rotating shaft 5 is coaxially arranged with the feeding bin 4 to improve the stability of rotation. The edges of the partitions 6 slide against the inner wall of the feeding bin 4, and the inner wall of the feeding bin 4 is polished to prevent material leakage, reduce wear, and improve the smoothness of operation.

[0036] In one embodiment, the first drive motor 2 is a servo motor, which makes it convenient for operators to control the rotation speed and thus control the feeding speed.

[0037] Working principle:

[0038] The first drive motor 2 drives the rotating shaft 5 to rotate, which in turn drives the partition plate 6 to rotate, uniformly feeding the granular silicon that meets the particle size requirements from the feeding bin 1 into the feeding channel 7, and into the melting equipment. This improves the stability and uniformity of the feeding. At the same time, the second drive motor 15 drives the drive gear 12 to rotate, which in turn drives the driven gear 13 to rotate, which in turn drives the shaft tube 9 and the mounting tube 10 to rotate, and drives the heating tube 11 to rotate. After the heating tube 11 is energized, it preheats the granular silicon, thereby accelerating the subsequent melting speed and improving the working efficiency. The rotation of the heating tube 11 in the feeding bin 1 stirs the granular silicon, preventing it from clumping or bridging, improving the stability of the feeding and the uniformity of preheating, and further improving the working efficiency. Meanwhile, the electromagnetic heating coil 8 is wrapped around the outside of the feeding channel 7. After being energized, it heats the feeding channel 7. When the granular silicon flows out of the feeding channel 7, it is further preheated, further accelerating the subsequent melting speed and further improving the working efficiency.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 granular silicon charging device for single crystal silicon production, characterized by, The device includes a feeding bin (1) and a feeding bin (4). The bottom opening of the feeding bin (1) is connected to the feeding bin (4) through a feeding channel (3). A rotating shaft (5) is rotatably connected inside the feeding bin (4), and a partition plate (6) is fixedly installed on the surface of the rotating shaft (5). A first drive motor (2) is fixedly installed on the front of the feeding bin (4), and the output end of the first drive motor (2) is fixedly connected to one end of the rotating shaft (5). A shaft tube (9) is rotatably connected through the top surface of the feeding bin (1), and the shaft tube... (9) A mounting tube (10) is fixedly connected through the bottom surface, and a heating tube (11) is fixedly installed on the bottom surface of the mounting tube (10). A second drive motor (15) is fixedly installed on the top surface of the feeding bin (1), and a drive gear (12) is installed at the output end of the second drive motor (15). A driven gear (13) is fixedly installed on the outer surface of the top of the shaft tube (9), and the driven gear (13) meshes with the drive gear (12). An electric slip ring (14) is rotatably connected to the top of the shaft tube (9).

2. The granular silicon charging device for single crystal silicon production according to claim 1, characterized by The bottom opening of the feeding bin (4) is connected to the feeding channel (7), and the outer wall of the feeding channel (7) is fitted with an electromagnetic heating coil (8).

3. The granular silicon charging device for single crystal silicon production according to claim 1, characterized by The heating tubes (11) are arranged in multiple sets, and the length of the heating tubes (11) is arranged according to the outline of the feeding bin (1).

4. The granular silicon charging device for single crystal silicon production according to claim 1, characterized by The shaft tube (9) is rotatably connected to the top surface of the feeding bin (1) via a bearing, and the shaft tube (9) and the feeding bin (1) are arranged coaxially.

5. The granular silicon charging device for single crystal silicon production according to claim 1, characterized by The top surface of the feeding bin (1) is connected to the feeding hopper (16) on the other side of the shaft tube (9).

6. The granular silicon charging device for single crystal silicon production according to claim 1, characterized by The partition (6) is arranged in multiple sets at equal angles along the rotating shaft (5), and the rotating shaft (5) is arranged coaxially with the feeding bin (4).

7. The granular silicon feeding device for monocrystalline silicon production according to claim 1, characterized in that, The edge of the partition (6) slides against the inner wall of the feeding bin (4), and the inner wall of the feeding bin (4) is polished.

8. The granular silicon charging device for single crystal silicon production according to claim 1, characterized by The first drive motor (2) is a servo motor.

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