Feeding device and silicon material production device with same

Abstract

The utility model discloses a feeding device and a silicon material production device with the feeding device, and the feeding device comprises a feeding cylinder, a feeding pipe, a feeding pipe and a feeding pipe, the feeding rod is arranged in the feeding channel in a penetrating mode and can move in the axial direction of the feeding cylinder, a bottom bowl for sealing the lower end of the feeding channel is arranged at the bottom of the feeding rod, and the feeding channel is opened when the feeding rod moves downwards along the feeding cylinder; and the buffering mechanism is installed on the peripheral side of the feeding rod and located in the feeding channel, the buffering mechanism synchronously moves along with the feeding rod, a buffering part is constructed on the peripheral side of the buffering mechanism, and the buffering part partially shields the feeding channel in the axial direction of the feeding channel and is suitable for enlarging and reducing the passing area of the feeding channel. The feeding device has the advantages of being high in safety, high in feeding efficiency and the like.

Description

Technical Field

[0001] This utility model relates to the field of monocrystalline silicon production technology, and in particular to a feeding device and a silicon material production device having the same. Background Technology

[0002] In related technologies, during the feeding process, a large amount of silicon material accumulates in the feeding channel, causing material jamming. When the feeding channel is opened too wide, a large amount of silicon material falls into the crucible. This falling material impacts the molten silicon in the crucible, causing significant splashing onto the flow guide tube and water-cooled heatsink, affecting the crystal pulling process. Furthermore, the large amount of silicon falling can also cause silicon to splash onto the outside of the crucible, and in more serious cases, some silicon may fall into the heater, causing arcing and creating a safety hazard. To avoid this excessive splashing, the crucible temperature or the feeding amount must be reduced, but this process prolongs the processing time, resulting in lower feeding efficiency. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a feeding device that has the advantages of high safety and high feeding efficiency.

[0004] Another objective of this invention is to provide a silicon material production apparatus having the aforementioned feeding device.

[0005] A feeding device according to a first aspect of the present invention includes: a feeding cylinder having a feeding channel extending axially; a feeding rod passing through the feeding channel and movable axially along the feeding cylinder, the bottom of the feeding rod having a bottom bowl that closes the lower end of the feeding channel, the feeding rod opening the feeding channel when it moves downward along the feeding cylinder; and a buffer mechanism installed on the outer periphery of the feeding rod and located within the feeding channel, the buffer mechanism moving synchronously with the feeding rod, the outer periphery of the buffer mechanism having a buffer portion that partially blocks the feeding channel along its axial direction and is adapted to expand and reduce the passage area of ​​the feeding channel.

[0006] According to some embodiments of the present invention, the buffer mechanism includes: a buffer fixing ring, which is sleeved and installed on the feeding rod; and a plurality of blades, which are rotatably connected to the radial outer side of the buffer fixing ring, the plurality of blades being arranged at intervals along the outer periphery, the blades forming the buffer portion.

[0007] According to some embodiments of the present invention, the blade is configured as an annular fan shape with an outer arc and an inner arc, and the outer peripheral side of the blade is spaced apart from the inner peripheral surface of the feeding cylinder.

[0008] According to some embodiments of the present invention, the inner peripheral wall of the feeding cylinder is constructed with a first stop corresponding to the position of the blade, and the first stop prevents the blade from flipping upward during the downward movement of the feeding rod.

[0009] According to some embodiments of the present invention, the buffer fixing ring includes: a connecting ring, which is sleeved and installed on the feeding rod, the connecting ring forming a pivot at a position corresponding to the blade, and the blade being rotatably connected to the pivot of the connecting ring; and a support base, which is sleeved and installed on the feeding rod, the support base being connected to the bottom of the connecting ring, and the support base supporting the blade at the bottom of the blade.

[0010] According to some embodiments of the present invention, the inner diameter of the connecting ring is larger than the inner diameter of the support base, and the outer diameter of the connecting ring is equal to the outer diameter of the support base.

[0011] According to some embodiments of the present invention, the support base includes: a retaining ring, which is sleeved and installed on the feeding rod; and a second stop, which is connected to the outer periphery of the retaining ring, and the retaining ring supports the blade at the bottom of the blade.

[0012] According to some embodiments of the present invention, there are multiple buffer mechanisms, and the multiple buffer mechanisms are arranged at intervals along the axial direction of the feeding rod.

[0013] According to some embodiments of the present invention, the buffer portion is located on opposite radial sides of the buffer mechanism, and the buffer portions of different buffer mechanisms are staggered from each other in the circumferential direction.

[0014] The silicon material production apparatus according to a second aspect of the present invention includes a feeding device according to the first aspect of the present invention described above.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the feeding device according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the feeding cylinder and feeding rod of the feeding device according to an embodiment of the present utility model;

[0019] Figure 3 This is another structural schematic diagram of the feeding cylinder and feeding rod of the feeding device according to an embodiment of the present utility model;

[0020] Figure 4 This is a structural schematic diagram of the support base of the feeding device according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the connecting ring and blades of the feeding device according to an embodiment of the present utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the first feed edge of the feeding device according to an embodiment of the present utility model.

[0023] Figure label:

[0024] Feeding device 1, feeding cylinder 100, feeding rod 200, buffer device 300, buffer section 201.

[0025] Feeding channel 101, first retaining edge 102, bottom bowl 301, buffer fixing ring 310, blade 320

[0026] Connecting ring 311, support base 312, retaining ring 3121, second retaining edge 3122. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0030] In the description of this utility model, "multiple" means two or more, and "several" means one or more.

[0031] The feeding device 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0032] like Figures 1-6 As shown, the feeding device 1 according to the first aspect of the present invention includes a feeding cylinder 100, a feeding rod 200 and a buffer device 300.

[0033] The feeding cylinder 100 has a feeding channel 101 extending axially. A feeding rod 200 passes through the feeding channel 101 and is movable along the axial direction of the feeding cylinder 100. The bottom of the feeding rod 200 has a bottom bowl 301 that closes the lower end of the feeding channel 101. When the feeding rod 200 moves downwards along the feeding cylinder 100, it opens the feeding channel 101. A buffer mechanism 300 is installed on the outer periphery of the feeding rod 200 and located within the feeding channel 101. The buffer mechanism 300 moves synchronously with the feeding rod 200. The outer periphery of the buffer mechanism 300 has a buffer portion 201. The buffer portion 201 partially blocks the feeding channel 101 along its axial direction and is adapted to expand or reduce the passage area of ​​the feeding channel 101.

[0034] For example, the lower bowl 301 has a conical structure, and the buffer mechanism 300 is annularly sleeved on the feeding rod 200, with the buffer mechanism 300 adjacent to the lower end of the feeding cylinder 100. Specifically, the feeding device 1 can be a single-crystal silicon feeding device. The buffer device 300 can be made of PTFE material to ensure that the silicon material is not contaminated. The buffer device 300 is connected to the inner wall of the feeding cylinder 100, and the buffer device 300 can be adjusted according to the size of the feeding cylinder 100. When the feeding device 1 starts working, the lower bowl 301 moves downward with the feeding rod 200, opening the feeding channel 101. The silicon material falls into the crucible from the feeding channel 101 through the stop of the buffer device 300.

[0035] According to the feeding device 1 of this utility model embodiment, by constructing a buffer device 300 within the feeding channel 101, the silicon material, during its descent under the influence of gravity, is blocked and buffered by the buffer device 300. This prevents the silicon material from being discharged from the feeding device 1 through the outlet of the feeding channel 101 in a concentrated manner, instead dividing the silicon material within the feeding channel 101 into multiple descent stages. Specifically, a portion of the silicon material passes through the gap between the buffer device 300 and the inner wall of the cylinder 100 and is discharged from the feeding device 1 first. Another portion of the silicon material is blocked and buffered by the buffer device 300 and remains temporarily within the feeding channel 101, preventing a large amount of silicon material from falling into the crucible and thus avoiding blockage of the outlet of the feeding channel 101 due to excessive silicon material. During the feeding process, the operator can add the silicon material to the feeding device 1 as a whole without worrying about blockage of the feeding channel 101, reducing the number of feeding batches and improving feeding efficiency. Furthermore, the silicon material buffered by the buffer mechanism 300 will fall into the crucible in stages, rather than falling into the crucible in large quantities, thereby effectively reducing the large amount of silicon material sputtering and accidental splashing, and improving the safety of the feeding device 1 during use.

[0036] Therefore, the feeding device 1 according to the present invention has the advantages of high safety and high feeding efficiency.

[0037] In some optional embodiments of this utility model, such as Figure 1 As shown, the buffer mechanism 300 includes a buffer fixing ring 310 and multiple blades 320. The buffer fixing ring 310 is sleeved and installed on the feeding rod 200. The blades 320 are rotatably connected to the radial outer side of the buffer fixing ring 310, and the multiple blades 320 are arranged at intervals along the outer periphery, forming a buffer section 201. The blades 320 can be located on the front and rear sides of the buffer fixing ring 310, or on the left and right sides of the buffer fixing ring 310. The area of ​​the blades 320 can be changed according to the cross-sectional area of ​​the feeding cylinder 100 to ensure an appropriate amount of silicon material is fed. When the blades 320 rotate upwards, the silicon material can fall downwards along the blades 320, and the rotation of the blades can dynamically adjust the opening area of ​​the feeding channel 101, thereby controlling the amount of silicon material falling. When the feeding rod 200 moves downwards, the rotation of the blades 320 increases the passage area of ​​the feeding channel 101, allowing the silicon material to fall smoothly into the crucible.

[0038] When the blades 320 in the feeding channel 101 form a buffer section 201 during the flipping process, they can effectively reduce the impact force when the material falls into the crucible, effectively prevent the silicon material from splashing during the feeding process, and reduce safety hazards to operators and environmental pollution.

[0039] In some optional embodiments of this utility model, such as Figure 4 and Figure 5As shown, the blade 320 is constructed in a fan shape with an outer arc and an inner arc, and the outer peripheral side of the blade 320 is spaced apart from the inner peripheral surface of the feeding cylinder 100.

[0040] The annular fan-shaped blades 320 effectively guide the silicon material flowing into the feeding cylinder 100, ensuring its uniform distribution along a predetermined flow path. This reduces material accumulation at the outlet where the bottom bowl is located during feeding, guaranteeing a stable and smooth silicon material descent. Simultaneously, the spaced arrangement of the blades 320 guides and controls the material's descent on opposite radial sides of the feeding channel 101, controlling the descent speed and quantity of the silicon material, thereby improving feeding efficiency.

[0041] In some optional embodiments of this utility model, such as Figure 1 As shown, the inner peripheral wall of the feeding cylinder 100 is constructed with a first stop 102 corresponding to the position of the blade 320. During the downward movement of the feeding rod 200, the first stop 102 prevents the blade 320 from flipping upwards. Wherein, as... Figure 1 and Figure 6 As shown, the first stop 102 is fan-shaped and symmetrically arranged on the inner wall of the feeding cylinder 100. When the blade 320 contacts the first stop 102, it flips upwards, allowing silicon material to fall into the crucible through the space between the blade 320 and the inner wall of the feeding cylinder 100. The first stop 102 effectively supports the flipping motion of the blade 320, ensuring the stability of the entire feeding device 1 during feeding. It also prevents material splashing or uncontrolled flow caused by excessive silicon material, thereby improving operational safety and ensuring the safe and stable operation of the feeding device 1.

[0042] In some optional embodiments of this utility model, such as Figure 1 As shown, the buffer fixing ring 310 includes a connecting ring 311 and a support base 312. The connecting ring 311 is sleeved and installed on the feeding rod 200, and the connecting ring 311 forms a pivot at a position corresponding to the blade 320. The blade 320 is rotatably connected to the pivot of the connecting ring 311. The support base 312 is sleeved and installed on the feeding rod 200, and the support base 312 is connected to the bottom of the connecting ring 311. The support base 312 supports the blade 320 at the bottom of the blade 320.

[0043] The structure of the connecting ring 311 and the support base 312 provides excellent support for the blade 320, ensuring its stability during rotation. The support base 312 supports the bottom of the blade 320, effectively reducing its sway during rotation, ensuring smooth feeding, and preventing silicon spillage and waste. The connecting ring 311 forms a pivot on the feeding rod 200, allowing the blade 320 to rotate flexibly. During feeding, the blade 320 acts as a barrier and guide as the silicon falls, achieving more efficient silicon delivery.

[0044] In some optional embodiments of this utility model, such as Figure 4 and Figure 5 As shown, the inner diameter of the connecting ring 311 is larger than the inner diameter of the support base 312, and the outer diameter of the connecting ring 311 is equal to the outer diameter of the support base 312.

[0045] In other words, the connecting ring 311 is located on the outer periphery of the support base, and the blades 320 are all located radially outside the support base 312. The blades 320 can rotate around the connecting ring 311 as a pivot, thereby guiding the silicon material to fall. There is some space left at the connection between the support base 312 and the blades 320, and the silicon material can also pass through the gap between the blades and the inner wall of the feeding cylinder.

[0046] When silicon material falls into the feeding cylinder 100, ensure that the blades 320 can flip upward to prevent the silicon material from falling outside the crucible and improve the safety and reliability of the feeding device 1.

[0047] In some optional embodiments of this utility model, such as Figure 1 As shown, the support base 312 includes a retaining ring 3121 and a second stop 3122. The retaining ring 3121 is sleeved and installed on the feeding rod 200. The second stop 3122 is connected to the outer periphery of the retaining ring 3121, and the retaining ring 3121 supports the blade 320 at the bottom of the blade 320. The retaining ring 3121 has a ring-shaped structure, and the second stop 3122 has a fan-shaped structure. The second stop 3122 can be located on the left or right sides of the retaining ring 3121, or on the front or rear sides of the retaining ring 3121, and the position of the second stop 3122 corresponds to the position of the blade 320.

[0048] The retaining ring 3121 is fitted onto the feeding rod 200, which allows the second stop 3122 to firmly hold the bottom of the blade 320, preventing the blade 320 from drooping downwards due to gravity. This ensures that the blade 320 remains in a horizontal position until it falls to the first stop 102, thus ensuring that the blade 320 is supported by the first stop 102 in the correct position and guaranteeing the reliability of the buffer device 300.

[0049] The second stop 3122 is connected to the outer periphery of the retaining ring 3121, which can effectively prevent the silicon material from splashing or overflowing during the feeding process. When the blade 320 flips or moves, the boundary formed by the second stop 3122 can catch the excess silicon material, ensuring that the silicon material can be accurately guided to the target position and reducing waste.

[0050] In some optional embodiments of this invention, there are multiple buffer mechanisms 300, which are arranged at intervals along the axial direction of the feeding rod 200. The interval arrangement of the buffer mechanisms 300 forms multiple spaced support surfaces, maintaining the stability of the feeding rod 200. During the silicon material falling process, each buffer mechanism 300 can work together to ensure the smooth operation of the entire feeding device 1.

[0051] In some optional embodiments of this utility model, such as Figure 1 As shown, the buffer section 201 is located on opposite radial sides of the buffer mechanism 300, and the buffer sections of different buffer mechanisms 300 are staggered from each other in the circumferential direction.

[0052] The structure of the buffer section 201 on opposite radial sides makes the pressure more evenly distributed throughout the feeding device 1. When the silicon material passes through the feeding device 1, the force acting on the buffer mechanism 300 will not be concentrated at a specific point. The blades 320 of multiple buffer mechanisms 300 can disperse the silicon material to different circumferential positions. The silicon material at different positions can be buffered during its descent, and will not accumulate in local areas, making the silicon material feeding process smoother.

[0053] The silicon material production apparatus of this utility model is described below.

[0054] The silicon material production apparatus according to an embodiment of the present invention includes the feeding device 1 of the above embodiment of the present invention.

[0055] The silicon material production apparatus according to the embodiments of the present invention has the advantages of high safety and high feeding efficiency by utilizing the feeding device 1 of the above embodiments of the present invention.

[0056] Other components and operations of the feeding device 1 and silicon material production device according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0058] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A feeding device, characterized in that, include: A feeding cylinder having a feeding channel extending axially; A feeding rod is inserted through the feeding channel and is movable along the axial direction of the feeding cylinder. The bottom of the feeding rod is constructed with a bottom bowl that closes the lower end of the feeding channel. When the feeding rod moves downward along the feeding cylinder, it opens the feeding channel. A buffer mechanism is installed on the outer periphery of the feeding rod and located within the feeding channel. The buffer mechanism moves synchronously with the feeding rod. A buffer portion is constructed on the outer periphery of the buffer mechanism. The buffer portion partially blocks the feeding channel along the axial direction of the feeding channel and is adapted to expand and reduce the passage area of ​​the feeding channel.

2. The feeding device according to claim 1, characterized in that, The buffer mechanism includes: A buffer fixing ring is sleeved and installed on the feeding rod; Multiple blades are rotatably connected to the radially outer side of the buffer fixing ring, and the multiple blades are arranged at intervals along the outer peripheral side to form the buffer portion.

3. The feeding device according to claim 2, characterized in that, The blade is constructed in a ring-shaped configuration with an outer arc and an inner arc, and the outer peripheral side of the blade is spaced apart from the inner peripheral surface of the feeding cylinder.

4. The feeding device according to claim 2, characterized in that, The inner peripheral wall of the feeding cylinder is constructed with a first stop corresponding to the position of the blade. During the downward movement of the feeding rod, the first stop prevents the blade from flipping upward.

5. The feeding device according to claim 2, characterized in that, The buffer fixing ring includes: A connecting ring is sleeved and installed on the feeding rod. The connecting ring forms a pivot at a position corresponding to the blade. The blade is rotatably connected to the pivot of the connecting ring. A support base is sleeved and installed on the feeding rod. The support base is connected to the bottom of the connecting ring and supports the blade at the bottom of the blade.

6. The feeding device according to claim 5, characterized in that, The inner diameter of the connecting ring is larger than the inner diameter of the support base, and the outer diameter of the connecting ring is equal to the outer diameter of the support base.

7. The feeding device according to claim 5, characterized in that, The support base includes: A retaining ring, which is sleeved and installed on the feeding rod; The second stop edge is connected to the outer periphery of the retaining ring, and the retaining ring supports the blade at the bottom of the blade.

8. The feeding device according to claim 1, characterized in that, There are multiple buffer mechanisms, and the multiple buffer mechanisms are arranged at intervals along the axial direction of the feeding rod.

9. The feeding device according to claim 8, characterized in that, The buffer portions are located on opposite radial sides of the buffer mechanism, and the buffer portions of different buffer mechanisms are staggered from each other circumferentially.

10. A silicon material production apparatus, characterized in that, include: The feeding device according to any one of claims 1-9.

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