Bullet for graphite seat
By dividing the bullet into upper and lower parts and adopting a cylindrical and frustum structure design, the problem of existing bullets being scrapped due to their thin walls is solved, realizing the reuse of resources and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-03-06
AI Technical Summary
The commonly used bullet-shaped silicon ingots are one-piece designs with thin walls. When dismantling the furnace, the silicon rods break, rendering the bullet-shaped ingots unusable, resulting in resource waste and increased costs.
The bullet is designed with an upper and a lower body, which are fixed by a protrusion engaging with the first groove. When dismantling the furnace, only the upper body is destroyed, while the lower body can be reused. The use of a column and a frustum structure enhances the fixation and stability.
This avoids wasting resources, reduces costs, and improves the fixation and stability of the bullet head through the column and frustum structure.
Smart Images
Figure CN223973880U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polycrystalline silicon production technology, and in particular to a bullet head for a graphite base. Background Technology
[0002] With the transformation of industry towards automation and intelligence, and the rapid development of the polysilicon industry, reducing production costs has become one of the main competitive advantages for enterprises. Graphite bases are structural components required in the reduction process during polysilicon production, and are typically used in conjunction with bullet-shaped ingots.
[0003] During reduction furnace loading, the bullet-shaped ingot and graphite base work together to fix the silicon core. After the silicon core is broken down by high voltage, material is introduced, allowing the silicon core to act as a heating element for polycrystalline silicon growth. During operation, the silicon material adheres to the bullet-shaped ingot, further stabilizing the silicon rod and preventing furnace collapse. Both the bullet-shaped ingot and the graphite base are consumables. With advancements in technology, graphite bases can be recycled after being removed from the furnace through machining. However, the commonly used bullet-shaped ingots are currently one-piece ingots used to fix the lower cone of the silicon core. The bullet-shaped ingot has a relatively thin wall thickness, and when the silicon rod breaks during furnace dismantling, the bullet-shaped ingot is damaged and scrapped, resulting in resource waste and increased costs. Utility Model Content
[0004] The purpose of this utility model is to provide a bullet head for a graphite base, in order to solve the problem mentioned in the background art that the existing commonly used bullet heads are one-piece bullet heads used to fix the lower cone of the silicon core. The bullet head wall thickness is relatively thin, and the silicon rod breaks during furnace dismantling, resulting in the bullet head being damaged and the entire bullet head being scrapped, causing resource waste and increasing costs.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] A type of bullet with a graphite base, comprising an upper body and a lower body;
[0007] The upper projectile consists of a frustum, an upper cylinder, and a protrusion from top to bottom. The frustum, upper cylinder, and protrusion are an integral structure, and their axial centers coincide.
[0008] The lower projectile consists of a lower column and an inverted frustum from top to bottom. The lower column and the inverted frustum are an integral structure, and their axial centers coincide.
[0009] The lower projectile has a first groove adapted to the protrusion along the axial direction from the top of the lower column, and the first groove coincides with the axial center of the lower column.
[0010] The upper projectile has a second groove formed along the axial direction from the top of the frustum;
[0011] Both the first groove and the second groove coincide with the axial center of the protrusion.
[0012] Preferably, the diameter of the upper column is larger than the diameter of the lower column.
[0013] Preferably, the diameter of the upper column is 43 cm and the diameter of the lower column is 40 cm.
[0014] Preferably, the top diameter of the frustum is 23.1~23.3 cm and the bottom diameter is 43 cm; the top diameter of the inverted frustum is 40 cm and the bottom diameter is 28.91 cm.
[0015] Preferably, the protrusion is in the shape of an inverted frustum, with a top diameter of 25-25.1 cm and a bottom diameter of 22-22.1 cm; the first groove is in the shape of a frustum, with a top diameter of 24.86-24.96 cm and a bottom diameter of 21.9-22 cm.
[0016] Preferably, the overall height of the frustum and the upper column is lower than the overall height of the inverted frustum and the lower column.
[0017] Preferably, the height of the frustum is 25 cm, the height of the upper column and the lower column are both 10 cm, and the height of the inverted frustum is 35 cm.
[0018] Preferably, the height of the protrusion is higher than the height of the first groove.
[0019] Preferably, the height of the protrusion is 15 cm and the height of the first groove is 14.8 cm.
[0020] Preferably, the second groove is frustum-shaped, with a top diameter of 16.8~16.85 cm, a bottom diameter of 15.25~15.3 cm, and a height of 36 cm.
[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: the bullet head is divided into an upper bullet body and a lower bullet body, and the upper bullet body and the lower bullet body are fixed by a protrusion engaging with the first groove; in use, the bullet head is fixed in the graphite seat, and the silicon core lower cone is fixed in the second groove of the upper bullet body. When the silicon rod breaks during furnace dismantling, only the upper bullet body will be damaged, and only the upper bullet body needs to be replaced, while the lower bullet body can be reused, avoiding resource waste and reducing costs; in order to avoid stress concentration and improve the overall strength of the bullet head, both the upper bullet body and the lower bullet body are designed as a combination of column and frustum structure, which achieves better fixation. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0024] Figure 2 This is a schematic diagram illustrating the use of the bullet head according to an embodiment of this utility model;
[0025] Figure 3 This is a top view of the projectile in an embodiment of the present invention.
[0026] Figure label:
[0027] 10. Upper projectile; 101. Frustum; 102. Upper cylinder; 103. Protrusion; 104. Second groove;
[0028] 20. Lower projectile body; 201. Lower column; 202. Inverted frustum; 203. First groove;
[0029] 30. Graphite base;
[0030] 40. Silicon core. Detailed Implementation
[0031] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.
[0032] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "top", "bottom", "axial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify 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.
[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0034] In this utility model, unless otherwise explicitly specified and limited, the term "fixed" and other such terms should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0035] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.
[0036] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0037] like Figures 1-3 As shown, this utility model embodiment provides a bullet head for a graphite base, including an upper projectile body 10 and a lower projectile body 20;
[0038] The upper projectile 10 includes, from top to bottom, a frustum 101, an upper cylinder 102, and a protrusion 103. The frustum 101, the upper cylinder 102, and the protrusion 103 are an integral structure, and the axial centers of the frustum 101, the upper cylinder 102, and the protrusion 103 coincide.
[0039] The lower projectile 20 includes a lower column 201 and an inverted frustum 202 from top to bottom. The lower column 201 and the inverted frustum 202 are an integral structure, and the axial centers of the lower column 201 and the inverted frustum 202 coincide.
[0040] The lower projectile 20 has a first groove 203 adapted to the protrusion 103, which is formed along the axial direction from the top of the lower column 201. The first groove 203 coincides with the axial center of the lower column 201.
[0041] The upper projectile 10 has a second groove 104 formed along the axial direction from the top of the frustum 101;
[0042] The first groove 203 and the second groove 104 both coincide with the axial center of the protrusion 103.
[0043] The bullet head is divided into an upper bullet body 10 and a lower bullet body 20. The upper bullet body 10 and the lower bullet body 20 are fixed by a protrusion 103 engaging with the first groove 203. In use, the bullet head is fixed in the graphite seat 30, and the lower cone of the silicon core 40 is fixed in the second groove 104. When the silicon rod is dismantled, it will break, which will only damage the upper bullet body 10. Only the upper bullet body 10 needs to be replaced, while the lower bullet body 20 can be reused, avoiding resource waste and reducing costs. The frustum 101 of the upper bullet body 10 can increase the contact area with the external air, making the bullet head more securely fixed to the silicon core 40. The inverted frustum 202 of the lower bullet body 20 can increase the contact area with the graphite seat 30, avoiding stress concentration and making the bullet head stable in the graphite seat 30.
[0044] Because bullets are expensive, their size needs to be controlled while ensuring their functionality.
[0045] During operation, the bullet head will be affected by high temperature, which will cause silicon to form on the bullet head. In order to make the silicon form on the upper part of the bullet head, the diameter of the upper column 102 needs to be larger than the diameter of the lower column 201.
[0046] Specifically, the upper column 102 has a diameter of 43 centimeters, and the lower column 201 has a diameter of 40 centimeters.
[0047] Furthermore, the top diameter of the frustum 101 is 23.1~23.3 cm, and the bottom diameter is 43 cm; the top diameter of the inverted frustum 202 is 40 cm, and the bottom diameter is 28.91 cm; the bottom diameter of the frustum 101 is the same as the diameter of the upper column 102, and the top diameter of the inverted frustum 202 is the same as the diameter of the lower column 201, which avoids stress concentration while ensuring the fixation of the bullet head.
[0048] To ensure a sufficiently secure engagement between the upper projectile 10 and the lower projectile 20, the protrusion 103 is an inverted frustum shape with a top diameter of 25-25.1 cm and a bottom diameter of 22-22.1 cm; the first groove 203 is a frustum shape with a top diameter of 24.86-24.96 cm and a bottom diameter of 21.9-22 cm. This allows for the most stable engagement structure based on the dimensions of the upper projectile 10 and the lower projectile 20.
[0049] Because the segmented bullet design, with its higher top and shorter bottom, can lead to instability and tipping, the overall height of the frustum 101 and the upper column 102 is lower than the overall height of the inverted frustum 202 and the lower column 201.
[0050] Specifically, the height of the frustum 101 is 25 cm, the height of the upper column 102 and the lower column 201 is 10 cm, and the height of the inverted frustum 202 is 35 cm. This ensures that the bullet head is stable on the graphite base 30 and that the silicon core 40 is fixed.
[0051] To ensure the stability between the upper projectile 10 and the lower projectile 20, and to facilitate the removal of the upper projectile 10, the height of the protrusion 103 is higher than the height of the first groove 203.
[0052] Specifically, the height of the protrusion 103 is 15 cm and the height of the first groove 203 is 14.8 cm. In this embodiment, after the protrusion 103 and the first groove 203 are engaged, a gap will be left between the upper column 102 and the lower column 201 to facilitate the removal of the upper elastic body 10.
[0053] To ensure that the conical part of the silicon core 40 can be firmly secured within the second groove 104, the second groove 104 is frustum-shaped with a top diameter of 16.8~16.85 cm, a bottom diameter of 15.25~15.3 cm, and a height of 36 cm, thereby achieving a secure locking structure based on the dimensions of the upper spring body 10.
[0054] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.
Claims
1. A bullet head for graphite seat, comprising an upper bullet body (10) and a lower bullet body (20), characterized in that: the upper bullet body (10) comprises a circular truncated cone (101), an upper column (102) and a protrusion (103) from top to bottom in sequence, the circular truncated cone (101), the upper column (102) and the protrusion (103) are of an integral structure, and the axial centers of the circular truncated cone (101), the upper column (102) and the protrusion (103) coincide; the lower bullet body (20) comprises a lower column (201) and an inverted circular truncated cone (202) from top to bottom in sequence, the lower column (201) and the inverted circular truncated cone (202) are of an integral structure, and the axial centers of the lower column (201) and the inverted circular truncated cone (202) coincide; wherein the first groove (203) compatible with the protrusion (103) is formed in the axial direction on the top of the lower column (201) of the lower bullet body (20), and the first groove (203) coincides with the axial center of the lower column (201); the second groove (104) is formed in the axial direction on the top of the circular truncated cone (101) of the upper bullet body (10); the axial center of the first groove (203) and the second groove (104) coincides with the axial center of the protrusion (103). The diameter of the upper column (102) is greater than the diameter of the lower column (201). The diameter of the upper column (102) is 43 cm, and the diameter of the lower column (201) is 40 cm. The top diameter of the circular truncated cone (101) is 23.1-23.3 cm, and the bottom diameter is 43 cm; the top diameter of the inverted circular truncated cone (202) is 40 cm, and the bottom diameter is 28.91 cm. The protrusion (103) is an inverted circular truncated cone, the top diameter is 25-25.1 cm, and the bottom diameter is 22-22.1 cm; the first groove (203) is a circular truncated cone, the top diameter is 24.86-24.96 cm, and the bottom diameter is 21.9-22 cm. The overall height of the circular truncated cone (101) and the upper column (102) is lower than the overall height of the inverted circular truncated cone (202) and the lower column (201).
2. A graphite holder bullet according to claim 1, characterized in that: The height of the circular truncated cone (101) is 25 cm, the height of the upper column (102) and the lower column (201) is 10 cm, and the height of the inverted circular truncated cone (202) is 35 cm.
3. A bullet for a graphite seat according to claim 2, characterized in that: The height of the protrusion (103) is higher than the height of the first groove (203).
4. The graphite holder bullet of claim 3, wherein: The height of the protrusion (103) is 15 cm, and the height of the first groove (203) is 14.8 cm.
5. A bullet for a graphite seat according to claim 4, characterized in that: The second groove (104) is a circular truncated cone, the top diameter is 16.8-16.85 cm, the bottom diameter is 15.25-15.3 cm, and the height is 36 cm.
6. The graphite holder bullet of claim 1, wherein: 7. A bullet for a graphite seat according to claim 6, characterized in that: 8. The graphite seat bullet of claim 1, wherein: 9. A bullet for a graphite seat according to claim 8, characterized in that: 10. A bullet for a graphite seat according to any one of claims 5, 7 and 9, characterized in that: