Connecting structure of polycrystalline silicon core and graphite base

By setting a matching connection structure between the clamping groove and the clamping block between the silicon core and the graphite base, the problem of unstable connection between the silicon core and the graphite base is solved, and a stable connection is achieved, which improves the efficiency and safety of polysilicon production.

CN223201612UActive Publication Date: 2025-08-08INNER MONGOLIA TONGWEI SILICON ENERGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421543372.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-02
Publication Date
2025-08-08
Estimated Expiration
2034-07-02

AI Technical Summary

Technical Problem

In the prior art, the connection between the silicon core and the graphite base is unstable, which can easily cause the silicon core to shake, slide out or disengage, affect the efficiency and safety of polysilicon production, and may cause safety accidents.

Method used

The connection structure between the polycrystalline silicon silicon core and the graphite base is adopted. By setting an indented jamming groove on the connection part of the silicon core, an embedded part and a jamming block are arranged on the base body to achieve matching connection between the jamming block and the jamming groove, ensuring the stable connection between the silicon core and the base.

Benefits of technology

The stable connection between the silicon core and the graphite base is achieved, the risk of silicon core inverter furnace is reduced, the efficiency and safety of polysilicon production is improved, and production interruptions and equipment damage is avoided.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223201612U_ABST
    Figure CN223201612U_ABST
Patent Text Reader

Abstract

The utility model provides a connecting structure of a polycrystalline silicon core and a graphite base, and aims to solve the technical problems of the connecting structure of the polycrystalline silicon core and the graphite base. The connecting structure comprises a silicon core main body, one end of the silicon core main body is provided with a frustum-shaped connecting part, and the periphery of the connecting part is provided with a plurality of concave clamping grooves; the end face of one end of the base body is provided with an embedded part extending towards the interior of the end face and can be matched with the connecting part, the inner wall of the embedded part is provided with a plurality of protruding clamping blocks, the clamping blocks can be matched in the clamping grooves, and all the clamping blocks correspond to all the clamping grooves in a one-to-one mode. The connecting part on the silicon core main body can be just embedded in the embedded part on the base main body, and the concave clamping groove is formed in the connecting part, so that when the connecting part of the silicon core main body is inserted into the embedded part of the base main body, the convex clamping block on the embedded part can be embedded in the clamping groove, and the silicon core main body can be inserted into the base main body through the combination of the clamping block and the clamping groove. And stable connection between the silicon core main body and the base main body is realized.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of polysilicon production, in particular to a connection structure between a polysilicon core and a graphite base. Background Art

[0002] Silicon cores are a key raw material for polysilicon production. Their installation and reaction process in the reduction furnace play a decisive role in the quality of the final polysilicon product. In particular, the quality of the connection between the silicon core cone and the graphite base is directly related to the stability of silicon core growth and the quality of the silicon product.

[0003] The silicon cores we use are approximately three meters long. These cores are precisely installed in the reduction furnace, where they play a crucial role as seed material for growth. They play an important supporting role throughout the entire process, facilitating the smooth growth of finished single crystal ingots.

[0004] The lower end of the silicon core needs to be installed in combination with the graphite base, and a stable and seamless combination is required to meet the requirements for qualified installation.

[0005] Current situation analysis:

[0006] The silicon core currently used in reduction furnaces is a circular cone structure that fits on a graphite base. However, in actual operation, there are several major problems:

[0007] 1. The cone is not polished smoothly and does not meet the required taper, resulting in a poor fit with the graphite base. This can easily cause sparks during silicon core growth, affecting normal silicon core growth and reducing the quality and yield of silicon products.

[0008] 2. If the silicon core is not firmly attached to the graphite base and is unstable, the risk of core failure is greatly increased. This not only interrupts the production process, resulting in a waste of time and resources, but can also damage the equipment, further affecting the efficiency and cost of the entire polysilicon production process.

[0009] 3. The silicon core is not securely connected to the graphite base and is prone to slipping or detaching. This problem can directly interrupt the growth of the silicon core, affect product quality, and may even cause safety accidents. Utility Model Content

[0010] In response to the technical problems existing in the connection structure between the silicon core and the graphite base, the utility model provides a connection structure between a polysilicon core and a graphite base, which has the advantage of stably connecting the silicon core and the graphite base.

[0011] The technical solution of the utility model is:

[0012] A connection structure between a polysilicon core and a graphite base, comprising:

[0013] The silicon core body has a frustum-shaped connecting portion at one end, and the outer periphery of the connecting portion has a plurality of inwardly concave snap-in grooves;

[0014] The base body has an embedded portion extending inward on one end face, the embedded portion is frustum-shaped and can be adapted to the connecting portion, and the inner wall of the embedded portion has a plurality of raised snap-fit blocks, the snap-fit blocks can be adapted to the snap-fit grooves, and all the snap-fit blocks correspond to all the snap-fit grooves one by one.

[0015] Optionally, the connecting portion is a truncated cone-shaped structure, and the embedded portion is adapted to the structure of the connecting portion;

[0016] The diameter of the embedded portion at one end of the base body is larger than the diameter of the end thereof located inside the base body.

[0017] Optionally, the clamping groove is a linear structure and is arranged along the waistline direction of the connecting portion, and a plurality of protruding structures are provided on both sides of the clamping groove;

[0018] The clamping block is a long strip-shaped protrusion and can be embedded in the clamping groove. Both sides of the clamping block are provided with a plurality of grooves, and the grooves match the protrusion structure.

[0019] Optionally, the clamping groove is an L-shaped structure, one end of the clamping groove extends in the vertical direction, and the other end extends along the outer wall of the connecting portion with the axis of the connecting portion as the rotation axis, and this end of the clamping groove is close to the end of the connecting portion with a larger diameter;

[0020] The clamping block is an arc-shaped plate, the axis of rotation of which is colinear with the axis of the embedded portion, and can be placed in one end of the clamping groove extending along the outer wall of the connecting portion.

[0021] Optionally, the width of one end of the clamping groove extending in the vertical direction is equal to the length of the clamping block;

[0022] The thickness of one end of the clamping groove extending along the outer wall of the connecting portion is equal to the thickness of the clamping block.

[0023] Optionally, the clamping block is close to the bottom of the embedded portion and is arranged in an inclined shape;

[0024] The clamping groove is in a spiral structure on the connecting portion, and one end of the clamping groove is located on the end of the connecting portion with a smaller diameter.

[0025] Optionally, a positioning area extending along the circumference of the connecting portion is provided at one end of the clamping groove located in the middle of the connecting portion.

[0026] Optionally, the opening of the snap-fitting slot at one end of the connecting portion is wider than the width of the middle portion.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] The connecting part on the silicon core body can be embedded in the embedded part on the base body. By providing an inward-concave snap-in groove on the connecting part, when the connecting part of the silicon core body is inserted into the embedded part of the base body, the protruding snap-in block on the embedded part can be embedded in the snap-in groove, thereby achieving a stable connection between the silicon core body and the base body through the combination of the snap-in block and the snap-in groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a schematic diagram of the three-dimensional structure after the silicon core body and the base body are connected;

[0031] Figure 2 Schematic diagram of the structure of the silicon core body in Example 1;

[0032] Figure 3 This is a schematic structural diagram of the base body in Example 1;

[0033] Figure 4 Schematic diagram of the structure of the silicon core body in Example 2;

[0034] Figure 5 This is a schematic structural diagram of the base body in Example 2;

[0035] Figure 6 Schematic diagram of the structure of the silicon core body in Example 3;

[0036] Figure 7 This is a structural diagram of the base body in Example 3. DETAILED DESCRIPTION

[0037] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0039] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0040] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. Example 1

[0041] See also Figure 1-Figure 3 A connection structure between a polycrystalline silicon core and a graphite base includes a silicon core body 1 and a base body 2. The silicon core body 1 is long and has a connecting portion 3 at one end. The connecting portion 3 is a frustum-shaped structure and has a plurality of snap-in grooves 4 on the outer periphery of the connecting portion 3. The snap-in grooves 4 are concave in the connecting portion 3 and are evenly distributed on the connecting portion 3.

[0042] One end surface of the base body 2 includes an inset portion 5, which extends into the interior of the base body 2 and forms a spatial structure. The inset portion 5 corresponds to the mounting connection portion 3, forming a frustum-shaped structure that allows the connection portion 3 to fit within the inset portion 5. The inner wall of the inset portion 5 includes a plurality of engaging blocks 6. The number of engaging blocks 6 is equal to the number of engaging slots 4, with each engaging block 6 corresponding to a respective engaging slot 4, ensuring that all engaging blocks 6 can be mounted in a one-to-one correspondence within each engaging slot 4.

[0043] In addition, the connecting portion 3 is a truncated cone structure, and the embedded portion 5 is adapted to the connecting portion 3, so that the diameter of the embedded portion 5 at one end of the base body 2 is larger than the diameter of the end thereof located inside the base body 2, and the diameter of the end of the connecting portion 3 that can be inserted into the embedded portion 5 is smaller than the diameter of the other end thereof.

[0044] Specifically, in this embodiment, the snap-in groove 4 is a linear structure extending along the waistline of the connecting portion 3. The snap-in groove 4 has a number of slightly raised protrusions on both sides. These protrusions slightly reduce the distance between the two side walls of the snap-in groove 4. The snap-in block 6 is a long, strip-shaped protrusion that can be embedded in the snap-in groove 4. The snap-in block 6 has a number of grooves on both sides that match the protrusions. When the snap-in block 6 is embedded in the snap-in groove 4, the slightly raised protrusions can fit into the grooves on the snap-in block 6, thereby maintaining a stable connection between the silicon core body 1 and the base body 2. Example 2

[0045] See also Figure 1 、 Figure 4 and Figure 5 A connection structure between a polycrystalline silicon core and a graphite base includes a silicon core body 1 and a base body 2. The silicon core body 1 is long and has a connecting portion 3 at one end. The connecting portion 3 is a frustum-shaped structure and has a plurality of snap-in grooves 4 on the outer periphery of the connecting portion 3. The snap-in grooves 4 are concave in the connecting portion 3 and are evenly distributed on the connecting portion 3.

[0046] One end surface of the base body 2 includes an inset portion 5, which extends into the interior of the base body 2 and forms a spatial structure. The inset portion 5 corresponds to the mounting connection portion 3, forming a frustum-shaped structure that allows the connection portion 3 to fit within the inset portion 5. The inner wall of the inset portion 5 includes a plurality of engaging blocks 6. The number of engaging blocks 6 is equal to the number of engaging slots 4, with each engaging block 6 corresponding to a respective engaging slot 4, ensuring that all engaging blocks 6 can be mounted in a one-to-one correspondence within each engaging slot 4.

[0047] In addition, the connecting portion 3 is a truncated cone structure, and the embedded portion 5 is adapted to the connecting portion 3, so that the diameter of the embedded portion 5 at one end of the base body 2 is larger than the diameter of the end thereof located inside the base body 2, and the diameter of the end of the connecting portion 3 that can be inserted into the embedded portion 5 is smaller than the diameter of the other end thereof.

[0048] Specifically, in this embodiment, the snap-fit groove 4 is an L-shaped structure, one end of the snap-fit groove 4 extends in the vertical direction, and the other end of the snap-fit groove 4 extends in an arc shape along the outer wall of the connecting part 3 with the axis of the connecting part 3 as the rotation axis, and this end of the snap-fit groove 4 is close to the end of the connecting part 3 with a larger diameter.

[0049] The clamping block is an arc-shaped plate, the plate surface of the clamping block is on a horizontal plane, and the rotation axis of the clamping block is collinear with the axis of the embedded part 5. When the clamping block enters the clamping groove 4, the clamping block can be placed in one end of the clamping groove 4 extending along the outer wall of the connecting part 3.

[0050] In addition, the width of one end of the clamping groove 4 extending in the vertical direction is equal to the length of the clamping block, and the thickness of one end of the clamping groove 4 extending along the outer wall of the connecting portion 3 is equal to the thickness of the clamping block.

[0051] When connecting the silicon core body 1 and the base body 2, each snap-in block 6 is inserted into all the snap-in grooves 4 one by one. When the end of the connecting part 3 contacts the end of the embedded part 5, the silicon core body 1 is rotated to insert the snap-in block 6 into one end of the snap-in groove 4 extending along the outer wall of the connecting part 3. Through this method, a stable connection between the silicon core body 1 and the base body 2 can be achieved. Example 3

[0052] See also Figure 1 、 Figure 4 and Figure 5 A connection structure between a polycrystalline silicon core and a graphite base includes a silicon core body 1 and a base body 2. The silicon core body 1 is long and has a connecting portion 3 at one end. The connecting portion 3 is a frustum-shaped structure and has a plurality of snap-in grooves 4 on the outer periphery of the connecting portion 3. The snap-in grooves 4 are concave in the connecting portion 3 and are evenly distributed on the connecting portion 3.

[0053] One end surface of the base body 2 includes an inset portion 5, which extends into the interior of the base body 2 and forms a spatial structure. The inset portion 5 corresponds to the mounting connection portion 3, forming a frustum-shaped structure that allows the connection portion 3 to fit within the inset portion 5. The inner wall of the inset portion 5 includes a plurality of engaging blocks 6. The number of engaging blocks 6 is equal to the number of engaging slots 4, with each engaging block 6 corresponding to a respective engaging slot 4, ensuring that all engaging blocks 6 can be mounted in a one-to-one correspondence within each engaging slot 4.

[0054] In addition, the connecting portion 3 is a truncated cone structure, and the embedded portion 5 is adapted to the connecting portion 3, so that the diameter of the embedded portion 5 at one end of the base body 2 is larger than the diameter of the end thereof located inside the base body 2, and the diameter of the end of the connecting portion 3 that can be inserted into the embedded portion 5 is smaller than the diameter of the other end thereof.

[0055] Specifically, in this embodiment, the snap-in block is close to the bottom of the embedded portion 5 and is arranged in an inclined shape. At the same time, the number of spiral turns of the snap-in block is less than one-fifth of a turn. The snap-in groove 4 is a spiral structure on the connecting portion 3, and one end of the snap-in groove 4 is located at the end of the connecting portion 3 with a smaller diameter. The spiral pitch of the snap-in block is equal to the spiral pitch of the snap-in groove 4. When the connecting portion 3 of the silicon core body 1 is inserted into the embedded portion 5 of the base body 2, the snap-in block 6 is embedded in the snap-in groove 4 by rotation, thereby achieving a stable connection between the silicon core body 1 and the base body 2.

[0056] Preferably, one end of the snap-in groove 4, located in the middle of the connecting portion 3, is provided with a positioning area extending along the circumference of the connecting portion 3. With this positioning area in place, when the silicon core body 1 is rotated until it stops, the snap-in block is embedded in the positioning area. Because the positioning area is provided along the circumference of the connecting portion 3, simply pulling the silicon core body 1 and the base body 2 away from each other will prevent them from separating. This further enhances the stability of the connection between the silicon core body 1 and the base body 2.

[0057] In addition, in order to facilitate the entry of the clamping block 6 into the clamping groove 4, the opening of the clamping groove 4 at one end of the connecting portion 3 is larger than the width of the middle thereof.

[0058] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A connection structure between a polysilicon core and a graphite base, characterized in that: include: The silicon core body has a frustum-shaped connecting portion at one end, and the outer periphery of the connecting portion has a plurality of inwardly concave snap-in grooves; The base body has an embedded portion extending inwardly therefrom on one end surface thereof, the embedded portion being in a frustum shape and being adapted to fit with the connecting portion, and a plurality of protruding engaging blocks on the inner wall of the embedded portion, the engaging blocks being adapted to fit within the engaging grooves, with all the engaging blocks corresponding to all the engaging grooves one-to-one; The connecting portion is a truncated cone-shaped structure, and the embedded portion is adapted to the structure of the connecting portion; The clamping groove is an L-shaped structure, one end of the clamping groove extends in the vertical direction, and the other end extends along the outer wall of the connecting portion with the axis of the connecting portion as the rotation axis, and this end of the clamping groove is close to the end of the connecting portion with a larger diameter; The clamping block is an arc-shaped plate, the axis of rotation of which is colinear with the axis of the embedded portion, and can be placed in one end of the clamping groove extending along the outer wall of the connecting portion.

2. The connection structure between the polysilicon core and the graphite base according to claim 1, characterized in that: The diameter of the embedded portion at one end of the base body is larger than the diameter of the end thereof located inside the base body.

3. The connection structure between the polysilicon core and the graphite base according to claim 2, characterized in that: The clamping groove is a linear structure and is arranged along the waistline direction of the connecting portion. There are a number of protruding structures on both sides of the clamping groove; The clamping block is a long strip-shaped protrusion and can be embedded in the clamping groove. Both sides of the clamping block are provided with a plurality of grooves, and the grooves match the protrusion structure.

4. The connection structure between the polysilicon core and the graphite base according to claim 2, characterized in that: The width of one end of the clamping groove extending in the vertical direction is equal to the length of the clamping block; The thickness of one end of the clamping groove extending along the outer wall of the connecting portion is equal to the thickness of the clamping block.

5. The connection structure between the polysilicon core and the graphite base according to claim 2, characterized in that: The clamping block is close to the bottom of the embedded portion and is arranged in an inclined shape; The clamping groove is in a spiral structure on the connecting portion, and one end of the clamping groove is located on the end of the connecting portion with a smaller diameter.

6. The connection structure between the polysilicon core and the graphite base according to claim 5, characterized in that: One end of the clamping groove located in the middle of the connecting portion is provided with a positioning area extending along the circumference of the connecting portion.

7. The connection structure between the polysilicon core and the graphite base according to claim 6, characterized in that: The opening of the clamping slot at one end of the connecting portion is larger than the width of the middle portion.