Clamping piece of silicon core seed crystal

Abstract

The utility model provides a clamping piece of a silicon core seed crystal, and relates to the technical field of silicon core drawing. The clamping piece of the silicon core seed crystal comprises a connecting rope used for being connected with a lifting head at the top end of a silicon core furnace; the connector is connected with the connecting rope; a mounting through hole is formed in the connecting assembly, the connector is connected into the mounting through hole, and the length of the connecting assembly is adjustable; the inner clamp is mounted at one end, far away from the connector, of the mounting through hole, and a seed crystal mounting hole is formed in the middle of the inner clamp; wherein after one end of the seed crystal is connected with the inner clamp, the seed crystal extends out of the connecting assembly through the mounting hole. According to the utility model, the seed crystal is fixed in the inner clamp, and then the inner clamp is arranged in the connecting assembly, so that the seed crystal is fixed more firmly, the yield of finished products can be effectively improved, the length of the connecting assembly can be directly adjusted according to the length requirement of the seed crystal during drawing, and the operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon core drawing, in particular to a clamping piece for a silicon core seed crystal. Background Art

[0002] At present, the silicon cores used in the photovoltaic market are multi-wafer rods produced by the CZ method (direct pulling method). They can be processed into square silicon cores through cutting and annealing methods, and can be drawn using the powder materials (off-grade products) produced by silicon material factories. Then, using the diamond tool cutting method, by using a thin steel wire plated with diamond particles to reciprocate or move unidirectionally at high speed on the workpiece to be processed, the silicon rod is pressed on the square wire mesh composed of diamond wires of the machine tool, so as to cut the silicon rod into slender silicon cores.

[0003] The patent with the publication number of CN220284290U discloses a multi-seed crystal clamping device. This clamping device can realize the simultaneous drawing of multiple silicon cores and improve production efficiency. However, during the drawing process, when it is necessary to adjust the length of the clamping device, it is necessary to replace the second clamping pull rope and the graphite chuck at the same time, making the operation of this clamping device more troublesome. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a clamping piece for a silicon core seed crystal. The seed crystal is fixed in the inner clamp, and then the inner clamp is installed in the connecting component, making the fixation of the seed crystal more firm, effectively improving the yield rate of the finished product. During drawing, the length of the connecting component can be directly adjusted according to the length requirement of the seed crystal, and the operation is more convenient.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A clamping piece for a silicon core seed crystal, comprising:

[0007] A connecting rope for connecting with the lifting head at the top of the silicon core furnace;

[0008] A connecting head connected to the connecting rope;

[0009] A connecting component, provided with an installation through hole on it. The connecting head is connected into the installation through hole, and the length of the connecting component is adjustable;

[0010] An inner clamp installed at one end of the installation through hole away from the connecting head. The middle part of the inner clamp has a seed crystal installation hole;

[0011] Wherein, after one end of the seed crystal is connected to the inner clamp, it extends outside the connecting component through the installation hole.

[0012] Optionally, the connecting rope is a tungsten wire rope or a steel wire rope.

[0013] Optionally, the connector and the connection component are connected by threads.

[0014] Optionally, the connection component includes:

[0015] A connecting piece having a threaded hole at the top for connecting with the connector, and an external thread is provided on the outer side wall of the connecting piece;

[0016] A locking piece, the installation through hole is arranged in the locking piece, and the installation through hole has a connecting part for connecting with the connecting piece and a fixing part for installing the inner card;

[0017] Wherein, when the locking piece rotates forward and backward, its relative position with the connecting piece can be adjusted.

[0018] Optionally, the orthographic projection of the fixing part is in an isosceles trapezoid structure.

[0019] Optionally, the outer side wall of the inner card matches the structure of the fixing part.

[0020] Optionally, the installation hole is a stepped hole.

[0021] Compared with the prior art, the beneficial effects of the present utility model are:

[0022] 1. Fix the seed crystal in the inner card, and then install the inner card in the connection component, making the fixation of the seed crystal more firm and more stable during the pulling process, which can effectively improve the yield of the finished product.

[0023] 2. The connector, the connecting piece and the locking piece are all connected by threads, making the structure of the card relatively simple, and clamping the seed crystal stably during the up and down movement and rotation of the seed crystal. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the card for the silicon core seed crystal.

[0026] Figure 2 It is a schematic diagram of the disassembled structure of the card for the silicon core seed crystal.

[0027] Reference Signs:

[0028] 1. Connecting rope;

[0029] 2. Connector;

[0030] 3. Connecting component; 31. Mounting through-hole; 32. Connecting piece; 33. Threaded hole; 34. Locking piece; 35. Connecting portion; 36. Fixing portion;

[0031] 4. Inner clamp; 41. Seed crystal mounting hole;

[0032] 5. Pulling head. Detailed implementation manners

[0033] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships when the products of the present utility model are usually placed, or the orientation or positional relationships commonly understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0035] In the present utility model, unless otherwise clearly defined and limited, the terms "mount", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0037] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0038] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0039] As Figure 1 and Figure 2 shown, an embodiment of the present utility model provides a clamping member for a silicon core seed crystal, including: a connecting rope 1, a connecting head 2, a connecting component 3, and an inner clamp 4. The connecting rope 1 is used to connect with a lifting head 5 at the top of a silicon core furnace. The connecting head 2 is connected to the connecting rope 1. An installation through hole 31 is provided on the connecting component 3, and the connecting head 2 is connected into the installation through hole 31, and the length of the connecting component 3 is adjustable. The inner clamp 4 is installed at one end of the installation through hole 31 away from the connecting head 2, and a seed crystal installation hole 41 is provided in the middle of the inner clamp 4. After one end of the seed crystal is connected to the inner clamp 4, it extends out of the connecting component 3 through the installation hole.

[0040] When performing seed crystal stretching, first connect the connecting rope 1 with the lifting head 5 at the top of the silicon core furnace, and stretch the seed crystal under the action of the lifting head 5. When preparing for stretching, first fix the seed crystal in the seed crystal installation hole 41 of the inner clamp 4, and then install the inner clamp 4 in the connecting component 3. Connect the connecting component 3 with the connecting head 2 and adjust the length of the connecting component 3. Then start the lifting head 5 to realize the drawing of the seed crystal.

[0041] In one embodiment, the connecting rope 1 is a tungsten wire rope or a steel wire rope. When the connecting rope 1 is a tungsten wire rope, it is because the tungsten wire rope has better strength and can improve the service life of the connecting rope 1 during the drawing and rotation process.

[0042] When the connecting rope 1 is a steel wire rope, it is because the steel wire rope has the advantages of high strength, light self-weight, stable operation, not easily breaking suddenly as a whole, and reliable work.

[0043] In one embodiment, as Figure 1 and Figure 2 shown, in order to facilitate the disassembly and assembly of the connecting component 3, the connecting head 2 and the connecting component 3 are connected by threads.

[0044] In one embodiment, as Figure 1 and Figure 2 shown, the connecting component 3 includes: a connecting piece 32 and a locking piece 34. The top of the connecting piece 32 has a threaded hole 33 connected to the connecting head 2, and an external thread is provided on the outer side wall of the connecting piece 32. The mounting through hole 31 is provided in the locking piece 34. The mounting through hole 31 is provided in the locking piece 34. The mounting through hole 31 has a connecting portion 35 connected to the connecting piece 32 and a fixing portion 36 for mounting the inner clamp 4. When the locking piece 34 rotates forward and backward, its relative position with the connecting piece 32 can be adjusted.

[0045] During use, the connecting head 2 and the connecting piece 32 are connected by threads. Then, the inner clamp 4 with the seed crystal installed is installed in the mounting through hole 31, and then the locking piece 34 is connected to the outer side wall of the connecting piece 32 by threads. During the connection process, the length of the locking piece 34 screwed into the connecting piece 32 is adjusted according to the usage requirements, so that the length of the connecting component 3 is adjustable.

[0046] In one embodiment, as Figure 2 shown, the orthographic projection of the fixing portion 36 is in an isosceles trapezoid structure. The outer side wall of the inner clamp 4 matches the structure of the fixing portion 36. The mounting hole is a stepped hole.

[0047] During use, in order to facilitate the installation of the seed crystal, the inner clamp 4 has a stepped hole, and one end of the seed crystal is stuck at the step of the stepped hole. Then, the inner clamp 4 is installed in the fixing portion 36 of the mounting through hole 31. The fixing portion 36 is in an isosceles trapezoid structure, and the base of the isosceles trapezoid structure is close to the connecting portion 35. One end of the inner clamp 4 has a tapered surface matching the structure of the fixing portion 36. Therefore, during installation, the inner clamp 4 contacts the inclined surface of the fixing portion 36, so that the inner clamp 4 is installed in the mounting through hole 31.

[0048] Steps for pulling the seed crystal:

[0049] As Figure 1 and Figure 2 shown, a tungsten wire rope is connected through the lifting head 5 at the top of the silicon core furnace, and a connecting head 2 is provided at the lower end of the tungsten wire rope. The connecting head 2 is threadedly connected to the connecting piece 32, the seed crystal is fixed in the inner clamp 4, then the inner clamp 4 is installed in the fixing portion 36 of the locking piece 34, and finally the locking piece 34 is connected to the connecting piece 32, and the position after the connection between the connecting piece 32 and the locking piece 34 is adjusted. Under the action of the lifting head 5, the seed crystal is inserted into the liquid surface of the silicon core furnace, and a crystallization interface is formed by using the temperature gradient change. The seed crystal is drawn into a silicon core round rod during the upward lifting process.

[0050] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A silicon core seed crystal clamp, characterized in that: include: A connecting rope, used to connect with the lifting head at the top of the silicon core furnace; A connector, connected to the connecting rope; A connecting component, wherein a mounting through hole is provided on the connecting component, the connecting head is connected to the mounting through hole, and the length of the connecting component is adjustable; An inner card is installed at an end of the installation through hole away from the connector, and a seed crystal installation hole is provided in the middle of the inner card; Among them, after one end of the seed crystal is connected to the inner card, it extends to the outside of the connecting component through the mounting hole.

2. The silicon core seed crystal clamp according to claim 1, characterized in that: The connecting rope is a tungsten wire rope or a steel wire rope.

3. The silicon core seed crystal clamp according to claim 1, characterized in that: The connecting head is connected to the connecting assembly via threads.

4. The silicon core seed crystal clamp according to claim 1, characterized in that: The connection component comprises: A connecting piece, the top of which has a threaded hole connected to the connecting head, and the outer side wall of the connecting piece is provided with an external thread; A locking member, wherein the mounting through hole is arranged in the locking member, and the mounting through hole has a connecting portion connected to the connecting member and a fixing portion for mounting the inner card; Wherein, when the locking member is rotated forwards or reversed, its relative position with the connecting member can be adjusted.

5. The silicon core seed crystal clamp according to claim 4, characterized in that: The orthographic projection of the fixing portion is an isosceles trapezoidal structure.

6. The silicon core seed crystal clamp according to claim 5, characterized in that: The outer side wall of the inner card matches the structure of the fixing portion.

7. The silicon core seed crystal clamp according to claim 1, characterized in that: The mounting hole is a stepped hole.

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