Seed crystal trepanning drill and crystal pulling equipment
By setting up drainage tanks and drainage tanks on the inner and outer blade bodies of the seed crystal nesting drill, the problem of increasing workload of silicon sludge accumulation is solved, and the rapid discharge of silicon sludge and the extension of equipment life is achieved.
Patent Information
- Application Number
- CN202422598688.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-25
AI Technical Summary
During the crystal drawing process, the silicon slurry accumulation generated by the seed crystal nesting drill increases its workload, resulting in damage to the equipment and shortening its service life.
A seed crystal nesting drill is designed, including a shaped shell, a knife head and a drainage tank. The knife head is composed of an outer knife body and an inner knife body. A plurality of drainage tanks are arranged on the inner and outer knife bodies to facilitate the discharge of silicon mud accumulations, and rapid flow diversion is achieved through the drainage tank.
Effectively reduce the resistance of silicon mud accumulation to the cutting head, improve cutting efficiency, and extend the service life of the equipment.
Smart Images
Figure CN223255513U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of crystal pulling technology, and in particular to a seed crystal drill and crystal pulling equipment. Background Art
[0002] During the crystal pulling process, a seed drill is needed to finally extract the optimized seed crystal from the mother rod. However, during the extraction process using the seed drill, silicon mud will accumulate, which will increase the workload of the seed drill and may cause the seed drill to break after long-term use.
[0003] Therefore, there is an urgent need for a seed crystal drill and a crystal pulling device to solve the technical problems existing in the prior art to a certain extent. Utility Model Content
[0004] The purpose of the present application is to provide a seed crystal drill and a crystal pulling device, which can reduce the burden of silicon mud accumulation on the seed crystal drill to a certain extent and increase the service life of the seed crystal drill.
[0005] The present application discloses a seed crystal drilling drill, comprising a forming shell, a cutter head connected to the forming shell, and a drainage groove;
[0006] The cutter head comprises an outer cutter body and an inner cutter body arranged inside the outer cutter body;
[0007] The inner side wall of the outer blade body is provided with a first drainage groove extending along the axial direction thereof, and the edge of the outer blade body away from the forming shell is provided with a second drainage groove connected to the first drainage groove, so that silicon mud deposits generated by the outer blade body are discharged from the interior of the outer blade body to the outside of the outer blade body through the first drainage groove and the second drainage groove;
[0008] A third drainage groove is provided on the inner blade body at a position corresponding to the first drainage groove, communicating with the first drainage groove, so that silicon sludge deposits generated by the inner blade body are discharged from the inside of the inner blade body to the outside of the inner blade body through the third drainage groove, the first drainage groove, and the second drainage groove in sequence;
[0009] The drainage groove extends from the outer side wall of the forming shell along the axial direction of the forming shell to the outer blade body and is communicated with the second drainage groove.
[0010] In the above technical solution, further, the first drainage groove and the third drainage groove form a stepped groove along the axial direction of the forming shell.
[0011] In the above technical solution, further, the first drainage groove is provided in plurality, and the plurality of drainage grooves are arranged at intervals along the circumferential direction of the outer blade body;
[0012] There are multiple third drainage grooves, which are arranged at intervals along the circumferential direction of the inner cutter body, and the first drainage grooves and the third drainage grooves are arranged in a one-to-one correspondence so that the first drainage grooves are connected to the third drainage grooves.
[0013] In the above technical solution, further, a fourth drainage groove is provided on the inner cutter body; a plurality of the fourth drainage grooves are provided, and the plurality of the fourth drainage grooves and the plurality of the third drainage grooves are staggered along the circumferential direction of the inner cutter body.
[0014] In the above technical solution, further, a fifth discharge groove is provided on the edge of the outer cutter body away from the forming shell;
[0015] A plurality of the fifth drainage troughs are provided, and the plurality of the fifth drainage troughs and the plurality of the second drainage troughs are arranged alternately.
[0016] In the above technical solution, further, a sixth drainage groove connecting the interior of the outer blade body and the exterior of the outer blade body is opened on the side wall of the outer blade body;
[0017] The fourth drainage trough, the fifth drainage trough and the sixth drainage trough are arranged in a one-to-one correspondence.
[0018] In the above technical solution, further, a sixth drainage groove connecting the interior of the outer blade body and the exterior of the outer blade body is opened on the side wall of the outer blade body;
[0019] The fourth drainage groove, the fifth drainage groove, and the sixth drainage groove are staggered in the circumferential direction of the outer blade body.
[0020] In the above technical solution, further, the first drainage groove, the second drainage groove, the third drainage groove, the fourth drainage groove and the fifth drainage groove have the same size in the circumferential direction of the outer cutter body.
[0021] In the above technical solution, further, the size of the sixth drainage groove in the circumferential direction of the outer blade body is larger than the size of the fifth drainage groove in the circumferential direction of the outer blade body.
[0022] The present application also provides a crystal pulling device, including the above-mentioned seed crystal drilling drill.
[0023] Compared with the prior art, this application has the following beneficial effects:
[0024] The present application discloses a seed crystal trepanning drill, comprising a forming shell, a cutter head connected to the forming shell, and a drainage groove;
[0025] The cutter head comprises an outer cutter body and an inner cutter body arranged inside the outer cutter body;
[0026] The inner side wall of the outer blade body is provided with a first drainage groove extending along the axial direction thereof, and the edge of the outer blade body away from the forming shell is provided with a second drainage groove connected to the first drainage groove, so that silicon mud deposits generated by the outer blade body are discharged from the interior of the outer blade body to the outside of the outer blade body through the first drainage groove and the second drainage groove;
[0027] A third drainage groove is provided on the inner blade body at a position corresponding to the first drainage groove, communicating with the first drainage groove, so that silicon sludge deposits generated by the inner blade body are discharged from the inside of the inner blade body to the outside of the inner blade body through the third drainage groove, the first drainage groove, and the second drainage groove in sequence;
[0028] The drainage groove extends from the outer side wall of the forming shell along the axial direction of the forming shell to the outer blade body and is communicated with the second drainage groove.
[0029] In summary, the present application is provided with a third drainage groove on the inner blade body, and the third drainage groove can be used to discharge the silicon mud deposits generated by the inner blade body; the first drainage groove and the second drainage groove are provided on the outer blade body, and the first drainage groove and the second drainage groove can be used to discharge the silicon mud deposits generated by the outer blade body. The above can be said to be the discharge of silicon mud deposits inside the blade head; however, the present application can not only realize the discharge of silicon mud deposits inside the blade head, but also use the drainage groove to realize the rapid diversion of silicon mud deposits discharged from the inside, that is, the silicon mud deposits discharged from the inside can be quickly diverted out, thereby increasing the discharge speed of silicon mud deposits, reducing the resistance of silicon mud deposits to the blade head, thereby improving the working efficiency of the blade head and ensuring the service life of the blade head.
[0030] The present application also provides a crystal pulling device including the above-mentioned seed crystal drilling device, which has all the beneficial effects of the seed crystal drilling device and is not further elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0032] Figure 1 A schematic diagram of the structure of the seed crystal core drill provided in this application from a first perspective;
[0033] Figure 2 A schematic diagram of the structure of the seed crystal core drill provided in this application at a second viewing angle;
[0034] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0035] Figure 4 A schematic diagram of the structure of the seed crystal core drill provided in this application from a third perspective;
[0036] Figure 5 for Figure 4 Enlarged view of point B in the middle;
[0037] Figure 6 A schematic structural diagram of the seed crystal core drill provided in this application at a fourth viewing angle;
[0038] Figure 7 A schematic structural diagram of the seed crystal core drill provided in this application at a fifth viewing angle;
[0039] Figure 8 This is a schematic structural diagram of the seed crystal drill provided in this application at the sixth viewing angle.
[0040] Figure numerals: 1-forming shell; 2-cutter head; 3-drainage groove; 4-outer cutter body; 5-inner cutter body; 6-first drainage groove; 7-second drainage groove; 8-third drainage groove; 9-fourth drainage groove; 10-fifth drainage groove; 11-sixth drainage groove. DETAILED DESCRIPTION
[0041] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.
[0042] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.
[0043] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.
[0044] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.
[0045] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.
[0046] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.
[0047] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.
[0048] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.
[0049] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.
[0050] Example 1
[0051] The present application provides a seed crystal drill, which can reduce the burden of silicon mud accumulation on the seed crystal drill to a certain extent, thereby improving the service life of the seed crystal drill. The specific structure of the seed crystal drill is described as follows.
[0052] The seed crystal drill comprises a forming shell, a cutter head 2 connected to the forming shell, and a drainage groove 3.
[0053] Specifically, combined Figure 1 As shown, the forming shell 1 is a cylindrical structure having a preset inner diameter, so as to be able to form a seed crystal with a preset diameter.
[0054] Specifically, combined Figure 6 and Figure 7 As shown, the cutter head 2 includes an outer cutter body 4 and an inner cutter body 5 disposed inside the outer cutter body 4. Furthermore, the outer cutter body 4 is cylindrical, and the outer diameter of the outer cutter body 4 is the same as the outer diameter of the forming shell. The outer cutter body 4 is surrounded by an installation space, and the inner cutter body 5 is disposed in the installation space against the inner side wall of the outer cutter body 4.
[0055] Specifically, combined Figure 5As shown, the inner wall of the outer blade 4 is provided with a first drainage groove 6 extending along its axial direction, and the first drainage groove 6 is strip-shaped; the edge of the outer blade 4 away from the forming shell is provided with a second drainage groove 7 connected to the first drainage groove 6; in actual use, the outer blade 4 will first contact the mother rod, and then rotate and cut the mother rod. The silicon mud deposits generated in the cutting process are discharged from the inside of the outer blade 4 to the outside of the outer blade 4 through the first drainage groove 6 and the second drainage groove 7; therefore, to a certain extent, the burden of silicon mud deposits on the outer blade 4 can be reduced, the resistance of the outer blade 4 can be reduced, the cutting efficiency can be improved, and the service life of the outer blade 4 can be ensured.
[0056] Specifically, combined Figure 4 and Figure 5 As shown, a third discharge groove 8 connected to the first discharge groove 6 is provided at a position of the inner cutter body 5 corresponding to the first discharge groove 6; when the inner cutter body 5 contacts the mother rod and cuts the mother rod, the silicon mud deposits generated are discharged from the inside of the inner cutter body 5 to the outside of the inner cutter body 5 through the third discharge groove 8, the first discharge groove 6 and the second discharge groove 7 in sequence; therefore, to a certain extent, the burden of the silicon mud deposits on the inner cutter body 5 can be reduced, the resistance of the inner cutter body 5 can be reduced, the cutting efficiency can be improved, and the service life of the inner cutter body 5 can be ensured.
[0057] Specifically, combined Figure 1-Figure 3 As shown, the drainage groove 3 extends from the outer wall of the forming shell along the axial direction of the forming shell to the outer blade body 4 and is connected to the second drainage groove 7. Since the second drainage groove 7 is connected to the first drainage groove 6 and the third drainage groove 8, it can be said that the drainage groove 3 can be connected to the second drainage groove 7, the first drainage groove 6, and the third drainage groove 8. During actual use, the silicon mud deposits generated inside the cutter head 2 can be discharged to the outside of the cutter body and directed out through the drainage groove 3, thereby increasing the discharge speed of the silicon mud deposits and reducing the resistance of the silicon mud deposits to the cutter head 2, thereby improving the working efficiency of the cutter head 2 and ensuring the service life of the cutter head 2.
[0058] In summary, the present application provides a third drainage groove 8 on the inner blade 5, and the third drainage groove 8 can be used to discharge the silicon mud deposits generated by the inner blade 5; a first drainage groove 6 and a second drainage groove 7 are provided on the outer blade 4, and the first drainage groove 6 and the second drainage groove 7 can be used to discharge the silicon mud deposits generated by the outer blade 4. The above can be said to be the discharge of silicon mud deposits inside the cutter head 2; however, the present application can not only discharge the silicon mud deposits inside the cutter head 2, but also use the drainage groove 3 to quickly divert the silicon mud deposits discharged from the inside, that is, the silicon mud deposits discharged from the inside can be quickly diverted out, thereby increasing the discharge speed of the silicon mud deposits, preventing the generated silicon mud deposits from accumulating near the cutter head, reducing the resistance of the silicon mud deposits to the cutter head 2, thereby improving the working efficiency of the cutter head 2 and ensuring the service life of the cutter head 2.
[0059] In this embodiment, further, combined with Figure 4 and Figure 5 As shown, the first drainage groove 6 and the third drainage groove 8 form a stepped groove along the axial direction of the molded shell.
[0060] In summary, the stepped trough formed by the first discharge trough 6 and the third discharge trough 8 is equivalent to discharging the silicon mud deposits in batches and stages during the discharge process of the silicon mud deposits, so that the silicon mud deposits are not all accumulated on the cutter head 2, thereby alleviating the discharge difficulty to a certain extent, increasing the discharge speed, reducing the resistance of the silicon mud deposits to the cutter head 2, further improving the working efficiency of the cutter head 2 and ensuring the service life of the cutter head 2.
[0061] In this embodiment, specifically, a plurality of first drainage grooves 6 are provided, and the plurality of drainage grooves are arranged at intervals along the circumferential direction of the outer blade body 4; Figure 7 As shown, there are two first discharge grooves 6 , which are symmetrically arranged about the axis of the outer blade body 4 .
[0062] Furthermore, a plurality of third drainage grooves 8 are provided, and the plurality of third drainage grooves 8 are arranged at intervals along the circumferential direction of the inner blade body 5, and the plurality of first drainage grooves 6 and the plurality of third drainage grooves 8 are provided in a one-to-one correspondence so that the first drainage grooves 6 and the third drainage grooves 8 are connected. Figure 7 As shown, two third drainage grooves 8 are provided, and the two third drainage grooves 8 are arranged in one-to-one correspondence with the two first drainage grooves 6 so that the first drainage groove 6 is connected to the third drainage groove 8, so that when the inner blade body 5 is cutting, the silicon mud deposits generated can be guided from the inside of the cutter head 2 to the outside of the cutter head 2 through the third drainage groove 8, the first drainage groove 6, and the second drainage groove 7 in sequence.
[0063] In this embodiment, specifically, a fourth drainage groove 9 is further provided on the inner cutter body 5; a plurality of fourth drainage grooves 9 are provided, and the plurality of fourth drainage grooves 9 and the plurality of third drainage grooves 8 are staggered along the circumferential direction of the inner cutter body 5. Figure 8 As shown, two fourth drainage grooves 9 are provided, and the two fourth drainage grooves 9 are symmetrically arranged about the axis of the inner cutter body 5 .
[0064] In summary, two third drainage grooves 8 and two fourth drainage grooves 9 are formed on the inner blade body 5 , and the two third drainage grooves 8 and two fourth drainage grooves 9 can increase the diversion of silicon mud deposits generated in the inner blade body 5 .
[0065] In this embodiment, further, a fifth drainage groove 10 is provided on the edge of the outer blade body 4 away from the forming shell; a plurality of fifth drainage grooves 10 are provided, and the plurality of fifth drainage grooves 10 are arranged alternately with the plurality of second drainage grooves 7. Figure 8 As shown, there are two fifth drainage grooves 10 , and the two fifth drainage grooves 10 are symmetrically arranged about the axis of the outer blade body 4 .
[0066] In summary, two fifth drainage grooves 10, two first drainage grooves 6 and two second drainage grooves 7 are formed on the outer blade 4. The two fifth drainage grooves 10, two first drainage grooves 6 and two second drainage grooves 7 can increase the diversion of silicon mud deposits generated by the outer blade 4.
[0067] In this embodiment, further, a sixth drainage groove 11 is provided on the side wall of the outer blade body 4 to connect the inner part of the outer blade body 4 with the outer part of the outer blade body 4; Figure 8 As shown, there are two sixth drainage troughs 11, and the fourth drainage trough 9, the fifth drainage trough 10 and the sixth drainage trough 11 are arranged in a one-to-one correspondence.
[0068] In summary, the fourth drainage groove 9 can divert the silicon mud deposits generated by the inner blade 5 to the outer blade 4, and the fifth drainage groove 10 and the sixth drainage groove 11 on the outer blade 4 just correspond to the fourth drainage groove 9, so the silicon mud deposits discharged from the fourth drainage groove 9 can be diverted to the outside of the outer blade 4.
[0069] Different from the above embodiment, in this embodiment, a sixth drainage groove 11 connecting the inside of the outer blade 4 with the outside of the outer blade 4 is provided on the side wall of the outer blade 4; the fourth drainage groove 9, the fifth drainage groove 10 and the sixth drainage groove 11 are staggered in the circumferential direction of the outer blade 4.
[0070] In summary, the fourth drainage groove 9 can guide the silicon mud deposits generated by the inner blade 5 to the outer blade 4. In particular, the cutter head 2 rotates at high speed during the actual working process, so centrifugal force will be generated. It can also be said that the silicon mud deposits discharged from the fourth drainage groove 9 may be thrown onto the inner wall of the outer blade 4. In this embodiment, the fourth drainage groove 9, the fifth drainage groove 10 and the sixth drainage groove 11 are staggered in the circumferential direction of the outer blade 4. In fact, to a certain extent, the fifth drainage groove 10 and the sixth drainage groove 11 can also guide the silicon mud deposits discharged from the fourth drainage groove 9 to the outside of the outer blade 4.
[0071] In this embodiment, further, the first drainage groove 6, the second drainage groove 7, the third drainage groove 8, the fourth drainage groove 9 and the fifth drainage groove 10 have the same size in the circumferential direction of the outer blade 4, thereby ensuring the consistency of the diversion of the silicon mud deposits and preventing the problem of jamming during the diversion process.
[0072] In this embodiment, further, the size of the sixth drainage groove 11 in the circumferential direction of the outer blade body 4 is larger than the size of the fifth drainage groove 10 in the circumferential direction of the outer blade body 4. Figure 7 It can be seen that the projections of the fourth and fifth drainage grooves 9 and 10 are strip-shaped, while the projection of the sixth drainage groove 11 is circular. In this embodiment, the circumferential dimension of the sixth drainage groove 11 is larger than that of the fifth drainage groove 10 in the outer blade body 4 in order to achieve approximately the same effective diversion area as the fifth drainage groove 10. This ensures consistent diversion of silicon sludge deposits and prevents stagnation during the diversion process.
[0073] Example 2
[0074] The present application also provides a crystal pulling device including the above-mentioned seed crystal drilling device, which has all the beneficial effects of the seed crystal drilling device and is not further elaborated here.
[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A seed crystal core drill, characterized in that: It includes a forming shell, a cutter head connected to the forming shell, and a drainage groove; The cutter head comprises an outer cutter body and an inner cutter body arranged inside the outer cutter body; The inner side wall of the outer blade body is provided with a first drainage groove extending along the axial direction thereof, and the edge of the outer blade body away from the forming shell is provided with a second drainage groove connected to the first drainage groove, so that silicon mud deposits generated by the outer blade body are discharged from the interior of the outer blade body to the outside of the outer blade body through the first drainage groove and the second drainage groove; A third drainage groove is provided on the inner blade body at a position corresponding to the first drainage groove, communicating with the first drainage groove, so that silicon sludge deposits generated by the inner blade body are discharged from the inside of the inner blade body to the outside of the inner blade body through the third drainage groove, the first drainage groove, and the second drainage groove in sequence; The drainage groove extends from the outer side wall of the forming shell along the axial direction of the forming shell to the outer blade body and is communicated with the second drainage groove.
2. The seed crystal drill according to claim 1, characterized in that: The first drainage groove and the third drainage groove form a stepped groove along the axial direction of the forming shell.
3. The seed crystal drill according to claim 1, characterized in that: There are a plurality of first drainage grooves, and the plurality of drainage grooves are arranged at intervals along the circumferential direction of the outer blade body; There are multiple third drainage grooves, which are arranged at intervals along the circumferential direction of the inner cutter body, and the first drainage grooves and the third drainage grooves are arranged in a one-to-one correspondence so that the first drainage grooves are connected to the third drainage grooves.
4. The seed crystal drill according to claim 3, characterized in that: The inner cutter body is further provided with a fourth drainage groove; a plurality of the fourth drainage grooves are provided, and the plurality of the fourth drainage grooves and the plurality of the third drainage grooves are staggered along the circumferential direction of the inner cutter body.
5. The seed crystal drill according to claim 4, characterized in that: A fifth discharge groove is provided on the edge of the outer blade body facing away from the forming shell; A plurality of the fifth drainage troughs are provided, and the plurality of the fifth drainage troughs and the plurality of the second drainage troughs are arranged alternately.
6. The seed crystal drill according to claim 5, characterized in that: A sixth drainage groove is provided on the side wall of the outer blade body, communicating with the interior of the outer blade body and the exterior of the outer blade body; The fourth drainage trough, the fifth drainage trough and the sixth drainage trough are arranged in a one-to-one correspondence.
7. The seed crystal drill according to claim 5, characterized in that: A sixth drainage groove is provided on the side wall of the outer blade body, communicating with the interior of the outer blade body and the exterior of the outer blade body; The fourth drainage groove, the fifth drainage groove, and the sixth drainage groove are staggered in the circumferential direction of the outer blade body.
8. The seed crystal drill according to claim 6 or 7, characterized in that: The first drainage groove, the second drainage groove, the third drainage groove, the fourth drainage groove, and the fifth drainage groove have the same size in the circumferential direction of the outer blade.
9. The seed crystal drill according to claim 7, characterized in that: A size of the sixth drainage groove in the circumferential direction of the outer blade body is larger than a size of the fifth drainage groove in the circumferential direction of the outer blade body.
10. A crystal pulling device, characterized in that: A seed crystal corer comprising the seed crystal corer according to any one of claims 1 to 9.