Crucible lifting device for monocrystalline silicon banking furnace

Abstract

The utility model relates to a crucible lifting device for a monocrystalline silicon banking furnace, which comprises a crucible tray and a lifting component, and a crucible is U-shaped and comprises a crucible side and a crucible support; the crucible tray comprises a supporting ring and a plurality of lifting lugs, the annular supporting cavity comprises an upper cavity body and a lower cavity body, the lifting assembly comprises a lifting seat and a plurality of lifting arms, the lifting arms are distributed in an annular array with the center line of the annular supporting cavity as the reference, and the lower end of each lifting arm is detachably arranged on the corresponding lifting lug. On one hand, the butt joint between the crucible and the tray is increased based on the pocket support and the attachment, so that the butt joint firmness is increased, the acting points are uniformly dispersed, and the damage rate in the hoisting process is reduced; and on the other hand, the lifting arms with equal arm lengths and the annular array layout are adopted, so that the provided lifting acting force is relatively balanced, lifting is carried out by taking the center line of the annular supporting cavity as the reference, meanwhile, the lifting arms can be taken and placed lightly, personnel do not need to enter a thermal field for operation, and potential safety hazards are eliminated.

Description

Technical Field

[0001] This utility model belongs to the field of monocrystalline silicon furnace annealing technology, specifically relating to a crucible lifting device for monocrystalline silicon furnace annealing. Background Technology

[0002] Crystalline silicon is the basic raw material for crystalline silicon solar cells. It is obtained from high-purity virgin polycrystalline silicon through the Czochralski method and the directional solidification method. During the crystalline silicon production process, a furnace blockage occurs (a phenomenon where premature solidification of silicon occurs during crystal growth due to improper temperature control or other reasons, causing it to adhere to the inner wall of the growth furnace or other components. This not only affects production efficiency but may also threaten the safety of equipment and operators). As the temperature decreases, the silicon solidifies, and the solidified silicon adheres to the carrier containing it, making it difficult to remove. If manual handling is required, it places a significant strain on the workers' bodies, easily leading to injury. Furthermore, because operators cannot handle it gently, prolonged impacts also pose a safety hazard to graphite components, especially disrupting normal production; it is an unstable factor.

[0003] For example, CN112575370A designs a crucible lifting device for a semiconductor-grade silicon single crystal furnace and the silicon single crystal furnace itself. Specifically, the lifting device uses a downward-extending third link that surrounds the crucible tray, and hooks support and lift the tray. The opening and closing of the third link is driven by the first and second links and the cross-shaped turntable located on the support. The first and second links and the cross-shaped turntable do not occupy furnace space and can accurately control the opening and closing angle of the third link, avoiding contact with the furnace wall. This crucible lifting device occupies very little furnace space and is specifically designed for environments with small gaps between the crucible and the furnace wall in silicon single crystal furnaces. However, this crucible lifting device has the following technical drawbacks:

[0004] 1) The crucible tray is supported by a hook and lifted out. The contact between the hook and the tray is a point contact, and the force is concentrated, which will damage the tray. Once damaged, the maintenance cost is high.

[0005] 2) Because the outer edge of the crucible tray has a convex ring, and the outer side of the convex ring has several inwardly recessed grooves, when the hook tilts and retracts inward, the lower end of the third connecting rod is received into the groove, and the hook is hung on the bottom of the convex ring. In short, this structure is required for crucibles with special shapes, and the grooves, hooks and convex rings must be designed. At the same time, the external support and internal adjustment are also required. This is not only complicated to operate, but there is also a probability that the crucible tray and the hook will collide. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an improved crucible lifting device for monocrystalline silicon furnace annealing.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A crucible lifting device for monocrystalline silicon furnace annealing includes a crucible tray and a lifting assembly. The crucible is U-shaped and includes an upper crucible liner and a lower crucible support. The crucible tray includes a support ring forming an annular cavity inside and multiple lifting lugs fixed to the top of the support ring. The annular cavity includes an upper cavity that matches the crucible liner and a lower cavity that matches the crucible support to support it. The lifting assembly includes a lifting base and multiple lifting arms with equal arm lengths mounted on the lifting base at their upper ends. The multiple lifting arms are arranged in a circular array with the center line of the annular cavity as a reference, and the lower ends of each lifting arm are attached to the corresponding lifting lugs.

[0009] Preferably, the rounded corner of the crucible holder fits snugly against the lower cavity, and the bottom of the crucible holder protrudes from the lower end of the lower cavity. This ensures more stable contact between the crucible and the tray, preventing displacement between them during lifting.

[0010] According to a specific embodiment and preferred aspect of this utility model, the support ring is a semi-circular clamp. This facilitates assembly and disassembly, especially when the crucible is lifted, preventing the crucible from touching during disassembly.

[0011] According to a specific embodiment and preferred aspect of this utility model, multiple lifting lugs are arranged in a circular array on the support ring, with the center line of the upper cavity as a reference. This circular array arrangement, with the same center and identical arrangement, facilitates the alignment and assembly of the lower end of the boom with the lifting lugs.

[0012] Preferably, the lifting lugs and the boom are provided in a one-to-one correspondence. Furthermore, the lifting lugs and the boom are hooked together from their ends. This hooking connection satisfies the lifting requirements while also facilitating assembly and disassembly.

[0013] According to another specific embodiment and preferred aspect of this utility model, each boom is arranged parallel to or intersects the center line of the annular support cavity. Here, whether intersecting or parallel, each boom can provide a relatively balanced lifting force to improve lifting stability.

[0014] According to another specific embodiment and preferred aspect of this utility model, the lifting base includes multiple support arms intersecting from the middle, and a lifting rod vertically connected to the intersection of each support arm. The support arms, lifting boom, and lifting lugs correspond one-to-one, and the two ends of the lifting boom are connected to the support arms and lifting lugs. The centerline of the lifting rod coincides with the centerline of the annular support cavity, and the top of the lifting rod forms a hook connection. Based on the corresponding assembly of the support arms, lifting boom, and lifting lugs, and the coincidence of the centerline of the lifting rod with the centerline of the annular support cavity, the crucible can move along its own centerline to complete the lifting.

[0015] Preferably, the boom is rod-shaped, rope-shaped, or chain-shaped. The appropriate configuration is selected based on actual needs.

[0016] In some specific embodiments, there are four outriggers arranged in a cross shape; there are four booms and four lifting lugs, wherein the booms are made of steel wire ropes and are fixed from the upper end to the outriggers and hooked to the lifting lugs at the lower end. During lifting, each steel wire rope remains parallel to the center line of the annular support cavity.

[0017] Due to the implementation of the above technical solution, this utility model has the following advantages compared with the prior art:

[0018] In existing crucible lifting devices, the crucible tray is supported and lifted using a hook. The contact between the hook and the tray is point contact, resulting in concentrated force and potential damage to the tray, leading to high maintenance costs. Furthermore, the crucible tray has an outer convex ring with several inwardly recessed grooves on its outer side. When the hook tilts inward, the lower end of the third connecting rod is accommodated in these grooves, and the hook is hooked at the bottom of the convex ring. In short, this structure requires special-shaped crucibles and necessitates the design of grooves, hooks, and the convex ring, along with alignment adjustments for external support and inward retraction. This not only makes operation complex but also carries the risk of the crucible tray colliding with the hook. This application, however, proposes a comprehensive structural design for a crucible lifting device for monocrystalline silicon furnaces, cleverly solving these problems. To address the shortcomings and defects of existing technologies, this single-crystal silicon furnace crucible lifting device utilizes a method where the lower cavity forms a support for the crucible, and the upper cavity matches and fits the crucible base. The support ring and crucible are concentrically connected, and then, with equal-length booms forming the lifting arm, the crucible is lifted upwards along the centerline of the annular support cavity. Therefore, this invention, on the one hand, increases the connection between the crucible and the tray through support and fitting, not only increasing the firmness of the connection but also evenly distributing the force, reducing the damage rate during lifting. On the other hand, the equal-length booms and annular array layout provide a relatively balanced lifting force, and the lifting is carried out with the centerline of the annular support cavity as the reference. This allows for gentle handling and eliminates the need for personnel to enter the hot zone, thus eliminating safety hazards. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the crucible lifting device for monocrystalline silicon oven sealing in this embodiment;

[0020] Figure 2 for Figure 1 Schematic diagram of the lifting device for the medium crucible in its lifting state;

[0021] Figure 3 for Figure 2 A half-sectional view of the connection between the central support ring and the crucible;

[0022] Figure 4 for Figure 1Schematic diagram of the structure of the crucible tray;

[0023] Among them: 1. Crucible; 10. Crucible base; 11. Crucible support;

[0024] 2. Crucible tray; 20. Support ring; 200. Annular support cavity; a. Upper cavity; b. Lower cavity; 21. Lifting lug;

[0025] 3. Lifting assembly; 30. Lifting base; 300. Boom rod; 301. Lifting rod; 31. Boom; 310. Hook. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0031] like Figures 1 to 4 As shown, the crucible lifting device for monocrystalline silicon oven in this embodiment is used to lift the crucible 1 from the monocrystalline silicon oven, and includes a crucible tray 2 and a lifting assembly 3.

[0032] Specifically, the crucible 1 is U-shaped and includes a crucible base 10 at the top and a crucible support 11 at the bottom.

[0033] The crucible tray 2 includes a ring 20 forming an annular cavity 200 inside, and a plurality of lugs 21 fixed to the top of the ring 20. The annular cavity 200 includes an upper cavity a that matches the crucible liner 10 at the top, and a lower cavity b that matches the crucible holder 11 at the bottom to support the crucible holder 11.

[0034] In this example, the upper cavity a is columnar and fits snugly against the crucible 10; the lower cavity b tapers inward from the bottom of the upper cavity a, with the taper matching the rounded corner of the bottom of the crucible support 11 when the crucible 1 aligns with the support ring 20. Simultaneously, the bottom of the crucible support 11 protrudes from the taper and is exposed at the bottom of the support ring 20. This ensures more stable contact between the crucible and the tray, preventing displacement during lifting. Multiple lifting lugs 21 are arranged in a circular array on the support ring 20, with the centerline of the upper cavity a as a reference. In this example, the support ring 20 is composed of two disassembled semi-circular clamp pieces. There are four lifting lugs 21, with two located on each semi-circular clamp. This facilitates assembly and disassembly, especially after the crucible is lifted, preventing contact between the crucibles during assembly and disassembly.

[0035] The lifting assembly 3 includes a lifting base 30, multiple booms 31 with equal arm lengths mounted on the lifting base 30 at their upper ends, and a lifting power unit (not shown in the figure). The multiple booms 31 are arranged in a circular array with the center line of the annular support cavity 200 as the reference, and the lower end of each boom 31 is attached to the corresponding lifting lug 21.

[0036] In some specific embodiments, the lifting lugs 21 and the boom 31 are arranged in a one-to-one correspondence, and each lifting lug 21 and boom 31 is hooked together from the end. The hooking connection is designed to meet the lifting requirements while also facilitating assembly and disassembly. That is, it is arranged in a circular array with the same center to facilitate the alignment and assembly of the lower end of the boom with the lifting lugs.

[0037] The lifting base 30 includes multiple intersecting support arms 300 and lifting rods 301 vertically connected at the intersections of the support arms 300. Each support arm 300, lifting boom 31, and lifting lug 21 corresponds to a specific arm, with both ends of each lifting boom 31 connected to the support arm 300 and the lifting lug 21. The centerline of the lifting rod 301 coincides with the centerline of the annular support cavity 200, and the top of the lifting rod 301 forms a hook connection. Based on the corresponding assembly of the support arms, lifting booms, and lifting lugs, and the coincidence of the centerline of the lifting rod with the centerline of the annular support cavity, the crucible can be lifted by moving along its own centerline. Each lifting boom 31 is arranged parallel to or intersecting with the centerline of the annular support cavity 200. Whether intersecting or parallel, each boom provides a relatively balanced lifting force to improve lifting stability.

[0038] In some specific embodiments, there are four outriggers 300 arranged in a cross shape; there are four booms 31 and four lifting lugs 21. The booms 31 are steel wire ropes (or connecting rods or chains), and are fixed to the outriggers 300 from the upper end and hooked to the lifting lugs 21 from the lower end via hooks 310. During lifting, each steel wire rope is kept parallel to the center line of the annular support cavity 200 (or intersecting in an umbrella-like shape).

[0039] In summary, by adopting this crucible lifting device for monocrystalline silicon furnaces, the lower cavity forms a support for the crucible holder, and the upper cavity matches and fits the crucible base. The support ring and crucible are concentrically connected. Then, the crucible is lifted upwards along the center line of the annular support cavity during lifting by a crane with equal arm lengths. Therefore, this invention, on the one hand, increases the connection between the crucible and the tray by supporting and fitting, which not only increases the firmness of the connection but also evenly distributes the force points, reducing the damage rate during lifting. On the other hand, the crane with equal arm lengths and the annular array layout provide a relatively balanced lifting force, and the lifting is carried out with the center line of the annular support cavity as the reference. At the same time, it can be handled gently and does not require personnel to enter the hot zone for operation, eliminating safety hazards. Thirdly, the crucible holder fits into the lower cavity from the rounded corner section of the U-shape, and the bottom of the crucible holder is exposed from the lower end of the lower cavity. This design ensures more stable contact between the crucible and the tray, preventing displacement during lifting. Fourthly, the support ring is a semi-circular clamp, facilitating assembly and disassembly, especially after the crucible is lifted, preventing contact during disassembly. Fifthly, lifting lugs and booms are arranged in a one-to-one correspondence, with multiple lugs distributed in a circular array on the support ring based on the centerline of the upper cavity. This same circular array arrangement facilitates alignment and assembly between the lower end of the boom and the lugs. The lugs and booms are hooked together from their ends, satisfying lifting requirements while also facilitating disassembly. Sixthly, regardless of whether the centerlines of the booms and the annular support cavity intersect or are parallel, each boom provides a relatively balanced lifting force, improving lifting stability. Seventhly, the corresponding assembly of the support rod, boom, and lugs, with the centerline of the support rod coinciding with the centerline of the annular support cavity, allows the crucible to move along its own centerline to complete the lifting. Eighthly, the boom can be rod-shaped, rope-shaped, or chain-shaped, selected according to actual needs.

[0040] The present utility model has been described in detail above, with the aim of enabling those skilled in the art to understand its contents and implement it. However, this description should not be construed as limiting the scope of protection of the present utility model. All equivalent changes or modifications made in accordance with the spirit and essence of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A single crystal silicon furnace retort hoisting device comprising a retort tray, a hoisting assembly, characterized in that: The crucible is U-shaped, and comprises a crucible body at the upper portion and a crucible support at the lower portion; the crucible tray comprises a support ring forming a ring-shaped support cavity, and a plurality of lifting lugs fixed on the top of the support ring, wherein the ring-shaped support cavity comprises an upper cavity matched with the crucible body at the upper portion, and a lower cavity matched with the crucible support at the lower portion to hold the crucible support, and the lifting assembly comprises a lifting seat, and a plurality of lifting arms with equal arm lengths mounted on the lifting seat at the upper end, wherein the plurality of lifting arms are arranged in a ring-shaped array with the center line of the ring-shaped support cavity as the reference, and the lower end of each lifting arm is detachably connected to the corresponding lifting lug.

2. The single crystal silicon furnace holding crucible hoisting device according to claim 1, characterized by: The crucible support is attached to the lower end of the lower cavity of the U-shaped rounded section, and the bottom of the crucible support is exposed from the lower end of the lower cavity.

3. The single crystal silicon furnace holding crucible hoisting device according to claim 1, characterized by: The support ring is a half-round hoop member.

4. The single crystal silicon furnace holding crucible hoisting device according to claim 1, characterized by: The plurality of lifting lugs are arranged in a ring-shaped array on the support ring with the center line of the upper cavity as the reference.

5. The single crystal silicon furnace holding crucible hoisting device according to claim 4, characterized by: The lifting lugs and the lifting arms are arranged one-to-one.

6. The single crystal silicon furnace holding crucible hoisting device according to claim 5, characterized by: The lifting lugs and the lifting arms are hook-connected from the opposite ends.

7. The single crystal silicon furnace pot hoisting device according to claim 1, characterized by: Each lifting arm is arranged parallel to or intersecting the center line of the ring-shaped support cavity.

8. The single crystal silicon retort hoist of any one of claims 1 to 7, wherein: The lifting seat comprises a plurality of branch arm rods intersecting at the middle portion, and a lifting rod connected perpendicularly at the intersection of each branch arm rod, wherein the branch arm rods, the lifting arms, and the lifting lugs are arranged one-to-one, and the two ends of the lifting arms are connected to the branch arm rods and the lifting lugs; the center line of the lifting rod coincides with the center line of the ring-shaped support cavity, and the top of the lifting rod forms a hooking portion.

9. The single crystal silicon furnace holding crucible hoisting device according to claim 8, characterized by: The lifting arms are in the shape of rods, ropes, or chains.

10. The single crystal silicon annealing furnace crucible hoisting apparatus according to claim 9, characterized by: The branch arm rods are four in number and in the shape of a cross; the lifting arms and the lifting lugs are also four in number, wherein the lifting arms are steel wire ropes, and are fixed at the upper end to the branch arm rods and at the lower end to the lifting lugs, and during lifting, each steel wire rope remains parallel to the center line of the ring-shaped support cavity.

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