A crucible lifting device

Abstract

This utility model provides a crucible lifting device, including a cage, lifting lugs, and crucible wall limiting components. The bottom of the cage has a crucible rod insertion hole. Several lifting lugs and crucible wall limiting components are distributed around the circumference of the cage. The crucible wall limiting components penetrate the cage and can move radially along it. The cage includes at least a first movable lobe and a second movable lobe. The first movable lobe has opposing first and second side ends. The first side end is rotatably connected to the second movable lobe via a first rotating shaft, and the second side end is detachably connected to the second movable lobe. Lifting the crucible using a pre-fabricated cage with suitable mesh size improves work efficiency and prevents debris or materials from spilling and injuring people or damaging the furnace. The crucible wall limiting components restrict the position of the crucible within the cage, preventing displacement and impact damage. Multiple lifting lugs ensure uniform force distribution on the cage and the crucible inside, improving lifting stability. By lifting and replacing crucibles and their thermal components that meet standards, the oxygen content of the crystal pulling products can be reduced, improving product quality.

Description

Technical Field

[0001] This utility model relates to the field of single crystal production equipment technology, and in particular to a crucible lifting device. Background Technology

[0002] In the production of photovoltaic monocrystalline silicon, the operation of lifting crucibles on the furnace platform is an important and arduous task. Because the crucibles and their internal materials are heavy, the industry usually adopts the following method: after binding the crucibles that have been damaged by the heat field with steel cables, they are lifted and transferred by lifting equipment.

[0003] However, existing technologies have the following problems:

[0004] (1) Due to the large volume of the crucible, the operation of binding steel cables around the crucible takes a long time and the operation efficiency is low.

[0005] (2) Before the formal lifting, multiple trial liftings and fine adjustments to the binding position of the steel cable are required. Otherwise, the crucible may tilt, causing the material inside to spill out and injure people or the furnace platform.

[0006] (3) When using steel cables to bind crucibles, the steel cables are usually tied to the outer wall of the crucible in the form of a net bag. The force exerted on different parts of the crucible is not uniform. If the crucible itself is cracked, it is very easy for the crucible to break during hoisting due to uneven force on different parts. In addition, the mesh of the net bag is large, and crucible fragments and the material inside are very easy to fall from the mesh, causing production accidents. Utility Model Content

[0007] The purpose of this invention is to provide a crucible lifting device to solve the problems mentioned in the background art.

[0008] The technical solution adopted by this utility model is: a crucible lifting device, which includes a cage, lifting lugs and a crucible wall limiting member. The bottom of the cage is provided with a crucible rod insertion hole; the lifting lugs and the crucible wall limiting member are respectively distributed in a plurality of positions around the circumference of the cage; the crucible wall limiting member passes through the cage and can move radially along the cage.

[0009] Preferably, the cage includes at least a first movable lobe and a second movable lobe. The first movable lobe has a first side end and a second side end opposite to each other. The first side end is rotatably connected to the second movable lobe via a first rotating shaft, and the second side end is detachably connected to the second movable lobe.

[0010] Preferably, the first rotating shaft is parallel to the axis of the cage.

[0011] Preferably, the first movable petal includes at least a first warp rib, a second warp rib, a first weft rib, and a second weft rib. The first warp rib and the second warp rib are curved ribs. A plurality of first weft ribs and a plurality of first warp ribs intersect to form a first equal-diameter arc-shaped net. The top end of the second weft rib is connected to the first weft rib, and the bottom end is inclined from the first weft rib toward the axis of the cage. A plurality of second weft ribs and a plurality of second warp ribs intersect to form a first variable-diameter arc-shaped net.

[0012] Preferably, the second movable petal includes at least a third warp rib, a fourth warp rib, a third weft rib, and a fourth weft rib. The third warp rib and the fourth warp rib are curved ribs. A plurality of third weft ribs intersect with a plurality of third warp ribs to form a second equal-diameter arc-shaped net. The top end of the fourth weft rib is connected to the third weft rib, and the bottom end is inclined from the third weft rib toward the axis of the cage. A plurality of fourth weft ribs intersect with a plurality of fourth warp ribs to form a second variable-diameter arc-shaped net.

[0013] Preferably, a first hook and a first locking body are respectively provided on the side end of the first equal-diameter arc-shaped network away from the first rotating shaft and the side end of the second equal-diameter arc-shaped network away from the first rotating shaft, and the first locking body is detachably connected to the first hook.

[0014] Preferably, a second hook and a second locking body are respectively provided on a set of adjacent side ends of the first variable diameter arc mesh and the second variable diameter arc mesh, and the second locking body and the second hook are detachably connected; a third hook and a third locking body are respectively provided on another set of adjacent side ends of the first variable diameter arc mesh and the second variable diameter arc mesh, and the third locking body and the third hook are detachably connected.

[0015] Preferably, the crucible wall limiting member includes at least an adjusting rod and an abutment block, the adjusting rod passing through and threaded to the cage, and the abutment block being positioned at one end of the adjusting rod extending into the cage.

[0016] Preferably, the end of the adjusting rod extending out of the cage is provided with a rotating handle.

[0017] Preferably, the side of the abutment block away from the adjusting rod and / or the inner wall of the cage are provided with a buffer layer.

[0018] The beneficial effects of this utility model include:

[0019] (1) Compared with the operation method of binding steel cables, this utility model uses a prefabricated cage with suitable mesh size to assist in lifting the crucible, which can shorten the time spent by workers in connecting the lifting device to the crucible, improve work efficiency, and avoid large crucible fragments or materials inside the crucible falling and injuring people or damaging the furnace platform.

[0020] (2) By limiting the position of the crucible in the cage by the crucible wall limiting component, it can prevent the crucible from impacting the inner wall of the cage due to inertial displacement and causing cracks. In addition, the multiple lifting lugs distributed around the circumference of the cage can disperse the pulling force of the lifting equipment on the cage, so that the cage and the crucible inside are subjected to uniform force and the lifting process is stable.

[0021] (3) By constructing the cage as a side-opening structure, it is beneficial to improve the efficiency of surrounding the cage with the outside of the crucible. After the cage is completely surrounded by the outside of the crucible, it can be finely adjusted by moving the cage laterally to make it coaxial with the crucible. Then, the crucible wall limiting component is used to abut and limit the crucible, thereby ensuring that the weight of the crucible is evenly distributed in the cage. This not only improves the stability of the lifting process, but also, compared with the operation method of binding steel cables, during the debugging process before the formal lifting, this technical solution only needs to push the cage laterally to be coaxial with the crucible once. There is no need to repeatedly pull and adjust the various parts of the steel cable net. Moreover, during the lifting process, the steel cable net may slip along the outer wall of the crucible due to uneven local stress, which further reduces the lifting stability. In comparison, this technical solution is easy to operate, has high pre-lifting debugging efficiency, and good stability during lifting.

[0022] (4) By lifting and replacing crucibles that meet the standards (such as new quartz crucibles) and their heating elements, crystal pulling can be carried out, which can reduce the oxygen content of crystal pulling products and improve the quality of crystal rod products. Attached Figure Description

[0023] Figure 1 This is a top view schematic diagram of an embodiment of the present utility model;

[0024] Figure 2 This is an unfolded view of an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram showing the connection between the first hook and the first locking body in an embodiment of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the crucible wall limiting component in an embodiment of this utility model.

[0027] In the picture:

[0028] 1. Hanging cage; 11. First movable petal; 111. First warp rib; 112. Second warp rib; 113. First weft rib; 114. Second weft rib; 115. First equal-diameter arc-shaped mesh; 116. First variable-diameter arc-shaped mesh; 12. Second movable petal; 121. Third warp rib; 122. Fourth warp rib; 123. Third weft rib; 124. Fourth weft rib; 125. Second equal-diameter arc-shaped mesh; 126. Second variable-diameter arc-shaped mesh; 13. Crate rod insertion hole; 14. First rotating shaft;

[0029] 2. Crucible wall limiting component; 21. Adjusting rod; 22. Abutment block; 23. Rotating handle;

[0030] 31. First hook; 32. First locking body;

[0031] 41. Second hook; 42. Second locking body;

[0032] 51. Third hook; 52. Third locking body;

[0033] 6. Buffer layer;

[0034] 7. Hanging lugs;

[0035] 8. Suspension rope;

[0036] 9. Hanging rings. Detailed Implementation

[0037] The technical solutions of the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0038] In the description of the embodiments of this utility model, it should be understood that the terms "top," "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 utility model. In the description of this utility model, it should be noted that unless otherwise expressly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model through specific circumstances.

[0039] Reference Appendix Figure 1-4This embodiment provides a crucible lifting device, which includes a cage 1, a crucible wall limiting member 2, and lifting lugs 7. The cage 1 has at least a side wall and a bottom wall. The side wall is used to protect the crucible laterally, and the bottom wall is used to support the crucible. To facilitate observation when protecting the crucible and to reduce the material cost of the cage 1, both the side wall and the bottom wall of the cage 1 are configured as mesh. The mesh size can be configured according to actual operational needs to prevent large crucible fragments or materials inside the crucible from spilling out of the mesh (since workers are equipped with safety gear during operation). Protective measures are in place to minimize the impact on personnel and furnace safety when small crucible fragments or spilled material falls from the crucible (the impact is negligible). Since a crucible rod is installed at the bottom of the crucible, it must move with the crucible during hoisting. Therefore, a rod insertion hole 13 is provided at the bottom of the lifting cage 1 to allow the rod to pass. Several lifting lugs 7 are distributed around the circumference of the lifting cage 1. These lugs 7 are used to connect to the lifting equipment. The distributed lugs 7 can distribute the pulling force of the lifting equipment on the lifting cage 1, ensuring even stress distribution across all parts of the cage 1. To prevent the cage 1 and its internal crucible from tilting, the internal dimensions of the cage 1 should be slightly larger than the crucible to ensure smooth placement of the crucible. Although the bottom wall of the cage 1 supports the crucible and the side walls protect it, the crucible and its contents are heavy and have significant inertia. Therefore, it is still difficult to prevent the lifting cables from swaying during the lifting process, causing the crucible to shift horizontally within the cage 1 and collide with it, resulting in cracks. Therefore, several crucible wall limiting components 2 are distributed around the circumference of the cage 1. The wall limiting member 2 penetrates through the cage 1 and can move radially along the cage 1. Before placing the crucible, each crucible wall limiting member 2 is moved radially outward along the cage 1 to provide a smooth placement space for the crucible. After placing the crucible, each crucible wall limiting member 2 is moved radially inward along the cage 1 so that one end of the crucible wall limiting member 2 abuts against the crucible. Several crucible wall limiting members 2 are dispersed around the cage 1 in a circumferential direction, which is equivalent to being dispersed around the crucible in a circumferential direction, thereby providing abutment and limiting at various points on the outer periphery of the crucible and preventing it from undergoing horizontal displacement and impact damage within the cage 1.

[0040] Compared to the method of binding steel cables, the above technical solution uses a prefabricated cage 1 with suitable mesh size to assist in lifting the crucible. This can shorten the time spent by workers connecting the lifting device to the crucible, improve work efficiency, and avoid injury or damage to the furnace platform caused by large crucible fragments or spilled material inside the crucible. The position of the crucible in the cage 1 is restricted by the crucible wall limiting component 2, which can prevent the crucible from impacting the inner wall of the cage 1 due to inertial displacement and causing cracks. In addition, multiple lifting lugs 7 distributed around the circumference of the cage 1 can disperse the pulling force of the lifting equipment on the cage 1, so that the cage 1 and the crucible inside are subjected to uniform force, making the lifting process smooth.

[0041] Due to the limitations of the installation configuration of the crucible itself in the furnace, it is inconvenient to attach the cage 1 from the bottom of the crucible upwards. Therefore, in this embodiment, the cage 1 is used to surround the crucible from the side. The specific configuration is as follows: The cage 1 includes at least a first movable petal 11 and a second movable petal 12. The first movable petal 11 has a first side end and a second side end. The first side end is rotatably connected to the second movable petal 12 through a first rotating shaft 14. The second side end is detachably connected to the second movable petal 12. The first rotating shaft 14 is parallel to the axis of the cage 1.

[0042] When connecting the cage 1 and the crucible, separate the second side end of the first movable petal 11 from the second movable petal 12 so that they can rotate around the first rotating shaft 14 respectively, so that the cage 1 unfolds from the side. Then, push the cage 1 laterally to get closer to the crucible, so that the first movable petal 11 and the second movable petal 12 surround the crucible from both sides until the crucible is completely located in the space between the first movable petal 11 and the second movable petal 12. Then rotate the first movable petal 11 and the second movable petal 12 so that the cage 1 closes from the side to completely surround the crucible. At this time, the second side end of the first movable petal 11 and the second movable petal 12 are connected and secured.

[0043] After the cage 1 is completely surrounded by the crucible, it can be moved laterally for fine-tuning. Once the cage 1 is aligned with the crucible, the crucible wall limiting component 2 is moved to abut and limit the crucible. This ensures that the weight of the crucible is evenly distributed within the cage 1, which not only improves the stability of the lifting process but also, compared to the method of binding steel cables, only requires a one-time lateral movement of the cage 1 to align with the crucible during the pre-lifting adjustment process. There is no need to repeatedly pull and adjust various parts of the steel cable net. Furthermore, during the lifting process, the steel cable net may slip along the outer wall of the crucible due to uneven local stress, further reducing the lifting stability. In comparison, this technical solution is simple to operate, has high pre-lifting adjustment efficiency, and good stability during lifting.

[0044] Considering the shape of the crucible itself, to improve the support and protection effect on the crucible, this embodiment configures the first movable petal 11 to include several first warp ribs 111, several second warp ribs 112, several first weft ribs 113, and several second weft ribs 114. The first warp ribs 111 and second warp ribs 112 are curved ribs. The lengths of the several first warp ribs 111 are equal, each first warp rib 111 extends horizontally, and the several first warp ribs 111 are dispersed vertically. The several first weft ribs 113 and the several first warp ribs 111 intersect to form a first equal-diameter arc-shaped mesh 115. The top view projection outline of the first equal-diameter arc-shaped mesh 115 is consistent with the first warp ribs 114. The top-view projection outline of 1 is the same; the lengths of several second meridional ribs 112 are not equal. More specifically: from the top to the bottom of the cage, the lengths of several second meridional ribs 112 gradually decrease. Each second meridional rib 112 extends horizontally, and several second meridional ribs 112 are dispersed vertically. The top of the second weft rib 114 is connected to the first weft rib 113, and the bottom of the second weft rib 114 is inclined from the first weft rib 113 toward the axis of the cage 1. Several second weft ribs 114 and several second meridional ribs 112 intersect to form a first variable diameter arc mesh 116. The first variable diameter arc mesh 116 is similar to the inclination direction of the bottom surface of the crucible to improve the fit with the bottom surface of the crucible and enhance the support effect.

[0045] Furthermore, the second movable lobe 12 is configured to include several third meridional ribs 121, several fourth meridional ribs 122, several third latitudinal ribs 123, and several fourth latitudinal ribs 124. The third meridional ribs 121 and fourth meridional ribs 122 are curved ribs. The several third meridional ribs 121 are of equal length, each third meridional rib 121 extends horizontally, and the several third meridional ribs 121 are dispersed vertically. The several third latitudinal ribs 123 and the several third meridional ribs 121 intersect to form a second equal-diameter arc-shaped mesh 125. The top-view projection outline of the second equal-diameter arc-shaped mesh 125 is the same as the top-view projection outline of the third meridional ribs 121. The lengths of the fourth meridian ribs 122 are unequal. More specifically, from the top to the bottom of the cage, the lengths of several fourth meridian ribs 122 gradually decrease. Each fourth meridian rib 122 extends horizontally, while several fourth meridian ribs 122 disperse vertically. The top of the fourth weft rib 124 connects to the third weft rib 123, and the bottom of the fourth weft rib 124 is inclined from the third weft rib 123 toward the axis of the cage 1. Several fourth weft ribs 124 and several fourth meridian ribs 122 intersect to form a second variable diameter arc-shaped mesh 126. The second variable diameter arc-shaped mesh 126 is similar to the inclination direction of the crucible bottom surface to improve the fit with the crucible bottom surface and enhance the support effect.

[0046] More intuitively, after the first equal-diameter arc-shaped mesh 115 and the second equal-diameter arc-shaped mesh 125 are joined together, the top view projection is circular, and the inner diameter of the circle is larger than the outer diameter of the crucible; after the first variable-diameter arc-shaped mesh 116 and the second variable-diameter arc-shaped mesh 126 are joined together, they form an inverted cone-shaped three-dimensional outline with the same tilt direction as the bottom surface of the crucible, and the bottom ends of the first variable-diameter arc-shaped mesh 116 and the second variable-diameter arc-shaped mesh 126 are joined together to form a crucible rod insertion hole 13 to avoid the crucible rod at the bottom of the crucible.

[0047] Reference Appendix Figure 2-3 In this embodiment, the second side end of the first movable petal 11 and the second movable petal 12 can be connected by a snap-lock structure (existing technology, not described here). Specifically, the side end of the first equal-diameter arc-shaped mesh 115 away from the first rotating shaft 14 and the side end of the second equal-diameter arc-shaped mesh 125 away from the first rotating shaft 14 are respectively provided with a first hook 31 and a first locking body 32, and the first locking body 32 and the first hook 31 are detachably connected; the side end of the first variable-diameter arc-shaped mesh 116 away from the first rotating shaft 14 and the side end of the second variable-diameter arc-shaped mesh 126 away from the first rotating shaft 14 are respectively provided with a second hook 41 and a second locking body 42, and the second locking body 42 and the second hook 41 are detachably connected.

[0048] To ensure that the first movable lobe 11 and the second movable lobe 12 can rotate smoothly around the first rotating shaft 14 when the second side end of the first movable lobe 11 separates from the second movable lobe 12, the first rotating shaft 14 should be positioned on the first equal-diameter arc-shaped mesh 115 and the second equal-diameter arc-shaped mesh 125. In this configuration, one set of contact ends of the first equal-diameter arc-shaped mesh 115 and the second equal-diameter arc-shaped mesh 125 are connected through the first rotating shaft 14, and the other set of contact ends are connected through the first hook 31 and the first locking body 32. However, the first variable diameter... The arc-shaped mesh 116 and the second variable-diameter arc-shaped mesh 126 have only one set of contact ends connected by the second hook 41 and the second locking body 42. Therefore, in this embodiment, the other set of contact ends of the first variable-diameter arc-shaped mesh 116 and the second variable-diameter arc-shaped mesh 126, that is, the side end of the first variable-diameter arc-shaped mesh 116 near the first rotating shaft 14 and the side end of the second variable-diameter arc-shaped mesh 126 near the second rotating shaft 14, are respectively provided with a third hook 51 and a third locking body 52. ​​The third locking body 52 and the third hook 51 are detachably connected.

[0049] Reference Appendix Figure 4The crucible wall limiting component 2 includes at least an adjusting rod 21 and an abutment block 22. The adjusting rod 21 can be a screw, with threaded holes or welded threaded sleeves on the first equal-diameter arc-shaped mesh 115 and the second equal-diameter arc-shaped mesh 125. The axis of the threaded hole or threaded sleeve extends radially along the cage 1. The adjusting rod 21 is threaded through and connected to the threaded hole or threaded sleeve. The abutment block 22 is positioned at the end of the adjusting rod 21 that extends into the cage 1. By turning the adjusting rod 21, the abutment block 22 can be moved radially along the cage 1, thereby changing the distance between the abutment block 22 and the inner wall of the cage 1. This provides a larger placement space before placing the crucible, or allows for abutment limiting of the crucible after placement and adjustment of its position.

[0050] To facilitate worker operation, this embodiment has a rotating handle 23 at the end of the adjusting rod 21 that extends out of the cage 1, which increases the area for the person to hold and apply force, and improves the smoothness and comfort of operation.

[0051] In actual production, there are many reasons for silicon leakage from crucibles, not all of which are due to cracks in the crucible itself. Therefore, some crucibles will be reused after being moved, cleaned, and repaired. So when moving crucibles, damage to the crucibles should be avoided as much as possible. Therefore, in this embodiment, buffer layers 6 are provided on the side of the abutment block 22 away from the adjusting rod 21 (i.e. the side close to the outer wall of the crucible) and the inner wall of the lifting cage 1, respectively. The material of the buffer layer 6 can be configured according to actual needs. In this embodiment, polytetrafluoroethylene buffer layer 6 is selected as an example to reduce abrasion or damage to the outer wall of the crucible.

[0052] During implementation, each lifting lug 7 is connected to a lifting rope 8, and the other ends of several lifting ropes 8 converge at the lifting ring 9 and are connected to the lifting equipment through slings.

[0053] The method of using this crucible lifting device is as follows:

[0054] (1) Use slings, shackles 9, ropes 8, etc. to connect the cage 1 to the lifting equipment, lower the cage 1 to the outside of the crucible, and match the height of the crucible.

[0055] (2) Separate the first locking body and the first hook, separate the second locking body and the second hook, separate the third locking body and the third hook, and rotate the first movable petal 11 and the second movable petal 12 around the first rotating shaft 14 so that the second side end of the first movable petal 11 moves away from the second movable petal 12.

[0056] (3) Move the cage 1 horizontally toward the crucible so that the first movable petal 11 and the second movable petal 12 surround the two sides of the crucible respectively;

[0057] (4) Rotate the first movable petal 11 and the second movable petal 12 around the first rotating shaft 14 so that the second side end of the first movable petal 11 approaches the second movable petal 12.

[0058] (5) Connect the first locking body and the first hook, the second locking body and the second hook, and the third locking body and the third hook to make the first movable flap 11 and the second movable flap 12 securely connected.

[0059] (6) Move horizontally to fine-tune cage 1 until it is coaxial with crucible;

[0060] (7) Rotate the adjusting rod 21 to drive the abutting block 22 closer to the crucible, so that each abutting block 22 on the outer periphery of the crucible abuts against the crucible respectively;

[0061] (8) Start the lifting equipment to lift and transfer the cage 1 and the crucible inside.

[0062] After the silicon-leaking crucible is removed, a new crucible can be placed in the aforementioned device and moved to the furnace platform using the aforementioned method.

[0063] Compared with the prior art, the present invention has at least the following beneficial effects:

[0064] (1) Compared with the operation method of binding steel cables, the present invention uses a prefabricated cage 1 with suitable mesh size to assist in lifting the crucible, which can shorten the time spent by workers in connecting the lifting device to the crucible, improve work efficiency, and avoid large crucible fragments or materials inside the crucible falling and injuring people or damaging the furnace.

[0065] (2) By limiting the position of the crucible in the cage 1 by the crucible wall limiting member 2, it can prevent the crucible from impacting the inner wall of the cage 1 due to inertial displacement and causing cracks. In addition, the multiple lifting lugs 7 distributed around the cage 1 can disperse the pulling force of the lifting equipment on the cage 1, so that the cage 1 and the crucible inside are subjected to uniform force, and the lifting process is stable.

[0066] (3) By configuring the cage 1 as a side-opening structure, it is beneficial to improve the efficiency of surrounding the cage 1 with the outside of the crucible. After the cage 1 is completely surrounded by the outside of the crucible, it can be finely adjusted by moving the cage 1 horizontally to make it coaxial with the crucible. Then, the crucible wall limiting part 2 is used to abut and limit the crucible, so as to ensure that the weight of the crucible is evenly distributed in the cage 1. This not only improves the stability of the lifting process, but also, compared with the operation method of binding steel cables, in the debugging process before the formal lifting, this technical solution only needs to push the cage 1 horizontally once to be coaxial with the crucible. There is no need to repeatedly pull and adjust the various parts of the steel cable net. Moreover, during the lifting process, the steel cable net may slip along the outer wall of the crucible due to uneven local force, which further reduces the lifting stability. In comparison, this technical solution is easy to operate, has high pre-lifting debugging efficiency, and good stability during lifting.

[0067] (4) By lifting and replacing crucibles that meet the standards (such as new quartz crucibles and initial charge) and their thermal components, crystal pulling production can be carried out, which can reduce the oxygen content of the pulled crystal product - single crystal rod and improve the quality of the crystal rod product.

[0068] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crucible lifting device, characterized by, The device includes a cage, lifting lugs, and a crucible wall limiting component. The bottom of the cage is provided with a crucible rod insertion hole. Several lifting lugs and crucible wall limiting components are distributed around the circumference of the cage. The crucible wall limiting component passes through the cage and can move radially along the cage.

2. The crucible retrieval device of claim 1, wherein, The cage includes at least a first movable lobe and a second movable lobe. The first movable lobe has a first side end and a second side end opposite to each other. The first side end is rotatably connected to the second movable lobe via a first rotating shaft, and the second side end is detachably connected to the second movable lobe.

3. The crucible retrieval device of claim 2, wherein, The first rotating shaft is parallel to the axis of the cage.

4. A crucible lifting device according to claim 2 or 3, characterised in that The first movable lobe includes at least a first warp rib, a second warp rib, a first weft rib, and a second weft rib. The first warp rib and the second warp rib are curved ribs. A plurality of first weft ribs and a plurality of first warp ribs intersect to form a first equal-diameter arc-shaped net. The top end of the second weft rib is connected to the first weft rib, and the bottom end is inclined from the first weft rib toward the axis of the cage. A plurality of second weft ribs and a plurality of second warp ribs intersect to form a first variable-diameter arc-shaped net.

5. The crucible retrieval device of claim 4, wherein, The second movable lobe includes at least a third warp rib, a fourth warp rib, a third weft rib, and a fourth weft rib. The third warp rib and the fourth warp rib are curved ribs. Several third weft ribs intersect with several third warp ribs to form a second equal-diameter arc-shaped net. The top end of the fourth weft rib is connected to the third weft rib, and the bottom end is inclined from the third weft rib toward the axis of the cage. Several fourth weft ribs intersect with several fourth warp ribs to form a second variable-diameter arc-shaped net.

6. The crucible retrieval device of claim 5, wherein, The first equal-diameter arcuate net and the second equal-diameter arcuate net, which are located away from the first pivot, are respectively provided with a first hook and a first locking body. The first locking body and the first hook are detachably connected.

7. A crucible lifting device according to claim 5 or 6, characterised in that The first variable diameter arc mesh and the second variable diameter arc mesh each have a second hook and a second locking body on one of their adjacent side ends, and the second locking body and the second hook are detachably connected; the first variable diameter arc mesh and the second variable diameter arc mesh each have a third hook and a third locking body on another set of adjacent side ends, and the third locking body and the third hook are detachably connected.

8. The crucible retrieval device of claim 1, wherein, The crucible wall limiting component includes at least an adjusting rod and an abutment block. The adjusting rod passes through and is threaded to the cage, and the abutment block is located at one end of the adjusting rod that extends into the cage.

9. The crucible retrieval device of claim 8, wherein, The end of the adjusting rod extending out of the cage is equipped with a rotating handle.

10. A crucible lifting device according to claim 8 or 9, characterised in that The side of the abutment block away from the adjusting rod and / or the inner wall of the cage are provided with a buffer layer.

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