Quartz crucible of single crystal furnace

Abstract

The utility model discloses a quartz crucible of a single crystal furnace, which comprises a heating mechanism, an opening of the heating mechanism is upward, a plurality of expansion grooves are arranged inside the outer side of the upper end of the heating mechanism, a crucible upper part is arranged inside the upper end of the heating mechanism, and a crucible bottom is clamped inside the lower end of the crucible upper part. A lifting rod is arranged on the lower side of the bottom of the crucible and slidably connected to the interior of the center of the lower end of the heating mechanism, a limiting supporting plate is arranged at the lower end of the bottom of the crucible and connected with the lifting rod through the limiting supporting plate, the quartz crucible is divided into a detachable crucible upper portion and a detachable crucible bottom, and the crucible upper portion and the crucible bottom are assembled in a clamped mode. The bottom of the crucible and the limiting supporting plate are clamped through the limiting clamping jaw and the limiting protruding block, the spring groove is formed in the lower end of the limiting supporting plate, the supporting plate and the lifting rod are elastically connected through the internal assembling spring, it is ensured that the upper portion and the bottom of the crucible are tightly attached during assembling, and stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to photovoltaic single crystal silicon production, and particularly relates to a quartz crucible of a single crystal furnace. Background Art

[0002] In the production process of photovoltaic monocrystalline silicon, the single crystal furnace is an indispensable key equipment. Among them, the quartz crucible is an important container for holding molten silicon liquid. Its structure and performance directly affect the quality and production efficiency of monocrystalline silicon.

[0003] Traditional quartz crucibles are mostly monolithic. After use, residual silicon slag inside these crucibles is difficult to clean, requiring significant time and labor, impacting production efficiency. Because they cannot be disassembled, damage to a single part of the crucible often requires replacement of the entire crucible, resulting in significant waste of resources, increased production costs, and reduced economic efficiency. Without the ability to replace components specifically for localized damage, the overall replacement frequency is high, increasing production costs and downtime.

[0004] To address these issues, while some existing technologies have attempted to improve the structure of quartz crucibles, these efforts have primarily focused on improving materials or optimizing heating methods, failing to fundamentally address core issues such as difficult cleaning, high losses, and insufficient stability. Therefore, a new quartz crucible structure is urgently needed that can effectively improve cleaning efficiency, reduce losses, and ensure the stability of the molten silicon liquid, thereby enhancing the production efficiency and quality of single crystal silicon.

[0005] Based on this background, this patent proposes an innovative quartz crucible design, which aims to solve the above technical problems through a modular structure, an elastic limit system and a collaborative positioning mechanism of the heating mechanism, and achieve the dual goals of efficient production and convenient maintenance. Utility Model Content

[0006] The purpose of the utility model is to provide a quartz crucible for a single crystal furnace, so as to solve the problems in the above background technology that traditional quartz crucibles are mostly integral structures, resulting in inconvenience in cleaning, high loss rate and inconvenience in component replacement.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a quartz crucible of a single crystal furnace, comprising a heating mechanism, the heating mechanism opening upward, a plurality of expansion grooves being provided inside the outer side of the upper end of the heating mechanism, a crucible upper part being provided inside the upper end of the heating mechanism, a crucible bottom being clamped inside the lower end of the crucible upper part, a lifting rod being provided on the lower side of the crucible bottom, and the lifting rod being slidably connected to the inner center of the lower end of the heating mechanism, a limiting support plate being provided at the lower end of the crucible bottom, and being connected to the lifting rod through the limiting support plate, a plurality of limiting claws being clamped on the outer side of the lower end of the heating mechanism, and being connected to the lifting rod through the plurality of limiting claws, and the plurality of limiting claws being rotatably connected to the inner upper side of the cylindrical outer wall of the lifting rod.

[0008] Preferably, the bottom of the crucible and the limiting support plate are clamped to each other through multiple limiting claws and multiple limiting protrusions, multiple limiting claws are opened on the outside of the center of the lower end of the bottom of the crucible, and multiple limiting protrusions are arranged on the outside of the center of the upper end of the limiting support plate, and are respectively clamped inside the multiple limiting claws.

[0009] Preferably, the center of the lower end of the limiting support plate is fixedly connected to a limiting groove, and the limiting groove is slidably connected to the inside of the center of the upper end of the lifting rod through an adjusting sliding hole, and the adjusting sliding hole is opened inside the center of the upper end of the lifting rod.

[0010] Preferably, a spring groove is opened inside the center of the lower end of the limiting groove, an assembly spring is provided inside the spring groove, and the limiting groove is elastically connected to the inside of the adjustment sliding hole through the assembly spring.

[0011] Preferably, the upper part of the crucible is clamped between multiple limiting claws through multiple limiting slots and multiple limiting blocks, and the multiple limiting slots are opened inside the lower side of the outer wall of the upper cylinder of the crucible. The multiple limiting blocks are fixedly connected to the upper side of the multiple limiting claws near one end of the upper part of the crucible, and are respectively clamped inside the multiple limiting slots.

[0012] Preferably, the limiting claw is rotatably connected to the lifting rod through a positioning groove, and the positioning groove is arranged inside the upper side of the cylindrical outer wall of the lifting rod, and the lower end of the positioning groove is connected to a telescopic sliding hole on the side away from the central axis of the lifting rod.

[0013] Preferably, an upward push slide rod is slidably connected to the inside of the telescopic slide hole, and the upper end of the upward push slide rod is hemispherical and fits tightly to the lower end of the limiting claw. An upward push spring is provided at the lower end of the upward push slide rod, and is elastically connected to the inside of the telescopic slide hole through the upward push spring.

[0014] Compared with the prior art, the present invention provides a quartz crucible for a single crystal furnace, which has the following beneficial effects:

[0015] 1. Modular quartz crucible structure: The quartz crucible is divided into a detachable crucible upper part and a crucible bottom. The two are assembled by snap-fitting, which facilitates internal cleaning and independent replacement of components, reducing overall loss.

[0016] 2. Elastic limit support plate system: The bottom of the crucible is connected to the limit support plate through the limit claws and limit protrusions. The lower end of the limit support plate is provided with a spring groove. The internal assembly spring makes the support plate elastically connected to the lifting rod, ensuring that the upper and bottom of the crucible fit tightly during assembly and improving stability.

[0017] 3. Limiting claws and rotation positioning mechanism: The upper part of the crucible is fixed between the limiting claws through the limiting slot and the limiting block. The claws are rotatably connected to the lifting rod through the rotating slot, and cooperate with the push-up slide rod and the push-up spring to automatically adjust the position and fix the upper part of the crucible.

[0018] 4. Coordinated positioning of the heating mechanism and the limiting claw: The inner wall of the lower end of the heating mechanism limits the position of the limiting claw to prevent it from rotating outward, ensuring the stable fixation of the upper part of the crucible and protecting the elastic element from high temperature damage.

[0019] 5. Convenient cleaning and maintenance: By raising the lifting rod, the restriction of the heating mechanism on the limit claws is released, so that the upper part of the crucible can be smoothly taken out from between the claws, which is convenient for internal cleaning and independent replacement of parts, improving maintenance efficiency and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the quartz crucible of the single crystal furnace of the present utility model.

[0021] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the quartz crucible of the single crystal furnace of the present utility model.

[0022] Figure 3 This is a schematic diagram of the connection structure of the limiting protrusion of the utility model.

[0023] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the lifting rod of the utility model.

[0024] Figure 5 This is a schematic diagram of the push-up slide rod connection structure of the utility model.

[0025] In the figure: 1. Heating mechanism; 2. Expansion tank; 3. Upper part of crucible; 4. Bottom of crucible; 5. Lifting rod; 6. Limiting support plate; 7. Limiting claw; 8. Limiting protrusion; 9. Limiting groove; 10. Adjusting slide hole; 11. Spring groove; 12. Assembly spring; 13. Limiting slot; 14. Limiting block; 15. Adjusting rotating slot; 16. Telescopic slide hole; 17. Push-up slide rod; 18. Push-up spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The utility model provides Figure 1-Figure 5The quartz crucible of a single crystal furnace shown in the figure includes a heating mechanism 1, which opens upward, and a plurality of expansion slots 2 are opened inside the outer side of the upper end of the heating mechanism 1, a crucible upper part 3 is arranged inside the upper end of the heating mechanism 1, and a crucible bottom 4 is clamped inside the lower end of the crucible upper 3, and a lifting rod 5 is arranged on the lower side of the crucible bottom 4, and the lifting rod 5 is slidably connected to the center of the lower end of the heating mechanism 1, and a limiting support plate 6 is provided at the lower end of the crucible bottom 4, and is connected to the lifting rod 5 through the limiting support plate 6, a plurality of limiting claws 7 are clamped on the outside of the lower end of the heating mechanism 1, and are connected to the lifting rod 5 through a plurality of limiting claws 7, and the plurality of limiting claws 7 are rotatably connected to the upper side of the cylindrical outer wall of the lifting rod 5. In the production of photovoltaic single crystal silicon, the single crystal furnace contains molten silicon liquid through the quartz crucible, and rotates and pulls the single crystal Silicon seed crystals are used to produce single crystal silicon. Since the quartz crucible is assembled from the crucible upper part 3 and the crucible bottom 4, when producing single crystal silicon, the crucible bottom 4 is first clamped to the upper end of the limiting support plate 6, and then the crucible upper part 3 is clamped between multiple limiting claws 7, and the crucible upper part 3 and the crucible bottom 4 are clamped to each other, so as to assemble a complete quartz crucible. After the assembly is completed, the lifting rod 5 slides downward to allow the complete quartz crucible and the silicon block inside to enter the upper end of the heating mechanism 1, and the silicon block inside the quartz crucible is heated and melted by the heating mechanism 1. The quartz crucible assembled by the crucible upper part 3 and the crucible bottom 4 can be disassembled, which is more convenient for internal cleaning, and the crucible upper part 3 and the crucible bottom 4 can be replaced separately, which can effectively reduce the loss of the quartz crucible.

[0028] Preferably, the crucible bottom 4 and the limiting support plate 6 are clamped with each other through multiple limiting claws 7 and multiple limiting protrusions 8. Multiple limiting claws 7 are opened on the outside of the center of the lower end of the crucible bottom 4, and multiple limiting protrusions 8 are set on the outside of the center of the upper end of the limiting support plate 6 and are respectively clamped inside the multiple limiting claws 7. The center of the lower end of the limiting support plate 6 is fixedly connected to the limiting groove 9, and the limiting groove 9 is slidably connected to the inside of the upper end center of the lifting rod 5 through the adjustment slide hole 10, and the adjustment slide hole 10 is opened inside the center of the upper end of the lifting rod 5. A spring groove 11 is opened inside the lower end center of the limiting groove 9, and an assembly spring 12 is provided inside the spring groove 11, and the limiting groove 9 is elastically connected to the inside of the adjustment slide hole 10 through the assembly spring 12. During the process of assembling the crucible upper part 3 and the crucible bottom 4 When the upper portion 3 of the crucible is pressed down and clamped between the plurality of limiting claws 7, the bottom 4 of the crucible is clamped into the lower end of the upper portion 3 of the crucible. At the same time, the upper portion 3 of the crucible pushes the bottom 4 of the crucible downward, and the limiting support plate 6 and the limiting groove 9 slide downward together, and make the lower end of the limiting support plate 6 fit against the upper end of the lifting rod 5, so that the upper portion 3 of the crucible and the bottom 4 of the crucible can be tightly assembled together under the action of the assembly spring 12, and the fit between the lifting rod 5 and the limiting support plate 6 can limit the position of the bottom 4 of the crucible, so that the bottom 4 of the crucible cannot continue to move between the upper portion 3 of the crucible and the lifting rod 5, thereby ensuring the stability of the assembly between the upper portion 3 of the crucible and the bottom 4 of the crucible.

[0029] Preferably, the crucible upper part 3 is clamped between the multiple limiting claws 7 through multiple limiting slots 13 and multiple limiting blocks 14. The multiple limiting slots 13 are opened inside the lower side of the cylindrical outer wall of the crucible upper part 3. The multiple limiting blocks 14 are fixedly connected to the multiple limiting claws 7 near the upper side of one end of the crucible upper part 3 and are respectively clamped inside the multiple limiting slots 13. The limiting claws 7 are rotatably connected to the lifting rod 5 through the positioning groove 15, and the positioning groove 15 is opened inside the upper side of the cylindrical outer wall of the lifting rod 5. The lower end of the positioning groove 15 is connected to the side away from the central axis of the lifting rod 5 with a telescopic sliding hole 16. The telescopic sliding hole 16 is slidably connected with an upper push slide rod 17, and the upper end of the upper push slide rod 17 is hemispherically set and fits tightly with the lower end of the limiting claw 7. The lower end of the upper push slide rod 17 is provided with an upper push spring 18 and is elastically connected by the upper push spring 18 When the lifting rod 5 slides downward and the quartz crucible slides into the upper end of the heating mechanism 1, the outer wall of the lower end of the limiting claw 7 is tightly fitted on the inner wall of the lower end of the heating mechanism 1, thereby limiting the position of the limiting claw 7, so that the limiting claw 7 can no longer rotate outward, so that the crucible upper part 3 can be stably fixed between the multiple limiting claws 7.

[0030] Preferably, since the assembly spring 12 and the push-up spring 18 are both located on the lower side of the heating mechanism 1 after the lifting rod 5 slides downward, when the quartz crucible is heated, it can effectively prevent high temperature from causing damage to the assembly spring 12 and the push-up spring 18, thereby ensuring the structural stability of the assembly spring 12 and the push-up spring 18.

[0031] Preferably, when cleaning the inside of the quartz crucible, the lifting rod 5 can be raised to release the position restriction of the limit claws 7 on the inner wall of the lower end of the heating mechanism 1, so that the upper part 3 of the crucible can be smoothly clamped out from between the multiple limit claws 7 and separated from the bottom 4 of the crucible, which is convenient for cleaning and slag removal inside the quartz crucible, reduces the difficulty of cleaning, and improves the cleaning efficiency. It also allows the upper part 3 of the crucible and the bottom 4 of the crucible to be replaced separately according to their respective degrees of damage, thereby reducing the overall loss of the quartz crucible.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A quartz crucible for a single crystal furnace, characterized in that: The invention comprises a heating mechanism (1), wherein the heating mechanism (1) opens upward, and a plurality of expansion slots (2) are provided inside the outer side of the upper end of the heating mechanism (1), a crucible upper part (3) is provided inside the upper end of the heating mechanism (1), a crucible bottom (4) is clamped inside the lower end of the crucible upper part (3), a lifting rod (5) is provided on the lower side of the crucible bottom (4), and the lifting rod (5) is slidably connected inside the center of the lower end of the heating mechanism (1), a limiting support plate (6) is provided at the lower end of the crucible bottom (4), and is connected to the lifting rod (5) through the limiting support plate (6), a plurality of limiting claws (7) are clamped outside the lower end of the heating mechanism (1), and are connected to the lifting rod (5) through the plurality of limiting claws (7), and the plurality of limiting claws (7) are rotatably connected inside the upper side of the cylindrical outer wall of the lifting rod (5).

2. The quartz crucible for a single crystal furnace according to claim 1, wherein: The crucible bottom (4) and the limiting support plate (6) are mutually clamped by a plurality of limiting claws (7) and a plurality of limiting protrusions (8), wherein the plurality of limiting claws (7) are arranged outside the center of the lower end of the crucible bottom (4), and the plurality of limiting protrusions (8) are arranged outside the center of the upper end of the limiting support plate (6) and are respectively clamped inside the plurality of limiting claws (7).

3. The quartz crucible for a single crystal furnace according to claim 2, wherein: The center of the lower end of the limiting support plate (6) is fixedly connected to the limiting groove (9), and the limiting groove (9) is slidably connected to the interior of the center of the upper end of the lifting rod (5) through the adjusting sliding hole (10), and the adjusting sliding hole (10) is opened inside the center of the upper end of the lifting rod (5).

4. The quartz crucible for a single crystal furnace according to claim 3, wherein: A spring groove (11) is provided at the center of the lower end of the limiting groove (9), an assembly spring (12) is provided inside the spring groove (11), and the limiting groove (9) is elastically connected to the inside of the adjustment sliding hole (10) via the assembly spring (12).

5. The quartz crucible for a single crystal furnace according to claim 1, characterized in that: The crucible upper part (3) is clamped between the plurality of limiting claws (7) through a plurality of limiting slots (13) and a plurality of limiting blocks (14); the plurality of limiting slots (13) are arranged inside the lower side of the cylindrical outer wall of the crucible upper part (3); the plurality of limiting blocks (14) are fixedly connected to the upper side of the plurality of limiting claws (7) near one end of the crucible upper part (3), and are respectively clamped inside the plurality of limiting slots (13).

6. The quartz crucible for a single crystal furnace according to claim 5, characterized in that: The limiting claw (7) is rotatably connected to the lifting rod (5) via a position adjustment groove (15), and the position adjustment groove (15) is provided inside the upper side of the cylindrical outer wall of the lifting rod (5). The lower end of the position adjustment groove (15) is connected to a telescopic sliding hole (16) on the side away from the central axis of the lifting rod (5).

7. The quartz crucible for a single crystal furnace according to claim 6, characterized in that: The telescopic sliding hole (16) is slidably connected to an upward push slide rod (17), and the upper end of the upward push slide rod (17) is hemispherical and fits tightly against the lower end of the limit claw (7). The lower end of the upward push slide rod (17) is provided with an upward push spring (18) and is elastically connected to the telescopic sliding hole (16) through the upward push spring (18).

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