CN214400796U - Guide cylinder - Google Patents
Guide cylinder Download PDFInfo
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- CN214400796U CN214400796U CN202022654416.9U CN202022654416U CN214400796U CN 214400796 U CN214400796 U CN 214400796U CN 202022654416 U CN202022654416 U CN 202022654416U CN 214400796 U CN214400796 U CN 214400796U
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- inner tube
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Abstract
The utility model discloses a draft tube, which comprises an outer tube and an inner tube arranged in the outer tube in a penetrating way, wherein the inner tube comprises an upper inner tube and a lower inner tube, the upper inner tube and the lower inner tube are quartz tubes with openings at two ends, the inner tube also comprises a transition part butted between the upper inner tube and the lower inner tube, a material through hole for materials to enter the lower inner tube from the upper inner tube is arranged on the transition part, and a step for bearing a water-cooling screen is formed at the joint of the upper inner tube and the transition part; the quartz cylinder is used as the inner cylinder of the guide cylinder, the probability that the guide cylinder is contacted with the single crystal raw material is reduced, the probability that the content of the single crystal silicon carbon exceeds the standard is effectively controlled, a step for bearing the water-cooling screen is formed between the upper inner cylinder and the lower inner cylinder of the inner cylinder through the arrangement of the transition part, the water-cooling screen can be supported through the design of the split structure and the transition part, the heat dissipated when the crystal rod is pulled can be accelerated, and the pulling speed is improved.
Description
Technical Field
The utility model relates to a single crystal growing furnace accessory field, concretely relates to draft tube.
Background
The content of carbon impurities is one of important electrical performance indexes of the single crystal, and the carbon impurities in the single crystal can promote defect formation and influence the conversion efficiency of the single crystal battery. At present, battery manufacturers have higher requirements on the content of carbon impurities in single crystals, but few single crystal manufacturers can achieve the requirements. The effective segregation coefficient of the carbon impurities in the silicon is 0.07, and the carbon impurities are distributed in the single crystal and have low heads and high tails, so that the monitoring of the content of the carbon impurities is mainly carried out on the tail of the single crystal.
The use of high quality raw materials does reduce the carbon impurity content in the single crystal, but raises the price of the raw materials, and causes the overall cost to rise. At present, a mode of one furnace with multiple rods is usually adopted when single crystal is pulled, feeding is needed after one rod is pulled for pulling the next rod, raw materials are accumulated on an inner guide cylinder in the feeding process to cause carbon scratch and carbon contamination, and the content of carbon impurities in the single crystal is increased.
At present, the probability that the content of silicon and carbon in single crystal exceeds the standard is controlled by replacing the inside of the guide cylinder with quartz material so as to reduce the probability that the guide cylinder made of graphite is contacted with the single crystal raw material, but the quartz material has high processing difficulty and cannot be bent or manufactured into a complex structure, and the guide cylinder which is contacted with the single crystal raw material and is made of full quartz material is difficult to accommodate a water-cooling screen.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is: a draft tube is provided.
The technical scheme of the utility model is that: the utility model provides a draft tube, includes the urceolus and wears to establish inner tube in the urceolus, the inner tube includes upper portion inner tube and lower part inner tube, upper portion inner tube and lower part inner tube are both ends open-ended quartz cylinder, the inner tube still include the butt in transition portion between upper portion inner tube and the lower part inner tube, seted up in the transition portion and supplied the material to follow get into in the upper portion inner tube the logical material mouth in the lower part inner tube, the upper portion inner tube with the department of meeting of transition portion forms the step that is used for the bearing water-cooling screen.
In some preferred embodiments, the outer cylinder is a hollow cylinder structure with two open ends, and the inner cylinder is an inverted hollow truncated cone structure.
In some preferred embodiments, the outer cylinder and the inner cylinder have the same shape, and a gap is arranged between the outer cylinder and the inner cylinder, and the gap is filled with a heat insulation layer.
In some preferred embodiments, the outer cylinder has a first end and a second end which are oppositely arranged, and the first end extends in a direction away from the axial center of the outer cylinder to form a first extending part; the upper inner cylinder is provided with a third end and a fourth end which are arranged oppositely, the third end extends to the direction of the axis far away from the upper inner cylinder to form a third extension part, and the first extension part is abutted with the third extension part to support the third extension part.
In some preferred embodiments, the second end extends toward the axial center of the outer cylinder to form a second extending portion, the lower inner cylinder has a fifth end and a sixth end that are opposite to each other, the fifth end abuts against the transition portion, and the sixth end abuts against the second extending portion.
In some preferred embodiments, an end surface of the fourth end abuts against an end surface of the transition portion to form the step, and the step supports a water screen located in the inner cavity of the upper inner cylinder.
In some preferred embodiments, the water-cooling screen is cylindrical, and the outer wall of the water-cooling screen is attached to the inner cavity of the upper inner cylinder.
In some preferred embodiments, the opening at the end where the lower inner cylinder and the transition part are connected and the material passing opening are both circular, and the diameter of the opening at the end where the lower inner cylinder and the transition part are connected is greater than or equal to the diameter of the material passing opening.
In some preferred embodiments, an opening of the water-cooling screen at the end where the water-cooling screen is connected with the transition part is circular, and the diameter of the opening at the end where the water-cooling screen is connected with the transition part is smaller than or equal to the diameter of the feed opening.
In some preferred embodiments, the insulation layer comprises a soft felt.
Compared with the prior art, the utility model has the advantages that: providing a guide cylinder, which comprises an outer cylinder and an inner cylinder penetrating through the outer cylinder, wherein the inner cylinder comprises an upper inner cylinder and a lower inner cylinder, the upper inner cylinder and the lower inner cylinder are quartz cylinders with openings at two ends, the inner cylinder further comprises a transition part abutting against the upper inner cylinder and the lower inner cylinder, the transition part is provided with a material inlet for feeding materials into the lower inner cylinder from the upper inner cylinder, and a step for bearing a water-cooled screen is formed at the joint of the upper inner cylinder and the transition part; the quartz cylinder is used as the inner cylinder of the guide cylinder, the probability that the guide cylinder is contacted with the single crystal raw material is reduced, the probability that the content of the single crystal silicon carbon exceeds the standard is effectively controlled, a step for bearing the water-cooling screen is formed between the upper inner cylinder and the lower inner cylinder of the inner cylinder through the arrangement of the transition part, the water-cooling screen can be supported through the design of the split structure and the transition part, the heat dissipated when the crystal rod is pulled can be accelerated, and the pulling speed is improved.
Drawings
The invention will be further described with reference to the following drawings and examples:
fig. 1 is a schematic structural view of a draft tube provided in embodiment 2;
wherein: 1. an outer cylinder; 1a, a first extension part; 1b, a second extension; 2. an inner barrel; 2a, an upper inner cylinder; 2a1, a third extension; 2b, a lower inner cylinder; 3. a transition section; 4. a water-cooled screen; 5. and (7) an insulating layer.
Detailed Description
Example 1: the embodiment provides a draft tube, refer to fig. 1, including urceolus 1 and wear to establish inner tube 2 in the urceolus 1, inner tube 2 includes upper portion inner tube 2a and lower part inner tube 2b, upper portion inner tube 2a and lower part inner tube 2b are both the quartz capsule of both ends open-ended, inner tube 2 still includes the butt in transition portion 3 between upper portion inner tube 2a and lower part inner tube 2b, set up on transition portion 3 and supply the material to get into from in the upper portion inner tube 2a the material through-put mouth in the lower part inner tube 2b, the department of meeting of upper portion inner tube 2a with transition portion 3 forms the step that is used for bearing water-cooling screen 4.
The utility model discloses do not do specifically injecing with the shape to the material of transition portion 3, as long as can realize the stable bearing and the material of water-cooling screen 4 can at the smooth passing through between upper portion inner tube 2a and lower part inner tube 2 b. In the present embodiment, the transition portion 3 is preferably a graphite ring, and both end surfaces of the graphite ring are respectively in contact with the upper inner cylinder 2a and the lower inner cylinder 2b to prevent the gap from affecting the temperature and the escape of the material in the draft tube.
Preferably, in this embodiment, the outer cylinder 1 is a hollow cylinder structure with two open ends, the inner cylinder 2 is an inverted hollow circular truncated cone structure, a stable gap is naturally formed between the outer cylinder 1 and the inner cylinder 2 after installation, so that a heat insulation layer is conveniently arranged in the subsequent process, preferably, the inner walls of the upper inner cylinder 2a and the lower inner cylinder 2b are inclined, so that the material can slide down to prevent the material from being accumulated in the inner cylinder 2, and in the crystal pulling process, the heat emitted by the crystal is radiated to the lower part of the inner cylinder 2 and refracted to the furnace cover of the single crystal furnace, so that the pulling speed is facilitated.
Preferably, in this embodiment, the outer cylinder 1 has a first end and a second end opposite to each other, and the first end extends in a direction away from the axial center of the outer cylinder 1 to form a first extending portion 1 a; the upper inner cylinder 2a has a third end and a fourth end which are oppositely arranged, the third end extends to the axial direction far away from the upper inner cylinder 2a to form a third extension part 2a1, and the first extension part 1a is abutted with the third extension part 2a1 to support the third extension part 2a 1.
More preferably, the second end extends toward the axial center of the outer cylinder 1 to form a second extending portion 1b, the lower inner cylinder 2b has a fifth end and a sixth end which are oppositely arranged, the fifth end is abutted with the transition portion 3, and the sixth end is abutted with the second extending portion 1 b.
More preferably, the end surface of the fourth end is in contact with the end surface of the transition part 3 to form the step, and the step is supported with the water-cooling screen 4 located in the inner cavity of the upper inner cylinder 2 a. The water-cooling screen 4 is used for taking away heat emitted by the crystal and improving the pulling speed.
More preferably, the water-cooling screen 4 is cylindrical, the outer wall of the water-cooling screen 4 is attached to the inner cavity of the upper inner cylinder 2a, the structure is more stable, and the contact area is increased by attaching the water-cooling screen 4 to the upper inner cylinder 2a, so that the heat dissipation effect is further improved.
More preferably, the opening of the connection end of the lower inner cylinder 2b and the transition portion 3 and the material passing port are both circular, and the diameter of the opening of the connection end of the lower inner cylinder 2b and the transition portion 3 is greater than or equal to the diameter of the material passing port, so that the material can smoothly pass through the material passing port and enter the lower inner cylinder 2b without being blocked by the edge of the opening of the connection end of the lower inner cylinder 2b and the transition portion 3.
More preferably, the opening of the connection end of the water-cooling screen 4 and the transition portion 3 is circular, the diameter of the opening of the connection end of the water-cooling screen 4 and the transition portion 3 is smaller than or equal to the diameter of the material passing port, that is, the inner diameter of the opening at the lower part of the water-cooling screen 4 is smaller than the inner diameter of the graphite ring, and the graphite ring is shielded by the lower part of the water-cooling screen 4 to prevent the single crystal raw material from contacting the graphite ring.
The utility model provides a pair of draft tube, the inner tube that adopts the quartz capsule as the draft tube reduces the probability that draft tube and single crystal raw materials contact exceed standard with the probability that effective control monocrystalline silicon carbon content to form the step that is used for bearing water-cooling screen through setting up transition portion between the upper and lower inner tube of inner tube, can bearing water-cooling screen through the design of components of a whole that can function independently structure and transition portion, thereby can accelerate the heat that gives off when drawing the crystal bar, improve the pulling rate.
Furthermore, when the transition portion supports the water-cooling screen, the material is prevented from being blocked when the material passes through the water-cooling screen and enters the lower inner cylinder, and the material is prevented from being accumulated in the inner cylinder.
Example 2: this example differs from example 2 in that: in this embodiment, the outer cylinder 1 and the inner cylinder 2 have the same shape, a gap is formed between the outer cylinder 1 and the inner cylinder 2, and a heat-insulating layer 5 is filled in the gap. Illustratively, the outer cylinder 1 and the inner cylinder 2 are both in a hollow cylinder structure or are both in an inverted hollow circular truncated cone structure.
It should be noted that in the description of the present invention, the terms "first", "second", "third", "fourth", "fifth" and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of indicated technical features. Thus, features defined as "first", "second", "third", "fourth", "fifth", "sixth" may explicitly or implicitly include one or more of the features.
Unless otherwise expressly stated or limited, the term "abut" is defined as being only in a positional relationship and is to be construed broadly, e.g., as being either a fixed connection or a removable connection. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above-mentioned embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the present invention shall be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a draft tube, its characterized in that includes the urceolus and wears to establish inner tube in the urceolus, the inner tube includes upper portion inner tube and lower part inner tube, upper portion inner tube and lower part inner tube are both ends open-ended quartz cylinder, the inner tube still include the butt in transition portion between upper portion inner tube and the lower part inner tube, seted up in the transition portion and supplied the material to follow get into in the upper portion inner tube the logical material mouth in the lower part inner tube, the upper portion inner tube with the department of meeting of transition portion forms the step that is used for bearing water-cooling screen.
2. The draft tube according to claim 1, wherein the outer tube is a hollow cylinder structure with two open ends, and the inner tube is an inverted hollow circular truncated cone structure.
3. The draft tube according to claim 1, wherein the outer tube and the inner tube have the same shape, a gap is formed between the outer tube and the inner tube, and the gap is filled with a heat insulation layer.
4. The draft tube according to claim 3, wherein the outer tube has a first end and a second end opposite to each other, the first end extending away from the axial center of the outer tube to form a first extension; the upper inner cylinder is provided with a third end and a fourth end which are arranged oppositely, the third end extends to the direction of the axis far away from the upper inner cylinder to form a third extension part, and the first extension part is abutted with the third extension part to support the third extension part.
5. The draft tube according to claim 4, wherein the second end extends toward the axial center of the outer tube to form a second extension, the lower inner tube has a fifth end and a sixth end opposite to each other, the fifth end abuts against the transition portion, and the sixth end abuts against the second extension.
6. The draft tube according to claim 4, wherein the end surface of the fourth end abuts against the end surface of the transition portion to form the step, and the step supports the water screen in the inner cavity of the upper inner tube.
7. The draft tube according to claim 6, wherein the water screen is cylindrical, and the outer wall of the water screen is attached to the inner cavity of the upper inner tube.
8. The draft tube according to claim 7, wherein the opening of the connecting end of the lower inner tube and the transition portion and the material passing opening are both circular, and the diameter of the opening of the connecting end of the lower inner tube and the transition portion is greater than or equal to the diameter of the material passing opening.
9. The guide shell according to claim 8, wherein an opening of the connection end of the water screen and the transition part is circular, and the diameter of the opening of the connection end of the water screen and the transition part is smaller than or equal to the diameter of the material feeding port.
10. The draft tube according to any one of claims 3 to 9, wherein the insulation layer comprises a soft felt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022654416.9U CN214400796U (en) | 2020-11-17 | 2020-11-17 | Guide cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022654416.9U CN214400796U (en) | 2020-11-17 | 2020-11-17 | Guide cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214400796U true CN214400796U (en) | 2021-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022654416.9U Active CN214400796U (en) | 2020-11-17 | 2020-11-17 | Guide cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN214400796U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114381795A (en) * | 2021-12-29 | 2022-04-22 | 宁夏申和新材料科技有限公司 | Water-cooled screen device of czochralski crystal growing furnace and single crystal growing furnace |
| CN114808115A (en) * | 2022-04-28 | 2022-07-29 | 晶科能源股份有限公司 | Liquid gap measuring method and liquid gap testing device |
-
2020
- 2020-11-17 CN CN202022654416.9U patent/CN214400796U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114381795A (en) * | 2021-12-29 | 2022-04-22 | 宁夏申和新材料科技有限公司 | Water-cooled screen device of czochralski crystal growing furnace and single crystal growing furnace |
| CN114808115A (en) * | 2022-04-28 | 2022-07-29 | 晶科能源股份有限公司 | Liquid gap measuring method and liquid gap testing device |
| CN114808115B (en) * | 2022-04-28 | 2023-08-15 | 晶科能源股份有限公司 | Liquid mouth distance measuring method and liquid mouth distance testing device |
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