CN104711672A - Polycrystalline ingot casting anti-arcing furnace crucible cover plate and use method thereof - Google Patents
Polycrystalline ingot casting anti-arcing furnace crucible cover plate and use method thereof Download PDFInfo
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- CN104711672A CN104711672A CN201510048125.6A CN201510048125A CN104711672A CN 104711672 A CN104711672 A CN 104711672A CN 201510048125 A CN201510048125 A CN 201510048125A CN 104711672 A CN104711672 A CN 104711672A
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- crucible
- arcing
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Abstract
A polycrystalline ingot casting anti-arcing furnace crucible cover plate comprises a square cover plate body, the square cover plate body is provided with a center hole and a vent hole, the center hole is arranged in the center of the square cover plate body, and four corners of the square cover plate body are provided with avoiding gaps. The avoiding gaps can be square, right angled isosceles triangular or right angle sectored in shape. The part of the four corners upward warping due to deformation, in contact with a top graphite heating plate, is cut off to form the gaps, so the contact of the crucible cover plate with a bolt on the top graphite heating plat due to bending deformation is avoided, an arching sparking phenomenon is avoided, and damages of arcing to an ingot casting furnace heating element are avoided. The cover plate disclosed in the invention has 3-6 month longer life, discarding of a graphite heater and the graphite bolt due to sparkling is avoided, and the safe stable production of an ingot casting furnace is guaranteed.
Description
Technical field:
The present invention relates to polycrystalline ingot furnace crucible, particularly relate to a kind of distortion-free polycrystalline ingot furnace crucible cover plate.
Background technology:
Sun power is green regenerative energy sources, and in effective utilization of sun power, solar photovoltaic utilization is the research field that development in recent years is fast, the most most active.Along with solar cell in recent years develop rapidly with constantly apply, market is increasing for the demand of solar cell.Crystal silicon solar energy battery is more and more applied to energy field, and wherein, silicon materials are main carriers of solar photovoltaic utilization, and the preparation of crystalline silicon is the basis of photovoltaic cell.
At present, preparing polycrystal silicon ingot is both at home and abroad adopt directional solidification process mostly, the method is prepared by a certain percentage by silicon material to be placed in crucible, then crucible put into directional solidification furnace heating, melting, produced and obtained polysilicon again by long brilliant, annealing, refrigerating work procedure.Fall in quartz crucible to prevent the carbon impurity above quartz crucible in graphite heater or other impurity, cause the polycrystal silicon ingot carbon foreign matter content of production and other foreign matter contents higher, simultaneously also in order to prevent liquid surface evaporation gaseous corrosion graphite heater, crucible cover plate is adopted to cover in the four blocks of crucible side guard plates upper shed outside quartz crucible.Along with being growing more intense of market competition, polycrystalline ingot furnace main trend is to save energy and reduce the cost, increase production capacity, so most of user selects to increase charging capacity.So quartz crucible when filling with substance, the piling height of silicon raw material can higher than quartz crucible, so the height of four blocks of crucible side guard plates outside quartz crucible generally can higher than the height of quartz crucible, thus the graphite heating plate close together at top in crucible cover plate and ingot furnace.Import or domestic polycrystalline ingot furnace are in operational process, because crucible cover plate directly covers on crucible side plate, increase charging capacity can compress the gas volume space in crucible, side air vent also often reduces, cause gas in crucible to discharge not smooth, air pressure becomes large, becomes large to the thermal shock stress of crucible cover plate, cause cover plate silicon liquid cooling but crystallisation stage internal stress cannot eliminate completely, long-time use accumulation several times after easily there is large flexural deformation.The crucible cover plate of distortion is that middle sinking corner is upturned, the threaded bolt contacts of corner easily and on the graphite heating plate of top, produce Arcing phenomenon, cause biphase current to be greater than 400A to report to the police, ingot furnace heating unit can be subject to badly damaged simultaneously, as: burning appears in graphite or carbon carbon bolt, graphite heating plate and crucible cover plate etc., also there will be graphite heater fracture time serious.The security of equipment can be greatly affected and the corresponding spare part of equipment must be changed, and diastrophic crucible cover plate also cannot re-use and scrap process, and its financial loss is huge.
Summary of the invention:
The invention provides a kind of polycrystalline cast ingot anti-arcing stove crucible cover plate, it directly contacts with bolt after preventing crucible cover plate to be out of shape, and causes Arcing phenomenon.
The technical solution adopted in the present invention is:
A kind of polycrystalline cast ingot anti-arcing stove crucible cover plate, it is characterized in that: comprise square cover board body, square cover board body is provided with centre hole and ventilating pit, and centre hole is opened in the center of square cover board body, is provided with dodges breach in square cover board body corner.
Further, dodging breach described in is that square, right angled isosceles triangle or right angle are fan-shaped.
Further, described in dodge breach for square, the length of side is the spacing of backplate outer side to crucible medial surface.
Further, described in dodge breach be right angle equilateral triangle, its length of side is the spacing of backplate outer side to crucible medial surface.
Further, described in dodge breach be that right angle is fan-shaped, the fan-shaped radius in right angle is the spacing of backplate outer side to crucible medial surface.
During use, the present invention is placed on the top of the quartz crucible that silicon material is housed, four edges aligns with the limit of quartz crucible, and what make four angles dodges breach to the bolt of living on the graphite heating plate of top.
Breach is dodged owing to being provided with at four of cover plate angles, originally the corner upwarped after cover plate distortion can be amputated with top graphite heating plate contact part, define and dodge breach, bolt on the graphite heating plate of such top just can not with four of a crucible cover plate angular contact, crucible cover plate can be stopped because of the threaded bolt contacts in flexural deformation and top graphite heating plate, Arcing phenomenon can not be produced, ingot furnace heating unit can be stopped because of arcing and damage phenomenon.By the enforcement of the technical program, extend 3 ~ 6 months before comparing duration of service of crucible cover plate, graphite heater and graphite bolt can not be scrapped because generation sparking, ensure that safety and the stably manufactured of ingot furnace.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention;
Fig. 2 is using state structural representation of the present invention;
Fig. 3 is the another kind of structural representation of the present invention;
In figure: 1-cover board body; 11-centre hole; 12-ventilating pit; 13-dodges breach.
Embodiment:
Specific embodiment of the invention scheme is described in detail below in conjunction with accompanying drawing:
Embodiment 1: a kind of polycrystalline cast ingot anti-arcing stove crucible cover plate, as shown in the figure, it comprises square cover board body 1, square cover board body 1 is provided with centre hole 11 and ventilating pit 12, centre hole 11 is opened in the center of square cover board body 1, is provided with dodges breach 13 square cover board body 1 four jiaos.Described dodge breach 13 for square, right angled isosceles triangle or right angle fan-shaped in any one, in this example, described in dodge breach 13 for square, the length of side is the spacing of backplate outer side to crucible medial surface.
Embodiment 2: difference from Example 1 is: described in dodge breach 13 for right angle equilateral triangle, its length of side is the spacing of backplate outer side to crucible medial surface.
Embodiment 3: difference from Example 1 is: described in dodge breach 13 for right angle fan-shaped, the fan-shaped radius in right angle is the spacing of backplate outer side to crucible medial surface.
Claims (6)
1. a polycrystalline cast ingot anti-arcing stove crucible cover plate, it is characterized in that: comprise square cover board body (1), square cover board body (1) is provided with centre hole (11) and ventilating pit (12), centre hole (11) is opened in the center of square cover board body (1), is provided with dodges breach (13) in square cover board body (1) corner.
2. polycrystalline cast ingot anti-arcing stove crucible cover plate according to claim 1, is characterized in that: described in dodge breach (13) for square, right angled isosceles triangle or right angle fan-shaped.
3. polycrystalline cast ingot anti-arcing stove crucible cover plate according to claim 2, is characterized in that: described in dodge breach (13) for square, the length of side is the spacing of backplate outer side to crucible medial surface.
4. polycrystalline cast ingot anti-arcing stove crucible cover plate according to claim 2, is characterized in that: described in dodge breach (13) for right angle equilateral triangle, its length of side is the spacing of backplate outer side to crucible medial surface.
5. polycrystalline cast ingot anti-arcing stove crucible cover plate according to claim 2, is characterized in that: described in dodge breach (13) for right angle fan-shaped, the fan-shaped radius in right angle is the spacing of backplate outer side to crucible medial surface.
6. the using method of the anti-arcing stove of polycrystalline cast ingot described in claim 1 crucible cover plate, it is characterized in that: during use, anti-for polycrystalline cast ingot arcing stove crucible cover plate is placed on the top of the quartz crucible that silicon material is housed, its four edges is alignd with the limit of quartz crucible, four angles dodge breach to the bolt of living on the graphite heating plate of top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510048125.6A CN104711672A (en) | 2015-01-29 | 2015-01-29 | Polycrystalline ingot casting anti-arcing furnace crucible cover plate and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510048125.6A CN104711672A (en) | 2015-01-29 | 2015-01-29 | Polycrystalline ingot casting anti-arcing furnace crucible cover plate and use method thereof |
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| Publication Number | Publication Date |
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| CN104711672A true CN104711672A (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510048125.6A Pending CN104711672A (en) | 2015-01-29 | 2015-01-29 | Polycrystalline ingot casting anti-arcing furnace crucible cover plate and use method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821475A (en) * | 2016-06-06 | 2016-08-03 | 晶科能源有限公司 | Crucible cover plate |
| CN106048717A (en) * | 2016-07-20 | 2016-10-26 | 湖南红太阳光电科技有限公司 | Crucible cover plate for polycrystalline silicon ingot casting |
| CN109161961A (en) * | 2018-11-27 | 2019-01-08 | 晶科能源有限公司 | A kind of polycrystalline cast ingot crucible cover plate and preparation method thereof |
-
2015
- 2015-01-29 CN CN201510048125.6A patent/CN104711672A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821475A (en) * | 2016-06-06 | 2016-08-03 | 晶科能源有限公司 | Crucible cover plate |
| CN106048717A (en) * | 2016-07-20 | 2016-10-26 | 湖南红太阳光电科技有限公司 | Crucible cover plate for polycrystalline silicon ingot casting |
| CN106048717B (en) * | 2016-07-20 | 2019-07-26 | 湖南红太阳光电科技有限公司 | A kind of crucible used for polycrystalline silicon ingot casting cover board |
| CN109161961A (en) * | 2018-11-27 | 2019-01-08 | 晶科能源有限公司 | A kind of polycrystalline cast ingot crucible cover plate and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150617 |