Graphite thermal field protective disc tablet
By designing the graphite thermal field protective plate press of the splicing structure and the joints, the existing protective plate press lacks insulation ability and silicon solution leakage is solved, and more efficient insulation and leakage prevention effects are achieved, improving the efficiency and cost-effectiveness of single crystal silicon production.
Patent Information
- Application Number
- CN202421655573.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The existing protective plates lack thermal insulation ability, and silicon solution leaks are prone to occur at the through holes, resulting in reduced heating effect and corrosion of the bottom parts of the single-crystal furnace.
A graphite thermal field protective plate is designed, using splicing structures and clamping parts to form a cavity where heat insulation materials can be placed, increase insulation capacity, and prevent leakage of silicon solution through sinker and deflector structures.
It improves the insulation performance of the protective plate, reduces heat loss and silicon solution leakage, extends service life, reduces production costs, and improves the efficiency of single crystal silicon production.
Smart Images
Figure CN222846887U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of disc protection pressing sheets, in particular to a graphite thermal field disc protection pressing sheet. Background Art
[0002] Monocrystalline silicon is a relatively active non-metallic element crystal. Its main uses are as a semiconductor material and for solar photovoltaic power generation and heating. When producing and manufacturing monocrystalline silicon, a graphite heat field is required to melt the monocrystalline silicon. The graphite heat field is mainly composed of a crucible. Insulation materials are arranged around and at the bottom of the heat field to insulate the heat field. A disc guard is arranged on the insulation material at the bottom. The existing disc guard has a thin sheet structure. During use, the disc guard has cracking and deformation problems, which requires frequent replacement of the disc guard, resulting in high production costs.
[0003] For example, the patent with patent announcement number CN 218932377 U records a furnace bottom protection plate pressing sheet and a single crystal silicon heating furnace. However, the protection plate pressing sheet only plays the role of protecting the thermal insulation material and has no thermal insulation ability, which will reduce the heating effect and easily cause silicon solution leakage at the through hole, causing corrosion to other components at the bottom of the single crystal furnace.
[0004] Based on this, a graphite thermal field protection disc pressing sheet is now provided, which can eliminate the disadvantages of the existing technical solutions. Utility Model Content
[0005] The utility model aims to provide a graphite thermal field shielding plate pressing sheet to solve the problems in the background technology that the shielding plate pressing sheet has no heat preservation ability and silicon solution leakage is easy to occur at the through hole.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A graphite thermal field shield plate, comprising a shield plate body and a shield plate cover, wherein the shield plate body is configured as a circular thin plate structure, the shield plate cover is clamped and arranged above the shield plate body, the shield plate body is composed of a plurality of splicing pieces spliced together by clamping parts, one side of each splicing piece is provided with an arc groove, a heat preservation groove is provided at the lower end of the shield plate cover, and a cavity for placing a heat insulating material is formed between the shield plate cover and the shield plate body.
[0008] Preferably, the clamping member comprises a limiting plate and a limiting groove, the limiting plate and the limiting groove are matched in size and number, the limiting plate is symmetrically arranged on the upper surface of the splicing piece, and the limiting groove is arranged on one side of the splicing piece.
[0009] Preferably, an insulation ring is provided at the lower end of the disc protection pressing plate body, the diameter of the insulation ring is equal to the diameter of the disc protection pressing plate body, a plurality of guide columns are fixedly connected to the upper surface of the insulation ring, and a plurality of guide grooves adapted to the guide columns are opened on the lower surface of the splicing plate.
[0010] Preferably, a through hole for the crucible support rod to pass through is provided at the center of the upper cover of the plate protection press, and a placement groove is provided at the edge of the end surface of the through hole.
[0011] Preferably, an electrode hole for the electrode column to pass through is provided on one side of the splicing sheet, and a sink for containing the leaked silicon solution is provided at the edge of the electrode hole.
[0012] Preferably, the number of the splicing pieces is set to 4, the shape of the splicing pieces is set to a right-angle sector, and the splicing pieces are made of graphite.
[0013] Preferably, a guide plate is fixedly mounted on the outer side of the splicing piece, the thickness of the guide plate gradually increases from top to bottom, and the cross-section of the guide plate is set to be a right triangle.
[0014] Preferably, the clamping member further comprises a protrusion and a groove arranged on opposite sides of two adjacent splicing pieces, and the protrusion and the groove are matched.
[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0016] 1. The utility model is provided with a spliced disc protection sheet structure, so that when part of the disc protection sheet is damaged, the damaged spliced sheet can be quickly replaced, and because the spliced sheet area is small, the thickness of the spliced sheet can be appropriately reduced, thereby improving the bottom thermal insulation performance, being more efficient and energy-saving, and the disc protection sheet body and the disc protection sheet upper cover are snap-connected, which is convenient for installation and disassembly, and improves the production effect of monocrystalline silicon to a certain extent;
[0017] 2. The utility model is provided with a clamping piece, and the limiting plate and the limiting groove are mutually restricted, so as to ensure the relative fixation of adjacent splicing pieces, reduce the gap between the splicing pieces, reduce the heat loss, and realize the rapid positioning and installation of the splicing pieces under the mutual cooperation of the protrusion and the groove;
[0018] 3. The utility model is provided with a sink and a placement tank, which can contain the leaked silicon solution to prevent the leakage of the silicon solution from corroding other parts at the bottom of the single crystal furnace. In addition, the protective plate pressing sheet is also provided with a guide plate structure, which can drain the leaked silicon solution. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the disc protection pressing plate body of the utility model.
[0020] Figure 2 It is a schematic diagram of the structure of the disc protection and pressing plate body after being decomposed.
[0021] Figure 3 It is a schematic structural diagram of the splicing piece of the utility model when viewed from above.
[0022] Figure 4 It is a schematic structural diagram of the heat preservation ring of the utility model.
[0023] Figure 5 It is a structural schematic diagram of the disc protection and pressing plate upper cover of the utility model.
[0024] Figure 6 It is a schematic structural diagram of the upper cover of the disc protection pressing sheet of the utility model when viewed from above.
[0025] Figure 7 It is a sectional view of the front view of the utility model.
[0026] Figure 8 This is a schematic structural diagram of Example 2 of the present utility model.
[0027] Notes on the accompanying drawings: 1. disc guard pressing sheet body; 2. disc guard pressing sheet upper cover; 3. splicing sheet; 4. arc groove; 5. insulation groove; 6. cavity; 7. limit plate; 8. limit groove; 9. insulation ring; 10. guide column; 11. guide groove; 12. through hole; 13. placement groove; 14. electrode hole; 15. sink groove; 16. guide plate; 17. protrusion; 18. groove. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0029] In this embodiment, if Figure 1-Figure 7As shown, a graphite heat field shielding plate comprises a shielding plate body 1 and a shielding plate upper cover 2. The shielding plate body 1, the shielding plate upper cover 2 and the guide plate 16 are all made of carbon-carbon material. The carbon-carbon material has high strength and low thermal conductivity, plays a heat insulating role, and slows down the rate of heat transmission downward. The shielding plate body 1 is set as a circular thin disk structure. The surface of the shielding plate body 1 can be provided with a graphite insulation felt material, thereby reducing the contact area between the shielding plate and the graphite heat field structure, and playing a heat insulating role. The shielding plate upper cover 2 is clamped and arranged above the shielding plate body 1. The shielding plate upper cover 2 is a hollow cylindrical structure. The plate-protecting pressing sheet body 1 is composed of a plurality of splicing sheets 3 spliced together by a clamping piece, and an arc groove 4 is arranged on one side of the splicing sheet 3, and the arc groove 4 is used to place the plate-protecting pressing sheet upper cover 2, and a heat preservation groove 5 is opened at the lower end of the plate-protecting pressing sheet upper cover 2, and a cavity 6 for placing a heat-insulating material is formed between the plate-protecting pressing sheet upper cover 2 and the plate-protecting pressing sheet body 1, and a soft or solidified heat-insulating material is filled inside the cavity 6, so that the plate-protecting pressing sheet body 1 can not only protect the heat-insulating material below it, but also increase the heat-insulating function of the plate-protecting pressing sheet body 1 itself, so as to better improve the heat-insulating function of the bottom of the thermal field and improve the utilization rate of the heat energy of the thermal field;
[0030] Among them Figure 2 and Figure 3 As shown, the clamping member includes a limiting plate 7 and a limiting groove 8. The size and quantity of the limiting plate 7 and the limiting groove 8 are adapted. The limiting plate 7 is symmetrically arranged on the upper surface of the splicing piece 3, and the limiting groove 8 is arranged on one side of the splicing piece 3, so as to facilitate splicing two adjacent splicing pieces 3 together and increase the structural stability.
[0031] Among them Figure 3 and Figure 4 As shown, a heat preservation ring 9 is provided at the lower end of the plate-protecting pressing sheet body 1, and the diameter of the heat preservation ring 9 is equal to the diameter of the plate-protecting pressing sheet body 1. A plurality of guide posts 10 are fixedly connected to the upper surface of the heat preservation ring 9, and the number of the guide posts 10 is several. The guide posts 10 are arranged in a circular array on one side of the heat preservation ring 9, and no guide posts 10 are provided at the joint of the splicing piece 3. The diameter of the guide posts 10 is equal to the diameter of the guide grooves 11. A plurality of guide grooves 11 adapted to the guide posts 10 are provided on the lower surface of the splicing piece 3. After the heat preservation material is placed at the bottom of the hot field, the heat preservation ring 9 is then put on the heat preservation material, and finally the guide grooves 11 of the splicing piece 3 are aligned with the guide posts 10, and then the plate-protecting pressing sheet body 1 can be installed;
[0032] Among them Figure 1 , Figure 5 and Figure 6 As shown, the center of the upper cover 2 of the protective disc press is provided with a through hole 12 for the crucible support rod to pass through, and the edge of the end surface of the through hole 12 is provided with a placement groove 13. The surface of the graphite thermal field protective disc press is also provided with two air guide holes;
[0033] Among them Figure 2 and Figure 3 As shown, an electrode hole 14 for the electrode column to pass through is opened on one side of the splicing sheet 3, and a sink 15 for containing the leaked silicon solution is provided at the edge of the electrode hole 14. The number of electrode holes 14 is 4, and each of the electrode holes 14 is symmetrically arranged about the center of the protective disc pressing sheet body 1, and the air guide hole and the electrode hole 14 are respectively arranged along a pitch circle, and each pitch circle is arranged concentrically with the protective disc pressing sheet body 1;
[0034] Among them Figure 1-Figure 3 As shown, the number of splicing pieces 3 is set to 4, the shape of the splicing pieces 3 is set to a right-angle sector, and the splicing pieces 3 are set to graphite material. When part of the splicing pieces 3 of the disc protection pressing piece body 1 is damaged, the damaged splicing pieces 3 can be replaced according to the damaged area, and the dispersed splicing pieces 3 are less likely to break or break than the one-piece disc protection pressing piece, thereby extending the service life of the disc protection pressing piece and reducing the replacement frequency;
[0035] Among them Figure 7 As shown, a guide plate 16 is fixedly installed on the outside of the splicing sheet 3, the thickness of the guide plate 16 gradually increases from top to bottom, the cross section of the guide plate 16 is set to a right triangle, the disc guard sheet body 1 and the guide plate 16 are an integrated structure, and the guide plate 16 adopts an epitaxial guide design to prevent the silicon solution from entering the insulation ring 9 along the disc guard sheet body 1 and then damaging other equipment, thereby avoiding the loss of thermal field components and reducing the probability of accidents;
[0036] The difference from Example 1 is that Figure 8 As shown, the clamping member further includes a protrusion 17 and a groove 18 arranged on opposite sides of two adjacent splicing pieces 3 , and the protrusion 17 and the groove 18 are adapted to each other for better fitting and increasing the tightness between the adjacent splicing pieces 3 .
[0037] When in use, first place the insulation material at the bottom of the hot field, then assemble several splicing pieces 3 through the snap-fit parts, after the assembly is completed, place the disc protection pressing sheet body 1 above the insulation ring 9, align the guide groove 11 with the guide column 10 to achieve the fixing operation of the disc protection pressing sheet body 1 and the insulation ring 9, and then snap-fit the disc protection pressing sheet upper cover 2 with the arc groove 4. The structure is simple, and when the disc protection pressing sheet body 1 is broken, it is convenient to replace the broken splicing piece 3, and the practicality is good.
[0038] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A graphite thermal field shielding plate, comprising a shielding plate body (1) and a shielding plate upper cover (2), wherein the shielding plate body (1) is configured as a circular thin plate structure, and the shielding plate upper cover (2) is snap-fitted and arranged above the shielding plate body (1), characterized in that: The plate protection pressing sheet body (1) is composed of a plurality of splicing sheets (3) spliced together by means of a clamping piece, one side of each splicing sheet (3) is provided with an arc groove (4), a heat preservation groove (5) is provided at the lower end of the plate protection pressing sheet upper cover (2), and a cavity (6) for placing a heat insulation material is formed between the plate protection pressing sheet upper cover (2) and the plate protection pressing sheet body (1).
2. The graphite thermal field shielding plate according to claim 1, characterized in that: The clamping member comprises a limit plate (7) and a limit groove (8); the limit plate (7) and the limit groove (8) are matched in size and number; the limit plate (7) is symmetrically arranged on the upper surface of the splicing piece (3); and the limit groove (8) is arranged on one side of the splicing piece (3).
3. The graphite thermal field shielding plate according to claim 1, characterized in that: A heat preservation ring (9) is arranged at the lower end of the plate protection pressing plate body (1), the diameter of the heat preservation ring (9) is equal to the diameter of the plate protection pressing plate body (1), a plurality of guide columns (10) are fixedly connected to the upper surface of the heat preservation ring (9), and a plurality of guide grooves (11) adapted to the guide columns (10) are arranged on the lower surface of the splicing plate (3).
4. The graphite thermal field shielding plate according to claim 1, characterized in that: A through hole (12) for the crucible support rod to pass through is provided at the center of the plate protection pressing plate upper cover (2), and a placement groove (13) is provided at the end surface edge of the through hole (12).
5. The graphite thermal field shielding plate according to claim 1, characterized in that: An electrode hole (14) for an electrode column to pass through is provided on one side of the splicing sheet (3), and a sink (15) for containing leaked silicon solution is provided at the edge of the electrode hole (14).
6. The graphite thermal field shielding plate according to claim 1, characterized in that: The number of the splicing pieces (3) is set to 4, the shape of the splicing pieces (3) is set to be a right-angle sector, and the splicing pieces (3) are made of graphite.
7. The graphite thermal field shielding plate according to claim 1, characterized in that: A guide plate (16) is fixedly mounted on the outer side of the splicing plate (3); the thickness of the guide plate (16) gradually increases from top to bottom; and the cross section of the guide plate (16) is set to be a right triangle.
8. The graphite thermal field shielding plate according to claim 2, characterized in that: The clamping member further comprises a protrusion (17) and a groove (18) which are arranged on opposite sides of two adjacent splicing sheets (3), and the protrusion (17) and the groove (18) are adapted to each other.