Nested heat-preservation solid felt for producing single crystal by Czochralski method

Abstract

The utility model discloses a nested thermal insulation solid felt for producing single crystals by a czochralski method, and particularly relates to the field of single crystal furnaces, the nested thermal insulation solid felt comprises a plurality of solid felt single pieces, the plurality of solid felt single pieces are vertically embedded to form the thermal insulation solid felt, a barrel cavity is formed in the middle of the thermal insulation solid felt, the top end of each solid felt single piece is provided with a caulking groove, and the caulking groove is of an annular structure. The embedded grooves and the embedded rings arranged on the felt fixing single pieces which are overlapped up and down are designed in an embedded mode, replacement and transportation are convenient, the height is easy to adjust, the bearing function is achieved, the heat preservation barrel made of carbon-carbon materials can be directly optimized, the heat field cost is greatly reduced, the embedded mode is adopted through splicing of the upper structure and the lower structure, and no gap exists. The problem of splicing heat leakage is solved, meanwhile, a soft felt is replaced by the solid felt, manual cutting is not needed, the labor cost is saved, the external dimension precision is high, shaping is easy, thermal field standardization is easy to achieve, the service life of the solid felt is prolonged, the use cost is reduced, heat preservation uniformity is high, and crystal pulling and power adjusting are easy.

Description

Technical Field

[0001] The utility model relates to the technical field of single crystal furnaces, and more specifically to a nested thermal insulation felt for producing single crystals by a Czochralski method. Background Art

[0002] At present, the insulation barrel in the CZ single crystal furnace is made of a carbon-carbon graphite insulation barrel wrapped with soft felt. The carbon-carbon graphite insulation barrel plays a supporting role, and the soft felt plays an insulation role. Among them, the mutual coordination between the upper, middle and lower insulation barrels is mainly achieved through the alignment of the internal carbon-carbon graphite insulation barrel's own slots, and the external soft felt is extruded to achieve the sealing and insulation effect. During the disassembly and assembly of the furnace, the insulation barrel needs to be fixed to the soft felt wrapped on the outside of the insulation barrel with the help of a mechanical arm or auxiliary rope for moving.

[0003] In the prior art, the invention patent disclosed in publication number CN116254594A discloses a single crystal furnace and a soft felt protection device for its insulation barrel, wherein the soft felt protection device for the insulation barrel includes: an upper protective cover, a middle protective cover and a lower protective cover; the upper protective cover is used to be installed and fixed on at least the outer peripheral wall of the upper insulation felt; the middle protective cover is used to be installed and fixed on at least the outer peripheral wall of the middle insulation felt; the lower protective cover is used to be installed and fixed on at least the outer peripheral wall of the lower insulation felt; the upper protective cover, the middle protective cover and the lower protective cover are provided with a transport structure. This solution wraps and fixes each insulation felt in the insulation barrel with a protective cover with a transport structure, so as to convert the transport of the insulation felt into the transport of the protective cover, thereby effectively protecting the soft felt from wear or damage, preventing the felt scraps from falling off and the loosening of the felt layer from affecting the cleanliness in the single crystal furnace, and ensuring the insulation performance of the insulation barrel.

[0004] However, in combination with the above-mentioned existing technologies and other existing Del solid felts, there are still defects. The direct pulling method for growing single crystals uses soft felt as the thermal insulation material, which has a short life, poor wrapping consistency and is difficult to standardize, is easily damaged during the disassembly and assembly process, and there are gaps in the soft felt after it is wrapped, resulting in heat leakage, which leads to a decrease in the thermal insulation of the thermal field, an increase in the power consumption of the furnace and an increase in the cost of pulling crystals. This is not conducive to cost reduction and efficiency improvement in the photovoltaic industry, and is not conducive to the overall disassembly and assembly of the thermal field. Therefore, a nested thermal insulation solid felt for producing single crystals by the direct pulling method is proposed. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a nested thermal insulation felt for producing single crystals by the Czochralski method, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nested thermal insulation felt for producing single crystals by the Czochralski method, comprising a single felt piece, a plurality of the single felt pieces being embedded in each other up and down to form a thermal insulation felt, a barrel cavity being formed in the middle of the thermal insulation felt.

[0007] The method comprises the following steps: a first step is to place a felt piece on the heat preservation barrel with an embedding ring as the bottom, and then another felt piece is put on the heat preservation barrel again, and the embedding ring at the bottom of the upper felt piece is inserted into the embedding groove opened at the top of the bottom felt piece for matching. In the process of stacking the felt pieces, the clamping blocks at the bottom of the top felt piece are respectively clamped into the clamping grooves opened in the bottom felt piece. A corresponding number of felt pieces are arranged according to the height of the heat preservation barrel. After each layer of felt pieces is assembled, each connecting strip is respectively connected to the connecting buckle at the top, so that each layer of felt pieces is fixed to avoid loosening due to collision, thereby further improving the firmness of each layer of felt pieces after being inlaid, thereby improving the heat preservation performance.

[0008] Preferably, a embedding groove is provided at the top end of the solid felt single piece, and the embedding groove is an annular structure.

[0009] Preferably, an embedding ring is provided at the bottom end of the single piece of solid felt, and the embedding ring is embedded in the embedding groove.

[0010] Preferably, the solid felt piece is in a circular ring shape, and an annular cavity is opened in the middle of the solid felt piece, and a plurality of annular cavities are overlapped to form a high barrel cavity.

[0011] Preferably, the inner wall of the embedding groove is evenly provided with clamping grooves, and the corresponding bottom of the embedding ring is evenly provided with clamping blocks, and the clamping blocks are engaged with the clamping grooves.

[0012] Preferably, a plurality of connecting buckles are evenly arranged on the outer bottom end of the solid felt single piece, and a connecting strip is arranged on the top end of each connecting buckle, and when two solid felt single pieces are stacked, the connecting strip at the bottom end is connected and matched with the connecting buckle at the top end.

[0013] Preferably, the connecting buckle is a Velcro buckle, and the corresponding end of the connecting strip is provided with an adhesive.

[0014] Preferably, the connecting buckle is a button, and a button hole is provided at the corresponding end of the connecting strip.

[0015] The utility model provides a nested thermal insulation felt for producing single crystals by the Czochralski method, which has the following advantages:

[0016] 1. This scheme adopts a nested design of the embedded groove and embedded ring set by the upper and lower stacked solid felt single piece, which is convenient for replacement and transportation;

[0017] 2 This solution can nest and overlap multiple solid felt pieces, making the height easy to adjust;

[0018] 3. The material used in this scheme is solid felt, which has load-bearing function. It can directly optimize the carbon-carbon insulation barrel and greatly reduce the thermal field cost;

[0019] 4. This scheme designs the upper and lower structures to be spliced ​​in an inlaid style without any gaps, thus solving the problem of heat leakage in splicing;

[0020] 5. This solution uses solid felt instead of soft felt, which does not require manual cutting and saves labor costs;

[0021] 6 This scheme uses the same size of solid felt to inlay and match, so that the solid felt has high appearance dimensional accuracy, is easy to shape, and can easily achieve thermal field standardization;

[0022] 7 This solution increases the insulation thickness by stacking the solid felt pieces in a ring shape, thereby increasing the service life of the solid felt, reducing the cost of use, and making the insulation uniform and easy to adjust the power of crystal pulling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present utility model.

[0024] Figure 2 This is a schematic top view of the three-dimensional structure of a single piece of solid felt according to Example 1 of the utility model.

[0025] Figure 3 This is a schematic diagram of a three-dimensional structure of a single piece of solid felt when viewed from above according to Example 1 of the utility model.

[0026] Figure 4 It is a schematic diagram of the overall structure of the second embodiment of the present utility model.

[0027] Figure 5 This is a schematic top view of the three-dimensional structure of a single piece of solid felt according to the second embodiment of the utility model.

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of a single piece of solid felt when viewed from above according to the second embodiment of the utility model.

[0029] The accompanying drawings are marked as follows: 1. single piece of solid felt; 2. barrel cavity; 3. embedded groove; 4. embedded ring; 5. clamping groove; 6. connecting buckle; 7. connecting strip; 8. clamping block. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Embodiment 1

[0032] As attached Figure 1-3The nested thermal insulation felt for producing single crystals by the direct pulling method shown in the figure comprises a felt piece 1, a plurality of the felt pieces 1 are embedded in each other up and down to form a thermal insulation felt, a barrel cavity 2 is formed in the middle of the thermal insulation felt, a top of the felt piece 1 is provided with an embedding groove 3, the embedding groove 3 is an annular structure, a bottom of the felt piece 1 is provided with an embedding ring 4, the embedding ring 4 is embedded in the embedding groove 3, the felt piece 1 is in a circular ring shape, and a ring cavity is opened in the middle of the felt piece 1, and a plurality of ring cavities are overlapped to form a high barrel cavity 2.

[0033] During the specific assembly implementation, a solid felt piece 1 is sleeved on the insulation barrel with an embedded ring 4 as the bottom, and then another solid felt piece 1 is sleeved on the insulation barrel again, and the embedded ring 4 at the bottom of the upper solid felt piece 1 is inserted into the embedded groove 3 opened on the top of the bottom solid felt piece 1 for matching. In this way, multiple solid felt pieces 1 are sequentially sleeved on the insulation barrel, and the upper and lower connected solid felt pieces 1 are inlaid and matched, and the number of solid felt pieces 1 assembled is adjusted according to the height of the insulation barrel, so that the insulation barrel can be insulated.

[0034] Embodiment 2

[0035] As attached Figure 4-6 The nested thermal insulation felt for producing single crystals by the Czochralski method shown in the figure comprises a felt single piece 1, a plurality of the felt single pieces 1 are embedded in the upper and lower parts to form a thermal insulation felt, a barrel cavity 2 is formed in the middle of the thermal insulation felt, a top of the felt single piece 1 is provided with an embedding groove 3, the embedding groove 3 is annular in structure, a bottom of the felt single piece 1 is provided with an embedding ring 4, the embedding ring 4 is embedded in the embedding groove 3, the felt single piece 1 is annular, and a ring cavity is opened in the middle of the felt single piece 1, and a plurality of ring cavities are superimposed to form a high barrel cavity 2, preferably, the inner wall of the embedding groove 3 is Evenly provided with card slots 5, correspondingly, evenly provided with card blocks 8 at the bottom of the embedded ring 4, the card blocks 8 are engaged with the card slots 5, and a plurality of connecting buckles 6 are evenly provided at the outer bottom end of the solid felt single piece 1, and a connecting strip 7 is provided at the top of each connecting buckle 6. When two solid felt single pieces 1 are stacked, the connecting strip 7 at the bottom is connected and engaged with the connecting buckle 6 at the top. The connecting buckle 6 is a Velcro, and the corresponding end of the connecting strip 7 is provided with an adhesive. The connecting buckle 6 is a button, and the corresponding end of the connecting strip 7 is provided with a button hole.

[0036] In the specific implementation, a solid felt piece 1 is sleeved on the insulation barrel with an embedding ring 4 as the bottom, and then another solid felt piece 1 is taken and sleeved on the insulation barrel again, and the embedding ring 4 at the bottom of the upper solid felt piece 1 is inserted into the embedding groove 3 opened on the top of the bottom solid felt piece 1 for matching. In the process of stacking the solid felt pieces 1 by inlaying and matching, the clamping blocks 8 at the bottom of the top solid felt piece 1 are respectively clamped in the clamping grooves 5 opened in the bottom solid felt piece 1. A corresponding number of solid felt pieces 1 are arranged according to the height of the insulation barrel. After each layer of solid felt pieces 1 is assembled, each connecting strip 7 is respectively connected to the connecting buckle 6 at the top, so that each layer of solid felt pieces 1 is fixed to avoid loosening due to collision, thereby further improving the firmness of each layer of solid felt pieces 1 after inlaying, thereby improving the insulation performance.

[0037] In the above implementation, the embedding groove 3 and the embedding ring 4 provided by the upper and lower superimposed solid felt single piece 1 are of nested design, which is convenient for replacement and transportation.

[0038] A plurality of solid felt pieces 1 can be nested and stacked as a single body, so that the height can be easily adjusted. At the same time, the upper and lower structures are spliced ​​in an inlay manner without gaps, thus solving the problem of heat leakage in the splicing.

[0039] By using solid felt as the material of the solid felt piece 1, which has the load-bearing function itself, the carbon-carbon insulation barrel can be directly optimized to greatly reduce the thermal field cost, and the solid felt is used instead of the soft felt, so that manual cutting is not required and the labor cost is saved.

[0040] By inlaying and matching the solid felt pieces 1 of the same size, the solid felt has high appearance dimensional accuracy, is easy to shape, and can easily achieve thermal field standardization.

[0041] And by stacking the solid felt pieces 1 in a ring shape, the insulation thickness is increased, thereby increasing the service life of the solid felt, reducing the cost of use, and making the insulation uniform and easy to adjust the power of crystal pulling.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nested thermal insulation felt for producing single crystals by the Czochralski method, comprising a felt unit (1), characterized in that: A plurality of the solid felt pieces (1) are embedded in each other up and down to form a heat-insulating solid felt, and a barrel cavity (2) is formed in the middle of the heat-insulating solid felt; The top of the solid felt single piece (1) is provided with an embedding groove (3), and the embedding groove (3) is an annular structure; The bottom end of the solid felt single piece (1) is provided with an embedded ring (4), and the embedded ring (4) is embedded in the embedded groove (3); The solid felt single piece (1) is in the shape of a circular ring, and a ring cavity is opened in the middle of the solid felt single piece (1), and a plurality of ring cavities are superimposed to form a high barrel cavity (2); The inner wall of the embedding groove (3) is evenly provided with clamping grooves (5), and the bottom of the corresponding embedding ring (4) is evenly provided with clamping blocks (8), and the clamping blocks (8) are clamped and matched with the clamping grooves (5); A plurality of connecting buckles (6) are evenly arranged at the bottom of the outer portion of the solid felt single piece (1), and a connecting strip (7) is arranged at the top of each connecting buckle (6). When two solid felt single pieces (1) are stacked, the connecting strip (7) at the bottom is connected and matched with the connecting buckle (6) at the top.

2. The nested thermal insulation felt for producing single crystals by the Czochralski method according to claim 1, characterized in that: The connecting buckle (6) is a Velcro buckle, and the corresponding end of the connecting strip (7) is provided with an adhesive.

3. The nested thermal insulation felt for producing single crystals by the Czochralski method according to claim 2, characterized in that: The connecting buckle (6) is a button, and a button hole is provided at the corresponding end of the connecting strip (7).

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