Heat insulation cage and ingot furnace

Abstract

The utility model discloses a heat insulation cage and an ingot furnace, and relates to the technical field of crystal growth. The steel frame comprises a cylindrical steel frame body and a circular steel frame bottom plate, the steel frame body comprises two same steel frame bodies, and the two steel frame bodies are stacked; the steel frame bottom plate is arranged below one steel frame body and forms an accommodating space with the steel frame body; a heat-insulating cylinder; the heat preservation cylinder is a circular heat preservation cylinder; the heat preservation cylinder is arranged on the inner side of the steel frame body and tightly attached to the steel frame body. Each steel frame body is provided with an independent heat preservation cylinder. According to the utility model, the circular steel frame and the circular heat preservation cylinder are adopted, the formed accommodating space is circular, and compared with the conventional square heat insulation cage, the accommodating space of the same ingot furnace is greatly increased, so that a larger crucible can be accommodated, and the loading quantity of the crucible can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crystal growth, in particular to a heat insulation cage and an ingot casting furnace. Background Art

[0002] With the reduction of the cost of casting crystalline silicon, the thermal field of the ingot furnace is constantly expanding. The common thermal field is expanded from G5 to G7 or even G9, and the charge weight is increased from the earliest 500KG to 1300KG or even higher. With the continuous increase in the charge amount, the size of the crucible loaded with silicon material is also gradually increasing, and the requirements for the thermal field space of the ingot furnace are getting bigger and bigger. The previous square insulation cage was set in the round ingot furnace, which wasted a lot of space in the ingot furnace; in addition, with the increase of silicon material, the load-bearing requirements for the insulation cage are also getting bigger and bigger. Therefore, a new insulation cage is urgently needed. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a heat insulation cage and an ingot casting furnace.

[0004] The first aspect of the utility model discloses a heat insulation cage, comprising: a steel frame; the steel frame comprises a cylindrical steel frame body and a circular steel frame bottom plate, the steel frame body comprises two identical steel frame bodies, and the two steel frame bodies are stacked and placed; the steel frame bottom plate is arranged under one of the steel frame bodies, and forms a containing space with the steel frame body;

[0005] Insulation tube; the insulation tube is a circular insulation tube; the insulation tube is arranged inside the steel frame and fits tightly with the steel frame; each steel frame is provided with a separate insulation tube.

[0006] The utility model adopts a circular steel frame and a circular insulation cylinder to form a circular accommodating space. Compared with the previous square insulation cage, for the same ingot casting furnace, the accommodating space is greatly increased, thereby accommodating a larger crucible and effectively increasing the loading amount of the crucible.

[0007] In an optional manner, the steel frame and the heat preservation tube are connected in a detachable locking manner.

[0008] In an optional manner, the steel frame includes an upper ring and a lower ring, and the plurality of support plates are arranged between the upper ring and the lower ring via a second fastener.

[0009] In an optional manner, the upper ring and the lower ring are formed by assembling and connecting a plurality of connecting plates through a first fastener.

[0010] In an optional manner, the insulation cylinder is a circular insulation cylinder formed by at least twelve flat plates; the support plate includes a first support plate; a plurality of the first support plates are spaced apart between the upper ring and the lower ring, and two adjacent first support plates are installed in cooperation with the flat plates.

[0011] In an optional manner, the support plate includes a second support plate; and at least one second support plate is arranged on the steel frame with two second support plates spaced apart.

[0012] In an optional manner, the second support plate is provided with a first through hole, and the first through hole corresponds to the second through hole on the flat plate of the heat preservation cylinder to which the second support plate is attached.

[0013] In an optional manner, the steel frame base plate includes four arc plates and at least two structural plates; the arc circumference of the four arc plates is between 1 / 5 and 1 / 4 of the circumference of the steel frame base plate, and the four arc plates are evenly arranged on the steel frame base plate along the circumference of the steel frame base plate; a third fastener is arranged between two adjacent arc plates; the two structural plates are perpendicular to each other to form a cross structure, and the end faces of the two connecting plates are respectively arranged on the four arc plates.

[0014] In an optional manner, there are four connecting plates, and four structural plates are arranged on the four arc plates in a tic-tac-toe structure.

[0015] The second aspect of the utility model discloses an ingot casting furnace, comprising a heat insulation cage disclosed in the first aspect of the utility model.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) A circular steel frame and a circular insulation tube are used to form an insulation cage. The interior of the insulation cage is a circular space that can accommodate a larger crucible. In addition, the circular heat dissipation method can make the heat in the ingot furnace more uniform, the growth interface of the silicon ingot more stable and uniform, with less heat loss and higher quality.

[0018] (2) The steel frame and the insulation tube are connected in a locking manner, which can reduce the thermal field loss of the insulation cage and make the load-bearing performance of the insulation cage better.

[0019] (3) Setting a structural plate on the bottom plate of the steel frame can effectively increase the load-bearing capacity of the insulation cage.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 A three-dimensional schematic diagram of an embodiment of a steel frame provided by the utility model;

[0023] Figure 2 for Figure 1 A front view of the steel frame shown;

[0024] Figure 3 for Figure 1 A top view of the steel frame shown;

[0025] Figure 4 A three-dimensional schematic diagram of an embodiment of a steel frame provided by the utility model;

[0026] Figure 5 A three-dimensional schematic diagram of an embodiment of the heat preservation cylinder provided by the utility model;

[0027] Figure 6 for Figure 5 A top view of the insulation cylinder shown.

[0028] Reference numerals:

[0029] 10-steel frame; 11-steel frame body; 111-upper ring; 112-lower ring; 1121-connecting strip; 1122-first fastener; 113-support plate; 1131-first support plate; 1132-second support plate; 1133-first through hole; 114-second fastener; 12-steel frame bottom plate; 121-arc plate; 122-structural plate; 123-third fastener; 13-accommodating space; 20-insulation tube; 21-flat plate; 22-second through hole; 221-first flat plate; 222-second flat plate; DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0032] In the ingot furnace, the ingot furnace includes a crucible loaded with silicon material, a guard plate and a bottom plate are arranged outside the crucible, a heater is arranged above the crucible, and an insulation cage is arranged outside the guard plate and the bottom plate. The insulation cage includes a steel frame and an upper insulation layer, an insulation tube and a lower insulation layer, wherein the upper insulation layer is arranged on the inner side of the top of the steel frame; the insulation tube is arranged on the inner side of the middle of the steel frame, and the lower insulation layer is arranged on the inner side of the bottom of the steel frame; the steel frame is a split structure, divided into an upper and lower steel frame, the inner side of the upper steel frame has an upper insulation layer and an upper insulation tube, and the inner side of the lower steel frame has a lower insulation tube and a lower insulation layer, and the upper and lower steel frames form a sealed insulation space that can be opened and closed. In the early stage of the growth of crystalline silicon melt and crystals in the ingot furnace, the insulation cage is a sealed insulation space. As the crystal grows, the insulation cage gradually opens, so that the heat inside the insulation cage can be exchanged with the heat outside the insulation cage. According to different processes, different temperature gradients are formed, and finally the growth of ingot crystalline silicon is completed. It can be seen that the accommodation space formed by the insulation cage will affect the size of the crucible, and the insulation environment of the insulation cage also has a relatively important influence on the growth of ingot crystalline silicon; in addition, the insulation cage needs to bear the insulation layer and insulation tube, so its strength and load-bearing capacity are also relatively important.

[0033] In the heat-insulating cage disclosed in the first aspect of the utility model, the heat-insulating cage is formed by combining a steel frame 10 and a heat-insulating tube 20, wherein the steel frame 10 is a cylindrical steel frame 10; the steel frame 10 has an upper top; a middle side and a lower bottom; the heat-insulating tube 20 is a cylindrical heat-insulating tube 20; the heat-insulating tube 20 is arranged on the inner side of the middle side of the steel frame 10, and fits tightly with the steel frame 10 to form a cylindrical heat-insulating cage.

[0034] Among them, refer to the attached Figure 1-6 The steel frame 10 includes a cylindrical steel frame 10 body; the steel frame 10 body includes two identical steel frame bodies 11, and the two steel frame bodies 11 are symmetrically stacked to form the steel frame 10 body; the steel frame 10 includes a steel frame bottom plate 12, and the steel frame bottom plate 12 is arranged under one of the steel frame bodies 11 to form a steel frame 10 with a accommodating space 13 together with the steel frame 10 body.

[0035] The heat preservation tube 20 is a circular heat preservation tube 20, which is arranged inside the steel frame 11, and each separate steel frame 11 is provided with a separate circular heat preservation tube 20. Therefore, when the two steel frames 11 need to be separated, the heat preservation tube 20 can also be separated along with the separation of the steel frames 11.

[0036] The heat-insulating cage formed by the combination of the circular heat-insulating cylinder 20 and the circular steel frame 10 has a circular accommodation space 13. For the same ingot furnace, the circular accommodation space 13 is much larger than the square accommodation space 13, thereby greatly increasing the space in the ingot furnace. In addition, the circular heat dissipation method can make the heat in the ingot furnace more uniform, the growth interface of the silicon ingot is more stable and uniform, the heat loss is less, and the quality is higher.

[0037] In an optional manner, the steel frame 11 and the heat-insulating cylinder 20 are connected by a detachable locking method, such as a bolt connection, a latch connection, or a slot connection. Thus, the heat-insulating cylinder 20 and the steel frame 11 are not only stronger, but also easy to disassemble and maintain, which effectively reduces the maintenance cost of the heat-insulating cage.

[0038] In an optional manner, the steel frame 11 includes an upper ring 111 and a lower ring 112, and a plurality of support plates 113 are disposed between the upper ring 111 and the lower ring 112 via a second fastener 114. This makes the steel frame 11 more secure.

[0039] Preferably, the upper ring 111 and the lower ring 112 are formed by connecting and assembling a plurality of connecting strips 1121 through a first fastener 1122; thus, the assembly is simple, and the disassembly and assembly are convenient, and the maintenance is convenient.

[0040] In an optional manner, the insulation cylinder 20 is formed by splicing and enclosing at least twelve flat plates 22, and the support plate 113 on the steel frame 11 includes a first support plate 1131, and multiple first support plates 1131 are arranged at intervals between the upper ring 111 and the lower ring 112, and two adjacent first support plates 1131 are installed in cooperation with the flat plate 22.

[0041] In an optional manner, a flat plate 22 is disposed between two adjacent first support plates 1131, that is, the distance between two adjacent first support plates 1131 in the radial direction of the steel frame 10 body is equal to the size of a flat plate 22 of the insulation cylinder 20;

[0042] In an optional manner, the distance between two connected first support plates 6131 is the straight-line distance between the flat plate 22 that fits the heat preservation tube 20 and the steel frame 11 .

[0043] In a specific embodiment, Figure 6As shown, the insulation tube 20 includes two layers, and the outer insulation tube 20 is formed by nine first flat plates 221 and nine second flat plates 222. The upper side length of the cross section of the first flat plate 221 is a, and the distance on the upper side of the cross section of the first flat plate 221 is the straight-line distance of the flat plate 22 that fits the steel frame 11. The distance between the two first support plates 1131 is set to a, thereby making the insulation tube 20 more closely combined with the steel frame 11; the upper side length of the cross section of the second flat plate 222 is equal to the distance between the two first support plates 1131 and the second support plates 1132. The sides of the adjacent first flat plates 221 are on the same straight line segment, forming a distance b, where b is the straight-line distance of the flat plate 22 that fits the steel frame 11. The distance between the two first support plates 1131 is set to b, and a second support plate 1132 can be set between the two first support plates 1131, and the second support plate 1132 is in the middle of the two first support plates 1131, thereby making the insulation tube 20 more closely combined with the steel frame 11, thereby improving the overall strength and thermal insulation performance of the insulation cage.

[0044] In an optional manner, the heat preservation tube 20 includes two layers, both of which are formed by splicing and enclosing at least twelve flat plates 22, and the two layers of the heat preservation layer are connected together by bonding, clamping, welding, bolts, latches, etc., and an outer flat plate 22 is arranged between the two connected first support plates 1131. In this way, the heat preservation tube 20 can be more closely combined with the steel frame 11.

[0045] Preferably, the support plate 113 further includes a second support plate 1132 , at least one second support plate 1132 is arranged between two first support plates 1131 , and the second support plate 1132 is arranged between the two first support plates 1131 , thereby further improving the overall strength and thermal insulation performance of the thermal insulation cage.

[0046] More preferably, the second support plate 1132 is provided with a first through hole 1133, and the first through hole 1133 corresponds to the second through hole 22 on the flat plate 22 of the insulation tube 20 to which the second support plate 1132 is attached; thereby, a detachable connection method can be used, such as a pin connection, a screw connection, a bolt connection, etc. to connect the second support plate 1132 to the flat plate 22 on the insulation tube 20.

[0047] In an optional manner, the steel frame base plate 12 includes four arc plates 121 and at least two structural plates 122; the arc circumference of the four arc plates 121 is between 1 / 5 and 1 / 4 of the circumference of the steel frame base plate 12, and the four arc plates 121 are evenly arranged on the steel frame base plate 12 along the circumference of the steel frame base plate 12; a third fastener 123 is arranged between two adjacent arc plates 121; the two structural plates 122 are perpendicular to each other to form a cross structure, and the end faces of the two connecting plates are respectively arranged on the four arc plates 121.

[0048] Preferably, the steel plate bottom plate includes four structural plates 122 formed in a tic-tac-toe structure and arranged on the four arc plates 121 .

[0049] The ingot casting furnace disclosed in the second aspect of the utility model includes the insulation cage disclosed in the first aspect of the utility model. The beneficial effects of the ingot casting furnace of the utility model are the same as the beneficial effects of the insulation cage of the utility model, which will not be repeated here.

[0050] The heat preservation cylinder 20 disclosed according to the first aspect of the present utility model is described in detail below with several specific embodiments. It is worth noting that the following description is only an exemplary description and is not a specific limitation of the invention. Example

[0051] refer to Figure 1-4 , the steel frame body 11 includes a steel frame 10 body formed by two steel frame bodies 11 and a steel frame bottom plate 12;

[0052] The steel frame body 11 is cylindrical, the steel frame bottom plate 12 is circular, two steel frame bodies 11 are stacked and placed, and are assembled with the steel frame body 11 to form a steel frame 10 with a receiving space 13; each steel frame body 11 is a cylinder with upper and lower openings, and the steel frame body 11 includes an upper ring 111 and a lower ring 112, and the upper ring 111 and the lower ring 112 are connected and assembled by a plurality of connecting strips 1121 through a first fastener 1122, and a plurality of support plates 113 are arranged between the upper ring 111 and the lower ring 112 through a second fastener 114, and a second support plate 1132 is arranged between the two second support plates 1132;

[0053] The steel frame bottom plate 12 includes four arc plates 121 and four structural plates 122; the arc circumference of the four arc plates 121 is between 1 / 5 and 1 / 4 of the circumference of the steel frame bottom plate 12, and the four arc plates 121 are evenly arranged on the steel frame bottom plate 12 along the outer edge of the steel frame bottom plate 12; a third fastener 123 is arranged between four adjacent arc plates 121; the four structural plates 122 are arranged on the four arc plates 121 in a tic-tac-toe structure;

[0054] like Figure 5-6 As shown, the heat preservation tube 20 includes two layers, and the outer heat preservation tube 20 is formed by enclosing and splicing 9 first flat plates 221 and 9 second flat plates 222; the upper side length of the cross section of the first flat plate 221 is a, the upper side length of the cross section of the second flat plate 222 is on the same straight line segment as the side sides of two adjacent first flat plates 221, and the sum of the side lengths of the two adjacent first flat plates 221 and the upper side length of the cross section of the second flat plate 222 is b;

[0055] The distance between the two first support plates 1131 is set to a, and the two first support plates 1131 are made to fit tightly with the first flat plate 221; the distance between the two first support plates 1131 is set to b, and a second support plate 1132 is set between the two first support plates 1131; and the two support plates 113 are adapted to be connected with the second flat plate 222 of the thermal insulation cylinder 20, wherein a first through hole 1133 is set on the second support plate 1132, and a second through hole 22 is set on the second flat plate 222, and a latch is used to connect the second support plate 1132 and the second flat plate 222 so as to form a detachable connection.

[0056] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heat insulation cage for an ingot casting furnace, characterized in that: include: Steel frame; the steel frame comprises a cylindrical steel frame body and a circular steel frame bottom plate, the steel frame body comprises two identical steel frame bodies, and the two steel frame bodies are stacked and placed; the steel frame bottom plate is arranged under one of the steel frame bodies, and forms a containing space with the steel frame body; Insulation tube; The heat preservation cylinder is a circular heat preservation cylinder; The heat-insulating cylinder is arranged inside the steel frame and is closely fitted with the steel frame; each of the steel frames is provided with a separate heat-insulating cylinder.

2. The heat insulation cage according to claim 1, characterized in that: The steel frame and the heat-insulating cylinder are connected in a detachable locking manner.

3. The heat insulation cage according to claim 2, characterized in that: The steel frame includes an upper ring and a lower ring, and a plurality of support plates are arranged between the upper ring and the lower ring through a second fastener.

4. The heat insulation cage according to claim 3, characterized in that: The upper ring and the lower ring are formed by connecting and assembling a plurality of connecting pieces through a first fastener.

5. The heat insulation cage according to claim 3, characterized in that: The heat-insulating cylinder is a circular heat-insulating cylinder formed by at least twelve flat plates; the support plate includes a first support plate; a plurality of the first support plates are arranged between the upper ring and the lower ring at intervals, and two adjacent first support plates are installed in cooperation with the flat plates.

6. The heat insulation cage according to claim 5, characterized in that: The support plate includes a second support plate; at least one second support plate is arranged on the steel frame with two second support plates spaced apart.

7. The heat insulation cage according to claim 6, characterized in that: The second support plate is provided with a first through hole, and the first through hole corresponds to the second through hole on the flat plate of the heat preservation cylinder to which the second support plate is attached.

8. The heat insulation cage according to claim 1, characterized in that: The steel frame base plate includes four arc plates and at least two structural plates; the arc circumference of the four arc plates is between 1 / 5 and 1 / 4 of the circumference of the steel frame base plate, and the four arc plates are evenly arranged on the steel frame base plate along the circumference of the steel frame base plate; a third fastener is arranged between two adjacent arc plates; the two structural plates are perpendicular to each other to form a cross structure, and the end faces of the two connecting plates are respectively arranged on the four arc plates.

9. The heat insulation cage according to claim 8, characterized in that: There are four connecting plates, and four structural plates are arranged on the four arc plates in a tic-tac-toe structure.

10. An ingot casting furnace, characterized in that: It comprises a heat-insulating cage as described in any one of claims 1 to 9.

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