CN211471637U

CN211471637U - Ingot furnace

Info

Publication number: CN211471637U
Application number: CN201922194184.0U
Authority: CN
Inventors: 陈志军; 陈伟; 李林东; 王全志; 周硕
Original assignee: Baotou Ates Sunshine Energy Technology Co ltd; CSI Cells Co Ltd
Current assignee: Baotou Ates Sunshine Energy Technology Co ltd; CSI Cells Co Ltd; CSI Solar Technologies Inc
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-09-11
Anticipated expiration: 2029-12-09

Abstract

The utility model discloses an ingot furnace, which is used for crystal silicon ingot casting and comprises a furnace body and a heat insulation cage fixedly arranged in the furnace body, wherein a plurality of brackets are convexly extended outwards at the peripheral side of the heat insulation cage, and a plurality of bearing platforms matched with the brackets one by one are arranged on the inner wall of the furnace body; based on the utility model provides a structure of ingot furnace, the relative furnace body of the thermal-insulated cage in its furnace body is fixed to be set up, and at crystalline silicon's ingot casting in-process, the thermal-insulated cage need not to promote, so can avoid leading to the problem that symmetry deviation appears in the thermal field in the thermal-insulated cage because of the thermal-insulated cage promotes, and then can ensure the stability of ingot casting technology, also make the ingot casting of adaptation jumbo size crystalline silicon that the ingot furnace can be better.

Description

Ingot furnace

Technical Field

The utility model relates to a crystalline silicon ingot casting technical field especially relates to an ingot furnace.

Background

With the continuous development of science and technology, people put forward higher and higher requirements on energy, and the search for new energy is also an urgent subject facing to human beings at present. The existing electric energy sources mainly comprise three types, namely thermal power, hydroelectric power and nuclear power, but the three types of energy sources all affect the environment which depends on the existence of people in different degrees, and various installation hidden dangers exist. Therefore, solar energy as clean energy has gradually become an important direction for energy research.

Crystalline silicon solar photovoltaic power generation is the utilization field with the fastest development, the most vitality and the development and research potential at present, and the polycrystalline silicon ingot casting is an important link in the manufacturing process of solar cells. Specifically, in the polycrystalline silicon ingot casting process, a silicon material meeting a certain purity requirement is loaded into an ingot furnace, and ingot casting is completed through the working procedures of heating and melting, directional crystal growth, heat treatment, furnace discharge and the like. In the prior art, in the crystal orientation and growth process, the heat insulation cage is lifted upwards under the condition of keeping a crucible immobile, so that a gap is formed between the heat insulation cage and a lower heat insulation bottom plate, heat is leaked from the gap, the crucible is cooled from the bottom, and then a temperature gradient for enabling molten polycrystalline silicon to upwards orient and grow crystals is formed.

However, along with the gradual increase of the size of the ingot casting, the size and the weight of the heat insulation cage in the ingot casting furnace are greatly increased, so that the heat insulation cage is lifted in the oriented crystal growth process, the heat insulation cage is easy to deform or shake, the symmetry deviation of a thermal field in the heat insulation cage can be caused to a great extent under the conditions, and the stability of the ingot casting process is further influenced.

In view of the above, there is a need to provide an improved solution to the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that prior art exists at least, for realizing the utility model purpose of the aforesaid, the utility model provides an ingot furnace, its concrete design mode as follows.

The utility model provides an ingot furnace for the crystalline silicon ingot casting, include the furnace body and fixed set up in thermal-insulated cage in the furnace body, the week side of thermal-insulated cage is to protruding the stretching outward and be provided with a plurality of brackets, the furnace body inner wall be provided with a plurality of with the bracket matches the confession one by one bracket complex plummer.

Further, the bracket is in lap joint fit with the upper side of the corresponding bearing table, and the ingot furnace is also provided with a levelness adjusting screw rod in threaded fit with the bracket, and the lower end of the levelness adjusting screw rod is abutted to the upper surface of the corresponding bearing table.

Further, the heat insulation cage comprises at least four side plates and side corner plates connected between every two adjacent side plates, and at least one bracket is arranged on the outer side of each side corner plate.

Further, the ingot furnace is also provided with a centering assembly for adjusting the position of the axis of the heat insulation cage.

Further, the centering assembly comprises a plurality of fixed blocks fixed on the peripheral sides of the heat insulation cage and a centering adjusting screw in threaded fit with the fixed blocks and one end of the centering adjusting screw protrudes outwards.

Furthermore, the heat insulation cage comprises at least four side plates and side angle plates connected between every two adjacent side plates, and at least one fixing block and a centering adjusting screw matched with the fixing block in a threaded manner are arranged on the outer side of each side angle plate.

Furthermore, the heat insulation cage comprises a steel frame layer positioned on the outer layer and a heat insulation layer fixed on the inner side of the steel frame layer.

Furthermore, the lateral direction of the lower end of the steel frame layer is inwards extended to form a plurality of supporting parts for supporting the heat insulation layer.

Further, the ingot furnace also comprises a heat exchange platform arranged on the lower side of the heat insulation cage and a cooling device arranged on the lower side of the heat exchange platform.

Further, the cooling device is a cooling disc with a refrigerant fluid flow channel arranged inside.

The utility model has the advantages that: based on the utility model provides a structure of ingot furnace, the relative furnace body of the thermal-insulated cage in its furnace body is fixed to be set up, and at crystalline silicon's ingot casting in-process, the thermal-insulated cage need not to promote, so can avoid leading to the problem that symmetry deviation appears in the thermal field in the thermal-insulated cage because of the thermal-insulated cage promotes, and then can ensure the stability of ingot casting technology, also make the ingot casting of adaptation jumbo size crystalline silicon that the ingot furnace can be better.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of the whole structure of the ingot furnace of the present invention;

FIG. 2 is a schematic diagram of an embodiment of an insulation cage;

FIG. 3 is an enlarged view of a portion a of FIG. 2;

FIG. 4 is a schematic structural view of the bracket of the embodiment of FIG. 2;

fig. 5 is a schematic structural view of the centering assembly in the embodiment of fig. 2.

In the figure, 100 is a furnace body, 11 is a bearing platform; 200 is a heat insulation cage, 21 is a side plate, and 210 is a first supporting part; 22 is a side corner plate, and 220 is a second supporting part; 23 is a top corner plate; 24 is a levelness adjusting component, 241 is a bracket, 2410 is a connecting hole, 2411 is a fixing plate, 2412 is a reinforcing plate, and 242 is a levelness adjusting screw rod; 25 is a centering component, 251 is a fixed block, and 252 is a centering adjusting screw rod; 300 is a crucible; 400 is a heat exchange block; reference numeral 500 denotes a cooling device.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides an ingot furnace is used in crystalline silicon ingot casting, it includes furnace body 100 and the fixed thermal-insulated cage 200 that sets up in furnace body 100, and the week side of thermal-insulated cage 200 is outwards stretched and is provided with a plurality of brackets 241, and furnace body 100 inner wall is provided with a plurality ofly and bracket 241 matches one by one and supplies bracket 241 complex plummer 11. It can be understood that the utility model discloses in, the fixed setting of the relative furnace body of thermal-insulated cage 200 indicates, at crystalline silicon ingot casting in-process, relative position is fixed between thermal-insulated cage 200 and furnace body 100, and at the brilliant stage of growing, need not to promote the operation thermal-insulated cage 200.

Based on the utility model provides a structure of ingot furnace, owing to at crystalline silicon's ingot casting in-process, thermal-insulated cage need not to promote the action, so can avoid leading to the problem that symmetry deviation appears in thermal field in thermal-insulated cage 200 because of thermal-insulated cage 200 promotes, and then can ensure the stability of ingot casting technology, also make the ingot casting of adaptation jumbo size crystalline silicon that the ingot furnace can be better ingot casting.

In the specific implementation process of the utility model, the ingot furnace further has a heat exchange platform 400 arranged at the inner side of the heat insulation cage 200 and used for forming the silicon ingot, and arranged at the lower side of the heat insulation cage 200, wherein the heat exchange platform 400 is used for realizing the heat exchange with the bottom of the crucible 300. In order to realize the directional crystal growth of the silicon material in the molten state in the crucible 300, a cooling device 500 for absorbing heat of the heat exchange table 400 is further provided below the heat exchange table 400.

In the present embodiment, the cooling device 500 is a cooling plate having a refrigerant fluid flow passage provided therein. In the specific implementation process, the cooling disc can be a flat copper disc, a channel for cold water to flow is arranged on the copper disc, the heat absorption speed of the copper disc on the heat exchange table 400 can be adjusted by controlling the flow rate of the cold water, and the upward directional crystal growth speed of 300 in the crucible is further controlled.

For better understanding of the present invention, a specific implementation structure of the thermal insulation cage 200 of the present invention is described below with reference to fig. 2, fig. 3, fig. 4, and fig. 5.

Referring to fig. 1, 2, 3 and 4, the bracket 241 according to the present embodiment is lap-fitted to the upper side of the corresponding susceptor 11, and the ingot furnace further includes a levelness adjusting screw 242 which is screw-fitted to the bracket 241 and whose lower end abuts against the upper surface of the corresponding susceptor 11. In the assembly process of a specific ingot furnace, the adjustment of the distance between the bracket 241 and the upper surface of the bearing table 11 can be realized by rotating the levelness adjusting screw 242, the heat insulation cage 200 can be adjusted to the optimal levelness based on the matching of the plurality of brackets 241 on the peripheral side of the heat insulation cage 200, and then the crystal growing environment in the crystal silicon ingot casting process can be optimized.

Referring to fig. 2, in this embodiment, the thermal insulation cage 200 includes four side plates 21 and two side corner plates 22 connected between two adjacent side plates 21, and two brackets 241 are spaced up and down outside each side corner plate 22. It is understood that in other embodiments of the present invention, the thermal insulation cage 200 may comprise more than four side panels 21, and only one bracket 241 or a greater number of brackets 241 may be provided outside each side panel 22.

Of course, in other embodiments, the bracket 241 may be disposed outside the side plate 21, but in the specific implementation process, since the side angle plate 22 is closer to the inner wall of the furnace body 100 than the side plate 21, the bracket 241 is disposed outside the side angle plate 22, so that the fit between the bracket 241 and the bearing platform 11 is more reliable.

To increase the mechanical strength of insulation cage 200, insulation cage 200 also has top gussets 23 at the top for connecting the top corners of two adjacent side panels 21, as shown with reference to FIG. 2.

As shown in fig. 3 and 4, the bracket 241 according to the present embodiment is fixed to the outer side of the side corner plate 22 by a fixing plate 2411, the bracket 241 is connected to the side of the fixing plate 2411 to form an L-shape, and a reinforcing plate 2412 is connected between the bracket 241 and the fixing plate 2411.

In addition, in this embodiment, the bracket 241 is further provided with two connection holes 2410, and correspondingly, the bearing platform 11 is provided with a matching portion (not shown) corresponding to the connection holes 2410, and in a specific ingot furnace assembling process, a connection bolt (not shown) passing through the connection holes 2410 can be further connected to the matching portion of the bearing platform 11, so as to fix the heat insulation cage 200 and the furnace body 100.

In order to make the axis of the insulation cage 200 coincide with the axis of the furnace body 100 after the ingot furnace is assembled, the ingot furnace of the present invention preferably further comprises a centering assembly 25 for adjusting the position of the axis of the insulation cage 200.

In the present embodiment, the centering assembly 25 includes a plurality of fixing blocks 251 fixed to the periphery of the thermal insulation cage 200, and a centering adjustment screw 252 having one end protruding outward and screwed to the fixing blocks 251. In the assembly process of a specific ingot furnace, the horizontal position of the heat insulation cage 200 can be adjusted by rotating the centering adjusting screws 252, and the axial line of the heat insulation cage 200 can be adjusted to be coincident or approximately coincident with the axial line of the furnace body 100 based on the matching of the plurality of centering adjusting screws 252 on the peripheral side of the heat insulation cage 200.

In this embodiment, a fixing block 251 and a centering adjustment screw 252 threadedly engaged with the fixing block 251 are disposed outside each of the side corner plates 22. It will be appreciated that a greater number of fixing blocks 251 and corresponding centering adjustment screws 252 may be provided on the outer side of each side gusset 22.

Of course, in other embodiments, the fixing block 251 may be disposed on the outer side of the side plate 21, but in a specific implementation, the side angle plate 22 is closer to the inner wall of the furnace body 100 than the side plate 21, and the fixing block 251 is disposed on the outer side of the side angle plate 22, which can reduce the length of the centering adjustment screw 252.

In the specific implementation of the present invention, the heat insulation cage 200 includes an outer steel frame layer, and the side plates 21 and the side angle plates 22 shown in fig. 2 constitute the steel frame layer. To achieve the thermal insulation effect, the thermal insulation cage 200 further has a thermal insulation layer (not shown) fixed to the inner side of the steel frame layer, and the thermal insulation layer may be specifically configured as a thermal insulation felt.

In order to facilitate the fixing and installation of the insulating layer, referring to fig. 2, the lower end of the steel frame layer is laterally and inwardly protruded to form a plurality of supporting parts for supporting the insulating layer. The side plate 21 protrudes inward to form a first supporting portion 210, and the side gusset 22 protrudes inward to form a second supporting portion 220.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. The ingot furnace is used for casting crystalline silicon ingots, comprises a furnace body and is characterized by further comprising a heat insulation cage fixedly arranged in the furnace body, a plurality of brackets are arranged on the periphery of the heat insulation cage in an outwards protruding mode, and the inner wall of the furnace body is provided with a plurality of bearing tables matched with the brackets one by one for supplying.

2. The ingot furnace of claim 1, wherein the brackets are lap-fitted to the upper sides of the respective carriers, and the ingot furnace further has levelness adjusting screws which are screw-fitted to the brackets and abut at lower ends to the upper surfaces of the respective carriers.

3. The ingot furnace of claim 1 or 2, wherein the heat insulation cage comprises at least four side plates and side corner plates connected between every two adjacent side plates, and at least one bracket is arranged outside each side corner plate.

4. The ingot furnace of claim 1 or 2, further comprising a centering assembly for adjusting the position of the axis of the heat insulation cage.

5. The ingot furnace of claim 4, wherein the centering assembly comprises a plurality of fixed blocks fixed on the peripheral side of the heat insulation cage and a centering adjusting screw which is in threaded fit with the fixed blocks and protrudes outwards at one end.

6. The ingot furnace of claim 5, wherein the heat insulation cage comprises at least four side plates and side angle plates connected between every two adjacent side plates, and at least one fixing block and the centering adjusting screw in threaded fit with the fixing block are arranged outside each side angle plate.

7. The ingot furnace of claim 1 or 2, wherein the heat insulation cage comprises a steel frame layer positioned at the outer layer and a heat insulation layer fixed at the inner side of the steel frame layer.

8. The ingot furnace of claim 7, wherein the lower end of the steel frame layer is laterally and inwardly protruded to form a plurality of supporting parts for supporting the insulating layer.

9. The ingot furnace of claim 1 or 2, further comprising a heat exchange station disposed on the underside of the heat insulation cage and a cooling device disposed on the underside of the heat exchange station.

10. The ingot furnace of claim 9, wherein the cooling device is a cooling plate having a coolant flow passage provided therein.