Solar cell carrying frame for chain rod type sintering furnace

Abstract

The utility model relates to the technical field of solar cell sintering, in particular to a solar cell carrying frame for a chain rod type sintering furnace, which comprises a frame body and curved sealing plates arranged at the end parts of the two sides of the frame body along the length direction, in the application process, the curved sealing plate is matched with the furnace wall structure, gas convection inside and outside the furnace body is prevented, heat loss in the furnace body is avoided, and high efficiency and energy conservation are achieved. Due to the design of the curved sealing plate, convection of gas inside and outside the furnace body is blocked, the atmosphere in the furnace body is more stable, and the effects of reducing furnace temperature fluctuation and reducing the temperature difference in the furnace are achieved. And moreover, the bracket and the supporting piece are arranged on the frame body, so that the problems of abrasion, corrosion and pollution caused by direct contact between the solar cell and the bracket are avoided. Meanwhile, the two ends of the frame body in the length direction are designed in a segmented mode and are fixedly connected through the heat insulation connecting pieces, heat conduction of the frame body is blocked, heat in the furnace is prevented from being conducted to transmission parts, connected with the frame body, at the two ends through the frame body, and the transmission parts are prevented from being heated to deform and fail.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell sintering, in particular to a solar cell carrying rack for a chain rod type sintering furnace. Background Art

[0002] The solar cell sintering furnace is one of the key equipment in the production process of crystalline silicon cells. The chain rod type sintering furnace is equipped with a carrier for carrying solar cells. When the carrier is driven to move, the solar cells are transferred synchronously. Figure 1 As shown, in the application scenario, the carrier is installed between the upper furnace body 100 and the lower furnace body 200, and the two ends of the frame 1 extend outward from the furnace walls on both sides of the upper furnace body 100 and the lower furnace body 200, and then a gap space 300 is formed between the upper and lower furnace walls for the two ends of the carrier to pass through and extend outward. The existence of the gap space 300 makes it impossible to isolate the airflow in the working chamber 400 from the space outside the sintering furnace, and the heat in the furnace body will be convectively dissipated outward, increasing the energy consumption of the equipment and causing energy waste. In addition, due to the convection of gas inside and outside the furnace body, the temperature in the working chamber will fluctuate, resulting in a large temperature difference, affecting the uniformity of sintering.

[0003] Furthermore, the outward extension of the rack will cause heat to be conducted outward, and the heat will be directly transferred to the transmission components (transmission chain) connected to the mounting rack based on heat conduction, causing the transmission chain to expand and deform due to heat, reducing transmission stability. At the same time, the mounting rack is prone to heat deformation during long-term use, and the supporting structure used to place solar cells is prone to wear and corrosion. Utility Model Content

[0004] The utility model aims to provide a solar cell mounting rack for a chain rod type sintering furnace, so as to solve the problem of excessive energy consumption of the sintering furnace caused by design defects of the mounting rack in the prior art, and to solve the problem that the mounting rack structure itself and the structure connected thereto are easily invalidated due to heat deformation.

[0005] The technical solution of the utility model is: a solar cell mounting rack for a chain rod type sintering furnace, comprising a rack body and curved sealing plates installed at both side ends of the rack body along the length direction; the curved sealing plate comprises a fixed end fixedly connected to the rack body and an extension end extending toward the periphery of the rack body.

[0006] Preferably, the extension direction of the extension end is perpendicular to the length direction of the frame.

[0007] Preferably, both side ends of the frame body are respectively provided with at least one curved sealing plate. When more than two curved sealing plates are arranged on the same side, the plurality of curved sealing plates are vertically aligned or staggered.

[0008] Preferably, a plurality of through holes are distributed on any end surface of the frame.

[0009] Preferably, the frame body is provided with at least one group of brackets distributed in pairs, and the brackets have support surfaces, and the support surfaces are directly used for mounting solar cells, or support members for mounting solar cells are arranged on the support surfaces.

[0010] Preferably, the bracket includes a guide rod and a limit member, and a reserved gap is provided between the guide rod and the limit member. After the limit member is deformed by an external force, the reserved gap increases, thereby forming a gap between the limit member and the guide rod for the support member to be inserted into the guide rod.

[0011] Preferably, the reserved gap is accommodated in the support member.

[0012] Preferably, both side ends of the frame along the length direction are respectively disconnected to form a heat-insulating space, and are fixed by a heat-insulating connector.

[0013] Preferably, the thermal insulation connector and the curved sealing plate form an assembly, and the fixed end of the curved sealing plate is constructed as a thermal insulation connector.

[0014] Preferably, the frame body and the bracket are integrally formed from sheet metal, and at least a portion of the structure of the bracket is formed by bending.

[0015] Preferably, the cross-sectional structure of the frame along the direction perpendicular to the length is any one of U-shaped, C-shaped, n-shaped and L-shaped.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] (1) By adding a curved sealing plate to the frame and coordinating the curved sealing plate with the furnace wall structure during use, gas convection inside and outside the furnace body is prevented, thereby avoiding heat loss inside the furnace body and achieving high efficiency and energy saving; and due to the design of the curved sealing plate, the convection of gas inside and outside the furnace body is blocked, making the atmosphere inside the furnace body more stable, and also having the effect of reducing furnace temperature fluctuations and reducing temperature differences inside the furnace.

[0018] (2) A bracket is provided on the frame for carrying solar cells, and a support made of heat-resistant and / or wear-resistant and / or corrosion-resistant material is provided on the bracket for supporting the solar cells, so as to avoid the problems of wear, corrosion and contamination caused by direct contact between the solar cells and the bracket.

[0019] (3) To facilitate the installation of the support, a guide rod is formed on the bracket, and a limiter is designed to effectively prevent the support from falling off, and the assembly is ingenious.

[0020] (4) The two ends of the frame along the length direction are designed in sections and fixedly connected by heat-insulating connectors to block the heat conduction of the frame itself and prevent the heat in the furnace from being conducted through the frame to the transmission parts connected to the frame at both ends, thereby preventing them from being deformed and failing due to heat.

[0021] (5) The heat-insulating connector and the curved sealing plate are formed into an assembly, through which both heat conduction and heat convection can be avoided; the former is achieved based on the segmented design of the frame, and the latter is achieved based on the design of the epitaxial structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0023] Figure 1 This is a front view of the solar cell mounting rack for the chain-rod type sintering furnace of the utility model in an application scenario;

[0024] Figure 2 This is a front view of the solar cell mounting rack for the chain rod type sintering furnace of the utility model;

[0025] Figure 3 This is a schematic structural diagram of the curved sealing plate of the utility model in one embodiment;

[0026] Figure 4 It is a front view of a plurality of solar cell mounting racks for a chain-rod type sintering furnace in an application scenario in one embodiment of the utility model;

[0027] Figure 5 It is a front view of a plurality of solar cell carriers for a chain-rod type sintering furnace in another embodiment of the utility model in an application scenario;

[0028] Figure 6 This is a schematic structural diagram of the curved sealing plate of the utility model in another embodiment;

[0029] Figure 7 This is a schematic diagram of the structure of the solar cell carrier for the chain rod type sintering furnace of the utility model;

[0030] Figure 8 It is a front view of the bracket of the utility model in one embodiment;

[0031] Fig. 9 It is a front view of the bracket of the utility model in another embodiment;

[0032] Fig.10 For the utility model Fig. 9 A partial enlarged schematic diagram of the bracket described in;

[0033] Fig.11 For the utility model Fig. 9 A schematic diagram of the structure of the bracket during assembly;

[0034] Fig.12 This is a schematic diagram of the structure of the thermal insulation connector of the utility model;

[0035] Fig.13 It is a structural schematic diagram of the heat-insulating connector and the curved sealing plate of the utility model when they are designed in combination.

[0036] Wherein: 100, upper furnace body, 200, lower furnace body, 300, gap space, 400, working chamber;

[0037] 1. Frame;

[0038] 11. top plate, 12. bottom plate, 13. side plate, 14. through hole;

[0039] 2. Curved sealing plate;

[0040] 21, fixed end, 22, extension end;

[0041] 3. Bracket;

[0042] 30. support surface, 31. guide rod, 32. stopper, 33. support member, 34. reserved gap, 35. notch;

[0043] 4. Thermal insulation connectors. DETAILED DESCRIPTION

[0044] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0045] like Figure 2 As shown, a solar cell mounting rack for a chain rod sintering furnace includes a rack body 1 and curved sealing plates 2 installed at both side ends of the rack body 1 along the length direction; the curved sealing plate 2 includes a fixed end 21 fixedly connected to the rack body 1 and an extension end 22 extending toward the periphery of the rack body 1.

[0046] In one embodiment, the extension direction of the extension end 22 is perpendicular to the length direction of the frame 1. Figure 2 Taking the direction shown as an example, the frame 1 is arranged in the horizontal direction, and the epitaxial end 22 is arranged in the vertical direction. The epitaxial end 22 cooperates with the furnace wall structure of the sintering furnace to block the airflow, avoid heat loss in the sintering furnace, and reduce energy consumption; at the same time, it can also make the atmosphere in the sintering furnace more stable and the temperature difference fluctuation smaller.

[0047] In other embodiments, the extension end 22 can also be arranged in an inclined direction. As long as it is ensured to have a protruding extension structure compared to the end face of the frame body 1 and is assisted by the cooperation of the furnace wall structure, it can be ensured that the mounting rack with the curved sealing plate 2 can reduce heat convection compared to the traditional mounting rack.

[0048] Regarding the forming method of the curved sealing plate 2, in one embodiment, Figure 3 As shown, the curved sealing plate 2 and the frame 1 are designed separately, so that the fixed end 21 of the curved sealing plate 2 can be fixedly connected to the frame 1 by bolts or by welding.

[0049] In other embodiments, the curved sealing plate 2 and the frame 1 may be integrally formed, and the curved sealing plate 2 is formed by bending. In this case, the fixed end 21 of the curved sealing plate 2 may be defined as a root corresponding to the bending position.

[0050] The extension end 22 of the curved sealing plate 2 needs to extend not only in the vertical direction but also in the horizontal direction to both sides. Figure 4 As shown, in the application scenario, the mounting racks are arranged in an array, and in order for the curved sealing plates 2 to play a role in blocking the airflow, the curved sealing plates 2 on adjacent mounting racks need to be designed to be close to each other.

[0051] In one embodiment, if Figure 4 As shown, the set height S is the height of the gap space 300 through which the frame 1 passes. When the two side ends of the frame 1 are respectively provided with a curved sealing plate 2, and the extended end 22 only extends upward in the vertical direction, the curved sealing plate 2 plays a certain role in blocking the airflow, but the blocking effect is relatively poor.

[0052] In another embodiment, Figure 5 As shown, the two ends of the frame 1 are provided with two curved sealing plates 2, and the corresponding extension ends 22 extend upward and downward in the vertical direction, respectively. At this time, the curved sealing plates 2 can block the gap space 300 and block the airflow. It should be noted that when more than two curved sealing plates 2 are arranged on the same side of the frame 1, the multiple curved sealing plates 2 are aligned or staggered, and the staggered distribution method can refer to Figure 2 shown.

[0053] In other embodiments, Figure 6 As shown, the two side ends of the frame 1 are respectively provided with a curved sealing plate 2, and the extended end 22 of the curved sealing plate 2 is configured into a "mouth" shape, so that the extended end 22 simultaneously realizes extension in four directions of up, down, left and right, thereby realizing the blocking of the gap space 300.

[0054] The frame 1 is made of stainless steel, specifically, 310, 316 or 304 stainless steel. In the application scenario, both ends of the frame 1 are fixed to the transmission chain and move synchronously with the movement of the transmission chain. Figure 7 As shown, the frame 1 is formed by bending, and the cross section perpendicular to the length direction can be constructed into a C-shape, U-shape, n-shape, L-shape, etc., and a plurality of through holes 14 can be distributed on any corresponding end surface.

[0055] In one embodiment, if Figure 7 As shown, the cross section of the frame 1 is a C-shaped structure, and then corresponds to a top plate 11, a bottom plate 12 and a side plate 13. The C-shaped structure can be used to improve the support force of the frame 1. The through hole 14 formed on any one or more end surfaces of the top plate 11, the bottom plate 12 and the side plate 13 can reduce the weight of the mounting frame, reduce heat storage, and reduce the heat brought to the outside of the sintering furnace by the mounting frame. In addition, the position of the through hole 14 reduces the cross-sectional area of ​​the frame 1, reduces the channel for the heat in the sintering furnace to be conducted to both ends through the frame 1, and avoids overheating and deformation of the transmission chains at both ends of the mounting frame.

[0056] like Figure 7 , Figure 8 As shown, at least one group of brackets 3 distributed in pairs are arranged on the frame 1, and the brackets 3 can be integrally formed with the frame 1 by sheet metal, and at least part of the structure including the brackets 3 is formed by bending. That is, the root of the bracket 3 can be bent directly relative to the frame 1, or the bracket 3 can be bent together with part of the frame 1.

[0057] Alternatively, the bracket 3 and the frame body 1 are designed separately and then fixed by welding, or are designed separately and then fixed by bolts.

[0058] In one embodiment, the support 3 has a support surface 30 on which the solar cells are directly mounted. In this case, the support 3 is in direct contact with the solar cells, which may cause problems such as wear, corrosion, and contamination over a long period of time.

[0059] In other embodiments, a support member 33 for carrying solar cells is disposed on the support surface 30; the support member 33 is made of heat-resistant and / or wear-resistant and / or corrosion-resistant materials, generally ceramic, glass or quartz glass, etc.; mainly due to the high furnace temperature in the sintering furnace, the metal bracket 3 is easily corroded by the solar cell itself and the slurry and other chemical substances attached to the solar cell, and the corroded bracket 3 will also cause pollution to the solar cell; at the same time, the thermal conductivity of the bracket 3 is relatively high, and due to the heat conduction effect, the temperature of the contact part between the solar cell and the bracket 3 will be uneven, affecting the uniformity of the sintering of the solar cell; therefore, by adding a support member 33 to the bracket 3, the above problems can be effectively avoided. Fig. 9 , Fig.10 As shown, the bracket 3 includes a guide rod 31 and a limiter 32, and a reserved gap 34 is provided between the guide rod 31 and the limiter 32. Fig.11 As shown, after the stopper 32 is deformed by the external force, the reserved gap 34 increases, and then a notch 35 is formed between the stopper 32 and the guide rod 31 for the support member 33 to be inserted into the guide rod 31. When the support member 33 is assembled, the reserved gap 34 can be accommodated in the support member 33. It should be noted that the guide rod 31 and the stopper rod on the bracket 3 can be formed by direct cutting or by welding, but it is more convenient to adopt the direct cutting method.

[0060] Since the integrally formed frame 1 in the sintering furnace will generate heat conduction to both sides after being heated, and the heat is easily transferred to the transmission chain, in one embodiment, Fig.12 As shown, the two side ends of the frame 1 along the length direction are respectively disconnected to form a heat insulation space, and are fixed by a heat insulation connector 4. The heat insulation connector 4 can be made of ceramic, quartz glass, glass fiber, asbestos, rock wool, etc., to block heat conduction and reduce the possibility of heat deformation of the transmission chain.

[0061] Based on the design of the heat insulation connector 4 and the curved sealing plate 2, combined with Fig.13 As shown, in other embodiments, the thermal insulation connector 4 and the curved sealing plate 2 may be combined to form a composite member, and thus the fixed end 21 of the curved sealing plate 2 may be constructed as the thermal insulation connector 4 .

[0062] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A solar cell mounting rack for a chain rod type sintering furnace, characterized in that: The invention comprises a frame (1), and curved sealing plates (2) installed at both side ends of the frame (1) along the length direction; the curved sealing plates (2) comprise a fixed end (21) fixedly connected to the frame (1), and an extended end (22) extending toward the peripheral side of the frame (1).

2. The solar cell mounting rack for a chain rod type sintering furnace according to claim 1, characterized in that: The extension direction of the extension end (22) is perpendicular to the length direction of the frame (1).

3. The solar cell mounting rack for a chain rod type sintering furnace according to claim 2, characterized in that: The two side ends of the frame (1) are respectively provided with at least one curved sealing plate (2); when more than two curved sealing plates (2) are arranged on the same side, the plurality of curved sealing plates (2) are vertically aligned or staggered.

4. The solar cell mounting rack for a chain rod type sintering furnace according to claim 1, characterized in that: A plurality of through holes (14) are distributed on any end surface of the frame (1).

5. The solar cell mounting rack for a chain rod type sintering furnace according to claim 1, characterized in that: The frame (1) is provided with at least one group of brackets (3) distributed in pairs, and the brackets (3) are provided with support surfaces (30), and the support surfaces (30) are directly used to carry solar cells, or support members (33) for carrying solar cells are arranged on the support surfaces (30).

6. The solar cell mounting rack for a chain rod type sintering furnace according to claim 5, characterized in that: The support (3) comprises a guide rod (31) and a limiting member (32); a reserved gap (34) is provided between the guide rod (31) and the limiting member (32); after the limiting member (32) is deformed by an external force, the reserved gap (34) increases, thereby forming a notch (35) between the limiting member (32) and the guide rod (31) for the support member (33) to be inserted into the guide rod (31).

7. The solar cell mounting rack for a chain rod type sintering furnace according to claim 6, characterized in that: The reserved gap (34) is accommodated in the support member (33).

8. The solar cell mounting rack for a chain rod type sintering furnace according to claim 1, characterized in that: The two side ends of the frame (1) along the length direction are respectively disconnected to form a heat-insulating space, and are fixed by a heat-insulating connector (4).

9. The solar cell mounting rack for a chain rod type sintering furnace according to claim 8, characterized in that: The heat-insulating connector (4) and the curved sealing plate (2) form a combined component, and the fixed end (21) of the curved sealing plate (2) is constructed as the heat-insulating connector (4).

10. The solar cell mounting rack for a chain rod type sintering furnace according to claim 5, characterized in that: The frame body (1) and the bracket (3) are integrally formed from sheet metal, and at least a portion of the structure of the bracket (3) is formed by bending.

11. The solar cell mounting rack for a chain rod type sintering furnace according to any one of claims 1 to 10, characterized in that: The cross-sectional structure of the frame (1) along the direction perpendicular to the length is any one of U-shaped, C-shaped, n-shaped and L-shaped.

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