Energy-saving sintering furnace

Abstract

The application discloses an energy-saving sintering furnace, which comprises a furnace body and a carrier. The furnace body comprises a support frame, the head and tail ends of the support frame are respectively provided with a first rotary disc and a second rotary disc, the first rotary disc is connected with the second rotary disc through a furnace belt, and the first rotary disc is provided with a first transmission shaft. The furnace body further comprises a driving motor, the driving motor drives the first rotary disc to rotate through the first transmission shaft. The second rotary disc is provided with a second transmission shaft, the second transmission shaft penetrates through the support frame and is provided with a first transmission device. The carrier comprises a support rod and a bearing device, the bearing device is provided with a third transmission shaft. One end of the third transmission shaft is connected with the support rod, and the other end of the third transmission shaft is connected with the support frame. The bearing device is provided with an opening on the side facing the support rod. The outer surface of the bearing device is provided with a second transmission device, and the first transmission device is connected with the second transmission device. The first transmission device and the second transmission device are matched to continuously and slowly stir the slurry, thereby increasing the printability of the slurry.

Description

Technical Field

[0001] This invention relates to the field of solar cell sintering technology, and more specifically, to an energy-saving sintering furnace. Background Technology

[0002] Sintering is a crucial step in the manufacturing process of solar cells. During production, silver paste is used to print electrodes on both sides of the cell, while aluminum paste is used to print the back field on the back. After drying and sintering, the silver and aluminum pastes form silver-silicon and aluminum-silicon alloys with silicon, respectively, creating good contact. The electrodes and back field primarily function to conduct the electrical energy generated by the solar cell. Simultaneously, the aluminum back field, due to its n-type heavy doping on the back of the cell, also helps to improve minority carrier lifetime, thereby increasing cell efficiency.

[0003] The sintering process is usually completed inside the sintering furnace, but existing sintering furnaces do not have the function of stirring the slurry.

[0004] Therefore, there is an urgent need to provide an energy-saving sintering furnace with a stirring function. Summary of the Invention

[0005] In view of this, the present invention provides an energy-saving sintering furnace, including a furnace body and a carrier;

[0006] The furnace body includes a support frame, and the first turntable and the second turntable are respectively installed at the head and tail ends of the support frame. The first turntable is connected to the second turntable through a furnace belt. A first drive shaft extending along a first direction is provided inside the first turntable. The first direction intersects with the drive direction of the furnace belt.

[0007] The furnace body also includes a drive motor, which drives the first turntable to rotate via the first transmission shaft;

[0008] The second turntable is provided with a second drive shaft extending along the first direction, and the second drive shaft passes through the support frame and then a first transmission device is provided.

[0009] The carrier includes a support rod extending in a second direction and a bearing device extending in a first direction. The bearing device is used to carry at least one sealed container containing slurry. A third drive shaft extending in the first direction is sleeved inside the bearing device, wherein the second direction intersects the first direction.

[0010] One end of the third drive shaft is connected to the support rod, and the other end of the third drive shaft is connected to the support frame;

[0011] The bearing device has an opening on the side facing the support rod;

[0012] The outer surface of the bearing device is provided with a second transmission device that cooperates with the first transmission device, and the first transmission device is connected to the second transmission device.

[0013] Optionally, the first transmission device includes a first gear body sleeved on the second transmission shaft, and the first gear body is provided with a first gear in the circumferential direction;

[0014] The second transmission device includes a second gear body sleeved on the bearing device, and the second gear body is provided with a second gear meshing with the first gear along the circumferential direction;

[0015] The first gear meshes with the second gear.

[0016] Optionally, the bearing device has an inner wall and an outer wall, the thickness of the inner wall along the circumferential direction near the opening is h1, and the thickness of the inner wall along the circumferential direction away from the opening is h2, wherein h1 > h2.

[0017] Optionally, the supporting device has an inner wall and an outer wall;

[0018] Along the second direction, the thickness of the inner wall gradually decreases on the side near the opening.

[0019] Optionally, the cross-section of the inner wall along the second direction is trapezoidal.

[0020] Optionally, the bearing device further includes a sleeve, through which the third drive shaft passes and is fixedly connected to the sleeve.

[0021] Optionally, the supporting device is cylindrical in shape.

[0022] Optionally, the drive motor is fixed to one side of the support frame.

[0023] Compared with the prior art, the energy-saving sintering furnace provided by the present invention achieves at least the following beneficial effects:

[0024] This invention features a second drive shaft housed within a second turntable, which passes through a support frame and is followed by a first transmission device. The carrier includes a support rod extending in a second direction and a bearing device extending in a first direction. The bearing device supports at least one slurry tank, and a third drive shaft extending in the first direction is sleeved within the bearing device. One end of the third drive shaft is connected to the support rod, and the other end is connected to the support frame. The bearing device has an opening facing the support rod. A second transmission device, cooperating with the first transmission device, is provided on the outer surface of the bearing device. The first and second transmission devices are connected, which, on the one hand, drive the bearing device to rotate slowly, allowing the slurry tank to rotate slowly within the bearing device, achieving continuous and slow stirring of the slurry, increasing its printability, thereby improving printing quality, increasing the yield of photovoltaic products, and reducing production costs. On the other hand, it improves the utilization rate of the support frame.

[0025] Of course, any product implementing this invention does not necessarily need to achieve all of the technical effects described above at the same time.

[0026] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0028] Figure 1 This is a top view of the energy-saving sintering furnace provided by the present invention;

[0029] Figure 2 This is a side view of the energy-saving sintering furnace provided by the present invention;

[0030] Figure 3 This is a partial structural schematic diagram of the energy-saving sintering furnace provided by the present invention;

[0031] Figure 4 This is a side view of the first transmission device and the second transmission device provided by the present invention in cooperation.

[0032] Figure 5 This is another partial structural schematic diagram of the energy-saving sintering furnace provided by the present invention;

[0033] Figure 6 This is another top view of the energy-saving sintering furnace provided by the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the third transmission shaft and the bearing device provided by the present invention.

[0035] Figure 8 yes Figure 7 A cross-sectional view of line A-A'. Detailed Implementation

[0036] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0037] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0038] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0039] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0041] Figure 1 This is a top view of the energy-saving sintering furnace provided by the present invention; Figure 2 This is a side view of the energy-saving sintering furnace provided by the present invention; Figure 3 This is a partial structural schematic diagram of the energy-saving sintering furnace provided by the present invention; Figure 4 This is a side view of the first transmission device and the second transmission device provided by the present invention in cooperation. Figure 5 This is another partial structural schematic diagram of the energy-saving sintering furnace provided by the present invention; see reference. Figures 1-5 As shown, this embodiment provides an energy-saving sintering furnace 100, including a furnace body 1 and a carrier 2;

[0042] The furnace body 1 includes a support frame 10. A first turntable 11 and a second turntable 12 are respectively installed at the head and tail ends of the support frame 10. The first turntable 11 is connected to the second turntable 12 through the furnace belt 13. A first drive shaft 110 extending along the first direction X is provided inside the first turntable 11. The first direction X intersects with the drive direction Y of the furnace belt 13.

[0043] The furnace body 1 also includes a drive motor 50, which drives the first turntable 11 to rotate via the first transmission shaft 110;

[0044] The second turntable 12 is provided with a second drive shaft 120 extending along the first direction X. The second drive shaft 120 passes through the support frame 10 and then a first transmission device 121 is provided.

[0045] The carrier 2 includes a support rod 20 extending along the second direction Z and a bearing device 21 extending along the first direction X. The bearing device 21 is used to carry at least one sealed container 22 containing slurry. A third drive shaft 218 extending along the first direction X is sleeved inside the bearing device 21, wherein the second direction Z intersects the first direction X.

[0046] One end of the third drive shaft 218 is connected to the support rod 20, and the other end of the third drive shaft 218 is connected to the support frame 10;

[0047] The bearing device 21 has an opening 210 on the side facing the support rod 20;

[0048] The outer surface of the bearing device 21 is provided with a second transmission device 211 that cooperates with the first transmission device 121, and the first transmission device 121 is connected to the second transmission device 211.

[0049] Specifically, the energy-saving sintering furnace 100 includes a furnace body 1 and a carrier 2. The furnace body 1 includes a support frame 10, which can be rectangular in shape. A first turntable 11 and a second turntable 12 are respectively installed at the head and tail ends of the support frame 10. The first turntable 11 and the second turntable 12 are symmetrically arranged. The first turntable 11 and the second turntable 12 can be cylindrical in shape. The first turntable 11 is connected to the second turntable 12 through a furnace belt 13, which is a mesh furnace belt. The diameter of the first turntable 11 and the second turntable 12 can be 30-50cm. If the diameter of the first turntable 11 and the second turntable 12 is 30cm, then the circumference of the first turntable 11 and the second turntable 12 is 94.2cm. Taking the conveyor belt 13 of the furnace as an example with a transmission speed of 11 meters per minute, it takes 5.1 seconds for the first turntable 11 to rotate once, and about 12 rotations per minute. Of course, the speed of the furnace belt 13 can also be set faster according to the actual situation, such as 13-18 rotations per minute for the first turntable 11. The furnace belt 13 is usually divided into a drying zone 3, a sintering zone 4, and a cooling zone 5. Lamp tube groups 7 and cooling fans 8 are installed above and below the furnace belt 13, respectively. The lamp tube groups correspond to the drying zone 3 and the sintering zone 4, and each lamp tube group includes at least two lamp tubes. The cooling fans 8 correspond to the cooling zone 5. The solar cells 6 are placed on the furnace belt 13 for conveying, such as the solar cells 6 passing through the drying zone 3, the sintering zone 4, and the cooling zone 5 in sequence.

[0050] The first turntable 11 is provided with a first drive shaft 110 extending along the first direction X, and the first direction X intersects with the drive direction Y of the furnace belt 13.

[0051] The furnace body 1 also includes a drive motor 50, which can be directly fixed to one side of the support. The output shaft of the drive motor 50 is connected to one end of the first transmission shaft 110. The drive motor 50 drives the first turntable 11 to rotate through the first transmission shaft 110.

[0052] The second turntable 12 is provided with a second drive shaft 120. The second drive shaft 120 extends along the first direction X. After passing through the support frame 10, the second drive shaft 120 is installed with the first drive device 121. The second drive shaft 120 is fixedly connected to the first drive device 121.

[0053] The carrier 2 includes a support rod 20 and a bearing device 21. The support rod 20 extends along the second direction Z and can be a solid tube or a hollow tube. The bearing device 21 extends along the first direction X and can be a cylindrical bearing tank. The bearing device 21 has a hollow structure and is cylindrical in shape, which can hold more slurry tanks. The bearing device 21 is used to carry at least one sealed tank 22 containing slurry. For example, 3-4 sealed tanks 22 containing slurry can be placed in the bearing device 21. For ease of description, the sealed tank 22 containing slurry is simply referred to as a slurry tank. A third drive shaft 218 extending along the first direction X is sleeved inside the bearing device 21. The second direction Z intersects the first direction X. Optionally, the second direction Z can be perpendicular to the first direction X.

[0054] One end of the third drive shaft 218 is movably connected to the support rod 20, and the other end of the third drive shaft 218 is movably connected to the support frame 10.

[0055] The supporting device 21 has an opening 210 on the side facing the support rod 20. The slurry tank is placed inside the supporting device 21 through the opening 210.

[0056] The outer surface of the bearing device 21 is provided with a second transmission device 211 that cooperates with the first transmission device 121. The first transmission device 121 and the second transmission device 211 are connected. The first transmission device 121 and the second transmission device 211 can both be gear transmissions or belt transmissions, as long as the first transmission device 121 and the second transmission device 211 can be connected.

[0057] The working principle of the energy-saving sintering furnace 100 is as follows: the drive motor 50 drives the first turntable 11 to rotate through the first transmission shaft 110. The first turntable 11 drives the second turntable 12 to rotate through the furnace belt 13. The rotation of the second turntable 12 drives the first transmission device 121 connected to the second transmission shaft 120 to rotate. Since the first transmission device 121 is connected to the second transmission device 211, the first transmission device 121 drives the second transmission device 211 to rotate, thereby causing the bearing device 21 to rotate continuously and slowly, driving the slurry tank to rotate.

[0058] As can be seen from the above embodiments, the energy-saving sintering furnace 100 provided by the present invention achieves at least the following beneficial effects:

[0059] In this embodiment, a second drive shaft 120 is provided inside the second turntable 12, and a first drive device 121 is provided after the second drive shaft 120 passes through the support frame 10; the carrier 2 includes a support rod 20 extending along the second direction Z and a bearing device 21 extending along the first direction X. The bearing device 21 is used to support at least one slurry tank, and a third drive shaft 218 extending along the first direction X is sleeved inside the bearing device 21; one end of the third drive shaft 218 is connected to the support rod 20, and the other end of the third drive shaft 218 is connected to the support frame 10; the bearing device 21 has an opening 210 on the side facing the support rod 20; the outer surface of the bearing device 21 is provided with a second transmission device 211 that cooperates with the first transmission device 121. The first transmission device 121 and the second transmission device 211 are connected. On the one hand, the bearing device 21 can be driven to rotate slowly, so that the slurry tank is placed in the bearing device 21 and rotates slowly, so as to achieve the effect of continuous and slow stirring of the slurry, increase the printability of the slurry, thereby improving the printing quality, increasing the yield of photovoltaic products, and reducing production costs; on the other hand, it improves the utilization rate of the support frame 10.

[0060] It should be noted that because the first turntable 11 rotates at a relatively slow speed, the slurry tank will not roll out of the support device 21 when it rotates inside the support device 21.

[0061] It should be noted that: Figure 6 This is another top view of the energy-saving sintering furnace provided by the present invention; see reference. Figure 6As shown, depending on actual needs, if more slurry tanks need to be rotated at once, the carrier 2 can be designed as two sets, such as a first carrier 23 and a second carrier 24. The first carrier 23 and the second carrier 24 can be located on the same side of the support frame 10, or they can be located on opposite sides of the support frame 10. The first carrier 23 is connected to the first transmission device 121 on the second transmission shaft 120. A transmission device is also provided on the first transmission shaft 110, such as one end of the first transmission shaft 110 being connected to the drive motor 50, and the other end of the first transmission shaft 110 passing through the support frame 10 and sleeved with the fourth transmission device 124. The fourth transmission device 124 is mechanically connected to the second carrier 24. The structures of the first carrier 23 and the second carrier 24 are the same as the structures of the carrier 2 described above. The second carrier 24 is mechanically connected to the fourth transmission device 124. The fourth transmission device 124 is connected to the first transmission device described above. The mechanical structure of the support frame 121 is the same, and it can be a gear drive or a belt drive. That is, a fourth transmission device 124 and a first transmission device 121 are installed at the head and tail ends of the furnace body 1, respectively. The drive motor 50 drives the first turntable 11 to rotate through the first transmission shaft 110. The rotation of the first transmission shaft 110 directly drives the fourth transmission device 124 installed on the first transmission shaft 110 to rotate, thereby driving the second carrier 24 that cooperates with the fourth transmission device 124 to rotate, and then driving the slurry tank in the carrier device to rotate. The rotation of the first turntable 11 indirectly drives the first transmission device 121 to rotate, thereby causing the carrier device 21 to rotate continuously and slowly. Therefore, rotating the first carrier and the second carrier at the same time not only allows more slurry tanks to be continuously and slowly stirred, avoiding more slurry from standing still for a long time, but also further improves the utilization rate of the support frame 10.

[0062] In one embodiment, reference continues... Figure 3 and Figure 4 As shown, the first transmission device 121 includes a first gear body 122 sleeved on the second transmission shaft 120, and a first gear 123 is provided on the first gear body 122 along the circumferential direction.

[0063] The second transmission device 211 includes a second gear body 212 sleeved on the bearing device 21, and the second gear body 212 is provided with a second gear 213 that meshes with the first gear 123 along the circumferential direction.

[0064] The first gear 123 meshes with the second gear 213.

[0065] Specifically, the first transmission device 121 includes a first gear body 122, which is sleeved on the second transmission shaft 120, and a first gear 123 is provided on the first gear body 122 along the circumferential direction.

[0066] The second transmission device 211 includes a second gear body 212, which is sleeved on the outer surface of the bearing device 21. The second gear body 212 is provided with a second gear 213 along the circumferential direction, and the second gear 213 cooperates with the first gear 123.

[0067] The first gear 123 meshes with the second gear 213. Both the first transmission device 121 and the second transmission device 211 are gear drives. The two gear drives are indirectly driven to rotate by the drive motor 50. The two meshing gear drives then drive the bearing device 21 to rotate slowly, so that the paste tank rotates slowly inside the bearing device 21, achieving the effect of paste stirring. By slowly rotating the paste tank, the problem of poor printing-related properties such as paste viscosity can be avoided by allowing the paste to stand for a long time, thereby improving printing quality and increasing the yield. In addition, the use of two meshing gear drives to achieve transmission has the advantages of smooth transmission, simple structure, and low cost.

[0068] It should be noted that the first transmission device 121 and the second transmission device 211 can also be driven by belt drive, as long as the first transmission device 121 and the second transmission device 211 can be connected to drive the carrier 2 to rotate slowly.

[0069] In one embodiment, Figure 7 This is a schematic diagram of the structure of the third transmission shaft and the bearing device provided by the present invention. Figure 8 yes Figure 7 A cross-sectional view of line A-A'; refer to Figure 7 and Figure 8 As shown, the carrier device 21 has an inner wall 214 and an outer wall 215. The thickness of the inner wall 214 along the circumferential direction near the opening 210 is h1, and the thickness of the inner wall 214 along the circumferential direction away from the opening 210 is h2, where h1 > h2. This makes the opening 210 of the carrier device 21 small and the space of the carrier device 21 away from the opening 210 large. This not only prevents the slurry tank from being dropped from the opening 210 during the stirring process, but also allows the carrier device 21 to carry more slurry tanks, allowing more slurry tanks to rotate slowly and increasing the printability of the slurry.

[0070] Optionally, continue to refer to Figure 7 and Figure 8 As shown, the supporting device 21 has an inner wall 214 and an outer wall 215. Along the second direction Z, the thickness of the inner wall 214 gradually decreases on the side near the opening 210. By adopting this scheme, the thickness of the inner wall 214 can be gradually changed. When the slurry tank is placed inside the opening 210, the slurry tank can slide directly inward by utilizing the height difference. When a person places the slurry tank into the supporting device 21, it is not necessary to place the slurry tank directly on the bottom of the supporting device 21.

[0071] Optionally, continue to refer to Figure 8 As shown, the cross-section of the inner wall 214 along the second direction Z is trapezoidal, which prevents the slurry tank from rolling out of the inside of the support device 21 when the support device 21 is rotating, and allows the slurry tank to rotate better inside the support device 21.

[0072] In one embodiment, reference continues... Figure 8 As shown, the bearing device 21 also includes a sleeve 217, and the third drive shaft 218 passes through the sleeve 217 and is fixedly connected to the sleeve 217. The sleeve 217 can make the bearing device 21 more firmly fixed on the third drive shaft 218, making the mechanical transmission more reliable.

[0073] As can be seen from the above embodiments, the energy-saving sintering furnace provided by the present invention achieves at least the following beneficial effects:

[0074] This invention features a second drive shaft housed within a second turntable, which passes through a support frame and is followed by a first drive device. The carrier includes a support rod extending in a second direction and a bearing device extending in a first direction. The bearing device supports at least one slurry tank, and a third drive shaft extending in the first direction is sleeved within it. One end of the third drive shaft is connected to the support rod, and the other end is connected to the support frame. The bearing device has an opening facing the support rod. A second drive device, cooperating with the first drive device, is located on the outer surface of the bearing device. The connection between the first and second drive devices allows the bearing device to rotate slowly, enabling the slurry tank to rotate slowly within the device, achieving continuous and slow stirring of the slurry, increasing its printability, improving printing quality, increasing photovoltaic product yield, and reducing production costs. Furthermore, it enhances the utilization rate of the support frame.

[0075] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. An energy-saving sintering furnace, characterized in that, Including the furnace body and the carrier; The furnace body includes a support frame, and a first turntable and a second turntable are respectively installed at the head and tail ends of the support frame. The first turntable is connected to the second turntable through a furnace belt. A first drive shaft extending along a first direction is provided inside the first turntable. The first direction intersects with the drive direction of the furnace belt. The furnace body also includes a drive motor, which drives the first turntable to rotate via the first transmission shaft; The second turntable is provided with a second drive shaft extending along the first direction, and the second drive shaft passes through the support frame and then a first transmission device is provided. The carrier includes a support rod extending in a second direction and a bearing device extending in a first direction. The bearing device is used to carry at least one sealed container containing slurry. A third drive shaft extending in the first direction is sleeved inside the bearing device, wherein the second direction intersects the first direction. One end of the third drive shaft is connected to the support rod, and the other end of the third drive shaft is connected to the support frame; The bearing device is cylindrical in shape and has an opening on the side facing the support rod. The bearing device has an inner wall and an outer wall. The thickness of the inner wall along the circumferential direction near the opening is h1, and the thickness of the inner wall along the circumferential direction away from the opening is h2, wherein h1 > h2. The outer surface of the bearing device is provided with a second transmission device that cooperates with the first transmission device, and the first transmission device is connected to the second transmission device.

2. The energy-saving sintering furnace according to claim 1, characterized in that, The first transmission device includes a first gear body sleeved on the second transmission shaft, and the first gear body is provided with a first gear along the circumferential direction; The second transmission device includes a second gear body sleeved on the bearing device, and the second gear body is provided with a second gear meshing with the first gear along the circumferential direction; The first gear meshes with the second gear.

3. The energy-saving sintering furnace according to claim 1, characterized in that, Along the second direction, the thickness of the inner wall gradually decreases on the side near the opening.

4. The energy-saving sintering furnace according to claim 3, characterized in that, The cross-section of the inner wall along the second direction is trapezoidal.

5. The energy-saving sintering furnace according to claim 1, characterized in that, The bearing device further includes a sleeve, and the third drive shaft passes through the sleeve and is fixedly connected to the sleeve.

6. The energy-saving sintering furnace according to claim 1, characterized in that, The supporting device is cylindrical in shape.

7. The energy-saving sintering furnace according to any one of claims 1-6, characterized in that, The drive motor is fixed to one side of the support frame.

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