Drying machine for photovoltaic cell

Abstract

The utility model discloses a drying machine for photovoltaic cells, which comprises a heating shell, the heating shell is fixed on a vertical frame, and a drying cavity is defined by the heating shell. And the conveying device comprises two chains which are parallel to each other, the two chains are arranged in a spaced mode in the first direction and can rotate synchronously, the two chains convey the photovoltaic cells in the second direction, the two chains only penetrate through the drying cavity in the second direction, and part of the chains are located in the drying cavity all the time. The hanging lugs are arranged in pairs and used for placing the photovoltaic cells, the multiple pairs of hanging lugs are arranged at intervals in the conveying direction of the conveying device, and any two hanging lugs in pairs are detachably connected with the two chains respectively. The heat flowing out of the heating cavity is little, the heating efficiency is high, and meanwhile conveying of the photovoltaic cell is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell processing equipment, in particular to a drying machine for photovoltaic cells. Background Art

[0002] In the production of photovoltaic cells, after the photovoltaic cells are printed, the photovoltaic cells with slurry need to be dried. The photovoltaic cells are transmitted through a transmission device into a dryer for heating and drying. The transmission device usually adopts a mesh chain structure for transmission, and the mesh chain structure includes two synchronously rotating chains. However, the mesh chain structure is prone to shaking, which will affect the quality of the photovoltaic cells. In addition, during the transmission process, the mesh chain structure contacts the entire surface of the photovoltaic cells, which is easy to cause surface contamination of the photovoltaic cells, thereby affecting the quality of the photovoltaic cells. Therefore, a connecting rod is set on the mesh chain structure, and a hanging ear for supporting the photovoltaic cell is integrally formed on the connecting rod. The existing hanging ear and connecting rod are a whole, and the weight is heavy, so the chain will bear a large weight. Therefore, due to the stability requirements of the mesh chain structure, the chain will be guided by a pressure piece outside the heating chamber to improve the stability of the chain support. At this time, a channel for the connecting rod to pass through will be opened on the shell, which will cause the heat of the heating chamber to flow out, affecting the heating efficiency. The connecting rod passing through the heating chamber will cause heat to flow out and excessive heat loss. Utility Model Content

[0003] In order to overcome the above shortcomings, the purpose of the utility model is to provide a drying machine for photovoltaic cells, which has less heat outflow from the heating cavity, high heating efficiency and stable transportation of photovoltaic cells.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a photovoltaic cell drying machine, comprising:

[0005] A heating shell, the heating shell is fixed on the stand, and the heating shell defines a drying cavity;

[0006] A conveying device, wherein the conveying device comprises two parallel chains, the two chains are spaced apart in a first direction and can rotate synchronously, the two chains convey the photovoltaic cells in a second direction, the two chains only pass through the drying chamber in the second direction and a part of the chains are always located in the drying chamber;

[0007] The hanging ears are arranged in pairs and are used to place photovoltaic cells. A plurality of pairs of the hanging ears are arranged at intervals along the conveying direction of the conveying device. Any two of the hanging ears in a pair are detachably connected to two chains respectively.

[0008] The beneficial effects of the utility model are:

[0009] 1. The two chains will not pass through the drying chamber in the first direction. In this case, the drying chamber does not need to have a passage for the chains to pass through, which reduces the heat leakage in the drying chamber and is more energy-efficient.

[0010] Second, the photovoltaic cell is supported by providing a pair of hanging ears, and the pair of hanging ears supports the photovoltaic cell along the first direction. The pair of hanging ears is a split structure, not an integral part, and is detachable from the corresponding chain. When replacement is needed, only the corresponding hanging ears need to be replaced, which saves costs.

[0011] Furthermore, the maximum distance between the two chains in the first direction is smaller than the minimum distance between the two chains in the first direction, so as to ensure that the drying chamber can accommodate the chains therein and the chains will not pass through the drying chamber in the first direction.

[0012] Furthermore, the two chains and the drying chamber are symmetrically arranged relative to a vertical plane extending along the second direction. At this time, the photovoltaic cell is centered in the drying chamber and is heated evenly.

[0013] Furthermore, each of the chains comprises:

[0014] Chain plates, the chain plates are arranged in pairs, any two chain plates in a pair are arranged at intervals along a first direction, and two adjacent pairs of chain plates are hingedly connected by connecting pins;

[0015] A bent plate is fixedly connected to the chain plate, the bent plate extends toward another chain along a first direction and a gap is left between the bent plate and the bent plate on the other chain, and the bent plate is detachably connected to the hanging ear. The hanging ear is fixed to the chain plate through the bent plate, so that the hanging ear and the chain plate move synchronously.

[0016] Furthermore, each of the hanging ears comprises:

[0017] The connecting plate is detachably connected to the bent plate, and the connecting plate provides a larger supporting surface for the supporting frame, making it easier to fix the supporting frame on the bent plate.

[0018] The support frame is fixed on the upper end surface of the connecting plate, and the support frame includes an inclined surface for supporting the photovoltaic cells. The structure of the inclined surface can guide the photovoltaic cells and can be used to place photovoltaic cells of different sizes.

[0019] Specifically, the support frame includes a tilting rod and a vertical rod, the lower end of the tilting rod is fixedly connected to the connecting plate, the upper end of the tilting rod is fixed to the connecting plate through the vertical rod, and the upper end surface of the tilting rod is an inclined surface. The support frame adopts a rod-shaped structure, and the inclined surface area is small, that is, the contact area between the support frame and the photovoltaic cell is small, which reduces the wear on the photovoltaic cell.

[0020] Furthermore, the conveying device further includes a plurality of support rods located between the two chains, the support rods corresponding to the connecting pins and coaxially arranged, and the two ends of the support rods are respectively connected to the corresponding connecting pins of the two chains. The arrangement of the support rods improves the stability of the entire conveying chain, allowing the two chains to form a whole, avoiding chain swinging, and providing stability for the transportation of photovoltaic cells.

[0021] Furthermore, a rotatable roller is sleeved on the connecting pin.

[0022] Furthermore, the heating shell is provided with an inlet and an outlet at both ends along the second direction, and the chain enters the drying chamber from the inlet and leaves the drying chamber from the outlet;

[0023] The inlet and the opening are both hinged with a door body, and the door body swings up and down under the driving of a corresponding driving member, and the door body is always located above the chain.

[0024] The door is usually in a closed state to reduce the heat dissipation in the drying chamber.

[0025] Furthermore, the conveying device also includes a driving assembly, which is used to drive the two chains to rotate synchronously, and the driving assembly is located outside the drying chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0027] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the chain in the embodiment of the utility model;

[0029] Figure 4 It is a side view of an embodiment of the utility model.

[0030] In the figure:

[0031] 1. Heating shell; 11. Door body; 2. Stand; 3. Conveying device; 31. Chain; 311. Chain plate; 312. Bending plate; 313. Roller; 32. Support rod; 4. Hanging ear; 41. Connecting plate; 42. Carrying frame; 421. Tilt rod; 422. Vertical rod. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0033] See attached Figure 1 As shown, a photovoltaic cell drying machine of the utility model comprises a stand 2, a heating shell 1 and a conveying device 3, wherein the heating shell 1 is fixed on the stand 2 and defines a drying chamber. The conveying device 3 is used to convey photovoltaic cells, and conveys the photovoltaic cells of the previous station into the drying chamber for drying.

[0034] The conveying device 3 includes two parallel chains 31, which are arranged at intervals along the first direction (Y direction) and can rotate synchronously. The two chains 31 convey the photovoltaic cells along the second direction (X direction). The two chains 31 only pass through the drying chamber along the second direction, and part of the chains 31 are always located in the drying chamber. In other words, the two chains 31 will not pass through the drying chamber in the first direction. At this time, the drying chamber does not need to open a channel for the chains 31 to pass through, thereby reducing the heat leakage in the drying chamber.

[0035] The conveying device 3 also includes hanging ears 4, which are arranged in pairs and are used to place photovoltaic cells. Multiple pairs of the hanging ears 4 are arranged at intervals along the conveying direction of the conveying device 3, and any two pairs of the hanging ears 4 are detachably connected to the two chains 31. The photovoltaic cells are supported by setting the hanging ears 4, and a pair of hanging ears 4 supports the photovoltaic cells along the first direction. The pair of hanging ears 4 is a split structure, not an integral part, and is detachable from the corresponding chain 31. When replacement is needed, only the corresponding hanging ears 4 need to be replaced.

[0036] See attached Figure 4 As shown, the conveying device 3 also includes a driving assembly, which is used to drive the two chains 31 to rotate synchronously, and the driving assembly is located outside the drying chamber. The driving assembly includes a rotating driving member and two sets of gear sets. The two chains 31 are respectively wound around the two gear sets and mesh with the gears in the gear sets. Each set of gear sets includes a driving gear and multiple driven gears, two pairs of driving gears and multiple pairs of driven gears. A pair of driving gears is connected by a transmission rod, and the rotating driving member drives the transmission rod to rotate, driving the two driving gears to rotate. When the rotating driving member drives the transmission rod to rotate, it can drive the chain 31 to rotate through the driving gear, thereby transmitting the photovoltaic cell.

[0037] The maximum distance between the two chains 31 in the first direction is smaller than the minimum distance between the drying chamber in the first direction, so as to ensure that the drying chamber can accommodate the chains 31 therein and the chains 31 will not pass through the drying chamber in the first direction.

[0038] In one embodiment, the drying chamber is a rectangular parallelepiped, and the two chains 31 and the drying chamber are symmetrically arranged relative to a vertical plane extending along the second direction. At this time, the photovoltaic cell is centered in the drying chamber and is heated evenly.

[0039] A plurality of heating tubes are fixed in the drying chamber, and the heating tubes are arranged at intervals along the second direction. There are heating tubes fixed in the drying chamber above and below the chain to heat the drying chamber.

[0040] See attached Figure 2 As shown, each of the chains 31 includes a chain plate 311 and a bent plate 312, the chain plates 311 are arranged in pairs, and any pair of two chain plates 311 are arranged at intervals along the first direction, and two adjacent pairs of chain plates 311 are hinged by connecting pins. The bent plate 312 is fixedly connected to the chain plate 311, and the bent plate 312 extends toward another chain 31 along the first direction and a gap is left between the bent plate 312 on the other chain 31, and the bent plate 312 and the hanging ear 4 are detachably connected.

[0041] The hook 4 is fixed to the chain plate 311 through the bent plate 312, so that the hook 4 and the chain plate 311 move synchronously. The bent plate 312 and the chain plate 311 are integrally formed. The bent plate 312 and the corresponding chain plate 311 are perpendicular to form an L structure, and a metal plate can be bent to form the structure of the chain plate 311 and the bent plate 312.

[0042] In one embodiment, each of the hanging ears 4 includes a connecting plate 41 and a supporting frame 42, and the connecting plate 41 is detachably connected to the bent plate 312. The supporting frame 42 is fixed to the upper end surface of the connecting plate 41, and the supporting frame 42 includes an inclined surface for supporting the photovoltaic cell. The connecting plate 41 provides a larger supporting surface for the supporting frame 42, which facilitates fixing the supporting frame 42 on the bent plate 312.

[0043] In one embodiment, the connecting plate 41 is detachably connected to the bent plate 312. For example, a bolt connection, a positioning pin connection, a block connection, etc. are used, which facilitates the disassembly of the connecting plate 41. When the carrier 42 needs to be replaced, the connecting plate 41 can be directly removed from the bent plate 312, and then a new connecting plate 41 is fixed to the bent plate 312.

[0044] In one embodiment, the projection of the connecting plate 41 on the bent plate 312 completely overlaps with the bent plate 312 , that is, the bent plate 312 and the connecting plate 41 have the same size, and the connection between the two is stable and low in cost.

[0045] See attached Figure 3 As shown, the support frame 42 includes a tilting rod 421 and a vertical rod 422. The lower end of the tilting rod 421 is fixedly connected to the connecting plate 41, and the upper end of the tilting rod 421 is fixed to the connecting plate 41 through the vertical rod 422. The upper end surface of the tilting rod 421 is an inclined surface. The support frame 42 adopts a rod-shaped structure, and the inclined surface area is small, that is, the contact area between the support frame 42 and the photovoltaic cell is small, which reduces the wear on the photovoltaic cell. The support frame and the connecting plate are welded and fixed.

[0046] See attached Figure 3 As shown, the conveying device 3 also includes a plurality of support rods 32 located between the two chains 31, the support rods 32 correspond to the connecting pins and are coaxially arranged, and the two ends of the support rods 32 are respectively connected to the corresponding connecting pins of the two chains 31. The arrangement of the support rods 32 improves the stability of the entire conveying chain, allows the two chains 31 to form a whole, avoids the swing of the chains 31, and provides stability for the transportation of the photovoltaic cells.

[0047] In one embodiment, the connecting pin is also sleeved with a rotatable roller 313. The roller 313 is provided with a central hole for the connecting pin to pass through, and the diameter of the central hole is larger than the outer diameter of the connecting pin, that is, there is a gap between the roller 313 and the connecting pin, so that the roller 313 can rotate smoothly.

[0048] See attached Figure 2 As shown, the heating housing 1 is provided with an inlet and an outlet at both ends along the second direction, and the chain 31 enters the drying chamber from the inlet and leaves the drying chamber from the outlet. The inlet and the opening are both hinged with a door body 11, which swings up and down under the drive of a corresponding driving member, and the door body 11 is always located above the chain 31.

[0049] The door 11 is usually in a closed state to reduce the heat dissipation in the drying cavity. When the dryer is abnormal or the dryer is repaired or maintained, the door is opened to measure the temperature of the drying cavity.

[0050] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A drying machine for photovoltaic cells, characterized in that: include: A heating shell, the heating shell is fixed on the stand, and the heating shell defines a drying cavity; A conveying device, wherein the conveying device comprises two parallel chains, the two chains are spaced apart in a first direction and can rotate synchronously, the two chains convey the photovoltaic cells in a second direction, the two chains only pass through the drying chamber in the second direction and a part of the chains are always located in the drying chamber; The hanging ears are arranged in pairs and are used to place photovoltaic cells. A plurality of pairs of the hanging ears are arranged at intervals along the conveying direction of the conveying device. Any two of the hanging ears in a pair are detachably connected to two chains respectively.

2. The photovoltaic cell drying machine according to claim 1, characterized in that: The maximum distance between the two chains in the first direction is smaller than the minimum distance between the two drying chambers in the first direction.

3. The photovoltaic cell drying machine according to claim 1, characterized in that: The two chains and the drying chamber are symmetrically arranged relative to a vertical plane extending along the second direction.

4. The photovoltaic cell drying machine according to any one of claims 1 to 3, characterized in that: Each of the chains comprises: Chain plates, the chain plates are arranged in pairs, any two chain plates in a pair are arranged at intervals along a first direction, and two adjacent pairs of chain plates are hingedly connected by connecting pins; A bent plate, wherein the bent plate is fixedly connected to the chain plate, the bent plate extends toward another chain along a first direction and a distance is left between the bent plate and the bent plate on the other chain, and the bent plate and the hanging ear are detachably connected.

5. The photovoltaic cell drying machine according to claim 4, characterized in that: Each of the hanging ears comprises: A connecting plate, wherein the connecting plate is detachably connected to the bent plate; A support frame is fixed on the upper end surface of the connecting plate, and the support frame includes an inclined surface for supporting the photovoltaic cells.

6. The photovoltaic cell drying machine according to claim 5, characterized in that: The support frame includes a tilting rod and a vertical rod, the lower end of the tilting rod is fixedly connected to the connecting plate, the high end of the tilting rod is fixed to the connecting plate through the vertical rod, and the upper end surface of the tilting rod is an inclined surface.

7. The photovoltaic cell drying machine according to claim 4, characterized in that: The conveying device also includes a plurality of support rods located between the two chains. The support rods correspond to the connecting pins and are coaxially arranged. Both ends of the support rods are respectively connected to the corresponding connecting pins of the two chains.

8. The photovoltaic cell drying machine according to claim 4, characterized in that: The connecting pin is also sleeved with a rotatable roller.

9. The photovoltaic cell drying machine according to claim 1, characterized in that: The heating shell is provided with an inlet and an outlet at both ends along the second direction, and the chain enters the drying chamber from the inlet and leaves the drying chamber from the outlet; The inlet and the opening are both hinged with a door body, and the door body swings up and down under the driving of a corresponding driving member, and the door body is always located above the chain.

10. The photovoltaic cell drying machine according to claim 1, characterized in that: The conveying device further comprises a driving assembly, which is used to drive the two chains to rotate synchronously, and the driving assembly is located outside the drying chamber.

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