Tunnel vacuum drying system

Abstract

The utility model discloses a tunnel vacuum drying system which comprises a vacuum system and a drying system. The drying system comprises a drying assembly used for drying the workpieces based on radiation heating and a conveying assembly used for conveying the workpieces into the drying assembly to be dried and then conveying the workpieces out. Wherein the drying system performs multidirectional drying treatment on workpieces in a heating and vacuumizing mode, so that the drying time is shortened; in addition, the workpieces can move in the drying cavity in the drying process, heating is more uniform, the risk that the local temperature of the workpieces is too high is reduced, the drying efficiency is improved, energy consumption and production cost are reduced, and meanwhile the yield of the workpieces is improved; in addition, the multiple drying cavities are vertically stacked, the height of the conveying assembly is adjusted by arranging the lifting mechanism, the overall equipment length of the tunnel vacuum drying system can be reduced, and the occupied area of the equipment is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell production and manufacturing, in particular to a tunnel vacuum drying system. Background Art

[0002] At present, in the process of processing solar cells, multiple processing steps are required, including the drying step of the solar cells. When drying solar cells, traditional drying devices are mainly composed of circulating fans, heating devices, tanks, pipes, etc. The cells need to be placed in the drying tank, and the circulating fans outside the tank work at the same time, blowing and drying the cells in the tank through heating and hot air circulation. However, the hot air circulation method requires a long drying time and has low drying efficiency. Moreover, a tank usually needs to be equipped with multiple circulating fans, which has high energy consumption and high production costs. Moreover, because the fans are external, the drying device is too large, resulting in a large footprint. In addition, the gas source for hot air circulation is mainly workshop air, which is not clean enough. When the hot air passes through the cells, it is easy to cause cell contamination, oxidation and other problems, affecting the yield rate.

[0003] Patent application publication number CN 118066832 A discloses a drying device and a drying method. Multiple drying boxes are installed within the drying device to accommodate and dry multiple flower baskets. A transfer device is also provided to move the flower baskets along a transfer trajectory for drying. While this method ensures that each flower basket undergoes the same number of drying cycles, it takes a long time and results in low drying efficiency. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a tunnel vacuum drying system, which occupies a small area and can dry workpieces efficiently.

[0005] The technical solution of the utility model to solve the above problems is as follows:

[0006] A tunnel vacuum drying system comprises a vacuum system and a drying system; the drying system comprises a drying component for drying workpieces based on radiant heating and a conveying component for conveying the workpieces into the drying component for drying and then conveying the workpieces out; the conveying component comprises a first conveying component for sequentially conveying one or more workpieces to be dried into the drying component, a first translation component for sequentially conveying the workpieces during the drying process, and a second translation component for sequentially conveying the workpieces after drying is completed; the drying component comprises a drying chamber and an opening and closing device for opening and closing the drying chamber; the vacuum system comprises a vacuum pumping joint having one end connected to the drying chamber and the other end connected to an external vacuum pumping device.

[0007] Preferably, the radiation heating method is selected from at least one of resistance wire heat radiation and infrared heat radiation.

[0008] Preferably, the drying component includes a heating device arranged in the drying chamber.

[0009] Preferably, the heating device may be arranged above or below the first translation assembly, or heating devices may be arranged above and below the translation assembly.

[0010] When the heating device is set above, it is necessary to ensure that when the workpiece is placed in the drying chamber, the heating device is located above the workpiece in the drying chamber.

[0011] Preferably, the drying chamber is provided with two openings, which are respectively arranged in two opposite side surfaces of the drying chamber.

[0012] Preferably, the opening and closing device comprises a door placed in the opening.

[0013] When the opening and closing device controls the door to open, the opening is in an open state, and the workpiece can enter or leave the drying chamber. When the opening and closing device controls the door to close, the opening is closed and the drying chamber is sealed.

[0014] Preferably, the door can be opened and closed by rotation or by movement; and the door can be opened and closed by upward or downward directions.

[0015] In this application, upward opening means: if the door is opened and closed by rotation, the rotation axis is set above the door; if the door is opened and closed by movement, the door is in an open state when it moves upward; otherwise, it is downward opening.

[0016] The tunnel refers to the process where the workpiece enters the drying chamber from an opening on one side and leaves the drying chamber from an opening on the other side after being dried.

[0017] Preferably, the first transport assembly includes a first workpiece platform arranged horizontally and a first transport device arranged above the workpiece platform.

[0018] Preferably, there are multiple drying chambers, and the multiple drying chambers are arranged in a vertically aligned manner based on the same frame.

[0019] Preferably, the first transport assembly is arranged on the first lifting mechanism.

[0020] The first lifting mechanism can lift the first conveying assembly to a suitable height so as to receive the workpieces transported by the front loading device, and then lift the first conveying assembly to the same height as the drying chamber.

[0021] Preferably, the first conveying assembly is arranged on a first lifting mechanism; the first lifting mechanism has a lifting stroke that is not less than the height of the drying assembly.

[0022] The first lifting mechanism raises the first conveyor assembly to the appropriate height to receive workpieces from the loading device in front, and then raises the first conveyor assembly to the same height as the drying chamber. When multiple drying chambers are arranged vertically, the first lifting mechanism must ensure that its lifting range is no less than the height of the drying assembly to ensure that workpieces can be loaded into any drying chamber.

[0023] Preferably, the transport assembly further comprises a second transport assembly docked with the first translation assembly for sequentially transferring the dried workpiece(s) to the second translation assembly.

[0024] Preferably, the second transport assembly includes a horizontally arranged second workpiece platform and a second transport device arranged above the workpiece platform.

[0025] Preferably, the second conveying assembly is arranged on a second lifting mechanism; the second lifting mechanism has a lifting stroke that is not less than the height of the drying assembly.

[0026] Preferably, the first lifting mechanism is connected to a first transverse movement device for driving the first lifting mechanism to move closer to or away from the drying chamber.

[0027] Preferably, the second lifting mechanism is connected to a second transverse movement device for driving the second lifting mechanism to move closer to or away from the drying chamber and the second translation assembly.

[0028] Preferably, a weighing device for weighing the workpiece is provided below the second translation assembly.

[0029] Preferably, the vacuum system further comprises a vacuum breaking joint having one end connected to the drying chamber and the other end connected to an external vacuum breaking device.

[0030] The utility model has the following beneficial effects:

[0031] (1) In the tunnel vacuum drying system of the present invention, the drying system uses heating and vacuuming to dry the workpiece in all directions, which shortens the drying time. In addition, the workpiece can move in the drying chamber during the drying process, and the heating is more uniform, which reduces the risk of local overtemperature of the workpiece, improves the drying efficiency, reduces energy consumption and production costs, and improves the yield rate of the workpiece.

[0032] (2) When there are multiple drying chambers, vertical stacking is adopted. When the workpieces enter different drying chambers, they do not interfere with each other, and multiple batches of workpieces can be dried at the same time, which reduces the entire production cycle and can meet the requirements of large production capacity.

[0033] In addition, the vertical stacking of multiple drying chambers and the adjustment of the height of the conveying components by setting up a lifting mechanism can reduce the overall equipment length of the tunnel vacuum drying system, save equipment floor space, reduce the clean plant area and usage costs, and further reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a tunnel vacuum drying system disclosed in an embodiment of the present utility model;

[0035] In the figure: 1-workpiece, 21-first conveying assembly, 211-first workpiece platform, 212-first conveying device, 22-first translation assembly, 23-second conveying assembly, 24-second translation assembly, 31-drying chamber, 32-opening and closing device, 33-heating device, 41-first lifting mechanism, 42-first lifting mechanism, 51-first transverse movement device, 52-second transverse movement device, 6-weighing device. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to illustrate the present invention and are not exhaustive embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] A tunnel vacuum drying system, such as Figure 1 As shown, the drying system includes a drying system and a vacuum system for drying workpieces 1. The drying system includes a drying assembly and a conveying assembly. The conveying assembly includes a first conveying assembly 21, a second conveying assembly 23, a first translation assembly 22, and a second translation assembly 24. The first conveying assembly 21 is used to sequentially transport one or more workpieces 1 to be dried into the drying assembly, the second conveying assembly 23 is used to sequentially transport one or more dried workpieces 1 to the second translation assembly 24, the first translation assembly 22 is used to sequentially transport the workpieces 1 during the drying process, and the second translation assembly 24 is used to sequentially transport the workpieces 1 to the discharge station after drying.

[0038] The drying assembly includes a drying chamber 31 for accommodating the workpiece 1. The number of the drying chambers 31 can be set to one or more according to actual needs. When there are multiple drying chambers 31, the multiple drying chambers 31 are arranged in vertical alignment based on the same frame.

[0039] Each drying chamber 31 is provided with an opening and an opening-closing device 32 on opposite sides. The opening-closing device 32 includes a door disposed within the opening. The opening-closing device 32 controls the opening and closing of the door to open or close the opening. For example, when the opening-closing device 32 controls the door to open, the opening is open, allowing the workpiece 1 to enter or exit the drying chamber 31. When the workpiece 1 within the drying chamber 31 needs to be dried, the opening-closing device 32 controls the door to close, sealing the drying chamber 31. The door can be opened and closed by rotation or movement, and can open upward or downward. "Upward opening" here means that if the door is opened and closed by rotation, the rotation axis is located above the door; if the door is opened and closed by movement, the door is opened when it moves upward; otherwise, it opens downward. In this embodiment, the opening-closing device 32 controls the door to open upward by rotation to prevent the opening-closing device 32 from interfering with the transport of the workpiece 1.

[0040] The first translation assembly 22 is disposed within the drying chamber 31. A heating device 33 is also provided within the drying chamber 31 for drying the workpiece 1 within the drying chamber 31. The heating device 33 can be disposed above or below the first translation assembly 22, or both above and below the first translation assembly 22. When the heating device 33 is disposed above the first translation assembly 22, it must be ensured that when the workpiece 1 is placed in the drying chamber 31, the heating device 33 is positioned above the workpiece 1 within the drying chamber 31.

[0041] The drying system includes a vacuum joint, one end of which communicates with the drying chamber 31 and the other with an external vacuum pump, and a vacuum breaker, one end of which communicates with the drying chamber 31 and the other with an external vacuum breaker. The vacuum joint is used to extract air from the drying chamber 31, creating a vacuum state and facilitating the rapid removal of moisture. The vacuum breaker is used to inflate the drying chamber 31 after a period of vacuum drying, creating heat convection within the drying chamber 31 and enhancing the drying effect.

[0042] The first conveyor assembly 21 is mounted on a first lifting mechanism 41. The first lifting mechanism 41 raises the first conveyor assembly 21 to a suitable height, enabling it to dock with the loading device, thereby receiving the workpiece 1 transported by the loading device in front; and also allowing it to reach the same height as the opening of the drying chamber 31, allowing the workpiece 1 to enter the drying chamber 31. In this embodiment, the first conveyor assembly 21 includes a first workpiece platform 211 mounted on the first lifting mechanism 41 and a first conveying device 212 mounted above the workpiece platform 211. The workpiece 1 can be placed above the first conveying device 212.

[0043] The first lifting mechanism 41 is mounted on the guide rail and is connected to a first transverse movement device 51. The first transverse movement device 51 can control the movement of the first lifting mechanism 41 on the guide rail, moving it closer to or further away from the opening of the drying chamber 31, thereby enabling the first conveyor assembly 21 to receive the workpiece 1 transported by the front loading device or to transfer the workpiece 1 in the first conveyor assembly 21 into the drying chamber 31.

[0044] The second conveyor assembly 23 is mounted on a second lifting mechanism 42, which is positioned between the drying chamber 31 and the second translation assembly 24. The second lifting mechanism 42 raises the second conveyor assembly 23 to an appropriate height, enabling it to reach the same level as the opening of the drying chamber 31 and receive the dried workpieces 1 within the drying chamber 31. Furthermore, the second conveyor assembly 23 connects with the second translation assembly 24, allowing the workpieces 1 to be sequentially transferred to the second translation assembly 24. In this embodiment, the second conveyor assembly 23 comprises a second workpiece platform mounted on the second lifting mechanism 42 and a second conveying device positioned above the second workpiece platform. Workpieces 1 can be placed above the second conveying device.

[0045] The second lifting mechanism 42 is also mounted on the guide rails and is connected to a second transverse movement device 52. The second transverse movement device 52 can control the movement of the second lifting mechanism 42 on the guide rails, moving the second lifting mechanism 42 closer to or further away from the opening of the drying chamber 31 and the second translation assembly 24, thereby enabling the second transport assembly 23 to transfer the workpiece 1 in the drying chamber 31 to the second translation assembly 24.

[0046] The second translation assembly 24 receives the workpieces 1 transferred by the second conveying assembly 23 and sequentially conveys them to the unloading station. A weighing device 6 is provided below the second conveying assembly 23 for weighing the workpieces 1 conveyed by the second translation assembly 24 .

[0047] The operation mode of the tunnel vacuum drying system disclosed in the embodiment of the utility model is as follows:

[0048] S1. The opening and closing device 32 opens the drying chamber 31. The first transverse moving device 51 moves the first lifting mechanism 41 close to the drying chamber 31. The first lifting mechanism 41 docks the first conveying assembly 21 with the first translation assembly 22. The first conveying assembly 21 delivers the workpiece 1 into the drying chamber 31.

[0049] Specifically, the first conveyor assembly 21 receives the workpiece 1 processed in the previous step. The opening and closing device 32 opens the door at the opening. The first transverse movement device 51 moves the first lifting mechanism 41 along the guide rail to a position close to the drying chamber 31. The first lifting mechanism 41 lifts the first conveyor assembly 21 to the same height as the opening of any drying chamber 31 and docks with the drying chamber 31. At this point, the first conveyor assembly 21 and the first translation assembly 22 transport the workpiece 1 into the drying chamber 31. The first lifting mechanism 41 then returns to its initial position, ready to receive the next batch of workpieces 1.

[0050] S2, the opening and closing device 32 closes the drying chamber 31, and the drying component and the vacuum system dry the workpiece 1;

[0051] Specifically, after the workpiece 1 arrives at the drying chamber 31, the opening and closing device 32 closes the door, closing the opening of the drying chamber 31 and sealing it. At this time, the heating device 33 and the vacuum device are turned on to dry the workpiece 1. Alternatively, the heating device 33 can be turned on before the workpiece 1 enters the drying chamber 31. The heating device 33 and the vacuum device can be turned on at the same time or intermittently at different times. When the workpiece 1 is dried in the drying chamber 31, it can be stationary or moved horizontally in the drying chamber 31 under the drive of the first translation assembly 22. When the process time is reached, the vacuum breaking device is started to allow air to enter the drying chamber 31. After the vacuum breaking is completed, the opening and closing device 32 opens the door of the drying chamber 31.

[0052] S3: The opening and closing device 32 opens the drying chamber 31, and the second transverse moving device 52 moves the second lifting mechanism 42 closer to the drying chamber 31. The second lifting mechanism 42 docks the second conveying assembly 23 with the first translation assembly 22, and the first translation assembly 22 moves the workpiece 1 out of the drying chamber 31.

[0053] Specifically, at this time, the second transport assembly 23 has reached the height corresponding to the drying chamber 31 under the control of the second lifting mechanism 42 and has completed docking with the drying chamber 31; the first translation assembly 22 and the second transport assembly 23 move the workpiece 1 that has completed the drying process in the drying chamber 31 into the second transport assembly 23;

[0054] S4. The second transverse moving device 52 moves the second lifting mechanism 42 closer to the second translation assembly 24. The second lifting mechanism 42 docks the second conveying assembly 23 with the second translation assembly 24. The second translation assembly 24 transfers the workpiece 1 to the material retrieving station. The weighing device 6 weighs and measures the workpiece 1.

[0055] Specifically, after all the workpieces 1 in the drying chamber 31 have arrived at the second conveying assembly 23, the second lifting mechanism 42, driven by the second transverse device 52, moves along the guide rail to a position where it docks with the second translation assembly 24. The second lifting mechanism 42 controls the second conveying assembly 23 to a position at the same height as the second translation assembly 24.

[0056] At this time, the second translation assembly 24 transfers the workpiece 1 in the second conveying assembly 23 to the unloading station. When the workpiece 1 on the second translation assembly 24 passes the position of the weighing device 6 set below the second translation assembly 24, the second translation assembly 24 stops, and the weighing device 6 starts to weigh and record the workpiece 1 above it. After the weighing is completed, the second translation assembly 24 starts to transfer the workpiece 1 to the unloading station to facilitate the device of the next process to grab the workpiece 1.

[0057] In the tunnel vacuum drying system of the present invention, multiple cavities are stacked vertically and do not interfere with each other, so the drying system can dry multiple batches of workpieces 1 at the same time, reducing the entire production rhythm and meeting the requirements of large production capacity; and by adopting a heating combined with vacuuming method to perform multi-directional drying treatment on the workpiece 1, the drying time can be shortened, thereby improving the drying efficiency; in addition, the multiple drying chambers 31 are stacked vertically, and the height of the conveying component is adjusted by setting a lifting mechanism, which can reduce the overall length of the drying system, save equipment floor space, and reduce the clean workshop area and usage costs.

Claims

1. A tunnel vacuum drying system, comprising a vacuum system and a drying system; the drying system comprises a drying component for drying a workpiece (1) based on radiant heating and a conveying component for conveying the workpiece (1) into the drying component for drying and then conveying the workpiece (1) out; the conveying component comprises a first conveying component (21) for sequentially conveying one or more workpieces (1) to be dried into the drying component, a first translation component (22) for sequentially conveying the workpiece (1) during the drying process, and a second translation component (24) for sequentially conveying the workpiece (1) after drying is completed; the characteristics are: The drying assembly comprises a drying chamber (31) and an opening and closing device (32) for opening and closing the drying chamber (31); the vacuum system comprises a vacuum joint having one end connected to the drying chamber (31) and the other end connected to an external vacuuming device.

2. The tunnel vacuum drying system according to claim 1, characterized in that: There are multiple drying chambers (31), and the multiple drying chambers (31) are arranged in a vertically aligned manner based on the same frame.

3. The tunnel vacuum drying system according to claim 1, characterized in that: The first transport assembly (21) is arranged on the first lifting mechanism (41).

4. The tunnel vacuum drying system according to claim 2, characterized in that: The first conveying assembly (21) is arranged on a first lifting mechanism (41); the first lifting mechanism (41) has a lifting stroke that is not less than the height of the drying assembly.

5. The tunnel vacuum drying system according to claim 2, characterized in that: The transport assembly further comprises a second transport assembly (23) docked with the first translation assembly (22) for sequentially transferring the dried one or more workpieces (1) to the second translation assembly (24).

6. The tunnel vacuum drying system according to claim 5, characterized in that: The second conveying assembly (23) is arranged on a second lifting mechanism (42); the second lifting mechanism (42) has a lifting stroke that is not less than the height of the drying assembly.

7. The tunnel vacuum drying system according to claim 4, characterized in that: The first lifting mechanism (41) is connected to a first transverse movement device (51) for driving the first lifting mechanism (41) to move closer to or away from the drying chamber (31).

8. The tunnel vacuum drying system according to claim 6, characterized in that: The second lifting connection is provided with a second transverse movement device (52) for driving the second lifting mechanism (42) to move closer to or away from the drying chamber (31) and the second translation assembly (24).

9. The tunnel vacuum drying system according to claim 1, characterized in that: A weighing device (6) for weighing the workpiece (1) is provided below the second translation assembly (24).

10. The tunnel vacuum drying system according to claim 1, characterized in that: The vacuum system further comprises a vacuum breaking joint having one end connected to the drying chamber (31) and the other end connected to an external vacuum breaking device.

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