A drying device for producing perovskite quantum dots

Abstract

The application relates to a drying device for perovskite quantum dot production and relates to the nanocrystal processing technical field, which comprises a box body, a drying fan is fixedly installed on the box body, a shaking tray is horizontally slidably arranged in the box body, a screening mechanism for driving the shaking tray to reciprocatingly slide is arranged in the box body, a feeding mechanism is arranged at the top of the box body, and the feeding mechanism is used for conveying perovskite quantum dots to the shaking tray. The application has the effects of avoiding perovskite quantum dots in the stacking state to perform drying, improving the drying effect of the material, and improving the drying efficiency.

Description

Technical Field

[0001] This application relates to the field of nanocrystal processing technology, and in particular to a drying apparatus for the production of perovskite quantum dots. Background Technology

[0002] Perovskite quantum dots, also known as nanocrystals, refer to crystalline materials at the nanoscale, or nanoparticles with crystalline structures. Nanocrystals are of significant research value. The electrical and thermodynamic properties of nanocrystals exhibit strong size dependence, allowing these properties to be controlled through meticulous fabrication processes. Nanocrystals can provide the crystalline structure of individual monomers; studying these monomeric structures can provide information to explain the behavior of macroscopic samples of similar materials, without considering complex grain boundaries and other crystal defects. Semiconductor nanocrystals with dimensions smaller than 10 nanometers are commonly referred to as quantum dots.

[0003] The production of perovskite quantum dots requires a drying process. Commonly used drying equipment simply uses hot air drying. During the drying process, the material piles up, resulting in low internal drying efficiency and affecting the overall drying efficiency. Utility Model Content

[0004] In order to minimize the drying of perovskite quantum dots in a stacked state and improve the drying effect and efficiency of the material, this application provides a drying device for the production of perovskite quantum dots.

[0005] The drying apparatus for perovskite quantum dot production provided in this application adopts the following technical solution: A drying device for producing perovskite quantum dots includes a housing, on which a drying fan is fixedly installed. A shaking disc is horizontally slidable inside the housing. A screening mechanism is provided inside the housing to drive the shaking disc to slide back and forth. A feeding mechanism is provided on the top of the housing for feeding perovskite quantum dots to the shaking disc.

[0006] By adopting the above technical solution, the drying fan introduces hot air into the chamber to provide a drying heat source, the feeding mechanism quantitatively delivers perovskite quantum dots into the shaking disc to prevent excessive material accumulation in the shaking disc, and the screening mechanism drives the shaking disc to slide horizontally back and forth, so that the material in the shaking disc is continuously dispersed and turned over. In this way, the perovskite quantum dots are dried in a state of accumulation as much as possible, thereby improving the drying effect and efficiency of the material.

[0007] Preferably, the shaking tray includes a tray and a frame, the frame being horizontally slidably connected to the box body, the tray being rotatably connected to the frame, and a deflection mechanism being provided inside the box body to drive the tray to rotate. The tray abuts against the bottom of the frame and seals the bottom of the frame.

[0008] By adopting the above technical solution, the frame serves to contain the material and prevent it from spilling out from the edge of the pallet during the sliding of the shaking disc. After the material is dried, the deflection mechanism drives the pallet to rotate around the hinge point with the frame, causing the pallet to deflect downwards and tilt, thereby pouring out the dried material from the shaking disc.

[0009] Preferably, the screening mechanism includes a crankshaft, a first motor, a hinge rod, and a push-pull shaft. The crankshaft is rotatably connected to the housing, the push-pull shaft is fixedly connected to the frame, one end of the hinge rod is rotatably connected to the push-pull shaft, and the other end of the hinge rod is rotatably connected to the crankshaft. The first motor is fixedly connected to the housing, and the drive shaft of the first motor is coaxially fixed with the crankshaft.

[0010] By adopting the above technical solution, the first motor drives the crankshaft to rotate, and the crankshaft pulls or pushes the push-pull shaft through the hinge rod. The push-pull shaft drives the frame to slide back and forth in the horizontal direction, realizing the reciprocating screening sliding of the shaking and balancing disc.

[0011] Preferably, the deflection mechanism includes a sliding block, a fixed track, a first roller, and a sliding assembly. The sliding block slides vertically within the housing, and the sliding assembly drives the sliding block to slide. The first roller is rotatably connected to the sliding block. The fixed track is fixedly installed at the bottom of the pallet along its length, and the first roller rolls within the fixed track.

[0012] By adopting the above technical solution, when it is necessary to drive the pallet to deflect downwards to pour out the material, the sliding component drives the sliding block to move vertically downwards, and the sliding block drives the first roller to move downwards synchronously. The rotational connection between the first roller and the sliding block allows the fixed track to deflect relative to the sliding block. The first roller pulls the fixed track to move downwards, thereby forcing the pallet to deflect downwards and tilt around the hinge point with the frame, thereby pouring out the material in the shaking tray.

[0013] Preferably, the sliding assembly includes a second motor, a cam, and a driven rod. The cam is rotatably connected to the housing, the second motor is fixedly connected to the housing, the drive shaft of the second motor is coaxially fixed with the cam, one end of the driven rod is fixedly connected to the sliding block, and the other end of the driven rod abuts against the peripheral wall of the cam.

[0014] By adopting the above technical solution, the second motor drives the cam to rotate. During the rotation of the cam, the change in the outer diameter of its own peripheral wall will generate a vertical thrust on the driven rod, thereby causing the driven rod and the sliding block to slide vertically.

[0015] Preferably, the sliding assembly further includes a fixed block and a tension spring. The fixed block is fixedly connected to the housing. The fixed block and the cam are both located above the sliding block. One end of the tension spring is fixedly connected to the fixed block, and the other end of the tension spring is fixedly connected to the sliding block. The tension spring drives the sliding block to move closer to the fixed block.

[0016] By adopting the above technical solution, the tension spring always applies tension to the sliding block, so that the top of the driven rod abuts against the peripheral wall of the cam, ensuring that the driven rod slides and moves with the rotation of the cam.

[0017] Preferably, a second roller is rotatably provided on the top of the driven rod, and the second roller rolls on the peripheral wall of the cam.

[0018] By adopting the above technical solution, the sliding friction between the follower rod and the cam is transformed into rolling friction, which reduces the mechanical wear between the follower rod and the cam, extends the service life of the components, reduces transmission resistance, makes the vertical movement of the sliding block smoother, and improves the operational stability of the deflection mechanism.

[0019] Preferably, the feeding mechanism includes a hopper, a rotating shaft, a rotating disk, and a third motor. The hopper is fixed and penetrates the top wall of the housing, and the bottom of the hopper extends above the shaking disk. The rotating shaft is rotatably connected to the top of the housing. The third motor is fixedly connected to the housing, and the drive shaft of the third motor is coaxially fixed with the rotating shaft. The rotating disk is coaxially fixed with the rotating shaft. The upper end face of the rotating disk abuts against the bottom of the hopper and seals the bottom of the hopper. A feeding hole is vertically penetrating the rotating disk, and the feeding hole can be directly opposite the bottom of the hopper.

[0020] By adopting the above technical solution, the hopper stores the material to be dried, and the third motor drives the rotating shaft to rotate the rotating disk. When the feeding hole on the rotating disk rotates to be directly opposite the bottom of the hopper, the material in the hopper falls into the shaking disk through the feeding hole to achieve quantitative feeding. This avoids excessive feeding at one time, which would cause the material to accumulate and ensure that the material in the shaking disk is in a state that can be fully dispersed.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a shaking disc, a screening mechanism, and a feeding mechanism, the drying fan introduces hot air into the chamber to provide a drying heat source. The feeding mechanism quantitatively delivers perovskite quantum dots into the shaking disc to prevent excessive material accumulation. The screening mechanism drives the shaking disc to slide horizontally back and forth, causing the material in the shaking disc to be continuously dispersed and turned over. In this way, the perovskite quantum dots are dried in an accumulated state as much as possible, improving the drying effect and efficiency of the material. 2. By setting up a pallet, frame, sliding block, fixed track, first roller, and sliding assembly, when it is necessary to drive the pallet to deflect downwards to pour out the material, the sliding assembly drives the sliding block to move vertically downwards, the sliding block drives the first roller to move downwards synchronously, and the rotational connection between the first roller and the sliding block allows the fixed track and the sliding block to deflect relative to each other. The first roller pulls the fixed track to move downwards, thereby forcing the pallet to deflect downwards and tilt around the hinge point with the frame, thereby pouring out the material in the shaker. 3. By setting up a crankshaft, a first motor, a hinge rod, and a push-pull shaft, the first motor drives the crankshaft to rotate, and the crankshaft pulls or pushes the push-pull shaft through the hinge rod. The push-pull shaft drives the surrounding frame to slide back and forth in the horizontal direction, thereby realizing the reciprocating screening sliding of the shaking and sizing disc; 4. By setting up a hopper, a rotating shaft, a rotating disk, and a third motor, the hopper stores the material to be dried, and the third motor drives the rotating shaft to rotate the rotating disk. When the feeding hole on the rotating disk rotates to be directly opposite the bottom of the hopper, the material in the hopper falls into the shaking disk through the feeding hole, realizing quantitative feeding. This avoids excessive feeding at one time, which would cause material to accumulate, and ensures that the material in the shaking disk is in a state that can be fully dispersed. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a drying device for perovskite quantum dot production provided in the embodiments of this application.

[0023] Figure 2 This is a schematic diagram reflecting the internal structure of the box in the embodiments of this application.

[0024] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0025] Explanation of reference numerals in the attached drawings: 1. Box body; 11. Drying fan; 12. Discharge port; 13. Support leg; 2. Shaking disc; 21. Pallet; 22. Frame; 221. Third roller; 3. Screening mechanism; 31. Crankshaft; 32. First motor; 33. Hinge rod; 34. Push-pull shaft; 4. Feeding mechanism; 41. Hopper; 42. Rotating shaft; 43. Rotating disc; 431. Feeding hole; 44. Third motor; 5. Deflection mechanism; 51. Sliding block; 52. Fixed track; 53. First roller; 54. Sliding assembly; 541. Second motor; 542. Cam; 543. Follower rod; 544. Tension spring; 545. Fixed block; 546. Second roller. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0027] This application discloses a drying apparatus for the production of perovskite quantum dots. (Refer to...) Figure 1It includes a box body 1, with four integrally formed downward-extending support legs 13 at the bottom corners of the box body 1 for supporting the box body 1. The bottom of the box body 1 is provided with a discharge port 12 for discharging the material inside the box body 1. Two drying fans 11 for drying materials are fixedly installed on the box body 1.

[0028] Reference Figure 1 and Figure 2 A horizontally sliding shaking disc 2 is installed inside the housing 1. A screening mechanism 3 is installed inside the housing 1 to drive the shaking disc 2 to slide back and forth. A feeding mechanism 4 is installed on the top of the housing 1 to feed perovskite quantum dots into the shaking disc 2. A drying fan 11 introduces hot air into the housing 1 to provide a drying heat source. The feeding mechanism 4 feeds perovskite quantum dots into the shaking disc 2 in a quantitative manner to prevent excessive material accumulation in the shaking disc 2. The screening mechanism 3 drives the shaking disc 2 to slide back and forth horizontally, so that the material in the shaking disc 2 is continuously dispersed and turned.

[0029] To facilitate the unloading of the dried material from the shaking tray 2, refer to... Figure 1 and Figure 2 The shaking tray 2 includes a tray 21 and a frame 22. The frame 22 is horizontally slidably connected to the housing 1. In this embodiment, guide rails are fixedly installed on the two inner side walls of the housing 1 in a horizontal direction. Two third rollers 221 are rotatably installed on each side wall of the frame 22, and the third rollers 221 roll in the corresponding guide rails to guide the horizontal sliding of the frame 22. One end of the tray 21 is rotatably connected to the bottom of the frame 22. The axis of rotation of the tray 21 is horizontal and perpendicular to the sliding direction of the frame 22. The upper surface of the tray 21 abuts against the bottom of the frame 22 and seals the bottom of the frame 22. In this embodiment, a buffer pad is provided at the bottom of the frame 22, and the tray 21 abuts against the buffer pad at the bottom of the frame 22. When the tray 21 abuts against the bottom of the frame 22, the length direction of the tray 21 is parallel to the sliding direction of the frame 22. The housing 1 is also equipped with a deflection mechanism 5, which is used to drive the tray 21 to rotate, so that the tray 21 deflects downward and opens. At this time, the dried material in the shaking tray 2 slides out along the downward tilting tray 21.

[0030] To facilitate the opening and closing of the tray 21, refer to... Figure 2 and Figure 3 The deflection mechanism 5 includes a sliding block 51, a fixed track 52, a first roller 53, and a sliding assembly 54. The sliding block 51 slides vertically within the housing 1. In this embodiment, a slide rail is vertically fixed on the inner wall of the housing 1, and the sliding block 51 slides in conjunction with the slide rail. The first roller 53 is rotatably connected to the sliding block 51, and the rotation axis of the first roller 53 is parallel to the rotation axis of the pallet 21. The fixed track 52 is fixedly disposed at the bottom of the pallet 21 along the length direction of the pallet 21, and the first roller 53 rolls within the fixed track 52.

[0031] Reference Figure 2 and Figure 3 The sliding assembly 54 is used to drive the sliding block 51 to slide. The sliding assembly 54 includes a second motor 541, a cam 542, a driven rod 543, a fixed block 545, and a tension spring 544. The cam 542 is located above the sliding block 51 and is rotatably connected to the housing 1. The rotation axis of the cam 542 is parallel to the rotation axis of the support plate 21. The second motor 541 is fixedly connected to the outer wall of the housing 1. The drive shaft of the second motor 541 passes through the housing 1 and is coaxially fixed with the cam 542. The bottom end of the driven rod 543 is fixedly connected to the sliding block 51, and the top end of the driven rod 543 abuts against the peripheral wall of the cam 542. Specifically, a second roller 546 is rotatably provided on the top of the driven rod 543. The rotation axis of the second roller 546 is parallel to the rotation axis of the support plate 21, and the second roller 546 rolls on the peripheral wall of the cam 542. The fixed block 545 is fixedly connected to the inner wall of the housing 1. The fixed block 545 is located above the sliding block 51. The top end of the tension spring 544 is fixedly connected to the fixed block 545, and the bottom end of the tension spring 544 is fixedly connected to the sliding block 51. The tension spring 544 drives the sliding block 51 to approach the fixed block 545.

[0032] Reference Figure 2 and Figure 3 When the dried material needs to be poured out, the second motor 541 drives the cam 542 to rotate. The large-diameter part of the cam 542 contacts the second roller 546, applying a downward thrust to the second roller 546, forcing the driven rod 543 to move downward. The driven rod 543 drives the sliding block 51 to slide downward. Subsequently, the first roller 53 on the sliding block 51 moves downward and rolls in the fixed track 52. The first roller 53 pulls the fixed track 52 downward, forcing the pallet 21 to tilt downward, thereby driving the pallet 21 to open. When the cam 542 rotates to the point where the small-diameter part contacts the second roller 546, under the tension of the tension spring 544, the sliding block 51 returns to its original position, the first roller 53 pushes the fixed track 52 upward, the pallet 21 returns to horizontal and abuts against the bottom of the frame 22, thereby driving the pallet 21 to close.

[0033] To drive the shaking disc 2 to slide horizontally back and forth, so that the material inside the shaking disc 2 is continuously dispersed and turned, refer to Figure 1 and Figure 2The screening mechanism 3 includes a crankshaft 31, a first motor 32, a hinge rod 33, and a push-pull shaft 34. The crankshaft 31 is rotatably connected to the housing 1, and the rotation axis of the crankshaft 31 is parallel to the rotation axis of the support plate 21. The push-pull shaft 34 is fixedly connected to the frame 22, and the central axis of the push-pull shaft 34 is parallel to the rotation axis of the crankshaft 31. One end of the hinge rod 33 is rotatably connected to the push-pull shaft 34, and the other end of the hinge rod 33 is rotatably connected to a portion of the crankshaft 31 that is off-axis from the rotation axis. The first motor 32 is fixedly connected to the outer wall of the housing 1, and the drive shaft of the first motor 32 passes through the side wall of the housing 1 and is coaxially fixed with the crankshaft 31.

[0034] Reference Figure 1 and Figure 2 The first motor 32 drives the crankshaft 31 to rotate. The crankshaft 31 pulls or pushes the push-pull shaft 34 through the hinge rod 33, causing the push-pull shaft 34 to reciprocate in the horizontal direction. The push-pull shaft 34 drives the frame 22 and the support plate 21 at its bottom to slide horizontally back and forth. In this way, the shaking disc 2 is driven to slide horizontally back and forth, so that the material in the shaking disc 2 is continuously dispersed and turned.

[0035] In order to quantitatively deliver perovskite quantum dots into the mixing disc 2 by the feeding mechanism 4 and prevent excessive material accumulation in the mixing disc 2, refer to Figure 1 and Figure 2 The feeding mechanism 4 includes a hopper 41, a rotating shaft 42, a rotating disk 43, and a third motor 44. The hopper 41 is fixed and penetrates the top wall of the housing 1, with its bottom extending into the housing 1 and above the shaking disk 2. The rotating shaft 42 is rotatably connected to the top of the housing 1, and its rotation axis is vertical. The third motor 44 is fixedly connected to the top of the housing 1, and its drive shaft penetrates the top wall of the housing 1 and is coaxially fixed with the rotating shaft 42. The rotating disk 43 is coaxially fixed with the bottom of the rotating shaft 42, and its upper end face abuts against the bottom of the hopper 41, sealing the bottom of the hopper 41. A feeding hole 431 is vertically penetrating the rotating disk 43, and the feeding hole 431 can be directly opposite the bottom of the hopper 41.

[0036] Reference Figure 1 and Figure 2 When material needs to be fed into the shaking disc 2, the third motor 44 starts, driving the rotating shaft 42 to rotate the rotating disc 43. When the feeding hole 431 on the rotating disc 43 rotates to be directly opposite the bottom of the hopper 41, the perovskite quantum dot material in the hopper 41 falls into the shaking disc 2 through the feeding hole 431. When there is no need to feed material into the shaking disc 2, the feeding hole 431 is offset from the bottom of the hopper 41, and the upper surface of the rotating disc 43 blocks the bottom of the hopper 41, stopping the feeding. This prevents excessive accumulation of material in the shaking disc 2, ensuring the material is fully dispersed during the drying process.

[0037] The implementation principle of a drying device for perovskite quantum dot production according to an embodiment of this application is as follows: the drying fan 11 introduces hot air into the housing 1 to provide a drying heat source. The third motor 44 starts intermittently, causing the feed hole 431 on the rotating disk 43 to rotate until it is directly opposite the bottom of the hopper 41. The perovskite quantum dot material in the hopper 41 falls into the shaking disk 2 through the feed hole 431, and the perovskite quantum dots are quantitatively fed into the shaking disk 2. Then the third motor 44 drives the rotating disk 43 to reset.

[0038] Then, the first motor 32 drives the crankshaft 31 to rotate. The crankshaft 31 pulls or pushes the push-pull shaft 34 through the hinge rod 33, causing the push-pull shaft 34 to drive the frame 22 and the bottom tray 21 to slide horizontally back and forth. In this way, the shaking disc 2 is driven to slide horizontally back and forth, causing the material in the shaking disc 2 to be continuously dispersed and turned. After a period of time, the material in the shaking disc 2 is fully dried. At this time, the second motor 541 drives the cam 542 to rotate. The large diameter part of the cam 542 contacts the second roller 546, applying a downward thrust to the second roller 546, forcing the driven rod 543 to move downward. The driven rod 543 drives the sliding block 51 to slide downward. Then, the first roller 53 on the sliding block 51 moves downward and rolls in the fixed track 52. The first roller 53 pulls the fixed track 52 downward, forcing the tray 21 to tilt downward, thereby driving the tray 21 to open. The dried material in the shaking disc 2 slides out along the downward tilting tray 21. Then, cam 542 rotates to the small diameter section and contacts the second roller 546. Under the tension of tension spring 544, sliding block 51 returns to its original position, first roller 53 pushes fixed track 52 upward, and pallet 21 returns to horizontal and abuts against the bottom of frame 22, thereby driving pallet 21 to close. Subsequently, third motor 44 starts again and repeats the above actions until all materials are fully dried. In this way, the drying of perovskite quantum dots in a piled-up state is avoided as much as possible, improving the drying effect and efficiency of the material.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drying apparatus for perovskite quantum dot production, comprising a housing (1), wherein a drying fan (11) is fixedly installed on the housing (1), characterized in that: A shaking disc (2) is horizontally slidably disposed inside the housing (1). A sieving mechanism (3) for driving the shaking disc (2) to reciprocate is disposed inside the housing (1). A feeding mechanism (4) is disposed on the top of the housing (1) for feeding perovskite quantum dots to the shaking disc (2). The shaking disc (2) includes a tray (21) and a frame (22). The frame (22) is horizontally slidably connected to the housing (1). The tray (21) is rotatably connected to the frame (22). A deflection mechanism (5) is disposed inside the housing (1) for driving the tray (21) to rotate. The pallet (21) abuts against the bottom of the frame (22) and seals the bottom of the frame (22); the screening mechanism (3) includes a crankshaft (31), a first motor (32), a hinge rod (33), and a push-pull shaft (34). The crankshaft (31) is rotatably connected to the housing (1), the push-pull shaft (34) is fixedly connected to the frame (22), one end of the hinge rod (33) is rotatably connected to the push-pull shaft (34), and the other end of the hinge rod (33) is rotatably connected to the crankshaft (31). The first motor (32) is fixedly connected to the housing (1), and the drive shaft of the first motor (32) is coaxially fixed with the crankshaft (31).

2. The drying apparatus for perovskite quantum dot production according to claim 1, characterized in that: The deflection mechanism (5) includes a sliding block (51), a fixed track (52), a first roller (53), and a sliding assembly (54). The sliding block (51) slides vertically within the housing (1). The sliding assembly (54) is used to drive the sliding block (51) to slide. The first roller (53) is rotatably connected to the sliding block (51). The fixed track (52) is fixedly installed at the bottom of the pallet (21) along the length direction of the pallet (21). The first roller (53) rolls within the fixed track (52).

3. The drying apparatus for perovskite quantum dot production according to claim 2, characterized in that: The sliding assembly (54) includes a second motor (541), a cam (542), and a driven rod (543). The cam (542) is rotatably connected to the housing (1), the second motor (541) is fixedly connected to the housing (1), the drive shaft of the second motor (541) is coaxially fixed with the cam (542), one end of the driven rod (543) is fixedly connected to the sliding block (51), and the other end of the driven rod (543) abuts against the peripheral wall of the cam (542).

4. The drying apparatus for perovskite quantum dot production according to claim 3, characterized in that: The sliding assembly (54) also includes a fixed block (545) and a tension spring (544). The fixed block (545) is fixedly connected to the housing (1). The fixed block (545) and the cam (542) are both located above the sliding block (51). One end of the tension spring (544) is fixedly connected to the fixed block (545), and the other end of the tension spring (544) is fixedly connected to the sliding block (51). The tension spring (544) drives the sliding block (51) to move closer to the fixed block (545).

5. A drying apparatus for perovskite quantum dot production according to claim 3, characterized in that: The driven rod (543) is rotatably provided with a second roller (546) at its top, and the second roller (546) rolls on the peripheral wall of the cam (542).

6. A drying apparatus for perovskite quantum dot production according to claim 1, characterized in that: The feeding mechanism (4) includes a hopper (41), a rotating shaft (42), a rotating disk (43), and a third motor (44). The hopper (41) is fixed and penetrates the top wall of the box (1). The bottom of the hopper (41) extends above the shaking disk (2). The rotating shaft (42) is rotatably connected to the top of the box (1). The third motor (44) is fixedly connected to the box (1). The drive shaft of the third motor (44) is coaxially fixed with the rotating shaft (42). The rotating disk (43) is coaxially fixed with the rotating shaft (42). The upper end face of the rotating disk (43) abuts against the bottom of the hopper (41) and seals the bottom of the hopper (41). A feeding hole (431) is vertically opened on the rotating disk (43). The feeding hole (431) can be directly opposite the bottom of the hopper (41).

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