A device for preparing perovskite quantum dot materials

Abstract

The present invention discloses a preparation device for perovskite quantum dot materials, which relates to the technical field of perovskite quantum dot material preparation. The present invention includes a frame, inside which a mixing tank is rotatably installed. Two feeding pipes are arranged at the top of the mixing tank, and two discharging pipes are arranged at the bottom of the mixing tank. A lower stirring motor is fixedly installed at the bottom of the mixing tank, and an output end of the lower stirring motor is fixedly installed with a lower driving shaft. A conical stirring part is sleeved outside the lower driving shaft. Stirring blades are annularly arranged on the outer surface of the conical stirring part. An inner stirring part is rotatably installed inside the conical stirring part, and stirring spiral blades are arranged outside the inner stirring part. By using the stirring blades arranged on the outer surface of the conical stirring part, the contact efficiency between the liquid and solid particles can be improved. Through the combined use of the inner stirring part, the stirring process of the perovskite quantum dot material preparation is completed integrally, and the production efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of perovskite quantum dot material preparation, and particularly relates to a perovskite quantum dot material preparation device. Background Art

[0002] Perovskite quantum dots are a class of semiconductor nanomaterials with broad application prospects. They have shown great potential in the fields of optoelectronics, photocatalysis, solar cells, and display technology. The excellent properties of perovskite quantum dots mainly stem from their unique crystal structure and size effect, which can provide excellent light absorption, luminescence properties, and good electron transport performance. However, to achieve the efficient preparation of perovskite quantum dots and ensure the stability of their quality and performance, it is crucial to control the key factors during the preparation process, especially the stirring process.

[0003] The preparation of perovskite quantum dot materials usually involves the following key steps, including the selection of precursors, solution preparation, synthesis process, and post-treatment, etc. The following is a typical preparation process of perovskite quantum dot materials:

[0004] (1) Precursor preparation: The precursors of perovskite quantum dot materials usually consist of metal salts (such as halides of lead or tin) and organic halides. Commonly used metal precursors include lead halides, and organic halides such as methylammonium salts or ethylammonium salts.

[0005] (2) Solution preparation: Dissolve the precursors in a solvent. Commonly used solvents include dichloromethane, carbon tetrachloride, or dimethyl sulfoxide, etc. The specific steps are as follows: Add metal halides and organic halides into the solvent in proportion, stir and heat until completely dissolved. The heating temperature is 100°C to 120°C to form a precursor solution.

[0006] (3) Synthesis of perovskite quantum dots: The synthesis of perovskite quantum dots usually adopts the solution method, such as the solvothermal method or the room-temperature solution method. The following is a common synthesis process: Heat the prepared precursor solution to 120°C to 160°C. This step helps to promote the reactivity of the solution and can control the crystal growth rate. Then, quickly inject the solution containing organic halides (such as methylammonium halide solution) into the metal halide solution. As the halide source is injected, perovskite crystals begin to form rapidly, and the reaction time can be controlled to adjust the size of the quantum dots. Stir the solution to promote uniform mixing.

[0007] Therefore, in the preparation of perovskite quantum dot materials, solid-liquid stirring needs to be carried out first, and then liquid-liquid stirring. Usually, two stirring devices are required for separate stirring, and after stirring, liquid transfer is also needed. During the transfer process, the solution temperature will drop. In a Chinese patent (application number: CN202321927964.1), a device for preparing perovskite quantum dot materials is disclosed, including a mixing tank. The bottom surface of the mixing tank is fixedly connected with support columns, the top surface of the mixing tank is fixedly connected with a tank cover, the inner wall of the mixing tank is fixedly connected with a feed pipe, the inner wall of the feed pipe is fixedly connected with a solenoid valve, the liquid inlet end of the feed pipe is fixedly connected with a storage tank, the inner wall of the storage tank is fixedly connected with a liquid level sensor, a feeding mechanism is arranged on the top surface of the tank cover, a stirring assembly is arranged on the top surface of the tank cover, a scraping mechanism is arranged on the bottom surface of the tank cover, and a discharging assembly is arranged inside the mixing tank. This device is a single stirring device, only suitable for the mixing and stirring between liquids, and not suitable for the stirring in the preparation of precursor solutions. Summary of the Invention

[0008] The purpose of the present invention is to provide a device for preparing perovskite quantum dot materials to solve the above problems.

[0009] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0010] A device for preparing perovskite quantum dot materials, including a frame. A mixing tank is rotatably installed inside the frame, and the mixing tank can be flipped. Two groups of feeding pipes are arranged at the top of the mixing tank, and two groups of discharging pipes are arranged at the bottom of the mixing tank. A lower stirring motor is fixedly installed at the bottom of the mixing tank, the output end of the lower stirring motor is fixedly installed with a lower driving shaft, a lower transmission guide bar is arranged on the outer side of the lower driving shaft, a conical stirring part is sleeved on the outer side of the lower driving shaft, stirring vanes are annularly arranged on the outer surface of the conical stirring part, an inner stirring part is rotatably installed inside the conical stirring part, stirring spiral blades are arranged on the outer side of the inner stirring part, a first transmission groove is opened on the inner wall of the conical stirring part, the inner stirring part is sleeved on the lower driving shaft, and a second transmission groove is opened on the inner wall. The lower transmission guide bar is inserted into the second transmission groove and can be inserted into the first transmission groove;

[0011] A plurality of material passing holes are penetrated through the outer edge of the conical stirring part, and the plurality of material passing holes are annularly distributed. An adjusting sliding ring is arranged inside the mixing tank, and the adjusting sliding ring can move up and down. A plurality of sealing plugs are fixedly connected to the bottom of the adjusting sliding ring, and the sealing plugs are hermetically inserted into the material passing holes. A material passing window is opened in the middle of the sealing plug, and a supporting top ring is arranged on the outer side of the sealing plug. The outer diameter of the supporting top ring is larger than the inner diameter of the material passing hole, and the supporting top ring is located above the material passing window.

[0012] Furthermore, an upper stirring motor is fixedly installed at the top of the mixing tank. The output end of the upper stirring motor is fixedly installed with an upper driving shaft. A rotary joint is arranged at the bottom of the upper driving shaft. A rotary receiving groove is formed at the top of the lower driving shaft. The rotary joint is rotatably installed in the rotary receiving groove. Transmission guide bars are arranged on the outer side of the upper driving shaft. The transmission guide bars are located above the rotary joint. Limit protrusions are arranged above the transmission guide bars. The transmission guide bars can be inserted into the first transmission grooves.

[0013] Furthermore, inner rotating vanes are annularly arranged inside the conical stirring part.

[0014] Furthermore, the stirring spiral blades are designed in a conical shape.

[0015] Furthermore, an internal gear is rotatably installed at the top of the mixing tank. A threaded hole is formed through the inside of the internal gear. The adjusting sliding ring is sleeved on the outer side of the upper driving shaft. A rotating ring is rotatably installed at the top of the adjusting sliding ring. An adjusting lead screw is fixedly installed at the top of the rotating ring. The adjusting lead screw is threadedly connected in the threaded hole.

[0016] Furthermore, an adjusting motor is fixedly installed at the top of the mixing tank. The output end of the adjusting motor is fixedly installed with an adjusting wheel. A transmission toothed ring is rotatably installed at the top of the mixing tank. There are two groups of the internal gear and the adjusting lead screw. The two groups of internal gears are meshed inside the transmission toothed ring. The adjusting wheel is meshed outside the transmission toothed ring.

[0017] Furthermore, a rubber sealing ring is rotatably installed on the outer side of the conical stirring part.

[0018] Furthermore, a retaining ring is arranged on the inner wall of the mixing tank. When the lower transmission guide bars are completely inserted into the first transmission grooves, the conical stirring part presses on the top of the retaining ring.

[0019] Furthermore, a tipping motor is fixedly installed at the inner bottom of the frame. The output end of the tipping motor is fixedly installed with a driving pulley. A driven pulley is rotatably installed on the outer side of the frame. The driven pulley is fixedly connected with the mixing tank. The driving pulley is in transmission connection with the driven pulley through a transmission belt.

[0020] Furthermore, stoppers are arranged on both sides of the frame.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention utilizes the arrangement of the stirring vanes on the outer surface of the conical stirring part, which helps to improve the contact efficiency between the liquid and solid particles, thereby enhancing the mixing effect, reducing precipitation, maintaining the suspension state of the solid particles in the liquid, and enabling efficient stirring of the precursor solution. After the stirring is completed, the slip ring is adjusted to drive the plugging pin to descend, and the feeding window descends to the position of the feeding hole. At this time, the precursor solution directly enters the lower part of the conical stirring part. Then, the plugging pin seals the feeding hole. Next, the mixing tank is flipped. At this time, the conical stirring part becomes a funnel-shaped container. By further using the inner stirring part in cooperation, it is applicable to the stirring of perovskite quantum dot solution method. It can not only make the solution mix evenly, but also the precipitated perovskite crystals will deposit in the conical stirring part, facilitating the collection of perovskite crystals, and integrally completing the stirring process of perovskite quantum dot material preparation, with a compact structure and high production efficiency.

[0023] 2. Through the cooperation of the plugging pin and the feeding hole, the present invention can directly complete the solution transfer inside the mixing tank, without consuming heat during the process and with high energy utilization efficiency.

[0024] 3. After the mixing tank is flipped, the conical stirring part presses on the supporting top ring of the plugging pin. At this time, the slip ring can drive the conical stirring part to move up and down through the plugging pin. By further using the cooperation of the lower transmission guide bar and the first transmission groove, the conical stirring part can rotate synchronously with the inner stirring part, and the conical stirring part can rotate relative to the inner stirring part, which is applicable to the mixing of different amounts of solutions and has a wider application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is the schematic diagram of the internal structure of the stirring tank of the present invention;

[0027] Figure 3 is the sectional view schematic diagram of the stirring tank of the present invention;

[0028] Figure 4 is the exploded view of the stirring assembly of the present invention;

[0029] Figure 5 is the schematic diagram of the structure of the plugging pin of the present invention;

[0030] Figure 6 is the schematic diagram of the structure of the upper drive shaft of the present invention;

[0031] Figure 7 is the sectional view schematic diagram of the conical stirring part of the present invention.

[0032] Reference numerals: 1, frame; 11, tilting motor; 12, driving pulley; 13, driven pulley; 14, stopper; 2, mixing tank; 21, adjusting motor; 22, adjusting wheel; 23, transmission gear ring; 24, internal gear; 25, retaining ring; 26, feeding pipe; 27, discharging pipe; 3, upper drive shaft; 31, upper stirring motor; 32, rotary joint; 33, upper transmission guide bar; 34, limiting projection; 4, lower drive shaft; 41, lower stirring motor; 42, lower transmission guide bar; 5, conical stirring part; 51, stirring blade; 52, first transmission groove; 53, material passing hole; 54, rubber sealing ring; 6, internal stirring part; 61, second transmission groove; 7, adjusting slip ring; 71, plugging pin; 72, material passing window; 73, supporting top ring; 74, adjusting lead screw. Detailed implementation mode

[0033] For the purpose of making the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] Example 1, as Figures 1 - 7 shown, a perovskite quantum dot material preparation device includes a frame 1. A mixing tank 2 is rotatably installed inside the frame 1. The mixing tank 2 can be tilted. Two groups of feeding pipes 26 are arranged at the top of the mixing tank 2. Two groups of discharging pipes 27 are arranged at the bottom of the mixing tank 2. A lower stirring motor 41 is fixedly installed at the bottom of the mixing tank 2. The output end of the lower stirring motor 41 is fixedly installed with a lower drive shaft 4. A lower transmission guide bar 42 is arranged on the outer side of the lower drive shaft 4. A conical stirring part 5 is sleeved on the outer side of the lower drive shaft 4. Stirring blades 51 are annularly arranged on the outer surface of the conical stirring part 5. An internal stirring part 6 is rotatably installed inside the conical stirring part 5. Stirring spiral blades are arranged on the outer side of the internal stirring part 6. First transmission grooves 52 are formed in the inner wall of the conical stirring part 5. The internal stirring part 6 is sleeved on the lower drive shaft 4 and has second transmission grooves 61 formed in its inner wall. The lower transmission guide bar 42 is inserted into the second transmission grooves 61 and can be inserted into the first transmission grooves 52.

[0035] A plurality of material passing holes 53 are formed through the outer edge of the conical stirring part 5. The plurality of material passing holes 53 are annularly distributed. An adjusting slip ring 7 is arranged inside the mixing tank 2. The adjusting slip ring 7 can move up and down. A plurality of plugging pins 71 are fixedly connected to the bottom of the adjusting slip ring 7. The plugging pins 71 are hermetically inserted into the material passing holes 53. Material passing windows 72 are formed in the middle of the plugging pins 71. A supporting top ring 73 is arranged on the outer side of the plugging pins 71. The outer diameter of the supporting top ring 73 is greater than the inner diameter of the material passing holes 53. The supporting top ring 73 is located above the material passing windows 72.

[0036] Precursor solution stirring: First, add the solvent into the mixing tank 2 through the feeding pipe 26, and then add metal halide and organic halide into the solvent in proportion through another set of feeding pipes 26. In the present invention, the heating device is not limited, and a common heating device for the mixing tank can be used. Heat the mixing tank 2 to 100°C to 120°C, and at the same time start the lower stirring motor 41. The lower stirring motor 41 drives the lower drive shaft 4 to rotate. The lower drive shaft 4 drives the conical stirring part 5 to rotate through the lower transmission guide bar 42 and the first transmission groove 52. The conical stirring part 5 stirs the solution. At this time, the tip of the conical stirring part 5 faces upward, so that solid particles can be guided to the lower half of the conical stirring part 5. At the same time, the conical stirring part 5 will drive the particles in the lower part upward through the stirring vanes 51, so that the particles can be better suspended in the solution, and the mixing effect is good.

[0037] Precursor solution transfer: After stirring is completed, control the regulating slip ring 7 to descend. The regulating slip ring 7 drives the plug pin 71 to descend. The feeding window 72 on the plug pin 71 descends to the position of the feeding hole 53. At this time, the precursor solution enters below the conical stirring part 5 through the feeding hole 53. After the solution is discharged, control the regulating slip ring 7 to continue to descend. The regulating slip ring 7 drives the plug pin 71 to descend. The upper half of the plug pin 71 seals the feeding hole 53. At the same time, the supporting top ring 73 presses against the conical stirring part 5. Then control the mixing tank 2 to flip. At this time, the supporting top ring 73 supports the conical stirring part 5, and the solution enters the conical stirring part 5.

[0038] Synthesis stirring of perovskite quantum dots: At this time, the temperature of the mixing tank 2 is 100°C to 120°C. Just slightly increase the temperature to reach the synthesis stirring temperature, and the synthesis stirring can be carried out quickly. The proportioning liquid is added into the mixing tank 2 through the feeding pipe 27. At this time, control the lower stirring motor 41 to drive the lower drive shaft 4 to rotate. The lower drive shaft 4 drives the conical stirring part 5 to rotate through the lower transmission guide bar 42 and the first transmission groove 52. At the same time, the lower transmission guide bar 42 drives the inner stirring part 6 to rotate through the second transmission groove 61. The inner stirring part 6 stirs the solution through the stirring spiral blades and conveys the solution upward at the same time, causing the solution to surge, and the mixing effect is good. And the precipitated perovskite crystals will deposit in the conical stirring part 5, which is convenient for collecting perovskite crystals. The simultaneous rotation of the conical stirring part 5 and the inner stirring part 6 is a relatively gentle stirring method, which is suitable for the case of less solution volume. It is also possible to control the regulating slip ring 7 to descend. The regulating slip ring 7 drives the plug pin 71 to descend. Since the conical stirring part 5 presses on the supporting top ring 73, the conical stirring part 5 will descend accordingly. When the first transmission groove 52 disengages from the lower transmission guide bar 42, the conical stirring part 5 does not rotate following the lower drive shaft 4, and only the inner stirring part 6 rotates, and the stirring intensity will increase, which is suitable for the case of moderate solution volume.

[0039] During the stirring process of the precursor solution, the inner side of the conical stirring part 5 and the inner stirring part 6 can be flushed through one set of the feeding pipes 27, and the flushed sewage is discharged through the other set of the feeding pipes 27. At the same time, during the synthesis and stirring of the perovskite quantum dots, the outer surface of the conical stirring part 5 can be flushed through one set of the feeding pipes 26, and the flushed sewage is discharged through the other set of the feeding pipes 26, with high flushing efficiency.

[0040] Embodiment 2, on the basis of the above embodiment, further includes that an upper stirring motor 31 is fixedly installed at the top of the mixing tank 2. The output end of the upper stirring motor 31 is fixedly installed with an upper driving shaft 3. A rotary joint 32 is arranged at the bottom of the upper driving shaft 3. A rotary connection groove is opened at the top of the lower driving shaft 4. The rotary joint 32 is rotatably installed in the rotary connection groove. A driving guide bar 33 is arranged on the outer side of the upper driving shaft 3. The driving guide bar 33 is located above the rotary joint 32. A limiting protrusion 34 is arranged above the driving guide bar 33. The driving guide bar 33 can be inserted into the first driving groove 52.

[0041] Control the regulating slip ring 7 to descend. The regulating slip ring 7 drives the plugging pin 71 to descend. Since the conical stirring part 5 presses on the supporting top ring 73, the conical stirring part 5 descends accordingly. The first driving groove 52 first disengages from the lower driving guide bar 42, and then the driving guide bar 33 is inserted into the first driving groove 52. At this time, the upper stirring motor 31 drives the upper driving shaft 3 to rotate, and the upper driving shaft 3 drives the conical stirring part 5 to rotate, enabling the conical stirring part 5 to rotate synchronously and differentially or reversely relative to the inner stirring part 6, providing more stirring types and a wider application range. It should be noted that during the cooperation process of the first driving groove 52 with the lower driving guide bar 42 and the driving guide bar 33, controlling the slow rotation of the upper driving shaft 3 and the lower driving shaft 4 can achieve accurate cooperation.

[0042] Embodiment 3, on the basis of the above embodiment, further includes that inner rotating vanes are annularly arranged on the inner side of the conical stirring part 5. Through the arrangement of the inner rotating vanes, the stirring effect is further improved.

[0043] Embodiment 4, on the basis of the above embodiment, further includes that the stirring spiral blades are designed in a conical shape. Through this design, there is enough precipitation space inside the conical stirring part 5, and the inner stirring part 6 can generate sufficient stirring intensity.

[0044] Embodiment 5, on the basis of the above embodiment, further includes that an internal gear 24 is rotatably installed at the top of the mixing tank 2. A threaded hole is penetrated through the inside of the internal gear 24. The regulating slip ring 7 is sleeved on the outer side of the upper driving shaft 3. A rotating ring is rotatably installed at the top of the regulating slip ring 7. A regulating lead screw 74 is fixedly installed at the top of the rotating ring. The regulating lead screw 74 is threadedly connected in the threaded hole.

[0045] By controlling the rotation of the internal gear 24, the internal gear 24 drives the lifting of the adjusting lead screw 74, the adjusting lead screw 74 drives the lifting of the adjusting slip ring 7, and due to the setting of the rotating ring, the adjusting slip ring 7 and the plugging pin 71 can rotate together with the conical stirring part 5.

[0046] Embodiment Six, on the basis of the above embodiment, further includes that an adjusting motor 21 is fixedly installed at the top of the mixing tank 2, an adjusting wheel 22 is fixedly installed at the output end of the adjusting motor 21, a transmission gear ring 23 is rotatably installed at the top of the mixing tank 2, two groups of internal gears 24 and adjusting lead screws 74 are provided, and the two groups of internal gears 24 are engaged inside the transmission gear ring 23, and the adjusting wheel 22 is engaged outside the transmission gear ring 23.

[0047] By controlling the energization of the adjusting motor 21, the adjusting motor 21 drives the rotation of the adjusting wheel 22, the adjusting wheel 22 drives the rotation of the transmission gear ring 23, the transmission gear ring 23 drives the synchronous rotation of the two groups of internal gears 24, and the two groups of internal gears 24 drive the synchronous lifting of the two groups of adjusting lead screws 74. Through the setting of the two groups of adjusting lead screws 74, a more stable supporting force can be provided for the adjusting slip ring 7.

[0048] Embodiment Seven, on the basis of the above embodiment, further includes that a rubber sealing ring 54 is rotatably installed outside the conical stirring part 5 to improve the rotational sealing performance between the conical stirring part 5 and the inner wall of the mixing tank 2.

[0049] Furthermore, a retaining ring 25 is provided on the inner wall of the mixing tank 2. When the lower transmission guide bar 42 is completely inserted into the first transmission groove 52, the conical stirring part 5 presses on the top of the retaining ring 25. Through the setting of the retaining ring 25, while providing a supporting force for the conical stirring part 5, the sealing performance can also be further improved.

[0050] Embodiment Eight, on the basis of the above embodiment, further includes that a tilting motor 11 is fixedly installed at the inner bottom of the frame 1, a driving pulley 12 is fixedly installed at the output end of the tilting motor 11, a driven pulley 13 is rotatably installed outside the frame 1, the driven pulley 13 is fixedly connected to the mixing tank 2, and the driving pulley 12 is in transmission connection with the driven pulley 13 through a transmission belt.

[0051] Furthermore, stoppers 14 are provided on both sides of the frame 1.

[0052] Control the energization of the tilting motor 11, the tilting motor 11 drives the rotation of the driving pulley 12, the driving pulley 12 drives the rotation of the driven pulley 13, the driven pulley 13 drives the mixing tank 2 to tilt. After the mixing tank 2 tilts, the two stoppers 14 extend out to block both sides of the mixing tank 2 to prevent the mixing tank 2 from shaking and ensure stable stirring.

[0053] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A perovskite quantum dot material preparation device, comprising a frame (1), characterized in that: A mixing tank (2) is rotatably mounted inside the frame (1); the mixing tank (2) can be turned over; two groups of feeding pipes (26) are arranged on the top of the mixing tank (2); two groups of feeding pipes (27) are arranged on the bottom of the mixing tank (2); a lower stirring motor (41) is fixedly mounted on the bottom of the mixing tank (2); a lower driving shaft (4) is fixedly mounted on the output end of the lower stirring motor (41); a lower transmission guide bar (42) is arranged on the outer side of the lower driving shaft (4); a conical stirring portion (5) is sleeved on the outer side of the lower driving shaft (4); The outer surface of the conical stirring portion (5) is provided with a stirring vane (51) in an annular shape, an inner stirring portion (6) is rotatably mounted inside the conical stirring portion (5), and a stirring spiral vane is provided on the outer side of the inner stirring portion (6), a first transmission groove (52) is provided on the inner wall of the conical stirring portion (5), the inner stirring portion (6) is sleeved on the lower drive shaft (4), and a second transmission groove (61) is provided on the inner wall, and the lower transmission guide bar (42) is inserted into the second transmission groove (61) and can be inserted into the first transmission groove (52); The outer edge of the conical stirring portion (5) is penetrated by a plurality of groups of material passing holes (53), and the plurality of groups of material passing holes (53) are distributed in a ring shape. An adjusting slip ring (7) is arranged inside the mixing tank (2), and the adjusting slip ring (7) can be raised and lowered. The bottom of the adjusting slip ring (7) is fixedly connected to a plurality of groups of blocking pins (71), and the blocking pins (71) are sealed and inserted in the material passing holes (53). A material passing window (72) is arranged in the middle of the blocking pin (71), and a supporting top ring (73) is arranged on the outer side of the blocking pin (71). The outer diameter of the supporting top ring (73) is larger than the inner diameter of the material passing hole (53), and the supporting top ring (73) is located above the material passing window (72); After the mixing tank (2) is turned over, the conical stirring portion (5) becomes a funnel-shaped container, the solution enters the conical stirring portion (5), and the conical stirring portion (5) is pressed against the supporting top ring (73) of the blocking pin (71). At this time, the adjusting slip ring (7) can drive the conical stirring portion (5) to move up and down through the blocking pin (71), so that the first transmission groove (52) and the lower transmission guide bar (42) can be plugged in or out.

2. A perovskite quantum dot material preparation device according to claim 1, characterized in that: An upper stirring motor (31) is fixedly mounted on the top of the mixing tank (2); an upper driving shaft (3) is fixedly mounted on the output end of the upper stirring motor (31); a rotating joint (32) is arranged at the bottom of the upper driving shaft (3); a rotating groove is provided at the top of the lower driving shaft (4); the rotating joint (32) is rotatably mounted in the rotating groove; an upper transmission guide bar (33) is arranged on the outer side of the upper driving shaft (3); the upper transmission guide bar (33) is located above the rotating joint (32); a limiting protrusion (34) is arranged above the upper transmission guide bar (33); and the upper transmission guide bar (33) can be inserted into the first transmission groove (52).

3. A perovskite quantum dot material preparation device according to claim 2, characterized in that: An inner rotating blade is provided in an annular shape on the inner side of the conical stirring portion (5).

4. A perovskite quantum dot material preparation device according to claim 3, characterized in that: The stirring spiral blade is designed to be conical.

5. A perovskite quantum dot material preparation device according to claim 4, characterized in that: An internal gear (24) is rotatably mounted on the top of the mixing tank (2), a threaded hole is formed inside the internal gear (24), the adjusting slip ring (7) is sleeved on the outside of the upper drive shaft (3), a swivel is rotatably mounted on the top of the adjusting slip ring (7), an adjusting screw (74) is fixedly mounted on the top of the swivel, and the adjusting screw (74) is threadedly connected in the threaded hole.

6. A perovskite quantum dot material preparation device according to claim 5, characterized in that: An adjusting motor (21) is fixedly mounted on the top of the mixing tank (2), an adjusting wheel (22) is fixedly mounted on the output end of the adjusting motor (21), a transmission gear ring (23) is rotatably mounted on the top of the mixing tank (2), two groups of internal gears (24) and adjusting lead screws (74) are provided, the two groups of internal gears (24) are meshed on the inner side of the transmission gear ring (23), and the adjusting wheel (22) is meshed on the outer side of the transmission gear ring (23).

7. The device for preparing perovskite quantum dot materials according to claim 1, characterized in that: A rubber sealing ring (54) is rotatably mounted on the outer side of the conical stirring portion (5).

8. The device for preparing perovskite quantum dot material according to claim 1, characterized in that: The inner wall of the mixing tank (2) is provided with a retaining ring (25), and when the lower transmission guide bar (42) is completely inserted into the first transmission groove (52), the conical stirring portion (5) is pressed against the top of the retaining ring (25).

9. A perovskite quantum dot material preparation device according to any one of claims 1 to 8, characterized in that: A turning motor (11) is fixedly mounted on the inner bottom of the frame (1), a driving pulley (12) is fixedly mounted on the output end of the turning motor (11), a driven pulley (13) is rotatably mounted on the outer side of the frame (1), the driven pulley (13) is fixedly connected to the mixing tank (2), and the driving pulley (12) is transmission-connected to the driven pulley (13) via a transmission belt.

10. The device for preparing perovskite quantum dot material according to claim 9, characterized in that: Stoppers (14) are provided on both sides of the frame (1).

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