Rectification equipment for preparing watermelon ketone

Abstract

The invention discloses rectification equipment for preparing watermelon ketone, and belongs to the technical field of watermelon ketone preparation, and the rectification equipment is technically characterized in that the rectification equipment comprises a bottom plate, filtration is achieved through an arranged pretreatment cleaning mechanism, meanwhile, reciprocating cleaning treatment on a filter plate is synchronously achieved, shutdown operation is not needed, and operation is convenient; the waste water treatment cost generated by a traditional chemical cleaning mode is avoided, cleaning, processing and use are facilitated, meanwhile, the subsequent rectification efficiency is remarkably improved, the covering cleaning area of liquid is remarkably increased through the arranged pretreatment spraying mechanism, meanwhile, dynamic cleaning treatment on the filter plate is achieved, and compared with traditional disassembly and washing filtration, the waste water treatment cost is reduced. The maintenance frequency is reduced, the equipment shutdown risk is reduced, later maintenance and use are facilitated, good rectification and condensation control treatment on watermelon ketone are achieved through the arranged rectification mechanism, rectification processing and use are facilitated, and the beneficial effects that the pretreatment effect is good, and rectification processing is facilitated are achieved.

Description

Technical Field

[0001] This invention relates to the field of watermelon ketone preparation, and more specifically to a distillation apparatus for preparing watermelon ketone. Background Technology

[0002] In modern industry, watermelon ketone, as an important component of fragrances and flavorings, is widely used in cosmetics, food, and other fields. With increasingly higher demands for product quality and sensory experience, the purity requirements for watermelon ketone are becoming more stringent. Therefore, research on its purification process is of paramount importance. Distillation, as one of the key methods for watermelon ketone purification, places extremely high demands on the performance and efficiency of the equipment.

[0003] Currently, the distillation equipment used for the preparation of watermelon ketone has formed a mature technical system. However, in the pretreatment stage of the raw material liquid before the start of the distillation process, especially the filtration and collection of impurities in the liquid, there is a lack of corresponding good pretreatment measures. As a result, the subsequent distillation efficiency of watermelon ketone is greatly reduced, its applicability is poor, and it cannot meet the actual use requirements.

[0004] Therefore, there is a need to provide a distillation apparatus for preparing watermelon ketones, which aims to solve the above problems. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a distillation apparatus for preparing watermelon ketone, which aims to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A distillation apparatus for preparing watermelon ketone includes a base plate with casters at its bottom for movement, a distillation column on the base plate, a pretreatment tank for pretreating liquid on one side of the distillation column, and an inlet pipe connected to the pretreatment tank. The apparatus also includes: A pretreatment cleaning mechanism is installed inside the base plate and is used to filter and clean the incoming liquid. The pretreatment cleaning mechanism includes a filter plate for internal filtration, a movable plate and a cleaning brush for cleaning. The cleaning brush is rotatably mounted on the movable plate via a fourth connecting shaft. An intermediate plate is provided above the middle of the filter plate. A limit plate is provided on the side of the movable plate near the intermediate plate. The movable plate reciprocates inside the pretreatment box. The pretreatment spraying mechanism is installed inside the base plate and is synchronously driven by the pretreatment cleaning mechanism. It is used to spray the incoming liquid in a range of motion. The pretreatment spraying mechanism includes a swing nozzle for range of motion spraying. The swing nozzle is connected to the liquid inlet pipe through a docking hose and is movably installed below the liquid inlet pipe. A distillation unit, mounted on a base plate, is used for distillation processing of liquids.

[0007] As a further embodiment of the present invention, the pretreatment cleaning mechanism further includes an impeller for driving the movable plate to reciprocate. The impeller is rotatably mounted inside the side connecting box via a second connecting shaft. The movable plate is threadedly connected to a first reciprocating screw and a second reciprocating screw. Both the first and second reciprocating screws are rotatably mounted inside the pretreatment box. The first reciprocating screw is rotatably connected to the second reciprocating screw via a second synchronous belt. A first worm gear is fixedly connected to the first reciprocating screw. A first worm is meshed with the first worm gear. The first worm is coaxially arranged with the second connecting shaft. Both the first worm and the first worm gear are located inside the intermediate plate. Several water guide pipes for drainage are provided at the bottom of the intermediate plate.

[0008] As a further embodiment of the present invention, the pretreatment cleaning mechanism further includes a first pump body for driving the impeller to rotate. The first pump body is connected to the interior of the pretreatment tank through a second water pipe, and the first pump body is connected to a third water pipe and a fourth water pipe through the first water pipe. Valves are provided on the third water pipe and the fourth water pipe, and the third water pipe and the fourth water pipe are both connected to the interior of the side connection box. The bottom of the side connection box is connected to a water guide pipe on the intermediate plate through a return pipe.

[0009] As a further embodiment of the present invention, the pretreatment cleaning mechanism further includes a contact block and a contact toothed plate for driving the cleaning brush to move and clean the clearance. The contact block is fixedly installed inside the pretreatment box, and the contact toothed plate is slidably connected to the moving plate. The contact toothed plate and the contact block are adapted to slidably engage and engage.

[0010] As a further embodiment of the present invention, the pretreatment cleaning mechanism further includes a rotating gear for driving the cleaning brush to flip and avoid a misalignment. The contact toothed plate is slidably connected to the interior of the movable plate. A spring is provided at the connection between the contact toothed plate and the interior of the movable plate. The rotating gear is meshed with the contact toothed plate. The rotating gear is rotatably mounted inside the movable plate via a fifth connecting shaft. A second worm is fixedly connected to one end of the fifth connecting shaft. The second worm is meshed with a second worm wheel. The second worm wheel is fixedly connected to a fourth connecting shaft.

[0011] As a further embodiment of the present invention, the pretreatment spraying mechanism further includes a cam for driving the oscillating nozzle to oscillate and spray, and a first connecting shaft. The cam is rotatably mounted on the inner side of the oscillating nozzle, and the cam is rotatably mounted inside the pretreatment box via the first connecting shaft. A reset tension spring is provided at the docking point of the oscillating nozzle. The first connecting shaft is rotatably connected to a third connecting shaft via a first synchronous belt. The third connecting shaft is coaxially mounted at one end of the second connecting shaft via a one-way bearing.

[0012] As a further embodiment of the present invention, the distillation mechanism includes a distillation column and a condensation column for distillation processing. The distillation column is connected to a first pump body via a fifth water pipe. A heating mechanism for heating is provided below the distillation column. An annular condenser is connected to the top of the distillation column via a vaporization pipe. One end of the annular condenser is provided with a liquid outlet pipe, and the annular condenser is installed inside the condensation column. A receiving bottle and a measuring cup are provided below the liquid outlet pipe. The condensation column is connected to a second pump body via a seventh water pipe. The second pump body is connected to a water storage tank via a sixth water pipe, and an eighth water pipe is connected to the top of the condensation column, with the eighth water pipe facing the water storage tank.

[0013] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art: This invention achieves simultaneous cleaning of the filter plates during filtration through a pretreatment cleaning mechanism, eliminating the need for machine shutdown and avoiding the wastewater treatment costs associated with traditional chemical cleaning methods. It also facilitates cleaning and processing while significantly improving subsequent distillation efficiency.

[0014] The pretreatment spraying mechanism significantly improves the coverage area of ​​the liquid and enables dynamic cleaning of the filter plates. Compared with traditional disassembly and washing filters, it reduces the number of maintenance operations, lowers the risk of equipment downtime, and facilitates later maintenance and use. Furthermore, the distillation mechanism enables good distillation and condensation control of watermelon ketones, making it convenient for distillation processing.

[0015] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of the invention.

[0017] Figure 2 This is a side view of an embodiment of the invention.

[0018] Figure 3 This is a schematic diagram of the pretreatment box in an embodiment of the invention.

[0019] Figure 4 This is a cross-sectional view of the pretreatment box in an embodiment of the invention.

[0020] Figure 5 This is a schematic diagram of the connection structure inside the side connection box in an embodiment of the invention.

[0021] Figure 6 for Figure 5 A magnified structural diagram of A in the diagram.

[0022] Figure 7 This is a schematic diagram of the connection structure inside the pretreatment box in an embodiment of the invention.

[0023] Figure 8 This is a schematic diagram of the connection structure inside the intermediate plate in an embodiment of the invention.

[0024] Figure 9 This is a schematic diagram of the connection structure inside the movable plate in an embodiment of the invention.

[0025] Figure 10 This is a schematic diagram of the connection structure of the distillation column in an embodiment of the invention.

[0026] Figure 11 This is a side view of the distillation column connection in an embodiment of the invention.

[0027] Reference numerals: 1. Base plate; 2. Moving wheel; 3. Pretreatment box; 4. Inlet pipe; 5. Connecting hose; 6. Swinging nozzle; 7. Return spring; 8. Cam; 9. First connecting shaft; 10. First synchronous belt; 11. Side connecting box; 12. Impeller; 13. Second connecting shaft; 14. One-way bearing; 15. Third connecting shaft; 16. Return pipe; 17. First pump body; 18. First water pipe; 19. Second water pipe; 20. Third water pipe; 21. Fourth water pipe; 22. Intermediate plate; 23. Water guide pipe; 24. First worm gear; 25. First worm wheel; 26. First reciprocating screw; 27. Second synchronous belt 28. Second reciprocating screw; 29. ​​Moving plate; 30. Cleaning brush; 31. Fourth connecting shaft; 32. Limiting plate; 33. Contact block; 34. Contact toothed plate; 35. Rotating gear; 36. Fifth connecting shaft; 37. Second worm gear; 38. Second worm wheel; 39. Fifth water pipe; 40. Distillation column; 41. Heating mechanism; 42. Vaporization pipe; 43. Condensation tower; 44. Annular condenser; 45. Liquid outlet pipe; 46. Liquid receiving bottle; 47. Measuring cup; 48. Second pump body; 49. Water storage tank; 50. Sixth water pipe; 51. Seventh water pipe; 52. Eighth water pipe; 53. Filter plate; 54. Spring. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0030] Example 1

[0031] See Figures 1-9A distillation apparatus for preparing watermelon ketone includes a base plate 1, with casters 2 at the bottom for movement, a distillation column 40 on the base plate 1, a pretreatment tank 3 for pretreating liquid on one side of the distillation column 40, and an inlet pipe 4 connected to the pretreatment tank 3. The apparatus also includes: The pretreatment cleaning mechanism is installed inside the base plate 1 and is used to filter and clean the incoming liquid. The pretreatment cleaning mechanism includes a filter plate 53 for internal filtration, a movable plate 29 for cleaning, and a cleaning brush 30. The cleaning brush 30 is rotatably mounted on the movable plate 29 via a fourth connecting shaft 31. An intermediate plate 22 is provided above the middle part of the filter plate 53. A limit plate 32 is provided on the side of the movable plate 29 near the intermediate plate 22. The movable plate 29 reciprocates inside the pretreatment box 3.

[0032] Furthermore, the pretreatment cleaning mechanism also includes an impeller 12 for driving the moving plate 29 to reciprocate. The impeller 12 is rotatably mounted inside the side connecting box 11 via the second connecting shaft 13. The moving plate 29 is threadedly connected to the first reciprocating screw 26 and the second reciprocating screw 28. Both the first reciprocating screw 26 and the second reciprocating screw 28 are rotatably mounted inside the pretreatment box 3. The first reciprocating screw 26 is rotatably connected to the second reciprocating screw 28 via the second synchronous belt 27. A first worm gear 25 is fixedly connected to the first reciprocating screw 26. A first worm 24 is meshed with the first worm gear 25. The first worm 24 is coaxially arranged with the second connecting shaft 13. Both the first worm 24 and the first worm gear 25 are located inside the intermediate plate 22. Several water guide pipes 23 for drainage are provided at the bottom of the intermediate plate 22.

[0033] Furthermore, the pretreatment cleaning mechanism also includes a first pump body 17 for driving the impeller 12 to rotate. The first pump body 17 is connected to the interior of the pretreatment tank 3 through a second water pipe 19, and the first pump body 17 is connected to a third water pipe 20 and a fourth water pipe 21 through a first water pipe 18. Valves are provided on the third water pipe 20 and the fourth water pipe 21, and the third water pipe 20 and the fourth water pipe 21 are both connected to the interior of the side connection box 11. The bottom of the side connection box 11 is connected to the water guide pipe 23 on the intermediate plate 22 through a return pipe 16.

[0034] Furthermore, the pretreatment cleaning mechanism also includes a contact block 33 and a contact toothed plate 34 for driving the cleaning brush 30 to move the cleaning position. The contact block 33 is fixedly installed inside the pretreatment box 3, and the contact toothed plate 34 is slidably connected to the moving plate 29. The contact toothed plate 34 and the contact block 33 are adapted to slide together.

[0035] Furthermore, the pretreatment cleaning mechanism also includes a rotating gear 35 for driving the cleaning brush 30 to flip and avoid a misalignment. The contact toothed plate 34 is slidably connected to the inside of the moving plate 29. A spring 54 is provided at the connection between the contact toothed plate 34 and the inside of the moving plate 29. The rotating gear 35 is meshed on the contact toothed plate 34. The rotating gear 35 is rotatably mounted inside the moving plate 29 through the fifth connecting shaft 36. One end of the fifth connecting shaft 36 is fixedly connected to a second worm 37. The second worm 37 is meshed on a second worm wheel 38. The second worm wheel 38 is fixedly connected to a fourth connecting shaft 31.

[0036] Preferably, before the distillation of watermelon ketone, the raw material for preparing watermelon ketone is placed into the pretreatment tank 3 through the liquid inlet pipe 4 and sprayed out from the swing nozzle 6. The filter plate 53 in the pretreatment tank 3 performs filtration. At the same time, in order to achieve multiple filtration of the raw material and better subsequent cleaning treatment, the first pump body 17 draws the liquid at the bottom of the pretreatment tank 3 through the second water pipe 19 and injects it into the third water pipe 20 and the fourth water pipe 21 through the first water pipe 18. The third water pipe 20 and the fourth water pipe 21 are symmetrically arranged with respect to the second connecting shaft 13, and the water injection can be controlled by the valves on the third water pipe 20 and the fourth water pipe 21.

[0037] During cleaning, the valve on the third water pipe 20 is opened and the valve on the fourth water pipe 21 is closed. Under the impact of the water flow, the impeller 12 drives the second connecting shaft 13 to rotate. The water flowing into the side connecting box 11 can be sprayed out from the return pipe 16 to the water guide pipe 23 on the intermediate plate 22, realizing multiple filtration of the liquid. At this time, due to the unidirectional action of the one-way bearing 14, the third connecting shaft 15 cannot rotate and is in a stationary state. The second connecting shaft 13 synchronously drives the first worm 24 to rotate. Under the meshing connection between the first worm 24 and the first worm wheel 25, the first reciprocating screw 26 is driven to rotate. Under the synchronous driving action of the second synchronous belt 27, the second reciprocating screw 28 is driven to rotate. Thus, the moving plate 29 drives the cleaning brush 30 to move back and forth inside the pretreatment box 3 for cleaning.

[0038] When the moving plate 29 moves the cleaning brush 30 closer to the contact block 33, the contact toothed plate 34 compresses the spring 54 inside the moving plate 29 due to the appropriate engagement between the contact toothed plate 34 and the contact block 33. Furthermore, the contact toothed plate 34 meshes with the rotating gear 35, causing the second worm 37 on the fifth connecting shaft 36 to rotate. This, in turn, meshes with the second worm wheel 38, causing the fourth connecting shaft 31 to rotate the cleaning brush 30 away from the intermediate plate 22. This not only prevents impurities from being carried into the area near the intermediate plate 22 but also facilitates the drainage of liquid from the water pipe 23 on the intermediate plate 22. This ensures that the impurities on the filter plate 53 are always kept near the side of the pretreatment box 3 by the cleaning brush 30, facilitating subsequent cleaning. The pretreatment box 3 has corresponding doors for maintenance and repair, which are not shown in the figure.

[0039] In the distillation process for preparing watermelon ketone, the filter plate 53 needs to effectively intercept impurities. If cleaning is not timely, the flow resistance of the filter plate 53 will increase, which will affect the purity of the subsequent separation of watermelon ketone. This invention achieves good cleaning treatment of the surface of the filter plate 53 by liquid extraction and impact injection, without the need for machine shutdown, avoiding the wastewater treatment costs generated by traditional chemical cleaning methods, facilitating cleaning and processing, and also significantly improving the subsequent distillation efficiency.

[0040] Example 2

[0041] like Figures 1-9 As shown, this embodiment, based on embodiment 1, also includes a pretreatment spraying mechanism, which is installed inside the base plate 1 and synchronously driven by the pretreatment cleaning mechanism. It is used to perform range-lift spraying treatment on the incoming liquid. The pretreatment spraying mechanism includes a swing nozzle 6 for range-lift treatment. The swing nozzle 6 is connected to the liquid inlet pipe 4 through a docking hose 5, and the swing nozzle 6 is movably installed below the liquid inlet pipe 4.

[0042] Furthermore, the pretreatment spraying mechanism also includes a cam 8 for driving the oscillating nozzle 6 to oscillate and spray, and a first connecting shaft 9. The cam 8 is rotatably mounted on the inner side of the oscillating nozzle 6, and the cam 8 is rotatably mounted inside the pretreatment box 3 through the first connecting shaft 9. A reset tension spring 7 is provided at the docking point of the oscillating nozzle 6. The first connecting shaft 9 is rotatably connected to a third connecting shaft 15 through a first synchronous belt 10. The third connecting shaft 15 is coaxially mounted at one end of the second connecting shaft 13 through a one-way bearing 14.

[0043] Preferably, in this embodiment, to further improve the efficiency of cleaning and spraying, the valve on the third water pipe 20 is closed and the valve on the fourth water pipe 21 is opened. At this time, the third connecting shaft 15 is driven to rotate under the unidirectional action of the one-way bearing 14. The third connecting shaft 15 drives the cam 8 on the first connecting shaft 9 to rotate under the synchronous drive of the first synchronous belt 10. Then, under the reset action of the reset spring 7, the swinging nozzle 6 is driven to swing back and forth inside the pretreatment box 3, so that the sprayed liquid is distributed on the surface of the filter plate 53, which further improves the filtration efficiency and also facilitates the corresponding cleaning treatment of the cleaning brush 30.

[0044] This invention utilizes the circulating water flow of liquid impact to drive the oscillating nozzle 6 to continuously oscillate and spray, thereby significantly improving the liquid coverage and cleaning area. At the same time, it achieves dynamic cleaning treatment of the filter plate 53. Compared with traditional disassembly and washing filters, it reduces the number of maintenance times, lowers the risk of equipment downtime, and facilitates later maintenance and use.

[0045] Example 3

[0046] like Figures 1 to 11 As shown, this embodiment, based on the above embodiment, also includes a distillation mechanism, which is installed on the base plate 1 and is used to perform distillation processing on the liquid.

[0047] Furthermore, the distillation mechanism includes a distillation column 40 and a condenser column 43 for distillation. The distillation column 40 is connected to a first pump body 17 via a fifth water pipe 39. A heating mechanism 41 for heating is provided below the distillation column 40. An annular condenser 44 is connected to the top of the distillation column 40 via a vaporization pipe 42. One end of the annular condenser 44 is provided with a liquid outlet pipe 45. The annular condenser 44 is installed inside the condenser column 43. A receiving bottle 46 and a measuring cup 47 are provided below the liquid outlet pipe 45. The condenser column 43 is connected to a second pump body 48 via a seventh water pipe 51. The second pump body 48 is connected to a water storage tank 49 via a sixth water pipe 50. An eighth water pipe 52 is connected to the top of the condenser column 43 and is positioned towards the water storage tank 49.

[0048] Preferably, in this embodiment, during the distillation of watermelon ketone, the first pump 17 pumps the filtered liquid through the fifth water pipe 39 to the interior of the distillation column 40. The heating mechanism 41 below the distillation column 40 provides heating, and the generated steam is injected through the vaporization pipe 42 into the annular condenser 44 in the condensation column 43 for annular condensation. The second pump 48 pumps the liquid from the water storage tank 49 through the sixth water pipe 50 and injects it into the interior of the condensation column 43 through the seventh water pipe 51. The water used in the cold zone rises layer by layer from bottom to top for cooling, and finally flows back to the water storage tank 49 through the eighth water pipe 52 for recycling, further improving the distillation of watermelon ketone.

[0049] It should be noted that the components in this application are all general standard parts or parts known to those skilled in the art, which effectively solve the technical problems raised in the background art.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A distillation apparatus for preparing watermelon ketone, comprising a bottom plate (1), wherein the bottom of the bottom plate (1) is provided with casters (2) for movement, characterized in that, A distillation column (40) for distillation is provided on the base plate (1), and a pretreatment tank (3) for pretreatment liquid is provided on one side of the distillation column (40). The pretreatment tank (3) is connected to an inlet pipe (4), and also includes: The pretreatment cleaning mechanism is installed inside the base plate (1) and is used to filter and clean the incoming liquid. The pretreatment cleaning mechanism includes a filter plate (53) for internal filtration, a movable plate (29) for cleaning, and a cleaning brush (30). The cleaning brush (30) is rotatably mounted on the movable plate (29) via a fourth connecting shaft (31). An intermediate plate (22) is provided above the middle part of the filter plate (53). A limiting plate (32) is provided on the side of the movable plate (29) near the intermediate plate (22). The movable plate (29) reciprocates inside the pretreatment box (3). The pretreatment spraying mechanism is installed inside the base plate (1) and is synchronously driven by the pretreatment cleaning mechanism. It is used to spray the incoming liquid in a range of lifting manner. The pretreatment spraying mechanism includes a swing nozzle (6) for range lifting treatment. The swing nozzle (6) is connected to the liquid inlet pipe (4) through a docking hose (5), and the swing nozzle (6) is movably installed below the liquid inlet pipe (4). The distillation mechanism is mounted on the base plate (1) and is used for distillation processing of liquids.

2. The distillation apparatus for preparing watermelon ketone according to claim 1, characterized in that, The pretreatment cleaning mechanism also includes an impeller (12) for driving the moving plate (29) to reciprocate. The impeller (12) is rotatably mounted inside the side connecting box (11) via a second connecting shaft (13). The moving plate (29) is threadedly connected to a first reciprocating screw (26) and a second reciprocating screw (28). Both the first reciprocating screw (26) and the second reciprocating screw (28) are rotatably mounted inside the pretreatment box (3), and the first reciprocating screw (26) is driven by the second reciprocating screw (28) via a second connecting shaft (13). Two synchronous belts (27) are rotatably connected to a second reciprocating screw (28). A first worm wheel (25) is fixedly connected to the first reciprocating screw (26). A first worm (24) is meshed with the first worm wheel (25). The first worm (24) is coaxially arranged with the second connecting shaft (13). The first worm (24) and the first worm wheel (25) are both located inside the intermediate plate (22). Several water guide pipes (23) for drainage are provided at the bottom of the intermediate plate (22).

3. The distillation apparatus for preparing watermelon ketone according to claim 2, characterized in that, The pretreatment cleaning mechanism also includes a first pump body (17) for driving the impeller (12) to rotate. The first pump body (17) is connected to the interior of the pretreatment tank (3) through a second water pipe (19). The first pump body (17) is connected to a third water pipe (20) and a fourth water pipe (21) through a first water pipe (18). Valves are provided on the third water pipe (20) and the fourth water pipe (21). The third water pipe (20) and the fourth water pipe (21) are connected to the interior of the side connection box (11). The bottom of the side connection box (11) is connected to the water guide pipe (23) on the intermediate plate (22) through a return pipe (16).

4. The distillation apparatus for preparing watermelon ketone according to claim 3, characterized in that, The pretreatment cleaning mechanism also includes a contact block (33) and a contact toothed plate (34) for driving the cleaning brush (30) to move and clean the clearance position. The contact block (33) is fixedly installed inside the pretreatment box (3), and the contact toothed plate (34) is slidably connected to the moving plate (29). The contact toothed plate (34) and the contact block (33) are adapted to slide together.

5. The distillation apparatus for preparing watermelon ketone according to claim 4, characterized in that, The pretreatment cleaning mechanism also includes a rotating gear (35) for driving the cleaning brush (30) to flip and avoid a position. The contact toothed plate (34) is slidably connected to the inside of the moving plate (29). A spring (54) is provided at the connection between the contact toothed plate (34) and the inside of the moving plate (29). The rotating gear (35) is meshed on the contact toothed plate (34). The rotating gear (35) is rotatably installed inside the moving plate (29) through a fifth connecting shaft (36). A second worm (37) is fixedly connected to one end of the fifth connecting shaft (36). The second worm (37) is meshed on a second worm wheel (38). The second worm wheel (38) is fixedly connected to a fourth connecting shaft (31).

6. The distillation apparatus for preparing watermelon ketone according to claim 3, characterized in that, The pretreatment spraying mechanism also includes a cam (8) for driving the oscillating nozzle (6) to oscillate and spray, and a first connecting shaft (9). The cam (8) is rotatably mounted on the inside of the oscillating nozzle (6), and the cam (8) is rotatably mounted inside the pretreatment box (3) through the first connecting shaft (9). A reset spring (7) is provided at the docking point of the oscillating nozzle (6). The first connecting shaft (9) is rotatably connected to a third connecting shaft (15) through a first synchronous belt (10). The third connecting shaft (15) is coaxially mounted at one end of the second connecting shaft (13) through a one-way bearing (14).

7. The distillation apparatus for preparing watermelon ketone according to claim 1, characterized in that, The distillation mechanism includes a distillation column (40) and a condenser column (43) for distillation. The distillation column (40) is connected to a first pump body (17) via a fifth water pipe (39). A heating mechanism (41) for heating is provided below the distillation column (40). An annular condenser (44) is connected to the top of the distillation column (40) via a vaporization pipe (42). One end of the annular condenser (44) is provided with a liquid outlet pipe (45), and the annular condenser (44) is installed inside the condenser column (43). A receiving bottle (46) and a measuring cup (47) are provided below the liquid outlet pipe (45). The condenser column (43) is connected to a second pump body (48) via a seventh water pipe (51). The second pump body (48) is connected to a water storage tank (49) via a sixth water pipe (50), and an eighth water pipe (52) is connected to the top of the condenser column (43). The eighth water pipe (52) is positioned towards the water storage tank (49).

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