Film-scraping type molecular distillation device for producing methyl 4-methoxyacetoacetate

Abstract

The utility model discloses a wiped film type molecular distillation device for producing methyl 4-methoxyacetoacetate, which relates to the technical field of distillation and comprises a fixing frame, lifting motors are fixedly connected to the interiors of the two sides of the fixing frame, and threaded shafts are fixedly connected to the output ends of the lifting motors. According to the utility model, the threaded shaft is driven by the two groups of lifting motors to rotate clockwise, so that the sliding block moves downwards along the threaded shaft, the base and the distillation cylinder are separated, and when the sliding block slides downwards to a certain position along with the threaded shaft, the lifting motors stop rotating, and a worker holds the handle and pushes the connecting plate and the sliding column; the sliding column is completely inserted into the fixing shaft, then the handle is held, the connecting plate is rotated, the connecting plate drives the fixing shaft to rotate, the fixing shaft drives the base to rotate through the fixing block, so that the base is inclined, then the connecting plate is pushed, the connecting plate is inserted into the sliding block, the connecting plate is fixed, and the base is fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation, in particular to a scraped film molecular distillation device for producing 4-methoxymethyl acetoacetate. Background Art

[0002] 4-Methoxyacetoacetate, also known as 4-fluoroaniline, has a molecular formula of C6H10O4. 4-Methoxyacetoacetate is a colorless to yellow liquid commonly used as an intermediate in pharmaceuticals and pesticides. In the preparation of 4-methoxyacetoacetate, distillation is commonly used, so a wiped-film molecular distillation apparatus is required for the preparation of 4-methoxyacetoacetate.

[0003] Published patent: A wiped-film molecular distillation apparatus for preparing 4-methoxyacetoacetic acid methyl ester (publication number: CN212700608U), comprising a distillation tank, a condenser, a distillation tank, a scraper, and a dispersion structure. The distillation tank is fixed inside the distillation tank, and the distillation tank is fixed to the outer wall of the bottom of the condenser. Support legs are fixed to the corners of the bottom end of the distillation tank. A rotating rod is hinged to the top of the distillation tank above the condenser, and a cross bar is fixed to the bottom end of the rotating rod. Scrapers are fixed to both ends of the cross bar, and the scrapers fit tightly against the inner wall of the distillation tank. A dispersion structure is provided on the outer wall of the rotating rod above the cross bar. A motor is fixed to the top of the distillation tank at the position of the rotating rod, and the output end of the motor is fixed to a rotating shaft via a coupling. This utility model not only improves the uniformity of the distribution of 4-methoxyacetoacetic acid methyl ester and the convenience of collecting and discharging the distillate, but also improves the uniformity of the heating of 4-methoxyacetoacetic acid methyl ester.

[0004] The above patent has the following defects: after the distillation is completed, when the distillation tank is cleaned, the residues remaining at the bottom of the distillation tank cannot be cleaned up, and some objects will remain at the bottom, affecting the overall cleanliness of the distillation tank, which is not conducive to subsequent distillation work. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a wiped film molecular distillation device for producing 4-methoxymethyl acetoacetate.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a scraped film molecular distillation device for producing methyl methoxyacetoacetate, comprising a fixed frame, wherein both sides of the fixed frame are fixedly connected to a lifting motor, the output end of the lifting motor is fixedly connected to a threaded shaft, and the threaded shaft is rotatably connected to the inside of the fixed frame, the surface of the threaded shaft is threadedly connected to a slider, and the slider is slidably connected to the inside of the fixed frame, the slider passes through one end of the fixed frame and is rotatably connected to the fixed shaft, the end of the fixed shaft away from the slider is fixedly connected to a fixed block, the opposite sides of the two groups of fixed blocks are fixedly connected to a base, the middle part of the fixed shaft is slidably connected to a sliding column, and the upper end of the sliding column is fixedly connected to a connecting plate, the connecting plate and one end of the sliding column are slidably connected to the inside of the slider, the connecting plate passes through the upper end of the slider and is fixedly connected to a handle, a slide groove is provided on the side of the slider close to the fixed block, the connecting plate is rotatably connected to the slide groove at one end of the slider, and the rotation angle is one hundred and twenty degrees.

[0007] As a further description of the above technical solution:

[0008] The upper end of the fixing frame is fixedly connected with a support seat, the middle part of the support seat is fixedly connected with a distillation cylinder, and the lower end of the distillation cylinder is slidably connected with a base.

[0009] As a further description of the above technical solution:

[0010] A sealing cover is provided at the upper end of the distillation cylinder, a mounting seat is fixedly connected to one side of the upper surface of the sealing cover, a stirring motor is fixedly connected to the middle of the mounting seat, a rotating shaft is fixedly connected to the output end of the stirring motor, and the rotating shaft passes through one end of the sealing cover and is rotatably connected to the inside of the distillation cylinder.

[0011] As a further description of the above technical solution:

[0012] Four groups of stirring arms are fixedly connected to the surface of the rotating shaft, and the stirring arms are rotatably connected to the inside of the distillation cylinder, and the stirring arms are in contact with the inner surface of the distillation cylinder.

[0013] As a further description of the above technical solution:

[0014] A truncated cone-shaped groove is provided at the lower ends of both sides of the sealing cover, and the end with a smaller diameter of the groove passes upward through the sealing cover. Steam pipes are fixedly connected to both sides of the upper surface of the sealing cover, and the lower end of the steam pipe is located above the end with a smaller diameter of the groove. A solenoid valve is provided at the end of the steam pipe away from the sealing cover.

[0015] As a further description of the above technical solution:

[0016] A material injection pipe is fixedly connected to the middle of the other side of the sealing cover. The middle of the material injection pipe passes through the sealing cover and is connected to the middle of the distillation cylinder. A solenoid valve is provided in the middle of the upper end of the material injection pipe.

[0017] As a further description of the above technical solution:

[0018] The upper surfaces of both ends of the support seat are fixedly connected with fixed columns, the middle of the fixed columns are fixedly connected with a cylinder, the output end of the cylinder is fixedly connected with a connecting rod, and the ends of the two groups of connecting rods away from the cylinder are fixedly connected to the upper surface of the sealing cover.

[0019] The utility model has the following beneficial effects:

[0020] In the utility model, first, two sets of lifting motors are used to drive the threaded shaft to rotate clockwise, so that the slider moves downward along the threaded shaft, so that the base and the distillation cylinder are separated. When the slider slides downward with the threaded shaft to a certain position, the lifting motor stops rotating, and the worker holds the handle and pushes the connecting plate and the sliding column to make the sliding column fully inserted into the fixed shaft. Then, the worker holds the handle and rotates the connecting plate. The connecting plate rotates with the fixed shaft, and the fixed shaft rotates with the base through the fixed block, thereby tilting the base. Then, the connecting plate is pushed and inserted into the slider to fix the connecting plate, thereby fixing the base to facilitate the worker to clean the base, so that the cleaning effect is better and the cleaning efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the utility model;

[0022] Figure 2 This is a cross-sectional three-dimensional structural diagram of the distillation cylinder of the present utility model;

[0023] Figure 3 This is a sectional perspective view of the fixing frame of the present utility model;

[0024] Figure 4 This is a cross-sectional three-dimensional structural diagram of the slider of the present invention.

[0025] Legend:

[0026] 1. Fixed frame; 2. Support base; 3. Distillation cylinder; 4. Sealing cover; 5. Fixed column; 6. Cylinder; 7. Connecting rod; 8. Steam pipe; 9. Injection pipe; 10. Mounting base; 11. Stirring motor; 12. Base; 13. Rotating shaft; 14. Stirring arm; 15. Lifting motor; 16. Threaded shaft; 17. Slider; 18. Fixed block; 19. Connecting plate; 20. Fixed shaft. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections, indirect connections through an intermediate medium, or internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Reference Figure 1-4 The utility model provides an embodiment: a scraped film molecular distillation device for producing 4-methoxy methyl acetoacetate, comprising a fixed frame 1, wherein both sides of the fixed frame 1 are fixedly connected to a lifting motor 15, the output end of the lifting motor 15 is fixedly connected to a threaded shaft 16, and the threaded shaft 16 is rotatably connected to the inside of the fixed frame 1, and a slider 17 is threadedly connected to the surface of the threaded shaft 16, and the slider 17 is slidably connected to the inside of the fixed frame 1, and one end of the slider 17 passing through the fixed frame 1 is rotatably connected to the fixed shaft 20, and the fixed shaft 2 0The ends away from the slider 17 are fixedly connected to the fixed blocks 18, and the opposite sides of the two groups of fixed blocks 18 are fixedly connected to the base 12. The middle part of the fixed shaft 20 is slidably connected to the sliding column, and the upper end of the sliding column is fixedly connected to the connecting plate 19. The connecting plate 19 and one end of the sliding column are slidably connected inside the slider 17. The connecting plate 19 passes through the upper end of the slider 17 and is fixedly connected to the handle. A sliding groove is provided on the side of the slider 17 close to the fixed block 18. The connecting plate 19 is rotatably connected to the sliding groove at one end of the slider 17, and the rotation angle is 120 degrees.

[0030] The upper end of the fixed frame 1 is fixedly connected to the support base 2, the middle part of the support base 2 is fixedly connected to the distillation cylinder 3, the lower end of the distillation cylinder 3 is slidably connected to the base 12, the upper end of the distillation cylinder 3 is provided with a sealing cover 4, one side of the upper surface of the sealing cover 4 is fixedly connected to the mounting base 10, the middle part of the mounting base 10 is fixedly connected to the stirring motor 11, the output end of the stirring motor 11 is fixedly connected to the rotating shaft 13, and the rotating shaft 13 passes through one end of the sealing cover 4 and is rotatably connected to the inside of the distillation cylinder 3, four groups of stirring arms 14 are fixedly connected to the surface of the rotating shaft 13, and the stirring arms 14 are rotatably connected to the inside of the distillation cylinder 3, and the stirring arms 14 are in contact with the inner surface of the distillation cylinder 3, and the lower ends of both sides of the sealing cover 4 are provided with truncated cone-shaped The groove is formed on the upper surface of the sealing cover 4, and the end with the smaller diameter of the groove passes through the sealing cover 4 upward. Steam pipes 8 are fixedly connected on both sides of the upper surface of the sealing cover 4, and the lower end of the steam pipe 8 is located above the end with the smaller diameter of the groove. A solenoid valve is provided at the end of the steam pipe 8 away from the sealing cover 4, and a filling pipe 9 is fixedly connected to the middle of the other side of the sealing cover 4. The middle part of the filling pipe 9 passes through the sealing cover 4 and is connected to the middle of the distillation cylinder 3. A solenoid valve is provided in the middle of the upper end of the filling pipe 9. Fixed columns 5 are fixedly connected to the upper surfaces of both ends of the support seat 2, and a cylinder 6 is fixedly connected to the middle of the fixed column 5. A connecting rod 7 is fixedly connected to the output end of the cylinder 6. The two sets of connecting rods 7 are fixedly connected to the upper surface of the sealing cover 4 at one end away from the cylinder 6.

[0031] Working principle: When in use, open the solenoid valve and inject raw materials into the distillation cylinder 3, then close the solenoid valve on the injection pipe 9, and use the stirring motor 11 to drive the rotating shaft 13 and the stirring arm 14 to rotate, stir the raw materials, improve the distillation efficiency, and scrape off the residual raw materials on the inner wall of the distillation cylinder 3. Cooperate with the distillation structure inside the distillation cylinder 3 to distill the raw materials, and the steam enters the steam pipe 8 from the groove. Open the solenoid valve on the steam pipe 8 to allow the steam to enter the condensing equipment. After the distillation is completed, the threaded shaft 16 is driven to rotate clockwise by two sets of lifting motors 15, so that the slider 17 moves downward along the threaded shaft 16, so that the base 12 and the distillation cylinder 3 are separated. When the slider 17 slides down to a certain position with the threaded shaft 16, the lifting motor 15 stops rotating, and the worker holds the handle and pushes the connecting plate 19 and the sliding column to make the sliding column fully inserted into the fixed shaft 20. Then hold the handle and rotate the connecting plate 19. The connecting plate 19 rotates with the fixed shaft 20, and the fixed shaft 20 passes through the fixed block 18 The base 12 is rotated with the base 12, thereby tilting the base 12, and then the connecting plate 19 is pushed and the connecting plate 19 is inserted into the slider 17 to fix the connecting plate 19, thereby fixing the base 12 to facilitate workers to clean the base 12, while exposing the interior of the distillation cylinder 3, and also facilitating the cleaning of the interior of the distillation cylinder 3 and the stirring arm 14. After the cleaning is completed, the connecting plate 19 and the sliding shaft are pushed by the handle so that the sliding shaft and the connecting plate 19 are inserted into the fixed shaft 20, and the fixed shaft 20 and the fixed block 18 are rotated by the handle to restore the base 12 to its original position, and the connecting plate 19 and the sliding column are pushed by the handle again so that the connecting plate 19 and the sliding column are inserted into the slider 17, thereby fixing the fixed shaft 20 and preventing the fixed shaft 20 from rotating with the base 12, and then the lifting motor 15 drives the threaded shaft 16 to rotate counterclockwise, so that the slider 17 moves upward along the threaded shaft 16, thereby moving the base 12 to the lower end of the distillation cylinder 3, so that the base 12 seals the lower end of the distillation cylinder 3, facilitating the next distillation.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wiped film molecular distillation apparatus for producing methyl 4-methoxyacetoacetate, comprising a fixed frame (1), characterized in that: The interior of both sides of the fixing frame (1) is fixedly connected with a lifting motor (15), the output end of the lifting motor (15) is fixedly connected with a threaded shaft (16), and the threaded shaft (16) is rotatably connected to the interior of the fixing frame (1), the surface of the threaded shaft (16) is threadedly connected with a slider (17), and the slider (17) is slidably connected to the interior of the fixing frame (1), and the interior of one end of the slider (17) passing through the fixing frame (1) is rotatably connected with a fixed shaft (20), and the end of the fixed shaft (20) away from the slider (17) is fixedly connected with a fixed block (18). ), the two groups of fixed blocks (18) are fixedly connected to the base (12) on opposite sides, the middle of the fixed shaft (20) is slidably connected to a sliding column, and the upper end of the sliding column is fixedly connected to a connecting plate (19), the connecting plate (19) and one end of the sliding column are slidably connected inside the slider (17), the connecting plate (19) passes through the upper end of the slider (17) and is fixedly connected to a handle, the slider (17) is provided with a sliding groove on one side close to the fixed block (18), the connecting plate (19) is rotatably connected in the sliding groove at one end of the slider (17), and the rotation angle is one hundred and twenty degrees.

2. The wiped-film molecular distillation apparatus for producing 4-methoxymethyl acetoacetate according to claim 1, wherein: The upper end of the fixed frame (1) is fixedly connected to a support base (2), the middle part of the support base (2) is fixedly connected to a distillation cylinder (3), and the lower end of the distillation cylinder (3) is slidably connected to a base (12).

3. The wiped-film molecular distillation apparatus for producing 4-methoxymethyl acetoacetate according to claim 2, wherein: A sealing cover (4) is provided at the upper end of the distillation cylinder (3), a mounting seat (10) is fixedly connected to one side of the upper surface of the sealing cover (4), a stirring motor (11) is fixedly connected to the middle of the mounting seat (10), and a rotating shaft (13) is fixedly connected to the output end of the stirring motor (11), and the rotating shaft (13) passes through one end of the sealing cover (4) and is rotatably connected to the inside of the distillation cylinder (3).

4. The wiped-film molecular distillation apparatus for producing 4-methoxymethyl acetoacetate according to claim 3, wherein: Four groups of stirring arms (14) are fixedly connected to the surface of the rotating shaft (13), and the stirring arms (14) are rotatably connected to the inside of the distillation cylinder (3), and the stirring arms (14) are in contact with the inner surface of the distillation cylinder (3).

5. The wiped-film molecular distillation apparatus for producing 4-methoxymethyl acetoacetate according to claim 4, wherein: Cone-shaped grooves are provided at the lower ends of both sides of the sealing cover (4), and the end with a smaller diameter of the groove passes through the sealing cover (4) upwards. Steam pipes (8) are fixedly connected to both sides of the upper surface of the sealing cover (4), and the lower end of the steam pipe (8) is located above the end with a smaller diameter of the groove. A solenoid valve is provided at the end of the steam pipe (8) away from the sealing cover (4).

6. The wiped-film molecular distillation apparatus for producing 4-methoxymethyl acetoacetate according to claim 5, wherein: A material injection pipe (9) is fixedly connected to the middle of the other side of the sealing cover (4), and the middle of the material injection pipe (9) passes through the sealing cover (4) and is connected to the middle of the distillation cylinder (3). A solenoid valve is provided at the middle of the upper end of the material injection pipe (9).

7. The wiped-film molecular distillation apparatus for producing 4-methoxymethyl acetoacetate according to claim 2, wherein: The upper surfaces of both ends of the support seat (2) are fixedly connected to fixed columns (5), the middle of the fixed columns (5) are fixedly connected to a cylinder (6), the output end of the cylinder (6) is fixedly connected to a connecting rod (7), and the ends of the two groups of connecting rods (7) away from the cylinder (6) are fixedly connected to the upper surface of the sealing cover (4).

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