Crystallization kettle fixing structure for memantine hydrochloride intermediate production

Abstract

The utility model relates to the technical field of crystallization kettle fixing structures, and discloses a crystallization kettle fixing structure for memantine hydrochloride intermediate production, which comprises a fixing frame, an electric push rod and a clamping mechanism, the fixing frame is mounted on the upper portion of a wall, the electric push rod is mounted on the fixing frame, and the clamping mechanism is fixedly connected to the telescopic end of the electric push rod. The clamping mechanism is used for clamping the crystallization kettle cover body and the crystallization kettle body. According to the utility model, the clamping mechanism is driven by the electric push rod to push downwards, so that the clamping mechanism is clamped with the crystallization kettle cover body and the crystallization kettle body, and meanwhile, the electric push rod applies downward thrust to the clamping mechanism, so that the crystallization kettle cover body and the crystallization kettle body are clamped without shaking, and meanwhile, the clamping mechanism is matched with the ground to lock and fix the crystallization kettle body. The device is used for stabilizing shaking caused by reaction of memantine hydrochloride in the crystallization kettle or shaking caused by stirring in the crystallization kettle.

Description

Technical Field

[0001] The utility model relates to the technical field of crystallization kettle fixing structures, in particular to a crystallization kettle fixing structure used for the production of memantine hydrochloride intermediates. Background Art

[0002] The preparation process of memantine hydrochloride (MEAA-4) includes adding methanol and MEAA-3 into a reactor, heating to dissolve, and then filtering the mixture into another reactor, distilling the methanol under reduced pressure and concentrating the reaction solution, adding preheated acetone, stirring, cooling and maintaining the temperature, centrifuging to obtain a wet product, placing the wet product on a drying tray, and drying it in a vacuum oven. Finally, the product is sampled and tested.

[0003] According to the "A Crystallization Kettle Fixed Structure" proposed in CN218106795U, the crystallization kettle fixed structure includes two bases, a U-shaped mounting frame arranged between the tops of the two bases, a linear slide, a rectangular limit frame arranged between the slides of the two linear slides and capable of being sleeved on the outside of the crystallization kettle, four telescopic push rods at the side ends, four support legs, walking wheels arranged at the bottom of the support legs, and extension plates arranged at the side ends of the support legs. The fixed structure is large in size, resulting in a large space occupation, and is sleeved outside the crystallization kettle, affecting the staff's operation of the crystallization kettle;

[0004] Although the bottom of the supporting legs of the fixed structure of the crystallization kettle are provided with walking wheels, in order to fix the crystallization kettle, it must be fixed to the ground with anchor bolts during use, which makes it inconvenient to move. The fixed structure of the crystallization kettle will take up more production space, affecting the staff's operations such as adding materials, observation, and maintenance, affecting the flow of personnel and materials, and reducing work efficiency.

[0005] Therefore, we propose a fixed structure of a crystallization kettle for the production of memantine hydrochloride intermediates to solve the problems in the above background. Utility Model Content

[0006] The purpose of the utility model is to provide a crystallization kettle fixing structure for the production of memantine hydrochloride intermediates, so as to solve the problem that the fixed structure of the crystallization kettle in the prior art is large in size, occupies a large space, and is mounted on the outside of the crystallization kettle when in use, which limits the operating space of the staff and affects the staff's operation of the crystallization kettle.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A crystallization kettle fixing structure for producing memantine hydrochloride intermediates includes a fixing frame, an electric push rod, and a clamping mechanism arranged above the crystallization kettle. The electric push rod is installed on the fixing frame, and the clamping mechanism is fixedly connected to the telescopic end of the electric push rod. The electric push rod drives the clamping mechanism to rise and fall below the fixing frame.

[0009] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0010] The crystallization kettle fixing structure of the present invention utilizes a clamping mechanism, comprising a lifting plate and retractable, adjustable clamping jaws. Compared to existing technologies, this structure is simpler, occupies less space, and does not interfere with operator operation. This structure uses an electric push rod to lower the clamping mechanism to clamp the crystallization kettle, eliminating the need for anchor bolts. The clamping mechanism cooperates with the ground to lock and secure the crystallization kettle, stabilizing any shaking caused by reaction and stirring. After crystallization is complete, the electric push rod retracts, and the clamping mechanism rises, making it easier to open the lid and remove the crystals. The clamping mechanism retracts to the bottom of the fixed frame, which is mounted above the wall, fully utilizing vertical space and avoiding excessive floor space occupation. The saved space allows operators to easily access the crystallization kettle for operations such as adding materials, observing, moving, and repairing it. The clamping mechanism operates as follows: the electric push rod lowers the lifting plate, and the clamping jaws extend and retract inward to generate a clamping force, compressing the lid and body of the crystallization kettle from above while also exerting a clamping force on the sides. The motor drives the first bevel gear, which in turn drives the second bevel gear and the internally threaded rod, causing the threaded sleeve to extend and retract. As the threaded sleeve retracts, it clamps against the vessel body via a contact plate, minimizing vibration and sway, maintaining stability. Three sets of telescopic elements are arranged in a circular array to adapt to the various shapes of the vessel surface, providing stable clamping, minimizing sway and deflection, and evenly distributing pressure, facilitating a smooth crystallization process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0012] Figure 2 This is a schematic diagram of the connection structure between the electric push rod and the clamping mechanism of the second embodiment of the present utility model;

[0013] Figure 3 This is a schematic diagram of the bottom structure of the clamping mechanism of Example 2 of the present utility model;

[0014] Figure 4 This is a schematic diagram of the top view of the lifting plate of the third embodiment of the present utility model;

[0015] Figure 5 This is a schematic diagram of the internal structure of the lifting plate of the third embodiment of the present utility model;

[0016] Figure 6 This is an enlarged schematic diagram of the local internal structure of the lifting plate in Example 3 of the present utility model.

[0017] Among them: 1. Fixed frame; 2. Electric push rod; 3. Clamping mechanism; 5. Crystallization kettle cover; 6. Crystallization kettle body; 7. Chuck; 8. Arc-shaped clamping plate; 9. Extension edge; 10. Electric telescopic rod; 11. Lifting plate; 12. Clamping claw; 13. Motor; 14. First bevel gear; 15. Second bevel gear; 16. Internally threaded rod; 17. Threaded sleeve rod; 18. Bearing seat; 19. Laminating plate; 20. Limit block. DETAILED DESCRIPTION

[0018] 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.

[0019] Example 1:

[0020] See also Figure 1 , this utility model provides a technical solution:

[0021] A crystallization kettle fixing structure for producing memantine hydrochloride intermediates includes a fixing frame 1, an electric push rod 2, and a clamping mechanism 3 arranged above the crystallization kettle. The fixing frame 1 is installed on the upper part of the wall and can be fixed by bolt connection or welding the fixing frame 1 to the wall.

[0022] The electric push rod 2 is installed on the fixed frame 1, and the clamping mechanism 3 is fixedly connected to the telescopic end of the electric push rod 2. The clamping mechanism 3 is used to clamp the crystallization kettle cover 5 and the crystallization kettle body 6. The electric push rod 2 drives the clamping mechanism 3 to push downward, so that the clamping mechanism 3 and the crystallization kettle cover 5 and the crystallization kettle body 6 are clamped. At the same time, the electric push rod 2 gives the clamping mechanism 3 a downward thrust, so that the crystallization kettle cover 5 and the crystallization kettle body 6 are clamped and do not shake. At the same time, the clamping mechanism 3 cooperates with the ground to lock and fix the crystallization kettle body 6, which is used to stabilize the shaking caused by the reaction of memantine hydrochloride inside the crystallization kettle or the shaking caused by stirring inside the crystallization kettle; in the case of hydrochloric acid After the crystallization of the memantine intermediate is completed, the electric push rod 2 is retracted to raise the clamping mechanism 3 upward, so that the crystallization kettle cover 5 can be opened to take out the memantine hydrochloride intermediate crystals inside the crystallization kettle. Since the clamping mechanism 3 is retracted to the bottom of the fixing frame 1 and the fixing frame 1 is arranged above the wall, the vertical space is fully utilized to avoid excessive occupation of the space on the ground. The saved space allows the operator to more conveniently approach the crystallization kettle to perform operations such as adding materials, observing, moving or repairing, thereby improving work efficiency, enabling the operator to perform other work more freely, improving work convenience and comfort, and facilitating the flow of personnel and materials.

[0023] Furthermore, the clamping mechanism 3 is a chuck 7, and the edge of the chuck 7 is provided with an extended edge, and the inside of the extended edge is adapted to the crystallization kettle cover 5. The chuck 7 is pushed down by the electric push rod 2, and the chuck 7 applies downward pressure to the crystallization kettle cover 5, clamping the crystallization kettle cover 5 and the upper end of the crystallization kettle body 6. At the same time, the lower end extends to the outside of the crystallization kettle body 6 to prevent the horizontal dislocation and sliding between the crystallization kettle cover 5 and the crystallization kettle body 6, and stably connects the crystallization kettle cover 5 and the crystallization kettle body 6 to prevent wear between the crystallization kettle body 6 and the crystallization kettle cover 5 when the crystallization kettle body 6 vibrates.

[0024] Example 2:

[0025] See also Figure 2 、 Figure 3 , and combined with Example 1, it is further obtained that there are two electric push rods 2, one of which is fixedly connected to the fixing frame 1.

[0026] The difference from Example 1 is that the clamping mechanism 3 is two arc-shaped clamping plates 8, and the outer edge of the arc-shaped clamping plate 8 is provided with an extended edge 9, and the length of the extended edge 9 is greater than the thickness of the crystallization kettle cover 5. When the arc-shaped clamping plate 8 drops to contact the upper end of the crystallization kettle cover 5, its extended edge 9 contacts the outer side wall of the crystallization kettle body 6. The arc-shaped clamping plates 8 on both sides are symmetrically clamped on the outside of the crystallization kettle cover 5 and the crystallization kettle body 6, so that the crystallization kettle cover 5 and the crystallization kettle body 6 remain stable. The crystallization kettle body 6 receives longitudinal pressure and horizontal clamping force at the same time, so that it remains stable and does not shake. The fixation of the crystallization kettle body 6 can provide a more stable working environment, reduce vibration and shaking, and is conducive to the smooth progress of the crystallization process of the memantine hydrochloride intermediate.

[0027] Furthermore, the upper surfaces of the arc-shaped clamping plate 8 are respectively fixedly connected to the electric push rod 2, and the other electric push rod 2 is slidably connected to the fixed frame 1. An electric telescopic rod 10 is arranged between the two electric push rods 2. The electric push rod 2 slidably connected to the fixed frame 1 is adjusted in position by the extension and retraction of the electric telescopic rod 10. The sliding electric push rod 2 drives the arc-shaped clamping plate 8 at its telescopic end to move horizontally, and adjusts the distance between the two arc-shaped clamping plates 8 to make it suitable for fixing crystallization kettles of different diameters.

[0028] Example 3:

[0029] See also Figure 4 、 Figure 5 、 Figure 6, and combined with Example 1, the difference from Example 2 is that the clamping mechanism 3 includes a lifting plate 11, and a retractable and adjustable clamping claw 12 is installed on the upper end of the lifting plate 11. Two electric push rods 2 are symmetrically arranged on both sides of the lifting plate 11, which push the lifting plate 11 in a balanced manner and increase the thrust. The lifting plate 11 is pushed down by the electric push rod 2, and the retractable and adjustable clamping claw 12 can be retracted and retracted inward and outward relative to the lifting plate 11 to generate a clamping force. Through the retractable adjustment, it is suitable for the surface of the crystallization kettle of different shapes to clamp it, and under the action of the electric push rod 2, downward pressure is generated, so that the crystallization kettle is subjected to clamping force in both the longitudinal and horizontal directions to keep it stable.

[0030] Furthermore, the clamping claw 12 includes a driving component and a telescopic component cooperating with the driving component. The telescopic component is slidably connected to the edge of the lifting plate 11 along the radial direction. The telescopic component is driven by the driving component to extend and retract, and has a clamping force when it contracts.

[0031] Preferably, the driving component includes a motor 13 and a first bevel gear 14, the motor 13 is fixedly connected to the lifting plate 11, the first bevel gear 14 is arranged on the inner side of the lifting plate 11, and the first bevel gear 14 and the lifting plate 11 are located on the same axis, that is, the first bevel gear 14 is located at the inner center of the lifting plate 11, and the first bevel gear 14 is driven to rotate by the motor 13.

[0032] Preferably, the telescopic member includes a second bevel gear 15, an internally threaded rod 16, and a threaded sleeve rod 17 that cooperates with the internally threaded rod 16. A bearing seat 18 is fixedly connected to the inner side of the lifting disk 11. The bearing seat 18 rotatably supports one end of the internally threaded rod 16 close to the first bevel gear 14. The second bevel gear 15 is fixedly connected to one end of the internally threaded rod 16 close to the center of the lifting disk 11. The second bevel gear 15 is located in the vertical direction of the first bevel gear 14 and meshes with the first bevel gear 14. The rotation of the first bevel gear 14 drives the second bevel gear 15 meshed with it, and the second bevel gear 15 drives the internally threaded rod 16 to rotate. Since the internally threaded rod 16 is threadedly connected to the threaded sleeve rod 17, and the threaded sleeve rod 17 is slidably connected to the edge of the lifting disk 11, when the internally threaded rod 16 rotates clockwise, the threaded sleeve rod 17 will be driven to slide outward and extend. When the internally threaded rod 16 rotates counterclockwise, the threaded sleeve rod 17 will be driven to slide inward and retract.

[0033] One end of the threaded sleeve 17 located inside the lifting plate 11 is fixedly connected to a limiting block 20, and the limiting block 20 prevents the threaded sleeve 17 from slipping off the lifting plate 11. The end of the threaded sleeve 17 located outside the lifting plate 11 is provided with a fitting plate 19. When the threaded sleeve 17 contracts, the fitting plate 19 fits with the crystallization kettle cover 5 and the crystallization kettle body 6. The fitting plates 19 of multiple threaded sleeves 17 are clamped with the sides of the crystallization kettle cover 5 and the crystallization kettle body 6 to limit them in the horizontal direction.

[0034] Preferably, there are three groups of telescopic parts, and they are distributed in a circular array around the lifting plate 11. The advantage of the circular array distribution of the three groups of telescopic parts is that the three telescopic parts can stably clamp the side of the crystallization kettle body 6, reduce the shaking and deviation of the crystallization kettle body 6, and can evenly disperse the pressure to avoid damage to a certain telescopic part due to excessive force. The circular array distribution of the three clamps 12 can expand the clamping range and is suitable for fixing crystallization kettle bodies 6 of different shapes and sizes.

[0035] The working principle of this utility model:

[0036] Example 1:

[0037] The electric push rod 2 pushes the chuck 7 down, and the chuck 7 applies downward pressure to the crystallization kettle cover 5, clamping the crystallization kettle cover 5 and the upper end of the crystallization kettle body 6. The lower end of the chuck 7 extends to the outside of the crystallization kettle body 6 to prevent the crystallization kettle cover 5 and the crystallization kettle body 6 from sliding in the horizontal direction.

[0038] Example 2:

[0039] The electric push rod 2 pushes the arc-shaped clamping plate 8 down to contact the crystallization kettle cover 5, and the electric telescopic rod 10 extends and retracts, driving the electric push rod 2 slidably connected to the fixed frame 1 to adjust its position, thereby adjusting the distance between the two arc-shaped clamping plates 8, so that the extended edge 9 of the arc-shaped clamping plate 8 contacts the outer wall of the crystallization kettle body 6, so that the crystallization kettle cover 5 and the crystallization kettle body 6 remain stable, making it suitable for crystallization kettles of different diameters.

[0040] Example 3:

[0041] The electric push rod 2 pushes the lifting plate 11 to descend, and the retractable and adjustable clamping claw 12 can be retracted and retracted inward and outward relative to the lifting plate 11 to generate a clamping force. The clamping claw 12 presses the crystallization kettle cover 5 and the crystallization kettle body 6 from the top, and at the same time generates a clamping force on its side. The specific method is that the motor 13 drives the first bevel gear 14 to rotate, the first bevel gear 14 drives the second bevel gear 15 to rotate, and the second bevel gear 15 drives the internal threaded rod 16 to rotate, so that the threaded sleeve 17 slides outward and extends or slides inward and retracts; when the threaded sleeve 17 retracts, it is fitted with the crystallization kettle cover 5 and the crystallization kettle body 6 through the bonding plate 19 to clamp the crystallization kettle body 6, reduce vibration and shaking, keep it stable, and is conducive to the smooth progress of the crystallization process of the memantine hydrochloride intermediate.

[0042] The three groups of telescopic members are distributed in a circular array, so that the three telescopic members stably clamp the side of the crystallization kettle body 6, reduce the shaking and deviation of the crystallization kettle body 6, and can evenly distribute the pressure.

[0043] Although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crystallization kettle fixed structure for the production of memantine hydrochloride intermediates, characterized by: The invention comprises a fixed frame (1), an electric push rod (2), and a clamping mechanism (3) arranged above the crystallization kettle, wherein the electric push rod (2) is installed on the fixed frame (1), the clamping mechanism (3) is fixedly connected to the telescopic end of the electric push rod (2), and the electric push rod (2) drives the clamping mechanism (3) to rise and fall below the fixed frame (1).

2. The crystallization kettle fixed structure for producing a memantine hydrochloride intermediate according to claim 1, wherein: The clamping mechanism (3) is a chuck (7), and an extension edge is provided on the edge of the chuck (7), and the interior of the extension edge is adapted to the crystallization kettle cover (5).

3. The crystallization kettle fixed structure for producing a memantine hydrochloride intermediate according to claim 1, wherein: There are two electric push rods (2).

4. The crystallization kettle fixed structure for producing a memantine hydrochloride intermediate according to claim 3, wherein: The clamping mechanism (3) comprises two arc-shaped clamping plates (8), the outer edges of the arc-shaped clamping plates (8) are provided with extended edges (9), the length of the extended edges (9) is greater than the thickness of the crystallization kettle cover (5), the upper surfaces of the arc-shaped clamping plates (8) are respectively fixedly connected to the electric push rods (2), one of the electric push rods (2) is fixedly connected to the fixed frame (1) and the other electric push rod (2) is slidably connected to the fixed frame (1), and an electric telescopic rod (10) is provided between the two electric push rods (2).

5. The crystallization kettle fixed structure for producing a memantine hydrochloride intermediate according to claim 3, wherein: The clamping mechanism (3) comprises a lifting plate (11), the upper end of which is provided with a retractable and adjustable clamping claw (12), and the two electric push rods (2) are symmetrically arranged on both sides of the lifting plate (11), and the two electric push rods (2) are both fixed on the fixing frame (1).

6. The crystallization kettle fixed structure for producing a memantine hydrochloride intermediate according to claim 5, characterized in that: The clamping claw (12) comprises a driving component and a telescopic component matched with the driving component, and the telescopic component is slidably connected to the edge of the lifting plate (11) along the radial direction thereof.

7. The crystallization kettle fixed structure for producing a memantine hydrochloride intermediate according to claim 6, wherein: The driving component comprises a motor (13) and a first bevel gear (14); the motor (13) is fixedly connected to the lifting plate (11); the first bevel gear (14) is arranged inside the lifting plate (11); and the first bevel gear (14) and the lifting plate (11) are located on the same axis.

8. The crystallization kettle fixed structure for producing a memantine hydrochloride intermediate according to claim 7, wherein: The telescopic member comprises a second bevel gear (15), an internally threaded rod (16), and a threaded sleeve rod (17) matched with the internally threaded rod (16); the second bevel gear (15) is fixedly connected to one end of the internally threaded rod (16) close to the center of the lifting plate (11); the second bevel gear (15) is located in a vertical direction of the first bevel gear (14) and meshes with the first bevel gear (14); one end of the threaded sleeve rod (17) located inside the lifting plate (11) is fixedly connected to a limiting block (20); and one end of the threaded sleeve rod (17) located outside the lifting plate (11) is provided with a fitting plate (19).

9. The crystallization kettle fixed structure for producing a memantine hydrochloride intermediate according to claim 8, characterized in that: There are three groups of telescopic parts, which are distributed in an array around the circumference of the lifting plate (11).

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