A vibrating screen for feeding materials in nicotinamide production

Abstract

This utility model discloses a vibrating screen for nicotinamide production, comprising a support frame, four fixed seats (first type) fixed to the support frame, springs fixed to the fixed seats (first type), and fixed seats (second type) fixed to the springs. A vibrating screen body is fixed between the four fixed seats (second type). A dual-shaft motor is fixed to the lower side of the vibrating screen body. Eccentric wheels are fixed to the output shafts of the dual-shaft motors. Fixed columns are fixed to the output shafts of the dual-shaft motors. Connecting shells are fixed to the fixed columns. Sealing covers are fixed to the connecting shells. Connecting pipes are embedded within the fixed columns and communicate with the connecting shells. Through its control structure, this utility model allows the device to dynamically adjust the amplitude of the vibrating screen body according to screening requirements. When a water pump is started to inject water into the connecting shells, the centrifugal force of the connecting shells increases, causing the dual-shaft motors to drive the vibrating screen to produce a larger amplitude, suitable for processing materials that are difficult to screen. Conversely, pumping water reduces the amplitude, suitable for fine screening.

Description

Technical Field

[0001] This utility model relates to the field of nicotinamide production technology, and more specifically, it relates to a feeding vibrating screen for nicotinamide production. Background Technology

[0002] Nicotinamide, chemically known as nicotinamide, is an amide compound of nicotinic acid. It is odorless or nearly odorless, has a bitter taste, and is slightly hygroscopic. It is readily soluble in water and ethanol, and soluble in glycerol. This substance belongs to the water-soluble B vitamin group and can be formed in vivo from nicotinic acid. Its main clinical indications are the prevention and treatment of pellagra, stomatitis, glossitis, sick sinus syndrome, and atrioventricular block. During processing, the nicotinamide raw material needs to be screened to remove impurities.

[0003] Nicotinamide production requires the use of a vibrating screen for feeding, but existing vibrating screens have the following problems during use: 1. Existing vibrating screens can only change the vibration frequency by adjusting the motor speed, and cannot dynamically adjust the vibration amplitude during equipment operation. This means that when facing different material characteristics, the amplitude parameters cannot be optimized in real time to adapt to the best screening state, which greatly limits the process adaptability and operational flexibility of the equipment.

[0004] 2. The vibrating screen maintains the same vibration frequency and amplitude across the entire screen surface. When the material moves near the discharge port area, an excessively large constant amplitude will cause the material to be thrown up excessively, significantly reducing its effective contact time with the screen mesh and its chance of passing through the screen. This "over-throwing" phenomenon in the end area directly weakens the final screening effect and accuracy of the material.

[0005] 3. If the working trajectory of the vibrating screen is constrained by limiting its movement range, the continuous vibration energy generated by the screen body will be mainly transmitted and impacted on these limiting components. Long-term exposure to high-frequency impact loads can easily lead to a decrease in the positioning accuracy of the limiting components.

[0006] Therefore, in order to address the above problems, there is an urgent need for a vibrating screen for feeding nicotinamide production. Utility Model Content

[0007] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a feeding vibrating screen for nicotinamide production to solve the technical problems mentioned in the background art.

[0008] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a vibrating screen for nicotinamide production, comprising a support frame, four fixed seats 1 fixedly connected to the support frame, springs fixedly connected to the fixed seats 1, fixed seats 2 fixedly connected to the springs, a vibrating screen body fixedly connected between the four fixed seats 2, a dual-axis motor fixedly connected to the lower side of the vibrating screen body, eccentric wheels fixedly connected to the output shafts of the dual-axis motors, fixed columns fixedly connected to the output shafts of the dual-axis motors, connecting shells fixedly connected to the fixed columns, sealing caps fixedly connected to the connecting shells, connecting pipes embedded in the fixed columns, and the connecting pipes communicating with the connecting shells; the support frame is provided with a control structure and a limiting structure.

[0009] The present invention is further configured such that the connecting shell and the eccentric wheel are oriented in the same direction.

[0010] The present invention is further configured such that the connecting pipe is rotatably connected to a rotating sleeve, and the connecting pipe is configured as L-shaped.

[0011] The present invention is further configured such that the control structure includes a water tank, the water tank is fixedly connected to the lower side of the bracket, the water tank is fixedly connected to a water pump, the water pump is fixedly connected to and connected to two connecting hoses, and the connecting hoses are fixedly connected to the rotating sleeve of the adjacent connecting pipe.

[0012] The present invention is further configured such that the limiting structure includes two fixing blocks, the two fixing blocks are fixedly connected to the left side of the bracket, an electric push rod is fixedly connected to the fixing blocks, a rubber block is fixedly connected to the telescopic end of the electric push rod, a connecting plate is fixedly connected to the rubber block, and a column is fixedly connected to the connecting plate.

[0013] The present invention is further configured such that a hemispherical buffer pad is fixedly connected to the upper side of the column.

[0014] The present invention is further configured such that the bracket is fixedly connected to a fixed frame, the fixed frame is fixedly connected to two guide rails, each guide rail is slidably connected to two sliders, a rectangular shell is fixedly connected between adjacent sliders, a horizontal plate with equal spacing is fixedly connected inside the rectangular shell, and the fixed frame is fixedly connected to two electric push rods, the telescopic end of the electric push rods being fixedly connected to the adjacent rectangular shell.

[0015] (III) Beneficial Effects Compared with the prior art, this utility model provides a feeding vibrating screen for nicotinamide production, which has the following beneficial effects: This invention, through its control structure, allows the device to dynamically adjust the amplitude of the vibrating screen body according to screening requirements. When the water pump is started to inject water into the connecting shell, the centrifugal force of the connecting shell increases, and the dual-shaft motor drives the vibrating screen to generate a larger amplitude, suitable for processing materials that are difficult to screen; conversely, pumping water reduces the amplitude, suitable for fine screening. This improves the versatility and adaptability of the device, ensuring that nicotinamide raw materials can be efficiently screened under different particle sizes or humidity conditions, reducing material waste.

[0016] This invention, through the design of an electric push rod, column, and buffer pad in the limiting structure, can actively reduce the vibration amplitude at the discharge port of the vibrating screen. When the column rises, its buffer pad provides obstruction as the vibrating screen moves downward, reducing the material's throwing height and rolling speed. This allows the nicotinamide raw material to flow more smoothly at the discharge port, avoiding excessive tumbling or splashing, thereby improving screening uniformity and product yield, and is especially suitable for fragile or lightweight materials.

[0017] This utility model, through its limiting structure, also includes a rectangular shell, a horizontal plate, a guide rail, and an electric push rod, providing multi-level support for the column. When the connecting plate is inserted into the rectangular shell, the horizontal plate shares the vibration impact force, preventing the impact from acting entirely on the extension end of the electric push rod. This reduces wear and fatigue of key components, improves overall operational stability, and extends equipment life. Simultaneously, the buffering effect of the rubber block further absorbs vibration, ensuring the device remains reliable during long-term high-frequency operation, reducing the failure rate and maintenance requirements. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front structure of a vibrating screen for nicotinamide production according to the present invention. Figure 2 This is a bottom view of the structure of a vibrating screen for nicotinamide production according to the present invention. Figure 3 This is a schematic diagram of the dual-shaft motor and connecting shell in this utility model; Figure 4 This is a schematic diagram of the connecting shell and sealing cap in this utility model; Figure 5 This is a schematic diagram of the structure of the water tank and water pump in this utility model; Figure 6 This is a schematic diagram of the structure of the fixed frame and the electric push rod II in this utility model; Figure 7 This is a schematic diagram of the guide rail and rectangular shell in this utility model.

[0019] In the diagram: 1. Support frame; 2. Fixed seat one; 3. Spring; 4. Fixed seat two; 5. Vibrating screen body; 6. Dual-shaft motor; 7. Eccentric wheel; 8. Fixed column; 9. Connecting shell; 10. Sealing cover; 11. Connecting pipe; 12. Water tank; 13. Water pump; 14. Connecting hose; 15. Fixed block; 16. Electric push rod one; 17. Rubber block; 18. Connecting plate; 19. Column; 20. Buffer pad; 21. Fixed frame; 22. Guide rail; 23. Slider; 24. Rectangular shell; 25. Horizontal plate; 26. Electric push rod two. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0022] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0023] Please see Figures 1-7 A vibrating screen for nicotinamide production includes a support 1, four fixed seats 2 fixed to the support 1, springs 3 fixed to the fixed seats 2, fixed seats 4 fixed to the springs 3, a vibrating screen body 5 fixed between the four fixed seats 4, a dual-shaft motor 6 fixed to the lower side of the vibrating screen body 5, eccentric wheels 7 fixed to the output shafts of the dual-shaft motor 6, fixed columns 8 fixed to the output shafts of the dual-shaft motor 6, connecting shells 9 fixed to the fixed columns 8, sealing caps 10 fixed to the connecting shells 9, a connecting pipe 11 embedded in the fixed columns 8, the connecting pipe 11 communicating with the connecting shells 9, the support 1 having a control structure and a limiting structure; the connecting shells 9 and eccentric wheels 7 having the same orientation; a rotating sleeve rotatably connected to the connecting pipe 11, the connecting pipe 11 being L-shaped.

[0024] Please see Figure 1 and Figure 5 The control structure includes a water tank 12, which is fixed to the lower side of the bracket 1. A water pump 13 is fixed to the water tank 12. The water pump 13 is fixed to and connected to two connecting hoses 14. The connecting hoses 14 are fixed to the rotating sleeve of the adjacent connecting pipe 11.

[0025] In this embodiment, after the dual-axis motor 6 is started, the output end of the dual-axis motor 6 drives the eccentric wheel 7 and the connecting shell 9 to rotate synchronously. The high-frequency vibration generated by the high-speed rotation of the eccentric wheel 7 and the connecting shell 9 is transmitted to the vibrating screen body 5. Then the vibrating screen body 5 generates high-frequency vibration, and at the same time, the four springs 3 are also compressed back and forth with the vibration of the vibrating screen body 5, placing the nicotinamide raw material on the vibrating screen body 5, so that the vibrating screen screens the nicotinamide raw material for screening and feeding. When the nicotinamide raw material needs to increase the amplitude of the vibrating screen body 5 during screening and feeding, the water pump 13 is started. The water pump 13 draws water from the water tank 12 and injects it into the connecting shell 9 through the connecting hose 14 and the connecting pipe 11. When the water enters the connecting shell 9, it increases the centrifugal force when the connecting shell 9 rotates, and then the dual-axis motor 6 drives the vibrating screen body 5 to generate a larger amplitude, so as to meet the requirements of screening and feeding the nicotinamide raw material. Conversely, when the water is drawn out of the connecting shell 9 by the water pump 13, the vibration amplitude of the vibrating screen body 5 is reduced.

[0026] Please see Figure 1 , Figure 6 and Figure 7 The limiting structure includes two fixing blocks 15, which are fixed to the left side of the bracket 1. An electric push rod 16 is fixed to the fixing block 15. A rubber block 17 is fixed to the telescopic end of the electric push rod 16. A connecting plate 18 is fixed to the rubber block 17. A column 19 is fixed to the connecting plate 18. A hemispherical buffer pad 20 is fixed to the upper side of the column 19. A fixing frame 21 is fixed to the bracket 1. Two guide rails 22 are fixed to the fixing frame 21. Two sliders 23 are slidably connected to the two guide rails 22. A rectangular shell 24 is fixed between adjacent sliders 23. A horizontal plate 25 with equal spacing is fixed inside the rectangular shell 24. Two electric push rods 26 are fixed to the fixing frame 21. The telescopic end of the electric push rod 26 is fixed to the adjacent rectangular shell 24.

[0027] In this embodiment, when it is necessary to reduce the vibration amplitude at the discharge port of the vibrating screen body 5, two electric push rods 16 are activated. The extension and retraction of the electric push rods 16 cause the parts on them to move upward. When the column 19 moves to the specified height, the electric push rods 16 are turned off. When the vibrating screen body 5 moves downward, it is blocked by the column 19 and the buffer pad 20 on it, thereby reducing the vibration amplitude at the discharge port of the vibrating screen body, reducing the throwing height and rolling speed of the material at the discharge port of the vibrating screen body 5, and improving the screening effect of nicotinamide raw materials.

[0028] After the column 19 reaches the designated height, the two electric push rods 26 are activated. The two electric push rods 26 drive the rectangular shell 24 to slide along the two guide rails 22, thereby inserting the connecting plate 18 into the two rectangular shells 24. The horizontal plate 25 contacts the adjacent connecting plate 18, thereby providing a certain supporting force to the connecting plate 18. This reduces the impact force of the vibrating screen body 5, which is fully applied to the extension end of the electric push rods 26, thus improving the stability of the device during use.

[0029] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vibrating screen for nicotinamide production, comprising a support (1), wherein four fixed seats (2) are fixedly connected to the support (1), springs (3) are fixedly connected to the fixed seats (2), and fixed seats (4) are fixedly connected to the springs (3), and a vibrating screen body (5) is fixedly connected between the four fixed seats (4), characterized in that: A dual-shaft motor (6) is fixedly connected to the lower side of the vibrating screen body (5). An eccentric wheel (7) is fixedly connected to the output shaft of the dual-shaft motor (6). A fixed column (8) is fixedly connected to the output shaft of the dual-shaft motor (6). A connecting shell (9) is fixedly connected to the fixed column (8). A sealing cover (10) is fixedly connected to the connecting shell (9). A connecting pipe (11) is embedded in the fixed column (8). The connecting pipe (11) is connected to the connecting shell (9). The bracket (1) is provided with a control structure and a limiting structure.

2. The vibrating screen according to claim 1, characterized in that: The connecting shell (9) is oriented in the same direction as the eccentric wheel (7).

3. The vibrating screen according to claim 1, characterized in that: The connecting pipe (11) is rotatably connected to a rotating sleeve, and the connecting pipe (11) is L-shaped.

4. The vibrating screen according to claim 1, characterized in that: The control structure includes a water tank (12), which is fixed to the lower side of the bracket (1). A water pump (13) is fixed to the water tank (12). The water pump (13) is fixed to and connected to two connecting hoses (14). The connecting hoses (14) are fixed to the rotating sleeve of the adjacent connecting pipe (11).

5. The vibrating screen according to claim 1, characterized in that: The limiting structure includes two fixing blocks (15), which are fixed to the left side of the bracket (1). Each fixing block (15) is fixed to an electric push rod (16), and the telescopic end of the electric push rod (16) is fixed to a rubber block (17). The rubber block (17) is fixed to a connecting plate (18), and the connecting plate (18) is fixed to a column (19).

6. The vibrating screen for nicotinamide production according to claim 5, characterized in that: The upper side of the column (19) is fixed with a hemispherical buffer pad (20).

7. The vibrating screen for feeding nicotinamide production according to claim 5, characterized in that: The bracket (1) is fixedly connected to a fixed frame (21), and the fixed frame (21) is fixedly connected to two guide rails (22). Each guide rail (22) is slidably connected to two sliders (23). A rectangular shell (24) is fixedly connected between adjacent sliders (23). A horizontal plate (25) with equal spacing is fixedly connected inside the rectangular shell (24). The fixed frame (21) is fixedly connected to two electric push rods (26). The telescopic end of the electric push rods (26) is fixedly connected to the adjacent rectangular shell (24).

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