Multi-column feeder for powder materials

Abstract

The utility model discloses a kind of multi-row feeders for powder material, including material box, discharging screw and drive unit, the bottom of material box is provided with several first discharge holes, the bottom in material box is provided with several guide recesses, by guide recess to the powder material of accumulation is gathered and guided flow to first discharge hole, drive unit includes power component and center shaft, center shaft rotation is set in material box, the top end of discharging screw and the end of center shaft movable splicing make it coaxial, the outer periphery of the splicing place of center shaft and discharging screw is slidably sleeved with sliding sleeve, prevent discharging screw from center shaft when rotating and disengaging, realize rotary power transmission. Compared with prior art beneficial effects: with the function of gathering material and improving fluidity, the connection mode of discharging screw and center shaft and the mode of cooperating sliding sleeve greatly simplify the connection structure and realize the function of quick disassembly, effectively reduce the cost and disassembly time when equipment is cleaned.

Description

Technical Field

[0001] This utility model relates to the technical field of material supply equipment, and in particular to a multi-row feeding device for powder materials. Background Technology

[0002] In the field of quantitative packaging of powdered materials, multi-row packaging machines are widely used due to their high efficiency and synchronous operation. The feeding device, as the core component of this equipment, directly affects the feeding accuracy, packaging speed, and overall production stability. In existing technologies, the feeding device of a multi-row packaging machine typically includes a material bin and a feeding screw rotating within the bin. In practical applications, existing technologies mainly face the following two prominent problems:

[0003] Firstly, regarding material flowability, traditional hopper bottoms are often designed as simple flat bottoms or conical structures with a single taper. Because powdered materials generally have a high coefficient of internal friction, uneven flowability, and a tendency to absorb moisture and form bridging patterns, this type of bottom structure makes it difficult for the material to smoothly and evenly converge towards the central discharge port under its own weight. Material tends to accumulate and leave residues on the corners or side walls of the hopper, leading to fluctuations in effective conveying capacity and consequently affecting the accuracy and stability of downstream screw metering. Furthermore, the long-term accumulation of residual material not only wastes raw materials but also increases the risk of cross-contamination when changing material types, which is particularly detrimental to industries with strict hygiene requirements, such as food and pharmaceuticals. Therefore, optimizing the hopper's bottom structure to guide powdered material to naturally converge towards the discharge port, ensuring smooth discharge and reducing residue, has become one of the keys to improving packaging machine performance.

[0004] Secondly, regarding the ease of maintenance of the feeding screw, after long-term conveying of powder or fine particulate materials, the surface and helical gaps of the feeding screw are prone to material adhesion, requiring regular disassembly for cleaning or replacement to adapt to the characteristics of different materials. In existing designs, the screw is usually rigidly connected to the drive shaft via keys, pins, or flange bolts. While these screw connection methods are structurally sound, disassembly and installation are cumbersome, require specialized tools, and are often time-consuming. On continuous production lines, frequent or prolonged downtime for maintenance significantly reduces equipment utilization and increases labor costs. This problem is particularly pronounced on multi-row packaging machines where the simultaneous maintenance of multiple feeding stations exacerbates the issue. Therefore, there is a strong need for a structure that allows for quick disassembly and assembly between the feeding screw and the drive shaft to simplify daily cleaning, maintenance, and specification change processes, adapting to efficient and flexible production rhythms.

[0005] In summary, existing multi-row packaging machine hoppers have significant shortcomings in promoting powder material flowability and facilitating the maintenance of key components. To address these deficiencies, the bottom configuration of the hopper is optimized through hydrodynamics, and a highly efficient and reliable quick-release connection structure is designed. This is of great significance for improving packaging accuracy, reducing material loss, enhancing overall equipment efficiency, and adapting to flexible production needs. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a multi-row feeding device for powder materials.

[0007] To achieve the above objectives, this utility model discloses a multi-row feeding device for powdered materials, comprising:

[0008] The material bin has several first discharge holes at its bottom and several guiding recesses at its bottom. The bottom of each guiding recess is connected to the first discharge holes. The guiding recesses gather and guide the accumulated powder material to flow to the first discharge holes.

[0009] A feeding screw, which rotates through the first discharge hole.

[0010] The drive unit includes a power element and a central rotating shaft. The central rotating shaft is rotatably disposed inside the material box. The top end of the feeding screw is movably spliced ​​with the end of the central rotating shaft to make them coaxial. A sliding sleeve is slidably fitted on the outer periphery of the splice between the central rotating shaft and the feeding screw. The sliding sleeve prevents the feeding screw from disengaging from the central rotating shaft when rotating, so as to realize the rotational power of the central rotating shaft to the feeding screw.

[0011] The power element is used to drive the central rotating shaft to rotate, and in conjunction with the rotation of the feeding screw, to spirally output the powder material in the guiding recess from the first discharge hole.

[0012] Furthermore, the bottom of the sliding sleeve extends downward and is provided with a pair of ears. The outer periphery of the top of the feeding screw is provided with unlocking positions on both sides. Rotating the sliding sleeve causes the inner wall of the ears to fit against the outer periphery of the feeding screw to stop, or causes the ears to slide upward within the unlocking positions.

[0013] Furthermore, the distance between the pair of ears is equal to the diameter of the feed screw, the inner wall of the ear is an arc shape that fits against the outer periphery of the feed screw, and the diameter between the unlocking positions is smaller than the distance between the pair of ears.

[0014] Furthermore, a limiting post is provided on the outer periphery of each of the two unlocking positions, extending horizontally outward. The two limiting posts are staggered one after the other. The ear fits against the outer periphery of the feeding screw and abuts against the limiting post.

[0015] The direction of rotation of the ear to the unlock position is opposite to the direction of rotation of the central axis.

[0016] Furthermore, the outer periphery of the feeding screw is provided with an annular groove, and the inner wall of the ear is provided with a protruding insertion part, which is movably inserted into the annular groove as the sliding sleeve rotates.

[0017] Furthermore, a second discharge hole communicating with the first discharge hole is provided at the bottom of the material guiding recess, and the perimeter of the material guiding recess is arranged in an arc-shaped curved surface.

[0018] Furthermore, a connecting post protrudes from the top of the feeding screw, and the top of the connecting post is movably connected to the end of the central rotating shaft. The sliding sleeve is slidably fitted on the outer periphery of the connection between the feeding screw and the connecting post, and its bottom abuts against the top of the feeding screw.

[0019] Furthermore, a first splicing position is provided on the outer periphery of the end of the central rotating shaft, and a second splicing position is provided on the outer periphery of the connecting column to cooperate with the first splicing position. The second splicing position and the first splicing position are connected by a snap-fit ​​connection so that the feeding screw and the central rotating shaft are mechanically connected.

[0020] Furthermore, the diameter of the connecting post is the same as the diameter of the central rotating shaft, and the inner diameter of the sliding sleeve corresponds to the diameters of the central rotating shaft and the connecting post.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] 1. By setting the curved surface, the flowability of powder materials in the hopper can be effectively improved, thereby reducing the amount of powder material remaining in the corners of the hopper.

[0023] 2. The connection method between the feeding screw and the central rotating shaft, as well as the method of using the sliding sleeve, greatly simplifies the connection structure and enables quick disassembly, effectively reducing the cost and disassembly time during equipment cleaning. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this embodiment;

[0025] Figure 2 This is a cross-sectional view of the overall structure of this embodiment;

[0026] Figure 3 This is a schematic diagram showing the splicing state of the central rotating shaft and the connecting column in this embodiment;

[0027] Figure 4 This is a schematic diagram of the sliding sleeve in the unlocked position in this embodiment;

[0028] Figure 5 This is a schematic diagram showing the contact arrangement between the lug of the sliding sleeve and the feed screw in this embodiment. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will be combined with... Figures 1-5 The accompanying drawings provide a further detailed description of this utility model.

[0030] Reference Figures 1-2 As shown, a multi-row feeding device for powder materials includes a material box 1, a plurality of feeding screws 2 and a drive unit 3. The bottom of the material box 1 is provided with a plurality of first discharge holes 11, which are evenly spaced along the length of the material box.

[0031] In this embodiment, the number of first discharge holes 11 and drive units 3 is the same as the number of feeding screws 2.

[0032] The feeding screw 2 is rotatably installed inside the material box 1, and its bottom end passes through the first discharge hole 11. The drive unit 3 is fixedly installed on the top of the material box 1 to drive the feeding screw 2 to rotate.

[0033] Furthermore, the bottom of the material box 1 is provided with a plurality of material guiding recesses 4 facing downwards. In this embodiment, the number of material guiding recesses 4 corresponds to the number of first discharge holes 11. The bottom of the material guiding recesses 4 is provided with a second discharge hole 41, which is concentrically arranged with the first discharge hole 11 and is connected to it.

[0034] Furthermore, the material guiding recess 4 is arranged in an arc-shaped curved surface around its perimeter. This arc-shaped curved surface causes the material in the material guiding recess 4 to converge and flow towards the second discharge hole 41, and then be discharged from the material box 1 through the first discharge hole 11. Compared with the prior art, the arc-shaped curved surface effectively improves the flowability of powder material in the material box 1, thereby reducing the amount of powder material remaining in the corners of the material box 1.

[0035] The lower half of the feeding screw 2 passes through the second discharge hole 41 and the first discharge hole 11 in sequence.

[0036] The drive unit 3 includes a power element 31 and a central rotating shaft 32. In this embodiment, the power element 31 is a common power element 31 used to drive rotational motion, such as a servo motor. The power element 31 is fixedly installed on the top surface of the material box 1 and is concentrically arranged with the feeding screw 2. The top end of the central rotating shaft 32 is connected to the output end of the power element 31, and its bottom end passes through the top of the material box 1 into the material box 1. The outer periphery of the central rotating shaft 32 is airtightly connected to the material box 1 for rotation.

[0037] Combined Figure 3 As shown, a first splicing position 321 is provided on the outer periphery of the end of the central rotating shaft 32. A connecting post 21 protrudes upward from the center of the top of the feeding screw 2. In this embodiment, the diameter of the connecting post 21 is the same as the diameter of the central rotating shaft 32. A second splicing position 22 is provided on the outer periphery of the connecting post 21 to cooperate with the first splicing position 321. A sliding sleeve 33 is slidably provided on the outer periphery between the central rotating shaft 32 and the connecting post 21.

[0038] In this embodiment, the first splicing position 321 and the second splicing position 22 are spliced ​​together by a snap-fit ​​method, which is a well-known technology in the field and will not be described here.

[0039] In use, the first splicing position 321 and the second splicing position 22 are spliced ​​together, so that the central rotating shaft 32 and the feeding screw 2 are coaxial and mechanically connected to realize the transmission of rotational power. At the same time, the sliding sleeve 33 is slidably set on the outer periphery of the splice between the central rotating shaft 32 and the feeding screw 2 to limit the lateral freedom of the feeding screw during rotation and prevent it from separating from the central rotating shaft. The bottom of the sliding sleeve 33 is in contact with the top of the feeding screw 2.

[0040] It should be noted that the diameter of the inner hole of the sliding sleeve 33 corresponds to the diameter of the central rotating shaft 32 and the connecting column 21.

[0041] Reference Figure 4 As shown, further, a pair of ears 331 are provided extending downward from the bottom edge of the sliding sleeve 33, and the pair of ears 331 are symmetrically arranged with the center of the sliding sleeve 33 as the center. The distance between the pair of ears 331 is equal to the diameter of the feeding screw 2.

[0042] Combined Figure 3 As shown, unlocking positions 23 are provided on both sides of the outer periphery of the feeding screw 2. Limiting posts 24 are provided on the outer periphery of the feeding screw 2 located within the unlocking positions 23 and extended outward horizontally. The two limiting posts 24 are staggered.

[0043] In this embodiment, the inner wall of the ear portion 331 is an arc shape that fits against the outer periphery of the feed screw 2.

[0044] Reference Figure 5As shown, when the sliding sleeve 33 is slidably disposed on the outer periphery of the splice between the central rotating shaft 32 and the feeding screw 2, rotating the sliding sleeve 33 causes the inner wall of the ear 331 to contact the outer periphery of the feeding screw 2, and at the same time the ear 331 abuts against the limiting post 24, thereby preventing the sliding sleeve 33 from sliding upward, and at this time it is in a locked state.

[0045] Reference Figure 4 As shown, when the sliding sleeve 33 needs to slide upward, rotate the sliding sleeve 33 so that its ear 331 is in the unlocking position 23. Since the distance between the unlocking positions 23 is less than the distance between the pair of ears 331, the sliding sleeve 33 can slide upward to the upper half of the central rotating shaft 32 to realize the disassembly of the central rotating shaft 32 and the connecting post 21.

[0046] It should be noted that the unlocking rotation direction of the sliding sleeve 33 is opposite to the rotation direction of the central rotating shaft 32.

[0047] Reference Figure 3 and Figure 5 As shown, further, the outer periphery of the feeding screw 2 is provided with an annular groove 25, and the inner wall of the ear 331 is provided with a protruding insertion part 332. The insertion part 332 is movably inserted into the annular groove 25 as the sliding sleeve 33 rotates. Compared with the prior art, by cooperating with the annular groove 25, the sliding sleeve 33 is abutted against the feeding screw 2, further preventing the sliding sleeve 33 from sliding upward and ensuring the connection and stability of the feeding screw 2 and the central rotating shaft 32 during operation.

[0048] In this embodiment, the connection method between the feeding screw 2 and the central rotating shaft 32, as well as the method of cooperating with the sliding sleeve 33, compared with the existing multi-row powder screw connection method, simplifies the connection structure and achieves the function of quick disassembly, effectively reducing the cost and disassembly time during equipment cleaning, and effectively reducing the overall height of the feeding device, thus effectively reducing the production cost of the equipment.

[0049] Regarding the connection between the feed screw 2 and the central rotating shaft 32, this embodiment provides three layers of protection. The first layer of protection is that the sliding sleeve 33 fits against the outer periphery of the feed screw 2 through the lug 331. The second layer of protection is that the unlocking direction of the sliding sleeve 33 is opposite to the rotation direction of the feed screw 2. When the central rotating shaft rotates in actual use, the centrifugal force generated, together with the limiting post 24, reliably limits the sliding sleeve 33 to the outer periphery of the two shafts. The third layer of protection is that an unlocking position 23 is set, and an upward sliding force is applied to the sliding sleeve 33. The sliding sleeve 33 can also be slid upward. In summary, the three layers of protection greatly improve the connection stability of the feed screw 2.

[0050] Of course, the above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They cannot be used to limit the protection scope of this utility model. All modifications made in accordance with the spirit of the main technical solution of this utility model should be covered within the protection scope of this utility model.

Claims

1. A multi-row feeding device for powdered materials, characterized in that, include: Material box (1), the bottom of the material box (1) is provided with a plurality of first discharge holes (11), the bottom of the material box (1) is provided with a plurality of guiding recesses (4), the bottom of the guiding recesses (4) is connected to the first discharge holes (11), and the accumulated powder material is gathered and guided to flow to the first discharge holes (11) through the guiding recesses (4). The feeding screw (2) is rotatably inserted into the first discharge hole (11); The drive unit (3) includes a power element (31) and a central rotating shaft (32). The central rotating shaft (32) is rotatably disposed in the material box (1). The top end of the feeding screw (2) is movably spliced ​​with the end of the central rotating shaft (32) to make them coaxial. A sliding sleeve (33) is slidably sleeved on the outer periphery of the splice between the central rotating shaft (32) and the feeding screw (2). The sliding sleeve (33) prevents the feeding screw (2) from disengaging from the central rotating shaft (32) when rotating, so as to realize the rotational power of the central rotating shaft (32) to the feeding screw (2). The power element (31) is used to drive the central rotating shaft (32) to rotate, and in conjunction with the feeding screw (2) to rotate, the powder material in the guiding recess (4) is spirally output from the first discharge hole (11).

2. The multi-row feeding device for powdered materials according to claim 1, characterized in that, The bottom of the sliding sleeve (33) extends downward and is provided with a pair of ears (331). The outer periphery of the top of the feed screw (2) is provided with unlocking positions (23) on both sides. Rotating the sliding sleeve (33) causes the inner wall of the ears (331) to fit against the outer periphery of the feed screw (2) to stop or causes the ears (331) to slide upward within the unlocking positions (23).

3. The multi-row feeding device for powdered materials according to claim 2, characterized in that, The distance between the pair of ears (331) is equal to the diameter of the feed screw (2), the inner wall of the ear (331) is an arc shape that fits the outer periphery of the feed screw (2), and the diameter between the unlocking positions (23) is smaller than the distance between the pair of ears (331).

4. The multi-row feeding device for powdered materials according to claim 3, characterized in that, A pair of unlocking positions (23) are provided with limiting posts (24) extending horizontally outward from their outer periphery. The two limiting posts (24) are staggered front and back. The ear (331) fits against the outer periphery of the feeding screw (2) and abuts against the limiting post (24). The direction of rotation of the ear (331) to the unlock position (23) is opposite to the direction of rotation of the central pivot (32).

5. The multi-row feeding device for powdered materials according to any one of claims 2-4, characterized in that, The outer periphery of the feeding screw (2) is provided with an annular groove (25), and the inner wall of the ear (331) is provided with a plug-in part (332). The plug-in part (332) is movably inserted into the annular groove (25) as the sliding sleeve (33) rotates.

6. The multi-row feeding device for powdered materials according to claim 1, characterized in that, The bottom of the material guiding recess (4) is provided with a second discharge hole (41) that communicates with the first discharge hole (11), and the periphery of the material guiding recess (4) is provided in an arc-shaped curved surface.

7. The multi-row feeding device for powdered materials according to claim 1, characterized in that, The top end of the feeding screw (2) is provided with a connecting post (21), the top end of the connecting post (21) is movably spliced ​​with the end of the central rotating shaft (32), and the sliding sleeve (33) is slidably sleeved on the outer periphery of the connection between the feeding screw (2) and the connecting post (21), and its bottom abuts against the top of the feeding screw (2).

8. The multi-row feeding device for powdered materials according to claim 7, characterized in that, The outer periphery of the end of the central rotating shaft (32) is provided with a first splicing position (321), and the outer periphery of the connecting column (21) is provided with a second splicing position (22) that cooperates with the first splicing position (321). The second splicing position (22) and the first splicing position (321) are connected by a snap-fit, so that the feeding screw (2) and the central rotating shaft (32) are mechanically connected.

9. The multi-row feeding device for powder materials according to any one of claims 7 or 8, characterized in that, The diameter of the connecting post (21) is the same as the diameter of the central rotating shaft (32), and the inner diameter of the sliding sleeve (33) corresponds to the diameters of the central rotating shaft (32) and the connecting post (21).

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