Powder filling mechanism and automatic split charging equipment

Abstract

The invention relates to the field of powder filling equipment. The powder filling mechanism comprises a metering cylinder and a discharging head. The metering cylinder comprises an outer cylinder and a central cylinder arranged in the outer cylinder in a penetrating manner, and a feeding hole is formed in one end of the central cylinder; a rotary cavity is formed between the outer cylinder and the central cylinder, and a material passing opening for communicating the rotary cavity with an inner cavity of the central cylinder is formed in the central cylinder at the lower part of one side of the rotary cavity; a material pushing block which is matched with the thickness of the rotary cavity and can rotate along the rotary cavity is also arranged in the rotary cavity; and the rotary cavity outside a filling area of the material pushing block forms a metering area. A traditional structure adopting a screw pump type powder filling machine for powder filling is abandoned, a horizontal double-layer cylinder metering structure is adopted, and accurate and rapid powder filling can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of powder filling equipment, and in particular to a powder filling mechanism and automatic subpackaging equipment. Background Art

[0002] Powder filling machines are highly efficient and precise packaging equipment. They typically use a twin-screw pump as a metering device. A motor-driven screw rotates, transferring powdered material from a hopper into a packaging container. These machines offer accurate metering, fast filling speeds, and high stability, making them widely used for filling powder products in the food, pharmaceutical, and chemical industries. They are easy to operate, allowing for control of the filling volume by adjusting the screw speed and filling time. These machines can accommodate containers of varying sizes, effectively improving production efficiency and reducing labor intensity, making them a common device for powder product packaging. However, due to their inherent limitations, which stem from the principle of adjusting the filling volume by adjusting the screw speed or pitch, their filling accuracy can be subject to certain instabilities. Over time, screw wear can exacerbate these inaccuracies. While some high-precision screw filling equipment exists on the market, they are generally expensive, resulting in high procurement costs. This presents a significant burden for companies with large-scale filling needs. Therefore, achieving high-speed, high-precision powder filling through a simpler, more cost-effective method has long been a challenge in this field. Summary of the Invention

[0003] The object of the present invention is to provide a powder filling mechanism and automatic packaging equipment capable of achieving high-precision and high-speed filling.

[0004] To achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is a powder filling mechanism, comprising a metering cylinder and a discharge head;

[0005] The metering cylinder includes an outer cylinder and a central cylinder inserted into the outer cylinder, and a feed port is provided at one end of the central cylinder; a rotary cavity is formed between the outer cylinder and the central cylinder, and a feed port is provided on the central cylinder at the lower part of one side of the rotary cavity, connecting the rotary cavity with the inner cavity of the central cylinder; a pusher block is also provided in the rotary cavity, which matches the thickness of the rotary cavity and can rotate along the rotary cavity, and the rotary cavity outside the area filled by the pusher block constitutes a metering area;

[0006] A discharge head and an installation box are provided below the outer cylinder; the discharge head is communicated with the rotary cavity; a telescopic plate is provided in the installation box, which can extend into and separate the rotary cavity and can be retracted into the installation box under the push of the pushing block.

[0007] Preferably, both ends of the central cylinder extend beyond the outer cylinder; the outer cylinder includes a cylinder body, and a rotating disk and a cover arranged at both ends of the cylinder body; the rotating disk is in rotational cooperation with the cylinder body and the central cylinder, and the pusher block is connected to the rotating disk and driven by the rotating disk; the cover is detachably connected to the outer cylinder and encapsulates the pusher block in the rotary chamber.

[0008] Preferably, the pusher block is provided with a protrusion at one end close to the rotating disk, the rotating disk is provided with a groove matching the protrusion, and the connection between the pusher block and the rotating disk is formed by inserting the protrusion into the groove.

[0009] Preferably, it further comprises a driving worm, which is mounted on the back side of the outer cylinder through a supporting seat; and a driving worm wheel meshing with the driving worm is provided on the circumferential surface of the rotating disk.

[0010] Preferably, two vertical guide rods are provided in the installation box, the telescopic plate is L-shaped, the horizontal edge of the telescopic plate is sleeved outside the guide rod and forms a sliding fit with the guide rod; the vertical edge of the telescopic plate penetrates into the rotating cavity; the outer sleeve of the guide rod below the horizontal edge of the telescopic plate is provided with a support spring; the cross-section of the upper end of the horizontal edge of the telescopic plate is semicircular, and the two side edges of the pushing block are arc-shaped.

[0011] Preferably, the inner cavity of the central tube is provided with a forced material distribution component, and the forced material distribution component includes a rotating shaft arranged in the central tube, and a plurality of material distribution scrapers arranged outside the rotating shaft; the material distribution scrapers are connected to the shaft sleeve through a connecting rod, and the shaft sleeve is arranged outside the rotating shaft and fixedly connected to the rotating shaft.

[0012] Preferably, the discharge port gradually becomes smaller from top to bottom, and the lower end is detachably connected to a filling nozzle for cooperating with a filling container.

[0013] Preferably, a vibration motor is also provided on the side wall of the discharge port.

[0014] Preferably, the packaging equipment includes several groups of powder filling mechanisms arranged in a row, and the rotating shafts and driving worms of the powder filling mechanisms are connected by couplings; a temporary storage hopper is provided on the upper part of every two powder filling mechanisms, and the temporary storage hopper is connected to the feed port at one end of the central cylinder through a feed pipe, and the two adjacent groups of powder filling mechanisms are symmetrically distributed on the left and right.

[0015] The beneficial effects of the present invention are primarily reflected in its abandonment of the traditional structure of powder filling using a screw pump-type powder filling machine and its adoption of a horizontal double-drum metering structure, enabling precise and rapid powder filling. Specifically, during use, the present invention introduces material into the central drum from the feed inlet. Under the action of gravity (or the feeding action of a preferably provided forced feeding assembly), the material in the central drum enters the rotary chamber through the feed port. As the pusher block continues to move, the metering area is filled. The pusher block continuously pushes the material along the rotary chamber, and through the squeezing action of the pusher block and the telescopic plate, the material in the metering area is squeezed into the discharge head, from which the material falls into the filling container. The double-drum design employed by the present invention enables the pusher block to fill a fixed amount of material once per complete rotation, achieving not only high accuracy but also a significant improvement in overall filling speed. When different metering is required, it is only necessary to replace the pusher block with a different volume ratio relative to the rotary chamber. Although the adjustment convenience of filling metering is somewhat lower than that of the screw pump filling machine, its overall operating speed is fast and the filling accuracy is high. It is especially suitable for enterprises with mature and stable large-scale powder product filling needs. The overall structure of the present invention is compact and exquisite, and is suitable for flexible configuration according to the needs of different enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 for Figure 1 AA view of the structure shown in;

[0018] Figure 3 for Figure 2 Enlarged view of middle part B;

[0019] Figure 4 It is a structural diagram of the pusher block;

[0020] Figure 5 This is a structural diagram of the automatic packaging equipment. DETAILED DESCRIPTION

[0021] like Figure 1-4 As shown, a powder filling mechanism is used for quantitative high-speed filling of powder materials. It adopts a double-layer cylinder design with a compact and delicate structure, suitable for the joint use of multiple powder filling mechanisms. Figure 1 As shown in the figure, the present invention includes a metering cylinder 1 and a discharge head 2. The metering cylinder 1 is used to measure the volume of the material, and the discharge head 2 is used to guide the measured powder into the filling container. The present invention is particularly suitable for filling powder materials with a low total amount in a single bottle, such as a vial.

[0022] Combine Figure 1 and 2As shown in FIG, the metering cylinder 1 of the present invention comprises an outer cylinder 0 and a central cylinder 3 passing through the outer cylinder 0. One end of the central cylinder 3 is provided with a feed port 4 for introducing materials. Figure 2 As shown in FIG, a rotary chamber 5 is formed between the outer cylinder 0 and the central cylinder 3 of the present invention. A material port 6 is provided on the central cylinder 3 at the lower portion of one side of the rotary chamber 5, connecting the rotary chamber 5 with the inner cavity of the central cylinder 3. Material can enter the rotary chamber 5 from the central cylinder 3 through the material port 6. A pusher block 7 is also provided within the rotary chamber 5, adapted to the thickness of the rotary chamber 5 and capable of rotating along the rotary chamber 5. The portion of the rotary chamber 5 outside the area filled by the pusher block 7 constitutes a metering area 8.

[0023] In other words, the metering of the present invention is accomplished through the metering area 8. The size of the metering area 8 can be changed by changing the size of the pusher block 7. In theory, the maximum measurable volume of the metering area 8 is close to the size of the rotary chamber 5. However, considering the stability of the operation of the pusher block 7, the volume of the metering area 8 should generally not exceed 2 / 3 of the volume of the rotary chamber 5. A discharge head 2 and an installation box 9 are provided below the outer cylinder 0. The discharge head 2 is connected to the rotary chamber 5, but the installation box 9 is provided with a telescopic plate 10 that can extend into and separate the rotary chamber 5 and can be retracted into the installation box 9 under the push of the pusher block 7. The pusher block 7 needs to run one circle before it can push the material to the discharge head 2.

[0024] The telescopic plate 10 has many specific structures. For example, it can be controlled by an electromagnetic push rod to extend and retract the telescopic plate 10 in coordination with the rotation of the push block 7. However, this requires a high response speed of the electromagnetic push rod. At the same time, since the overall rotation speed of the push block 7 of the present invention is relatively fast, when the electromagnetic push rod and other components are damaged, the telescopic plate 10 may not be able to retract in time, resulting in a plate break. In a better approach of the present invention, the telescopic plate 10 can automatically extend and retract in coordination with the movement of the push block 7. Figure 3 As shown in FIG, two vertical guide rods 17 are provided within the mounting box 9. The telescopic plate 10 is L-shaped, with its horizontal edge 18 slidingly fitted over the guide rods 17. The vertical edge 19 of the telescopic plate 10 extends into the rotary chamber 5. Support springs 20 are provided around the guide rods 17 below the horizontal edge 18 of the telescopic plate 10. The upper end of the horizontal edge 18 of the telescopic plate 10 has a semicircular cross-section, and the two sides of the pusher block 7 are curved.

[0025] During use, the present invention introduces the material into the central tube 3 from the feed port 4, and the material in the central tube 3 enters the rotary chamber 5 from the feed port 6 under the action of gravity. However, in order to improve the stability of the material entering the rotary chamber 5 from the feed port 6, the present invention can be used to distribute the material through a forced distribution component set in the central tube 3. Figure 1 and 2As shown, the forced material distribution assembly includes a rotating shaft 21 disposed within the central cylinder 3 and a plurality of material distribution scrapers 22 disposed outside the rotating shaft 21. The material distribution scrapers 22 are connected to a sleeve via a connecting rod. The sleeve is mounted outside the rotating shaft 21 and is fixed to the rotating shaft 21. As the rotating shaft 21 rotates, the material distribution scrapers 22 are activated, steadily pressing the material through the feed port 6 into the rotary chamber 5.

[0026] As the push block continues to move, the metering area 8 is filled; the push block 7 continuously pushes the material along the rotary chamber 5, and through the extrusion effect of the push block 7 and the telescopic plate 10, the material in the metering area 8 is squeezed out and sent to the discharge head 2, and the material falls into the filling container from the discharge head 2. The double-layer barrel design adopted by the present invention allows the push block 7 to quantitatively fill the material once every rotation, which not only has high accuracy, but also has a significant effect on improving the overall filling speed. When different metering is required, it is only necessary to replace the push block 7 with a different volume ratio relative to the rotary chamber 5. Although the convenience of adjusting the filling metering is somewhat lower than that of the screw pump filling machine, its overall operating speed is fast and the filling accuracy is high. It is especially suitable for enterprises with mature and stable large-scale powder product filling needs. The overall structure of the present invention is compact and exquisite, suitable for flexible assembly according to the needs of different enterprises.

[0027] In order to facilitate the rapid installation and removal of the pusher block 7, to improve the efficiency and convenience of replacement, and to ensure the stability of the overall installation of the metering cylinder 1. Figure 1 As shown in , both ends of the center cylinder 3 extend beyond the outer cylinder 0. The outer cylinder 0 includes a cylinder body, and a rotating disk 11 and a cover 12 arranged at both ends of the cylinder body. The rotating disk 11 is rotationally matched with the cylinder body and the center cylinder 3, and the pusher block 7 is connected to the rotating disk 11 and driven by the rotating disk 11. The cover 12 is detachably connected to the outer cylinder 0, and the pusher block 7 is enclosed in the rotary chamber 5. Under this structure, when the pusher block 7 needs to be replaced, the mounting screws of the cover 12 are removed, and the pusher block 7 can be quickly taken out. In order to ensure sealing, the cover 12 and the rotating disk 11 are usually composed of two halves, and an annular metal sealing ring is clamped at the position where the two halves contact the center cylinder 3. Regarding the connection form between the pusher block 7 and the rotating disk 11, combined with Figure 1 and 4 As shown, a protrusion 13 is provided at one end of the pusher block 7 close to the rotating disk 11, and a groove matching the protrusion 13 is provided on the rotating disk 11. The connection between the pusher block 7 and the rotating disk 11 is formed by inserting the protrusion 13 into the groove, which is convenient for quick disassembly and power connection.

[0028] Regarding the driving structure of the rotating disk 11, the present invention can adopt a worm and worm gear combination drive, or other similar driving structures. Figure 2As shown in , when a worm gear drive is adopted, the present invention further comprises a driving worm 14, which is mounted on the back side of the outer cylinder 0 through a supporting seat 15. A driving worm wheel 16 meshing with the driving worm 14 is provided on the circumference of the rotating disk 11.

[0029] In addition, in order to facilitate the material to enter the filling container more stably, the discharge port gradually becomes smaller from top to bottom, and the lower end is detachably connected to a filling nozzle 23 for cooperating with the filling container. The figure shows only an example. In actual production, the size of the filling nozzle 23 can be reasonably designed according to the size of the bottle mouth of the filling container. In order to improve the falling stability of the material in the discharge head 2, a vibration motor 24 is also provided on the side wall of the discharge port, and the vibration motor 24 is used to improve the overall material fluidity. Of course, on this basis, vibration isolation can be achieved by certain means to prevent excessive vibration from being transmitted to the metering cylinder 1 and interfering with the operation of components such as the worm gear.

[0030] The powder filling mechanism of the present invention can be applied to automatic powder filling equipment and can be used in conjunction with other equipment for production. Figure 5 As shown in FIG, the apparatus comprises several groups of powder filling mechanisms arranged in a row, wherein the rotating shafts 21 and the drive worms 14 of the powder filling mechanisms are connected by couplings 25. A temporary storage hopper 26 is provided above each pair of powder filling mechanisms, and the temporary storage hopper 26 is connected to the feed port 4 at one end of the central cylinder 3 via a feed pipe 27. Adjacent groups of powder filling mechanisms are symmetrically arranged.

[0031] The utility model also comprises a conveying device arranged below the powder filling mechanism for conveying the filling container.

[0032] A screw conveyor is provided above the temporary storage hopper 26 , and the screw conveyor is communicated with each temporary storage hopper 26 .

Claims

1. A powder filling mechanism, characterized in that: It includes a metering cylinder (1) and a discharge head (2); The metering cylinder (1) comprises an outer cylinder (0) and a central cylinder (3) inserted into the outer cylinder (0), and a feed port (4) is provided at one end of the central cylinder (3); a rotary cavity (5) is formed between the outer cylinder (0) and the central cylinder (3), and a feed port (6) is provided on the central cylinder (3) at the lower part of one side of the rotary cavity (5) for connecting the rotary cavity (5) with the inner cavity of the central cylinder (3); a pusher block (7) is further provided in the rotary cavity (5) and matches the thickness of the rotary cavity (5) and can rotate along the rotary cavity (5), and the rotary cavity (5) outside the filling area of the pusher block (7) constitutes a metering area (8); A discharge head (2) and a mounting box (9) are provided below the outer cylinder (0); the discharge head (2) is communicated with the rotary chamber (5); and a telescopic plate (10) is provided in the mounting box (9), which can extend into and separate the rotary chamber (5) and can be retracted into the mounting box (9) under the push of the pushing block (7).

2. The powder filling mechanism according to claim 1, characterized in that: Both ends of the central cylinder (3) extend beyond the outer cylinder (0); the outer cylinder (0) comprises a cylinder body, and a rotating disk (11) and a cover (12) arranged at both ends of the cylinder body; the rotating disk (11) is in rotational cooperation with the cylinder body and the central cylinder (3); the pusher block (7) is connected to the rotating disk (11) and is driven by the rotating disk (11); the cover (12) is detachably connected to the outer cylinder (0) and encloses the pusher block (7) in the rotary chamber (5).

3. The powder filling mechanism according to claim 2, characterized in that: A protrusion (13) is provided at one end of the pusher block (7) close to the rotating disk (11), and a groove matching the protrusion (13) is provided on the rotating disk (11). The connection between the pusher block (7) and the rotating disk (11) is formed by inserting the protrusion (13) into the groove.

4. The powder filling mechanism according to claim 3, characterized in that: It also includes a driving worm (14), which is mounted on the back side of the outer cylinder (0) via a supporting seat (15); and a driving worm wheel (16) meshing with the driving worm (14) is provided on the circumferential surface of the rotating disk (11).

5. The powder filling mechanism according to claim 4, characterized in that: Two vertical guide rods (17) are provided in the installation box (9); the telescopic plate (10) is L-shaped; the horizontal edge (18) of the telescopic plate (10) is sleeved outside the guide rod (17) and forms a sliding fit with the guide rod (17); the vertical edge (19) of the telescopic plate (10) penetrates into the rotary cavity (5); the outer sleeve of the guide rod (17) below the horizontal edge (18) of the telescopic plate (10) is provided with a support spring (20); the cross section of the upper end of the horizontal edge (18) of the telescopic plate (10) is semicircular, and the two side edges of the pusher block (7) are arc-shaped.

6. The powder filling mechanism according to claim 5, characterized in that: The inner cavity of the central cylinder (3) is provided with a forced material distribution assembly, which includes a rotating shaft (21) arranged in the central cylinder (3) and a plurality of material distribution scrapers (22) arranged outside the rotating shaft (21); the material distribution scrapers (22) are connected to the shaft sleeve through a connecting rod, and the shaft sleeve is sleeved outside the rotating shaft (21) and fixed to the rotating shaft (21).

7. The powder filling mechanism according to claim 6, characterized in that: The discharge port gradually becomes smaller from top to bottom, and the lower end is detachably connected to a filling nozzle (23) for cooperating with a filling container.

8. The powder filling mechanism according to claim 7, characterized in that: A vibration motor (24) is also provided on the side wall of the discharge port.

9. An automatic powder packaging device, characterized in that: A powder filling mechanism according to any one of claims 1 to 9 is used.

10. The automatic powder packaging equipment according to claim 9, characterized in that: The invention comprises a plurality of powder filling mechanisms arranged in a row, wherein the rotating shafts (21) of the powder filling mechanisms and the driving worms (14) are connected via couplings (25); a temporary storage hopper (26) is provided on the upper part of each two powder filling mechanisms, and the temporary storage hopper (26) is connected to the feed port (4) at one end of the central cylinder (3) via a feed pipe (27), and the two adjacent powder filling mechanisms are symmetrically distributed on the left and right.

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