Powder filling device

Abstract

The utility model provides a kind of powder filling device, belong to filter core preparation technical field, including base and guide assembly, the upper end surface of base is successively sleeved with outer sleeve pipe and inner rubber tube from outside to inside, the inner cavity of inner rubber tube is axially provided with mold core, and filler gap is formed between inner rubber tube and mold core, the lower end of mold core is fixed to the upper end surface of base, and the upper end of mold core is provided with threaded rod;Guide assembly includes guide ring, driving ring and connecting rod, guide ring is sleeved on mold core and located in filler gap, longitudinal through-hole is formed in guide ring, driving ring is rotatably sleeved on threaded rod and located above outer sleeve pipe, and connecting rod is longitudinally connected guide ring and driving ring.The powder filling device provided by the utility model ensures that the powder amount filled in each layer and the compaction degree are consistent, this layer-by-layer controllable filling mode can eliminate the density difference in depth direction, greatly improve the symmetry of the inner and outer walls of the filter core blank, to solve the problem of eccentricity of slender filter core.

Description

Technical Field

[0001] This utility model belongs to the field of filter element preparation technology, and more specifically, it relates to a powder filling device. Background Technology

[0002] In the field of industrial filtration, powder sintered filter elements are widely used in industries such as chemical, pharmaceutical, and food due to their high-precision filtration performance, good corrosion resistance, and long service life. Among them, slender powder sintered filter elements, such as those with a length-to-diameter ratio greater than 10:1, are increasingly in demand for applications such as precision pipeline filtration and small-scale equipment purification due to their high-efficiency filtration capabilities in confined spaces. The production of these filter elements typically relies on powder filling devices. The core principle is to fill the gaps in a specific mold with filter powder, followed by compaction, sintering, and other subsequent processes to form a filter element with a fixed shape and pore structure.

[0003] However, when existing powder filling equipment is used to prepare slender filter elements, the geometric center of the filter element blank will shift from its physical center due to the long path of the powder during the falling process, which is called eccentricity. During the subsequent sintering process, the eccentric filter element will have defects such as bending and cracking due to uneven stress distribution, which will seriously affect the filtration accuracy and structural strength, and may even lead to the direct scrapping of the product. Utility Model Content

[0004] The purpose of this invention is to provide a powder filling device that solves the problem that the filter blank is prone to eccentricity when the existing powder filling device is used to prepare slender filter elements.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a powder filling device, comprising: A base, wherein an outer tube and an inner tube are sequentially fitted on the upper end face of the base from the outside to the inside, a mold core is axially arranged in the inner cavity of the inner tube, a filling gap is formed between the inner tube and the mold core, the lower end of the mold core is fixed to the upper end face of the base, and a threaded rod is provided at the upper end of the mold core. A guiding assembly includes a guide ring, a drive ring, and a connecting rod. The guide ring is sleeved on the mold core and located within the filler gap. A material passage hole is longitudinally formed on the guide ring. The drive ring is rotatably sleeved on the threaded rod and located above the outer sleeve. The connecting rod longitudinally connects the guide ring and the drive ring.

[0006] In one possible implementation, a positioning frustum is fixed to the upper end face of the base, and the lower end of the inner tubing is interference-fitted onto the positioning frustum.

[0007] In one possible implementation, the upper end of the inner tubing has a flared feed port.

[0008] In one possible implementation, the inner hole of the guide ring is provided with a first sealing ring, and the outer circle of the guide ring is provided with a second sealing ring.

[0009] In one possible implementation, two connecting holes are symmetrically arranged on both sides of the upper end face of the guide ring, the lower ends of the two connecting rods are respectively connected to the two connecting holes, and the upper ends of the two connecting rods are vertically connected to the lower end face of the drive ring.

[0010] In one possible implementation, the guide ring has two axially symmetrical material passage holes, which are located on opposite sides of the connecting hole.

[0011] In one possible implementation, the material passage hole is an arc-shaped hole, with its center located on the axis of the mold core.

[0012] In one possible implementation, the inner tubing is interference-fitted into the outer tubing.

[0013] In one possible implementation, a limit block is provided at the upper end of the threaded rod.

[0014] In one possible implementation, rotating rods are symmetrically arranged on the outer wall of the drive ring.

[0015] The advantages of the powder filling device provided by this utility model are as follows: Compared with the prior art, the guide ring moves gradually upward along the mold core axis under the drive of the drive ring. Its outer ring fits against the inner wall of the inner tube and its inner ring matches the outer wall of the mold core, which can form a dynamic limit in the filling gap. When the device vibrates, the powder enters the filling area below through the material passage hole on the guide ring. The movement of the guide ring can initially compact the filled powder. At the same time, the vibration energy can be transmitted more evenly to each area of ​​the filling gap, reducing the local density unevenness caused by the difference in powder flowability. Compared with the traditional gravity filling or fixed area vibration method, this mode of moving, feeding and compacting at the same time can ensure that the filling density is consistent from the bottom to the top of the filter element, fundamentally reducing the risk of geometric center offset. The powder filling device provided by this utility model has a guide ring that moves upwards gradually from the bottom as the filling process progresses, always forming a closed feeding channel at the current filling height. The material passage ensures that the powder enters the filling area vertically, avoiding lateral deviation. At the same time, the threaded engagement between the threaded rod and the drive ring enables precise control of the guide ring's movement speed. Combined with the matching vibration frequency, it can ensure that the amount of powder and the degree of compaction are strictly consistent in each layer of filling. This layer-by-layer controllable filling method can effectively eliminate density differences in the depth direction, greatly improving the symmetry of the inner and outer walls of the filter element blank, thus solving the problem of eccentricity in slender filter elements. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the powder filling device provided by this utility model; Figure 2 A schematic diagram of the structure of the guide ring provided by this utility model; Figure 3 for Figure 2 Sectional view of AA; Figure 4 for Figure 2 A cross-sectional view of BB.

[0018] In the diagram: 1. Base; 2. Positioning frustum; 3. Outer tube; 4. Inner tube; 5. Mold core; 6. Filler gap; 7. Threaded rod; 8. Guide ring; 9. Drive ring; 10. Connecting rod; 11. Material passage hole; 12. Flared guide port; 13. Connecting hole; 14. Limiting block; 15. Rotating rod; 16. First sealing ring; 17. Second sealing ring. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] Unless otherwise explicitly specified, the use of terms such as "first," "second," or "third" is intended to distinguish different objects, not to describe a specific order.

[0021] Unless otherwise expressly defined, the use of directional terms such as “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “back,” “left,” “right,” “clockwise,” “counterclockwise,” “high,” and “low” to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of the present invention.

[0022] Please see Figures 1 to 4The powder filling device provided by this utility model will now be described. The powder filling device includes a base 1 and a guide assembly. An outer tube 3 and an inner tube 4 are sequentially fitted onto the upper end face of the base 1 from the outside to the inside. A mold core 5 is axially arranged in the inner cavity of the inner tube 4, and a filling gap 6 is formed between the inner tube 4 and the mold core 5. The lower end of the mold core 5 is fixed to the upper end face of the base 1, and a threaded rod 7 is provided at the upper end of the mold core 5. The guide assembly includes a guide ring 8, a drive ring 9, and a connecting rod 10. The guide ring 8 is fitted onto the mold core 5 and located within the filling gap 6. A material passage hole 11 is longitudinally opened on the guide ring 8. The drive ring 9 is rotatably fitted onto the threaded rod 7 and located above the outer tube 3. The connecting rod 10 longitudinally connects the guide ring 8 and the drive ring 9.

[0023] Compared with the prior art, the powder filling device provided by this utility model has a guide ring 8 that moves gradually upward along the axial direction of the mold core 5 under the drive of the drive ring 9. Its outer ring fits against the inner wall of the inner tube 4 and its inner ring is adapted to the outer wall of the mold core 5, which can form a dynamic limit within the filling gap 6. When the device vibrates, the powder enters the lower filling area through the material passage hole 11 on the guide ring 8. The movement of the guide ring 8 can initially compact the filled powder. At the same time, the vibration energy can be more evenly transmitted to each area of ​​the filling gap 6, reducing the local density unevenness caused by the difference in powder flowability. Compared with the traditional gravity filling or fixed area vibration method, this mode of moving, feeding and compacting at the same time can ensure that the filling density is consistent from the bottom to the top of the filter element, fundamentally reducing the risk of geometric center offset. The powder filling device provided by this utility model has a guide ring 8 that moves upwards gradually from the bottom as the filling process progresses, always forming a closed feeding channel at the current filling height. The material passage hole 11 ensures that the powder enters the filling area vertically and avoids lateral deviation. At the same time, the threaded engagement between the threaded rod 7 and the drive ring 9 enables precise control of the moving speed of the guide ring 8. With the matching of vibration frequency, it can ensure that the amount of powder and the degree of compaction of each layer are strictly consistent. This layer-by-layer controllable filling method can effectively eliminate the density difference in the depth direction, greatly improve the symmetry of the inner and outer walls of the filter element blank, and solve the problem of eccentricity of slender filter elements.

[0024] Please see Figure 1A positioning frustum 2 is fixed to the upper surface of the base 1, and the lower end of the inner tube 4 is interference-fitted onto the positioning frustum 2. The positioning frustum 2 provides a clear assembly reference for the inner tube 4. The interference fit allows the lower end of the inner tube 4 to fit tightly against the positioning frustum 2, effectively limiting the radial and circumferential displacement of the inner tube 4. This prevents it from tilting or shaking during filling due to vibration, powder impact, or other factors, ensuring that the filling gap 6 formed between the inner tube 4 and the mold core 5 remains uniform. This stable connection also reduces the vibration amplitude and irregular vibration of the inner tube 4, ensuring the stability of the filling gap 6. This keeps the guide ring 8 in a preset, precise position during movement and feeding, further ensuring the uniformity of powder filling and reducing the risk of eccentricity in the filter element blank.

[0025] Please see Figure 1 The upper end of the inner tube 4 is equipped with a flared feed port 12. The flared feed port 12 enlarges the feeding area at the upper end of the inner tube 4, providing a wider and more convenient channel for powder addition. This effectively reduces the probability of powder spillage when adding powder to the device, not only reducing material waste but also maintaining a clean working environment. Simultaneously, this flared design allows powder to flow more smoothly into the filler gap 6 between the inner tube 4 and the mold core 5, avoiding powder blockage caused by a narrow feed port and ensuring the continuity and efficiency of the filling process.

[0026] Please see Figures 2 to 4 The guide ring 8 has a first sealing ring 16 in its inner hole and a second sealing ring 17 on its outer circumference. The first and second sealing rings 16 and 17 are fitted into the guide ring 8. The guide ring 8 is made of wear-resistant materials such as polytetrafluoroethylene, nylon, or bronze. The first sealing ring 16 in the inner hole of the guide ring 8 is mainly used to seal the gap between the guide ring 8 and shaft parts, preventing leakage of internal media such as hydraulic oil and compressed air from the inner hole side and reducing friction and wear between the shaft and the guide ring 8. The second sealing ring 17 on the outer circumference is responsible for sealing the gap between the guide ring 8 and the cylinder or housing, preventing media leakage from the outer circumference side, and also assisting in guiding the guide ring 8 to prevent it from shifting during operation. It is worth noting that both the first and second sealing rings 16 and 17 are fitted into the guide ring 8, achieving a tight connection through grooves or interference fits, effectively preventing the sealing rings from falling off or shifting during operation, thus ensuring the stability of the sealing effect. This design integrates dual sealing and guiding functions, which not only significantly reduces the risk of media leakage but also simplifies the overall structure and significantly improves the durability and reliability of the components.

[0027] Please see Figure 2 and Figure 3Two connecting holes 13 are symmetrically arranged on both sides of the upper end face of the guide ring 8. The lower ends of two connecting rods 10 are respectively connected to the two connecting holes 13, and the upper ends of the two connecting rods 10 are vertically connected to the lower end face of the drive ring 9. Through the symmetrically distributed connecting holes 13 and connecting rods 10, the force between the guide ring 8 and the drive ring 9 can be more balanced, avoiding structural deformation or movement jamming caused by force offset during the driving process. At the same time, the vertical connection method ensures that the driving force can be stably transmitted along the axial direction, reducing force loss and improving the accuracy and stability of the overall component movement. It is especially suitable for mechanical systems that require the drive ring 9 to drive the guide ring 8 to perform synchronous reciprocating motion, such as the piston rod guide mechanism of hydraulic equipment, which can effectively ensure the coordination and reliability of component operation.

[0028] Please see Figure 2 and Figure 4 Two axially symmetrical material passage holes 11 are provided on the guide ring 8, located on either side of the connecting hole 13. The symmetrical arrangement of the material passage holes 11 ensures that materials (such as fluids, granular media, etc.) are subjected to balanced force during passage, preventing the guide ring 8 from being subjected to uneven loads due to unilateral feeding, thus preventing tilting or jamming during operation and ensuring overall operational stability. Simultaneously, the staggered positions of the material passage holes 11 and the connecting hole 13 do not interfere with the connection strength between the connecting rod 10 and the connecting hole 13, and allow the material conveying path and power transmission path to be independent and unaffected, achieving rational functional zoning. Furthermore, the axially oriented through-hole structure allows materials to flow smoothly along the axis of the guide ring 8, reducing conveying resistance and improving material transfer efficiency. This is particularly suitable for integrated mechanical systems that require simultaneous guiding, driving, and material conveying functions, such as material pushing mechanisms in some automated production lines or media circulation components in hydraulic equipment, further enhancing the synergy and practicality of equipment operation.

[0029] Please see Figure 2 The material passage hole 11 is an arc-shaped hole, with its center located on the axis of the mold core 5. The two symmetrically distributed arc-shaped material passage holes 11 form a symmetrical layout centered on the axis of the mold core 5, forming a coordinated force balance system with the connecting hole 13, connecting rod 10, and other structures on the guide ring 8. When the material passes through the arc-shaped channel, its impact force will be evenly distributed radially in the direction of the center, avoiding additional off-center load on the guide ring 8 due to the offset of the channel layout. This ensures that the overall structure maintains stable coaxiality when the drive ring 9 drives the guide ring 8, reducing vibration or jamming caused by uneven force.

[0030] Please see Figure 1The inner tubing 4 is interference-fitted inside the outer tubing 3, which generates continuous radial pressure through the elastic deformation of the material itself, thereby achieving a stable connection between the two and effectively preventing loosening, displacement, or relative slippage after assembly. At the same time, the interference fit significantly improves the sealing performance of the overall structure by utilizing the tight fit between the inner tubing 4 and the outer tubing 3.

[0031] Please see Figure 1 A limiting block 14 is provided at the upper end of the threaded rod 7. When the drive ring 9 moves upward along the axial direction of the threaded rod 7, it drives the guide ring 8 to move synchronously, gradually completing the filling of material in the packing gap 6. When the packing gap 6 is completely filled with material, the drive ring 9 just contacts the limiting block 14 at the upper end of the threaded rod 7. At this time, the limiting block 14 restricts the further upward movement of the drive ring 9 by physically blocking it, which accurately marks the node where the material filling is completed and avoids problems such as material overflow and structural overload caused by overfilling.

[0032] Please see Figure 1 The outer wall of the drive ring 9 is symmetrically equipped with rotating rods 15. When the guide ring 8 needs to be driven to rise gradually, the operator can hold the symmetrically distributed rotating rods 15 and apply rotational force to drive the drive ring 9 to rotate. Since there is a threaded fit between the drive ring 9 and the threaded rod 7, the rotational motion of the drive ring 9 will be converted into an upward motion along the axial direction of the threaded rod 7, which will then drive the guide ring 8 to rise synchronously and gradually through the transmission of the connecting rod 10. The symmetrically distributed rotating rods 15 enable the operator to apply force more evenly, avoid the drive ring 9 from deflecting or jamming during rotation, and ensure the smoothness of the guide ring 8's rising process. At the same time, the manual operation method allows for flexible control of the rising rhythm of the guide ring 8 according to the actual working conditions and precise adjustment of the movement process, which is especially suitable for mechanical operation scenarios that require manual monitoring and fine-tuning.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A powder filling device, characterized in that, include: A base (1) is provided with an outer tube (3) and an inner tube (4) sequentially fitted on the upper surface of the base (1) from the outside to the inside. A mold core (5) is axially arranged in the inner cavity of the inner tube (4). A filling gap (6) is formed between the inner tube (4) and the mold core (5). The lower end of the mold core (5) is fixed to the upper surface of the base (1). A threaded rod (7) is provided on the upper end of the mold core (5). The guide assembly includes a guide ring (8), a drive ring (9), and a connecting rod (10). The guide ring (8) is sleeved on the mold core (5) and located in the filler gap (6). A through hole (11) is longitudinally opened on the guide ring (8). The drive ring (9) is rotatably sleeved on the threaded rod (7) and located above the outer sleeve (3). The connecting rod (10) longitudinally connects the guide ring (8) and the drive ring (9).

2. The powder filling apparatus as described in claim 1, characterized in that, The upper end face of the base (1) is fixed with a positioning frustum (2), and the lower end of the inner tube (4) is interference-fitted onto the positioning frustum (2).

3. The powder filling device as described in claim 1, characterized in that, The upper end of the inner tube (4) is provided with a flared guide port (12).

4. The powder filling apparatus as described in claim 1, characterized in that, The inner hole of the guide ring (8) is provided with a first sealing ring (16), and the outer circle of the guide ring (8) is provided with a second sealing ring (17).

5. The powder filling apparatus as described in claim 1, characterized in that, The guide ring (8) has two symmetrical connecting holes (13) on both sides of its upper end face. The lower ends of the two connecting rods (10) are respectively connected to the two connecting holes (13), and the upper ends of the two connecting rods (10) are vertically connected to the lower end face of the drive ring (9).

6. The powder filling apparatus as described in claim 5, characterized in that, The guide ring (8) has two material passage holes (11) symmetrically arranged on the axial direction, and the two material passage holes (11) are located on both sides of the connecting hole (13).

7. The powder filling apparatus as described in claim 6, characterized in that, The material passage hole (11) is an arc-shaped hole, and the center of the circle is located on the axis of the mold core (5).

8. The powder filling apparatus as described in claim 1, characterized in that, The inner tube (4) is press-fitted into the inside of the outer tube (3).

9. The powder filling apparatus as described in claim 1, characterized in that, A limit block (14) is provided at the upper end of the threaded rod (7).

10. The powder filling apparatus as described in claim 1, characterized in that, Rotating rods (15) are symmetrically arranged on the outer wall of the drive ring (9).

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