Moisture-proof adsorption filter screen cover for powder filling head

Abstract

The utility model discloses a powder filling head moisture-proof adsorption filter screen cover which comprises a mounting base fixedly arranged on a filling head pipe sleeve, the mounting base comprises a top plate and a base, a plurality of airflow channels are formed in the base in the circumferential direction, a channel opening is formed in the lower portion of the base, and a plurality of ventilation modules matched with the airflow channels are arranged between the top plate and the base. The ventilation module is provided with an air inlet and an air outlet, the lower air outlet is aligned with the airflow channel and inserted above the base, and the top plate fixes the position of the top end of the ventilation module through a fastener. The mounting base is additionally arranged at the lower end of the powder filling head, a plurality of ventilation modules are arranged to achieve local active dehumidification, the conical groove structure and the synchronous rotating scraper design are combined, powder can be effectively prevented from being adhered and agglomerated at the filling head due to damp, the shutdown frequency caused by blockage in the filling process is remarkably reduced, and the production efficiency is improved. And continuous and stable production of the filling equipment is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of powder filling equipment, specifically to a moisture-proof adsorption filter cover for a powder filling head. Background Technology

[0002] Powder filling machines, as important material dispensing equipment, are widely used in the pharmaceutical, food, and chemical industries to quantitatively fill various powdered materials (such as pharmaceutical powder, milk powder, seasonings, additives, etc.) according to a set weight or volume. Common types of existing powder filling mechanisms include screw filling, vacuum filling, and gravity filling. Among these, the filling head, as a key component for material output, directly affects filling accuracy and production efficiency.

[0003] However, in practical applications, environmental factors such as high humidity and dust in the workshop cause powder to stick and clump at the filling head during transport. This not only reduces filling accuracy and leads to metering errors, but also causes material retention, microbial growth, and ultimately affects the taste and shelf life of food powder products (such as mold growth). Once blockage or sticking occurs, it usually requires stopping the machine for disassembly and cleaning. The cleaning process is cumbersome and the downtime is long, which greatly affects the continuity of production and overall efficiency.

[0004] Therefore, there is an urgent need to design a moisture-proof adsorption filter cover for powder filling heads to meet the needs of modern production and processing. Utility Model Content

[0005] The purpose of this utility model is to provide a moisture-proof adsorption filter cover for powder filling heads. This moisture-proof adsorption filter cover can perform local active dehumidification and protection of the filling head, effectively preventing powder from sticking and clumping due to moisture at the filling head, reducing the frequency of equipment shutdown for cleaning due to blockage, thereby improving the continuity and stability of filling production, and enhancing the quality and shelf life of powder products.

[0006] The technical solution adopted by this utility model to solve the above problems is: a moisture-proof adsorption filter cover for a powder filling head, including a mounting base fixedly set on the filling head tube sleeve. The mounting base includes a top plate and a base. The base has several airflow channels circumferentially opened, and a channel opening is provided at the bottom of the base. Several ventilation modules adapted to the airflow channels are set between the top plate and the base. The ventilation modules are provided with air inlets and air outlets. The lower air outlet is aligned with the airflow channel and inserted into the top of the base. The top plate is fixed in position to the top of the ventilation module by fasteners.

[0007] Preferably, the base has a tapered groove at its lower end, and the channel opening is located on the tapered groove.

[0008] Preferably, it also includes a scraper rotatably disposed below the base, the scraper being adapted to the inclined surface of the conical groove, and the scraper being fixed to the bottom end of the filling head guide screw by a connecting sleeve and fixing bolts.

[0009] Preferably, the connecting sleeve slides up and down relative to the guide screw without rotating, the connecting sleeve has a slot, the bottom end of the guide screw is provided with a plug that is compatible with the slot, the fixing bolt is fitted with a spring, and the bottom of the connecting sleeve is provided with a groove for placing the spring, the upper and lower ends of the spring are pressed and fitted against the groove end face of the connecting sleeve and the head end face of the fixing bolt, respectively.

[0010] Preferably, the ventilation module includes a housing, an air inlet is vertically disposed above the side of the housing, and an air inlet mesh plate, a fan and a filter assembly are sequentially disposed along the air inlet to the air outlet of the housing.

[0011] Preferably, the filter assembly comprises, from top to bottom, a filter cotton layer, a spacer mesh, and an adsorption layer.

[0012] Preferably, the top plate has a threaded hole, the fastener is a limiting bolt that is compatible with the threaded hole, and an arc-shaped limiting plate is provided on the top of the housing. After the limiting bolt is screwed into the threaded hole, its end is stuck into the concave side of the limiting plate.

[0013] Preferably, the magnetic connection adapter for the air inlet is equipped with a dust cover.

[0014] Compared with the prior art, this utility model has the following advantages and effects:

[0015] This invention achieves localized active dehumidification by adding a mounting base at the lower end of the powder filling head and incorporating several ventilation modules. Combined with a conical groove structure and a synchronously rotating scraper design, it effectively prevents powder from sticking and clumping at the filling head due to moisture, significantly reducing downtime caused by blockages during filling and ensuring continuous and stable production of the filling equipment. The ventilation modules employ a multi-group distributed layout, forming a uniform air curtain around the filling head, fully covering the filling outlet area and further enhancing the dehumidification and drying effect. Simultaneously, the ventilation modules have built-in filter components and adsorption layers, effectively filtering out fine dust and moisture from the air, ensuring airflow cleanliness. The scraper is connected to an elastic mechanism via a connecting sleeve, adapting to gap changes caused by scraper wear and maintaining a good fit with the conical groove's inclined surface, ensuring stable and reliable cleaning results and preventing residual materials from becoming damp and deteriorating. This invention features a compact overall structure, convenient installation, easy subsequent maintenance and cleaning, and strong adaptability, making it widely applicable to various powder filling equipment, particularly suitable for industries with high hygiene and precision requirements such as pharmaceuticals and food. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of a moisture-proof adsorption filter cover for a powder filling head according to an embodiment of this utility model.

[0017] Figure 2 This is a cross-sectional view of a moisture-proof adsorption filter cover for a powder filling head according to an embodiment of this utility model.

[0018] Figure 3 This is a partial structural schematic diagram of a moisture-proof adsorption filter cover for a powder filling head according to an embodiment of this utility model.

[0019] Figure 4 yes Figure 2 Enlarged diagram of the structure marked with a circle.

[0020] Figure 5 This is a schematic diagram of the connection structure between the scraper and the guide screw in an embodiment of this utility model.

[0021] Attached Figures: 11. Sleeve 12. Mounting Base 13. Top Plate 14. Base 14. Airflow Channel 15. Channel Opening 16. Ventilation Module 21. Air Inlet 22. Air Outlet 23. Fastener 24. Ring 25. Clamp 26. Material Box 27. Threaded Hole 28. Arc-shaped Limiting Plate 29. Conical Groove 31. Scraper 32. Connecting Sleeve 33. Fixing Bolt 34. Guide Screw 35. Slot 36. Insert Block 37. Spring 38. Groove 39. Housing 41. Air Inlet Mesh Plate 42. Fan 43. Filter Assembly 44. Filter Cotton Layer 45. Spacer Mesh Plate 46. Adsorption Layer 47. Dust Cover 48. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0023] Example: See Figure 1 - Figure 5 This embodiment relates to a moisture-proof adsorption filter cover for a powder filling head, specifically used in the filling head of a screw-type powder filling machine. It provides localized active dehumidification and protection for the filling head, eliminating the problems of moisture-induced blockage and frequent machine shutdowns for cleaning inherent in existing technologies. Specifically, it includes a mounting base 12 fixedly mounted on the filling head sleeve 11. The mounting base 12 includes a top plate 13 and a base 14. The base 14 has several airflow channels 15 circumferentially arranged, and a channel opening 16 is provided below the base 14. Several ventilation modules 21 adapted to the airflow channels 15 are arranged between the top plate 13 and the base 14. Each ventilation module 21 has an air inlet 22 and an air outlet 23. The lower air outlet 23 is aligned with the airflow channel 15 and inserted into the upper part of the base 14. The top plate 13 is fixed in position to the top of the ventilation module 21 by fasteners 24.

[0024] Specifically, in this embodiment, each component needs to be installed:

[0025] Fixing the mounting base 12: The base 14 is fixedly set on the outer side of the lower end of the filling head sleeve 11, and the top plate 13 is connected and fixed to the material box 27 above the filling head through the ring 25 and the clamp 26.

[0026] Install the ventilation module 21: Align the air outlet 23 at the bottom of the ventilation module 21 with the airflow channel 15 above the base 14 and insert it. Then push the top of the ventilation module 21 in so that it contacts the filling head sleeve 11. Finally, fix the position of the top of the ventilation module 21 with the fastener 24.

[0027] After the above components are installed, the ventilation module 21 is activated, continuously drawing air in through the air inlet 22 and blowing it out through the air outlet 23, directing it towards the lower end of the filling head to maintain its dryness and reduce the probability of powder sticking or clumping at the lower end of the filling head. In this embodiment, four ventilation modules 21 are provided, arranged equidistantly at 90° intervals around the filling head. When all four ventilation modules 21 operate simultaneously, they form a dry air curtain around the filling head, achieving comprehensive coverage and dry protection for the lower end of the filling head. To avoid overheating of the ventilation modules 21, the four ventilation modules 21 can also operate alternately.

[0028] See Figure 3 In this embodiment, the top plate 13 is provided with a threaded hole 28, and the fastener 24 is a limiting bolt adapted to the threaded hole 28. An arc-shaped limiting plate 29 is provided on the top of the housing 41. After the limiting bolt is screwed into the threaded hole 28, its end is locked into the concave side of the limiting plate. This effectively prevents the ventilation module 21 from coming out during use.

[0029] See Figure 4 and Figure 5The base 14 has a conical groove 31 at its lower end, and a channel opening 16 is provided on the conical groove 31. The conical groove 31 is in the shape of an inverted cone, with its opening facing downwards. Its inner wall is inclined at approximately 30°-60° to the horizontal plane, and a channel opening 16 is provided on the side of the inner wall of the base 14, which expands the outlet of the filling head and facilitates powder discharge. In this embodiment, the air inlet 22 and air outlet 23 of the ventilation module 21 can be inverted. At this time, the air inlet 22 of the ventilation module 21 is connected to the airflow channel 15 to draw in the gas inside the filling head. The inverted ventilation module 21 and the non-inverted ventilation module 21 are used in pairs to allow the airflow that absorbs moisture at the filling head to be extracted, realizing airflow circulation to further reduce the humidity at the filling head. The design of the conical groove 31 can confine the circulating airflow within the conical groove 31, which helps to keep the outlet of the filling head dry. Furthermore, the powder is lightweight and easily adheres to the conical groove 31 due to static electricity. This adhered powder may become damp after prolonged exposure, thus requiring timely cleaning. This invention also includes a scraper 32 rotatably mounted below the base 14. The scraper 32 is adapted to the inclined surface of the conical groove 31 and is fixed to the bottom end of the filling head guide screw 35 via a connecting sleeve 33 and fixing bolts 34. The scraper 32 rotates synchronously with the guide screw 35, allowing it to slide smoothly along the inclined surface of the conical groove 31 and thoroughly scrape off the adhered powder.

[0030] In this embodiment, the scraper 32 is made of food-grade plastic (silicone, rubber) and has anti-static properties, preventing the scraped powder from sticking back together. However, the scraper 32 is prone to wear during use. After wear, the contact stability between the scraper 32 and the conical groove 31 is poor, affecting the cleaning effect. Therefore, local structural optimization and improvement are required. In this embodiment, the connecting sleeve 33 slides up and down relative to the guide screw 35 without rotating. The connecting sleeve 33 has a slot 36. The bottom end of the guide screw 35 is provided with a plug block 37 that is compatible with the slot 36. The fixing bolt 34 is fitted with a spring 38, and the bottom of the connecting sleeve 33 is provided with a groove 39 for placing the spring 38. The upper and lower ends of the spring 38 are pressed and fitted against the end face of the groove 39 of the connecting sleeve 33 and the head end face of the fixing bolt 34, respectively. When the feed screw 35 rotates, driving the scraper 32 to rotate, the spring 38 provides a continuous upward elastic thrust to the connecting sleeve 33 and the scraper 32, ensuring that the scraper 32 always adheres to the inner wall of the conical groove 31. Even if the scraper 32 wears or the conical groove 31 is slightly deformed, it can maintain good contact and scraping effect, effectively preventing powder residue from accumulating in the conical groove 31 and further avoiding moisture and clumping. In addition, the compression of the spring 38 can be changed by tightening the fixing bolt 34 to adjust the squeezing force between the scraper 32 and the conical groove 31. Specifically: increasing the compression of the spring 38 ensures that the scraper 32 can still maintain a tight fit with the inclined surface of the conical groove 31 after wear, which is suitable for cleaning powders with high adhesion and easy clumping; decreasing the compression of the spring 38 reduces the squeezing force, which is suitable for powders with good flowability and less wear, saving driving energy and extending the service life of the scraper 32.

[0031] The ventilation module 21 includes a housing 41, with an air inlet 22 vertically positioned above the side of the housing 41. An air inlet mesh 42, a fan 43, and a filter assembly 44 are sequentially arranged along the air inlet 22 to the air outlet 23 on the housing 41. The filter assembly 44, from top to bottom, includes a filter cotton layer 455, a spacer mesh 46, and an adsorption layer 47. The filter cotton layer 455 can be made of meltblown polypropylene (PP) nonwoven fabric or biochemical cotton to block fine particulate matter in the air. The adsorption layer 47 can be made of materials with good moisture absorption properties, such as silica gel particles or molecular sieve materials, to continuously adsorb moisture entering the ventilation module 21, ensuring that the airflow discharged to the filling head is dry gas (relative humidity should be stably maintained at ≤40%). Furthermore, external compressed air and a solenoid valve can be used to switch between forward and reverse blowing to replace the forward and reverse rotation of the fan 43, achieving a better dehumidification effect.

[0032] The air inlet 22 is magnetically connected to a dust cover 48. When some ventilation modules 21 are not in use, the dust cover 48 can be used to seal them, isolating their interior from the external environment and preventing long-term openness from causing contamination or unnecessary consumption of the internal filter components 44. In addition, the dust cover 48 and the fan 43 (if any) can be removed to replace the filter components 44.

[0033] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A moisture-proof adsorption filter cover for a powder filling head, characterized in that, The device includes a mounting base that is fixedly installed on the filling head tube sleeve. The mounting base includes a top plate and a base. The base has several airflow channels circumferentially opened, and a channel opening is provided at the bottom of the base. Several ventilation modules adapted to the airflow channels are provided between the top plate and the base. The ventilation modules are provided with air inlets and air outlets. The lower air outlet is aligned with the airflow channel and inserted into the top of the base. The top plate is fixed in position to the top of the ventilation module by fasteners.

2. The moisture-proof adsorption filter screen cover for a powder filling head according to claim 1, characterized in that: The base has a tapered groove at its lower end, and the channel opening is located on the tapered groove.

3. The moisture-proof adsorption filter cover for a powder filling head according to claim 2, characterized in that: It also includes a scraper that is rotatably mounted below the base. The scraper is adapted to the inclined surface of the conical groove and is fixed to the bottom end of the filling head guide screw by a connecting sleeve and fixing bolts.

4. The moisture-proof adsorption filter screen cover for a powder filling head according to claim 3, characterized in that: The connecting sleeve slides up and down relative to the guide screw without rotating. The connecting sleeve has a slot. The bottom end of the guide screw is provided with a plug that is compatible with the slot. The fixing bolt is fitted with a spring. The bottom of the connecting sleeve is provided with a groove for placing the spring. The upper and lower ends of the spring are pressed and fitted against the groove end face of the connecting sleeve and the head end face of the fixing bolt, respectively.

5. The moisture-proof adsorption filter screen cover for a powder filling head according to claim 1, characterized in that: The ventilation module includes a housing, an air inlet is vertically disposed on the upper side of the housing, and an air inlet mesh, a fan and a filter assembly are sequentially arranged along the air inlet to the air outlet of the housing.

6. The moisture-proof adsorption filter screen cover for a powder filling head according to claim 5, characterized in that: The filter assembly comprises, from top to bottom, a filter cotton layer, a spacer mesh, and an adsorption layer.

7. The moisture-proof adsorption filter screen cover for a powder filling head according to claim 1, characterized in that: The top plate has a threaded hole, and the fastener is a limiting bolt that is compatible with the threaded hole. An arc-shaped limiting plate is provided on the top of the housing. After the limiting bolt is screwed into the threaded hole, its end is stuck into the concave side of the limiting plate.

8. The moisture-proof adsorption filter screen cover for a powder filling head according to claim 1, characterized in that: The air inlet connection adapter is equipped with a dust cover.

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