A double cone granulator with an oil seal and oil-blocking structure

Abstract

This utility model relates to the field of granulation equipment technology, and in particular to a double-cone granulator with an oil seal and oil-blocking structure. The double-cone granulator of this utility model features a hollow partition between the hopper sidewall and the oil seal structure. This hollow partition provides a double oil-blocking effect, effectively preventing lubricating oil leaking from the oil seal structure from directly seeping into the hopper, reducing the risk of material spoilage due to lubricating oil contamination. The oil-collecting structure at the bottom of the partition collects lubricating oil leaking from the oil seal structure, preventing lubricating oil accumulation in equipment gaps that could lead to corrosion and environmental pollution. A sealing ring further enhances the sealing between the stirring screw, the partition, and the oil seal structure, reducing the risk of leakage. The overall structural design is simple and can significantly improve the operational reliability and product quality of the granulator.

Description

Technical Field

[0001] This utility model relates to the field of granulation equipment technology, and in particular to a double cone granulator with an oil seal and oil blocking structure. Background Technology

[0002] Double cone granulators are widely used in chemical, pharmaceutical, and food industries. They use a mixing screw inside the hopper to mix, plasticize, and extrude materials into granules. To ensure smooth rotation of the mixing screw, oil seals are typically installed at the connections between the screw ends and the hopper sidewalls for sealing and lubrication.

[0003] However, the existing oil seal structure of the double cone granulator has the following problems: During long-term use, the lubricating oil in the oil seal is prone to leakage due to screw rotation wear. The leaked lubricating oil may seep into the hopper along the screw, contaminating the material and affecting product quality. In addition, if the leaked lubricating oil accumulates in the equipment gaps, it can also lead to equipment corrosion and shorten its service life.

[0004] For example, patent CN202420936420.X discloses a high-sealing oscillating granulator. Although it uses a skeleton oil seal for sealing, it lacks a dedicated oil-blocking and oil-collecting structure, failing to solve the problem of lubricating oil leakage contaminating materials. Therefore, a double-cone granulator with an oil-sealing and oil-blocking structure is needed. Through optimized structural design, it can effectively block and collect leaked lubricating oil, preventing material contamination. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a double-cone granulator with an oil-sealing structure, including a granulator body with a hopper on it. A pair of cooperating stirring screws are provided at the bottom of the hopper. Oil seal structures are provided on the outer side walls of the opposite sides of the hopper. A partition is provided between the side wall of the hopper and the oil seal structure. The partition is hollow. Both ends of the pair of stirring screws pass through the side wall of the hopper and the partition in sequence and are rotatably mounted on the corresponding oil seal structure. An oil receiving structure is provided at the bottom of the partition, and the oil receiving structure is connected to the internal space of the partition.

[0006] In some possible embodiments, the oil receiving structure includes an oil receiving box, and the bottom of the partition is provided with an oil outlet hole, which communicates with the oil receiving box.

[0007] In some possible embodiments, an oil guide column is provided at the lower end of the oil outlet, and the oil guide column extends into the oil receiving box.

[0008] In some possible embodiments, the opening of the oil receiving box is provided with a connecting lug, which is connected to a connecting block on the outer wall of the partition.

[0009] In some possible embodiments, the opening of the oil receiving box is provided with an outer step, and the bottom of the partition is provided with an inner step that cooperates with the outer step.

[0010] In some possible embodiments, the oil receiving structure includes an oil receiving box, the bottom of the partition is open, and an oil-drawing tip is provided on the bottom of the side wall through which the stirring screw passes, and the oil receiving box is capable of receiving the lubricating oil dripping from the oil-drawing tip.

[0011] In some possible embodiments, all the stirring screws are fitted with sealing rings in the area between the partition and the oil seal structure, and between the partition and the side wall of the hopper, with the two sides of the sealing rings abutting against the outer side wall of the oil seal structure and the hopper, respectively.

[0012] In some possible embodiments, the partition plate is provided with a perforation for the stirring screw to pass through, and the inner side of the partition plate is provided with a ring platform on the periphery of the perforation.

[0013] In some possible embodiments, mounting edges are provided on both sides of the partition, and mounting holes are provided on the mounting edges. The partition and the oil seal structure are sequentially fixed to the outer wall of the hopper by screws passing through the mounting holes.

[0014] Compared to existing technologies, the advantages of this invention are as follows: By incorporating a hollow partition between the hopper sidewall and the oil seal structure, the partition achieves a double oil-blocking effect, effectively preventing leaked lubricating oil from the oil seal structure from directly seeping into the hopper, thus reducing the risk of material spoilage due to lubricating oil contamination. The oil-collecting structure at the bottom of the partition collects leaked lubricating oil from the oil seal structure, preventing lubricating oil accumulation in equipment gaps that could lead to corrosion and environmental pollution. The sealing ring further enhances the sealing between the stirring screw, the partition, and the oil seal structure, reducing the risk of leakage. The overall structural design is simple and can significantly improve the operational reliability and product quality of the granulator. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0016] Figure 1 Schematic diagram of the structure of the double cone granulator provided in the embodiment of this utility model Figure 1 ;

[0017] Figure 2 Schematic diagram of the structure of the double cone granulator provided in the embodiment of this utility model Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the oil seal oil-blocking structure provided in an embodiment of the present utility model;

[0019] Figure 4 A cross-sectional view of the oil seal oil-blocking structure provided in the embodiment of this utility model. Figure 1 ;

[0020] Figure 5 A cross-sectional view of the oil seal oil-blocking structure provided in the embodiment of this utility model. Figure 2 .

[0021] Reference numerals: granulator body 10, hopper 11, stirring screw 12, oil seal structure 20, partition plate 30, oil outlet 31, oil inlet column 32, connecting block 33, inner step 34, oil inlet tip 35, perforation 36, ring platform 37, oil receiving structure 40, oil receiving box 41, connecting ear 42, outer step 43, sealing spacer 50. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1 to 5 A double-cone granulator with an oil seal and oil blocking structure includes a granulator body 10, an oil seal structure 20, a partition plate 30, and an oil receiving structure 40. A pair of mating stirring screws 12 are rotatably mounted at the bottom of the hopper 11 of the granulator body 10 for mixing materials and extruding granules. The oil seal structure 20 is installed on the outer side walls on opposite sides of the hopper 11 to provide sealing and lubrication for the ends of the stirring screws 12. The partition plate 30 is located between the side wall of the hopper 11 and the oil seal structure 20 and has a hollow design to block leaked lubricating oil. The oil receiving structure 40 is located at the bottom of the partition plate 30 to collect leaked lubricating oil.

[0024] Specifically, the two ends of the stirring screw 12 are rotatably connected to the side wall of the hopper 11 via bearings. Its end passes through the side wall of the hopper 11 and engages with the oil seal structure 20. The oil seal structure 20 can be a conventional oil seal structure, such as the structure in the external circulation oil seal structure of a granulator disclosed in utility model patent CN202322268616.4. It is fitted onto the end of the stirring screw 12 and fixed to the outer side wall of the hopper 11. The partition 30 is a hollow cavity structure formed by bending a metal plate. It is fitted onto the outside of the stirring screw 12, with its inner side fitting against the outer side wall of the hopper 11 and its outer side fitting against the oil seal structure 20, forming a barrier to block lubricating oil.

[0025] This structure isolates the oil seal structure 20 from the inside of the hopper 11 through the partition 30. Even if lubricating oil leaks from the oil seal structure 20, it will be blocked by the partition 30 and collected in the oil receiving structure 40, thus preventing it from entering the hopper 11 and contaminating the material.

[0026] Reference Figure 4 As shown, the oil receiving structure 40 includes an oil receiving box 41, and an oil outlet hole 31 is provided at the bottom of the partition 30, which communicates with the oil receiving box 41. Leaked lubricating oil flows in the hollow cavity inside the partition 30 and flows into the oil receiving box 41 through the oil outlet hole 31 for collection. Regular cleaning by personnel is then possible. The oil outlet hole 31 can be configured as a downward-sloping through-hole, forming a funnel shape, to facilitate smooth flow of lubricating oil.

[0027] Reference Figure 4 As shown, an oil guide column 32 is provided at the lower end of the oil outlet 31. The oil guide column 32 is a tubular structure, and its lower end extends into the oil receiving box 41. The oil guide column 32 can prevent lubricating oil from splashing out of the oil receiving box 41 when it flows out of the oil outlet 31, thereby improving the collection efficiency. It also prevents lubricating oil from flowing out of the oil outlet 31 and leaking outward along the bottom side wall of the partition 30.

[0028] To facilitate the installation and fixation of the oil collection box 41, a connecting lug 42 is provided on the opening edge of the oil collection box 41. The connecting lug 42 is fixedly connected to the connecting block 33 on the outer wall of the partition 30 by screws. This detachable connection method facilitates the installation, disassembly and cleaning of the oil collection box 41.

[0029] Reference Figure 4 and Figure 5 As shown, the opening of the oil receiving box 41 is provided with an outer step 43, and the bottom of the partition 30 is provided with an inner step 34 that cooperates with the outer step 43. The positioning and installation of the oil receiving box 41 and the partition 30 are achieved through the step cooperation, while enhancing the sealing of the connection between the two and preventing lubricating oil from leaking from the gap.

[0030] Reference Figure 5As shown, the bottom of the partition 30 is fully open to facilitate its processing. To accommodate this design, the oil collection box 41 is directly attached to the opening at the bottom of the partition 30. An oil-drawing tip 35 is provided at the lower end of the side wall through which the stirring screw 12 passes. The oil-drawing tip 35 has a downward-sloping pointed structure. Leaked lubricating oil flows along the inner wall of the partition 30 to the oil-drawing tip 35 and drips into the oil collection box 41, suitable for scenarios with minimal lubricating oil leakage.

[0031] Reference Figure 4 and Figure 5 As shown, to further enhance sealing and prevent lubricating oil leakage between the partition 30 and the oil seal structure 20, and between the partition 30 and the outer wall of the hopper 11, sealing spacers 50 are fitted on all stirring screws 12 in the areas between the partition 30 and the oil seal structure 20, and between the partition 30 and the side wall of the hopper 11. The sealing spacers 50 can be made of rubber or polytetrafluoroethylene, and their two sides abut against the oil seal structure 20 and the outer wall of the hopper 11, respectively. The sealing spacers 50 fill the gap between the stirring screws 12 and the partition 30, further preventing lubricating oil leakage into the hollow cavity of the partition 30 and enhancing overall sealing.

[0032] Reference Figure 4 and Figure 5 As shown, the partition plate 30 has a through hole 36 for the stirring screw 12 to pass through. The diameter of the through hole 36 is slightly larger than the diameter of the stirring screw 12 to avoid affecting the rotation of the stirring screw 12. An annular platform 37 is provided on the inner side of the partition plate 30 around the through hole 36. The annular platform 37 is a ring-shaped protrusion, and a sealing ring can be installed on the inner ring of the annular platform 37 to further prevent lubricating oil from flowing from the gap between the through hole 36 and the stirring screw 12 towards the hopper 11, enhancing the oil-blocking effect. At the same time, the annular platform 37 can increase the contact area between the partition plate 30 and the stirring screw 12, facilitating sealing.

[0033] Furthermore, mounting edges are provided on both sides of the partition plate 30, and mounting holes on the mounting edges are used to insert screws. The screws fix the partition plate 30 and the oil seal structure 20 to the outer side wall of the hopper 11 in sequence, ensuring that the three are firmly connected and avoiding the increase in gap due to equipment vibration, which would aggravate oil leakage.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A double-cone granulator having an oil seal oil blocking structure, comprising a granulator body (10) on which a hopper (11) is provided, the bottom of the hopper (11) being provided with a pair of interworking stirring screws (12), characterized in that, Oil seal structures (20) are provided on the outer side walls of the hopper (11) on both sides. A partition (30) is provided between the side wall of the hopper (11) and the oil seal structure (20). The partition (30) is hollow. Both ends of a pair of stirring screws (12) pass through the side wall of the hopper (11) and the partition (30) in sequence and are rotatably mounted on the corresponding oil seal structure (20). An oil receiving structure (40) is provided at the bottom of the partition (30). The oil receiving structure (40) connects to the internal space of the partition (30).

2. The double-cone granulator with an oil seal oil blocking structure according to claim 1, characterized in that, The oil receiving structure (40) includes an oil receiving box (41), and the bottom of the partition (30) is provided with an oil outlet hole (31), which is connected to the oil receiving box (41).

3. The double-cone granulator with an oil seal oil blocking structure according to claim 2, characterized in that, An oil guide column (32) is provided at the lower end of the oil outlet (31), and the oil guide column (32) extends into the oil receiving box (41).

4. The double-cone granulator with oil seal oil blocking structure according to claim 2, characterized in that, The oil receiving box (41) has a connecting ear (42) on its opening, and the connecting ear (42) is connected to the connecting block (33) on the outer wall of the partition (30).

5. The double-cone granulator with oil seal oil blocking structure according to claim 2, characterized in that, The opening of the oil receiving box (41) is provided with an outer step (43), and the bottom of the partition (30) is provided with an inner step (34) that cooperates with the outer step (43).

6. The double-cone granulator with oil seal oil blocking structure according to claim 1, characterized in that, The oil receiving structure (40) includes an oil receiving box (41). The bottom of the partition (30) is designed to be open. An oil-leading tip (35) is provided at the lower end of the side wall through which the stirring screw (12) passes. The oil receiving box (41) can receive the lubricating oil dripping from the oil-leading tip (35).

7. A double-cone granulator with an oil-sealing and oil-blocking structure according to claim 1, characterized in that, All the stirring screws (12) are fitted with sealing rings (50) in the area between the partition (30) and the oil seal structure (20) and between the partition (30) and the side wall of the hopper (11). The two sides of the sealing rings (50) are respectively pressed against the outer side wall of the oil seal structure (20) and the hopper (11).

8. A double-cone granulator with an oil-sealing and oil-blocking structure according to claim 1, characterized in that, The partition (30) is provided with a through hole (36) for the stirring screw (12) to pass through, and a ring platform (37) is provided on the inner side of the partition (30) on the periphery of the through hole (36).

9. A double-cone granulator with an oil-sealing and oil-blocking structure according to claim 1, characterized in that, The partition (30) has mounting edges on both sides, and mounting holes are provided on the mounting edges. The partition (30) and the oil seal structure (20) are fixed to the outer wall of the hopper (11) by means of screws passing through the mounting holes.

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