A ring die pellet mill

Abstract

This utility model relates to the technical field of biomass production and proposes a ring die pellet mill, including a processing box. A ring die is fixed inside the processing box, and a feed hopper is connected to the top of the processing box. A drying mechanism is located at the feed hopper. The drying mechanism includes a spiral plate that spirals downwards from the feed hopper inlet to the ring die feed inlet and is fixed to the ring die. Multiple sets of heating wires are fixed inside the spiral plate, and several raised pellets are evenly fixed on the top of the spiral plate. The beneficial effects of this utility model are: the spiral structure of the spiral plate guides the material to move slowly from top to bottom; the heating wires generate heat when energized, which is transferred to the material through the heat-conducting spiral plate, reducing the material's moisture content and preventing excessive moisture from clogging the die.

Description

Technical Field

[0001] This utility model relates to the technical field of biomass production, specifically to a ring die pellet mill. Background Technology

[0002] Ring die pellet mills are key equipment in biomass energy processing and feed production. During processing, the moisture content of biomass materials (such as sawdust and straw) has a significant impact on pellet forming quality. Excessive moisture content in biomass materials can easily lead to blockage of the ring die orifice and loose, easily broken pellets. Therefore, in actual production, the materials need to be dried by external drying equipment before being fed into the ring die pellet mill. This not only increases the floor space and equipment cost of the production line, but may also cause the drying effect to be unstable due to secondary moisture absorption during material transfer, thus affecting the subsequent pellet forming quality. Utility Model Content

[0003] This invention proposes a ring die pellet mill, in which the spiral structure of the rotating plate guides the material to move slowly from top to bottom. The heating wire generates heat when energized, which is transferred to the material through the heat-conducting rotating plate, thereby reducing the material's moisture content and preventing excessive moisture from causing die blockage.

[0004] Therefore, the technical solution adopted is as follows: A ring die pellet mill includes a processing chamber, inside which a ring die is fixed. The top of the processing chamber is connected to a feed hopper, and the feed hopper has a drying mechanism. The drying mechanism includes a rotating plate that spirals downward from the feed hopper inlet to the ring die feed inlet and is fixed to the ring die. Multiple sets of heating wires are fixed inside the rotating plate, and several protruding pellets are uniformly fixed on the top of the rotating plate.

[0005] A further technical solution is that the bottom of the ring die is rotatably connected to a vertically arranged rotating shaft, and a number of extrusion rollers are rotatably connected around the rotating shaft via a bracket. A number of extrusion holes are opened on the side wall of the ring die, and the positions of the extrusion rollers and the extrusion holes correspond to each other. A discharge port is opened on the side wall of the processing box at the same height as the extrusion holes, and a discharge plate is fixed at the discharge port. The rotating shaft is driven to rotate by a driving mechanism.

[0006] A further technical solution is that the drive mechanism includes a second motor, the output end of the second motor is keyed to a drive pulley, the drive pulley is connected to a driven pulley via a belt drive, and the rotating shaft passes through the bottom of the processing box and is coaxially and fixedly connected to the driven pulley.

[0007] A further technical solution includes a cutting mechanism, which comprises a top plate, a rotating plate, and a power source for driving the top plate and the rotating plate to rotate synchronously. The top plate and the rotating plate are rotatably connected to the outer wall of the ring mold, and multiple cutting blades are fixed between the top plate and the rotating plate.

[0008] A further technical solution is that the power source includes a first motor, a gear ring is fixedly fitted on the outer edge of the top plate, and a drive gear that meshes with the gear ring is fixedly connected to the output end of the first motor.

[0009] The working principle and beneficial effects of this application are as follows: The spiral structure of the rotating plate guides the material to move slowly from top to bottom. The heating wire generates heat when energized, which is transferred to the material through the heat-conducting rotating plate, reducing the material's humidity and preventing excessive humidity from clogging the mold. This ensures that the particles are not easily broken. The material drying process is integrated inside the ring mold, eliminating the need for separate external drying equipment and material transfer processes. This avoids the problem of secondary moisture absorption during material transfer and ensures the stability of the drying effect. Attached Figure Description

[0010] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the internal structure of this application; Figure 3 This is a schematic diagram of the drying mechanism described in this application; Figure 4 This is a schematic diagram of the drive mechanism described in this application; Figure 5 This is a schematic diagram of the cutting mechanism described in this application.

[0012] In the diagram: 2. Processing box; 3. Discharge port; 4. Discharge plate; 5. Ring die; 6. Feed hopper; 7. Drying mechanism; 71. Rotating plate; 72. Protruding particles; 73. Heating wire; 8. Cutting mechanism; 81. Top plate; 82. Gear ring; 83. Cutting blade; 84. Rotating disk; 85. First motor; 86. Drive gear; 9. Drive mechanism; 91. Second motor; 92. Drive pulley; 93. Belt; 94. Driven pulley; 10. Extrusion hole; 11. Rotating shaft; 12. Extrusion roller. Detailed Implementation

[0013] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0014] like Figures 1-5As shown, a ring die pellet mill includes a processing chamber 2, inside which a ring die 5 is fixed. The top of the processing chamber 2 is connected to a feed hopper 6, and the feed hopper 6 has a drying mechanism 7. The drying mechanism 7 includes a spiral plate 71 that spirals downward along the inlet of the feed hopper 6 to the feed port of the ring die 5 and is fixed to the ring die 5. Multiple sets of heating wires 73 are fixed inside the spiral plate 71, and several protruding particles 72 are uniformly fixed on the top of the spiral plate 71.

[0015] In this embodiment, biomass raw materials such as sawdust and straw are fed into the feed hopper 6. The spiral structure of the rotating plate 71 guides the material to move slowly from top to bottom. The heating wire 73 is energized to generate heat, which is transferred to the material through the heat-conducting rotating plate 71, reducing the material's moisture content and preventing excessive moisture from clogging the mold, thus ensuring that the particles are not easily broken. In this embodiment, the rotating plate 71 is arranged in a spiral shape to increase the contact area with the material and improve drying efficiency. A temperature control device is provided on the outer wall of the ring mold 5 to control the temperature of the heating wire 73, thereby adjusting the drying temperature. Multiple protruding particles 72 are evenly arranged on the top of the rotating plate 71. When the material moves on the top of the rotating plate 71, it is turned over, making the material heated evenly and quickly reducing moisture content. The rotating plate 71 is made of a heat-conducting material, such as aluminum.

[0016] like Figure 2 As shown, a vertically arranged rotating shaft 11 is rotatably connected to the bottom of the ring die 5. Several extrusion rollers 12 are rotatably connected to the circumference of the rotating shaft 11 via brackets. Several extrusion holes 10 are formed on the side wall of the ring die 5. The positions of the extrusion rollers 12 and the extrusion holes 10 correspond to each other. A discharge port 3 is formed on the side wall of the processing box 2 at the same height as the extrusion holes 10. A discharge plate 4 is fixed at the discharge port 3. The rotating shaft 11 is driven to rotate by a driving mechanism 9. The driving mechanism 9 drives a pair of extrusion rollers 12 on the rotating shaft 11 to rotate synchronously. The rotating extrusion rollers 12 exert pressure on the dried material inside the ring die 5, pushing the material towards the extrusion holes 10 on the outer wall of the ring die 5. Under pressure, the material passes through the extrusion holes 10 and is finally discharged through the discharge port 3. It is then guided to the collection device by the discharge plate 4, completing the entire processing flow.

[0017] One embodiment of the drive mechanism 9 includes a second motor 91, the output end of which is keyed to a drive pulley 92. The drive pulley 92 is driven by a belt 93 to a driven pulley 94. The rotating shaft 11 passes through the bottom of the processing chamber 2 and is coaxially and fixedly connected to the driven pulley 94. The second motor 91 drives the drive pulley 92 to rotate, which in turn drives the driven pulley 94 and the rotating shaft 11 to rotate via the belt 93, thereby driving a pair of extrusion rollers 12 on the rotating shaft 11 to rotate synchronously. The rotating extrusion rollers 12 exert extrusion pressure on the dried material inside the ring die 5, pushing the material towards the extrusion holes 10 on the outer wall of the ring die 5. Under pressure, the material passes through the extrusion holes 10, forming a long strip-shaped blank consistent with the shape of the hole, and exits from the outside of the ring die 5.

[0018] Based on this, a cutting mechanism 8 is provided, which includes a top plate 81, a rotating plate 84, and a power source that drives the top plate 81 and the rotating plate 84 to rotate synchronously. The top plate 81 and the rotating plate 84 are rotatably connected to the outer wall of the ring die 5, and multiple cutting blades 83 are fixed between the top plate 81 and the rotating plate 84. A long strip-shaped billet with the same shape as the hole is formed and passes through the outside of the ring die 5. The cutting mechanism 8 works synchronously. When the long strip-shaped billet passes through the extrusion hole 10, the cutting mechanism 8 cuts it to form biomass pellets of uniform length. The cut pellets fall to the bottom of the processing box 2 under the action of gravity.

[0019] The power source includes a first motor 85. A gear ring 82 is fixedly fitted onto the outer edge of the top plate 81. The output end of the first motor 85 is fixedly connected to a drive gear 86 that meshes with the gear ring 82. The first motor 85 drives the drive gear 86 to rotate. The drive gear 86 meshes with the gear ring 82 on the outer side of the top plate 81, causing the top plate 81, the rotating disk 84, and the cutting blade 83 between them to rotate. When the long strip of material passes through the extrusion hole 10, the rotating cutting blade 83 cuts it into biomass pellets of uniform length. The cut pellets fall onto the top of the rotating disk 84 and are eventually discharged through the discharge port 3 as the rotating disk 84 continues to rotate.

[0020] In use, the biomass raw materials to be processed, such as sawdust and straw, are fed into the feed hopper 6. The spiral structure of the rotating plate 71 guides the material to move slowly from top to bottom. The heating wire 73 is energized to generate heat, which is transferred to the material through the heat-conducting rotating plate 71 to reduce the material's moisture content and prevent excessive moisture from causing mold blockage. The drive mechanism 9 drives a pair of extrusion rollers 12 on the rotating shaft 11 to rotate synchronously. The rotating extrusion rollers 12 exert pressure on the dried material inside the ring die 5, pushing the material towards the extrusion hole 10 on the outer wall of the ring die 5. Under pressure, the material passes through the extrusion hole 10, forming a long strip-shaped blank that matches the shape of the hole. It then exits from the outside of the ring die 5. The cutting mechanism 8 works synchronously. When the long strip-shaped blank exits from the extrusion hole 10, the cutting mechanism 8 cuts it to form biomass pellets of uniform length. The cut pellets fall to the bottom of the processing box 2 under gravity and are finally discharged through the discharge port 3. They are then guided to the collection device by the discharge plate 4, completing the entire processing process.

[0021] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A ring die granulator, comprising a processing box (2) with a ring die (5) fixed inside, and a feeding hopper (6) communicated with the top of the processing box (2), characterized in that, The feed hopper (6) has a drying mechanism (7), which includes a spiral plate (71) that spirals downward along the feed hopper (6) to the feed port of the ring die (5) and is fixed to the ring die (5). Multiple sets of heating wires (73) are fixed inside the spiral plate (71), and several protruding particles (72) are uniformly fixed on the top of the spiral plate (71).

2. A ring die pellet mill according to claim 1, characterized in that The bottom of the ring die (5) is rotatably connected to a vertically arranged rotating shaft (11). Several extrusion rollers (12) are rotatably connected around the rotating shaft (11) via a bracket. Several extrusion holes (10) are opened on the side wall of the ring die (5). The positions of the extrusion rollers (12) and the extrusion holes (10) are corresponding. A discharge port (3) is opened on the side wall of the processing box (2) at the same height as the extrusion holes (10). A discharge plate (4) is fixed at the discharge port (3). The rotating shaft (11) is driven to rotate by a driving mechanism (9).

3. A ring die pellet mill according to claim 2, characterised in that The drive mechanism (9) includes a second motor (91), the output end of which is key-connected to a drive pulley (92). The drive pulley (92) is connected to a driven pulley (94) via a belt (93). The rotating shaft (11) passes through the bottom of the processing box (2) and is coaxially fixedly connected to the driven pulley (94).

4. A ring die pellet mill according to claim 1, characterized in that It also includes a cutting mechanism (8), which includes a top plate (81), a rotating plate (84) and a power source that drives the top plate (81) and the rotating plate (84) to rotate synchronously. The top plate (81) and the rotating plate (84) are rotatably connected to the outer wall of the ring mold (5). Multiple cutting blades (83) are fixed between the top plate (81) and the rotating plate (84).

5. A ring die pellet mill according to claim 4, characterised in that The power source includes a first motor (85), and a gear ring (82) is fixedly fitted on the outer edge of the top plate (81). The output end of the first motor (85) is fixedly connected to a drive gear (86) that meshes with the gear ring (82).

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