A wet granulation device for deer biomass fuel particles

Abstract

The application discloses a kind of biomass fuel granules wet granulation device of deer source, it is related to the technical field of granulating device, including base, granulating bin, main shaft, flat die, compression roller, swing lifting mechanism;Swing lifting mechanism is equipped with sensor for detecting the rotation state of compression roller;Swing bar is hinged on flat die, and one end of swing bar extends towards the radial outside of granulating bin;Linkage breaking mechanism is provided between swing lifting mechanism and swing bar, when compression roller slips, sensor triggers swing lifting mechanism to drive compression roller to lift up, simultaneously, another end of swing bar is driven to lift up by linkage breaking mechanism to break material.The application, by setting zero speed switch on swing arm, can monitor the rotation state of compression roller in real time.When material humidity is too large or too smooth to cause insufficient friction, compression roller is passively slipped, sensor can capture the signal of speed returning to zero instantly, and feedback to control cabinet, to realize accurate identification and rapid response.

Description

Technical Field

[0001] This invention relates to the field of pelletizing equipment technology, specifically to a wet pelletizing equipment for deer-sourced biomass fuel pellets. Background Technology

[0002] Biomass fuel refers to fuel made by burning biomass materials, primarily agricultural and forestry waste (such as straw, sawdust, bagasse, and rice husks). It differs mainly from fossil fuels. According to national policies and environmental standards, direct combustion of biomass is classified as a high-pollution fuel, permitted only for use in rural stoves and not in urban areas. The actual application of biomass fuel primarily involves biomass pellet fuel, which is made from agricultural and forestry waste as raw materials. Through processes such as crushing, mixing, extrusion, and drying, it is produced into various shapes (such as blocks and pellets) that can be directly burned—a new type of clean fuel. Livestock manure, such as deer manure, can also be used as a raw material for biomass fuel; after pelleting, it can also be used as biomass fuel.

[0003] When biomass fuel made from animal manure is pelleted, animal manure with a certain moisture content is generally fed into the pelleting equipment. Through the extrusion of the pressure rollers, the animal manure is squeezed out of the die holes of the flat die of the pelletizer, thus forming granules. The granules are then dried by subsequent drying equipment.

[0004] In existing technologies, the power (motor) of common flat die pellet mills only drives the main shaft to rotate. The main shaft drives the pressure roller frame to rotate, causing the pressure rollers mounted on the pressure roller frame to revolve around the center of the main shaft. Since the pressure rollers themselves do not have independent power input, they rotate passively above the flat die, that is, they rely on the friction between the pressure rollers and the material when the main shaft rotates to drive their rotation, thereby squeezing the material into the die holes of the flat die.

[0005] However, this passively rotating structure has the following technical problems: when the material has excessive moisture, contains too much oil, or has an overly smooth surface, the coefficient of friction between the material and the pressure roller decreases sharply, and the friction is insufficient to drive the pressure roller to rotate, causing the pressure roller to slide on the material (i.e., "slippage"), and the material cannot be effectively fed into the die orifice. At the same time, because existing granulation equipment lacks a monitoring mechanism for the slippage of the pressure roller, once slippage occurs, operators cannot detect and intervene in time, causing the pressure roller to slip continuously in a local area. The material accumulates and is subjected to repeated friction and compression, which can easily cause the material in that area to gelatinize, jam instantly, or clog the orifice (die clogging), seriously affecting granulation efficiency and equipment life. Summary of the Invention

[0006] The purpose of this invention is to provide a wet pelletizing device for deer-derived biomass fuel pellets to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a wet pelletizing device for deer-source biomass fuel pellets, comprising a base, a pelletizing chamber, a main shaft, a flat die, and a pressure roller. The pelletizing chamber is mounted on the base, and the flat die is coaxially fixed inside the pelletizing chamber. The main shaft passes through the pelletizing chamber and extends through the flat die to above the flat die. A swing lifting mechanism is connected to the upper end of the main shaft. The pressure roller is rotatably mounted on the swing lifting mechanism. The swing lifting mechanism is used to drive the pressure roller closer to or away from the flat die. A sensor for detecting the rotation state of the pressure roller is installed on the swing lifting mechanism. A swing bar is hinged to the flat mold, and one end of the swing bar extends radially outward toward the granulation chamber. A linkage breaking mechanism is provided between the swing lifting mechanism and the swing bar. When the pressure roller slips, the sensor triggers the swing lifting mechanism to lift the pressure roller upward, and at the same time, the linkage breaking mechanism drives the other end of the swing bar to tilt upward to break the material.

[0008] Furthermore, the swing lifting mechanism includes a mounting hinge fixed to the upper end of the main shaft, a fixed shaft hinged to opposite sides of the mounting hinge and capable of swinging up and down, and a drive assembly for driving the fixed shaft to swing. The pressure roller is rotatably mounted on a fixed shaft; a swing arm is fixedly connected to one end of the fixed shaft adjacent to the main shaft, the drive assembly is connected to the swing arm to drive it to swing up and down, and the sensor is mounted on the swing arm.

[0009] Furthermore, the drive assembly includes a cylinder hinged to the main shaft, and a connecting block is fixedly connected to the end of the cylinder rod, the connecting block being hinged to the swing arm; The sensor is a zero-speed switch. When the pressure roller slips and the rotation speed is zero, the sensor generates a sensing signal and transmits it to the external control cabinet. The control cabinet then controls the cylinder rod of the cylinder to retract, thereby driving the swing arm to swing upward.

[0010] Furthermore, an annular protrusion is fixedly connected to the middle part of the upper surface of the flat mold, and the swing bar is hinged to the protrusion; the linkage breaking mechanism includes a fixed arm that is fixedly connected to the swing arm and extends downwardly, and a ball bearing that is rotatably embedded in the lower end of the fixed arm. A pressure plate is fixed to the upper surface of one end of the swing bar near the main shaft. When the swing arm swings upward, the ball rolls into contact with the upper surface of the pressure plate and presses the pressure plate downward, causing the end of the swing bar away from the main shaft to tilt upward.

[0011] Furthermore, multiple swing bars are arranged in an array along the axial direction of the flat mold, the opposite ends of two adjacent pressure plates are connected in contact, and the edges of the pressure plates are provided with arc-shaped chamfers to allow the balls to roll smoothly.

[0012] Furthermore, the flat mold end face is provided with a mounting groove for engaging the swing bar, and under normal conditions, the upward-facing side of the swing bar is flush with the upper surface of the flat mold. The lower surface of the swing bar near the main shaft has a mounting hole. A return spring is vertically installed in the mounting hole. The two ends of the return spring elastically abut against the top wall of the mounting hole and the upper surface of the mold, respectively. Under normal conditions, it provides an upward elastic resisting force to the swing bar, so that the end of the swing bar away from the main shaft maintains the tendency to swing downward and return.

[0013] Furthermore, a first mounting cavity and a second mounting cavity are respectively provided at both axial ends of the pressure roller, with the first mounting cavity close to the main shaft and the second mounting cavity away from the main shaft; A locking ring is fixedly sleeved at one end of the fixed shaft near the main shaft and located in the first mounting cavity. A buffer spring is installed in the first mounting cavity. The two ends of the buffer spring elastically abut against the end face of the locking ring and the inner wall of the first mounting cavity, respectively, and under normal conditions, it has the potential energy to move the pressure roller away from the main shaft.

[0014] Furthermore, the end face of the pressure roller away from the main shaft is coaxially connected to a mounting part, and a rolling part is rotatably embedded in the end face of the mounting part; The inner wall of the granulation chamber is coaxially fixed with a fixing ring, and the fixing ring is coaxially provided with a rolling groove that rolls with the rolling part. The inner diameter of the rolling groove decreases from top to bottom. The end of the fixed shaft away from the main shaft is fixedly sleeved with a stop ring located in the second mounting cavity, which is used to limit the movement of the pressure roller away from the main shaft.

[0015] Furthermore, when the swing lifting mechanism drives the pressure roller to lift upward, the rolling part rolls upward in the rolling groove. Due to the change in the inner diameter of the rolling groove, the rolling part drives the pressure roller to move laterally towards the main shaft. When the pressure roller presses down, the rolling part rolls downward in the rolling groove. Under the elastic resistance of the buffer spring, the pressure roller moves laterally away from the main shaft to reset.

[0016] Furthermore, when the pressure roller is in a horizontal downward pressing state, the minimum distance between its periphery and the upper surface of the flat die is between 0.1 and 0.3 mm; A speed reducer and a motor are installed on the base. The input shaft of the speed reducer is driven by the motor, and the output shaft of the speed reducer is driven by the main shaft. The granulation chamber has an open top and a closed bottom, and a material discharge chute that communicates with the inner cavity is fixed to the wall.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by setting a zero-speed switch (sensor) on the swing arm, the rotational state of the pressure roller can be monitored in real time. When the material has excessive moisture or is too smooth, resulting in insufficient friction and passive slippage of the pressure roller, the sensor can instantly capture the signal of the rotational speed returning to zero and feed it back to the control cabinet, achieving accurate identification and rapid response. After receiving the signal, the control cabinet immediately controls the drive source (cylinder) to swing the swing arm up quickly, lifting the pressure roller away from the material surface, cutting off the continuous contact between the pressure roller and the paste-like material, effectively avoiding the instantaneous jamming or die blockage (die clogging) caused by continuous friction and squeezing of local materials, protecting the core components of the equipment, and achieving automatic escape and anti-jamming. 2. In this invention, a hinged swing bar is provided at the protruding part of the center of the flat die. When slippage occurs and the pressure roller rises, the pressure plate is pressed downward through the linkage mechanism (fixed arm and ball bearing), causing the outer end of the swing bar to tilt upward and protrude from the surface of the flat die, directly generating a mechanical lifting force. This breaks through the already hardened and gelatinized material layer near the slippage area. After the gelatinized layer is destroyed, the material returns to a loose state. When the pressure roller presses down again, it can smoothly bite the material and squeeze it into the die hole, eliminating the need for manual shutdown to clean the gelatinized material. This significantly shortens the troubleshooting time, ensures efficient and continuous granulation operations, breaks through the gelatinized layer, eliminates material hardening, and ensures continuous granulation. 3. In this invention, during the lifting process of the pressure roller, the outer rolling part rolls upward along the variable diameter rolling groove with a larger upper diameter and a smaller lower diameter. Due to the change in the diameter of the rolling groove, the pressure roller is forced to generate a lateral movement towards the main shaft (inward) while being lifted upward. This lateral displacement causes the surface of the pressure roller to generate axial shear friction with the gelatinized material below, which can forcibly scrape off or peel off the gelatinized material adhering to the surface of the pressure roller, thereby achieving self-cleaning of the pressure roller and preventing operation with defects (the pressure roller will still slip when pressed down again with material on its surface). This achieves lateral self-cleaning of the pressure roller and reduces the adhesion of surface materials. 4. In this invention, a reset spring is provided below the swing bar. When the pressure roller is pressed down again and the ball is disengaged from the pressure plate, the reset spring releases its potential energy, driving the swing bar to swing downward and re-engage in the mounting groove, flush with the flat mold, preparing for the next extrusion and breaking of the paste. The operation cycle is smooth. A buffer spring is provided inside the pressure roller. When the pressure roller is pressed down and reset, and the rolling part rolls downward, the buffer spring pushes the pressure roller back to its original position away from the main shaft (outward), ensuring that the pressure roller is realigned with the material extrusion area. At the same time, the buffer spring can also absorb some of the impact force during daily extrusion operations, playing an overload protection role. Flexible reset and elastic buffering improve the stability and lifespan of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a wet pelletizing device for deer-source biomass fuel pellets according to the present invention; Figure 2 for Figure 1 A schematic diagram showing the positional relationship of the structure from another perspective; Figure 3 This is a schematic diagram showing the positional relationship of the flat die, main shaft, and pressure roller after assembly in this invention; Figure 4 for Figure 3 A schematic diagram showing the positional relationship of the middle section after it has been cut open. Figure 5 for Figure 4 A magnified schematic diagram of the positional relationship of the local structure at point A in the middle; Figure 6 This is a schematic diagram showing the positional relationship of the main shaft, pressure roller, and swing bar after assembly in this invention; Figure 7 for Figure 6 Schematic diagram of the positional relationships of the central structure after explosive decomposition; Figure 8 for Figure 7 A magnified schematic diagram of the positional relationship of the local structure at point B in the middle section; Figure 9 for Figure 6 Another angular positional diagram of the structure; Figure 10 for Figure 9 A magnified schematic diagram of the positional relationship of the local structure at point K.

[0019] The following are the annotations for each item in the figure: 1. Motor; 2. Base; 3. Reducer; 4. Material feeding chute; 5. Granulation bin; 6. Fixed ring; 7. Cylinder; 8. Main shaft; 9. Swing bar; 10. Flat mold; 11. Pressure roller; 12. Rolling groove; 13. Swing arm; 14. Connecting block; 15. Protrusion; 16. Mounting hinge; 17. Fixed shaft; 18. Rolling part; 19. Mounting part; 20. Stop ring; 21. Buffer spring; 22. Locking ring; 23. Fixed arm; 24. Sensor; 25. Pressure plate; 26. Ball bearing; 27. Return spring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-10This invention provides a technical solution: a wet pelletizing device for deer-source biomass fuel pellets, comprising a base 2, a reducer 3 mounted on the base 2, the input shaft of the reducer 3 being driven by a motor 1 mounted on the base 2, and the output shaft of the reducer 3 being driven by a main shaft 8. A pelletizing chamber 5 is mounted on the base 2, with its bottom located above the reducer 3. The end of the main shaft 8 away from the reducer 3 passes into the pelletizing chamber 5, and the main shaft 8 can rotate freely within the pelletizing chamber 5. The pelletizing chamber 5 has an open top and a closed bottom. A material discharge chute 4 is fixedly connected to the wall of the pelletizing chamber 5, and the material discharge chute 4 communicates with the inner cavity of the pelletizing chamber 5. A flat mold 10 is coaxially fixed to the inner cavity wall. The surface of the flat mold 10 has multiple mold holes. The main shaft 8 passes through the end face of the flat mold 10 and is slidably connected to the flat mold 10. The upper end of the main shaft 8 extends above the flat mold 10. In addition, a mounting hinge 16 is fixedly sleeved on the upper end of the main shaft 8. Fixed shafts 17 that can swing up and down are hinged to the opposite side walls of the mounting hinge 16. A pressure roller 11 is rotatably mounted on the periphery of the fixed shaft 17. The pressure roller 11 can rotate freely on the periphery of the fixed shaft 17. When the fixed shaft 17 swings to the horizontal state, the minimum distance between the periphery of the pressure roller 11 and the upper surface of the flat mold 10 is between 0.1-0.3mm. Combination Figures 3 to 10 As shown, and please refer to the following: Figure 3 , Figure 4 A swing arm 13 is fixedly connected to one end of the fixed shaft 17 near the main shaft 8. The upper end of the swing arm 13 extends upward first and then extends obliquely away from the main shaft 8. A fixed hinge seat is fixedly sleeved on the upper end of the main shaft 8. Two cylinders 7 are hingedly mounted on the fixed hinge seat. Connecting blocks 14 are fixedly connected to the cylinder rod ends of the cylinders 7. The two connecting blocks 14 are respectively hinged to the two swing arms 13. By extending or shortening the cylinder rods of the cylinders 7, the connecting blocks 14 can be moved up and down, thereby causing the swing arms 13 to rotate up and down along the fixed shaft 17 at the hinge point with the mounting hinge seat 16. This allows the pressure roller 11 to move closer to or away from the flat mold 10. In addition, a sensor 24 is installed on the swing arm 13 to detect whether the pressure roller 11 is rotating. The sensor 24 can be set as a zero-speed switch and is electrically connected to an external control cabinet. When the pressure roller 11 slips on the material surface, the rotation of the pressure roller 11 disappears, which causes the sensor 24 to detect that the speed of the pressure roller 11 is zero, thereby generating an induction signal. This induction signal is transmitted to the control cabinet, which then determines that the pressure roller 11 is in a slipping state. The control cabinet then controls the cylinder 7 to start, and the cylinder rod of the cylinder 7 quickly retracts, which drives the connecting block 14 to move upward. When the connecting block 14 moves upward, it will drive the swing arm 13 to rotate upward along the fixed shaft 17 at the hinge on the mounting hinge seat 16, causing the pressure roller 11 to swing away from the flat mold 10, thereby causing the pressure roller 11 to disengage from the state of contact with the material surface. Combination Figures 3 to 10 As shown, and please refer to the following: Figure 8 , Figure 9 and Figure 10 A ring-shaped protrusion 15 is fixedly connected to the middle part of the upper surface of the flat mold 10. The protrusion 15 is coaxial with the flat mold 10. Multiple notch-shaped mounting openings are provided on the protrusion 15, and a swing bar 9 is provided in each mounting opening. The multiple swing bars 9 are arranged in an array along the axial direction of the flat mold 10. The end of the swing bar 9 away from the protrusion 15 extends radially outward towards the granulation chamber 5. The swing bar 9 is hinged to the protrusion 15. A mounting groove for engaging the swing bar 9 is provided on the end face of the flat mold 10. When the swing bar 9 is in a horizontal state, the upward-facing side of the swing bar 9 is flush with the upper surface of the flat mold 10. The swing bar 9 is adjacent to the main... A pressure plate 25 is fixedly attached to the upper surface of one end of the shaft 8. The opposite ends of two adjacent pressure plates 25 are connected in abutment. A fixed arm 23 extending downward is fixedly attached to the end of the swing arm 13 facing the main shaft 8. The end of the fixed arm 23 away from the fixed shaft 17 extends inclined towards the main shaft 8. In addition, a ball bearing 26 is rotatably embedded in the lower end of the fixed arm 23. When the swing arm 13 swings upward, the ball bearing 26 will approach the pressure plate 25. When the swing arm 13 swings to a fixed angle, the ball bearing 26 will roll into contact with the upper surface of the pressure plate 25. At this time, as the swing arm 13 continues to swing upward, the ball bearing 26 will exert a downward squeezing force on the pressure plate 25. This causes the pressure plate 25 to drive the swing bar 9 to swing, with one end of the swing bar 9 away from the main shaft 8 swinging upwards and the other end swinging downwards. This upward swing of the swing bar 9, protruding from the upper surface of the flat mold 10, lifts the material near the slippage point, breaking through the gelatinized layer and allowing the subsequent pressure roller 11 to re-press the material at that location. The opposing ends of adjacent pressure plates 25 abut against each other, ensuring that the balls 26 can smoothly press the pressure plate 25 regardless of their position. The ball 26 rolls on the plate 25, thus preventing it from getting stuck between two adjacent pressure plates 25. The edges of the pressure plates 25 are all provided with rounded chamfers, so that the ball 26 can roll smoothly from the chamfers to the surface of the pressure plate 25. In addition, a blind hole-type mounting hole is provided on the lower surface of the swing bar 9 near the main shaft 8. A return spring 27 is vertically installed in the mounting hole. The two ends of the return spring 27 elastically abut against the inner top wall of the mounting hole and the upper surface of the flat mold 10 respectively. Under normal conditions, the return spring 27 has an upward elastic abutting force on the swing bar 9, so that the end of the swing bar 9 away from the main shaft 8 has a downward swinging tendency. Combination Figures 3 to 10 As shown, and please refer to the following: Figure 4 and Figure 5The pressure roller 11 has a first mounting cavity and a second mounting cavity at its two axial ends, respectively. The first mounting cavity is close to the main shaft 8, while the second mounting cavity is close to the radial outer side of the granulation chamber 5. A locking ring 22 is fixedly sleeved on the end of the fixed shaft 17 close to the main shaft 8. The locking ring 22 is located in the first mounting cavity. A buffer spring 21 is installed in the first mounting cavity. The two ends of the buffer spring 21 elastically abut against the end face of the locking ring 22 and the inner wall of the first mounting cavity, respectively. Under normal conditions, the buffer spring 21 has the potential energy to move the pressure roller 11 away from the main shaft 8. The end face of the pressure roller 11 away from the main shaft 8 is coaxially connected to the mounting part 19. A rolling part 18 is rotatably embedded on the end face of the mounting part 19. The rolling part 18 and the mounting part 19 are coaxial. A fixed ring 6 is coaxially fixed to the inner wall of the granulation chamber 5. The fixed ring 6 has a rolling groove 1 coaxially formed. 2. The inner diameter of the rolling groove 12 decreases sequentially from top to bottom, and the rolling part 18 rolls in contact with the wall of the rolling groove 12. When the swing arm 13 swings upward, it will drive the pressure roller 11 to swing upward as well, thereby causing the rolling part 18 to swing upward within the rolling groove 12. When the rolling part 18 swings upward, since the inner diameter of the rolling groove 12 changes, the rolling part 18 will drive the pressure roller 11 to move towards the main shaft 8, causing the pressure roller 11 to move laterally with the surface of the gelatinized material, thereby scraping off the gelatinized material adhering to the surface of the pressure roller 11, or at least reducing the adhesion of the gelatinized material to the surface of the pressure roller 11 to a certain extent. In addition, a stop ring 20 is fixedly sleeved on the end of the fixed shaft 17 away from the main shaft 8. The stop ring 20 is located in the second mounting cavity and is used to limit the movement of the pressure roller 11 away from the main shaft 8.

[0022] Working principle of the invention: Material is fed into the flat mold 10, and the output shaft of the reducer 3 is driven by the motor 1 to rotate, which in turn drives the main shaft 8 to rotate. When the main shaft 8 rotates, it drives the two fixed shafts 17 to rotate around the axis of the main shaft 8, which in turn allows the pressure roller 11 to squeeze the material. When slippage occurs in a local position, the pressure roller 11 will stop rotating in its own circumferential direction because it is passively rotating. The sensor 24 will sense that the speed of the pressure roller 11 is zero, and then transmit the sensing signal to the external control cabinet. The external control cabinet controls the cylinder 7 to start, and the cylinder rod of the cylinder 7 quickly retracts, which drives the swing arm 13 to swing upward, so that the pressure roller 11 swings upward. When the pressure roller 11 swings upward, it will disengage from the pressure state of the material. At the same time, the ball bearing 26 will begin to approach the pressure plate 25 and exert downward pressure on the pressure plate 25. This causes the pressure plate 25 to drive the swing bar 9 away from the main shaft 8 to swing upward, so that the swing bar 9 protrudes from the upper surface of the flat mold 10 and can break through the gelatinized layer of the material. Then, the control cabinet control cylinder 7 is restarted. The cylinder rod of the cylinder 7 extends, which causes the swing arm 13 to swing downward and the pressure roller 11 to start pressing the material again. The fixed arm 23 will swing in the opposite direction, causing the ball bearing 26 to disengage from the rolling contact state with the pressure plate 25. The elastic potential energy stored in the return spring 27 is released, which drives the swing bar 9 away from the main shaft 8 to swing downward and re-engage in the mounting groove. The whole process does not require manual observation and monitoring. Additionally, when the pressure roller 11 swings upward, the rolling part 18 will roll on the inner wall of the rolling groove 12 of the fixed ring 6, and the rolling part 18 will drive the pressure roller 11 to move towards the main shaft 8, so that the pressure roller 11 can generate lateral displacement with the surface of the paste material, thereby generating frictional force along the axial direction of the pressure roller 11 with the surface of the paste material, thereby scraping off the paste material attached to the surface of the pressure roller 11 to a certain extent. When the pressure roller 11 swings downward again, the rolling part 18 will roll in the opposite direction on the inner wall of the rolling groove 12, and under the action of the elastic resisting force of the buffer spring 21, the pressure roller 11 will move away from the main shaft 8, thereby being able to re-extract the material. After being squeezed by the pressure roller 11, the material will be squeezed out from the die hole of the flat die 10 and then fall from the discharge slide 4 into the external conveying equipment.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wet pelletizing device for deer-derived biomass fuel pellets, comprising a base (2), a pelletizing chamber (5), a main shaft (8), a flat die (10), and a pressure roller (11), wherein the pelletizing chamber (5) is mounted on the base (2), the flat die (10) is coaxially fixed inside the pelletizing chamber (5), and the main shaft (8) extends through the pelletizing chamber (5) and through the flat die (10) to the top of the flat die, characterized in that, The upper end of the main shaft (8) is connected to a swing lifting mechanism, and the pressure roller (11) is rotatably mounted on the swing lifting mechanism. The swing lifting mechanism is used to drive the pressure roller (11) to move closer to or away from the flat mold (10). A sensor (24) for detecting the rotation state of the pressure roller (11) is installed on the swing lifting mechanism. A swing bar (9) is hinged on the flat mold (10). One end of the swing bar (9) extends radially outward toward the granulation chamber (5). A linkage breaking mechanism is provided between the swing lifting mechanism and the swing bar (9). When the pressure roller (11) slips, the sensor (24) triggers the swing lifting mechanism to lift the pressure roller (11) upward. At the same time, the linkage breaking mechanism drives the other end of the swing bar (9) to tilt upward to break the material.

2. The wet pelletizing device for deer-derived biomass fuel pellets according to claim 1, characterized in that, The swing lifting mechanism includes a mounting hinge (16) fixed to the upper end of the main shaft (8), a fixed shaft (17) hinged to opposite sides of the mounting hinge (16) and capable of swinging up and down, and a drive assembly for driving the fixed shaft (17) to swing. The pressure roller (11) is rotatably mounted on a fixed shaft (17); a swing arm (13) is fixedly connected to one end of the fixed shaft (17) near the main shaft (8), the drive assembly is connected to the swing arm (13) to drive it to swing up and down, and the sensor (24) is mounted on the swing arm (13).

3. The wet pelletizing device for deer-derived biomass fuel pellets according to claim 2, characterized in that, The drive assembly includes a cylinder (7) hinged to the main shaft (8), and a connecting block (14) is fixedly connected to the end of the cylinder rod of the cylinder (7). The connecting block (14) is hinged to the swing arm (13). The sensor (24) is a zero-speed switch. When the pressure roller (11) slips and the speed is zero, the sensor (24) generates a sensing signal and transmits it to the external control cabinet. The control cabinet controls the cylinder rod of the cylinder (7) to retract so as to drive the swing arm (13) to swing upward.

4. The wet pelletizing device for deer-derived biomass fuel pellets according to claim 2, characterized in that, The upper surface of the flat mold (10) is fixedly connected to the middle part of the annular protrusion (15), and the swing bar (9) is hinged to the protrusion (15); the linkage breaking mechanism includes a fixed arm (23) fixedly connected to the swing arm (13) and extending downward, and a ball (26) rotatably embedded in the lower end of the fixed arm (23). A pressure plate (25) is fixed to the upper surface of one end of the swing bar (9) near the main shaft (8). When the swing arm (13) swings upward, the ball (26) rolls and contacts the upper surface of the pressure plate (25) and presses the pressure plate (25) downward, causing the end of the swing bar (9) away from the main shaft (8) to tilt upward.

5. A wet pelletizing device for deer-derived biomass fuel pellets according to claim 4, characterized in that, Multiple swing bars (9) are arranged in an array along the axial direction of the flat mold (10), and the opposite ends of two adjacent pressure plates (25) are connected by abutting, and the edges of the pressure plates (25) are provided with arc-shaped chamfers to allow the balls (26) to roll smoothly.

6. The wet pelletizing device for deer-derived biomass fuel pellets according to claim 4, characterized in that, The flat mold (10) has an installation groove on its end face for engaging the swing bar (9). Under normal conditions, the upward-facing side of the swing bar (9) is flush with the upper surface of the flat mold (10). The swing bar (9) has a mounting hole on the lower surface of the end near the main shaft (8). A return spring (27) is vertically installed in the mounting hole. The two ends of the return spring (27) elastically abut against the top wall of the mounting hole and the upper surface of the flat mold (10). Under normal conditions, it provides an upward elastic resisting force to the swing bar (9), so that the end of the swing bar (9) away from the main shaft (8) maintains the tendency to swing downward and return.

7. A wet pelletizing device for deer-derived biomass fuel pellets according to claim 2, characterized in that, The pressure roller (11) has a first mounting cavity and a second mounting cavity at its two axial ends, respectively. The first mounting cavity is close to the main shaft (8), and the second mounting cavity is far away from the main shaft (8). The fixed shaft (17) is fixedly sleeved with a locking ring (22) located in the first mounting cavity at one end near the main shaft (8). A buffer spring (21) is installed in the first mounting cavity. The two ends of the buffer spring (21) elastically abut against the end face of the locking ring (22) and the inner wall of the first mounting cavity, respectively, and under normal conditions, it has the potential energy to move the pressure roller (11) away from the main shaft (8).

8. A wet pelletizing device for deer-derived biomass fuel pellets according to claim 7, characterized in that, The end face of the pressure roller (11) away from the main shaft (8) is coaxially connected to the mounting part (19), and the end face of the mounting part (19) is rotatably embedded with the rolling part (18). The inner wall of the granulation chamber (5) is coaxially fixed with a fixing ring (6), and the fixing ring (6) is coaxially provided with a rolling groove (12) that rolls with the rolling part (18). The inner diameter of the rolling groove (12) decreases from top to bottom. The end of the fixed shaft (17) away from the main shaft (8) is fixedly sleeved with a stop ring (20) located in the second mounting cavity, which is used to limit the movement of the pressure roller (11) away from the main shaft (8).

9. A wet pelletizing device for deer-derived biomass fuel pellets according to claim 8, characterized in that, When the swing lifting mechanism drives the pressure roller (11) to lift upward, the rolling part (18) rolls upward in the rolling groove (12). Due to the change in the inner diameter of the rolling groove (12), the rolling part (18) drives the pressure roller (11) to move laterally towards the main shaft (8). When the pressure roller (11) presses down, the rolling part (18) rolls downward in the rolling groove (12), and under the elastic resistance of the buffer spring (21), the pressure roller (11) moves laterally away from the main shaft (8) to reset.

10. A wet pelletizing device for deer-derived biomass fuel pellets according to claim 1, characterized in that, When the pressure roller (11) is in a horizontal downward pressing state, the minimum distance between its periphery and the upper surface of the flat mold (10) is between 0.1 and 0.3 mm; The base (2) is equipped with a reducer (3) and a motor (1). The input shaft of the reducer (3) is driven to the motor (1), and the output shaft of the reducer (3) is driven to the main shaft (8). The granulation chamber (5) has an open top and a closed bottom, and a material discharge chute (4) that communicates with the inner cavity is fixed to the wall.

Images