Small straw fuel granulator

Abstract

The invention discloses a small straw fuel granulator, and relates to the technical field of biomass fuels, the small straw fuel granulator comprises a base, and further comprises a conversion assembly which comprises a first support rotationally connected to one side of the base, a second support rotationally connected to the other side of the base and a connecting ring fixedly connected to the middle of the first support; the middle of the side, away from the first support, of the connecting ring is fixedly connected with the second support, the upper end opening and the lower end opening of the connecting ring are fixedly connected with ring dies, a plurality of meshes are formed in the periphery of the side face of each ring die, and the inner diameters of the two ring dies are consistent with the inner diameter of the connecting ring. The granulator is provided with the upper ring die and the lower ring die with two hole diameters, the positions of the upper ring die and the lower ring die are automatically exchanged through overall overturning, the compression roller automatically falls into the ring die located below at the moment along with the gravity of the compression roller, compared with an existing ring die overturning technology, the problem that the structure is fine and complex is solved, and the granulator has the advantages of being small in manufacturing difficulty and low in cost and has wide application prospects. The structure is simpler, and the maintenance is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass densification molding fuel processing, and more specifically, to a small straw fuel granulator. Background Art

[0002] A biomass granulator is a biomass densification molding fuel processing device, which mainly uses agricultural and forestry processing wastes such as straw and rice husks as raw materials. After being pretreated into a powder form, it is then solidified and extruded into biomass particles through the biomass granulator, making transportation and storage extremely convenient.

[0003] Currently, the ring die biomass granulator is a commonly used type of straw fuel granulator, but it still has deficiencies in use. Specifically, its ring die usually only has one aperture and is encapsulated inside the device, making disassembly and assembly inconvenient. Therefore, when different particle sizes need to be prepared, replacing the ring die will be time-consuming and laborious, which is not conducive to improving work efficiency and has certain limitations in use.

[0004] In the prior art, for example, a vertical ring die biomass granulator shown in the authorized announcement number CN119175046B, by using a lifting mechanism and a flipping mechanism in cooperation, the ring die mechanism can be flipped, and the granulation hole group originally at the upper part is flipped to the lower part, solving the problem that the ring die aperture is single in the prior art, resulting in time-consuming and laborious replacement of the ring die when preparing different particle sizes. However, there are still inconveniences in its operation. Specifically, in this technical solution, it is necessary to use an electric push rod and an electromagnet to clamp the ring die mechanism together with the cylinder body, and then transfer the whole upward to the outside of the machine body, that is, the outer casing, through a lead screw. Then, it is rotated 180 degrees by another motor, and finally dropped back to its original position. It can be seen that its flipping action is relatively cumbersome and requires the close cooperation and participation of a variety of electrical equipment. Compared with most ring die granulators, its design and manufacturing difficulty is greater, the cost is higher, and the energy consumption is also more. Moreover, a large amount of dust will inevitably be generated during the feeding, turning, and extrusion processing of the straw fragments, which is very unfavorable for the long-term use of the above-mentioned precision electrical equipment.

[0005] To solve the above problems, a small straw fuel granulator is proposed. Summary of the Invention

[0006] To solve the above technical problems, a small straw fuel granulator is provided, and this technical solution solves the problems raised in the above background art.

[0007] To achieve the above objectives, the present invention can adopt the following technical solutions:

[0008] The present invention provides a small straw fuel pellet machine, which includes a base, and also includes a conversion component, which includes a bracket one rotatably connected to one side of the base, a bracket two rotatably connected to the other side of the base, and an adapter ring fixedly connected to the middle of the bracket one. The middle of the side of the adapter ring away from the bracket one is fixedly connected to the bracket two. Ring molds are fixedly connected to both the upper and lower ports of the adapter ring. A plurality of meshes are provided on the side circumference of each ring mold. The inner diameters of the two ring molds are the same as the inner diameter of the adapter ring. End caps are detachably connected to the ends of the two ring molds away from the adapter ring. A feeding cover is rotatably installed on one side of the inside of each end cap. The two end caps are respectively fixedly connected to the upper and lower ends of the bracket one;

[0009] The conversion component further includes a sliding shaft. The two ends of the sliding shaft are respectively rotatably connected to the centers of the two end caps. A sliding sleeve is slidably fitted on the outside of the sliding shaft. Pressure rollers are rotatably connected to both sides of the sliding sleeve. A material guiding rod is symmetrically arranged on the outer surface of the sliding sleeve between the two pressure rollers. The inner ends of the two material guiding rods are respectively fixedly connected to the side surface of the sliding sleeve.

[0010] Further, the conversion component further includes a worm and worm gear reduction box. A hand wheel crank is fixedly installed at its input end, and its output end is fixedly connected to the bracket one. The worm and worm gear reduction box is fixedly installed at one end of the base correspondingly.

[0011] Further, a reduction motor is fixedly installed below the side of the bracket one away from the adapter ring. A sprocket one is fixedly installed at the driving end of the reduction motor. A sprocket two is fixedly installed at the bottom end of the sliding shaft. A chain is sleeved on both the sprocket one and the sprocket two.

[0012] Further, it also includes a scraping component, which includes two outer cylinders. The two outer cylinders are respectively sleeved on the outside of the two ring molds, and the two outer cylinders are concentrically arranged with the two ring molds and the adapter ring. The ends of the two outer cylinders away from the adapter ring are respectively rotatably connected to the two end caps. The ends of the two outer cylinders away from the end caps are respectively rotatably connected to the upper and lower ends of the adapter ring;

[0013] The scraping component further includes a double-shaft extension motor installed on one side of the middle of the adapter ring. One-way bearings are fixedly installed at the two driving ends of the double-shaft extension motor. A gear is fixedly installed on the outer ring of each one-way bearing. Tooth rings are meshed and connected to the sides of the two gears. The two tooth rings are respectively fixedly arranged on the outside of the ends of the two outer cylinders close to the adapter ring.

[0014] Further, a discharge cover is slidably fitted on the side of each outer cylinder away from the adapter ring. A scraping plate is fixedly connected to the inner wall of each outer cylinder.

[0015] Further, a flange observation window is fixedly installed on the side of each outer cylinder at the opposite side of the discharge cover.

[0016] Furthermore, it also includes a buffer assembly, which includes two rubber pads arranged above and below the sliding sleeve, the centers of the two rubber pads are respectively slidably matched with the upper and lower sides of the outer side of the sliding shaft, and the two rubber pads are fixedly installed with springs on one side close to the sliding sleeve, and the two springs are respectively sleeved on the outer side of the sliding shaft, and the ends of the two springs away from the rubber pads are respectively fixedly connected with the upper and lower ends of the sliding sleeve;

[0017] The outsides of the two rubber pads are fixedly installed with corrugated expansion sleeves, which are respectively sleeved on the outsides of the two springs, and the ends of the two corrugated expansion sleeves away from the rubber pads are respectively fixedly connected to the upper and lower ends of the sliding sleeve.

[0018] Furthermore, a conveyor belt is fixedly installed below the base.

[0019] From the above, the characteristics and advantages of a small straw fuel pellet machine in the present invention are:

[0020] The pellet machine has ring dies with upper and lower apertures. By directly flipping and exchanging the positions of the upper and lower ring dies, the particle size of the pellets can be changed quickly and conveniently. This solves the problem in the prior art that the pellet machine usually only encapsulates a mold with a single aperture inside it, which leads to inconvenience in disassembling and replacing the ring die, and is not conducive to rapid conversion of the pellet size. The limitations of its use have been reduced to a certain extent, and the effect that can be easily obtained is that, compared with the prior art, if the upper and lower ring dies have the same aperture, the two can back up each other, which can not only cope with the emergency situation of one of them being damaged, but also effectively extend the overall service life of the pellet machine during the continuous wear of the ring die, and effectively achieve the purpose of continuity in the processing of biomass dense molding fuel.

[0021] The pellet machine is directly driven by a worm gear reducer, which allows the pellet machine to flip 180 degrees as a whole. When flipping, the ring die automatically exchanges its upper and lower positions, and the pressure roller automatically falls into the ring die at the bottom along the sliding axis due to its own gravity. Compared with the existing ring die flipping technology, it solves the problem of its relatively delicate and complicated structure, and does not require close cooperation and participation between multiple electrical equipment, making the processing and manufacturing of biomass dense molded fuel less difficult and less costly, with a simpler structure and easier maintenance.

[0022] When the upper and lower ring dies are switched, due to the large mass of the pressure roller, if it directly hits the end cover along the sliding shaft, the structure will be damaged, which is not conducive to long-term use. The rubber pad contacts the end cover in advance, and then through the deformation of the rubber pad and the spring, the above impact is buffered, which solves the problem of easy damage to the structure by impact, which is beneficial to maintaining the service life of the structure. At the same time, when the rubber pad slides on the sliding shaft, it can also clean the dust accumulated in the keyway of the sliding shaft, alleviating the influence of dust on the precision matching mechanism in the prior art, thereby maintaining the stability of the conversion function and achieving the effect of extending the service life.

[0023] This granulator uses a double-extended motor in cooperation with a one-way bearing, and finally achieves that by controlling the forward and reverse rotation of the double-extended motor, only the outer cylinder at the lower part and the scraper installed inside it rotate, while the outer cylinder at the upper part remains undriven. In this way, the outer cylinder at the upper part will not rotate meaninglessly, reducing the load on the double-extended motor, and finally achieving the effect of reducing energy consumption, being more energy-saving and environmentally friendly, and solving the problem of separate driving of the outer cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure shown in the present invention;

[0025] Figure 2 It is an assembly schematic diagram of the ring die structure shown in the present invention;

[0026] Figure 3 is Figure 2 a schematic diagram of the structure after removing the ring die structure in

[0027] Figure 4 is Figure 3 a disassembly schematic diagram of the structure in

[0028] Figure 5 It is an assembly schematic diagram of the slip sleeve, the feeding rod and the pressure roller shown in the present invention;

[0029] Figure 6 It is a cooperation schematic diagram of the scraping component and the ring die shown in the present invention;

[0030] Figure 7 is Figure 6 another perspective schematic diagram of the structure in

[0031] Figure 8 It is a schematic diagram of the discharging cover in the open state shown in the present invention;

[0032] Figure 9 It is an assembly schematic diagram of the buffer component, the slip shaft and the slip sleeve shown in the present invention;

[0033] Figure 10 is Figure 9 a disassembly schematic diagram of part of the structure in

[0034] Among them, the reference numerals in the present invention are:

[0035] 11, base; 12, conveyor belt;

[0036] Conversion component: 21, support one; 22, support two; 23, worm and worm gear speed reducer; 24, connecting ring; 25, end cover; 251, feeding cover; 26, ring die; 261, mesh; 27, slip shaft; 28, slip sleeve; 281, feeding rod; 29, pressure roller;

[0037] 31. Reduction motor; 32. Sprocket one; 33. Sprocket two; 34. Chain;

[0038] Scraping component: 41. Outer cylinder; 42. Tooth ring; 43. Double-shaft extension motor; 44. One-way bearing; 45. Gear; 46. Discharge cover; 47. Scraper; 48. Flange observation window;

[0039] Buffer component: 51. Rubber pad; 52. Spring; 53. Corrugated telescopic sleeve. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Refer to Figures 1-10 As shown, it is an embodiment of the present invention, and a small straw fuel granulator provided will be elaborated in detail below:

[0042] A small straw fuel granulator includes a base 11, and a conveyor belt 12 is fixedly installed below the base 11 for conveying the processed particles.

[0043] Refer to Figures 2-4 As shown, it further includes a conversion component. The main purpose of the conversion component is to solve the problem in the existing granulator that the mold with a single mesh aperture is inconvenient to disassemble, replace, and is not conducive to quickly converting the granulation particle size, and narrow its usage limitations. The conversion component includes a bracket one 21 rotatably connected to one side of the base 11, a bracket two 22 rotatably connected to the other side of the base 11, and an adapter ring 24 fixedly connected to the middle of the bracket one 21. The bracket one 21 and the bracket two 22 are arranged on opposite sides. The middle of the side of the adapter ring 24 away from the bracket one 21 is fixedly connected to the bracket two 22. Ring molds 26 are fixedly connected to both the upper and lower ports of the adapter ring 24. A plurality of mesh holes 261 are provided on the side circumference of each ring mold 26. The inner diameters of the two ring molds 26 are the same as the inner diameter of the adapter ring 24. One end of each ring mold 26 away from the adapter ring 24 is detachably connected with an end cover 25, and the ring mold 26 and the end cover 25 are detachably connected by bolts and nuts. A feeding cover 251 is rotatably installed on one side inside each end cover 25. The two end covers 25 are respectively fixedly connected to the upper and lower ends of the bracket one 21.

[0044] Refer to Figures 3-5As shown in the figure, the conversion component further includes a sliding shaft 27. The two ends of the sliding shaft 27 are respectively rotatably connected to the centers of the two end caps 25. A sliding sleeve 28 is slidably fitted on the outside of the sliding shaft 27. Pressing rollers 29 are rotatably connected to both sides of the sliding sleeve 28. Moreover, strip-shaped grooves are equidistantly formed on the outer surface of the sliding shaft 27, and the strip-shaped grooves are adapted to the sliding notch in the middle of the sliding sleeve 28, and the strip-shaped grooves and the sliding sleeve 28 form a limiting sliding fit. A material pushing rod 281 is symmetrically arranged on the outer surface of the sliding sleeve 28 between the two pressing rollers 29, and the inner ends of the two material pushing rods 281 are respectively fixedly connected to the side surface of the sliding sleeve 28.

[0045] Through the above-mentioned support one 21, the ring die 26, the outer cylinder 41, etc. between the upper and lower parts are rotated 180 degrees as a whole to exchange positions. At this time, the upper and lower ends of the sliding shaft 27 are also exchanged positions. During the deflection process of the sliding shaft 27, under the action of its own gravity with the pressing roller 29, etc., the sliding sleeve 28 automatically slides along the sliding shaft 27 towards its lower position. In this way, the sliding sleeve 28, the pressing roller 29 and the material pushing rod 281 will all automatically transfer to another ring die 26, achieving the effect of rapid conversion of work between different ring dies 26, and the structure is simple and easy to implement, with practicability.

[0046] In addition, in this granulator, when a ring die 26 is in the upper position, since the upper and lower ring dies 26 are in a communicating state, the upper ring die 26 will automatically act as the position of the feed hopper in the existing granulator. During use, the raw material enters the upper ring die 26 through the feeding cover 251, and then falls into the lower ring die 26, so that feeding can be realized. In this way, there is no need to additionally install a feed hopper above this granulator, which is beneficial to the miniaturization of the equipment.

[0047] Refer to Figure 1 As shown in the figure, the conversion component further includes a worm and worm gear reduction box 23. A handwheel crank is fixedly installed at its input end, and its output end is fixedly connected to the support one 21. The worm and worm gear reduction box 23 is fixedly installed at one end of the base 11 correspondingly.

[0048] In this embodiment, the worm and worm gear reduction box 23 adopts the existing technology. Its input part is a worm, and its output part is a worm gear, and the two are meshed and connected. By rotating the worm, the worm gear can be driven to rotate.

[0049] The worker rotates the handwheel crank, and through the transmission of the worm and worm gear reduction box 23, the rotational torque can be transmitted to the support one 21, and then drive the support one 21 to rotate. The support one 21 drives the connecting ring 24 to rotate through the supporting cooperation of the support two 22 until the connecting ring 24, the ring die 26 and the sliding shaft 27 are rotated to the vertical state. Due to the self-locking structural characteristics of the worm and worm gear, the above-mentioned vertical state is kept stable, realizing the rapid conversion between the upper and lower ring dies 26.

[0050] Refer toFigures 2-4 As shown, a reduction motor 31 is fixedly installed below one side of the first support 21 away from the connection ring 24. A first sprocket 32 is fixedly installed at the driving end of the reduction motor 31. A second sprocket 33 is fixedly installed at the bottom end of the sliding shaft 27, and the strip-shaped groove on the sliding shaft 27 is inserted and adapted to the connection end of the second sprocket 33. The purpose of starting the second sprocket 33 to drive the sliding shaft 27 is that a chain 34 is sleeved on both the first sprocket 32 and the second sprocket 33, and the first sprocket 32 drives the second sprocket 33 through a chain 34.

[0051] Refer to Figure 1 and Figures 6-8 As shown, it further includes a scraping component, which includes two outer cylinders 41. The two outer cylinders 41 are respectively sleeved outside the two ring dies 26, and the two outer cylinders 41, the two ring dies 26 and the connection ring 24 are concentrically arranged. One ends of the two outer cylinders 41 away from the connection ring 24 are respectively rotatably connected to the two end covers 25, and one ends of the two outer cylinders 41 away from the end covers 25 are respectively rotatably connected to the upper and lower ends of the connection ring 24.

[0052] Furthermore, the scraping component further includes a double-shaft extension motor 43 installed on one side of the middle of the connection ring 24. One-way bearings 44 are fixedly installed at both driving ends of the double-shaft extension motor 43. A gear 45 is fixedly installed on the outer ring of each one-way bearing 44. A toothed ring 42 is meshed and connected to the side of each of the two gears 45, and the two toothed rings 42 are respectively fixedly installed on the outside of one ends of the two outer cylinders 41 close to the connection ring 24.

[0053] A discharge cover 46 is slidably fitted to the side of one end of each outer cylinder 41 away from the connection ring 24. A scraping plate 47 is fixedly connected to the inner wall of each outer cylinder 41, and the two one-way bearings 44 are installed on the two shafts of the double-shaft extension motor 43 in opposite rotation directions.

[0054] Among them, when the double-shaft extension motor 43 rotates forward, only one of the one-way bearings 44 can drive the gear 45 outside it to rotate. When the double-shaft extension motor 43 rotates in reverse, only the other one-way bearing 44 can drive the gear 45 outside it to rotate. The ultimate purpose to be achieved above is that by controlling the forward and reverse rotation of the double-shaft extension motor 43, only the outer cylinder 41 at the lower part and the scraping plate 47 installed thereon rotate, and the outer cylinder 41 at the upper part remains undriven. In this way, the load of the double-shaft extension motor 43 can be reduced, and finally the effect of reducing energy consumption can be achieved, which is more energy-saving and environment-friendly.

[0055] In this embodiment, the granulator further includes a control panel, and the control panel is used to control the use of each motor and the conveyor belt 12. The above-mentioned circuit conduction and signal control are all existing mature technologies, and will not be elaborated here too much.

[0056] Refer to Figure 6As shown, a flange observation window 48 is fixedly installed on the side of each outer cylinder 41 opposite to the discharge cover 46, facilitating the observation of the granulation process.

[0057] Refer to Figures 9-10 As shown, it further includes a buffer assembly, which includes two rubber pads 51 arranged above and below the sliding sleeve 28. The centers of the two rubber pads 51 are respectively slidably fitted on the upper and lower sides of the outer part of the sliding shaft 27, and the two rubber pads 51 are close to the upper and lower sides of the sliding sleeve 28. A spring 52 is fixedly installed on one side of each of the two rubber pads 51 close to the sliding sleeve 28. The two springs 52 are respectively sleeved on the outer part of the sliding shaft 27, and the ends of the two springs 52 away from the rubber pads 51 are respectively fixedly connected to the upper and lower ends of the sliding sleeve 28.

[0058] Corrugated expansion sleeves 53 are fixedly installed on the outer parts of the two rubber pads 51. The two corrugated expansion sleeves 53 are respectively sleeved on the outer parts of the two springs 52, and the ends of the two corrugated expansion sleeves 53 away from the rubber pads 51 are respectively fixedly connected to the upper and lower ends of the sliding sleeve 28.

[0059] In this embodiment, when the sliding sleeve 28 slides towards the lowest end of the sliding shaft 27, its gravitational potential energy is converted into kinetic energy. Due to the large mass of the pressure roller 29, the impact force of the sliding sleeve 28 hitting the end cover 25 is large, which easily damages the structure. Thus, the rubber pad 51 contacts the end cover 25 in advance, and then through its and the spring 52's effect when being deformed by the extrusion of the sliding sleeve 28, the above impact is buffered, which is beneficial to maintaining the service life of the structure. At the same time, when the rubber pad 51 slides on the sliding shaft 27, it can also clean the dust accumulated in the keyway of the sliding shaft 27, ensuring the smoothness of the free sliding of the sliding sleeve 28. Similarly, the purpose of the corrugated expansion sleeve 53 on the outside is also to isolate dust.

[0060] Combined with the above embodiments, the following is the entire working process and working principle of the above embodiments:

[0061] The working state is: The worker rotates the handwheel crank, and through the transmission of the worm and worm gear reduction box 23, the rotational torque is transmitted to the first support 21, thereby driving the first support 21 to rotate. The first support 21 drives the connection ring 24 to rotate through the supporting cooperation of the second support 22 until the connection ring 24, the ring die 26, the outer cylinder 41, and the sliding shaft 27 are rotated to the vertical state. Due to the self-locking structural characteristics of the worm and worm gear, the above vertical state is kept stable.

[0062] Through the control panel instruction, the reduction motor 31 works, thereby driving the first sprocket 32 to rotate. Through the chain 34 transmission, the second sprocket 33 is driven, and finally the sliding shaft 27 rotates. Since the sliding shaft 27 is a spline shaft, the sliding sleeve 28 engaged with it is driven to rotate, and finally the pressure roller 29 revolves around the sliding shaft 27 as the center.

[0063] Similarly, the double-extended motor 43 is operated through the control panel instructions. At this time, under the action of the upper one-way bearing 44 on its upper driving end, the gear 45 above cannot be driven to rotate. Instead, under the action of the lower one-way bearing 44 on its lower driving end, the gear 45 below is driven to rotate. Thus, through the transmission of the engaged tooth ring 42, only the lower outer cylinder 41 rotates, and drives the scraper 47 installed on its inner wall to rotate along the outer surface of the corresponding ring die 26.

[0064] Then, the upper feeding cover 251 is opened, and the crushed straw is put in. The straw fragments then fall into the lower ring die 26 through the upper ring die 26. Since the pressure roller 29 continuously rolls on the inner surface of the lower ring die 26, the straw fragments are pressed into the mesh holes 261. Under the shaping of the inner holes of the mesh holes 261, slender columnar materials are finally formed. When continuously extruding the straw fragments into the mesh holes 261, the formed columnar materials are slowly extruded outwards. Furthermore, under the scraping action of the scraper 47 that continuously rotates along the outer surface of the ring die 26, the columnar materials are cut into granular form. The cut particles fall into the annular gap between the end cover 25, the ring die 26, the connecting ring 24, and the outer cylinder 41. Since the width of the scraper 47 is the same as that of the above annular gap, finally, during the gradual accumulation process, it is scraped by the scraper 47 and discharged from the opened discharge cover 46. The discharged particles finally fall into the lower conveyor belt 12. At this time, by controlling the operation of the conveyor belt 12 through the control panel, the particles can be output.

[0065] During the granulation process, the shifting sleeve 28 drives the material stirring rod 281 to rotate synchronously, so that the straw fragments can be continuously loosened, avoiding the problem of material accumulation and further causing the problem of poor operation of the pressure roller 29. At the same time, the material stirring rod 281 can intercept the material between the pressure roller 29 and the material stirring rod 281, avoiding the problem of material leakage.

[0066] When it is necessary to switch to working with the upper ring die 26, repeat the above operation steps. Rotate the ring die 26, outer cylinder 41, etc. between the upper and lower parts as a whole by 180 degrees through the first support 21. At this time, the upper and lower ends of the sliding shaft 27 also swap positions. During the deflection of the sliding shaft 27, under the action of its own gravity with the pressure roller 29, etc., the sliding sleeve 28 automatically slides along the sliding shaft 27 towards its lower position. In this way, the sliding sleeve 28, pressure roller 29, and the material pushing rod 281 will all automatically transfer to the other ring die 26. When the sliding sleeve 28 slides to the bottom end of the sliding shaft 27, due to the conversion of gravitational potential energy into kinetic energy, the sliding sleeve 28 rapidly impacts the end cover 25. Since the mass of the pressure roller 29 is large, direct impact will surely damage the structure and is not conducive to long-term use. Thus, when the sliding sleeve 28 slides towards the bottom end of the sliding shaft 27, it first contacts the end cover 25 through the rubber pad 51. Then, under the action of its deformation when being squeezed by the spring 52, the above impact is buffered, which is beneficial to maintaining the service life of the structure. At the same time, when the rubber pad 51 slides on the sliding shaft 27, it can also be used as a cleaning tool, preventing the dust accumulated in the keyway of the sliding shaft 27 from entering between the sliding sleeve 28 and the sliding shaft 27, thereby maintaining the use stability of the above conversion function. Similarly, the purpose of the corrugated expansion sleeve 53 on the outside is also to isolate dust, etc. from entering between the sliding sleeve 28 and the sliding shaft 27, as well as between the rubber pad 51 and the spring 52. At the same time, the impact on the end cover 25 can vibrate and drop the material powder adhering to the surface of the end cover 25.

[0067] After the above structure conversion is stable, open the feeding cover 251 and the discharge cover 46 below, so that the inside of the lower ring die 26 and the outer cylinder 41 can be cleaned. Finally, operate again according to the above particle preparation method, and the effect of quickly switching to use the other ring die 26 can be achieved. Naturally, it is easy to think that by setting the pore diameters of the mesh holes 261 on the two ring dies 26 to be inconsistent, the rapid conversion of the process of preparing two kinds of particle sizes can be realized.

[0068] Among them, it should be noted that after the above position conversion, at this time, the double-shaft extension motor 43 should be commanded to rotate in the reverse direction through the control panel. In this way, the following purpose can still be achieved, that is, its upper driving end cannot drive the upper gear 45 to rotate under the action of the upper one-way bearing 44, but the lower driving end drives the lower gear 45 to rotate under the action of the lower one-way bearing 44. Thus, through the transmission of the gear ring 42 meshing with it, only the lower outer cylinder 41 rotates, and drives the scraper 47 installed on its inner wall to rotate along the outer surface of the corresponding ring die 26.

[0069] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element limited by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0070] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill 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 present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small straw fuel pellet machine, comprising a base (11), characterized in that: It also includes a conversion assembly, which includes a bracket 1 (21) rotatably connected to one side of the base (11), a bracket 2 (22) rotatably connected to the other side of the base (11), and a connecting ring (24) fixedly connected to the middle of the bracket 1 (21), the connecting ring (24) is fixedly connected to the bracket 2 (22) at the middle of the side away from the bracket 1 (21), the upper and lower ends of the connecting ring (24) are fixedly connected to ring dies (26), a plurality of meshes (261) are opened around the side of each ring die (26), the inner diameters of the two ring dies (26) are consistent with the inner diameter of the connecting ring (24), the ends of the two ring dies (26) away from the connecting ring (24) are detachably connected to end covers (25), a feeding cover (251) is rotatably installed on the inner side of each end cover (25), and the two end covers (25) are fixedly connected to the upper and lower ends of the bracket 1 (21) respectively; The conversion assembly further comprises a sliding shaft (27), the two ends of the sliding shaft (27) being rotatably connected to the centers of the two end covers (25) respectively, the outside of the sliding shaft (27) being slidably matched with a sliding sleeve (28), both sides of the sliding sleeve (28) being rotatably connected with pressure rollers (29), a material shifting rod (281) being symmetrically provided on the outer surface of the sliding sleeve (28) between the two pressure rollers (29), and the inner ends of the two material shifting rods (281) being fixedly connected to the side surfaces of the sliding sleeve (28) respectively.

2. A small straw fuel pellet machine according to claim 1, characterized in that: The conversion assembly also includes a worm gear reduction box (23), an input end of which is fixedly mounted with a hand wheel crank, and an output end of which is fixedly connected to the first bracket (21), and the worm gear reduction box (23) is correspondingly fixedly mounted on one end of the base (11).

3. A small straw fuel pellet machine according to claim 2, characterized in that: A reduction motor (31) is fixedly mounted below one side of the bracket (21) away from the connecting ring (24), a sprocket wheel (32) is fixedly mounted on the driving end of the reduction motor (31), a sprocket wheel (33) is fixedly mounted on the bottom end of the sliding shaft (27), and a chain (34) is sleeved on the sprocket wheel (32) and the sprocket wheel (33).

4. A small straw fuel pellet machine according to claim 3, characterized in that: It also includes a scraper assembly, which includes two outer cylinders (41), the two outer cylinders (41) are respectively sleeved on the outside of the two ring dies (26), and the two outer cylinders (41) are concentrically arranged with the two ring dies (26) and the connecting ring (24), and the ends of the two outer cylinders (41) away from the connecting ring (24) are respectively rotatably connected to the two end covers (25), and the ends of the two outer cylinders (41) away from the end covers (25) are respectively rotatably connected to the upper and lower ends of the connecting ring (24); The scraper assembly also includes a double-axle extension motor (43) mounted on one side of the middle of the connecting ring (24), one-way bearings (44) being fixedly mounted on both driving ends of the double-axle extension motor (43), a gear (45) being fixedly mounted on the outer ring of each one-way bearing (44), the side surfaces of the two gears (45) being meshedly connected to a gear ring (42), and the two gear rings (42) being respectively fixed to the outside of one end of the two outer cylinders (41) close to the connecting ring (24).

5. A small straw fuel pellet machine according to claim 4, characterized in that: A discharge cover (46) is slidably fitted on the side surface of one end of each outer cylinder (41) away from the connecting ring (24), and a scraper (47) is fixedly connected to the inner wall of each outer cylinder (41).

6. A small straw fuel pellet machine according to claim 5, characterized in that: A flange observation window (48) is fixedly mounted on the side of each outer cylinder (41) at the opposite side of the discharge cover (46).

7. A small straw fuel pellet machine according to claim 6, characterized in that: It also includes a buffer assembly, which includes two rubber pads (51) arranged above and below the sliding sleeve (28), the centers of the two rubber pads (51) are respectively slidably matched on the upper and lower sides of the outside of the sliding shaft (27), and springs (52) are fixedly installed on the sides of the two rubber pads (51) close to the sliding sleeve (28), the two springs (52) are respectively sleeved on the outside of the sliding shaft (27), and the ends of the two springs (52) away from the rubber pads (51) are respectively fixedly connected to the upper and lower ends of the sliding sleeve (28); The two rubber pads (51) are both fixedly mounted with bellows expansion sleeves (53) on their exteriors. The two bellows expansion sleeves (53) are respectively sleeved on the exteriors of the two springs (52). The ends of the two bellows expansion sleeves (53) away from the rubber pads (51) are respectively fixedly connected to the upper and lower ends of the sliding sleeve (28).

8. The small straw fuel pellet machine according to claim 7, characterized in that: A conveyor belt (12) is fixedly installed below the base (11).

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