Internal discharging type double-roller gear granulator

Abstract

The invention belongs to the technical field of powder raw material granulation mechanical equipment, and particularly relates to an internal discharging type double-roller gear granulator which comprises a double-roller mechanism and a discharging mechanism, the double-roller mechanism comprises hollow gear rollers and a die hole, the two hollow gear rollers are horizontally arranged side by side and meshed with each other, and the die hole penetrates through the bottom of a meshing groove of the hollow gear rollers; the two ends of the hollow gear roller are rotationally connected to the two ends of the discharging mechanism in a sleeving mode, the middle of the hollow gear roller is arranged close to the inner wall of the hollow gear roller, and when the hollow gear roller rotates, materials thrown into the meshing part from the upper portion can be extruded and enter the hollow gear roller after being formed through a die hole in the bottom of a meshing groove; molding materials on the die holes are scraped into finished particles and discharged to the outside from the end of the hollow gear roller, the materials do not need to be smashed after being formed, and the yield can be increased. The unloading mechanism comprises a granule receiving barrel, a first granule scraping knife and a discharging mechanism, finished granules can be conveyed to the outside of the hollow gear roller from the end part of the granule receiving barrel, and the discharging efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of powder raw material granulation machinery and equipment, and in particular relates to an internal discharge type roller gear granulator. Background Art

[0002] Granulator is a device that extrude powdered materials into granules, and is mostly used in the feed industry and fertilizer industry. The commonly used double-roll extrusion granulator at home and abroad is to put the mixed raw materials into the double-roll granulation mechanism, and after being rolled into granules by the hemispherical die holes on the double rollers, further break them up and screen out the granules of the required size.

[0003] The patent document with publication number CN220443776U discloses a double-roller extrusion granulator, which makes the finished material higher quality by cleaning the material adhering to the granulation shaft and sorting the finished material and the residue, and the residue can be processed again, thereby reducing waste; it includes a granulation mechanism; it also includes a scattering mechanism, a driving mechanism, a transmission mechanism and a filtering mechanism, the scattering mechanism is installed at the lower end of the granulation mechanism, the driving mechanism is installed at the right end of the scattering mechanism, the transmission mechanism is installed at the rear end of the granulation mechanism, and the filtering mechanism is installed at the front end of the scattering mechanism; the granulation mechanism forms the material into plates, the scattering mechanism breaks the plated material into particles, the driving mechanism drives the scattering mechanism, the transmission mechanism cooperates with the driving mechanism to drive the granulation mechanism, and the filtering mechanism sorts the finished product.

[0004] However, different materials have different bite angles, and the gap between the rollers of the above-mentioned granulator cannot be adjusted at any time. It has high requirements for granulated materials and poor adaptability. The above-mentioned granulator first forms the material into plates, and then breaks and filters it. The crushing process is poorly controllable, and there are problems of insufficient crushing and damage to the finished product. The finished product rate after filtration is low. Summary of the invention

[0005] In view of the shortcomings of the prior art, the object of the present invention is to provide an internal discharge type roller gear granulator, which does not need to be broken after the material is formed, thereby improving the yield.

[0006] In order to solve the above technical problems, the present invention provides an internal discharge type roller gear granulator, comprising: frame; The roller mechanism comprises a hollow gear roller and a die hole, wherein the two hollow gear rollers are arranged horizontally side by side and meshed with each other, and both ends are rotatably connected to the frame respectively, and the die hole runs through the bottom of the meshing groove of the hollow gear roller; The unloading mechanism comprises two ends of the hollow gear roller which are rotatably sleeved on the two ends of the unloading mechanism, the ends of the unloading mechanism are fixedly connected to the frame, and the middle part is arranged close to the inner wall of the hollow gear roller, so as to scrape off the molding material extruded from the die hole and discharge it to the outside from the ends of the hollow gear roller.

[0007] Preferably, in the above scheme, the unloading mechanism includes a particle receiving barrel, a first particle scraper and a discharging mechanism, the first particle scraper is fixed above the particle receiving barrel and arranged close to the inner wall of the hollow gear roller, the two ends of the hollow gear roller are rotatably connected to the two ends of the particle receiving barrel, and the discharging structure is used to transport the molding material in the particle receiving barrel from the end to the outside.

[0008] Preferably, in the above scheme, the hollow gear roller includes a roller, a sleeve and a support plate, the sleeves are provided at both ends of the roller coaxially, the roller and the sleeve are fixedly connected through a plurality of support plates, and the inner wall of the sleeve is rotatably connected to the two ends of the particle receiving cylinder.

[0009] Preferably, in the above scheme, the discharging mechanism includes a screw and a second driving mechanism, the screw is arranged in the particle receiving barrel, and both ends thereof respectively pass through both ends of the particle receiving barrel, and the second driving mechanism is used to drive the screw to rotate.

[0010] Preferably, in the above scheme, the particle receiving cylinder includes an arc groove and a circular tube, the circular tubes are respectively provided at both ends of the arc groove, the hollow gear roller, the arc groove, the circular tube and the screw are arranged on a common center axis, and the two ends of the hollow gear roller can be rotatably sleeved on the circular tube.

[0011] Preferably, in the above scheme, the particle receiving barrel further comprises a baffle and a wing plate, the wing plates are respectively provided at both ends of the baffle, the first particle scraper is installed on the upper edge of the baffle, and the lower edge is connected to the edge of the arc groove close to the inner side of the roller mechanism.

[0012] Preferably, in the above scheme, the mold hole is set as a tapered hole, and the hole diameter gradually decreases from the outer wall to the inner wall of the hollow gear roller.

[0013] Preferably, in the above scheme, the outer end of the mold hole is set as a hexagonal hole, the inner end is set as a circular hole, and a plurality of the mold holes are distributed in a grid at the bottom of the meshing groove.

[0014] Preferably, in the above scheme, the die hole passes through the convex teeth of the hollow gear roller, and when the convex teeth are fully engaged with the meshing grooves, the position of the die hole on the convex teeth and the position of the die hole on the meshing grooves are staggered.

[0015] Preferably, in the above scheme, the unloading mechanism includes a transverse axis, a guide groove and a second scraper, the end of the transverse axis is fixedly connected to the frame, the two ends of the hollow gear roller are rotatably sleeved on the two ends of the transverse axis, the guide groove is arranged in a shape that is high in the middle and low at both ends, the end is arranged close to the end of the hollow gear roller, the inner edge is fixedly connected to the transverse axis, and the outer edge is arranged close to the inner wall below the meshing position of the two hollow gear rollers, and the second scraper is arranged on the outer edge of the guide groove.

[0016] Compared with the existing technology, the present invention has the following beneficial effects:

[0017] 1. An internal discharge type roller gear granulator in the present invention comprises a roller mechanism and a discharge mechanism, wherein the roller mechanism comprises a hollow gear roller and a die hole, wherein the two hollow gear rollers are arranged horizontally side by side and meshed with each other, and can extrude the material thrown into the meshing position from above when rotating, and the material enters the hollow gear roller after being formed through the die hole at the bottom of the meshing groove, and when the formed material on the die hole rotates to contact with the middle of the discharge mechanism, the formed material is scraped into finished particles and discharged from the end of the hollow gear roller to the outside, and the material does not need to be broken after being formed, which can improve the yield rate.

[0018] 2. The unloading mechanism in the present invention includes a particle receiving barrel, a first particle scraper and a discharging mechanism. When the molding material on the die hole rotates to the top of the particle receiving barrel, the molding material is scraped into the particle receiving barrel by the first particle scraper. The finished particles in the particle receiving barrel are transported from the end to the outside of the hollow gear roller through the discharging structure, which can improve the discharge efficiency of the finished particles and realize the function of rapid unloading from the inside of the granulator.

[0019] 3. The hollow gear roller in the present invention includes a roller, a sleeve and a support plate. The two ends of the roller are respectively provided with sleeves coaxially, the roller and the sleeve are fixedly connected by a plurality of support plates, the inner wall of the sleeve is slidably connected to the two ends of the particle receiving cylinder, the roller can have good stability when rotating, and the longer the roller, the higher the granulation efficiency, and the roller can be replaced according to the molding requirements of different materials.

[0020] 4. The particle receiving barrel in the present invention comprises an arc groove, a round tube, a baffle and a wing plate, and the baffle and the wing plate can prevent the scraped finished particles from falling outside the arc groove.

[0021] 5. The die hole in the present invention is set as a tapered hole, and the hole diameter gradually decreases from the outer wall to the inner wall of the hollow gear roller. The design of the tapered hole can eliminate the resistance of the die hole, making the pressing process of the particles smoother, reducing waste heat and plate hole wear, and ensuring the efficiency and quality of particle processing.

[0022] 6. The present invention sets hexagonal mold holes, and multiple mold holes are distributed in a grid at the bottom of the meshing groove. The honeycomb structure formed by the hexagonal holes can most effectively fill the plane in two-dimensional space and make full use of the effective area of ​​the bottom of the meshing groove.

[0023] 7. The present invention can avoid insufficient structural strength of the hollow gear roller due to too dense holes in the meshing groove while ensuring the number of holes by staggeredly arranging mold holes on the convex teeth and the meshing groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram from the first perspective of an internal discharge type double-roll gear granulator according to Example 1.

[0025] Figure 2 This is a schematic structural diagram from a second perspective of an internal discharge type roller gear granulator according to Example 1.

[0026] Figure 3 This is a schematic diagram of the installation structure of the roller mechanism of Example 1.

[0027] Figure 4 This is a schematic diagram of the installation structure of the discharge mechanism of Example 1.

[0028] Figure 5 It is a schematic structural diagram of the hollow gear roller of the first embodiment.

[0029] Figure 6 It is a schematic structural diagram of the particle receiving barrel of the first embodiment.

[0030] Figure 7 This is a partial enlarged view of A of the hollow gear roller in Example 1.

[0031] Figure 8 This is a schematic diagram of the mold hole position distribution structure of Example 1.

[0032] Fig. 9 It is a structural schematic diagram of the unloading mechanism of the second embodiment.

[0033] Among them, 1-a pair of rollers, 11-a hollow gear roller, 111-an engaging groove, 112-a roller, 113-a bushing, 114-a support plate, 115-a convex tooth, 12-a mold hole, 121-a hexagonal hole, 122-a round hole, 13-a first driving mechanism; 2-a discharging mechanism, 21-a particle receiving cylinder, 211-an arc groove, 212-a round tube, 213-a baffle, 214-a wing plate, 215-a clamping block, 22-a first particle scraper, 221-a base, 23-a discharging mechanism, 231-a screw, 232-a second driving mechanism, 24-a horizontal axis, 25-a guide groove, 26-a second particle scraper, 3-a feeding bin, 4-a filtering structure, 41-a filter screen, 42-a guide groove, 43-a collecting port, 5-a recovery bin, 6-a frame, and 61-a clamping slot. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of the embodiments of the present invention based on its overall structure.

[0038] Embodiment 1: Figure 1-4As shown, this embodiment discloses an internal discharge type double-roll gear granulator, including a frame 6, a double-roll mechanism 1 and a discharge mechanism 2. The double-roll mechanism 1 includes a hollow gear roller 11 and a die hole 12. The two hollow gear rollers 11 are arranged horizontally side by side and meshed with each other. The die hole 12 runs through the bottom of the meshing groove 111 of the hollow gear roller 11. The two ends of the hollow gear roller 11 are rotatably sleeved on the two ends of the discharge mechanism 2. The end of the discharge mechanism 2 is fixedly connected to the frame 6, and the middle part is arranged close to the inner wall of the hollow gear roller 11, which is used to scrape off the molding material extruded from the die hole 12 and discharge it from the end of the hollow gear roller 11 to the outside. When this embodiment is in use, the hollow gear roller 11 on the left rotates clockwise, and the hollow gear roller 11 on the right rotates counterclockwise, which can squeeze the material entering from the top of the meshing part into the die hole 12. The material is formed through the die hole 12 and then extruded from the inside of the hollow gear roller 11. When the formed material on the die hole 12 rotates to contact the middle of the discharge mechanism 2, the formed material is scraped into finished particles and discharged from the end of the hollow gear roller 11 to the outside. The material does not need to be broken after being formed, which can improve the yield rate. In addition, the two ends of the hollow gear roller 11 can be rotatably sleeved on the two ends of the discharge mechanism 2, which can improve the support force of the hollow gear roller 11 and have good stability when using a longer hollow gear roller 11.

[0039] Furthermore, the unloading mechanism 2 in this embodiment includes a particle receiving barrel 21, a first particle scraper 22 and a discharging mechanism 23. The first particle scraper 22 is fixed above the particle receiving barrel 21 and is arranged close to the inner wall of the hollow gear roller 11. The two ends of the hollow gear roller 11 are rotatably sleeved on the two ends of the particle receiving barrel 21. The discharging structure 23 is used to transport the molding material in the particle receiving barrel 21 from the end to the outside. The end of the particle receiving barrel 21 in this embodiment is fixedly connected to the frame 6. The two ends of the first particle scraper 22 extend to the outside of the two end mold holes 12 of the hollow gear roller 11. When the molding material on the mold hole 12 rotates to the top of the particle receiving barrel 21, the molding material is scraped into the particle receiving barrel 21 by the first particle scraper 22. The finished particles in the particle receiving barrel 21 are transported from the end to the outside of the hollow gear roller 11 through the discharging structure 23, which can improve the discharge efficiency of the finished particles.

[0040] Continue to refer Figure 5 The hollow gear roller 11 in this embodiment includes a roller 112, a sleeve 113 and a support plate 114. The two ends of the roller 113 are respectively provided with sleeves 113 coaxially. The roller 112 and the sleeve 113 are fixedly connected by a plurality of support plates 114. The inner wall of the sleeve 113 is rotatably connected to the two ends of the particle receiving cylinder 21.

[0041] Specifically, the gear structure on the surface of the roller 112 is set to an involute gear structure, and the specific size can be designed according to the molding requirements of different materials. The thickness of the roller 112 determines the solidification degree of the finished particles, and the depth of the meshing groove 111 determines the length of the finished particles. One end of the multiple support plates 114 is arranged at one end of the sleeve 113 in a circumferential array, and the other end of the multiple support plates 114 is detachably connected to the end face of the roller 112 by bolts, so that the roller 112 can be replaced according to the specification requirements of the finished particles. The material inside the roller 112 can be discharged through the gap between the multiple support plates 114. It is worth noting that the sleeve 113 in this embodiment can be installed on the frame 6 through a bearing, which can play a better role in stabilizing the support. The various components of the hollow gear roller 11 should be made of wear-resistant materials, such as high-chromium alloy steel, stainless steel, etc., to improve the durability of the equipment.

[0042] In addition, the roller mechanism 1 further includes a first driving mechanism 13, which is used to drive the two hollow gear rollers 11 to rotate. Preferably, the first driving mechanism 13 is arranged outside one end of the hollow gear roller 11, and the hollow gear roller 11 can be driven to rotate by a motor and belt drive or a gear drive. In this embodiment, a belt drive method is adopted, a driving pulley is installed at the output end of the motor, and a driven pulley is installed at the end of the sleeve 113, and the driving pulley and the driven pulley are connected by a belt rotation. Belt drive is a very mature transmission technology, which has a simple structure, is easy to install, and has low cost.

[0043] Continue to refer Figure 4 The discharging mechanism 23 in this embodiment includes a screw 231 and a second driving mechanism 232. The screw 231 is arranged in the particle receiving barrel 21, and its two ends respectively penetrate through the two ends of the particle receiving barrel 21. The second driving mechanism 232 is used to drive the screw 231 to rotate. Specifically, the first driving mechanism 13 and the second driving mechanism 232 are arranged on the same side of the roller mechanism 1. The second driving mechanism 232 drives the two screws 231 to rotate in the same direction at the same time by means of belt transmission or gear transmission. In this embodiment, a belt transmission method is adopted. A driving pulley is installed at the output end of the motor, and a driven pulley is installed at one end of the two screws 231. The driving pulley and the two driven pulleys are respectively connected by belt rotation. The two screws 231 rotate in the same direction to output the finished particles in the particle receiving barrel 21 from the side away from the second driving mechanism 232.

[0044] Continue to refer Figure 6The particle receiving barrel 21 in this embodiment includes a circular arc groove 211 and a circular tube 212. The circular tubes 212 are respectively provided at both ends of the circular arc groove 211. The hollow gear roller 11, the circular arc groove 211, the circular tube 212 and the screw 231 are arranged on the same central axis. The two ends of the hollow gear roller 11 are rotatably sleeved on the circular tube 212. Further, the particle receiving barrel 21 also includes a baffle 213 and a wing plate 214. The two ends of the baffle 213 are respectively provided with wing plates 214. The upper edge of the baffle 213 is installed with a first particle scraper 22, and the lower edge is connected to the edge of the circular arc groove 211 close to the inner side of the roller mechanism 1. Specifically, the upper edge of the baffle 213 is arranged directly above the opening of the arc groove 211, and the scraper 22 is detachably mounted on the upper edge of the baffle 213, which is convenient for disassembling and replacing the scraper 22. The blade of the scraper 22 faces the direction in which the hollow gear roller 11 rotates and approaches, and the baffle 213 is gradually inclined from bottom to top in the direction in which the hollow gear roller 11 rotates and approaches, which can prevent the molding material from being rebounded to the outside of the arc groove 211 by the baffle 213 due to inertial movement after being scraped. The fan-shaped wing plates 214 are vertically arranged at both ends of the baffle 213, which can prevent the scraped finished particles from splashing out from both ends of the arc groove 211. The circular tube 212 is fixedly connected to the frame 6, and both ends of the screw 231 pass through the circular tube 212. When rotating, the finished particles inside the arc groove 211 can be transported to the outside of the circular tube 212 port away from the second driving mechanism 232.

[0045] It can be understood that the outer end of the sleeve 113 is rotatably mounted on the frame 6, the outer end of the circular tube 212 extends to the outside of the sleeve 113, and the outer end of the circular tube 212 away from the second driving mechanism 232 is provided with a clamping block 215, and the frame 6 is provided with a clamping groove 61 adapted to the clamping block 215, so that the circular tube 212 can be quickly installed and fixed on the frame 6 to avoid deviation in the installation position of the grain receiving barrel 21.

[0046] Continue to refer Figure 5 The die hole 12 in this embodiment is set as a tapered hole, and the hole diameter gradually decreases from the outer wall to the inner wall of the hollow gear roller 11. The design of the tapered hole can eliminate the resistance of the die hole 12, making the pressing process of the particles smoother, reducing waste heat and mesh wear, and ensuring the efficiency and quality of particle processing; continue to refer to Figure 7 In this embodiment, the outer end of the mold hole 12 is set as a hexagonal hole 121, and the inner end is set as a circular hole 122. Multiple mold holes 12 are distributed in a grid at the bottom of the meshing groove 111. The honeycomb structure formed by the hexagonal holes 121 can most effectively fill the plane in two-dimensional space and make full use of the effective area at the bottom of the meshing groove 111.

[0047] like Figure 8As shown, the die holes 12 in this embodiment penetrate the convex teeth 115 of the hollow gear roller 11. When the convex teeth 115 are fully meshed with the meshing grooves 111, the positions of the die holes 12 on the convex teeth 115 and the positions of the die holes 12 on the meshing grooves 111 are staggered. By staggering the die holes 12, it is possible to ensure the number of openings while avoiding the structural strength of the hollow gear roller 11 being insufficient due to too dense openings in the meshing grooves 111.

[0048] Furthermore, the above embodiment also includes a feed bin 3, a filtering structure 4 and a recovery bin 5. The feed bin 3 is arranged above the roller mechanism 1. The feed bin 3 is arranged as a funnel-shaped structure and is fixedly mounted on the frame 6. The periphery of the bottom does not exceed the edge of the hollow gear roller 11, and is used to transport materials from the upper direction to the meshing position of the two hollow gear rollers 11. The filtering structure 4 is arranged below the end of the discharge mechanism 2. The filtering structure 4 includes a filter screen 41, a material receiving trough 42 and a collecting port 43. The filter screen 41 is arranged obliquely below the end of the discharge mechanism 2, and can screen and separate the finished particles falling from the upper side. The separated finished particles are output from the collecting port 43. Non-compliant materials fall into the material receiving trough 42 below the filter screen 41 and enter the recovery bin 5 through the material receiving trough 42. Materials falling from below the meshing position of the two hollow gear rollers 11 will also enter the recovery bin 5. The recovery bin 5 is detachably arranged at the bottom of the frame 6, which is convenient for adding the materials in the recovery bin 5 back to the feed bin 3.

[0049] Embodiment 2: Embodiment 1 discloses a specific structure of the unloading mechanism 2. Based on this, this embodiment proposes another specific structure of the unloading mechanism 2, such as Figure 8 , 9 As shown, the unloading mechanism 2 includes a horizontal shaft 24, a guide groove 25 and a second scraper 26. The end of the horizontal shaft 24 is fixedly connected to the frame 6. The two ends of the hollow gear roller 11 are rotatably sleeved on the two ends of the horizontal shaft 24. The guide groove 25 is set in a shape of being high in the middle and low at both ends. The end is set close to the end of the hollow gear roller 11. The inner edge is fixedly connected to the horizontal shaft 24, and the outer edge is set close to the inner wall below the meshing part of the two hollow gear rollers 11. The second scraper 26 is set on the outer edge of the guide groove 25. It can be understood that when the molding material on the die hole 12 rotates to the second scraper 26, it can be scraped into finished particles and slide to the end of the hollow gear roller 11 through the guide groove 25, and then discharged to the outside through the end gap of the hollow gear roller 11. When using the unloading mechanism 2, it is necessary to set the filtering structure 4 at both ends of the hollow gear roller 11, which is suitable for the production scene of hard materials with low rotation speed or materials with larger particle size.

[0050] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. An internal discharge type roller gear granulator, characterized in that: include: frame; The roller mechanism comprises a hollow gear roller and a die hole, wherein the two hollow gear rollers are arranged horizontally side by side and meshed with each other, and both ends are rotatably connected to the frame respectively, and the die hole runs through the bottom of the meshing groove of the hollow gear roller; The unloading mechanism comprises two ends of the hollow gear roller which are rotatably sleeved on the two ends of the unloading mechanism, the ends of the unloading mechanism are fixedly connected to the frame, and the middle part is arranged close to the inner wall of the hollow gear roller, so as to scrape off the molding material extruded from the die hole and discharge it to the outside from the ends of the hollow gear roller.

2. The inner discharge type roller gear granulator according to claim 1, characterized in that: The unloading mechanism includes a particle receiving barrel, a first particle scraper and a discharging mechanism. The first particle scraper is fixed above the particle receiving barrel and is arranged close to the inner wall of the hollow gear roller. The two ends of the hollow gear roller are rotatably connected to the two ends of the particle receiving barrel. The discharging structure is used to transport the molding material in the particle receiving barrel from the end to the outside.

3. The inner discharge type roller gear granulator according to claim 2, characterized in that: The hollow gear roller includes a roller, a sleeve and a support plate. The sleeves are coaxially arranged at both ends of the roller. The roller and the sleeve are fixedly connected via a plurality of support plates. The inner wall of the sleeve is rotatably connected to both ends of the particle receiving cylinder.

4. The inner discharge type roller gear granulator according to claim 2, characterized in that: The discharging mechanism comprises a screw and a second driving mechanism. The screw is arranged in the particle receiving barrel, and two ends of the screw respectively pass through two ends of the particle receiving barrel. The second driving mechanism is used to drive the screw to rotate.

5. The inner discharge type roller gear granulator according to claim 4, characterized in that: The particle receiving cylinder comprises an arc groove and a round tube, the round tubes are respectively arranged at both ends of the arc groove, the hollow gear roller, the arc groove, the round tube and the screw are arranged on a common central axis, and the two ends of the hollow gear roller are rotatably sleeved on the round tube.

6. The inner discharge type roller gear granulator according to claim 5, characterized in that: The particle receiving cylinder further comprises a baffle and a wing plate, the two ends of the baffle are respectively provided with the wing plates, the upper edge of the baffle is installed with the first particle scraper, and the lower edge is connected to the edge of the arc groove close to the inner side of the roller mechanism.

7. An internal discharge type roller gear granulator according to any one of claims 1 to 6, characterized in that: The die hole is configured as a tapered hole, and the hole diameter gradually decreases from the outer wall to the inner wall of the hollow gear roller.

8. The inner discharge type roller gear granulator according to claim 7, characterized in that: The outer end of the die hole is set as a hexagonal hole, and the inner end is set as a circular hole. A plurality of the die holes are distributed in a grid at the bottom of the meshing groove.

9. The inner discharge type roller gear granulator according to claim 7, characterized in that: The die hole penetrates the convex teeth of the hollow gear roller, and when the convex teeth are fully meshed with the meshing grooves, the position of the die hole on the convex teeth and the position of the die hole on the meshing grooves are interlaced with each other.

10. The inner discharge type roller gear granulator according to claim 1, characterized in that: The unloading mechanism includes a transverse axis, a guide groove and a second scraper, the end of the transverse axis is fixedly connected to the frame, the two ends of the hollow gear roller are rotatably sleeved on the two ends of the transverse axis, the guide groove is set in a shape that is high in the middle and low at both ends, the end is set close to the end of the hollow gear roller, the inner edge is fixedly connected to the transverse axis, and the outer edge is set close to the inner wall below the meshing position of the two hollow gear rollers, and the second scraper is set on the outer edge of the guide groove.

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