Vertical circular mold particle forming machine

Abstract

The invention discloses a vertical circular mold particle forming machine which comprises a granulation chamber, a mold base and a circular mold, the granulation chamber comprises a supporting wall plate, the mold base is arranged at the bottom of the granulation chamber, and a first limiting ring is arranged on the periphery of the mold base in a protruding mode; the ring die is embedded in the die holder, and the outer side face of the bottom of the ring die tightly abuts against the inner side face of the first limiting ring; the outer ring end of the annular cover plate is detachably connected with the supporting wall plate, the inner ring end of the annular cover plate covers the upper end face of the annular mold, the annular cover plate further comprises a second limiting ring, the second limiting ring is arranged on the lower surface of the annular cover plate, and the inner side face of the second limiting ring tightly abuts against the outer side face of the annular mold. Therefore, the upper end part and the lower end part of the ring die are respectively restrained and fixed at the same time by utilizing the limiting structures of the die holder and the annular cover plate, so that the stress of the ring die generated by friction and material extrusion during the operation of the compression roller can be dispersed and counteracted, the stress damage is avoided, and the service life of the ring die is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of particle manufacturing, in particular to a vertical ring die particle forming machine. Background Art

[0002] Biomass energy is a widely distributed renewable energy source that is carbon neutral and can balance CO 2 In order to improve the energy density of biomass, biomass is usually converted into biomass pellets. Biomass pellets are a kind of solid renewable fuel, usually compressed and formed from various raw materials such as straw, rice husk, peanut shell, corn cob, tea shell, cottonseed shell, etc. Compared with traditional fuels, biomass fuel is made into pellets, which not only compresses the volume and saves storage space, but also facilitates transportation and reduces transportation costs.

[0003] Biomass pellet machines mostly use die extrusion, with the main shaft driving the pressure roller, which squeezes the material into pellets through the die. In this process, since the ring die of the pellet machine is a porous ring part and the working conditions are harsh, it is subjected to the extrusion force of the pressure roller and the friction of the material for a long time during use, which causes bending stress and contact pressure stress. At the same time, the ring die is easily fatigued and damaged under the alternating effect of asymmetric cycles, which greatly reduces the service life of the ring die. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a vertical ring die pellet forming machine.

[0005] A vertical ring die pellet forming machine according to an embodiment of the present invention comprises: a granulation chamber, the granulation chamber comprising a supporting wall panel; A die base, the die base is arranged at the bottom of the granulation chamber, and a first limiting ring is protruded at the periphery of the die base; A ring die, wherein the ring die is embedded in the die base, and the outer side surface of the bottom of the ring die is in close contact with the inner side surface of the first limiting ring; and An annular cover plate, wherein the outer ring end of the annular cover plate is detachably connected to the supporting wall plate, and the inner ring end is covered on the upper end surface of the ring die. The annular cover plate also includes a second limiting ring, which is arranged on the lower surface of the annular cover plate, and the inner side surface of the second limiting ring is tightly abutted against the outer side surface of the ring die.

[0006] According to some embodiments of the present invention, the annular cover plate is a metal annular cover plate.

[0007] According to some embodiments of the present invention, the method further comprises: a first damping member, wherein the first damping member is arranged between the ring die and the annular cover plate.

[0008] According to some embodiments of the present invention, the first damping member is a flexible metal sheet.

[0009] According to some embodiments of the present invention, a vibration-damping pad is further provided on the mold base, and the vibration-damping pad is a rubber pad.

[0010] According to some embodiments of the present invention, it also includes: a rotating gear ring, a driving member and a cutting knife, the rotating gear ring is arranged on the top of the granulation chamber, the driving member is fixedly connected to the supporting wall plate, the rotating gear ring is dynamically connected to the driving member, the top of the cutting knife is connected to the rotating gear ring, and the bottom is suspended and extends above the bottom of the granulation chamber.

[0011] According to some embodiments of the present invention, the cutting knife includes a knife head and a knife body, and the knife head is detachably connected to the knife body.

[0012] According to some embodiments of the present invention, it also includes: a support wheel assembly, the support wheel assembly includes a support shaft and a support seat, the support seat is fixedly connected to the outer side surface of the support wall plate, one end of the support shaft is rotatably connected to the support seat, and the other end is a suspended end and passes through the support wall plate in the granulation chamber, and the rotating gear ring is arranged on the suspended end.

[0013] Beneficial Effects

[0014] The present invention utilizes the limiting structure of the die base and the annular cover plate to simultaneously constrain and fix the upper end and the lower end of the ring die, so that the stress generated by friction and material extrusion when the pressure roller is running can be dispersed and offset, avoiding stress damage and prolonging the service life of the ring die.

[0015] At the same time, the restraining force of the annular cover on the axial direction of the ring die can not only offset part of the vertical force of the ring die extrusion hole and improve the service life of the ring die, but also reduce the wear of the limiting components caused by the swing of the ring die. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic diagram of a vertical ring die pellet forming machine according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a granulation chamber according to an embodiment of the present invention; Figure 3 is a schematic cross-sectional structure diagram of a granulation chamber according to an embodiment of the present invention; Figure 4 is a schematic structural diagram of a rotating gear ring according to an embodiment of the present invention; Figure 5 is a schematic structural diagram of a support wheel assembly according to an embodiment of the present invention.

[0017] Reference numerals: 100. Vertical ring die pellet forming machine 1. Granulating chamber; 2. Support wall panel; 3. Die base; 31. First limiting ring; 4. Ring die; 5. Ring cover plate; 51. Second limiting ring; 6. Rotating gear ring; 7. Driving member; 8. Cutting knife; 81. Knife head; 82. Knife body; 9. Support wheel assembly; 91. Support shaft; 92. Support seat. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solutions in the embodiments of the present disclosure in conjunction with the drawings in the embodiments disclosed in this application. The description of the embodiments is actually only illustrative and exemplary, and does not serve as any limitation to the present disclosure and its application or use; based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without carrying out creative work should fall within the scope of protection of the present disclosure. In addition, the technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be regarded as part of the specification.

[0019] Combination Figures 1 to 5 As shown, a vertical ring die pellet forming machine 100 of an embodiment of the present invention generally includes: a motor, a reducer, a transmission main shaft and a granulation chamber 1, wherein the granulation chamber 1 includes a ring die 4 and a pressure roller, the ring die 4 is arranged in the granulation chamber 1, and the pressure roller is arranged on the inner side of the ring die 4. When in use, the power of the motor is transmitted to the transmission main shaft through the reducer, and the pressure roller is driven to rotate through the transmission main shaft, and the pressure roller squeezes the crushed biomass powder through the ring die 4, thereby becoming biomass molded particles.

[0020] Furthermore, if Figure 3 As shown, the vertical ring die 4 pellet forming machine 100 is provided with a die base 3 and an annular cover plate 5, wherein the die base 3 is arranged at the bottom of the granulation chamber 1, and a first limiting ring 31 is protruded at the periphery of the die base 3, the ring die 4 is embedded in the die base 3, and the bottom outer side surface of the ring die 4 is tightly abutted against the inner side surface of the first limiting ring 31, and at the same time, the granulation chamber 1 includes a supporting wall plate 2, the outer ring end of the annular cover plate 5 is detachably connected to the supporting wall plate 2, and the inner ring end is covered on the upper end surface of the ring die 4, and the lower surface of the annular cover plate 5 is provided with a second limiting ring 51, and the inner side surface of the second limiting ring 51 is tightly abutted against the outer side surface of the ring die 4.

[0021] It should be noted here that the supporting wall panel 2 can be the shell of the granulation chamber 1, but the thickness of the shell is much greater than the thickness of the traditional shell, so that the shell can effectively play the role of a support, especially when multiple subsequent components require the supporting wall panel 2 to provide sufficient supporting force.

[0022] Therefore, the present invention utilizes the limiting structure of the die base 3 and the annular cover plate 5 to simultaneously constrain and fix the upper and lower ends of the ring die 4, so that the stress generated by friction and material extrusion when the pressure roller of the ring die 4 is running can be dispersed and offset, avoiding stress damage, especially reducing the stress imbalance problem caused by the suspension of the upper end of the ring die 4.

[0023] Specifically, the stress in the radial direction of the ring die 4 can be dispersed and offset by the structures of the first limiting ring 31 and the second limiting ring 51 respectively, and due to the limiting effect of the second limiting ring 51 of the annular cover plate 5, the radial force can be dispersed more evenly, avoiding stress concentration caused by uneven force on the upper and lower ends of the ring die 4 caused by the bottom of the ring die 4 being fixed and the top being suspended, and even uneven pressure on the material caused by slight eccentricity or vibration of the ring die 4, affecting the quality of the finished product.

[0024] At the same time, the axial restraining force of the annular cover plate 5 on the ring die 4 can not only offset part of the vertical force of the extrusion hole of the ring die 4, thereby helping to improve the service life of the ring die 4, but also reduce the wear of the limiting components caused by the swing of the ring die 4.

[0025] Preferably, the annular cover plate 5 can be made of a metal annular cover plate 5. On the one hand, the metal annular cover plate 5 has a high deadweight and can effectively "press" the ring die 4, thereby helping to offset part of the stress in the axial direction of the ring die 4 and improve the service life of the ring die 4. On the other hand, the metal material has better thermal conductivity, which is more conducive to partially dissipating the high temperature generated by friction and material extrusion during the operation of the ring die 4, thereby avoiding thermal stress damage to the ring die 4 and improving the service life of the ring die 4.

[0026] In addition, a first inclined surface can be provided at the upper end of the outer side surface of the ring die 4, that is, it is inclined from the middle position of the ring die 4 to the upper end of the ring die 4 and close to the axis, so as to form a conical structure. At the same time, a second inclined surface is provided on the inner side surface of the first limit ring 31, so that the first inclined surface and the second inclined surface are closely fitted during assembly. In this way, the convenience of assembly between the annular cover plate 5 and the ring die 4 can be improved through the structural setting of the inclined surface, and the requirements for the processing accuracy of the first limit ring 31 can also be reduced.

[0027] Similarly, a third inclined surface can be provided at the lower end of the outer surface of the ring die 4, and a fourth inclined surface can be provided on the inner surface of the second limiting ring 51. During assembly, the third inclined surface and the fourth inclined surface are tightly fitted, thereby improving the convenience of assembly between the mold base 3 and the ring die 4.

[0028] Furthermore, based on the above embodiment, the vertical ring die 4 pellet forming machine 100 also includes a first damping member, wherein the first damping member is arranged between the ring die 4 and the annular cover plate 5, so that the first damping member can allow a small displacement space above the ring die 4 to buffer vibration and reduce the risk of resonance.

[0029] At the same time, because the ring die 4 generates high temperature due to friction and material extrusion during operation, it is easy to cause expansion. If the upper and lower ends are rigidly fixed, the limited expansion is easy to cause stress concentration and even deformation. Therefore, the first damping member can form a structure in which the lower end of the ring die 4 is rigidly limited and fixed, and the upper end is flexibly limited and fixed, thereby allowing the ring die 4 to freely expand and contract in the axial direction and avoiding thermal stress damage to the ring die 4.

[0030] Specifically, the first damping member may be a spring or a rubber member. Preferably, the first damping member may be a flexible metal sheet, which can not only meet the purpose of buffering resonance, but also meet the effect of heat conduction.

[0031] In some embodiments of the present invention, a vibration-damping pad is further provided on the mold base 3, and the vibration-damping pad is a rubber pad, so that the vibration energy can be absorbed by the rubber pad to reduce the impact load.

[0032] In some embodiments of the present invention, Figure 4 As shown, the vertical ring die 4 pellet forming machine 100 also includes a rotating gear ring 6, a driving member 7 and a cutting knife 8, wherein the rotating gear ring 6 is arranged at the top of the pelletizing chamber 1, the driving member 7 is fixedly connected to the supporting wall plate 2, and the rotating gear ring 6 is connected to the driving member 7 in power. When in use, the driving member 7 drives the rotating gear to rotate, and the cutting knife 8 rotates following the rotation of the rotating gear. The cutting knife 8 includes a cutter head 81 and a cutter body 82, wherein the top of the cutting knife 8 is connected to the rotating gear ring 6, and the bottom is suspended and extends above the bottom of the pelletizing chamber 1. The cutter head 81 is tiltedly arranged on the cutter body 82, and the blade of the cutter head 81 is close to the outer side of the ring die 4. When the biomass powder is squeezed into strip-shaped particles through the ring die 4, the biomass particles are cut off by the cutter head 81 of the cutting knife 8, and then fall onto the platform at the bottom of the pelletizing chamber 1. At this time, the particles are pushed to the drop port through the cutter body 82. Moreover, arranging the cutting knife 8 in the air in this way can prevent powder from falling into the gap of the rotating gear ring 6, thereby reducing the rotation resistance of the cutting knife 8.

[0033] Preferably, the cutter head 81 can be detachably connected to the cutter body 82 , so that when the cutter head 81 is worn, the cutter head 81 can be easily replaced to reduce maintenance costs, and it is also convenient to adjust the inclination angle or position of the cutter head 81 .

[0034] Further, in some embodiments of the present invention, Figure 2 or Figure 5 As shown, it also includes a support wheel assembly 9, which includes a support shaft 91 and a support seat 92. The support seat 92 is fixedly connected to the support wall plate 2. One end of the support shaft 91 is rotatably connected to the support seat 92, and the other end is a suspended end and passes through the support wall plate 2 in the granulation chamber 1.

[0035] When in use, the rotating gear ring 6 is arranged on the suspended end. When the rotating gear ring 6 rotates, the support shaft 91 can not only play a supporting role, but also can rotate with the rotating gear ring 6. This can simplify the supporting structure of the rotating gear ring 6, reduce the force of the cutting mechanism on the supporting wall panel 2, and avoid the thickness of the supporting wall panel 2 being too thick to increase the weight of the vertical ring die 4 particle forming machine.

[0036] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, 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 should not be understood as limiting the present invention.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vertical ring die pellet forming machine, characterized in that: include: a granulation chamber, the granulation chamber comprising a supporting wall panel; A die base, the die base is arranged at the bottom of the granulation chamber, and a first limiting ring is protruded at the periphery of the die base; A ring die, wherein the ring die is embedded in the die base, and the outer side surface of the bottom of the ring die is in close contact with the inner side surface of the first limiting ring; and An annular cover plate, wherein the outer ring end of the annular cover plate is detachably connected to the supporting wall plate, and the inner ring end is covered on the upper end surface of the ring die. The annular cover plate also includes a second limiting ring, which is arranged on the lower surface of the annular cover plate, and the inner side surface of the second limiting ring is tightly abutted against the outer side surface of the ring die.

2. A vertical ring die pellet forming machine according to claim 1, characterized in that: The annular cover plate is a metal annular cover plate.

3. A vertical ring die pellet forming machine according to claim 1 or 2, characterized in that: Also includes: A first damping member is disposed between the ring die and the annular cover plate.

4. A vertical ring die pellet forming machine according to claim 3, characterized in that: The first damping member is a flexible metal sheet.

5. A vertical ring die pellet forming machine according to claim 1 or 2, characterized in that: The mold base is also provided with a vibration-damping pad, which is a rubber pad.

6. A vertical ring die pellet forming machine according to claim 1, characterized in that: Also includes: A rotating gear ring, a driving member and a cutting knife, wherein the rotating gear ring is arranged on the top of the granulation chamber, the driving member is fixedly connected to the supporting wall plate, the rotating gear ring is dynamically connected to the driving member, the top of the cutting knife is connected to the rotating gear ring, and the bottom is suspended and extends above the bottom of the granulation chamber.

7. A vertical ring die pellet forming machine according to claim 6, characterized in that: The cutting knife comprises a knife head and a knife body, and the knife head is detachably connected to the knife body.

8. A vertical ring die pellet forming machine according to claim 6, characterized in that: Also includes: A support wheel assembly, the support wheel assembly includes a support shaft and a support seat, the support seat is fixedly connected to the outer side surface of the support wall plate, one end of the support shaft is rotatably connected to the support seat, and the other end is a suspended end and passes through the support wall plate in the granulation chamber, and the rotating gear ring is arranged on the suspended end.

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