Vertical circular mold particle forming machine

Abstract

The utility model discloses a vertical type circular mould particle forming machine which comprises a granulation chamber, a mould base and a circular mould, the granulation chamber comprises a supporting wall plate, the mould base is arranged at the bottom of the granulation chamber, and a first limiting ring is arranged on the periphery of the mould 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] This utility model relates to the field of particle manufacturing technology, and in particular to a vertical ring die particle forming machine. Background Technology

[0002] Biomass energy is a widely distributed renewable energy source that is carbon neutral, balancing CO2 emissions and absorption. To increase the energy density of biomass, it is typically processed into biomass pellets. Biomass pellets are a type of solid renewable fuel, usually made from various agricultural waste materials such as straw, rice straw, rice husks, peanut shells, corn cobs, camellia husks, and cottonseed husks, compressed into pellet form. Compared to traditional fuels, biomass fuel in pellet form not only compresses volume, saving storage space, but also facilitates transportation and reduces transportation costs.

[0003] Biomass pellet mills mostly use a die extrusion method, with the main shaft driving the pressure rollers. The pressure rollers force the material through the die to be extruded into pellets. During this process, because the ring die of the pellet mill is a porous ring part, the working conditions are harsh. During use, it is subjected to the extrusion force of the pressure rollers and the friction force of the material for a long time, which causes bending stress and contact compressive stress. At the same time, under the asymmetric cyclic alternating action, the ring die is prone to fatigue failure, 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 includes:

[0006] Granulation chamber, the granulation chamber including supporting wall panels;

[0007] A mold base is located at the bottom of the granulation chamber, and a first limiting ring is provided at the periphery of the mold base;

[0008] A ring mold, wherein the ring mold is embedded in the mold base, and the bottom outer surface of the ring mold is in close contact with the inner surface of the first limiting ring; and

[0009] The annular cover plate has an outer ring end that is detachably connected to the supporting wall plate, and an inner ring end that covers the upper end face of the ring mold. The annular cover plate also includes a second limiting ring, which is disposed on the lower surface of the annular cover plate, and the inner side of the second limiting ring is in close contact with the outer side of the ring mold.

[0010] According to some embodiments of the present invention, the annular cover plate is a metal annular cover plate.

[0011] According to some embodiments of the present invention, it further includes: a first damping member, which is disposed between the ring mold and the annular cover plate.

[0012] According to some embodiments of the present invention, the first damping element is a flexible metal sheet.

[0013] According to some embodiments of the present invention, the mold base is further provided with a vibration damping pad, which is a rubber pad.

[0014] According to some embodiments of the present invention, it further includes: a rotating gear ring, a driving member, and a cutting blade. The rotating gear ring is disposed at the top of the granulation chamber, the driving member is fixedly connected to the supporting wall plate, the rotating gear ring is poweredly connected to the driving member, and the top of the cutting blade is connected to the rotating gear ring, while the bottom of the cutting blade is suspended and extends above the bottom of the granulation chamber.

[0015] According to some embodiments of the present invention, the cutting blade includes a cutting head and a cutting body, wherein the cutting head is detachably connected to the cutting body.

[0016] According to some embodiments of the present invention, it further includes: a support wheel assembly, the support wheel assembly including a support shaft and a support seat, the support seat being fixedly connected to the outer side of the support wall plate, one end of the support shaft being rotatably connected to the support seat, the other end being a suspended end, and passing through the support wall plate in the granulation chamber, the rotating toothed ring being disposed on the suspended end.

[0017] Beneficial effects

[0018] This invention utilizes the limiting structure of the mold base and the annular cover plate to simultaneously constrain and fix the upper and lower ends of the ring mold. In this way, the stress generated by friction and material extrusion during the operation of the pressure roller can be dispersed and offset, avoiding stress damage and extending the service life of the ring mold.

[0019] Meanwhile, the constraint force exerted on the ring die by the annular cover plate in the axial direction 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. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of a vertical ring die pellet forming machine according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the granulation chamber according to an embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional structural diagram of the granulation chamber according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the rotating gear ring according to an embodiment of the present utility model;

[0025] Figure 5 This is a structural schematic diagram of the support wheel assembly according to an embodiment of the present utility model.

[0026] Figure label:

[0027] 100. Vertical ring die pellet forming machine

[0028] 1. Granulation chamber; 2. Support wall panel; 3. Mold base; 31. First limiting ring; 4. Ring mold; 5. Annular cover plate; 51. Second limiting ring; 6. Rotating gear ring; 7. Drive component; 8. Cutting blade; 81. Blade head; 82. Blade body; 9. Support wheel assembly; 91. Support shaft; 92. Support base. Detailed Implementation

[0029] The technical solutions of the embodiments disclosed in this application will be clearly and completely described below with reference to the accompanying drawings. The descriptions of the embodiments are merely illustrative and exemplary, and are not intended to limit the scope of this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort should fall within the scope of protection of this disclosure. Furthermore, techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification.

[0030] Combination Figures 1 to 5 As shown, a vertical ring die pellet forming machine 100 according to an embodiment of the present invention typically includes: a motor, a reducer, a transmission main shaft, and a pelletizing chamber 1. The pelletizing chamber 1 includes a ring die 4 and a pressure roller. The ring die 4 is located inside the pelletizing chamber 1, and the pressure roller is located inside the ring die 4. In use, the power of the motor is transmitted to the transmission main shaft through the reducer, and the transmission main shaft drives the pressure roller to rotate. The pressure roller squeezes the crushed biomass powder through the ring die 4, thereby turning it into biomass pellets.

[0031] Furthermore, such as Figure 3As shown, the vertical ring die 4 pellet forming machine 100 is provided with a die base 3 and an annular cover plate 5. The die base 3 is located at the bottom of the pelletizing chamber 1, and a first limiting ring 31 is raised at the periphery of the die base 3. The ring die 4 is embedded in the die base 3, and the outer side of the bottom of the ring die 4 is in close contact with the inner side of the first limiting ring 31. Meanwhile, the pelletizing chamber 1 includes a support wall plate 2. The outer ring end of the annular cover plate 5 is detachably connected to the support wall plate 2, and the inner ring end is covered on the upper end face of the ring die 4. A second limiting ring 51 is provided on the lower surface of the annular cover plate 5, and the inner side of the second limiting ring 51 is in close contact with the outer side of the ring die 4.

[0032] It should be noted that the supporting wall plate 2 can be the shell of the granulation chamber 1, but the thickness of the shell is much greater than that of a traditional shell, so that the shell can effectively serve as a support, especially since multiple subsequent components require the supporting wall plate 2 to provide sufficient support.

[0033] Therefore, this utility model utilizes the limiting structure of the mold base 3 and the annular cover plate 5 to simultaneously constrain and fix the upper and lower ends of the ring mold 4. In this way, the stress generated by friction and material extrusion during the operation of the pressure roller can be dispersed and offset, avoiding stress damage. In particular, it can reduce the stress imbalance caused by the suspension of the upper end of the ring mold 4.

[0034] Specifically, the radial stress of the ring die 4 can be dispersed and offset by the structure of the first limiting ring 31 and the second limiting ring 51 respectively. Moreover, 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 due to the bottom being fixed and the top being suspended. It may even cause uneven material pressure due to slight eccentricity or vibration of the ring die 4, affecting the quality of the finished product.

[0035] At the same time, the constraint force of the annular cover plate 5 on the ring die 4 in the axial direction can not only offset part of the vertical force of the extrusion hole of the ring die 4, thus 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.

[0036] Preferably, the annular cover plate 5 can be made of metal. On the one hand, the metal annular cover plate 5 has a higher self-weight, which can effectively "press" the ring die 4, thereby helping to offset part of the axial stress of the ring die 4 and improve the service life of the ring die 4. On the other hand, the thermal conductivity of metal is better, which is more conducive to dissipating part of 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.

[0037] Furthermore, a first inclined surface can be provided at the upper end of the outer side of the ring mold 4, that is, inclined from the middle position of the ring mold 4 towards the upper end of the ring mold 4 and closer to the axis, thereby forming a conical structure. At the same time, a second inclined surface is provided on the inner side of the first limiting ring 31, so that the first inclined surface and the second inclined surface fit tightly together during assembly. This inclined surface structure can improve the ease of assembly between the annular cover plate 5 and the ring mold 4, and at the same time reduce the requirements for the machining accuracy of the first limiting ring 31.

[0038] Similarly, a third inclined surface can be provided at the lower end of the outer side of the ring mold 4, and a fourth inclined surface can be provided on the inner side of the second limiting ring 51. During assembly, the third inclined surface and the fourth inclined surface are tightly fitted, thereby improving the ease of assembly between the mold base 3 and the ring mold 4.

[0039] Furthermore, based on the above embodiments, the vertical ring die 4 pellet forming machine 100 also includes a first damping element, wherein the first damping element is disposed between the ring die 4 and the annular cover plate 5. In this way, the first damping element allows for a small displacement space above the ring die 4 to buffer vibration and reduce the risk of resonance.

[0040] Meanwhile, because the ring die 4 generates high temperature due to friction and material extrusion during operation, it is prone to expansion. If both the upper and lower ends are rigidly fixed, the expansion will be restricted, which may lead to stress concentration or even deformation. Therefore, the first damping component can make the ring die 4 form a structure with rigid limiting and fixing at the lower end and flexible limiting and fixing at the upper end, 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.

[0041] Specifically, the first damping element can be a spring or a rubber component. Preferably, the first damping element can be a flexible metal sheet, which can not only satisfy the purpose of buffering resonance but also the effect of heat conduction.

[0042] In some embodiments of this utility model, the mold base 3 is also provided with a vibration damping pad, which is a rubber pad. In this way, the vibration energy can be absorbed by the rubber pad, reducing the impact load.

[0043] In some embodiments of this utility model, such as Figure 4As shown, the vertical ring die pellet forming machine 100 also includes a rotating gear ring 6, a drive unit 7, and a cutting blade 8. The rotating gear ring 6 is located at the top of the pelletizing chamber 1, and the drive unit 7 is fixedly connected to the support wall plate 2. The rotating gear ring 6 and the drive unit 7 are poweredly connected. In use, the drive unit 7 drives the rotating gear to rotate, and the cutting blade 8 rotates along with the rotating gear. The cutting blade 8 includes a blade head 81 and a blade body 82. The top of the cutting blade 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 blade head 81 is inclined on the blade body 82, and the cutting edge of the blade head 81 is close to the outer side of the ring die 4. When biomass powder is extruded into strip-shaped pellets through the ring die 4, the biomass pellets are cut by the blade head 81 of the cutting blade 8 and fall onto the platform at the bottom of the pelletizing chamber 1. At this time, the pellets are pushed to the discharge port by the blade body 82. Moreover, suspending the cutting blade 8 in this way can prevent powder from falling into the gap of the rotating toothed ring 6 and reduce the rotational resistance of the cutting blade 8.

[0044] Preferably, the cutter head 81 can be detachably connected to the cutter body 82, so that when the cutter head 81 is worn, it can be easily replaced, reducing maintenance costs, and it is also convenient to adjust the tilt angle or position of the cutter head 81.

[0045] Furthermore, in some embodiments of this utility model, such as 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, which passes through the support wall plate 2 into the granulation chamber 1.

[0046] In use, the rotating gear ring 6 is mounted on the suspended end. When the rotating gear ring 6 rotates, the support shaft 91 not only provides support but also rotates with the rotating gear ring 6. This simplifies the support structure of the rotating gear ring 6, reduces the force exerted by the material cutting mechanism on the support wall plate 2, and prevents the support wall plate 2 from becoming too thick, thus increasing the weight of the vertical ring die 4 pellet forming machine.

[0047] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0049] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vertical ring die pellet forming machine, characterized in that, include: Granulation chamber, the granulation chamber including supporting wall panels; A mold base is located at the bottom of the granulation chamber, and a first limiting ring is provided at the periphery of the mold base; A ring mold, wherein the ring mold is embedded in the mold base, and the bottom outer surface of the ring mold is in close contact with the inner surface of the first limiting ring; and The annular cover plate has an outer ring end that is detachably connected to the supporting wall plate, and an inner ring end that covers the upper end face of the ring mold. The annular cover plate also includes a second limiting ring, which is disposed on the lower surface of the annular cover plate, and the inner side of the second limiting ring is in close contact with the outer side of the ring mold.

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

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

4. A vertical ring die pellet forming machine according to claim 3, characterized in that, The first damping element 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 vibration damping pads, which are rubber pads.

6. A vertical ring die pellet forming machine according to claim 1, characterized in that, Also includes: The granulation chamber includes a rotating gear ring, a drive unit, and a cutting blade. The rotating gear ring is located at the top of the granulation chamber, the drive unit is fixedly connected to the support wall plate, the rotating gear ring is poweredly connected to the drive unit, and the top of the cutting blade is connected to the rotating gear ring, while the bottom of the cutting blade 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 tool includes a cutting head and a cutting body, and the cutting head is detachably connected to the cutting body.

8. A vertical ring die pellet forming machine according to claim 6, characterized in that, Also includes: The support wheel assembly includes a support shaft and a support base. The support base is fixedly connected to the outer side of the support wall panel. One end of the support shaft is rotatably connected to the support base, and the other end is a suspended end that passes through the support wall panel in the granulation chamber. The rotating toothed ring is disposed on the suspended end.

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